From: oetiker Date: Thu, 17 Jan 2002 20:30:46 +0000 (+0000) Subject: this is not needed anymore X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=commitdiff_plain;h=79de2ee0cacf9c95efc7000a72b5d32118561e58 this is not needed anymore git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@66 a5681a0c-68f1-0310-ab6d-d61299d08faa --- diff --git a/config/libtool/libtool.m4 b/config/libtool/libtool.m4 deleted file mode 100644 index 2ad3206..0000000 --- a/config/libtool/libtool.m4 +++ /dev/null @@ -1,427 +0,0 @@ -## libtool.m4 - Configure libtool for the target system. -*-Shell-script-*- -## Copyright (C) 1996-1999 Free Software Foundation, Inc. -## Originally by Gordon Matzigkeit , 1996 -## -## This program is free software; you can redistribute it and/or modify -## it under the terms of the GNU General Public License as published by -## the Free Software Foundation; either version 2 of the License, or -## (at your option) any later version. -## -## This program is distributed in the hope that it will be useful, but -## WITHOUT ANY WARRANTY; without even the implied warranty of -## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -## General Public License for more details. -## -## You should have received a copy of the GNU General Public License -## along with this program; if not, write to the Free Software -## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -## -## As a special exception to the GNU General Public License, if you -## distribute this file as part of a program that contains a -## configuration script generated by Autoconf, you may include it under -## the same distribution terms that you use for the rest of that program. - -# serial 40 AC_PROG_LIBTOOL -AC_DEFUN(AC_PROG_LIBTOOL, -[AC_REQUIRE([AC_LIBTOOL_SETUP])dnl - -# Save cache, so that ltconfig can load it -AC_CACHE_SAVE - -# Actually configure libtool. ac_aux_dir is where install-sh is found. -CC="$CC" CFLAGS="$CFLAGS" CPPFLAGS="$CPPFLAGS" \ -LD="$LD" LDFLAGS="$LDFLAGS" LIBS="$LIBS" \ -LN_S="$LN_S" NM="$NM" RANLIB="$RANLIB" \ -DLLTOOL="$DLLTOOL" AS="$AS" OBJDUMP="$OBJDUMP" \ -${CONFIG_SHELL-/bin/sh} $ac_aux_dir/ltconfig --no-reexec \ -$libtool_flags --no-verify $ac_aux_dir/ltmain.sh $host \ -|| AC_MSG_ERROR([libtool configure failed]) - -# Reload cache, that may have been modified by ltconfig -AC_CACHE_LOAD - -# This can be used to rebuild libtool when needed -LIBTOOL_DEPS="$ac_aux_dir/ltconfig $ac_aux_dir/ltmain.sh" - -# Always use our own libtool. -LIBTOOL='$(SHELL) $(top_builddir)/libtool' -AC_SUBST(LIBTOOL)dnl - -# Redirect the config.log output again, so that the ltconfig log is not -# clobbered by the next message. -exec 5>>./config.log -]) - -AC_DEFUN(AC_LIBTOOL_SETUP, -[AC_PREREQ(2.13)dnl -AC_REQUIRE([AC_ENABLE_SHARED])dnl -AC_REQUIRE([AC_ENABLE_STATIC])dnl -AC_REQUIRE([AC_ENABLE_FAST_INSTALL])dnl -AC_REQUIRE([AC_CANONICAL_HOST])dnl -AC_REQUIRE([AC_CANONICAL_BUILD])dnl -AC_REQUIRE([AC_PROG_RANLIB])dnl -AC_REQUIRE([AC_PROG_CC])dnl -AC_REQUIRE([AC_PROG_LD])dnl -AC_REQUIRE([AC_PROG_NM])dnl -AC_REQUIRE([AC_PROG_LN_S])dnl -dnl - -# Check for any special flags to pass to ltconfig. -libtool_flags="--cache-file=$cache_file" -test "$enable_shared" = no && libtool_flags="$libtool_flags --disable-shared" -test "$enable_static" = no && libtool_flags="$libtool_flags --disable-static" -test "$enable_fast_install" = no && libtool_flags="$libtool_flags --disable-fast-install" -test "$ac_cv_prog_gcc" = yes && libtool_flags="$libtool_flags --with-gcc" -test "$ac_cv_prog_gnu_ld" = yes && libtool_flags="$libtool_flags --with-gnu-ld" -ifdef([AC_PROVIDE_AC_LIBTOOL_DLOPEN], -[libtool_flags="$libtool_flags --enable-dlopen"]) -ifdef([AC_PROVIDE_AC_LIBTOOL_WIN32_DLL], -[libtool_flags="$libtool_flags --enable-win32-dll"]) -AC_ARG_ENABLE(libtool-lock, - [ --disable-libtool-lock avoid locking (might break parallel builds)]) -test "x$enable_libtool_lock" = xno && libtool_flags="$libtool_flags --disable-lock" -test x"$silent" = xyes && libtool_flags="$libtool_flags --silent" - -# Some flags need to be propagated to the compiler or linker for good -# libtool support. -case "$host" in -*-*-irix6*) - # Find out which ABI we are using. - echo '[#]line __oline__ "configure"' > conftest.$ac_ext - if AC_TRY_EVAL(ac_compile); then - case "`/usr/bin/file conftest.o`" in - *32-bit*) - LD="${LD-ld} -32" - ;; - *N32*) - LD="${LD-ld} -n32" - ;; - *64-bit*) - LD="${LD-ld} -64" - ;; - esac - fi - rm -rf conftest* - ;; - -*-*-sco3.2v5*) - # On SCO OpenServer 5, we need -belf to get full-featured binaries. - SAVE_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS -belf" - AC_CACHE_CHECK([whether the C compiler needs -belf], lt_cv_cc_needs_belf, - [AC_TRY_LINK([],[],[lt_cv_cc_needs_belf=yes],[lt_cv_cc_needs_belf=no])]) - if test x"$lt_cv_cc_needs_belf" != x"yes"; then - # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf - CFLAGS="$SAVE_CFLAGS" - fi - ;; - -ifdef([AC_PROVIDE_AC_LIBTOOL_WIN32_DLL], -[*-*-cygwin* | *-*-mingw*) - AC_CHECK_TOOL(DLLTOOL, dlltool, false) - AC_CHECK_TOOL(AS, as, false) - AC_CHECK_TOOL(OBJDUMP, objdump, false) - ;; -]) -esac -]) - -# AC_LIBTOOL_DLOPEN - enable checks for dlopen support -AC_DEFUN(AC_LIBTOOL_DLOPEN, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])]) - -# AC_LIBTOOL_WIN32_DLL - declare package support for building win32 dll's -AC_DEFUN(AC_LIBTOOL_WIN32_DLL, [AC_BEFORE([$0], [AC_LIBTOOL_SETUP])]) - -# AC_ENABLE_SHARED - implement the --enable-shared flag -# Usage: AC_ENABLE_SHARED[(DEFAULT)] -# Where DEFAULT is either `yes' or `no'. 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-static void gdImageTileApply(gdImagePtr im, int x, int y); - -gdImagePtr gdImageCreate(int sx, int sy) -{ - int i; - gdImagePtr im; - im = (gdImage *) calloc(1,sizeof(gdImage)); - /* NOW ROW-MAJOR IN GD 1.3 */ - im->pixels = (unsigned char **) malloc(sizeof(unsigned char *) * sy); - im->polyInts = 0; - im->polyAllocated = 0; - im->brush = 0; - im->tile = 0; - im->style = 0; - for (i=0; (ipixels[i] = (unsigned char *) calloc( - sx, sizeof(unsigned char)); - } - im->sx = sx; - im->sy = sy; - im->colorsTotal = 0; - im->transparent = (-1); - im->interlace = 0; - return im; -} - -void gdImageDestroy(gdImagePtr im) -{ - int i; - for (i=0; (isy); i++) { - free(im->pixels[i]); - } - free(im->pixels); - if (im->polyInts) { - free(im->polyInts); - } - if (im->style) { - free(im->style); - } - free(im); -} - -int gdImageColorClosest(gdImagePtr im, int r, int g, int b) -{ - int i; - long rd, gd, bd; - int ct = (-1); - long mindist = 0; - for (i=0; (i<(im->colorsTotal)); i++) { - long dist; - if (im->open[i]) { - continue; - } - rd = (im->red[i] - r); - gd = (im->green[i] - g); - bd = (im->blue[i] - b); - dist = rd * rd + gd * gd + bd * bd; - if ((i == 0) || (dist < mindist)) { - mindist = dist; - ct = i; - } - } - return ct; -} - -int gdImageColorExact(gdImagePtr im, int r, int g, int b) -{ - int i; - for (i=0; (i<(im->colorsTotal)); i++) { - if (im->open[i]) { - continue; - } - if ((im->red[i] == r) && - (im->green[i] == g) && - (im->blue[i] == b)) { - return i; - } - } - return -1; -} - -int gdImageColorAllocate(gdImagePtr im, int r, int g, int b) -{ - int i; - int ct = (-1); - for (i=0; (i<(im->colorsTotal)); i++) { - if (im->open[i]) { - ct = i; - break; - } - } - if (ct == (-1)) { - ct = im->colorsTotal; - if (ct == gdMaxColors) { - return -1; - } - im->colorsTotal++; - } - im->red[ct] = r; - im->green[ct] = g; - im->blue[ct] = b; - im->open[ct] = 0; - return ct; -} - -void gdImageColorDeallocate(gdImagePtr im, int color) -{ - /* Mark it open. */ - im->open[color] = 1; -} - -void gdImageColorTransparent(gdImagePtr im, int color) -{ - im->transparent = color; -} - -void gdImageSetPixel(gdImagePtr im, int x, int y, int color) -{ - int p; - switch(color) { - case gdStyled: - if (!im->style) { - /* Refuse to draw if no style is set. */ - return; - } else { - p = im->style[im->stylePos++]; - } - if (p != (gdTransparent)) { - gdImageSetPixel(im, x, y, p); - } - im->stylePos = im->stylePos % im->styleLength; - break; - case gdStyledBrushed: - if (!im->style) { - /* Refuse to draw if no style is set. */ - return; - } - p = im->style[im->stylePos++]; - if ((p != gdTransparent) && (p != 0)) { - gdImageSetPixel(im, x, y, gdBrushed); - } - im->stylePos = im->stylePos % im->styleLength; - break; - case gdBrushed: - gdImageBrushApply(im, x, y); - break; - case gdTiled: - gdImageTileApply(im, x, y); - break; - default: - if (gdImageBoundsSafe(im, x, y)) { - /* NOW ROW-MAJOR IN GD 1.3 */ - im->pixels[y][x] = color; - } - break; - } -} - -static void gdImageBrushApply(gdImagePtr im, int x, int y) -{ - int lx, ly; - int hy; - int hx; - int x1, y1, x2, y2; - int srcx, srcy; - if (!im->brush) { - return; - } - hy = gdImageSY(im->brush)/2; - y1 = y - hy; - y2 = y1 + gdImageSY(im->brush); - hx = gdImageSX(im->brush)/2; - x1 = x - hx; - x2 = x1 + gdImageSX(im->brush); - srcy = 0; - for (ly = y1; (ly < y2); ly++) { - srcx = 0; - for (lx = x1; (lx < x2); lx++) { - int p; - p = gdImageGetPixel(im->brush, srcx, srcy); - /* Allow for non-square brushes! */ - if (p != gdImageGetTransparent(im->brush)) { - gdImageSetPixel(im, lx, ly, - im->brushColorMap[p]); - } - srcx++; - } - srcy++; - } -} - -static void gdImageTileApply(gdImagePtr im, int x, int y) -{ - int srcx, srcy; - int p; - if (!im->tile) { - return; - } - srcx = x % gdImageSX(im->tile); - srcy = y % gdImageSY(im->tile); - p = gdImageGetPixel(im->tile, srcx, srcy); - /* Allow for transparency */ - if (p != gdImageGetTransparent(im->tile)) { - gdImageSetPixel(im, x, y, - im->tileColorMap[p]); - } -} - -int gdImageGetPixel(gdImagePtr im, int x, int y) -{ - if (gdImageBoundsSafe(im, x, y)) { - /* NOW ROW-MAJOR IN GD 1.3 */ - return im->pixels[y][x]; - } else { - return 0; - } -} - -/* Bresenham as presented in Foley & Van Dam */ - -void gdImageLine(gdImagePtr im, int x1, int y1, int x2, int y2, int color) -{ - int dx, dy, incr1, incr2, d, x, y, xend, yend, xdirflag, ydirflag; - dx = abs(x2-x1); - dy = abs(y2-y1); - if (dy <= dx) { - d = 2*dy - dx; - incr1 = 2*dy; - incr2 = 2 * (dy - dx); - if (x1 > x2) { - x = x2; - y = y2; - ydirflag = (-1); - xend = x1; - } else { - x = x1; - y = y1; - ydirflag = 1; - xend = x2; - } - gdImageSetPixel(im, x, y, color); - if (((y2 - y1) * ydirflag) > 0) { - while (x < xend) { - x++; - if (d <0) { - d+=incr1; - } else { - y++; - d+=incr2; - } - gdImageSetPixel(im, x, y, color); - } - } else { - while (x < xend) { - x++; - if (d <0) { - d+=incr1; - } else { - y--; - d+=incr2; - } - gdImageSetPixel(im, x, y, color); - } - } - } else { - d = 2*dx - dy; - incr1 = 2*dx; - incr2 = 2 * (dx - dy); - if (y1 > y2) { - y = y2; - x = x2; - yend = y1; - xdirflag = (-1); - } else { - y = y1; - x = x1; - yend = y2; - xdirflag = 1; - } - gdImageSetPixel(im, x, y, color); - if (((x2 - x1) * xdirflag) > 0) { - while (y < yend) { - y++; - if (d <0) { - d+=incr1; - } else { - x++; - d+=incr2; - } - gdImageSetPixel(im, x, y, color); - } - } else { - while (y < yend) { - y++; - if (d <0) { - d+=incr1; - } else { - x--; - d+=incr2; - } - gdImageSetPixel(im, x, y, color); - } - } - } -} - -static void dashedSet(gdImagePtr im, int x, int y, int color, - int *onP, int *dashStepP); - -void gdImageDashedLine(gdImagePtr im, int x1, int y1, int x2, int y2, int color) -{ - int dx, dy, incr1, incr2, d, x, y, xend, yend, xdirflag, ydirflag; - int dashStep = 0; - int on = 1; - dx = abs(x2-x1); - dy = abs(y2-y1); - if (dy <= dx) { - d = 2*dy - dx; - incr1 = 2*dy; - incr2 = 2 * (dy - dx); - if (x1 > x2) { - x = x2; - y = y2; - ydirflag = (-1); - xend = x1; - } else { - x = x1; - y = y1; - ydirflag = 1; - xend = x2; - } - dashedSet(im, x, y, color, &on, &dashStep); - if (((y2 - y1) * ydirflag) > 0) { - while (x < xend) { - x++; - if (d <0) { - d+=incr1; - } else { - y++; - d+=incr2; - } - dashedSet(im, x, y, color, &on, &dashStep); - } - } else { - while (x < xend) { - x++; - if (d <0) { - d+=incr1; - } else { - y--; - d+=incr2; - } - dashedSet(im, x, y, color, &on, &dashStep); - } - } - } else { - d = 2*dx - dy; - incr1 = 2*dx; - incr2 = 2 * (dx - dy); - if (y1 > y2) { - y = y2; - x = x2; - yend = y1; - xdirflag = (-1); - } else { - y = y1; - x = x1; - yend = y2; - xdirflag = 1; - } - dashedSet(im, x, y, color, &on, &dashStep); - if (((x2 - x1) * xdirflag) > 0) { - while (y < yend) { - y++; - if (d <0) { - d+=incr1; - } else { - x++; - d+=incr2; - } - dashedSet(im, x, y, color, &on, &dashStep); - } - } else { - while (y < yend) { - y++; - if (d <0) { - d+=incr1; - } else { - x--; - d+=incr2; - } - dashedSet(im, x, y, color, &on, &dashStep); - } - } - } -} - -static void dashedSet(gdImagePtr im, int x, int y, int color, - int *onP, int *dashStepP) -{ - int dashStep = *dashStepP; - int on = *onP; - dashStep++; - if (dashStep == gdDashSize) { - dashStep = 0; - on = !on; - } - if (on) { - gdImageSetPixel(im, x, y, color); - } - *dashStepP = dashStep; - *onP = on; -} - - -int gdImageBoundsSafe(gdImagePtr im, int x, int y) -{ - return (!(((y < 0) || (y >= im->sy)) || - ((x < 0) || (x >= im->sx)))); -} - -void gdImageChar(gdImagePtr im, gdFontPtr f, int x, int y, - int c, int color) -{ - int cx, cy; - int px, py; - int fline; - cx = 0; - cy = 0; - if ((c < f->offset) || (c >= (f->offset + f->nchars))) { - return; - } - fline = (c - f->offset) * f->h * f->w; - for (py = y; (py < (y + f->h)); py++) { - for (px = x; (px < (x + f->w)); px++) { - if (f->data[fline + cy * f->w + cx]) { - gdImageSetPixel(im, px, py, color); - } - cx++; - } - cx = 0; - cy++; - } -} - -void gdImageCharUp(gdImagePtr im, gdFontPtr f, - int x, int y, int c, int color) -{ - int cx, cy; - int px, py; - int fline; - cx = 0; - cy = 0; - if ((c < f->offset) || (c >= (f->offset + f->nchars))) { - return; - } - fline = (c - f->offset) * f->h * f->w; - for (py = y; (py > (y - f->w)); py--) { - for (px = x; (px < (x + f->h)); px++) { - if (f->data[fline + cy * f->w + cx]) { - gdImageSetPixel(im, px, py, color); - } - cy++; - } - cy = 0; - cx++; - } -} - -void gdImageString(gdImagePtr im, gdFontPtr f, - int x, int y, unsigned char *s, int color) -{ - int i; - int l; - l = strlen(s); - for (i=0; (iw; - } -} - -void gdImageStringUp(gdImagePtr im, gdFontPtr f, - int x, int y, unsigned char *s, int color) -{ - int i; - int l; - l = strlen(s); - for (i=0; (iw; - } -} - -static int strlen16(unsigned short *s); - -void gdImageString16(gdImagePtr im, gdFontPtr f, - int x, int y, unsigned short *s, int color) -{ - int i; - int l; - l = strlen16(s); - for (i=0; (iw; - } -} - -void gdImageStringUp16(gdImagePtr im, gdFontPtr f, - int x, int y, unsigned short *s, int color) -{ - int i; - int l; - l = strlen16(s); - for (i=0; (iw; - } -} - -static int strlen16(unsigned short *s) -{ - int len = 0; - while (*s) { - s++; - len++; - } - return len; -} - -/* s and e are integers modulo 360 (degrees), with 0 degrees - being the rightmost extreme and degrees changing clockwise. - cx and cy are the center in pixels; w and h are the horizontal - and vertical diameter in pixels. Nice interface, but slow, since - I don't yet use Bresenham (I'm using an inefficient but - simple solution with too much work going on in it; generalizing - Bresenham to ellipses and partial arcs of ellipses is non-trivial, - at least for me) and there are other inefficiencies (small circles - do far too much work). */ - -void gdImageArc(gdImagePtr im, int cx, int cy, int w, int h, int s, int e, int color) -{ - int i; - int lx = 0, ly = 0; - int w2, h2; - w2 = w/2; - h2 = h/2; - while (e < s) { - e += 360; - } - for (i=s; (i <= e); i++) { - int x, y; - x = ((long)cost[i % 360] * (long)w2 / costScale) + cx; - y = ((long)sint[i % 360] * (long)h2 / sintScale) + cy; - if (i != s) { - gdImageLine(im, lx, ly, x, y, color); - } - lx = x; - ly = y; - } -} - - -#if 0 - /* Bresenham octant code, which I should use eventually */ - int x, y, d; - x = 0; - y = w; - d = 3-2*w; - while (x < y) { - gdImageSetPixel(im, cx+x, cy+y, color); - if (d < 0) { - d += 4 * x + 6; - } else { - d += 4 * (x - y) + 10; - y--; - } - x++; - } - if (x == y) { - gdImageSetPixel(im, cx+x, cy+y, color); - } -#endif - -void gdImageFillToBorder(gdImagePtr im, int x, int y, int border, int color) -{ - int lastBorder; - /* Seek left */ - int leftLimit, rightLimit; - int i; - leftLimit = (-1); - if (border < 0) { - /* Refuse to fill to a non-solid border */ - return; - } - for (i = x; (i >= 0); i--) { - if (gdImageGetPixel(im, i, y) == border) { - break; - } - gdImageSetPixel(im, i, y, color); - leftLimit = i; - } - if (leftLimit == (-1)) { - return; - } - /* Seek right */ - rightLimit = x; - for (i = (x+1); (i < im->sx); i++) { - if (gdImageGetPixel(im, i, y) == border) { - break; - } - gdImageSetPixel(im, i, y, color); - rightLimit = i; - } - /* Look at lines above and below and start paints */ - /* Above */ - if (y > 0) { - lastBorder = 1; - for (i = leftLimit; (i <= rightLimit); i++) { - int c; - c = gdImageGetPixel(im, i, y-1); - if (lastBorder) { - if ((c != border) && (c != color)) { - gdImageFillToBorder(im, i, y-1, - border, color); - lastBorder = 0; - } - } else if ((c == border) || (c == color)) { - lastBorder = 1; - } - } - } - /* Below */ - if (y < ((im->sy) - 1)) { - lastBorder = 1; - for (i = leftLimit; (i <= rightLimit); i++) { - int c; - c = gdImageGetPixel(im, i, y+1); - if (lastBorder) { - if ((c != border) && (c != color)) { - gdImageFillToBorder(im, i, y+1, - border, color); - lastBorder = 0; - } - } else if ((c == border) || (c == color)) { - lastBorder = 1; - } - } - } -} - -void gdImageFill(gdImagePtr im, int x, int y, int color) -{ - int lastBorder; - int old; - int leftLimit, rightLimit; - int i; - old = gdImageGetPixel(im, x, y); - if (color == gdTiled) { - /* Tile fill -- got to watch out! */ - int p, tileColor; - int srcx, srcy; - if (!im->tile) { - return; - } - /* Refuse to flood-fill with a transparent pattern -- - I can't do it without allocating another image */ - if (gdImageGetTransparent(im->tile) != (-1)) { - return; - } - srcx = x % gdImageSX(im->tile); - srcy = y % gdImageSY(im->tile); - p = gdImageGetPixel(im->tile, srcx, srcy); - tileColor = im->tileColorMap[p]; - if (old == tileColor) { - /* Nothing to be done */ - return; - } - } else { - if (old == color) { - /* Nothing to be done */ - return; - } - } - /* Seek left */ - leftLimit = (-1); - for (i = x; (i >= 0); i--) { - if (gdImageGetPixel(im, i, y) != old) { - break; - } - gdImageSetPixel(im, i, y, color); - leftLimit = i; - } - if (leftLimit == (-1)) { - return; - } - /* Seek right */ - rightLimit = x; - for (i = (x+1); (i < im->sx); i++) { - if (gdImageGetPixel(im, i, y) != old) { - break; - } - gdImageSetPixel(im, i, y, color); - rightLimit = i; - } - /* Look at lines above and below and start paints */ - /* Above */ - if (y > 0) { - lastBorder = 1; - for (i = leftLimit; (i <= rightLimit); i++) { - int c; - c = gdImageGetPixel(im, i, y-1); - if (lastBorder) { - if (c == old) { - gdImageFill(im, i, y-1, color); - lastBorder = 0; - } - } else if (c != old) { - lastBorder = 1; - } - } - } - /* Below */ - if (y < ((im->sy) - 1)) { - lastBorder = 1; - for (i = leftLimit; (i <= rightLimit); i++) { - int c; - c = gdImageGetPixel(im, i, y+1); - if (lastBorder) { - if (c == old) { - gdImageFill(im, i, y+1, color); - lastBorder = 0; - } - } else if (c != old) { - lastBorder = 1; - } - } - } -} - -/* Code drawn from ppmtogif.c, from the pbmplus package -** -** Based on GIFENCOD by David Rowley . A -** Lempel-Zim compression based on "compress". -** -** Modified by Marcel Wijkstra -** -** Copyright (C) 1989 by Jef Poskanzer. -** -** Permission to use, copy, modify, and distribute this software and its -** documentation for any purpose and without fee is hereby granted, provided -** that the above copyright notice appear in all copies and that both that -** copyright notice and this permission notice appear in supporting -** documentation. This software is provided "as is" without express or -** implied warranty. -** -** The Graphics Interchange Format(c) is the Copyright property of -** CompuServe Incorporated. GIF(sm) is a Service Mark property of -** CompuServe Incorporated. -* -* Heavily modified by Mouse, 1998-02-12. -* Remove LZW compression. -* Added miGIF run length compression. -* -*/ - -/* - * a code_int must be able to hold 2**GIFBITS values of type int, and also -1 - */ -typedef int code_int; - -static int colorstobpp(int colors); -static void BumpPixel (void); -static int GIFNextPixel (gdImagePtr im); -static void GIFEncode (FILE *fp, int GWidth, int GHeight, int GInterlace, int Background, int Transparent, int BitsPerPixel, int *Red, int *Green, int *Blue, gdImagePtr im); -static void Putword (int w, FILE *fp); -static void compress (int, FILE *, gdImagePtr, int); -static void output (code_int code); -/* Allows for reuse */ -static void init_statics(void); - -void gdImageGif(gdImagePtr im, FILE *out) -{ - int interlace, transparent, BitsPerPixel; - interlace = im->interlace; - transparent = im->transparent; - - BitsPerPixel = colorstobpp(im->colorsTotal); - /* Clear any old values in statics strewn through the GIF code */ - init_statics(); - /* All set, let's do it. */ - GIFEncode( - out, im->sx, im->sy, interlace, 0, transparent, BitsPerPixel, - im->red, im->green, im->blue, im); -} - -static int -colorstobpp(int colors) -{ - int bpp = 0; - - if ( colors <= 2 ) - bpp = 1; - else if ( colors <= 4 ) - bpp = 2; - else if ( colors <= 8 ) - bpp = 3; - else if ( colors <= 16 ) - bpp = 4; - else if ( colors <= 32 ) - bpp = 5; - else if ( colors <= 64 ) - bpp = 6; - else if ( colors <= 128 ) - bpp = 7; - else if ( colors <= 256 ) - bpp = 8; - return bpp; - } - -/***************************************************************************** - * - * GIFENCODE.C - GIF Image compression interface - * - * GIFEncode( FName, GHeight, GWidth, GInterlace, Background, Transparent, - * BitsPerPixel, Red, Green, Blue, gdImagePtr ) - * - *****************************************************************************/ - -#define TRUE 1 -#define FALSE 0 - -static int Width, Height; -static int curx, cury; -static long CountDown; -static int Pass = 0; -static int Interlace; - -/* - * Bump the 'curx' and 'cury' to point to the next pixel - */ -static void -BumpPixel(void) -{ - /* - * Bump the current X position - */ - ++curx; - - /* - * If we are at the end of a scan line, set curx back to the beginning - * If we are interlaced, bump the cury to the appropriate spot, - * otherwise, just increment it. - */ - if( curx == Width ) { - curx = 0; - - if( !Interlace ) - ++cury; - else { - switch( Pass ) { - - case 0: - cury += 8; - if( cury >= Height ) { - ++Pass; - cury = 4; - } - break; - - case 1: - cury += 8; - if( cury >= Height ) { - ++Pass; - cury = 2; - } - break; - - case 2: - cury += 4; - if( cury >= Height ) { - ++Pass; - cury = 1; - } - break; - - case 3: - cury += 2; - break; - } - } - } -} - -/* - * Return the next pixel from the image - */ -static int -GIFNextPixel(gdImagePtr im) -{ - int r; - - if( CountDown == 0 ) - return EOF; - - --CountDown; - - r = gdImageGetPixel(im, curx, cury); - - BumpPixel(); - - return r; -} - -/* public */ - -static void -GIFEncode(FILE *fp, int GWidth, int GHeight, int GInterlace, int Background, int Transparent, int BitsPerPixel, int *Red, int *Green, int *Blue, gdImagePtr im) -{ - int B; - int RWidth, RHeight; - int LeftOfs, TopOfs; - int Resolution; - int ColorMapSize; - int InitCodeSize; - int i; - - Interlace = GInterlace; - - ColorMapSize = 1 << BitsPerPixel; - - RWidth = Width = GWidth; - RHeight = Height = GHeight; - LeftOfs = TopOfs = 0; - - Resolution = BitsPerPixel; - - /* - * Calculate number of bits we are expecting - */ - CountDown = (long)Width * (long)Height; - - /* - * Indicate which pass we are on (if interlace) - */ - Pass = 0; - - /* - * The initial code size - */ - if( BitsPerPixel <= 1 ) - InitCodeSize = 2; - else - InitCodeSize = BitsPerPixel; - - /* - * Set up the current x and y position - */ - curx = cury = 0; - - /* - * Write the Magic header - */ - fwrite( Transparent < 0 ? "GIF87a" : "GIF89a", 1, 6, fp ); - - /* - * Write out the screen width and height - */ - Putword( RWidth, fp ); - Putword( RHeight, fp ); - - /* - * Indicate that there is a global colour map - */ - B = 0x80; /* Yes, there is a color map */ - - /* - * OR in the resolution - */ - B |= (Resolution - 1) << 4; - - /* - * OR in the Bits per Pixel - */ - B |= (BitsPerPixel - 1); - - /* - * Write it out - */ - fputc( B, fp ); - - /* - * Write out the Background colour - */ - fputc( Background, fp ); - - /* - * Byte of 0's (future expansion) - */ - fputc( 0, fp ); - - /* - * Write out the Global Colour Map - */ - for( i=0; i= 0 ) { - fputc( '!', fp ); - fputc( 0xf9, fp ); - fputc( 4, fp ); - fputc( 1, fp ); - fputc( 0, fp ); - fputc( 0, fp ); - fputc( (unsigned char) Transparent, fp ); - fputc( 0, fp ); - } - - /* - * Write an Image separator - */ - fputc( ',', fp ); - - /* - * Write the Image header - */ - - Putword( LeftOfs, fp ); - Putword( TopOfs, fp ); - Putword( Width, fp ); - Putword( Height, fp ); - - /* - * Write out whether or not the image is interlaced - */ - if( Interlace ) - fputc( 0x40, fp ); - else - fputc( 0x00, fp ); - - /* - * Write out the initial code size - */ - fputc( InitCodeSize, fp ); - - /* - * Go and actually compress the data - */ - compress( InitCodeSize+1, fp, im, Background ); - - /* - * Write out a Zero-length packet (to end the series) - */ - fputc( 0, fp ); - - /* - * Write the GIF file terminator - */ - fputc( ';', fp ); -} - -/* - * Write out a word to the GIF file - */ -static void -Putword(int w, FILE *fp) -{ - fputc( w & 0xff, fp ); - fputc( (w / 256) & 0xff, fp ); -} - -#define GIFBITS 12 - -/*----------------------------------------------------------------------- - * - * miGIF Compression - mouse and ivo's GIF-compatible compression - * - * -run length encoding compression routines- - * - * Copyright (C) 1998 Hutchison Avenue Software Corporation - * http://www.hasc.com - * info@hasc.com - * - * Permission to use, copy, modify, and distribute this software and its - * documentation for any purpose and without fee is hereby granted, provided - * that the above copyright notice appear in all copies and that both that - * copyright notice and this permission notice appear in supporting - * documentation. This software is provided "AS IS." The Hutchison Avenue - * Software Corporation disclaims all warranties, either express or implied, - * including but not limited to implied warranties of merchantability and - * fitness for a particular purpose, with respect to this code and accompanying - * documentation. - * - * The miGIF compression routines do not, strictly speaking, generate files - * conforming to the GIF spec, since the image data is not LZW-compressed - * (this is the point: in order to avoid transgression of the Unisys patent - * on the LZW algorithm.) However, miGIF generates data streams that any - * reasonably sane LZW decompresser will decompress to what we want. - * - * miGIF compression uses run length encoding. It compresses horizontal runs - * of pixels of the same color. This type of compression gives good results - * on images with many runs, for example images with lines, text and solid - * shapes on a solid-colored background. It gives little or no compression - * on images with few runs, for example digital or scanned photos. - * - * der Mouse - * mouse@rodents.montreal.qc.ca - * 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B - * - * ivo@hasc.com - * - * The Graphics Interchange Format(c) is the Copyright property of - * CompuServe Incorporated. GIF(sm) is a Service Mark property of - * CompuServe Incorporated. - * - */ - -static int rl_pixel; -static int rl_basecode; -static int rl_count; -static int rl_table_pixel; -static int rl_table_max; -static int just_cleared; -static int out_bits; -static int out_bits_init; -static int out_count; -static int out_bump; -static int out_bump_init; -static int out_clear; -static int out_clear_init; -static int max_ocodes; -static int code_clear; -static int code_eof; -static unsigned int obuf; -static int obits; -static FILE *ofile; -static unsigned char oblock[256]; -static int oblen; - -/* Used only when debugging GIF compression code */ -/* #define DEBUGGING_ENVARS */ - -#ifdef DEBUGGING_ENVARS - -static int verbose_set = 0; -static int verbose; -#define VERBOSE (verbose_set?verbose:set_verbose()) - -static int set_verbose(void) -{ - verbose = !!getenv("GIF_VERBOSE"); - verbose_set = 1; - return(verbose); -} - -#else - -#define VERBOSE 0 - -#endif - - -static const char *binformat(unsigned int v, int nbits) -{ - static char bufs[8][64]; - static int bhand = 0; - unsigned int bit; - int bno; - char *bp; - - bhand --; - if (bhand < 0) bhand = (sizeof(bufs)/sizeof(bufs[0]))-1; - bp = &bufs[bhand][0]; - for (bno=nbits-1,bit=1U<=0;bno--,bit>>=1) - { *bp++ = (v & bit) ? '1' : '0'; - if (((bno&3) == 0) && (bno != 0)) *bp++ = '.'; - } - *bp = '\0'; - return(&bufs[bhand][0]); -} - -static void write_block(void) -{ - int i; - - if (VERBOSE) - { printf("write_block %d:",oblen); - for (i=0;i= 255) write_block(); -} - -static void block_flush(void) -{ - if (VERBOSE) printf("block_flush\n"); - if (oblen > 0) write_block(); -} - -static void output(int val) -{ - if (VERBOSE) printf("output %s [%s %d %d]\n",binformat(val,out_bits),binformat(obuf,obits),obits,out_bits); - obuf |= val << obits; - obits += out_bits; - while (obits >= 8) - { block_out(obuf&0xff); - obuf >>= 8; - obits -= 8; - } - if (VERBOSE) printf("output leaving [%s %d]\n",binformat(obuf,obits),obits); -} - -static void output_flush(void) -{ - if (VERBOSE) printf("output_flush\n"); - if (obits > 0) block_out(obuf); - block_flush(); -} - -static void did_clear(void) -{ - if (VERBOSE) printf("did_clear\n"); - out_bits = out_bits_init; - out_bump = out_bump_init; - out_clear = out_clear_init; - out_count = 0; - rl_table_max = 0; - just_cleared = 1; -} - -static void output_plain(int c) -{ - if (VERBOSE) printf("output_plain %s\n",binformat(c,out_bits)); - just_cleared = 0; - output(c); - out_count ++; - if (out_count >= out_bump) - { out_bits ++; - out_bump += 1 << (out_bits - 1); - } - if (out_count >= out_clear) - { output(code_clear); - did_clear(); - } -} - -static unsigned int isqrt(unsigned int x) -{ - unsigned int r; - unsigned int v; - - if (x < 2) return(x); - for (v=x,r=1;v;v>>=2,r<<=1) ; - while (1) - { v = ((x / r) + r) / 2; - if ((v == r) || (v == r+1)) return(r); - r = v; - } -} - -static unsigned int compute_triangle_count(unsigned int count, unsigned int nrepcodes) -{ - unsigned int perrep; - unsigned int ncost; - - ncost = 0; - perrep = (nrepcodes * (nrepcodes+1)) / 2; - while (count >= perrep) - { ncost += nrepcodes; - count -= perrep; - } - if (count > 0) - { unsigned int n; - n = isqrt(count); - while ((n*(n+1)) >= 2*count) n --; - while ((n*(n+1)) < 2*count) n ++; - ncost += n; - } - return(ncost); -} - -static void max_out_clear(void) -{ - out_clear = max_ocodes; -} - -static void reset_out_clear(void) -{ - out_clear = out_clear_init; - if (out_count >= out_clear) - { output(code_clear); - did_clear(); - } -} - -static void rl_flush_fromclear(int count) -{ - int n; - - if (VERBOSE) printf("rl_flush_fromclear %d\n",count); - max_out_clear(); - rl_table_pixel = rl_pixel; - n = 1; - while (count > 0) - { if (n == 1) - { rl_table_max = 1; - output_plain(rl_pixel); - count --; - } - else if (count >= n) - { rl_table_max = n; - output_plain(rl_basecode+n-2); - count -= n; - } - else if (count == 1) - { rl_table_max ++; - output_plain(rl_pixel); - count = 0; - } - else - { rl_table_max ++; - output_plain(rl_basecode+count-2); - count = 0; - } - if (out_count == 0) n = 1; else n ++; - } - reset_out_clear(); - if (VERBOSE) printf("rl_flush_fromclear leaving table_max=%d\n",rl_table_max); -} - -static void rl_flush_clearorrep(int count) -{ - int withclr; - - if (VERBOSE) printf("rl_flush_clearorrep %d\n",count); - withclr = 1 + compute_triangle_count(count,max_ocodes); - if (withclr < count) - { output(code_clear); - did_clear(); - rl_flush_fromclear(count); - } - else - { for (;count>0;count--) output_plain(rl_pixel); - } -} - -static void rl_flush_withtable(int count) -{ - int repmax; - int repleft; - int leftover; - - if (VERBOSE) printf("rl_flush_withtable %d\n",count); - repmax = count / rl_table_max; - leftover = count % rl_table_max; - repleft = (leftover ? 1 : 0); - if (out_count+repmax+repleft > max_ocodes) - { repmax = max_ocodes - out_count; - leftover = count - (repmax * rl_table_max); - repleft = 1 + compute_triangle_count(leftover,max_ocodes); - } - if (VERBOSE) printf("rl_flush_withtable repmax=%d leftover=%d repleft=%d\n",repmax,leftover,repleft); - if (1+compute_triangle_count(count,max_ocodes) < repmax+repleft) - { output(code_clear); - did_clear(); - rl_flush_fromclear(count); - return; - } - max_out_clear(); - for (;repmax>0;repmax--) output_plain(rl_basecode+rl_table_max-2); - if (leftover) - { if (just_cleared) - { rl_flush_fromclear(leftover); - } - else if (leftover == 1) - { output_plain(rl_pixel); - } - else - { output_plain(rl_basecode+leftover-2); - } - } - reset_out_clear(); -} - -static void rl_flush(void) -{ - - if (VERBOSE) printf("rl_flush [ %d %d\n",rl_count,rl_pixel); - if (rl_count == 1) - { output_plain(rl_pixel); - rl_count = 0; - if (VERBOSE) printf("rl_flush ]\n"); - return; - } - if (just_cleared) - { rl_flush_fromclear(rl_count); - } - else if ((rl_table_max < 2) || (rl_table_pixel != rl_pixel)) - { rl_flush_clearorrep(rl_count); - } - else - { rl_flush_withtable(rl_count); - } - if (VERBOSE) printf("rl_flush ]\n"); - rl_count = 0; -} - -static void compress(int init_bits, FILE *outfile, gdImagePtr im, int background) -{ - int c; - - ofile = outfile; - obuf = 0; - obits = 0; - oblen = 0; - code_clear = 1 << (init_bits - 1); - code_eof = code_clear + 1; - rl_basecode = code_eof + 1; - out_bump_init = (1 << (init_bits - 1)) - 1; - /* for images with a lot of runs, making out_clear_init larger will - give better compression. */ - out_clear_init = (init_bits <= 3) ? 9 : (out_bump_init-1); -#ifdef DEBUGGING_ENVARS - { const char *ocienv; - ocienv = getenv("GIF_OUT_CLEAR_INIT"); - if (ocienv) - { out_clear_init = atoi(ocienv); - if (VERBOSE) printf("[overriding out_clear_init to %d]\n",out_clear_init); - } - } -#endif - out_bits_init = init_bits; - max_ocodes = (1 << GIFBITS) - ((1 << (out_bits_init - 1)) + 3); - did_clear(); - output(code_clear); - rl_count = 0; - while (1) - { c = GIFNextPixel(im); - if ((rl_count > 0) && (c != rl_pixel)) rl_flush(); - if (c == EOF) break; - if (rl_pixel == c) - { rl_count ++; - } - else - { rl_pixel = c; - rl_count = 1; - } - } - output(code_eof); - output_flush(); -} - -/*----------------------------------------------------------------------- - * - * End of miGIF section - See copyright notice at start of section. - * - *----------------------------------------------------------------------- - - - ****************************************************************************** - * - * GIF Specific routines - * - ******************************************************************************/ - -/* - * Number of characters so far in this 'packet' - */ -static int a_count; - -/* - * Define the storage for the packet accumulator - */ - -static void init_statics(void) { - /* Some of these are properly initialized later. What I'm doing - here is making sure code that depends on C's initialization - of statics doesn't break when the code gets called more - than once. */ - Width = 0; - Height = 0; - curx = 0; - cury = 0; - CountDown = 0; - Pass = 0; - Interlace = 0; - a_count = 0; -} - - -/* +-------------------------------------------------------------------+ */ -/* | Copyright 1990, 1991, 1993, David Koblas. (koblas@netcom.com) | */ -/* | Permission to use, copy, modify, and distribute this software | */ -/* | and its documentation for any purpose and without fee is hereby | */ -/* | granted, provided that the above copyright notice appear in all | */ -/* | copies and that both that copyright notice and this permission | */ -/* | notice appear in supporting documentation. This software is | */ -/* | provided "as is" without express or implied warranty. | */ -/* +-------------------------------------------------------------------+ */ - - -#define MAXCOLORMAPSIZE 256 - -#define TRUE 1 -#define FALSE 0 - -#define CM_RED 0 -#define CM_GREEN 1 -#define CM_BLUE 2 - -#define MAX_LWZ_BITS 12 - -#define INTERLACE 0x40 -#define LOCALCOLORMAP 0x80 -#define BitSet(byte, bit) (((byte) & (bit)) == (bit)) - -#define ReadOK(file,buffer,len) (fread(buffer, len, 1, file) != 0) - -#define LM_to_uint(a,b) (((b)<<8)|(a)) - -/* We may eventually want to use this information, but def it out for now */ -#if 0 -static struct { - unsigned int Width; - unsigned int Height; - unsigned char ColorMap[3][MAXCOLORMAPSIZE]; - unsigned int BitPixel; - unsigned int ColorResolution; - unsigned int Background; - unsigned int AspectRatio; -} GifScreen; -#endif - -int ZeroDataBlock; - - -void gdImageRectangle(gdImagePtr im, int x1, int y1, int x2, int y2, int color) -{ - gdImageLine(im, x1, y1, x2, y1, color); - gdImageLine(im, x1, y2, x2, y2, color); - gdImageLine(im, x1, y1, x1, y2, color); - gdImageLine(im, x2, y1, x2, y2, color); -} - -void gdImageFilledRectangle(gdImagePtr im, int x1, int y1, int x2, int y2, int color) -{ - int x, y; - for (y=y1; (y<=y2); y++) { - for (x=x1; (x<=x2); x++) { - gdImageSetPixel(im, x, y, color); - } - } -} - -void gdImageCopy(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int srcY, int w, int h) -{ - int c; - int x, y; - int tox, toy; - int i; - int colorMap[gdMaxColors]; - for (i=0; (ired[c], src->green[c], - src->blue[c]); - } - if (nc == (-1)) { - /* No, so try to allocate it */ - nc = gdImageColorAllocate(dst, - src->red[c], src->green[c], - src->blue[c]); - /* If we're out of colors, go for the - closest color */ - if (nc == (-1)) { - nc = gdImageColorClosest(dst, - src->red[c], src->green[c], - src->blue[c]); - } - } - colorMap[c] = nc; - } - gdImageSetPixel(dst, tox, toy, colorMap[c]); - tox++; - } - toy++; - } -} - -void gdImageCopyResized(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int srcY, int dstW, int dstH, int srcW, int srcH) -{ - int c; - int x, y; - int tox, toy; - int ydest; - int i; - int colorMap[gdMaxColors]; - /* Stretch vectors */ - int *stx; - int *sty; - /* We only need to use floating point to determine the correct - stretch vector for one line's worth. */ - double accum; - stx = (int *) malloc(sizeof(int) * srcW); - sty = (int *) malloc(sizeof(int) * srcH); - accum = 0; - for (i=0; (i < srcW); i++) { - int got; - accum += (double)dstW/(double)srcW; - got = floor(accum); - stx[i] = got; - accum -= got; - } - accum = 0; - for (i=0; (i < srcH); i++) { - int got; - accum += (double)dstH/(double)srcH; - got = floor(accum); - sty[i] = got; - accum -= got; - } - for (i=0; (ired[c], src->green[c], - src->blue[c]); - } - if (nc == (-1)) { - /* No, so try to allocate it */ - nc = gdImageColorAllocate(dst, - src->red[c], src->green[c], - src->blue[c]); - /* If we're out of colors, go for the - closest color */ - if (nc == (-1)) { - nc = gdImageColorClosest(dst, - src->red[c], src->green[c], - src->blue[c]); - } - } - colorMap[c] = nc; - } - for (i=0; (i < stx[x - srcX]); i++) { - gdImageSetPixel(dst, tox, toy, colorMap[c]); - tox++; - } - } - toy++; - } - } - free(stx); - free(sty); -} - -int gdGetWord(int *result, FILE *in) -{ - int r; - r = getc(in); - if (r == EOF) { - return 0; - } - *result = r << 8; - r = getc(in); - if (r == EOF) { - return 0; - } - *result += r; - return 1; -} - -void gdPutWord(int w, FILE *out) -{ - putc((unsigned char)(w >> 8), out); - putc((unsigned char)(w & 0xFF), out); -} - -int gdGetByte(int *result, FILE *in) -{ - int r; - r = getc(in); - if (r == EOF) { - return 0; - } - *result = r; - return 1; -} - -gdImagePtr gdImageCreateFromGd(FILE *in) -{ - int sx, sy; - int x, y; - int i; - gdImagePtr im; - if (!gdGetWord(&sx, in)) { - goto fail1; - } - if (!gdGetWord(&sy, in)) { - goto fail1; - } - im = gdImageCreate(sx, sy); - if (!gdGetByte(&im->colorsTotal, in)) { - goto fail2; - } - if (!gdGetWord(&im->transparent, in)) { - goto fail2; - } - if (im->transparent == 257) { - im->transparent = (-1); - } - for (i=0; (ired[i], in)) { - goto fail2; - } - if (!gdGetByte(&im->green[i], in)) { - goto fail2; - } - if (!gdGetByte(&im->blue[i], in)) { - goto fail2; - } - } - for (y=0; (ypixels[y][x] = ch; - } - } - return im; -fail2: - gdImageDestroy(im); -fail1: - return 0; -} - -void gdImageGd(gdImagePtr im, FILE *out) -{ - int x, y; - int i; - int trans; - gdPutWord(im->sx, out); - gdPutWord(im->sy, out); - putc((unsigned char)im->colorsTotal, out); - trans = im->transparent; - if (trans == (-1)) { - trans = 257; - } - gdPutWord(trans, out); - for (i=0; (ired[i], out); - putc((unsigned char)im->green[i], out); - putc((unsigned char)im->blue[i], out); - } - for (y=0; (y < im->sy); y++) { - for (x=0; (x < im->sx); x++) { - /* ROW-MAJOR IN GD 1.3 */ - putc((unsigned char)im->pixels[y][x], out); - } - } -} - -gdImagePtr -gdImageCreateFromXbm(FILE *fd) -{ - gdImagePtr im; - int bit; - int w, h; - int bytes; - int ch; - int i, x, y; - char *sp; - char s[161]; - if (!fgets(s, 160, fd)) { - return 0; - } - sp = &s[0]; - /* Skip #define */ - sp = strchr(sp, ' '); - if (!sp) { - return 0; - } - /* Skip width label */ - sp++; - sp = strchr(sp, ' '); - if (!sp) { - return 0; - } - /* Get width */ - w = atoi(sp + 1); - if (!w) { - return 0; - } - if (!fgets(s, 160, fd)) { - return 0; - } - sp = s; - /* Skip #define */ - sp = strchr(sp, ' '); - if (!sp) { - return 0; - } - /* Skip height label */ - sp++; - sp = strchr(sp, ' '); - if (!sp) { - return 0; - } - /* Get height */ - h = atoi(sp + 1); - if (!h) { - return 0; - } - /* Skip declaration line */ - if (!fgets(s, 160, fd)) { - return 0; - } - bytes = (w * h / 8) + 1; - im = gdImageCreate(w, h); - gdImageColorAllocate(im, 255, 255, 255); - gdImageColorAllocate(im, 0, 0, 0); - x = 0; - y = 0; - for (i=0; (i < bytes); i++) { - char h[3]; - int b; - /* Skip spaces, commas, CRs, 0x */ - while(1) { - ch = getc(fd); - if (ch == EOF) { - goto fail; - } - if (ch == 'x') { - break; - } - } - /* Get hex value */ - ch = getc(fd); - if (ch == EOF) { - goto fail; - } - h[0] = ch; - ch = getc(fd); - if (ch == EOF) { - goto fail; - } - h[1] = ch; - h[2] = '\0'; - sscanf(h, "%x", &b); - for (bit = 1; (bit <= 128); (bit = bit << 1)) { - gdImageSetPixel(im, x++, y, (b & bit) ? 1 : 0); - if (x == im->sx) { - x = 0; - y++; - if (y == im->sy) { - return im; - } - /* Fix 8/8/95 */ - break; - } - } - } - /* Shouldn't happen */ - fprintf(stderr, "Error: bug in gdImageCreateFromXbm!\n"); - return 0; -fail: - gdImageDestroy(im); - return 0; -} - -void gdImagePolygon(gdImagePtr im, gdPointPtr p, int n, int c) -{ - int i; - int lx, ly; - if (!n) { - return; - } - lx = p->x; - ly = p->y; - gdImageLine(im, lx, ly, p[n-1].x, p[n-1].y, c); - for (i=1; (i < n); i++) { - p++; - gdImageLine(im, lx, ly, p->x, p->y, c); - lx = p->x; - ly = p->y; - } -} - -int gdCompareInt(const void *a, const void *b); - -void gdImageFilledPolygon(gdImagePtr im, gdPointPtr p, int n, int c) -{ - int i; - int y; - int y1, y2; - int ints; - if (!n) { - return; - } - if (!im->polyAllocated) { - im->polyInts = (int *) malloc(sizeof(int) * n); - im->polyAllocated = n; - } - if (im->polyAllocated < n) { - while (im->polyAllocated < n) { - im->polyAllocated *= 2; - } - im->polyInts = (int *) realloc(im->polyInts, - sizeof(int) * im->polyAllocated); - } - y1 = p[0].y; - y2 = p[0].y; - for (i=1; (i < n); i++) { - if (p[i].y < y1) { - y1 = p[i].y; - } - if (p[i].y > y2) { - y2 = p[i].y; - } - } - /* Fix in 1.3: count a vertex only once */ - for (y=y1; (y < y2); y++) { - int interLast = 0; - int dirLast = 0; - int interFirst = 1; - ints = 0; - for (i=0; (i <= n); i++) { - int x1, x2; - int y1, y2; - int dir; - int ind1, ind2; - int lastInd1 = 0; - if ((i == n) || (!i)) { - ind1 = n-1; - ind2 = 0; - } else { - ind1 = i-1; - ind2 = i; - } - y1 = p[ind1].y; - y2 = p[ind2].y; - if (y1 < y2) { - y1 = p[ind1].y; - y2 = p[ind2].y; - x1 = p[ind1].x; - x2 = p[ind2].x; - dir = -1; - } else if (y1 > y2) { - y2 = p[ind1].y; - y1 = p[ind2].y; - x2 = p[ind1].x; - x1 = p[ind2].x; - dir = 1; - } else { - /* Horizontal; just draw it */ - gdImageLine(im, - p[ind1].x, y1, - p[ind2].x, y1, - c); - continue; - } - if ((y >= y1) && (y <= y2)) { - int inter = - (y-y1) * (x2-x1) / (y2-y1) + x1; - /* Only count intersections once - except at maxima and minima. Also, - if two consecutive intersections are - endpoints of the same horizontal line - that is not at a maxima or minima, - discard the leftmost of the two. */ - if (!interFirst) { - if ((p[ind1].y == p[lastInd1].y) && - (p[ind1].x != p[lastInd1].x)) { - if (dir == dirLast) { - if (inter > interLast) { - /* Replace the old one */ - im->polyInts[ints] = inter; - } else { - /* Discard this one */ - } - continue; - } - } - if (inter == interLast) { - if (dir == dirLast) { - continue; - } - } - } - if (i > 0) { - im->polyInts[ints++] = inter; - } - lastInd1 = i; - dirLast = dir; - interLast = inter; - interFirst = 0; - } - } - qsort(im->polyInts, ints, sizeof(int), gdCompareInt); - for (i=0; (i < (ints-1)); i+=2) { - gdImageLine(im, im->polyInts[i], y, - im->polyInts[i+1], y, c); - } - } -} - -int gdCompareInt(const void *a, const void *b) -{ - return (*(const int *)a) - (*(const int *)b); -} - -void gdImageSetStyle(gdImagePtr im, int *style, int noOfPixels) -{ - if (im->style) { - free(im->style); - } - im->style = (int *) - malloc(sizeof(int) * noOfPixels); - memcpy(im->style, style, sizeof(int) * noOfPixels); - im->styleLength = noOfPixels; - im->stylePos = 0; -} - -void gdImageSetBrush(gdImagePtr im, gdImagePtr brush) -{ - int i; - im->brush = brush; - for (i=0; (i < gdImageColorsTotal(brush)); i++) { - int index; - index = gdImageColorExact(im, - gdImageRed(brush, i), - gdImageGreen(brush, i), - gdImageBlue(brush, i)); - if (index == (-1)) { - index = gdImageColorAllocate(im, - gdImageRed(brush, i), - gdImageGreen(brush, i), - gdImageBlue(brush, i)); - if (index == (-1)) { - index = gdImageColorClosest(im, - gdImageRed(brush, i), - gdImageGreen(brush, i), - gdImageBlue(brush, i)); - } - } - im->brushColorMap[i] = index; - } -} - -void gdImageSetTile(gdImagePtr im, gdImagePtr tile) -{ - int i; - im->tile = tile; - for (i=0; (i < gdImageColorsTotal(tile)); i++) { - int index; - index = gdImageColorExact(im, - gdImageRed(tile, i), - gdImageGreen(tile, i), - gdImageBlue(tile, i)); - if (index == (-1)) { - index = gdImageColorAllocate(im, - gdImageRed(tile, i), - gdImageGreen(tile, i), - gdImageBlue(tile, i)); - if (index == (-1)) { - index = gdImageColorClosest(im, - gdImageRed(tile, i), - gdImageGreen(tile, i), - gdImageBlue(tile, i)); - } - } - im->tileColorMap[i] = index; - } -} - -void gdImageInterlace(gdImagePtr im, int interlaceArg) -{ - im->interlace = interlaceArg; -} diff --git a/libraries/gd1.3/gd.dsp b/libraries/gd1.3/gd.dsp deleted file mode 100644 index 760ef0b..0000000 --- a/libraries/gd1.3/gd.dsp +++ /dev/null @@ -1,134 +0,0 @@ -# Microsoft Developer Studio Project File - Name="gd" - Package Owner=<4> -# Microsoft Developer Studio Generated Build File, Format Version 6.00 -# ** DO NOT EDIT ** - -# TARGTYPE "Win32 (x86) Static Library" 0x0104 - -CFG=gd - Win32 Debug -!MESSAGE This is not a valid makefile. To build this project using NMAKE, -!MESSAGE use the Export Makefile command and run -!MESSAGE -!MESSAGE NMAKE /f "gd.mak". -!MESSAGE -!MESSAGE You can specify a configuration when running NMAKE -!MESSAGE by defining the macro CFG on the command line. For example: -!MESSAGE -!MESSAGE NMAKE /f "gd.mak" CFG="gd - Win32 Debug" -!MESSAGE -!MESSAGE Possible choices for configuration are: -!MESSAGE -!MESSAGE "gd - Win32 Release" (based on "Win32 (x86) Static Library") -!MESSAGE "gd - Win32 Debug" (based on "Win32 (x86) Static Library") -!MESSAGE - -# Begin Project -# PROP AllowPerConfigDependencies 0 -# PROP Scc_ProjName "" -# PROP Scc_LocalPath "" -CPP=cl.exe -RSC=rc.exe - -!IF "$(CFG)" == "gd - Win32 Release" - -# PROP BASE Use_MFC 0 -# PROP BASE Use_Debug_Libraries 0 -# PROP BASE Output_Dir "Release" -# PROP BASE Intermediate_Dir "Release" -# PROP BASE Target_Dir "" -# PROP Use_MFC 0 -# PROP Use_Debug_Libraries 0 -# PROP Output_Dir "release" -# PROP Intermediate_Dir "Release" -# PROP Target_Dir "" -# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /YX /FD /c -# ADD CPP /nologo /MT /W3 /GX /O2 /I "." /I "..\libpng-1.0.3" /I "..\zlib-1.1.3" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_CTYPE_DISABLE_MACROS" /FD /c -# SUBTRACT CPP /YX -# ADD BASE RSC /l 0x100c -# ADD RSC /l 0x100c -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LIB32=link.exe -lib -# ADD BASE LIB32 /nologo -# ADD LIB32 /nologo - -!ELSEIF "$(CFG)" == "gd - Win32 Debug" - -# PROP BASE Use_MFC 0 -# PROP BASE Use_Debug_Libraries 1 -# PROP BASE Output_Dir "Debug" -# PROP BASE Intermediate_Dir "Debug" -# PROP BASE Target_Dir "" -# PROP Use_MFC 0 -# PROP Use_Debug_Libraries 1 -# PROP Output_Dir "debug" -# PROP Intermediate_Dir "Debug" -# PROP Target_Dir "" -# ADD BASE CPP /nologo /W3 /GX /Z7 /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /YX /FD /c -# ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /I "..\libpng-1.0.3" /I "..\zlib-1.1.3" /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /D "_CTYPE_DISABLE_MACROS" /FR /FD /c -# SUBTRACT CPP /YX -# ADD BASE RSC /l 0x100c -# ADD RSC /l 0x100c -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LIB32=link.exe -lib -# ADD BASE LIB32 /nologo -# ADD LIB32 /nologo - -!ENDIF - -# Begin Target - -# Name "gd - Win32 Release" -# Name "gd - Win32 Debug" -# Begin Source File - -SOURCE=.\GD.C -# End Source File -# Begin Source File - -SOURCE=.\gdfontg.c -# End Source File -# Begin Source File - -SOURCE=.\gdfontl.c -# End Source File -# Begin Source File - -SOURCE=.\GDFONTMB.C -# End Source File -# Begin Source File - -SOURCE=.\GDFONTS.C -# End Source File -# Begin Source File - -SOURCE=.\gdfontt.c -# End Source File -# Begin Source File - -SOURCE=.\gdlucidab10.c -# End Source File -# Begin Source File - -SOURCE=.\gdlucidab12.c -# End Source File -# Begin Source File - -SOURCE=.\gdlucidab14.c -# End Source File -# Begin Source File - -SOURCE=.\gdlucidan10.c -# End Source File -# Begin Source File - -SOURCE=.\gdlucidan12.c -# End Source File -# Begin Source File - -SOURCE=.\gdlucidan14.c -# End Source File -# End Target -# End Project diff --git a/libraries/gd1.3/gd.dsw b/libraries/gd1.3/gd.dsw deleted file mode 100644 index 4e5ce31..0000000 --- a/libraries/gd1.3/gd.dsw +++ /dev/null @@ -1,29 +0,0 @@ -Microsoft Developer Studio Workspace File, Format Version 6.00 -# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE! - -############################################################################### - -Project: "gd"=".\gd.dsp" - Package Owner=<4> - -Package=<5> -{{{ -}}} - -Package=<4> -{{{ -}}} - -############################################################################### - -Global: - -Package=<5> -{{{ -}}} - -Package=<3> -{{{ -}}} - -############################################################################### - diff --git a/libraries/gd1.3/gd.h b/libraries/gd1.3/gd.h deleted file mode 100644 index 3a09301..0000000 --- a/libraries/gd1.3/gd.h +++ /dev/null @@ -1,147 +0,0 @@ -#ifndef GD_H -#define GD_H 1 - -/* gd.h: declarations file for the gifdraw module. - - Written by Tom Boutell, 5/94. - Copyright 1994, Cold Spring Harbor Labs. - Permission granted to use this code in any fashion provided - that this notice is retained and any alterations are - labeled as such. It is requested, but not required, that - you share extensions to this module with us so that we - can incorporate them into new versions. */ - -/* stdio is needed for file I/O. */ -#include - -/* This can't be changed, it's part of the GIF specification. */ - -#define gdMaxColors 256 - -/* Image type. See functions below; you will not need to change - the elements directly. Use the provided macros to - access sx, sy, the color table, and colorsTotal for - read-only purposes. */ - -typedef struct gdImageStruct { - unsigned char ** pixels; - int sx; - int sy; - int colorsTotal; - int red[gdMaxColors]; - int green[gdMaxColors]; - int blue[gdMaxColors]; - int open[gdMaxColors]; - int transparent; - int *polyInts; - int polyAllocated; - struct gdImageStruct *brush; - struct gdImageStruct *tile; - int brushColorMap[gdMaxColors]; - int tileColorMap[gdMaxColors]; - int styleLength; - int stylePos; - int *style; - int interlace; -} gdImage; - -typedef gdImage * gdImagePtr; - -typedef struct { - /* # of characters in font */ - int nchars; - /* First character is numbered... (usually 32 = space) */ - int offset; - /* Character width and height */ - int w; - int h; - /* Font data; array of characters, one row after another. - Easily included in code, also easily loaded from - data files. */ - char *data; -} gdFont; - -/* Text functions take these. */ -typedef gdFont *gdFontPtr; - -/* For backwards compatibility only. Use gdImageSetStyle() - for MUCH more flexible line drawing. Also see - gdImageSetBrush(). */ -#define gdDashSize 4 - -/* Special colors. */ - -#define gdStyled (-2) -#define gdBrushed (-3) -#define gdStyledBrushed (-4) -#define gdTiled (-5) - -/* NOT the same as the transparent color index. - This is used in line styles only. */ -#define gdTransparent (-6) - -/* Functions to manipulate images. */ - -gdImagePtr gdImageCreate(int sx, int sy); -gdImagePtr gdImageCreateFromGif(FILE *fd); -gdImagePtr gdImageCreateFromGd(FILE *in); -gdImagePtr gdImageCreateFromXbm(FILE *fd); -void gdImageDestroy(gdImagePtr im); -void gdImageSetPixel(gdImagePtr im, int x, int y, int color); -int gdImageGetPixel(gdImagePtr im, int x, int y); -void gdImageLine(gdImagePtr im, int xA, int yA, int xB, int yB, int color); -/* For backwards compatibility only. Use gdImageSetStyle() - for much more flexible line drawing. */ -void gdImageDashedLine(gdImagePtr im, int xA, int yA, int xB, int yB, int color); -/* Corners specified (not width and height). Upper left first, lower right - second. */ -void gdImageRectangle(gdImagePtr im, int xA, int yA, int xB, int yB, int color); -/* Solid bar. Upper left corner first, lower right corner second. */ -void gdImageFilledRectangle(gdImagePtr im, int xA, int yA, int xB, int yB, int color); -int gdImageBoundsSafe(gdImagePtr im, int x, int y); -void gdImageChar(gdImagePtr im, gdFontPtr f, int x, int y, int c, int color); -void gdImageCharUp(gdImagePtr im, gdFontPtr f, int x, int y, int c, int color); -void gdImageString(gdImagePtr im, gdFontPtr f, int x, int y, unsigned char *s, int color); -void gdImageStringUp(gdImagePtr im, gdFontPtr f, int x, int y, unsigned char *s, int color); -void gdImageString16(gdImagePtr im, gdFontPtr f, int x, int y, unsigned short *s, int color); -void gdImageStringUp16(gdImagePtr im, gdFontPtr f, int x, int y, unsigned short *s, int color); - -/* Point type for use in polygon drawing. */ - -typedef struct { - int x, y; -} gdPoint, *gdPointPtr; - -void gdImagePolygon(gdImagePtr im, gdPointPtr p, int n, int c); -void gdImageFilledPolygon(gdImagePtr im, gdPointPtr p, int n, int c); - -int gdImageColorAllocate(gdImagePtr im, int r, int g, int b); -int gdImageColorClosest(gdImagePtr im, int r, int g, int b); -int gdImageColorExact(gdImagePtr im, int r, int g, int b); -void gdImageColorDeallocate(gdImagePtr im, int color); -void gdImageColorTransparent(gdImagePtr im, int color); -void gdImageGif(gdImagePtr im, FILE *out); -void gdImageGd(gdImagePtr im, FILE *out); -void gdImageArc(gdImagePtr im, int cx, int cy, int w, int h, int s, int e, int color); -void gdImageFillToBorder(gdImagePtr im, int x, int y, int border, int color); -void gdImageFill(gdImagePtr im, int x, int y, int color); -void gdImageCopy(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int srcY, int w, int h); -/* Stretches or shrinks to fit, as needed */ -void gdImageCopyResized(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int srcY, int dstW, int dstH, int srcW, int srcH); -void gdImageSetBrush(gdImagePtr im, gdImagePtr brush); -void gdImageSetTile(gdImagePtr im, gdImagePtr tile); -void gdImageSetStyle(gdImagePtr im, int *style, int noOfPixels); -/* On or off (1 or 0) */ -void gdImageInterlace(gdImagePtr im, int interlaceArg); - -/* Macros to access information about images. READ ONLY. Changing - these values will NOT have the desired result. */ -#define gdImageSX(im) ((im)->sx) -#define gdImageSY(im) ((im)->sy) -#define gdImageColorsTotal(im) ((im)->colorsTotal) -#define gdImageRed(im, c) ((im)->red[(c)]) -#define gdImageGreen(im, c) ((im)->green[(c)]) -#define gdImageBlue(im, c) ((im)->blue[(c)]) -#define gdImageGetTransparent(im) ((im)->transparent) -#define gdImageGetInterlaced(im) ((im)->interlace) -#endif diff --git a/libraries/gd1.3/gddemo.c b/libraries/gd1.3/gddemo.c deleted file mode 100644 index 87f0b98..0000000 --- a/libraries/gd1.3/gddemo.c +++ /dev/null @@ -1,113 +0,0 @@ -#include -#include "gd.h" -#include "gdfontg.h" -#include "gdfonts.h" - -int main(void) -{ - /* Input and output files */ - FILE *in; - FILE *out; - - /* Input and output images */ - gdImagePtr im_in, im_out; - - /* Brush image */ - gdImagePtr brush; - - /* Color indexes */ - int white; - int blue; - int red; - int green; - - /* Points for polygon */ - gdPoint points[3]; - - /* Create output image, 128 by 128 pixels. */ - im_out = gdImageCreate(128, 128); - - /* First color allocated is background. */ - white = gdImageColorAllocate(im_out, 255, 255, 255); - - /* Set transparent color. */ - gdImageColorTransparent(im_out, white); - - /* Try to load demoin.gif and paste part of it into the - output image. */ - - in = fopen("demoin.gif", "rb"); - if (!in) { - fprintf(stderr, "Can't load source image; this demo\n"); - fprintf(stderr, "is much more impressive if demoin.gif\n"); - fprintf(stderr, "is available.\n"); - im_in = 0; - } else { - im_in = gdImageCreateFromGif(in); - fclose(in); - /* Now copy, and magnify as we do so */ - gdImageCopyResized(im_out, im_in, - 16, 16, 0, 0, 96, 96, 127, 127); - } - red = gdImageColorAllocate(im_out, 255, 0, 0); - green = gdImageColorAllocate(im_out, 0, 255, 0); - blue = gdImageColorAllocate(im_out, 0, 0, 255); - /* Rectangle */ - gdImageLine(im_out, 8, 8, 120, 8, green); - gdImageLine(im_out, 120, 8, 120, 120, green); - gdImageLine(im_out, 120, 120, 8, 120, green); - gdImageLine(im_out, 8, 120, 8, 8, green); - /* Circle */ - gdImageArc(im_out, 64, 64, 30, 10, 0, 360, blue); - /* Arc */ - gdImageArc(im_out, 64, 64, 20, 20, 45, 135, blue); - /* Flood fill */ - gdImageFill(im_out, 4, 4, blue); - /* Polygon */ - points[0].x = 32; - points[0].y = 0; - points[1].x = 0; - points[1].y = 64; - points[2].x = 64; - points[2].y = 64; - gdImageFilledPolygon(im_out, points, 3, green); - /* Brush. A fairly wild example also involving a line style! */ - if (im_in) { - int style[8]; - brush = gdImageCreate(8, 8); - gdImageCopyResized(brush, im_in, - 0, 0, 0, 0, - gdImageSX(brush), gdImageSY(brush), - gdImageSX(im_in), gdImageSY(im_in)); - gdImageSetBrush(im_out, brush); - /* With a style, so they won't overprint each other. - Normally, they would, yielding a fat-brush effect. */ - style[0] = 0; - style[1] = 0; - style[2] = 0; - style[3] = 0; - style[4] = 0; - style[5] = 0; - style[6] = 0; - style[7] = 1; - gdImageSetStyle(im_out, style, 8); - /* Draw the styled, brushed line */ - gdImageLine(im_out, 0, 127, 127, 0, gdStyledBrushed); - } - /* Text */ - gdImageString(im_out, gdFontGiant, 16, 16, "hi", red); - gdImageStringUp(im_out, gdFontSmall, 32, 32, "hi", red); - /* Make output image interlaced (allows "fade in" in some viewers, - and in the latest web browsers) */ - gdImageInterlace(im_out, 1); - out = fopen("demoout.gif", "wb"); - /* Write GIF */ - gdImageGif(im_out, out); - fclose(out); - gdImageDestroy(im_out); - if (im_in) { - gdImageDestroy(im_in); - } - return 0; -} - diff --git a/libraries/gd1.3/gdfontg.c b/libraries/gd1.3/gdfontg.c deleted file mode 100644 index 2839be2..0000000 --- a/libraries/gd1.3/gdfontg.c +++ /dev/null @@ -1,4382 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -Misc-Fixed-Bold-R-Normal-Sans-15-140-75-75-C-90-ISO8859-2 - at Mon Jan 26 14:45:58 1998. - The original bdf was holding following copyright: - "Libor Skarvada, libor@informatics.muni.cz" - */ - - -#include "gdfontg.h" - -char gdFontGiantData[] = { -/* Char 0 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,1,1,1,1,0,0,0, -0,1,1,1,1,1,1,0,0, -1,1,1,1,1,1,1,1,0, -0,1,1,1,1,1,1,0,0, -0,0,1,1,1,1,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 2 */ -0,0,0,0,0,0,0,0,0, -1,0,1,0,1,0,1,0,0, -0,1,0,1,0,1,0,1,0, -1,0,1,0,1,0,1,0,0, -0,1,0,1,0,1,0,1,0, -1,0,1,0,1,0,1,0,0, -0,1,0,1,0,1,0,1,0, -1,0,1,0,1,0,1,0,0, -0,1,0,1,0,1,0,1,0, -1,0,1,0,1,0,1,0,0, -0,1,0,1,0,1,0,1,0, -1,0,1,0,1,0,1,0,0, -0,1,0,1,0,1,0,1,0, -1,0,1,0,1,0,1,0,0, -0,1,0,1,0,1,0,1,0, - -/* Char 3 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,0,1,1,0,0,0, -1,1,0,0,1,1,0,0,0, -1,1,1,1,1,1,0,0,0, -1,1,0,0,1,1,0,0,0, -1,1,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,1,1,1,1,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 4 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,1,1,1,0,0,0,0, -1,1,0,0,0,0,0,0,0, -1,1,1,1,0,0,0,0,0, -1,1,0,0,0,0,0,0,0, -1,1,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,1,1,1,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,1,1,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 5 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,1,1,1,1,0,0,0, -1,1,0,0,0,1,0,0,0, -1,1,0,0,0,0,0,0,0, -1,1,0,0,0,1,0,0,0, -0,1,1,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,1,1,1,0,0, -0,0,1,1,0,0,1,1,0, -0,0,1,1,1,1,1,0,0, -0,0,1,1,0,0,1,1,0, -0,0,1,1,0,0,1,1,0, -0,0,0,0,0,0,0,0,0, - -/* Char 6 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,0,0,0,0,0,0, -1,1,0,0,0,0,0,0,0, -1,1,0,0,0,0,0,0,0, -1,1,0,0,0,0,0,0,0, -1,1,1,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,1,1,1,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,1,1,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 7 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,1,1,0,0,0, -0,1,1,0,0,1,1,0,0, -0,1,1,0,0,1,1,0,0, -0,0,1,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 8 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -1,1,1,1,1,1,1,1,0, -1,1,1,1,1,1,1,1,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,1,1,1,1,1,1,0, -1,1,1,1,1,1,1,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 9 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,0,1,1,0,0,0, -1,1,1,0,1,1,0,0,0, -1,1,1,1,1,1,0,0,0, -1,1,0,1,1,1,0,0,0, -1,1,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,1,1,1,0, -0,0,0,0,0,0,0,0,0, - -/* Char 10 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,0,1,1,0,0,0, -1,1,0,0,1,1,0,0,0, -1,1,0,0,1,1,0,0,0, -0,1,1,1,1,0,0,0,0, -0,0,1,1,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,1,1,1,1,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 11 */ -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -1,1,1,1,1,0,0,0,0, -1,1,1,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 12 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,1,1,1,0,0,0,0, -1,1,1,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, - -/* Char 13 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,1,1,1,1, -0,0,0,1,1,1,1,1,1, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, - -/* Char 14 */ -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,1,1,1,1, -0,0,0,1,1,1,1,1,1, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 15 */ -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -1,1,1,1,1,1,1,1,1, -1,1,1,1,1,1,1,1,1, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, - -/* Char 16 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,1,1,1,1,1,1,1, -1,1,1,1,1,1,1,1,1, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 17 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,1,1,1,1,1,1,1, -1,1,1,1,1,1,1,1,1, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - 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-/* Char 242 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,1,0,0,1,1,0,0, -0,0,1,1,1,1,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,1,1,1,0,0,0, -1,1,1,0,0,1,1,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 243 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,1,1,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,1,1,0,0,0, -0,1,1,0,0,1,1,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,1,0,0, -0,0,1,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 244 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,1,1,1,1,0,0,0, -0,1,1,0,0,1,1,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,1,1,0,0,0, -0,1,1,0,0,1,1,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,1,0,0, -0,0,1,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 245 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,1,1,0, -0,0,1,1,0,1,1,0,0, -0,1,1,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,1,1,0,0,0, -0,1,1,0,0,1,1,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,1,0,0, -0,0,1,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 246 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,1,0,0,1,1,0,0, -0,1,1,0,0,1,1,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,1,1,0,0,0, -0,1,1,0,0,1,1,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,1,0,0, -0,0,1,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 247 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,1,1,1,1,1,1,0, -1,1,1,1,1,1,1,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 248 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,0,1,1,0,0, -0,0,0,1,1,1,0,0,0, -0,0,0,0,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,1,1,1,1,0,0, -0,1,1,1,0,0,1,1,0, -0,1,1,0,0,0,0,0,0, -0,1,1,0,0,0,0,0,0, -0,1,1,0,0,0,0,0,0, -0,1,1,0,0,0,0,0,0, -0,1,1,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 249 */ -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,1,0,0,1,0,0,0, -0,0,1,0,0,1,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,1,1,0, -0,0,1,1,1,0,1,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 250 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,1,1,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,1,1,0, -0,0,1,1,1,0,1,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 251 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,1,1,0, -0,0,1,1,0,1,1,0,0, -0,1,1,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,1,1,0, -0,0,1,1,1,0,1,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 252 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,1,0,0,1,1,0,0, -0,1,1,0,0,1,1,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,1,1,0, -0,0,1,1,1,0,1,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 253 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,1,1,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -1,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,1,1,0, -0,0,1,1,1,0,1,1,0, -1,0,0,0,0,0,1,1,0, -0,1,1,1,1,1,1,0,0, - -/* Char 254 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,0,0,0,0,0, -0,0,1,1,0,0,0,0,0, -1,1,1,1,1,1,0,0,0, -0,0,1,1,0,0,0,0,0, -0,0,1,1,0,0,0,0,0, -0,0,1,1,0,0,0,0,0, -0,0,1,1,0,0,0,0,0, -0,0,1,1,0,0,1,1,0, -0,0,0,1,1,1,1,0,0, -0,0,0,0,1,1,0,0,0, -0,0,1,1,1,0,0,0,0, - -/* Char 255 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - - -}; - -gdFont gdFontGiantRep = { - 256, - 0, - 9, - 15, - gdFontGiantData -}; - -gdFontPtr gdFontGiant = &gdFontGiantRep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdfontg.h b/libraries/gd1.3/gdfontg.h deleted file mode 100644 index 965f6c7..0000000 --- a/libraries/gd1.3/gdfontg.h +++ /dev/null @@ -1,21 +0,0 @@ - -#ifndef _GDFONTG_H_ -#define _GDFONTG_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -Misc-Fixed-Bold-R-Normal-Sans-15-140-75-75-C-90-ISO8859-2 - at Mon Jan 26 14:45:58 1998. - The original bdf was holding following copyright: - "Libor Skarvada, libor@informatics.muni.cz" - */ - - -#include "gd.h" - -extern gdFontPtr gdFontGiant; - -#endif - diff --git a/libraries/gd1.3/gdfontl.c b/libraries/gd1.3/gdfontl.c deleted file mode 100644 index 913780c..0000000 --- a/libraries/gd1.3/gdfontl.c +++ /dev/null @@ -1,4639 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.5 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -misc-fixed-medium-r-normal--16-140-75-75-c-80-iso8859-2 - at Tue Jan 6 19:39:27 1998. - - The original bdf was holding following copyright: - "Libor Skarvada, libor@informatics.muni.cz" - */ - - -#include "gdfontl.h" - -char gdFontLargeData[] = { -/* Char 0 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,1,1,1,0,0,0, -0,1,1,1,1,1,0,0, -1,1,1,1,1,1,1,0, -1,1,1,1,1,1,1,0, -0,1,1,1,1,1,0,0, -0,0,1,1,1,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 2 */ -1,0,1,0,1,0,1,0, -0,1,0,1,0,1,0,1, -1,0,1,0,1,0,1,0, -0,1,0,1,0,1,0,1, -1,0,1,0,1,0,1,0, -0,1,0,1,0,1,0,1, -1,0,1,0,1,0,1,0, -0,1,0,1,0,1,0,1, -1,0,1,0,1,0,1,0, -0,1,0,1,0,1,0,1, -1,0,1,0,1,0,1,0, -0,1,0,1,0,1,0,1, -1,0,1,0,1,0,1,0, -0,1,0,1,0,1,0,1, -1,0,1,0,1,0,1,0, -0,1,0,1,0,1,0,1, - -/* Char 3 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -1,0,0,0,1,0,0,0, -1,0,0,0,1,0,0,0, -1,1,1,1,1,0,0,0, -1,0,0,0,1,0,0,0, -1,0,0,0,1,0,0,0, -0,0,0,0,0,0,0,0, -0,0,1,1,1,1,1,0, -0,0,0,0,1,0,0,0, -0,0,0,0,1,0,0,0, -0,0,0,0,1,0,0,0, -0,0,0,0,1,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 4 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -1,1,1,1,0,0,0,0, -1,0,0,0,0,0,0,0, -1,1,1,0,0,0,0,0, -1,0,0,0,0,0,0,0, -1,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,1,1,1,0, -0,0,0,1,0,0,0,0, -0,0,0,1,1,1,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 5 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,1,1,1,0,0,0,0, -1,0,0,0,0,0,0,0, -1,0,0,0,0,0,0,0, -1,0,0,0,0,0,0,0, -0,1,1,1,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,1,1,0,0, -0,0,0,1,0,0,1,0, -0,0,0,1,1,1,0,0, -0,0,0,1,0,1,0,0, -0,0,0,1,0,0,1,0, -0,0,0,0,0,0,0,0, - -/* Char 6 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -1,0,0,0,0,0,0,0, -1,0,0,0,0,0,0,0, -1,0,0,0,0,0,0,0, -1,0,0,0,0,0,0,0, -1,1,1,1,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,1,1,1,0, -0,0,0,1,0,0,0,0, -0,0,0,1,1,1,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 7 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0, -0,0,1,0,0,1,0,0, -0,0,1,0,0,1,0,0, -0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 8 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,1,1,1,1,1,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,0,0,0,0,0, -0,1,1,1,1,1,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 9 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -1,0,0,0,1,0,0,0, -1,1,0,0,1,0,0,0, -1,0,1,0,1,0,0,0, -1,0,0,1,1,0,0,0, -1,0,0,0,1,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,1,1,1,0, -0,0,0,0,0,0,0,0, - -/* Char 10 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -1,0,0,0,1,0,0,0, -1,0,0,0,1,0,0,0, -0,1,0,1,0,0,0,0, -0,1,0,1,0,0,0,0, -0,0,1,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,1,1,1,1,1,0, -0,0,0,0,1,0,0,0, -0,0,0,0,1,0,0,0, -0,0,0,0,1,0,0,0, -0,0,0,0,1,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 11 */ -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -1,1,1,1,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 12 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -1,1,1,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, - -/* Char 13 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,1,1,1,1, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, - -/* Char 14 */ -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,1,1,1,1, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 15 */ -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -1,1,1,1,1,1,1,1, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, - -/* Char 16 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -1,1,1,1,1,1,1,1, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - 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-/* Char 245 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,1,0,0,1, -0,0,0,1,0,0,1,0, -0,0,1,0,0,1,0,0, -0,0,0,0,0,0,0,0, -0,0,1,1,1,1,0,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,0,1,1,1,1,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 246 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,1,0,0,1,0,0, -0,0,1,0,0,1,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,1,1,1,1,0,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,0,1,1,1,1,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 247 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,1,1,1,1,1,1,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 248 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,1,0,0,1,0,0, -0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0, -0,1,0,1,1,1,0,0, -0,1,1,0,0,0,1,0, -0,1,0,0,0,0,0,0, -0,1,0,0,0,0,0,0, -0,1,0,0,0,0,0,0, -0,1,0,0,0,0,0,0, -0,1,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 249 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0, -0,0,1,0,0,1,0,0, -0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,1,1,0, -0,0,1,1,1,0,1,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 250 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,1,0,0, -0,0,0,0,1,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,0,0,0,0,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,1,1,0, -0,0,1,1,1,0,1,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 251 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,1,0,0,1, -0,0,0,1,0,0,1,0, -0,0,1,0,0,1,0,0, -0,0,0,0,0,0,0,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,1,1,0, -0,0,1,1,1,0,1,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 252 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,1,0,0,1,0,0, -0,0,1,0,0,1,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,1,1,0, -0,0,1,1,1,0,1,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - -/* Char 253 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,1,0,0, -0,0,0,0,1,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,0,0,0,0,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,1,0,0,0,0,1,0, -0,0,1,0,0,1,1,0, -0,0,0,1,1,0,1,0, -0,0,0,0,0,0,1,0, -0,0,0,0,0,1,0,0, -0,0,1,1,1,0,0,0, - -/* Char 254 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,1,1,1,1,1,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0, -0,0,0,1,0,0,1,0, -0,0,0,0,1,1,0,0, -0,0,0,0,1,0,0,0, -0,0,0,0,1,0,0,0, -0,0,0,1,0,0,0,0, - -/* Char 255 */ -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,1,1,0,0,0, -0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0, - - -}; - -gdFont gdFontLargeRep = { - 256, - 0, - 8, - 16, - gdFontLargeData -}; - -gdFontPtr gdFontLarge = &gdFontLargeRep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdfontl.h b/libraries/gd1.3/gdfontl.h deleted file mode 100644 index d94c9d6..0000000 --- a/libraries/gd1.3/gdfontl.h +++ /dev/null @@ -1,22 +0,0 @@ - -#ifndef _GDFONTL_H_ -#define _GDFONTL_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.5 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -misc-fixed-medium-r-normal--16-140-75-75-c-80-iso8859-2 - at Tue Jan 6 19:39:27 1998. - - The original bdf was holding following copyright: - "Libor Skarvada, libor@informatics.muni.cz" - */ - - -#include "gd.h" - -extern gdFontPtr gdFontLarge; - -#endif - diff --git a/libraries/gd1.3/gdfontmb.c b/libraries/gd1.3/gdfontmb.c deleted file mode 100644 index bec7427..0000000 --- a/libraries/gd1.3/gdfontmb.c +++ /dev/null @@ -1,3869 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.5 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -misc-fixed-bold-r-normal-sans-13-94-100-100-c-70-iso8859-2 - at Thu Jan 8 13:54:57 1998. - No copyright info was found in the original bdf. - */ - - -#include "gdfontmb.h" - -char gdFontMediumBoldData[] = { -/* Char 0 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,0,0,0, -0,1,1,1,1,0,0, -1,1,1,1,1,1,0, -0,1,1,1,1,0,0, -0,0,1,1,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 2 */ -0,0,0,0,0,0,0, -1,1,0,0,1,1,0, -0,0,1,1,0,0,0, -1,1,0,0,1,1,0, -0,0,1,1,0,0,0, -1,1,0,0,1,1,0, -0,0,1,1,0,0,0, -1,1,0,0,1,1,0, -0,0,1,1,0,0,0, -1,1,0,0,1,1,0, -0,0,1,1,0,0,0, -1,1,0,0,1,1,0, -0,0,0,0,0,0,0, - -/* Char 3 */ -0,0,0,0,0,0,0, -1,1,0,1,1,0,0, -1,1,0,1,1,0,0, -1,1,1,1,1,0,0, -1,1,0,1,1,0,0, -1,1,0,1,1,0,0, -0,0,0,0,0,0,0, -0,0,1,1,1,1,0, -0,0,0,1,1,0,0, -0,0,0,1,1,0,0, -0,0,0,1,1,0,0, -0,0,0,1,1,0,0, -0,0,0,0,0,0,0, - -/* Char 4 */ -0,0,0,0,0,0,0, -1,1,1,1,0,0,0, -1,1,0,0,0,0,0, -1,1,1,0,0,0,0, -1,1,0,0,0,0,0, -1,1,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,1,1,0, -0,0,1,1,0,0,0, -0,0,1,1,1,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,0,0,0,0,0, - -/* Char 5 */ -0,0,0,0,0,0,0, -0,1,1,1,0,0,0, -1,1,0,0,0,0,0, -1,1,0,0,0,0,0, -1,1,0,0,0,0,0, -0,1,1,1,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,1,0,0, -0,0,1,1,0,1,0, -0,0,1,1,1,0,0, -0,0,1,1,0,1,0, -0,0,1,1,0,1,0, -0,0,0,0,0,0,0, - -/* Char 6 */ -0,0,0,0,0,0,0, -1,1,0,0,0,0,0, -1,1,0,0,0,0,0, -1,1,0,0,0,0,0, -1,1,0,0,0,0,0, -1,1,1,1,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,1,1,0, -0,0,1,1,0,0,0, -0,0,1,1,1,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,0,0,0,0,0, - -/* Char 7 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,1,1,1,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 8 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -1,1,1,1,1,1,0, -1,1,1,1,1,1,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,1,0, -1,1,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 9 */ -0,0,0,0,0,0,0, -1,1,0,0,1,1,0, -1,1,1,0,1,1,0, -1,1,1,1,1,1,0, -1,1,0,1,1,1,0, -1,1,0,0,1,1,0, -0,0,0,0,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,1,1,0, -0,0,0,0,0,0,0, - -/* Char 10 */ -0,0,0,0,0,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,0,0,1,0,0, -0,1,1,1,1,0,0, -0,0,1,1,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,1,1,0, -0,0,0,1,1,0,0, -0,0,0,1,1,0,0, -0,0,0,1,1,0,0, -0,0,0,1,1,0,0, -0,0,0,0,0,0,0, - -/* Char 11 */ -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -1,1,1,1,0,0,0, -1,1,1,1,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 12 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,0,0,0, -1,1,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, - -/* Char 13 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,1,1,1, -0,0,1,1,1,1,1, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, - -/* Char 14 */ -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,1,1,1, -0,0,1,1,1,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 15 */ -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -1,1,1,1,1,1,1, -1,1,1,1,1,1,1, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, - -/* Char 16 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,1,1, -1,1,1,1,1,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 17 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,1,1, -1,1,1,1,1,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 18 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,1,1, -1,1,1,1,1,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 19 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,1,1, -1,1,1,1,1,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 20 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,1,1, -1,1,1,1,1,1,1, -0,0,0,0,0,0,0, - -/* Char 21 */ -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,1,1,1, -0,0,1,1,1,1,1, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, - -/* Char 22 */ -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -1,1,1,1,0,0,0, -1,1,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, - -/* Char 23 */ -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -1,1,1,1,1,1,1, -1,1,1,1,1,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - 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-/* Char 239 */ -0,0,0,0,0,0,0, -0,0,0,0,0,1,1, -0,0,0,1,1,0,1, -0,0,0,1,1,1,0, -0,0,0,1,1,0,0, -0,1,1,1,1,0,0, -1,1,0,1,1,0,0, -1,1,0,1,1,0,0, -1,1,0,1,1,0,0, -1,1,0,1,1,0,0, -0,1,1,1,1,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 240 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,1,1,0, -0,0,0,1,1,1,1, -0,0,0,0,1,1,0, -0,1,1,1,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 241 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,1,1,1,0, -0,1,1,1,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 242 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,1,0,1,1,0, -0,0,1,1,1,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 243 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,1,1,1,0, -0,1,1,1,0,0,0, -0,0,0,0,0,0,0, -0,1,1,1,1,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 244 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,1,0,0, -0,1,1,0,1,1,0, -0,0,0,0,0,0,0, -0,1,1,1,1,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 245 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,1,0,0,1,1, -1,1,0,0,1,1,0, -0,0,0,0,0,0,0, -0,1,1,1,1,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 246 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,1,0,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,1,1,1,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 247 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 248 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,1,0,1,1,0, -0,0,1,1,1,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,0,0, -1,1,0,0,1,1,0, -1,1,0,0,0,0,0, -1,1,0,0,0,0,0, -1,1,0,0,0,0,0, -1,1,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 249 */ -0,0,0,0,0,0,0, -0,0,1,1,0,0,0, -0,1,0,0,1,0,0, -0,0,1,1,0,0,0, -0,0,0,0,0,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 250 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,1,1,1,0, -0,1,1,1,0,0,0, -0,0,0,0,0,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 251 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,1,0,0,1,1, -1,1,0,0,1,1,0, -0,0,0,0,0,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 252 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -1,1,0,0,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 253 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,1,1,1,0, -0,1,1,1,0,0,0, -0,0,0,0,0,0,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -1,1,0,0,1,1,0, -0,1,1,1,1,1,0, -0,0,0,0,1,1,0, -0,0,0,0,1,1,0, -0,1,1,1,1,0,0, - -/* Char 254 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,1,0,0,0,0, -0,1,1,0,0,0,0, -1,1,1,1,1,0,0, -0,1,1,0,0,0,0, -0,1,1,0,0,0,0, -0,1,1,0,0,0,0, -0,1,1,0,1,1,0, -0,0,1,1,1,0,0, -0,0,1,1,0,0,0, -0,1,1,0,0,0,0, - -/* Char 255 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,1,1,0,0,0, -0,0,1,1,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - - -}; - -gdFont gdFontMediumBoldRep = { - 256, - 0, - 7, - 13, - gdFontMediumBoldData -}; - -gdFontPtr gdFontMediumBold = &gdFontMediumBoldRep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdfontmb.h b/libraries/gd1.3/gdfontmb.h deleted file mode 100644 index 60fac8f..0000000 --- a/libraries/gd1.3/gdfontmb.h +++ /dev/null @@ -1,20 +0,0 @@ - -#ifndef _GDFONTMB_H_ -#define _GDFONTMB_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.5 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -misc-fixed-bold-r-normal-sans-13-94-100-100-c-70-iso8859-2 - at Thu Jan 8 13:54:57 1998. - No copyright info was found in the original bdf. - */ - - -#include "gd.h" - -extern gdFontPtr gdFontMediumBold; - -#endif - diff --git a/libraries/gd1.3/gdfonts.c b/libraries/gd1.3/gdfonts.c deleted file mode 100644 index 9345590..0000000 --- a/libraries/gd1.3/gdfonts.c +++ /dev/null @@ -1,3869 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.5 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -misc-fixed-medium-r-semicondensed-sans-12-116-75-75-c-60-iso8859-2 - at Thu Jan 8 14:13:20 1998. - No copyright info was found in the original bdf. - */ - - -#include "gdfonts.h" - -char gdFontSmallData[] = { -/* Char 0 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,1,0,0,0, -0,1,1,1,0,0, -1,1,1,1,1,0, -0,1,1,1,0,0, -0,0,1,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 2 */ -0,0,0,0,0,0, -0,1,0,1,0,1, -1,0,1,0,1,0, -0,1,0,1,0,1, -1,0,1,0,1,0, -0,1,0,1,0,1, -1,0,1,0,1,0, -0,1,0,1,0,1, -1,0,1,0,1,0, -0,1,0,1,0,1, -1,0,1,0,1,0, -0,1,0,1,0,1, -1,0,1,0,1,0, - -/* Char 3 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -1,0,1,0,0,0, -1,0,1,0,0,0, -1,1,1,0,0,0, -1,0,1,0,0,0, -1,0,1,0,0,0, -0,0,1,1,1,0, -0,0,0,1,0,0, -0,0,0,1,0,0, -0,0,0,1,0,0, -0,0,0,0,0,0, - -/* Char 4 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -1,1,1,0,0,0, -1,0,0,0,0,0, -1,1,0,0,0,0, -1,0,0,0,0,0, -1,0,1,1,1,0, -0,0,1,0,0,0, -0,0,1,1,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,0,0,0,0, - -/* Char 5 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,1,1,1,0,0, -1,0,0,0,0,0, -1,0,0,0,0,0, -0,1,1,1,0,0, -0,1,1,1,0,0, -0,1,0,0,1,0, -0,1,1,1,0,0, -0,1,0,1,0,0, -0,1,0,0,1,0, -0,0,0,0,0,0, - -/* Char 6 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -1,0,0,0,0,0, -1,0,0,0,0,0, -1,0,0,0,0,0, -1,1,1,0,0,0, -0,0,1,1,1,0, -0,0,1,0,0,0, -0,0,1,1,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,0,0,0,0, - -/* Char 7 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,1,1,0,0,0, -1,0,0,1,0,0, -1,0,0,1,0,0, -0,1,1,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 8 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -1,1,1,1,1,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,0,0,0,0, -1,1,1,1,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 9 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -1,0,0,0,1,0, -1,1,0,0,1,0, -1,0,1,0,1,0, -1,0,0,1,1,0, -1,0,0,0,1,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,1,1,1, -0,0,0,0,0,0, - -/* Char 10 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -1,0,0,0,1,0, -1,0,0,0,1,0, -0,1,0,1,0,0, -0,0,1,0,0,0, -0,0,0,0,0,0, -1,1,1,1,1,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,0,0,0,0, - -/* Char 11 */ -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -1,1,1,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 12 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -1,1,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, - -/* Char 13 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,1,1,1,1, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, - 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-/* Char 254 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,1,0,0,0,0, -0,1,0,0,0,0, -1,1,1,1,0,0, -0,1,0,0,0,0, -0,1,0,0,0,0, -0,1,0,0,0,0, -0,1,0,0,1,0, -0,0,1,1,0,0, -0,0,0,1,0,0, -0,0,1,0,0,0, - -/* Char 255 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,1,0,0,0, -0,0,1,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - - -}; - -gdFont gdFontSmallRep = { - 256, - 0, - 6, - 13, - gdFontSmallData -}; - -gdFontPtr gdFontSmall = &gdFontSmallRep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdfonts.h b/libraries/gd1.3/gdfonts.h deleted file mode 100644 index 43f8ae4..0000000 --- a/libraries/gd1.3/gdfonts.h +++ /dev/null @@ -1,20 +0,0 @@ - -#ifndef _GDFONTS_H_ -#define _GDFONTS_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.5 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -misc-fixed-medium-r-semicondensed-sans-12-116-75-75-c-60-iso8859-2 - at Thu Jan 8 14:13:20 1998. - No copyright info was found in the original bdf. - */ - - -#include "gd.h" - -extern gdFontPtr gdFontSmall; - -#endif - diff --git a/libraries/gd1.3/gdfontt.c b/libraries/gd1.3/gdfontt.c deleted file mode 100644 index 4494767..0000000 --- a/libraries/gd1.3/gdfontt.c +++ /dev/null @@ -1,2590 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.5 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -Misc-Fixed-Medium-R-Normal--8-80-75-75-C-50-ISO8859-2 - at Thu Jan 8 13:49:54 1998. - The original bdf was holding following copyright: - "Libor Skarvada, libor@informatics.muni.cz" - */ - - -#include "gdfontt.h" - -char gdFontTinyData[] = { -/* Char 0 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0, -0,0,1,0,0, -0,1,1,1,0, -1,1,1,1,1, -0,1,1,1,0, -0,0,1,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 2 */ -0,1,0,1,0, -1,0,1,0,0, -0,1,0,1,0, -1,0,1,0,0, -0,1,0,1,0, -1,0,1,0,0, -0,1,0,1,0, -1,0,1,0,0, - -/* Char 3 */ -0,1,0,1,0, -0,1,0,1,0, -0,1,1,1,0, -0,1,0,1,0, -0,1,0,1,0, -0,0,1,1,1, -0,0,0,1,0, -0,0,0,1,0, - -/* Char 4 */ -1,1,1,0,0, -1,0,0,0,0, -1,1,0,0,0, -1,0,1,1,1, -1,0,1,0,0, -0,0,1,1,0, -0,0,1,0,0, -0,0,1,0,0, - -/* Char 5 */ -0,1,1,0,0, -1,0,0,0,0, -0,1,1,0,0, -0,0,0,0,0, -0,0,1,1,0, -0,0,1,0,1, -0,0,1,1,0, -0,0,1,0,1, - -/* Char 6 */ -1,0,0,0,0, -1,0,0,0,0, -1,0,0,0,0, -1,1,1,0,0, -0,0,1,1,1, -0,0,1,0,0, -0,0,1,1,0, -0,0,1,0,0, - -/* Char 7 */ -0,0,0,0,0, -0,1,0,0,0, -1,0,1,0,0, -0,1,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 8 */ -0,0,0,0,0, -0,0,1,0,0, -0,1,1,1,0, -0,0,1,0,0, -0,0,0,0,0, -0,1,1,1,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 9 */ -1,0,0,1,0, -1,1,0,1,0, -1,0,1,1,0, -1,0,0,1,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,1,1, - -/* Char 10 */ -1,0,1,0,0, -1,0,1,0,0, -1,0,1,0,0, -0,1,0,0,0, -0,0,1,1,1, -0,0,0,1,0, -0,0,0,1,0, -0,0,0,1,0, - -/* Char 11 */ -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -1,1,1,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 12 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -1,1,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, - -/* Char 13 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,1,1,1, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, - -/* Char 14 */ -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,1,1, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 15 */ -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -1,1,1,1,1, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, - -/* Char 16 */ -0,0,0,0,0, -1,1,1,1,1, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 17 */ -0,0,0,0,0, -0,0,0,0,0, -1,1,1,1,1, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 18 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -1,1,1,1,1, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 19 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -1,1,1,1,1, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 20 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -1,1,1,1,1, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 21 */ -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,1,1, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, - -/* Char 22 */ -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -1,1,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, - -/* Char 23 */ -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -1,1,1,1,1, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 24 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -1,1,1,1,1, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, - -/* Char 25 */ -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, - -/* Char 26 */ -0,0,0,0,0, -0,0,0,1,0, -0,0,1,0,0, -0,1,0,0,0, -0,0,1,0,0, -0,0,0,1,0, -0,1,1,1,0, -0,0,0,0,0, - -/* Char 27 */ -0,0,0,0,0, -0,1,0,0,0, -0,0,1,0,0, -0,0,0,1,0, -0,0,1,0,0, -0,1,0,0,0, -0,1,1,1,0, -0,0,0,0,0, - -/* Char 28 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -1,1,1,1,1, -0,1,0,1,0, -0,1,0,1,0, -0,1,0,1,0, -0,0,0,0,0, - -/* Char 29 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,1,0, -1,1,1,1,1, -0,0,1,0,0, -1,1,1,1,1, -0,1,0,0,0, -0,0,0,0,0, - -/* Char 30 */ -0,0,0,0,0, -0,0,1,1,0, -0,1,0,0,1, -1,1,1,0,0, -0,1,0,0,0, -0,1,0,0,1, -1,0,1,1,0, -0,0,0,0,0, - -/* Char 31 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,1,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 32 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 33 */ -0,0,0,0,0, -0,0,0,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,1,0,0, -0,0,0,0,0, -0,0,1,0,0, -0,0,0,0,0, - -/* Char 34 */ -0,0,0,0,0, -0,1,0,1,0, -0,1,0,1,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - -/* Char 35 */ -0,1,0,1,0, -0,1,0,1,0, -1,1,1,1,1, -0,1,0,1,0, -1,1,1,1,1, -0,1,0,1,0, -0,1,0,1,0, -0,0,0,0,0, - -/* Char 36 */ -0,0,1,0,0, -0,1,1,1,0, -1,0,1,0,0, -0,1,1,1,0, -0,0,1,0,1, -0,1,1,1,0, -0,0,1,0,0, -0,0,0,0,0, - -/* Char 37 */ -0,0,0,0,0, -0,0,0,0,0, -1,1,0,0,1, -1,1,0,1,0, -0,0,1,0,0, -0,1,0,1,1, -1,0,0,1,1, -0,0,0,0,0, - -/* Char 38 */ -0,0,0,0,0, -0,0,1,0,0, -0,1,0,1,0, -0,0,1,0,0, -0,1,0,1,0, -0,1,0,1,0, -0,0,1,0,1, -0,0,0,0,0, - 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-/* Char 246 */ -1,0,0,1,0, -0,0,0,0,0, -0,0,0,0,0, -0,1,1,0,0, -1,0,0,1,0, -1,0,0,1,0, -0,1,1,0,0, -0,0,0,0,0, - -/* Char 247 */ -0,0,0,0,0, -0,0,0,0,0, -0,1,1,0,0, -0,0,0,0,0, -1,1,1,1,0, -0,0,0,0,0, -0,1,1,0,0, -0,0,0,0,0, - -/* Char 248 */ -0,1,0,1,0, -0,0,1,0,0, -0,0,0,0,0, -1,0,1,0,0, -1,1,0,1,0, -1,0,0,0,0, -1,0,0,0,0, -0,0,0,0,0, - -/* Char 249 */ -0,1,1,0,0, -0,1,1,0,0, -0,0,0,0,0, -1,0,0,1,0, -1,0,0,1,0, -1,0,1,1,0, -0,1,0,1,0, -0,0,0,0,0, - -/* Char 250 */ -0,0,0,1,0, -0,0,1,0,0, -0,0,0,0,0, -1,0,0,1,0, -1,0,0,1,0, -1,0,1,1,0, -0,1,0,1,0, -0,0,0,0,0, - -/* Char 251 */ -0,1,0,0,1, -1,0,0,1,0, -0,0,0,0,0, -1,0,0,1,0, -1,0,0,1,0, -1,0,1,1,0, -0,1,0,1,0, -0,0,0,0,0, - -/* Char 252 */ -1,0,0,1,0, -0,0,0,0,0, -0,0,0,0,0, -1,0,0,1,0, -1,0,0,1,0, -1,0,1,1,0, -0,1,0,1,0, -0,0,0,0,0, - -/* Char 253 */ -0,0,0,1,0, -0,0,1,0,0, -0,0,0,0,0, -1,0,0,1,0, -1,0,0,1,0, -0,1,1,1,0, -0,0,0,1,0, -0,1,1,0,0, - -/* Char 254 */ -0,0,0,0,0, -0,1,0,0,0, -0,1,0,0,0, -1,1,1,0,0, -0,1,0,0,0, -0,1,0,1,0, -0,0,1,0,0, -0,1,1,0,0, - -/* Char 255 */ -0,0,0,0,0, -0,0,1,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, -0,0,0,0,0, - - -}; - -gdFont gdFontTinyRep = { - 256, - 0, - 5, - 8, - gdFontTinyData -}; - -gdFontPtr gdFontTiny = &gdFontTinyRep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdfontt.h b/libraries/gd1.3/gdfontt.h deleted file mode 100644 index 00543d1..0000000 --- a/libraries/gd1.3/gdfontt.h +++ /dev/null @@ -1,21 +0,0 @@ - -#ifndef _GDFONTT_H_ -#define _GDFONTT_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.5 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -Misc-Fixed-Medium-R-Normal--8-80-75-75-C-50-ISO8859-2 - at Thu Jan 8 13:49:54 1998. - The original bdf was holding following copyright: - "Libor Skarvada, libor@informatics.muni.cz" - */ - - -#include "gd.h" - -extern gdFontPtr gdFontTiny; - -#endif - diff --git a/libraries/gd1.3/gdlucidab10.c b/libraries/gd1.3/gdlucidab10.c deleted file mode 100644 index 4dc993b..0000000 --- a/libraries/gd1.3/gdlucidab10.c +++ /dev/null @@ -1,3358 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Bold-R-Normal-Sans-10-100-75-75-M-60-ISO8859-1 - at Tue Jul 13 15:36:06 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gdlucidab10.h" - -char gdLucidaBold10Data[] = { -/* Char 0 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 2 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 3 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 4 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 5 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 6 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 7 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 8 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 9 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 10 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 11 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 12 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 13 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 14 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 15 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - 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-/* Char 238 */ -0,0,0,1,1,0, -0,0,1,0,1,1, -0,0,0,0,0,0, -0,1,1,1,1,0, -0,0,0,1,1,0, -0,0,0,1,1,0, -0,0,0,1,1,0, -0,0,0,1,1,0, -0,0,0,1,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 239 */ -0,0,1,0,1,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,1,1,1,1,0, -0,0,0,1,1,0, -0,0,0,1,1,0, -0,0,0,1,1,0, -0,0,0,1,1,0, -0,0,0,1,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 240 */ -0,0,0,0,0,0, -1,1,1,0,1,1, -0,0,1,1,0,0, -0,1,0,1,1,0, -0,0,1,1,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 241 */ -0,0,1,1,0,1, -0,1,0,1,1,0, -0,0,0,0,0,0, -0,1,0,1,1,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 242 */ -0,0,1,1,0,0, -0,0,0,1,1,0, -0,0,0,0,0,0, -0,0,1,1,1,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 243 */ -0,0,0,1,1,0, -0,0,1,1,0,0, -0,0,0,0,0,0, -0,0,1,1,1,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 244 */ -0,0,0,1,1,0, -0,0,1,0,1,1, -0,0,0,0,0,0, -0,0,1,1,1,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 245 */ -0,0,1,1,0,1, -0,1,0,1,1,0, -0,0,0,0,0,0, -0,0,1,1,1,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 246 */ -0,0,1,0,1,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,0,1,1,1,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 247 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,1,0,0, -0,0,0,0,0,0, -0,1,1,1,1,1, -0,0,0,0,0,0, -0,0,0,1,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 248 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,1, -0,0,1,1,1,0, -0,1,1,0,1,1, -0,1,1,1,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,1,0, -0,1,0,0,0,0, -0,0,0,0,0,0, - -/* Char 249 */ -0,0,1,1,0,0, -0,0,0,1,1,0, -0,0,0,0,0,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,0,1, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 250 */ -0,0,0,1,1,0, -0,0,1,1,0,0, -0,0,0,0,0,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,0,1, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 251 */ -0,0,0,1,1,0, -0,0,1,0,1,1, -0,0,0,0,0,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,0,1, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 252 */ -0,0,1,0,1,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,0,1,1,0,1, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 253 */ -0,0,0,0,1,1, -0,0,0,1,1,0, -0,0,0,0,0,0, -0,1,1,0,0,1, -0,1,1,0,0,1, -0,1,1,0,1,1, -0,0,1,0,1,0, -0,0,1,1,1,0, -0,0,0,1,1,0, -0,0,0,1,0,0, -0,0,1,1,0,0, - -/* Char 254 */ -0,0,0,0,0,0, -0,1,1,0,0,0, -0,1,1,0,0,0, -0,1,1,1,1,0, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,0,1,1, -0,1,1,1,1,0, -0,1,1,0,0,0, -0,1,1,0,0,0, - -/* Char 255 */ -0,0,1,0,1,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,1,1,0,0,1, -0,1,1,0,0,1, -0,1,1,0,1,1, -0,0,1,0,1,0, -0,0,1,1,1,0, -0,0,0,1,1,0, -0,0,0,1,0,0, -0,0,1,1,0,0, - - -}; - -gdFont gdLucidaBold10Rep = { - 256, - 0, - 6, - 11, - gdLucidaBold10Data -}; - -gdFontPtr gdLucidaBold10 = &gdLucidaBold10Rep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdlucidab10.h b/libraries/gd1.3/gdlucidab10.h deleted file mode 100644 index 0648c7c..0000000 --- a/libraries/gd1.3/gdlucidab10.h +++ /dev/null @@ -1,21 +0,0 @@ - -#ifndef _GDLUCIDAB10_H_ -#define _GDLUCIDAB10_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Bold-R-Normal-Sans-10-100-75-75-M-60-ISO8859-1 - at Tue Jul 13 15:36:06 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gd.h" - -extern gdFontPtr gdLucidaBold10; - -#endif - diff --git a/libraries/gd1.3/gdlucidab12.c b/libraries/gd1.3/gdlucidab12.c deleted file mode 100644 index ce44f5a..0000000 --- a/libraries/gd1.3/gdlucidab12.c +++ /dev/null @@ -1,3870 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Bold-R-Normal-Sans-12-120-75-75-M-70-ISO8859-1 - at Tue Jul 13 15:35:50 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gdlucidab12.h" - -char gdLucidaBold12Data[] = { -/* Char 0 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 2 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - 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-/* Char 243 */ -0,0,0,0,0,0,0, -0,0,0,0,1,1,0, -0,0,0,1,1,0,0, -0,0,0,0,0,0,0, -0,0,1,1,1,1,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,0,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 244 */ -0,0,0,0,0,0,0, -0,0,0,1,1,0,0, -0,0,1,0,1,1,0, -0,0,0,0,0,0,0, -0,0,1,1,1,1,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,0,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 245 */ -0,0,0,0,0,0,0, -0,0,1,1,0,1,0, -0,1,0,1,1,0,0, -0,0,0,0,0,0,0, -0,0,1,1,1,1,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,0,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 246 */ -0,0,0,0,0,0,0, -0,0,1,0,0,1,0, -0,0,1,0,0,1,0, -0,0,0,0,0,0,0, -0,0,1,1,1,1,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,0,1,1,1,1,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 247 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,1,0,0,0, -0,0,0,1,0,0,0, -0,0,0,0,0,0,0, -1,1,1,1,1,1,1, -0,0,0,0,0,0,0, -0,0,0,1,0,0,0, -0,0,0,1,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 248 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,1, -0,0,1,1,1,1,1, -0,1,1,0,0,1,1, -0,1,1,0,1,1,1, -0,1,1,1,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,1,1,1,0, -0,1,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 249 */ -0,0,0,0,0,0,0, -0,0,1,1,0,0,0, -0,0,0,1,1,0,0, -0,0,0,0,0,0,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,1,1,1, -0,0,1,1,0,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 250 */ -0,0,0,0,0,0,0, -0,0,0,0,1,1,0, -0,0,0,1,1,0,0, -0,0,0,0,0,0,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,1,1,1, -0,0,1,1,0,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 251 */ -0,0,0,0,0,0,0, -0,0,0,1,1,0,0, -0,0,1,0,1,1,0, -0,0,0,0,0,0,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,1,1,1, -0,0,1,1,0,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 252 */ -0,0,0,0,0,0,0, -0,0,1,0,0,1,0, -0,0,1,0,0,1,0, -0,0,0,0,0,0,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,1,1,1, -0,0,1,1,0,1,1, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 253 */ -0,0,0,0,0,0,0, -0,0,0,0,1,1,0, -0,0,0,1,1,0,0, -0,0,0,0,0,0,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,0,1,1,0,1,0, -0,0,1,1,0,1,0, -0,0,0,1,1,0,0, -0,0,0,1,1,0,0, -0,0,0,1,0,0,0, -0,0,1,1,0,0,0, - -/* Char 254 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,1,0,0,0,0, -0,1,1,0,0,0,0, -0,1,1,0,1,1,0, -0,1,1,1,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,1,1,1,0, -0,1,1,0,0,0,0, -0,1,1,0,0,0,0, - -/* Char 255 */ -0,0,0,0,0,0,0, -0,0,1,0,0,1,0, -0,0,1,0,0,1,0, -0,0,0,0,0,0,0, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,1,1,0,0,1,1, -0,0,1,1,0,1,0, -0,0,1,1,0,1,0, -0,0,0,1,1,0,0, -0,0,0,1,1,0,0, -0,0,0,1,0,0,0, -0,0,1,1,0,0,0, - - -}; - -gdFont gdLucidaBold12Rep = { - 256, - 0, - 7, - 13, - gdLucidaBold12Data -}; - -gdFontPtr gdLucidaBold12 = &gdLucidaBold12Rep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdlucidab12.h b/libraries/gd1.3/gdlucidab12.h deleted file mode 100644 index 97f2783..0000000 --- a/libraries/gd1.3/gdlucidab12.h +++ /dev/null @@ -1,21 +0,0 @@ - -#ifndef _GDLUCIDAB12_H_ -#define _GDLUCIDAB12_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Bold-R-Normal-Sans-12-120-75-75-M-70-ISO8859-1 - at Tue Jul 13 15:35:50 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gd.h" - -extern gdFontPtr gdLucidaBold12; - -#endif - diff --git a/libraries/gd1.3/gdlucidab14.c b/libraries/gd1.3/gdlucidab14.c deleted file mode 100644 index c423462..0000000 --- a/libraries/gd1.3/gdlucidab14.c +++ /dev/null @@ -1,4382 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Bold-R-Normal-Sans-14-140-75-75-M-90-ISO8859-1 - at Tue Jul 13 15:35:35 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gdlucidab14.h" - -char gdLucidaBold14Data[] = { -/* Char 0 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 2 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 3 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 4 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 5 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 6 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 7 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - 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- -}; - -gdFont gdLucidaBold14Rep = { - 256, - 0, - 9, - 15, - gdLucidaBold14Data -}; - -gdFontPtr gdLucidaBold14 = &gdLucidaBold14Rep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdlucidab14.h b/libraries/gd1.3/gdlucidab14.h deleted file mode 100644 index 87c7de3..0000000 --- a/libraries/gd1.3/gdlucidab14.h +++ /dev/null @@ -1,21 +0,0 @@ - -#ifndef _GDLUCIDAB14_H_ -#define _GDLUCIDAB14_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Bold-R-Normal-Sans-14-140-75-75-M-90-ISO8859-1 - at Tue Jul 13 15:35:35 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gd.h" - -extern gdFontPtr gdLucidaBold14; - -#endif - diff --git a/libraries/gd1.3/gdlucidan10.c b/libraries/gd1.3/gdlucidan10.c deleted file mode 100644 index 9453e33..0000000 --- a/libraries/gd1.3/gdlucidan10.c +++ /dev/null @@ -1,3358 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Medium-R-Normal-Sans-10-100-75-75-M-60-ISO8859-1 - at Tue Jul 13 15:33:56 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gdlucidan10.h" - -char gdLucidaNormal10Data[] = { -/* Char 0 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 2 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 3 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 4 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 5 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 6 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 7 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 8 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 9 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 10 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 11 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 12 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 13 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 14 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 15 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 16 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 17 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 18 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 19 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 20 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 21 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - 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-/* Char 244 */ -0,0,0,1,0,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,0,1,1,0,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,0,1,1,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 245 */ -0,0,1,0,1,0, -0,1,0,1,0,0, -0,0,0,0,0,0, -0,0,1,1,0,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,0,1,1,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 246 */ -0,0,0,0,0,0, -0,1,0,0,1,0, -0,0,0,0,0,0, -0,0,1,1,0,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,0,1,1,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 247 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,1,0,0, -0,0,0,0,0,0, -0,1,1,1,1,1, -0,0,0,0,0,0, -0,0,0,1,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 248 */ -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, -0,0,1,1,0,1, -0,1,0,0,1,0, -0,1,0,1,1,0, -0,1,1,0,1,0, -0,1,0,0,1,0, -1,0,1,1,0,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 249 */ -0,0,1,0,0,0, -0,0,0,1,0,0, -0,0,0,0,0,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,1,1,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 250 */ -0,0,0,1,0,0, -0,0,1,0,0,0, -0,0,0,0,0,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,1,1,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 251 */ -0,0,0,1,0,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,1,1,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 252 */ -0,0,0,0,0,0, -0,1,0,0,1,0, -0,0,0,0,0,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,1,1,0, -0,0,1,0,1,0, -0,0,0,0,0,0, -0,0,0,0,0,0, - -/* Char 253 */ -0,0,0,1,0,0, -0,0,1,0,0,0, -0,0,0,0,0,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,0,1,1,0,0, -0,0,1,1,0,0, -0,0,1,0,0,0, -0,1,0,0,0,0, -0,1,0,0,0,0, - -/* Char 254 */ -0,0,0,0,0,0, -0,1,0,0,0,0, -0,1,0,0,0,0, -0,1,0,1,0,0, -0,1,1,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,1,1,0,0, -0,1,0,0,0,0, -0,1,0,0,0,0, - -/* Char 255 */ -0,0,0,0,0,0, -0,1,0,0,1,0, -0,0,0,0,0,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,1,0,0,1,0, -0,0,1,1,0,0, -0,0,1,1,0,0, -0,0,1,0,0,0, -0,1,0,0,0,0, -0,1,0,0,0,0, - - -}; - -gdFont gdLucidaNormal10Rep = { - 256, - 0, - 6, - 11, - gdLucidaNormal10Data -}; - -gdFontPtr gdLucidaNormal10 = &gdLucidaNormal10Rep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdlucidan10.h b/libraries/gd1.3/gdlucidan10.h deleted file mode 100644 index c6e29bb..0000000 --- a/libraries/gd1.3/gdlucidan10.h +++ /dev/null @@ -1,21 +0,0 @@ - -#ifndef _GDLUCIDAN10_H_ -#define _GDLUCIDAN10_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Medium-R-Normal-Sans-10-100-75-75-M-60-ISO8859-1 - at Tue Jul 13 15:33:56 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gd.h" - -extern gdFontPtr gdLucidaNormal10; - -#endif - diff --git a/libraries/gd1.3/gdlucidan12.c b/libraries/gd1.3/gdlucidan12.c deleted file mode 100644 index f7c0f46..0000000 --- a/libraries/gd1.3/gdlucidan12.c +++ /dev/null @@ -1,3870 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Medium-R-Normal-Sans-12-120-75-75-M-70-ISO8859-1 - at Tue Jul 13 15:33:27 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gdlucidan12.h" - -char gdLucidaNormal12Data[] = { -/* Char 0 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 2 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 3 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 4 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 5 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 6 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - -/* Char 7 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, - 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-/* Char 253 */ -0,0,0,0,0,0,0, -0,0,0,0,1,0,0, -0,0,0,1,0,0,0, -0,0,0,0,0,0,0, -0,1,0,0,0,1,0, -0,1,0,0,0,1,0, -0,1,0,0,0,1,0, -0,0,1,0,1,0,0, -0,0,1,0,1,0,0, -0,0,0,1,0,0,0, -0,0,0,1,0,0,0, -0,0,1,0,0,0,0, -0,1,1,0,0,0,0, - -/* Char 254 */ -0,0,0,0,0,0,0, -0,0,0,0,0,0,0, -0,1,0,0,0,0,0, -0,1,0,0,0,0,0, -0,1,0,1,1,0,0, -0,1,1,0,0,1,0, -0,1,0,0,0,1,0, -0,1,0,0,0,1,0, -0,1,0,0,0,1,0, -0,1,0,0,0,1,0, -0,1,1,1,1,0,0, -0,1,0,0,0,0,0, -0,1,0,0,0,0,0, - -/* Char 255 */ -0,0,0,0,0,0,0, -0,0,1,0,1,0,0, -0,0,1,0,1,0,0, -0,0,0,0,0,0,0, -0,1,0,0,0,1,0, -0,1,0,0,0,1,0, -0,1,0,0,0,1,0, -0,0,1,0,1,0,0, -0,0,1,0,1,0,0, -0,0,0,1,0,0,0, -0,0,0,1,0,0,0, -0,0,1,0,0,0,0, -0,1,1,0,0,0,0, - - -}; - -gdFont gdLucidaNormal12Rep = { - 256, - 0, - 7, - 13, - gdLucidaNormal12Data -}; - -gdFontPtr gdLucidaNormal12 = &gdLucidaNormal12Rep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdlucidan12.h b/libraries/gd1.3/gdlucidan12.h deleted file mode 100644 index 6a74869..0000000 --- a/libraries/gd1.3/gdlucidan12.h +++ /dev/null @@ -1,21 +0,0 @@ - -#ifndef _GDLUCIDAN12_H_ -#define _GDLUCIDAN12_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Medium-R-Normal-Sans-12-120-75-75-M-70-ISO8859-1 - at Tue Jul 13 15:33:27 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gd.h" - -extern gdFontPtr gdLucidaNormal12; - -#endif - diff --git a/libraries/gd1.3/gdlucidan14.c b/libraries/gd1.3/gdlucidan14.c deleted file mode 100644 index 49ccc9c..0000000 --- a/libraries/gd1.3/gdlucidan14.c +++ /dev/null @@ -1,4382 +0,0 @@ - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Medium-R-Normal-Sans-14-140-75-75-M-90-ISO8859-1 - at Tue Jul 13 15:35:10 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gdlucidan14.h" - -char gdLucidaNormal14Data[] = { -/* Char 0 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 1 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 2 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 3 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 4 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 5 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 6 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 7 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 8 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 9 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 10 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 11 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - 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-/* Char 240 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,1,0,0,1,1,0,0, -0,0,0,1,1,0,0,0,0, -0,1,1,0,1,0,0,0,0, -0,0,0,1,1,1,1,0,0, -0,0,1,0,0,0,1,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,0,1,0,0,0,1,0,0, -0,0,0,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 241 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,1,0,0, -0,0,1,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,0,0,1,1,1,0,0, -0,1,0,1,0,0,1,1,0, -0,1,1,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 242 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,0,0,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,1,0,0,0, -0,0,1,0,0,0,1,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,0,1,0,0,0,1,0,0, -0,0,0,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 243 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,1,1,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,1,0,0,0, -0,0,1,0,0,0,1,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,0,1,0,0,0,1,0,0, -0,0,0,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 244 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,1,0,0,1,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,1,0,0,0, -0,0,1,0,0,0,1,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,0,1,0,0,0,1,0,0, -0,0,0,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 245 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,0,1,0,0, -0,0,1,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,1,0,0,0, -0,0,1,0,0,0,1,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,0,1,0,0,0,1,0,0, -0,0,0,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 246 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,1,0,0,0, -0,0,1,0,0,0,1,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,0,1,0,0,0,1,0,0, -0,0,0,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 247 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,1,0,0,0,0, -0,0,0,0,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,1,1,1,1,1,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,1,0,0,0,0, -0,0,0,0,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 248 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,1,1,0,1,0, -0,0,1,0,0,0,1,0,0, -0,1,0,0,0,1,0,1,0, -0,1,0,0,1,0,0,1,0, -0,1,0,0,1,0,0,1,0, -0,1,0,1,0,0,0,1,0, -0,0,1,0,0,0,1,0,0, -0,1,0,1,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 249 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,1,1,0,0,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,0,1,0, -0,0,1,1,1,0,0,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 250 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,1,1,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,0,1,0, -0,0,1,1,1,0,0,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 251 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,1,1,0,0,0, -0,0,0,1,0,0,1,0,0, -0,0,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,0,1,0, -0,0,1,1,1,0,0,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 252 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,1,1,0, -0,1,1,0,0,1,0,1,0, -0,0,1,1,1,0,0,1,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, - -/* Char 253 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,1,1,0,0, -0,0,0,1,1,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,0,1,0,0,0,1,0,0, -0,0,1,0,0,0,1,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,0,1,0,0,0,0, -0,0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0,0, -0,0,1,1,0,0,0,0,0, - -/* Char 254 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,0,0, -0,1,0,1,1,1,0,0,0, -0,1,1,0,0,0,1,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,1,0,0, -0,1,1,1,1,1,0,0,0, -0,1,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,0,0, - -/* Char 255 */ -0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,0,0,0,0,0,0, -0,1,0,0,0,0,0,1,0, -0,1,0,0,0,0,0,1,0, -0,0,1,0,0,0,1,0,0, -0,0,1,0,0,0,1,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,1,0,1,0,0,0, -0,0,0,0,1,0,0,0,0, -0,0,0,0,1,0,0,0,0, -0,0,0,1,0,0,0,0,0, -0,0,1,1,0,0,0,0,0, - - -}; - -gdFont gdLucidaNormal14Rep = { - 256, - 0, - 9, - 15, - gdLucidaNormal14Data -}; - -gdFontPtr gdLucidaNormal14 = &gdLucidaNormal14Rep; - -/* This file has not been truncated. */ - diff --git a/libraries/gd1.3/gdlucidan14.h b/libraries/gd1.3/gdlucidan14.h deleted file mode 100644 index 882a324..0000000 --- a/libraries/gd1.3/gdlucidan14.h +++ /dev/null @@ -1,21 +0,0 @@ - -#ifndef _GDLUCIDAN14_H_ -#define _GDLUCIDAN14_H_ 1 - -/* - This is a header file for gd font, generated using - bdftogd version 0.51 by Jan Pazdziora, adelton@fi.muni.cz - from bdf font - -B&H-LucidaTypewriter-Medium-R-Normal-Sans-14-140-75-75-M-90-ISO8859-1 - at Tue Jul 13 15:35:10 1999. - The original bdf was holding following copyright: - "Copyright Bigelow & Holmes 1986, 1985." - */ - - -#include "gd.h" - -extern gdFontPtr gdLucidaNormal14; - -#endif - diff --git a/libraries/gd1.3/giftogd.c b/libraries/gd1.3/giftogd.c deleted file mode 100644 index 97468f7..0000000 --- a/libraries/gd1.3/giftogd.c +++ /dev/null @@ -1,38 +0,0 @@ -#include -#include "gd.h" - -/* A short program which converts a .gif file into a .gd file, for - your convenience in creating images on the fly from a - basis image that must be loaded quickly. The .gd format - is not intended to be a general-purpose format. */ - -int main(int argc, char **argv) -{ - gdImagePtr im; - FILE *in, *out; - if (argc != 3) { - fprintf(stderr, "Usage: giftogd filename.gif filename.gd\n"); - exit(1); - } - in = fopen(argv[1], "rb"); - if (!in) { - fprintf(stderr, "Input file does not exist!\n"); - exit(1); - } - im = gdImageCreateFromGif(in); - fclose(in); - if (!im) { - fprintf(stderr, "Input is not in GIF format!\n"); - exit(1); - } - out = fopen(argv[2], "wb"); - if (!out) { - fprintf(stderr, "Output file cannot be written to!\n"); - gdImageDestroy(im); - exit(1); - } - gdImageGd(im, out); - fclose(out); - gdImageDestroy(im); -} - diff --git a/libraries/gd1.3/index.html b/libraries/gd1.3/index.html deleted file mode 100644 index 6d532be..0000000 --- a/libraries/gd1.3/index.html +++ /dev/null @@ -1,1973 +0,0 @@ - - -gd 1.3 - - -

gd 1.3

-

A graphics library for fast GIF creation

-

Follow this link to the -latest version -of this document.

-

Table of Contents

- -

-Up to the Boutell.Com, Inc. Home Page -

Credits and license terms

-

-In order to resolve any possible confusion regarding the authorship -of gd, the following copyright statement covers all of the authors -who have required such a statement. Although his LZW compression -code no longer appears in gd, the authors wish to thank David Rowley -for the original LZW-based GIF compression code, which has been removed -due to patent concerns. If you are aware of any oversights -in this copyright notice, please contact -Thomas Boutell who will be -pleased to correct them. -

-COPYRIGHT STATEMENT FOLLOWS THIS LINE
-
-
-Portions copyright 1994, 1995, 1996, 1997, 1998, by Cold Spring -Harbor Laboratory. Funded under Grant P41-RR02188 by the National -Institutes of Health. -

-Portions copyright 1996, 1997, 1998, by Boutell.Com, Inc. -

-GIF decompression code copyright 1990, 1991, 1993, by David Koblas -(koblas@netcom.com). -

-Non-LZW-based GIF compression code copyright 1998, by Hutchison Avenue -Software Corporation (http://www.hasc.com/, -info@hasc.com). -

-Permission has been granted to copy and distribute gd in any -context, including a commercial application, provided that this notice -is present in user-accessible supporting documentation. -

-This does not affect your ownership of the derived work itself, and the intent -is to assure proper credit for the authors of gd, not to interfere -with your productive use of gd. If you have questions, ask. -"Derived works" includes all programs that utilize the library. -Credit must be given in user-accessible documentation. -

-Permission to use, copy, modify, and distribute this software and its -documentation for any purpose and without fee is hereby granted, provided -that the above copyright notice appear in all copies and that both that -copyright notice and this permission notice appear in supporting -documentation. This software is provided "as is" without express or -implied warranty. -

-

-
-END OF COPYRIGHT STATEMENT
-
-

What is gd?

 -

-gd is a graphics library. It allows your code to quickly -draw images complete with lines, arcs, text, multiple -colors, cut and paste from other images, and flood fills, and -write out the result as a .GIF file. This is particularly -useful in World Wide Web applications, where .GIF is the -format used for inline images. -

-gd is not a paint program. -If you are looking for a paint program, you are looking in -the wrong place. If you are not a programmer, you are looking -in the wrong place. -

-gd does not provide for every possible desirable graphics -operation. It is not necessary or desirable for gd to become -a kitchen-sink graphics package, but version 1.3 incorporates -most of the commonly requested features for an 8-bit 2D package. -Support for scalable fonts, and truecolor images, JPEG and PNG -is planned for version 2.0. Version 1.3 was released to correct -longstanding bugs and provide an LZW-free GIF compression routine. -

-

What if I want to use another programming -language?

-

Perl

-gd can also be used from Perl, courtesy of -Lincoln Stein's - -GD.pm library, which uses gd as the basis for a set of -Perl 5.x classes. GD.pm is based on gd 1.1.1 but gd 1.2 should -be compatible. -

Any Language

-There are, at the moment, at least three simple interpreters that -perform gd operations. You can output the desired commands to a simple -text file from whatever scripting language you prefer to use, then -invoke the interpreter. -

-These packages are based on gd 1.2 as of this writing but should -be compatible with gd 1.3 with minimal tweaking. -

    -
  • tgd, by Bradley K. Sherman -
  • fly, by Martin Gleeson -
-

What's new in version 1.3?

-Version 1.3 features the following changes: -
-
Non-LZW-based GIF compression code -
-Version 1.3 contains GIF compression code that uses simple Run Length -Encoding instead of LZW compression, while still retaining compatibility -with normal LZW-based GIF decoders (your browser will still like your GIFs). -LZW compression is patented by Unisys. This is why there have -been no new versions of gd for a long time. THANKS to -Hutchison Avenue Software Corporation for contributing -this code. THE NEW CODE PRODUCES LARGER GIFS AND IS NOT WELL -SUITED TO PHOTOGRAPHIC IMAGES. THIS IS A LEGAL ISSUE. -IT IS NOT A QUESTION OF TECHNICAL SKILL. PLEASE DON'T -COMPLAIN ABOUT THE SIZE OF GIF OUTPUT. THANKS! -
8-bit fonts, and 8-bit font support -
This improves support for European languages. Thanks are due -to Honza Pazdziora and also to -Jan Pazdziora . Also see the provided bdftogd -Perl script if you wish to convert fixed-width X11 fonts -to gd fonts. -
16-bit font support (no fonts provided) -
Although no such fonts are provided in the distribution, -fonts containing more than 256 characters should work if the -gdImageString16 and gdImageStringUp16 routines are used. -
Improvements to the "webgif" example/utility -
The "webgif" utility is now a slightly more useful application. Thanks to -Brian Dowling for this code. -
Corrections to the color resolution field of GIF output -
Thanks to Bruno Aureli. -
Fixed polygon fills -
A one-line patch for the infamous polygon fill bug, courtesy -of Jim Mason. I believe this fix is sufficient. However, if you -find a situation where polygon fills still fail to behave properly, -please send code that demonstrates the problem, and a fix if -you have one. Verifying the fix is important. -
Row-major, not column-major -
Internally, gd now represents the array of pixels as -an array of rows of pixels, rather than an array of columns -of pixels. This improves the performance of compression and -decompression routines slightly, because horizontally adjacent -pixels are now next to each other in memory. This should -not affect properly written gd applications, but applications that -directly manipulate the pixels array will require -changes. -
-

What else do I need to use gd?

 -

-To use gd, you will need an ANSI C compiler. All popular -Windows 95 and NT C compilers are ANSI C compliant. Any -full-ANSI-standard C compiler should be adequate. The cc -compiler released with SunOS 4.1.3 is not an ANSI C compiler. -Most Unix users who do not already have gcc should get it. -gcc is free, ANSI compliant and a de facto industry standard. -Ask your ISP why it is missing. -

-You will also want a GIF viewer, if you do not already have -one for your system, since you will need a good way to check the -results of your work. Any web browser will work, but you might -be happier with a package like Lview Pro for Windows or -xv for X. There are GIF viewers available for every graphics-capable -computer out there, so consult newsgroups relevant to -your particular system. -

-

How do I get gd?

-

By HTTP

- -

By FTP

- -

-

How do I build gd?

-

-In order to build gd, you must first unpack the archive you have -downloaded. If you are not familiar with tar and -gunzip (Unix) or ZIP (Windows), please -consult with an experienced user of your system. Sorry, we cannot -answer questions about basic Internet skills. -

-Unpacking the archive will produce a directory called "gd1.3". -

-

For Unix

-cd to the gd1.3 directory and examine the Makefile, which -you will probably need to change slightly depending on your operating -system and your needs. -

For Windows, Mac, Et Cetera

-Create a project using your favorite programming environment. -Copy all of the gd files to the project directory. Add gd.c -to your project. Add other source files as appropriate. Learning the -basic skills of creating projects with your chosen C environment -is up to you. -

-Now, to build the demonstration program, just type "make gddemo" -if you are working in a command-line environment, or build a project -that includes gddemo.c if you are using a graphical environment. If all -goes well, the program "gddemo" will be compiled and linked without incident. -Depending on your system you may need to edit the Makefile. -Understanding the basic techniques of compiling and linking -programs on your system is up to you. -

-You have now built a demonstration program which shows off -the capabilities of gd. To see it in action, type -"gddemo". -

-gddemo should execute without incident, creating the file -demoout.gif. (Note there is also a file named demoin.gif, -which is provided in the package as part of the demonstration.) -

-Display demoout.gif in your GIF viewer. The image should -be 128x128 pixels and should contain an image of the -space shuttle with quite a lot of graphical elements drawn -on top of it. -

-(If you are missing the demoin.gif file, the other items -should appear anyway.) -

-Look at demoin.gif to see the original space shuttle -image which was scaled and copied into the output image. -

-

gd basics: using gd in your program

-gd lets you create GIF images on the fly. To use gd in your -program, include the file gd.h, and link with the libgd.a -library produced by "make libgd.a", under Unix. Under other -operating systems you will add gd.c to your own project. -

-If you want to use the provided fonts, include -gdfontt.h, gdfonts.h, gdfontmb.h, gdfontl.h and/or gdfontg.h. If you -are not using the provided Makefile and/or a library-based approach, be -sure to include the source modules as well in your -project. (They may be too large for 16-bit memory models, -that is, 16-bit DOS and Windows.) -

-Here is a short example program. (For a more advanced example, -see gddemo.c, included in the distribution. gddemo.c is NOT the same program; -it demonstrates additional features!) -

-

-/* Bring in gd library functions */
-#include "gd.h"
-
-/* Bring in standard I/O so we can output the GIF to a file */
-#include <stdio.h>
-
-int main() {
-	/* Declare the image */
-	gdImagePtr im;
-	/* Declare an output file */
-	FILE *out;
-	/* Declare color indexes */
-	int black;
-	int white;
-
-	/* Allocate the image: 64 pixels across by 64 pixels tall */
-	im = gdImageCreate(64, 64);
-
-	/* Allocate the color black (red, green and blue all minimum).
-		Since this is the first color in a new image, it will
-		be the background color. */
-	black = gdImageColorAllocate(im, 0, 0, 0);	
-
-	/* Allocate the color white (red, green and blue all maximum). */
-	white = gdImageColorAllocate(im, 255, 255, 255);	
-	
-	/* Draw a line from the upper left to the lower right,
-		using white color index. */
-	gdImageLine(im, 0, 0, 63, 63, white);	
-
-	/* Open a file for writing. "wb" means "write binary", important
-		under MSDOS, harmless under Unix. */
-	out = fopen("test.gif", "wb");
-
-	/* Output the image to the disk file. */
-	gdImageGif(im, out);	
-
-	/* Close the file. */
-	fclose(out);
-
-	/* Destroy the image in memory. */
-	gdImageDestroy(im);
-}
-
-When executed, this program creates an image, allocates -two colors (the first color allocated becomes the background -color), draws a diagonal line (note that 0, 0 is the upper -left corner), writes the image to a GIF file, and -destroys the image. -

-The above example program should -give you an idea of how the package works. -gd provides many additional functions, which are listed -in the following reference chapters, complete with code -snippets demonstrating each. There is also an -alphabetical index. -

Webgif: a more powerful gd example

-Webgif is a simple utility program to manipulate GIFs from the -command line. It is written for Unix and similar command-line -systems, but should be easily adapted for other environments. -Webgif allows you to set transparency and interlacing and -output interesting information about the GIF in question. -

-webgif.c is provided in the distribution. Unix users can -simply type "make webgif" to compile the program. Type -"webgif" with no arguments to see the available options. -

Function and type reference

- -

Types

-
-
gdImage(TYPE) -
-The data structure in which gd stores images. -gdImageCreate returns -a pointer to this type, and the other functions expect to receive -a pointer to this type as their first argument. You may -read the members sx (size on X axis), -sy (size on Y axis), colorsTotal -(total colors), red (red component of colors; -an array of 256 integers between 0 and 255), green -(green component of colors, as above), blue -(blue component of colors, as above), and transparent -(index of transparent color, -1 if none); please do so -using the macros provided. Do NOT set the members directly -from your code; use the functions provided. -
-typedef struct {
-	unsigned char ** pixels;
-	int sx;
-	int sy;
-	int colorsTotal;
-	int red[gdMaxColors];
-	int green[gdMaxColors];
-	int blue[gdMaxColors]; 
-	int open[gdMaxColors];
-	int transparent;
-} gdImage;
-
-
gdImagePtr (TYPE) -
-A pointer to an image structure. gdImageCreate -returns this type, and the other functions expect it as the first -argument. -
gdFont (TYPE) -
-A font structure. Used to declare the characteristics of a font. -Plese see the files gdfontl.c and gdfontl.h for an example of the -proper declaration of this structure. You can provide your -own font data by providing such a structure and the associated -pixel array. You can determine the width and height of a single -character in a font by examining the w and h members of the -structure. If you will not be creating your own fonts, you will -not need to concern yourself with the rest of the components of this -structure. -
-typedef struct {
-	/* # of characters in font */
-	int nchars;
-	/* First character is numbered... (usually 32 = space) */
-	int offset;
-	/* Character width and height */
-	int w;
-	int h;
-	/* Font data; array of characters, one row after another.
-		Easily included in code, also easily loaded from
-		data files. */
-	char *data;
-} gdFont;
-
-
gdFontPtr (TYPE) -
-A pointer to a font structure. Text-output functions expect these -as their second argument, following the -gdImagePtr argument. Two such pointers are declared in the -provided include files gdfonts.h and gdfontl.h. -
gdPoint (TYPE) -
-Represents a point in the coordinate space of the image; used -by gdImagePolygon and -gdImageFilledPolygon. -
-typedef struct {
-        int x, y;
-} gdPoint, *gdPointPtr;
-
-
gdPointPtr (TYPE) -
-A pointer to a gdPoint structure; passed -as an argument to gdImagePolygon -and gdImageFilledPolygon. -
-

Image creation, destruction, loading and saving

-
-
gdImageCreate(sx, sy) -(FUNCTION) -
-gdImageCreate is called to create images. Invoke gdImageCreate -with the x and y dimensions of the desired image. gdImageCreate -returns a gdImagePtr to the new image, or -NULL if unable to -allocate the image. The image must eventually be destroyed -using gdImageDestroy(). -
-... inside a function ...
-gdImagePtr im;
-im = gdImageCreate(64, 64);
-/* ... Use the image ... */
-gdImageDestroy(im);
-
-
gdImageCreateFromGif(FILE *in) -(FUNCTION) -
-gdImageCreateFromGif is called to load images from GIF format files. -Invoke gdImageCreateFromGif with an already opened pointer to a file -containing the desired image. -gdImageCreateFromGif -returns a gdImagePtr to the new image, or NULL -if unable to load the image (most often because the file is corrupt or -does not contain a GIF image). gdImageCreateFromGif does not -close the file. You can inspect the sx and sy members of the -image to determine its size. The image must eventually be destroyed -using gdImageDestroy(). -
-gdImagePtr im;
-... inside a function ...
-FILE *in;
-in = fopen("mygif.gif", "rb");
-im = gdImageCreateFromGif(in);
-fclose(in);
-/* ... Use the image ... */
-gdImageDestroy(im);
-
-
gdImageCreateFromGd(FILE *in) -(FUNCTION) -
-gdImageCreateFromGd is called to load images from gd format files. -Invoke gdImageCreateFromGd -with an already opened pointer to a file containing the desired image -in the gd file format, which is specific to -gd and intended for very fast loading. (It is not intended for -compression; for compression, use GIF.) -gdImageCreateFromGd -returns a gdImagePtr to the new image, or NULL -if unable to load the image (most often because the file is corrupt or -does not contain a gd format image). gdImageCreateFromGd does not -close the file. You can inspect the sx and sy members of the -image to determine its size. The image must eventually be destroyed -using gdImageDestroy(). -
-... inside a function ...
-gdImagePtr im;
-FILE *in;
-in = fopen("mygd.gd", "rb");
-im = gdImageCreateFromGd(in);
-fclose(in);
-/* ... Use the image ... */
-gdImageDestroy(im);
-
-
gdImageCreateFromXbm(FILE *in) -(FUNCTION) -
-gdImageCreateFromXbm is called to load images from X bitmap format -files. Invoke gdImageCreateFromXbm -with an already opened pointer to a file containing the desired image. -gdImageCreateFromXbm -returns a gdImagePtr to the new image, or NULL -if unable to load the image (most often because the file is corrupt or -does not contain an X bitmap format image). gdImageCreateFromXbm does -not close the file. You can inspect the sx and sy members of the -image to determine its size. The image must eventually be destroyed -using gdImageDestroy(). -
-... inside a function ...
-gdImagePtr im;
-FILE *in;
-in = fopen("myxbm.xbm", "rb");
-im = gdImageCreateFromXbm(in);
-fclose(in);
-/* ... Use the image ... */
-gdImageDestroy(im);
-
-
gdImageDestroy(gdImagePtr im) (FUNCTION) -
gdImageDestroy is used to free the memory associated with -an image. It is important to invoke gdImageDestroy before -exiting your program or assigning a new image to -a gdImagePtr variable. -
-... inside a function ...
-gdImagePtr im;
-im = gdImageCreate(10, 10);
-/* ... Use the image ... */
-/* Now destroy it */
-gdImageDestroy(im);
-
-
-void gdImageGif(gdImagePtr im, FILE *out) -(FUNCTION) -
-gdImageGif outputs the specified image to the specified -file in GIF format. The file must be open for writing. Under MSDOS, -it is important to use "wb" as opposed to simply "w" -as the mode when opening the file, and under Unix there -is no penalty for doing so. gdImageGif does not -close the file; your code must do so. -
-... inside a function ...
-gdImagePtr im;
-int black, white;
-FILE *out;
-/* Create the image */
-im = gdImageCreate(100, 100);
-/* Allocate background */
-white = gdImageColorAllocate(im, 255, 255, 255);
-/* Allocate drawing color */
-black = gdImageColorAllocate(im, 0, 0, 0);
-/* Draw rectangle */
-gdImageRectangle(im, 0, 0, 99, 99, black);
-/* Open output file in binary mode */
-out = fopen("rect.gif", "wb");
-/* Write GIF */
-gdImageGif(im, out);
-/* Close file */
-fclose(out);
-/* Destroy image */
-gdImageDestroy(im);
-
-
-void gdImageGd(gdImagePtr im, FILE *out) -(FUNCTION) -
-gdImageGd outputs the specified image to the specified -file in the gd image format. The file must -be open for writing. Under MSDOS, it is important to use "wb" as -opposed to simply "w" as the mode when opening the file, and under -Unix there is no penalty for doing so. gdImageGif does not -close the file; your code must do so. -

-The gd image format is intended for fast reads and writes of -images your program will need frequently to build other -images. It is not a compressed format, and is not intended -for general use. -

-... inside a function ...
-gdImagePtr im;
-int black, white;
-FILE *out;
-/* Create the image */
-im = gdImageCreate(100, 100);
-/* Allocate background */
-white = gdImageColorAllocate(im, 255, 255, 255);
-/* Allocate drawing color */
-black = gdImageColorAllocate(im, 0, 0, 0);
-/* Draw rectangle */
-gdImageRectangle(im, 0, 0, 99, 99, black);
-/* Open output file in binary mode */
-out = fopen("rect.gd", "wb");
-/* Write gd format file */
-gdImageGd(im, out);
-/* Close file */
-fclose(out);
-/* Destroy image */
-gdImageDestroy(im);
-
-
-

Drawing Functions

-
-
void gdImageSetPixel(gdImagePtr im, int x, int y, int color) (FUNCTION) -
gdImageSetPixel sets a pixel to a particular color index. Always use -this function or one of the other drawing functions to access pixels; -do not access the pixels of the gdImage structure -directly. -
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Set a pixel near the center. */
-gdImageSetPixel(im, 50, 50, white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImageLine(gdImagePtr im, int x1, int y1, int x2, int y2, int color) -(FUNCTION) -
-gdImageLine is used to draw a line between two endpoints (x1,y1 and x2, y2). -The line is drawn using the color index specified. Note that the color -index can be an actual color returned by -gdImageColorAllocate or one of gdStyled, -gdBrushed or -gdStyledBrushed. -
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Draw a line from the upper left corner to the lower right corner. */
-gdImageLine(im, 0, 0, 99, 99, white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImageDashedLine(gdImagePtr im, int x1, int y1, int x2, int y2, int color) -(FUNCTION) -
-gdImageDashedLine is provided solely for backwards compatibility - with gd 1.0. New programs should draw dashed lines using -the normal gdImageLine function and the -new gdImageSetStyle function. -

-gdImageDashedLine is used to draw a dashed line between two endpoints -(x1,y1 and x2, y2). -The line is drawn using the color index specified. The portions of the line -that are not drawn are left transparent so the background is visible. -

-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Draw a dashed line from the upper left corner to the lower right corner. */
-gdImageDashedLine(im, 0, 0, 99, 99);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImagePolygon(gdImagePtr im, gdPointPtr points, int pointsTotal, int color) -(FUNCTION) -
-gdImagePolygon is used to draw a polygon with the verticies -(at least 3) specified, using the color index specified. -See also gdImageFilledPolygon. -
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-/* Points of polygon */
-gdPoint points[3];
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Draw a triangle. */
-points[0].x = 50;
-points[0].y = 0;
-points[1].x = 99;
-points[1].y = 99;
-points[2].x = 0;
-points[2].y = 99;
-gdImagePolygon(im, points, 3, white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImageRectangle(gdImagePtr im, int x1, int y1, int x2, int y2, int color) -(FUNCTION) -
-gdImageRectangle is used to draw a rectangle with the two corners -(upper left first, then lower right) specified, using the -color index specified. -
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Draw a rectangle occupying the central area. */
-gdImageRectangle(im, 25, 25, 74, 74, white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImageFilledPolygon(gdImagePtr im, gdPointPtr points, int pointsTotal, int color) -(FUNCTION) -
-gdImageFilledPolygon is used to fill a polygon with the verticies -(at least 3) specified, using the color index specified. -See also gdImagePolygon. -
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-int red;
-/* Points of polygon */
-gdPoint points[3];
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Allocate the color red. */
-red = gdImageColorAllocate(im, 255, 0, 0);	
-/* Draw a triangle. */
-points[0].x = 50;
-points[0].y = 0;
-points[1].x = 99;
-points[1].y = 99;
-points[2].x = 0;
-points[2].y = 99;
-/* Paint it in white */
-gdImageFilledPolygon(im, points, 3, white);
-/* Outline it in red; must be done second */
-gdImagePolygon(im, points, 3, red);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImageFilledRectangle(gdImagePtr im, int x1, int y1, int x2, int y2, int color) -(FUNCTION) -
-gdImageFilledRectangle is used to draw a solid rectangle with the two corners -(upper left first, then lower right) specified, using the -color index specified. -
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = int gdImageColorAllocate(im, 255, 255, 255);	
-/* Draw a filled rectangle occupying the central area. */
-gdImageFilledRectangle(im, 25, 25, 74, 74, white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImageArc(gdImagePtr im, int cx, int cy, int w, int h, int s, int e, int color) - (FUNCTION) -
-gdImageArc is used to draw a partial ellipse centered at the given point, -with the specified width and height in pixels. The arc begins at -the position in degrees specified by s and ends at -the position specified by e. The arc is drawn in -the color specified by the last argument. A circle can be drawn -by beginning from 0 degrees and ending at 360 degrees, with -width and height being equal. e must be greater than s. Values greater -than 360 are interpreted modulo 360. -
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-im = gdImageCreate(100, 50);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Inscribe an ellipse in the image. */
-gdImageArc(im, 50, 25, 98, 48, 0, 360, white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImageFillToBorder(gdImagePtr im, int x, int y, int border, int color) - (FUNCTION) -
-gdImageFillToBorder floods a portion of the image with the specified -color, beginning at the specified point and stopping at -the specified border color. For a way of flooding an -area defined by the color of the starting point, see -gdImageFill. -

-The border color cannot be a special color -such as gdTiled; it must be a proper -solid color. The fill color can be, however. -

-Note that gdImageFillToBorder is recursive. It is not the most -naive implementation possible, and the implementation is -expected to improve, but there will always be degenerate -cases in which the stack can become very deep. This can be -a problem in MSDOS and MS Windows environments. (Of course, -in a Unix or NT environment with a proper stack, this is -not a problem at all.) -

-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-int red;
-im = gdImageCreate(100, 50);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Allocate the color red. */
-red = gdImageColorAllocate(im, 255, 0, 0);	
-/* Inscribe an ellipse in the image. */
-gdImageArc(im, 50, 25, 98, 48, 0, 360, white);
-/* Flood-fill the ellipse. Fill color is red, border color is 
-	white (ellipse). */
-gdImageFillToBorder(im, 50, 50, white, red);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImageFill(gdImagePtr im, int x, int y, int color) - (FUNCTION) -
-gdImageFill floods a portion of the image with the specified -color, beginning at the specified point and flooding the -surrounding region of the same color as the starting point. -For a way of flooding a region defined by a specific border -color rather than by its interior color, see -gdImageFillToBorder. -

-The fill color can be gdTiled, resulting -in a tile fill using another image as the tile. However, -the tile image cannot be transparent. If the image you wish -to fill with has a transparent color index, call -gdImageTransparent on the -tile image and set the transparent color index to -1 -to turn off its transparency. -

-Note that gdImageFill is recursive. It is not the most -naive implementation possible, and the implementation is -expected to improve, but there will always be degenerate -cases in which the stack can become very deep. This can be -a problem in MSDOS and MS Windows environments. (Of course, -in a Unix or NT environment with a proper stack, this is -not a problem at all.) -

-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-int red;
-im = gdImageCreate(100, 50);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Allocate the color red. */
-red = gdImageColorAllocate(im, 255, 0, 0);	
-/* Inscribe an ellipse in the image. */
-gdImageArc(im, 50, 25, 98, 48, 0, 360, white);
-/* Flood-fill the ellipse. Fill color is red, and will replace the
-	black interior of the ellipse. */
-gdImageFill(im, 50, 50, red);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
void gdImageSetBrush(gdImagePtr im, gdImagePtr brush) -(FUNCTION) -
-A "brush" is an image used to draw wide, shaped strokes in another image. Just -as a paintbrush is not a single point, a brush image need not be -a single pixel. Any gd image can be used as a brush, and by -setting the transparent color index of the brush image with -gdImageColorTransparent, -a brush of any shape can be created. All line-drawing functions, -such as gdImageLine and -gdImagePolygon, will use the -current brush if the special "color" -gdBrushed or gdStyledBrushed -is used when calling them. -

-gdImageSetBrush is used to specify the brush to be used in a -particular image. You can set any image to be the brush. -If the brush image does not have the same color map as the -first image, any colors missing from the first image -will be allocated. If not enough colors can be allocated, -the closest colors already available will be used. This -allows arbitrary GIFs to be used as brush images. It also -means, however, that you should not set a brush unless you -will actually use it; if you set a rapid succession of -different brush images, you can quickly fill your color map, -and the results will not be optimal. -

-You need not take any special action when you are finished -with a brush. As for any other image, if you will not -be using the brush image for any further purpose, -you should call gdImageDestroy. -You must not use the color gdBrushed -if the current brush has been destroyed; you can of -course set a new brush to replace it. -

-... inside a function ...
-gdImagePtr im, brush;
-FILE *in;
-int black;
-im = gdImageCreate(100, 100);
-/* Open the brush GIF. For best results, portions of the
-	brush that should be transparent (ie, not part of the
-	brush shape) should have the transparent color index. */
-in = fopen("star.gif", "rb");
-brush = gdImageCreateFromGif(in);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-gdImageSetBrush(im, brush);
-/* Draw a line from the upper left corner to the lower right corner
-	using the brush. */
-gdImageLine(im, 0, 0, 99, 99, gdBrushed);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-/* Destroy the brush image */
-gdImageDestroy(brush);
-
-
void gdImageSetTile(gdImagePtr im, gdImagePtr tile) -(FUNCTION) -
-A "tile" is an image used to fill an area with a repeated pattern. -Any gd image can be used as a tile, and by -setting the transparent color index of the tile image with -gdImageColorTransparent, -a tile that allows certain parts of the underlying area to shine -through can be created. All region-filling functions, -such as gdImageFill and -gdImageFilledPolygon, will use the -current tile if the special "color" -gdTiled is used when calling them. -

-gdImageSetTile is used to specify the tile to be used in a -particular image. You can set any image to be the tile. -If the tile image does not have the same color map as the -first image, any colors missing from the first image -will be allocated. If not enough colors can be allocated, -the closest colors already available will be used. This -allows arbitrary GIFs to be used as tile images. It also -means, however, that you should not set a tile unless you -will actually use it; if you set a rapid succession of -different tile images, you can quickly fill your color map, -and the results will not be optimal. -

-You need not take any special action when you are finished -with a tile. As for any other image, if you will not -be using the tile image for any further purpose, -you should call gdImageDestroy. -You must not use the color gdTiled -if the current tile has been destroyed; you can of -course set a new tile to replace it. -

-... inside a function ...
-gdImagePtr im, tile;
-FILE *in;
-int black;
-im = gdImageCreate(100, 100);
-/* Open the tile GIF. For best results, portions of the
-	tile that should be transparent (ie, allowing the
-	background to shine through) should have the transparent 
-	color index. */
-in = fopen("star.gif", "rb");
-tile = gdImageCreateFromGif(in);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-gdImageSetTile(im, tile);
-/* Fill an area using the tile. */
-gdImageFilledRectangle(im, 25, 25, 75, 75, gdTiled);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-/* Destroy the tile image */
-gdImageDestroy(tile);
-
-
void gdImageSetStyle(gdImagePtr im, int *style, int styleLength) -(FUNCTION) -
-It is often desirable to draw dashed lines, dotted lines, and other -variations on a broken line. gdImageSetStyle can be used to set -any desired series of colors, including a special color that -leaves the background intact, to be repeated during the drawing -of a line. -

-To use gdImageSetStyle, create an array of integers and assign -them the desired series of color values to be repeated. -You can assign the special color value -gdTransparent to indicate that the existing color should -be left unchanged for that particular pixel (allowing a dashed -line to be attractively drawn over an existing image). -

-Then, to draw a line using the style, use the normal -gdImageLine function with the -special color value gdStyled. -

-As of version 1.1.1, the style -array is copied when you set the style, so you need not -be concerned with keeping the array around indefinitely. -This should not break existing code that assumes styles -are not copied. -

-You can also combine styles and brushes to draw the brush -image at intervals instead of in a continuous stroke. -When creating a style for use with a brush, the -style values are interpreted differently: zero (0) indicates -pixels at which the brush should not be drawn, while one (1) -indicates pixels at which the brush should be drawn. -To draw a styled, brushed line, you must use the -special color value -gdStyledBrushed. For an example of this feature -in use, see gddemo.c (provided in the distribution). -

-gdImagePtr im;
-int styleDotted[2], styleDashed[6];
-FILE *in;
-int black;
-int red;
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-red = gdImageColorAllocate(im, 255, 0, 0);	
-/* Set up dotted style. Leave every other pixel alone. */
-styleDotted[0] = red;
-styleDotted[1] = gdTransparent;
-/* Set up dashed style. Three on, three off. */
-styleDashed[0] = red;
-styleDashed[1] = red;
-styleDashed[2] = red;
-styleDashed[3] = gdTransparent;
-styleDashed[4] = gdTransparent;
-styleDashed[5] = gdTransparent;
-/* Set dotted style. Note that we have to specify how many pixels are
-	in the style! */
-gdImageSetStyle(im, styleDotted, 2);
-/* Draw a line from the upper left corner to the lower right corner. */
-gdImageLine(im, 0, 0, 99, 99, gdStyled);
-/* Now the dashed line. */
-gdImageSetStyle(im, styleDashed, 6);
-gdImageLine(im, 0, 99, 0, 99, gdStyled);
-
-/* ... Do something with the image, such as saving it to a file ... */
-
-/* Destroy it */
-gdImageDestroy(im);
-
-
-

Query Functions

-
-
-int gdImageBlue(gdImagePtr im, int color) -(MACRO) -
-gdImageBlue is a macro which returns the blue component of -the specified color index. Use this macro rather than accessing the -structure members directly. -
int gdImageGetPixel(gdImagePtr im, int x, int y) -(FUNCTION) -
-gdImageGetPixel() retrieves the color index of a particular -pixel. Always use this function to query pixels; -do not access the pixels of the gdImage structure -directly. -
-... inside a function ...
-FILE *in;
-gdImagePtr im;
-int c;
-in = fopen("mygif.gif", "rb");
-im = gdImageCreateFromGif(in);
-fclose(in);
-c = gdImageGetPixel(im, gdImageSX(im) / 2, gdImageSY(im) / 2);
-printf("The value of the center pixel is %d; RGB values are %d,%d,%d\n",
-	c, im->red[c], im->green[c], im->blue[c]);
-gdImageDestroy(im);
-
-
-int gdImageBoundsSafe(gdImagePtr im, int x, int y) -(FUNCTION) -
-gdImageBoundsSafe returns true (1) if the specified point is within the bounds -of the image, false (0) if not. This function is intended primarily for -use by those who wish to add functions to gd. All of the gd drawing -functions already clip safely to the edges of the image. -
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-im = gdImageCreate(100, 100);
-if (gdImageBoundsSafe(im, 50, 50)) {
-	printf("50, 50 is within the image bounds\n");
-} else {
-	printf("50, 50 is outside the image bounds\n");
-}
-gdImageDestroy(im);
-
-
-int gdImageGreen(gdImagePtr im, int color) -(MACRO) -
-gdImageGreen is a macro which returns the green component of -the specified color index. Use this macro rather than accessing the -structure members directly. -
-int gdImageRed(gdImagePtr im, int color) -(MACRO) -
-gdImageRed is a macro which returns the red component of -the specified color index. Use this macro rather than accessing the -structure members directly. -
-int gdImageSX(gdImagePtr im) -(MACRO) -
-gdImageSX is a macro which returns the width of the image -in pixels. Use this macro rather than accessing the -structure members directly. -
-int gdImageSY(gdImagePtr im) -(MACRO) -
-gdImageSY is a macro which returns the height of the image -in pixels. Use this macro rather than accessing the -structure members directly. -
-

Fonts and text-handling functions

-
-
-void gdImageChar(gdImagePtr im, gdFontPtr font, int x, int y, - int c, int color) -(FUNCTION) -
-gdImageChar is used to draw single characters on the image. -(To draw multiple characters, use -gdImageString or -gdImageString16.) The second argument is a -pointer to a font definition structure; five fonts are -provided with gd, gdFontTiny, gdFontSmall, gdFontMediumBold, -gdFontLarge, and gdFontGiant. You must -include the files "gdfontt.h", "gdfonts.h", "gdfontmb.h", -"gdfontl.h" and "gdfontg.h" respectively -and (if you are not using a library-based approach) link with the -corresponding .c files to use the provided fonts. -The character specified by the fifth -argument is drawn from left to right in the specified -color. (See gdImageCharUp for a way -of drawing vertical text.) Pixels not -set by a particular character retain their previous color. -
-#include "gd.h"
-#include "gdfontl.h"
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Draw a character. */
-gdImageChar(im, gdFontLarge, 0, 0, 'Q', white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
-void gdImageCharUp(gdImagePtr im, gdFontPtr font, int x, int y, -int c, int color) -(FUNCTION) -
-gdImageCharUp is used to draw single characters on the image, -rotated 90 degrees. -(To draw multiple characters, use -gdImageStringUp or -gdImageStringUp16.) The second argument is a -pointer to a font definition structure; five fonts are -provided with gd, gdFontTiny, gdFontSmall, gdFontMediumBold, -gdFontLarge, and gdFontGiant. You must -include the files "gdfontt.h", "gdfonts.h", "gdfontmb.h", -"gdfontl.h" and "gdfontg.h" respectively -and (if you are not using a library-based approach) link with the -corresponding .c files to use the provided fonts. The character specified by -the fifth argument is drawn -from bottom to top, rotated at a 90-degree angle, in the specified -color. (See gdImageChar for a way -of drawing horizontal text.) Pixels not -set by a particular character retain their previous color. -
-#include "gd.h"
-#include "gdfontl.h"
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Draw a character upwards so it rests against the top of the image. */
-gdImageCharUp(im, gdFontLarge, 
-	0, gdFontLarge->h, 'Q', white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
-void gdImageString(gdImagePtr im, gdFontPtr font, int x, int y, -unsigned char *s, int color) -(FUNCTION) -
-gdImageString is used to draw multiple characters on the image. -(To draw single characters, use -gdImageChar.) The second argument is a -pointer to a font definition structure; five fonts are -provided with gd, gdFontTiny, gdFontSmall, gdFontMediumBold, -gdFontLarge, and gdFontGiant. You must -include the files "gdfontt.h", "gdfonts.h", "gdfontmb.h", -"gdfontl.h" and "gdfontg.h" respectively -and (if you are not using a library-based approach) link with the -corresponding .c files to use the provided fonts. -The null-terminated C string specified -by the fifth argument is drawn from left to right in the specified -color. (See gdImageStringUp for a way -of drawing vertical text.) Pixels not -set by a particular character retain their previous color. -
-#include "gd.h"
-#include "gdfontl.h"
-#include <string.h>
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-/* String to draw. */
-char *s = "Hello.";
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Draw a centered string. */
-gdImageString(im, gdFontLarge,
-	im->w / 2 - (strlen(s) * gdFontLarge->w / 2),
-	im->h / 2 - gdFontLarge->h / 2,
-	s, white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
-void gdImageString16(gdImagePtr im, gdFontPtr font, int x, int y, -unsigned short *s, int color) -(FUNCTION) -
-gdImageString is used to draw multiple 16-bit characters on the image. -(To draw single characters, use -gdImageChar.) The second argument is a -pointer to a font definition structure; five fonts are -provided with gd, gdFontTiny, gdFontSmall, gdFontMediumBold, -gdFontLarge, and gdFontGiant. You must -include the files "gdfontt.h", "gdfonts.h", "gdfontmb.h", -"gdfontl.h" and "gdfontg.h" respectively -and (if you are not using a library-based approach) link with the -corresponding .c files to use the provided fonts. -The null-terminated string of characters represented as 16-bit unsigned -short integers specified by the fifth argument is drawn from left to right -in the specified -color. (See gdImageStringUp16 for a way -of drawing vertical text.) Pixels not -set by a particular character retain their previous color. -

-This function was added in gd1.3 to provide a means of rendering -fonts with more than 256 characters for those who have them. A -more frequently used routine is gdImageString. -

-void gdImageStringUp(gdImagePtr im, gdFontPtr font, int x, int y, -unsigned char *s, int color) -(FUNCTION) -
-gdImageStringUp is used to draw multiple characters on the image, -rotated 90 degrees. -(To draw single characters, use -gdImageCharUp.) The second argument is a -pointer to a font definition structure; five fonts are -provided with gd, gdFontTiny, gdFontSmall, gdFontMediumBold, -gdFontLarge, and gdFontGiant. You must -include the files "gdfontt.h", "gdfonts.h", "gdfontmb.h", -"gdfontl.h" and "gdfontg.h" respectively -and (if you are not using a library-based approach) link with the -corresponding .c files to use the provided fonts.The null-terminated C string specified -by the fifth argument is drawn from bottom to top (rotated -90 degrees) in the specified color. (See -gdImageString for a way -of drawing horizontal text.) Pixels not -set by a particular character retain their previous color. -
-#include "gd.h"
-#include "gdfontl.h"
-#include <string.h>
-... inside a function ...
-gdImagePtr im;
-int black;
-int white;
-/* String to draw. */
-char *s = "Hello.";
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color white (red, green and blue all maximum). */
-white = gdImageColorAllocate(im, 255, 255, 255);	
-/* Draw a centered string going upwards. Axes are reversed,
-	and Y axis is decreasing as the string is drawn. */
-gdImageStringUp(im, gdFontLarge,
-	im->w / 2 - gdFontLarge->h / 2,
-	im->h / 2 + (strlen(s) * gdFontLarge->w / 2),
-	s, white);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
-void gdImageStringUp16(gdImagePtr im, gdFontPtr font, int x, int y, -unsigned short *s, int color) -(FUNCTION) -
-gdImageString is used to draw multiple 16-bit characters vertically on -the image. (To draw single characters, use -gdImageChar.) The second argument is a -pointer to a font definition structure; five fonts are -provided with gd, gdFontTiny, gdFontSmall, gdFontMediumBold, -gdFontLarge, and gdFontGiant. You must -include the files "gdfontt.h", "gdfonts.h", "gdfontmb.h", -"gdfontl.h" and "gdfontg.h" respectively -and (if you are not using a library-based approach) link with the -corresponding .c files to use the provided fonts. -The null-terminated string of characters represented as 16-bit unsigned -short integers specified by the fifth argument is drawn from bottom to top -in the specified color. -(See gdImageStringUp16 for a way -of drawing horizontal text.) Pixels not -set by a particular character retain their previous color. -

-This function was added in gd1.3 to provide a means of rendering -fonts with more than 256 characters for those who have them. A -more frequently used routine is gdImageStringUp.

-

Color-handling functions

-
-
-int gdImageColorAllocate(gdImagePtr im, int r, int g, int b) -(FUNCTION) -
-gdImageColorAllocate finds the first available color index in -the image specified, sets its RGB values to those requested -(255 is the maximum for each), -and returns the index of the new color table entry. When -creating a new image, the first time you invoke this function, -you are setting the background color for that image. -

-In the event that all gdMaxColors colors -(256) have already been allocated, gdImageColorAllocate will -return -1 to indicate failure. (This is not uncommon when -working with existing GIF files that already use 256 colors.) -Note that gdImageColorAllocate -does not check for existing colors that match your request; -see gdImageColorExact -and gdImageColorClosest -for ways to locate existing colors that approximate the -color desired in situations where a new color is not available. -

-... inside a function ...
-gdImagePtr im;
-int black;
-int red;
-im = gdImageCreate(100, 100);
-/* Background color (first allocated) */
-black = gdImageColorAllocate(im, 0, 0, 0);	
-/* Allocate the color red. */
-red = gdImageColorAllocate(im, 255, 0, 0);	
-/* Draw a dashed line from the upper left corner to the lower right corner. */
-gdImageDashedLine(im, 0, 0, 99, 99, red);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
-int gdImageColorClosest(gdImagePtr im, int r, int g, int b) -(FUNCTION) -
-gdImageColorClosest searches the colors which have been -defined thus far in the image specified and returns the -index of the color with RGB values closest to those of the -request. (Closeness is determined by Euclidian distance, -which is used to determine the distance in three-dimensional color -space between colors.) -

-If no colors have yet been allocated in the image, -gdImageColorClosest returns -1. -

-This function is most useful as a backup method for choosing -a drawing color when an image already contains -gdMaxColors (256) colors and -no more can be allocated. (This is not uncommon when -working with existing GIF files that already use many colors.) -See gdImageColorExact -for a method of locating exact matches only. -

-... inside a function ...
-gdImagePtr im;
-FILE *in;
-int red;
-/* Let's suppose that photo.gif is a scanned photograph with
-	many colors. */
-in = fopen("photo.gif", "rb");
-im = gdImageCreateFromGif(in);
-fclose(in);
-/* Try to allocate red directly */
-red = gdImageColorAllocate(im, 255, 0, 0);	
-/* If we fail to allocate red... */
-if (red == (-1)) {
-	/* Find the closest color instead. */
-	red = gdImageColorClosest(im, 255, 0, 0);
-}
-/* Draw a dashed line from the upper left corner to the lower right corner */
-gdImageDashedLine(im, 0, 0, 99, 99, red);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
-int gdImageColorExact(gdImagePtr im, int r, int g, int b) -(FUNCTION) -
-gdImageColorExact searches the colors which have been -defined thus far in the image specified and returns the -index of the first color with RGB values which exactly -match those of the request. If no allocated color matches the -request precisely, gdImageColorExact returns -1. -See gdImageColorClosest -for a way to find the color closest to the color requested. -
-... inside a function ...
-gdImagePtr im;
-int red;
-in = fopen("photo.gif", "rb");
-im = gdImageCreateFromGif(in);
-fclose(in);
-/* The image may already contain red; if it does, we'll save a slot
-	in the color table by using that color. */
-/* Try to allocate red directly */
-red = gdImageColorExact(im, 255, 0, 0);
-/* If red isn't already present... */
-if (red == (-1)) {
-	/* Second best: try to allocate it directly. */
-	red = gdImageColorAllocate(im, 255, 0, 0);	
-	/* Out of colors, so find the closest color instead. */
-	red = gdImageColorClosest(im, 255, 0, 0);
-}
-/* Draw a dashed line from the upper left corner to the lower right corner */
-gdImageDashedLine(im, 0, 0, 99, 99, red);
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
-int gdImageColorsTotal(gdImagePtr im) -(MACRO) -
-gdImageColorsTotal is a macro which returns the number of -colors currently allocated in the image. Use this macro -to obtain this information; do not access the structure -directly. -
-int gdImageColorRed(gdImagePtr im, int c) -(MACRO) -
-gdImageColorRed is a macro which returns the red portion -of the specified color in the image. Use this macro -to obtain this information; do not access the structure -directly. -
-int gdImageColorGreen(gdImagePtr im, int c) -(MACRO) -
-gdImageColorGreen is a macro which returns the green portion -of the specified color in the image. Use this macro -to obtain this information; do not access the structure -directly. -
-int gdImageColorBlue(gdImagePtr im, int c) -(MACRO) -
-gdImageColorBlue is a macro which returns the green portion -of the specified color in the image. Use this macro -to obtain this information; do not access the structure -directly. -
-int gdImageGetInterlaced(gdImagePtr im) -(MACRO) -
-gdImageGetInterlaced is a macro which returns true (1) -if the image is interlaced, false (0) if not. -Use this macro to obtain this information; do not -access the structure directly. -See gdImageInterlace for -a means of interlacing images. -
-int gdImageGetTransparent(gdImagePtr im) -(MACRO) -
-gdImageGetTransparent is a macro which returns the -current transparent color index in the image. -If there is no transparent color, gdImageGetTransparent -returns -1. Use this macro to obtain this information; do not -access the structure directly. -
-void gdImageColorDeallocate(gdImagePtr im, int color) -(FUNCTION) -
-gdImageColorDeallocate marks the specified color as being -available for reuse. It does not attempt to determine whether -the color index is still in use in the image. After a call -to this function, the next call to -gdImageColorAllocate -for the same image will set new RGB values for that -color index, changing the color of any pixels which -have that index as a result. If multiple calls to -gdImageColorDeallocate are made consecutively, the lowest-numbered -index among them will be reused by the next - gdImageColorAllocate call. -
-... inside a function ...
-gdImagePtr im;
-int red, blue;
-in = fopen("photo.gif", "rb");
-im = gdImageCreateFromGif(in);
-fclose(in);
-/* Look for red in the color table. */
-red = gdImageColorExact(im, 255, 0, 0);
-/* If red is present... */
-if (red != (-1)) {
-	/* Deallocate it. */
-	gdImageColorDeallocate(im, red);
-	/* Allocate blue, reusing slot in table.
-		Existing red pixels will change color. */
-	blue = gdImageColorAllocate(im, 0, 0, 255);
-} 
-/* ... Do something with the image, such as saving it to a file... */
-/* Destroy it */
-gdImageDestroy(im);
-
-
-void gdImageColorTransparent(gdImagePtr im, int color) -(FUNCTION) -
-gdImageColorTransparent sets the transparent color index -for the specified image to the specified index. To indicate -that there should be no transparent color, invoke -gdImageColorTransparent with a color index of -1. -

-The color index used should be an index -allocated by gdImageColorAllocate, -whether explicitly invoked by your code or implicitly -invoked by loading an image. -In order to ensure that your image has a reasonable appearance -when viewed by users who do not have transparent background -capabilities, be sure to give reasonable RGB values to the -color you allocate for use as a transparent color, -even though it will be transparent on systems -that support transparency. -

-... inside a function ...
-gdImagePtr im;
-int black;
-FILE *in, *out;
-in = fopen("photo.gif", "rb");
-im = gdImageCreateFromGif(in);
-fclose(in);
-/* Look for black in the color table and make it transparent. */
-black = gdImageColorExact(im, 0, 0, 0);
-/* If black is present... */
-if (black != (-1)) {
-	/* Make it transparent */
-	gdImageColorTransparent(im, black);
-} 
-/* Save the newly-transparent image back to the file */
-out = fopen("photo.gif", "wb");
-gdImageGif(im, out);
-fclose(out);
-/* Destroy it */
-gdImageDestroy(im);
-
-
-

Copying and resizing functions

-
-
void gdImageCopy(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int srcY, int w, int h) - (FUNCTION) -
-gdImageCopy is used to copy a rectangular portion of one image to -another image. (For a way of stretching or shrinking the image -in the process, see -gdImageCopyResized.) -

-The dst argument is the destination image to which the -region will be copied. The src argument is the source -image from which the region is copied. The dstX -and dstY arguments specify the point in the destination -image to which the region will be copied. The srcX -and srcY arguments specify the upper left corner -of the region in the source image. The w -and h arguments specify the width and height -of the region. -

-When you copy a region from one location in an image to another -location in the same image, gdImageCopy will perform as expected -unless the regions overlap, in which case the result is -unpredictable. -

-Important note on copying between images: since -different images do -not necessarily have the same color tables, pixels are not simply set to the -same color index values to copy them. gdImageCopy will attempt -to find an identical RGB value in the destination image for -each pixel in the copied portion of the source image by -invoking gdImageColorExact. If -such a value is not found, gdImageCopy will attempt to -allocate colors as needed using -gdImageColorAllocate. If both of these methods fail, -gdImageCopy will invoke -gdImageColorClosest to find the color in the destination -image which most closely approximates the color of the -pixel being copied. -

-... Inside a function ...
-gdImagePtr im_in;
-gdImagePtr im_out;
-int x, y;
-FILE *in;
-FILE *out;
-/* Load a small gif to tile the larger one with */
-in = fopen("small.gif", "rb");
-im_in = gdImageCreateFromGif(in);
-fclose(in);
-/* Make the output image four times as large on both axes */
-im_out = gdImageCreate(im_in->sx * 4, im_in->sy * 4); 
-/* Now tile the larger image using the smaller one */
-for (y = 0; (y < 4); y++) {
-	for (x = 0; (x < 4); x++) {
-		gdImageCopy(im_out, im_in, 
-			x * im_in->sx, y * im_in->sy,
-			0, 0,
-			im_in->sx, im_in->sy);
-	}
-}
-out = fopen("tiled.gif", "wb");
-gdImageGif(im_out, out);
-fclose(out);
-gdImageDestroy(im_in);
-gdImageDestroy(im_out);
-
-
void gdImageCopyResized(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int srcY, int destW, int destH, int srcW, int srcH) - (FUNCTION) -
-gdImageCopyResized is used to copy a rectangular portion of one image to -another image. The X and Y dimensions of the original region and the -destination region can vary, resulting in stretching or shrinking of -the region as appropriate. (For a simpler version of this function -which does not deal with resizing, see -gdImageCopy.) -

-The dst argument is the destination image to which the -region will be copied. The src argument is the source -image from which the region is copied. The dstX -and dstY arguments specify the point in the destination -image to which the region will be copied. The srcX -and srcY arguments specify the upper left corner -of the region in the source image. The dstW -and dstH arguments specify the width and height -of the destination region. The srcW -and srcH arguments specify the width and height -of the source region and can differ from the destination size, -allowing a region to be scaled during the copying process. -

-When you copy a region from one location in an image to another -location in the same image, gdImageCopy will perform as expected -unless the regions overlap, in which case the result is -unpredictable. If this presents a problem, create a scratch image -in which to keep intermediate results. -

-Important note on copying between images: since images -do not necessarily have the same color tables, pixels are not simply set -to the same color index values to copy them. gdImageCopy will attempt -to find an identical RGB value in the destination image for -each pixel in the copied portion of the source image by -invoking gdImageColorExact. If -such a value is not found, gdImageCopy will attempt to -allocate colors as needed using -gdImageColorAllocate. If both of these methods fail, -gdImageCopy will invoke -gdImageColorClosest to find the color in the destination -image which most closely approximates the color of the -pixel being copied. -

-... Inside a function ...
-gdImagePtr im_in;
-gdImagePtr im_out;
-int x, y;
-FILE *in;
-FILE *out;
-/* Load a small gif to expand in the larger one */
-in = fopen("small.gif", "rb");
-im_in = gdImageCreateFromGif(in);
-fclose(in);
-/* Make the output image four times as large on both axes */
-im_out = gdImageCreate(im_in->sx * 4, im_in->sy * 4); 
-/* Now copy the smaller image, but four times larger */
-gdImageCopyResized(im_out, im_in, 0, 0, 0, 0, 
-	im_out->sx, im_out->sy,
-	im_in->sx, im_in->sy);	 
-out = fopen("large.gif", "wb");
-gdImageGif(im_out, out);
-fclose(out);
-gdImageDestroy(im_in);
-gdImageDestroy(im_out);
-
-
-

Miscellaneous Functions

-
-
gdImageInterlace(gdImagePtr im, int interlace) (FUNCTION) -
-gdImageInterlace is used to determine whether an image should be stored -in a linear fashion, in which lines will appear on the display from -first to last, or in an interlaced fashion, in which the image -will "fade in" over several passes. By default, images are not -interlaced. -

-A nonzero value for the interlace argument turns on interlace; -a zero value turns it off. Note that interlace has no effect -on other functions, and has no meaning unless you save the -image in GIF format; the gd and xbm formats do not support -interlace. -

-When a GIF is loaded with gdImageCreateFromGif -, interlace will be set according to the setting in the GIF file. -

-Note that many GIF viewers and web browsers do not support -interlace. However, the interlaced GIF should still display; it -will simply appear all at once, just as other images do. -

-gdImagePtr im;
-FILE *out;
-/* ... Create or load the image... */
-
-/* Now turn on interlace */
-gdImageInterlace(im, 1); 
-/* And open an output file */
-out = fopen("test.gif", "wb");
-/* And save the image */
-gdImageGif(im, out);
-fclose(out);
-gdImageDestroy(im);
-
-
-

Constants

-
-
gdBrushed (CONSTANT) -
-Used in place of a color when invoking a line-drawing -function such as gdImageLine -or gdImageRectangle. -When gdBrushed is used as the color, the brush -image set with gdImageSetBrush -is drawn in place of each pixel of the line (the brush is -usually larger than one pixel, creating the effect -of a wide paintbrush). See also -gdStyledBrushed for a way -to draw broken lines with a series of distinct copies of an image. -
gdMaxColors(CONSTANT) -
-The constant 256. This is the maximum number of colors in a GIF file -according to the GIF standard, and is also the maximum number of -colors in a gd image. -
gdStyled (CONSTANT) -
-Used in place of a color when invoking a line-drawing -function such as gdImageLine -or gdImageRectangle. -When gdStyled is used as the color, the colors of the pixels are -drawn successively from the style that has been -set with gdImageSetStyle. -If the color of a pixel is equal to -gdTransparent, that pixel -is not altered. (This mechanism is completely unrelated -to the "transparent color" of the image itself; see -gdImageColorTransparent -gdImageColorTransparent for that mechanism.) See also - gdStyledBrushed. -
gdStyledBrushed (CONSTANT) -
-Used in place of a color when invoking a line-drawing -function such as gdImageLine -or gdImageRectangle. -When gdStyledBrushed is used as the color, the brush -image set with gdImageSetBrush -is drawn at each pixel of the line, providing that the -style set with gdImageSetStyle -contains a nonzero value (OR gdTransparent, which -does not equal zero but is supported for consistency) -for the current pixel. (Pixels are drawn successively from the style as the -line is drawn, returning to the beginning when the -available pixels in the style are exhausted.) Note that -this differs from the behavior of gdStyled, -in which the values in the style are used as actual -pixel colors, except for gdTransparent. -
gdDashSize (CONSTANT) -
-The length of a dash in a dashed line. Defined to be 4 for -backwards compatibility with programs that use -gdImageDashedLine. New -programs should use -gdImageSetStyle and call the standard -gdImageLine function -with the special "color" -gdStyled or gdStyledBrushed. -
gdTiled (CONSTANT) -
-Used in place of a normal color in -gdImageFilledRectangle, -gdImageFilledPolygon, -gdImageFill, and -gdImageFillToBorder. gdTiled selects a pixel from the -tile image set with gdImageSetTile -in such a way as to ensure that the filled area will be -tiled with copies of the tile image. See the discussions of -gdImageFill and -gdImageFillToBorder for special -restrictions regarding those functions. -
gdTransparent (CONSTANT) -
-Used in place of a normal color in a style to be set with -gdImageSetStyle. -gdTransparent is not the transparent -color index of the image; for that functionality please -see gdImageColorTransparent. -
-

About the additional .gd image file format

 -In addition to reading and writing the GIF format and reading the -X Bitmap format, gd has the capability to read and write its -own ".gd" format. This format is not intended for -general purpose use and should never be used to distribute -images. It is not a compressed format. Its purpose is solely to -allow very fast loading of images your program needs often in -order to build other images for output. If you are experiencing -performance problems when loading large, fixed GIF images your -program needs to produce its output images, you may wish -to examine the functions -gdImageCreateFromGd and gdImageGd, -which read and write .gd format images. -

-The program "giftogd.c" is provided as a simple way of converting -.gif files to .gd format. I emphasize again that you will not -need to use this format unless you have a need for high-speed loading -of a few frequently-used images in your program. -

Please tell us you're using gd!

-When you contact us and let us know you are using gd, -you help us justify the time spent in maintaining and improving -it. So please let us know. If the results are publicly -visible on the web, a URL is a wonderful thing to receive, but -if it's not a publicly visible project, a simple note is just -as welcome. -

If you have problems

 -If you have any difficulties with gd, feel free to contact -the author, Thomas Boutell. -Be sure to read this manual carefully first. -

Alphabetical quick index

-gdBrushed | -gdDashSize | -gdFont | -gdFontPtr | -gdImage | -gdImageArc | -gdImageBlue | -gdImageBoundsSafe | -gdImageChar | -gdImageCharUp | -gdImageColorAllocate | -gdImageColorClosest | -gdImageColorDeallocate | -gdImageColorExact | -gdImageColorTransparent | -gdImageCopy | -gdImageCopyResized | -gdImageCreate | -gdImageCreateFromGd | -gdImageCreateFromGif | -gdImageCreateFromXbm | -gdImageDashedLine | -gdImageDestroy | -gdImageFill | -gdImageFillToBorder | -gdImageFilledRectangle | -gdImageGd | -gdImageGetInterlaced | -gdImageGetPixel | -gdImageGetTransparent | -gdImageGif | -gdImageGreen | -gdImageInterlace | -gdImageLine | -gdImageFilledPolygon | -gdImagePolygon | -gdImagePtr | -gdImageRectangle | -gdImageRed | -gdImageSetBrush | -gdImageSetPixel | -gdImageSetStyle | -gdImageSetTile | -gdImageString | -gdImageString16 | -gdImageStringUp | -gdImageStringUp16 | -gdMaxColors | -gdPoint | -gdStyled | -gdStyledBrushed | -gdTiled | -gdTransparent -

- -Boutell.Com, Inc. - - diff --git a/libraries/gd1.3/mathmake.c b/libraries/gd1.3/mathmake.c deleted file mode 100644 index 5f3987a..0000000 --- a/libraries/gd1.3/mathmake.c +++ /dev/null @@ -1,43 +0,0 @@ -#include -#include - -#define scale 1024 - -int basis[91]; -int cost[360]; - -main(void) { - int i; - printf("#define costScale %d\n", scale); - printf("int cost[] = {\n "); - for (i=0; (i <= 90); i++) { - basis[i] = cos((double)i * .0174532925) * scale; - } - for (i=0; (i < 90); i++) { - printf("%d,\n ", cost[i] = basis[i]); - } - for (i=90; (i < 180); i++) { - printf("%d,\n ", cost[i] = -basis[180-i]); - } - for (i=180; (i < 270); i++) { - printf("%d,\n ", cost[i] = -basis[i-180]); - } - for (i=270; (i < 359); i++) { - printf("%d,\n ", cost[i] = basis[360-i]); - } - printf("%d\n", cost[359] = basis[1]); - printf("};\n"); - printf("#define sintScale %d\n", scale); - printf("int sint[] = {\n "); - for (i=0; (i<360); i++) { - int val; - val = cost[(i + 270) % 360]; - if (i != 359) { - printf("%d,\n ", val); - } else { - printf("%d\n", val); - } - } - printf("};\n"); -} - diff --git a/libraries/gd1.3/mtables.c b/libraries/gd1.3/mtables.c deleted file mode 100644 index dd8dec9..0000000 --- a/libraries/gd1.3/mtables.c +++ /dev/null @@ -1,726 +0,0 @@ -#define costScale 1024 -int cost[] = { - 1024, - 1023, - 1023, - 1022, - 1021, - 1020, - 1018, - 1016, - 1014, - 1011, - 1008, - 1005, - 1001, - 997, - 993, - 989, - 984, - 979, - 973, - 968, - 962, - 955, - 949, - 942, - 935, - 928, - 920, - 912, - 904, - 895, - 886, - 877, - 868, - 858, - 848, - 838, - 828, - 817, - 806, - 795, - 784, - 772, - 760, - 748, - 736, - 724, - 711, - 698, - 685, - 671, - 658, - 644, - 630, - 616, - 601, - 587, - 572, - 557, - 542, - 527, - 512, - 496, - 480, - 464, - 448, - 432, - 416, - 400, - 383, - 366, - 350, - 333, - 316, - 299, - 282, - 265, - 247, - 230, - 212, - 195, - 177, - 160, - 142, - 124, - 107, - 89, - 71, - 53, - 35, - 17, - 0, - -17, - -35, - -53, - -71, - -89, - -107, - -124, - -142, - -160, - -177, - -195, - -212, - -230, - -247, - -265, - -282, - -299, - -316, - -333, - -350, - -366, - -383, - -400, - -416, - -432, - -448, - -464, - -480, - -496, - -512, - -527, - -542, - -557, - -572, - -587, - -601, - -616, - -630, - -644, - -658, - -671, - -685, - -698, - -711, - -724, - -736, - -748, - -760, - -772, - -784, - -795, - -806, - -817, - -828, - -838, - -848, - -858, - -868, - -877, - -886, - -895, - -904, - -912, - -920, - -928, - -935, - -942, - -949, - -955, - -962, - -968, - -973, - -979, - -984, - -989, - -993, - -997, - -1001, - -1005, - -1008, - -1011, - -1014, - -1016, - -1018, - -1020, - -1021, - -1022, - -1023, - -1023, - -1024, - -1023, - -1023, - -1022, - -1021, - -1020, - -1018, - -1016, - -1014, - -1011, - -1008, - -1005, - -1001, - -997, - -993, - -989, - -984, - -979, - -973, - -968, - -962, - -955, - -949, - -942, - -935, - -928, - -920, - -912, - -904, - -895, - -886, - -877, - -868, - -858, - -848, - -838, - -828, - -817, - -806, - -795, - -784, - -772, - -760, - -748, - -736, - -724, - -711, - -698, - -685, - -671, - -658, - -644, - -630, - -616, - -601, - -587, - -572, - -557, - -542, - -527, - -512, - -496, - -480, - -464, - -448, - -432, - -416, - -400, - -383, - -366, - -350, - -333, - -316, - -299, - -282, - -265, - -247, - -230, - -212, - -195, - -177, - -160, - -142, - -124, - -107, - -89, - -71, - -53, - -35, - -17, - 0, - 17, - 35, - 53, - 71, - 89, - 107, - 124, - 142, - 160, - 177, - 195, - 212, - 230, - 247, - 265, - 282, - 299, - 316, - 333, - 350, - 366, - 383, - 400, - 416, - 432, - 448, - 464, - 480, - 496, - 512, - 527, - 542, - 557, - 572, - 587, - 601, - 616, - 630, - 644, - 658, - 671, - 685, - 698, - 711, - 724, - 736, - 748, - 760, - 772, - 784, - 795, - 806, - 817, - 828, - 838, - 848, - 858, - 868, - 877, - 886, - 895, - 904, - 912, - 920, - 928, - 935, - 942, - 949, - 955, - 962, - 968, - 973, - 979, - 984, - 989, - 993, - 997, - 1001, - 1005, - 1008, - 1011, - 1014, - 1016, - 1018, - 1020, - 1021, - 1022, - 1023, - 1023 -}; -#define sintScale 1024 -int sint[] = { - 0, - 17, - 35, - 53, - 71, - 89, - 107, - 124, - 142, - 160, - 177, - 195, - 212, - 230, - 247, - 265, - 282, - 299, - 316, - 333, - 350, - 366, - 383, - 400, - 416, - 432, - 448, - 464, - 480, - 496, - 512, - 527, - 542, - 557, - 572, - 587, - 601, - 616, - 630, - 644, - 658, - 671, - 685, - 698, - 711, - 724, - 736, - 748, - 760, - 772, - 784, - 795, - 806, - 817, - 828, - 838, - 848, - 858, - 868, - 877, - 886, - 895, - 904, - 912, - 920, - 928, - 935, - 942, - 949, - 955, - 962, - 968, - 973, - 979, - 984, - 989, - 993, - 997, - 1001, - 1005, - 1008, - 1011, - 1014, - 1016, - 1018, - 1020, - 1021, - 1022, - 1023, - 1023, - 1024, - 1023, - 1023, - 1022, - 1021, - 1020, - 1018, - 1016, - 1014, - 1011, - 1008, - 1005, - 1001, - 997, - 993, - 989, - 984, - 979, - 973, - 968, - 962, - 955, - 949, - 942, - 935, - 928, - 920, - 912, - 904, - 895, - 886, - 877, - 868, - 858, - 848, - 838, - 828, - 817, - 806, - 795, - 784, - 772, - 760, - 748, - 736, - 724, - 711, - 698, - 685, - 671, - 658, - 644, - 630, - 616, - 601, - 587, - 572, - 557, - 542, - 527, - 512, - 496, - 480, - 464, - 448, - 432, - 416, - 400, - 383, - 366, - 350, - 333, - 316, - 299, - 282, - 265, - 247, - 230, - 212, - 195, - 177, - 160, - 142, - 124, - 107, - 89, - 71, - 53, - 35, - 17, - 0, - -17, - -35, - -53, - -71, - -89, - -107, - -124, - -142, - -160, - -177, - -195, - -212, - -230, - -247, - -265, - -282, - -299, - -316, - -333, - -350, - -366, - -383, - -400, - -416, - -432, - -448, - -464, - -480, - -496, - -512, - -527, - -542, - -557, - -572, - -587, - -601, - -616, - -630, - -644, - -658, - -671, - -685, - -698, - -711, - -724, - -736, - -748, - -760, - -772, - -784, - -795, - -806, - -817, - -828, - -838, - -848, - -858, - -868, - -877, - -886, - -895, - -904, - -912, - -920, - -928, - -935, - -942, - -949, - -955, - -962, - -968, - -973, - -979, - -984, - -989, - -993, - -997, - -1001, - -1005, - -1008, - -1011, - -1014, - -1016, - -1018, - -1020, - -1021, - -1022, - -1023, - -1023, - -1024, - -1023, - -1023, - -1022, - -1021, - -1020, - -1018, - -1016, - -1014, - -1011, - -1008, - -1005, - -1001, - -997, - -993, - -989, - -984, - -979, - -973, - -968, - -962, - -955, - -949, - -942, - -935, - -928, - -920, - -912, - -904, - -895, - -886, - -877, - -868, - -858, - -848, - -838, - -828, - -817, - -806, - -795, - -784, - -772, - -760, - -748, - -736, - -724, - -711, - -698, - -685, - -671, - -658, - -644, - -630, - -616, - -601, - -587, - -572, - -557, - -542, - -527, - -512, - -496, - -480, - -464, - -448, - -432, - -416, - -400, - -383, - -366, - -350, - -333, - -316, - -299, - -282, - -265, - -247, - -230, - -212, - -195, - -177, - -160, - -142, - -124, - -107, - -89, - -71, - -53, - -35, - -17 -}; diff --git a/libraries/gd1.3/readme.txt b/libraries/gd1.3/readme.txt deleted file mode 100644 index 5fb9896..0000000 --- a/libraries/gd1.3/readme.txt +++ /dev/null @@ -1,1837 +0,0 @@ -SEE INDEX.HTML FOR AN EASILY BROWSED HYPERTEXT VERSION OF THIS MANUAL. - -* * * - - gd 1.3 - -A graphics library for fast GIF creation - -Follow this link to the latest version of this document. - - Table of Contents - - * Credits and license terms - * What's new in version 1.3? - * What is gd? - * What if I want to use another programming language? - * What else do I need to use gd? - * How do I get gd? - * How do I build gd? - * gd basics: using gd in your program - * webgif: a useful example - * Function and type reference by category - * About the additional .gd image file format - * Please tell us you're using gd! - * If you have problems - * Alphabetical quick index - - Up to the Boutell.Com, Inc. Home Page - - Credits and license terms - - In order to resolve any possible confusion regarding the authorship of - gd, the following copyright statement covers all of the authors who - have required such a statement. Although his LZW compression code no - longer appears in gd, the authors wish to thank David Rowley for the - original LZW-based GIF compression code, which has been removed due to - patent concerns. If you are aware of any oversights in this copyright - notice, please contact Thomas Boutell who will be pleased to correct - them. - -COPYRIGHT STATEMENT FOLLOWS THIS LINE - - Portions copyright 1994, 1995, 1996, 1997, 1998, by Cold Spring - Harbor Laboratory. Funded under Grant P41-RR02188 by the National - Institutes of Health. - - Portions copyright 1996, 1997, 1998, by Boutell.Com, Inc. - - GIF decompression code copyright 1990, 1991, 1993, by David Koblas - (koblas@netcom.com). - - Non-LZW-based GIF compression code copyright 1998, by Hutchison - Avenue Software Corporation (http://www.hasc.com/, info@hasc.com). - - Permission has been granted to copy and distribute gd in any - context, including a commercial application, provided that this - notice is present in user-accessible supporting documentation. - - This does not affect your ownership of the derived work itself, and - the intent is to assure proper credit for the authors of gd, not to - interfere with your productive use of gd. If you have questions, - ask. "Derived works" includes all programs that utilize the - library. Credit must be given in user-accessible documentation. - - Permission to use, copy, modify, and distribute this software and - its documentation for any purpose and without fee is hereby - granted, provided that the above copyright notice appear in all - copies and that both that copyright notice and this permission - notice appear in supporting documentation. This software is - provided "as is" without express or implied warranty. - -END OF COPYRIGHT STATEMENT - - What is gd? - - gd is a graphics library. It allows your code to quickly draw images - complete with lines, arcs, text, multiple colors, cut and paste from - other images, and flood fills, and write out the result as a .GIF - file. This is particularly useful in World Wide Web applications, - where .GIF is the format used for inline images. - - gd is not a paint program. If you are looking for a paint program, you - are looking in the wrong place. If you are not a programmer, you are - looking in the wrong place. - - gd does not provide for every possible desirable graphics operation. - It is not necessary or desirable for gd to become a kitchen-sink - graphics package, but version 1.3 incorporates most of the commonly - requested features for an 8-bit 2D package. Support for scalable - fonts, and truecolor images, JPEG and PNG is planned for version 2.0. - Version 1.3 was released to correct longstanding bugs and provide an - LZW-free GIF compression routine. - - What if I want to use another programming language? - - Perl - - gd can also be used from Perl, courtesy of Lincoln Stein's GD.pm - library, which uses gd as the basis for a set of Perl 5.x classes. - GD.pm is based on gd 1.1.1 but gd 1.2 should be compatible. - - Any Language - - There are, at the moment, at least three simple interpreters that - perform gd operations. You can output the desired commands to a simple - text file from whatever scripting language you prefer to use, then - invoke the interpreter. - - These packages are based on gd 1.2 as of this writing but should be - compatible with gd 1.3 with minimal tweaking. - * tgd, by Bradley K. Sherman - * fly, by Martin Gleeson - - What's new in version 1.3? - - Version 1.3 features the following changes: - - Non-LZW-based GIF compression code - Version 1.3 contains GIF compression code that uses simple Run - Length Encoding instead of LZW compression, while still - retaining compatibility with normal LZW-based GIF decoders - (your browser will still like your GIFs). LZW compression is - patented by Unisys. This is why there have been no new versions - of gd for a long time. THANKS to Hutchison Avenue Software - Corporation for contributing this code. THE NEW CODE PRODUCES - LARGER GIFS AND IS NOT WELL SUITED TO PHOTOGRAPHIC IMAGES. THIS - IS A LEGAL ISSUE. IT IS NOT A QUESTION OF TECHNICAL SKILL. - PLEASE DON'T COMPLAIN ABOUT THE SIZE OF GIF OUTPUT. THANKS! - - 8-bit fonts, and 8-bit font support - This improves support for European languages. Thanks are due to - Honza Pazdziora and also to Jan Pazdziora . Also see the - provided bdftogd Perl script if you wish to convert fixed-width - X11 fonts to gd fonts. - - 16-bit font support (no fonts provided) - Although no such fonts are provided in the distribution, fonts - containing more than 256 characters should work if the - gdImageString16 and gdImageStringUp16 routines are used. - - Improvements to the "webgif" example/utility - The "webgif" utility is now a slightly more useful application. - Thanks to Brian Dowling for this code. - - Corrections to the color resolution field of GIF output - Thanks to Bruno Aureli. - - Fixed polygon fills - A one-line patch for the infamous polygon fill bug, courtesy of - Jim Mason. I believe this fix is sufficient. However, if you - find a situation where polygon fills still fail to behave - properly, please send code that demonstrates the problem, and a - fix if you have one. Verifying the fix is important. - - Row-major, not column-major - Internally, gd now represents the array of pixels as an array - of rows of pixels, rather than an array of columns of pixels. - This improves the performance of compression and decompression - routines slightly, because horizontally adjacent pixels are now - next to each other in memory. This should not affect properly - written gd applications, but applications that directly - manipulate the pixels array will require changes. - - What else do I need to use gd? - - To use gd, you will need an ANSI C compiler. All popular Windows 95 - and NT C compilers are ANSI C compliant. Any full-ANSI-standard C - compiler should be adequate. The cc compiler released with SunOS 4.1.3 - is not an ANSI C compiler. Most Unix users who do not already have gcc - should get it. gcc is free, ANSI compliant and a de facto industry - standard. Ask your ISP why it is missing. - - You will also want a GIF viewer, if you do not already have one for - your system, since you will need a good way to check the results of - your work. Any web browser will work, but you might be happier with a - package like Lview Pro for Windows or xv for X. There are GIF viewers - available for every graphics-capable computer out there, so consult - newsgroups relevant to your particular system. - - How do I get gd? - - By HTTP - - * Gzipped Tar File (Unix) - * .ZIP File (Windows) - - By FTP - - * Gzipped Tar File (Unix) - * .ZIP File (Windows) - - How do I build gd? - - In order to build gd, you must first unpack the archive you have - downloaded. If you are not familiar with tar and gunzip (Unix) or ZIP - (Windows), please consult with an experienced user of your system. - Sorry, we cannot answer questions about basic Internet skills. - - Unpacking the archive will produce a directory called "gd1.3". - - For Unix - - cd to the gd1.3 directory and examine the Makefile, which you will - probably need to change slightly depending on your operating system - and your needs. - - For Windows, Mac, Et Cetera - - Create a project using your favorite programming environment. Copy all - of the gd files to the project directory. Add gd.c to your project. - Add other source files as appropriate. Learning the basic skills of - creating projects with your chosen C environment is up to you. - - Now, to build the demonstration program, just type "make gddemo" if - you are working in a command-line environment, or build a project that - includes gddemo.c if you are using a graphical environment. If all - goes well, the program "gddemo" will be compiled and linked without - incident. Depending on your system you may need to edit the Makefile. - Understanding the basic techniques of compiling and linking programs - on your system is up to you. - - You have now built a demonstration program which shows off the - capabilities of gd. To see it in action, type "gddemo". - - gddemo should execute without incident, creating the file demoout.gif. - (Note there is also a file named demoin.gif, which is provided in the - package as part of the demonstration.) - - Display demoout.gif in your GIF viewer. The image should be 128x128 - pixels and should contain an image of the space shuttle with quite a - lot of graphical elements drawn on top of it. - - (If you are missing the demoin.gif file, the other items should appear - anyway.) - - Look at demoin.gif to see the original space shuttle image which was - scaled and copied into the output image. - - gd basics: using gd in your program - - gd lets you create GIF images on the fly. To use gd in your program, - include the file gd.h, and link with the libgd.a library produced by - "make libgd.a", under Unix. Under other operating systems you will add - gd.c to your own project. - - If you want to use the provided fonts, include gdfontt.h, gdfonts.h, - gdfontmb.h, gdfontl.h and/or gdfontg.h. If you are not using the - provided Makefile and/or a library-based approach, be sure to include - the source modules as well in your project. (They may be too large for - 16-bit memory models, that is, 16-bit DOS and Windows.) - - Here is a short example program. (For a more advanced example, see - gddemo.c, included in the distribution. gddemo.c is NOT the same - program; it demonstrates additional features!) - -/* Bring in gd library functions */ -#include "gd.h" - -/* Bring in standard I/O so we can output the GIF to a file */ -#include - -int main() { - /* Declare the image */ - gdImagePtr im; - /* Declare an output file */ - FILE *out; - /* Declare color indexes */ - int black; - int white; - - /* Allocate the image: 64 pixels across by 64 pixels tall */ - im = gdImageCreate(64, 64); - - /* Allocate the color black (red, green and blue all minimum). - Since this is the first color in a new image, it will - be the background color. */ - black = gdImageColorAllocate(im, 0, 0, 0); - - /* Allocate the color white (red, green and blue all maximum). */ - white = gdImageColorAllocate(im, 255, 255, 255); - - /* Draw a line from the upper left to the lower right, - using white color index. */ - gdImageLine(im, 0, 0, 63, 63, white); - - /* Open a file for writing. "wb" means "write binary", important - under MSDOS, harmless under Unix. */ - out = fopen("test.gif", "wb"); - - /* Output the image to the disk file. */ - gdImageGif(im, out); - - /* Close the file. */ - fclose(out); - - /* Destroy the image in memory. */ - gdImageDestroy(im); -} - - When executed, this program creates an image, allocates two colors - (the first color allocated becomes the background color), draws a - diagonal line (note that 0, 0 is the upper left corner), writes the - image to a GIF file, and destroys the image. - - The above example program should give you an idea of how the package - works. gd provides many additional functions, which are listed in the - following reference chapters, complete with code snippets - demonstrating each. There is also an alphabetical index. - - Webgif: a more powerful gd example - - Webgif is a simple utility program to manipulate GIFs from the command - line. It is written for Unix and similar command-line systems, but - should be easily adapted for other environments. Webgif allows you to - set transparency and interlacing and output interesting information - about the GIF in question. - - webgif.c is provided in the distribution. Unix users can simply type - "make webgif" to compile the program. Type "webgif" with no arguments - to see the available options. - -Function and type reference - - * Types - * Image creation, destruction, loading and saving - * Drawing, styling, brushing, tiling and filling functions - * Query functions (not color-related) - * Font and text-handling functions - * Color handling functions - * Copying and resizing functions - * Miscellaneous Functions - * Constants - - Types - - gdImage(TYPE) - The data structure in which gd stores images. gdImageCreate - returns a pointer to this type, and the other functions expect - to receive a pointer to this type as their first argument. You - may read the members sx (size on X axis), sy (size on Y axis), - colorsTotal (total colors), red (red component of colors; an - array of 256 integers between 0 and 255), green (green - component of colors, as above), blue (blue component of colors, - as above), and transparent (index of transparent color, -1 if - none); please do so using the macros provided. Do NOT set the - members directly from your code; use the functions provided. - - -typedef struct { - unsigned char ** pixels; - int sx; - int sy; - int colorsTotal; - int red[gdMaxColors]; - int green[gdMaxColors]; - int blue[gdMaxColors]; - int open[gdMaxColors]; - int transparent; -} gdImage; - - gdImagePtr (TYPE) - A pointer to an image structure. gdImageCreate returns this - type, and the other functions expect it as the first argument. - - gdFont (TYPE) - A font structure. Used to declare the characteristics of a - font. Plese see the files gdfontl.c and gdfontl.h for an - example of the proper declaration of this structure. You can - provide your own font data by providing such a structure and - the associated pixel array. You can determine the width and - height of a single character in a font by examining the w and h - members of the structure. If you will not be creating your own - fonts, you will not need to concern yourself with the rest of - the components of this structure. - - -typedef struct { - /* # of characters in font */ - int nchars; - /* First character is numbered... (usually 32 = space) */ - int offset; - /* Character width and height */ - int w; - int h; - /* Font data; array of characters, one row after another. - Easily included in code, also easily loaded from - data files. */ - char *data; -} gdFont; - - gdFontPtr (TYPE) - A pointer to a font structure. Text-output functions expect - these as their second argument, following the gdImagePtr - argument. Two such pointers are declared in the provided - include files gdfonts.h and gdfontl.h. - - gdPoint (TYPE) - Represents a point in the coordinate space of the image; used - by gdImagePolygon and gdImageFilledPolygon. - - -typedef struct { - int x, y; -} gdPoint, *gdPointPtr; - - gdPointPtr (TYPE) - A pointer to a gdPoint structure; passed as an argument to - gdImagePolygon and gdImageFilledPolygon. - - Image creation, destruction, loading and saving - - gdImageCreate(sx, sy) (FUNCTION) - gdImageCreate is called to create images. Invoke gdImageCreate - with the x and y dimensions of the desired image. gdImageCreate - returns a gdImagePtr to the new image, or NULL if unable to - allocate the image. The image must eventually be destroyed - using gdImageDestroy(). - - -... inside a function ... -gdImagePtr im; -im = gdImageCreate(64, 64); -/* ... Use the image ... */ -gdImageDestroy(im); - - gdImageCreateFromGif(FILE *in) (FUNCTION) - gdImageCreateFromGif is called to load images from GIF format - files. Invoke gdImageCreateFromGif with an already opened - pointer to a file containing the desired image. - gdImageCreateFromGif returns a gdImagePtr to the new image, or - NULL if unable to load the image (most often because the file - is corrupt or does not contain a GIF image). - gdImageCreateFromGif does not close the file. You can inspect - the sx and sy members of the image to determine its size. The - image must eventually be destroyed using gdImageDestroy(). - - -gdImagePtr im; -... inside a function ... -FILE *in; -in = fopen("mygif.gif", "rb"); -im = gdImageCreateFromGif(in); -fclose(in); -/* ... Use the image ... */ -gdImageDestroy(im); - - gdImageCreateFromGd(FILE *in) (FUNCTION) - gdImageCreateFromGd is called to load images from gd format - files. Invoke gdImageCreateFromGd with an already opened - pointer to a file containing the desired image in the gd file - format, which is specific to gd and intended for very fast - loading. (It is not intended for compression; for compression, - use GIF.) gdImageCreateFromGd returns a gdImagePtr to the new - image, or NULL if unable to load the image (most often because - the file is corrupt or does not contain a gd format image). - gdImageCreateFromGd does not close the file. You can inspect - the sx and sy members of the image to determine its size. The - image must eventually be destroyed using gdImageDestroy(). - - -... inside a function ... -gdImagePtr im; -FILE *in; -in = fopen("mygd.gd", "rb"); -im = gdImageCreateFromGd(in); -fclose(in); -/* ... Use the image ... */ -gdImageDestroy(im); - - gdImageCreateFromXbm(FILE *in) (FUNCTION) - gdImageCreateFromXbm is called to load images from X bitmap - format files. Invoke gdImageCreateFromXbm with an already - opened pointer to a file containing the desired image. - gdImageCreateFromXbm returns a gdImagePtr to the new image, or - NULL if unable to load the image (most often because the file - is corrupt or does not contain an X bitmap format image). - gdImageCreateFromXbm does not close the file. You can inspect - the sx and sy members of the image to determine its size. The - image must eventually be destroyed using gdImageDestroy(). - - -... inside a function ... -gdImagePtr im; -FILE *in; -in = fopen("myxbm.xbm", "rb"); -im = gdImageCreateFromXbm(in); -fclose(in); -/* ... Use the image ... */ -gdImageDestroy(im); - - gdImageDestroy(gdImagePtr im) (FUNCTION) - gdImageDestroy is used to free the memory associated with an - image. It is important to invoke gdImageDestroy before exiting - your program or assigning a new image to a gdImagePtr variable. - - -... inside a function ... -gdImagePtr im; -im = gdImageCreate(10, 10); -/* ... Use the image ... */ -/* Now destroy it */ -gdImageDestroy(im); - - void gdImageGif(gdImagePtr im, FILE *out) (FUNCTION) - gdImageGif outputs the specified image to the specified file in - GIF format. The file must be open for writing. Under MSDOS, it - is important to use "wb" as opposed to simply "w" as the mode - when opening the file, and under Unix there is no penalty for - doing so. gdImageGif does not close the file; your code must do - so. - - -... inside a function ... -gdImagePtr im; -int black, white; -FILE *out; -/* Create the image */ -im = gdImageCreate(100, 100); -/* Allocate background */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Allocate drawing color */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Draw rectangle */ -gdImageRectangle(im, 0, 0, 99, 99, black); -/* Open output file in binary mode */ -out = fopen("rect.gif", "wb"); -/* Write GIF */ -gdImageGif(im, out); -/* Close file */ -fclose(out); -/* Destroy image */ -gdImageDestroy(im); - - void gdImageGd(gdImagePtr im, FILE *out) (FUNCTION) - gdImageGd outputs the specified image to the specified file in - the gd image format. The file must be open for writing. Under - MSDOS, it is important to use "wb" as opposed to simply "w" as - the mode when opening the file, and under Unix there is no - penalty for doing so. gdImageGif does not close the file; your - code must do so. - - The gd image format is intended for fast reads and writes of - images your program will need frequently to build other images. - It is not a compressed format, and is not intended for general - use. - - -... inside a function ... -gdImagePtr im; -int black, white; -FILE *out; -/* Create the image */ -im = gdImageCreate(100, 100); -/* Allocate background */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Allocate drawing color */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Draw rectangle */ -gdImageRectangle(im, 0, 0, 99, 99, black); -/* Open output file in binary mode */ -out = fopen("rect.gd", "wb"); -/* Write gd format file */ -gdImageGd(im, out); -/* Close file */ -fclose(out); -/* Destroy image */ -gdImageDestroy(im); - - Drawing Functions - - void gdImageSetPixel(gdImagePtr im, int x, int y, int color) - (FUNCTION) - gdImageSetPixel sets a pixel to a particular color index. - Always use this function or one of the other drawing functions - to access pixels; do not access the pixels of the gdImage - structure directly. - - -... inside a function ... -gdImagePtr im; -int black; -int white; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Set a pixel near the center. */ -gdImageSetPixel(im, 50, 50, white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageLine(gdImagePtr im, int x1, int y1, int x2, int y2, int - color) (FUNCTION) - gdImageLine is used to draw a line between two endpoints (x1,y1 - and x2, y2). The line is drawn using the color index specified. - Note that the color index can be an actual color returned by - gdImageColorAllocate or one of gdStyled, gdBrushed or - gdStyledBrushed. - - -... inside a function ... -gdImagePtr im; -int black; -int white; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Draw a line from the upper left corner to the lower right corner. */ -gdImageLine(im, 0, 0, 99, 99, white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageDashedLine(gdImagePtr im, int x1, int y1, int x2, int y2, - int color) (FUNCTION) - gdImageDashedLine is provided solely for backwards - compatibility with gd 1.0. New programs should draw dashed - lines using the normal gdImageLine function and the new - gdImageSetStyle function. - - gdImageDashedLine is used to draw a dashed line between two - endpoints (x1,y1 and x2, y2). The line is drawn using the color - index specified. The portions of the line that are not drawn - are left transparent so the background is visible. - - -... inside a function ... -gdImagePtr im; -int black; -int white; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Draw a dashed line from the upper left corner to the lower right corner. */ -gdImageDashedLine(im, 0, 0, 99, 99); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImagePolygon(gdImagePtr im, gdPointPtr points, int pointsTotal, - int color) (FUNCTION) - gdImagePolygon is used to draw a polygon with the verticies (at - least 3) specified, using the color index specified. See also - gdImageFilledPolygon. - - -... inside a function ... -gdImagePtr im; -int black; -int white; -/* Points of polygon */ -gdPoint points[3]; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Draw a triangle. */ -points[0].x = 50; -points[0].y = 0; -points[1].x = 99; -points[1].y = 99; -points[2].x = 0; -points[2].y = 99; -gdImagePolygon(im, points, 3, white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageRectangle(gdImagePtr im, int x1, int y1, int x2, int y2, - int color) (FUNCTION) - gdImageRectangle is used to draw a rectangle with the two - corners (upper left first, then lower right) specified, using - the color index specified. - - -... inside a function ... -gdImagePtr im; -int black; -int white; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Draw a rectangle occupying the central area. */ -gdImageRectangle(im, 25, 25, 74, 74, white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageFilledPolygon(gdImagePtr im, gdPointPtr points, int - pointsTotal, int color) (FUNCTION) - gdImageFilledPolygon is used to fill a polygon with the - verticies (at least 3) specified, using the color index - specified. See also gdImagePolygon. - - -... inside a function ... -gdImagePtr im; -int black; -int white; -int red; -/* Points of polygon */ -gdPoint points[3]; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Allocate the color red. */ -red = gdImageColorAllocate(im, 255, 0, 0); -/* Draw a triangle. */ -points[0].x = 50; -points[0].y = 0; -points[1].x = 99; -points[1].y = 99; -points[2].x = 0; -points[2].y = 99; -/* Paint it in white */ -gdImageFilledPolygon(im, points, 3, white); -/* Outline it in red; must be done second */ -gdImagePolygon(im, points, 3, red); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageFilledRectangle(gdImagePtr im, int x1, int y1, int x2, int - y2, int color) (FUNCTION) - gdImageFilledRectangle is used to draw a solid rectangle with - the two corners (upper left first, then lower right) specified, - using the color index specified. - - -... inside a function ... -gdImagePtr im; -int black; -int white; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = int gdImageColorAllocate(im, 255, 255, 255); -/* Draw a filled rectangle occupying the central area. */ -gdImageFilledRectangle(im, 25, 25, 74, 74, white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageArc(gdImagePtr im, int cx, int cy, int w, int h, int s, - int e, int color) (FUNCTION) - gdImageArc is used to draw a partial ellipse centered at the - given point, with the specified width and height in pixels. The - arc begins at the position in degrees specified by s and ends - at the position specified by e. The arc is drawn in the color - specified by the last argument. A circle can be drawn by - beginning from 0 degrees and ending at 360 degrees, with width - and height being equal. e must be greater than s. Values - greater than 360 are interpreted modulo 360. - - -... inside a function ... -gdImagePtr im; -int black; -int white; -im = gdImageCreate(100, 50); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Inscribe an ellipse in the image. */ -gdImageArc(im, 50, 25, 98, 48, 0, 360, white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageFillToBorder(gdImagePtr im, int x, int y, int border, int - color) (FUNCTION) - gdImageFillToBorder floods a portion of the image with the - specified color, beginning at the specified point and stopping - at the specified border color. For a way of flooding an area - defined by the color of the starting point, see gdImageFill. - - The border color cannot be a special color such as gdTiled; it - must be a proper solid color. The fill color can be, however. - - Note that gdImageFillToBorder is recursive. It is not the most - naive implementation possible, and the implementation is - expected to improve, but there will always be degenerate cases - in which the stack can become very deep. This can be a problem - in MSDOS and MS Windows environments. (Of course, in a Unix or - NT environment with a proper stack, this is not a problem at - all.) - - -... inside a function ... -gdImagePtr im; -int black; -int white; -int red; -im = gdImageCreate(100, 50); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Allocate the color red. */ -red = gdImageColorAllocate(im, 255, 0, 0); -/* Inscribe an ellipse in the image. */ -gdImageArc(im, 50, 25, 98, 48, 0, 360, white); -/* Flood-fill the ellipse. Fill color is red, border color is - white (ellipse). */ -gdImageFillToBorder(im, 50, 50, white, red); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageFill(gdImagePtr im, int x, int y, int color) (FUNCTION) - gdImageFill floods a portion of the image with the specified - color, beginning at the specified point and flooding the - surrounding region of the same color as the starting point. For - a way of flooding a region defined by a specific border color - rather than by its interior color, see gdImageFillToBorder. - - The fill color can be gdTiled, resulting in a tile fill using - another image as the tile. However, the tile image cannot be - transparent. If the image you wish to fill with has a - transparent color index, call gdImageTransparent on the tile - image and set the transparent color index to -1 to turn off its - transparency. - - Note that gdImageFill is recursive. It is not the most naive - implementation possible, and the implementation is expected to - improve, but there will always be degenerate cases in which the - stack can become very deep. This can be a problem in MSDOS and - MS Windows environments. (Of course, in a Unix or NT - environment with a proper stack, this is not a problem at all.) - - -... inside a function ... -gdImagePtr im; -int black; -int white; -int red; -im = gdImageCreate(100, 50); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Allocate the color red. */ -red = gdImageColorAllocate(im, 255, 0, 0); -/* Inscribe an ellipse in the image. */ -gdImageArc(im, 50, 25, 98, 48, 0, 360, white); -/* Flood-fill the ellipse. Fill color is red, and will replace the - black interior of the ellipse. */ -gdImageFill(im, 50, 50, red); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageSetBrush(gdImagePtr im, gdImagePtr brush) (FUNCTION) - A "brush" is an image used to draw wide, shaped strokes in - another image. Just as a paintbrush is not a single point, a - brush image need not be a single pixel. Any gd image can be - used as a brush, and by setting the transparent color index of - the brush image with gdImageColorTransparent, a brush of any - shape can be created. All line-drawing functions, such as - gdImageLine and gdImagePolygon, will use the current brush if - the special "color" gdBrushed or gdStyledBrushed is used when - calling them. - - gdImageSetBrush is used to specify the brush to be used in a - particular image. You can set any image to be the brush. If the - brush image does not have the same color map as the first - image, any colors missing from the first image will be - allocated. If not enough colors can be allocated, the closest - colors already available will be used. This allows arbitrary - GIFs to be used as brush images. It also means, however, that - you should not set a brush unless you will actually use it; if - you set a rapid succession of different brush images, you can - quickly fill your color map, and the results will not be - optimal. - - You need not take any special action when you are finished with - a brush. As for any other image, if you will not be using the - brush image for any further purpose, you should call - gdImageDestroy. You must not use the color gdBrushed if the - current brush has been destroyed; you can of course set a new - brush to replace it. - - -... inside a function ... -gdImagePtr im, brush; -FILE *in; -int black; -im = gdImageCreate(100, 100); -/* Open the brush GIF. For best results, portions of the - brush that should be transparent (ie, not part of the - brush shape) should have the transparent color index. */ -in = fopen("star.gif", "rb"); -brush = gdImageCreateFromGif(in); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -gdImageSetBrush(im, brush); -/* Draw a line from the upper left corner to the lower right corner - using the brush. */ -gdImageLine(im, 0, 0, 99, 99, gdBrushed); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); -/* Destroy the brush image */ -gdImageDestroy(brush); - - void gdImageSetTile(gdImagePtr im, gdImagePtr tile) (FUNCTION) - A "tile" is an image used to fill an area with a repeated - pattern. Any gd image can be used as a tile, and by setting the - transparent color index of the tile image with - gdImageColorTransparent, a tile that allows certain parts of - the underlying area to shine through can be created. All - region-filling functions, such as gdImageFill and - gdImageFilledPolygon, will use the current tile if the special - "color" gdTiled is used when calling them. - - gdImageSetTile is used to specify the tile to be used in a - particular image. You can set any image to be the tile. If the - tile image does not have the same color map as the first image, - any colors missing from the first image will be allocated. If - not enough colors can be allocated, the closest colors already - available will be used. This allows arbitrary GIFs to be used - as tile images. It also means, however, that you should not set - a tile unless you will actually use it; if you set a rapid - succession of different tile images, you can quickly fill your - color map, and the results will not be optimal. - - You need not take any special action when you are finished with - a tile. As for any other image, if you will not be using the - tile image for any further purpose, you should call - gdImageDestroy. You must not use the color gdTiled if the - current tile has been destroyed; you can of course set a new - tile to replace it. - - -... inside a function ... -gdImagePtr im, tile; -FILE *in; -int black; -im = gdImageCreate(100, 100); -/* Open the tile GIF. For best results, portions of the - tile that should be transparent (ie, allowing the - background to shine through) should have the transparent - color index. */ -in = fopen("star.gif", "rb"); -tile = gdImageCreateFromGif(in); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -gdImageSetTile(im, tile); -/* Fill an area using the tile. */ -gdImageFilledRectangle(im, 25, 25, 75, 75, gdTiled); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); -/* Destroy the tile image */ -gdImageDestroy(tile); - - void gdImageSetStyle(gdImagePtr im, int *style, int styleLength) - (FUNCTION) - It is often desirable to draw dashed lines, dotted lines, and - other variations on a broken line. gdImageSetStyle can be used - to set any desired series of colors, including a special color - that leaves the background intact, to be repeated during the - drawing of a line. - - To use gdImageSetStyle, create an array of integers and assign - them the desired series of color values to be repeated. You can - assign the special color value gdTransparent to indicate that - the existing color should be left unchanged for that particular - pixel (allowing a dashed line to be attractively drawn over an - existing image). - - Then, to draw a line using the style, use the normal - gdImageLine function with the special color value gdStyled. - - As of version 1.1.1, the style array is copied when you set the - style, so you need not be concerned with keeping the array - around indefinitely. This should not break existing code that - assumes styles are not copied. - - You can also combine styles and brushes to draw the brush image - at intervals instead of in a continuous stroke. When creating a - style for use with a brush, the style values are interpreted - differently: zero (0) indicates pixels at which the brush - should not be drawn, while one (1) indicates pixels at which - the brush should be drawn. To draw a styled, brushed line, you - must use the special color value gdStyledBrushed. For an - example of this feature in use, see gddemo.c (provided in the - distribution). - - -gdImagePtr im; -int styleDotted[2], styleDashed[6]; -FILE *in; -int black; -int red; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -red = gdImageColorAllocate(im, 255, 0, 0); -/* Set up dotted style. Leave every other pixel alone. */ -styleDotted[0] = red; -styleDotted[1] = gdTransparent; -/* Set up dashed style. Three on, three off. */ -styleDashed[0] = red; -styleDashed[1] = red; -styleDashed[2] = red; -styleDashed[3] = gdTransparent; -styleDashed[4] = gdTransparent; -styleDashed[5] = gdTransparent; -/* Set dotted style. Note that we have to specify how many pixels are - in the style! */ -gdImageSetStyle(im, styleDotted, 2); -/* Draw a line from the upper left corner to the lower right corner. */ -gdImageLine(im, 0, 0, 99, 99, gdStyled); -/* Now the dashed line. */ -gdImageSetStyle(im, styleDashed, 6); -gdImageLine(im, 0, 99, 0, 99, gdStyled); - -/* ... Do something with the image, such as saving it to a file ... */ - -/* Destroy it */ -gdImageDestroy(im); - - Query Functions - - int gdImageBlue(gdImagePtr im, int color) (MACRO) - gdImageBlue is a macro which returns the blue component - of the specified color index. Use this macro rather than - accessing the structure members directly. - - int gdImageGetPixel(gdImagePtr im, int x, int y) (FUNCTION) - gdImageGetPixel() retrieves the color index of a - particular pixel. Always use this function to query - pixels; do not access the pixels of the gdImage structure - directly. - - -... inside a function ... -FILE *in; -gdImagePtr im; -int c; -in = fopen("mygif.gif", "rb"); -im = gdImageCreateFromGif(in); -fclose(in); -c = gdImageGetPixel(im, gdImageSX(im) / 2, gdImageSY(im) / 2); -printf("The value of the center pixel is %d; RGB values are %d,%d,%d\n", - c, im->red[c], im->green[c], im->blue[c]); -gdImageDestroy(im); - - int gdImageBoundsSafe(gdImagePtr im, int x, int y) (FUNCTION) - gdImageBoundsSafe returns true (1) if the specified point - is within the bounds of the image, false (0) if not. This - function is intended primarily for use by those who wish - to add functions to gd. All of the gd drawing functions - already clip safely to the edges of the image. - - -... inside a function ... -gdImagePtr im; -int black; -int white; -im = gdImageCreate(100, 100); -if (gdImageBoundsSafe(im, 50, 50)) { - printf("50, 50 is within the image bounds\n"); -} else { - printf("50, 50 is outside the image bounds\n"); -} -gdImageDestroy(im); - - int gdImageGreen(gdImagePtr im, int color) (MACRO) - gdImageGreen is a macro which returns the green component - of the specified color index. Use this macro rather than - accessing the structure members directly. - - int gdImageRed(gdImagePtr im, int color) (MACRO) - gdImageRed is a macro which returns the red component of - the specified color index. Use this macro rather than - accessing the structure members directly. - - int gdImageSX(gdImagePtr im) (MACRO) - gdImageSX is a macro which returns the width of the image - in pixels. Use this macro rather than accessing the - structure members directly. - - int gdImageSY(gdImagePtr im) (MACRO) - gdImageSY is a macro which returns the height of the - image in pixels. Use this macro rather than accessing the - structure members directly. - - Fonts and text-handling functions - - void gdImageChar(gdImagePtr im, gdFontPtr font, int x, int y, int - c, int color) (FUNCTION) - gdImageChar is used to draw single characters on the - image. (To draw multiple characters, use gdImageString or - gdImageString16.) The second argument is a pointer to a - font definition structure; five fonts are provided with - gd, gdFontTiny, gdFontSmall, gdFontMediumBold, - gdFontLarge, and gdFontGiant. You must include the files - "gdfontt.h", "gdfonts.h", "gdfontmb.h", "gdfontl.h" and - "gdfontg.h" respectively and (if you are not using a - library-based approach) link with the corresponding .c - files to use the provided fonts. The character specified - by the fifth argument is drawn from left to right in the - specified color. (See gdImageCharUp for a way of drawing - vertical text.) Pixels not set by a particular character - retain their previous color. - - -#include "gd.h" -#include "gdfontl.h" -... inside a function ... -gdImagePtr im; -int black; -int white; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Draw a character. */ -gdImageChar(im, gdFontLarge, 0, 0, 'Q', white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageCharUp(gdImagePtr im, gdFontPtr font, int x, int y, - int c, int color) (FUNCTION) - gdImageCharUp is used to draw single characters on the - image, rotated 90 degrees. (To draw multiple characters, - use gdImageStringUp or gdImageStringUp16.) The second - argument is a pointer to a font definition structure; - five fonts are provided with gd, gdFontTiny, gdFontSmall, - gdFontMediumBold, gdFontLarge, and gdFontGiant. You must - include the files "gdfontt.h", "gdfonts.h", "gdfontmb.h", - "gdfontl.h" and "gdfontg.h" respectively and (if you are - not using a library-based approach) link with the - corresponding .c files to use the provided fonts. The - character specified by the fifth argument is drawn from - bottom to top, rotated at a 90-degree angle, in the - specified color. (See gdImageChar for a way of drawing - horizontal text.) Pixels not set by a particular - character retain their previous color. - - -#include "gd.h" -#include "gdfontl.h" -... inside a function ... -gdImagePtr im; -int black; -int white; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Draw a character upwards so it rests against the top of the image. */ -gdImageCharUp(im, gdFontLarge, - 0, gdFontLarge->h, 'Q', white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageString(gdImagePtr im, gdFontPtr font, int x, int y, - unsigned char *s, int color) (FUNCTION) - gdImageString is used to draw multiple characters on the - image. (To draw single characters, use gdImageChar.) The - second argument is a pointer to a font definition - structure; five fonts are provided with gd, gdFontTiny, - gdFontSmall, gdFontMediumBold, gdFontLarge, and - gdFontGiant. You must include the files "gdfontt.h", - "gdfonts.h", "gdfontmb.h", "gdfontl.h" and "gdfontg.h" - respectively and (if you are not using a library-based - approach) link with the corresponding .c files to use the - provided fonts. The null-terminated C string specified by - the fifth argument is drawn from left to right in the - specified color. (See gdImageStringUp for a way of - drawing vertical text.) Pixels not set by a particular - character retain their previous color. - - -#include "gd.h" -#include "gdfontl.h" -#include -... inside a function ... -gdImagePtr im; -int black; -int white; -/* String to draw. */ -char *s = "Hello."; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Draw a centered string. */ -gdImageString(im, gdFontLarge, - im->w / 2 - (strlen(s) * gdFontLarge->w / 2), - im->h / 2 - gdFontLarge->h / 2, - s, white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageString16(gdImagePtr im, gdFontPtr font, int x, int y, - unsigned short *s, int color) (FUNCTION) - gdImageString is used to draw multiple 16-bit characters - on the image. (To draw single characters, use - gdImageChar.) The second argument is a pointer to a font - definition structure; five fonts are provided with gd, - gdFontTiny, gdFontSmall, gdFontMediumBold, gdFontLarge, - and gdFontGiant. You must include the files "gdfontt.h", - "gdfonts.h", "gdfontmb.h", "gdfontl.h" and "gdfontg.h" - respectively and (if you are not using a library-based - approach) link with the corresponding .c files to use the - provided fonts. The null-terminated string of characters - represented as 16-bit unsigned short integers specified - by the fifth argument is drawn from left to right in the - specified color. (See gdImageStringUp16 for a way of - drawing vertical text.) Pixels not set by a particular - character retain their previous color. - - This function was added in gd1.3 to provide a means of - rendering fonts with more than 256 characters for those - who have them. A more frequently used routine is - gdImageString. - - void gdImageStringUp(gdImagePtr im, gdFontPtr font, int x, int y, - unsigned char *s, int color) (FUNCTION) - gdImageStringUp is used to draw multiple characters on - the image, rotated 90 degrees. (To draw single - characters, use gdImageCharUp.) The second argument is a - pointer to a font definition structure; five fonts are - provided with gd, gdFontTiny, gdFontSmall, - gdFontMediumBold, gdFontLarge, and gdFontGiant. You must - include the files "gdfontt.h", "gdfonts.h", "gdfontmb.h", - "gdfontl.h" and "gdfontg.h" respectively and (if you are - not using a library-based approach) link with the - corresponding .c files to use the provided fonts.The - null-terminated C string specified by the fifth argument - is drawn from bottom to top (rotated 90 degrees) in the - specified color. (See gdImageString for a way of drawing - horizontal text.) Pixels not set by a particular - character retain their previous color. - - -#include "gd.h" -#include "gdfontl.h" -#include -... inside a function ... -gdImagePtr im; -int black; -int white; -/* String to draw. */ -char *s = "Hello."; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color white (red, green and blue all maximum). */ -white = gdImageColorAllocate(im, 255, 255, 255); -/* Draw a centered string going upwards. Axes are reversed, - and Y axis is decreasing as the string is drawn. */ -gdImageStringUp(im, gdFontLarge, - im->w / 2 - gdFontLarge->h / 2, - im->h / 2 + (strlen(s) * gdFontLarge->w / 2), - s, white); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageStringUp16(gdImagePtr im, gdFontPtr font, int x, int - y, unsigned short *s, int color) (FUNCTION) - gdImageString is used to draw multiple 16-bit characters - vertically on the image. (To draw single characters, use - gdImageChar.) The second argument is a pointer to a font - definition structure; five fonts are provided with gd, - gdFontTiny, gdFontSmall, gdFontMediumBold, gdFontLarge, - and gdFontGiant. You must include the files "gdfontt.h", - "gdfonts.h", "gdfontmb.h", "gdfontl.h" and "gdfontg.h" - respectively and (if you are not using a library-based - approach) link with the corresponding .c files to use the - provided fonts. The null-terminated string of characters - represented as 16-bit unsigned short integers specified - by the fifth argument is drawn from bottom to top in the - specified color. (See gdImageStringUp16 for a way of - drawing horizontal text.) Pixels not set by a particular - character retain their previous color. - - This function was added in gd1.3 to provide a means of - rendering fonts with more than 256 characters for those - who have them. A more frequently used routine is - gdImageStringUp. - - Color-handling functions - - int gdImageColorAllocate(gdImagePtr im, int r, int g, int b) - (FUNCTION) - gdImageColorAllocate finds the first available color - index in the image specified, sets its RGB values to - those requested (255 is the maximum for each), and - returns the index of the new color table entry. When - creating a new image, the first time you invoke this - function, you are setting the background color for that - image. - - In the event that all gdMaxColors colors (256) have - already been allocated, gdImageColorAllocate will return - -1 to indicate failure. (This is not uncommon when - working with existing GIF files that already use 256 - colors.) Note that gdImageColorAllocate does not check - for existing colors that match your request; see - gdImageColorExact and gdImageColorClosest for ways to - locate existing colors that approximate the color desired - in situations where a new color is not available. - - -... inside a function ... -gdImagePtr im; -int black; -int red; -im = gdImageCreate(100, 100); -/* Background color (first allocated) */ -black = gdImageColorAllocate(im, 0, 0, 0); -/* Allocate the color red. */ -red = gdImageColorAllocate(im, 255, 0, 0); -/* Draw a dashed line from the upper left corner to the lower right corner. */ -gdImageDashedLine(im, 0, 0, 99, 99, red); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - int gdImageColorClosest(gdImagePtr im, int r, int g, int b) - (FUNCTION) - gdImageColorClosest searches the colors which have been - defined thus far in the image specified and returns the - index of the color with RGB values closest to those of - the request. (Closeness is determined by Euclidian - distance, which is used to determine the distance in - three-dimensional color space between colors.) - - If no colors have yet been allocated in the image, - gdImageColorClosest returns -1. - - This function is most useful as a backup method for - choosing a drawing color when an image already contains - gdMaxColors (256) colors and no more can be allocated. - (This is not uncommon when working with existing GIF - files that already use many colors.) See - gdImageColorExact for a method of locating exact matches - only. - - -... inside a function ... -gdImagePtr im; -FILE *in; -int red; -/* Let's suppose that photo.gif is a scanned photograph with - many colors. */ -in = fopen("photo.gif", "rb"); -im = gdImageCreateFromGif(in); -fclose(in); -/* Try to allocate red directly */ -red = gdImageColorAllocate(im, 255, 0, 0); -/* If we fail to allocate red... */ -if (red == (-1)) { - /* Find the closest color instead. */ - red = gdImageColorClosest(im, 255, 0, 0); -} -/* Draw a dashed line from the upper left corner to the lower right corner */ -gdImageDashedLine(im, 0, 0, 99, 99, red); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - int gdImageColorExact(gdImagePtr im, int r, int g, int b) - (FUNCTION) - gdImageColorExact searches the colors which have been - defined thus far in the image specified and returns the - index of the first color with RGB values which exactly - match those of the request. If no allocated color matches - the request precisely, gdImageColorExact returns -1. See - gdImageColorClosest for a way to find the color closest - to the color requested. - - -... inside a function ... -gdImagePtr im; -int red; -in = fopen("photo.gif", "rb"); -im = gdImageCreateFromGif(in); -fclose(in); -/* The image may already contain red; if it does, we'll save a slot - in the color table by using that color. */ -/* Try to allocate red directly */ -red = gdImageColorExact(im, 255, 0, 0); -/* If red isn't already present... */ -if (red == (-1)) { - /* Second best: try to allocate it directly. */ - red = gdImageColorAllocate(im, 255, 0, 0); - /* Out of colors, so find the closest color instead. */ - red = gdImageColorClosest(im, 255, 0, 0); -} -/* Draw a dashed line from the upper left corner to the lower right corner */ -gdImageDashedLine(im, 0, 0, 99, 99, red); -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - int gdImageColorsTotal(gdImagePtr im) (MACRO) - gdImageColorsTotal is a macro which returns the number of - colors currently allocated in the image. Use this macro - to obtain this information; do not access the structure - directly. - - int gdImageColorRed(gdImagePtr im, int c) (MACRO) - gdImageColorRed is a macro which returns the red portion - of the specified color in the image. Use this macro to - obtain this information; do not access the structure - directly. - - int gdImageColorGreen(gdImagePtr im, int c) (MACRO) - gdImageColorGreen is a macro which returns the green - portion of the specified color in the image. Use this - macro to obtain this information; do not access the - structure directly. - - int gdImageColorBlue(gdImagePtr im, int c) (MACRO) - gdImageColorBlue is a macro which returns the green - portion of the specified color in the image. Use this - macro to obtain this information; do not access the - structure directly. - - int gdImageGetInterlaced(gdImagePtr im) (MACRO) - gdImageGetInterlaced is a macro which returns true (1) if - the image is interlaced, false (0) if not. Use this macro - to obtain this information; do not access the structure - directly. See gdImageInterlace for a means of interlacing - images. - - int gdImageGetTransparent(gdImagePtr im) (MACRO) - gdImageGetTransparent is a macro which returns the - current transparent color index in the image. If there is - no transparent color, gdImageGetTransparent returns -1. - Use this macro to obtain this information; do not access - the structure directly. - - void gdImageColorDeallocate(gdImagePtr im, int color) (FUNCTION) - gdImageColorDeallocate marks the specified color as being - available for reuse. It does not attempt to determine - whether the color index is still in use in the image. - After a call to this function, the next call to - gdImageColorAllocate for the same image will set new RGB - values for that color index, changing the color of any - pixels which have that index as a result. If multiple - calls to gdImageColorDeallocate are made consecutively, - the lowest-numbered index among them will be reused by - the next gdImageColorAllocate call. - - -... inside a function ... -gdImagePtr im; -int red, blue; -in = fopen("photo.gif", "rb"); -im = gdImageCreateFromGif(in); -fclose(in); -/* Look for red in the color table. */ -red = gdImageColorExact(im, 255, 0, 0); -/* If red is present... */ -if (red != (-1)) { - /* Deallocate it. */ - gdImageColorDeallocate(im, red); - /* Allocate blue, reusing slot in table. - Existing red pixels will change color. */ - blue = gdImageColorAllocate(im, 0, 0, 255); -} -/* ... Do something with the image, such as saving it to a file... */ -/* Destroy it */ -gdImageDestroy(im); - - void gdImageColorTransparent(gdImagePtr im, int color) (FUNCTION) - - gdImageColorTransparent sets the transparent color index - for the specified image to the specified index. To - indicate that there should be no transparent color, - invoke gdImageColorTransparent with a color index of -1. - - The color index used should be an index allocated by - gdImageColorAllocate, whether explicitly invoked by your - code or implicitly invoked by loading an image. In order - to ensure that your image has a reasonable appearance - when viewed by users who do not have transparent - background capabilities, be sure to give reasonable RGB - values to the color you allocate for use as a transparent - color, even though it will be transparent on systems that - support transparency. - - -... inside a function ... -gdImagePtr im; -int black; -FILE *in, *out; -in = fopen("photo.gif", "rb"); -im = gdImageCreateFromGif(in); -fclose(in); -/* Look for black in the color table and make it transparent. */ -black = gdImageColorExact(im, 0, 0, 0); -/* If black is present... */ -if (black != (-1)) { - /* Make it transparent */ - gdImageColorTransparent(im, black); -} -/* Save the newly-transparent image back to the file */ -out = fopen("photo.gif", "wb"); -gdImageGif(im, out); -fclose(out); -/* Destroy it */ -gdImageDestroy(im); - - Copying and resizing functions - - void gdImageCopy(gdImagePtr dst, gdImagePtr src, int dstX, int - dstY, int srcX, int srcY, int w, int h) (FUNCTION) - gdImageCopy is used to copy a rectangular portion of one - image to another image. (For a way of stretching or - shrinking the image in the process, see - gdImageCopyResized.) - - The dst argument is the destination image to which the - region will be copied. The src argument is the source - image from which the region is copied. The dstX and dstY - arguments specify the point in the destination image to - which the region will be copied. The srcX and srcY - arguments specify the upper left corner of the region in - the source image. The w and h arguments specify the width - and height of the region. - - When you copy a region from one location in an image to - another location in the same image, gdImageCopy will - perform as expected unless the regions overlap, in which - case the result is unpredictable. - - Important note on copying between images: since different - images do not necessarily have the same color tables, - pixels are not simply set to the same color index values - to copy them. gdImageCopy will attempt to find an - identical RGB value in the destination image for each - pixel in the copied portion of the source image by - invoking gdImageColorExact. If such a value is not found, - gdImageCopy will attempt to allocate colors as needed - using gdImageColorAllocate. If both of these methods - fail, gdImageCopy will invoke gdImageColorClosest to find - the color in the destination image which most closely - approximates the color of the pixel being copied. - - -... Inside a function ... -gdImagePtr im_in; -gdImagePtr im_out; -int x, y; -FILE *in; -FILE *out; -/* Load a small gif to tile the larger one with */ -in = fopen("small.gif", "rb"); -im_in = gdImageCreateFromGif(in); -fclose(in); -/* Make the output image four times as large on both axes */ -im_out = gdImageCreate(im_in->sx * 4, im_in->sy * 4); -/* Now tile the larger image using the smaller one */ -for (y = 0; (y < 4); y++) { - for (x = 0; (x < 4); x++) { - gdImageCopy(im_out, im_in, - x * im_in->sx, y * im_in->sy, - 0, 0, - im_in->sx, im_in->sy); - } -} -out = fopen("tiled.gif", "wb"); -gdImageGif(im_out, out); -fclose(out); -gdImageDestroy(im_in); -gdImageDestroy(im_out); - - void gdImageCopyResized(gdImagePtr dst, gdImagePtr src, int dstX, - int dstY, int srcX, int srcY, int destW, int destH, int - srcW, int srcH) (FUNCTION) - gdImageCopyResized is used to copy a rectangular portion - of one image to another image. The X and Y dimensions of - the original region and the destination region can vary, - resulting in stretching or shrinking of the region as - appropriate. (For a simpler version of this function - which does not deal with resizing, see gdImageCopy.) - - The dst argument is the destination image to which the - region will be copied. The src argument is the source - image from which the region is copied. The dstX and dstY - arguments specify the point in the destination image to - which the region will be copied. The srcX and srcY - arguments specify the upper left corner of the region in - the source image. The dstW and dstH arguments specify the - width and height of the destination region. The srcW and - srcH arguments specify the width and height of the source - region and can differ from the destination size, allowing - a region to be scaled during the copying process. - - When you copy a region from one location in an image to - another location in the same image, gdImageCopy will - perform as expected unless the regions overlap, in which - case the result is unpredictable. If this presents a - problem, create a scratch image in which to keep - intermediate results. - - Important note on copying between images: since images do - not necessarily have the same color tables, pixels are - not simply set to the same color index values to copy - them. gdImageCopy will attempt to find an identical RGB - value in the destination image for each pixel in the - copied portion of the source image by invoking - gdImageColorExact. If such a value is not found, - gdImageCopy will attempt to allocate colors as needed - using gdImageColorAllocate. If both of these methods - fail, gdImageCopy will invoke gdImageColorClosest to find - the color in the destination image which most closely - approximates the color of the pixel being copied. - - -... Inside a function ... -gdImagePtr im_in; -gdImagePtr im_out; -int x, y; -FILE *in; -FILE *out; -/* Load a small gif to expand in the larger one */ -in = fopen("small.gif", "rb"); -im_in = gdImageCreateFromGif(in); -fclose(in); -/* Make the output image four times as large on both axes */ -im_out = gdImageCreate(im_in->sx * 4, im_in->sy * 4); -/* Now copy the smaller image, but four times larger */ -gdImageCopyResized(im_out, im_in, 0, 0, 0, 0, - im_out->sx, im_out->sy, - im_in->sx, im_in->sy); -out = fopen("large.gif", "wb"); -gdImageGif(im_out, out); -fclose(out); -gdImageDestroy(im_in); -gdImageDestroy(im_out); - - Miscellaneous Functions - - gdImageInterlace(gdImagePtr im, int interlace) (FUNCTION) - gdImageInterlace is used to determine whether an - image should be stored in a linear fashion, in - which lines will appear on the display from first - to last, or in an interlaced fashion, in which the - image will "fade in" over several passes. By - default, images are not interlaced. - - A nonzero value for the interlace argument turns on - interlace; a zero value turns it off. Note that - interlace has no effect on other functions, and has - no meaning unless you save the image in GIF format; - the gd and xbm formats do not support interlace. - - When a GIF is loaded with gdImageCreateFromGif , - interlace will be set according to the setting in - the GIF file. - - Note that many GIF viewers and web browsers do not - support interlace. However, the interlaced GIF - should still display; it will simply appear all at - once, just as other images do. - - -gdImagePtr im; -FILE *out; -/* ... Create or load the image... */ - -/* Now turn on interlace */ -gdImageInterlace(im, 1); -/* And open an output file */ -out = fopen("test.gif", "wb"); -/* And save the image */ -gdImageGif(im, out); -fclose(out); -gdImageDestroy(im); - - Constants - - gdBrushed (CONSTANT) - Used in place of a color when invoking a - line-drawing function such as gdImageLine or - gdImageRectangle. When gdBrushed is used as the - color, the brush image set with gdImageSetBrush is - drawn in place of each pixel of the line (the brush - is usually larger than one pixel, creating the - effect of a wide paintbrush). See also - gdStyledBrushed for a way to draw broken lines with - a series of distinct copies of an image. - - gdMaxColors(CONSTANT) - The constant 256. This is the maximum number of - colors in a GIF file according to the GIF standard, - and is also the maximum number of colors in a gd - image. - - gdStyled (CONSTANT) - Used in place of a color when invoking a - line-drawing function such as gdImageLine or - gdImageRectangle. When gdStyled is used as the - color, the colors of the pixels are drawn - successively from the style that has been set with - gdImageSetStyle. If the color of a pixel is equal - to gdTransparent, that pixel is not altered. (This - mechanism is completely unrelated to the - "transparent color" of the image itself; see - gdImageColorTransparent gdImageColorTransparent for - that mechanism.) See also gdStyledBrushed. - - gdStyledBrushed (CONSTANT) - Used in place of a color when invoking a - line-drawing function such as gdImageLine or - gdImageRectangle. When gdStyledBrushed is used as - the color, the brush image set with gdImageSetBrush - is drawn at each pixel of the line, providing that - the style set with gdImageSetStyle contains a - nonzero value (OR gdTransparent, which does not - equal zero but is supported for consistency) for - the current pixel. (Pixels are drawn successively - from the style as the line is drawn, returning to - the beginning when the available pixels in the - style are exhausted.) Note that this differs from - the behavior of gdStyled, in which the values in - the style are used as actual pixel colors, except - for gdTransparent. - - gdDashSize (CONSTANT) - The length of a dash in a dashed line. Defined to - be 4 for backwards compatibility with programs that - use gdImageDashedLine. New programs should use - gdImageSetStyle and call the standard gdImageLine - function with the special "color" gdStyled or - gdStyledBrushed. - - gdTiled (CONSTANT) - Used in place of a normal color in - gdImageFilledRectangle, gdImageFilledPolygon, - gdImageFill, and gdImageFillToBorder. gdTiled - selects a pixel from the tile image set with - gdImageSetTile in such a way as to ensure that the - filled area will be tiled with copies of the tile - image. See the discussions of gdImageFill and - gdImageFillToBorder for special restrictions - regarding those functions. - - gdTransparent (CONSTANT) - Used in place of a normal color in a style to be - set with gdImageSetStyle. gdTransparent is not the - transparent color index of the image; for that - functionality please see gdImageColorTransparent. - - About the additional .gd image file format - - In addition to reading and writing the GIF format - and reading the X Bitmap format, gd has the - capability to read and write its own ".gd" format. - This format is not intended for general purpose use - and should never be used to distribute images. It - is not a compressed format. Its purpose is solely - to allow very fast loading of images your program - needs often in order to build other images for - output. If you are experiencing performance - problems when loading large, fixed GIF images your - program needs to produce its output images, you may - wish to examine the functions gdImageCreateFromGd - and gdImageGd, which read and write .gd format - images. - - The program "giftogd.c" is provided as a simple way - of converting .gif files to .gd format. I emphasize - again that you will not need to use this format - unless you have a need for high-speed loading of a - few frequently-used images in your program. - - Please tell us you're using gd! - - When you contact us and let us know you are using - gd, you help us justify the time spent in - maintaining and improving it. So please let us - know. If the results are publicly visible on the - web, a URL is a wonderful thing to receive, but if - it's not a publicly visible project, a simple note - is just as welcome. - - If you have problems - - If you have any difficulties with gd, feel free to - contact the author, Thomas Boutell. Be sure to read - this manual carefully first. - - Alphabetical quick index - - gdBrushed | gdDashSize | gdFont | gdFontPtr | - gdImage | gdImageArc | gdImageBlue | - gdImageBoundsSafe | gdImageChar | gdImageCharUp | - gdImageColorAllocate | gdImageColorClosest | - gdImageColorDeallocate | gdImageColorExact | - gdImageColorTransparent | gdImageCopy | - gdImageCopyResized | gdImageCreate | - gdImageCreateFromGd | gdImageCreateFromGif | - gdImageCreateFromXbm | gdImageDashedLine | - gdImageDestroy | gdImageFill | gdImageFillToBorder - | gdImageFilledRectangle | gdImageGd | - gdImageGetInterlaced | gdImageGetPixel | - gdImageGetTransparent | gdImageGif | gdImageGreen | - gdImageInterlace | gdImageLine | - gdImageFilledPolygon | gdImagePolygon | gdImagePtr - | gdImageRectangle | gdImageRed | gdImageSetBrush | - gdImageSetPixel | gdImageSetStyle | gdImageSetTile - | gdImageString | gdImageString16 | gdImageStringUp - | gdImageStringUp16 | gdMaxColors | gdPoint | - gdStyled | gdStyledBrushed | gdTiled | - gdTransparent - - Boutell.Com, Inc. diff --git a/libraries/gd1.3/webgif.c b/libraries/gd1.3/webgif.c deleted file mode 100644 index c8ffe42..0000000 --- a/libraries/gd1.3/webgif.c +++ /dev/null @@ -1,191 +0,0 @@ -/* Bring in the gd library functions */ -#include "gd.h" - -/* Bring in standard I/O and string manipulation functions */ -#include -#include - -int main(int argc, char **argv) -{ - FILE *in; - FILE *out; - char outFn[20]; - int useStdinStdout=0; - - /* Declare our image pointer */ - gdImagePtr im = 0; - int i; - /* We'll clear 'no' once we know the user has made a - reasonable request. */ - int no = 1; - /* We'll set 'write' once we know the user's request - requires that the image be written back to disk. */ - int write = 0; - /* C programs always get at least one argument; we want at - least one more (the image), more in practice. */ - if (argc < 2 || !strcmp(argv[1], "--help")) { - no = 1; - goto usage; - } - - /* The last argument should be the image. Open the file. */ - if (strcmp("-", argv[argc-1])==0) { /* - is synonymous with STDIN */ - useStdinStdout = 1; - in = stdin; - } else { - in = fopen(argv[argc-1], "rb"); - } - if (!in) { - fprintf(stderr, - "Error: can't open file %s.\n", argv[argc-1]); - exit(1); - } - /* Now load the image. */ - im = gdImageCreateFromGif(in); - fclose(in); - /* If the load failed, it must not be a GIF file. */ - if (!im) { - fprintf(stderr, - "Error: %s is not a valid gif file.\n", argv[argc-1]); - exit(1); - } - /* Consider each argument in turn. */ - for (i=1; (i < (argc-1)); i++) { - /* -i turns on and off interlacing. */ - if (!strcmp(argv[i], "--help")) { - /* Every program should use this for help! :) */ - no = 1; - goto usage; - } else if (!strcmp(argv[i], "-i")) { - if (i == (argc-2)) { - fprintf(stderr, - "Error: -i specified without y or n.\n"); - no = 1; - goto usage; - } - if (!strcmp(argv[i+1], "y")) { - /* Set interlace. */ - gdImageInterlace(im, 1); - } else if (!strcmp(argv[i+1], "n")) { - /* Clear interlace. */ - gdImageInterlace(im, 0); - } else { - fprintf(stderr, - "Error: -i specified without y or n.\n"); - no = 1; - goto usage; - } - i++; - no = 0; - write = 1; - } else if (!strcmp(argv[i], "-t")) { - /* Set transparent index (or none). */ - int index; - if (i == (argc-2)) { - fprintf(stderr, - "Error: -t specified without a color table index.\n"); - no = 1; - goto usage; - } - if (!strcmp(argv[i+1], "none")) { - /* -1 means not transparent. */ - gdImageColorTransparent(im, -1); - } else { - /* OK, get an integer and set the index. */ - index = atoi(argv[i+1]); - gdImageColorTransparent(im, index); - } - i++; - write = 1; - no = 0; - } else if (!strcmp(argv[i], "-l")) { - /* List the colors in the color table. */ - int j; - /* Tabs used below. */ - printf("Index Red Green Blue\n"); - for (j=0; (j < gdImageColorsTotal(im)); j++) { - /* Use access macros to learn colors. */ - printf("%d %d %d %d\n", - j, - gdImageRed(im, j), - gdImageGreen(im, j), - gdImageBlue(im, j)); - } - no = 0; - } else if (!strcmp(argv[i], "-d")) { - /* Output dimensions, etc. */ - int t; - printf("Width: %d Height: %d Colors: %d\n", - gdImageSX(im), gdImageSY(im), - gdImageColorsTotal(im)); - t = gdImageGetTransparent(im); - if (t != (-1)) { - printf("Transparent index: %d\n", t); - } else { - /* -1 means the image is not transparent. */ - printf("Transparent index: none\n"); - } - if (gdImageGetInterlaced(im)) { - printf("Interlaced: yes\n"); - } else { - printf("Interlaced: no\n"); - } - no = 0; - } else { - fprintf(stderr, "Unknown argument: %s\n", argv[i]); - break; - } - } -usage: - if (no) { - /* If the command failed, output an explanation. */ - fprintf(stderr, -"Usage: webgif [-i y|n ] [-l] [-t index|off ] [-d] gifname.gif\n" - -" -i [y|n] Turns on/off interlace\n" -" -l Prints the table of color indexes\n" -" -t [index] Set the transparent color to the specified index (0-255 or none)\n" -" -d Reports the dimensions and other characteristics of the image.\n" -"\n" -"If you specify '-' as the input file, stdin/stdout will be used input/output.\n" -); - } - if (write) { - if (useStdinStdout) { - out = stdout; - } else { - /* Open a temporary file. */ - - /* "temp.tmp" is not good temporary filename. */ - sprintf(outFn, "webgif.tmp%d", getpid()); - out = fopen(outFn, "wb"); - - if (!out) { - fprintf(stderr, - "Unable to write to %s -- exiting\n", outFn); - exit(1); - } - } - - /* Write the new gif. */ - gdImageGif(im, out); - - if (!useStdinStdout) { - fclose(out); - /* Erase the old gif. */ - unlink(argv[argc-1]); - /* Rename the new to the old. */ - if (rename(outFn, argv[argc-1])!=0) { - perror("rename"); - exit(1); - } - } - } - /* Delete the image from memory. */ - if (im) { - gdImageDestroy(im); - } - /* All's well that ends well. */ - return 0; -} - diff --git a/libraries/libpng-1.0.9/ANNOUNCE b/libraries/libpng-1.0.9/ANNOUNCE deleted file mode 100644 index 486b9c6..0000000 --- a/libraries/libpng-1.0.9/ANNOUNCE +++ /dev/null @@ -1,60 +0,0 @@ - -Libpng 1.0.9 - January 31, 2001 - -This is a public release of libpng, intended for use in production codes. - -Changes since the last public release (1.0.8): - - Fixed typo in scripts/makefile.hpux - Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser) - Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser) - Changed "cdrom.com" in documentation to "libpng.org" - Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg). - Changed type of "params" from voidp to png_voidp in png_read|write_png(). - Added MNG_EXTENSIONS_SUPPORTED macro and support for some proposed MNG - features, for testing purposes. - Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h. - Revised the 3 instances of WRITEFILE in pngtest.c. - Updated png.rc in dll/msvc project - Revised makefile.dec to define and use LIBPATH and INCPATH - Increased size of global png_libpng_ver[] array from 12 to 18 chars. - Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const. - Removed duplicate png_crc_finish() from png_handle_bKGD() function. - Added a warning when application calls png_read_update_info() multiple times. - Revised makefile.cygwin - Fixed bugs in iCCP support in pngrutil.c and pngwutil.c. - Replaced png_set_empty_plte_permitted() with png_permit_mng_features(). - Relocated "msvc" and "wince" project subdirectories into "projects" - subdirectory and added projects/borland project subdirectory. - Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate. - Add error message in png_set_compression_buffer_size() when malloc fails. - Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project. - Removed the png_flush() in pngwrite.c that crashes some applications - that don't set png_output_flush_fn. - Added makefile.macosx and makefile.aix to scripts directory. - Change png_chunk_warning to png_warning in png_check_keyword(). - Increased the first part of msg buffer from 16 to 18 in png_chunk_error(). - Added support for filter method 64 (for PNG datastreams embedded in MNG) - Revised png_set_filter() to accept filter method 64 when appropriate. - Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to - help prevent applications from using MNG features in PNG datastreams. - Revised libpng.3/libpng.txt. Changed "filter type" to "filter method". - Fixed error handling of unknown compression type in png_decompress_chunk(). - In pngconf.h, define __cdecl when _MSC_VER is defined. - Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places. - Revised memory management in png_set_hIST and png_handle_hIST in a backward - compatible manner. PLTE and tRNS were revised similarly. - Revised the iCCP chunk reader to ignore trailing garbage. - Moved pngasmrd.h into pngconf.h. - Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop. - Added png_set_invalid to wince and msvc project module definition files. - Fixed bug with progressive reading of narrow interlaced images in pngpread.c - Do not typedef png_FILE_io in pngconf.h when PNG_NO_STDIO is defined. - Updated makefile.sgi to make shared library. - Added check of cygwin's ALL_STATIC in pngconf.h - Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos. - -Send comments/corrections/commendations to -png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu - -Glenn R-P diff --git a/libraries/libpng-1.0.9/CHANGES b/libraries/libpng-1.0.9/CHANGES deleted file mode 100644 index 0f00b54..0000000 --- a/libraries/libpng-1.0.9/CHANGES +++ /dev/null @@ -1,900 +0,0 @@ -CHANGES - changes for libpng - -version 0.2 - added reader into png.h - fixed small problems in stub file -version 0.3 - added pull reader - split up pngwrite.c to several files - added pnglib.txt - added example.c - cleaned up writer, adding a few new tranformations - fixed some bugs in writer - interfaced with zlib 0.5 - added K&R support - added check for 64 KB blocks for 16 bit machines -version 0.4 - cleaned up code and commented code - simplified time handling into png_time - created png_color_16 and png_color_8 to handle color needs - cleaned up color type defines - fixed various bugs - made various names more consistant - interfaced with zlib 0.71 - cleaned up zTXt reader and writer (using zlib's Reset functions) - split transformations into pngrtran.c and pngwtran.c -version 0.5 - interfaced with zlib 0.8 - fixed many reading and writing bugs - saved using 3 spaces instead of tabs -version 0.6 - added png_large_malloc() and png_large_free() - added png_size_t - cleaned up some compiler warnings - added png_start_read_image() -version 0.7 - cleaned up lots of bugs - finished dithering and other stuff - added test program - changed name from pnglib to libpng -version 0.71 [June, 1995] - changed pngtest.png for zlib 0.93 - fixed error in libpng.txt and example.c -version 0.8 - cleaned up some bugs - added png_set_filler() - split up pngstub.c into pngmem.c, pngio.c, and pngerror.c - added #define's to remove unwanted code - moved png_info_init() to png.c - added old_size into png_realloc() - added functions to manually set filtering and compression info - changed compression parameters based on image type - optimized filter selection code - added version info - changed external functions passing floats to doubles (k&r problems?) - put all the configurable stuff in pngconf.h - enabled png_set_shift to work with paletted images on read - added png_read_update_info() - updates info structure with - transformations -version 0.81 [August, 1995] - incorporated Tim Wegner's medium model code (thanks, Tim) -version 0.82 [September, 1995] - [unspecified changes] -version 0.85 [December, 1995] - added more medium model code (almost everything's a far) - added i/o, error, and memory callback functions - fixed some bugs (16 bit, 4 bit interlaced, etc.) - added first run progressive reader (barely tested) -version 0.86 [January, 1996] - fixed bugs - improved documentation -version 0.87 [January, 1996] - fixed medium model bugs - fixed other bugs introduced in 0.85 and 0.86 - added some minor documentation -version 0.88 [January, 1996] - fixed progressive bugs - replaced tabs with spaces - cleaned up documentation - added callbacks for read/write and warning/error functions -version 0.89 [July, 1996] - added new initialization API to make libpng work better with shared libs - we now have png_create_read_struct(), png_create_write_struct(), - png_create_info_struct(), png_destroy_read_struct(), and - png_destroy_write_struct() instead of the separate calls to - malloc and png_read_init(), png_info_init(), and png_write_init() - changed warning/error callback functions to fix bug - this means you - should use the new initialization API if you were using the old - png_set_message_fn() calls, and that the old API no longer exists - so that people are aware that they need to change their code - changed filter selection API to allow selection of multiple filters - since it didn't work in previous versions of libpng anyways - optimized filter selection code - fixed png_set_background() to allow using an arbitrary RGB color for - paletted images - fixed gamma and background correction for paletted images, so - png_correct_palette is not needed unless you are correcting an - external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED - in pngconf.h) - if nobody uses this, it may disappear in the future. - fixed bug with Borland 64K memory allocation (Alexander Lehmann) - fixed bug in interlace handling (Smarasderagd, I think) - added more error checking for writing and image to reduce invalid files - separated read and write functions so that they won't both be linked - into a binary when only reading or writing functionality is used - new pngtest image also has interlacing and zTXt - updated documentation to reflect new API -version 0.90 [January, 1997] - made CRC errors/warnings on critical and ancillary chunks configurable - libpng will use the zlib CRC routines by (compile-time) default - changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner) - added external C++ wrapper statements to png.h (Gilles Dauphin) - allow PNG file to be read when some or all of file signature has already - been read from the beginning of the stream. ****This affects the size - of info_struct and invalidates all programs that use a shared libpng**** - fixed png_filler() declarations - fixed? background color conversions - fixed order of error function pointers to match documentation - current chunk name is now available in png_struct to reduce the number - of nearly identical error messages (will simplify multi-lingual - support when available) - try to get ready for unknown-chunk callback functions: - - previously read critical chunks are flagged, so the chunk handling - routines can determine if the chunk is in the right place - - all chunk handling routines have the same prototypes, so we will - be able to handle all chunks via a callback mechanism - try to fix Linux "setjmp" buffer size problems - removed png_large_malloc, png_large_free, and png_realloc functions. -version 0.95 [March, 1997] - fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never - fixed bug in PNG file signature compares when start != 0 - changed parameter type of png_set_filler(...filler...) from png_byte - to png_uint_32 - added test for MACOS to ensure that both math.h and fp.h are not #included - added macros for libpng to be compiled as a Windows DLL (Andreas Kupries) - added "packswap" transformation, which changes the endianness of - packed-pixel bytes (Kevin Bracey) - added "strip_alpha" transformation, which removes the alpha channel of - input images without using it (not neccesarily a good idea) - added "swap_alpha" transformation, which puts the alpha channel in front - of the color bytes instead of after - removed all implicit variable tests which assume NULL == 0 (I think) - changed several variables to "png_size_t" to show 16/32-bit limitations - added new pCAL chunk read/write support - added experimental filter selection weighting (Greg Roelofs) - removed old png_set_rgbx() and png_set_xrgb() functions that have been - obsolete for about 2 years now (use png_set_filler() instead) - added macros to read 16- and 32-bit ints directly from buffer, to be - used only on those systems that support it (namely PowerPC and 680x0) - With some testing, this may become the default for MACOS/PPC systems. - only calculate CRC on data if we are going to use it - added macros for zTXt compression type PNG_zTXt_COMPRESSION_??? - added macros for simple libpng debugging output selectable at compile time - removed PNG_READ_END_MODE in progressive reader (Smarasderagd) - more description of info_struct in libpng.txt and png.h - more instructions in example.c - more chunk types tested in pngtest.c - renamed pngrcb.c to pngset.c, and all png_read_ functions to be - png_set_. We now have corresponding png_get_ - functions in pngget.c to get infomation in info_ptr. This isolates - the application from the internal organization of png_info_struct - (good for shared library implementations). -version 0.96 [May, 1997] - fixed serious bug with < 8bpp images introduced in 0.95 - fixed 256-color transparency bug (Greg Roelofs) - fixed up documentation (Greg Roelofs, Laszlo Nyul) - fixed "error" in pngconf.h for Linux setjmp() behaviour - fixed DOS medium model support (Tim Wegner) - fixed png_check_keyword() for case with error in static string text - added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul) - added typecasts to quiet compiler errors - added more debugging info -version 0.97 [January, 1998] - removed PNG_USE_OWN_CRC capability - relocated png_set_crc_action from pngrutil.c to pngrtran.c - fixed typecasts of "new_key", etc. (Andreas Dilger) - added RFC 1152 [sic] date support - fixed bug in gamma handling of 4-bit grayscale - added 2-bit grayscale gamma handling (Glenn R-P) - added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P) - minor corrections in libpng.txt - added simple sRGB support (Glenn R-P) - easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED; - all configurable options can be selected from command-line instead - of having to edit pngconf.h (Glenn R-P) - fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P) - added more conditions for png_do_background, to avoid changing - black pixels to background when a background is supplied and - no pixels are transparent - repaired PNG_NO_STDIO behaviour - tested NODIV support and made it default behaviour (Greg Roelofs) - added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler) - regularized version numbering scheme and bumped shared-library major - version number to 2 to avoid problems with libpng 0.89 apps (Greg Roelofs) -version 0.98 [January, 1998] - cleaned up some typos in libpng.txt and in code documentation - fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler) - cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c - changed recommendation about file_gamma for PC images to .51 from .45, - in example.c and libpng.txt, added comments to distinguish between - screen_gamma, viewing_gamma, and display_gamma. - changed all references to RFC1152 to read RFC1123 and changed the - PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED - added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent) - changed srgb_intent from png_byte to int to avoid compiler bugs -version 0.99 [January 30, 1998] - free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler) - fixed a longstanding "packswap" bug in pngtrans.c - fixed some inconsistencies in pngconf.h that prevented compiling with - PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined - fixed some typos and made other minor rearrangement of libpng.txt (Andreas) - changed recommendation about file_gamma for PC images to .50 from .51 in - example.c and libpng.txt, and changed file_gamma for sRGB images to .45 - added a number of functions to access information from the png structure - png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit) - added TARGET_MACOS similar to zlib-1.0.8 - define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined - added type casting to all png_malloc() function calls -version 0.99a [January 31, 1998] - Added type casts and parentheses to all returns that return a value.(Tim W.) -version 0.99b [February 4, 1998] - Added type cast png_uint_32 on malloc function calls where needed. - Changed type of num_hist from png_uint_32 to int (same as num_palette). - Added checks for rowbytes overflow, in case png_size_t is less than 32 bits. - Renamed makefile.elf to makefile.lnx. -version 0.99c [February 7, 1998] - More type casting. Removed erroneous overflow test in pngmem.c. - Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes. - Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5. -version 0.99d [February 11, 1998] - Renamed "far_to_near()" "png_far_to_near()" - Revised libpng.3 - Version 99c "buffered" operations didn't work as intended. Replaced them - with png_memcpy_check() and png_memset_check(). - Added many "if (png_ptr == NULL) return" to quell compiler warnings about - unused png_ptr, mostly in pngget.c and pngset.c. - Check for overlength tRNS chunk present when indexed-color PLTE is read. - Cleaned up spelling errors in libpng.3/libpng.txt - Corrected a problem with png_get_tRNS() which returned undefined trans array -version 0.99e [February 28, 1998] - Corrected png_get_tRNS() again. - Add parentheses for easier reading of pngget.c, fixed "||" should be "&&". - Touched up example.c to make more of it compileable, although the entire - file still can't be compiled (Willem van Schaik) - Fixed a bug in png_do_shift() (Bryan Tsai) - Added a space in png.h prototype for png_write_chunk_start() - Replaced pngtest.png with one created with zlib 1.1.1 - Changed pngtest to report PASS even when file size is different (Jean-loup G.) - Corrected some logic errors in png_do_invert_alpha() (Chris Patterson) -version 0.99f [March 5, 1998] - Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey) - Moved makefiles into a "scripts" directory, and added INSTALL instruction file - Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok) - Added pointers to "note on libpng versions" in makefile.lnx and README - Added row callback feature when reading and writing nonprogressive rows - and added a test of this feature in pngtest.c - Added user transform callbacks, with test of the feature in pngtest.c -version 0.99g [March 6, 1998, morning] - Minor changes to pngtest.c to suppress compiler warnings. - Removed "beta" language from documentation. -version 0.99h [March 6, 1998, evening] - Minor changes to previous minor changes to pngtest.c - Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED - and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro - Added user transform capability -version 1.00 [March 7, 1998] - Changed several typedefs in pngrutil.c - Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik) - replaced "while(1)" with "for(;;)" - added PNGARG() to prototypes in pngtest.c and removed some prototypes - updated some of the makefiles (Tom Lane) - changed some typedefs (s_start, etc.) in pngrutil.c - fixed dimensions of "short_months" array in pngwrite.c - Replaced ansi2knr.c with the one from jpeg-v6 -version 1.0.0 [March 8, 1998] - Changed name from 1.00 to 1.0.0 (Adam Costello) - Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert) -version 1.0.0a [March 9, 1998] - Fixed three bugs in pngrtran.c to make gamma+background handling consistent - (Greg Roelofs) - Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz - for major, minor, and bugfix releases. This is 10001. (Adam Costello, - Tom Lane) - Make months range from 1-12 in png_convert_to_rfc1123 -version 1.0.0b [March 13, 1998] - Quieted compiler complaints about two empty "for" loops in pngrutil.c - Minor changes to makefile.s2x - Removed #ifdef/#endif around a png_free() in pngread.c -version 1.0.1 [March 14, 1998] - Changed makefile.s2x to reduce security risk of using a relative pathname - Fixed some typos in the documentation (Greg). - Fixed a problem with value of "channels" returned by png_read_update_info() -version 1.0.1a [April 21, 1998] - Optimized Paeth calculations by replacing abs() function calls with intrinsics - plus other loop optimizations. Improves avg decoding speed by about 20%. - Commented out i386istic "align" compiler flags in makefile.lnx. - Reduced the default warning level in some makefiles, to make them consistent. - Removed references to IJG and JPEG in the ansi2knr.c copyright statement. - Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation. - Added grayscale and 16-bit capability to png_do_read_filler(). - Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes - too large when writing an image with bit_depth < 8 (Bob Dellaca). - Corrected some bugs in the experimental weighted filtering heuristics. - Moved a misplaced pngrutil code block that truncates tRNS if it has more - than num_palette entries -- test was done before num_palette was defined. - Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins). - Changed compiler flags in makefile.wat for better optimization (Pawel Mrochen). -version 1.0.1b [May 2, 1998] - Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg). - Relocated the png_composite macros from pngrtran.c to png.h (Greg). - Added makefile.sco (contributed by Mike Hopkirk). - Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a. - Fixed a bug in pngrtran.c that would set channels=5 under some circumstances. - More work on the Paeth-filtering, achieving imperceptible speedup (A Kleinert). - More work on loop optimization which may help when compiled with C++ compilers. - Added warnings when people try to use transforms they've defined out. - Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran. - Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg) -version 1.0.1c [May 11, 1998] - Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for - filler bytes should have been 0xff instead of 0xf. - Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images. - Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED - out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h - Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED, - for consistency, in pngconf.h - Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier - to remove unwanted capabilities via the compile line - Made some corrections to grammar (which, it's) in documentation (Greg). - Corrected example.c, use of row_pointers in png_write_image(). -version 1.0.1d [May 24, 1998] - Corrected several statements that used side effects illegally in pngrutil.c - and pngtrans.c, that were introduced in version 1.0.1b - Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert) - More corrections to example.c, use of row_pointers in png_write_image() - and png_read_rows(). - Added pngdll.mak and pngdef.pas to scripts directory, contributed by - Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5 - Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.) - Changed several loops from count-down to count-up, for consistency. -version 1.0.1e [June 6, 1998] - Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and - added warnings when people try to set png_read_fn and png_write_fn in - the same structure. - Added a test such that png_do_gamma will be done when num_trans==0 - for truecolor images that have defined a background. This corrects an - error that was introduced in libpng-0.90 that can cause gamma processing - to be skipped. - Added tests in png.h to include "trans" and "trans_values" in structures - when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined. - Add png_free(png_ptr->time_buffer) in png_destroy_read_struct() - Moved png_convert_to_rfc_1123() from pngwrite.c to png.c - Added capability for user-provided malloc_fn() and free_fn() functions, - and revised pngtest.c to demonstrate their use, replacing the - PNGTEST_DEBUG_MEM feature. - Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner). -version 1.0.2 [June 14, 1998] - Fixed two bugs in makefile.bor . -version 1.0.2a [December 30, 1998] - Replaced and extended code that was removed from png_set_filler() in 1.0.1a. - Fixed a bug in png_do_filler() that made it fail to write filler bytes in - the left-most pixel of each row (Kevin Bracey). - Changed "static pngcharp tIME_string" to "static char tIME_string[30]" - in pngtest.c (Duncan Simpson). - Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk - even when no tIME chunk was present in the source file. - Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit. - Fixed a problem in png_read_push_finish_row(), which would not skip some - passes that it should skip, for images that are less than 3 pixels high. - Interchanged the order of calls to png_do_swap() and png_do_shift() - in pngwtran.c (John Cromer). - Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h . - Changed "bad adaptive filter type" from error to warning in pngrutil.c . - Fixed a documentation error about default filtering with 8-bit indexed-color. - Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO - (L. Peter Deutsch). - Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions. - Added png_get_copyright() and png_get_header_version() functions. - Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c - Added information about debugging in libpng.txt and libpng.3 . - Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and makefile.sco. - Removed lines after Dynamic Dependencies" in makefile.aco . - Revised makefile.dec to make a shared library (Jeremie Petit). - Removed trailing blanks from all files. -version 1.0.2a [January 6, 1999] - Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h - Added "if" tests to silence complaints about unused png_ptr in png.h and png.c - Changed "check_if_png" function in example.c to return true (nonzero) if PNG. - Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig() - which is obsolete. -version 1.0.3 [January 14, 1999] - Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice) - Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO. -version 1.0.3a [August 12, 1999] - Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning - if an attempt is made to read an interlaced image when it's not supported. - Added check if png_ptr->trans is defined before freeing it in pngread.c - Modified the Y2K statement to include versions back to version 0.71 - Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c - Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments) - Replaced leading blanks with tab characters in makefile.hux - Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents. - Changed (float)red and (float)green to (double)red, (double)green - in png_set_rgb_to_gray() to avoid "promotion" problems in AIX. - Fixed a bug in pngconf.h that omitted when PNG_DEBUG==0 (K Bracey). - Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt). - Updated documentation to refer to the PNG-1.2 specification. - Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c - in makefile.knr, INSTALL, and README (L. Peter Deutsch) - Fixed bugs in calculation of the length of rowbytes when adding alpha - channels to 16-bit images, in pngrtran.c (Chris Nokleberg) - Added function png_set_user_transform_info() to store user_transform_ptr, - user_depth, and user_channels into the png_struct, and a function - png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg) - Added function png_set_empty_plte_permitted() to make libpng useable - in MNG applications. - Corrected the typedef for png_free_ptr in png.h (Jesse Jones). - Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be - consistent with PNG-1.2, and allow variance of 500 before complaining. - Added assembler code contributed by Intel in file pngvcrd.c and modified - makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, Gilles Vollant) - Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy. - Added some aliases for png_set_expand() in pngrtran.c, namely - png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS() - (Greg Roelofs, in "PNG: The Definitive Guide"). - Added makefile.beo for BEOS on X86, contributed by Sander Stok. -version 1.0.3b [August 26, 1999] - Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h - Changed leading blanks to tabs in all makefiles. - Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code. - Made alternate versions of png_set_expand() in pngrtran.c, namely - png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha - (Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases. - Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h - Revised calculation of num_blocks in pngmem.c to avoid a potentially - negative shift distance, whose results are undefined in the C language. - Added a check in pngset.c to prevent writing multiple tIME chunks. - Added a check in pngwrite.c to detect invalid small window_bits sizes. -version 1.0.3d [September 4, 1999] - Fixed type casting of igamma in pngrutil.c - Added new png_expand functions to scripts/pngdef.pas and pngos2.def - Added a demo read_user_transform_fn that examines the row filters in pngtest.c -version 1.0.4 [September 24, 1999] - Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined - Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h - Made several minor corrections to pngtest.c - Renamed the makefiles with longer but more user friendly extensions. - Copied the PNG copyright and license to a separate LICENSE file. - Revised documentation, png.h, and example.c to remove reference to - "viewing_gamma" which no longer appears in the PNG specification. - Revised pngvcrd.c to use MMX code for interlacing only on the final pass. - Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a - Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX - assembler code) and makefile.vcwin32 (doesn't). - Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING) - Added a copy of pngnow.png to the distribution. -version 1.0.4a [September 25, 1999] - Increase max_pixel_depth in pngrutil.c if a user transform needs it. - Changed several division operations to right-shifts in pngvcrd.c -version 1.0.4b [September 30, 1999] - Added parentheses in line 3732 of pngvcrd.c - Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1 -version 1.0.4c [October 1, 1999] - Added a "png_check_version" function in png.c and pngtest.c that will generate - a helpful compiler error if an old png.h is found in the search path. - Changed type of png_user_transform_depth|channels from int to png_byte. -version 1.0.4d [October 6, 1999] - Changed 0.45 to 0.45455 in png_set_sRGB() - Removed unused PLTE entries from pngnow.png - Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly. -version 1.0.4e [October 10, 1999] - Fixed sign error in pngvcrd.c (Greg Roelofs) - Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P) -version 1.0.4f [October 15, 1999] - Surrounded example.c code with #if 0 .. #endif to prevent people from - inadvertently trying to compile it. - Changed png_get_header_version() from a function to a macro in png.h - Added type casting mostly in pngrtran.c and pngwtran.c - Removed some pointless "ptr = NULL" in pngmem.c - Added a "contrib" directory containing the source code from Greg's book. -version 1.0.5 [October 15, 1999] - Minor editing of the INSTALL and README files. -version 1.0.5a [October 23, 1999] - Added contrib/pngsuite and contrib/pngminus (Willem van Schaik) - Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans) - Further optimization and bugfix of pngvcrd.c - Revised pngset.c so that it does not allocate or free memory in the user's - text_ptr structure. Instead, it makes its own copy. - Created separate write_end_info_struct in pngtest.c for a more severe test. - Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak. -version 1.0.5b [November 23, 1999] - Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and - PNG_FLAG_WROTE_tIME from flags to mode. - Added png_write_info_before_PLTE() function. - Fixed some typecasting in contrib/gregbook/*.c - Updated scripts/makevms.com and added makevms.com to contrib/gregbook - and contrib/pngminus (Martin Zinser) -version 1.0.5c [November 26, 1999] - Moved png_get_header_version from png.h to png.c, to accomodate ansi2knr. - Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to - accomodate making DLL's: Moved usr_png_ver from global variable to function - png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and - eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays - into pngtypes.h. Eliminated use of global png_pass arrays. Declared the - png_CHNK and png_pass arrays to be "const". Made the global arrays - available to applications (although none are used in libpng itself) when - PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined. - Removed some extraneous "-I" from contrib/pngminus/makefile.std - Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2. - Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3 -version 1.0.5d [November 29, 1999] - Add type cast (png_const_charp) two places in png.c - Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays. - Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available - to applications a macro "PNG_USE_LOCAL_ARRAYS". - #ifdef out all the new declarations when PNG_USE_GLOBAL_ARRAYS is defined. - Added PNG_EXPORT_VAR macro to accommodate making DLL's. -version 1.0.5e [November 30, 1999] - Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text - structure; refactored the inflate/deflate support to make adding new chunks - with trailing compressed parts easier in the future, and added new functions - png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP, - png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond). - NOTE: Applications that write text chunks MUST define png_text->lang - before calling png_set_text(). It must be set to NULL if you want to - write tEXt or zTXt chunks. If you want your application to be able to - run with older versions of libpng, use - - #ifdef PNG_iTXt_SUPPORTED - png_text[i].lang = NULL; - #endif - - Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned - offsets (Eric S. Raymond). - Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into - PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED - macros, leaving the separate macros also available. - Removed comments on #endifs at the end of many short, non-nested #if-blocks. -version 1.0.5f [December 6, 1999] - Changed makefile.solaris to issue a warning about potential problems when - the ucb "ld" is in the path ahead of the ccs "ld". - Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3. - Added sCAL chunk support (Eric S. Raymond). -version 1.0.5g [December 7, 1999] - Fixed "png_free_spallettes" typo in png.h - Added code to handle new chunks in pngpread.c - Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block - Added "translated_key" to png_text structure and png_write_iTXt(). - Added code in pngwrite.c to work around a newly discovered zlib bug. -version 1.0.5h [December 10, 1999] - NOTE: regarding the note for version 1.0.5e, the following must also - be included in your code: - png_text[i].translated_key = NULL; - Unknown chunk handling is now supported. - Option to eliminate all floating point support was added. Some new - fixed-point functions such as png_set_gAMA_fixed() were added. - Expanded tabs and removed trailing blanks in source files. -version 1.0.5i [December 13, 1999] - Added some type casts to silence compiler warnings. - Renamed "png_free_spalette" to "png_free_spalettes" for consistency. - Removed leading blanks from a #define in pngvcrd.c - Added some parameters to the new png_set_keep_unknown_chunks() function. - Added a test for up->location != 0 in the first instance of writing - unknown chunks in pngwrite.c - Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to - prevent recursion. - Added png_free_hIST() function. - Various patches to fix bugs in the sCAL and integer cHRM processing, - and to add some convenience macros for use with sCAL. -version 1.0.5j [December 21, 1999] - Changed "unit" parameter of png_write_sCAL from png_byte to int, to work - around buggy compilers. - Added new type "png_fixed_point" for integers that hold float*100000 values - Restored backward compatibility of tEXt/zTXt chunk processing: - Restored the first four members of png_text to the same order as v.1.0.5d. - Added members "lang_key" and "itxt_length" to png_text struct. Set - text_length=0 when "text" contains iTXt data. Use the "compression" - member to distinguish among tEXt/zTXt/iTXt types. Added - PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros. - The "Note" above, about backward incompatibility of libpng-1.0.5e, no - longer applies. - Fixed png_read|write_iTXt() to read|write parameters in the right order, - and to write the iTXt chunk after IDAT if it appears in the end_ptr. - Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs) - Reversed the order of trying to write floating-point and fixed-point gAMA. -version 1.0.5k [December 27, 1999] - Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))" - Added png_handle_as_unknown() function (Glenn) - Added png_free_chunk_list() function and chunk_list and num_chunk_list members - of png_ptr. - Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE. - Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings - about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored) - Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR). - Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is. - Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP(). -version 1.0.5l [January 1, 2000] - Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr() - for setting a callback function to handle unknown chunks and for - retrieving the associated user pointer (Glenn). -version 1.0.5m [January 7, 2000] - Added high-level functions png_read_png(), png_write_png(), png_free_pixels(). -version 1.0.5n [January 9, 2000] - Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its - own memory for info_ptr->palette. This makes it safe for the calling - application to free its copy of the palette any time after it calls - png_set_PLTE(). -version 1.0.5o [January 20, 2000] - Cosmetic changes only (removed some trailing blanks and TABs) -version 1.0.5p [January 31, 2000] - Renamed pngdll.mak to makefile.bd32 - Cosmetic changes in pngtest.c -version 1.0.5q [February 5, 2000] - Relocated the makefile.solaris warning about PATH problems. - Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg) - Revised makefile.gcmmx - Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros -version 1.0.5r [February 7, 2000] - Removed superfluous prototype for png_get_itxt from png.h - Fixed a bug in pngrtran.c that improperly expanded the background color. - Return *num_text=0 from png_get_text() when appropriate, and fix documentation - of png_get_text() in libpng.txt/libpng.3. -version 1.0.5s [February 18, 2000] - Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the - new error handler that's planned for the next libpng release, and changed - example.c, pngtest.c, and contrib programs to use this macro. - Revised some of the DLL-export macros in pngconf.h (Greg Roelofs) - Fixed a bug in png_read_png() that caused it to fail to expand some images - that it should have expanded. - Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions - in pngget.c - Changed the allocation of palette, history, and trans arrays back to - the version 1.0.5 method (linking instead of copying) which restores - backward compatibility with version 1.0.5. Added some remarks about - that in example.c. Added "free_me" member to info_ptr and png_ptr - and added png_free_data() function. - Updated makefile.linux and makefile.gccmmx to make directories conditionally. - Made cosmetic changes to pngasmrd.h - Added png_set_rows() and png_get_rows(), for use with png_read|write_png(). - Modified png_read_png() to allocate info_ptr->row_pointers only if it - hasn't already been allocated. -version 1.0.5t [March 4, 2000] - Changed png_jmp_env() migration aiding macro to png_jmpbuf(). - Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c - Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when - PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b - Files in contrib/gregbook were revised to use png_jmpbuf() and to select - a 24-bit visual if one is available, and to allow abbreviated options. - Files in contrib/pngminus were revised to use the png_jmpbuf() macro. - Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s -version 1.0.5u [March 5, 2000] - Simplified the code that detects old png.h in png.c and pngtest.c - Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp) - Increased precision of rgb_to_gray calculations from 8 to 15 bits and - added png_set_rgb_to_gray_fixed() function. - Added makefile.bc32 (32-bit Borland C++, C mode) -version 1.0.5v [March 11, 2000] - Added some parentheses to the png_jmpbuf macro definition. - Updated references to the zlib home page, which has moved to freesoftware.com. - Corrected bugs in documentation regarding png_read_row() and png_write_row(). - Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt. - Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3, - revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin) -version 1.0.6 [March 20, 2000] - Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c - Added makefile.sggcc (SGI IRIX with gcc) -version 1.0.6d [April 7, 2000] - Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO - Added data_length parameter to png_decompress_chunk() function - Revised documentation to remove reference to abandoned png_free_chnk functions - Fixed an error in png_rgb_to_gray_fixed() - Revised example.c, usage of png_destroy_write_struct(). - Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file - Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c - Simplify png_sig_bytes() function to remove use of non-ISO-C strdup(). -version 1.0.6e [April 9, 2000] - Added png_data_freer() function. - In the code that checks for over-length tRNS chunks, added check of - info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann) - Minor revisions of libpng.txt/libpng.3. - Check for existing data and free it if the free_me flag is set, in png_set_*() - and png_handle_*(). - Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED - is defined. - Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c - and mentioned the purposes of the two macros in libpng.txt/libpng.3. -version 1.0.6f [April 14, 2000] - Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data. - Add checks in png_set_text() for NULL members of the input text structure. - Revised libpng.txt/libpng.3. - Removed superfluous prototype for png_set_itxt from png.h - Removed "else" from pngread.c, after png_error(), and changed "0" to "length". - Changed several png_errors about malformed ancillary chunks to png_warnings. -version 1.0.6g [April 24, 2000] - Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined. - Relocated paragraph about png_set_background() in libpng.3/libpng.txt - and other revisions (Matthias Benckmann) - Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and - png_ptr members to restore binary compatibility with libpng-1.0.5 - (breaks compatibility with libpng-1.0.6). -version 1.0.6h [April 24, 2000] - Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds - libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h) - This is a temporary change for test purposes. -version 1.0.6i [May 2, 2000] - Rearranged some members at the end of png_info and png_struct, to put - unknown_chunks_num and free_me within the original size of the png_structs - and free_me, png_read_user_fn, and png_free_fn within the original png_info, - because some old applications allocate the structs directly instead of - using png_create_*(). - Added documentation of user memory functions in libpng.txt/libpng.3 - Modified png_read_png so that it will use user_allocated row_pointers - if present, unless free_me directs that it be freed, and added description - of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3. - Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version - 1.00) members of png_struct and png_info, to regain binary compatibility - when you define this macro. Capabilities lost in this event - are user transforms (new in version 1.0.0),the user transform pointer - (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT, - the high-level interface, and unknown chunks support (all new in 1.0.6). - This was necessary because of old applications that allocate the structs - directly as authors were instructed to do in libpng-0.88 and earlier, - instead of using png_create_*(). - Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which - can be used to detect codes that directly allocate the structs, and - code to check these modes in png_read_init() and png_write_init() and - generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED - was not defined. - Added makefile.intel and updated makefile.watcom (Pawel Mrochen) -version 1.0.6j [May 3, 2000] - Overloaded png_read_init() and png_write_init() with macros that convert - calls to png_read_init_2() or png_write_init_2() that check the version - and structure sizes. -version 1.0.7beta11 [May 7, 2000] - Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes - which are no longer used. - Eliminated the three new members of png_text when PNG_NO_iTXt_SUPPORTED - or PNG_LEGACY_SUPPORTED is defined. - Made PNG_NO_ITXT_SUPPORTED the default setting, to avoid memory overrun - when old applications fill the info_ptr->text structure directly. - Added PNGAPI macro, and added it to the definitions of all exported functions. - Relocated version macro definitions ahead of the includes of zlib.h and - pngconf.h in png.h. -version 1.0.7beta12 [May 12, 2000] - Revised pngset.c to avoid a problem with expanding the png_debug macro. - Deleted some extraneous defines from pngconf.h - Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined. - Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined. - Added png_access_version_number() function. - Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data(). - Expanded libpng.3/libpng.txt information about png_data_freer(). -version 1.0.7beta14 [May 17, 2000] (beta13 was not published) - Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as - warnings instead of errors, as pngrutil.c does. - Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png() - will actually write IDATs. - Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32. - Make png_free_data() ignore its final parameter except when freeing data - that can have multiple instances (text, sPLT, unknowns). - Fixed a new bug in png_set_rows(). - Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5. - Added png_set_invalid() function. - Fixed incorrect illustrations of png_destroy_write_struct() in example.c. -version 1.0.7beta15 [May 30, 2000] - Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce - fewer error messages. - Rearranged checks for Z_OK to check the most likely path first in pngpread.c - and pngwutil.c. - Added checks in pngtest.c for png_create_*() returning NULL, and mentioned - in libpng.txt/libpng.3 the need for applications to check this. - Changed names of png_default_*() functions in pngtest to pngtest_*(). - Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32. - Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c - Set each pointer to NULL after freeing it in png_free_data(). - Worked around a problem in pngconf.h; AIX's strings.h defines an "index" - macro that conflicts with libpng's png_color_16.index. (Dimitri Papadapoulos) - Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux). -version 1.0.7beta16 [June 4, 2000] - Revised the workaround of AIX string.h "index" bug. - Added a check for overlength PLTE chunk in pngrutil.c. - Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer - indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler. - Added a warning in png_decompress_chunk() when it runs out of data, e.g. - when it tries to read an erroneous PhotoShop iCCP chunk. - Added PNG_USE_DLL macro. - Revised the copyright/disclaimer/license notice. - Added contrib/msvctest directory -version 1.0.7rc1 [June 9, 2000] - Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200) - Added contrib/visupng directory (Willem van Schaik) -version 1.0.7beta18 [June 23, 2000] - Revised PNGAPI definition, and pngvcrd.c to work with __GCC__ - and do not redefine PNGAPI if it is passed in via a compiler directive. - Revised visupng/PngFile.c to remove returns from within the Try block. - Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros. - Updated contrib/visupng/cexcept.h to version 1.0.0. - Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks. -version 1.0.7rc2 [June 28, 2000] - Updated license to include disclaimers required by UCITA. - Fixed "DJBPP" typo in pnggccrd.c introduced in beta18. -version 1.0.7 [July 1, 2000] - Revised the definition of "trans_values" in libpng.3/libpng.txt -version 1.0.8beta1 [July 8, 2000] - Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks. - Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and - pngwutil.c. - Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h. - Removed unused "#include " from png.c - Added WindowsCE support. - Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment. -version 1.0.8beta2 [July 10, 2000] - Added project files to the wince directory and made further revisions - of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE. -version 1.0.8beta3 [July 11, 2000] - Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS() - for indexed-color input files to avoid potential double-freeing trans array - under some unusual conditions; problem was introduced in version 1.0.6f. - Further revisions to pngtest.c and files in the wince subdirectory. -version 1.0.8beta4 [July 14, 2000] - Added the files pngbar.png and pngbar.jpg to the distribution. - Added makefile.cygwin, and cygwin support in pngconf.h - Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory) -version 1.0.8rc1 [July 16, 2000] - Revised png_debug() macros and statements to eliminate compiler warnings. -version 1.0.8 [July 24, 2000] - Added png_flush() in pngwrite.c, after png_write_IEND(). - Updated makefile.hpux to build a shared library. -version 1.0.9beta1 [November 10, 2000] - Fixed typo in scripts/makefile.hpux - Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser) - Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser) - Changed "cdrom.com" in documentation to "libpng.org" - Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg). - Changed type of "params" from voidp to png_voidp in png_read|write_png(). - Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h. - Revised the 3 instances of WRITEFILE in pngtest.c. - Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory. - Updated png.rc in dll/msvc project - Revised makefile.dec to define and use LIBPATH and INCPATH - Increased size of global png_libpng_ver[] array from 12 to 18 chars. - Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const. - Removed duplicate png_crc_finish() from png_handle_bKGD() function. - Added a warning when application calls png_read_update_info() multiple times. - Revised makefile.cygwin - Fixed bugs in iCCP support in pngrutil.c and pngwutil.c. - Replaced png_set_empty_plte_permitted() with png_permit_mng_features(). -version 1.0.9beta2 [November 19, 2000] - Renamed the "dll" subdirectory "projects". - Added borland project files to "projects" subdirectory. - Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate. - Add error message in png_set_compression_buffer_size() when malloc fails. -version 1.0.9beta3 [November 23, 2000] - Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project. - Removed the png_flush() in pngwrite.c that crashes some applications - that don't set png_output_flush_fn. - Added makefile.macosx and makefile.aix to scripts directory. -version 1.0.9beta4 [December 1, 2000] - Change png_chunk_warning to png_warning in png_check_keyword(). - Increased the first part of msg buffer from 16 to 18 in png_chunk_error(). -version 1.0.9beta5 [December 15, 2000] - Added support for filter method 64 (for PNG datastreams embedded in MNG). -version 1.0.9beta6 [December 18, 2000] - Revised png_set_filter() to accept filter method 64 when appropriate. - Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to - help prevent applications from using MNG features in PNG datastreams. - Added png_permit_mng_features() function. - Revised libpng.3/libpng.txt. Changed "filter type" to "filter method". -version 1.0.9rc1 [December 23, 2000] - Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c - Fixed error handling of unknown compression type in png_decompress_chunk(). - In pngconf.h, define __cdecl when _MSC_VER is defined. -version 1.0.9beta7 [December 28, 2000] - Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places. - Revised memory management in png_set_hIST and png_handle_hIST in a backward - compatible manner. PLTE and tRNS were revised similarly. - Revised the iCCP chunk reader to ignore trailing garbage. -version 1.0.9beta8 [January 12, 2001] - Moved pngasmrd.h into pngconf.h. - Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop. -version 1.0.9beta9 [January 15, 2001] - Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to - wince and msvc project module definition files. - Minor revision of makefile.cygwin. - Fixed bug with progressive reading of narrow interlaced images in pngpread.c -version 1.0.9beta10 [January 16, 2001] - Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined. - Fixed "png_mmx_supported" typo in project definition files. -version 1.0.9beta11 [January 19, 2001] - Updated makefile.sgi to make shared library. - Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED - by default, for the benefit of DLL forward compatibility. These will - be re-enabled in version 1.2.0. -version 1.0.9rc2 [January 22, 2001] - Revised cygwin support. -version 1.0.9 [January 31, 2001] - Added check of cygwin's ALL_STATIC in pngconf.h - Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos. - -Send comments/corrections/commendations to -png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu - -Glenn R-P diff --git a/libraries/libpng-1.0.9/INSTALL b/libraries/libpng-1.0.9/INSTALL deleted file mode 100644 index 71a0afa..0000000 --- a/libraries/libpng-1.0.9/INSTALL +++ /dev/null @@ -1,134 +0,0 @@ - -Installing libpng version 1.0.9 - January 31, 2001 - -Before installing libpng, you must first install zlib. zlib -can usually be found wherever you got libpng. zlib can be -placed in another directory, at the same level as libpng. -Note that your system might already have a preinstalled -zlib, but you will still need to have access to the -zlib.h and zconf.h include files that correspond to the -version of zlib that's installed. - -You can rename the directories that you downloaded (they -might be called "libpng-1.0.9" or "lpng109" and "zlib-1.1.3" -or "zlib113") so that you have directories called "zlib" and "libpng". - -Your directory structure should look like this: - - .. (the parent directory) - libpng (this directory) - INSTALL (this file) - README - *.h - *.c - contrib - gregbook - msvctest - pngminus - pngsuite - visupng - projects - borland - msvc - wince - scripts - makefile.* - pngtest.png - etc. - zlib - README - *.h - *.c - contrib - etc. - -If the line endings in the files look funny, you may wish to get the other -distribution of libpng. It is available in both tar.gz (UNIX style line -endings) and zip (DOS style line endings) formats. - -If you are building libpng with MSVC, you can enter the libpng\msvc directory -and follow the instructions in msvc\README.txt. You can build libpng for -WindowsCE by entering the libpng\wince directory and following the -instructions in the README* files. - -Else enter the zlib directory and follow the instructions in zlib/README, -then come back here and choose the appropriate makefile.sys in the scripts -directory. - -The files that are presently available in the scripts directory -include - - makefile.std => Generic UNIX makefile (cc, creates static libpng.a) - makefile.linux => Linux/ELF makefile (gcc, creates libpng.so.2.1.0.9) - makefile.gcmmx => Linux/ELF makefile (gcc, creates libpng.so.2.1.0.9, - uses assembler code tuned for Intel MMX platform) - makefile.gcc => Generic makefile (gcc, creates static libpng.a) - makefile.knr => Archaic UNIX Makefile that converts files with - ansi2knr (Requires ansi2knr.c from - ftp://ftp.cs.wisc.edu/ghost) - makefile.aix => AIX makefile - makefile.cygwin => Cygwin/gcc makefile - makefile.dec => DEC Alpha UNIX makefile - makefile.hpux => HPUX (10.20 and 11.00) makefile - makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static) - makefile.intel => Intel C/C++ version 4.0 and later - libpng.icc => Project file for IBM VisualAge/C++ version 4.0 or later - makefile.macosx => MACOS X Makefile - makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib) - makefile.sggcc => Silicon Graphics (gcc, creates libpng.so.2.1.0.9) - makefile.sunos => Sun makefile - makefile.solaris => Solaris 2.X makefile (gcc, creates libpng.so.2.1.0.9) - makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc - makefile.mips => MIPS makefile - makefile.acorn => Acorn makefile - makefile.amiga => Amiga makefile - smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC compiler - (Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc) - makefile.atari => Atari makefile - makefile.beos => BEOS makefile for X86 - makefile.bor => Borland makefile (uses bcc) - makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode) - makefile.bd32 => To make a png32bd.dll with Borland C++ 4.5 - makefile.tc3 => Turbo C 3.0 makefile - makefile.dj2 => DJGPP 2 makefile - makefile.msc => Microsoft C makefile - makefile.vcawin32 => makefile for Microsoft Visual C++ 5.0 and later (uses - assembler code tuned for Intel MMX platform) - makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and later (does - not use assembler code) - makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def) - pngos2.def => OS/2 module definition file used by makefile.os2 - makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model - makevms.com => VMS build script - descrip.mms => VMS makefile for MMS or MMK - pngdef.pas => Defines for a png32bd.dll with Borland C++ 4.5 - SCOPTIONS.ppc => Used with smakefile.ppc - -Copy the file (or files) that you need from the -scripts directory into this directory, for example - - MSDOS example: copy scripts\makefile.msc makefile - UNIX example: cp scripts/makefile.std makefile - -Read the makefile to see if you need to change any source or -target directories to match your preferences. - -Then read pngconf.h to see if you want to make any configuration -changes. - -Then just run "make test" which will create the libpng library in -this directory and run a quick test that reads the "pngtest.png" -file and writes a "pngout.png" file that should be identical to it. -Look for "9782 zero samples" in the output of the test. For more -confidence, you can run another test by typing "pngtest pngnow.png" -and looking for "289 zero samples" in the output. Also, you can -run "pngtest -m *.png" in the "contrib/pngsuite" directory and compare -your output with the result shown in contrib/pngsuite/README. - -Most of the makefiles will allow you to run "make install" to -put the library in its final resting place (if you want to -do that, run "make install" in the zlib directory first if necessary). - -Further information can be found in the README and libpng.txt -files, in the individual makefiles, in png.h, in the README files in -subdirectories of the LIB directory, and the manual pages libpng.3 and png.5. diff --git a/libraries/libpng-1.0.9/KNOWNBUG b/libraries/libpng-1.0.9/KNOWNBUG deleted file mode 100644 index 82d2cd6..0000000 --- a/libraries/libpng-1.0.9/KNOWNBUG +++ /dev/null @@ -1,4 +0,0 @@ - -Known bugs in libpng-1.0.9 - -None. diff --git a/libraries/libpng-1.0.9/LICENSE b/libraries/libpng-1.0.9/LICENSE deleted file mode 100644 index b756e34..0000000 --- a/libraries/libpng-1.0.9/LICENSE +++ /dev/null @@ -1,102 +0,0 @@ - -This copy of the libpng notices is provided for your convenience. In case of -any discrepancy between this copy and the notices in the file png.h that is -included in the libpng distribution, the latter shall prevail. - -COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: - -If you modify libpng you may insert additional notices immediately following -this sentence. - -libpng versions 1.0.7, July 1, 2000, through 1.0.9, January 31, 2001, are -Copyright (c) 2000 Glenn Randers-Pehrson -and are distributed according to the same disclaimer and license as libpng-1.0.6 -with the following individuals added to the list of Contributing Authors - - Simon-Pierre Cadieux - Eric S. Raymond - Gilles Vollant - -and with the following additions to the disclaimer: - - There is no warranty against interference with your enjoyment of the - library or against infringement. There is no warranty that our - efforts or the library will fulfill any of your particular purposes - or needs. This library is provided with all faults, and the entire - risk of satisfactory quality, performance, accuracy, and effort is with - the user. - -libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are -Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are -distributed according to the same disclaimer and license as libpng-0.96, -with the following individuals added to the list of Contributing Authors: - - Tom Lane - Glenn Randers-Pehrson - Willem van Schaik - -libpng versions 0.89, June 1996, through 0.96, May 1997, are -Copyright (c) 1996, 1997 Andreas Dilger -Distributed according to the same disclaimer and license as libpng-0.88, -with the following individuals added to the list of Contributing Authors: - - John Bowler - Kevin Bracey - Sam Bushell - Magnus Holmgren - Greg Roelofs - Tom Tanner - -libpng versions 0.5, May 1995, through 0.88, January 1996, are -Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - -For the purposes of this copyright and license, "Contributing Authors" -is defined as the following set of individuals: - - Andreas Dilger - Dave Martindale - Guy Eric Schalnat - Paul Schmidt - Tim Wegner - -The PNG Reference Library is supplied "AS IS". The Contributing Authors -and Group 42, Inc. disclaim all warranties, expressed or implied, -including, without limitation, the warranties of merchantability and of -fitness for any purpose. The Contributing Authors and Group 42, Inc. -assume no liability for direct, indirect, incidental, special, exemplary, -or consequential damages, which may result from the use of the PNG -Reference Library, even if advised of the possibility of such damage. - -Permission is hereby granted to use, copy, modify, and distribute this -source code, or portions hereof, for any purpose, without fee, subject -to the following restrictions: - -1. The origin of this source code must not be misrepresented. - -2. Altered versions must be plainly marked as such and must not - be misrepresented as being the original source. - -3. This Copyright notice may not be removed or altered from any - source or altered source distribution. - -The Contributing Authors and Group 42, Inc. specifically permit, without -fee, and encourage the use of this source code as a component to -supporting the PNG file format in commercial products. If you use this -source code in a product, acknowledgment is not required but would be -appreciated. - - -A "png_get_copyright" function is available, for convenient use in "about" -boxes and the like: - - printf("%s",png_get_copyright(NULL)); - -Also, the PNG logo (in PNG format, of course) is supplied in the -files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). - -Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a -certification mark of the Open Source Initiative. - -Glenn Randers-Pehrson -randeg@alum.rpi.edu -January 31, 2001 diff --git a/libraries/libpng-1.0.9/Makefil b/libraries/libpng-1.0.9/Makefil deleted file mode 100644 index e69de29..0000000 diff --git a/libraries/libpng-1.0.9/Makefile.am b/libraries/libpng-1.0.9/Makefile.am deleted file mode 100644 index 457f674..0000000 --- a/libraries/libpng-1.0.9/Makefile.am +++ /dev/null @@ -1,29 +0,0 @@ -## Process this file with automake to produce Makefile.in - -ZLIB_LIB_DIR = @ZLIB_LIB_DIR@ - -INCLUDES = -I$(top_srcdir)/$(ZLIB_LIB_DIR) - -EXTRA_DIST= ANNOUNCE CHANGES INSTALL KNOWNBUG README README.rrdtool \ - TODO Y2KINFO example.c libpng.3 \ - libpng.txt libpngpf.3 png.5 png.dsp png.dsw - -noinst_LTLIBRARIES = librrd_png.la - -librrd_png_la_SOURCES = \ - png.c \ - pngerror.c \ - pngget.c \ - pngmem.c \ - pngpread.c \ - pngread.c \ - pngrio.c \ - pngrtran.c \ - pngrutil.c \ - pngset.c \ - pngtrans.c \ - pngwio.c \ - pngwrite.c \ - pngwtran.c \ - pngwutil.c \ - png.h pngconf.h diff --git a/libraries/libpng-1.0.9/README b/libraries/libpng-1.0.9/README deleted file mode 100644 index d5d1a40..0000000 --- a/libraries/libpng-1.0.9/README +++ /dev/null @@ -1,244 +0,0 @@ -README for libpng 1.0.9 - January 31, 2001 (shared library 2.1) -See the note about version numbers near the top of png.h - -See INSTALL for instructions on how to install libpng. - -Libpng comes in two distribution formats. Get libpng-*.tar.gz if you -want UNIX-style line endings in the text files, or lpng*.zip if you want -DOS-style line endings. - -Version 0.89 was the first official release of libpng. Don't let the -fact that it's the first release fool you. The libpng library has been in -extensive use and testing since mid-1995. By late 1997 it had -finally gotten to the stage where there hadn't been significant -changes to the API in some time, and people have a bad feeling about -libraries with versions < 1.0. Version 1.0.0 was released in -March 1998. - -**** -Note that some of the changes to the png_info structure render this -version of the library binary incompatible with libpng-0.89 or -earlier versions if you are using a shared library. The type of the -"filler" parameter for png_set_filler() has changed from png_byte to -png_uint_32, which will affect shared-library applications that use -this function. - -To avoid problems with changes to the internals of png_info_struct, -new APIs have been made available in 0.95 to avoid direct application -access to info_ptr. These functions are the png_set_ and -png_get_ functions. These functions should be used when -accessing/storing the info_struct data, rather than manipulating it -directly, to avoid such problems in the future. - -It is important to note that the APIs do not make current programs -that access the info struct directly incompatible with the new -library. However, it is strongly suggested that new programs use -the new APIs (as shown in example.c and pngtest.c), and older programs -be converted to the new format, to facilitate upgrades in the future. -**** - -Additions since 0.90 include the ability to compile libpng as a -Windows DLL, and new APIs for accessing data in the info struct. -Experimental functions include the ability to set weighting and cost -factors for row filter selection, direct reads of integers from buffers -on big-endian processors that support misaligned data access, faster -methods of doing alpha composition, and more accurate 16->8 bit color -conversion. - -The additions since 0.89 include the ability to read from a PNG stream -which has had some (or all) of the signature bytes read by the calling -application. This also allows the reading of embedded PNG streams that -do not have the PNG file signature. As well, it is now possible to set -the library action on the detection of chunk CRC errors. It is possible -to set different actions based on whether the CRC error occurred in a -critical or an ancillary chunk. - -The changes made to the library, and bugs fixed are based on discussions -on the PNG implementation mailing list -and not on material submitted privately to Guy, Andreas, or Glenn. They will -forward any good suggestions to the list. - -For a detailed description on using libpng, read libpng.txt. For -examples of libpng in a program, see example.c and pngtest.c. For usage -information and restrictions (what little they are) on libpng, see -png.h. For a description on using zlib (the compression library used by -libpng) and zlib's restrictions, see zlib.h - -I have included a general makefile, as well as several machine and -compiler specific ones, but you may have to modify one for your own needs. - -You should use zlib 1.0.4 or later to run this, but it MAY work with -versions as old as zlib 0.95. Even so, there are bugs in older zlib -versions which can cause the output of invalid compression streams for -some images. You will definitely need zlib 1.0.4 or later if you are -taking advantage of the MS-DOS "far" structure allocation for the small -and medium memory models. You should also note that zlib is a -compression library that is useful for more things than just PNG files. -You can use zlib as a drop-in replacement for fread() and fwrite() if -you are so inclined. - -zlib should be available at the same place that libpng is. -If not, it should be at ftp.uu.net in /graphics/png -Eventually, it will be at ftp.uu.net in /pub/archiving/zip/zlib - -You may also want a copy of the PNG specification. It is available -as an RFC and a W3C Recommendation. Failing -these resources you can try ftp.uu.net in the /graphics/png directory. - -This code is currently being archived at ftp.uu.net in the -/graphics/png directory, and on CompuServe, Lib 20 (PNG SUPPORT) -at GO GRAPHSUP. If you can't find it in any of those places, -e-mail me, and I'll help you find it. - -If you have any code changes, requests, problems, etc., please e-mail -them to me. Also, I'd appreciate any make files or project files, -and any modifications you needed to make to get libpng to compile, -along with a #define variable to tell what compiler/system you are on. -If you needed to add transformations to libpng, or wish libpng would -provide the image in a different way, drop me a note (and code, if -possible), so I can consider supporting the transformation. -Finally, if you get any warning messages when compiling libpng -(note: not zlib), and they are easy to fix, I'd appreciate the -fix. Please mention "libpng" somewhere in the subject line. Thanks. - -This release was created and will be supported by myself (of course -based in a large way on Guy's and Andreas' earlier work), and the PNG group. - -randeg@alum.rpi.edu -png-implement@ccrc.wustl.edu - -You can't reach Guy, the original libpng author, at the addresses -given in previous versions of this document. He and Andreas will read mail -addressed to the png-implement list, however. - -Please do not send general questions about PNG. Send them to -the address in the specification (png-group@w3.org). At the same -time, please do not send libpng questions to that address, send them to me -or to png-implement@ccrc.wustl.edu. I'll -get them in the end anyway. If you have a question about something -in the PNG specification that is related to using libpng, send it -to me. Send me any questions that start with "I was using libpng, -and ...". If in doubt, send questions to me. I'll bounce them -to others, if necessary. - -Please do not send suggestions on how to change PNG. We have -been discussing PNG for three years now, and it is official and -finished. If you have suggestions for libpng, however, I'll -gladly listen. Even if your suggestion is not used for version -1.0, it may be used later. - -Files in this distribution: - - ANNOUNCE => Announcement of this version, with recent changes - CHANGES => Description of changes between libpng versions - KNOWNBUG => List of known bugs and deficiencies - LICENSE => License to use and redistribute libpng - README => This file - TODO => Things not implemented in the current library - Y2KINFO => Statement of Y2K compliance - example.c => Example code for using libpng functions - libpng.3 => manual page for libpng (includes libpng.txt) - libpng.txt => Description of libpng and its functions - libpngpf.3 => manual page for libpng's private functions - png.5 => manual page for the PNG format - png.c => Basic interface functions common to library - png.h => Library function and interface declarations - pngconf.h => System specific library configuration - pngasmrd.h => Header file for assembler-coded functions - pngerror.c => Error/warning message I/O functions - pngget.c => Functions for retrieving info from struct - pngmem.c => Memory handling functions - pngbar.png => PNG logo, 88x31 - pngnow.png => PNG logo, 98x31 - pngpread.c => Progressive reading functions - pngread.c => Read data/helper high-level functions - pngrio.c => Lowest-level data read I/O functions - pngrtran.c => Read data transformation functions - pngrutil.c => Read data utility functions - pngset.c => Functions for storing data into the info_struct - pngtest.c => Library test program - pngtest.png => Library test sample image - pngtrans.c => Common data transformation functions - pngwio.c => Lowest-level write I/O functions - pngwrite.c => High-level write functions - pngwtran.c => Write data transformations - pngwutil.c => Write utility functions - contrib => Contributions - gregbook => source code for PNG reading and writing, from - Greg Roelofs' "PNG: The Definitive Guide", - O'Reilly, 1999 - msvctest => Builds and runs pngtest using a MSVC workspace - pngminus => Simple pnm2png and png2pnm programs - pngsuite => Test images - visupng => Contains a MSVC workspace for VisualPng - projects => Contains project files and workspaces for building DLL - borland => Contains a Borland workspace for building libpng - and zlib - msvc => Contains a Microsoft Visual C++ (MSVC) workspace - for building libpng and zlib - wince => Contains a Microsoft Visual C++ (Windows CD Toolkit) - workspace for building libpng and zlib on WindowsCE - scripts => Directory containing scripts for building libpng: - descrip.mms => VMS makefile for MMS or MMK - makefile.std => Generic UNIX makefile (cc, creates static libpng.a) - makefile.linux => Linux/ELF makefile - (gcc, creates libpng.so.2.1.0.9) - makefile.gcmmx => Linux/ELF makefile (gcc, creates - libpng.so.2.1.0.9, uses assembler code - tuned for Intel MMX platform) - makefile.gcc => Generic makefile (gcc, creates static libpng.a) - makefile.knr => Archaic UNIX Makefile that converts files with - ansi2knr (Requires ansi2knr.c from - ftp://ftp.cs.wisc.edu/ghost) - makefile.aix => AIX makefile - makefile.cygwin => Cygwin/gcc makefile - makefile.dec => DEC Alpha UNIX makefile - makefile.hpux => HPUX (10.20 and 11.00) makefile - makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static) - makefile.intel => Intel C/C++ version 4.0 and later - libpng.icc => Project file, IBM VisualAge/C++ 4.0 or later - makefile.macosx => MACOS X Makefile - makefile.sgi => Silicon Graphics IRIX (cc, creates static lib) - makefile.sggcc => Silicon Graphics (gcc, creates libpng.so.2.1.0.9) - makefile.sunos => Sun makefile - makefile.solaris => Solaris 2.X makefile - (gcc, creates libpng.so.2.1.0.9) - makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc - makefile.mips => MIPS makefile - makefile.acorn => Acorn makefile - makefile.amiga => Amiga makefile - smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC - compiler (Requires SCOPTIONS, copied from - scripts/SCOPTIONS.ppc) - makefile.atari => Atari makefile - makefile.beos => BEOS makefile for X86 - makefile.bor => Borland makefile (uses bcc) - makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode) - makefile.bd32 => To make a png32bd.dll with Borland C++ 4.5 - makefile.tc3 => Turbo C 3.0 makefile - makefile.dj2 => DJGPP 2 makefile - makefile.msc => Microsoft C makefile - makefile.vcawin32 => makefile for Microsoft Visual C++ 5.0 and - later (uses assembler code tuned for Intel MMX - platform) - makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and - later (does not use assembler code) - makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def) - pngos2.def => OS/2 module definition file used by makefile.os2 - makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model - makevms.com => VMS build script - pngdef.pas => Defines for a png32bd.dll with Borland C++ 4.5 - SCOPTIONS.ppc => Used with smakefile.ppc - -Good luck, and happy coding. - --Glenn Randers-Pehrson - Internet: randeg@alum.rpi.edu - --Andreas Eric Dilger - Internet: adilger@enel.ucalgary.ca - Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/ - --Guy Eric Schalnat - (formerly of Group 42, Inc) - Internet: gschal@infinet.com diff --git a/libraries/libpng-1.0.9/README.rrdtool b/libraries/libpng-1.0.9/README.rrdtool deleted file mode 100644 index fdf4986..0000000 --- a/libraries/libpng-1.0.9/README.rrdtool +++ /dev/null @@ -1,2 +0,0 @@ -This version of libpng has been included with rrdtool. The scripts, projects -and contrib directories have been removed ... get the real thing if you want them. diff --git a/libraries/libpng-1.0.9/TODO b/libraries/libpng-1.0.9/TODO deleted file mode 100644 index a5f6395..0000000 --- a/libraries/libpng-1.0.9/TODO +++ /dev/null @@ -1,24 +0,0 @@ -TODO - list of things to do for libpng: - -Final bug fixes. -Improve API by hiding the png_struct and png_info structs. -Finish work on the no-floating-point version (including gamma compensation) -Better C++ wrapper/full C++ implementation? -Fix problem with C++ and EXTERN "C". -cHRM transformation. -Improve setjmp/longjmp usage or remove it in favor of returning error codes. -Add "grayscale->palette" transformation and "palette->grayscale" detection. -Improved dithering. -Multi-lingual error and warning message support. -Complete sRGB transformation (presently it simply uses gamma=0.45455). -Man pages for function calls. -Better documentation. -Better filter selection - (counting huffman bits/precompression? filter inertia? filter costs?). -Histogram creation. -Text conversion between different code pages (Latin-1 -> Mac and DOS). -Should we always malloc 2^bit_depth PLTE/tRNS/hIST entries for safety? -Build gamma tables using fixed point (and do away with floating point entirely). -Use greater precision when changing to linear gamma for compositing against - background and doing rgb-to-gray transformation. -Investigate pre-incremented loop counters and other loop constructions. diff --git a/libraries/libpng-1.0.9/Y2KINFO b/libraries/libpng-1.0.9/Y2KINFO deleted file mode 100644 index 03da96a..0000000 --- a/libraries/libpng-1.0.9/Y2KINFO +++ /dev/null @@ -1,55 +0,0 @@ - Y2K compliance in libpng: - ========================= - - January 31, 2001 - - Since the PNG Development group is an ad-hoc body, we can't make - an official declaration. - - This is your unofficial assurance that libpng from version 0.71 and - upward through 1.0.9 are Y2K compliant. It is my belief that earlier - versions were also Y2K compliant. - - Libpng only has three year fields. One is a 2-byte unsigned integer - that will hold years up to 65535. The other two hold the date in text - format, and will hold years up to 9999. - - The integer is - "png_uint_16 year" in png_time_struct. - - The strings are - "png_charp time_buffer" in png_struct and - "near_time_buffer", which is a local character string in png.c. - - There are seven time-related functions: - - png_convert_to_rfc_1123() in png.c - (formerly png_convert_to_rfc_1152() in error) - png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c - png_convert_from_time_t() in pngwrite.c - png_get_tIME() in pngget.c - png_handle_tIME() in pngrutil.c, called in pngread.c - png_set_tIME() in pngset.c - png_write_tIME() in pngwutil.c, called in pngwrite.c - - All appear to handle dates properly in a Y2K environment. The - png_convert_from_time_t() function calls gmtime() to convert from system - clock time, which returns (year - 1900), which we properly convert to - the full 4-digit year. There is a possibility that applications using - libpng are not passing 4-digit years into the png_convert_to_rfc_1123() - function, or that they are incorrectly passing only a 2-digit year - instead of "year - 1900" into the png_convert_from_struct_tm() function, - but this is not under our control. The libpng documentation has always - stated that it works with 4-digit years, and the APIs have been - documented as such. - - The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned - integer to hold the year, and can hold years as large as 65535. - - zlib, upon which libpng depends, is also Y2K compliant. It contains - no date-related code. - - - Glenn Randers-Pehrson - libpng maintainer - PNG Development Group diff --git a/libraries/libpng-1.0.9/example.c b/libraries/libpng-1.0.9/example.c deleted file mode 100644 index 1e953c8..0000000 --- a/libraries/libpng-1.0.9/example.c +++ /dev/null @@ -1,776 +0,0 @@ - -#if 0 /* in case someone actually tries to compile this */ - -/* example.c - an example of using libpng */ - -/* This is an example of how to use libpng to read and write PNG files. - * The file libpng.txt is much more verbose then this. If you have not - * read it, do so first. This was designed to be a starting point of an - * implementation. This is not officially part of libpng, is hereby placed - * in the public domain, and therefore does not require a copyright notice. - * - * This file does not currently compile, because it is missing certain - * parts, like allocating memory to hold an image. You will have to - * supply these parts to get it to compile. For an example of a minimal - * working PNG reader/writer, see pngtest.c, included in this distribution; - * see also the programs in the contrib directory. - */ - -#include "png.h" - - /* The png_jmpbuf() macro, used in error handling, became available in - * libpng version 1.0.6. If you want to be able to run your code with older - * versions of libpng, you must define the macro yourself (but only if it - * is not already defined by libpng!). - */ - -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#endif - -/* Check to see if a file is a PNG file using png_sig_cmp(). png_sig_cmp() - * returns zero if the image is a PNG and nonzero if it isn't a PNG. - * - * The function check_if_png() shown here, but not used, returns nonzero (true) - * if the file can be opened and is a PNG, 0 (false) otherwise. - * - * If this call is successful, and you are going to keep the file open, - * you should call png_set_sig_bytes(png_ptr, PNG_BYTES_TO_CHECK); once - * you have created the png_ptr, so that libpng knows your application - * has read that many bytes from the start of the file. Make sure you - * don't call png_set_sig_bytes() with more than 8 bytes read or give it - * an incorrect number of bytes read, or you will either have read too - * many bytes (your fault), or you are telling libpng to read the wrong - * number of magic bytes (also your fault). - * - * Many applications already read the first 2 or 4 bytes from the start - * of the image to determine the file type, so it would be easiest just - * to pass the bytes to png_sig_cmp() or even skip that if you know - * you have a PNG file, and call png_set_sig_bytes(). - */ -#define PNG_BYTES_TO_CHECK 4 -int check_if_png(char *file_name, FILE **fp) -{ - char buf[PNG_BYTES_TO_CHECK]; - - /* Open the prospective PNG file. */ - if ((*fp = fopen(file_name, "rb")) == NULL) - return 0; - - /* Read in some of the signature bytes */ - if (fread(buf, 1, PNG_BYTES_TO_CHECK, *fp) != PNG_BYTES_TO_CHECK) - return 0; - - /* Compare the first PNG_BYTES_TO_CHECK bytes of the signature. - Return nonzero (true) if they match */ - - return(!png_sig_cmp(buf, (png_size_t)0, PNG_BYTES_TO_CHECK)); -} - -/* Read a PNG file. You may want to return an error code if the read - * fails (depending upon the failure). There are two "prototypes" given - * here - one where we are given the filename, and we need to open the - * file, and the other where we are given an open file (possibly with - * some or all of the magic bytes read - see comments above). - */ -#ifdef open_file /* prototype 1 */ -void read_png(char *file_name) /* We need to open the file */ -{ - png_structp png_ptr; - png_infop info_ptr; - unsigned int sig_read = 0; - png_uint_32 width, height; - int bit_depth, color_type, interlace_type; - FILE *fp; - - if ((fp = fopen(file_name, "rb")) == NULL) - return (ERROR); -#else no_open_file /* prototype 2 */ -void read_png(FILE *fp, unsigned int sig_read) /* file is already open */ -{ - png_structp png_ptr; - png_infop info_ptr; - png_uint_32 width, height; - int bit_depth, color_type, interlace_type; -#endif no_open_file /* only use one prototype! */ - - /* Create and initialize the png_struct with the desired error handler - * functions. If you want to use the default stderr and longjump method, - * you can supply NULL for the last three parameters. We also supply the - * the compiler header file version, so that we know if the application - * was compiled with a compatible version of the library. REQUIRED - */ - png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, - png_voidp user_error_ptr, user_error_fn, user_warning_fn); - - if (png_ptr == NULL) - { - fclose(fp); - return (ERROR); - } - - /* Allocate/initialize the memory for image information. REQUIRED. */ - info_ptr = png_create_info_struct(png_ptr); - if (info_ptr == NULL) - { - fclose(fp); - png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL); - return (ERROR); - } - - /* Set error handling if you are using the setjmp/longjmp method (this is - * the normal method of doing things with libpng). REQUIRED unless you - * set up your own error handlers in the png_create_read_struct() earlier. - */ - - if (setjmp(png_jmpbuf(png_ptr))) - { - /* Free all of the memory associated with the png_ptr and info_ptr */ - png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL); - fclose(fp); - /* If we get here, we had a problem reading the file */ - return (ERROR); - } - - /* One of the following I/O initialization methods is REQUIRED */ -#ifdef streams /* PNG file I/O method 1 */ - /* Set up the input control if you are using standard C streams */ - png_init_io(png_ptr, fp); - -#else no_streams /* PNG file I/O method 2 */ - /* If you are using replacement read functions, instead of calling - * png_init_io() here you would call: - */ - png_set_read_fn(png_ptr, (void *)user_io_ptr, user_read_fn); - /* where user_io_ptr is a structure you want available to the callbacks */ -#endif no_streams /* Use only one I/O method! */ - - /* If we have already read some of the signature */ - png_set_sig_bytes(png_ptr, sig_read); - -#ifdef hilevel - /* - * If you have enough memory to read in the entire image at once, - * and you need to specify only transforms that can be controlled - * with one of the PNG_TRANSFORM_* bits (this presently excludes - * dithering, filling, setting background, and doing gamma - * adjustment), then you can read the entire image (including - * pixels) into the info structure with this call: - */ - png_read_png(png_ptr, info_ptr, png_transforms, NULL); -#else - /* OK, you're doing it the hard way, with the lower-level functions */ - - /* The call to png_read_info() gives us all of the information from the - * PNG file before the first IDAT (image data chunk). REQUIRED - */ - png_read_info(png_ptr, info_ptr); - - png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, - &interlace_type, NULL, NULL); - -/**** Set up the data transformations you want. Note that these are all - **** optional. Only call them if you want/need them. Many of the - **** transformations only work on specific types of images, and many - **** are mutually exclusive. - ****/ - - /* tell libpng to strip 16 bit/color files down to 8 bits/color */ - png_set_strip_16(png_ptr); - - /* Strip alpha bytes from the input data without combining with the - * background (not recommended). - */ - png_set_strip_alpha(png_ptr); - - /* Extract multiple pixels with bit depths of 1, 2, and 4 from a single - * byte into separate bytes (useful for paletted and grayscale images). - */ - png_set_packing(png_ptr); - - /* Change the order of packed pixels to least significant bit first - * (not useful if you are using png_set_packing). */ - png_set_packswap(png_ptr); - - /* Expand paletted colors into true RGB triplets */ - if (color_type == PNG_COLOR_TYPE_PALETTE) - png_set_expand(png_ptr); - - /* Expand grayscale images to the full 8 bits from 1, 2, or 4 bits/pixel */ - if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) - png_set_expand(png_ptr); - - /* Expand paletted or RGB images with transparency to full alpha channels - * so the data will be available as RGBA quartets. - */ - if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) - png_set_expand(png_ptr); - - /* Set the background color to draw transparent and alpha images over. - * It is possible to set the red, green, and blue components directly - * for paletted images instead of supplying a palette index. Note that - * even if the PNG file supplies a background, you are not required to - * use it - you should use the (solid) application background if it has one. - */ - - png_color_16 my_background, *image_background; - - if (png_get_bKGD(png_ptr, info_ptr, &image_background)) - png_set_background(png_ptr, image_background, - PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); - else - png_set_background(png_ptr, &my_background, - PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); - - /* Some suggestions as to how to get a screen gamma value */ - - /* Note that screen gamma is the display_exponent, which includes - * the CRT_exponent and any correction for viewing conditions */ - if (/* We have a user-defined screen gamma value */) - { - screen_gamma = user-defined screen_gamma; - } - /* This is one way that applications share the same screen gamma value */ - else if ((gamma_str = getenv("SCREEN_GAMMA")) != NULL) - { - screen_gamma = atof(gamma_str); - } - /* If we don't have another value */ - else - { - screen_gamma = 2.2; /* A good guess for a PC monitors in a dimly - lit room */ - screen_gamma = 1.7 or 1.0; /* A good guess for Mac systems */ - } - - /* Tell libpng to handle the gamma conversion for you. The final call - * is a good guess for PC generated images, but it should be configurable - * by the user at run time by the user. It is strongly suggested that - * your application support gamma correction. - */ - - int intent; - - if (png_get_sRGB(png_ptr, info_ptr, &intent)) - png_set_gamma(png_ptr, screen_gamma, 0.45455); - else - { - double image_gamma; - if (png_get_gAMA(png_ptr, info_ptr, &image_gamma)) - png_set_gamma(png_ptr, screen_gamma, image_gamma); - else - png_set_gamma(png_ptr, screen_gamma, 0.45455); - } - - /* Dither RGB files down to 8 bit palette or reduce palettes - * to the number of colors available on your screen. - */ - if (color_type & PNG_COLOR_MASK_COLOR) - { - int num_palette; - png_colorp palette; - - /* This reduces the image to the application supplied palette */ - if (/* we have our own palette */) - { - /* An array of colors to which the image should be dithered */ - png_color std_color_cube[MAX_SCREEN_COLORS]; - - png_set_dither(png_ptr, std_color_cube, MAX_SCREEN_COLORS, - MAX_SCREEN_COLORS, NULL, 0); - } - /* This reduces the image to the palette supplied in the file */ - else if (png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette)) - { - png_uint_16p histogram; - - png_get_hIST(png_ptr, info_ptr, &histogram); - - png_set_dither(png_ptr, palette, num_palette, - max_screen_colors, histogram, 0); - } - } - - /* invert monochrome files to have 0 as white and 1 as black */ - png_set_invert_mono(png_ptr); - - /* If you want to shift the pixel values from the range [0,255] or - * [0,65535] to the original [0,7] or [0,31], or whatever range the - * colors were originally in: - */ - if (png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT)) - { - png_color_8p sig_bit; - - png_get_sBIT(png_ptr, info_ptr, &sig_bit); - png_set_shift(png_ptr, sig_bit); - } - - /* flip the RGB pixels to BGR (or RGBA to BGRA) */ - if (color_type & PNG_COLOR_MASK_COLOR) - png_set_bgr(png_ptr); - - /* swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */ - png_set_swap_alpha(png_ptr); - - /* swap bytes of 16 bit files to least significant byte first */ - png_set_swap(png_ptr); - - /* Add filler (or alpha) byte (before/after each RGB triplet) */ - png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER); - - /* Turn on interlace handling. REQUIRED if you are not using - * png_read_image(). To see how to handle interlacing passes, - * see the png_read_row() method below: - */ - number_passes = png_set_interlace_handling(png_ptr); - - /* Optional call to gamma correct and add the background to the palette - * and update info structure. REQUIRED if you are expecting libpng to - * update the palette for you (ie you selected such a transform above). - */ - png_read_update_info(png_ptr, info_ptr); - - /* Allocate the memory to hold the image using the fields of info_ptr. */ - - /* The easiest way to read the image: */ - png_bytep row_pointers[height]; - - for (row = 0; row < height; row++) - { - row_pointers[row] = malloc(png_get_rowbytes(png_ptr, info_ptr)); - } - - /* Now it's time to read the image. One of these methods is REQUIRED */ -#ifdef entire /* Read the entire image in one go */ - png_read_image(png_ptr, row_pointers); - -#else no_entire /* Read the image one or more scanlines at a time */ - /* The other way to read images - deal with interlacing: */ - - for (pass = 0; pass < number_passes; pass++) - { -#ifdef single /* Read the image a single row at a time */ - for (y = 0; y < height; y++) - { - png_read_rows(png_ptr, &row_pointers[y], NULL, 1); - } - -#else no_single /* Read the image several rows at a time */ - for (y = 0; y < height; y += number_of_rows) - { -#ifdef sparkle /* Read the image using the "sparkle" effect. */ - png_read_rows(png_ptr, &row_pointers[y], NULL, number_of_rows); - - png_read_rows(png_ptr, NULL, row_pointers[y], number_of_rows); -#else no_sparkle /* Read the image using the "rectangle" effect */ - png_read_rows(png_ptr, NULL, &row_pointers[y], number_of_rows); -#endif no_sparkle /* use only one of these two methods */ - } - - /* if you want to display the image after every pass, do - so here */ -#endif no_single /* use only one of these two methods */ - } -#endif no_entire /* use only one of these two methods */ - - /* read rest of file, and get additional chunks in info_ptr - REQUIRED */ - png_read_end(png_ptr, info_ptr); -#endif hilevel - - /* At this point you have read the entire image */ - - /* clean up after the read, and free any memory allocated - REQUIRED */ - png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL); - - /* close the file */ - fclose(fp); - - /* that's it */ - return (OK); -} - -/* progressively read a file */ - -int -initialize_png_reader(png_structp *png_ptr, png_infop *info_ptr) -{ - /* Create and initialize the png_struct with the desired error handler - * functions. If you want to use the default stderr and longjump method, - * you can supply NULL for the last three parameters. We also check that - * the library version is compatible in case we are using dynamically - * linked libraries. - */ - *png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, - png_voidp user_error_ptr, user_error_fn, user_warning_fn); - - if (*png_ptr == NULL) - { - *info_ptr = NULL; - return (ERROR); - } - - *info_ptr = png_create_info_struct(png_ptr); - - if (*info_ptr == NULL) - { - png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL); - return (ERROR); - } - - if (setjmp(png_jmpbuf((*png_ptr)))) - { - png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL); - return (ERROR); - } - - /* This one's new. You will need to provide all three - * function callbacks, even if you aren't using them all. - * If you aren't using all functions, you can specify NULL - * parameters. Even when all three functions are NULL, - * you need to call png_set_progressive_read_fn(). - * These functions shouldn't be dependent on global or - * static variables if you are decoding several images - * simultaneously. You should store stream specific data - * in a separate struct, given as the second parameter, - * and retrieve the pointer from inside the callbacks using - * the function png_get_progressive_ptr(png_ptr). - */ - png_set_progressive_read_fn(*png_ptr, (void *)stream_data, - info_callback, row_callback, end_callback); - - return (OK); -} - -int -process_data(png_structp *png_ptr, png_infop *info_ptr, - png_bytep buffer, png_uint_32 length) -{ - if (setjmp(png_jmpbuf((*png_ptr)))) - { - /* Free the png_ptr and info_ptr memory on error */ - png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL); - return (ERROR); - } - - /* This one's new also. Simply give it chunks of data as - * they arrive from the data stream (in order, of course). - * On Segmented machines, don't give it any more than 64K. - * The library seems to run fine with sizes of 4K, although - * you can give it much less if necessary (I assume you can - * give it chunks of 1 byte, but I haven't tried with less - * than 256 bytes yet). When this function returns, you may - * want to display any rows that were generated in the row - * callback, if you aren't already displaying them there. - */ - png_process_data(*png_ptr, *info_ptr, buffer, length); - return (OK); -} - -info_callback(png_structp png_ptr, png_infop info) -{ -/* do any setup here, including setting any of the transformations - * mentioned in the Reading PNG files section. For now, you _must_ - * call either png_start_read_image() or png_read_update_info() - * after all the transformations are set (even if you don't set - * any). You may start getting rows before png_process_data() - * returns, so this is your last chance to prepare for that. - */ -} - -row_callback(png_structp png_ptr, png_bytep new_row, - png_uint_32 row_num, int pass) -{ -/* this function is called for every row in the image. If the - * image is interlacing, and you turned on the interlace handler, - * this function will be called for every row in every pass. - * Some of these rows will not be changed from the previous pass. - * When the row is not changed, the new_row variable will be NULL. - * The rows and passes are called in order, so you don't really - * need the row_num and pass, but I'm supplying them because it - * may make your life easier. - * - * For the non-NULL rows of interlaced images, you must call - * png_progressive_combine_row() passing in the row and the - * old row. You can call this function for NULL rows (it will - * just return) and for non-interlaced images (it just does the - * memcpy for you) if it will make the code easier. Thus, you - * can just do this for all cases: - */ - - png_progressive_combine_row(png_ptr, old_row, new_row); - -/* where old_row is what was displayed for previous rows. Note - * that the first pass (pass == 0 really) will completely cover - * the old row, so the rows do not have to be initialized. After - * the first pass (and only for interlaced images), you will have - * to pass the current row, and the function will combine the - * old row and the new row. - */ -} - -end_callback(png_structp png_ptr, png_infop info) -{ -/* this function is called when the whole image has been read, - * including any chunks after the image (up to and including - * the IEND). You will usually have the same info chunk as you - * had in the header, although some data may have been added - * to the comments and time fields. - * - * Most people won't do much here, perhaps setting a flag that - * marks the image as finished. - */ -} - -/* write a png file */ -void write_png(char *file_name /* , ... other image information ... */) -{ - FILE *fp; - png_structp png_ptr; - png_infop info_ptr; - png_colorp palette; - - /* open the file */ - fp = fopen(file_name, "wb"); - if (fp == NULL) - return (ERROR); - - /* Create and initialize the png_struct with the desired error handler - * functions. If you want to use the default stderr and longjump method, - * you can supply NULL for the last three parameters. We also check that - * the library version is compatible with the one used at compile time, - * in case we are using dynamically linked libraries. REQUIRED. - */ - png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, - png_voidp user_error_ptr, user_error_fn, user_warning_fn); - - if (png_ptr == NULL) - { - fclose(fp); - return (ERROR); - } - - /* Allocate/initialize the image information data. REQUIRED */ - info_ptr = png_create_info_struct(png_ptr); - if (info_ptr == NULL) - { - fclose(fp); - png_destroy_write_struct(&png_ptr, (png_infopp)NULL); - return (ERROR); - } - - /* Set error handling. REQUIRED if you aren't supplying your own - * error handling functions in the png_create_write_struct() call. - */ - if (setjmp(png_jmpbuf(png_ptr))) - { - /* If we get here, we had a problem reading the file */ - fclose(fp); - png_destroy_write_struct(&png_ptr, &info_ptr); - return (ERROR); - } - - /* One of the following I/O initialization functions is REQUIRED */ -#ifdef streams /* I/O initialization method 1 */ - /* set up the output control if you are using standard C streams */ - png_init_io(png_ptr, fp); -#else no_streams /* I/O initialization method 2 */ - /* If you are using replacement read functions, instead of calling - * png_init_io() here you would call */ - png_set_write_fn(png_ptr, (void *)user_io_ptr, user_write_fn, - user_IO_flush_function); - /* where user_io_ptr is a structure you want available to the callbacks */ -#endif no_streams /* only use one initialization method */ - -#ifdef hilevel - /* This is the easy way. Use it if you already have all the - * image info living info in the structure. You could "|" many - * PNG_TRANSFORM flags into the png_transforms integer here. - */ - png_write_png(png_ptr, info_ptr, png_transforms, NULL); -#else - /* This is the hard way */ - - /* Set the image information here. Width and height are up to 2^31, - * bit_depth is one of 1, 2, 4, 8, or 16, but valid values also depend on - * the color_type selected. color_type is one of PNG_COLOR_TYPE_GRAY, - * PNG_COLOR_TYPE_GRAY_ALPHA, PNG_COLOR_TYPE_PALETTE, PNG_COLOR_TYPE_RGB, - * or PNG_COLOR_TYPE_RGB_ALPHA. interlace is either PNG_INTERLACE_NONE or - * PNG_INTERLACE_ADAM7, and the compression_type and filter_type MUST - * currently be PNG_COMPRESSION_TYPE_BASE and PNG_FILTER_TYPE_BASE. REQUIRED - */ - png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, PNG_COLOR_TYPE_???, - PNG_INTERLACE_????, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - /* set the palette if there is one. REQUIRED for indexed-color images */ - palette = (png_colorp)png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH * sizeof (png_color)); - /* ... set palette colors ... */ - png_set_PLTE(png_ptr, info_ptr, palette, PNG_MAX_PALETTE_LENGTH); - /* You must not free palette here, because png_set_PLTE only makes a link to - the palette that you malloced. Wait until you are about to destroy - the png structure. */ - - /* optional significant bit chunk */ - /* if we are dealing with a grayscale image then */ - sig_bit.gray = true_bit_depth; - /* otherwise, if we are dealing with a color image then */ - sig_bit.red = true_red_bit_depth; - sig_bit.green = true_green_bit_depth; - sig_bit.blue = true_blue_bit_depth; - /* if the image has an alpha channel then */ - sig_bit.alpha = true_alpha_bit_depth; - png_set_sBIT(png_ptr, info_ptr, sig_bit); - - - /* Optional gamma chunk is strongly suggested if you have any guess - * as to the correct gamma of the image. - */ - png_set_gAMA(png_ptr, info_ptr, gamma); - - /* Optionally write comments into the image */ - text_ptr[0].key = "Title"; - text_ptr[0].text = "Mona Lisa"; - text_ptr[0].compression = PNG_TEXT_COMPRESSION_NONE; - text_ptr[1].key = "Author"; - text_ptr[1].text = "Leonardo DaVinci"; - text_ptr[1].compression = PNG_TEXT_COMPRESSION_NONE; - text_ptr[2].key = "Description"; - text_ptr[2].text = ""; - text_ptr[2].compression = PNG_TEXT_COMPRESSION_zTXt; -#ifdef PNG_iTXt_SUPPORTED - text_ptr[0].lang = NULL; - text_ptr[1].lang = NULL; - text_ptr[2].lang = NULL; -#endif - png_set_text(png_ptr, info_ptr, text_ptr, 3); - - /* other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs, */ - /* note that if sRGB is present the gAMA and cHRM chunks must be ignored - * on read and must be written in accordance with the sRGB profile */ - - /* Write the file header information. REQUIRED */ - png_write_info(png_ptr, info_ptr); - - /* If you want, you can write the info in two steps, in case you need to - * write your private chunk ahead of PLTE: - * - * png_write_info_before_PLTE(write_ptr, write_info_ptr); - * write_my_chunk(); - * png_write_info(png_ptr, info_ptr); - * - * However, given the level of known- and unknown-chunk support in 1.1.0 - * and up, this should no longer be necessary. - */ - - /* Once we write out the header, the compression type on the text - * chunks gets changed to PNG_TEXT_COMPRESSION_NONE_WR or - * PNG_TEXT_COMPRESSION_zTXt_WR, so it doesn't get written out again - * at the end. - */ - - /* set up the transformations you want. Note that these are - * all optional. Only call them if you want them. - */ - - /* invert monochrome pixels */ - png_set_invert_mono(png_ptr); - - /* Shift the pixels up to a legal bit depth and fill in - * as appropriate to correctly scale the image. - */ - png_set_shift(png_ptr, &sig_bit); - - /* pack pixels into bytes */ - png_set_packing(png_ptr); - - /* swap location of alpha bytes from ARGB to RGBA */ - png_set_swap_alpha(png_ptr); - - /* Get rid of filler (OR ALPHA) bytes, pack XRGB/RGBX/ARGB/RGBA into - * RGB (4 channels -> 3 channels). The second parameter is not used. - */ - png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); - - /* flip BGR pixels to RGB */ - png_set_bgr(png_ptr); - - /* swap bytes of 16-bit files to most significant byte first */ - png_set_swap(png_ptr); - - /* swap bits of 1, 2, 4 bit packed pixel formats */ - png_set_packswap(png_ptr); - - /* turn on interlace handling if you are not using png_write_image() */ - if (interlacing) - number_passes = png_set_interlace_handling(png_ptr); - else - number_passes = 1; - - /* The easiest way to write the image (you may have a different memory - * layout, however, so choose what fits your needs best). You need to - * use the first method if you aren't handling interlacing yourself. - */ - png_uint_32 k, height, width; - png_byte image[height][width*bytes_per_pixel]; - png_bytep row_pointers[height]; - for (k = 0; k < height; k++) - row_pointers[k] = image + k*width*bytes_per_pixel; - - /* One of the following output methods is REQUIRED */ -#ifdef entire /* write out the entire image data in one call */ - png_write_image(png_ptr, row_pointers); - - /* the other way to write the image - deal with interlacing */ - -#else no_entire /* write out the image data by one or more scanlines */ - /* The number of passes is either 1 for non-interlaced images, - * or 7 for interlaced images. - */ - for (pass = 0; pass < number_passes; pass++) - { - /* Write a few rows at a time. */ - png_write_rows(png_ptr, &row_pointers[first_row], number_of_rows); - - /* If you are only writing one row at a time, this works */ - for (y = 0; y < height; y++) - { - png_write_rows(png_ptr, &row_pointers[y], 1); - } - } -#endif no_entire /* use only one output method */ - - /* You can write optional chunks like tEXt, zTXt, and tIME at the end - * as well. Shouldn't be necessary in 1.1.0 and up as all the public - * chunks are supported and you can use png_set_unknown_chunks() to - * register unknown chunks into the info structure to be written out. - */ - - /* It is REQUIRED to call this to finish writing the rest of the file */ - png_write_end(png_ptr, info_ptr); -#endif hilevel - - /* If you png_malloced a palette, free it here (don't free info_ptr->palette, - as recommended in versions 1.0.5m and earlier of this example; if - libpng mallocs info_ptr->palette, libpng will free it). If you - allocated it with malloc() instead of png_malloc(), use free() instead - of png_free(). */ - png_free(png_ptr, palette); - palette=NULL; - - /* Similarly, if you png_malloced any data that you passed in with - png_set_something(), such as a hist or trans array, free it here, - when you can be sure that libpng is through with it. */ - png_free(png_ptr, trans); - trans=NULL; - - /* clean up after the write, and free any memory allocated */ - png_destroy_write_struct(&png_ptr, &info_ptr); - - /* close the file */ - fclose(fp); - - /* that's it */ - return (OK); -} - -#endif /* if 0 */ diff --git a/libraries/libpng-1.0.9/libpng.3 b/libraries/libpng-1.0.9/libpng.3 deleted file mode 100644 index ee45043..0000000 --- a/libraries/libpng-1.0.9/libpng.3 +++ /dev/null @@ -1,3690 +0,0 @@ -.TH LIBPNG 3 "January 31, 2001" -.SH NAME -libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9 -.SH SYNOPSIS -\fI\fB - -\fB#include \fP - -\fI\fB - -\fBpng_uint_32 png_access_version_number \fI(void\fP\fB);\fP - -\fI\fB - -\fBint png_check_sig (png_bytep \fP\fIsig\fP\fB, int \fInum\fP\fB);\fP - -\fI\fB - -\fBvoid png_chunk_error (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fIerror\fP\fB);\fP - -\fI\fB - -\fBvoid png_chunk_warning (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fImessage\fP\fB);\fP - -\fI\fB - -\fBvoid png_convert_from_struct_tm (png_timep \fP\fIptime\fP\fB, struct tm FAR * \fIttime\fP\fB);\fP - -\fI\fB - -\fBvoid png_convert_from_time_t (png_timep \fP\fIptime\fP\fB, time_t \fIttime\fP\fB);\fP - -\fI\fB - -\fBpng_charp png_convert_to_rfc1123 (png_structp \fP\fIpng_ptr\fP\fB, png_timep \fIptime\fP\fB);\fP - -\fI\fB - -\fBpng_infop png_create_info_struct (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_structp png_create_read_struct (png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fIwarn_fn\fP\fB);\fP - -\fI\fB - -\fBpng_structp png_create_read_struct_2(png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP - -\fI\fB - -\fBpng_structp png_create_write_struct (png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fIwarn_fn\fP\fB);\fP - -\fI\fB - -\fBpng_structp png_create_write_struct_2(png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP - -\fI\fB - -\fBint png_debug(int \fP\fIlevel\fP\fB, png_const_charp \fImessage\fP\fB);\fP - -\fI\fB - -\fBint png_debug1(int \fP\fIlevel\fP\fB, png_const_charp \fP\fImessage\fP\fB, \fIp1\fP\fB);\fP - -\fI\fB - -\fBint png_debug2(int \fP\fIlevel\fP\fB, png_const_charp \fP\fImessage\fP\fB, \fP\fIp1\fP\fB, \fIp2\fP\fB);\fP - -\fI\fB - -\fBvoid png_destroy_info_struct (png_structp \fP\fIpng_ptr\fP\fB, png_infopp \fIinfo_ptr_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_destroy_read_struct (png_structpp \fP\fIpng_ptr_ptr\fP\fB, png_infopp \fP\fIinfo_ptr_ptr\fP\fB, png_infopp \fIend_info_ptr_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_destroy_write_struct (png_structpp \fP\fIpng_ptr_ptr\fP\fB, png_infopp \fIinfo_ptr_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_error (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fIerror\fP\fB);\fP - -\fI\fB - -\fBvoid png_free (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fIptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_free_chunk_list (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_free_default(png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fIptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_free_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fInum\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_bit_depth (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_16p \fI*background\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_channels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fI*white_x\fP\fB, double \fP\fI*white_y\fP\fB, double \fP\fI*red_x\fP\fB, double \fP\fI*red_y\fP\fB, double \fP\fI*green_x\fP\fB, double \fP\fI*green_y\fP\fB, double \fP\fI*blue_x\fP\fB, double \fI*blue_y\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*white_x\fP\fB, png_uint_32 \fP\fI*white_y\fP\fB, png_uint_32 \fP\fI*red_x\fP\fB, png_uint_32 \fP\fI*red_y\fP\fB, png_uint_32 \fP\fI*green_x\fP\fB, png_uint_32 \fP\fI*green_y\fP\fB, png_uint_32 \fP\fI*blue_x\fP\fB, png_uint_32 \fI*blue_y\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_color_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_compression_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_copyright (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_get_error_ptr (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_filter_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fI*file_gamma\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fI*int_file_gamma\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_header_ver (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_header_version (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fI*hist\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charpp \fP\fIname\fP\fB, int \fP\fI*compression_type\fP\fB, png_charpp \fP\fIprofile\fP\fB, png_uint_32 \fI*proflen\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*width\fP\fB, png_uint_32 \fP\fI*height\fP\fB, int \fP\fI*bit_depth\fP\fB, int \fP\fI*color_type\fP\fB, int \fP\fI*interlace_type\fP\fB, int \fP\fI*compression_type\fP\fB, int \fI*filter_type\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_image_height (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_image_width (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_interlace_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_get_io_ptr (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_libpng_ver (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_get_mem_ptr(png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*offset_x\fP\fB, png_uint_32 \fP\fI*offset_y\fP\fB, int \fI*unit_type\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fI*purpose\fP\fB, png_int_32 \fP\fI*X0\fP\fB, png_int_32 \fP\fI*X1\fP\fB, int \fP\fI*type\fP\fB, int \fP\fI*nparams\fP\fB, png_charp \fP\fI*units\fP\fB, png_charpp \fI*params\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*res_x\fP\fB, png_uint_32 \fP\fI*res_y\fP\fB, int \fI*unit_type\fP\fB);\fP - -\fI\fB - -\fBfloat png_get_pixel_aspect_ratio (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_get_progressive_ptr (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_colorp \fP\fI*palette\fP\fB, int \fI*num_palette\fP\fB);\fP - -\fI\fB - -\fBpng_byte png_get_rgb_to_gray_status (png_structp \fIpng_ptr) - -\fBpng_uint_32 png_get_rowbytes (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_bytepp png_get_rows (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fI*sig_bit\fP\fB);\fP - -\fI\fB - -\fBpng_bytep png_get_signature (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fI*splt_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fI*intent\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_text (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fI*text_ptr\fP\fB, int \fI*num_text\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fI*mod_time\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fI*trans\fP\fB, int \fP\fI*num_trans\fP\fB, png_color_16p \fI*trans_values\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkpp \fIunknowns\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_get_user_chunk_ptr (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_get_user_transform_ptr (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_valid (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIflag\fP\fB);\fP - -\fI\fB - -\fBpng_int_32 png_get_x_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_int_32 png_get_x_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_x_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_int_32 png_get_y_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_int_32 png_get_y_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_y_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_compression_buffer_size (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_info_init (png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_init_io (png_structp \fP\fIpng_ptr\fP\fB, FILE \fI*fp\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_malloc (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_malloc_default(png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP - -\fI\fB - -\fBvoidp png_memcpy (png_voidp \fP\fIs1\fP\fB, png_voidp \fP\fIs2\fP\fB, png_size_t \fIsize\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_memcpy_check (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIs1\fP\fB, png_voidp \fP\fIs2\fP\fB, png_uint_32 \fIsize\fP\fB);\fP - -\fI\fB - -\fBvoidp png_memset (png_voidp \fP\fIs1\fP\fB, int \fP\fIvalue\fP\fB, png_size_t \fIsize\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_memset_check (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIs1\fP\fB, int \fP\fIvalue\fP\fB, png_uint_32 \fIsize\fP\fB);\fP - -\fI\fB - -\fBvoid png_permit_empty_plte (png_structp \fP\fIpng_ptr\fP\fB, int \fIempty_plte_permitted\fP\fB);\fP - -\fI\fB - -\fBvoid png_process_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_size\fP\fB);\fP - -\fI\fB - -\fBvoid png_progressive_combine_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIold_row\fP\fB, png_bytep \fInew_row\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_destroy (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_infop \fIend_info_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_image (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fIimage\fP\fB);\fP - -\fI\fB - -\fBDEPRECATED: void png_read_init (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBDEPRECATED: void png_read_init_2 (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP - -\fBvoid png_read_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_png (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fItransforms\fP\fB, png_voidp \fIparams\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fIdisplay_row\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_rows (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fP\fIrow\fP\fB, png_bytepp \fP\fIdisplay_row\fP\fB, png_uint_32 \fInum_rows\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_update_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_background (png_structp \fP\fIpng_ptr\fP\fB, png_color_16p \fP\fIbackground_color\fP\fB, int \fP\fIbackground_gamma_code\fP\fB, int \fP\fIneed_expand\fP\fB, double \fIbackground_gamma\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_bgr (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_16p \fIbackground\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fIwhite_x\fP\fB, double \fP\fIwhite_y\fP\fB, double \fP\fIred_x\fP\fB, double \fP\fIred_y\fP\fB, double \fP\fIgreen_x\fP\fB, double \fP\fIgreen_y\fP\fB, double \fP\fIblue_x\fP\fB, double \fIblue_y\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIwhite_x\fP\fB, png_uint_32 \fP\fIwhite_y\fP\fB, png_uint_32 \fP\fIred_x\fP\fB, png_uint_32 \fP\fIred_y\fP\fB, png_uint_32 \fP\fIgreen_x\fP\fB, png_uint_32 \fP\fIgreen_y\fP\fB, png_uint_32 \fP\fIblue_x\fP\fB, png_uint_32 \fIblue_y\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_compression_level (png_structp \fP\fIpng_ptr\fP\fB, int \fIlevel\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_compression_mem_level (png_structp \fP\fIpng_ptr\fP\fB, int \fImem_level\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_compression_method (png_structp \fP\fIpng_ptr\fP\fB, int \fImethod\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_compression_strategy (png_structp \fP\fIpng_ptr\fP\fB, int \fIstrategy\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_compression_window_bits (png_structp \fP\fIpng_ptr\fP\fB, int \fIwindow_bits\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_crc_action (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcrit_action\fP\fB, int \fIancil_action\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_dither (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fP\fInum_palette\fP\fB, int \fP\fImaximum_colors\fP\fB, png_uint_16p \fP\fIhistogram\fP\fB, int \fIfull_dither\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_error_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fIwarning_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_expand (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_filler (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, int \fIflags\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_filter (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fImethod\fP\fB, int \fIfilters\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_filter_heuristics (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIheuristic_method\fP\fB, int \fP\fInum_weights\fP\fB, png_doublep \fP\fIfilter_weights\fP\fB, png_doublep \fIfilter_costs\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_flush (png_structp \fP\fIpng_ptr\fP\fB, int \fInrows\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_gamma (png_structp \fP\fIpng_ptr\fP\fB, double \fP\fIscreen_gamma\fP\fB, double \fIdefault_file_gamma\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fIfile_gamma\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIfile_gamma\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_gray_1_2_4_to_8(png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_gray_to_rgb (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fIhist\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_charp \fP\fIprofile\fP\fB, png_uint_32 \fIproflen\fP\fB);\fP - -\fI\fB - -\fBint png_set_interlace_handling (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_invalid (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fImask\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_invert_alpha (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_invert_mono (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIinterlace_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fIfilter_type\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_keep_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIkeep\fP\fB, png_bytep \fP\fIchunk_list\fP\fB, int \fInum_chunks\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_mem_fn(png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIoffset_x\fP\fB, png_uint_32 \fP\fIoffset_y\fP\fB, int \fIunit_type\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_packing (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_packswap (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_palette_to_rgb(png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIpurpose\fP\fB, png_int_32 \fP\fIX0\fP\fB, png_int_32 \fP\fIX1\fP\fB, int \fP\fItype\fP\fB, int \fP\fInparams\fP\fB, png_charp \fP\fIunits\fP\fB, png_charpp \fIparams\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIres_x\fP\fB, png_uint_32 \fP\fIres_y\fP\fB, int \fIunit_type\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_progressive_read_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIprogressive_ptr\fP\fB, png_progressive_info_ptr \fP\fIinfo_fn\fP\fB, png_progressive_row_ptr \fP\fIrow_fn\fP\fB, png_progressive_end_ptr \fIend_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fInum_palette\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_read_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIio_ptr\fP\fB, png_rw_ptr \fIread_data_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_read_status_fn (png_structp \fP\fIpng_ptr\fP\fB, png_read_status_ptr \fIread_row_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_read_user_transform_fn (png_structp \fP\fIpng_ptr\fP\fB, png_user_transform_ptr \fIread_user_transform_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_rgb_to_gray (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIerror_action\fP\fB, double \fP\fIred\fP\fB, double \fIgreen\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_rgb_to_gray_fixed (png_structp \fP\fIpng_ptr\fP\fB, int error_action png_fixed_point \fP\fIred\fP\fB, png_fixed_point \fIgreen\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_rows (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytepp \fIrow_pointers\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fIsig_bit\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, double \fP\fIwidth\fP\fB, double \fIheight\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_shift (png_structp \fP\fIpng_ptr\fP\fB, png_color_8p \fItrue_bits\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_sig_bytes (png_structp \fP\fIpng_ptr\fP\fB, int \fInum_bytes\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fP\fIsplt_ptr\fP\fB, int \fInum_spalettes\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIintent\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_sRGB_gAMA_and_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIintent\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_strip_16 (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_strip_alpha (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_swap (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_swap_alpha (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_text (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fItext_ptr\fP\fB, int \fInum_text\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fItrans\fP\fB, int \fP\fInum_trans\fP\fB, png_color_16p \fItrans_values\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_tRNS_to_alpha(png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_set_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkp \fP\fIunknowns\fP\fB, int \fP\fInum\fP\fB, int \fIlocation\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_unknown_chunk_location(png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fIchunk\fP\fB, int \fIlocation\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_read_user_chunk_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIuser_chunk_ptr\fP\fB, png_user_chunk_ptr \fIread_user_chunk_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_user_transform_info (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIuser_transform_ptr\fP\fB, int \fP\fIuser_transform_depth\fP\fB, int \fIuser_transform_channels\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_write_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIio_ptr\fP\fB, png_rw_ptr \fP\fIwrite_data_fn\fP\fB, png_flush_ptr \fIoutput_flush_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_write_status_fn (png_structp \fP\fIpng_ptr\fP\fB, png_write_status_ptr \fIwrite_row_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_write_user_transform_fn (png_structp \fP\fIpng_ptr\fP\fB, png_user_transform_ptr \fIwrite_user_transform_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_set_compression_buffer_size(png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP - -\fI\fB - -\fBint png_sig_cmp (png_bytep \fP\fIsig\fP\fB, png_size_t \fP\fIstart\fP\fB, png_size_t \fInum_to_check\fP\fB);\fP - -\fI\fB - -\fBvoid png_start_read_image (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_warning (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fImessage\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_chunk (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIchunk_name\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_chunk_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_chunk_end (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_chunk_start (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIchunk_name\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_destroy (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_destroy_info (png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_flush (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_image (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fIimage\fP\fB);\fP - -\fI\fB - -\fBDEPRECATED: void png_write_init (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBDEPRECATED: void png_write_init_2 (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_info_before_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_png (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fItransforms\fP\fB, png_voidp \fIparams\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_rows (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fP\fIrow\fP\fB, png_uint_32 \fInum_rows\fP\fB);\fP - -\fI\fB - -.SH DESCRIPTION -The -.I libpng -library supports encoding, decoding, and various manipulations of -the Portable Network Graphics (PNG) format image files. It uses the -.IR zlib(3) -compression library. -Following is a copy of the libpng.txt file that accompanies libpng. -.SH LIBPNG.TXT -libpng.txt - A description on how to use and modify libpng - - libpng version 1.0.9 - January 31, 2001 - Updated and distributed by Glenn Randers-Pehrson - - Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson - For conditions of distribution and use, see copyright - notice in png.h. - - based on: - - libpng 1.0 beta 6 version 0.96 May 28, 1997 - Updated and distributed by Andreas Dilger - Copyright (c) 1996, 1997 Andreas Dilger - - libpng 1.0 beta 2 - version 0.88 January 26, 1996 - For conditions of distribution and use, see copyright - notice in png.h. Copyright (c) 1995, 1996 Guy Eric - Schalnat, Group 42, Inc. - - Updated/rewritten per request in the libpng FAQ - Copyright (c) 1995, 1996 Frank J. T. Wojcik - December 18, 1995 & January 20, 1996 - -.SH I. Introduction - -This file describes how to use and modify the PNG reference library -(known as libpng) for your own use. There are five sections to this -file: introduction, structures, reading, writing, and modification and -configuration notes for various special platforms. In addition to this -file, example.c is a good starting point for using the library, as -it is heavily commented and should include everything most people -will need. We assume that libpng is already installed; see the -INSTALL file for instructions on how to install libpng. - -Libpng was written as a companion to the PNG specification, as a way -of reducing the amount of time and effort it takes to support the PNG -file format in application programs. - -The PNG-1.2 specification is available at -and at . - -The PNG-1.0 specification is available -as RFC 2083 and as a -W3C Recommendation . Some -additional chunks are described in the special-purpose public chunks -documents at . - -Other information -about PNG, and the latest version of libpng, can be found at the PNG home -page, -and at . - -Most users will not have to modify the library significantly; advanced -users may want to modify it more. All attempts were made to make it as -complete as possible, while keeping the code easy to understand. -Currently, this library only supports C. Support for other languages -is being considered. - -Libpng has been designed to handle multiple sessions at one time, -to be easily modifiable, to be portable to the vast majority of -machines (ANSI, K&R, 16-, 32-, and 64-bit) available, and to be easy -to use. The ultimate goal of libpng is to promote the acceptance of -the PNG file format in whatever way possible. While there is still -work to be done (see the TODO file), libpng should cover the -majority of the needs of its users. - -Libpng uses zlib for its compression and decompression of PNG files. -Further information about zlib, and the latest version of zlib, can -be found at the zlib home page, . -The zlib compression utility is a general purpose utility that is -useful for more than PNG files, and can be used without libpng. -See the documentation delivered with zlib for more details. -You can usually find the source files for the zlib utility wherever you -find the libpng source files. - -Libpng is thread safe, provided the threads are using different -instances of the structures. Each thread should have its own -png_struct and png_info instances, and thus its own image. -Libpng does not protect itself against two threads using the -same instance of a structure. - - -.SH II. Structures - -There are two main structures that are important to libpng, png_struct -and png_info. The first, png_struct, is an internal structure that -will not, for the most part, be used by a user except as the first -variable passed to every libpng function call. - -The png_info structure is designed to provide information about the -PNG file. At one time, the fields of png_info were intended to be -directly accessible to the user. However, this tended to cause problems -with applications using dynamically loaded libraries, and as a result -a set of interface functions for png_info (the png_get_*() and png_set_*() -functions) was developed. The fields of png_info are still available for -older applications, but it is suggested that applications use the new -interfaces if at all possible. - -Applications that do make direct access to the members of png_struct (except -for png_ptr->jmpbuf) must be recompiled whenever the library is updated, -and applications that make direct access to the members of png_info must -be recompiled if they were compiled or loaded with libpng version 1.0.6, -in which the members were in a different order. In version 1.0.7, the -members of the png_info structure reverted to the old order, as they were -in versions 0.97c through 1.0.5. Starting with version 2.0.0, both -structures are going to be hidden, and the contents of the structures will -only be accessible through the png_get/png_set functions. - -The png.h header file is an invaluable reference for programming with libpng. -And while I'm on the topic, make sure you include the libpng header file: - -#include - -.SH III. Reading - -We'll now walk you through the possible functions to call when reading -in a PNG file sequentially, briefly explaining the syntax and purpose -of each one. See example.c and png.h for more detail. While -progressive reading is covered in the next section, you will still -need some of the functions discussed in this section to read a PNG -file. - -.SS Setup - -You will want to do the I/O initialization(*) before you get into libpng, -so if it doesn't work, you don't have much to undo. Of course, you -will also want to insure that you are, in fact, dealing with a PNG -file. Libpng provides a simple check to see if a file is a PNG file. -To use it, pass in the first 1 to 8 bytes of the file to the function -png_sig_cmp(), and it will return 0 if the bytes match the corresponding -bytes of the PNG signature, or nonzero otherwise. Of course, the more bytes -you pass in, the greater the accuracy of the prediction. - -If you are intending to keep the file pointer open for use in libpng, -you must ensure you don't read more than 8 bytes from the beginning -of the file, and you also have to make a call to png_set_sig_bytes_read() -with the number of bytes you read from the beginning. Libpng will -then only check the bytes (if any) that your program didn't read. - -(*): If you are not using the standard I/O functions, you will need -to replace them with custom functions. See the discussion under -Customizing libpng. - - - FILE *fp = fopen(file_name, "rb"); - if (!fp) - { - return (ERROR); - } - fread(header, 1, number, fp); - is_png = !png_sig_cmp(header, 0, number); - if (!is_png) - { - return (NOT_PNG); - } - - -Next, png_struct and png_info need to be allocated and initialized. In -order to ensure that the size of these structures is correct even with a -dynamically linked libpng, there are functions to initialize and -allocate the structures. We also pass the library version, optional -pointers to error handling functions, and a pointer to a data struct for -use by the error functions, if necessary (the pointer and functions can -be NULL if the default error handlers are to be used). See the section -on Changes to Libpng below regarding the old initialization functions. -The structure allocation functions quietly return NULL if they fail to -create the structure, so your application should check for that. - - png_structp png_ptr = png_create_read_struct - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn); - if (!png_ptr) - return (ERROR); - - png_infop info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) - { - png_destroy_read_struct(&png_ptr, - (png_infopp)NULL, (png_infopp)NULL); - return (ERROR); - } - - png_infop end_info = png_create_info_struct(png_ptr); - if (!end_info) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); - } - -If you want to use your own memory allocation routines, -define PNG_USER_MEM_SUPPORTED and use -png_create_read_struct_2() instead of png_create_read_struct(): - - png_structp png_ptr = png_create_read_struct_2 - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn, (png_voidp) - user_mem_ptr, user_malloc_fn, user_free_fn); - -The error handling routines passed to png_create_read_struct() -and the memory alloc/free routines passed to png_create_struct_2() -are only necessary if you are not using the libpng supplied error -handling and memory alloc/free functions. - -When libpng encounters an error, it expects to longjmp back -to your routine. Therefore, you will need to call setjmp and pass -your png_jmpbuf(png_ptr). If you read the file from different -routines, you will need to update the jmpbuf field every time you enter -a new routine that will call a png_*() function. - -See your documentation of setjmp/longjmp for your compiler for more -information on setjmp/longjmp. See the discussion on libpng error -handling in the Customizing Libpng section below for more information -on the libpng error handling. If an error occurs, and libpng longjmp's -back to your setjmp, you will want to call png_destroy_read_struct() to -free any memory. - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - &end_info); - fclose(fp); - return (ERROR); - } - -If you would rather avoid the complexity of setjmp/longjmp issues, -you can compile libpng with PNG_SETJMP_NOT_SUPPORTED, in which case -errors will result in a call to PNG_ABORT() which defaults to abort(). - -Now you need to set up the input code. The default for libpng is to -use the C function fread(). If you use this, you will need to pass a -valid FILE * in the function png_init_io(). Be sure that the file is -opened in binary mode. If you wish to handle reading data in another -way, you need not call the png_init_io() function, but you must then -implement the libpng I/O methods discussed in the Customizing Libpng -section below. - - png_init_io(png_ptr, fp); - -If you had previously opened the file and read any of the signature from -the beginning in order to see if this was a PNG file, you need to let -libpng know that there are some bytes missing from the start of the file. - - png_set_sig_bytes(png_ptr, number); - -.SS Setting up callback code - -You can set up a callback function to handle any unknown chunks in the -input stream. You must supply the function - - read_chunk_callback(png_ptr ptr, - png_unknown_chunkp chunk); - { - /* The unknown chunk structure contains your - chunk data: */ - png_byte name[5]; - png_byte *data; - png_size_t size; - /* Note that libpng has already taken care of the - CRC handling */ - - /* put your code here. Return one of the following: */ - - return (-n); /* chunk had an error */ - return (0); /* did not recognize */ - return (n); /* success */ - } - -(You can give your function another name that you like instead of -"read_chunk_callback") - -To inform libpng about your function, use - - png_set_read_user_chunk_fn(png_ptr, user_chunk_ptr, - read_chunk_callback); - -This names not only the callback function, but also a user pointer that -you can retrieve with - - png_get_user_chunk_ptr(png_ptr); - -At this point, you can set up a callback function that will be -called after each row has been read, which you can use to control -a progress meter or the like. It's demonstrated in pngtest.c. -You must supply a function - - void read_row_callback(png_ptr ptr, png_uint_32 row, int pass); - { - /* put your code here */ - } - -(You can give it another name that you like instead of "read_row_callback") - -To inform libpng about your function, use - - png_set_read_status_fn(png_ptr, read_row_callback); - -.SS Unknown-chunk handling - -Now you get to set the way the library processes unknown chunks in the -input PNG stream. Both known and unknown chunks will be read. Normal -behavior is that known chunks will be parsed into information in -various info_ptr members; unknown chunks will be discarded. To change -this, you can call: - - png_set_keep_unknown_chunks(png_ptr, info_ptr, keep, - chunk_list, num_chunks); - keep - 0: do not keep - 1: keep only if safe-to-copy - 2: keep even if unsafe-to-copy - chunk_list - list of chunks affected (a byte string, - five bytes per chunk, NULL or '\0' if - num_chunks is 0) - num_chunks - number of chunks affected; if 0, all - unknown chunks are affected - -Unknown chunks declared in this way will be saved as raw data onto a -list of png_unknown_chunk structures. If a chunk that is normally -known to libpng is named in the list, it will be handled as unknown, -according to the "keep" directive. If a chunk is named in successive -instances of png_set_keep_unknown_chunks(), the final instance will -take precedence. - -.SS The high-level read interface - -At this point there are two ways to proceed; through the high-level -read interface, or through a sequence of low-level read operations. -You can use the high-level interface if (a) you are willing to read -the entire image into memory, and (b) the input transformations -you want to do are limited to the following set: - - PNG_TRANSFORM_IDENTITY No transformation - PNG_TRANSFORM_STRIP_16 Strip 16-bit samples to 8 bits - PNG_TRANSFORM_STRIP_ALPHA Discard the alpha channel - PNG_TRANSFORM_PACKING Expand 1, 2 and 4-bit samples to bytes - PNG_TRANSFORM_PACKSWAP Change order of packed pixels to LSB first - PNG_TRANSFORM_EXPAND Perform set_expand() - PNG_TRANSFORM_INVERT_MONO Invert monochrome images - PNG_TRANSFORM_SHIFT Normalize pixels to the sBIT depth - PNG_TRANSFORM_BGR Flip RGB to BGR, RGBA to BGRA - PNG_TRANSFORM_SWAP_ALPHA Flip RGBA to ARGB or GA to AG - PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity to transparency - PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples - -(This excludes setting a background color, doing gamma transformation, -dithering, and setting filler.) If this is the case, simply do this: - - png_read_png(png_ptr, info_ptr, png_transforms, NULL) - -where png_transforms is an integer containing the logical OR of -some set of transformation flags. This call is equivalent to png_read_info(), -followed the set of transformations indicated by the transform mask, -then png_read_image(), and finally png_read_end(). - -(The final parameter of this call is not yet used. Someday it might point -to transformation parameters required by some future input transform.) - -After you have called png_read_png(), you can retrieve the image data -with - - row_pointers = png_get_rows(png_ptr, info_ptr); - -where row_pointers is an array of pointers to the pixel data for each row: - - png_bytep row_pointers[height]; - -If you know your image size and pixel size ahead of time, you can allocate -row_pointers prior to calling png_read_png() with - - row_pointers = png_malloc(png_ptr, height*sizeof(png_bytep)); - for (int i=0; i) and -png_get_(png_ptr, info_ptr, ...) functions return non-zero if the -data has been read, or zero if it is missing. The parameters to the -png_get_ are set directly if they are simple data types, or a pointer -into the info_ptr is returned for any complex types. - - png_get_PLTE(png_ptr, info_ptr, &palette, - &num_palette); - palette - the palette for the file - (array of png_color) - num_palette - number of entries in the palette - - png_get_gAMA(png_ptr, info_ptr, &gamma); - gamma - the gamma the file is written - at (PNG_INFO_gAMA) - - png_get_sRGB(png_ptr, info_ptr, &srgb_intent); - srgb_intent - the rendering intent (PNG_INFO_sRGB) - The presence of the sRGB chunk - means that the pixel data is in the - sRGB color space. This chunk also - implies specific values of gAMA and - cHRM. - - png_get_iCCP(png_ptr, info_ptr, &name, &compression_type, - &profile, &proflen); - name - The profile name. - compression - The compression type; always PNG_COMPRESSION_TYPE_BASE - for PNG 1.0. You may give NULL to this argument - to ignore it. - profile - International Color Consortium color profile - data. May contain NULs. - proflen - length of profile data in bytes. - - png_get_sBIT(png_ptr, info_ptr, &sig_bit); - sig_bit - the number of significant bits for - (PNG_INFO_sBIT) each of the gray, - red, green, and blue channels, - whichever are appropriate for the - given color type (png_color_16) - - png_get_tRNS(png_ptr, info_ptr, &trans, &num_trans, - &trans_values); - trans - array of transparent entries for - palette (PNG_INFO_tRNS) - trans_values - graylevel or color sample values of - the single transparent color for - non-paletted images (PNG_INFO_tRNS) - num_trans - number of transparent entries - (PNG_INFO_tRNS) - - png_get_hIST(png_ptr, info_ptr, &hist); - (PNG_INFO_hIST) - hist - histogram of palette (array of - png_uint_16) - - png_get_tIME(png_ptr, info_ptr, &mod_time); - mod_time - time image was last modified - (PNG_VALID_tIME) - - png_get_bKGD(png_ptr, info_ptr, &background); - background - background color (PNG_VALID_bKGD) - valid 16-bit red, green and blue - values, regardless of color_type - - num_comments = png_get_text(png_ptr, info_ptr, - &text_ptr, &num_text); - num_comments - number of comments - text_ptr - array of png_text holding image - comments - text_ptr[i].compression - type of compression used - on "text" PNG_TEXT_COMPRESSION_NONE - PNG_TEXT_COMPRESSION_zTXt - PNG_ITXT_COMPRESSION_NONE - PNG_ITXT_COMPRESSION_zTXt - text_ptr[i].key - keyword for comment. Must contain - 1-79 characters. - text_ptr[i].text - text comments for current - keyword. Can be empty. - text_ptr[i].text_length - length of text string, - after decompression, 0 for iTXt - text_ptr[i].itxt_length - length of itxt string, - after decompression, 0 for tEXt/zTXt - text_ptr[i].lang - language of comment (empty - string for unknown). - text_ptr[i].translated_keyword - keyword in UTF-8 - (empty string for unknown). - num_text - number of comments (same as num_comments; - you can put NULL here to avoid the duplication) - Note while png_set_text() will accept text, language, and - translated keywords that can be NULL pointers, the structure - returned by png_get_text will always contain regular - zero-terminated C strings. They might be empty strings but - they will never be NULL pointers. - - num_spalettes = png_get_sPLT(png_ptr, info_ptr, &palette_ptr); - palette_ptr - array of palette structures holding - contents of one or more sPLT chunks read. - num_spalettes - number of sPLT chunks read. - - png_get_oFFs(png_ptr, info_ptr, &offset_x, &offset_y, - &unit_type); - offset_x - positive offset from the left edge - of the screen - offset_y - positive offset from the top edge - of the screen - unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER - - png_get_pHYs(png_ptr, info_ptr, &res_x, &res_y, - &unit_type); - res_x - pixels/unit physical resolution in - x direction - res_y - pixels/unit physical resolution in - x direction - unit_type - PNG_RESOLUTION_UNKNOWN, - PNG_RESOLUTION_METER - - png_get_sCAL(png_ptr, info_ptr, &unit, &width, &height) - unit - physical scale units (an integer) - width - width of a pixel in physical scale units - height - height of a pixel in physical scale units - (width and height are doubles) - - png_get_sCAL_s(png_ptr, info_ptr, &unit, &width, &height) - unit - physical scale units (an integer) - width - width of a pixel in physical scale units - height - height of a pixel in physical scale units - (width and height are strings like "2.54") - - num_unknown_chunks = png_get_unknown_chunks(png_ptr, info_ptr, - &unknowns) - unknowns - array of png_unknown_chunk structures holding - unknown chunks - unknowns[i].name - name of unknown chunk - unknowns[i].data - data of unknown chunk - unknowns[i].size - size of unknown chunk's data - unknowns[i].location - position of chunk in file - - The value of "i" corresponds to the order in which the chunks were read - from the PNG file or inserted with the png_set_unknown_chunks() function. - -The data from the pHYs chunk can be retrieved in several convenient -forms: - - res_x = png_get_x_pixels_per_meter(png_ptr, - info_ptr) - res_y = png_get_y_pixels_per_meter(png_ptr, - info_ptr) - res_x_and_y = png_get_pixels_per_meter(png_ptr, - info_ptr) - res_x = png_get_x_pixels_per_inch(png_ptr, - info_ptr) - res_y = png_get_y_pixels_per_inch(png_ptr, - info_ptr) - res_x_and_y = png_get_pixels_per_inch(png_ptr, - info_ptr) - aspect_ratio = png_get_pixel_aspect_ratio(png_ptr, - info_ptr) - - (Each of these returns 0 [signifying "unknown"] if - the data is not present or if res_x is 0; - res_x_and_y is 0 if res_x != res_y) - -The data from the oFFs chunk can be retrieved in several convenient -forms: - - x_offset = png_get_x_offset_microns(png_ptr, info_ptr); - y_offset = png_get_y_offset_microns(png_ptr, info_ptr); - x_offset = png_get_x_offset_inches(png_ptr, info_ptr); - y_offset = png_get_y_offset_inches(png_ptr, info_ptr); - - (Each of these returns 0 [signifying "unknown" if both - x and y are 0] if the data is not present or if the chunk - is present but the unit is the pixel) - -For more information, see the png_info definition in png.h and the -PNG specification for chunk contents. Be careful with trusting -rowbytes, as some of the transformations could increase the space -needed to hold a row (expand, filler, gray_to_rgb, etc.). -See png_read_update_info(), below. - -A quick word about text_ptr and num_text. PNG stores comments in -keyword/text pairs, one pair per chunk, with no limit on the number -of text chunks, and a 2^31 byte limit on their size. While there are -suggested keywords, there is no requirement to restrict the use to these -strings. It is strongly suggested that keywords and text be sensible -to humans (that's the point), so don't use abbreviations. Non-printing -symbols are not allowed. See the PNG specification for more details. -There is also no requirement to have text after the keyword. - -Keywords should be limited to 79 Latin-1 characters without leading or -trailing spaces, but non-consecutive spaces are allowed within the -keyword. It is possible to have the same keyword any number of times. -The text_ptr is an array of png_text structures, each holding a -pointer to a language string, a pointer to a keyword and a pointer to -a text string. The text string, language code, and translated -keyword may be empty or NULL pointers. The keyword/text -pairs are put into the array in the order that they are received. -However, some or all of the text chunks may be after the image, so, to -make sure you have read all the text chunks, don't mess with these -until after you read the stuff after the image. This will be -mentioned again below in the discussion that goes with png_read_end(). - -.SS Input transformations - -After you've read the header information, you can set up the library -to handle any special transformations of the image data. The various -ways to transform the data will be described in the order that they -should occur. This is important, as some of these change the color -type and/or bit depth of the data, and some others only work on -certain color types and bit depths. Even though each transformation -checks to see if it has data that it can do something with, you should -make sure to only enable a transformation if it will be valid for the -data. For example, don't swap red and blue on grayscale data. - -The colors used for the background and transparency values should be -supplied in the same format/depth as the current image data. They -are stored in the same format/depth as the image data in a bKGD or tRNS -chunk, so this is what libpng expects for this data. The colors are -transformed to keep in sync with the image data when an application -calls the png_read_update_info() routine (see below). - -Data will be decoded into the supplied row buffers packed into bytes -unless the library has been told to transform it into another format. -For example, 4 bit/pixel paletted or grayscale data will be returned -2 pixels/byte with the leftmost pixel in the high-order bits of the -byte, unless png_set_packing() is called. 8-bit RGB data will be stored -in RGB RGB RGB format unless png_set_filler() is called to insert filler -bytes, either before or after each RGB triplet. 16-bit RGB data will -be returned RRGGBB RRGGBB, with the most significant byte of the color -value first, unless png_set_strip_16() is called to transform it to -regular RGB RGB triplets, or png_set_filler() is called to insert -filler bytes, either before or after each RRGGBB triplet. Similarly, -8-bit or 16-bit grayscale data can be modified with png_set_filler() -or png_set_strip_16(). - -The following code transforms grayscale images of less than 8 to 8 bits, -changes paletted images to RGB, and adds a full alpha channel if there is -transparency information in a tRNS chunk. This is most useful on -grayscale images with bit depths of 2 or 4 or if there is a multiple-image -viewing application that wishes to treat all images in the same way. - - if (color_type == PNG_COLOR_TYPE_PALETTE) - png_set_palette_to_rgb(png_ptr); - - if (color_type == PNG_COLOR_TYPE_GRAY && - bit_depth < 8) png_set_gray_1_2_4_to_8(png_ptr); - - if (png_get_valid(png_ptr, info_ptr, - PNG_INFO_tRNS)) png_set_tRNS_to_alpha(png_ptr); - -These three functions are actually aliases for png_set_expand(), added -in libpng version 1.0.4, with the function names expanded to improve code -readability. In some future version they may actually do different -things. - -PNG can have files with 16 bits per channel. If you only can handle -8 bits per channel, this will strip the pixels down to 8 bit. - - if (bit_depth == 16) - png_set_strip_16(png_ptr); - -If, for some reason, you don't need the alpha channel on an image, -and you want to remove it rather than combining it with the background -(but the image author certainly had in mind that you *would* combine -it with the background, so that's what you should probably do): - - if (color_type & PNG_COLOR_MASK_ALPHA) - png_set_strip_alpha(png_ptr); - -In PNG files, the alpha channel in an image -is the level of opacity. If you need the alpha channel in an image to -be the level of transparency instead of opacity, you can invert the -alpha channel (or the tRNS chunk data) after it's read, so that 0 is -fully opaque and 255 (in 8-bit or paletted images) or 65535 (in 16-bit -images) is fully transparent, with - - png_set_invert_alpha(png_ptr); - -PNG files pack pixels of bit depths 1, 2, and 4 into bytes as small as -they can, resulting in, for example, 8 pixels per byte for 1 bit -files. This code expands to 1 pixel per byte without changing the -values of the pixels: - - if (bit_depth < 8) - png_set_packing(png_ptr); - -PNG files have possible bit depths of 1, 2, 4, 8, and 16. All pixels -stored in a PNG image have been "scaled" or "shifted" up to the next -higher possible bit depth (e.g. from 5 bits/sample in the range [0,31] to -8 bits/sample in the range [0, 255]). However, it is also possible to -convert the PNG pixel data back to the original bit depth of the image. -This call reduces the pixels back down to the original bit depth: - - png_color_16p sig_bit; - - if (png_get_sBIT(png_ptr, info_ptr, &sig_bit)) - png_set_shift(png_ptr, sig_bit); - -PNG files store 3-color pixels in red, green, blue order. This code -changes the storage of the pixels to blue, green, red: - - if (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_bgr(png_ptr); - -PNG files store RGB pixels packed into 3 bytes. This code expands them -into 4 bytes for windowing systems that need them in this format: - - if (bit_depth == 8 && color_type == - PNG_COLOR_TYPE_RGB) png_set_filler(png_ptr, - filler, PNG_FILLER_BEFORE); - -where "filler" is the 8 or 16-bit number to fill with, and the location is -either PNG_FILLER_BEFORE or PNG_FILLER_AFTER, depending upon whether -you want the filler before the RGB or after. This transformation -does not affect images that already have full alpha channels. - -If you are reading an image with an alpha channel, and you need the -data as ARGB instead of the normal PNG format RGBA: - - if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_swap_alpha(png_ptr); - -For some uses, you may want a grayscale image to be represented as -RGB. This code will do that conversion: - - if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb(png_ptr); - -Conversely, you can convert an RGB or RGBA image to grayscale or grayscale -with alpha. - - if (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_rgb_to_gray_fixed(png_ptr, error_action, - int red_weight, int green_weight); - - error_action = 1: silently do the conversion - error_action = 2: issue a warning if the original - image has any pixel where - red != green or red != blue - error_action = 3: issue an error and abort the - conversion if the original - image has any pixel where - red != green or red != blue - - red_weight: weight of red component times 100000 - green_weight: weight of green component times 100000 - If either weight is negative, default - weights (21268, 71514) are used. - -If you have set error_action = 1 or 2, you can -later check whether the image really was gray, after processing -the image rows, with the png_get_rgb_to_gray_status(png_ptr) function. -It will return a png_byte that is zero if the image was gray or -1 if there were any non-gray pixels. bKGD and sBIT data -will be silently converted to grayscale, using the green channel -data, regardless of the error_action setting. - -With red_weight+green_weight<=100000, -the normalized graylevel is computed: - - int rw = red_weight * 65536; - int gw = green_weight * 65536; - int bw = 65536 - (rw + gw); - gray = (rw*red + gw*green + bw*blue)/65536; - -The default values approximate those recommended in the Charles -Poynton's Color FAQ, -Copyright (c) 1998-01-04 Charles Poynton poynton@inforamp.net - - Y = 0.212671 * R + 0.715160 * G + 0.072169 * B - -Libpng approximates this with - - Y = 0.21268 * R + 0.7151 * G + 0.07217 * B - -which can be expressed with integers as - - Y = (6969 * R + 23434 * G + 2365 * B)/32768 - -The calculation is done in a linear colorspace, if the image gamma -is known. - -If you have a grayscale and you are using png_set_expand_depth() or -png_set_expand() to change to -a higher bit-depth, you must either supply the background color as a gray -value at the original file bit-depth (need_expand = 1) or else supply the -background color as an RGB triplet at the final, expanded bit depth -(need_expand = 0). Similarly, if you are reading a paletted image, you -must either supply the background color as a palette index (need_expand = 1) -or as an RGB triplet that may or may not be in the palette (need_expand = 0). - - png_color_16 my_background; - png_color_16p image_background; - - if (png_get_bKGD(png_ptr, info_ptr, &image_background)) - png_set_background(png_ptr, image_background, - PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); - else - png_set_background(png_ptr, &my_background, - PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); - -The png_set_background() function tells libpng to composite images -with alpha or simple transparency against the supplied background -color. If the PNG file contains a bKGD chunk (PNG_INFO_bKGD valid), -you may use this color, or supply another color more suitable for -the current display (e.g., the background color from a web page). You -need to tell libpng whether the color is in the gamma space of the -display (PNG_BACKGROUND_GAMMA_SCREEN for colors you supply), the file -(PNG_BACKGROUND_GAMMA_FILE for colors from the bKGD chunk), or one -that is neither of these gammas (PNG_BACKGROUND_GAMMA_UNIQUE - I don't -know why anyone would use this, but it's here). - -To properly display PNG images on any kind of system, the application needs -to know what the display gamma is. Ideally, the user will know this, and -the application will allow them to set it. One method of allowing the user -to set the display gamma separately for each system is to check for a -SCREEN_GAMMA or DISPLAY_GAMMA environment variable, which will hopefully be -correctly set. - -Note that display_gamma is the overall gamma correction required to produce -pleasing results, which depends on the lighting conditions in the surrounding -environment. In a dim or brightly lit room, no compensation other than -the physical gamma exponent of the monitor is needed, while in a dark room -a slightly smaller exponent is better. - - double gamma, screen_gamma; - - if (/* We have a user-defined screen - gamma value */) - { - screen_gamma = user_defined_screen_gamma; - } - /* One way that applications can share the same - screen gamma value */ - else if ((gamma_str = getenv("SCREEN_GAMMA")) - != NULL) - { - screen_gamma = (double)atof(gamma_str); - } - /* If we don't have another value */ - else - { - screen_gamma = 2.2; /* A good guess for a - PC monitor in a bright office or a dim room */ - screen_gamma = 2.0; /* A good guess for a - PC monitor in a dark room */ - screen_gamma = 1.7 or 1.0; /* A good - guess for Mac systems */ - } - -The png_set_gamma() function handles gamma transformations of the data. -Pass both the file gamma and the current screen_gamma. If the file does -not have a gamma value, you can pass one anyway if you have an idea what -it is (usually 0.45455 is a good guess for GIF images on PCs). Note -that file gammas are inverted from screen gammas. See the discussions -on gamma in the PNG specification for an excellent description of what -gamma is, and why all applications should support it. It is strongly -recommended that PNG viewers support gamma correction. - - if (png_get_gAMA(png_ptr, info_ptr, &gamma)) - png_set_gamma(png_ptr, screen_gamma, gamma); - else - png_set_gamma(png_ptr, screen_gamma, 0.45455); - -If you need to reduce an RGB file to a paletted file, or if a paletted -file has more entries then will fit on your screen, png_set_dither() -will do that. Note that this is a simple match dither that merely -finds the closest color available. This should work fairly well with -optimized palettes, and fairly badly with linear color cubes. If you -pass a palette that is larger then maximum_colors, the file will -reduce the number of colors in the palette so it will fit into -maximum_colors. If there is a histogram, it will use it to make -more intelligent choices when reducing the palette. If there is no -histogram, it may not do as good a job. - - if (color_type & PNG_COLOR_MASK_COLOR) - { - if (png_get_valid(png_ptr, info_ptr, - PNG_INFO_PLTE)) - { - png_uint_16p histogram; - - png_get_hIST(png_ptr, info_ptr, - &histogram); - png_set_dither(png_ptr, palette, num_palette, - max_screen_colors, histogram, 1); - } - else - { - png_color std_color_cube[MAX_SCREEN_COLORS] = - { ... colors ... }; - - png_set_dither(png_ptr, std_color_cube, - MAX_SCREEN_COLORS, MAX_SCREEN_COLORS, - NULL,0); - } - } - -PNG files describe monochrome as black being zero and white being one. -The following code will reverse this (make black be one and white be -zero): - - if (bit_depth == 1 && color_type == PNG_COLOR_GRAY) - png_set_invert_mono(png_ptr); - -PNG files store 16 bit pixels in network byte order (big-endian, -ie. most significant bits first). This code changes the storage to the -other way (little-endian, i.e. least significant bits first, the -way PCs store them): - - if (bit_depth == 16) - png_set_swap(png_ptr); - -If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you -need to change the order the pixels are packed into bytes, you can use: - - if (bit_depth < 8) - png_set_packswap(png_ptr); - -Finally, you can write your own transformation function if none of -the existing ones meets your needs. This is done by setting a callback -with - - png_set_read_user_transform_fn(png_ptr, - read_transform_fn); - -You must supply the function - - void read_transform_fn(png_ptr ptr, row_info_ptr - row_info, png_bytep data) - -See pngtest.c for a working example. Your function will be called -after all of the other transformations have been processed. - -You can also set up a pointer to a user structure for use by your -callback function, and you can inform libpng that your transform -function will change the number of channels or bit depth with the -function - - png_set_user_transform_info(png_ptr, user_ptr, - user_depth, user_channels); - -The user's application, not libpng, is responsible for allocating and -freeing any memory required for the user structure. - -You can retrieve the pointer via the function -png_get_user_transform_ptr(). For example: - - voidp read_user_transform_ptr = - png_get_user_transform_ptr(png_ptr); - -The last thing to handle is interlacing; this is covered in detail below, -but you must call the function here if you want libpng to handle expansion -of the interlaced image. - - number_of_passes = png_set_interlace_handling(png_ptr); - -After setting the transformations, libpng can update your png_info -structure to reflect any transformations you've requested with this -call. This is most useful to update the info structure's rowbytes -field so you can use it to allocate your image memory. This function -will also update your palette with the correct screen_gamma and -background if these have been given with the calls above. - - png_read_update_info(png_ptr, info_ptr); - -After you call png_read_update_info(), you can allocate any -memory you need to hold the image. The row data is simply -raw byte data for all forms of images. As the actual allocation -varies among applications, no example will be given. If you -are allocating one large chunk, you will need to build an -array of pointers to each row, as it will be needed for some -of the functions below. - -.SS Reading image data - -After you've allocated memory, you can read the image data. -The simplest way to do this is in one function call. If you are -allocating enough memory to hold the whole image, you can just -call png_read_image() and libpng will read in all the image data -and put it in the memory area supplied. You will need to pass in -an array of pointers to each row. - -This function automatically handles interlacing, so you don't need -to call png_set_interlace_handling() or call this function multiple -times, or any of that other stuff necessary with png_read_rows(). - - png_read_image(png_ptr, row_pointers); - -where row_pointers is: - - png_bytep row_pointers[height]; - -You can point to void or char or whatever you use for pixels. - -If you don't want to read in the whole image at once, you can -use png_read_rows() instead. If there is no interlacing (check -interlace_type == PNG_INTERLACE_NONE), this is simple: - - png_read_rows(png_ptr, row_pointers, NULL, - number_of_rows); - -where row_pointers is the same as in the png_read_image() call. - -If you are doing this just one row at a time, you can do this with -a single row_pointer instead of an array of row_pointers: - - png_bytep row_pointer = row; - png_read_row(png_ptr, row_pointer, NULL); - -If the file is interlaced (interlace_type != 0 in the IHDR chunk), things -get somewhat harder. The only current (PNG Specification version 1.2) -interlacing type for PNG is (interlace_type == PNG_INTERLACE_ADAM7) -is a somewhat complicated 2D interlace scheme, known as Adam7, that -breaks down an image into seven smaller images of varying size, based -on an 8x8 grid. - -libpng can fill out those images or it can give them to you "as is". -If you want them filled out, there are two ways to do that. The one -mentioned in the PNG specification is to expand each pixel to cover -those pixels that have not been read yet (the "rectangle" method). -This results in a blocky image for the first pass, which gradually -smooths out as more pixels are read. The other method is the "sparkle" -method, where pixels are drawn only in their final locations, with the -rest of the image remaining whatever colors they were initialized to -before the start of the read. The first method usually looks better, -but tends to be slower, as there are more pixels to put in the rows. - -If you don't want libpng to handle the interlacing details, just call -png_read_rows() seven times to read in all seven images. Each of the -images is a valid image by itself, or they can all be combined on an -8x8 grid to form a single image (although if you intend to combine them -you would be far better off using the libpng interlace handling). - -The first pass will return an image 1/8 as wide as the entire image -(every 8th column starting in column 0) and 1/8 as high as the original -(every 8th row starting in row 0), the second will be 1/8 as wide -(starting in column 4) and 1/8 as high (also starting in row 0). The -third pass will be 1/4 as wide (every 4th pixel starting in column 0) and -1/8 as high (every 8th row starting in row 4), and the fourth pass will -be 1/4 as wide and 1/4 as high (every 4th column starting in column 2, -and every 4th row starting in row 0). The fifth pass will return an -image 1/2 as wide, and 1/4 as high (starting at column 0 and row 2), -while the sixth pass will be 1/2 as wide and 1/2 as high as the original -(starting in column 1 and row 0). The seventh and final pass will be as -wide as the original, and 1/2 as high, containing all of the odd -numbered scanlines. Phew! - -If you want libpng to expand the images, call this before calling -png_start_read_image() or png_read_update_info(): - - if (interlace_type == PNG_INTERLACE_ADAM7) - number_of_passes - = png_set_interlace_handling(png_ptr); - -This will return the number of passes needed. Currently, this -is seven, but may change if another interlace type is added. -This function can be called even if the file is not interlaced, -where it will return one pass. - -If you are not going to display the image after each pass, but are -going to wait until the entire image is read in, use the sparkle -effect. This effect is faster and the end result of either method -is exactly the same. If you are planning on displaying the image -after each pass, the "rectangle" effect is generally considered the -better looking one. - -If you only want the "sparkle" effect, just call png_read_rows() as -normal, with the third parameter NULL. Make sure you make pass over -the image number_of_passes times, and you don't change the data in the -rows between calls. You can change the locations of the data, just -not the data. Each pass only writes the pixels appropriate for that -pass, and assumes the data from previous passes is still valid. - - png_read_rows(png_ptr, row_pointers, NULL, - number_of_rows); - -If you only want the first effect (the rectangles), do the same as -before except pass the row buffer in the third parameter, and leave -the second parameter NULL. - - png_read_rows(png_ptr, NULL, row_pointers, - number_of_rows); - -.SS Finishing a sequential read - -After you are finished reading the image through either the high- or -low-level interfaces, you can finish reading the file. If you are -interested in comments or time, which may be stored either before or -after the image data, you should pass the separate png_info struct if -you want to keep the comments from before and after the image -separate. If you are not interested, you can pass NULL. - - png_read_end(png_ptr, end_info); - -When you are done, you can free all memory allocated by libpng like this: - - png_destroy_read_struct(&png_ptr, &info_ptr, - &end_info); - -It is also possible to individually free the info_ptr members that -point to libpng-allocated storage with the following function: - - png_free_data(png_ptr, info_ptr, mask, n) - mask - identifies data to be freed, a mask - containing the logical OR of one or - more of - PNG_FREE_PLTE, PNG_FREE_TRNS, - PNG_FREE_HIST, PNG_FREE_ICCP, - PNG_FREE_PCAL, PNG_FREE_ROWS, - PNG_FREE_SCAL, PNG_FREE_SPLT, - PNG_FREE_TEXT, PNG_FREE_UNKN, - or simply PNG_FREE_ALL - n - sequence number of item to be freed - (-1 for all items) - -This function may be safely called when the relevant storage has -already been freed, or has not yet been allocated, or was allocated -by the user and not by libpng, and will in those -cases do nothing. The "n" parameter is ignored if only one item -of the selected data type, such as PLTE, is allowed. If "n" is not --1, and multiple items are allowed for the data type identified in -the mask, such as text or sPLT, only the n'th item is freed. - -The default behavior is only to free data that was allocated internally -by libpng. This can be changed, so that libpng will not free the data, -or so that it will free data that was allocated by the user with png_malloc() -or png_zalloc() and passed in via a png_set_*() function, with - - png_data_freer(png_ptr, info_ptr, freer, mask) - mask - which data elements are affected - same choices as in png_free_data() - freer - one of - PNG_DESTROY_WILL_FREE_DATA - PNG_SET_WILL_FREE_DATA - PNG_USER_WILL_FREE_DATA - -This function only affects data that has already been allocated. -You can call this function after reading the PNG data but before calling -any png_set_*() functions, to control whether the user or the png_set_*() -function is responsible for freeing any existing data that might be present, -and again after the png_set_*() functions to control whether the user -or png_destroy_*() is supposed to free the data. When the user assumes -responsibility for libpng-allocated data, the application must use -png_free() to free it, and when the user transfers responsibility to libpng -for data that the user has allocated, the user must have used png_malloc() -or png_zalloc() to allocate it (the png_zalloc() function is the same -as png_malloc() except that it also zeroes the newly-allocated memory). - -If you allocated your row_pointers in a single block, as suggested above in -the description of the high level read interface, you must not transfer -responsibility for freeing it to the png_set_rows or png_read_destroy function, -because they would also try to free the individual row_pointers[i]. - -If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword -separately, do not transfer responsibility for freeing text_ptr to libpng, -because when libpng fills a png_text structure it combines these members with -the key member, and png_free_data() will free only text_ptr.key. Similarly, -if you transfer responsibility for free'ing text_ptr from libpng to your -application, your application must not separately free those members. - -The png_free_data() function will turn off the "valid" flag for anything -it frees. If you need to turn the flag off for a chunk that was freed by your -application instead of by libpng, you can use - - png_set_invalid(png_ptr, info_ptr, mask); - mask - identifies the chunks to be made invalid, - containing the logical OR of one or - more of - PNG_INFO_gAMA, PNG_INFO_sBIT, - PNG_INFO_cHRM, PNG_INFO_PLTE, - PNG_INFO_tRNS, PNG_INFO_bKGD, - PNG_INFO_hIST, PNG_INFO_pHYs, - PNG_INFO_oFFs, PNG_INFO_tIME, - PNG_INFO_pCAL, PNG_INFO_sRGB, - PNG_INFO_iCCP, PNG_INFO_sPLT, - PNG_INFO_sCAL, PNG_INFO_IDAT - -For a more compact example of reading a PNG image, see the file example.c. - -.SS Reading PNG files progressively - -The progressive reader is slightly different then the non-progressive -reader. Instead of calling png_read_info(), png_read_rows(), and -png_read_end(), you make one call to png_process_data(), which calls -callbacks when it has the info, a row, or the end of the image. You -set up these callbacks with png_set_progressive_read_fn(). You don't -have to worry about the input/output functions of libpng, as you are -giving the library the data directly in png_process_data(). I will -assume that you have read the section on reading PNG files above, -so I will only highlight the differences (although I will show -all of the code). - -png_structp png_ptr; -png_infop info_ptr; - - /* An example code fragment of how you would - initialize the progressive reader in your - application. */ - int - initialize_png_reader() - { - png_ptr = png_create_read_struct - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn); - if (!png_ptr) - return (ERROR); - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) - { - png_destroy_read_struct(&png_ptr, (png_infopp)NULL, - (png_infopp)NULL); - return (ERROR); - } - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); - } - - /* This one's new. You can provide functions - to be called when the header info is valid, - when each row is completed, and when the image - is finished. If you aren't using all functions, - you can specify NULL parameters. Even when all - three functions are NULL, you need to call - png_set_progressive_read_fn(). You can use - any struct as the user_ptr (cast to a void pointer - for the function call), and retrieve the pointer - from inside the callbacks using the function - - png_get_progressive_ptr(png_ptr); - - which will return a void pointer, which you have - to cast appropriately. - */ - png_set_progressive_read_fn(png_ptr, (void *)user_ptr, - info_callback, row_callback, end_callback); - - return 0; - } - - /* A code fragment that you call as you receive blocks - of data */ - int - process_data(png_bytep buffer, png_uint_32 length) - { - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); - } - - /* This one's new also. Simply give it a chunk - of data from the file stream (in order, of - course). On machines with segmented memory - models machines, don't give it any more than - 64K. The library seems to run fine with sizes - of 4K. Although you can give it much less if - necessary (I assume you can give it chunks of - 1 byte, I haven't tried less then 256 bytes - yet). When this function returns, you may - want to display any rows that were generated - in the row callback if you don't already do - so there. - */ - png_process_data(png_ptr, info_ptr, buffer, length); - return 0; - } - - /* This function is called (as set by - png_set_progressive_read_fn() above) when enough data - has been supplied so all of the header has been - read. - */ - void - info_callback(png_structp png_ptr, png_infop info) - { - /* Do any setup here, including setting any of - the transformations mentioned in the Reading - PNG files section. For now, you _must_ call - either png_start_read_image() or - png_read_update_info() after all the - transformations are set (even if you don't set - any). You may start getting rows before - png_process_data() returns, so this is your - last chance to prepare for that. - */ - } - - /* This function is called when each row of image - data is complete */ - void - row_callback(png_structp png_ptr, png_bytep new_row, - png_uint_32 row_num, int pass) - { - /* If the image is interlaced, and you turned - on the interlace handler, this function will - be called for every row in every pass. Some - of these rows will not be changed from the - previous pass. When the row is not changed, - the new_row variable will be NULL. The rows - and passes are called in order, so you don't - really need the row_num and pass, but I'm - supplying them because it may make your life - easier. - - For the non-NULL rows of interlaced images, - you must call png_progressive_combine_row() - passing in the row and the old row. You can - call this function for NULL rows (it will just - return) and for non-interlaced images (it just - does the memcpy for you) if it will make the - code easier. Thus, you can just do this for - all cases: - */ - - png_progressive_combine_row(png_ptr, old_row, - new_row); - - /* where old_row is what was displayed for - previously for the row. Note that the first - pass (pass == 0, really) will completely cover - the old row, so the rows do not have to be - initialized. After the first pass (and only - for interlaced images), you will have to pass - the current row, and the function will combine - the old row and the new row. - */ - } - - void - end_callback(png_structp png_ptr, png_infop info) - { - /* This function is called after the whole image - has been read, including any chunks after the - image (up to and including the IEND). You - will usually have the same info chunk as you - had in the header, although some data may have - been added to the comments and time fields. - - Most people won't do much here, perhaps setting - a flag that marks the image as finished. - */ - } - - - -.SH IV. Writing - -Much of this is very similar to reading. However, everything of -importance is repeated here, so you won't have to constantly look -back up in the reading section to understand writing. - -.SS Setup - -You will want to do the I/O initialization before you get into libpng, -so if it doesn't work, you don't have anything to undo. If you are not -using the standard I/O functions, you will need to replace them with -custom writing functions. See the discussion under Customizing libpng. - - FILE *fp = fopen(file_name, "wb"); - if (!fp) - { - return (ERROR); - } - -Next, png_struct and png_info need to be allocated and initialized. -As these can be both relatively large, you may not want to store these -on the stack, unless you have stack space to spare. Of course, you -will want to check if they return NULL. If you are also reading, -you won't want to name your read structure and your write structure -both "png_ptr"; you can call them anything you like, such as -"read_ptr" and "write_ptr". Look at pngtest.c, for example. - - png_structp png_ptr = png_create_write_struct - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn); - if (!png_ptr) - return (ERROR); - - png_infop info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) - { - png_destroy_write_struct(&png_ptr, - (png_infopp)NULL); - return (ERROR); - } - -If you want to use your own memory allocation routines, -define PNG_USER_MEM_SUPPORTED and use -png_create_write_struct_2() instead of png_create_write_struct(): - - png_structp png_ptr = png_create_write_struct_2 - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn, (png_voidp) - user_mem_ptr, user_malloc_fn, user_free_fn); - -After you have these structures, you will need to set up the -error handling. When libpng encounters an error, it expects to -longjmp() back to your routine. Therefore, you will need to call -setjmp() and pass the png_jmpbuf(png_ptr). If you -write the file from different routines, you will need to update -the png_jmpbuf(png_ptr) every time you enter a new routine that will -call a png_*() function. See your documentation of setjmp/longjmp -for your compiler for more information on setjmp/longjmp. See -the discussion on libpng error handling in the Customizing Libpng -section below for more information on the libpng error handling. - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_write_struct(&png_ptr, &info_ptr); - fclose(fp); - return (ERROR); - } - ... - return; - -If you would rather avoid the complexity of setjmp/longjmp issues, -you can compile libpng with PNG_SETJMP_NOT_SUPPORTED, in which case -errors will result in a call to PNG_ABORT() which defaults to abort(). - -Now you need to set up the output code. The default for libpng is to -use the C function fwrite(). If you use this, you will need to pass a -valid FILE * in the function png_init_io(). Be sure that the file is -opened in binary mode. Again, if you wish to handle writing data in -another way, see the discussion on libpng I/O handling in the Customizing -Libpng section below. - - png_init_io(png_ptr, fp); - -.SS Write callbacks - -At this point, you can set up a callback function that will be -called after each row has been written, which you can use to control -a progress meter or the like. It's demonstrated in pngtest.c. -You must supply a function - - void write_row_callback(png_ptr, png_uint_32 row, int pass); - { - /* put your code here */ - } - -(You can give it another name that you like instead of "write_row_callback") - -To inform libpng about your function, use - - png_set_write_status_fn(png_ptr, write_row_callback); - -You now have the option of modifying how the compression library will -run. The following functions are mainly for testing, but may be useful -in some cases, like if you need to write PNG files extremely fast and -are willing to give up some compression, or if you want to get the -maximum possible compression at the expense of slower writing. If you -have no special needs in this area, let the library do what it wants by -not calling this function at all, as it has been tuned to deliver a good -speed/compression ratio. The second parameter to png_set_filter() is -the filter method, for which the only valid values are 0 (as of the -July 1999 PNG specification, version 1.2) or 64 (if you are writing -a PNG datastream that is to be embedded in a MNG datastream). The third -parameter is a flag that indicates which filter type(s) are to be tested -for each scanline. See the PNG specification for details on the specific filter -types. - - - /* turn on or off filtering, and/or choose - specific filters. You can use either a single PNG_FILTER_VALUE_NAME - or the logical OR of one or more PNG_FILTER_NAME masks. */ - png_set_filter(png_ptr, 0, - PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE | - PNG_FILTER_SUB | PNG_FILTER_VALUE_SUB | - PNG_FILTER_UP | PNG_FILTER_VALUE_UP | - PNG_FILTER_AVE | PNG_FILTER_VALUE_AVE | - PNG_FILTER_PAETH | PNG_FILTER_VALUE_PAETH| - PNG_ALL_FILTERS); - -If an application -wants to start and stop using particular filters during compression, -it should start out with all of the filters (to ensure that the previous -row of pixels will be stored in case it's needed later), and then add -and remove them after the start of compression. - -If you are writing a PNG datastream that is to be embedded in a MNG -datastream, the second parameter can be either 0 or 64. - -The png_set_compression_*() functions interface to the zlib compression -library, and should mostly be ignored unless you really know what you are -doing. The only generally useful call is png_set_compression_level() -which changes how much time zlib spends on trying to compress the image -data. See the Compression Library (zlib.h and algorithm.txt, distributed -with zlib) for details on the compression levels. - - /* set the zlib compression level */ - png_set_compression_level(png_ptr, - Z_BEST_COMPRESSION); - - /* set other zlib parameters */ - png_set_compression_mem_level(png_ptr, 8); - png_set_compression_strategy(png_ptr, - Z_DEFAULT_STRATEGY); - png_set_compression_window_bits(png_ptr, 15); - png_set_compression_method(png_ptr, 8); - png_set_compression_buffer_size(png_ptr, 8192) - -extern PNG_EXPORT(void,png_set_zbuf_size) - -.SS Setting the contents of info for output - -You now need to fill in the png_info structure with all the data you -wish to write before the actual image. Note that the only thing you -are allowed to write after the image is the text chunks and the time -chunk (as of PNG Specification 1.2, anyway). See png_write_end() and -the latest PNG specification for more information on that. If you -wish to write them before the image, fill them in now, and flag that -data as being valid. If you want to wait until after the data, don't -fill them until png_write_end(). For all the fields in png_info and -their data types, see png.h. For explanations of what the fields -contain, see the PNG specification. - -Some of the more important parts of the png_info are: - - png_set_IHDR(png_ptr, info_ptr, width, height, - bit_depth, color_type, interlace_type, - compression_type, filter_method) - width - holds the width of the image - in pixels (up to 2^31). - height - holds the height of the image - in pixels (up to 2^31). - bit_depth - holds the bit depth of one of the - image channels. - (valid values are 1, 2, 4, 8, 16 - and depend also on the - color_type. See also significant - bits (sBIT) below). - color_type - describes which color/alpha - channels are present. - PNG_COLOR_TYPE_GRAY - (bit depths 1, 2, 4, 8, 16) - PNG_COLOR_TYPE_GRAY_ALPHA - (bit depths 8, 16) - PNG_COLOR_TYPE_PALETTE - (bit depths 1, 2, 4, 8) - PNG_COLOR_TYPE_RGB - (bit_depths 8, 16) - PNG_COLOR_TYPE_RGB_ALPHA - (bit_depths 8, 16) - - PNG_COLOR_MASK_PALETTE - PNG_COLOR_MASK_COLOR - PNG_COLOR_MASK_ALPHA - - interlace_type - PNG_INTERLACE_NONE or - PNG_INTERLACE_ADAM7 - compression_type - (must be - PNG_COMPRESSION_TYPE_DEFAULT) - filter_method - (must be PNG_FILTER_TYPE_DEFAULT - or, if you are writing a PNG to - be embedded in a MNG datastream, - can also be - PNG_INTRAPIXEL_DIFFERENCING) - - png_set_PLTE(png_ptr, info_ptr, palette, - num_palette); - palette - the palette for the file - (array of png_color) - num_palette - number of entries in the palette - - png_set_gAMA(png_ptr, info_ptr, gamma); - gamma - the gamma the image was created - at (PNG_INFO_gAMA) - - png_set_sRGB(png_ptr, info_ptr, srgb_intent); - srgb_intent - the rendering intent - (PNG_INFO_sRGB) The presence of - the sRGB chunk means that the pixel - data is in the sRGB color space. - This chunk also implies specific - values of gAMA and cHRM. Rendering - intent is the CSS-1 property that - has been defined by the International - Color Consortium - (http://www.color.org). - It can be one of - PNG_sRGB_INTENT_SATURATION, - PNG_sRGB_INTENT_PERCEPTUAL, - PNG_sRGB_INTENT_ABSOLUTE, or - PNG_sRGB_INTENT_RELATIVE. - - - png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, - srgb_intent); - srgb_intent - the rendering intent - (PNG_INFO_sRGB) The presence of the - sRGB chunk means that the pixel - data is in the sRGB color space. - This function also causes gAMA and - cHRM chunks with the specific values - that are consistent with sRGB to be - written. - - png_set_iCCP(png_ptr, info_ptr, name, compression_type, - profile, proflen); - name - The profile name. - compression - The compression type; always PNG_COMPRESSION_TYPE_BASE - for PNG 1.0. You may give NULL to this argument - to ignore it. - profile - International Color Consortium color profile - data. May contain NULs. - proflen - length of profile data in bytes. - - png_set_sBIT(png_ptr, info_ptr, sig_bit); - sig_bit - the number of significant bits for - (PNG_INFO_sBIT) each of the gray, red, - green, and blue channels, whichever are - appropriate for the given color type - (png_color_16) - - png_set_tRNS(png_ptr, info_ptr, trans, num_trans, - trans_values); - trans - array of transparent entries for - palette (PNG_INFO_tRNS) - trans_values - graylevel or color sample values of - the single transparent color for - non-paletted images (PNG_INFO_tRNS) - num_trans - number of transparent entries - (PNG_INFO_tRNS) - - png_set_hIST(png_ptr, info_ptr, hist); - (PNG_INFO_hIST) - hist - histogram of palette (array of - png_uint_16) - - png_set_tIME(png_ptr, info_ptr, mod_time); - mod_time - time image was last modified - (PNG_VALID_tIME) - - png_set_bKGD(png_ptr, info_ptr, background); - background - background color (PNG_VALID_bKGD) - - png_set_text(png_ptr, info_ptr, text_ptr, num_text); - text_ptr - array of png_text holding image - comments - text_ptr[i].compression - type of compression used - on "text" PNG_TEXT_COMPRESSION_NONE - PNG_TEXT_COMPRESSION_zTXt - PNG_ITXT_COMPRESSION_NONE - PNG_ITXT_COMPRESSION_zTXt - text_ptr[i].key - keyword for comment. Must contain - 1-79 characters. - text_ptr[i].text - text comments for current - keyword. Can be NULL or empty. - text_ptr[i].text_length - length of text string, - after decompression, 0 for iTXt - text_ptr[i].itxt_length - length of itxt string, - after decompression, 0 for tEXt/zTXt - text_ptr[i].lang - language of comment (NULL or - empty for unknown). - text_ptr[i].translated_keyword - keyword in UTF-8 (NULL - or empty for unknown). - num_text - number of comments - - png_set_sPLT(png_ptr, info_ptr, &palette_ptr, num_spalettes); - palette_ptr - array of png_sPLT_struct structures to be - added to the list of palettes in the info - structure. - num_spalettes - number of palette structures to be added. - - png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, - unit_type); - offset_x - positive offset from the left - edge of the screen - offset_y - positive offset from the top - edge of the screen - unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER - - png_set_pHYs(png_ptr, info_ptr, res_x, res_y, - unit_type); - res_x - pixels/unit physical resolution - in x direction - res_y - pixels/unit physical resolution - in y direction - unit_type - PNG_RESOLUTION_UNKNOWN, - PNG_RESOLUTION_METER - - png_set_sCAL(png_ptr, info_ptr, unit, width, height) - unit - physical scale units (an integer) - width - width of a pixel in physical scale units - height - height of a pixel in physical scale units - (width and height are doubles) - - png_set_sCAL_s(png_ptr, info_ptr, unit, width, height) - unit - physical scale units (an integer) - width - width of a pixel in physical scale units - height - height of a pixel in physical scale units - (width and height are strings like "2.54") - - png_set_unknown_chunks(png_ptr, info_ptr, &unknowns, num_unknowns) - unknowns - array of png_unknown_chunk structures holding - unknown chunks - unknowns[i].name - name of unknown chunk - unknowns[i].data - data of unknown chunk - unknowns[i].size - size of unknown chunk's data - unknowns[i].location - position to write chunk in file - 0: do not write chunk - PNG_HAVE_IHDR: before PLTE - PNG_HAVE_PLTE: before IDAT - PNG_AFTER_IDAT: after IDAT - The "location" member is set automatically according to - what part of the output file has already been written. - You can change its value after calling png_set_unknown_chunks() - as demonstrated in pngtest.c. Within each of the "locations", - the chunks are sequenced according to their position in the - structure (that is, the value of "i", which is the order in which - the chunk was either read from the input file or defined with - png_set_unknown_chunks). - -A quick word about text and num_text. text is an array of png_text -structures. num_text is the number of valid structures in the array. -Each png_text structure holds a language code, a keyword, a text value, -and a compression type. - -The compression types have the same valid numbers as the compression -types of the image data. Currently, the only valid number is zero. -However, you can store text either compressed or uncompressed, unlike -images, which always have to be compressed. So if you don't want the -text compressed, set the compression type to PNG_TEXT_COMPRESSION_NONE. -Because tEXt and zTXt chunks don't have a language field, if you -specify PNG_TEXT_COMPRESSION_NONE or PNG_TEXT_COMPRESSION_zTXt -any language code or translated keyword will not be written out. - -Until text gets around 1000 bytes, it is not worth compressing it. -After the text has been written out to the file, the compression type -is set to PNG_TEXT_COMPRESSION_NONE_WR or PNG_TEXT_COMPRESSION_zTXt_WR, -so that it isn't written out again at the end (in case you are calling -png_write_end() with the same struct. - -The keywords that are given in the PNG Specification are: - - Title Short (one line) title or - caption for image - Author Name of image's creator - Description Description of image (possibly long) - Copyright Copyright notice - Creation Time Time of original image creation - (usually RFC 1123 format, see below) - Software Software used to create the image - Disclaimer Legal disclaimer - Warning Warning of nature of content - Source Device used to create the image - Comment Miscellaneous comment; conversion - from other image format - -The keyword-text pairs work like this. Keywords should be short -simple descriptions of what the comment is about. Some typical -keywords are found in the PNG specification, as is some recommendations -on keywords. You can repeat keywords in a file. You can even write -some text before the image and some after. For example, you may want -to put a description of the image before the image, but leave the -disclaimer until after, so viewers working over modem connections -don't have to wait for the disclaimer to go over the modem before -they start seeing the image. Finally, keywords should be full -words, not abbreviations. Keywords and text are in the ISO 8859-1 -(Latin-1) character set (a superset of regular ASCII) and can not -contain NUL characters, and should not contain control or other -unprintable characters. To make the comments widely readable, stick -with basic ASCII, and avoid machine specific character set extensions -like the IBM-PC character set. The keyword must be present, but -you can leave off the text string on non-compressed pairs. -Compressed pairs must have a text string, as only the text string -is compressed anyway, so the compression would be meaningless. - -PNG supports modification time via the png_time structure. Two -conversion routines are provided, png_convert_from_time_t() for -time_t and png_convert_from_struct_tm() for struct tm. The -time_t routine uses gmtime(). You don't have to use either of -these, but if you wish to fill in the png_time structure directly, -you should provide the time in universal time (GMT) if possible -instead of your local time. Note that the year number is the full -year (e.g. 1998, rather than 98 - PNG is year 2000 compliant!), and -that months start with 1. - -If you want to store the time of the original image creation, you should -use a plain tEXt chunk with the "Creation Time" keyword. This is -necessary because the "creation time" of a PNG image is somewhat vague, -depending on whether you mean the PNG file, the time the image was -created in a non-PNG format, a still photo from which the image was -scanned, or possibly the subject matter itself. In order to facilitate -machine-readable dates, it is recommended that the "Creation Time" -tEXt chunk use RFC 1123 format dates (e.g. "22 May 1997 18:07:10 GMT"), -although this isn't a requirement. Unlike the tIME chunk, the -"Creation Time" tEXt chunk is not expected to be automatically changed -by the software. To facilitate the use of RFC 1123 dates, a function -png_convert_to_rfc1123(png_timep) is provided to convert from PNG -time to an RFC 1123 format string. - -.SS Writing unknown chunks - -You can use the png_set_unknown_chunks function to queue up chunks -for writing. You give it a chunk name, raw data, and a size; that's -all there is to it. The chunks will be written by the next following -png_write_info_before_PLTE, png_write_info, or png_write_end function. -Any chunks previously read into the info structure's unknown-chunk -list will also be written out in a sequence that satisfies the PNG -specification's ordering rules. - -.SS The high-level write interface - -At this point there are two ways to proceed; through the high-level -write interface, or through a sequence of low-level write operations. -You can use the high-level interface if your image data is present -in the info structure. All defined output -transformations are permitted, enabled by the following masks. - - PNG_TRANSFORM_IDENTITY No transformation - PNG_TRANSFORM_PACKING Pack 1, 2 and 4-bit samples - PNG_TRANSFORM_PACKSWAP Change order of packed pixels to LSB first - PNG_TRANSFORM_INVERT_MONO Invert monochrome images - PNG_TRANSFORM_SHIFT Normalize pixels to the sBIT depth - PNG_TRANSFORM_BGR Flip RGB to BGR, RGBA to BGRA - PNG_TRANSFORM_SWAP_ALPHA Flip RGBA to ARGB or GA to AG - PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity to transparency - PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples - PNG_TRANSFORM_STRIP_FILLER Strip out filler bytes. - -If you have valid image data in the info structure (you can use -png_set_rows() to put image data in the info structure), simply do this: - - png_write_png(png_ptr, info_ptr, png_transforms, NULL) - -where png_transforms is an integer containing the logical OR of some set of -transformation flags. This call is equivalent to png_write_info(), -followed the set of transformations indicated by the transform mask, -then png_write_image(), and finally png_write_end(). - -(The final parameter of this call is not yet used. Someday it might point -to transformation parameters required by some future output transform.) - -.SS The low-level write interface - -If you are going the low-level route instead, you are now ready to -write all the file information up to the actual image data. You do -this with a call to png_write_info(). - - png_write_info(png_ptr, info_ptr); - -Note that there is one transformation you may need to do before -png_write_info(). In PNG files, the alpha channel in an image is the -level of opacity. If your data is supplied as a level of -transparency, you can invert the alpha channel before you write it, so -that 0 is fully transparent and 255 (in 8-bit or paletted images) or -65535 (in 16-bit images) is fully opaque, with - - png_set_invert_alpha(png_ptr); - -This must appear before png_write_info() instead of later with the -other transformations because in the case of paletted images the tRNS -chunk data has to be inverted before the tRNS chunk is written. If -your image is not a paletted image, the tRNS data (which in such cases -represents a single color to be rendered as transparent) won't need to -be changed, and you can safely do this transformation after your -png_write_info() call. - -If you need to write a private chunk that you want to appear before -the PLTE chunk when PLTE is present, you can write the PNG info in -two steps, and insert code to write your own chunk between them: - - png_write_info_before_PLTE(png_ptr, info_ptr); - png_set_unknown_chunks(png_ptr, info_ptr, ...); - png_write_info(png_ptr, info_ptr); - -After you've written the file information, you can set up the library -to handle any special transformations of the image data. The various -ways to transform the data will be described in the order that they -should occur. This is important, as some of these change the color -type and/or bit depth of the data, and some others only work on -certain color types and bit depths. Even though each transformation -checks to see if it has data that it can do something with, you should -make sure to only enable a transformation if it will be valid for the -data. For example, don't swap red and blue on grayscale data. - -PNG files store RGB pixels packed into 3 or 6 bytes. This code tells -the library to strip input data that has 4 or 8 bytes per pixel down -to 3 or 6 bytes (or strip 2 or 4-byte grayscale+filler data to 1 or 2 -bytes per pixel). - - png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); - -where the 0 is unused, and the location is either PNG_FILLER_BEFORE or -PNG_FILLER_AFTER, depending upon whether the filler byte in the pixel -is stored XRGB or RGBX. - -PNG files pack pixels of bit depths 1, 2, and 4 into bytes as small as -they can, resulting in, for example, 8 pixels per byte for 1 bit files. -If the data is supplied at 1 pixel per byte, use this code, which will -correctly pack the pixels into a single byte: - - png_set_packing(png_ptr); - -PNG files reduce possible bit depths to 1, 2, 4, 8, and 16. If your -data is of another bit depth, you can write an sBIT chunk into the -file so that decoders can recover the original data if desired. - - /* Set the true bit depth of the image data */ - if (color_type & PNG_COLOR_MASK_COLOR) - { - sig_bit.red = true_bit_depth; - sig_bit.green = true_bit_depth; - sig_bit.blue = true_bit_depth; - } - else - { - sig_bit.gray = true_bit_depth; - } - if (color_type & PNG_COLOR_MASK_ALPHA) - { - sig_bit.alpha = true_bit_depth; - } - - png_set_sBIT(png_ptr, info_ptr, &sig_bit); - -If the data is stored in the row buffer in a bit depth other than -one supported by PNG (e.g. 3 bit data in the range 0-7 for a 4-bit PNG), -this will scale the values to appear to be the correct bit depth as -is required by PNG. - - png_set_shift(png_ptr, &sig_bit); - -PNG files store 16 bit pixels in network byte order (big-endian, -ie. most significant bits first). This code would be used if they are -supplied the other way (little-endian, i.e. least significant bits -first, the way PCs store them): - - if (bit_depth > 8) - png_set_swap(png_ptr); - -If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you -need to change the order the pixels are packed into bytes, you can use: - - if (bit_depth < 8) - png_set_packswap(png_ptr); - -PNG files store 3 color pixels in red, green, blue order. This code -would be used if they are supplied as blue, green, red: - - png_set_bgr(png_ptr); - -PNG files describe monochrome as black being zero and white being -one. This code would be used if the pixels are supplied with this reversed -(black being one and white being zero): - - png_set_invert_mono(png_ptr); - -Finally, you can write your own transformation function if none of -the existing ones meets your needs. This is done by setting a callback -with - - png_set_write_user_transform_fn(png_ptr, - write_transform_fn); - -You must supply the function - - void write_transform_fn(png_ptr ptr, row_info_ptr - row_info, png_bytep data) - -See pngtest.c for a working example. Your function will be called -before any of the other transformations are processed. - -You can also set up a pointer to a user structure for use by your -callback function. - - png_set_user_transform_info(png_ptr, user_ptr, 0, 0); - -The user_channels and user_depth parameters of this function are ignored -when writing; you can set them to zero as shown. - -You can retrieve the pointer via the function png_get_user_transform_ptr(). -For example: - - voidp write_user_transform_ptr = - png_get_user_transform_ptr(png_ptr); - -It is possible to have libpng flush any pending output, either manually, -or automatically after a certain number of lines have been written. To -flush the output stream a single time call: - - png_write_flush(png_ptr); - -and to have libpng flush the output stream periodically after a certain -number of scanlines have been written, call: - - png_set_flush(png_ptr, nrows); - -Note that the distance between rows is from the last time png_write_flush() -was called, or the first row of the image if it has never been called. -So if you write 50 lines, and then png_set_flush 25, it will flush the -output on the next scanline, and every 25 lines thereafter, unless -png_write_flush() is called before 25 more lines have been written. -If nrows is too small (less than about 10 lines for a 640 pixel wide -RGB image) the image compression may decrease noticeably (although this -may be acceptable for real-time applications). Infrequent flushing will -only degrade the compression performance by a few percent over images -that do not use flushing. - -.SS Writing the image data - -That's it for the transformations. Now you can write the image data. -The simplest way to do this is in one function call. If you have the -whole image in memory, you can just call png_write_image() and libpng -will write the image. You will need to pass in an array of pointers to -each row. This function automatically handles interlacing, so you don't -need to call png_set_interlace_handling() or call this function multiple -times, or any of that other stuff necessary with png_write_rows(). - - png_write_image(png_ptr, row_pointers); - -where row_pointers is: - - png_byte *row_pointers[height]; - -You can point to void or char or whatever you use for pixels. - -If you don't want to write the whole image at once, you can -use png_write_rows() instead. If the file is not interlaced, -this is simple: - - png_write_rows(png_ptr, row_pointers, - number_of_rows); - -row_pointers is the same as in the png_write_image() call. - -If you are just writing one row at a time, you can do this with -a single row_pointer instead of an array of row_pointers: - - png_bytep row_pointer = row; - - png_write_row(png_ptr, row_pointer); - -When the file is interlaced, things can get a good deal more -complicated. The only currently (as of the PNG Specification -version 1.2, dated July 1999) defined interlacing scheme for PNG files -is the "Adam7" interlace scheme, that breaks down an -image into seven smaller images of varying size. libpng will build -these images for you, or you can do them yourself. If you want to -build them yourself, see the PNG specification for details of which -pixels to write when. - -If you don't want libpng to handle the interlacing details, just -use png_set_interlace_handling() and call png_write_rows() the -correct number of times to write all seven sub-images. - -If you want libpng to build the sub-images, call this before you start -writing any rows: - - number_of_passes = - png_set_interlace_handling(png_ptr); - -This will return the number of passes needed. Currently, this -is seven, but may change if another interlace type is added. - -Then write the complete image number_of_passes times. - - png_write_rows(png_ptr, row_pointers, - number_of_rows); - -As some of these rows are not used, and thus return immediately, -you may want to read about interlacing in the PNG specification, -and only update the rows that are actually used. - -.SS Finishing a sequential write - -After you are finished writing the image, you should finish writing -the file. If you are interested in writing comments or time, you should -pass an appropriately filled png_info pointer. If you are not interested, -you can pass NULL. - - png_write_end(png_ptr, info_ptr); - -When you are done, you can free all memory used by libpng like this: - - png_destroy_write_struct(&png_ptr, &info_ptr); - -It is also possible to individually free the info_ptr members that -point to libpng-allocated storage with the following function: - - png_free_data(png_ptr, info_ptr, mask, n) - mask - identifies data to be freed, a mask - containing the logical OR of one or - more of - PNG_FREE_PLTE, PNG_FREE_TRNS, - PNG_FREE_HIST, PNG_FREE_ICCP, - PNG_FREE_PCAL, PNG_FREE_ROWS, - PNG_FREE_SCAL, PNG_FREE_SPLT, - PNG_FREE_TEXT, PNG_FREE_UNKN, - or simply PNG_FREE_ALL - n - sequence number of item to be freed - (-1 for all items) - -This function may be safely called when the relevant storage has -already been freed, or has not yet been allocated, or was allocated -by the user and not by libpng, and will in those -cases do nothing. The "n" parameter is ignored if only one item -of the selected data type, such as PLTE, is allowed. If "n" is not --1, and multiple items are allowed for the data type identified in -the mask, such as text or sPLT, only the n'th item is freed. - -If you allocated data such as a palette that you passed -in to libpng with png_set_*, you must not free it until just before the call to -png_destroy_write_struct(). - -The default behavior is only to free data that was allocated internally -by libpng. This can be changed, so that libpng will not free the data, -or so that it will free data that was allocated by the user with png_malloc() -or png_zalloc() and passed in via a png_set_*() function, with - - png_data_freer(png_ptr, info_ptr, freer, mask) - mask - which data elements are affected - same choices as in png_free_data() - freer - one of - PNG_DESTROY_WILL_FREE_DATA - PNG_SET_WILL_FREE_DATA - PNG_USER_WILL_FREE_DATA - -For example, to transfer responsibility for some data from a read structure -to a write structure, you could use - - png_data_freer(read_ptr, read_info_ptr, - PNG_USER_WILL_FREE_DATA, - PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST) - png_data_freer(write_ptr, write_info_ptr, - PNG_DESTROY_WILL_FREE_DATA, - PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST) - -thereby briefly reassigning responsibility for freeing to the user but -immediately afterwards reassigning it once more to the write_destroy -function. Having done this, it would then be safe to destroy the read -structure and continue to use the PLTE, tRNS, and hIST data in the write -structure. - -This function only affects data that has already been allocated. -You can call this function before calling after the png_set_*() functions -to control whether the user or png_destroy_*() is supposed to free the data. -When the user assumes responsibility for libpng-allocated data, the -application must use -png_free() to free it, and when the user transfers responsibility to libpng -for data that the user has allocated, the user must have used png_malloc() -or png_zalloc() to allocate it. - -If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword -separately, do not transfer responsibility for freeing text_ptr to libpng, -because when libpng fills a png_text structure it combines these members with -the key member, and png_free_data() will free only text_ptr.key. Similarly, -if you transfer responsibility for free'ing text_ptr from libpng to your -application, your application must not separately free those members. -For a more compact example of writing a PNG image, see the file example.c. - -.SH V. Modifying/Customizing libpng: - -There are three issues here. The first is changing how libpng does -standard things like memory allocation, input/output, and error handling. -The second deals with more complicated things like adding new chunks, -adding new transformations, and generally changing how libpng works. -Both of those are compile-time issues; that is, they are generally -determined at the time the code is written, and there is rarely a need -to provide the user with a means of changing them. The third is a -run-time issue: choosing between and/or tuning one or more alternate -versions of computationally intensive routines; specifically, optimized -assembly-language (and therefore compiler- and platform-dependent) -versions. - -Memory allocation, input/output, and error handling - -All of the memory allocation, input/output, and error handling in libpng -goes through callbacks that are user-settable. The default routines are -in pngmem.c, pngrio.c, pngwio.c, and pngerror.c, respectively. To change -these functions, call the appropriate png_set_*_fn() function. - -Memory allocation is done through the functions png_malloc(), png_zalloc(), -and png_free(). These currently just call the standard C functions. If -your pointers can't access more then 64K at a time, you will want to set -MAXSEG_64K in zlib.h. Since it is unlikely that the method of handling -memory allocation on a platform will change between applications, these -functions must be modified in the library at compile time. If you prefer -to use a different method of allocating and freeing data, you can use - - png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr - malloc_fn, png_free_ptr free_fn) - -This function also provides a void pointer that can be retrieved via - - mem_ptr=png_get_mem_ptr(png_ptr); - -Your replacement memory functions must have prototypes as follows: - - png_voidp malloc_fn(png_structp png_ptr, png_uint_32 size); - void free_fn(png_structp png_ptr, png_voidp ptr); - -Input/Output in libpng is done through png_read() and png_write(), -which currently just call fread() and fwrite(). The FILE * is stored in -png_struct and is initialized via png_init_io(). If you wish to change -the method of I/O, the library supplies callbacks that you can set -through the function png_set_read_fn() and png_set_write_fn() at run -time, instead of calling the png_init_io() function. These functions -also provide a void pointer that can be retrieved via the function -png_get_io_ptr(). For example: - - png_set_read_fn(png_structp read_ptr, - voidp read_io_ptr, png_rw_ptr read_data_fn) - - png_set_write_fn(png_structp write_ptr, - voidp write_io_ptr, png_rw_ptr write_data_fn, - png_flush_ptr output_flush_fn); - - voidp read_io_ptr = png_get_io_ptr(read_ptr); - voidp write_io_ptr = png_get_io_ptr(write_ptr); - -The replacement I/O functions must have prototypes as follows: - - void user_read_data(png_structp png_ptr, - png_bytep data, png_uint_32 length); - void user_write_data(png_structp png_ptr, - png_bytep data, png_uint_32 length); - void user_flush_data(png_structp png_ptr); - -Supplying NULL for the read, write, or flush functions sets them back -to using the default C stream functions. It is an error to read from -a write stream, and vice versa. - -Error handling in libpng is done through png_error() and png_warning(). -Errors handled through png_error() are fatal, meaning that png_error() -should never return to its caller. Currently, this is handled via -setjmp() and longjmp() (unless you have compiled libpng with -PNG_SETJMP_NOT_SUPPORTED, in which case it is handled via PNG_ABORT()), -but you could change this to do things like exit() if you should wish. - -On non-fatal errors, png_warning() is called -to print a warning message, and then control returns to the calling code. -By default png_error() and png_warning() print a message on stderr via -fprintf() unless the library is compiled with PNG_NO_CONSOLE_IO defined -(because you don't want the messages) or PNG_NO_STDIO defined (because -fprintf() isn't available). If you wish to change the behavior of the error -functions, you will need to set up your own message callbacks. These -functions are normally supplied at the time that the png_struct is created. -It is also possible to redirect errors and warnings to your own replacement -functions after png_create_*_struct() has been called by calling: - - png_set_error_fn(png_structp png_ptr, - png_voidp error_ptr, png_error_ptr error_fn, - png_error_ptr warning_fn); - - png_voidp error_ptr = png_get_error_ptr(png_ptr); - -If NULL is supplied for either error_fn or warning_fn, then the libpng -default function will be used, calling fprintf() and/or longjmp() if a -problem is encountered. The replacement error functions should have -parameters as follows: - - void user_error_fn(png_structp png_ptr, - png_const_charp error_msg); - void user_warning_fn(png_structp png_ptr, - png_const_charp warning_msg); - -The motivation behind using setjmp() and longjmp() is the C++ throw and -catch exception handling methods. This makes the code much easier to write, -as there is no need to check every return code of every function call. -However, there are some uncertainties about the status of local variables -after a longjmp, so the user may want to be careful about doing anything after -setjmp returns non-zero besides returning itself. Consult your compiler -documentation for more details. For an alternative approach, you may wish -to use the "cexcept" facility (see http://cexcept.sourceforge.net). - -.SS Custom chunks - -If you need to read or write custom chunks, you may need to get deeper -into the libpng code. The library now has mechanisms for storing -and writing chunks of unknown type; you can even declare callbacks -for custom chunks. Hoewver, this may not be good enough if the -library code itself needs to know about interactions between your -chunk and existing `intrinsic' chunks. - -If you need to write a new intrinsic chunk, first read the PNG -specification. Acquire a first level of -understanding of how it works. Pay particular attention to the -sections that describe chunk names, and look at how other chunks were -designed, so you can do things similarly. Second, check out the -sections of libpng that read and write chunks. Try to find a chunk -that is similar to yours and use it as a template. More details can -be found in the comments inside the code. It is best to handle unknown -chunks in a generic method, via callback functions, instead of by -modifying libpng functions. - -If you wish to write your own transformation for the data, look through -the part of the code that does the transformations, and check out some of -the simpler ones to get an idea of how they work. Try to find a similar -transformation to the one you want to add and copy off of it. More details -can be found in the comments inside the code itself. - -.SS Configuring for 16 bit platforms - -You will want to look into zconf.h to tell zlib (and thus libpng) that -it cannot allocate more then 64K at a time. Even if you can, the memory -won't be accessible. So limit zlib and libpng to 64K by defining MAXSEG_64K. - -.SS Configuring for DOS - -For DOS users who only have access to the lower 640K, you will -have to limit zlib's memory usage via a png_set_compression_mem_level() -call. See zlib.h or zconf.h in the zlib library for more information. - -.SS Configuring for Medium Model - -Libpng's support for medium model has been tested on most of the popular -compilers. Make sure MAXSEG_64K gets defined, USE_FAR_KEYWORD gets -defined, and FAR gets defined to far in pngconf.h, and you should be -all set. Everything in the library (except for zlib's structure) is -expecting far data. You must use the typedefs with the p or pp on -the end for pointers (or at least look at them and be careful). Make -note that the rows of data are defined as png_bytepp, which is an -unsigned char far * far *. - -.SS Configuring for gui/windowing platforms: - -You will need to write new error and warning functions that use the GUI -interface, as described previously, and set them to be the error and -warning functions at the time that png_create_*_struct() is called, -in order to have them available during the structure initialization. -They can be changed later via png_set_error_fn(). On some compilers, -you may also have to change the memory allocators (png_malloc, etc.). - -.SS Configuring for compiler xxx: - -All includes for libpng are in pngconf.h. If you need to add/change/delete -an include, this is the place to do it. The includes that are not -needed outside libpng are protected by the PNG_INTERNAL definition, -which is only defined for those routines inside libpng itself. The -files in libpng proper only include png.h, which includes pngconf.h. - -.SS Configuring zlib: - -There are special functions to configure the compression. Perhaps the -most useful one changes the compression level, which currently uses -input compression values in the range 0 - 9. The library normally -uses the default compression level (Z_DEFAULT_COMPRESSION = 6). Tests -have shown that for a large majority of images, compression values in -the range 3-6 compress nearly as well as higher levels, and do so much -faster. For online applications it may be desirable to have maximum speed -(Z_BEST_SPEED = 1). With versions of zlib after v0.99, you can also -specify no compression (Z_NO_COMPRESSION = 0), but this would create -files larger than just storing the raw bitmap. You can specify the -compression level by calling: - - png_set_compression_level(png_ptr, level); - -Another useful one is to reduce the memory level used by the library. -The memory level defaults to 8, but it can be lowered if you are -short on memory (running DOS, for example, where you only have 640K). - - png_set_compression_mem_level(png_ptr, level); - -The other functions are for configuring zlib. They are not recommended -for normal use and may result in writing an invalid PNG file. See -zlib.h for more information on what these mean. - - png_set_compression_strategy(png_ptr, - strategy); - png_set_compression_window_bits(png_ptr, - window_bits); - png_set_compression_method(png_ptr, method); - png_set_compression_buffer_size(png_ptr, size); - -.SS Controlling row filtering - -If you want to control whether libpng uses filtering or not, which -filters are used, and how it goes about picking row filters, you -can call one of these functions. The selection and configuration -of row filters can have a significant impact on the size and -encoding speed and a somewhat lesser impact on the decoding speed -of an image. Filtering is enabled by default for RGB and grayscale -images (with and without alpha), but not for paletted images nor -for any images with bit depths less than 8 bits/pixel. - -The 'method' parameter sets the main filtering method, which is -currently only '0' in the PNG 1.2 specification. The 'filters' -parameter sets which filter(s), if any, should be used for each -scanline. Possible values are PNG_ALL_FILTERS and PNG_NO_FILTERS -to turn filtering on and off, respectively. - -Individual filter types are PNG_FILTER_NONE, PNG_FILTER_SUB, -PNG_FILTER_UP, PNG_FILTER_AVG, PNG_FILTER_PAETH, which can be bitwise -ORed together with '|' to specify one or more filters to use. -These filters are described in more detail in the PNG specification. If -you intend to change the filter type during the course of writing -the image, you should start with flags set for all of the filters -you intend to use so that libpng can initialize its internal -structures appropriately for all of the filter types. - - filters = PNG_FILTER_NONE | PNG_FILTER_SUB - PNG_FILTER_UP | PNG_FILTER_AVE | - PNG_FILTER_PAETH | PNG_ALL_FILTERS; - or - filters = one of PNG_FILTER_VALUE_NONE, - PNG_FILTER_VALUE_SUB, PNG_FILTER_VALUE_UP, - PNG_FILTER_VALUE_AVE, PNG_FILTER_VALUE_PAETH - - png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, - filters); - The second parameter can also be PNG_INTRAPIXEL_DIFFERENCING - if you are writing a PNG to be embedded in a MNG - datastream. This parameter must be the same as the - value of filter_method used in png_set_IHDR(). - -It is also possible to influence how libpng chooses from among the -available filters. This is done in two ways - by telling it how -important it is to keep the same filter for successive rows, and -by telling it the relative computational costs of the filters. - - double weights[3] = {1.5, 1.3, 1.1}, - costs[PNG_FILTER_VALUE_LAST] = - {1.0, 1.3, 1.3, 1.5, 1.7}; - - png_set_filter_selection(png_ptr, - PNG_FILTER_SELECTION_WEIGHTED, 3, - weights, costs); - -The weights are multiplying factors that indicate to libpng that the -row filter should be the same for successive rows unless another row filter -is that many times better than the previous filter. In the above example, -if the previous 3 filters were SUB, SUB, NONE, the SUB filter could have a -"sum of absolute differences" 1.5 x 1.3 times higher than other filters -and still be chosen, while the NONE filter could have a sum 1.1 times -higher than other filters and still be chosen. Unspecified weights are -taken to be 1.0, and the specified weights should probably be declining -like those above in order to emphasize recent filters over older filters. - -The filter costs specify for each filter type a relative decoding cost -to be considered when selecting row filters. This means that filters -with higher costs are less likely to be chosen over filters with lower -costs, unless their "sum of absolute differences" is that much smaller. -The costs do not necessarily reflect the exact computational speeds of -the various filters, since this would unduly influence the final image -size. - -Note that the numbers above were invented purely for this example and -are given only to help explain the function usage. Little testing has -been done to find optimum values for either the costs or the weights. - -.SS Removing unwanted object code - -There are a bunch of #define's in pngconf.h that control what parts of -libpng are compiled. All the defines end in _SUPPORTED. If you are -never going to use a capability, you can change the #define to #undef -before recompiling libpng and save yourself code and data space, or -you can turn off individual capabilities with defines that begin with -PNG_NO_. - -You can also turn all of the transforms and ancillary chunk capabilities -off en masse with compiler directives that define -PNG_NO_READ[or WRITE]_TRANSFORMS, or PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS, -or all four, -along with directives to turn on any of the capabilities that you do -want. The PNG_NO_READ[or WRITE]_TRANSFORMS directives disable -the extra transformations but still leave the library fully capable of reading -and writing PNG files with all known public chunks -Use of the PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS directive -produces a library that is incapable of reading or writing ancillary chunks. -If you are not using the progressive reading capability, you can -turn that off with PNG_NO_PROGRESSIVE_READ (don't confuse -this with the INTERLACING capability, which you'll still have). - -All the reading and writing specific code are in separate files, so the -linker should only grab the files it needs. However, if you want to -make sure, or if you are building a stand alone library, all the -reading files start with pngr and all the writing files start with -pngw. The files that don't match either (like png.c, pngtrans.c, etc.) -are used for both reading and writing, and always need to be included. -The progressive reader is in pngpread.c - -If you are creating or distributing a dynamically linked library (a .so -or DLL file), you should not remove or disable any parts of the library, -as this will cause applications linked with different versions of the -library to fail if they call functions not available in your library. -The size of the library itself should not be an issue, because only -those sections that are actually used will be loaded into memory. - -.SS Requesting debug printout - -The macro definition PNG_DEBUG can be used to request debugging -printout. Set it to an integer value in the range 0 to 3. Higher -numbers result in increasing amounts of debugging information. The -information is printed to the "stderr" file, unless another file -name is specified in the PNG_DEBUG_FILE macro definition. - -When PNG_DEBUG > 0, the following functions (macros) become available: - - png_debug(level, message) - png_debug1(level, message, p1) - png_debug2(level, message, p1, p2) - -in which "level" is compared to PNG_DEBUG to decide whether to print -the message, "message" is the formatted string to be printed, -and p1 and p2 are parameters that are to be embedded in the string -according to printf-style formatting directives. For example, - - png_debug1(2, "foo=%d\n", foo); - -is expanded to - - if(PNG_DEBUG > 2) - fprintf(PNG_DEBUG_FILE, "foo=%d\n", foo); - -When PNG_DEBUG is defined but is zero, the macros aren't defined, but you -can still use PNG_DEBUG to control your own debugging: - - #ifdef PNG_DEBUG - fprintf(stderr, ... - #endif - -When PNG_DEBUG = 1, the macros are defined, but only png_debug statements -having level = 0 will be printed. There aren't any such statements in -this version of libpng, but if you insert some they will be printed. - - -.SH VI. MNG support - -The MNG specification (available at http://www.libpng.org/pub/mng) allows -certain extensions to PNG for PNG images that are embedded in MNG datastreams. -Libpng can support some of these extensions. To enable them, use the -png_permit_mng_features() function: - - feature_set = png_permit_mng_features(png_ptr, mask) - mask is a png_uint_32 containing the logical OR of the - features you want to enable. These include - PNG_FLAG_MNG_EMPTY_PLTE - PNG_FLAG_MNG_FILTER_64 - PNG_ALL_MNG_FEATURES - feature_set is a png_32_uint that is the logical AND of - your mask with the set of MNG features that is - supported by the version of libpng that you are using. - -It is an error to use this function when reading or writing a standalone -PNG file with the PNG 8-byte signature. The PNG datastream must be wrapped -in a MNG datastream. As a minimum, it must have the MNG 8-byte signature -and the MHDR and MEND chunks. Libpng does not provide support for these -or any other MNG chunks; your application must provide its own support for -them. You may wish to consider using libmng (available at -http://www.libmng.com) instead. - -.SH VII. Changes to Libpng from version 0.88 - -It should be noted that versions of libpng later than 0.96 are not -distributed by the original libpng author, Guy Schalnat, nor by -Andreas Dilger, who had taken over from Guy during 1996 and 1997, and -distributed versions 0.89 through 0.96, but rather by another member -of the original PNG Group, Glenn Randers-Pehrson. Guy and Andreas are -still alive and well, but they have moved on to other things. - -The old libpng functions png_read_init(), png_write_init(), -png_info_init(), png_read_destroy(), and png_write_destory() have been -moved to PNG_INTERNAL in version 0.95 to discourage their use. These -functions will be removed from libpng version 2.0.0. - -The preferred method of creating and initializing the libpng structures is -via the png_create_read_struct(), png_create_write_struct(), and -png_create_info_struct() because they isolate the size of the structures -from the application, allow version error checking, and also allow the -use of custom error handling routines during the initialization, which -the old functions do not. The functions png_read_destroy() and -png_write_destroy() do not actually free the memory that libpng -allocated for these structs, but just reset the data structures, so they -can be used instead of png_destroy_read_struct() and -png_destroy_write_struct() if you feel there is too much system overhead -allocating and freeing the png_struct for each image read. - -Setting the error callbacks via png_set_message_fn() before -png_read_init() as was suggested in libpng-0.88 is no longer supported -because this caused applications that do not use custom error functions -to fail if the png_ptr was not initialized to zero. It is still possible -to set the error callbacks AFTER png_read_init(), or to change them with -png_set_error_fn(), which is essentially the same function, but with a new -name to force compilation errors with applications that try to use the old -method. - -Starting with version 1.0.7, you can find out which version of the library -you are using at run-time: - - png_uint_32 libpng_vn = png_access_version_number(); - -The number libpng_vn is constructed from the major version, minor -version with leading zero, and release number with leading zero, -(e.g., libpng_vn for version 1.0.7 is 10007). - -You can also check which version of png.h you used when compiling your -application: - - png_uint_32 application_vn = PNG_LIBPNG_VER; - -.SH VIII. Y2K Compliance in libpng - -January 31, 2001 - -Since the PNG Development group is an ad-hoc body, we can't make -an official declaration. - -This is your unofficial assurance that libpng from version 0.71 and -upward through 1.0.9 are Y2K compliant. It is my belief that earlier -versions were also Y2K compliant. - -Libpng only has three year fields. One is a 2-byte unsigned integer that -will hold years up to 65535. The other two hold the date in text -format, and will hold years up to 9999. - -The integer is - "png_uint_16 year" in png_time_struct. - -The strings are - "png_charp time_buffer" in png_struct and - "near_time_buffer", which is a local character string in png.c. - -There are seven time-related functions: - - png_convert_to_rfc_1123() in png.c - (formerly png_convert_to_rfc_1152() in error) - png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c - png_convert_from_time_t() in pngwrite.c - png_get_tIME() in pngget.c - png_handle_tIME() in pngrutil.c, called in pngread.c - png_set_tIME() in pngset.c - png_write_tIME() in pngwutil.c, called in pngwrite.c - -All appear to handle dates properly in a Y2K environment. The -png_convert_from_time_t() function calls gmtime() to convert from system -clock time, which returns (year - 1900), which we properly convert to -the full 4-digit year. There is a possibility that applications using -libpng are not passing 4-digit years into the png_convert_to_rfc_1123() -function, or that they are incorrectly passing only a 2-digit year -instead of "year - 1900" into the png_convert_from_struct_tm() function, -but this is not under our control. The libpng documentation has always -stated that it works with 4-digit years, and the APIs have been -documented as such. - -The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned -integer to hold the year, and can hold years as large as 65535. - -zlib, upon which libpng depends, is also Y2K compliant. It contains -no date-related code. - - - Glenn Randers-Pehrson - libpng maintainer - PNG Development Group - -.SH NOTE - -Note about libpng version numbers: - -Due to various miscommunications, unforeseen code incompatibilities -and occasional factors outside the authors' control, version numbering -on the library has not always been consistent and straightforward. -The following table summarizes matters since version 0.89c, which was -the first widely used release: - - source png.h png.h shared-lib - version string int version - ------- ------ ----- ---------- - 0.89c ("1.0 beta 3") 0.89 89 1.0.89 - 0.90 ("1.0 beta 4") 0.90 90 0.90 [should have been 2.0.90] - 0.95 ("1.0 beta 5") 0.95 95 0.95 [should have been 2.0.95] - 0.96 ("1.0 beta 6") 0.96 96 0.96 [should have been 2.0.96] - 0.97b ("1.00.97 beta 7") 1.00.97 97 1.0.1 [should have been 2.0.97] - 0.97c 0.97 97 2.0.97 - 0.98 0.98 98 2.0.98 - 0.99 0.99 98 2.0.99 - 0.99a-m 0.99 99 2.0.99 - 1.00 1.00 100 2.1.0 [100 should be 10000] - 1.0.0 1.0.0 100 2.1.0 [100 should be 10000] - 1.0.1 1.0.1 10001 2.1.0 - 1.0.1a-e 1.0.1a-e 10002 2.1.0.1a-e - 1.0.2 1.0.2 10002 2.1.0.2 - 1.0.2a-b 1.0.2a-b 10003 2.1.0.2a-b - 1.0.3 1.0.3 10003 2.1.0.3 - 1.0.3a-d 1.0.3a-d 10004 2.1.0.3a-d - 1.0.4 1.0.4 10004 2.1.0.4 - 1.0.4a-f 1.0.4a-f 10005 2.1.0.4a-f - 1.0.5 (+ 2 patches) 1.0.5 10005 2.1.0.5 - 1.0.5a-d 1.0.5a-d 10006 2.1.0.5a-d - 1.0.5e-r 1.0.5e-r 10100 2.1.0.5e-r (not compatible) - 1.0.5s-v 1.0.5s-v 10006 2.1.0.5s-v (compatible) - 1.0.6 (+ 3 patches) 1.0.6 10006 2.1.0.6 - 1.0.6d 1.0.6d 10007 2.1.0.6d - 1.0.7 1.0.7 10007 2.1.0.7 (still compatible) - - Henceforth the source version will match the shared-library minor - and patch numbers; the shared-library major version number will be - used for changes in backward compatibility, as it is intended. The - PNG_PNGLIB_VER macro, which is not used within libpng but is available - for applications, is an unsigned integer of the form xyyzz corresponding - to the source version x.y.z (leading zeros in y and z). Beta versions - are given the previous public release number plus a letter or two. - -.SH "SEE ALSO" -libpngpf(3), png(5) -.LP -.IR libpng : -.IP -ftp://ftp.uu.net/graphics/png -http://www.libpng.org/pub/png - -.LP -.IR zlib : -.IP -(generally) at the same location as -.I libpng -or at -.br -ftp://ftp.uu.net/pub/archiving/zip/zlib -.br -ftp://ftp.info-zip.org/pub/infozip/zlib - -.LP -.IR PNG specification: RFC 2083 -.IP -(generally) at the same location as -.I libpng -or at -.br -ftp://ds.internic.net/rfc/rfc2083.txt -.br -or (as a W3C Recommendation) at -.br -http://www.w3.org/TR/REC-png.html - -.LP -In the case of any inconsistency between the PNG specification -and this library, the specification takes precedence. - -.SH AUTHORS -This man page: Glenn Randers-Pehrson - - -The contributing authors would like to thank all those who helped -with testing, bug fixes, and patience. This wouldn't have been -possible without all of you. - -Thanks to Frank J. T. Wojcik for helping with the documentation. - -Libpng version 1.0.9 - January 31, 2001: -Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc. -Currently maintained by Glenn Randers-Pehrson (randeg@alum.rpi.edu). - -Supported by the PNG development group -.br -(png-implement@ccrc.wustl.edu). - -.SH COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: - -(This copy of the libpng notices is provided for your convenience. In case of -any discrepancy between this copy and the notices in the file png.h that is -included in the libpng distribution, the latter shall prevail.) - -If you modify libpng you may insert additional notices immediately following -this sentence. - -libpng versions 1.0.7, July 1, 2000, through 1.0.9, January 31, 2001, are -Copyright (c) 2000 Glenn Randers-Pehrson, and are -distributed according to the same disclaimer and license as libpng-1.0.6 -with the following individuals added to the list of Contributing Authors - - Simon-Pierre Cadieux - Eric S. Raymond - Gilles Vollant - -and with the following additions to the disclaimer: - - There is no warranty against interference with your enjoyment of the - library or against infringement. There is no warranty that our - efforts or the library will fulfill any of your particular purposes - or needs. This library is provided with all faults, and the entire - risk of satisfactory quality, performance, accuracy, and effort is with - the user. - -libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are -Copyright (c) 1998, 1999 Glenn Randers-Pehrson -Distributed according to the same disclaimer and license as libpng-0.96, -with the following individuals added to the list of Contributing Authors: - - Tom Lane - Glenn Randers-Pehrson - Willem van Schaik - -libpng versions 0.89, June 1996, through 0.96, May 1997, are -Copyright (c) 1996, 1997 Andreas Dilger -Distributed according to the same disclaimer and license as libpng-0.88, -with the following individuals added to the list of Contributing Authors: - - John Bowler - Kevin Bracey - Sam Bushell - Magnus Holmgren - Greg Roelofs - Tom Tanner - -libpng versions 0.5, May 1995, through 0.88, January 1996, are -Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - -For the purposes of this copyright and license, "Contributing Authors" -is defined as the following set of individuals: - - Andreas Dilger - Dave Martindale - Guy Eric Schalnat - Paul Schmidt - Tim Wegner - -The PNG Reference Library is supplied "AS IS". The Contributing Authors -and Group 42, Inc. disclaim all warranties, expressed or implied, -including, without limitation, the warranties of merchantability and of -fitness for any purpose. The Contributing Authors and Group 42, Inc. -assume no liability for direct, indirect, incidental, special, exemplary, -or consequential damages, which may result from the use of the PNG -Reference Library, even if advised of the possibility of such damage. - -Permission is hereby granted to use, copy, modify, and distribute this -source code, or portions hereof, for any purpose, without fee, subject -to the following restrictions: - -1. The origin of this source code must not be misrepresented. - -2. Altered versions must be plainly marked as such and must not - be misrepresented as being the original source. - -3. This Copyright notice may not be removed or altered from any - source or altered source distribution. - -The Contributing Authors and Group 42, Inc. specifically permit, without -fee, and encourage the use of this source code as a component to -supporting the PNG file format in commercial products. If you use this -source code in a product, acknowledgment is not required but would be -appreciated. - - -A "png_get_copyright" function is available, for convenient use in "about" -boxes and the like: - - printf("%s",png_get_copyright(NULL)); - -Also, the PNG logo (in PNG format, of course) is supplied in the -files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). - -Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a -certification mark of the Open Source Initiative. - -Glenn Randers-Pehrson -randeg@alum.rpi.edu -January 31, 2001 - -.\" end of man page - diff --git a/libraries/libpng-1.0.9/libpng.txt b/libraries/libpng-1.0.9/libpng.txt deleted file mode 100644 index f070320..0000000 --- a/libraries/libpng-1.0.9/libpng.txt +++ /dev/null @@ -1,2736 +0,0 @@ -libpng.txt - A description on how to use and modify libpng - - libpng version 1.0.9 - January 31, 2001 - Updated and distributed by Glenn Randers-Pehrson - - Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson - For conditions of distribution and use, see copyright - notice in png.h. - - based on: - - libpng 1.0 beta 6 version 0.96 May 28, 1997 - Updated and distributed by Andreas Dilger - Copyright (c) 1996, 1997 Andreas Dilger - - libpng 1.0 beta 2 - version 0.88 January 26, 1996 - For conditions of distribution and use, see copyright - notice in png.h. Copyright (c) 1995, 1996 Guy Eric - Schalnat, Group 42, Inc. - - Updated/rewritten per request in the libpng FAQ - Copyright (c) 1995, 1996 Frank J. T. Wojcik - December 18, 1995 & January 20, 1996 - -I. Introduction - -This file describes how to use and modify the PNG reference library -(known as libpng) for your own use. There are five sections to this -file: introduction, structures, reading, writing, and modification and -configuration notes for various special platforms. In addition to this -file, example.c is a good starting point for using the library, as -it is heavily commented and should include everything most people -will need. We assume that libpng is already installed; see the -INSTALL file for instructions on how to install libpng. - -Libpng was written as a companion to the PNG specification, as a way -of reducing the amount of time and effort it takes to support the PNG -file format in application programs. - -The PNG-1.2 specification is available at -and at . - -The PNG-1.0 specification is available -as RFC 2083 and as a -W3C Recommendation . Some -additional chunks are described in the special-purpose public chunks -documents at . - -Other information -about PNG, and the latest version of libpng, can be found at the PNG home -page, -and at . - -Most users will not have to modify the library significantly; advanced -users may want to modify it more. All attempts were made to make it as -complete as possible, while keeping the code easy to understand. -Currently, this library only supports C. Support for other languages -is being considered. - -Libpng has been designed to handle multiple sessions at one time, -to be easily modifiable, to be portable to the vast majority of -machines (ANSI, K&R, 16-, 32-, and 64-bit) available, and to be easy -to use. The ultimate goal of libpng is to promote the acceptance of -the PNG file format in whatever way possible. While there is still -work to be done (see the TODO file), libpng should cover the -majority of the needs of its users. - -Libpng uses zlib for its compression and decompression of PNG files. -Further information about zlib, and the latest version of zlib, can -be found at the zlib home page, . -The zlib compression utility is a general purpose utility that is -useful for more than PNG files, and can be used without libpng. -See the documentation delivered with zlib for more details. -You can usually find the source files for the zlib utility wherever you -find the libpng source files. - -Libpng is thread safe, provided the threads are using different -instances of the structures. Each thread should have its own -png_struct and png_info instances, and thus its own image. -Libpng does not protect itself against two threads using the -same instance of a structure. - - -II. Structures - -There are two main structures that are important to libpng, png_struct -and png_info. The first, png_struct, is an internal structure that -will not, for the most part, be used by a user except as the first -variable passed to every libpng function call. - -The png_info structure is designed to provide information about the -PNG file. At one time, the fields of png_info were intended to be -directly accessible to the user. However, this tended to cause problems -with applications using dynamically loaded libraries, and as a result -a set of interface functions for png_info (the png_get_*() and png_set_*() -functions) was developed. The fields of png_info are still available for -older applications, but it is suggested that applications use the new -interfaces if at all possible. - -Applications that do make direct access to the members of png_struct (except -for png_ptr->jmpbuf) must be recompiled whenever the library is updated, -and applications that make direct access to the members of png_info must -be recompiled if they were compiled or loaded with libpng version 1.0.6, -in which the members were in a different order. In version 1.0.7, the -members of the png_info structure reverted to the old order, as they were -in versions 0.97c through 1.0.5. Starting with version 2.0.0, both -structures are going to be hidden, and the contents of the structures will -only be accessible through the png_get/png_set functions. - -The png.h header file is an invaluable reference for programming with libpng. -And while I'm on the topic, make sure you include the libpng header file: - -#include - -III. Reading - -We'll now walk you through the possible functions to call when reading -in a PNG file sequentially, briefly explaining the syntax and purpose -of each one. See example.c and png.h for more detail. While -progressive reading is covered in the next section, you will still -need some of the functions discussed in this section to read a PNG -file. - -Setup - -You will want to do the I/O initialization(*) before you get into libpng, -so if it doesn't work, you don't have much to undo. Of course, you -will also want to insure that you are, in fact, dealing with a PNG -file. Libpng provides a simple check to see if a file is a PNG file. -To use it, pass in the first 1 to 8 bytes of the file to the function -png_sig_cmp(), and it will return 0 if the bytes match the corresponding -bytes of the PNG signature, or nonzero otherwise. Of course, the more bytes -you pass in, the greater the accuracy of the prediction. - -If you are intending to keep the file pointer open for use in libpng, -you must ensure you don't read more than 8 bytes from the beginning -of the file, and you also have to make a call to png_set_sig_bytes_read() -with the number of bytes you read from the beginning. Libpng will -then only check the bytes (if any) that your program didn't read. - -(*): If you are not using the standard I/O functions, you will need -to replace them with custom functions. See the discussion under -Customizing libpng. - - - FILE *fp = fopen(file_name, "rb"); - if (!fp) - { - return (ERROR); - } - fread(header, 1, number, fp); - is_png = !png_sig_cmp(header, 0, number); - if (!is_png) - { - return (NOT_PNG); - } - - -Next, png_struct and png_info need to be allocated and initialized. In -order to ensure that the size of these structures is correct even with a -dynamically linked libpng, there are functions to initialize and -allocate the structures. We also pass the library version, optional -pointers to error handling functions, and a pointer to a data struct for -use by the error functions, if necessary (the pointer and functions can -be NULL if the default error handlers are to be used). See the section -on Changes to Libpng below regarding the old initialization functions. -The structure allocation functions quietly return NULL if they fail to -create the structure, so your application should check for that. - - png_structp png_ptr = png_create_read_struct - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn); - if (!png_ptr) - return (ERROR); - - png_infop info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) - { - png_destroy_read_struct(&png_ptr, - (png_infopp)NULL, (png_infopp)NULL); - return (ERROR); - } - - png_infop end_info = png_create_info_struct(png_ptr); - if (!end_info) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); - } - -If you want to use your own memory allocation routines, -define PNG_USER_MEM_SUPPORTED and use -png_create_read_struct_2() instead of png_create_read_struct(): - - png_structp png_ptr = png_create_read_struct_2 - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn, (png_voidp) - user_mem_ptr, user_malloc_fn, user_free_fn); - -The error handling routines passed to png_create_read_struct() -and the memory alloc/free routines passed to png_create_struct_2() -are only necessary if you are not using the libpng supplied error -handling and memory alloc/free functions. - -When libpng encounters an error, it expects to longjmp back -to your routine. Therefore, you will need to call setjmp and pass -your png_jmpbuf(png_ptr). If you read the file from different -routines, you will need to update the jmpbuf field every time you enter -a new routine that will call a png_*() function. - -See your documentation of setjmp/longjmp for your compiler for more -information on setjmp/longjmp. See the discussion on libpng error -handling in the Customizing Libpng section below for more information -on the libpng error handling. If an error occurs, and libpng longjmp's -back to your setjmp, you will want to call png_destroy_read_struct() to -free any memory. - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - &end_info); - fclose(fp); - return (ERROR); - } - -If you would rather avoid the complexity of setjmp/longjmp issues, -you can compile libpng with PNG_SETJMP_NOT_SUPPORTED, in which case -errors will result in a call to PNG_ABORT() which defaults to abort(). - -Now you need to set up the input code. The default for libpng is to -use the C function fread(). If you use this, you will need to pass a -valid FILE * in the function png_init_io(). Be sure that the file is -opened in binary mode. If you wish to handle reading data in another -way, you need not call the png_init_io() function, but you must then -implement the libpng I/O methods discussed in the Customizing Libpng -section below. - - png_init_io(png_ptr, fp); - -If you had previously opened the file and read any of the signature from -the beginning in order to see if this was a PNG file, you need to let -libpng know that there are some bytes missing from the start of the file. - - png_set_sig_bytes(png_ptr, number); - -Setting up callback code - -You can set up a callback function to handle any unknown chunks in the -input stream. You must supply the function - - read_chunk_callback(png_ptr ptr, - png_unknown_chunkp chunk); - { - /* The unknown chunk structure contains your - chunk data: */ - png_byte name[5]; - png_byte *data; - png_size_t size; - /* Note that libpng has already taken care of the - CRC handling */ - - /* put your code here. Return one of the following: */ - - return (-n); /* chunk had an error */ - return (0); /* did not recognize */ - return (n); /* success */ - } - -(You can give your function another name that you like instead of -"read_chunk_callback") - -To inform libpng about your function, use - - png_set_read_user_chunk_fn(png_ptr, user_chunk_ptr, - read_chunk_callback); - -This names not only the callback function, but also a user pointer that -you can retrieve with - - png_get_user_chunk_ptr(png_ptr); - -At this point, you can set up a callback function that will be -called after each row has been read, which you can use to control -a progress meter or the like. It's demonstrated in pngtest.c. -You must supply a function - - void read_row_callback(png_ptr ptr, png_uint_32 row, int pass); - { - /* put your code here */ - } - -(You can give it another name that you like instead of "read_row_callback") - -To inform libpng about your function, use - - png_set_read_status_fn(png_ptr, read_row_callback); - -Unknown-chunk handling - -Now you get to set the way the library processes unknown chunks in the -input PNG stream. Both known and unknown chunks will be read. Normal -behavior is that known chunks will be parsed into information in -various info_ptr members; unknown chunks will be discarded. To change -this, you can call: - - png_set_keep_unknown_chunks(png_ptr, info_ptr, keep, - chunk_list, num_chunks); - keep - 0: do not keep - 1: keep only if safe-to-copy - 2: keep even if unsafe-to-copy - chunk_list - list of chunks affected (a byte string, - five bytes per chunk, NULL or '\0' if - num_chunks is 0) - num_chunks - number of chunks affected; if 0, all - unknown chunks are affected - -Unknown chunks declared in this way will be saved as raw data onto a -list of png_unknown_chunk structures. If a chunk that is normally -known to libpng is named in the list, it will be handled as unknown, -according to the "keep" directive. If a chunk is named in successive -instances of png_set_keep_unknown_chunks(), the final instance will -take precedence. - -The high-level read interface - -At this point there are two ways to proceed; through the high-level -read interface, or through a sequence of low-level read operations. -You can use the high-level interface if (a) you are willing to read -the entire image into memory, and (b) the input transformations -you want to do are limited to the following set: - - PNG_TRANSFORM_IDENTITY No transformation - PNG_TRANSFORM_STRIP_16 Strip 16-bit samples to 8 bits - PNG_TRANSFORM_STRIP_ALPHA Discard the alpha channel - PNG_TRANSFORM_PACKING Expand 1, 2 and 4-bit samples to bytes - PNG_TRANSFORM_PACKSWAP Change order of packed pixels to LSB first - PNG_TRANSFORM_EXPAND Perform set_expand() - PNG_TRANSFORM_INVERT_MONO Invert monochrome images - PNG_TRANSFORM_SHIFT Normalize pixels to the sBIT depth - PNG_TRANSFORM_BGR Flip RGB to BGR, RGBA to BGRA - PNG_TRANSFORM_SWAP_ALPHA Flip RGBA to ARGB or GA to AG - PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity to transparency - PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples - -(This excludes setting a background color, doing gamma transformation, -dithering, and setting filler.) If this is the case, simply do this: - - png_read_png(png_ptr, info_ptr, png_transforms, NULL) - -where png_transforms is an integer containing the logical OR of -some set of transformation flags. This call is equivalent to png_read_info(), -followed the set of transformations indicated by the transform mask, -then png_read_image(), and finally png_read_end(). - -(The final parameter of this call is not yet used. Someday it might point -to transformation parameters required by some future input transform.) - -After you have called png_read_png(), you can retrieve the image data -with - - row_pointers = png_get_rows(png_ptr, info_ptr); - -where row_pointers is an array of pointers to the pixel data for each row: - - png_bytep row_pointers[height]; - -If you know your image size and pixel size ahead of time, you can allocate -row_pointers prior to calling png_read_png() with - - row_pointers = png_malloc(png_ptr, height*sizeof(png_bytep)); - for (int i=0; i) and -png_get_(png_ptr, info_ptr, ...) functions return non-zero if the -data has been read, or zero if it is missing. The parameters to the -png_get_ are set directly if they are simple data types, or a pointer -into the info_ptr is returned for any complex types. - - png_get_PLTE(png_ptr, info_ptr, &palette, - &num_palette); - palette - the palette for the file - (array of png_color) - num_palette - number of entries in the palette - - png_get_gAMA(png_ptr, info_ptr, &gamma); - gamma - the gamma the file is written - at (PNG_INFO_gAMA) - - png_get_sRGB(png_ptr, info_ptr, &srgb_intent); - srgb_intent - the rendering intent (PNG_INFO_sRGB) - The presence of the sRGB chunk - means that the pixel data is in the - sRGB color space. This chunk also - implies specific values of gAMA and - cHRM. - - png_get_iCCP(png_ptr, info_ptr, &name, &compression_type, - &profile, &proflen); - name - The profile name. - compression - The compression type; always PNG_COMPRESSION_TYPE_BASE - for PNG 1.0. You may give NULL to this argument - to ignore it. - profile - International Color Consortium color profile - data. May contain NULs. - proflen - length of profile data in bytes. - - png_get_sBIT(png_ptr, info_ptr, &sig_bit); - sig_bit - the number of significant bits for - (PNG_INFO_sBIT) each of the gray, - red, green, and blue channels, - whichever are appropriate for the - given color type (png_color_16) - - png_get_tRNS(png_ptr, info_ptr, &trans, &num_trans, - &trans_values); - trans - array of transparent entries for - palette (PNG_INFO_tRNS) - trans_values - graylevel or color sample values of - the single transparent color for - non-paletted images (PNG_INFO_tRNS) - num_trans - number of transparent entries - (PNG_INFO_tRNS) - - png_get_hIST(png_ptr, info_ptr, &hist); - (PNG_INFO_hIST) - hist - histogram of palette (array of - png_uint_16) - - png_get_tIME(png_ptr, info_ptr, &mod_time); - mod_time - time image was last modified - (PNG_VALID_tIME) - - png_get_bKGD(png_ptr, info_ptr, &background); - background - background color (PNG_VALID_bKGD) - valid 16-bit red, green and blue - values, regardless of color_type - - num_comments = png_get_text(png_ptr, info_ptr, - &text_ptr, &num_text); - num_comments - number of comments - text_ptr - array of png_text holding image - comments - text_ptr[i].compression - type of compression used - on "text" PNG_TEXT_COMPRESSION_NONE - PNG_TEXT_COMPRESSION_zTXt - PNG_ITXT_COMPRESSION_NONE - PNG_ITXT_COMPRESSION_zTXt - text_ptr[i].key - keyword for comment. Must contain - 1-79 characters. - text_ptr[i].text - text comments for current - keyword. Can be empty. - text_ptr[i].text_length - length of text string, - after decompression, 0 for iTXt - text_ptr[i].itxt_length - length of itxt string, - after decompression, 0 for tEXt/zTXt - text_ptr[i].lang - language of comment (empty - string for unknown). - text_ptr[i].translated_keyword - keyword in UTF-8 - (empty string for unknown). - num_text - number of comments (same as num_comments; - you can put NULL here to avoid the duplication) - Note while png_set_text() will accept text, language, and - translated keywords that can be NULL pointers, the structure - returned by png_get_text will always contain regular - zero-terminated C strings. They might be empty strings but - they will never be NULL pointers. - - num_spalettes = png_get_sPLT(png_ptr, info_ptr, &palette_ptr); - palette_ptr - array of palette structures holding - contents of one or more sPLT chunks read. - num_spalettes - number of sPLT chunks read. - - png_get_oFFs(png_ptr, info_ptr, &offset_x, &offset_y, - &unit_type); - offset_x - positive offset from the left edge - of the screen - offset_y - positive offset from the top edge - of the screen - unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER - - png_get_pHYs(png_ptr, info_ptr, &res_x, &res_y, - &unit_type); - res_x - pixels/unit physical resolution in - x direction - res_y - pixels/unit physical resolution in - x direction - unit_type - PNG_RESOLUTION_UNKNOWN, - PNG_RESOLUTION_METER - - png_get_sCAL(png_ptr, info_ptr, &unit, &width, &height) - unit - physical scale units (an integer) - width - width of a pixel in physical scale units - height - height of a pixel in physical scale units - (width and height are doubles) - - png_get_sCAL_s(png_ptr, info_ptr, &unit, &width, &height) - unit - physical scale units (an integer) - width - width of a pixel in physical scale units - height - height of a pixel in physical scale units - (width and height are strings like "2.54") - - num_unknown_chunks = png_get_unknown_chunks(png_ptr, info_ptr, - &unknowns) - unknowns - array of png_unknown_chunk structures holding - unknown chunks - unknowns[i].name - name of unknown chunk - unknowns[i].data - data of unknown chunk - unknowns[i].size - size of unknown chunk's data - unknowns[i].location - position of chunk in file - - The value of "i" corresponds to the order in which the chunks were read - from the PNG file or inserted with the png_set_unknown_chunks() function. - -The data from the pHYs chunk can be retrieved in several convenient -forms: - - res_x = png_get_x_pixels_per_meter(png_ptr, - info_ptr) - res_y = png_get_y_pixels_per_meter(png_ptr, - info_ptr) - res_x_and_y = png_get_pixels_per_meter(png_ptr, - info_ptr) - res_x = png_get_x_pixels_per_inch(png_ptr, - info_ptr) - res_y = png_get_y_pixels_per_inch(png_ptr, - info_ptr) - res_x_and_y = png_get_pixels_per_inch(png_ptr, - info_ptr) - aspect_ratio = png_get_pixel_aspect_ratio(png_ptr, - info_ptr) - - (Each of these returns 0 [signifying "unknown"] if - the data is not present or if res_x is 0; - res_x_and_y is 0 if res_x != res_y) - -The data from the oFFs chunk can be retrieved in several convenient -forms: - - x_offset = png_get_x_offset_microns(png_ptr, info_ptr); - y_offset = png_get_y_offset_microns(png_ptr, info_ptr); - x_offset = png_get_x_offset_inches(png_ptr, info_ptr); - y_offset = png_get_y_offset_inches(png_ptr, info_ptr); - - (Each of these returns 0 [signifying "unknown" if both - x and y are 0] if the data is not present or if the chunk - is present but the unit is the pixel) - -For more information, see the png_info definition in png.h and the -PNG specification for chunk contents. Be careful with trusting -rowbytes, as some of the transformations could increase the space -needed to hold a row (expand, filler, gray_to_rgb, etc.). -See png_read_update_info(), below. - -A quick word about text_ptr and num_text. PNG stores comments in -keyword/text pairs, one pair per chunk, with no limit on the number -of text chunks, and a 2^31 byte limit on their size. While there are -suggested keywords, there is no requirement to restrict the use to these -strings. It is strongly suggested that keywords and text be sensible -to humans (that's the point), so don't use abbreviations. Non-printing -symbols are not allowed. See the PNG specification for more details. -There is also no requirement to have text after the keyword. - -Keywords should be limited to 79 Latin-1 characters without leading or -trailing spaces, but non-consecutive spaces are allowed within the -keyword. It is possible to have the same keyword any number of times. -The text_ptr is an array of png_text structures, each holding a -pointer to a language string, a pointer to a keyword and a pointer to -a text string. The text string, language code, and translated -keyword may be empty or NULL pointers. The keyword/text -pairs are put into the array in the order that they are received. -However, some or all of the text chunks may be after the image, so, to -make sure you have read all the text chunks, don't mess with these -until after you read the stuff after the image. This will be -mentioned again below in the discussion that goes with png_read_end(). - -Input transformations - -After you've read the header information, you can set up the library -to handle any special transformations of the image data. The various -ways to transform the data will be described in the order that they -should occur. This is important, as some of these change the color -type and/or bit depth of the data, and some others only work on -certain color types and bit depths. Even though each transformation -checks to see if it has data that it can do something with, you should -make sure to only enable a transformation if it will be valid for the -data. For example, don't swap red and blue on grayscale data. - -The colors used for the background and transparency values should be -supplied in the same format/depth as the current image data. They -are stored in the same format/depth as the image data in a bKGD or tRNS -chunk, so this is what libpng expects for this data. The colors are -transformed to keep in sync with the image data when an application -calls the png_read_update_info() routine (see below). - -Data will be decoded into the supplied row buffers packed into bytes -unless the library has been told to transform it into another format. -For example, 4 bit/pixel paletted or grayscale data will be returned -2 pixels/byte with the leftmost pixel in the high-order bits of the -byte, unless png_set_packing() is called. 8-bit RGB data will be stored -in RGB RGB RGB format unless png_set_filler() is called to insert filler -bytes, either before or after each RGB triplet. 16-bit RGB data will -be returned RRGGBB RRGGBB, with the most significant byte of the color -value first, unless png_set_strip_16() is called to transform it to -regular RGB RGB triplets, or png_set_filler() is called to insert -filler bytes, either before or after each RRGGBB triplet. Similarly, -8-bit or 16-bit grayscale data can be modified with png_set_filler() -or png_set_strip_16(). - -The following code transforms grayscale images of less than 8 to 8 bits, -changes paletted images to RGB, and adds a full alpha channel if there is -transparency information in a tRNS chunk. This is most useful on -grayscale images with bit depths of 2 or 4 or if there is a multiple-image -viewing application that wishes to treat all images in the same way. - - if (color_type == PNG_COLOR_TYPE_PALETTE) - png_set_palette_to_rgb(png_ptr); - - if (color_type == PNG_COLOR_TYPE_GRAY && - bit_depth < 8) png_set_gray_1_2_4_to_8(png_ptr); - - if (png_get_valid(png_ptr, info_ptr, - PNG_INFO_tRNS)) png_set_tRNS_to_alpha(png_ptr); - -These three functions are actually aliases for png_set_expand(), added -in libpng version 1.0.4, with the function names expanded to improve code -readability. In some future version they may actually do different -things. - -PNG can have files with 16 bits per channel. If you only can handle -8 bits per channel, this will strip the pixels down to 8 bit. - - if (bit_depth == 16) - png_set_strip_16(png_ptr); - -If, for some reason, you don't need the alpha channel on an image, -and you want to remove it rather than combining it with the background -(but the image author certainly had in mind that you *would* combine -it with the background, so that's what you should probably do): - - if (color_type & PNG_COLOR_MASK_ALPHA) - png_set_strip_alpha(png_ptr); - -In PNG files, the alpha channel in an image -is the level of opacity. If you need the alpha channel in an image to -be the level of transparency instead of opacity, you can invert the -alpha channel (or the tRNS chunk data) after it's read, so that 0 is -fully opaque and 255 (in 8-bit or paletted images) or 65535 (in 16-bit -images) is fully transparent, with - - png_set_invert_alpha(png_ptr); - -PNG files pack pixels of bit depths 1, 2, and 4 into bytes as small as -they can, resulting in, for example, 8 pixels per byte for 1 bit -files. This code expands to 1 pixel per byte without changing the -values of the pixels: - - if (bit_depth < 8) - png_set_packing(png_ptr); - -PNG files have possible bit depths of 1, 2, 4, 8, and 16. All pixels -stored in a PNG image have been "scaled" or "shifted" up to the next -higher possible bit depth (e.g. from 5 bits/sample in the range [0,31] to -8 bits/sample in the range [0, 255]). However, it is also possible to -convert the PNG pixel data back to the original bit depth of the image. -This call reduces the pixels back down to the original bit depth: - - png_color_16p sig_bit; - - if (png_get_sBIT(png_ptr, info_ptr, &sig_bit)) - png_set_shift(png_ptr, sig_bit); - -PNG files store 3-color pixels in red, green, blue order. This code -changes the storage of the pixels to blue, green, red: - - if (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_bgr(png_ptr); - -PNG files store RGB pixels packed into 3 bytes. This code expands them -into 4 bytes for windowing systems that need them in this format: - - if (bit_depth == 8 && color_type == - PNG_COLOR_TYPE_RGB) png_set_filler(png_ptr, - filler, PNG_FILLER_BEFORE); - -where "filler" is the 8 or 16-bit number to fill with, and the location is -either PNG_FILLER_BEFORE or PNG_FILLER_AFTER, depending upon whether -you want the filler before the RGB or after. This transformation -does not affect images that already have full alpha channels. - -If you are reading an image with an alpha channel, and you need the -data as ARGB instead of the normal PNG format RGBA: - - if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_swap_alpha(png_ptr); - -For some uses, you may want a grayscale image to be represented as -RGB. This code will do that conversion: - - if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb(png_ptr); - -Conversely, you can convert an RGB or RGBA image to grayscale or grayscale -with alpha. - - if (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) - png_set_rgb_to_gray_fixed(png_ptr, error_action, - int red_weight, int green_weight); - - error_action = 1: silently do the conversion - error_action = 2: issue a warning if the original - image has any pixel where - red != green or red != blue - error_action = 3: issue an error and abort the - conversion if the original - image has any pixel where - red != green or red != blue - - red_weight: weight of red component times 100000 - green_weight: weight of green component times 100000 - If either weight is negative, default - weights (21268, 71514) are used. - -If you have set error_action = 1 or 2, you can -later check whether the image really was gray, after processing -the image rows, with the png_get_rgb_to_gray_status(png_ptr) function. -It will return a png_byte that is zero if the image was gray or -1 if there were any non-gray pixels. bKGD and sBIT data -will be silently converted to grayscale, using the green channel -data, regardless of the error_action setting. - -With red_weight+green_weight<=100000, -the normalized graylevel is computed: - - int rw = red_weight * 65536; - int gw = green_weight * 65536; - int bw = 65536 - (rw + gw); - gray = (rw*red + gw*green + bw*blue)/65536; - -The default values approximate those recommended in the Charles -Poynton's Color FAQ, -Copyright (c) 1998-01-04 Charles Poynton poynton@inforamp.net - - Y = 0.212671 * R + 0.715160 * G + 0.072169 * B - -Libpng approximates this with - - Y = 0.21268 * R + 0.7151 * G + 0.07217 * B - -which can be expressed with integers as - - Y = (6969 * R + 23434 * G + 2365 * B)/32768 - -The calculation is done in a linear colorspace, if the image gamma -is known. - -If you have a grayscale and you are using png_set_expand_depth() or -png_set_expand() to change to -a higher bit-depth, you must either supply the background color as a gray -value at the original file bit-depth (need_expand = 1) or else supply the -background color as an RGB triplet at the final, expanded bit depth -(need_expand = 0). Similarly, if you are reading a paletted image, you -must either supply the background color as a palette index (need_expand = 1) -or as an RGB triplet that may or may not be in the palette (need_expand = 0). - - png_color_16 my_background; - png_color_16p image_background; - - if (png_get_bKGD(png_ptr, info_ptr, &image_background)) - png_set_background(png_ptr, image_background, - PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); - else - png_set_background(png_ptr, &my_background, - PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); - -The png_set_background() function tells libpng to composite images -with alpha or simple transparency against the supplied background -color. If the PNG file contains a bKGD chunk (PNG_INFO_bKGD valid), -you may use this color, or supply another color more suitable for -the current display (e.g., the background color from a web page). You -need to tell libpng whether the color is in the gamma space of the -display (PNG_BACKGROUND_GAMMA_SCREEN for colors you supply), the file -(PNG_BACKGROUND_GAMMA_FILE for colors from the bKGD chunk), or one -that is neither of these gammas (PNG_BACKGROUND_GAMMA_UNIQUE - I don't -know why anyone would use this, but it's here). - -To properly display PNG images on any kind of system, the application needs -to know what the display gamma is. Ideally, the user will know this, and -the application will allow them to set it. One method of allowing the user -to set the display gamma separately for each system is to check for a -SCREEN_GAMMA or DISPLAY_GAMMA environment variable, which will hopefully be -correctly set. - -Note that display_gamma is the overall gamma correction required to produce -pleasing results, which depends on the lighting conditions in the surrounding -environment. In a dim or brightly lit room, no compensation other than -the physical gamma exponent of the monitor is needed, while in a dark room -a slightly smaller exponent is better. - - double gamma, screen_gamma; - - if (/* We have a user-defined screen - gamma value */) - { - screen_gamma = user_defined_screen_gamma; - } - /* One way that applications can share the same - screen gamma value */ - else if ((gamma_str = getenv("SCREEN_GAMMA")) - != NULL) - { - screen_gamma = (double)atof(gamma_str); - } - /* If we don't have another value */ - else - { - screen_gamma = 2.2; /* A good guess for a - PC monitor in a bright office or a dim room */ - screen_gamma = 2.0; /* A good guess for a - PC monitor in a dark room */ - screen_gamma = 1.7 or 1.0; /* A good - guess for Mac systems */ - } - -The png_set_gamma() function handles gamma transformations of the data. -Pass both the file gamma and the current screen_gamma. If the file does -not have a gamma value, you can pass one anyway if you have an idea what -it is (usually 0.45455 is a good guess for GIF images on PCs). Note -that file gammas are inverted from screen gammas. See the discussions -on gamma in the PNG specification for an excellent description of what -gamma is, and why all applications should support it. It is strongly -recommended that PNG viewers support gamma correction. - - if (png_get_gAMA(png_ptr, info_ptr, &gamma)) - png_set_gamma(png_ptr, screen_gamma, gamma); - else - png_set_gamma(png_ptr, screen_gamma, 0.45455); - -If you need to reduce an RGB file to a paletted file, or if a paletted -file has more entries then will fit on your screen, png_set_dither() -will do that. Note that this is a simple match dither that merely -finds the closest color available. This should work fairly well with -optimized palettes, and fairly badly with linear color cubes. If you -pass a palette that is larger then maximum_colors, the file will -reduce the number of colors in the palette so it will fit into -maximum_colors. If there is a histogram, it will use it to make -more intelligent choices when reducing the palette. If there is no -histogram, it may not do as good a job. - - if (color_type & PNG_COLOR_MASK_COLOR) - { - if (png_get_valid(png_ptr, info_ptr, - PNG_INFO_PLTE)) - { - png_uint_16p histogram; - - png_get_hIST(png_ptr, info_ptr, - &histogram); - png_set_dither(png_ptr, palette, num_palette, - max_screen_colors, histogram, 1); - } - else - { - png_color std_color_cube[MAX_SCREEN_COLORS] = - { ... colors ... }; - - png_set_dither(png_ptr, std_color_cube, - MAX_SCREEN_COLORS, MAX_SCREEN_COLORS, - NULL,0); - } - } - -PNG files describe monochrome as black being zero and white being one. -The following code will reverse this (make black be one and white be -zero): - - if (bit_depth == 1 && color_type == PNG_COLOR_GRAY) - png_set_invert_mono(png_ptr); - -PNG files store 16 bit pixels in network byte order (big-endian, -ie. most significant bits first). This code changes the storage to the -other way (little-endian, i.e. least significant bits first, the -way PCs store them): - - if (bit_depth == 16) - png_set_swap(png_ptr); - -If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you -need to change the order the pixels are packed into bytes, you can use: - - if (bit_depth < 8) - png_set_packswap(png_ptr); - -Finally, you can write your own transformation function if none of -the existing ones meets your needs. This is done by setting a callback -with - - png_set_read_user_transform_fn(png_ptr, - read_transform_fn); - -You must supply the function - - void read_transform_fn(png_ptr ptr, row_info_ptr - row_info, png_bytep data) - -See pngtest.c for a working example. Your function will be called -after all of the other transformations have been processed. - -You can also set up a pointer to a user structure for use by your -callback function, and you can inform libpng that your transform -function will change the number of channels or bit depth with the -function - - png_set_user_transform_info(png_ptr, user_ptr, - user_depth, user_channels); - -The user's application, not libpng, is responsible for allocating and -freeing any memory required for the user structure. - -You can retrieve the pointer via the function -png_get_user_transform_ptr(). For example: - - voidp read_user_transform_ptr = - png_get_user_transform_ptr(png_ptr); - -The last thing to handle is interlacing; this is covered in detail below, -but you must call the function here if you want libpng to handle expansion -of the interlaced image. - - number_of_passes = png_set_interlace_handling(png_ptr); - -After setting the transformations, libpng can update your png_info -structure to reflect any transformations you've requested with this -call. This is most useful to update the info structure's rowbytes -field so you can use it to allocate your image memory. This function -will also update your palette with the correct screen_gamma and -background if these have been given with the calls above. - - png_read_update_info(png_ptr, info_ptr); - -After you call png_read_update_info(), you can allocate any -memory you need to hold the image. The row data is simply -raw byte data for all forms of images. As the actual allocation -varies among applications, no example will be given. If you -are allocating one large chunk, you will need to build an -array of pointers to each row, as it will be needed for some -of the functions below. - -Reading image data - -After you've allocated memory, you can read the image data. -The simplest way to do this is in one function call. If you are -allocating enough memory to hold the whole image, you can just -call png_read_image() and libpng will read in all the image data -and put it in the memory area supplied. You will need to pass in -an array of pointers to each row. - -This function automatically handles interlacing, so you don't need -to call png_set_interlace_handling() or call this function multiple -times, or any of that other stuff necessary with png_read_rows(). - - png_read_image(png_ptr, row_pointers); - -where row_pointers is: - - png_bytep row_pointers[height]; - -You can point to void or char or whatever you use for pixels. - -If you don't want to read in the whole image at once, you can -use png_read_rows() instead. If there is no interlacing (check -interlace_type == PNG_INTERLACE_NONE), this is simple: - - png_read_rows(png_ptr, row_pointers, NULL, - number_of_rows); - -where row_pointers is the same as in the png_read_image() call. - -If you are doing this just one row at a time, you can do this with -a single row_pointer instead of an array of row_pointers: - - png_bytep row_pointer = row; - png_read_row(png_ptr, row_pointer, NULL); - -If the file is interlaced (interlace_type != 0 in the IHDR chunk), things -get somewhat harder. The only current (PNG Specification version 1.2) -interlacing type for PNG is (interlace_type == PNG_INTERLACE_ADAM7) -is a somewhat complicated 2D interlace scheme, known as Adam7, that -breaks down an image into seven smaller images of varying size, based -on an 8x8 grid. - -libpng can fill out those images or it can give them to you "as is". -If you want them filled out, there are two ways to do that. The one -mentioned in the PNG specification is to expand each pixel to cover -those pixels that have not been read yet (the "rectangle" method). -This results in a blocky image for the first pass, which gradually -smooths out as more pixels are read. The other method is the "sparkle" -method, where pixels are drawn only in their final locations, with the -rest of the image remaining whatever colors they were initialized to -before the start of the read. The first method usually looks better, -but tends to be slower, as there are more pixels to put in the rows. - -If you don't want libpng to handle the interlacing details, just call -png_read_rows() seven times to read in all seven images. Each of the -images is a valid image by itself, or they can all be combined on an -8x8 grid to form a single image (although if you intend to combine them -you would be far better off using the libpng interlace handling). - -The first pass will return an image 1/8 as wide as the entire image -(every 8th column starting in column 0) and 1/8 as high as the original -(every 8th row starting in row 0), the second will be 1/8 as wide -(starting in column 4) and 1/8 as high (also starting in row 0). The -third pass will be 1/4 as wide (every 4th pixel starting in column 0) and -1/8 as high (every 8th row starting in row 4), and the fourth pass will -be 1/4 as wide and 1/4 as high (every 4th column starting in column 2, -and every 4th row starting in row 0). The fifth pass will return an -image 1/2 as wide, and 1/4 as high (starting at column 0 and row 2), -while the sixth pass will be 1/2 as wide and 1/2 as high as the original -(starting in column 1 and row 0). The seventh and final pass will be as -wide as the original, and 1/2 as high, containing all of the odd -numbered scanlines. Phew! - -If you want libpng to expand the images, call this before calling -png_start_read_image() or png_read_update_info(): - - if (interlace_type == PNG_INTERLACE_ADAM7) - number_of_passes - = png_set_interlace_handling(png_ptr); - -This will return the number of passes needed. Currently, this -is seven, but may change if another interlace type is added. -This function can be called even if the file is not interlaced, -where it will return one pass. - -If you are not going to display the image after each pass, but are -going to wait until the entire image is read in, use the sparkle -effect. This effect is faster and the end result of either method -is exactly the same. If you are planning on displaying the image -after each pass, the "rectangle" effect is generally considered the -better looking one. - -If you only want the "sparkle" effect, just call png_read_rows() as -normal, with the third parameter NULL. Make sure you make pass over -the image number_of_passes times, and you don't change the data in the -rows between calls. You can change the locations of the data, just -not the data. Each pass only writes the pixels appropriate for that -pass, and assumes the data from previous passes is still valid. - - png_read_rows(png_ptr, row_pointers, NULL, - number_of_rows); - -If you only want the first effect (the rectangles), do the same as -before except pass the row buffer in the third parameter, and leave -the second parameter NULL. - - png_read_rows(png_ptr, NULL, row_pointers, - number_of_rows); - -Finishing a sequential read - -After you are finished reading the image through either the high- or -low-level interfaces, you can finish reading the file. If you are -interested in comments or time, which may be stored either before or -after the image data, you should pass the separate png_info struct if -you want to keep the comments from before and after the image -separate. If you are not interested, you can pass NULL. - - png_read_end(png_ptr, end_info); - -When you are done, you can free all memory allocated by libpng like this: - - png_destroy_read_struct(&png_ptr, &info_ptr, - &end_info); - -It is also possible to individually free the info_ptr members that -point to libpng-allocated storage with the following function: - - png_free_data(png_ptr, info_ptr, mask, n) - mask - identifies data to be freed, a mask - containing the logical OR of one or - more of - PNG_FREE_PLTE, PNG_FREE_TRNS, - PNG_FREE_HIST, PNG_FREE_ICCP, - PNG_FREE_PCAL, PNG_FREE_ROWS, - PNG_FREE_SCAL, PNG_FREE_SPLT, - PNG_FREE_TEXT, PNG_FREE_UNKN, - or simply PNG_FREE_ALL - n - sequence number of item to be freed - (-1 for all items) - -This function may be safely called when the relevant storage has -already been freed, or has not yet been allocated, or was allocated -by the user and not by libpng, and will in those -cases do nothing. The "n" parameter is ignored if only one item -of the selected data type, such as PLTE, is allowed. If "n" is not --1, and multiple items are allowed for the data type identified in -the mask, such as text or sPLT, only the n'th item is freed. - -The default behavior is only to free data that was allocated internally -by libpng. This can be changed, so that libpng will not free the data, -or so that it will free data that was allocated by the user with png_malloc() -or png_zalloc() and passed in via a png_set_*() function, with - - png_data_freer(png_ptr, info_ptr, freer, mask) - mask - which data elements are affected - same choices as in png_free_data() - freer - one of - PNG_DESTROY_WILL_FREE_DATA - PNG_SET_WILL_FREE_DATA - PNG_USER_WILL_FREE_DATA - -This function only affects data that has already been allocated. -You can call this function after reading the PNG data but before calling -any png_set_*() functions, to control whether the user or the png_set_*() -function is responsible for freeing any existing data that might be present, -and again after the png_set_*() functions to control whether the user -or png_destroy_*() is supposed to free the data. When the user assumes -responsibility for libpng-allocated data, the application must use -png_free() to free it, and when the user transfers responsibility to libpng -for data that the user has allocated, the user must have used png_malloc() -or png_zalloc() to allocate it (the png_zalloc() function is the same -as png_malloc() except that it also zeroes the newly-allocated memory). - -If you allocated your row_pointers in a single block, as suggested above in -the description of the high level read interface, you must not transfer -responsibility for freeing it to the png_set_rows or png_read_destroy function, -because they would also try to free the individual row_pointers[i]. - -If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword -separately, do not transfer responsibility for freeing text_ptr to libpng, -because when libpng fills a png_text structure it combines these members with -the key member, and png_free_data() will free only text_ptr.key. Similarly, -if you transfer responsibility for free'ing text_ptr from libpng to your -application, your application must not separately free those members. - -The png_free_data() function will turn off the "valid" flag for anything -it frees. If you need to turn the flag off for a chunk that was freed by your -application instead of by libpng, you can use - - png_set_invalid(png_ptr, info_ptr, mask); - mask - identifies the chunks to be made invalid, - containing the logical OR of one or - more of - PNG_INFO_gAMA, PNG_INFO_sBIT, - PNG_INFO_cHRM, PNG_INFO_PLTE, - PNG_INFO_tRNS, PNG_INFO_bKGD, - PNG_INFO_hIST, PNG_INFO_pHYs, - PNG_INFO_oFFs, PNG_INFO_tIME, - PNG_INFO_pCAL, PNG_INFO_sRGB, - PNG_INFO_iCCP, PNG_INFO_sPLT, - PNG_INFO_sCAL, PNG_INFO_IDAT - -For a more compact example of reading a PNG image, see the file example.c. - -Reading PNG files progressively - -The progressive reader is slightly different then the non-progressive -reader. Instead of calling png_read_info(), png_read_rows(), and -png_read_end(), you make one call to png_process_data(), which calls -callbacks when it has the info, a row, or the end of the image. You -set up these callbacks with png_set_progressive_read_fn(). You don't -have to worry about the input/output functions of libpng, as you are -giving the library the data directly in png_process_data(). I will -assume that you have read the section on reading PNG files above, -so I will only highlight the differences (although I will show -all of the code). - -png_structp png_ptr; -png_infop info_ptr; - - /* An example code fragment of how you would - initialize the progressive reader in your - application. */ - int - initialize_png_reader() - { - png_ptr = png_create_read_struct - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn); - if (!png_ptr) - return (ERROR); - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) - { - png_destroy_read_struct(&png_ptr, (png_infopp)NULL, - (png_infopp)NULL); - return (ERROR); - } - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); - } - - /* This one's new. You can provide functions - to be called when the header info is valid, - when each row is completed, and when the image - is finished. If you aren't using all functions, - you can specify NULL parameters. Even when all - three functions are NULL, you need to call - png_set_progressive_read_fn(). You can use - any struct as the user_ptr (cast to a void pointer - for the function call), and retrieve the pointer - from inside the callbacks using the function - - png_get_progressive_ptr(png_ptr); - - which will return a void pointer, which you have - to cast appropriately. - */ - png_set_progressive_read_fn(png_ptr, (void *)user_ptr, - info_callback, row_callback, end_callback); - - return 0; - } - - /* A code fragment that you call as you receive blocks - of data */ - int - process_data(png_bytep buffer, png_uint_32 length) - { - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, - (png_infopp)NULL); - return (ERROR); - } - - /* This one's new also. Simply give it a chunk - of data from the file stream (in order, of - course). On machines with segmented memory - models machines, don't give it any more than - 64K. The library seems to run fine with sizes - of 4K. Although you can give it much less if - necessary (I assume you can give it chunks of - 1 byte, I haven't tried less then 256 bytes - yet). When this function returns, you may - want to display any rows that were generated - in the row callback if you don't already do - so there. - */ - png_process_data(png_ptr, info_ptr, buffer, length); - return 0; - } - - /* This function is called (as set by - png_set_progressive_read_fn() above) when enough data - has been supplied so all of the header has been - read. - */ - void - info_callback(png_structp png_ptr, png_infop info) - { - /* Do any setup here, including setting any of - the transformations mentioned in the Reading - PNG files section. For now, you _must_ call - either png_start_read_image() or - png_read_update_info() after all the - transformations are set (even if you don't set - any). You may start getting rows before - png_process_data() returns, so this is your - last chance to prepare for that. - */ - } - - /* This function is called when each row of image - data is complete */ - void - row_callback(png_structp png_ptr, png_bytep new_row, - png_uint_32 row_num, int pass) - { - /* If the image is interlaced, and you turned - on the interlace handler, this function will - be called for every row in every pass. Some - of these rows will not be changed from the - previous pass. When the row is not changed, - the new_row variable will be NULL. The rows - and passes are called in order, so you don't - really need the row_num and pass, but I'm - supplying them because it may make your life - easier. - - For the non-NULL rows of interlaced images, - you must call png_progressive_combine_row() - passing in the row and the old row. You can - call this function for NULL rows (it will just - return) and for non-interlaced images (it just - does the memcpy for you) if it will make the - code easier. Thus, you can just do this for - all cases: - */ - - png_progressive_combine_row(png_ptr, old_row, - new_row); - - /* where old_row is what was displayed for - previously for the row. Note that the first - pass (pass == 0, really) will completely cover - the old row, so the rows do not have to be - initialized. After the first pass (and only - for interlaced images), you will have to pass - the current row, and the function will combine - the old row and the new row. - */ - } - - void - end_callback(png_structp png_ptr, png_infop info) - { - /* This function is called after the whole image - has been read, including any chunks after the - image (up to and including the IEND). You - will usually have the same info chunk as you - had in the header, although some data may have - been added to the comments and time fields. - - Most people won't do much here, perhaps setting - a flag that marks the image as finished. - */ - } - - - -IV. Writing - -Much of this is very similar to reading. However, everything of -importance is repeated here, so you won't have to constantly look -back up in the reading section to understand writing. - -Setup - -You will want to do the I/O initialization before you get into libpng, -so if it doesn't work, you don't have anything to undo. If you are not -using the standard I/O functions, you will need to replace them with -custom writing functions. See the discussion under Customizing libpng. - - FILE *fp = fopen(file_name, "wb"); - if (!fp) - { - return (ERROR); - } - -Next, png_struct and png_info need to be allocated and initialized. -As these can be both relatively large, you may not want to store these -on the stack, unless you have stack space to spare. Of course, you -will want to check if they return NULL. If you are also reading, -you won't want to name your read structure and your write structure -both "png_ptr"; you can call them anything you like, such as -"read_ptr" and "write_ptr". Look at pngtest.c, for example. - - png_structp png_ptr = png_create_write_struct - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn); - if (!png_ptr) - return (ERROR); - - png_infop info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) - { - png_destroy_write_struct(&png_ptr, - (png_infopp)NULL); - return (ERROR); - } - -If you want to use your own memory allocation routines, -define PNG_USER_MEM_SUPPORTED and use -png_create_write_struct_2() instead of png_create_write_struct(): - - png_structp png_ptr = png_create_write_struct_2 - (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn, (png_voidp) - user_mem_ptr, user_malloc_fn, user_free_fn); - -After you have these structures, you will need to set up the -error handling. When libpng encounters an error, it expects to -longjmp() back to your routine. Therefore, you will need to call -setjmp() and pass the png_jmpbuf(png_ptr). If you -write the file from different routines, you will need to update -the png_jmpbuf(png_ptr) every time you enter a new routine that will -call a png_*() function. See your documentation of setjmp/longjmp -for your compiler for more information on setjmp/longjmp. See -the discussion on libpng error handling in the Customizing Libpng -section below for more information on the libpng error handling. - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_write_struct(&png_ptr, &info_ptr); - fclose(fp); - return (ERROR); - } - ... - return; - -If you would rather avoid the complexity of setjmp/longjmp issues, -you can compile libpng with PNG_SETJMP_NOT_SUPPORTED, in which case -errors will result in a call to PNG_ABORT() which defaults to abort(). - -Now you need to set up the output code. The default for libpng is to -use the C function fwrite(). If you use this, you will need to pass a -valid FILE * in the function png_init_io(). Be sure that the file is -opened in binary mode. Again, if you wish to handle writing data in -another way, see the discussion on libpng I/O handling in the Customizing -Libpng section below. - - png_init_io(png_ptr, fp); - -Write callbacks - -At this point, you can set up a callback function that will be -called after each row has been written, which you can use to control -a progress meter or the like. It's demonstrated in pngtest.c. -You must supply a function - - void write_row_callback(png_ptr, png_uint_32 row, int pass); - { - /* put your code here */ - } - -(You can give it another name that you like instead of "write_row_callback") - -To inform libpng about your function, use - - png_set_write_status_fn(png_ptr, write_row_callback); - -You now have the option of modifying how the compression library will -run. The following functions are mainly for testing, but may be useful -in some cases, like if you need to write PNG files extremely fast and -are willing to give up some compression, or if you want to get the -maximum possible compression at the expense of slower writing. If you -have no special needs in this area, let the library do what it wants by -not calling this function at all, as it has been tuned to deliver a good -speed/compression ratio. The second parameter to png_set_filter() is -the filter method, for which the only valid values are 0 (as of the -July 1999 PNG specification, version 1.2) or 64 (if you are writing -a PNG datastream that is to be embedded in a MNG datastream). The third -parameter is a flag that indicates which filter type(s) are to be tested -for each scanline. See the PNG specification for details on the specific filter -types. - - - /* turn on or off filtering, and/or choose - specific filters. You can use either a single PNG_FILTER_VALUE_NAME - or the logical OR of one or more PNG_FILTER_NAME masks. */ - png_set_filter(png_ptr, 0, - PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE | - PNG_FILTER_SUB | PNG_FILTER_VALUE_SUB | - PNG_FILTER_UP | PNG_FILTER_VALUE_UP | - PNG_FILTER_AVE | PNG_FILTER_VALUE_AVE | - PNG_FILTER_PAETH | PNG_FILTER_VALUE_PAETH| - PNG_ALL_FILTERS); - -If an application -wants to start and stop using particular filters during compression, -it should start out with all of the filters (to ensure that the previous -row of pixels will be stored in case it's needed later), and then add -and remove them after the start of compression. - -If you are writing a PNG datastream that is to be embedded in a MNG -datastream, the second parameter can be either 0 or 64. - -The png_set_compression_*() functions interface to the zlib compression -library, and should mostly be ignored unless you really know what you are -doing. The only generally useful call is png_set_compression_level() -which changes how much time zlib spends on trying to compress the image -data. See the Compression Library (zlib.h and algorithm.txt, distributed -with zlib) for details on the compression levels. - - /* set the zlib compression level */ - png_set_compression_level(png_ptr, - Z_BEST_COMPRESSION); - - /* set other zlib parameters */ - png_set_compression_mem_level(png_ptr, 8); - png_set_compression_strategy(png_ptr, - Z_DEFAULT_STRATEGY); - png_set_compression_window_bits(png_ptr, 15); - png_set_compression_method(png_ptr, 8); - png_set_compression_buffer_size(png_ptr, 8192) - -extern PNG_EXPORT(void,png_set_zbuf_size) - -Setting the contents of info for output - -You now need to fill in the png_info structure with all the data you -wish to write before the actual image. Note that the only thing you -are allowed to write after the image is the text chunks and the time -chunk (as of PNG Specification 1.2, anyway). See png_write_end() and -the latest PNG specification for more information on that. If you -wish to write them before the image, fill them in now, and flag that -data as being valid. If you want to wait until after the data, don't -fill them until png_write_end(). For all the fields in png_info and -their data types, see png.h. For explanations of what the fields -contain, see the PNG specification. - -Some of the more important parts of the png_info are: - - png_set_IHDR(png_ptr, info_ptr, width, height, - bit_depth, color_type, interlace_type, - compression_type, filter_method) - width - holds the width of the image - in pixels (up to 2^31). - height - holds the height of the image - in pixels (up to 2^31). - bit_depth - holds the bit depth of one of the - image channels. - (valid values are 1, 2, 4, 8, 16 - and depend also on the - color_type. See also significant - bits (sBIT) below). - color_type - describes which color/alpha - channels are present. - PNG_COLOR_TYPE_GRAY - (bit depths 1, 2, 4, 8, 16) - PNG_COLOR_TYPE_GRAY_ALPHA - (bit depths 8, 16) - PNG_COLOR_TYPE_PALETTE - (bit depths 1, 2, 4, 8) - PNG_COLOR_TYPE_RGB - (bit_depths 8, 16) - PNG_COLOR_TYPE_RGB_ALPHA - (bit_depths 8, 16) - - PNG_COLOR_MASK_PALETTE - PNG_COLOR_MASK_COLOR - PNG_COLOR_MASK_ALPHA - - interlace_type - PNG_INTERLACE_NONE or - PNG_INTERLACE_ADAM7 - compression_type - (must be - PNG_COMPRESSION_TYPE_DEFAULT) - filter_method - (must be PNG_FILTER_TYPE_DEFAULT - or, if you are writing a PNG to - be embedded in a MNG datastream, - can also be - PNG_INTRAPIXEL_DIFFERENCING) - - png_set_PLTE(png_ptr, info_ptr, palette, - num_palette); - palette - the palette for the file - (array of png_color) - num_palette - number of entries in the palette - - png_set_gAMA(png_ptr, info_ptr, gamma); - gamma - the gamma the image was created - at (PNG_INFO_gAMA) - - png_set_sRGB(png_ptr, info_ptr, srgb_intent); - srgb_intent - the rendering intent - (PNG_INFO_sRGB) The presence of - the sRGB chunk means that the pixel - data is in the sRGB color space. - This chunk also implies specific - values of gAMA and cHRM. Rendering - intent is the CSS-1 property that - has been defined by the International - Color Consortium - (http://www.color.org). - It can be one of - PNG_sRGB_INTENT_SATURATION, - PNG_sRGB_INTENT_PERCEPTUAL, - PNG_sRGB_INTENT_ABSOLUTE, or - PNG_sRGB_INTENT_RELATIVE. - - - png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, - srgb_intent); - srgb_intent - the rendering intent - (PNG_INFO_sRGB) The presence of the - sRGB chunk means that the pixel - data is in the sRGB color space. - This function also causes gAMA and - cHRM chunks with the specific values - that are consistent with sRGB to be - written. - - png_set_iCCP(png_ptr, info_ptr, name, compression_type, - profile, proflen); - name - The profile name. - compression - The compression type; always PNG_COMPRESSION_TYPE_BASE - for PNG 1.0. You may give NULL to this argument - to ignore it. - profile - International Color Consortium color profile - data. May contain NULs. - proflen - length of profile data in bytes. - - png_set_sBIT(png_ptr, info_ptr, sig_bit); - sig_bit - the number of significant bits for - (PNG_INFO_sBIT) each of the gray, red, - green, and blue channels, whichever are - appropriate for the given color type - (png_color_16) - - png_set_tRNS(png_ptr, info_ptr, trans, num_trans, - trans_values); - trans - array of transparent entries for - palette (PNG_INFO_tRNS) - trans_values - graylevel or color sample values of - the single transparent color for - non-paletted images (PNG_INFO_tRNS) - num_trans - number of transparent entries - (PNG_INFO_tRNS) - - png_set_hIST(png_ptr, info_ptr, hist); - (PNG_INFO_hIST) - hist - histogram of palette (array of - png_uint_16) - - png_set_tIME(png_ptr, info_ptr, mod_time); - mod_time - time image was last modified - (PNG_VALID_tIME) - - png_set_bKGD(png_ptr, info_ptr, background); - background - background color (PNG_VALID_bKGD) - - png_set_text(png_ptr, info_ptr, text_ptr, num_text); - text_ptr - array of png_text holding image - comments - text_ptr[i].compression - type of compression used - on "text" PNG_TEXT_COMPRESSION_NONE - PNG_TEXT_COMPRESSION_zTXt - PNG_ITXT_COMPRESSION_NONE - PNG_ITXT_COMPRESSION_zTXt - text_ptr[i].key - keyword for comment. Must contain - 1-79 characters. - text_ptr[i].text - text comments for current - keyword. Can be NULL or empty. - text_ptr[i].text_length - length of text string, - after decompression, 0 for iTXt - text_ptr[i].itxt_length - length of itxt string, - after decompression, 0 for tEXt/zTXt - text_ptr[i].lang - language of comment (NULL or - empty for unknown). - text_ptr[i].translated_keyword - keyword in UTF-8 (NULL - or empty for unknown). - num_text - number of comments - - png_set_sPLT(png_ptr, info_ptr, &palette_ptr, num_spalettes); - palette_ptr - array of png_sPLT_struct structures to be - added to the list of palettes in the info - structure. - num_spalettes - number of palette structures to be added. - - png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, - unit_type); - offset_x - positive offset from the left - edge of the screen - offset_y - positive offset from the top - edge of the screen - unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER - - png_set_pHYs(png_ptr, info_ptr, res_x, res_y, - unit_type); - res_x - pixels/unit physical resolution - in x direction - res_y - pixels/unit physical resolution - in y direction - unit_type - PNG_RESOLUTION_UNKNOWN, - PNG_RESOLUTION_METER - - png_set_sCAL(png_ptr, info_ptr, unit, width, height) - unit - physical scale units (an integer) - width - width of a pixel in physical scale units - height - height of a pixel in physical scale units - (width and height are doubles) - - png_set_sCAL_s(png_ptr, info_ptr, unit, width, height) - unit - physical scale units (an integer) - width - width of a pixel in physical scale units - height - height of a pixel in physical scale units - (width and height are strings like "2.54") - - png_set_unknown_chunks(png_ptr, info_ptr, &unknowns, num_unknowns) - unknowns - array of png_unknown_chunk structures holding - unknown chunks - unknowns[i].name - name of unknown chunk - unknowns[i].data - data of unknown chunk - unknowns[i].size - size of unknown chunk's data - unknowns[i].location - position to write chunk in file - 0: do not write chunk - PNG_HAVE_IHDR: before PLTE - PNG_HAVE_PLTE: before IDAT - PNG_AFTER_IDAT: after IDAT - The "location" member is set automatically according to - what part of the output file has already been written. - You can change its value after calling png_set_unknown_chunks() - as demonstrated in pngtest.c. Within each of the "locations", - the chunks are sequenced according to their position in the - structure (that is, the value of "i", which is the order in which - the chunk was either read from the input file or defined with - png_set_unknown_chunks). - -A quick word about text and num_text. text is an array of png_text -structures. num_text is the number of valid structures in the array. -Each png_text structure holds a language code, a keyword, a text value, -and a compression type. - -The compression types have the same valid numbers as the compression -types of the image data. Currently, the only valid number is zero. -However, you can store text either compressed or uncompressed, unlike -images, which always have to be compressed. So if you don't want the -text compressed, set the compression type to PNG_TEXT_COMPRESSION_NONE. -Because tEXt and zTXt chunks don't have a language field, if you -specify PNG_TEXT_COMPRESSION_NONE or PNG_TEXT_COMPRESSION_zTXt -any language code or translated keyword will not be written out. - -Until text gets around 1000 bytes, it is not worth compressing it. -After the text has been written out to the file, the compression type -is set to PNG_TEXT_COMPRESSION_NONE_WR or PNG_TEXT_COMPRESSION_zTXt_WR, -so that it isn't written out again at the end (in case you are calling -png_write_end() with the same struct. - -The keywords that are given in the PNG Specification are: - - Title Short (one line) title or - caption for image - Author Name of image's creator - Description Description of image (possibly long) - Copyright Copyright notice - Creation Time Time of original image creation - (usually RFC 1123 format, see below) - Software Software used to create the image - Disclaimer Legal disclaimer - Warning Warning of nature of content - Source Device used to create the image - Comment Miscellaneous comment; conversion - from other image format - -The keyword-text pairs work like this. Keywords should be short -simple descriptions of what the comment is about. Some typical -keywords are found in the PNG specification, as is some recommendations -on keywords. You can repeat keywords in a file. You can even write -some text before the image and some after. For example, you may want -to put a description of the image before the image, but leave the -disclaimer until after, so viewers working over modem connections -don't have to wait for the disclaimer to go over the modem before -they start seeing the image. Finally, keywords should be full -words, not abbreviations. Keywords and text are in the ISO 8859-1 -(Latin-1) character set (a superset of regular ASCII) and can not -contain NUL characters, and should not contain control or other -unprintable characters. To make the comments widely readable, stick -with basic ASCII, and avoid machine specific character set extensions -like the IBM-PC character set. The keyword must be present, but -you can leave off the text string on non-compressed pairs. -Compressed pairs must have a text string, as only the text string -is compressed anyway, so the compression would be meaningless. - -PNG supports modification time via the png_time structure. Two -conversion routines are provided, png_convert_from_time_t() for -time_t and png_convert_from_struct_tm() for struct tm. The -time_t routine uses gmtime(). You don't have to use either of -these, but if you wish to fill in the png_time structure directly, -you should provide the time in universal time (GMT) if possible -instead of your local time. Note that the year number is the full -year (e.g. 1998, rather than 98 - PNG is year 2000 compliant!), and -that months start with 1. - -If you want to store the time of the original image creation, you should -use a plain tEXt chunk with the "Creation Time" keyword. This is -necessary because the "creation time" of a PNG image is somewhat vague, -depending on whether you mean the PNG file, the time the image was -created in a non-PNG format, a still photo from which the image was -scanned, or possibly the subject matter itself. In order to facilitate -machine-readable dates, it is recommended that the "Creation Time" -tEXt chunk use RFC 1123 format dates (e.g. "22 May 1997 18:07:10 GMT"), -although this isn't a requirement. Unlike the tIME chunk, the -"Creation Time" tEXt chunk is not expected to be automatically changed -by the software. To facilitate the use of RFC 1123 dates, a function -png_convert_to_rfc1123(png_timep) is provided to convert from PNG -time to an RFC 1123 format string. - -Writing unknown chunks - -You can use the png_set_unknown_chunks function to queue up chunks -for writing. You give it a chunk name, raw data, and a size; that's -all there is to it. The chunks will be written by the next following -png_write_info_before_PLTE, png_write_info, or png_write_end function. -Any chunks previously read into the info structure's unknown-chunk -list will also be written out in a sequence that satisfies the PNG -specification's ordering rules. - -The high-level write interface - -At this point there are two ways to proceed; through the high-level -write interface, or through a sequence of low-level write operations. -You can use the high-level interface if your image data is present -in the info structure. All defined output -transformations are permitted, enabled by the following masks. - - PNG_TRANSFORM_IDENTITY No transformation - PNG_TRANSFORM_PACKING Pack 1, 2 and 4-bit samples - PNG_TRANSFORM_PACKSWAP Change order of packed pixels to LSB first - PNG_TRANSFORM_INVERT_MONO Invert monochrome images - PNG_TRANSFORM_SHIFT Normalize pixels to the sBIT depth - PNG_TRANSFORM_BGR Flip RGB to BGR, RGBA to BGRA - PNG_TRANSFORM_SWAP_ALPHA Flip RGBA to ARGB or GA to AG - PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity to transparency - PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples - PNG_TRANSFORM_STRIP_FILLER Strip out filler bytes. - -If you have valid image data in the info structure (you can use -png_set_rows() to put image data in the info structure), simply do this: - - png_write_png(png_ptr, info_ptr, png_transforms, NULL) - -where png_transforms is an integer containing the logical OR of some set of -transformation flags. This call is equivalent to png_write_info(), -followed the set of transformations indicated by the transform mask, -then png_write_image(), and finally png_write_end(). - -(The final parameter of this call is not yet used. Someday it might point -to transformation parameters required by some future output transform.) - -The low-level write interface - -If you are going the low-level route instead, you are now ready to -write all the file information up to the actual image data. You do -this with a call to png_write_info(). - - png_write_info(png_ptr, info_ptr); - -Note that there is one transformation you may need to do before -png_write_info(). In PNG files, the alpha channel in an image is the -level of opacity. If your data is supplied as a level of -transparency, you can invert the alpha channel before you write it, so -that 0 is fully transparent and 255 (in 8-bit or paletted images) or -65535 (in 16-bit images) is fully opaque, with - - png_set_invert_alpha(png_ptr); - -This must appear before png_write_info() instead of later with the -other transformations because in the case of paletted images the tRNS -chunk data has to be inverted before the tRNS chunk is written. If -your image is not a paletted image, the tRNS data (which in such cases -represents a single color to be rendered as transparent) won't need to -be changed, and you can safely do this transformation after your -png_write_info() call. - -If you need to write a private chunk that you want to appear before -the PLTE chunk when PLTE is present, you can write the PNG info in -two steps, and insert code to write your own chunk between them: - - png_write_info_before_PLTE(png_ptr, info_ptr); - png_set_unknown_chunks(png_ptr, info_ptr, ...); - png_write_info(png_ptr, info_ptr); - -After you've written the file information, you can set up the library -to handle any special transformations of the image data. The various -ways to transform the data will be described in the order that they -should occur. This is important, as some of these change the color -type and/or bit depth of the data, and some others only work on -certain color types and bit depths. Even though each transformation -checks to see if it has data that it can do something with, you should -make sure to only enable a transformation if it will be valid for the -data. For example, don't swap red and blue on grayscale data. - -PNG files store RGB pixels packed into 3 or 6 bytes. This code tells -the library to strip input data that has 4 or 8 bytes per pixel down -to 3 or 6 bytes (or strip 2 or 4-byte grayscale+filler data to 1 or 2 -bytes per pixel). - - png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); - -where the 0 is unused, and the location is either PNG_FILLER_BEFORE or -PNG_FILLER_AFTER, depending upon whether the filler byte in the pixel -is stored XRGB or RGBX. - -PNG files pack pixels of bit depths 1, 2, and 4 into bytes as small as -they can, resulting in, for example, 8 pixels per byte for 1 bit files. -If the data is supplied at 1 pixel per byte, use this code, which will -correctly pack the pixels into a single byte: - - png_set_packing(png_ptr); - -PNG files reduce possible bit depths to 1, 2, 4, 8, and 16. If your -data is of another bit depth, you can write an sBIT chunk into the -file so that decoders can recover the original data if desired. - - /* Set the true bit depth of the image data */ - if (color_type & PNG_COLOR_MASK_COLOR) - { - sig_bit.red = true_bit_depth; - sig_bit.green = true_bit_depth; - sig_bit.blue = true_bit_depth; - } - else - { - sig_bit.gray = true_bit_depth; - } - if (color_type & PNG_COLOR_MASK_ALPHA) - { - sig_bit.alpha = true_bit_depth; - } - - png_set_sBIT(png_ptr, info_ptr, &sig_bit); - -If the data is stored in the row buffer in a bit depth other than -one supported by PNG (e.g. 3 bit data in the range 0-7 for a 4-bit PNG), -this will scale the values to appear to be the correct bit depth as -is required by PNG. - - png_set_shift(png_ptr, &sig_bit); - -PNG files store 16 bit pixels in network byte order (big-endian, -ie. most significant bits first). This code would be used if they are -supplied the other way (little-endian, i.e. least significant bits -first, the way PCs store them): - - if (bit_depth > 8) - png_set_swap(png_ptr); - -If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you -need to change the order the pixels are packed into bytes, you can use: - - if (bit_depth < 8) - png_set_packswap(png_ptr); - -PNG files store 3 color pixels in red, green, blue order. This code -would be used if they are supplied as blue, green, red: - - png_set_bgr(png_ptr); - -PNG files describe monochrome as black being zero and white being -one. This code would be used if the pixels are supplied with this reversed -(black being one and white being zero): - - png_set_invert_mono(png_ptr); - -Finally, you can write your own transformation function if none of -the existing ones meets your needs. This is done by setting a callback -with - - png_set_write_user_transform_fn(png_ptr, - write_transform_fn); - -You must supply the function - - void write_transform_fn(png_ptr ptr, row_info_ptr - row_info, png_bytep data) - -See pngtest.c for a working example. Your function will be called -before any of the other transformations are processed. - -You can also set up a pointer to a user structure for use by your -callback function. - - png_set_user_transform_info(png_ptr, user_ptr, 0, 0); - -The user_channels and user_depth parameters of this function are ignored -when writing; you can set them to zero as shown. - -You can retrieve the pointer via the function png_get_user_transform_ptr(). -For example: - - voidp write_user_transform_ptr = - png_get_user_transform_ptr(png_ptr); - -It is possible to have libpng flush any pending output, either manually, -or automatically after a certain number of lines have been written. To -flush the output stream a single time call: - - png_write_flush(png_ptr); - -and to have libpng flush the output stream periodically after a certain -number of scanlines have been written, call: - - png_set_flush(png_ptr, nrows); - -Note that the distance between rows is from the last time png_write_flush() -was called, or the first row of the image if it has never been called. -So if you write 50 lines, and then png_set_flush 25, it will flush the -output on the next scanline, and every 25 lines thereafter, unless -png_write_flush() is called before 25 more lines have been written. -If nrows is too small (less than about 10 lines for a 640 pixel wide -RGB image) the image compression may decrease noticeably (although this -may be acceptable for real-time applications). Infrequent flushing will -only degrade the compression performance by a few percent over images -that do not use flushing. - -Writing the image data - -That's it for the transformations. Now you can write the image data. -The simplest way to do this is in one function call. If you have the -whole image in memory, you can just call png_write_image() and libpng -will write the image. You will need to pass in an array of pointers to -each row. This function automatically handles interlacing, so you don't -need to call png_set_interlace_handling() or call this function multiple -times, or any of that other stuff necessary with png_write_rows(). - - png_write_image(png_ptr, row_pointers); - -where row_pointers is: - - png_byte *row_pointers[height]; - -You can point to void or char or whatever you use for pixels. - -If you don't want to write the whole image at once, you can -use png_write_rows() instead. If the file is not interlaced, -this is simple: - - png_write_rows(png_ptr, row_pointers, - number_of_rows); - -row_pointers is the same as in the png_write_image() call. - -If you are just writing one row at a time, you can do this with -a single row_pointer instead of an array of row_pointers: - - png_bytep row_pointer = row; - - png_write_row(png_ptr, row_pointer); - -When the file is interlaced, things can get a good deal more -complicated. The only currently (as of the PNG Specification -version 1.2, dated July 1999) defined interlacing scheme for PNG files -is the "Adam7" interlace scheme, that breaks down an -image into seven smaller images of varying size. libpng will build -these images for you, or you can do them yourself. If you want to -build them yourself, see the PNG specification for details of which -pixels to write when. - -If you don't want libpng to handle the interlacing details, just -use png_set_interlace_handling() and call png_write_rows() the -correct number of times to write all seven sub-images. - -If you want libpng to build the sub-images, call this before you start -writing any rows: - - number_of_passes = - png_set_interlace_handling(png_ptr); - -This will return the number of passes needed. Currently, this -is seven, but may change if another interlace type is added. - -Then write the complete image number_of_passes times. - - png_write_rows(png_ptr, row_pointers, - number_of_rows); - -As some of these rows are not used, and thus return immediately, -you may want to read about interlacing in the PNG specification, -and only update the rows that are actually used. - -Finishing a sequential write - -After you are finished writing the image, you should finish writing -the file. If you are interested in writing comments or time, you should -pass an appropriately filled png_info pointer. If you are not interested, -you can pass NULL. - - png_write_end(png_ptr, info_ptr); - -When you are done, you can free all memory used by libpng like this: - - png_destroy_write_struct(&png_ptr, &info_ptr); - -It is also possible to individually free the info_ptr members that -point to libpng-allocated storage with the following function: - - png_free_data(png_ptr, info_ptr, mask, n) - mask - identifies data to be freed, a mask - containing the logical OR of one or - more of - PNG_FREE_PLTE, PNG_FREE_TRNS, - PNG_FREE_HIST, PNG_FREE_ICCP, - PNG_FREE_PCAL, PNG_FREE_ROWS, - PNG_FREE_SCAL, PNG_FREE_SPLT, - PNG_FREE_TEXT, PNG_FREE_UNKN, - or simply PNG_FREE_ALL - n - sequence number of item to be freed - (-1 for all items) - -This function may be safely called when the relevant storage has -already been freed, or has not yet been allocated, or was allocated -by the user and not by libpng, and will in those -cases do nothing. The "n" parameter is ignored if only one item -of the selected data type, such as PLTE, is allowed. If "n" is not --1, and multiple items are allowed for the data type identified in -the mask, such as text or sPLT, only the n'th item is freed. - -If you allocated data such as a palette that you passed -in to libpng with png_set_*, you must not free it until just before the call to -png_destroy_write_struct(). - -The default behavior is only to free data that was allocated internally -by libpng. This can be changed, so that libpng will not free the data, -or so that it will free data that was allocated by the user with png_malloc() -or png_zalloc() and passed in via a png_set_*() function, with - - png_data_freer(png_ptr, info_ptr, freer, mask) - mask - which data elements are affected - same choices as in png_free_data() - freer - one of - PNG_DESTROY_WILL_FREE_DATA - PNG_SET_WILL_FREE_DATA - PNG_USER_WILL_FREE_DATA - -For example, to transfer responsibility for some data from a read structure -to a write structure, you could use - - png_data_freer(read_ptr, read_info_ptr, - PNG_USER_WILL_FREE_DATA, - PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST) - png_data_freer(write_ptr, write_info_ptr, - PNG_DESTROY_WILL_FREE_DATA, - PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST) - -thereby briefly reassigning responsibility for freeing to the user but -immediately afterwards reassigning it once more to the write_destroy -function. Having done this, it would then be safe to destroy the read -structure and continue to use the PLTE, tRNS, and hIST data in the write -structure. - -This function only affects data that has already been allocated. -You can call this function before calling after the png_set_*() functions -to control whether the user or png_destroy_*() is supposed to free the data. -When the user assumes responsibility for libpng-allocated data, the -application must use -png_free() to free it, and when the user transfers responsibility to libpng -for data that the user has allocated, the user must have used png_malloc() -or png_zalloc() to allocate it. - -If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword -separately, do not transfer responsibility for freeing text_ptr to libpng, -because when libpng fills a png_text structure it combines these members with -the key member, and png_free_data() will free only text_ptr.key. Similarly, -if you transfer responsibility for free'ing text_ptr from libpng to your -application, your application must not separately free those members. -For a more compact example of writing a PNG image, see the file example.c. - -V. Modifying/Customizing libpng: - -There are three issues here. The first is changing how libpng does -standard things like memory allocation, input/output, and error handling. -The second deals with more complicated things like adding new chunks, -adding new transformations, and generally changing how libpng works. -Both of those are compile-time issues; that is, they are generally -determined at the time the code is written, and there is rarely a need -to provide the user with a means of changing them. The third is a -run-time issue: choosing between and/or tuning one or more alternate -versions of computationally intensive routines; specifically, optimized -assembly-language (and therefore compiler- and platform-dependent) -versions. - -Memory allocation, input/output, and error handling - -All of the memory allocation, input/output, and error handling in libpng -goes through callbacks that are user-settable. The default routines are -in pngmem.c, pngrio.c, pngwio.c, and pngerror.c, respectively. To change -these functions, call the appropriate png_set_*_fn() function. - -Memory allocation is done through the functions png_malloc(), png_zalloc(), -and png_free(). These currently just call the standard C functions. If -your pointers can't access more then 64K at a time, you will want to set -MAXSEG_64K in zlib.h. Since it is unlikely that the method of handling -memory allocation on a platform will change between applications, these -functions must be modified in the library at compile time. If you prefer -to use a different method of allocating and freeing data, you can use - - png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr - malloc_fn, png_free_ptr free_fn) - -This function also provides a void pointer that can be retrieved via - - mem_ptr=png_get_mem_ptr(png_ptr); - -Your replacement memory functions must have prototypes as follows: - - png_voidp malloc_fn(png_structp png_ptr, png_uint_32 size); - void free_fn(png_structp png_ptr, png_voidp ptr); - -Input/Output in libpng is done through png_read() and png_write(), -which currently just call fread() and fwrite(). The FILE * is stored in -png_struct and is initialized via png_init_io(). If you wish to change -the method of I/O, the library supplies callbacks that you can set -through the function png_set_read_fn() and png_set_write_fn() at run -time, instead of calling the png_init_io() function. These functions -also provide a void pointer that can be retrieved via the function -png_get_io_ptr(). For example: - - png_set_read_fn(png_structp read_ptr, - voidp read_io_ptr, png_rw_ptr read_data_fn) - - png_set_write_fn(png_structp write_ptr, - voidp write_io_ptr, png_rw_ptr write_data_fn, - png_flush_ptr output_flush_fn); - - voidp read_io_ptr = png_get_io_ptr(read_ptr); - voidp write_io_ptr = png_get_io_ptr(write_ptr); - -The replacement I/O functions must have prototypes as follows: - - void user_read_data(png_structp png_ptr, - png_bytep data, png_uint_32 length); - void user_write_data(png_structp png_ptr, - png_bytep data, png_uint_32 length); - void user_flush_data(png_structp png_ptr); - -Supplying NULL for the read, write, or flush functions sets them back -to using the default C stream functions. It is an error to read from -a write stream, and vice versa. - -Error handling in libpng is done through png_error() and png_warning(). -Errors handled through png_error() are fatal, meaning that png_error() -should never return to its caller. Currently, this is handled via -setjmp() and longjmp() (unless you have compiled libpng with -PNG_SETJMP_NOT_SUPPORTED, in which case it is handled via PNG_ABORT()), -but you could change this to do things like exit() if you should wish. - -On non-fatal errors, png_warning() is called -to print a warning message, and then control returns to the calling code. -By default png_error() and png_warning() print a message on stderr via -fprintf() unless the library is compiled with PNG_NO_CONSOLE_IO defined -(because you don't want the messages) or PNG_NO_STDIO defined (because -fprintf() isn't available). If you wish to change the behavior of the error -functions, you will need to set up your own message callbacks. These -functions are normally supplied at the time that the png_struct is created. -It is also possible to redirect errors and warnings to your own replacement -functions after png_create_*_struct() has been called by calling: - - png_set_error_fn(png_structp png_ptr, - png_voidp error_ptr, png_error_ptr error_fn, - png_error_ptr warning_fn); - - png_voidp error_ptr = png_get_error_ptr(png_ptr); - -If NULL is supplied for either error_fn or warning_fn, then the libpng -default function will be used, calling fprintf() and/or longjmp() if a -problem is encountered. The replacement error functions should have -parameters as follows: - - void user_error_fn(png_structp png_ptr, - png_const_charp error_msg); - void user_warning_fn(png_structp png_ptr, - png_const_charp warning_msg); - -The motivation behind using setjmp() and longjmp() is the C++ throw and -catch exception handling methods. This makes the code much easier to write, -as there is no need to check every return code of every function call. -However, there are some uncertainties about the status of local variables -after a longjmp, so the user may want to be careful about doing anything after -setjmp returns non-zero besides returning itself. Consult your compiler -documentation for more details. For an alternative approach, you may wish -to use the "cexcept" facility (see http://cexcept.sourceforge.net). - -Custom chunks - -If you need to read or write custom chunks, you may need to get deeper -into the libpng code. The library now has mechanisms for storing -and writing chunks of unknown type; you can even declare callbacks -for custom chunks. Hoewver, this may not be good enough if the -library code itself needs to know about interactions between your -chunk and existing `intrinsic' chunks. - -If you need to write a new intrinsic chunk, first read the PNG -specification. Acquire a first level of -understanding of how it works. Pay particular attention to the -sections that describe chunk names, and look at how other chunks were -designed, so you can do things similarly. Second, check out the -sections of libpng that read and write chunks. Try to find a chunk -that is similar to yours and use it as a template. More details can -be found in the comments inside the code. It is best to handle unknown -chunks in a generic method, via callback functions, instead of by -modifying libpng functions. - -If you wish to write your own transformation for the data, look through -the part of the code that does the transformations, and check out some of -the simpler ones to get an idea of how they work. Try to find a similar -transformation to the one you want to add and copy off of it. More details -can be found in the comments inside the code itself. - -Configuring for 16 bit platforms - -You will want to look into zconf.h to tell zlib (and thus libpng) that -it cannot allocate more then 64K at a time. Even if you can, the memory -won't be accessible. So limit zlib and libpng to 64K by defining MAXSEG_64K. - -Configuring for DOS - -For DOS users who only have access to the lower 640K, you will -have to limit zlib's memory usage via a png_set_compression_mem_level() -call. See zlib.h or zconf.h in the zlib library for more information. - -Configuring for Medium Model - -Libpng's support for medium model has been tested on most of the popular -compilers. Make sure MAXSEG_64K gets defined, USE_FAR_KEYWORD gets -defined, and FAR gets defined to far in pngconf.h, and you should be -all set. Everything in the library (except for zlib's structure) is -expecting far data. You must use the typedefs with the p or pp on -the end for pointers (or at least look at them and be careful). Make -note that the rows of data are defined as png_bytepp, which is an -unsigned char far * far *. - -Configuring for gui/windowing platforms: - -You will need to write new error and warning functions that use the GUI -interface, as described previously, and set them to be the error and -warning functions at the time that png_create_*_struct() is called, -in order to have them available during the structure initialization. -They can be changed later via png_set_error_fn(). On some compilers, -you may also have to change the memory allocators (png_malloc, etc.). - -Configuring for compiler xxx: - -All includes for libpng are in pngconf.h. If you need to add/change/delete -an include, this is the place to do it. The includes that are not -needed outside libpng are protected by the PNG_INTERNAL definition, -which is only defined for those routines inside libpng itself. The -files in libpng proper only include png.h, which includes pngconf.h. - -Configuring zlib: - -There are special functions to configure the compression. Perhaps the -most useful one changes the compression level, which currently uses -input compression values in the range 0 - 9. The library normally -uses the default compression level (Z_DEFAULT_COMPRESSION = 6). Tests -have shown that for a large majority of images, compression values in -the range 3-6 compress nearly as well as higher levels, and do so much -faster. For online applications it may be desirable to have maximum speed -(Z_BEST_SPEED = 1). With versions of zlib after v0.99, you can also -specify no compression (Z_NO_COMPRESSION = 0), but this would create -files larger than just storing the raw bitmap. You can specify the -compression level by calling: - - png_set_compression_level(png_ptr, level); - -Another useful one is to reduce the memory level used by the library. -The memory level defaults to 8, but it can be lowered if you are -short on memory (running DOS, for example, where you only have 640K). - - png_set_compression_mem_level(png_ptr, level); - -The other functions are for configuring zlib. They are not recommended -for normal use and may result in writing an invalid PNG file. See -zlib.h for more information on what these mean. - - png_set_compression_strategy(png_ptr, - strategy); - png_set_compression_window_bits(png_ptr, - window_bits); - png_set_compression_method(png_ptr, method); - png_set_compression_buffer_size(png_ptr, size); - -Controlling row filtering - -If you want to control whether libpng uses filtering or not, which -filters are used, and how it goes about picking row filters, you -can call one of these functions. The selection and configuration -of row filters can have a significant impact on the size and -encoding speed and a somewhat lesser impact on the decoding speed -of an image. Filtering is enabled by default for RGB and grayscale -images (with and without alpha), but not for paletted images nor -for any images with bit depths less than 8 bits/pixel. - -The 'method' parameter sets the main filtering method, which is -currently only '0' in the PNG 1.2 specification. The 'filters' -parameter sets which filter(s), if any, should be used for each -scanline. Possible values are PNG_ALL_FILTERS and PNG_NO_FILTERS -to turn filtering on and off, respectively. - -Individual filter types are PNG_FILTER_NONE, PNG_FILTER_SUB, -PNG_FILTER_UP, PNG_FILTER_AVG, PNG_FILTER_PAETH, which can be bitwise -ORed together with '|' to specify one or more filters to use. -These filters are described in more detail in the PNG specification. If -you intend to change the filter type during the course of writing -the image, you should start with flags set for all of the filters -you intend to use so that libpng can initialize its internal -structures appropriately for all of the filter types. - - filters = PNG_FILTER_NONE | PNG_FILTER_SUB - PNG_FILTER_UP | PNG_FILTER_AVE | - PNG_FILTER_PAETH | PNG_ALL_FILTERS; - or - filters = one of PNG_FILTER_VALUE_NONE, - PNG_FILTER_VALUE_SUB, PNG_FILTER_VALUE_UP, - PNG_FILTER_VALUE_AVE, PNG_FILTER_VALUE_PAETH - - png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, - filters); - The second parameter can also be PNG_INTRAPIXEL_DIFFERENCING - if you are writing a PNG to be embedded in a MNG - datastream. This parameter must be the same as the - value of filter_method used in png_set_IHDR(). - -It is also possible to influence how libpng chooses from among the -available filters. This is done in two ways - by telling it how -important it is to keep the same filter for successive rows, and -by telling it the relative computational costs of the filters. - - double weights[3] = {1.5, 1.3, 1.1}, - costs[PNG_FILTER_VALUE_LAST] = - {1.0, 1.3, 1.3, 1.5, 1.7}; - - png_set_filter_selection(png_ptr, - PNG_FILTER_SELECTION_WEIGHTED, 3, - weights, costs); - -The weights are multiplying factors that indicate to libpng that the -row filter should be the same for successive rows unless another row filter -is that many times better than the previous filter. In the above example, -if the previous 3 filters were SUB, SUB, NONE, the SUB filter could have a -"sum of absolute differences" 1.5 x 1.3 times higher than other filters -and still be chosen, while the NONE filter could have a sum 1.1 times -higher than other filters and still be chosen. Unspecified weights are -taken to be 1.0, and the specified weights should probably be declining -like those above in order to emphasize recent filters over older filters. - -The filter costs specify for each filter type a relative decoding cost -to be considered when selecting row filters. This means that filters -with higher costs are less likely to be chosen over filters with lower -costs, unless their "sum of absolute differences" is that much smaller. -The costs do not necessarily reflect the exact computational speeds of -the various filters, since this would unduly influence the final image -size. - -Note that the numbers above were invented purely for this example and -are given only to help explain the function usage. Little testing has -been done to find optimum values for either the costs or the weights. - -Removing unwanted object code - -There are a bunch of #define's in pngconf.h that control what parts of -libpng are compiled. All the defines end in _SUPPORTED. If you are -never going to use a capability, you can change the #define to #undef -before recompiling libpng and save yourself code and data space, or -you can turn off individual capabilities with defines that begin with -PNG_NO_. - -You can also turn all of the transforms and ancillary chunk capabilities -off en masse with compiler directives that define -PNG_NO_READ[or WRITE]_TRANSFORMS, or PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS, -or all four, -along with directives to turn on any of the capabilities that you do -want. The PNG_NO_READ[or WRITE]_TRANSFORMS directives disable -the extra transformations but still leave the library fully capable of reading -and writing PNG files with all known public chunks -Use of the PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS directive -produces a library that is incapable of reading or writing ancillary chunks. -If you are not using the progressive reading capability, you can -turn that off with PNG_NO_PROGRESSIVE_READ (don't confuse -this with the INTERLACING capability, which you'll still have). - -All the reading and writing specific code are in separate files, so the -linker should only grab the files it needs. However, if you want to -make sure, or if you are building a stand alone library, all the -reading files start with pngr and all the writing files start with -pngw. The files that don't match either (like png.c, pngtrans.c, etc.) -are used for both reading and writing, and always need to be included. -The progressive reader is in pngpread.c - -If you are creating or distributing a dynamically linked library (a .so -or DLL file), you should not remove or disable any parts of the library, -as this will cause applications linked with different versions of the -library to fail if they call functions not available in your library. -The size of the library itself should not be an issue, because only -those sections that are actually used will be loaded into memory. - -Requesting debug printout - -The macro definition PNG_DEBUG can be used to request debugging -printout. Set it to an integer value in the range 0 to 3. Higher -numbers result in increasing amounts of debugging information. The -information is printed to the "stderr" file, unless another file -name is specified in the PNG_DEBUG_FILE macro definition. - -When PNG_DEBUG > 0, the following functions (macros) become available: - - png_debug(level, message) - png_debug1(level, message, p1) - png_debug2(level, message, p1, p2) - -in which "level" is compared to PNG_DEBUG to decide whether to print -the message, "message" is the formatted string to be printed, -and p1 and p2 are parameters that are to be embedded in the string -according to printf-style formatting directives. For example, - - png_debug1(2, "foo=%d\n", foo); - -is expanded to - - if(PNG_DEBUG > 2) - fprintf(PNG_DEBUG_FILE, "foo=%d\n", foo); - -When PNG_DEBUG is defined but is zero, the macros aren't defined, but you -can still use PNG_DEBUG to control your own debugging: - - #ifdef PNG_DEBUG - fprintf(stderr, ... - #endif - -When PNG_DEBUG = 1, the macros are defined, but only png_debug statements -having level = 0 will be printed. There aren't any such statements in -this version of libpng, but if you insert some they will be printed. - - -VI. MNG support - -The MNG specification (available at http://www.libpng.org/pub/mng) allows -certain extensions to PNG for PNG images that are embedded in MNG datastreams. -Libpng can support some of these extensions. To enable them, use the -png_permit_mng_features() function: - - feature_set = png_permit_mng_features(png_ptr, mask) - mask is a png_uint_32 containing the logical OR of the - features you want to enable. These include - PNG_FLAG_MNG_EMPTY_PLTE - PNG_FLAG_MNG_FILTER_64 - PNG_ALL_MNG_FEATURES - feature_set is a png_32_uint that is the logical AND of - your mask with the set of MNG features that is - supported by the version of libpng that you are using. - -It is an error to use this function when reading or writing a standalone -PNG file with the PNG 8-byte signature. The PNG datastream must be wrapped -in a MNG datastream. As a minimum, it must have the MNG 8-byte signature -and the MHDR and MEND chunks. Libpng does not provide support for these -or any other MNG chunks; your application must provide its own support for -them. You may wish to consider using libmng (available at -http://www.libmng.com) instead. - -VII. Changes to Libpng from version 0.88 - -It should be noted that versions of libpng later than 0.96 are not -distributed by the original libpng author, Guy Schalnat, nor by -Andreas Dilger, who had taken over from Guy during 1996 and 1997, and -distributed versions 0.89 through 0.96, but rather by another member -of the original PNG Group, Glenn Randers-Pehrson. Guy and Andreas are -still alive and well, but they have moved on to other things. - -The old libpng functions png_read_init(), png_write_init(), -png_info_init(), png_read_destroy(), and png_write_destory() have been -moved to PNG_INTERNAL in version 0.95 to discourage their use. These -functions will be removed from libpng version 2.0.0. - -The preferred method of creating and initializing the libpng structures is -via the png_create_read_struct(), png_create_write_struct(), and -png_create_info_struct() because they isolate the size of the structures -from the application, allow version error checking, and also allow the -use of custom error handling routines during the initialization, which -the old functions do not. The functions png_read_destroy() and -png_write_destroy() do not actually free the memory that libpng -allocated for these structs, but just reset the data structures, so they -can be used instead of png_destroy_read_struct() and -png_destroy_write_struct() if you feel there is too much system overhead -allocating and freeing the png_struct for each image read. - -Setting the error callbacks via png_set_message_fn() before -png_read_init() as was suggested in libpng-0.88 is no longer supported -because this caused applications that do not use custom error functions -to fail if the png_ptr was not initialized to zero. It is still possible -to set the error callbacks AFTER png_read_init(), or to change them with -png_set_error_fn(), which is essentially the same function, but with a new -name to force compilation errors with applications that try to use the old -method. - -Starting with version 1.0.7, you can find out which version of the library -you are using at run-time: - - png_uint_32 libpng_vn = png_access_version_number(); - -The number libpng_vn is constructed from the major version, minor -version with leading zero, and release number with leading zero, -(e.g., libpng_vn for version 1.0.7 is 10007). - -You can also check which version of png.h you used when compiling your -application: - - png_uint_32 application_vn = PNG_LIBPNG_VER; - -VIII. Y2K Compliance in libpng - -January 31, 2001 - -Since the PNG Development group is an ad-hoc body, we can't make -an official declaration. - -This is your unofficial assurance that libpng from version 0.71 and -upward through 1.0.9 are Y2K compliant. It is my belief that earlier -versions were also Y2K compliant. - -Libpng only has three year fields. One is a 2-byte unsigned integer that -will hold years up to 65535. The other two hold the date in text -format, and will hold years up to 9999. - -The integer is - "png_uint_16 year" in png_time_struct. - -The strings are - "png_charp time_buffer" in png_struct and - "near_time_buffer", which is a local character string in png.c. - -There are seven time-related functions: - - png_convert_to_rfc_1123() in png.c - (formerly png_convert_to_rfc_1152() in error) - png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c - png_convert_from_time_t() in pngwrite.c - png_get_tIME() in pngget.c - png_handle_tIME() in pngrutil.c, called in pngread.c - png_set_tIME() in pngset.c - png_write_tIME() in pngwutil.c, called in pngwrite.c - -All appear to handle dates properly in a Y2K environment. The -png_convert_from_time_t() function calls gmtime() to convert from system -clock time, which returns (year - 1900), which we properly convert to -the full 4-digit year. There is a possibility that applications using -libpng are not passing 4-digit years into the png_convert_to_rfc_1123() -function, or that they are incorrectly passing only a 2-digit year -instead of "year - 1900" into the png_convert_from_struct_tm() function, -but this is not under our control. The libpng documentation has always -stated that it works with 4-digit years, and the APIs have been -documented as such. - -The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned -integer to hold the year, and can hold years as large as 65535. - -zlib, upon which libpng depends, is also Y2K compliant. It contains -no date-related code. - - - Glenn Randers-Pehrson - libpng maintainer - PNG Development Group diff --git a/libraries/libpng-1.0.9/libpngpf.3 b/libraries/libpng-1.0.9/libpngpf.3 deleted file mode 100644 index 61e8d51..0000000 --- a/libraries/libpng-1.0.9/libpngpf.3 +++ /dev/null @@ -1,549 +0,0 @@ -.TH LIBPNGPF 3 "January 31, 2001" -.SH NAME -libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9 -(private functions) -.SH SYNOPSIS -\fB#include \fP - -\fI\fB - -\fBvoid png_build_gamma_table (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_build_grayscale_palette (int \fP\fIbit_depth\fP\fB, png_colorp \fIpalette\fP\fB);\fP - -\fI\fB - -\fBvoid png_calculate_crc (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIptr\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_check_chunk_name (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIchunk_name\fP\fB);\fP - -\fI\fB - -\fBpng_size_t png_check_keyword (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charpp \fInew_key\fP\fB);\fP - -\fI\fB - -\fBvoid png_combine_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fImask\fP\fB);\fP - -\fI\fB - -\fBvoid png_correct_palette (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fInum_palette\fP\fB);\fP - -\fI\fB - -\fBint png_crc_error (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBint png_crc_finish (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIskip\fP\fB);\fP - -\fI\fB - -\fBvoid png_crc_read (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuf\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_create_struct (int \fP\fItype\fP\fB, png_malloc_ptr \fImalloc_fn\fP\fB);\fP - -\fI\fB - -\fBpng_voidp png_create_struct_2 (int \fItype\fP\fB);\fP - -\fI\fB - -\fBpng_charp png_decompress_chunk (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcomp_type\fP\fB, png_charp \fP\fIchunkdata\fP\fB, png_size_t \fP\fIchunklength\fP\fB, png_size_t \fP\fIprefix_length\fP\fB, png_size_t \fI*data_length\fP\fB);\fP - -\fI\fB - -\fBvoid png_destroy_struct (png_voidp \fIstruct_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_destroy_struct_2 (png_voidp \fP\fIstruct_ptr\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_background (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_16p \fP\fItrans_values\fP\fB, png_color_16p \fP\fIbackground\fP\fB, png_color_16p \fP\fIbackground_1\fP\fB, png_bytep \fP\fIgamma_table\fP\fB, png_bytep \fP\fIgamma_from_1\fP\fB, png_bytep \fP\fIgamma_to_1\fP\fB, png_uint_16pp \fP\fIgamma_16\fP\fB, png_uint_16pp \fP\fIgamma_16_from_1\fP\fB, png_uint_16pp \fP\fIgamma_16_to_1\fP\fB, int \fIgamma_shift\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_bgr (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_chop (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_dither (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIpalette_lookup\fP\fB, png_bytep \fIdither_lookup\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_expand (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_16p \fItrans_value\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_expand_palette (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_colorp \fP\fIpalette\fP\fB, png_bytep \fP\fItrans\fP\fB, int \fInum_trans\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_gamma (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIgamma_table\fP\fB, png_uint_16pp \fP\fIgamma_16_table\fP\fB, int \fIgamma_shift\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_gray_to_rgb (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_invert (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_pack (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fIbit_depth\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_packswap (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_read_filler (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, png_uint_32 \fIflags\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_read_interlace (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fP\fIpass\fP\fB, png_uint_32 \fItransformations\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_read_invert_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_read_swap_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_read_transformations (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBint png_do_rgb_to_gray (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_shift (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_8p \fIbit_depth\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_strip_filler (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fIflags\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_swap (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_unpack (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_unshift (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_8p \fIsig_bits\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_write_interlace (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fIpass\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_write_invert_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_write_swap_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_do_write_transformations (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid *png_far_to_near (png_structp png_ptr,png_voidp \fP\fIptr\fP\fB, int \fIcheck\fP\fB);\fP - -\fI\fB - -\fBvoid png_flush (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBpng_int_32 png_get_int_32 (png_bytep \fIbuf\fP\fB);\fP - -\fI\fB - -\fBpng_uint_16 png_get_uint_16 (png_bytep \fIbuf\fP\fB);\fP - -\fI\fB - -\fBpng_uint_32 png_get_uint_32 (png_bytep \fIbuf\fP\fB);\fP - -\fI\fB - -\fBint png_handle_as_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIchunk_name\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_IEND (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_iTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_handle_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_info_destroy (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_init_read_transformations (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_process_IDAT_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_length\fP\fB);\fP - -\fI\fB - -\fBvoid png_process_some_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_check_crc (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_crc_finish (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_crc_skip (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_fill_buffer (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_handle_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_handle_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_handle_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_have_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_have_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_have_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIrow\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_process_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_read_chunk (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_read_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_read_IDAT (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_read_sig (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_read_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_read_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_restore_buffer (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_length\fP\fB);\fP - -\fI\fB - -\fBvoid png_push_save_buffer (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_filter_row (png_structp \fP\fIpng_ptr\fP\fB, png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIprev_row\fP\fB, int \fIfilter\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_finish_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_push_finish_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_start_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_read_transform_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_reset_crc (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_save_int_32 (png_bytep \fP\fIbuf\fP\fB, png_int_32 \fIi\fP\fB);\fP - -\fI\fB - -\fBvoid png_save_uint_16 (png_bytep \fP\fIbuf\fP\fB, unsigned int \fIi\fP\fB);\fP - -\fI\fB - -\fBvoid png_save_uint_32 (png_bytep \fP\fIbuf\fP\fB, png_uint_32 \fIi\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_color_16p \fP\fIvalues\fP\fB, int \fIcolor_type\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_cHRM (png_structp \fP\fIpng_ptr\fP\fB, double \fP\fIwhite_x\fP\fB, double \fP\fIwhite_y\fP\fB, double \fP\fIred_x\fP\fB, double \fP\fIred_y\fP\fB, double \fP\fIgreen_x\fP\fB, double \fP\fIgreen_y\fP\fB, double \fP\fIblue_x\fP\fB, double \fIblue_y\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwhite_x\fP\fB, png_uint_32 \fP\fIwhite_y\fP\fB, png_uint_32 \fP\fIred_x\fP\fB, png_uint_32 \fP\fIred_y\fP\fB, png_uint_32 \fP\fIgreen_x\fP\fB, png_uint_32 \fP\fIgreen_y\fP\fB, png_uint_32 \fP\fIblue_x\fP\fB, png_uint_32 \fIblue_y\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fBvoid png_write_filtered_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIfiltered_row\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_find_filter (png_structp \fP\fIpng_ptr\fP\fB, png_row_infop \fIrow_info\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_finish_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_gAMA (png_structp \fP\fIpng_ptr\fP\fB, double \fIfile_gamma\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIint_file_gamma\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_uint_16p \fP\fIhist\fP\fB, int \fInum_hist\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_charp \fP\fIprofile\fP\fB, int \fIproflen\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_IDAT (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_IEND (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fP\fIfilter_type\fP\fB, int \fIinterlace_type\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_iTXt (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcompression\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fIlang\fP\fB, png_charp \fP\fItranslated_key\fP\fB, png_charp \fItext)\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIx_offset\fP\fB, png_uint_32 \fP\fIy_offset\fP\fB, int \fIunit_type\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIpurpose\fP\fB, png_int_32 \fP\fIX0\fP\fB, png_int_32 \fP\fIX1\fP\fB, int \fP\fItype\fP\fB, int \fP\fInparams\fP\fB, png_charp \fP\fIunits\fP\fB, png_charpp \fIparams\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIx_pixels_per_unit\fP\fB, png_uint_32 \fP\fIy_pixels_per_unit\fP\fB, int \fIunit_type\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, png_uint_32 \fInum_pal\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_color_8p \fP\fIsbit\fP\fB, int \fIcolor_type\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, double \fP\fIwidth\fP\fB, double \fIheight\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_sCAL_s (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, png_charp \fP\fIwidth\fP\fB, png_charp \fIheight\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_sig (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_sRGB (png_structp \fP\fIpng_ptr\fP\fB, int \fIintent\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_spalette_p \fIpalette\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_start_row (png_structp \fIpng_ptr\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fItext\fP\fB, png_size_t \fItext_len\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fItrans\fP\fB, png_color_16p \fP\fIvalues\fP\fB, int \fP\fInumber\fP\fB, int \fIcolor_type\fP\fB);\fP - -\fI\fB - -\fBvoid png_write_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fItext\fP\fB, png_size_t \fP\fItext_len\fP\fB, int \fIcompression\fP\fB);\fP - -\fI\fB - -\fBvoidpf png_zalloc (voidpf \fP\fIpng_ptr\fP\fB, uInt \fP\fIitems\fP\fB, uInt \fIsize\fP\fB);\fP - -\fI\fB - -\fBvoid png_zfree (voidpf \fP\fIpng_ptr\fP\fB, voidpf \fIptr\fP\fB);\fP - -\fI\fB - -.SH DESCRIPTION -The functions listed above are used privately by libpng -and are not recommended for use by applications. They -are listed alphabetically here as an aid to libpng maintainers. -See png.h for more information on these functions. - -.SH SEE ALSO -libpng(3), png(5) -.SH AUTHOR -Glenn Randers-Pehrson diff --git a/libraries/libpng-1.0.9/png.5 b/libraries/libpng-1.0.9/png.5 deleted file mode 100644 index 493bbd5..0000000 --- a/libraries/libpng-1.0.9/png.5 +++ /dev/null @@ -1,60 +0,0 @@ -.TH PNG 5 "January 31, 2001" -.SH NAME -png \- Portable Network Graphics (PNG) format -.SH DESCRIPTION -PNG (Portable Network Graphics) is an extensible file format for the -lossless, portable, well-compressed storage of raster images. PNG provides -a patent-free replacement for GIF and can also replace many -common uses of TIFF. Indexed-color, grayscale, and truecolor images are -supported, plus an optional alpha channel. Sample depths range from -1 to 16 bits. -.br - -PNG is designed to work well in online viewing applications, such as the -World Wide Web, so it is fully streamable with a progressive display -option. PNG is robust, providing both full file integrity checking and -fast, simple detection of common transmission errors. Also, PNG can store -gamma and chromaticity data for improved color matching on heterogeneous -platforms. - -.SH "SEE ALSO" -.IR libpng(3), zlib(3), deflate(5), and zlib(5) -.LP -PNG 1.2 specification, July 1999: -.IP -.br -http://www.libpng.org/pub/png -.br -or ftp://ftp.uu.net/graphics/png/documents -.LP -PNG 1.0 specification, October 1996: -.IP -.br -RFC 2083 -.IP -.br -ftp://ds.internic.net/rfc/rfc2083.txt -.br -or (as a W3C Recommendation) at -.br -http://www.w3.org/TR/REC-png.html -.SH AUTHORS -This man page: Glenn Randers-Pehrson -.LP -Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): -Glenn Randers-Pehrson and others (png-list@ccrc.wustl.edu). -.LP -Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): -Thomas Boutell and others (png-list@ccrc.wustl.edu). -.LP - - -.SH COPYRIGHT NOTICE -The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson. -See the specification for conditions of use and distribution. -.LP -The PNG-1.0 specification is copyright (c) 1996 Massachussets Institute of -Technology. See the specification for conditions of use and distribution. -.LP -.\" end of man page - diff --git a/libraries/libpng-1.0.9/png.c b/libraries/libpng-1.0.9/png.c deleted file mode 100644 index 1ba125f..0000000 --- a/libraries/libpng-1.0.9/png.c +++ /dev/null @@ -1,711 +0,0 @@ - -/* png.c - location for general purpose libpng functions - * - * libpng version 1.0.9 - January 31, 2001 - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - */ - -#define PNG_INTERNAL -#define PNG_NO_EXTERN -#include "png.h" - -/* Generate a compiler error if there is an old png.h in the search path. */ -typedef version_1_0_9 Your_png_h_is_not_version_1_0_9; - -/* Version information for C files. This had better match the version - * string defined in png.h. */ - -#ifdef PNG_USE_GLOBAL_ARRAYS -/* png_libpng_ver was changed to a function in version 1.0.5c */ -const char png_libpng_ver[18] = "1.0.9"; - -/* png_sig was changed to a function in version 1.0.5c */ -/* Place to hold the signature string for a PNG file. */ -const png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; - -/* Invoke global declarations for constant strings for known chunk types */ -PNG_IHDR; -PNG_IDAT; -PNG_IEND; -PNG_PLTE; -PNG_bKGD; -PNG_cHRM; -PNG_gAMA; -PNG_hIST; -PNG_iCCP; -PNG_iTXt; -PNG_oFFs; -PNG_pCAL; -PNG_sCAL; -PNG_pHYs; -PNG_sBIT; -PNG_sPLT; -PNG_sRGB; -PNG_tEXt; -PNG_tIME; -PNG_tRNS; -PNG_zTXt; - -/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - -/* start of interlace block */ -const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; - -/* offset to next interlace block */ -const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - -/* start of interlace block in the y direction */ -const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; - -/* offset to next interlace block in the y direction */ -const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; - -/* width of interlace block (used in assembler routines only) */ -#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW -const int FARDATA png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; -#endif - -/* Height of interlace block. This is not currently used - if you need - * it, uncomment it here and in png.h -const int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; -*/ - -/* Mask to determine which pixels are valid in a pass */ -const int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; - -/* Mask to determine which pixels to overwrite while displaying */ -const int FARDATA png_pass_dsp_mask[] - = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; - -#endif - -/* Tells libpng that we have already handled the first "num_bytes" bytes - * of the PNG file signature. If the PNG data is embedded into another - * stream we can set num_bytes = 8 so that libpng will not attempt to read - * or write any of the magic bytes before it starts on the IHDR. - */ - -void PNGAPI -png_set_sig_bytes(png_structp png_ptr, int num_bytes) -{ - png_debug(1, "in png_set_sig_bytes\n"); - if (num_bytes > 8) - png_error(png_ptr, "Too many bytes for PNG signature."); - - png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes); -} - -/* Checks whether the supplied bytes match the PNG signature. We allow - * checking less than the full 8-byte signature so that those apps that - * already read the first few bytes of a file to determine the file type - * can simply check the remaining bytes for extra assurance. Returns - * an integer less than, equal to, or greater than zero if sig is found, - * respectively, to be less than, to match, or be greater than the correct - * PNG signature (this is the same behaviour as strcmp, memcmp, etc). - */ -int PNGAPI -png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check) -{ - png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; - if (num_to_check > 8) - num_to_check = 8; - else if (num_to_check < 1) - return (0); - - if (start > 7) - return (0); - - if (start + num_to_check > 8) - num_to_check = 8 - start; - - return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check))); -} - -/* (Obsolete) function to check signature bytes. It does not allow one - * to check a partial signature. This function might be removed in the - * future - use png_sig_cmp(). Returns true (nonzero) if the file is a PNG. - */ -int PNGAPI -png_check_sig(png_bytep sig, int num) -{ - return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num)); -} - -/* Function to allocate memory for zlib and clear it to 0. */ -voidpf PNGAPI -png_zalloc(voidpf png_ptr, uInt items, uInt size) -{ - png_uint_32 num_bytes = (png_uint_32)items * size; - png_voidp ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); - -#ifndef PNG_NO_ZALLOC_ZERO - if (num_bytes > (png_uint_32)0x8000L) - { - png_memset(ptr, 0, (png_size_t)0x8000L); - png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0, - (png_size_t)(num_bytes - (png_uint_32)0x8000L)); - } - else - { - png_memset(ptr, 0, (png_size_t)num_bytes); - } -#endif - return ((voidpf)ptr); -} - -/* function to free memory for zlib */ -void PNGAPI -png_zfree(voidpf png_ptr, voidpf ptr) -{ - png_free((png_structp)png_ptr, (png_voidp)ptr); -} - -/* Reset the CRC variable to 32 bits of 1's. Care must be taken - * in case CRC is > 32 bits to leave the top bits 0. - */ -void /* PRIVATE */ -png_reset_crc(png_structp png_ptr) -{ - png_ptr->crc = crc32(0, Z_NULL, 0); -} - -/* Calculate the CRC over a section of data. We can only pass as - * much data to this routine as the largest single buffer size. We - * also check that this data will actually be used before going to the - * trouble of calculating it. - */ -void /* PRIVATE */ -png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length) -{ - int need_crc = 1; - - if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ - { - if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == - (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) - need_crc = 0; - } - else /* critical */ - { - if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) - need_crc = 0; - } - - if (need_crc) - png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length); -} - -/* Allocate the memory for an info_struct for the application. We don't - * really need the png_ptr, but it could potentially be useful in the - * future. This should be used in favour of malloc(sizeof(png_info)) - * and png_info_init() so that applications that want to use a shared - * libpng don't have to be recompiled if png_info changes size. - */ -png_infop PNGAPI -png_create_info_struct(png_structp png_ptr) -{ - png_infop info_ptr; - - png_debug(1, "in png_create_info_struct\n"); - if(png_ptr == NULL) return (NULL); -#ifdef PNG_USER_MEM_SUPPORTED - if ((info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, - png_ptr->malloc_fn)) != NULL) -#else - if ((info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO)) != NULL) -#endif - { - png_info_init(info_ptr); - } - - return (info_ptr); -} - -/* This function frees the memory associated with a single info struct. - * Normally, one would use either png_destroy_read_struct() or - * png_destroy_write_struct() to free an info struct, but this may be - * useful for some applications. - */ -void PNGAPI -png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) -{ - png_infop info_ptr = NULL; - - png_debug(1, "in png_destroy_info_struct\n"); - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (info_ptr != NULL) - { - png_info_destroy(png_ptr, info_ptr); - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = (png_infop)NULL; - } -} - -/* Initialize the info structure. This is now an internal function (0.89) - * and applications using it are urged to use png_create_info_struct() - * instead. - */ -void PNGAPI -png_info_init(png_infop info_ptr) -{ - png_debug(1, "in png_info_init\n"); - /* set everything to 0 */ - png_memset(info_ptr, 0, sizeof (png_info)); -} - -#ifdef PNG_FREE_ME_SUPPORTED -void PNGAPI -png_data_freer(png_structp png_ptr, png_infop info_ptr, - int freer, png_uint_32 mask) -{ - png_debug(1, "in png_data_freer\n"); - if (png_ptr == NULL || info_ptr == NULL) - return; - if(freer == PNG_DESTROY_WILL_FREE_DATA) - info_ptr->free_me |= mask; - else if(freer == PNG_USER_WILL_FREE_DATA) - info_ptr->free_me &= ~mask; - else - png_warning(png_ptr, - "Unknown freer parameter in png_data_freer."); -} -#endif - -void PNGAPI -png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, int num) -{ - png_debug(1, "in png_free_data\n"); - if (png_ptr == NULL || info_ptr == NULL) - return; - -#if defined(PNG_TEXT_SUPPORTED) -/* free text item num or (if num == -1) all text items */ -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_TEXT) & info_ptr->free_me) -#else -if (mask & PNG_FREE_TEXT) -#endif -{ - if (num != -1) - { - if (info_ptr->text && info_ptr->text[num].key) - { - png_free(png_ptr, info_ptr->text[num].key); - info_ptr->text[num].key = NULL; - } - } - else - { - int i; - for (i = 0; i < info_ptr->num_text; i++) - png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i); - png_free(png_ptr, info_ptr->text); - info_ptr->text = NULL; - info_ptr->num_text=0; - } -} -#endif - -#if defined(PNG_tRNS_SUPPORTED) -/* free any tRNS entry */ -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_TRNS) & info_ptr->free_me) -#else -if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS)) -#endif -{ - png_free(png_ptr, info_ptr->trans); - info_ptr->valid &= ~PNG_INFO_tRNS; - info_ptr->trans = NULL; -} -#endif - -#if defined(PNG_sCAL_SUPPORTED) -/* free any sCAL entry */ -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_SCAL) & info_ptr->free_me) -#else -if (mask & PNG_FREE_SCAL) -#endif -{ -#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) - png_free(png_ptr, info_ptr->scal_s_width); - png_free(png_ptr, info_ptr->scal_s_height); - info_ptr->scal_s_width = NULL; - info_ptr->scal_s_height = NULL; -#endif - info_ptr->valid &= ~PNG_INFO_sCAL; -} -#endif - -#if defined(PNG_pCAL_SUPPORTED) -/* free any pCAL entry */ -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_PCAL) & info_ptr->free_me) -#else -if (mask & PNG_FREE_PCAL) -#endif -{ - png_free(png_ptr, info_ptr->pcal_purpose); - png_free(png_ptr, info_ptr->pcal_units); - info_ptr->pcal_purpose = NULL; - info_ptr->pcal_units = NULL; - if (info_ptr->pcal_params != NULL) - { - int i; - for (i = 0; i < (int)info_ptr->pcal_nparams; i++) - { - png_free(png_ptr, info_ptr->pcal_params[i]); - info_ptr->pcal_params[i]=NULL; - } - png_free(png_ptr, info_ptr->pcal_params); - info_ptr->pcal_params = NULL; - } - info_ptr->valid &= ~PNG_INFO_pCAL; -} -#endif - -#if defined(PNG_iCCP_SUPPORTED) -/* free any iCCP entry */ -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_ICCP) & info_ptr->free_me) -#else -if (mask & PNG_FREE_ICCP) -#endif -{ - png_free(png_ptr, info_ptr->iccp_name); - png_free(png_ptr, info_ptr->iccp_profile); - info_ptr->iccp_name = NULL; - info_ptr->iccp_profile = NULL; - info_ptr->valid &= ~PNG_INFO_iCCP; -} -#endif - -#if defined(PNG_sPLT_SUPPORTED) -/* free a given sPLT entry, or (if num == -1) all sPLT entries */ -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_SPLT) & info_ptr->free_me) -#else -if (mask & PNG_FREE_SPLT) -#endif -{ - if (num != -1) - { - if(info_ptr->splt_palettes) - { - png_free(png_ptr, info_ptr->splt_palettes[num].name); - png_free(png_ptr, info_ptr->splt_palettes[num].entries); - info_ptr->splt_palettes[num].name = NULL; - info_ptr->splt_palettes[num].entries = NULL; - } - } - else - { - if(info_ptr->splt_palettes_num) - { - int i; - for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) - png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i); - - png_free(png_ptr, info_ptr->splt_palettes); - info_ptr->splt_palettes = NULL; - info_ptr->splt_palettes_num = 0; - } - info_ptr->valid &= ~PNG_INFO_sPLT; - } -} -#endif - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_UNKN) & info_ptr->free_me) -#else -if (mask & PNG_FREE_UNKN) -#endif -{ - if (num != -1) - { - if(info_ptr->unknown_chunks) - { - png_free(png_ptr, info_ptr->unknown_chunks[num].data); - info_ptr->unknown_chunks[num].data = NULL; - } - } - else - { - int i; - - if(info_ptr->unknown_chunks_num) - { - for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++) - png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i); - - png_free(png_ptr, info_ptr->unknown_chunks); - info_ptr->unknown_chunks = NULL; - info_ptr->unknown_chunks_num = 0; - } - } -} -#endif - -#if defined(PNG_hIST_SUPPORTED) -/* free any hIST entry */ -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_HIST) & info_ptr->free_me) -#else -if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST)) -#endif -{ - png_free(png_ptr, info_ptr->hist); - info_ptr->hist = NULL; - info_ptr->valid &= ~PNG_INFO_hIST; -} -#endif - -/* free any PLTE entry that was internally allocated */ -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_PLTE) & info_ptr->free_me) -#else -if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE)) -#endif -{ - png_zfree(png_ptr, info_ptr->palette); - info_ptr->palette = NULL; - info_ptr->valid &= ~PNG_INFO_PLTE; - info_ptr->num_palette = 0; -} - -#if defined(PNG_INFO_IMAGE_SUPPORTED) -/* free any image bits attached to the info structure */ -#ifdef PNG_FREE_ME_SUPPORTED -if ((mask & PNG_FREE_ROWS) & info_ptr->free_me) -#else -if (mask & PNG_FREE_ROWS) -#endif -{ - if(info_ptr->row_pointers) - { - int row; - for (row = 0; row < (int)info_ptr->height; row++) - { - png_free(png_ptr, info_ptr->row_pointers[row]); - info_ptr->row_pointers[row]=NULL; - } - png_free(png_ptr, info_ptr->row_pointers); - info_ptr->row_pointers=NULL; - } - info_ptr->valid &= ~PNG_INFO_IDAT; -} -#endif - -#ifdef PNG_FREE_ME_SUPPORTED - if(num == -1) - info_ptr->free_me &= ~mask; - else - info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL); -#endif -} - -/* This is an internal routine to free any memory that the info struct is - * pointing to before re-using it or freeing the struct itself. Recall - * that png_free() checks for NULL pointers for us. - */ -void /* PRIVATE */ -png_info_destroy(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_info_destroy\n"); - - png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) - if (png_ptr->num_chunk_list) - { - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->chunk_list=NULL; - png_ptr->num_chunk_list=0; - } -#endif - - png_info_init(info_ptr); -} - -/* This function returns a pointer to the io_ptr associated with the user - * functions. The application should free any memory associated with this - * pointer before png_write_destroy() or png_read_destroy() are called. - */ -png_voidp PNGAPI -png_get_io_ptr(png_structp png_ptr) -{ - return (png_ptr->io_ptr); -} - -#if !defined(PNG_NO_STDIO) -/* Initialize the default input/output functions for the PNG file. If you - * use your own read or write routines, you can call either png_set_read_fn() - * or png_set_write_fn() instead of png_init_io(). If you have defined - * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't - * necessarily available. - */ -void PNGAPI -png_init_io(png_structp png_ptr, png_FILE_p fp) -{ - png_debug(1, "in png_init_io\n"); - png_ptr->io_ptr = (png_voidp)fp; -} -#endif - -#if defined(PNG_TIME_RFC1123_SUPPORTED) -/* Convert the supplied time into an RFC 1123 string suitable for use in - * a "Creation Time" or other text-based time string. - */ -png_charp PNGAPI -png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime) -{ - static PNG_CONST char short_months[12][4] = - {"Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; - - if (png_ptr->time_buffer == NULL) - { - png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29* - sizeof(char))); - } - -#if defined(_WIN32_WCE) - { - wchar_t time_buf[29]; - wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"), - ptime->day % 32, short_months[(ptime->month - 1) % 12], - ptime->year, ptime->hour % 24, ptime->minute % 60, - ptime->second % 61); - WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29, - NULL, NULL); - } -#else -#ifdef USE_FAR_KEYWORD - { - char near_time_buf[29]; - sprintf(near_time_buf, "%d %s %d %02d:%02d:%02d +0000", - ptime->day % 32, short_months[(ptime->month - 1) % 12], - ptime->year, ptime->hour % 24, ptime->minute % 60, - ptime->second % 61); - png_memcpy(png_ptr->time_buffer, near_time_buf, - 29*sizeof(char)); - } -#else - sprintf(png_ptr->time_buffer, "%d %s %d %02d:%02d:%02d +0000", - ptime->day % 32, short_months[(ptime->month - 1) % 12], - ptime->year, ptime->hour % 24, ptime->minute % 60, - ptime->second % 61); -#endif -#endif /* _WIN32_WCE */ - return ((png_charp)png_ptr->time_buffer); -} -#endif /* PNG_TIME_RFC1123_SUPPORTED */ - -#if 0 -/* Signature string for a PNG file. */ -png_bytep PNGAPI -png_sig_bytes(void) -{ - return ((png_bytep)"\211\120\116\107\015\012\032\012"); -} -#endif - -png_charp PNGAPI -png_get_copyright(png_structp png_ptr) -{ - if (png_ptr != NULL || png_ptr == NULL) /* silence compiler warning */ - return ((png_charp) "\n libpng version 1.0.9 - January 31, 2001\n\ - Copyright (c) 1998-2001 Glenn Randers-Pehrson\n\ - Copyright (c) 1996, 1997 Andreas Dilger\n\ - Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.\n"); - return ((png_charp) ""); -} - -/* The following return the library version as a short string in the - * format 1.0.0 through 99.99.99zz. To get the version of *.h files used - * with your application, print out PNG_LIBPNG_VER_STRING, which is defined - * in png.h. - */ - -png_charp PNGAPI -png_get_libpng_ver(png_structp png_ptr) -{ - /* Version of *.c files used when building libpng */ - if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */ - return((png_charp) "1.0.9"); - return((png_charp) "1.0.9"); -} - -png_charp PNGAPI -png_get_header_ver(png_structp png_ptr) -{ - /* Version of *.h files used when building libpng */ - if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */ - return((png_charp) PNG_LIBPNG_VER_STRING); - return((png_charp) PNG_LIBPNG_VER_STRING); -} - -png_charp PNGAPI -png_get_header_version(png_structp png_ptr) -{ - /* Returns longer string containing both version and date */ - if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */ - return((png_charp) PNG_HEADER_VERSION_STRING); - return((png_charp) PNG_HEADER_VERSION_STRING); -} - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -int PNGAPI -png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name) -{ - /* check chunk_name and return "keep" value if it's on the list, else 0 */ - int i; - png_bytep p; - if((png_ptr == NULL && chunk_name == NULL) || png_ptr->num_chunk_list<=0) - return 0; - p=png_ptr->chunk_list+png_ptr->num_chunk_list*5-5; - for (i = png_ptr->num_chunk_list; i; i--, p-=5) - if (!png_memcmp(chunk_name, p, 4)) - return ((int)*(p+4)); - return 0; -} -#endif - -/* This function, added to libpng-1.0.6g, is untested. */ -int PNGAPI -png_reset_zstream(png_structp png_ptr) -{ - return (inflateReset(&png_ptr->zstream)); -} - -/* This function was added to libpng-1.0.7 */ -png_uint_32 PNGAPI -png_access_version_number(void) -{ - /* Version of *.c files used when building libpng */ - return((png_uint_32) 10009L); -} - - -#if 0 /* delay this until version 1.2.0 */ -/* this function was added to libpng 1.0.9 (porting aid to libpng-1.2.0) */ -#ifndef PNG_ASSEMBLER_CODE_SUPPORTED -int PNGAPI -png_mmx_support(void) -{ - return -1; -} -#endif -#endif /* 0 */ diff --git a/libraries/libpng-1.0.9/png.dsp b/libraries/libpng-1.0.9/png.dsp deleted file mode 100644 index 811cd77..0000000 --- a/libraries/libpng-1.0.9/png.dsp +++ /dev/null @@ -1,156 +0,0 @@ -# Microsoft Developer Studio Project File - Name="png" - Package Owner=<4> -# Microsoft Developer Studio Generated Build File, Format Version 6.00 -# ** DO NOT EDIT ** - -# TARGTYPE "Win32 (x86) Static Library" 0x0104 - -CFG=png - Win32 Debug -!MESSAGE This is not a valid makefile. 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- -############################################################################### - -Project: "png"=".\png.dsp" - Package Owner=<4> - -Package=<5> -{{{ -}}} - -Package=<4> -{{{ -}}} - -############################################################################### - -Global: - -Package=<5> -{{{ -}}} - -Package=<3> -{{{ -}}} - -############################################################################### - diff --git a/libraries/libpng-1.0.9/png.h b/libraries/libpng-1.0.9/png.h deleted file mode 100644 index 236c5d7..0000000 --- a/libraries/libpng-1.0.9/png.h +++ /dev/null @@ -1,3042 +0,0 @@ - -/* png.h - header file for PNG reference library - * - * libpng version 1.0.9 - January 31, 2001 - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * Authors and maintainers: - * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat - * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger - * libpng versions 0.97, January 1998, through 1.0.9 - January 31, 2001: Glenn - * See also "Contributing Authors", below. - * - * Note about libpng version numbers: - * - * Due to various miscommunications, unforeseen code incompatibilities - * and occasional factors outside the authors' control, version numbering - * on the library has not always been consistent and straightforward. - * The following table summarizes matters since version 0.89c, which was - * the first widely used release: - * - * source png.h png.h shared-lib - * version string int version - * ------- ------ ----- ---------- - * 0.89c "1.0 beta 3" 0.89 89 1.0.89 - * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90] - * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95] - * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96] - * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97] - * 0.97c 0.97 97 2.0.97 - * 0.98 0.98 98 2.0.98 - * 0.99 0.99 98 2.0.99 - * 0.99a-m 0.99 99 2.0.99 - * 1.00 1.00 100 2.1.0 [100 should be 10000] - * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000] - * 1.0.1 png.h string is 10001 2.1.0 - * 1.0.1a-e identical to the 10002 from here on, the shared library - * 1.0.2 source version) 10002 is 2.V where V is the source code - * 1.0.2a-b 10003 version, except as noted. - * 1.0.3 10003 - * 1.0.3a-d 10004 - * 1.0.4 10004 - * 1.0.4a-f 10005 - * 1.0.5 (+ 2 patches) 10005 - * 1.0.5a-d 10006 - * 1.0.5e-r 10100 (not source compatible) - * 1.0.5s-v 10006 (not binary compatible) - * 1.0.6 (+ 3 patches) 10006 (still binary incompatible) - * 1.0.6d-f 10007 (still binary incompatible) - * 1.0.6g 10007 - * 1.0.6h 10007 10.6h (testing xy.z so-numbering) - * 1.0.6i 10007 10.6i - * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0) - * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible) - * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible) - * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible) - * 1.0.7 1 10007 (still compatible) - * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4 - * 1.0.8rc1 1 10008 2.1.0.8rc1 - * 1.0.8 1 10008 2.1.0.8 - * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6 - * 1.0.9rc1 1 10009 2.1.0.9rc1 - * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10 - * 1.0.9rc2 1 10009 2.1.0.9rc2 - * 1.0.9 1 10009 2.1.0.9 - * - * Henceforth the source version will match the shared-library major - * and minor numbers; the shared-library major version number will be - * used for changes in backward compatibility, as it is intended. The - * PNG_LIBPNG_VER macro, which is not used within libpng but is available - * for applications, is an unsigned integer of the form xyyzz corresponding - * to the source version x.y.z (leading zeros in y and z). Beta versions - * were given the previous public release number plus a letter, until - * version 1.0.6j; from then on they were given the upcoming public - * release number plus "betaNN" or "rcN". - * - * Binary incompatibility exists only when applications make direct access - * to the info_ptr or png_ptr members through png.h, and the compiled - * application is loaded with a different version of the library. - * - * DLLNUM will change each time there are forward or backward changes - * in binary compatibility (e.g., when a new feature is added). - * - * See libpng.txt or libpng.3 for more information. The PNG specification - * is available as RFC 2083 - * and as a W3C Recommendation - */ - -/* - * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: - * - * If you modify libpng you may insert additional notices immediately following - * this sentence. - * - * libpng versions 1.0.7, July 1, 2000, through 1.0.9, January 31, 2001, are - * Copyright (c) 2000, 2001 Glenn Randers-Pehrson, and are - * distributed according to the same disclaimer and license as libpng-1.0.6 - * with the following individuals added to the list of Contributing Authors - * - * Simon-Pierre Cadieux - * Eric S. Raymond - * Gilles Vollant - * - * and with the following additions to the disclaimer: - * - * There is no warranty against interference with your enjoyment of the - * library or against infringement. There is no warranty that our - * efforts or the library will fulfill any of your particular purposes - * or needs. This library is provided with all faults, and the entire - * risk of satisfactory quality, performance, accuracy, and effort is with - * the user. - * - * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are - * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson - * Distributed according to the same disclaimer and license as libpng-0.96, - * with the following individuals added to the list of Contributing Authors: - * - * Tom Lane - * Glenn Randers-Pehrson - * Willem van Schaik - * - * libpng versions 0.89, June 1996, through 0.96, May 1997, are - * Copyright (c) 1996, 1997 Andreas Dilger - * Distributed according to the same disclaimer and license as libpng-0.88, - * with the following individuals added to the list of Contributing Authors: - * - * John Bowler - * Kevin Bracey - * Sam Bushell - * Magnus Holmgren - * Greg Roelofs - * Tom Tanner - * - * libpng versions 0.5, May 1995, through 0.88, January 1996, are - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * - * For the purposes of this copyright and license, "Contributing Authors" - * is defined as the following set of individuals: - * - * Andreas Dilger - * Dave Martindale - * Guy Eric Schalnat - * Paul Schmidt - * Tim Wegner - * - * The PNG Reference Library is supplied "AS IS". The Contributing Authors - * and Group 42, Inc. disclaim all warranties, expressed or implied, - * including, without limitation, the warranties of merchantability and of - * fitness for any purpose. The Contributing Authors and Group 42, Inc. - * assume no liability for direct, indirect, incidental, special, exemplary, - * or consequential damages, which may result from the use of the PNG - * Reference Library, even if advised of the possibility of such damage. - * - * Permission is hereby granted to use, copy, modify, and distribute this - * source code, or portions hereof, for any purpose, without fee, subject - * to the following restrictions: - * - * 1. The origin of this source code must not be misrepresented. - * - * 2. Altered versions must be plainly marked as such and must not - * be misrepresented as being the original source. - * - * 3. This Copyright notice may not be removed or altered from any - * source or altered source distribution. - * - * The Contributing Authors and Group 42, Inc. specifically permit, without - * fee, and encourage the use of this source code as a component to - * supporting the PNG file format in commercial products. If you use this - * source code in a product, acknowledgment is not required but would be - * appreciated. - */ - -/* - * A "png_get_copyright" function is available, for convenient use in "about" - * boxes and the like: - * - * printf("%s",png_get_copyright(NULL)); - * - * Also, the PNG logo (in PNG format, of course) is supplied in the - * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). - */ - -/* - * Libpng is OSI Certified Open Source Software. OSI Certified is a - * certification mark of the Open Source Initiative. - */ - -/* - * The contributing authors would like to thank all those who helped - * with testing, bug fixes, and patience. This wouldn't have been - * possible without all of you. - * - * Thanks to Frank J. T. Wojcik for helping with the documentation. - */ - -/* - * Y2K compliance in libpng: - * ========================= - * - * January 31, 2001 - * - * Since the PNG Development group is an ad-hoc body, we can't make - * an official declaration. - * - * This is your unofficial assurance that libpng from version 0.71 and - * upward through 1.0.9 are Y2K compliant. It is my belief that earlier - * versions were also Y2K compliant. - * - * Libpng only has three year fields. One is a 2-byte unsigned integer - * that will hold years up to 65535. The other two hold the date in text - * format, and will hold years up to 9999. - * - * The integer is - * "png_uint_16 year" in png_time_struct. - * - * The strings are - * "png_charp time_buffer" in png_struct and - * "near_time_buffer", which is a local character string in png.c. - * - * There are seven time-related functions: - * png.c: png_convert_to_rfc_1123() in png.c - * (formerly png_convert_to_rfc_1152() in error) - * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c - * png_convert_from_time_t() in pngwrite.c - * png_get_tIME() in pngget.c - * png_handle_tIME() in pngrutil.c, called in pngread.c - * png_set_tIME() in pngset.c - * png_write_tIME() in pngwutil.c, called in pngwrite.c - * - * All handle dates properly in a Y2K environment. The - * png_convert_from_time_t() function calls gmtime() to convert from system - * clock time, which returns (year - 1900), which we properly convert to - * the full 4-digit year. There is a possibility that applications using - * libpng are not passing 4-digit years into the png_convert_to_rfc_1123() - * function, or that they are incorrectly passing only a 2-digit year - * instead of "year - 1900" into the png_convert_from_struct_tm() function, - * but this is not under our control. The libpng documentation has always - * stated that it works with 4-digit years, and the APIs have been - * documented as such. - * - * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned - * integer to hold the year, and can hold years as large as 65535. - * - * zlib, upon which libpng depends, is also Y2K compliant. It contains - * no date-related code. - * - * Glenn Randers-Pehrson - * libpng maintainer - * PNG Development Group - */ - -#ifndef PNG_H -#define PNG_H - -/* This is not the place to learn how to use libpng. The file libpng.txt - * describes how to use libpng, and the file example.c summarizes it - * with some code on which to build. This file is useful for looking - * at the actual function definitions and structure components. - */ - -/* Version information for png.h - this should match the version in png.c */ -#define PNG_LIBPNG_VER_STRING "1.0.9" - -#define PNG_LIBPNG_VER_SONUM 2 -#define PNG_LIBPNG_VER_DLLNUM %DLLNUM% - -/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ -#define PNG_LIBPNG_VER_MAJOR 1 -#define PNG_LIBPNG_VER_MINOR 0 -#define PNG_LIBPNG_VER_RELEASE 9 -/* This should match the numeric part of the final component of - * PNG_LIBPNG_VER_STRING, omitting any leading zero: */ - -#define PNG_LIBPNG_VER_BUILD 0 - -#define PNG_LIBPNG_BUILD_ALPHA 1 -#define PNG_LIBPNG_BUILD_BETA 2 -#define PNG_LIBPNG_BUILD_RC 3 -#define PNG_LIBPNG_BUILD_STABLE 4 -#define PNG_LIBPNG_BUILD_TYPEMASK 7 -#define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with STABLE only */ -#define PNG_LIBPNG_BUILD_TYPE 4 - -/* Careful here. At one time, Guy wanted to use 082, but that would be octal. - * We must not include leading zeros. - * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only - * version 1.0.0 was mis-numbered 100 instead of 10000). From - * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release */ -#define PNG_LIBPNG_VER 10009 /* 1.0.9 */ - -#ifndef PNG_VERSION_INFO_ONLY - -/* include the compression library's header */ -#include "zlib.h" - -/* include all user configurable info, including optional assembler routines */ -#include "pngconf.h" - -/* Inhibit C++ name-mangling for libpng functions but not for system calls. */ -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - -/* This file is arranged in several sections. The first section contains - * structure and type definitions. The second section contains the external - * library functions, while the third has the internal library functions, - * which applications aren't expected to use directly. - */ - -/* variables declared in png.c - only it needs to define PNG_NO_EXTERN */ -#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN) -/* Version information for C files, stored in png.c. This had better match - * the version above. - */ -#ifdef PNG_USE_GLOBAL_ARRAYS -PNG_EXPORT_VAR (const char) png_libpng_ver[18]; - /* need room for 99.99.99beta99z*/ -#else -#define png_libpng_ver png_get_header_ver(NULL) -#endif - -#ifdef PNG_USE_GLOBAL_ARRAYS -/* This was removed in version 1.0.5c */ -/* Structures to facilitate easy interlacing. See png.c for more details */ -PNG_EXPORT_VAR (const int FARDATA) png_pass_start[7]; -PNG_EXPORT_VAR (const int FARDATA) png_pass_inc[7]; -PNG_EXPORT_VAR (const int FARDATA) png_pass_ystart[7]; -PNG_EXPORT_VAR (const int FARDATA) png_pass_yinc[7]; -PNG_EXPORT_VAR (const int FARDATA) png_pass_mask[7]; -PNG_EXPORT_VAR (const int FARDATA) png_pass_dsp_mask[7]; -#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW -PNG_EXPORT_VAR (const int FARDATA) png_pass_width[7]; -#endif -/* This isn't currently used. If you need it, see png.c for more details. -PNG_EXPORT_VAR (const int FARDATA) png_pass_height[7]; -*/ -#endif - -#endif /* PNG_NO_EXTERN */ - -/* Three color definitions. The order of the red, green, and blue, (and the - * exact size) is not important, although the size of the fields need to - * be png_byte or png_uint_16 (as defined below). - */ -typedef struct png_color_struct -{ - png_byte red; - png_byte green; - png_byte blue; -} png_color; -typedef png_color FAR * png_colorp; -typedef png_color FAR * FAR * png_colorpp; - -typedef struct png_color_16_struct -{ - png_byte index; /* used for palette files */ - png_uint_16 red; /* for use in red green blue files */ - png_uint_16 green; - png_uint_16 blue; - png_uint_16 gray; /* for use in grayscale files */ -} png_color_16; -typedef png_color_16 FAR * png_color_16p; -typedef png_color_16 FAR * FAR * png_color_16pp; - -typedef struct png_color_8_struct -{ - png_byte red; /* for use in red green blue files */ - png_byte green; - png_byte blue; - png_byte gray; /* for use in grayscale files */ - png_byte alpha; /* for alpha channel files */ -} png_color_8; -typedef png_color_8 FAR * png_color_8p; -typedef png_color_8 FAR * FAR * png_color_8pp; - -/* - * The following two structures are used for the in-core representation - * of sPLT chunks. - */ -typedef struct png_sPLT_entry_struct -{ - png_uint_16 red; - png_uint_16 green; - png_uint_16 blue; - png_uint_16 alpha; - png_uint_16 frequency; -} png_sPLT_entry; -typedef png_sPLT_entry FAR * png_sPLT_entryp; -typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; - -/* When the depth of the sPLT palette is 8 bits, the color and alpha samples - * occupy the LSB of their respective members, and the MSB of each member - * is zero-filled. The frequency member always occupies the full 16 bits. - */ - -typedef struct png_sPLT_struct -{ - png_charp name; /* palette name */ - png_byte depth; /* depth of palette samples */ - png_sPLT_entryp entries; /* palette entries */ - png_int_32 nentries; /* number of palette entries */ -} png_sPLT_t; -typedef png_sPLT_t FAR * png_sPLT_tp; -typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; - -#ifdef PNG_TEXT_SUPPORTED -/* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, - * and whether that contents is compressed or not. The "key" field - * points to a regular zero-terminated C string. The "text", "lang", and - * "lang_key" fields can be regular C strings, empty strings, or NULL pointers. - * However, the * structure returned by png_get_text() will always contain - * regular zero-terminated C strings (possibly empty), never NULL pointers, - * so they can be safely used in printf() and other string-handling functions. - */ -typedef struct png_text_struct -{ - int compression; /* compression value: - -1: tEXt, none - 0: zTXt, deflate - 1: iTXt, none - 2: iTXt, deflate */ - png_charp key; /* keyword, 1-79 character description of "text" */ - png_charp text; /* comment, may be an empty string (ie "") - or a NULL pointer */ - png_size_t text_length; /* length of the text string */ -#ifdef PNG_iTXt_SUPPORTED - png_size_t itxt_length; /* length of the itxt string */ - png_charp lang; /* language code, 0-79 characters - or a NULL pointer */ - png_charp lang_key; /* keyword translated UTF-8 string, 0 or more - chars or a NULL pointer */ -#endif -} png_text; -typedef png_text FAR * png_textp; -typedef png_text FAR * FAR * png_textpp; -#endif - -/* Supported compression types for text in PNG files (tEXt, and zTXt). - * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ -#define PNG_TEXT_COMPRESSION_NONE_WR -3 -#define PNG_TEXT_COMPRESSION_zTXt_WR -2 -#define PNG_TEXT_COMPRESSION_NONE -1 -#define PNG_TEXT_COMPRESSION_zTXt 0 -#define PNG_ITXT_COMPRESSION_NONE 1 -#define PNG_ITXT_COMPRESSION_zTXt 2 -#define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ - -/* png_time is a way to hold the time in an machine independent way. - * Two conversions are provided, both from time_t and struct tm. There - * is no portable way to convert to either of these structures, as far - * as I know. If you know of a portable way, send it to me. As a side - * note - PNG has always been Year 2000 compliant! - */ -typedef struct png_time_struct -{ - png_uint_16 year; /* full year, as in, 1995 */ - png_byte month; /* month of year, 1 - 12 */ - png_byte day; /* day of month, 1 - 31 */ - png_byte hour; /* hour of day, 0 - 23 */ - png_byte minute; /* minute of hour, 0 - 59 */ - png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ -} png_time; -typedef png_time FAR * png_timep; -typedef png_time FAR * FAR * png_timepp; - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) -/* png_unknown_chunk is a structure to hold queued chunks for which there is - * no specific support. The idea is that we can use this to queue - * up private chunks for output even though the library doesn't actually - * know about their semantics. - */ -typedef struct png_unknown_chunk_t -{ - png_byte name[5]; - png_byte *data; - png_size_t size; - - /* libpng-using applications should NOT directly modify this byte. */ - png_byte location; /* mode of operation at read time */ -} -png_unknown_chunk; -typedef png_unknown_chunk FAR * png_unknown_chunkp; -typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; -#endif - -/* png_info is a structure that holds the information in a PNG file so - * that the application can find out the characteristics of the image. - * If you are reading the file, this structure will tell you what is - * in the PNG file. If you are writing the file, fill in the information - * you want to put into the PNG file, then call png_write_info(). - * The names chosen should be very close to the PNG specification, so - * consult that document for information about the meaning of each field. - * - * With libpng < 0.95, it was only possible to directly set and read the - * the values in the png_info_struct, which meant that the contents and - * order of the values had to remain fixed. With libpng 0.95 and later, - * however, there are now functions that abstract the contents of - * png_info_struct from the application, so this makes it easier to use - * libpng with dynamic libraries, and even makes it possible to use - * libraries that don't have all of the libpng ancillary chunk-handing - * functionality. - * - * In any case, the order of the parameters in png_info_struct should NOT - * be changed for as long as possible to keep compatibility with applications - * that use the old direct-access method with png_info_struct. - * - * The following members may have allocated storage attached that should be - * cleaned up before the structure is discarded: palette, trans, text, - * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile, - * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these - * are automatically freed when the info structure is deallocated, if they were - * allocated internally by libpng. This behavior can be changed by means - * of the png_data_freer() function. - * - * More allocation details: all the chunk-reading functions that - * change these members go through the corresponding png_set_* - * functions. A function to clear these members is available: see - * png_free_data(). The png_set_* functions do not depend on being - * able to point info structure members to any of the storage they are - * passed (they make their own copies), EXCEPT that the png_set_text - * functions use the same storage passed to them in the text_ptr or - * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns - * functions do not make their own copies. - */ -typedef struct png_info_struct -{ - /* the following are necessary for every PNG file */ - png_uint_32 width; /* width of image in pixels (from IHDR) */ - png_uint_32 height; /* height of image in pixels (from IHDR) */ - png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */ - png_uint_32 rowbytes; /* bytes needed to hold an untransformed row */ - png_colorp palette; /* array of color values (valid & PNG_INFO_PLTE) */ - png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */ - png_uint_16 num_trans; /* number of transparent palette color (tRNS) */ - png_byte bit_depth; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */ - png_byte color_type; /* see PNG_COLOR_TYPE_ below (from IHDR) */ - /* The following three should have been named *_method not *_type */ - png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */ - png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */ - png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ - - /* The following is informational only on read, and not used on writes. */ - png_byte channels; /* number of data channels per pixel (1, 2, 3, 4)*/ - png_byte pixel_depth; /* number of bits per pixel */ - png_byte spare_byte; /* to align the data, and for future use */ - png_byte signature[8]; /* magic bytes read by libpng from start of file */ - - /* The rest of the data is optional. If you are reading, check the - * valid field to see if the information in these are valid. If you - * are writing, set the valid field to those chunks you want written, - * and initialize the appropriate fields below. - */ - -#if defined(PNG_gAMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED) - /* The gAMA chunk describes the gamma characteristics of the system - * on which the image was created, normally in the range [1.0, 2.5]. - * Data is valid if (valid & PNG_INFO_gAMA) is non-zero. - */ - float gamma; /* gamma value of image, if (valid & PNG_INFO_gAMA) */ -#endif - -#if defined(PNG_sRGB_SUPPORTED) - /* GR-P, 0.96a */ - /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */ - png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */ -#endif - -#if defined(PNG_TEXT_SUPPORTED) - /* The tEXt, and zTXt chunks contain human-readable textual data in - * uncompressed, compressed, and optionally compressed forms, respectively. - * The data in "text" is an array of pointers to uncompressed, - * null-terminated C strings. Each chunk has a keyword that describes the - * textual data contained in that chunk. Keywords are not required to be - * unique, and the text string may be empty. Any number of text chunks may - * be in an image. - */ - int num_text; /* number of comments read/to write */ - int max_text; /* current size of text array */ - png_textp text; /* array of comments read/to write */ -#endif /* PNG_TEXT_SUPPORTED */ - -#if defined(PNG_tIME_SUPPORTED) - /* The tIME chunk holds the last time the displayed image data was - * modified. See the png_time struct for the contents of this struct. - */ - png_time mod_time; -#endif - -#if defined(PNG_sBIT_SUPPORTED) - /* The sBIT chunk specifies the number of significant high-order bits - * in the pixel data. Values are in the range [1, bit_depth], and are - * only specified for the channels in the pixel data. The contents of - * the low-order bits is not specified. Data is valid if - * (valid & PNG_INFO_sBIT) is non-zero. - */ - png_color_8 sig_bit; /* significant bits in color channels */ -#endif - -#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \ -defined(PNG_READ_BACKGROUND_SUPPORTED) - /* The tRNS chunk supplies transparency data for paletted images and - * other image types that don't need a full alpha channel. There are - * "num_trans" transparency values for a paletted image, stored in the - * same order as the palette colors, starting from index 0. Values - * for the data are in the range [0, 255], ranging from fully transparent - * to fully opaque, respectively. For non-paletted images, there is a - * single color specified that should be treated as fully transparent. - * Data is valid if (valid & PNG_INFO_tRNS) is non-zero. - */ - png_bytep trans; /* transparent values for paletted image */ - png_color_16 trans_values; /* transparent color for non-palette image */ -#endif - -#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - /* The bKGD chunk gives the suggested image background color if the - * display program does not have its own background color and the image - * is needs to composited onto a background before display. The colors - * in "background" are normally in the same color space/depth as the - * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero. - */ - png_color_16 background; -#endif - -#if defined(PNG_oFFs_SUPPORTED) - /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards - * and downwards from the top-left corner of the display, page, or other - * application-specific co-ordinate space. See the PNG_OFFSET_ defines - * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero. - */ - png_int_32 x_offset; /* x offset on page */ - png_int_32 y_offset; /* y offset on page */ - png_byte offset_unit_type; /* offset units type */ -#endif - -#if defined(PNG_pHYs_SUPPORTED) - /* The pHYs chunk gives the physical pixel density of the image for - * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_ - * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero. - */ - png_uint_32 x_pixels_per_unit; /* horizontal pixel density */ - png_uint_32 y_pixels_per_unit; /* vertical pixel density */ - png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */ -#endif - -#if defined(PNG_hIST_SUPPORTED) - /* The hIST chunk contains the relative frequency or importance of the - * various palette entries, so that a viewer can intelligently select a - * reduced-color palette, if required. Data is an array of "num_palette" - * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST) - * is non-zero. - */ - png_uint_16p hist; -#endif - -#ifdef PNG_cHRM_SUPPORTED - /* The cHRM chunk describes the CIE color characteristics of the monitor - * on which the PNG was created. This data allows the viewer to do gamut - * mapping of the input image to ensure that the viewer sees the same - * colors in the image as the creator. Values are in the range - * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero. - */ -#ifdef PNG_FLOATING_POINT_SUPPORTED - float x_white; - float y_white; - float x_red; - float y_red; - float x_green; - float y_green; - float x_blue; - float y_blue; -#endif -#endif - -#if defined(PNG_pCAL_SUPPORTED) - /* The pCAL chunk describes a transformation between the stored pixel - * values and original physical data values used to create the image. - * The integer range [0, 2^bit_depth - 1] maps to the floating-point - * range given by [pcal_X0, pcal_X1], and are further transformed by a - * (possibly non-linear) transformation function given by "pcal_type" - * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_ - * defines below, and the PNG-Group's PNG extensions document for a - * complete description of the transformations and how they should be - * implemented, and for a description of the ASCII parameter strings. - * Data values are valid if (valid & PNG_INFO_pCAL) non-zero. - */ - png_charp pcal_purpose; /* pCAL chunk description string */ - png_int_32 pcal_X0; /* minimum value */ - png_int_32 pcal_X1; /* maximum value */ - png_charp pcal_units; /* Latin-1 string giving physical units */ - png_charpp pcal_params; /* ASCII strings containing parameter values */ - png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */ - png_byte pcal_nparams; /* number of parameters given in pcal_params */ -#endif - -#ifdef PNG_FREE_ME_SUPPORTED - png_uint_32 free_me; /* flags items libpng is responsible for freeing */ -#endif - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) - /* storage for unknown chunks that the library doesn't recognize. */ - png_unknown_chunkp unknown_chunks; - png_size_t unknown_chunks_num; -#endif - -#if defined(PNG_iCCP_SUPPORTED) - /* iCCP chunk data. */ - png_charp iccp_name; /* profile name */ - png_charp iccp_profile; /* International Color Consortium profile data */ - /* Note to maintainer: should be png_bytep */ - png_uint_32 iccp_proflen; /* ICC profile data length */ - png_byte iccp_compression; /* Always zero */ -#endif - -#if defined(PNG_sPLT_SUPPORTED) - /* data on sPLT chunks (there may be more than one). */ - png_sPLT_tp splt_palettes; - png_uint_32 splt_palettes_num; -#endif - -#if defined(PNG_sCAL_SUPPORTED) - /* The sCAL chunk describes the actual physical dimensions of the - * subject matter of the graphic. The chunk contains a unit specification - * a byte value, and two ASCII strings representing floating-point - * values. The values are width and height corresponsing to one pixel - * in the image. This external representation is converted to double - * here. Data values are valid if (valid & PNG_INFO_sCAL) is non-zero. - */ - png_byte scal_unit; /* unit of physical scale */ -#ifdef PNG_FLOATING_POINT_SUPPORTED - double scal_pixel_width; /* width of one pixel */ - double scal_pixel_height; /* height of one pixel */ -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_charp scal_s_width; /* string containing height */ - png_charp scal_s_height; /* string containing width */ -#endif -#endif - -#if defined(PNG_INFO_IMAGE_SUPPORTED) - /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS) non-zero */ - /* Data valid if (valid & PNG_INFO_IDAT) non-zero */ - png_bytepp row_pointers; /* the image bits */ -#endif - -#if defined(PNG_FIXED_POINT_SUPPORTED) && defined(PNG_gAMA_SUPPORTED) - png_fixed_point int_gamma; /* gamma of image, if (valid & PNG_INFO_gAMA) */ -#endif - -#if defined(PNG_cHRM_SUPPORTED) && defined(PNG_FIXED_POINT_SUPPORTED) - png_fixed_point int_x_white; - png_fixed_point int_y_white; - png_fixed_point int_x_red; - png_fixed_point int_y_red; - png_fixed_point int_x_green; - png_fixed_point int_y_green; - png_fixed_point int_x_blue; - png_fixed_point int_y_blue; -#endif - -} png_info; - -typedef png_info FAR * png_infop; -typedef png_info FAR * FAR * png_infopp; - -/* Maximum positive integer used in PNG is (2^31)-1 */ -#define PNG_MAX_UINT ((png_uint_32)0x7fffffffL) - -/* These describe the color_type field in png_info. */ -/* color type masks */ -#define PNG_COLOR_MASK_PALETTE 1 -#define PNG_COLOR_MASK_COLOR 2 -#define PNG_COLOR_MASK_ALPHA 4 - -/* color types. Note that not all combinations are legal */ -#define PNG_COLOR_TYPE_GRAY 0 -#define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) -#define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) -#define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) -#define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) -/* aliases */ -#define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA -#define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA - -/* This is for compression type. PNG 1.0-1.2 only define the single type. */ -#define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ -#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE - -/* This is for filter type. PNG 1.0-1.2 only define the single type. */ -#define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ -#define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ -#define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE - -/* These are for the interlacing type. These values should NOT be changed. */ -#define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ -#define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ -#define PNG_INTERLACE_LAST 2 /* Not a valid value */ - -/* These are for the oFFs chunk. These values should NOT be changed. */ -#define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ -#define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ -#define PNG_OFFSET_LAST 2 /* Not a valid value */ - -/* These are for the pCAL chunk. These values should NOT be changed. */ -#define PNG_EQUATION_LINEAR 0 /* Linear transformation */ -#define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ -#define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ -#define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ -#define PNG_EQUATION_LAST 4 /* Not a valid value */ - -/* These are for the sCAL chunk. These values should NOT be changed. */ -#define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ -#define PNG_SCALE_METER 1 /* meters per pixel */ -#define PNG_SCALE_RADIAN 2 /* radians per pixel */ -#define PNG_SCALE_LAST 3 /* Not a valid value */ - -/* These are for the pHYs chunk. These values should NOT be changed. */ -#define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ -#define PNG_RESOLUTION_METER 1 /* pixels/meter */ -#define PNG_RESOLUTION_LAST 2 /* Not a valid value */ - -/* These are for the sRGB chunk. These values should NOT be changed. */ -#define PNG_sRGB_INTENT_PERCEPTUAL 0 -#define PNG_sRGB_INTENT_RELATIVE 1 -#define PNG_sRGB_INTENT_SATURATION 2 -#define PNG_sRGB_INTENT_ABSOLUTE 3 -#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ - -/* This is for text chunks */ -#define PNG_KEYWORD_MAX_LENGTH 79 - -/* Maximum number of entries in PLTE/sPLT/tRNS arrays */ -#define PNG_MAX_PALETTE_LENGTH 256 - -/* These determine if an ancillary chunk's data has been successfully read - * from the PNG header, or if the application has filled in the corresponding - * data in the info_struct to be written into the output file. The values - * of the PNG_INFO_ defines should NOT be changed. - */ -#define PNG_INFO_gAMA 0x0001 -#define PNG_INFO_sBIT 0x0002 -#define PNG_INFO_cHRM 0x0004 -#define PNG_INFO_PLTE 0x0008 -#define PNG_INFO_tRNS 0x0010 -#define PNG_INFO_bKGD 0x0020 -#define PNG_INFO_hIST 0x0040 -#define PNG_INFO_pHYs 0x0080 -#define PNG_INFO_oFFs 0x0100 -#define PNG_INFO_tIME 0x0200 -#define PNG_INFO_pCAL 0x0400 -#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ -#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ -#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ -#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ -#define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ - -/* This is used for the transformation routines, as some of them - * change these values for the row. It also should enable using - * the routines for other purposes. - */ -typedef struct png_row_info_struct -{ - png_uint_32 width; /* width of row */ - png_uint_32 rowbytes; /* number of bytes in row */ - png_byte color_type; /* color type of row */ - png_byte bit_depth; /* bit depth of row */ - png_byte channels; /* number of channels (1, 2, 3, or 4) */ - png_byte pixel_depth; /* bits per pixel (depth * channels) */ -} png_row_info; - -typedef png_row_info FAR * png_row_infop; -typedef png_row_info FAR * FAR * png_row_infopp; - -/* These are the function types for the I/O functions and for the functions - * that allow the user to override the default I/O functions with his or her - * own. The png_error_ptr type should match that of user-supplied warning - * and error functions, while the png_rw_ptr type should match that of the - * user read/write data functions. - */ -typedef struct png_struct_def png_struct; -typedef png_struct FAR * png_structp; - -typedef void (PNGAPI *png_error_ptr) PNGARG((png_structp, png_const_charp)); -typedef void (PNGAPI *png_rw_ptr) PNGARG((png_structp, png_bytep, png_size_t)); -typedef void (PNGAPI *png_flush_ptr) PNGARG((png_structp)); -typedef void (PNGAPI *png_read_status_ptr) PNGARG((png_structp, png_uint_32, - int)); -typedef void (PNGAPI *png_write_status_ptr) PNGARG((png_structp, png_uint_32, - int)); - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -typedef void (PNGAPI *png_progressive_info_ptr) PNGARG((png_structp, png_infop)); -typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop)); -typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep, - png_uint_32, int)); -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_LEGACY_SUPPORTED) -typedef void (PNGAPI *png_user_transform_ptr) PNGARG((png_structp, - png_row_infop, png_bytep)); -#endif - -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) -typedef int (PNGAPI *png_user_chunk_ptr) PNGARG((png_structp, png_unknown_chunkp)); -#endif -#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) -typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp)); -#endif - -/* Transform masks for the high-level interface */ -#define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ -#define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ -#define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ -#define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ -#define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ -#define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ -#define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ -#define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ -#define PNG_TRANSFORM_BGR 0x0080 /* read and write */ -#define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ -#define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ -#define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ -#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* WRITE only */ - -/* Flags for MNG supported features */ -#define PNG_FLAG_MNG_EMPTY_PLTE 0x01 -#define PNG_FLAG_MNG_FILTER_64 0x04 -#define PNG_ALL_MNG_FEATURES 0x05 - -typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_size_t)); -typedef void (*png_free_ptr) PNGARG((png_structp, png_voidp)); - -/* The structure that holds the information to read and write PNG files. - * The only people who need to care about what is inside of this are the - * people who will be modifying the library for their own special needs. - * It should NOT be accessed directly by an application, except to store - * the jmp_buf. - */ - -struct png_struct_def -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf jmpbuf; /* used in png_error */ -#endif - png_error_ptr error_fn; /* function for printing errors and aborting */ - png_error_ptr warning_fn; /* function for printing warnings */ - png_voidp error_ptr; /* user supplied struct for error functions */ - png_rw_ptr write_data_fn; /* function for writing output data */ - png_rw_ptr read_data_fn; /* function for reading input data */ - png_voidp io_ptr; /* ptr to application struct for I/O functions*/ - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - png_user_transform_ptr read_user_transform_fn; /* user read transform */ -#endif - -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) - png_user_transform_ptr write_user_transform_fn; /* user write transform */ -#endif - -/* These were added in libpng-1.0.2 */ -#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) - png_voidp user_transform_ptr; /* user supplied struct for user transform */ - png_byte user_transform_depth; /* bit depth of user transformed pixels */ - png_byte user_transform_channels; /* channels in user transformed pixels */ -#endif -#endif - - png_uint_32 mode; /* tells us where we are in the PNG file */ - png_uint_32 flags; /* flags indicating various things to libpng */ - png_uint_32 transformations; /* which transformations to perform */ - - z_stream zstream; /* pointer to decompression structure (below) */ - png_bytep zbuf; /* buffer for zlib */ - png_size_t zbuf_size; /* size of zbuf */ - int zlib_level; /* holds zlib compression level */ - int zlib_method; /* holds zlib compression method */ - int zlib_window_bits; /* holds zlib compression window bits */ - int zlib_mem_level; /* holds zlib compression memory level */ - int zlib_strategy; /* holds zlib compression strategy */ - - png_uint_32 width; /* width of image in pixels */ - png_uint_32 height; /* height of image in pixels */ - png_uint_32 num_rows; /* number of rows in current pass */ - png_uint_32 usr_width; /* width of row at start of write */ - png_uint_32 rowbytes; /* size of row in bytes */ - png_uint_32 irowbytes; /* size of current interlaced row in bytes */ - png_uint_32 iwidth; /* width of current interlaced row in pixels */ - png_uint_32 row_number; /* current row in interlace pass */ - png_bytep prev_row; /* buffer to save previous (unfiltered) row */ - png_bytep row_buf; /* buffer to save current (unfiltered) row */ - png_bytep sub_row; /* buffer to save "sub" row when filtering */ - png_bytep up_row; /* buffer to save "up" row when filtering */ - png_bytep avg_row; /* buffer to save "avg" row when filtering */ - png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */ - png_row_info row_info; /* used for transformation routines */ - - png_uint_32 idat_size; /* current IDAT size for read */ - png_uint_32 crc; /* current chunk CRC value */ - png_colorp palette; /* palette from the input file */ - png_uint_16 num_palette; /* number of color entries in palette */ - png_uint_16 num_trans; /* number of transparency values */ - png_byte chunk_name[5]; /* null-terminated name of current chunk */ - png_byte compression; /* file compression type (always 0) */ - png_byte filter; /* file filter type (always 0) */ - png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ - png_byte pass; /* current interlace pass (0 - 6) */ - png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */ - png_byte color_type; /* color type of file */ - png_byte bit_depth; /* bit depth of file */ - png_byte usr_bit_depth; /* bit depth of users row */ - png_byte pixel_depth; /* number of bits per pixel */ - png_byte channels; /* number of channels in file */ - png_byte usr_channels; /* channels at start of write */ - png_byte sig_bytes; /* magic bytes read/written from start of file */ - -#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) -#ifdef PNG_LEGACY_SUPPORTED - png_byte filler; /* filler byte for pixel expansion */ -#else - png_uint_16 filler; /* filler bytes for pixel expansion */ -#endif -#endif - -#if defined(PNG_READ_bKGD_SUPPORTED) - png_byte background_gamma_type; -# ifdef PNG_FLOATING_POINT_SUPPORTED - float background_gamma; -# endif - png_color_16 background; /* background color in screen gamma space */ -# if defined(PNG_READ_GAMMA_SUPPORTED) - png_color_16 background_1; /* background normalized to gamma 1.0 */ -# endif /* PNG_READ_GAMMA && PNG_READ_bKGD_SUPPORTED */ -#endif /* PNG_READ_bKGD_SUPPORTED */ - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) - png_flush_ptr output_flush_fn;/* Function for flushing output */ - png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */ - png_uint_32 flush_rows; /* number of rows written since last flush */ -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - int gamma_shift; /* number of "insignificant" bits 16-bit gamma */ -#ifdef PNG_FLOATING_POINT_SUPPORTED - float gamma; /* file gamma value */ - float screen_gamma; /* screen gamma value (display_exponent) */ -#endif -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_bytep gamma_table; /* gamma table for 8-bit depth files */ - png_bytep gamma_from_1; /* converts from 1.0 to screen */ - png_bytep gamma_to_1; /* converts from file to 1.0 */ - png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */ - png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */ - png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */ -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_sBIT_SUPPORTED) - png_color_8 sig_bit; /* significant bits in each available channel */ -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) - png_color_8 shift; /* shift for significant bit tranformation */ -#endif - -#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \ - || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_bytep trans; /* transparency values for paletted files */ - png_color_16 trans_values; /* transparency values for non-paletted files */ -#endif - - png_read_status_ptr read_row_fn; /* called after each row is decoded */ - png_write_status_ptr write_row_fn; /* called after each row is encoded */ -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED - png_progressive_info_ptr info_fn; /* called after header data fully read */ - png_progressive_row_ptr row_fn; /* called after each prog. row is decoded */ - png_progressive_end_ptr end_fn; /* called after image is complete */ - png_bytep save_buffer_ptr; /* current location in save_buffer */ - png_bytep save_buffer; /* buffer for previously read data */ - png_bytep current_buffer_ptr; /* current location in current_buffer */ - png_bytep current_buffer; /* buffer for recently used data */ - png_uint_32 push_length; /* size of current input chunk */ - png_uint_32 skip_length; /* bytes to skip in input data */ - png_size_t save_buffer_size; /* amount of data now in save_buffer */ - png_size_t save_buffer_max; /* total size of save_buffer */ - png_size_t buffer_size; /* total amount of available input data */ - png_size_t current_buffer_size; /* amount of data now in current_buffer */ - int process_mode; /* what push library is currently doing */ - int cur_palette; /* current push library palette index */ - -# if defined(PNG_READ_TEXT_SUPPORTED) - png_size_t current_text_size; /* current size of text input data */ - png_size_t current_text_left; /* how much text left to read in input */ - png_charp current_text; /* current text chunk buffer */ - png_charp current_text_ptr; /* current location in current_text */ -# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_READ_TEXT_SUPPORTED */ - -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* for the Borland special 64K segment handler */ - png_bytepp offset_table_ptr; - png_bytep offset_table; - png_uint_16 offset_table_number; - png_uint_16 offset_table_count; - png_uint_16 offset_table_count_free; -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) - png_bytep palette_lookup; /* lookup table for dithering */ - png_bytep dither_index; /* index translation for palette files */ -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) || defined(PNG_READ_hIST_SUPPORTED) - png_uint_16p hist; /* histogram */ -#endif - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - png_byte heuristic_method; /* heuristic for row filter selection */ - png_byte num_prev_filters; /* number of weights for previous rows */ - png_bytep prev_filters; /* filter type(s) of previous row(s) */ - png_uint_16p filter_weights; /* weight(s) for previous line(s) */ - png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */ - png_uint_16p filter_costs; /* relative filter calculation cost */ - png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */ -#endif - -#if defined(PNG_TIME_RFC1123_SUPPORTED) - png_charp time_buffer; /* String to hold RFC 1123 time text */ -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_voidp mem_ptr; /* user supplied struct for mem functions */ - png_malloc_ptr malloc_fn; /* function for allocating memory */ - png_free_ptr free_fn; /* function for freeing memory */ -#endif - -/* New members added in libpng-1.0.6 */ - -#ifdef PNG_FREE_ME_SUPPORTED - png_uint_32 free_me; /* flags items libpng is responsible for freeing */ -#endif - -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) - png_voidp user_chunk_ptr; - png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */ -#endif - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) - int num_chunk_list; - png_bytep chunk_list; -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - png_byte rgb_to_gray_status; - png_uint_16 rgb_to_gray_red_coeff; - png_uint_16 rgb_to_gray_green_coeff; - png_uint_16 rgb_to_gray_blue_coeff; -#endif - -#if defined(PNG_MNG_FEATURES_SUPPORTED) || \ - defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ - defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) -/* Note to maintainer: change this to png_uint_32 at next opportunity */ - png_byte mng_features_permitted; -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_fixed_point int_gamma; -#endif - - png_byte filter_type; - -}; - - -/* This prevents a compiler error in png_get_copyright() in png.c if png.c -and png.h are both at * version 1.0.9 - */ -typedef png_structp version_1_0_9; - -typedef png_struct FAR * FAR * png_structpp; - -/* Here are the function definitions most commonly used. This is not - * the place to find out how to use libpng. See libpng.txt for the - * full explanation, see example.c for the summary. This just provides - * a simple one line description of the use of each function. - */ - -/* Returns the version number of the library */ -extern PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void)); - -/* Tell lib we have already handled the first magic bytes. - * Handling more than 8 bytes from the beginning of the file is an error. - */ -extern PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr, - int num_bytes)); - -/* Check sig[start] through sig[start + num_to_check - 1] to see if it's a - * PNG file. Returns zero if the supplied bytes match the 8-byte PNG - * signature, and non-zero otherwise. Having num_to_check == 0 or - * start > 7 will always fail (ie return non-zero). - */ -extern PNG_EXPORT(int,png_sig_cmp) PNGARG((png_bytep sig, png_size_t start, - png_size_t num_to_check)); - -/* Simple signature checking function. This is the same as calling - * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). - */ -extern PNG_EXPORT(int,png_check_sig) PNGARG((png_bytep sig, int num)); - -/* Allocate and initialize png_ptr struct for reading, and any other memory. */ -extern PNG_EXPORT(png_structp,png_create_read_struct) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn)); - -/* Allocate and initialize png_ptr struct for writing, and any other memory */ -extern PNG_EXPORT(png_structp,png_create_write_struct) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn)); - -extern PNG_EXPORT(png_uint_32,png_get_compression_buffer_size) - PNGARG((png_structp png_ptr)); - -extern PNG_EXPORT(void,png_set_compression_buffer_size) - PNGARG((png_structp png_ptr, png_uint_32 size)); - -/* Reset the compression stream */ -extern PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr)); - -#ifdef PNG_USER_MEM_SUPPORTED -extern PNG_EXPORT(png_structp,png_create_read_struct_2) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn)); -extern PNG_EXPORT(png_structp,png_create_write_struct_2) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn)); -#endif - -/* Write a PNG chunk - size, type, (optional) data, CRC. */ -extern PNG_EXPORT(void,png_write_chunk) PNGARG((png_structp png_ptr, - png_bytep chunk_name, png_bytep data, png_size_t length)); - -/* Write the start of a PNG chunk - length and chunk name. */ -extern PNG_EXPORT(void,png_write_chunk_start) PNGARG((png_structp png_ptr, - png_bytep chunk_name, png_uint_32 length)); - -/* Write the data of a PNG chunk started with png_write_chunk_start(). */ -extern PNG_EXPORT(void,png_write_chunk_data) PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); - -/* Finish a chunk started with png_write_chunk_start() (includes CRC). */ -extern PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr)); - -/* Allocate and initialize the info structure */ -extern PNG_EXPORT(png_infop,png_create_info_struct) - PNGARG((png_structp png_ptr)); - -/* Initialize the info structure (old interface - NOT DLL EXPORTED) */ -extern void png_info_init PNGARG((png_infop info_ptr)); - -/* Writes all the PNG information before the image. */ -extern PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr, - png_infop info_ptr)); -extern PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* read the information before the actual image data. */ -extern PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -#if defined(PNG_TIME_RFC1123_SUPPORTED) -extern PNG_EXPORT(png_charp,png_convert_to_rfc1123) - PNGARG((png_structp png_ptr, png_timep ptime)); -#endif - -#if !defined(_WIN32_WCE) -/* "time.h" functions are not supported on WindowsCE */ -#if defined(PNG_WRITE_tIME_SUPPORTED) -/* convert from a struct tm to png_time */ -extern PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime, - struct tm FAR * ttime)); - -/* convert from time_t to png_time. Uses gmtime() */ -extern PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime, - time_t ttime)); -#endif /* PNG_WRITE_tIME_SUPPORTED */ -#endif /* _WIN32_WCE */ - -#if defined(PNG_READ_EXPAND_SUPPORTED) -/* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ -extern PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(void,png_set_gray_1_2_4_to_8) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -/* Use blue, green, red order for pixels. */ -extern PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) -/* Expand the grayscale to 24-bit RGB if necessary. */ -extern PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) -/* Reduce RGB to grayscale. */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr, - int error_action, double red, double green )); -#endif -extern PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr, - int error_action, png_fixed_point red, png_fixed_point green )); -extern PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp - png_ptr)); -#endif - -extern PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth, - png_colorp palette)); - -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -extern PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -extern PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -extern PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) -/* Add a filler byte to 24-bit RGB images. */ -extern PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr, - png_uint_32 filler, int flags)); -/* The values of the PNG_FILLER_ defines should NOT be changed */ -#define PNG_FILLER_BEFORE 0 -#define PNG_FILLER_AFTER 1 -#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ - -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -/* Swap bytes in 16-bit depth files. */ -extern PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) -/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ -extern PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) -/* Swap packing order of pixels in bytes. */ -extern PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) -/* Converts files to legal bit depths. */ -extern PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr, - png_color_8p true_bits)); -#endif - -#if defined(PNG_READ_INTERLACING_SUPPORTED) || \ - defined(PNG_WRITE_INTERLACING_SUPPORTED) -/* Have the code handle the interlacing. Returns the number of passes. */ -extern PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -/* Invert monochrome files */ -extern PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) -/* Handle alpha and tRNS by replacing with a background color. */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr, - png_color_16p background_color, int background_gamma_code, - int need_expand, double background_gamma)); -#endif -#define PNG_BACKGROUND_GAMMA_UNKNOWN 0 -#define PNG_BACKGROUND_GAMMA_SCREEN 1 -#define PNG_BACKGROUND_GAMMA_FILE 2 -#define PNG_BACKGROUND_GAMMA_UNIQUE 3 -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) -/* strip the second byte of information from a 16-bit depth file. */ -extern PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) -/* Turn on dithering, and reduce the palette to the number of colors available. */ -extern PNG_EXPORT(void,png_set_dither) PNGARG((png_structp png_ptr, - png_colorp palette, int num_palette, int maximum_colors, - png_uint_16p histogram, int full_dither)); -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) -/* Handle gamma correction. Screen_gamma=(display_exponent) */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr, - double screen_gamma, double default_file_gamma)); -#endif -#endif - -#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ - defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) -/* Permit or disallow empty PLTE (0: not permitted, 1: permitted) */ -/* Deprecated and will be removed. Use png_permit_mng_features() instead. */ -extern PNG_EXPORT(void,png_permit_empty_plte) PNGARG((png_structp png_ptr, - int empty_plte_permitted)); -#endif - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -/* Set how many lines between output flushes - 0 for no flushing */ -extern PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows)); -/* Flush the current PNG output buffer */ -extern PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr)); -#endif - -/* optional update palette with requested transformations */ -extern PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr)); - -/* optional call to update the users info structure */ -extern PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* read a one or more rows of image data.*/ -extern PNG_EXPORT(void,png_read_rows) PNGARG((png_structp png_ptr, - png_bytepp row, png_bytepp display_row, png_uint_32 num_rows)); - -/* read a row of data.*/ -extern PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr, - png_bytep row, - png_bytep display_row)); - -/* read the whole image into memory at once. */ -extern PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr, - png_bytepp image)); - -/* write a row of image data */ -extern PNG_EXPORT(void,png_write_row) PNGARG((png_structp png_ptr, - png_bytep row)); - -/* write a few rows of image data */ -extern PNG_EXPORT(void,png_write_rows) PNGARG((png_structp png_ptr, - png_bytepp row, png_uint_32 num_rows)); - -/* write the image data */ -extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, - png_bytepp image)); - -/* writes the end of the PNG file. */ -extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* read the end of the PNG file. */ -extern PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* free any memory associated with the png_info_struct */ -extern PNG_EXPORT(void,png_destroy_info_struct) PNGARG((png_structp png_ptr, - png_infopp info_ptr_ptr)); - -/* free any memory associated with the png_struct and the png_info_structs */ -extern PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp - png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); - -/* free all memory used by the read (old method - NOT DLL EXPORTED) */ -extern void png_read_destroy PNGARG((png_structp png_ptr, png_infop info_ptr, - png_infop end_info_ptr)); - -/* free any memory associated with the png_struct and the png_info_structs */ -extern PNG_EXPORT(void,png_destroy_write_struct) - PNGARG((png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)); - -/* free any memory used in info_ptr struct (old method - NOT DLL EXPORTED) */ -extern void png_write_destroy_info PNGARG((png_infop info_ptr)); - -/* free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ -extern void png_write_destroy PNGARG((png_structp png_ptr)); - -/* set the libpng method of handling chunk CRC errors */ -extern PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr, - int crit_action, int ancil_action)); - -/* Values for png_set_crc_action() to say how to handle CRC errors in - * ancillary and critical chunks, and whether to use the data contained - * therein. Note that it is impossible to "discard" data in a critical - * chunk. For versions prior to 0.90, the action was always error/quit, - * whereas in version 0.90 and later, the action for CRC errors in ancillary - * chunks is warn/discard. These values should NOT be changed. - * - * value action:critical action:ancillary - */ -#define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ -#define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ -#define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ -#define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ -#define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ -#define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ - -/* These functions give the user control over the scan-line filtering in - * libpng and the compression methods used by zlib. These functions are - * mainly useful for testing, as the defaults should work with most users. - * Those users who are tight on memory or want faster performance at the - * expense of compression can modify them. See the compression library - * header file (zlib.h) for an explination of the compression functions. - */ - -/* set the filtering method(s) used by libpng. Currently, the only valid - * value for "method" is 0. - */ -extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, - int filters)); - -/* Flags for png_set_filter() to say which filters to use. The flags - * are chosen so that they don't conflict with real filter types - * below, in case they are supplied instead of the #defined constants. - * These values should NOT be changed. - */ -#define PNG_NO_FILTERS 0x00 -#define PNG_FILTER_NONE 0x08 -#define PNG_FILTER_SUB 0x10 -#define PNG_FILTER_UP 0x20 -#define PNG_FILTER_AVG 0x40 -#define PNG_FILTER_PAETH 0x80 -#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ - PNG_FILTER_AVG | PNG_FILTER_PAETH) - -/* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. - * These defines should NOT be changed. - */ -#define PNG_FILTER_VALUE_NONE 0 -#define PNG_FILTER_VALUE_SUB 1 -#define PNG_FILTER_VALUE_UP 2 -#define PNG_FILTER_VALUE_AVG 3 -#define PNG_FILTER_VALUE_PAETH 4 -#define PNG_FILTER_VALUE_LAST 5 - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* EXPERIMENTAL */ -/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ - * defines, either the default (minimum-sum-of-absolute-differences), or - * the experimental method (weighted-minimum-sum-of-absolute-differences). - * - * Weights are factors >= 1.0, indicating how important it is to keep the - * filter type consistent between rows. Larger numbers mean the current - * filter is that many times as likely to be the same as the "num_weights" - * previous filters. This is cumulative for each previous row with a weight. - * There needs to be "num_weights" values in "filter_weights", or it can be - * NULL if the weights aren't being specified. Weights have no influence on - * the selection of the first row filter. Well chosen weights can (in theory) - * improve the compression for a given image. - * - * Costs are factors >= 1.0 indicating the relative decoding costs of a - * filter type. Higher costs indicate more decoding expense, and are - * therefore less likely to be selected over a filter with lower computational - * costs. There needs to be a value in "filter_costs" for each valid filter - * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't - * setting the costs. Costs try to improve the speed of decompression without - * unduly increasing the compressed image size. - * - * A negative weight or cost indicates the default value is to be used, and - * values in the range [0.0, 1.0) indicate the value is to remain unchanged. - * The default values for both weights and costs are currently 1.0, but may - * change if good general weighting/cost heuristics can be found. If both - * the weights and costs are set to 1.0, this degenerates the WEIGHTED method - * to the UNWEIGHTED method, but with added encoding time/computation. - */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr, - int heuristic_method, int num_weights, png_doublep filter_weights, - png_doublep filter_costs)); -#endif -#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ - -/* Heuristic used for row filter selection. These defines should NOT be - * changed. - */ -#define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ -#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ -#define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ -#define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ - -/* Set the library compression level. Currently, valid values range from - * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 - * (0 - no compression, 9 - "maximal" compression). Note that tests have - * shown that zlib compression levels 3-6 usually perform as well as level 9 - * for PNG images, and do considerably fewer caclulations. In the future, - * these values may not correspond directly to the zlib compression levels. - */ -extern PNG_EXPORT(void,png_set_compression_level) PNGARG((png_structp png_ptr, - int level)); - -extern PNG_EXPORT(void,png_set_compression_mem_level) - PNGARG((png_structp png_ptr, int mem_level)); - -extern PNG_EXPORT(void,png_set_compression_strategy) - PNGARG((png_structp png_ptr, int strategy)); - -extern PNG_EXPORT(void,png_set_compression_window_bits) - PNGARG((png_structp png_ptr, int window_bits)); - -extern PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr, - int method)); - -/* These next functions are called for input/output, memory, and error - * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, - * and call standard C I/O routines such as fread(), fwrite(), and - * fprintf(). These functions can be made to use other I/O routines - * at run time for those applications that need to handle I/O in a - * different manner by calling png_set_???_fn(). See libpng.txt for - * more information. - */ - -#if !defined(PNG_NO_STDIO) -/* Initialize the input/output for the PNG file to the default functions. */ -extern PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, png_FILE_p fp)); -#endif - -/* Replace the (error and abort), and warning functions with user - * supplied functions. If no messages are to be printed you must still - * write and use replacement functions. The replacement error_fn should - * still do a longjmp to the last setjmp location if you are using this - * method of error handling. If error_fn or warning_fn is NULL, the - * default function will be used. - */ - -extern PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr, - png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)); - -/* Return the user pointer associated with the error functions */ -extern PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr)); - -/* Replace the default data output functions with a user supplied one(s). - * If buffered output is not used, then output_flush_fn can be set to NULL. - * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time - * output_flush_fn will be ignored (and thus can be NULL). - */ -extern PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr, - png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); - -/* Replace the default data input function with a user supplied one. */ -extern PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr, - png_voidp io_ptr, png_rw_ptr read_data_fn)); - -/* Return the user pointer associated with the I/O functions */ -extern PNG_EXPORT(png_voidp,png_get_io_ptr) PNGARG((png_structp png_ptr)); - -extern PNG_EXPORT(void,png_set_read_status_fn) PNGARG((png_structp png_ptr, - png_read_status_ptr read_row_fn)); - -extern PNG_EXPORT(void,png_set_write_status_fn) PNGARG((png_structp png_ptr, - png_write_status_ptr write_row_fn)); - -#ifdef PNG_USER_MEM_SUPPORTED -/* Replace the default memory allocation functions with user supplied one(s). */ -extern PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr, - png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn)); -/* Return the user pointer associated with the memory functions */ -extern PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr)); -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_LEGACY_SUPPORTED) -extern PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp - png_ptr, png_user_transform_ptr read_user_transform_fn)); -#endif - -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_LEGACY_SUPPORTED) -extern PNG_EXPORT(void,png_set_write_user_transform_fn) PNGARG((png_structp - png_ptr, png_user_transform_ptr write_user_transform_fn)); -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_LEGACY_SUPPORTED) -extern PNG_EXPORT(void,png_set_user_transform_info) PNGARG((png_structp - png_ptr, png_voidp user_transform_ptr, int user_transform_depth, - int user_transform_channels)); -/* Return the user pointer associated with the user transform functions */ -extern PNG_EXPORT(png_voidp,png_get_user_transform_ptr) - PNGARG((png_structp png_ptr)); -#endif - -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED -extern PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr, - png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); -extern PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp - png_ptr)); -#endif - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -/* Sets the function callbacks for the push reader, and a pointer to a - * user-defined structure available to the callback functions. - */ -extern PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr, - png_voidp progressive_ptr, - png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, - png_progressive_end_ptr end_fn)); - -/* returns the user pointer associated with the push read functions */ -extern PNG_EXPORT(png_voidp,png_get_progressive_ptr) - PNGARG((png_structp png_ptr)); - -/* function to be called when data becomes available */ -extern PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep buffer, png_size_t buffer_size)); - -/* function that combines rows. Not very much different than the - * png_combine_row() call. Is this even used????? - */ -extern PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr, - png_bytep old_row, png_bytep new_row)); -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - -extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr, - png_uint_32 size)); - -/* frees a pointer allocated by png_malloc() */ -extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr)); - -/* Free data that was allocated internally */ -extern PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 free_me, int num)); -#ifdef PNG_FREE_ME_SUPPORTED -/* Reassign responsibility for freeing existing data, whether allocated - * by libpng or by the application */ -extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr, - png_infop info_ptr, int freer, png_uint_32 mask)); -#endif -/* assignments for png_data_freer */ -#define PNG_DESTROY_WILL_FREE_DATA 1 -#define PNG_SET_WILL_FREE_DATA 1 -#define PNG_USER_WILL_FREE_DATA 2 -/* Flags for png_ptr->free_me and info_ptr->free_me */ -#define PNG_FREE_HIST 0x0008 -#define PNG_FREE_ICCP 0x0010 -#define PNG_FREE_SPLT 0x0020 -#define PNG_FREE_ROWS 0x0040 -#define PNG_FREE_PCAL 0x0080 -#define PNG_FREE_SCAL 0x0100 -#define PNG_FREE_UNKN 0x0200 -#define PNG_FREE_LIST 0x0400 -#define PNG_FREE_PLTE 0x1000 -#define PNG_FREE_TRNS 0x2000 -#define PNG_FREE_TEXT 0x4000 -#define PNG_FREE_ALL 0x7fff -#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ - -#ifdef PNG_USER_MEM_SUPPORTED -extern PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr, - png_uint_32 size)); -extern PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr, - png_voidp ptr)); -#endif - -extern PNG_EXPORT(png_voidp,png_memcpy_check) PNGARG((png_structp png_ptr, - png_voidp s1, png_voidp s2, png_uint_32 size)); - -extern PNG_EXPORT(png_voidp,png_memset_check) PNGARG((png_structp png_ptr, - png_voidp s1, int value, png_uint_32 size)); - -#if defined(USE_FAR_KEYWORD) /* memory model conversion function */ -extern void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr, - int check)); -#endif /* USE_FAR_KEYWORD */ - -/* Fatal error in PNG image of libpng - can't continue */ -extern PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr, - png_const_charp error)); - -/* The same, but the chunk name is prepended to the error string. */ -extern PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr, - png_const_charp error)); - -/* Non-fatal error in libpng. Can continue, but may have a problem. */ -extern PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr, - png_const_charp message)); - -/* Non-fatal error in libpng, chunk name is prepended to message. */ -extern PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr, - png_const_charp message)); - -/* The png_set_ functions are for storing values in the png_info_struct. - * Similarly, the png_get_ calls are used to read values from the - * png_info_struct, either storing the parameters in the passed variables, or - * setting pointers into the png_info_struct where the data is stored. The - * png_get_ functions return a non-zero value if the data was available - * in info_ptr, or return zero and do not change any of the parameters if the - * data was not available. - * - * These functions should be used instead of directly accessing png_info - * to avoid problems with future changes in the size and internal layout of - * png_info_struct. - */ -/* Returns "flag" if chunk data is valid in info_ptr. */ -extern PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((png_structp png_ptr, -png_infop info_ptr, png_uint_32 flag)); - -/* Returns number of bytes needed to hold a transformed row. */ -extern PNG_EXPORT(png_uint_32,png_get_rowbytes) PNGARG((png_structp png_ptr, -png_infop info_ptr)); - -#if defined(PNG_INFO_IMAGE_SUPPORTED) -/* Returns row_pointers, which is an array of pointers to scanlines that was -returned from png_read_png(). */ -extern PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr, -png_infop info_ptr)); -/* Set row_pointers, which is an array of pointers to scanlines for use -by png_write_png(). */ -extern PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytepp row_pointers)); -#endif - -/* Returns number of color channels in image. */ -extern PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr, -png_infop info_ptr)); - -#ifdef PNG_EASY_ACCESS_SUPPORTED -/* Returns image width in pixels. */ -extern PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image height in pixels. */ -extern PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image bit_depth. */ -extern PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image color_type. */ -extern PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image filter_type. */ -extern PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image interlace_type. */ -extern PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image compression_type. */ -extern PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image resolution in pixels per meter, from pHYs chunk data. */ -extern PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns pixel aspect ratio, computed from pHYs chunk data. */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -#endif - -/* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ -extern PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -#endif /* PNG_EASY_ACCESS_SUPPORTED */ - -/* Returns pointer to signature string read from PNG header */ -extern PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_structp png_ptr, -png_infop info_ptr)); - -#if defined(PNG_READ_bKGD_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_16p *background)); -#endif - -#if defined(PNG_bKGD_SUPPORTED) -extern PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_16p background)); -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr, - png_infop info_ptr, double *white_x, double *white_y, double *red_x, - double *red_y, double *green_x, double *green_y, double *blue_x, - double *blue_y)); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point *int_white_x, png_fixed_point - *int_white_y, png_fixed_point *int_red_x, png_fixed_point *int_red_y, - png_fixed_point *int_green_x, png_fixed_point *int_green_y, png_fixed_point - *int_blue_x, png_fixed_point *int_blue_y)); -#endif -#endif - -#if defined(PNG_cHRM_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr, - png_infop info_ptr, double white_x, double white_y, double red_x, - double red_y, double green_x, double green_y, double blue_x, double blue_y)); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -#endif -#endif - -#if defined(PNG_READ_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr, - png_infop info_ptr, double *file_gamma)); -#endif -extern PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point *int_file_gamma)); -#endif - -#if defined(PNG_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr, - png_infop info_ptr, double file_gamma)); -#endif -extern PNG_EXPORT(void,png_set_gAMA_fixed) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_file_gamma)); -#endif - -#if defined(PNG_READ_hIST_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_16p *hist)); -#endif - -#if defined(PNG_hIST_SUPPORTED) -extern PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_16p hist)); -#endif - -extern PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 *width, png_uint_32 *height, - int *bit_depth, int *color_type, int *interlace_method, - int *compression_method, int *filter_method)); - -extern PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_method, int compression_method, - int filter_method)); - -#if defined(PNG_READ_oFFs_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, - int *unit_type)); -#endif - -#if defined(PNG_oFFs_SUPPORTED) -extern PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_int_32 offset_x, png_int_32 offset_y, - int unit_type)); -#endif - -#if defined(PNG_READ_pCAL_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1, - int *type, int *nparams, png_charp *units, png_charpp *params)); -#endif - -#if defined(PNG_pCAL_SUPPORTED) -extern PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, - int type, int nparams, png_charp units, png_charpp params)); -#endif - -#if defined(PNG_READ_pHYs_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); -#endif - -#if defined(PNG_pHYs_SUPPORTED) -extern PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); -#endif - -extern PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_colorp *palette, int *num_palette)); - -extern PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_colorp palette, int num_palette)); - -#if defined(PNG_READ_sBIT_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_8p *sig_bit)); -#endif - -#if defined(PNG_sBIT_SUPPORTED) -extern PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_8p sig_bit)); -#endif - -#if defined(PNG_READ_sRGB_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr, - png_infop info_ptr, int *intent)); -#endif - -#if defined(PNG_sRGB_SUPPORTED) -extern PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr, - png_infop info_ptr, int intent)); -extern PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr, - png_infop info_ptr, int intent)); -#endif - -#if defined(PNG_READ_iCCP_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charpp name, int *compression_type, - png_charpp profile, png_uint_32 *proflen)); - /* Note to maintainer: profile should be png_bytepp */ -#endif - -#if defined(PNG_iCCP_SUPPORTED) -extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charp name, int compression_type, - png_charp profile, png_uint_32 proflen)); - /* Note to maintainer: profile should be png_bytep */ -#endif - -#if defined(PNG_READ_sPLT_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_sPLT_tpp entries)); -#endif - -#if defined(PNG_sPLT_SUPPORTED) -extern PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_sPLT_tp entries, int nentries)); -#endif - -#if defined(PNG_READ_TEXT_SUPPORTED) -/* png_get_text also returns the number of text chunks in *num_text */ -extern PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_textp *text_ptr, int *num_text)); -#endif - -/* - * Note while png_set_text() will accept a structure whose text, - * language, and translated keywords are NULL pointers, the structure - * returned by png_get_text will always contain regular - * zero-terminated C strings. They might be empty strings but - * they will never be NULL pointers. - */ - -#if defined(PNG_TEXT_SUPPORTED) -extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_textp text_ptr, int num_text)); -#endif - -#if defined(PNG_READ_tIME_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_timep *mod_time)); -#endif - -#if defined(PNG_tIME_SUPPORTED) -extern PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_timep mod_time)); -#endif - -#if defined(PNG_READ_tRNS_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep *trans, int *num_trans, - png_color_16p *trans_values)); -#endif - -#if defined(PNG_tRNS_SUPPORTED) -extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep trans, int num_trans, - png_color_16p trans_values)); -#endif - -#if defined(PNG_tRNS_SUPPORTED) -#endif - -#if defined(PNG_READ_sCAL_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, int *unit, double *width, double *height)); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr, - png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight)); -#endif -#endif -#endif /* PNG_READ_sCAL_SUPPORTED */ - -#if defined(PNG_sCAL_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, int unit, double width, double height)); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr, - png_infop info_ptr, int unit, png_charp swidth, png_charp sheight)); -#endif -#endif /* PNG_READ_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) -/* provide a list of chunks and how they are to be handled, if the built-in - handling or default unknown chunk handling is not desired. Any chunks not - listed will be handled in the default manner. The IHDR and IEND chunks - must not be listed. - keep = 0: follow default behavour - = 1: do not keep - = 2: keep only if safe-to-copy - = 3: keep even if unsafe-to-copy -*/ -extern PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp - png_ptr, int keep, png_bytep chunk_list, int num_chunks)); -extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)); -extern PNG_EXPORT(void, png_set_unknown_chunk_location) - PNGARG((png_structp png_ptr, png_infop info_ptr, int chunk, int location)); -extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp - png_ptr, png_infop info_ptr, png_unknown_chunkpp entries)); -#endif - -/* Png_free_data() will turn off the "valid" flag for anything it frees. - If you need to turn it off for a chunk that your application has freed, - you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); */ -extern PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr, - png_infop info_ptr, int mask)); - -#if defined(PNG_INFO_IMAGE_SUPPORTED) -/* The "params" pointer is currently not used and is for future expansion. */ -extern PNG_EXPORT(void, png_read_png) PNGARG((png_structp png_ptr, - png_infop info_ptr, - int transforms, - png_voidp params)); -extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr, - png_infop info_ptr, - int transforms, - png_voidp params)); -#endif - -/* Define PNG_DEBUG at compile time for debugging information. Higher - * numbers for PNG_DEBUG mean more debugging information. This has - * only been added since version 0.95 so it is not implemented throughout - * libpng yet, but more support will be added as needed. - */ -#ifdef PNG_DEBUG -#if (PNG_DEBUG > 0) -#if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER) -#include -#if (PNG_DEBUG > 1) -#define png_debug(l,m) _RPT0(_CRT_WARN,m) -#define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m,p1) -#define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m,p1,p2) -#endif -#else /* PNG_DEBUG_FILE || !_MSC_VER */ -#ifndef PNG_DEBUG_FILE -#define PNG_DEBUG_FILE stderr -#endif /* PNG_DEBUG_FILE */ -#if (PNG_DEBUG > 1) -#define png_debug(l,m) \ -{ \ - int num_tabs=l; \ - fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ -} -#define png_debug1(l,m,p1) \ -{ \ - int num_tabs=l; \ - fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ -} -#define png_debug2(l,m,p1,p2) \ -{ \ - int num_tabs=l; \ - fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ -} -#endif /* (PNG_DEBUG > 1) */ -#endif /* _MSC_VER */ -#endif /* (PNG_DEBUG > 0) */ -#endif /* PNG_DEBUG */ -#ifndef png_debug -#define png_debug(l, m) -#endif -#ifndef png_debug1 -#define png_debug1(l, m, p1) -#endif -#ifndef png_debug2 -#define png_debug2(l, m, p1, p2) -#endif - -extern PNG_EXPORT(png_bytep,png_sig_bytes) PNGARG((void)); - -extern PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr)); - -#ifdef PNG_MNG_FEATURES_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp - png_ptr, png_uint_32 mng_features_permitted)); -#endif - -#if 0 /* delay these until version 1.2.0 */ -/* png.c, pnggccrd.c, or pngvcrd.c */ -extern PNG_EXPORT(int,png_mmx_support) PNGARG((void)); -#endif - -/* Maintainer: Put new public prototypes here ^, in libpng.3, and project defs */ - -#define PNG_HEADER_VERSION_STRING \ - " libpng version 1.0.9 - January 31, 2001 (header)\n" - -#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED -/* With these routines we avoid an integer divide, which will be slower on - * most machines. However, it does take more operations than the corresponding - * divide method, so it may be slower on a few RISC systems. There are two - * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. - * - * Note that the rounding factors are NOT supposed to be the same! 128 and - * 32768 are correct for the NODIV code; 127 and 32767 are correct for the - * standard method. - * - * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] - */ - - /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ - -# define png_composite(composite, fg, alpha, bg) \ - { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) * (png_uint_16)(alpha) \ - + (png_uint_16)(bg)*(png_uint_16)(255 - \ - (png_uint_16)(alpha)) + (png_uint_16)128); \ - (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } - -# define png_composite_16(composite, fg, alpha, bg) \ - { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) * (png_uint_32)(alpha) \ - + (png_uint_32)(bg)*(png_uint_32)(65535L - \ - (png_uint_32)(alpha)) + (png_uint_32)32768L); \ - (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } - -#else /* standard method using integer division */ - -# define png_composite(composite, fg, alpha, bg) \ - (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ - (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ - (png_uint_16)127) / 255) - -# define png_composite_16(composite, fg, alpha, bg) \ - (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ - (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \ - (png_uint_32)32767) / (png_uint_32)65535L) - -#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ - -/* These next functions are used internally in the code. They generally - * shouldn't be used unless you are writing code to add or replace some - * functionality in libpng. More information about most functions can - * be found in the files where the functions are located. - */ - -#if defined(PNG_INTERNAL) - -/* Various modes of operation. Note that after an init, mode is set to - * zero automatically when the structure is created. - */ -#define PNG_HAVE_IHDR 0x01 -#define PNG_HAVE_PLTE 0x02 -#define PNG_HAVE_IDAT 0x04 -#define PNG_AFTER_IDAT 0x08 -#define PNG_HAVE_IEND 0x10 -#define PNG_HAVE_gAMA 0x20 -#define PNG_HAVE_cHRM 0x40 -#define PNG_HAVE_sRGB 0x80 -#define PNG_HAVE_CHUNK_HEADER 0x100 -#define PNG_WROTE_tIME 0x200 -#define PNG_WROTE_INFO_BEFORE_PLTE 0x400 -#define PNG_BACKGROUND_IS_GRAY 0x800 -#define PNG_HAVE_PNG_SIGNATURE 0x1000 - -/* flags for the transformations the PNG library does on the image data */ -#define PNG_BGR 0x0001 -#define PNG_INTERLACE 0x0002 -#define PNG_PACK 0x0004 -#define PNG_SHIFT 0x0008 -#define PNG_SWAP_BYTES 0x0010 -#define PNG_INVERT_MONO 0x0020 -#define PNG_DITHER 0x0040 -#define PNG_BACKGROUND 0x0080 -#define PNG_BACKGROUND_EXPAND 0x0100 - /* 0x0200 unused */ -#define PNG_16_TO_8 0x0400 -#define PNG_RGBA 0x0800 -#define PNG_EXPAND 0x1000 -#define PNG_GAMMA 0x2000 -#define PNG_GRAY_TO_RGB 0x4000 -#define PNG_FILLER 0x8000L -#define PNG_PACKSWAP 0x10000L -#define PNG_SWAP_ALPHA 0x20000L -#define PNG_STRIP_ALPHA 0x40000L -#define PNG_INVERT_ALPHA 0x80000L -#define PNG_USER_TRANSFORM 0x100000L -#define PNG_RGB_TO_GRAY_ERR 0x200000L -#define PNG_RGB_TO_GRAY_WARN 0x400000L -#define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */ - -/* flags for png_create_struct */ -#define PNG_STRUCT_PNG 0x0001 -#define PNG_STRUCT_INFO 0x0002 - -/* Scaling factor for filter heuristic weighting calculations */ -#define PNG_WEIGHT_SHIFT 8 -#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) -#define PNG_COST_SHIFT 3 -#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) - -/* flags for the png_ptr->flags rather than declaring a byte for each one */ -#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 -#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 -#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 -#define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 -#define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 -#define PNG_FLAG_ZLIB_FINISHED 0x0020 -#define PNG_FLAG_ROW_INIT 0x0040 -#define PNG_FLAG_FILLER_AFTER 0x0080 -#define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 -#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 -#define PNG_FLAG_CRC_CRITICAL_USE 0x0400 -#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 -#define PNG_FLAG_FREE_PLTE 0x1000 -#define PNG_FLAG_FREE_TRNS 0x2000 -#define PNG_FLAG_FREE_HIST 0x4000 -#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L -#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L -#define PNG_FLAG_LIBRARY_MISMATCH 0x20000L - -/* For use in png_set_keep_unknown, png_handle_as_unknown */ -#define HANDLE_CHUNK_AS_DEFAULT 0 -#define HANDLE_CHUNK_NEVER 1 -#define HANDLE_CHUNK_IF_SAFE 2 -#define HANDLE_CHUNK_ALWAYS 3 - -#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ - PNG_FLAG_CRC_ANCILLARY_NOWARN) - -#define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \ - PNG_FLAG_CRC_CRITICAL_IGNORE) - -#define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ - PNG_FLAG_CRC_CRITICAL_MASK) - -/* save typing and make code easier to understand */ -#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ - abs((int)((c1).green) - (int)((c2).green)) + \ - abs((int)((c1).blue) - (int)((c2).blue))) - -/* variables declared in png.c - only it needs to define PNG_NO_EXTERN */ -#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN) -/* place to hold the signature string for a PNG file. */ -#ifdef PNG_USE_GLOBAL_ARRAYS - PNG_EXPORT_VAR (const png_byte FARDATA) png_sig[8]; -#else -#define png_sig png_sig_bytes(NULL) -#endif -#endif /* PNG_NO_EXTERN */ - -/* Constant strings for known chunk types. If you need to add a chunk, - * define the name here, and add an invocation of the macro in png.c and - * wherever it's needed. - */ -#define PNG_IHDR const png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'} -#define PNG_IDAT const png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'} -#define PNG_IEND const png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'} -#define PNG_PLTE const png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'} -#define PNG_bKGD const png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'} -#define PNG_cHRM const png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'} -#define PNG_gAMA const png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'} -#define PNG_hIST const png_byte png_hIST[5] = {104, 73, 83, 84, '\0'} -#define PNG_iCCP const png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'} -#define PNG_iTXt const png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'} -#define PNG_oFFs const png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'} -#define PNG_pCAL const png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'} -#define PNG_sCAL const png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'} -#define PNG_pHYs const png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'} -#define PNG_sBIT const png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'} -#define PNG_sPLT const png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'} -#define PNG_sRGB const png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'} -#define PNG_tEXt const png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'} -#define PNG_tIME const png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} -#define PNG_tRNS const png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} -#define PNG_zTXt const png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} - -#ifdef PNG_USE_GLOBAL_ARRAYS -PNG_EXPORT_VAR (const png_byte FARDATA) png_IHDR[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_IDAT[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_IEND[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_PLTE[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_bKGD[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_cHRM[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_gAMA[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_hIST[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_iCCP[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_iTXt[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_oFFs[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_pCAL[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_sCAL[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_pHYs[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_sBIT[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_sPLT[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_sRGB[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_tEXt[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_tIME[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_tRNS[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_zTXt[5]; -#endif /* PNG_USE_GLOBAL_ARRAYS */ - - -/* Inline macros to do direct reads of bytes from the input buffer. These - * require that you are using an architecture that uses PNG byte ordering - * (MSB first) and supports unaligned data storage. I think that PowerPC - * in big-endian mode and 680x0 are the only ones that will support this. - * The x86 line of processors definitely do not. The png_get_int_32() - * routine also assumes we are using two's complement format for negative - * values, which is almost certainly true. - */ -#if defined(PNG_READ_BIG_ENDIAN_SUPPORTED) -# if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_READ_oFFs_SUPPORTED) -# define png_get_int_32(buf) ( *((png_int_32p) (buf))) -# endif -# define png_get_uint_32(buf) ( *((png_uint_32p) (buf))) -# define png_get_uint_16(buf) ( *((png_uint_16p) (buf))) -#else -# if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_READ_oFFs_SUPPORTED) -PNG_EXTERN png_int_32 png_get_int_32 PNGARG((png_bytep buf)); -# endif -PNG_EXTERN png_uint_32 png_get_uint_32 PNGARG((png_bytep buf)); -PNG_EXTERN png_uint_16 png_get_uint_16 PNGARG((png_bytep buf)); -#endif /* !PNG_READ_BIG_ENDIAN_SUPPORTED */ - -/* Initialize png_ptr struct for reading, and allocate any other memory. - * (old interface - DEPRECATED - use png_create_read_struct instead). - */ -extern PNG_EXPORT(void,png_read_init) PNGARG((png_structp png_ptr)); -#define png_read_init(png_ptr) png_read_init_2(png_ptr, \ - PNG_LIBPNG_VER_STRING, sizeof(png_struct), sizeof(png_info)); -extern PNG_EXPORT(void,png_read_init_2) PNGARG((png_structp png_ptr, - png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t - png_info_size)); - -/* Initialize png_ptr struct for writing, and allocate any other memory. - * (old interface - DEPRECATED - use png_create_write_struct instead). - */ -extern PNG_EXPORT(void,png_write_init) PNGARG((png_structp png_ptr)); -#define png_write_init(png_ptr) png_write_init_2(png_ptr, \ - PNG_LIBPNG_VER_STRING, sizeof(png_struct), sizeof(png_info)); -extern PNG_EXPORT(void,png_write_init_2) PNGARG((png_structp png_ptr, - png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t - png_info_size)); - -/* Allocate memory for an internal libpng struct */ -PNG_EXTERN png_voidp png_create_struct PNGARG((int type)); - -/* Free memory from internal libpng struct */ -PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); - -PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr - malloc_fn)); -PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, - png_free_ptr free_fn)); - -/* Free any memory that info_ptr points to and reset struct. */ -PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* Function to allocate memory for zlib. */ -PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size)); - -/* Function to free memory for zlib */ -PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); - -/* Reset the CRC variable */ -PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); - -/* Write the "data" buffer to whatever output you are using. */ -PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); - -/* Read data from whatever input you are using into the "data" buffer */ -PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); - -/* Read bytes into buf, and update png_ptr->crc */ -PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, - png_size_t length)); - -/* Decompress data in a chunk that uses compression */ -#if defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) || \ - defined(PNG_READ_iCCP_SUPPORTED) || defined(PNG_READ_sPLT_SUPPORTED) -PNG_EXTERN png_charp png_decompress_chunk PNGARG((png_structp png_ptr, - int comp_type, png_charp chunkdata, png_size_t chunklength, - png_size_t prefix_length, png_size_t *data_length)); -#endif - -/* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ -PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); - -/* Read the CRC from the file and compare it to the libpng calculated CRC */ -PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); - -/* Calculate the CRC over a section of data. Note that we are only - * passing a maximum of 64K on systems that have this as a memory limit, - * since this is the maximum buffer size we can specify. - */ -PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr, - png_size_t length)); - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); -#endif - -/* Place a 32-bit number into a buffer in PNG byte order (big-endian). - * The only currently known PNG chunks that use signed numbers are - * the ancillary extension chunks, oFFs and pCAL. - */ -PNG_EXTERN void png_save_uint_32 PNGARG((png_bytep buf, png_uint_32 i)); - -#if defined(PNG_WRITE_pCAL_SUPPORTED) -PNG_EXTERN void png_save_int_32 PNGARG((png_bytep buf, png_int_32 i)); -#endif - -/* Place a 16-bit number into a buffer in PNG byte order. - * The parameter is declared unsigned int, not png_uint_16, - * just to avoid potential problems on pre-ANSI C compilers. - */ -PNG_EXTERN void png_save_uint_16 PNGARG((png_bytep buf, unsigned int i)); - -/* simple function to write the signature */ -PNG_EXTERN void png_write_sig PNGARG((png_structp png_ptr)); - -/* write various chunks */ - -/* Write the IHDR chunk, and update the png_struct with the necessary - * information. - */ -PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, - png_uint_32 height, - int bit_depth, int color_type, int compression_method, int filter_method, - int interlace_method)); - -PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, png_colorp palette, - png_uint_32 num_pal)); - -PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); - -PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); - -#if defined(PNG_WRITE_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, png_fixed_point - file_gamma)); -#endif -#endif - -#if defined(PNG_WRITE_sBIT_SUPPORTED) -PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit, - int color_type)); -#endif - -#if defined(PNG_WRITE_cHRM_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, - double white_x, double white_y, - double red_x, double red_y, double green_x, double green_y, - double blue_x, double blue_y)); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, - png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -#endif -#endif - -#if defined(PNG_WRITE_sRGB_SUPPORTED) -PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, - int intent)); -#endif - -#if defined(PNG_WRITE_iCCP_SUPPORTED) -PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, - png_charp name, int compression_type, - png_charp profile, int proflen)); - /* Note to maintainer: profile should be png_bytep */ -#endif - -#if defined(PNG_WRITE_sPLT_SUPPORTED) -PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, - png_sPLT_tp palette)); -#endif - -#if defined(PNG_WRITE_tRNS_SUPPORTED) -PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans, - png_color_16p values, int number, int color_type)); -#endif - -#if defined(PNG_WRITE_bKGD_SUPPORTED) -PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, - png_color_16p values, int color_type)); -#endif - -#if defined(PNG_WRITE_hIST_SUPPORTED) -PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist, - int num_hist)); -#endif - -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ - defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) -PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, - png_charp key, png_charpp new_key)); -#endif - -#if defined(PNG_WRITE_tEXt_SUPPORTED) -PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_charp key, - png_charp text, png_size_t text_len)); -#endif - -#if defined(PNG_WRITE_zTXt_SUPPORTED) -PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_charp key, - png_charp text, png_size_t text_len, int compression)); -#endif - -#if defined(PNG_WRITE_iTXt_SUPPORTED) -PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, - int compression, png_charp key, png_charp lang, png_charp lang_key, - png_charp text)); -#endif - -#if defined(PNG_WRITE_oFFs_SUPPORTED) -PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, - png_uint_32 x_offset, png_uint_32 y_offset, int unit_type)); -#endif - -#if defined(PNG_WRITE_pCAL_SUPPORTED) -PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, - png_int_32 X0, png_int_32 X1, int type, int nparams, - png_charp units, png_charpp params)); -#endif - -#if defined(PNG_WRITE_pHYs_SUPPORTED) -PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, - png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, - int unit_type)); -#endif - -#if defined(PNG_WRITE_tIME_SUPPORTED) -PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, - png_timep mod_time)); -#endif - -#if defined(PNG_WRITE_sCAL_SUPPORTED) -#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO) -PNG_EXTERN void png_write_sCAL PNGARG((png_structp png_ptr, - int unit, double width, double height)); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, - int unit, png_charp width, png_charp height)); -#endif -#endif -#endif - -/* Called when finished processing a row of data */ -PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); - -/* Internal use only. Called before first row of data */ -PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); - -#if defined(PNG_READ_GAMMA_SUPPORTED) -PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr)); -#endif - -/* combine a row of data, dealing with alpha, etc. if requested */ -PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, - int mask)); - -#if defined(PNG_READ_INTERLACING_SUPPORTED) -/* expand an interlaced row */ -/* OLD interface: -PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass, png_uint_32 transformations)); - */ -PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr)); -#endif - -/* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ - -#if defined(PNG_WRITE_INTERLACING_SUPPORTED) -/* grab pixels out of a row for an interlaced pass */ -PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass)); -#endif - -/* unfilter a row */ -PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr, - png_row_infop row_info, png_bytep row, png_bytep prev_row, int filter)); - -/* Choose the best filter to use and filter the row data */ -PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, - png_row_infop row_info)); - -/* Write out the filtered row. */ -PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr, - png_bytep filtered_row)); -/* finish a row while reading, dealing with interlacing passes, etc. */ -PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); - -/* initialize the row buffers, etc. */ -PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); -/* optional call to update the users info structure */ -PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* these are the functions that do the transformations */ -#if defined(PNG_READ_FILLER_SUPPORTED) -PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 filler, png_uint_32 flags)); -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_WRITE_FILLER_SUPPORTED) || \ - defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_strip_filler PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 flags)); -#endif - -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) -PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) -PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, png_row_infop - row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) -PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) -PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) -PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, png_bytep row, - png_color_8p sig_bits)); -#endif - -#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) -PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) -PNG_EXTERN void png_do_dither PNGARG((png_row_infop row_info, - png_bytep row, png_bytep palette_lookup, png_bytep dither_lookup)); - -# if defined(PNG_CORRECT_PALETTE_SUPPORTED) -PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, - png_colorp palette, int num_palette)); -# endif -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_WRITE_PACK_SUPPORTED) -PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 bit_depth)); -#endif - -#if defined(PNG_WRITE_SHIFT_SUPPORTED) -PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, png_bytep row, - png_color_8p bit_depth)); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) -PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, - png_color_16p trans_values, png_color_16p background, - png_color_16p background_1, - png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, - png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, - png_uint_16pp gamma_16_to_1, int gamma_shift)); -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) -PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, png_bytep row, - png_bytep gamma_table, png_uint_16pp gamma_16_table, - int gamma_shift)); -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) -PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, - png_bytep row, png_colorp palette, png_bytep trans, int num_trans)); -PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, - png_bytep row, png_color_16p trans_value)); -#endif - -/* The following decodes the appropriate chunks, and does error correction, - * then calls the appropriate callback for the chunk if it is valid. - */ - -/* decode the IHDR chunk */ -PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); - -#if defined(PNG_READ_bKGD_SUPPORTED) -PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) -PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_gAMA_SUPPORTED) -PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_hIST_SUPPORTED) -PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_iCCP_SUPPORTED) -extern void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif /* PNG_READ_iCCP_SUPPORTED */ - -#if defined(PNG_READ_iTXt_SUPPORTED) -PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_oFFs_SUPPORTED) -PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_pCAL_SUPPORTED) -PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_pHYs_SUPPORTED) -PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_sBIT_SUPPORTED) -PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_sCAL_SUPPORTED) -PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_sPLT_SUPPORTED) -extern void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif /* PNG_READ_sPLT_SUPPORTED */ - -#if defined(PNG_READ_sRGB_SUPPORTED) -PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_tEXt_SUPPORTED) -PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_tIME_SUPPORTED) -PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_tRNS_SUPPORTED) -PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_zTXt_SUPPORTED) -PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -PNG_EXTERN int png_handle_as_unknown PNGARG((png_structp png_ptr, png_bytep - chunk_name)); -#endif - -PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); - -PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, - png_bytep chunk_name)); - -/* handle the transformations for reading and writing */ -PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr)); - -PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, - png_uint_32 length)); -PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_fill_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t length)); -PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); -PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); -#if defined(PNG_READ_tEXt_SUPPORTED) -PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) -PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif -#if defined(PNG_READ_iTXt_SUPPORTED) -PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif - -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - -#ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); -PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ - -#endif /* PNG_INTERNAL */ - -#ifdef __cplusplus -} -#endif - -#endif /* PNG_VERSION_INFO_ONLY */ -/* do not put anything past this line */ -#endif /* PNG_H */ diff --git a/libraries/libpng-1.0.9/pngasmrd.h b/libraries/libpng-1.0.9/pngasmrd.h deleted file mode 100644 index caefcc8..0000000 --- a/libraries/libpng-1.0.9/pngasmrd.h +++ /dev/null @@ -1,11 +0,0 @@ -/* pngasmrd.h - assembler version of utilities to read a PNG file - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 2001 Glenn Randers-Pehrson - * - */ - -/* This file is obsolete in libpng-1.0.9 and later; its contents now appear - * at the end of pngconf.h. - */ diff --git a/libraries/libpng-1.0.9/pngbar.jpg b/libraries/libpng-1.0.9/pngbar.jpg deleted file mode 100644 index e4dcbfd..0000000 Binary files a/libraries/libpng-1.0.9/pngbar.jpg and /dev/null differ diff --git a/libraries/libpng-1.0.9/pngbar.png b/libraries/libpng-1.0.9/pngbar.png deleted file mode 100644 index d3f7221..0000000 Binary files a/libraries/libpng-1.0.9/pngbar.png and /dev/null differ diff --git a/libraries/libpng-1.0.9/pngconf.h b/libraries/libpng-1.0.9/pngconf.h deleted file mode 100644 index 4a7fa2c..0000000 --- a/libraries/libpng-1.0.9/pngconf.h +++ /dev/null @@ -1,1264 +0,0 @@ -/* pngconf.h - machine configurable file for libpng - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - */ - -/* Any machine specific code is near the front of this file, so if you - * are configuring libpng for a machine, you may want to read the section - * starting here down to where it starts to typedef png_color, png_text, - * and png_info. - */ - -#ifndef PNGCONF_H -#define PNGCONF_H - -/* This is the size of the compression buffer, and thus the size of - * an IDAT chunk. Make this whatever size you feel is best for your - * machine. One of these will be allocated per png_struct. When this - * is full, it writes the data to the disk, and does some other - * calculations. Making this an extremely small size will slow - * the library down, but you may want to experiment to determine - * where it becomes significant, if you are concerned with memory - * usage. Note that zlib allocates at least 32Kb also. For readers, - * this describes the size of the buffer available to read the data in. - * Unless this gets smaller than the size of a row (compressed), - * it should not make much difference how big this is. - */ - -#ifndef PNG_ZBUF_SIZE -# define PNG_ZBUF_SIZE 8192 -#endif - -#ifndef PNG_NO_FLOATING_POINT_SUPPORTED -# define PNG_FLOATING_POINT_SUPPORTED -#endif - -/* If you are running on a machine where you cannot allocate more - * than 64K of memory at once, uncomment this. While libpng will not - * normally need that much memory in a chunk (unless you load up a very - * large file), zlib needs to know how big of a chunk it can use, and - * libpng thus makes sure to check any memory allocation to verify it - * will fit into memory. -#define PNG_MAX_MALLOC_64K - */ -#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) -# define PNG_MAX_MALLOC_64K -#endif - -/* Special munging to support doing things the 'cygwin' way: - * 'Normal' png-on-win32 defines/defaults: - * PNG_BUILD_DLL -- building dll - * PNG_USE_DLL -- building an application, linking to dll - * (no define) -- building static library, or building an - * application and linking to the static lib - * 'Cygwin' defines/defaults: - * PNG_BUILD_DLL -- building the dll - * (no define) -- building an application, linking to the dll - * PNG_STATIC -- building the static lib, or building an application - * that links to the static lib. - * ALL_STATIC -- building various static libs, or building an application - * that links to the static libs. - * Thus, - * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and - * this bit of #ifdefs will define the 'correct' config variables based on - * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but - * unnecessary. - */ -#if defined(__CYGWIN__) -# if defined(PNG_BUILD_DLL) -# if defined(PNG_USE_DLL) -# undef PNG_USE_DLL -# endif -# if !defined(PNG_DLL) -# define PNG_DLL -# endif -# if defined(PNG_STATIC) -# undef PNG_STATIC -# endif -# else -# if defined(ALL_STATIC) -# define PNG_STATIC -# endif -# if defined(PNG_STATIC) -# if defined(PNG_USE_DLL) -# undef PNG_USE_DLL -# endif -# if defined(PNG_DLL) -# undef PNG_DLL -# endif -# else -# if defined(PNG_USE_DLL) -# if !defined(PNG_DLL) -# define PNG_DLL -# endif -# else -# if defined(PNG_DLL) -# define PNG_USE_DLL -# else -# define PNG_USE_DLL -# define PNG_DLL -# endif -# endif -# endif -# endif -#endif - - -/* This protects us against compilers that run on a windowing system - * and thus don't have or would rather us not use the stdio types: - * stdin, stdout, and stderr. The only one currently used is stderr - * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will - * prevent these from being compiled and used. #defining PNG_NO_STDIO - * will also prevent these, plus will prevent the entire set of stdio - * macros and functions (FILE *, printf, etc.) from being compiled and used, - * unless (PNG_DEBUG > 0) has been #defined. - * - * #define PNG_NO_CONSOLE_IO - * #define PNG_NO_STDIO - */ - -#if defined(_WIN32_WCE) -# include - /* Console I/O functions are not supported on WindowsCE */ -# define PNG_NO_CONSOLE_IO -# ifdef PNG_DEBUG -# undef PNG_DEBUG -# endif -#endif - -#ifdef PNG_BUILD_DLL -# ifndef PNG_CONSOLE_IO_SUPPORTED -# ifndef PNG_NO_CONSOLE_IO -# define PNG_NO_CONSOLE_IO -# endif -# endif -#endif - -# ifdef PNG_NO_STDIO -# ifndef PNG_NO_CONSOLE_IO -# define PNG_NO_CONSOLE_IO -# endif -# ifdef PNG_DEBUG -# if (PNG_DEBUG > 0) -# include -# endif -# endif -# else -# if !defined(_WIN32_WCE) -/* "stdio.h" functions are not supported on WindowsCE */ -# include -# endif -# endif - -/* This macro protects us against machines that don't have function - * prototypes (ie K&R style headers). If your compiler does not handle - * function prototypes, define this macro and use the included ansi2knr. - * I've always been able to use _NO_PROTO as the indicator, but you may - * need to drag the empty declaration out in front of here, or change the - * ifdef to suit your own needs. - */ -#ifndef PNGARG - -#ifdef OF /* zlib prototype munger */ -# define PNGARG(arglist) OF(arglist) -#else - -#ifdef _NO_PROTO -# define PNGARG(arglist) () -#else -# define PNGARG(arglist) arglist -#endif /* _NO_PROTO */ - -#endif /* OF */ - -#endif /* PNGARG */ - -/* Try to determine if we are compiling on a Mac. Note that testing for - * just __MWERKS__ is not good enough, because the Codewarrior is now used - * on non-Mac platforms. - */ -#ifndef MACOS -# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \ - defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC) -# define MACOS -# endif -#endif - -/* enough people need this for various reasons to include it here */ -#if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE) -# include -#endif - -#ifndef PNG_SETJMP_NOT_SUPPORTED -# define PNG_SETJMP_SUPPORTED -#endif - -#ifdef PNG_SETJMP_SUPPORTED -/* This is an attempt to force a single setjmp behaviour on Linux. If - * the X config stuff didn't define _BSD_SOURCE we wouldn't need this. - */ - -# ifdef __linux__ -# ifdef _BSD_SOURCE -# define PNG_SAVE_BSD_SOURCE -# undef _BSD_SOURCE -# endif -# ifdef _SETJMP_H - __png.h__ already includes setjmp.h; - __dont__ include it again.; -# endif -# endif /* __linux__ */ - - /* include setjmp.h for error handling */ -# include - -# ifdef __linux__ -# ifdef PNG_SAVE_BSD_SOURCE -# define _BSD_SOURCE -# undef PNG_SAVE_BSD_SOURCE -# endif -# endif /* __linux__ */ -#endif /* PNG_SETJMP_SUPPORTED */ - -#if defined(_AIX) && defined(__xlC__) -/* This prevents "AIX/xlC" from generating an "index(s,c)" macro in strings.h - * that conflicts with libpng's png_color_16.index */ -# undef __STR__ -#endif - -#ifdef BSD -# include -#else -# include -#endif - -/* Other defines for things like memory and the like can go here. */ -#ifdef PNG_INTERNAL - -#include - -/* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which - * aren't usually used outside the library (as far as I know), so it is - * debatable if they should be exported at all. In the future, when it is - * possible to have run-time registry of chunk-handling functions, some of - * these will be made available again. -#define PNG_EXTERN extern - */ -#define PNG_EXTERN - -/* Other defines specific to compilers can go here. Try to keep - * them inside an appropriate ifdef/endif pair for portability. - */ - -#if defined(PNG_FLOATING_POINT_SUPPORTED) -# if defined(MACOS) - /* We need to check that hasn't already been included earlier - * as it seems it doesn't agree with , yet we should really use - * if possible. - */ -# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__) -# include -# endif -# else -# include -# endif -# if defined(_AMIGA) && defined(__SASC) && defined(_M68881) - /* Amiga SAS/C: We must include builtin FPU functions when compiling using - * MATH=68881 - */ -# include -# endif -#endif - -/* Codewarrior on NT has linking problems without this. */ -#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__) -# define PNG_ALWAYS_EXTERN -#endif - -/* For some reason, Borland C++ defines memcmp, etc. in mem.h, not - * stdlib.h like it should (I think). Or perhaps this is a C++ - * "feature"? - */ -#ifdef __TURBOC__ -# include -# include "alloc.h" -#endif - -#ifdef _MSC_VER -# include -#endif - -/* This controls how fine the dithering gets. As this allocates - * a largish chunk of memory (32K), those who are not as concerned - * with dithering quality can decrease some or all of these. - */ -#ifndef PNG_DITHER_RED_BITS -# define PNG_DITHER_RED_BITS 5 -#endif -#ifndef PNG_DITHER_GREEN_BITS -# define PNG_DITHER_GREEN_BITS 5 -#endif -#ifndef PNG_DITHER_BLUE_BITS -# define PNG_DITHER_BLUE_BITS 5 -#endif - -/* This controls how fine the gamma correction becomes when you - * are only interested in 8 bits anyway. Increasing this value - * results in more memory being used, and more pow() functions - * being called to fill in the gamma tables. Don't set this value - * less then 8, and even that may not work (I haven't tested it). - */ - -#ifndef PNG_MAX_GAMMA_8 -# define PNG_MAX_GAMMA_8 11 -#endif - -/* This controls how much a difference in gamma we can tolerate before - * we actually start doing gamma conversion. - */ -#ifndef PNG_GAMMA_THRESHOLD -# define PNG_GAMMA_THRESHOLD 0.05 -#endif - -#endif /* PNG_INTERNAL */ - -/* The following uses const char * instead of char * for error - * and warning message functions, so some compilers won't complain. - * If you do not want to use const, define PNG_NO_CONST here. - */ - -#ifndef PNG_NO_CONST -# define PNG_CONST const -#else -# define PNG_CONST -#endif - -/* The following defines give you the ability to remove code from the - * library that you will not be using. I wish I could figure out how to - * automate this, but I can't do that without making it seriously hard - * on the users. So if you are not using an ability, change the #define - * to and #undef, and that part of the library will not be compiled. If - * your linker can't find a function, you may want to make sure the - * ability is defined here. Some of these depend upon some others being - * defined. I haven't figured out all the interactions here, so you may - * have to experiment awhile to get everything to compile. If you are - * creating or using a shared library, you probably shouldn't touch this, - * as it will affect the size of the structures, and this will cause bad - * things to happen if the library and/or application ever change. - */ - -/* Any features you will not be using can be undef'ed here */ - -/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user - * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS - * on the compile line, then pick and choose which ones to define without - * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED - * if you only want to have a png-compliant reader/writer but don't need - * any of the extra transformations. This saves about 80 kbytes in a - * typical installation of the library. (PNG_NO_* form added in version - * 1.0.1c, for consistency) - */ - -/* The size of the png_text structure changed in libpng-1.0.6 when - * iTXt is supported. It is turned off by default, to support old apps - * that malloc the png_text structure instead of calling png_set_text() - * and letting libpng malloc it. It will be turned on by default in - * libpng-2.0.0. - */ - -#ifndef PNG_iTXt_SUPPORTED -# ifndef PNG_READ_iTXt_SUPPORTED -# define PNG_NO_READ_iTXt -# endif -# ifndef PNG_WRITE_iTXt_SUPPORTED -# define PNG_NO_WRITE_iTXt -# endif -#endif - -/* The following support, added after version 1.0.0, can be turned off here en - * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility - * with old applications that require the length of png_struct and png_info - * to remain unchanged. - */ - -#ifdef PNG_LEGACY_SUPPORTED -# define PNG_NO_FREE_ME -# define PNG_NO_READ_UNKNOWN_CHUNKS -# define PNG_NO_WRITE_UNKNOWN_CHUNKS -# define PNG_NO_READ_USER_CHUNKS -# define PNG_NO_READ_iCCP -# define PNG_NO_WRITE_iCCP -# define PNG_NO_READ_iTXt -# define PNG_NO_WRITE_iTXt -# define PNG_NO_READ_sCAL -# define PNG_NO_WRITE_sCAL -# define PNG_NO_READ_sPLT -# define PNG_NO_WRITE_sPLT -# define PNG_NO_INFO_IMAGE -# define PNG_NO_READ_RGB_TO_GRAY -# define PNG_NO_READ_USER_TRANSFORM -# define PNG_NO_WRITE_USER_TRANSFORM -# define PNG_NO_USER_MEM -# define PNG_NO_READ_EMPTY_PLTE -# define PNG_NO_MNG_FEATURES -# define PNG_NO_FIXED_POINT_SUPPORTED -#endif - -/* Ignore attempt to turn off both floating and fixed point support */ -#if !defined(PNG_FLOATING_POINT_SUPPORTED) || \ - !defined(PNG_NO_FIXED_POINT_SUPPORTED) -# define PNG_FIXED_POINT_SUPPORTED -#endif - -#ifndef PNG_NO_FREE_ME -# define PNG_FREE_ME_SUPPORTED -#endif - -#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \ - !defined(PNG_NO_READ_TRANSFORMS) -# define PNG_READ_TRANSFORMS_SUPPORTED -#endif -#if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \ - !defined(PNG_NO_WRITE_TRANSFORMS) -# define PNG_WRITE_TRANSFORMS_SUPPORTED -#endif - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -# ifndef PNG_NO_READ_EXPAND -# define PNG_READ_EXPAND_SUPPORTED -# endif -# ifndef PNG_NO_READ_SHIFT -# define PNG_READ_SHIFT_SUPPORTED -# endif -# ifndef PNG_NO_READ_PACK -# define PNG_READ_PACK_SUPPORTED -# endif -# ifndef PNG_NO_READ_BGR -# define PNG_READ_BGR_SUPPORTED -# endif -# ifndef PNG_NO_READ_SWAP -# define PNG_READ_SWAP_SUPPORTED -# endif -# ifndef PNG_NO_READ_PACKSWAP -# define PNG_READ_PACKSWAP_SUPPORTED -# endif -# ifndef PNG_NO_READ_INVERT -# define PNG_READ_INVERT_SUPPORTED -# endif -# ifndef PNG_NO_READ_DITHER -# define PNG_READ_DITHER_SUPPORTED -# endif -# ifndef PNG_NO_READ_BACKGROUND -# define PNG_READ_BACKGROUND_SUPPORTED -# endif -# ifndef PNG_NO_READ_16_TO_8 -# define PNG_READ_16_TO_8_SUPPORTED -# endif -# ifndef PNG_NO_READ_FILLER -# define PNG_READ_FILLER_SUPPORTED -# endif -# ifndef PNG_NO_READ_GAMMA -# define PNG_READ_GAMMA_SUPPORTED -# endif -# ifndef PNG_NO_READ_GRAY_TO_RGB -# define PNG_READ_GRAY_TO_RGB_SUPPORTED -# endif -# ifndef PNG_NO_READ_SWAP_ALPHA -# define PNG_READ_SWAP_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_READ_INVERT_ALPHA -# define PNG_READ_INVERT_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_READ_STRIP_ALPHA -# define PNG_READ_STRIP_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_READ_USER_TRANSFORM -# define PNG_READ_USER_TRANSFORM_SUPPORTED -# endif -# ifndef PNG_NO_READ_RGB_TO_GRAY -# define PNG_READ_RGB_TO_GRAY_SUPPORTED -# endif -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -#if !defined(PNG_NO_PROGRESSIVE_READ) && \ - !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */ -# define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */ -#endif /* about interlacing capability! You'll */ - /* still have interlacing unless you change the following line: */ - -#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */ - -#ifndef PNG_NO_READ_COMPOSITE_NODIV -# ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */ -# define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */ -# endif -#endif - -/* Enable if you need to support PNGs that are embedded in MNG - datastreams */ -/* -#ifndef PNG_NO_MNG_FEATURES -# define PNG_MNG_FEATURES_SUPPORTED -#endif -*/ - -/* Deprecated, will be removed from version 2.0.0 */ -#ifndef PNG_NO_READ_EMPTY_PLTE -# define PNG_READ_EMPTY_PLTE_SUPPORTED -#endif - -#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED -# ifndef PNG_NO_WRITE_SHIFT -# define PNG_WRITE_SHIFT_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_PACK -# define PNG_WRITE_PACK_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_BGR -# define PNG_WRITE_BGR_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_SWAP -# define PNG_WRITE_SWAP_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_PACKSWAP -# define PNG_WRITE_PACKSWAP_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_INVERT -# define PNG_WRITE_INVERT_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_FILLER -# define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */ -# endif -# ifndef PNG_NO_WRITE_SWAP_ALPHA -# define PNG_WRITE_SWAP_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_INVERT_ALPHA -# define PNG_WRITE_INVERT_ALPHA_SUPPORTED -# endif -# ifndef PNG_NO_WRITE_USER_TRANSFORM -# define PNG_WRITE_USER_TRANSFORM_SUPPORTED -# endif -#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */ - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) -# ifndef PNG_NO_USER_TRANSFORM_PTR -# define PNG_USER_TRANSFORM_PTR_SUPPORTED -# endif -#endif - -#define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant - encoders, but can cause trouble - if left undefined */ - -#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \ - defined(PNG_FLOATING_POINT_SUPPORTED) -# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED -#endif - -#ifndef PNG_NO_WRITE_FLUSH -# define PNG_WRITE_FLUSH_SUPPORTED -#endif - -/* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */ -#ifndef PNG_NO_WRITE_EMPTY_PLTE -# define PNG_WRITE_EMPTY_PLTE_SUPPORTED -#endif - -#ifndef PNG_NO_STDIO -# define PNG_TIME_RFC1123_SUPPORTED -#endif - -/* This adds extra functions in pngget.c for accessing data from the - * info pointer (added in version 0.99) - * png_get_image_width() - * png_get_image_height() - * png_get_bit_depth() - * png_get_color_type() - * png_get_compression_type() - * png_get_filter_type() - * png_get_interlace_type() - * png_get_pixel_aspect_ratio() - * png_get_pixels_per_meter() - * png_get_x_offset_pixels() - * png_get_y_offset_pixels() - * png_get_x_offset_microns() - * png_get_y_offset_microns() - */ -#ifndef PNG_NO_EASY_ACCESS -# define PNG_EASY_ACCESS_SUPPORTED -#endif - -/* PNG_ASSEMBLER_CODE will be enabled by default in version 1.2.0 - even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */ -#ifndef PNG_NO_ASSEMBLER_CODE -# if defined(PNG_USE_PNGVCRD) || defined(PNG_USE_PNGGCCRD) -# define PNG_ASSEMBLER_CODE_SUPPORTED -# define PNG_MMX_CODE_SUPPORTED -# endif -#endif - -/* These are currently experimental features, define them if you want */ - -/* very little testing */ -/* -#define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED -#ifndef PNG_NO_USER_MEM -# define PNG_USER_MEM_SUPPORTED -#endif -#ifndef PNG_NO_ZALLOC_ZERO -# define PNG_ZALLOC_ZERO -#endif -*/ - -/* This is only for PowerPC big-endian and 680x0 systems */ -/* some testing */ -/* -#define PNG_READ_BIG_ENDIAN_SUPPORTED -*/ - -/* Buggy compilers (e.g., gcc 2.7.2.2) need this */ -/* -#define PNG_NO_POINTER_INDEXING -*/ - -/* These functions are turned off by default, as they will be phased out. */ -/* -#define PNG_USELESS_TESTS_SUPPORTED -#define PNG_CORRECT_PALETTE_SUPPORTED -*/ - -/* Any chunks you are not interested in, you can undef here. The - * ones that allocate memory may be expecially important (hIST, - * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info - * a bit smaller. - */ - -#if !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \ - !defined(PNG_NO_READ_ANCILLARY_CHUNKS) -# define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED -#endif -#if !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \ - !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS) -# define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED -#endif - -#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED - -#ifdef PNG_NO_READ_TEXT -# define PNG_NO_READ_iTXt -# define PNG_NO_READ_tEXt -# define PNG_NO_READ_zTXt -#endif -#ifndef PNG_NO_READ_bKGD -# define PNG_READ_bKGD_SUPPORTED -# define PNG_bKGD_SUPPORTED -#endif -#ifndef PNG_NO_READ_cHRM -# define PNG_READ_cHRM_SUPPORTED -# define PNG_cHRM_SUPPORTED -#endif -#ifndef PNG_NO_READ_gAMA -# define PNG_READ_gAMA_SUPPORTED -# define PNG_gAMA_SUPPORTED -#endif -#ifndef PNG_NO_READ_hIST -# define PNG_READ_hIST_SUPPORTED -# define PNG_hIST_SUPPORTED -#endif -#ifndef PNG_NO_READ_iCCP -# define PNG_READ_iCCP_SUPPORTED -# define PNG_iCCP_SUPPORTED -#endif -#ifndef PNG_NO_READ_iTXt -# define PNG_READ_iTXt_SUPPORTED -# define PNG_iTXt_SUPPORTED -#endif -#ifndef PNG_NO_READ_oFFs -# define PNG_READ_oFFs_SUPPORTED -# define PNG_oFFs_SUPPORTED -#endif -#ifndef PNG_NO_READ_pCAL -# define PNG_READ_pCAL_SUPPORTED -# define PNG_pCAL_SUPPORTED -#endif -#ifndef PNG_NO_READ_sCAL -# define PNG_READ_sCAL_SUPPORTED -# define PNG_sCAL_SUPPORTED -#endif -#ifndef PNG_NO_READ_pHYs -# define PNG_READ_pHYs_SUPPORTED -# define PNG_pHYs_SUPPORTED -#endif -#ifndef PNG_NO_READ_sBIT -# define PNG_READ_sBIT_SUPPORTED -# define PNG_sBIT_SUPPORTED -#endif -#ifndef PNG_NO_READ_sPLT -# define PNG_READ_sPLT_SUPPORTED -# define PNG_sPLT_SUPPORTED -#endif -#ifndef PNG_NO_READ_sRGB -# define PNG_READ_sRGB_SUPPORTED -# define PNG_sRGB_SUPPORTED -#endif -#ifndef PNG_NO_READ_tEXt -# define PNG_READ_tEXt_SUPPORTED -# define PNG_tEXt_SUPPORTED -#endif -#ifndef PNG_NO_READ_tIME -# define PNG_READ_tIME_SUPPORTED -# define PNG_tIME_SUPPORTED -#endif -#ifndef PNG_NO_READ_tRNS -# define PNG_READ_tRNS_SUPPORTED -# define PNG_tRNS_SUPPORTED -#endif -#ifndef PNG_NO_READ_zTXt -# define PNG_READ_zTXt_SUPPORTED -# define PNG_zTXt_SUPPORTED -#endif -#ifndef PNG_NO_READ_UNKNOWN_CHUNKS -# define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED -# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED -# define PNG_UNKNOWN_CHUNKS_SUPPORTED -# endif -# ifndef PNG_NO_HANDLE_AS_UNKNOWN -# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED -# endif -#endif -#if !defined(PNG_NO_READ_USER_CHUNKS) && \ - defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) -# define PNG_READ_USER_CHUNKS_SUPPORTED -# define PNG_USER_CHUNKS_SUPPORTED -# ifdef PNG_NO_READ_UNKNOWN_CHUNKS -# undef PNG_NO_READ_UNKNOWN_CHUNKS -# endif -# ifdef PNG_NO_HANDLE_AS_UNKNOWN -# undef PNG_NO_HANDLE_AS_UNKNOWN -# endif -#endif -#ifndef PNG_NO_READ_OPT_PLTE -# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */ -#endif /* optional PLTE chunk in RGB and RGBA images */ -#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \ - defined(PNG_READ_zTXt_SUPPORTED) -# define PNG_READ_TEXT_SUPPORTED -# define PNG_TEXT_SUPPORTED -#endif - -#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */ - -#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED - -#ifdef PNG_NO_WRITE_TEXT -# define PNG_NO_WRITE_iTXt -# define PNG_NO_WRITE_tEXt -# define PNG_NO_WRITE_zTXt -#endif -#ifndef PNG_NO_WRITE_bKGD -# define PNG_WRITE_bKGD_SUPPORTED -# ifndef PNG_bKGD_SUPPORTED -# define PNG_bKGD_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_cHRM -# define PNG_WRITE_cHRM_SUPPORTED -# ifndef PNG_cHRM_SUPPORTED -# define PNG_cHRM_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_gAMA -# define PNG_WRITE_gAMA_SUPPORTED -# ifndef PNG_gAMA_SUPPORTED -# define PNG_gAMA_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_hIST -# define PNG_WRITE_hIST_SUPPORTED -# ifndef PNG_hIST_SUPPORTED -# define PNG_hIST_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_iCCP -# define PNG_WRITE_iCCP_SUPPORTED -# ifndef PNG_iCCP_SUPPORTED -# define PNG_iCCP_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_iTXt -# define PNG_WRITE_iTXt_SUPPORTED -# ifndef PNG_iTXt_SUPPORTED -# define PNG_iTXt_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_oFFs -# define PNG_WRITE_oFFs_SUPPORTED -# ifndef PNG_oFFs_SUPPORTED -# define PNG_oFFs_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_pCAL -# define PNG_WRITE_pCAL_SUPPORTED -# ifndef PNG_pCAL_SUPPORTED -# define PNG_pCAL_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_sCAL -# define PNG_WRITE_sCAL_SUPPORTED -# ifndef PNG_sCAL_SUPPORTED -# define PNG_sCAL_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_pHYs -# define PNG_WRITE_pHYs_SUPPORTED -# ifndef PNG_pHYs_SUPPORTED -# define PNG_pHYs_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_sBIT -# define PNG_WRITE_sBIT_SUPPORTED -# ifndef PNG_sBIT_SUPPORTED -# define PNG_sBIT_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_sPLT -# define PNG_WRITE_sPLT_SUPPORTED -# ifndef PNG_sPLT_SUPPORTED -# define PNG_sPLT_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_sRGB -# define PNG_WRITE_sRGB_SUPPORTED -# ifndef PNG_sRGB_SUPPORTED -# define PNG_sRGB_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_tEXt -# define PNG_WRITE_tEXt_SUPPORTED -# ifndef PNG_tEXt_SUPPORTED -# define PNG_tEXt_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_tIME -# define PNG_WRITE_tIME_SUPPORTED -# ifndef PNG_tIME_SUPPORTED -# define PNG_tIME_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_tRNS -# define PNG_WRITE_tRNS_SUPPORTED -# ifndef PNG_tRNS_SUPPORTED -# define PNG_tRNS_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_zTXt -# define PNG_WRITE_zTXt_SUPPORTED -# ifndef PNG_zTXt_SUPPORTED -# define PNG_zTXt_SUPPORTED -# endif -#endif -#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS -# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED -# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED -# define PNG_UNKNOWN_CHUNKS_SUPPORTED -# endif -# ifndef PNG_NO_HANDLE_AS_UNKNOWN -# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED -# endif -# endif -#endif -#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \ - defined(PNG_WRITE_zTXt_SUPPORTED) -# define PNG_WRITE_TEXT_SUPPORTED -# ifndef PNG_TEXT_SUPPORTED -# define PNG_TEXT_SUPPORTED -# endif -#endif - -#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */ - -/* Turn this off to disable png_read_png() and - * png_write_png() and leave the row_pointers member - * out of the info structure. - */ -#ifndef PNG_NO_INFO_IMAGE -# define PNG_INFO_IMAGE_SUPPORTED -#endif - -/* need the time information for reading tIME chunks */ -#if defined(PNG_tIME_SUPPORTED) -# if !defined(_WIN32_WCE) - /* "time.h" functions are not supported on WindowsCE */ -# include -# endif -#endif - -/* Some typedefs to get us started. These should be safe on most of the - * common platforms. The typedefs should be at least as large as the - * numbers suggest (a png_uint_32 must be at least 32 bits long), but they - * don't have to be exactly that size. Some compilers dislike passing - * unsigned shorts as function parameters, so you may be better off using - * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may - * want to have unsigned int for png_uint_32 instead of unsigned long. - */ - -typedef unsigned long png_uint_32; -typedef long png_int_32; -typedef unsigned short png_uint_16; -typedef short png_int_16; -typedef unsigned char png_byte; - -/* This is usually size_t. It is typedef'ed just in case you need it to - change (I'm not sure if you will or not, so I thought I'd be safe) */ -typedef size_t png_size_t; - -/* The following is needed for medium model support. It cannot be in the - * PNG_INTERNAL section. Needs modification for other compilers besides - * MSC. Model independent support declares all arrays and pointers to be - * large using the far keyword. The zlib version used must also support - * model independent data. As of version zlib 1.0.4, the necessary changes - * have been made in zlib. The USE_FAR_KEYWORD define triggers other - * changes that are needed. (Tim Wegner) - */ - -/* Separate compiler dependencies (problem here is that zlib.h always - defines FAR. (SJT) */ -#ifdef __BORLANDC__ -# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) -# define LDATA 1 -# else -# define LDATA 0 -# endif - /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ -# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) -# define PNG_MAX_MALLOC_64K -# if (LDATA != 1) -# ifndef FAR -# define FAR __far -# endif -# define USE_FAR_KEYWORD -# endif /* LDATA != 1 */ - /* Possibly useful for moving data out of default segment. - * Uncomment it if you want. Could also define FARDATA as - * const if your compiler supports it. (SJT) -# define FARDATA FAR - */ -# endif /* __WIN32__, __FLAT__, __CYGWIN__ */ -#endif /* __BORLANDC__ */ - - -/* Suggest testing for specific compiler first before testing for - * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, - * making reliance oncertain keywords suspect. (SJT) - */ - -/* MSC Medium model */ -#if defined(FAR) -# if defined(M_I86MM) -# define USE_FAR_KEYWORD -# define FARDATA FAR -# include -# endif -#endif - -/* SJT: default case */ -#ifndef FAR -# define FAR -#endif - -/* At this point FAR is always defined */ -#ifndef FARDATA -# define FARDATA -#endif - -/* Typedef for floating-point numbers that are converted - to fixed-point with a multiple of 100,000, e.g., int_gamma */ -typedef png_int_32 png_fixed_point; - -/* Add typedefs for pointers */ -typedef void FAR * png_voidp; -typedef png_byte FAR * png_bytep; -typedef png_uint_32 FAR * png_uint_32p; -typedef png_int_32 FAR * png_int_32p; -typedef png_uint_16 FAR * png_uint_16p; -typedef png_int_16 FAR * png_int_16p; -typedef PNG_CONST char FAR * png_const_charp; -typedef char FAR * png_charp; -typedef png_fixed_point FAR * png_fixed_point_p; - -#ifndef PNG_NO_STDIO -#if defined(_WIN32_WCE) -typedef HANDLE png_FILE_p; -#else -typedef FILE * png_FILE_p; -#endif -#endif - -#ifdef PNG_FLOATING_POINT_SUPPORTED -typedef double FAR * png_doublep; -#endif - -/* Pointers to pointers; i.e. arrays */ -typedef png_byte FAR * FAR * png_bytepp; -typedef png_uint_32 FAR * FAR * png_uint_32pp; -typedef png_int_32 FAR * FAR * png_int_32pp; -typedef png_uint_16 FAR * FAR * png_uint_16pp; -typedef png_int_16 FAR * FAR * png_int_16pp; -typedef PNG_CONST char FAR * FAR * png_const_charpp; -typedef char FAR * FAR * png_charpp; -typedef png_fixed_point FAR * FAR * png_fixed_point_pp; -#ifdef PNG_FLOATING_POINT_SUPPORTED -typedef double FAR * FAR * png_doublepp; -#endif - -/* Pointers to pointers to pointers; i.e., pointer to array */ -typedef char FAR * FAR * FAR * png_charppp; - -/* libpng typedefs for types in zlib. If zlib changes - * or another compression library is used, then change these. - * Eliminates need to change all the source files. - */ -typedef charf * png_zcharp; -typedef charf * FAR * png_zcharpp; -typedef z_stream FAR * png_zstreamp; - -/* - * Define PNG_BUILD_DLL if the module being built is a Windows - * LIBPNG DLL. - * - * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL. - * It is equivalent to Microsoft predefined macro _DLL that is - * automatically defined when you compile using the share - * version of the CRT (C Run-Time library) - * - * The cygwin mods make this behavior a little different: - * Define PNG_BUILD_DLL if you are building a dll for use with cygwin - * Define PNG_STATIC if you are building a static library for use with cygwin, - * -or- if you are building an application that you want to link to the - * static library. - * PNG_USE_DLL is defined by default (no user action needed) unless one of - * the other flags is defined. - */ - -#if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL)) -# define PNG_DLL -#endif -/* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib. - * When building a static lib, default to no GLOBAL ARRAYS, but allow - * command-line override - */ -#if defined(__CYGWIN__) -# if !defined(PNG_STATIC) -# if defined(PNG_USE_GLOBAL_ARRAYS) -# undef PNG_USE_GLOBAL_ARRAYS -# endif -# if !defined(PNG_USE_LOCAL_ARRAYS) -# define PNG_USE_LOCAL_ARRAYS -# endif -# else -# if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS) -# if defined(PNG_USE_GLOBAL_ARRAYS) -# undef PNG_USE_GLOBAL_ARRAYS -# endif -# endif -# endif -# if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS) -# define PNG_USE_LOCAL_ARRAYS -# endif -#endif - -/* Do not use global arrays (helps with building DLL's) - * They are no longer used in libpng itself, since version 1.0.5c, - * but might be required for some pre-1.0.5c applications. - */ -#if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS) -# if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL)) -# define PNG_USE_LOCAL_ARRAYS -# else -# define PNG_USE_GLOBAL_ARRAYS -# endif -#endif - - -#ifndef PNGAPI - -#if defined(__MINGW32__) || defined(__CYGWIN__) && !defined(PNG_MODULEDEF) -# ifndef PNG_NO_MODULEDEF -# define PNG_NO_MODULEDEF -# endif -#endif - -#if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF) -# define PNG_IMPEXP -#endif - -#if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \ - (( defined(_Windows) || defined(_WINDOWS) || \ - defined(WIN32) || defined(_WIN32) || defined(__WIN32__) \ - ) && !defined(__CYGWIN__)) - -# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) -# define PNGAPI __cdecl -# else -# define PNGAPI _cdecl -# endif - -# if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \ - 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */) -# define PNG_IMPEXP -# endif - -# if !defined(PNG_IMPEXP) - -# define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol -# define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol - - /* Borland/Microsoft */ -# if defined(_MSC_VER) || defined(__BORLANDC__) -# if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500) -# define PNG_EXPORT PNG_EXPORT_TYPE1 -# else -# define PNG_EXPORT PNG_EXPORT_TYPE2 -# if defined(PNG_BUILD_DLL) -# define PNG_IMPEXP __export -# else -# define PNG_IMPEXP /*__import*/ /* doesn't exist AFAIK in - VC++*/ -# endif /* Exists in Borland C++ for - C++ classes (== huge) */ -# endif -# endif - -# if !defined(PNG_IMPEXP) -# if defined(PNG_BUILD_DLL) -# define PNG_IMPEXP __declspec(dllexport) -# else -# define PNG_IMPEXP __declspec(dllimport) -# endif -# endif -# endif /* PNG_IMPEXP */ -#else /* !(DLL || non-cygwin WINDOWS) */ -# if defined(__CYGWIN__) && !defined(PNG_DLL) -# if !defined(PNG_IMPEXP) -# define PNG_IMPEXP -# endif -# define PNGAPI __cdecl -# else -# if 0 /* ... other platforms, with other meanings */ -# else -# define PNGAPI -# define PNG_IMPEXP -# endif -# endif -#endif -#endif - -#ifndef PNGAPI -# define PNGAPI -#endif -#ifndef PNG_IMPEXP -# define PNG_IMPEXP -#endif - -#ifndef PNG_EXPORT -# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol -#endif - -#ifdef PNG_USE_GLOBAL_ARRAYS -# ifndef PNG_EXPORT_VAR -# define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type -# endif -#endif - -/* User may want to use these so they are not in PNG_INTERNAL. Any library - * functions that are passed far data must be model independent. - */ - -#ifndef PNG_ABORT -# define PNG_ABORT() abort() -#endif - -#ifdef PNG_SETJMP_SUPPORTED -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#else -# define png_jmpbuf(png_ptr) \ - (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED) -#endif - -#if defined(USE_FAR_KEYWORD) /* memory model independent fns */ -/* use this to make far-to-near assignments */ -# define CHECK 1 -# define NOCHECK 0 -# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) -# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) -# define png_strcpy _fstrcpy -# define png_strlen _fstrlen -# define png_memcmp _fmemcmp /* SJT: added */ -# define png_memcpy _fmemcpy -# define png_memset _fmemset -#else /* use the usual functions */ -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) -# define png_strcpy strcpy -# define png_strlen strlen -# define png_memcmp memcmp /* SJT: added */ -# define png_memcpy memcpy -# define png_memset memset -#endif -/* End of memory model independent support */ - -/* Just a little check that someone hasn't tried to define something - * contradictory. - */ -#if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K) -# undef PNG_ZBUF_SIZE -# define PNG_ZBUF_SIZE 65536 -#endif - -/* Prior to libpng-1.0.9, this block was in pngasmrd.h */ -#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_INTERNAL) - -/* These are the default thresholds before the MMX code kicks in; if either - * rowbytes or bitdepth is below the threshold, plain C code is used. These - * can be overridden at runtime via the png_set_mmx_thresholds() call in - * libpng 1.2.0 and later. The values below were chosen by Intel. - */ - -#ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT -# define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT 128 /* >= */ -#endif -#ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT -# define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT 9 /* >= */ -#endif - -/* Set this in the makefile for VC++ on Pentium, not here. */ -/* Platform must be Pentium. Makefile must assemble and load pngvcrd.c . - * MMX will be detected at run time and used if present. - */ -#ifdef PNG_USE_PNGVCRD -# define PNG_HAVE_ASSEMBLER_COMBINE_ROW -# define PNG_HAVE_ASSEMBLER_READ_INTERLACE -# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW -#endif - -/* Set this in the makefile for gcc/as on Pentium, not here. */ -/* Platform must be Pentium. Makefile must assemble and load pnggccrd.c . - * MMX will be detected at run time and used if present. - */ -#ifdef PNG_USE_PNGGCCRD -# define PNG_HAVE_ASSEMBLER_COMBINE_ROW -# define PNG_HAVE_ASSEMBLER_READ_INTERLACE -# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW -#endif -/* - see pnggccrd.c for info about what is currently enabled */ - -#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */ - -#endif /* PNGCONF_H */ - diff --git a/libraries/libpng-1.0.9/pngerror.c b/libraries/libpng-1.0.9/pngerror.c deleted file mode 100644 index ffaac64..0000000 --- a/libraries/libpng-1.0.9/pngerror.c +++ /dev/null @@ -1,191 +0,0 @@ - -/* pngerror.c - stub functions for i/o and memory allocation - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This file provides a location for all error handling. Users who - * need special error handling are expected to write replacement functions - * and use png_set_error_fn() to use those functions. See the instructions - * at each function. - */ - -#define PNG_INTERNAL -#include "png.h" - -static void /* PRIVATE */ -png_default_error PNGARG((png_structp png_ptr, - png_const_charp message)); -static void /* PRIVATE */ -png_default_warning PNGARG((png_structp png_ptr, - png_const_charp message)); - -/* This function is called whenever there is a fatal error. This function - * should not be changed. If there is a need to handle errors differently, - * you should supply a replacement error function and use png_set_error_fn() - * to replace the error function at run-time. - */ -void PNGAPI -png_error(png_structp png_ptr, png_const_charp message) -{ - if (png_ptr->error_fn != NULL) - (*(png_ptr->error_fn))(png_ptr, message); - - /* if the following returns or doesn't exist, use the default function, - which will not return */ - png_default_error(png_ptr, message); -} - -/* This function is called whenever there is a non-fatal error. This function - * should not be changed. If there is a need to handle warnings differently, - * you should supply a replacement warning function and use - * png_set_error_fn() to replace the warning function at run-time. - */ -void PNGAPI -png_warning(png_structp png_ptr, png_const_charp message) -{ - if (png_ptr->warning_fn != NULL) - (*(png_ptr->warning_fn))(png_ptr, message); - else - png_default_warning(png_ptr, message); -} - -/* These utilities are used internally to build an error message that relates - * to the current chunk. The chunk name comes from png_ptr->chunk_name, - * this is used to prefix the message. The message is limited in length - * to 63 bytes, the name characters are output as hex digits wrapped in [] - * if the character is invalid. - */ -#define isnonalpha(c) ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97)) -static PNG_CONST char png_digit[16] = { - '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' -}; - -static void /* PRIVATE */ -png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp message) -{ - int iout = 0, iin = 0; - - while (iin < 4) - { - int c = png_ptr->chunk_name[iin++]; - if (isnonalpha(c)) - { - buffer[iout++] = '['; - buffer[iout++] = png_digit[(c & 0xf0) >> 4]; - buffer[iout++] = png_digit[c & 0x0f]; - buffer[iout++] = ']'; - } - else - { - buffer[iout++] = (png_byte)c; - } - } - - if (message == NULL) - buffer[iout] = 0; - else - { - buffer[iout++] = ':'; - buffer[iout++] = ' '; - png_memcpy(buffer+iout, message, 64); - buffer[iout+63] = 0; - } -} - -void PNGAPI -png_chunk_error(png_structp png_ptr, png_const_charp message) -{ - char msg[18+64]; - png_format_buffer(png_ptr, msg, message); - png_error(png_ptr, msg); -} - -void PNGAPI -png_chunk_warning(png_structp png_ptr, png_const_charp message) -{ - char msg[16+64]; - png_format_buffer(png_ptr, msg, message); - png_warning(png_ptr, msg); -} - -/* This is the default error handling function. Note that replacements for - * this function MUST NOT RETURN, or the program will likely crash. This - * function is used by default, or if the program supplies NULL for the - * error function pointer in png_set_error_fn(). - */ -static void /* PRIVATE */ -png_default_error(png_structp png_ptr, png_const_charp message) -{ -#ifndef PNG_NO_CONSOLE_IO - fprintf(stderr, "libpng error: %s\n", message); -#else - if (message) - /* make compiler happy */ ; -#endif - -#ifdef PNG_SETJMP_SUPPORTED -# ifdef USE_FAR_KEYWORD - { - jmp_buf jmpbuf; - png_memcpy(jmpbuf,png_ptr->jmpbuf,sizeof(jmp_buf)); - longjmp(jmpbuf, 1); - } -# else - longjmp(png_ptr->jmpbuf, 1); -# endif -#else - if (png_ptr) - /* make compiler happy */ ; - PNG_ABORT(); -#endif -} - -/* This function is called when there is a warning, but the library thinks - * it can continue anyway. Replacement functions don't have to do anything - * here if you don't want them to. In the default configuration, png_ptr is - * not used, but it is passed in case it may be useful. - */ -static void /* PRIVATE */ -png_default_warning(png_structp png_ptr, png_const_charp message) -{ -#ifndef PNG_NO_CONSOLE_IO - fprintf(stderr, "libpng warning: %s\n", message); -#else - if (message) - /* appease compiler */ ; -#endif - if (png_ptr) - return; -} - -/* This function is called when the application wants to use another method - * of handling errors and warnings. Note that the error function MUST NOT - * return to the calling routine or serious problems will occur. The return - * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1) - */ -void PNGAPI -png_set_error_fn(png_structp png_ptr, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warning_fn) -{ - png_ptr->error_ptr = error_ptr; - png_ptr->error_fn = error_fn; - png_ptr->warning_fn = warning_fn; -} - - -/* This function returns a pointer to the error_ptr associated with the user - * functions. The application should free any memory associated with this - * pointer before png_write_destroy and png_read_destroy are called. - */ -png_voidp PNGAPI -png_get_error_ptr(png_structp png_ptr) -{ - return ((png_voidp)png_ptr->error_ptr); -} - - - diff --git a/libraries/libpng-1.0.9/pnggccrd.c b/libraries/libpng-1.0.9/pnggccrd.c deleted file mode 100644 index fb34abc..0000000 --- a/libraries/libpng-1.0.9/pnggccrd.c +++ /dev/null @@ -1,5036 +0,0 @@ -/* pnggccrd.c - mixed C/assembler version of utilities to read a PNG file - * - * For Intel x86 CPU (Pentium-MMX or later) and GNU C compiler. - * - * See http://www.intel.com/drg/pentiumII/appnotes/916/916.htm - * and http://www.intel.com/drg/pentiumII/appnotes/923/923.htm - * for Intel's performance analysis of the MMX vs. non-MMX code. - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * Copyright (c) 1998, Intel Corporation - * - * Based on MSVC code contributed by Nirav Chhatrapati, Intel Corp., 1998. - * Interface to libpng contributed by Gilles Vollant, 1999. - * GNU C port by Greg Roelofs, 1999-2001. - * - * Lines 2350-4300 converted in place with intel2gas 1.3.1: - * - * intel2gas -mdI pnggccrd.c.partially-msvc -o pnggccrd.c - * - * and then cleaned up by hand. See http://hermes.terminal.at/intel2gas/ . - * - * NOTE: A sufficiently recent version of GNU as (or as.exe under DOS/Windows) - * is required to assemble the newer MMX instructions such as movq. - * For djgpp, see - * - * ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bnu281b.zip - * - * (or a later version in the same directory). For Linux, check your - * distribution's web site(s) or try these links: - * - * http://rufus.w3.org/linux/RPM/binutils.html - * http://www.debian.org/Packages/stable/devel/binutils.html - * ftp://ftp.slackware.com/pub/linux/slackware/slackware/slakware/d1/ - * binutils.tgz - * - * For other platforms, see the main GNU site: - * - * ftp://ftp.gnu.org/pub/gnu/binutils/ - * - * Version 2.5.2l.15 is definitely too old... - */ - -/* - * TEMPORARY PORTING NOTES AND CHANGELOG (mostly by Greg Roelofs) - * ===================================== - * - * 19991006: - * - fixed sign error in post-MMX cleanup code (16- & 32-bit cases) - * - * 19991007: - * - additional optimizations (possible or definite): - * x [DONE] write MMX code for 64-bit case (pixel_bytes == 8) [not tested] - * - write MMX code for 48-bit case (pixel_bytes == 6) - * - figure out what's up with 24-bit case (pixel_bytes == 3): - * why subtract 8 from width_mmx in the pass 4/5 case? - * (only width_mmx case) (near line 1606) - * x [DONE] replace pixel_bytes within each block with the true - * constant value (or are compilers smart enough to do that?) - * - rewrite all MMX interlacing code so it's aligned with - * the *beginning* of the row buffer, not the end. This - * would not only allow one to eliminate half of the memory - * writes for odd passes (that is, pass == odd), it may also - * eliminate some unaligned-data-access exceptions (assuming - * there's a penalty for not aligning 64-bit accesses on - * 64-bit boundaries). The only catch is that the "leftover" - * pixel(s) at the end of the row would have to be saved, - * but there are enough unused MMX registers in every case, - * so this is not a problem. A further benefit is that the - * post-MMX cleanup code (C code) in at least some of the - * cases could be done within the assembler block. - * x [DONE] the "v3 v2 v1 v0 v7 v6 v5 v4" comments are confusing, - * inconsistent, and don't match the MMX Programmer's Reference - * Manual conventions anyway. They should be changed to - * "b7 b6 b5 b4 b3 b2 b1 b0," where b0 indicates the byte that - * was lowest in memory (e.g., corresponding to a left pixel) - * and b7 is the byte that was highest (e.g., a right pixel). - * - * 19991016: - * - Brennan's Guide notwithstanding, gcc under Linux does *not* - * want globals prefixed by underscores when referencing them-- - * i.e., if the variable is const4, then refer to it as const4, - * not _const4. This seems to be a djgpp-specific requirement. - * Also, such variables apparently *must* be declared outside - * of functions; neither static nor automatic variables work if - * defined within the scope of a single function, but both - * static and truly global (multi-module) variables work fine. - * - * 19991023: - * - fixed png_combine_row() non-MMX replication bug (odd passes only?) - * - switched from string-concatenation-with-macros to cleaner method of - * renaming global variables for djgpp--i.e., always use prefixes in - * inlined assembler code (== strings) and conditionally rename the - * variables, not the other way around. Hence _const4, _mask8_0, etc. - * - * 19991024: - * - fixed mmxsupport()/png_do_interlace() first-row bug - * This one was severely weird: even though mmxsupport() doesn't touch - * ebx (where "row" pointer was stored), it nevertheless managed to zero - * the register (even in static/non-fPIC code--see below), which in turn - * caused png_do_interlace() to return prematurely on the first row of - * interlaced images (i.e., without expanding the interlaced pixels). - * Inspection of the generated assembly code didn't turn up any clues, - * although it did point at a minor optimization (i.e., get rid of - * mmx_supported_local variable and just use eax). Possibly the CPUID - * instruction is more destructive than it looks? (Not yet checked.) - * - "info gcc" was next to useless, so compared fPIC and non-fPIC assembly - * listings... Apparently register spillage has to do with ebx, since - * it's used to index the global offset table. Commenting it out of the - * input-reg lists in png_combine_row() eliminated compiler barfage, so - * ifdef'd with __PIC__ macro: if defined, use a global for unmask - * - * 19991107: - * - verified CPUID clobberage: 12-char string constant ("GenuineIntel", - * "AuthenticAMD", etc.) placed in ebx:ecx:edx. Still need to polish. - * - * 19991120: - * - made "diff" variable (now "_dif") global to simplify conversion of - * filtering routines (running out of regs, sigh). "diff" is still used - * in interlacing routines, however. - * - fixed up both versions of mmxsupport() (ORIG_THAT_USED_TO_CLOBBER_EBX - * macro determines which is used); original not yet tested. - * - * 20000213: - * - when compiling with gcc, be sure to use -fomit-frame-pointer - * - * 20000319: - * - fixed a register-name typo in png_do_read_interlace(), default (MMX) case, - * pass == 4 or 5, that caused visible corruption of interlaced images - * - * 20000623: - * - Various problems were reported with gcc 2.95.2 in the Cygwin environment, - * many of the form "forbidden register 0 (ax) was spilled for class AREG." - * This is explained at http://gcc.gnu.org/fom_serv/cache/23.html, and - * Chuck Wilson supplied a patch involving dummy output registers. See - * http://sourceforge.net/bugs/?func=detailbug&bug_id=108741&group_id=5624 - * for the original (anonymous) SourceForge bug report. - * - * 20000706: - * - Chuck Wilson passed along these remaining gcc 2.95.2 errors: - * pnggccrd.c: In function `png_combine_row': - * pnggccrd.c:525: more than 10 operands in `asm' - * pnggccrd.c:669: more than 10 operands in `asm' - * pnggccrd.c:828: more than 10 operands in `asm' - * pnggccrd.c:994: more than 10 operands in `asm' - * pnggccrd.c:1177: more than 10 operands in `asm' - * They are all the same problem and can be worked around by using the - * global _unmask variable unconditionally, not just in the -fPIC case. - * Reportedly earlier versions of gcc also have the problem with more than - * 10 operands; they just don't report it. Much strangeness ensues, etc. - * - * 20000729: - * - enabled png_read_filter_row_mmx_up() (shortest remaining unconverted - * MMX routine); began converting png_read_filter_row_mmx_sub() - * - to finish remaining sections: - * - clean up indentation and comments - * - preload local variables - * - add output and input regs (order of former determines numerical - * mapping of latter) - * - avoid all usage of ebx (including bx, bh, bl) register [20000823] - * - remove "$" from addressing of Shift and Mask variables [20000823] - * - * 20000731: - * - global union vars causing segfaults in png_read_filter_row_mmx_sub()? - * - * 20000822: - * - ARGH, stupid png_read_filter_row_mmx_sub() segfault only happens with - * shared-library (-fPIC) version! Code works just fine as part of static - * library. Damn damn damn damn damn, should have tested that sooner. - * ebx is getting clobbered again (explicitly this time); need to save it - * on stack or rewrite asm code to avoid using it altogether. Blargh! - * - * 20000823: - * - first section was trickiest; all remaining sections have ebx -> edx now. - * (-fPIC works again.) Also added missing underscores to various Shift* - * and *Mask* globals and got rid of leading "$" signs. - * - * 20000826: - * - added visual separators to help navigate microscopic printed copies - * (http://pobox.com/~newt/code/gpr-latest.zip, mode 10); started working - * on png_read_filter_row_mmx_avg() - * - * 20000828: - * - finished png_read_filter_row_mmx_avg(): only Paeth left! (930 lines...) - * What the hell, did png_read_filter_row_mmx_paeth(), too. Comments not - * cleaned up/shortened in either routine, but functionality is complete - * and seems to be working fine. - * - * 20000829: - * - ahhh, figured out last(?) bit of gcc/gas asm-fu: if register is listed - * as an input reg (with dummy output variables, etc.), then it *cannot* - * also appear in the clobber list or gcc 2.95.2 will barf. The solution - * is simple enough... - * - * 20000914: - * - bug in png_read_filter_row_mmx_avg(): 16-bit grayscale not handled - * correctly (but 48-bit RGB just fine) - * - * 20000916: - * - fixed bug in png_read_filter_row_mmx_avg(), bpp == 2 case; three errors: - * - "_ShiftBpp.use = 24;" should have been "_ShiftBpp.use = 16;" - * - "_ShiftRem.use = 40;" should have been "_ShiftRem.use = 48;" - * - "psllq _ShiftRem, %%mm2" should have been "psrlq _ShiftRem, %%mm2" - * - * 20010103: - * - renamed mmxsupport() to png_mmx_support(), with auto-set of mmx_supported, - * and made it public - * - * 20010104: - * - removed dependency on png_read_filter_row_c() (C code already duplicated - * within MMX version of png_read_filter_row()) so no longer necessary to - * compile it into pngrutil.o - * - * STILL TO DO: - * - test png_do_read_interlace() 64-bit case (pixel_bytes == 8) - * - write MMX code for 48-bit case (pixel_bytes == 6) - * - figure out what's up with 24-bit case (pixel_bytes == 3): - * why subtract 8 from width_mmx in the pass 4/5 case? - * (only width_mmx case) (near line 1606) - * - rewrite all MMX interlacing code so it's aligned with beginning - * of the row buffer, not the end (see 19991007 for details) - * x pick one version of mmxsupport() and get rid of the other - * - add error messages to any remaining bogus default cases - * - enable pixel_depth == 8 cases in png_read_filter_row()? (test speed) - * - add support for runtime enable/disable/query of various MMX routines - */ - -//#define PNG_DEBUG 2 // GRR - -#define PNG_INTERNAL -#include "png.h" - -#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGGCCRD) - -#ifdef PNG_USE_LOCAL_ARRAYS -static const int FARDATA png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; -static const int FARDATA png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; -static const int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1}; -#endif - -// djgpp, Win32, and Cygwin add their own underscores to global variables, -// so define them without: -#if defined(__DJGPP__) || defined(WIN32) || defined(__CYGWIN__) -# define _mmx_supported mmx_supported -# define _unmask unmask -# define _const4 const4 -# define _const6 const6 -# define _mask8_0 mask8_0 -# define _mask16_1 mask16_1 -# define _mask16_0 mask16_0 -# define _mask24_2 mask24_2 -# define _mask24_1 mask24_1 -# define _mask24_0 mask24_0 -# define _mask32_3 mask32_3 -# define _mask32_2 mask32_2 -# define _mask32_1 mask32_1 -# define _mask32_0 mask32_0 -# define _mask48_5 mask48_5 -# define _mask48_4 mask48_4 -# define _mask48_3 mask48_3 -# define _mask48_2 mask48_2 -# define _mask48_1 mask48_1 -# define _mask48_0 mask48_0 -# define _FullLength FullLength -# define _MMXLength MMXLength -# define _dif dif -# define _LBCarryMask LBCarryMask -# define _HBClearMask HBClearMask -# define _ActiveMask ActiveMask -# define _ActiveMask2 ActiveMask2 -# define _ActiveMaskEnd ActiveMaskEnd -# define _ShiftBpp ShiftBpp -# define _ShiftRem ShiftRem -# define _patemp patemp -# define _pbtemp pbtemp -# define _pctemp pctemp -#endif - -static int _mmx_supported = 2; - -/* These constants are used in the inlined MMX assembly code. - Ignore gcc's "At top level: defined but not used" warnings. */ - -/* GRR 20000706: originally _unmask was needed only when compiling with -fPIC, - * since that case uses the %ebx register for indexing the Global Offset Table - * and there were no other registers available. But gcc 2.95 and later emit - * "more than 10 operands in `asm'" errors when %ebx is used to preload unmask - * in the non-PIC case, so we'll just use the global unconditionally now. - */ -static int _unmask; - -static unsigned long long _mask8_0 = 0x0102040810204080LL; - -static unsigned long long _mask16_1 = 0x0101020204040808LL; -static unsigned long long _mask16_0 = 0x1010202040408080LL; - -static unsigned long long _mask24_2 = 0x0101010202020404LL; -static unsigned long long _mask24_1 = 0x0408080810101020LL; -static unsigned long long _mask24_0 = 0x2020404040808080LL; - -static unsigned long long _mask32_3 = 0x0101010102020202LL; -static unsigned long long _mask32_2 = 0x0404040408080808LL; -static unsigned long long _mask32_1 = 0x1010101020202020LL; -static unsigned long long _mask32_0 = 0x4040404080808080LL; - -static unsigned long long _mask48_5 = 0x0101010101010202LL; -static unsigned long long _mask48_4 = 0x0202020204040404LL; -static unsigned long long _mask48_3 = 0x0404080808080808LL; -static unsigned long long _mask48_2 = 0x1010101010102020LL; -static unsigned long long _mask48_1 = 0x2020202040404040LL; -static unsigned long long _mask48_0 = 0x4040808080808080LL; - -static unsigned long long _const4 = 0x0000000000FFFFFFLL; -//static unsigned long long _const5 = 0x000000FFFFFF0000LL; // NOT USED -static unsigned long long _const6 = 0x00000000000000FFLL; - -// These are used in the row-filter routines and should/would be local -// variables if not for gcc addressing limitations. - -static png_uint_32 _FullLength; -static png_uint_32 _MMXLength; -static int _dif; -static int _patemp; // temp variables for Paeth routine -static int _pbtemp; -static int _pctemp; - - - - -//===========================================================================// -// // -// P N G _ C O M B I N E _ R O W // -// // -//===========================================================================// - -#if defined(PNG_HAVE_ASSEMBLER_COMBINE_ROW) - -/* Combines the row recently read in with the previous row. - This routine takes care of alpha and transparency if requested. - This routine also handles the two methods of progressive display - of interlaced images, depending on the mask value. - The mask value describes which pixels are to be combined with - the row. The pattern always repeats every 8 pixels, so just 8 - bits are needed. A one indicates the pixel is to be combined; a - zero indicates the pixel is to be skipped. This is in addition - to any alpha or transparency value associated with the pixel. - If you want all pixels to be combined, pass 0xff (255) in mask. */ - -/* Use this routine for the x86 platform - it uses a faster MMX routine - if the machine supports MMX. */ - -void /* PRIVATE */ -png_combine_row(png_structp png_ptr, png_bytep row, int mask) -{ - png_debug(1,"in png_combine_row_asm\n"); - - if (_mmx_supported == 2) { - png_mmx_support(); - } - - if (mask == 0xff) - { - png_memcpy(row, png_ptr->row_buf + 1, - (png_size_t)((png_ptr->width * png_ptr->row_info.pixel_depth + 7) >> 3)); - } - /* GRR: png_combine_row() never called with mask == 0 */ - else - { - switch (png_ptr->row_info.pixel_depth) - { - case 1: // png_ptr->row_info.pixel_depth - { - png_bytep sp; - png_bytep dp; - int s_inc, s_start, s_end; - int m; - int shift; - png_uint_32 i; - - sp = png_ptr->row_buf + 1; - dp = row; - m = 0x80; -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 7; - s_inc = 1; - } - else -#endif - { - s_start = 7; - s_end = 0; - s_inc = -1; - } - - shift = s_start; - - for (i = 0; i < png_ptr->width; i++) - { - if (m & mask) - { - int value; - - value = (*sp >> shift) & 0x1; - *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - - case 2: // png_ptr->row_info.pixel_depth - { - png_bytep sp; - png_bytep dp; - int s_start, s_end, s_inc; - int m; - int shift; - png_uint_32 i; - int value; - - sp = png_ptr->row_buf + 1; - dp = row; - m = 0x80; -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 6; - s_inc = 2; - } - else -#endif - { - s_start = 6; - s_end = 0; - s_inc = -2; - } - - shift = s_start; - - for (i = 0; i < png_ptr->width; i++) - { - if (m & mask) - { - value = (*sp >> shift) & 0x3; - *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - - case 4: // png_ptr->row_info.pixel_depth - { - png_bytep sp; - png_bytep dp; - int s_start, s_end, s_inc; - int m; - int shift; - png_uint_32 i; - int value; - - sp = png_ptr->row_buf + 1; - dp = row; - m = 0x80; -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 4; - s_inc = 4; - } - else -#endif - { - s_start = 4; - s_end = 0; - s_inc = -4; - } - shift = s_start; - - for (i = 0; i < png_ptr->width; i++) - { - if (m & mask) - { - value = (*sp >> shift) & 0xf; - *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - - case 8: // png_ptr->row_info.pixel_depth - { - png_bytep srcptr; - png_bytep dstptr; - - if ( _mmx_supported ) - { - png_uint_32 len; - int diff; - int dummy_value_a; // fix 'forbidden register spilled' error - int dummy_value_d; - int dummy_value_c; - int dummy_value_S; - int dummy_value_D; - _unmask = ~mask; // global variable for -fPIC version - srcptr = png_ptr->row_buf + 1; - dstptr = row; - len = png_ptr->width &~7; // reduce to multiple of 8 - diff = png_ptr->width & 7; // amount lost - - __asm__ __volatile__ ( - "movd _unmask, %%mm7 \n\t" // load bit pattern - "psubb %%mm6, %%mm6 \n\t" // zero mm6 - "punpcklbw %%mm7, %%mm7 \n\t" - "punpcklwd %%mm7, %%mm7 \n\t" - "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks - - "movq _mask8_0, %%mm0 \n\t" - "pand %%mm7, %%mm0 \n\t" // nonzero if keep byte - "pcmpeqb %%mm6, %%mm0 \n\t" // zeros->1s, v versa - -// preload "movl len, %%ecx \n\t" // load length of line -// preload "movl srcptr, %%esi \n\t" // load source -// preload "movl dstptr, %%edi \n\t" // load dest - - "cmpl $0, %%ecx \n\t" // len == 0 ? - "je mainloop8end \n\t" - - "mainloop8: \n\t" - "movq (%%esi), %%mm4 \n\t" // *srcptr - "pand %%mm0, %%mm4 \n\t" - "movq %%mm0, %%mm6 \n\t" - "pandn (%%edi), %%mm6 \n\t" // *dstptr - "por %%mm6, %%mm4 \n\t" - "movq %%mm4, (%%edi) \n\t" - "addl $8, %%esi \n\t" // inc by 8 bytes processed - "addl $8, %%edi \n\t" - "subl $8, %%ecx \n\t" // dec by 8 pixels processed - "ja mainloop8 \n\t" - - "mainloop8end: \n\t" -// preload "movl diff, %%ecx \n\t" // (diff is in eax) - "movl %%eax, %%ecx \n\t" - "cmpl $0, %%ecx \n\t" - "jz end8 \n\t" -// preload "movl mask, %%edx \n\t" - "sall $24, %%edx \n\t" // make low byte, high byte - - "secondloop8: \n\t" - "sall %%edx \n\t" // move high bit to CF - "jnc skip8 \n\t" // if CF = 0 - "movb (%%esi), %%al \n\t" - "movb %%al, (%%edi) \n\t" - - "skip8: \n\t" - "incl %%esi \n\t" - "incl %%edi \n\t" - "decl %%ecx \n\t" - "jnz secondloop8 \n\t" - - "end8: \n\t" - "EMMS \n\t" // DONE - - : "=a" (dummy_value_a), // output regs (dummy) - "=d" (dummy_value_d), - "=c" (dummy_value_c), - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "3" (srcptr), // esi // input regs - "4" (dstptr), // edi - "0" (diff), // eax -// was (unmask) "b" RESERVED // ebx // Global Offset Table idx - "2" (len), // ecx - "1" (mask) // edx - -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm4", "%mm6", "%mm7" // clobber list -#endif - ); - } - else /* mmx _not supported - Use modified C routine */ - { - register png_uint_32 i; - png_uint_32 initial_val = png_pass_start[png_ptr->pass]; - // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; - register int stride = png_pass_inc[png_ptr->pass]; - // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - register int rep_bytes = png_pass_width[png_ptr->pass]; - // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; - register png_uint_32 final_val = png_ptr->width; - - srcptr = png_ptr->row_buf + 1 + initial_val; - dstptr = row + initial_val; - - for (i = initial_val; i < final_val; i += stride) - { - png_memcpy(dstptr, srcptr, rep_bytes); - srcptr += stride; - dstptr += stride; - } - } /* end of else */ - - break; - } // end 8 bpp - - case 16: // png_ptr->row_info.pixel_depth - { - png_bytep srcptr; - png_bytep dstptr; - - if ( _mmx_supported ) - { - png_uint_32 len; - int diff; - int dummy_value_a; // fix 'forbidden register spilled' error - int dummy_value_d; - int dummy_value_c; - int dummy_value_S; - int dummy_value_D; - _unmask = ~mask; // global variable for -fPIC version - srcptr = png_ptr->row_buf + 1; - dstptr = row; - len = png_ptr->width &~7; // reduce to multiple of 8 - diff = png_ptr->width & 7; // amount lost - - __asm__ __volatile__ ( - "movd _unmask, %%mm7 \n\t" // load bit pattern - "psubb %%mm6, %%mm6 \n\t" // zero mm6 - "punpcklbw %%mm7, %%mm7 \n\t" - "punpcklwd %%mm7, %%mm7 \n\t" - "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks - - "movq _mask16_0, %%mm0 \n\t" - "movq _mask16_1, %%mm1 \n\t" - - "pand %%mm7, %%mm0 \n\t" - "pand %%mm7, %%mm1 \n\t" - - "pcmpeqb %%mm6, %%mm0 \n\t" - "pcmpeqb %%mm6, %%mm1 \n\t" - -// preload "movl len, %%ecx \n\t" // load length of line -// preload "movl srcptr, %%esi \n\t" // load source -// preload "movl dstptr, %%edi \n\t" // load dest - - "cmpl $0, %%ecx \n\t" - "jz mainloop16end \n\t" - - "mainloop16: \n\t" - "movq (%%esi), %%mm4 \n\t" - "pand %%mm0, %%mm4 \n\t" - "movq %%mm0, %%mm6 \n\t" - "movq (%%edi), %%mm7 \n\t" - "pandn %%mm7, %%mm6 \n\t" - "por %%mm6, %%mm4 \n\t" - "movq %%mm4, (%%edi) \n\t" - - "movq 8(%%esi), %%mm5 \n\t" - "pand %%mm1, %%mm5 \n\t" - "movq %%mm1, %%mm7 \n\t" - "movq 8(%%edi), %%mm6 \n\t" - "pandn %%mm6, %%mm7 \n\t" - "por %%mm7, %%mm5 \n\t" - "movq %%mm5, 8(%%edi) \n\t" - - "addl $16, %%esi \n\t" // inc by 16 bytes processed - "addl $16, %%edi \n\t" - "subl $8, %%ecx \n\t" // dec by 8 pixels processed - "ja mainloop16 \n\t" - - "mainloop16end: \n\t" -// preload "movl diff, %%ecx \n\t" // (diff is in eax) - "movl %%eax, %%ecx \n\t" - "cmpl $0, %%ecx \n\t" - "jz end16 \n\t" -// preload "movl mask, %%edx \n\t" - "sall $24, %%edx \n\t" // make low byte, high byte - - "secondloop16: \n\t" - "sall %%edx \n\t" // move high bit to CF - "jnc skip16 \n\t" // if CF = 0 - "movw (%%esi), %%ax \n\t" - "movw %%ax, (%%edi) \n\t" - - "skip16: \n\t" - "addl $2, %%esi \n\t" - "addl $2, %%edi \n\t" - "decl %%ecx \n\t" - "jnz secondloop16 \n\t" - - "end16: \n\t" - "EMMS \n\t" // DONE - - : "=a" (dummy_value_a), // output regs (dummy) - "=c" (dummy_value_c), - "=d" (dummy_value_d), - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "0" (diff), // eax // input regs -// was (unmask) " " RESERVED // ebx // Global Offset Table idx - "1" (len), // ecx - "2" (mask), // edx - "3" (srcptr), // esi - "4" (dstptr) // edi - -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1", "%mm4" // clobber list - , "%mm5", "%mm6", "%mm7" -#endif - ); - } - else /* mmx _not supported - Use modified C routine */ - { - register png_uint_32 i; - png_uint_32 initial_val = 2 * png_pass_start[png_ptr->pass]; - // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; - register int stride = 2 * png_pass_inc[png_ptr->pass]; - // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - register int rep_bytes = 2 * png_pass_width[png_ptr->pass]; - // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; - register png_uint_32 final_val = 2 * png_ptr->width; - - srcptr = png_ptr->row_buf + 1 + initial_val; - dstptr = row + initial_val; - - for (i = initial_val; i < final_val; i += stride) - { - png_memcpy(dstptr, srcptr, rep_bytes); - srcptr += stride; - dstptr += stride; - } - } /* end of else */ - - break; - } // end 16 bpp - - case 24: // png_ptr->row_info.pixel_depth - { - png_bytep srcptr; - png_bytep dstptr; - - if ( _mmx_supported ) - { - png_uint_32 len; - int diff; - int dummy_value_a; // fix 'forbidden register spilled' error - int dummy_value_d; - int dummy_value_c; - int dummy_value_S; - int dummy_value_D; - _unmask = ~mask; // global variable for -fPIC version - srcptr = png_ptr->row_buf + 1; - dstptr = row; - len = png_ptr->width &~7; // reduce to multiple of 8 - diff = png_ptr->width & 7; // amount lost - - __asm__ __volatile__ ( - "movd _unmask, %%mm7 \n\t" // load bit pattern - "psubb %%mm6, %%mm6 \n\t" // zero mm6 - "punpcklbw %%mm7, %%mm7 \n\t" - "punpcklwd %%mm7, %%mm7 \n\t" - "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks - - "movq _mask24_0, %%mm0 \n\t" - "movq _mask24_1, %%mm1 \n\t" - "movq _mask24_2, %%mm2 \n\t" - - "pand %%mm7, %%mm0 \n\t" - "pand %%mm7, %%mm1 \n\t" - "pand %%mm7, %%mm2 \n\t" - - "pcmpeqb %%mm6, %%mm0 \n\t" - "pcmpeqb %%mm6, %%mm1 \n\t" - "pcmpeqb %%mm6, %%mm2 \n\t" - -// preload "movl len, %%ecx \n\t" // load length of line -// preload "movl srcptr, %%esi \n\t" // load source -// preload "movl dstptr, %%edi \n\t" // load dest - - "cmpl $0, %%ecx \n\t" - "jz mainloop24end \n\t" - - "mainloop24: \n\t" - "movq (%%esi), %%mm4 \n\t" - "pand %%mm0, %%mm4 \n\t" - "movq %%mm0, %%mm6 \n\t" - "movq (%%edi), %%mm7 \n\t" - "pandn %%mm7, %%mm6 \n\t" - "por %%mm6, %%mm4 \n\t" - "movq %%mm4, (%%edi) \n\t" - - "movq 8(%%esi), %%mm5 \n\t" - "pand %%mm1, %%mm5 \n\t" - "movq %%mm1, %%mm7 \n\t" - "movq 8(%%edi), %%mm6 \n\t" - "pandn %%mm6, %%mm7 \n\t" - "por %%mm7, %%mm5 \n\t" - "movq %%mm5, 8(%%edi) \n\t" - - "movq 16(%%esi), %%mm6 \n\t" - "pand %%mm2, %%mm6 \n\t" - "movq %%mm2, %%mm4 \n\t" - "movq 16(%%edi), %%mm7 \n\t" - "pandn %%mm7, %%mm4 \n\t" - "por %%mm4, %%mm6 \n\t" - "movq %%mm6, 16(%%edi) \n\t" - - "addl $24, %%esi \n\t" // inc by 24 bytes processed - "addl $24, %%edi \n\t" - "subl $8, %%ecx \n\t" // dec by 8 pixels processed - - "ja mainloop24 \n\t" - - "mainloop24end: \n\t" -// preload "movl diff, %%ecx \n\t" // (diff is in eax) - "movl %%eax, %%ecx \n\t" - "cmpl $0, %%ecx \n\t" - "jz end24 \n\t" -// preload "movl mask, %%edx \n\t" - "sall $24, %%edx \n\t" // make low byte, high byte - - "secondloop24: \n\t" - "sall %%edx \n\t" // move high bit to CF - "jnc skip24 \n\t" // if CF = 0 - "movw (%%esi), %%ax \n\t" - "movw %%ax, (%%edi) \n\t" - "xorl %%eax, %%eax \n\t" - "movb 2(%%esi), %%al \n\t" - "movb %%al, 2(%%edi) \n\t" - - "skip24: \n\t" - "addl $3, %%esi \n\t" - "addl $3, %%edi \n\t" - "decl %%ecx \n\t" - "jnz secondloop24 \n\t" - - "end24: \n\t" - "EMMS \n\t" // DONE - - : "=a" (dummy_value_a), // output regs (dummy) - "=d" (dummy_value_d), - "=c" (dummy_value_c), - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "3" (srcptr), // esi // input regs - "4" (dstptr), // edi - "0" (diff), // eax -// was (unmask) "b" RESERVED // ebx // Global Offset Table idx - "2" (len), // ecx - "1" (mask) // edx - -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1", "%mm2" // clobber list - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - else /* mmx _not supported - Use modified C routine */ - { - register png_uint_32 i; - png_uint_32 initial_val = 3 * png_pass_start[png_ptr->pass]; - // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; - register int stride = 3 * png_pass_inc[png_ptr->pass]; - // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - register int rep_bytes = 3 * png_pass_width[png_ptr->pass]; - // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; - register png_uint_32 final_val = 3 * png_ptr->width; - - srcptr = png_ptr->row_buf + 1 + initial_val; - dstptr = row + initial_val; - - for (i = initial_val; i < final_val; i += stride) - { - png_memcpy(dstptr, srcptr, rep_bytes); - srcptr += stride; - dstptr += stride; - } - } /* end of else */ - - break; - } // end 24 bpp - - case 32: // png_ptr->row_info.pixel_depth - { - png_bytep srcptr; - png_bytep dstptr; - - if ( _mmx_supported ) - { - png_uint_32 len; - int diff; - int dummy_value_a; // fix 'forbidden register spilled' error - int dummy_value_d; - int dummy_value_c; - int dummy_value_S; - int dummy_value_D; - _unmask = ~mask; // global variable for -fPIC version - srcptr = png_ptr->row_buf + 1; - dstptr = row; - len = png_ptr->width &~7; // reduce to multiple of 8 - diff = png_ptr->width & 7; // amount lost - - __asm__ __volatile__ ( - "movd _unmask, %%mm7 \n\t" // load bit pattern - "psubb %%mm6, %%mm6 \n\t" // zero mm6 - "punpcklbw %%mm7, %%mm7 \n\t" - "punpcklwd %%mm7, %%mm7 \n\t" - "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks - - "movq _mask32_0, %%mm0 \n\t" - "movq _mask32_1, %%mm1 \n\t" - "movq _mask32_2, %%mm2 \n\t" - "movq _mask32_3, %%mm3 \n\t" - - "pand %%mm7, %%mm0 \n\t" - "pand %%mm7, %%mm1 \n\t" - "pand %%mm7, %%mm2 \n\t" - "pand %%mm7, %%mm3 \n\t" - - "pcmpeqb %%mm6, %%mm0 \n\t" - "pcmpeqb %%mm6, %%mm1 \n\t" - "pcmpeqb %%mm6, %%mm2 \n\t" - "pcmpeqb %%mm6, %%mm3 \n\t" - -// preload "movl len, %%ecx \n\t" // load length of line -// preload "movl srcptr, %%esi \n\t" // load source -// preload "movl dstptr, %%edi \n\t" // load dest - - "cmpl $0, %%ecx \n\t" // lcr - "jz mainloop32end \n\t" - - "mainloop32: \n\t" - "movq (%%esi), %%mm4 \n\t" - "pand %%mm0, %%mm4 \n\t" - "movq %%mm0, %%mm6 \n\t" - "movq (%%edi), %%mm7 \n\t" - "pandn %%mm7, %%mm6 \n\t" - "por %%mm6, %%mm4 \n\t" - "movq %%mm4, (%%edi) \n\t" - - "movq 8(%%esi), %%mm5 \n\t" - "pand %%mm1, %%mm5 \n\t" - "movq %%mm1, %%mm7 \n\t" - "movq 8(%%edi), %%mm6 \n\t" - "pandn %%mm6, %%mm7 \n\t" - "por %%mm7, %%mm5 \n\t" - "movq %%mm5, 8(%%edi) \n\t" - - "movq 16(%%esi), %%mm6 \n\t" - "pand %%mm2, %%mm6 \n\t" - "movq %%mm2, %%mm4 \n\t" - "movq 16(%%edi), %%mm7 \n\t" - "pandn %%mm7, %%mm4 \n\t" - "por %%mm4, %%mm6 \n\t" - "movq %%mm6, 16(%%edi) \n\t" - - "movq 24(%%esi), %%mm7 \n\t" - "pand %%mm3, %%mm7 \n\t" - "movq %%mm3, %%mm5 \n\t" - "movq 24(%%edi), %%mm4 \n\t" - "pandn %%mm4, %%mm5 \n\t" - "por %%mm5, %%mm7 \n\t" - "movq %%mm7, 24(%%edi) \n\t" - - "addl $32, %%esi \n\t" // inc by 32 bytes processed - "addl $32, %%edi \n\t" - "subl $8, %%ecx \n\t" // dec by 8 pixels processed - "ja mainloop32 \n\t" - - "mainloop32end: \n\t" -// preload "movl diff, %%ecx \n\t" // (diff is in eax) - "movl %%eax, %%ecx \n\t" - "cmpl $0, %%ecx \n\t" - "jz end32 \n\t" -// preload "movl mask, %%edx \n\t" - "sall $24, %%edx \n\t" // low byte => high byte - - "secondloop32: \n\t" - "sall %%edx \n\t" // move high bit to CF - "jnc skip32 \n\t" // if CF = 0 - "movl (%%esi), %%eax \n\t" - "movl %%eax, (%%edi) \n\t" - - "skip32: \n\t" - "addl $4, %%esi \n\t" - "addl $4, %%edi \n\t" - "decl %%ecx \n\t" - "jnz secondloop32 \n\t" - - "end32: \n\t" - "EMMS \n\t" // DONE - - : "=a" (dummy_value_a), // output regs (dummy) - "=d" (dummy_value_d), - "=c" (dummy_value_c), - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "3" (srcptr), // esi // input regs - "4" (dstptr), // edi - "0" (diff), // eax -// was (unmask) "b" RESERVED // ebx // Global Offset Table idx - "2" (len), // ecx - "1" (mask) // edx - -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1", "%mm2", "%mm3" // clobber list - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - else /* mmx _not supported - Use modified C routine */ - { - register png_uint_32 i; - png_uint_32 initial_val = 4 * png_pass_start[png_ptr->pass]; - // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; - register int stride = 4 * png_pass_inc[png_ptr->pass]; - // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - register int rep_bytes = 4 * png_pass_width[png_ptr->pass]; - // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; - register png_uint_32 final_val = 4 * png_ptr->width; - - srcptr = png_ptr->row_buf + 1 + initial_val; - dstptr = row + initial_val; - - for (i = initial_val; i < final_val; i += stride) - { - png_memcpy(dstptr, srcptr, rep_bytes); - srcptr += stride; - dstptr += stride; - } - } /* end of else */ - - break; - } // end 32 bpp - - case 48: // png_ptr->row_info.pixel_depth - { - png_bytep srcptr; - png_bytep dstptr; - - if ( _mmx_supported ) - { - png_uint_32 len; - int diff; - int dummy_value_a; // fix 'forbidden register spilled' error - int dummy_value_d; - int dummy_value_c; - int dummy_value_S; - int dummy_value_D; - _unmask = ~mask; // global variable for -fPIC version - srcptr = png_ptr->row_buf + 1; - dstptr = row; - len = png_ptr->width &~7; // reduce to multiple of 8 - diff = png_ptr->width & 7; // amount lost - - __asm__ __volatile__ ( - "movd _unmask, %%mm7 \n\t" // load bit pattern - "psubb %%mm6, %%mm6 \n\t" // zero mm6 - "punpcklbw %%mm7, %%mm7 \n\t" - "punpcklwd %%mm7, %%mm7 \n\t" - "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks - - "movq _mask48_0, %%mm0 \n\t" - "movq _mask48_1, %%mm1 \n\t" - "movq _mask48_2, %%mm2 \n\t" - "movq _mask48_3, %%mm3 \n\t" - "movq _mask48_4, %%mm4 \n\t" - "movq _mask48_5, %%mm5 \n\t" - - "pand %%mm7, %%mm0 \n\t" - "pand %%mm7, %%mm1 \n\t" - "pand %%mm7, %%mm2 \n\t" - "pand %%mm7, %%mm3 \n\t" - "pand %%mm7, %%mm4 \n\t" - "pand %%mm7, %%mm5 \n\t" - - "pcmpeqb %%mm6, %%mm0 \n\t" - "pcmpeqb %%mm6, %%mm1 \n\t" - "pcmpeqb %%mm6, %%mm2 \n\t" - "pcmpeqb %%mm6, %%mm3 \n\t" - "pcmpeqb %%mm6, %%mm4 \n\t" - "pcmpeqb %%mm6, %%mm5 \n\t" - -// preload "movl len, %%ecx \n\t" // load length of line -// preload "movl srcptr, %%esi \n\t" // load source -// preload "movl dstptr, %%edi \n\t" // load dest - - "cmpl $0, %%ecx \n\t" - "jz mainloop48end \n\t" - - "mainloop48: \n\t" - "movq (%%esi), %%mm7 \n\t" - "pand %%mm0, %%mm7 \n\t" - "movq %%mm0, %%mm6 \n\t" - "pandn (%%edi), %%mm6 \n\t" - "por %%mm6, %%mm7 \n\t" - "movq %%mm7, (%%edi) \n\t" - - "movq 8(%%esi), %%mm6 \n\t" - "pand %%mm1, %%mm6 \n\t" - "movq %%mm1, %%mm7 \n\t" - "pandn 8(%%edi), %%mm7 \n\t" - "por %%mm7, %%mm6 \n\t" - "movq %%mm6, 8(%%edi) \n\t" - - "movq 16(%%esi), %%mm6 \n\t" - "pand %%mm2, %%mm6 \n\t" - "movq %%mm2, %%mm7 \n\t" - "pandn 16(%%edi), %%mm7 \n\t" - "por %%mm7, %%mm6 \n\t" - "movq %%mm6, 16(%%edi) \n\t" - - "movq 24(%%esi), %%mm7 \n\t" - "pand %%mm3, %%mm7 \n\t" - "movq %%mm3, %%mm6 \n\t" - "pandn 24(%%edi), %%mm6 \n\t" - "por %%mm6, %%mm7 \n\t" - "movq %%mm7, 24(%%edi) \n\t" - - "movq 32(%%esi), %%mm6 \n\t" - "pand %%mm4, %%mm6 \n\t" - "movq %%mm4, %%mm7 \n\t" - "pandn 32(%%edi), %%mm7 \n\t" - "por %%mm7, %%mm6 \n\t" - "movq %%mm6, 32(%%edi) \n\t" - - "movq 40(%%esi), %%mm7 \n\t" - "pand %%mm5, %%mm7 \n\t" - "movq %%mm5, %%mm6 \n\t" - "pandn 40(%%edi), %%mm6 \n\t" - "por %%mm6, %%mm7 \n\t" - "movq %%mm7, 40(%%edi) \n\t" - - "addl $48, %%esi \n\t" // inc by 48 bytes processed - "addl $48, %%edi \n\t" - "subl $8, %%ecx \n\t" // dec by 8 pixels processed - - "ja mainloop48 \n\t" - - "mainloop48end: \n\t" -// preload "movl diff, %%ecx \n\t" // (diff is in eax) - "movl %%eax, %%ecx \n\t" - "cmpl $0, %%ecx \n\t" - "jz end48 \n\t" -// preload "movl mask, %%edx \n\t" - "sall $24, %%edx \n\t" // make low byte, high byte - - "secondloop48: \n\t" - "sall %%edx \n\t" // move high bit to CF - "jnc skip48 \n\t" // if CF = 0 - "movl (%%esi), %%eax \n\t" - "movl %%eax, (%%edi) \n\t" - - "skip48: \n\t" - "addl $4, %%esi \n\t" - "addl $4, %%edi \n\t" - "decl %%ecx \n\t" - "jnz secondloop48 \n\t" - - "end48: \n\t" - "EMMS \n\t" // DONE - - : "=a" (dummy_value_a), // output regs (dummy) - "=d" (dummy_value_d), - "=c" (dummy_value_c), - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "3" (srcptr), // esi // input regs - "4" (dstptr), // edi - "0" (diff), // eax -// was (unmask) "b" RESERVED // ebx // Global Offset Table idx - "2" (len), // ecx - "1" (mask) // edx - -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1", "%mm2", "%mm3" // clobber list - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - else /* mmx _not supported - Use modified C routine */ - { - register png_uint_32 i; - png_uint_32 initial_val = 6 * png_pass_start[png_ptr->pass]; - // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; - register int stride = 6 * png_pass_inc[png_ptr->pass]; - // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - register int rep_bytes = 6 * png_pass_width[png_ptr->pass]; - // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; - register png_uint_32 final_val = 6 * png_ptr->width; - - srcptr = png_ptr->row_buf + 1 + initial_val; - dstptr = row + initial_val; - - for (i = initial_val; i < final_val; i += stride) - { - png_memcpy(dstptr, srcptr, rep_bytes); - srcptr += stride; - dstptr += stride; - } - } /* end of else */ - - break; - } // end 48 bpp - - case 64: // png_ptr->row_info.pixel_depth - { - png_bytep srcptr; - png_bytep dstptr; - register png_uint_32 i; - png_uint_32 initial_val = 8 * png_pass_start[png_ptr->pass]; - // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; - register int stride = 8 * png_pass_inc[png_ptr->pass]; - // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - register int rep_bytes = 8 * png_pass_width[png_ptr->pass]; - // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; - register png_uint_32 final_val = 8 * png_ptr->width; - - srcptr = png_ptr->row_buf + 1 + initial_val; - dstptr = row + initial_val; - - for (i = initial_val; i < final_val; i += stride) - { - png_memcpy(dstptr, srcptr, rep_bytes); - srcptr += stride; - dstptr += stride; - } - break; - } // end 64 bpp - - default: // png_ptr->row_info.pixel_depth != 1,2,4,8,16,24,32,48,64 - { - // this should never happen - fprintf(stderr, - "libpng internal error: png_ptr->row_info.pixel_depth = %d\n", - png_ptr->row_info.pixel_depth); - fflush(stderr); - break; - } - } /* end switch (png_ptr->row_info.pixel_depth) */ - - } /* end if (non-trivial mask) */ - -} /* end png_combine_row() */ - -#endif /* PNG_HAVE_ASSEMBLER_COMBINE_ROW */ - - - - -//===========================================================================// -// // -// P N G _ D O _ R E A D _ I N T E R L A C E // -// // -//===========================================================================// - -#if defined(PNG_READ_INTERLACING_SUPPORTED) -#if defined(PNG_HAVE_ASSEMBLER_READ_INTERLACE) - -/* png_do_read_interlace() is called after any 16-bit to 8-bit conversion - * has taken place. [GRR: what other steps come before and/or after?] - */ - -void /* PRIVATE */ -png_do_read_interlace(png_structp png_ptr) -{ - png_row_infop row_info = &(png_ptr->row_info); - png_bytep row = png_ptr->row_buf + 1; - int pass = png_ptr->pass; - png_uint_32 transformations = png_ptr->transformations; - - png_debug(1,"in png_do_read_interlace\n"); - - if (_mmx_supported == 2) { - png_mmx_support(); - } - - if (row != NULL && row_info != NULL) - { - png_uint_32 final_width; - - final_width = row_info->width * png_pass_inc[pass]; - - switch (row_info->pixel_depth) - { - case 1: - { - png_bytep sp, dp; - int sshift, dshift; - int s_start, s_end, s_inc; - png_byte v; - png_uint_32 i; - int j; - - sp = row + (png_size_t)((row_info->width - 1) >> 3); - dp = row + (png_size_t)((final_width - 1) >> 3); -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (int)((row_info->width + 7) & 7); - dshift = (int)((final_width + 7) & 7); - s_start = 7; - s_end = 0; - s_inc = -1; - } - else -#endif - { - sshift = 7 - (int)((row_info->width + 7) & 7); - dshift = 7 - (int)((final_width + 7) & 7); - s_start = 0; - s_end = 7; - s_inc = 1; - } - - for (i = row_info->width; i; i--) - { - v = (png_byte)((*sp >> sshift) & 0x1); - for (j = 0; j < png_pass_inc[pass]; j++) - { - *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - - case 2: - { - png_bytep sp, dp; - int sshift, dshift; - int s_start, s_end, s_inc; - png_uint_32 i; - - sp = row + (png_size_t)((row_info->width - 1) >> 2); - dp = row + (png_size_t)((final_width - 1) >> 2); -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (png_size_t)(((row_info->width + 3) & 3) << 1); - dshift = (png_size_t)(((final_width + 3) & 3) << 1); - s_start = 6; - s_end = 0; - s_inc = -2; - } - else -#endif - { - sshift = (png_size_t)((3 - ((row_info->width + 3) & 3)) << 1); - dshift = (png_size_t)((3 - ((final_width + 3) & 3)) << 1); - s_start = 0; - s_end = 6; - s_inc = 2; - } - - for (i = row_info->width; i; i--) - { - png_byte v; - int j; - - v = (png_byte)((*sp >> sshift) & 0x3); - for (j = 0; j < png_pass_inc[pass]; j++) - { - *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - - case 4: - { - png_bytep sp, dp; - int sshift, dshift; - int s_start, s_end, s_inc; - png_uint_32 i; - - sp = row + (png_size_t)((row_info->width - 1) >> 1); - dp = row + (png_size_t)((final_width - 1) >> 1); -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (png_size_t)(((row_info->width + 1) & 1) << 2); - dshift = (png_size_t)(((final_width + 1) & 1) << 2); - s_start = 4; - s_end = 0; - s_inc = -4; - } - else -#endif - { - sshift = (png_size_t)((1 - ((row_info->width + 1) & 1)) << 2); - dshift = (png_size_t)((1 - ((final_width + 1) & 1)) << 2); - s_start = 0; - s_end = 4; - s_inc = 4; - } - - for (i = row_info->width; i; i--) - { - png_byte v; - int j; - - v = (png_byte)((*sp >> sshift) & 0xf); - for (j = 0; j < png_pass_inc[pass]; j++) - { - *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - - //==================================================================== - - default: // 8-bit or larger (this is where the routine is modified) - { -// static unsigned long long _const4 = 0x0000000000FFFFFFLL; no good -// static unsigned long long const4 = 0x0000000000FFFFFFLL; no good -// unsigned long long _const4 = 0x0000000000FFFFFFLL; no good -// unsigned long long const4 = 0x0000000000FFFFFFLL; no good - png_bytep sptr, dp; - png_uint_32 i; - png_size_t pixel_bytes; - int width = row_info->width; - - pixel_bytes = (row_info->pixel_depth >> 3); - - // point sptr at the last pixel in the pre-expanded row: - sptr = row + (width - 1) * pixel_bytes; - - // point dp at the last pixel position in the expanded row: - dp = row + (final_width - 1) * pixel_bytes; - - // New code by Nirav Chhatrapati - Intel Corporation - - if ( _mmx_supported ) - { - //-------------------------------------------------------------- - if (pixel_bytes == 3) - { - if (((pass == 0) || (pass == 1)) && width) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $21, %%edi \n\t" - // (png_pass_inc[pass] - 1)*pixel_bytes - - ".loop3_pass0: \n\t" - "movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0 - "pand _const4, %%mm0 \n\t" // z z z z z 2 1 0 - "movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0 - "psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z - "movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z - "psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z - "psrlq $8, %%mm1 \n\t" // z z z z z z 2 1 - "por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z - "por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1 - "movq %%mm0, %%mm3 \n\t" // 2 1 0 2 1 0 2 1 - "psllq $16, %%mm0 \n\t" // 0 2 1 0 2 1 z z - "movq %%mm3, %%mm4 \n\t" // 2 1 0 2 1 0 2 1 - "punpckhdq %%mm0, %%mm3 \n\t" // 0 2 1 0 2 1 0 2 - "movq %%mm4, 16(%%edi) \n\t" - "psrlq $32, %%mm0 \n\t" // z z z z 0 2 1 0 - "movq %%mm3, 8(%%edi) \n\t" - "punpckldq %%mm4, %%mm0 \n\t" // 1 0 2 1 0 2 1 0 - "subl $3, %%esi \n\t" - "movq %%mm0, (%%edi) \n\t" - "subl $24, %%edi \n\t" - "decl %%ecx \n\t" - "jnz .loop3_pass0 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width) // ecx -// doesn't work "i" (0x0000000000FFFFFFLL) // %1 (a.k.a. _const4) - -#if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1", "%mm2" // clobber list - , "%mm3", "%mm4" -#endif - ); - } - else if (((pass == 2) || (pass == 3)) && width) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $9, %%edi \n\t" - // (png_pass_inc[pass] - 1)*pixel_bytes - - ".loop3_pass2: \n\t" - "movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0 - "pand _const4, %%mm0 \n\t" // z z z z z 2 1 0 - "movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0 - "psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z - "movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z - "psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z - "psrlq $8, %%mm1 \n\t" // z z z z z z 2 1 - "por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z - "por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1 - "movq %%mm0, 4(%%edi) \n\t" - "psrlq $16, %%mm0 \n\t" // z z 2 1 0 2 1 0 - "subl $3, %%esi \n\t" - "movd %%mm0, (%%edi) \n\t" - "subl $12, %%edi \n\t" - "decl %%ecx \n\t" - "jnz .loop3_pass2 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width) // ecx - -#if 0 /* %mm0, ..., %mm2 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1", "%mm2" // clobber list -#endif - ); - } - else if (width) /* && ((pass == 4) || (pass == 5)) */ - { - int width_mmx = ((width >> 1) << 1) - 8; // GRR: huh? - if (width_mmx < 0) - width_mmx = 0; - width -= width_mmx; // 8 or 9 pix, 24 or 27 bytes - if (width_mmx) - { - // png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - // sptr points at last pixel in pre-expanded row - // dp points at last pixel position in expanded row - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $3, %%esi \n\t" - "subl $9, %%edi \n\t" - // (png_pass_inc[pass] + 1)*pixel_bytes - - ".loop3_pass4: \n\t" - "movq (%%esi), %%mm0 \n\t" // x x 5 4 3 2 1 0 - "movq %%mm0, %%mm1 \n\t" // x x 5 4 3 2 1 0 - "movq %%mm0, %%mm2 \n\t" // x x 5 4 3 2 1 0 - "psllq $24, %%mm0 \n\t" // 4 3 2 1 0 z z z - "pand _const4, %%mm1 \n\t" // z z z z z 2 1 0 - "psrlq $24, %%mm2 \n\t" // z z z x x 5 4 3 - "por %%mm1, %%mm0 \n\t" // 4 3 2 1 0 2 1 0 - "movq %%mm2, %%mm3 \n\t" // z z z x x 5 4 3 - "psllq $8, %%mm2 \n\t" // z z x x 5 4 3 z - "movq %%mm0, (%%edi) \n\t" - "psrlq $16, %%mm3 \n\t" // z z z z z x x 5 - "pand _const6, %%mm3 \n\t" // z z z z z z z 5 - "por %%mm3, %%mm2 \n\t" // z z x x 5 4 3 5 - "subl $6, %%esi \n\t" - "movd %%mm2, 8(%%edi) \n\t" - "subl $12, %%edi \n\t" - "subl $2, %%ecx \n\t" - "jnz .loop3_pass4 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0, ..., %mm3 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1" // clobber list - , "%mm2", "%mm3" -#endif - ); - } - - sptr -= width_mmx*3; - dp -= width_mmx*6; - for (i = width; i; i--) - { - png_byte v[8]; - int j; - - png_memcpy(v, sptr, 3); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, 3); - dp -= 3; - } - sptr -= 3; - } - } - } /* end of pixel_bytes == 3 */ - - //-------------------------------------------------------------- - else if (pixel_bytes == 1) - { - if (((pass == 0) || (pass == 1)) && width) - { - int width_mmx = ((width >> 2) << 2); - width -= width_mmx; // 0-3 pixels => 0-3 bytes - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $3, %%esi \n\t" - "subl $31, %%edi \n\t" - - ".loop1_pass0: \n\t" - "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 - "movq %%mm0, %%mm1 \n\t" // x x x x 3 2 1 0 - "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0 - "movq %%mm0, %%mm2 \n\t" // 3 3 2 2 1 1 0 0 - "punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0 - "movq %%mm0, %%mm3 \n\t" // 1 1 1 1 0 0 0 0 - "punpckldq %%mm0, %%mm0 \n\t" // 0 0 0 0 0 0 0 0 - "punpckhdq %%mm3, %%mm3 \n\t" // 1 1 1 1 1 1 1 1 - "movq %%mm0, (%%edi) \n\t" - "punpckhwd %%mm2, %%mm2 \n\t" // 3 3 3 3 2 2 2 2 - "movq %%mm3, 8(%%edi) \n\t" - "movq %%mm2, %%mm4 \n\t" // 3 3 3 3 2 2 2 2 - "punpckldq %%mm2, %%mm2 \n\t" // 2 2 2 2 2 2 2 2 - "punpckhdq %%mm4, %%mm4 \n\t" // 3 3 3 3 3 3 3 3 - "movq %%mm2, 16(%%edi) \n\t" - "subl $4, %%esi \n\t" - "movq %%mm4, 24(%%edi) \n\t" - "subl $32, %%edi \n\t" - "subl $4, %%ecx \n\t" - "jnz .loop1_pass0 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1", "%mm2" // clobber list - , "%mm3", "%mm4" -#endif - ); - } - - sptr -= width_mmx; - dp -= width_mmx*8; - for (i = width; i; i--) - { - int j; - - /* I simplified this part in version 1.0.4e - * here and in several other instances where - * pixel_bytes == 1 -- GR-P - * - * Original code: - * - * png_byte v[8]; - * png_memcpy(v, sptr, pixel_bytes); - * for (j = 0; j < png_pass_inc[pass]; j++) - * { - * png_memcpy(dp, v, pixel_bytes); - * dp -= pixel_bytes; - * } - * sptr -= pixel_bytes; - * - * Replacement code is in the next three lines: - */ - - for (j = 0; j < png_pass_inc[pass]; j++) - *dp-- = *sptr; - --sptr; - } - } - else if (((pass == 2) || (pass == 3)) && width) - { - int width_mmx = ((width >> 2) << 2); - width -= width_mmx; // 0-3 pixels => 0-3 bytes - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $3, %%esi \n\t" - "subl $15, %%edi \n\t" - - ".loop1_pass2: \n\t" - "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 - "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0 - "movq %%mm0, %%mm1 \n\t" // 3 3 2 2 1 1 0 0 - "punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0 - "punpckhwd %%mm1, %%mm1 \n\t" // 3 3 3 3 2 2 2 2 - "movq %%mm0, (%%edi) \n\t" - "subl $4, %%esi \n\t" - "movq %%mm1, 8(%%edi) \n\t" - "subl $16, %%edi \n\t" - "subl $4, %%ecx \n\t" - "jnz .loop1_pass2 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1" // clobber list -#endif - ); - } - - sptr -= width_mmx; - dp -= width_mmx*4; - for (i = width; i; i--) - { - int j; - - for (j = 0; j < png_pass_inc[pass]; j++) - *dp-- = *sptr; - --sptr; - } - } - else if (width) /* && ((pass == 4) || (pass == 5)) */ - { - int width_mmx = ((width >> 3) << 3); - width -= width_mmx; // 0-3 pixels => 0-3 bytes - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $7, %%esi \n\t" - "subl $15, %%edi \n\t" - - ".loop1_pass4: \n\t" - "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 - "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0 - "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0 - "punpckhbw %%mm1, %%mm1 \n\t" // 7 7 6 6 5 5 4 4 - "movq %%mm1, 8(%%edi) \n\t" - "subl $8, %%esi \n\t" - "movq %%mm0, (%%edi) \n\t" - "subl $16, %%edi \n\t" - "subl $8, %%ecx \n\t" - "jnz .loop1_pass4 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (none) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1" // clobber list -#endif - ); - } - - sptr -= width_mmx; - dp -= width_mmx*2; - for (i = width; i; i--) - { - int j; - - for (j = 0; j < png_pass_inc[pass]; j++) - *dp-- = *sptr; - --sptr; - } - } - } /* end of pixel_bytes == 1 */ - - //-------------------------------------------------------------- - else if (pixel_bytes == 2) - { - if (((pass == 0) || (pass == 1)) && width) - { - int width_mmx = ((width >> 1) << 1); - width -= width_mmx; // 0,1 pixels => 0,2 bytes - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $2, %%esi \n\t" - "subl $30, %%edi \n\t" - - ".loop2_pass0: \n\t" - "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 - "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0 - "movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0 - "punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0 - "punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2 - "movq %%mm0, (%%edi) \n\t" - "movq %%mm0, 8(%%edi) \n\t" - "movq %%mm1, 16(%%edi) \n\t" - "subl $4, %%esi \n\t" - "movq %%mm1, 24(%%edi) \n\t" - "subl $32, %%edi \n\t" - "subl $2, %%ecx \n\t" - "jnz .loop2_pass0 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1" // clobber list -#endif - ); - } - - sptr -= (width_mmx*2 - 2); // sign fixed - dp -= (width_mmx*16 - 2); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 2; - png_memcpy(v, sptr, 2); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 2; - png_memcpy(dp, v, 2); - } - } - } - else if (((pass == 2) || (pass == 3)) && width) - { - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; // 0,1 pixels => 0,2 bytes - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $2, %%esi \n\t" - "subl $14, %%edi \n\t" - - ".loop2_pass2: \n\t" - "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 - "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0 - "movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0 - "punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0 - "punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2 - "movq %%mm0, (%%edi) \n\t" - "subl $4, %%esi \n\t" - "movq %%mm1, 8(%%edi) \n\t" - "subl $16, %%edi \n\t" - "subl $2, %%ecx \n\t" - "jnz .loop2_pass2 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1" // clobber list -#endif - ); - } - - sptr -= (width_mmx*2 - 2); // sign fixed - dp -= (width_mmx*8 - 2); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 2; - png_memcpy(v, sptr, 2); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 2; - png_memcpy(dp, v, 2); - } - } - } - else if (width) // pass == 4 or 5 - { - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; // 0,1 pixels => 0,2 bytes - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $2, %%esi \n\t" - "subl $6, %%edi \n\t" - - ".loop2_pass4: \n\t" - "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 - "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0 - "subl $4, %%esi \n\t" - "movq %%mm0, (%%edi) \n\t" - "subl $8, %%edi \n\t" - "subl $2, %%ecx \n\t" - "jnz .loop2_pass4 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0" // clobber list -#endif - ); - } - - sptr -= (width_mmx*2 - 2); // sign fixed - dp -= (width_mmx*4 - 2); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 2; - png_memcpy(v, sptr, 2); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 2; - png_memcpy(dp, v, 2); - } - } - } - } /* end of pixel_bytes == 2 */ - - //-------------------------------------------------------------- - else if (pixel_bytes == 4) - { - if (((pass == 0) || (pass == 1)) && width) - { - int width_mmx = ((width >> 1) << 1); - width -= width_mmx; // 0,1 pixels => 0,4 bytes - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $4, %%esi \n\t" - "subl $60, %%edi \n\t" - - ".loop4_pass0: \n\t" - "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 - "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0 - "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0 - "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4 - "movq %%mm0, (%%edi) \n\t" - "movq %%mm0, 8(%%edi) \n\t" - "movq %%mm0, 16(%%edi) \n\t" - "movq %%mm0, 24(%%edi) \n\t" - "movq %%mm1, 32(%%edi) \n\t" - "movq %%mm1, 40(%%edi) \n\t" - "movq %%mm1, 48(%%edi) \n\t" - "subl $8, %%esi \n\t" - "movq %%mm1, 56(%%edi) \n\t" - "subl $64, %%edi \n\t" - "subl $2, %%ecx \n\t" - "jnz .loop4_pass0 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1" // clobber list -#endif - ); - } - - sptr -= (width_mmx*4 - 4); // sign fixed - dp -= (width_mmx*32 - 4); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 4; - png_memcpy(v, sptr, 4); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 4; - png_memcpy(dp, v, 4); - } - } - } - else if (((pass == 2) || (pass == 3)) && width) - { - int width_mmx = ((width >> 1) << 1); - width -= width_mmx; // 0,1 pixels => 0,4 bytes - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $4, %%esi \n\t" - "subl $28, %%edi \n\t" - - ".loop4_pass2: \n\t" - "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 - "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0 - "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0 - "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4 - "movq %%mm0, (%%edi) \n\t" - "movq %%mm0, 8(%%edi) \n\t" - "movq %%mm1, 16(%%edi) \n\t" - "movq %%mm1, 24(%%edi) \n\t" - "subl $8, %%esi \n\t" - "subl $32, %%edi \n\t" - "subl $2, %%ecx \n\t" - "jnz .loop4_pass2 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1" // clobber list -#endif - ); - } - - sptr -= (width_mmx*4 - 4); // sign fixed - dp -= (width_mmx*16 - 4); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 4; - png_memcpy(v, sptr, 4); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 4; - png_memcpy(dp, v, 4); - } - } - } - else if (width) // pass == 4 or 5 - { - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; // 0,1 pixels => 0,4 bytes - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $4, %%esi \n\t" - "subl $12, %%edi \n\t" - - ".loop4_pass4: \n\t" - "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 - "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0 - "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0 - "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4 - "movq %%mm0, (%%edi) \n\t" - "subl $8, %%esi \n\t" - "movq %%mm1, 8(%%edi) \n\t" - "subl $16, %%edi \n\t" - "subl $2, %%ecx \n\t" - "jnz .loop4_pass4 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width_mmx) // ecx - -#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0", "%mm1" // clobber list -#endif - ); - } - - sptr -= (width_mmx*4 - 4); // sign fixed - dp -= (width_mmx*8 - 4); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 4; - png_memcpy(v, sptr, 4); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 4; - png_memcpy(dp, v, 4); - } - } - } - } /* end of pixel_bytes == 4 */ - - //-------------------------------------------------------------- - else if (pixel_bytes == 8) - { -// GRR TEST: should work, but needs testing (special 64-bit version of rpng2?) - // GRR NOTE: no need to combine passes here! - if (((pass == 0) || (pass == 1)) && width) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - // source is 8-byte RRGGBBAA - // dest is 64-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA ... - __asm__ __volatile__ ( - "subl $56, %%edi \n\t" // start of last block - - ".loop8_pass0: \n\t" - "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 - "movq %%mm0, (%%edi) \n\t" - "movq %%mm0, 8(%%edi) \n\t" - "movq %%mm0, 16(%%edi) \n\t" - "movq %%mm0, 24(%%edi) \n\t" - "movq %%mm0, 32(%%edi) \n\t" - "movq %%mm0, 40(%%edi) \n\t" - "movq %%mm0, 48(%%edi) \n\t" - "subl $8, %%esi \n\t" - "movq %%mm0, 56(%%edi) \n\t" - "subl $64, %%edi \n\t" - "decl %%ecx \n\t" - "jnz .loop8_pass0 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width) // ecx - -#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0" // clobber list -#endif - ); - } - else if (((pass == 2) || (pass == 3)) && width) - { - // source is 8-byte RRGGBBAA - // dest is 32-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $24, %%edi \n\t" // start of last block - - ".loop8_pass2: \n\t" - "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 - "movq %%mm0, (%%edi) \n\t" - "movq %%mm0, 8(%%edi) \n\t" - "movq %%mm0, 16(%%edi) \n\t" - "subl $8, %%esi \n\t" - "movq %%mm0, 24(%%edi) \n\t" - "subl $32, %%edi \n\t" - "decl %%ecx \n\t" - "jnz .loop8_pass2 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width) // ecx - -#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0" // clobber list -#endif - ); - } - } - else if (width) // pass == 4 or 5 - { - // source is 8-byte RRGGBBAA - // dest is 16-byte RRGGBBAA RRGGBBAA - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; - if (width_mmx) - { - int dummy_value_c; // fix 'forbidden register spilled' - int dummy_value_S; - int dummy_value_D; - - __asm__ __volatile__ ( - "subl $8, %%edi \n\t" // start of last block - - ".loop8_pass4: \n\t" - "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 - "movq %%mm0, (%%edi) \n\t" - "subl $8, %%esi \n\t" - "movq %%mm0, 8(%%edi) \n\t" - "subl $16, %%edi \n\t" - "decl %%ecx \n\t" - "jnz .loop8_pass4 \n\t" - "EMMS \n\t" // DONE - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "1" (sptr), // esi // input regs - "2" (dp), // edi - "0" (width) // ecx - -#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */ - : "%mm0" // clobber list -#endif - ); - } - } - - } /* end of pixel_bytes == 8 */ - - //-------------------------------------------------------------- - else if (pixel_bytes == 6) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, 6); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, 6); - dp -= 6; - } - sptr -= 6; - } - } /* end of pixel_bytes == 6 */ - - //-------------------------------------------------------------- - else - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, pixel_bytes); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sptr-= pixel_bytes; - } - } - } // end of _mmx_supported ======================================== - - else /* MMX not supported: use modified C code - takes advantage - * of inlining of memcpy for a constant */ - /* GRR 19991007: does it? or should pixel_bytes in each - * block be replaced with immediate value (e.g., 1)? */ - /* GRR 19991017: replaced with constants in each case */ - { - if (pixel_bytes == 1) - { - for (i = width; i; i--) - { - int j; - for (j = 0; j < png_pass_inc[pass]; j++) - *dp-- = *sptr; - --sptr; - } - } - else if (pixel_bytes == 3) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, 3); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, 3); - dp -= 3; - } - sptr -= 3; - } - } - else if (pixel_bytes == 2) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, 2); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, 2); - dp -= 2; - } - sptr -= 2; - } - } - else if (pixel_bytes == 4) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, 4); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, 4); - dp -= 4; - } - sptr -= 4; - } - } - else if (pixel_bytes == 6) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, 6); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, 6); - dp -= 6; - } - sptr -= 6; - } - } - else if (pixel_bytes == 8) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, 8); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, 8); - dp -= 8; - } - sptr -= 8; - } - } - else // GRR: should never be reached - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, pixel_bytes); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sptr -= pixel_bytes; - } - } - - } /* end if (MMX not supported) */ - break; - } - } /* end switch (row_info->pixel_depth) */ - - row_info->width = final_width; - row_info->rowbytes = ((final_width * - (png_uint_32)row_info->pixel_depth + 7) >> 3); - } - -} /* end png_do_read_interlace() */ - -#endif /* PNG_HAVE_ASSEMBLER_READ_INTERLACE */ -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - - - - -// These variables are utilized in the functions below. They are declared -// globally here to ensure alignment on 8-byte boundaries. - -union uAll { - long long use; - double align; -} _LBCarryMask = {0x0101010101010101LL}, - _HBClearMask = {0x7f7f7f7f7f7f7f7fLL}, - _ActiveMask, _ActiveMask2, _ActiveMaskEnd, _ShiftBpp, _ShiftRem; - - - - -//===========================================================================// -// // -// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ A V G // -// // -//===========================================================================// - -// Optimized code for PNG Average filter decoder - -static void /* PRIVATE */ -png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row, - png_bytep prev_row) -{ - int bpp; - int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error - int dummy_value_S; - int dummy_value_D; - - bpp = (row_info->pixel_depth + 7) >> 3; // get # bytes per pixel - _FullLength = row_info->rowbytes; // # of bytes to filter - - __asm__ __volatile__ ( - // initialize address pointers and offset -#ifdef __PIC__ - "pushl %%ebx \n\t" // save index to Global Offset Table -#endif -//pre "movl row, %%edi \n\t" // edi: Avg(x) - "xorl %%ebx, %%ebx \n\t" // ebx: x - "movl %%edi, %%edx \n\t" -//pre "movl prev_row, %%esi \n\t" // esi: Prior(x) -//pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) - "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp) - - "xorl %%eax,%%eax \n\t" - - // Compute the Raw value for the first bpp bytes - // Raw(x) = Avg(x) + (Prior(x)/2) - "avg_rlp: \n\t" - "movb (%%esi,%%ebx,),%%al \n\t" // load al with Prior(x) - "incl %%ebx \n\t" - "shrb %%al \n\t" // divide by 2 - "addb -1(%%edi,%%ebx,),%%al \n\t" // add Avg(x); -1 to offset inc ebx -//pre "cmpl bpp, %%ebx \n\t" // (bpp is preloaded into ecx) - "cmpl %%ecx, %%ebx \n\t" - "movb %%al,-1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx - "jb avg_rlp \n\t" // mov does not affect flags - - // get # of bytes to alignment - "movl %%edi, _dif \n\t" // take start of row - "addl %%ebx, _dif \n\t" // add bpp - "addl $0xf, _dif \n\t" // add 7+8 to incr past alignment bdry - "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary - "subl %%edi, _dif \n\t" // subtract from start => value ebx at - "jz avg_go \n\t" // alignment - - // fix alignment - // Compute the Raw value for the bytes up to the alignment boundary - // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) - "xorl %%ecx, %%ecx \n\t" - - "avg_lp1: \n\t" - "xorl %%eax, %%eax \n\t" - "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x) - "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp) - "addw %%cx, %%ax \n\t" - "incl %%ebx \n\t" - "shrw %%ax \n\t" // divide by 2 - "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx - "cmpl _dif, %%ebx \n\t" // check if at alignment boundary - "movb %%al, -1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx - "jb avg_lp1 \n\t" // repeat until at alignment boundary - - "avg_go: \n\t" - "movl _FullLength, %%eax \n\t" - "movl %%eax, %%ecx \n\t" - "subl %%ebx, %%eax \n\t" // subtract alignment fix - "andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8 - "subl %%eax, %%ecx \n\t" // drop over bytes from original length - "movl %%ecx, _MMXLength \n\t" -#ifdef __PIC__ - "popl %%ebx \n\t" // restore index to Global Offset Table -#endif - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "0" (bpp), // ecx // input regs - "1" (prev_row), // esi - "2" (row) // edi - - : "%eax", "%edx" // clobber list -#ifndef __PIC__ - , "%ebx" -#endif - // GRR: INCLUDE "memory" as clobbered? (_dif, _MMXLength) - // (seems to work fine without...) - ); - - // now do the math for the rest of the row - switch (bpp) - { - case 3: - { - _ActiveMask.use = 0x0000000000ffffffLL; - _ShiftBpp.use = 24; // == 3 * 8 - _ShiftRem.use = 40; // == 64 - 24 - - __asm__ __volatile__ ( - // re-init address pointers and offset - "movq _ActiveMask, %%mm7 \n\t" - "movl _dif, %%ecx \n\t" // ecx: x = offset to - "movq _LBCarryMask, %%mm5 \n\t" // alignment boundary -// preload "movl row, %%edi \n\t" // edi: Avg(x) - "movq _HBClearMask, %%mm4 \n\t" -// preload "movl prev_row, %%esi \n\t" // esi: Prior(x) - - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes - // (correct pos. in loop below) - "avg_3lp: \n\t" - "movq (%%edi,%%ecx,), %%mm0 \n\t" // load mm0 with Avg(x) - "movq %%mm5, %%mm3 \n\t" - "psrlq _ShiftRem, %%mm2 \n\t" // correct position Raw(x-bpp) data - "movq (%%esi,%%ecx,), %%mm1 \n\t" // load mm1 with Prior(x) - "movq %%mm7, %%mm6 \n\t" - "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte - "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 - "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for each byte - // add 1st active group (Raw(x-bpp)/2) to average with LBCarry - "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting LBCarrys - "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 (only valid for active group) - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) for each byte - "pand %%mm6, %%mm2 \n\t" // leave only Active Group 1 bytes to add to Avg - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg for each Active - // byte - // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry - "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover bytes 3-5 - "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 - "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly - "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting LBCarrys - "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 (only valid for active group) - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) for each byte - "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 bytes to add to Avg - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg for each Active - // byte - - // add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry - "psllq _ShiftBpp, %%mm6 \n\t" // shift mm6 mask to cover last two - // bytes - "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 - "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly - // Data only needs to be shifted once here to - // get the correct x-bpp offset. - "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting LBCarrys - "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 (only valid for active group) - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) for each byte - "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 bytes to add to Avg - "addl $8, %%ecx \n\t" - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg for each Active - // byte - // now ready to write back to memory - "movq %%mm0, -8(%%edi,%%ecx,) \n\t" - // move updated Raw(x) to use as Raw(x-bpp) for next loop - "cmpl _MMXLength, %%ecx \n\t" - "movq %%mm0, %%mm2 \n\t" // mov updated Raw(x) to mm2 - "jb avg_3lp \n\t" - - : "=S" (dummy_value_S), // output regs (dummy) - "=D" (dummy_value_D) - - : "0" (prev_row), // esi // input regs - "1" (row) // edi - - : "%ecx" // clobber list -#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3" - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - break; // end 3 bpp - - case 6: - case 4: - //case 7: // who wrote this? PNG doesn't support 5 or 7 bytes/pixel - //case 5: // GRR BOGUS - { - _ActiveMask.use = 0xffffffffffffffffLL; // use shift below to clear - // appropriate inactive bytes - _ShiftBpp.use = bpp << 3; - _ShiftRem.use = 64 - _ShiftBpp.use; - - __asm__ __volatile__ ( - "movq _HBClearMask, %%mm4 \n\t" - - // re-init address pointers and offset - "movl _dif, %%ecx \n\t" // ecx: x = offset to alignment boundary - - // load _ActiveMask and clear all bytes except for 1st active group - "movq _ActiveMask, %%mm7 \n\t" -// preload "movl row, %%edi \n\t" // edi: Avg(x) - "psrlq _ShiftRem, %%mm7 \n\t" -// preload "movl prev_row, %%esi \n\t" // esi: Prior(x) - "movq %%mm7, %%mm6 \n\t" - "movq _LBCarryMask, %%mm5 \n\t" - "psllq _ShiftBpp, %%mm6 \n\t" // create mask for 2nd active group - - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes - // (we correct pos. in loop below) - "avg_4lp: \n\t" - "movq (%%edi,%%ecx,), %%mm0 \n\t" - "psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly - "movq (%%esi,%%ecx,), %%mm1 \n\t" - // add (Prev_row/2) to average - "movq %%mm5, %%mm3 \n\t" - "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte - "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 - "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for each byte - // add 1st active group (Raw(x-bpp)/2) to average with _LBCarry - "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting LBCarrys - "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 (only valid for active group) - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) for each byte - "pand %%mm7, %%mm2 \n\t" // leave only Active Group 1 bytes to add to Avg - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg for each Active - // byte - // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry - "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 - "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly - "addl $8, %%ecx \n\t" - "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting LBCarrys - "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 (only valid for active group) - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) for each byte - "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 bytes to add to Avg - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg for each Active - // byte - "cmpl _MMXLength, %%ecx \n\t" - // now ready to write back to memory - "movq %%mm0, -8(%%edi,%%ecx,) \n\t" - // prep Raw(x-bpp) for next loop - "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 - "jb avg_4lp \n\t" - - : "=S" (dummy_value_S), // output regs (dummy) - "=D" (dummy_value_D) - - : "0" (prev_row), // esi // input regs - "1" (row) // edi - - : "%ecx" // clobber list -#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3" - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - break; // end 4,6 bpp - - case 2: - { - _ActiveMask.use = 0x000000000000ffffLL; - _ShiftBpp.use = 16; // == 2 * 8 - _ShiftRem.use = 48; // == 64 - 16 - - __asm__ __volatile__ ( - // load _ActiveMask - "movq _ActiveMask, %%mm7 \n\t" - // re-init address pointers and offset - "movl _dif, %%ecx \n\t" // ecx: x = offset to alignment boundary - "movq _LBCarryMask, %%mm5 \n\t" -// preload "movl row, %%edi \n\t" // edi: Avg(x) - "movq _HBClearMask, %%mm4 \n\t" -// preload "movl prev_row, %%esi \n\t" // esi: Prior(x) - - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes - // (we correct pos. in loop below) - "avg_2lp: \n\t" - "movq (%%edi,%%ecx,), %%mm0 \n\t" - "psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly - "movq (%%esi,%%ecx,), %%mm1 \n\t" // (GRR BUGFIX: was psllq) - // add (Prev_row/2) to average - "movq %%mm5, %%mm3 \n\t" - "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte - "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 - "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each byte - "movq %%mm7, %%mm6 \n\t" - "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for each byte - - // add 1st active group (Raw(x-bpp)/2) to average with _LBCarry - "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting LBCarrys - "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 (only valid for active group) - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) for each byte - "pand %%mm6, %%mm2 \n\t" // leave only Active Group 1 bytes to add to Avg - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg for each Active byte - - // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry - "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover bytes 2 & 3 - "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 - "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly - "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting LBCarrys - "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 (only valid for active group) - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) for each byte - "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 bytes to add to Avg - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg for each Active byte - - // add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry - "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover bytes 4 & 5 - "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 - "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly - "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting LBCarrys - "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 (only valid for active group) - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) for each byte - "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 bytes to add to Avg - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg for each Active byte - - // add 4th active group (Raw(x-bpp)/2) to average with _LBCarry - "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover bytes 6 & 7 - "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 - "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly - "addl $8, %%ecx \n\t" - "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting LBCarrys - "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 (only valid for active group) - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) for each byte - "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 bytes to add to Avg - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg for each Active byte - - "cmpl _MMXLength, %%ecx \n\t" - // now ready to write back to memory - "movq %%mm0, -8(%%edi,%%ecx,) \n\t" - // prep Raw(x-bpp) for next loop - "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 - "jb avg_2lp \n\t" - - : "=S" (dummy_value_S), // output regs (dummy) - "=D" (dummy_value_D) - - : "0" (prev_row), // esi // input regs - "1" (row) // edi - - : "%ecx" // clobber list -#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3" - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - break; // end 2 bpp - - case 1: - { - __asm__ __volatile__ ( - // re-init address pointers and offset -#ifdef __PIC__ - "pushl %%ebx \n\t" // save Global Offset Table index -#endif - "movl _dif, %%ebx \n\t" // ebx: x = offset to alignment boundary -// preload "movl row, %%edi \n\t" // edi: Avg(x) - "cmpl _FullLength, %%ebx \n\t" // test if offset at end of array - "jnb avg_1end \n\t" - // do Paeth decode for remaining bytes -// preload "movl prev_row, %%esi \n\t" // esi: Prior(x) - "movl %%edi, %%edx \n\t" -// preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) - "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp) - "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx - // in loop below - "avg_1lp: \n\t" - // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) - "xorl %%eax, %%eax \n\t" - "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x) - "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp) - "addw %%cx, %%ax \n\t" - "incl %%ebx \n\t" - "shrw %%ax \n\t" // divide by 2 - "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx - "cmpl _FullLength, %%ebx \n\t" // check if at end of array - "movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x); - // mov does not affect flags; -1 to offset inc ebx - "jb avg_1lp \n\t" - - "avg_1end: \n\t" -#ifdef __PIC__ - "popl %%ebx \n\t" // Global Offset Table index -#endif - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "0" (bpp), // ecx // input regs - "1" (prev_row), // esi - "2" (row) // edi - - : "%eax", "%edx" // clobber list -#ifndef __PIC__ - , "%ebx" -#endif - ); - } - return; // end 1 bpp - - case 8: - { - __asm__ __volatile__ ( - // re-init address pointers and offset - "movl _dif, %%ecx \n\t" // ecx: x == offset to alignment - "movq _LBCarryMask, %%mm5 \n\t" // boundary -// preload "movl row, %%edi \n\t" // edi: Avg(x) - "movq _HBClearMask, %%mm4 \n\t" -// preload "movl prev_row, %%esi \n\t" // esi: Prior(x) - - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes - // (NO NEED to correct pos. in loop below) - - "avg_8lp: \n\t" - "movq (%%edi,%%ecx,), %%mm0 \n\t" - "movq %%mm5, %%mm3 \n\t" - "movq (%%esi,%%ecx,), %%mm1 \n\t" - "addl $8, %%ecx \n\t" - "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte - "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 - "pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte - // where both lsb's were == 1 - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7, each byte - "paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg, each byte - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7, each byte - "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg, each - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each - "cmpl _MMXLength, %%ecx \n\t" - "movq %%mm0, -8(%%edi,%%ecx,) \n\t" - "movq %%mm0, %%mm2 \n\t" // reuse as Raw(x-bpp) - "jb avg_8lp \n\t" - - : "=S" (dummy_value_S), // output regs (dummy) - "=D" (dummy_value_D) - - : "0" (prev_row), // esi // input regs - "1" (row) // edi - - : "%ecx" // clobber list -#if 0 /* %mm0, ..., %mm5 not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2" - , "%mm3", "%mm4", "%mm5" -#endif - ); - } - break; // end 8 bpp - - default: // bpp greater than 8 (!= 1,2,3,4,[5],6,[7],8) - { - - // GRR: PRINT ERROR HERE: SHOULD NEVER BE REACHED - fprintf(stderr, - "libpng: internal logic error (png_read_filter_row_mmx_avg())\n"); - -#if 0 - __asm__ __volatile__ ( - "movq _LBCarryMask, %%mm5 \n\t" - // re-init address pointers and offset - "movl _dif, %%ebx \n\t" // ebx: x = offset to alignment boundary - "movl row, %%edi \n\t" // edi: Avg(x) - "movq _HBClearMask, %%mm4 \n\t" - "movl %%edi, %%edx \n\t" - "movl prev_row, %%esi \n\t" // esi: Prior(x) - "subl bpp, %%edx \n\t" // edx: Raw(x-bpp) - "avg_Alp: \n\t" - "movq (%%edi,%%ebx,), %%mm0 \n\t" - "movq %%mm5, %%mm3 \n\t" - "movq (%%esi,%%ebx,), %%mm1 \n\t" - "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte - "movq (%%edx,%%ebx,), %%mm2 \n\t" - "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 - "pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte where both - // lsb's were == 1 - "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 - "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg for each byte - "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each byte - "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for each byte - "addl $8, %%ebx \n\t" - "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each byte - "cmpl _MMXLength, %%ebx \n\t" - "movq %%mm0, -8(%%edi,%%ebx,) \n\t" - "jb avg_Alp \n\t" - - : // FIXASM: output regs/vars go here, e.g.: "=m" (memory_var) - - : // FIXASM: input regs, e.g.: "c" (count), "S" (src), "D" (dest) - - : "%ebx", "%edx", "%edi", "%esi" // CHECKASM: clobber list - ); -#endif /* 0 - NEVER REACHED */ - } - break; - - } // end switch (bpp) - - __asm__ __volatile__ ( - // MMX acceleration complete; now do clean-up - // check if any remaining bytes left to decode -#ifdef __PIC__ - "pushl %%ebx \n\t" // save index to Global Offset Table -#endif - "movl _MMXLength, %%ebx \n\t" // ebx: x == offset bytes after MMX -//pre "movl row, %%edi \n\t" // edi: Avg(x) - "cmpl _FullLength, %%ebx \n\t" // test if offset at end of array - "jnb avg_end \n\t" - - // do Avg decode for remaining bytes -//pre "movl prev_row, %%esi \n\t" // esi: Prior(x) - "movl %%edi, %%edx \n\t" -//pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) - "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp) - "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below - - "avg_lp2: \n\t" - // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) - "xorl %%eax, %%eax \n\t" - "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x) - "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp) - "addw %%cx, %%ax \n\t" - "incl %%ebx \n\t" - "shrw %%ax \n\t" // divide by 2 - "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx - "cmpl _FullLength, %%ebx \n\t" // check if at end of array - "movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x) [mov does not - "jb avg_lp2 \n\t" // affect flags; -1 to offset inc ebx] - - "avg_end: \n\t" - "EMMS \n\t" // end MMX; prep for poss. FP instrs. -#ifdef __PIC__ - "popl %%ebx \n\t" // restore index to Global Offset Table -#endif - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "0" (bpp), // ecx // input regs - "1" (prev_row), // esi - "2" (row) // edi - - : "%eax", "%edx" // clobber list -#ifndef __PIC__ - , "%ebx" -#endif - ); - -} /* end png_read_filter_row_mmx_avg() */ - - - - -//===========================================================================// -// // -// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ P A E T H // -// // -//===========================================================================// - -// Optimized code for PNG Paeth filter decoder - -static void /* PRIVATE */ -png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row, - png_bytep prev_row) -{ - int bpp; - int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error - int dummy_value_S; - int dummy_value_D; - - bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel - _FullLength = row_info->rowbytes; // # of bytes to filter - - __asm__ __volatile__ ( -#ifdef __PIC__ - "pushl %%ebx \n\t" // save index to Global Offset Table -#endif - "xorl %%ebx, %%ebx \n\t" // ebx: x offset -//pre "movl row, %%edi \n\t" - "xorl %%edx, %%edx \n\t" // edx: x-bpp offset -//pre "movl prev_row, %%esi \n\t" - "xorl %%eax, %%eax \n\t" - - // Compute the Raw value for the first bpp bytes - // Note: the formula works out to be always - // Paeth(x) = Raw(x) + Prior(x) where x < bpp - "paeth_rlp: \n\t" - "movb (%%edi,%%ebx,), %%al \n\t" - "addb (%%esi,%%ebx,), %%al \n\t" - "incl %%ebx \n\t" -//pre "cmpl bpp, %%ebx \n\t" (bpp is preloaded into ecx) - "cmpl %%ecx, %%ebx \n\t" - "movb %%al, -1(%%edi,%%ebx,) \n\t" - "jb paeth_rlp \n\t" - // get # of bytes to alignment - "movl %%edi, _dif \n\t" // take start of row - "addl %%ebx, _dif \n\t" // add bpp - "xorl %%ecx, %%ecx \n\t" - "addl $0xf, _dif \n\t" // add 7 + 8 to incr past alignment boundary - "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary - "subl %%edi, _dif \n\t" // subtract from start ==> value ebx at alignment - "jz paeth_go \n\t" - // fix alignment - - "paeth_lp1: \n\t" - "xorl %%eax, %%eax \n\t" - // pav = p - a = (a + b - c) - a = b - c - "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al - "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl - "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) - "movl %%eax, _patemp \n\t" // Save pav for later use - "xorl %%eax, %%eax \n\t" - // pbv = p - b = (a + b - c) - b = a - c - "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al - "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) - "movl %%eax, %%ecx \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "addl _patemp, %%eax \n\t" // pcv = pav + pbv - // pc = abs(pcv) - "testl $0x80000000, %%eax \n\t" - "jz paeth_pca \n\t" - "negl %%eax \n\t" // reverse sign of neg values - - "paeth_pca: \n\t" - "movl %%eax, _pctemp \n\t" // save pc for later use - // pb = abs(pbv) - "testl $0x80000000, %%ecx \n\t" - "jz paeth_pba \n\t" - "negl %%ecx \n\t" // reverse sign of neg values - - "paeth_pba: \n\t" - "movl %%ecx, _pbtemp \n\t" // save pb for later use - // pa = abs(pav) - "movl _patemp, %%eax \n\t" - "testl $0x80000000, %%eax \n\t" - "jz paeth_paa \n\t" - "negl %%eax \n\t" // reverse sign of neg values - - "paeth_paa: \n\t" - "movl %%eax, _patemp \n\t" // save pa for later use - // test if pa <= pb - "cmpl %%ecx, %%eax \n\t" - "jna paeth_abb \n\t" - // pa > pb; now test if pb <= pc - "cmpl _pctemp, %%ecx \n\t" - "jna paeth_bbc \n\t" - // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl - "jmp paeth_paeth \n\t" - - "paeth_bbc: \n\t" - // pb <= pc; Raw(x) = Paeth(x) + Prior(x) - "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl - "jmp paeth_paeth \n\t" - - "paeth_abb: \n\t" - // pa <= pb; now test if pa <= pc - "cmpl _pctemp, %%eax \n\t" - "jna paeth_abc \n\t" - // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl - "jmp paeth_paeth \n\t" - - "paeth_abc: \n\t" - // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) - "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl - - "paeth_paeth: \n\t" - "incl %%ebx \n\t" - "incl %%edx \n\t" - // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 - "addb %%cl, -1(%%edi,%%ebx,) \n\t" - "cmpl _dif, %%ebx \n\t" - "jb paeth_lp1 \n\t" - - "paeth_go: \n\t" - "movl _FullLength, %%ecx \n\t" - "movl %%ecx, %%eax \n\t" - "subl %%ebx, %%eax \n\t" // subtract alignment fix - "andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8 - "subl %%eax, %%ecx \n\t" // drop over bytes from original length - "movl %%ecx, _MMXLength \n\t" -#ifdef __PIC__ - "popl %%ebx \n\t" // restore index to Global Offset Table -#endif - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "0" (bpp), // ecx // input regs - "1" (prev_row), // esi - "2" (row) // edi - - : "%eax", "%edx" // clobber list -#ifndef __PIC__ - , "%ebx" -#endif - ); - - // now do the math for the rest of the row - switch (bpp) - { - case 3: - { - _ActiveMask.use = 0x0000000000ffffffLL; - _ActiveMaskEnd.use = 0xffff000000000000LL; - _ShiftBpp.use = 24; // == bpp(3) * 8 - _ShiftRem.use = 40; // == 64 - 24 - - __asm__ __volatile__ ( - "movl _dif, %%ecx \n\t" -// preload "movl row, %%edi \n\t" -// preload "movl prev_row, %%esi \n\t" - "pxor %%mm0, %%mm0 \n\t" - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%ecx,), %%mm1 \n\t" - "paeth_3lp: \n\t" - "psrlq _ShiftRem, %%mm1 \n\t" // shift last 3 bytes to 1st 3 bytes - "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) - "punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a - "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // prep c=Prior(x-bpp) bytes - "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b - "psrlq _ShiftRem, %%mm3 \n\t" // shift last 3 bytes to 1st 3 bytes - // pav = p - a = (a + b - c) - a = b - c - "movq %%mm2, %%mm4 \n\t" - "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c - // pbv = p - b = (a + b - c) - b = a - c - "movq %%mm1, %%mm5 \n\t" - "psubw %%mm3, %%mm4 \n\t" - "pxor %%mm7, %%mm7 \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "movq %%mm4, %%mm6 \n\t" - "psubw %%mm3, %%mm5 \n\t" - - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 - "paddw %%mm5, %%mm6 \n\t" - "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 - "psubw %%mm0, %%mm4 \n\t" - "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 - "psubw %%mm0, %%mm4 \n\t" - "psubw %%mm7, %%mm5 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 - "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm7, %%mm5 \n\t" - "psubw %%mm0, %%mm6 \n\t" - // test pa <= pb - "movq %%mm4, %%mm7 \n\t" - "psubw %%mm0, %%mm6 \n\t" - "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? - "movq %%mm7, %%mm0 \n\t" - // use mm7 mask to merge pa & pb - "pand %%mm7, %%mm5 \n\t" - // use mm0 mask copy to merge a & b - "pand %%mm0, %%mm2 \n\t" - "pandn %%mm4, %%mm7 \n\t" - "pandn %%mm1, %%mm0 \n\t" - "paddw %%mm5, %%mm7 \n\t" - "paddw %%mm2, %%mm0 \n\t" - // test ((pa <= pb)? pa:pb) <= pc - "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? - "pxor %%mm1, %%mm1 \n\t" - "pand %%mm7, %%mm3 \n\t" - "pandn %%mm0, %%mm7 \n\t" - "paddw %%mm3, %%mm7 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "packuswb %%mm1, %%mm7 \n\t" - "movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp) - "pand _ActiveMask, %%mm7 \n\t" - "movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1 - "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x) - "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c - "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value - "movq %%mm7, %%mm1 \n\t" // now mm1 will be used as Raw(x-bpp) - // now do Paeth for 2nd set of bytes (3-5) - "psrlq _ShiftBpp, %%mm2 \n\t" // load b=Prior(x) step 2 - "punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a - "pxor %%mm7, %%mm7 \n\t" - "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b - // pbv = p - b = (a + b - c) - b = a - c - "movq %%mm1, %%mm5 \n\t" - // pav = p - a = (a + b - c) - a = b - c - "movq %%mm2, %%mm4 \n\t" - "psubw %%mm3, %%mm5 \n\t" - "psubw %%mm3, %%mm4 \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = - // pav + pbv = pbv + pav - "movq %%mm5, %%mm6 \n\t" - "paddw %%mm4, %%mm6 \n\t" - - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - "pcmpgtw %%mm5, %%mm0 \n\t" // create mask pbv bytes < 0 - "pcmpgtw %%mm4, %%mm7 \n\t" // create mask pav bytes < 0 - "pand %%mm5, %%mm0 \n\t" // only pbv bytes < 0 in mm0 - "pand %%mm4, %%mm7 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm0, %%mm5 \n\t" - "psubw %%mm7, %%mm4 \n\t" - "psubw %%mm0, %%mm5 \n\t" - "psubw %%mm7, %%mm4 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 - "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm0, %%mm6 \n\t" - // test pa <= pb - "movq %%mm4, %%mm7 \n\t" - "psubw %%mm0, %%mm6 \n\t" - "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? - "movq %%mm7, %%mm0 \n\t" - // use mm7 mask to merge pa & pb - "pand %%mm7, %%mm5 \n\t" - // use mm0 mask copy to merge a & b - "pand %%mm0, %%mm2 \n\t" - "pandn %%mm4, %%mm7 \n\t" - "pandn %%mm1, %%mm0 \n\t" - "paddw %%mm5, %%mm7 \n\t" - "paddw %%mm2, %%mm0 \n\t" - // test ((pa <= pb)? pa:pb) <= pc - "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? - "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) - "pand %%mm7, %%mm3 \n\t" - "pandn %%mm0, %%mm7 \n\t" - "pxor %%mm1, %%mm1 \n\t" - "paddw %%mm3, %%mm7 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "packuswb %%mm1, %%mm7 \n\t" - "movq %%mm2, %%mm3 \n\t" // load c=Prior(x-bpp) step 1 - "pand _ActiveMask, %%mm7 \n\t" - "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b - "psllq _ShiftBpp, %%mm7 \n\t" // shift bytes to 2nd group of 3 bytes - // pav = p - a = (a + b - c) - a = b - c - "movq %%mm2, %%mm4 \n\t" - "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x) - "psllq _ShiftBpp, %%mm3 \n\t" // load c=Prior(x-bpp) step 2 - "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value - "movq %%mm7, %%mm1 \n\t" - "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c - "psllq _ShiftBpp, %%mm1 \n\t" // shift bytes - // now mm1 will be used as Raw(x-bpp) - // now do Paeth for 3rd, and final, set of bytes (6-7) - "pxor %%mm7, %%mm7 \n\t" - "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a - "psubw %%mm3, %%mm4 \n\t" - // pbv = p - b = (a + b - c) - b = a - c - "movq %%mm1, %%mm5 \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "movq %%mm4, %%mm6 \n\t" - "psubw %%mm3, %%mm5 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "paddw %%mm5, %%mm6 \n\t" - - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 - "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 - "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 - "psubw %%mm0, %%mm4 \n\t" - "psubw %%mm7, %%mm5 \n\t" - "psubw %%mm0, %%mm4 \n\t" - "psubw %%mm7, %%mm5 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 - "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm0, %%mm6 \n\t" - // test pa <= pb - "movq %%mm4, %%mm7 \n\t" - "psubw %%mm0, %%mm6 \n\t" - "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? - "movq %%mm7, %%mm0 \n\t" - // use mm0 mask copy to merge a & b - "pand %%mm0, %%mm2 \n\t" - // use mm7 mask to merge pa & pb - "pand %%mm7, %%mm5 \n\t" - "pandn %%mm1, %%mm0 \n\t" - "pandn %%mm4, %%mm7 \n\t" - "paddw %%mm2, %%mm0 \n\t" - "paddw %%mm5, %%mm7 \n\t" - // test ((pa <= pb)? pa:pb) <= pc - "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? - "pand %%mm7, %%mm3 \n\t" - "pandn %%mm0, %%mm7 \n\t" - "paddw %%mm3, %%mm7 \n\t" - "pxor %%mm1, %%mm1 \n\t" - "packuswb %%mm7, %%mm1 \n\t" - // step ecx to next set of 8 bytes and repeat loop til done - "addl $8, %%ecx \n\t" - "pand _ActiveMaskEnd, %%mm1 \n\t" - "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x) - - "cmpl _MMXLength, %%ecx \n\t" - "pxor %%mm0, %%mm0 \n\t" // pxor does not affect flags - "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value - // mm1 will be used as Raw(x-bpp) next loop - // mm3 ready to be used as Prior(x-bpp) next loop - "jb paeth_3lp \n\t" - - : "=S" (dummy_value_S), // output regs (dummy) - "=D" (dummy_value_D) - - : "0" (prev_row), // esi // input regs - "1" (row) // edi - - : "%ecx" // clobber list -#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3" - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - break; // end 3 bpp - - case 6: - //case 7: // GRR BOGUS - //case 5: // GRR BOGUS - { - _ActiveMask.use = 0x00000000ffffffffLL; - _ActiveMask2.use = 0xffffffff00000000LL; - _ShiftBpp.use = bpp << 3; // == bpp * 8 - _ShiftRem.use = 64 - _ShiftBpp.use; - - __asm__ __volatile__ ( - "movl _dif, %%ecx \n\t" -// preload "movl row, %%edi \n\t" -// preload "movl prev_row, %%esi \n\t" - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%ecx,), %%mm1 \n\t" - "pxor %%mm0, %%mm0 \n\t" - - "paeth_6lp: \n\t" - // must shift to position Raw(x-bpp) data - "psrlq _ShiftRem, %%mm1 \n\t" - // do first set of 4 bytes - "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes - "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a - "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) - "punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b - // must shift to position Prior(x-bpp) data - "psrlq _ShiftRem, %%mm3 \n\t" - // pav = p - a = (a + b - c) - a = b - c - "movq %%mm2, %%mm4 \n\t" - "punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c - // pbv = p - b = (a + b - c) - b = a - c - "movq %%mm1, %%mm5 \n\t" - "psubw %%mm3, %%mm4 \n\t" - "pxor %%mm7, %%mm7 \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "movq %%mm4, %%mm6 \n\t" - "psubw %%mm3, %%mm5 \n\t" - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 - "paddw %%mm5, %%mm6 \n\t" - "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 - "psubw %%mm0, %%mm4 \n\t" - "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 - "psubw %%mm0, %%mm4 \n\t" - "psubw %%mm7, %%mm5 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 - "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm7, %%mm5 \n\t" - "psubw %%mm0, %%mm6 \n\t" - // test pa <= pb - "movq %%mm4, %%mm7 \n\t" - "psubw %%mm0, %%mm6 \n\t" - "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? - "movq %%mm7, %%mm0 \n\t" - // use mm7 mask to merge pa & pb - "pand %%mm7, %%mm5 \n\t" - // use mm0 mask copy to merge a & b - "pand %%mm0, %%mm2 \n\t" - "pandn %%mm4, %%mm7 \n\t" - "pandn %%mm1, %%mm0 \n\t" - "paddw %%mm5, %%mm7 \n\t" - "paddw %%mm2, %%mm0 \n\t" - // test ((pa <= pb)? pa:pb) <= pc - "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? - "pxor %%mm1, %%mm1 \n\t" - "pand %%mm7, %%mm3 \n\t" - "pandn %%mm0, %%mm7 \n\t" - "paddw %%mm3, %%mm7 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "packuswb %%mm1, %%mm7 \n\t" - "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp) - "pand _ActiveMask, %%mm7 \n\t" - "psrlq _ShiftRem, %%mm3 \n\t" - "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) step 1 - "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor and Raw(x) - "movq %%mm2, %%mm6 \n\t" - "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value - "movq -8(%%edi,%%ecx,), %%mm1 \n\t" - "psllq _ShiftBpp, %%mm6 \n\t" - "movq %%mm7, %%mm5 \n\t" - "psrlq _ShiftRem, %%mm1 \n\t" - "por %%mm6, %%mm3 \n\t" - "psllq _ShiftBpp, %%mm5 \n\t" - "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c - "por %%mm5, %%mm1 \n\t" - // do second set of 4 bytes - "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b - "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a - // pav = p - a = (a + b - c) - a = b - c - "movq %%mm2, %%mm4 \n\t" - // pbv = p - b = (a + b - c) - b = a - c - "movq %%mm1, %%mm5 \n\t" - "psubw %%mm3, %%mm4 \n\t" - "pxor %%mm7, %%mm7 \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "movq %%mm4, %%mm6 \n\t" - "psubw %%mm3, %%mm5 \n\t" - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 - "paddw %%mm5, %%mm6 \n\t" - "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 - "psubw %%mm0, %%mm4 \n\t" - "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 - "psubw %%mm0, %%mm4 \n\t" - "psubw %%mm7, %%mm5 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 - "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm7, %%mm5 \n\t" - "psubw %%mm0, %%mm6 \n\t" - // test pa <= pb - "movq %%mm4, %%mm7 \n\t" - "psubw %%mm0, %%mm6 \n\t" - "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? - "movq %%mm7, %%mm0 \n\t" - // use mm7 mask to merge pa & pb - "pand %%mm7, %%mm5 \n\t" - // use mm0 mask copy to merge a & b - "pand %%mm0, %%mm2 \n\t" - "pandn %%mm4, %%mm7 \n\t" - "pandn %%mm1, %%mm0 \n\t" - "paddw %%mm5, %%mm7 \n\t" - "paddw %%mm2, %%mm0 \n\t" - // test ((pa <= pb)? pa:pb) <= pc - "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? - "pxor %%mm1, %%mm1 \n\t" - "pand %%mm7, %%mm3 \n\t" - "pandn %%mm0, %%mm7 \n\t" - "pxor %%mm1, %%mm1 \n\t" - "paddw %%mm3, %%mm7 \n\t" - "pxor %%mm0, %%mm0 \n\t" - // step ecx to next set of 8 bytes and repeat loop til done - "addl $8, %%ecx \n\t" - "packuswb %%mm7, %%mm1 \n\t" - "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x) - "cmpl _MMXLength, %%ecx \n\t" - "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value - // mm1 will be used as Raw(x-bpp) next loop - "jb paeth_6lp \n\t" - - : "=S" (dummy_value_S), // output regs (dummy) - "=D" (dummy_value_D) - - : "0" (prev_row), // esi // input regs - "1" (row) // edi - - : "%ecx" // clobber list -#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3" - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - break; // end 6 bpp - - case 4: - { - _ActiveMask.use = 0x00000000ffffffffLL; - - __asm__ __volatile__ ( - "movl _dif, %%ecx \n\t" -// preload "movl row, %%edi \n\t" -// preload "movl prev_row, %%esi \n\t" - "pxor %%mm0, %%mm0 \n\t" - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read - // a=Raw(x-bpp) bytes - "paeth_4lp: \n\t" - // do first set of 4 bytes - "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes - "punpckhbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a - "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) - "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b - // pav = p - a = (a + b - c) - a = b - c - "movq %%mm2, %%mm4 \n\t" - "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c - // pbv = p - b = (a + b - c) - b = a - c - "movq %%mm1, %%mm5 \n\t" - "psubw %%mm3, %%mm4 \n\t" - "pxor %%mm7, %%mm7 \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "movq %%mm4, %%mm6 \n\t" - "psubw %%mm3, %%mm5 \n\t" - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 - "paddw %%mm5, %%mm6 \n\t" - "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 - "psubw %%mm0, %%mm4 \n\t" - "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 - "psubw %%mm0, %%mm4 \n\t" - "psubw %%mm7, %%mm5 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 - "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm7, %%mm5 \n\t" - "psubw %%mm0, %%mm6 \n\t" - // test pa <= pb - "movq %%mm4, %%mm7 \n\t" - "psubw %%mm0, %%mm6 \n\t" - "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? - "movq %%mm7, %%mm0 \n\t" - // use mm7 mask to merge pa & pb - "pand %%mm7, %%mm5 \n\t" - // use mm0 mask copy to merge a & b - "pand %%mm0, %%mm2 \n\t" - "pandn %%mm4, %%mm7 \n\t" - "pandn %%mm1, %%mm0 \n\t" - "paddw %%mm5, %%mm7 \n\t" - "paddw %%mm2, %%mm0 \n\t" - // test ((pa <= pb)? pa:pb) <= pc - "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? - "pxor %%mm1, %%mm1 \n\t" - "pand %%mm7, %%mm3 \n\t" - "pandn %%mm0, %%mm7 \n\t" - "paddw %%mm3, %%mm7 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "packuswb %%mm1, %%mm7 \n\t" - "movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp) - "pand _ActiveMask, %%mm7 \n\t" - "movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1 - "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x) - "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c - "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value - "movq %%mm7, %%mm1 \n\t" // now mm1 will be used as Raw(x-bpp) - // do second set of 4 bytes - "punpckhbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b - "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a - // pav = p - a = (a + b - c) - a = b - c - "movq %%mm2, %%mm4 \n\t" - // pbv = p - b = (a + b - c) - b = a - c - "movq %%mm1, %%mm5 \n\t" - "psubw %%mm3, %%mm4 \n\t" - "pxor %%mm7, %%mm7 \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "movq %%mm4, %%mm6 \n\t" - "psubw %%mm3, %%mm5 \n\t" - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 - "paddw %%mm5, %%mm6 \n\t" - "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 - "psubw %%mm0, %%mm4 \n\t" - "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 - "psubw %%mm0, %%mm4 \n\t" - "psubw %%mm7, %%mm5 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 - "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm7, %%mm5 \n\t" - "psubw %%mm0, %%mm6 \n\t" - // test pa <= pb - "movq %%mm4, %%mm7 \n\t" - "psubw %%mm0, %%mm6 \n\t" - "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? - "movq %%mm7, %%mm0 \n\t" - // use mm7 mask to merge pa & pb - "pand %%mm7, %%mm5 \n\t" - // use mm0 mask copy to merge a & b - "pand %%mm0, %%mm2 \n\t" - "pandn %%mm4, %%mm7 \n\t" - "pandn %%mm1, %%mm0 \n\t" - "paddw %%mm5, %%mm7 \n\t" - "paddw %%mm2, %%mm0 \n\t" - // test ((pa <= pb)? pa:pb) <= pc - "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? - "pxor %%mm1, %%mm1 \n\t" - "pand %%mm7, %%mm3 \n\t" - "pandn %%mm0, %%mm7 \n\t" - "pxor %%mm1, %%mm1 \n\t" - "paddw %%mm3, %%mm7 \n\t" - "pxor %%mm0, %%mm0 \n\t" - // step ecx to next set of 8 bytes and repeat loop til done - "addl $8, %%ecx \n\t" - "packuswb %%mm7, %%mm1 \n\t" - "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add predictor with Raw(x) - "cmpl _MMXLength, %%ecx \n\t" - "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value - // mm1 will be used as Raw(x-bpp) next loop - "jb paeth_4lp \n\t" - - : "=S" (dummy_value_S), // output regs (dummy) - "=D" (dummy_value_D) - - : "0" (prev_row), // esi // input regs - "1" (row) // edi - - : "%ecx" // clobber list -#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3" - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - break; // end 4 bpp - - case 8: // bpp == 8 - { - _ActiveMask.use = 0x00000000ffffffffLL; - - __asm__ __volatile__ ( - "movl _dif, %%ecx \n\t" -// preload "movl row, %%edi \n\t" -// preload "movl prev_row, %%esi \n\t" - "pxor %%mm0, %%mm0 \n\t" - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read - // a=Raw(x-bpp) bytes - "paeth_8lp: \n\t" - // do first set of 4 bytes - "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes - "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a - "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) - "punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b - // pav = p - a = (a + b - c) - a = b - c - "movq %%mm2, %%mm4 \n\t" - "punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c - // pbv = p - b = (a + b - c) - b = a - c - "movq %%mm1, %%mm5 \n\t" - "psubw %%mm3, %%mm4 \n\t" - "pxor %%mm7, %%mm7 \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "movq %%mm4, %%mm6 \n\t" - "psubw %%mm3, %%mm5 \n\t" - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 - "paddw %%mm5, %%mm6 \n\t" - "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 - "psubw %%mm0, %%mm4 \n\t" - "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 - "psubw %%mm0, %%mm4 \n\t" - "psubw %%mm7, %%mm5 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 - "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm7, %%mm5 \n\t" - "psubw %%mm0, %%mm6 \n\t" - // test pa <= pb - "movq %%mm4, %%mm7 \n\t" - "psubw %%mm0, %%mm6 \n\t" - "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? - "movq %%mm7, %%mm0 \n\t" - // use mm7 mask to merge pa & pb - "pand %%mm7, %%mm5 \n\t" - // use mm0 mask copy to merge a & b - "pand %%mm0, %%mm2 \n\t" - "pandn %%mm4, %%mm7 \n\t" - "pandn %%mm1, %%mm0 \n\t" - "paddw %%mm5, %%mm7 \n\t" - "paddw %%mm2, %%mm0 \n\t" - // test ((pa <= pb)? pa:pb) <= pc - "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? - "pxor %%mm1, %%mm1 \n\t" - "pand %%mm7, %%mm3 \n\t" - "pandn %%mm0, %%mm7 \n\t" - "paddw %%mm3, %%mm7 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "packuswb %%mm1, %%mm7 \n\t" - "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes - "pand _ActiveMask, %%mm7 \n\t" - "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) - "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x) - "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c - "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value - "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // read a=Raw(x-bpp) bytes - - // do second set of 4 bytes - "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b - "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a - // pav = p - a = (a + b - c) - a = b - c - "movq %%mm2, %%mm4 \n\t" - // pbv = p - b = (a + b - c) - b = a - c - "movq %%mm1, %%mm5 \n\t" - "psubw %%mm3, %%mm4 \n\t" - "pxor %%mm7, %%mm7 \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "movq %%mm4, %%mm6 \n\t" - "psubw %%mm3, %%mm5 \n\t" - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 - "paddw %%mm5, %%mm6 \n\t" - "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 - "psubw %%mm0, %%mm4 \n\t" - "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 - "psubw %%mm0, %%mm4 \n\t" - "psubw %%mm7, %%mm5 \n\t" - "pxor %%mm0, %%mm0 \n\t" - "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 - "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 - "psubw %%mm7, %%mm5 \n\t" - "psubw %%mm0, %%mm6 \n\t" - // test pa <= pb - "movq %%mm4, %%mm7 \n\t" - "psubw %%mm0, %%mm6 \n\t" - "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? - "movq %%mm7, %%mm0 \n\t" - // use mm7 mask to merge pa & pb - "pand %%mm7, %%mm5 \n\t" - // use mm0 mask copy to merge a & b - "pand %%mm0, %%mm2 \n\t" - "pandn %%mm4, %%mm7 \n\t" - "pandn %%mm1, %%mm0 \n\t" - "paddw %%mm5, %%mm7 \n\t" - "paddw %%mm2, %%mm0 \n\t" - // test ((pa <= pb)? pa:pb) <= pc - "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? - "pxor %%mm1, %%mm1 \n\t" - "pand %%mm7, %%mm3 \n\t" - "pandn %%mm0, %%mm7 \n\t" - "pxor %%mm1, %%mm1 \n\t" - "paddw %%mm3, %%mm7 \n\t" - "pxor %%mm0, %%mm0 \n\t" - // step ecx to next set of 8 bytes and repeat loop til done - "addl $8, %%ecx \n\t" - "packuswb %%mm7, %%mm1 \n\t" - "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x) - "cmpl _MMXLength, %%ecx \n\t" - "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value - // mm1 will be used as Raw(x-bpp) next loop - "jb paeth_8lp \n\t" - - : "=S" (dummy_value_S), // output regs (dummy) - "=D" (dummy_value_D) - - : "0" (prev_row), // esi // input regs - "1" (row) // edi - - : "%ecx" // clobber list -#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3" - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - break; // end 8 bpp - - case 1: // bpp = 1 - case 2: // bpp = 2 - default: // bpp > 8 - { - __asm__ __volatile__ ( -#ifdef __PIC__ - "pushl %%ebx \n\t" // save Global Offset Table index -#endif - "movl _dif, %%ebx \n\t" - "cmpl _FullLength, %%ebx \n\t" - "jnb paeth_dend \n\t" - -// preload "movl row, %%edi \n\t" -// preload "movl prev_row, %%esi \n\t" - // do Paeth decode for remaining bytes - "movl %%ebx, %%edx \n\t" -// preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) - "subl %%ecx, %%edx \n\t" // edx = ebx - bpp - "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx - - "paeth_dlp: \n\t" - "xorl %%eax, %%eax \n\t" - // pav = p - a = (a + b - c) - a = b - c - "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al - "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl - "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) - "movl %%eax, _patemp \n\t" // Save pav for later use - "xorl %%eax, %%eax \n\t" - // pbv = p - b = (a + b - c) - b = a - c - "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al - "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) - "movl %%eax, %%ecx \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "addl _patemp, %%eax \n\t" // pcv = pav + pbv - // pc = abs(pcv) - "testl $0x80000000, %%eax \n\t" - "jz paeth_dpca \n\t" - "negl %%eax \n\t" // reverse sign of neg values - - "paeth_dpca: \n\t" - "movl %%eax, _pctemp \n\t" // save pc for later use - // pb = abs(pbv) - "testl $0x80000000, %%ecx \n\t" - "jz paeth_dpba \n\t" - "negl %%ecx \n\t" // reverse sign of neg values - - "paeth_dpba: \n\t" - "movl %%ecx, _pbtemp \n\t" // save pb for later use - // pa = abs(pav) - "movl _patemp, %%eax \n\t" - "testl $0x80000000, %%eax \n\t" - "jz paeth_dpaa \n\t" - "negl %%eax \n\t" // reverse sign of neg values - - "paeth_dpaa: \n\t" - "movl %%eax, _patemp \n\t" // save pa for later use - // test if pa <= pb - "cmpl %%ecx, %%eax \n\t" - "jna paeth_dabb \n\t" - // pa > pb; now test if pb <= pc - "cmpl _pctemp, %%ecx \n\t" - "jna paeth_dbbc \n\t" - // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl - "jmp paeth_dpaeth \n\t" - - "paeth_dbbc: \n\t" - // pb <= pc; Raw(x) = Paeth(x) + Prior(x) - "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl - "jmp paeth_dpaeth \n\t" - - "paeth_dabb: \n\t" - // pa <= pb; now test if pa <= pc - "cmpl _pctemp, %%eax \n\t" - "jna paeth_dabc \n\t" - // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl - "jmp paeth_dpaeth \n\t" - - "paeth_dabc: \n\t" - // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) - "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl - - "paeth_dpaeth: \n\t" - "incl %%ebx \n\t" - "incl %%edx \n\t" - // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 - "addb %%cl, -1(%%edi,%%ebx,) \n\t" - "cmpl _FullLength, %%ebx \n\t" - "jb paeth_dlp \n\t" - - "paeth_dend: \n\t" -#ifdef __PIC__ - "popl %%ebx \n\t" // index to Global Offset Table -#endif - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "0" (bpp), // ecx // input regs - "1" (prev_row), // esi - "2" (row) // edi - - : "%eax", "%edx" // clobber list -#ifndef __PIC__ - , "%ebx" -#endif - ); - } - return; // No need to go further with this one - - } // end switch (bpp) - - __asm__ __volatile__ ( - // MMX acceleration complete; now do clean-up - // check if any remaining bytes left to decode -#ifdef __PIC__ - "pushl %%ebx \n\t" // save index to Global Offset Table -#endif - "movl _MMXLength, %%ebx \n\t" - "cmpl _FullLength, %%ebx \n\t" - "jnb paeth_end \n\t" -//pre "movl row, %%edi \n\t" -//pre "movl prev_row, %%esi \n\t" - // do Paeth decode for remaining bytes - "movl %%ebx, %%edx \n\t" -//pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) - "subl %%ecx, %%edx \n\t" // edx = ebx - bpp - "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below - - "paeth_lp2: \n\t" - "xorl %%eax, %%eax \n\t" - // pav = p - a = (a + b - c) - a = b - c - "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al - "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl - "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) - "movl %%eax, _patemp \n\t" // Save pav for later use - "xorl %%eax, %%eax \n\t" - // pbv = p - b = (a + b - c) - b = a - c - "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al - "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) - "movl %%eax, %%ecx \n\t" - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - "addl _patemp, %%eax \n\t" // pcv = pav + pbv - // pc = abs(pcv) - "testl $0x80000000, %%eax \n\t" - "jz paeth_pca2 \n\t" - "negl %%eax \n\t" // reverse sign of neg values - - "paeth_pca2: \n\t" - "movl %%eax, _pctemp \n\t" // save pc for later use - // pb = abs(pbv) - "testl $0x80000000, %%ecx \n\t" - "jz paeth_pba2 \n\t" - "negl %%ecx \n\t" // reverse sign of neg values - - "paeth_pba2: \n\t" - "movl %%ecx, _pbtemp \n\t" // save pb for later use - // pa = abs(pav) - "movl _patemp, %%eax \n\t" - "testl $0x80000000, %%eax \n\t" - "jz paeth_paa2 \n\t" - "negl %%eax \n\t" // reverse sign of neg values - - "paeth_paa2: \n\t" - "movl %%eax, _patemp \n\t" // save pa for later use - // test if pa <= pb - "cmpl %%ecx, %%eax \n\t" - "jna paeth_abb2 \n\t" - // pa > pb; now test if pb <= pc - "cmpl _pctemp, %%ecx \n\t" - "jna paeth_bbc2 \n\t" - // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl - "jmp paeth_paeth2 \n\t" - - "paeth_bbc2: \n\t" - // pb <= pc; Raw(x) = Paeth(x) + Prior(x) - "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl - "jmp paeth_paeth2 \n\t" - - "paeth_abb2: \n\t" - // pa <= pb; now test if pa <= pc - "cmpl _pctemp, %%eax \n\t" - "jna paeth_abc2 \n\t" - // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl - "jmp paeth_paeth2 \n\t" - - "paeth_abc2: \n\t" - // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) - "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl - - "paeth_paeth2: \n\t" - "incl %%ebx \n\t" - "incl %%edx \n\t" - // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 - "addb %%cl, -1(%%edi,%%ebx,) \n\t" - "cmpl _FullLength, %%ebx \n\t" - "jb paeth_lp2 \n\t" - - "paeth_end: \n\t" - "EMMS \n\t" // end MMX; prep for poss. FP instrs. -#ifdef __PIC__ - "popl %%ebx \n\t" // restore index to Global Offset Table -#endif - - : "=c" (dummy_value_c), // output regs (dummy) - "=S" (dummy_value_S), - "=D" (dummy_value_D) - - : "0" (bpp), // ecx // input regs - "1" (prev_row), // esi - "2" (row) // edi - - : "%eax", "%edx" // clobber list (no input regs!) -#ifndef __PIC__ - , "%ebx" -#endif - ); - -} /* end png_read_filter_row_mmx_paeth() */ - - - - -//===========================================================================// -// // -// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ S U B // -// // -//===========================================================================// - -// Optimized code for PNG Sub filter decoder - -static void /* PRIVATE */ -png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row) -{ - int bpp; - int dummy_value_a; - int dummy_value_D; - - bpp = (row_info->pixel_depth + 7) >> 3; // calc number of bytes per pixel - _FullLength = row_info->rowbytes - bpp; // number of bytes to filter - - __asm__ __volatile__ ( -//pre "movl row, %%edi \n\t" - "movl %%edi, %%esi \n\t" // lp = row -//pre "movl bpp, %%eax \n\t" - "addl %%eax, %%edi \n\t" // rp = row + bpp -//irr "xorl %%eax, %%eax \n\t" - // get # of bytes to alignment - "movl %%edi, _dif \n\t" // take start of row - "addl $0xf, _dif \n\t" // add 7 + 8 to incr past - // alignment boundary - "xorl %%ecx, %%ecx \n\t" - "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary - "subl %%edi, _dif \n\t" // subtract from start ==> value - "jz sub_go \n\t" // ecx at alignment - - "sub_lp1: \n\t" // fix alignment - "movb (%%esi,%%ecx,), %%al \n\t" - "addb %%al, (%%edi,%%ecx,) \n\t" - "incl %%ecx \n\t" - "cmpl _dif, %%ecx \n\t" - "jb sub_lp1 \n\t" - - "sub_go: \n\t" - "movl _FullLength, %%eax \n\t" - "movl %%eax, %%edx \n\t" - "subl %%ecx, %%edx \n\t" // subtract alignment fix - "andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8 - "subl %%edx, %%eax \n\t" // drop over bytes from length - "movl %%eax, _MMXLength \n\t" - - : "=a" (dummy_value_a), // 0 // output regs (dummy) - "=D" (dummy_value_D) // 1 - - : "0" (bpp), // eax // input regs - "1" (row) // edi - - : "%ebx", "%ecx", "%edx" // clobber list - , "%esi" - -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3" - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - - // now do the math for the rest of the row - switch (bpp) - { - case 3: - { - _ActiveMask.use = 0x0000ffffff000000LL; - _ShiftBpp.use = 24; // == 3 * 8 - _ShiftRem.use = 40; // == 64 - 24 - - __asm__ __volatile__ ( -// preload "movl row, %%edi \n\t" - "movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd - // active byte group - "movl %%edi, %%esi \n\t" // lp = row -// preload "movl bpp, %%eax \n\t" - "addl %%eax, %%edi \n\t" // rp = row + bpp - "movq %%mm7, %%mm6 \n\t" - "movl _dif, %%edx \n\t" - "psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover - // 3rd active byte group - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%edx,), %%mm1 \n\t" - - "sub_3lp: \n\t" // shift data for adding first - "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask; - // shift clears inactive bytes) - // add 1st active group - "movq (%%edi,%%edx,), %%mm0 \n\t" - "paddb %%mm1, %%mm0 \n\t" - - // add 2nd active group - "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 - "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly - "pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group - "paddb %%mm1, %%mm0 \n\t" - - // add 3rd active group - "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 - "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly - "pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group - "addl $8, %%edx \n\t" - "paddb %%mm1, %%mm0 \n\t" - - "cmpl _MMXLength, %%edx \n\t" - "movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array - "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop - "jb sub_3lp \n\t" - - : "=a" (dummy_value_a), // 0 // output regs (dummy) - "=D" (dummy_value_D) // 1 - - : "0" (bpp), // eax // input regs - "1" (row) // edi - - : "%edx", "%esi" // clobber list -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm6", "%mm7" -#endif - ); - } - break; - - case 1: - { - __asm__ __volatile__ ( - "movl _dif, %%edx \n\t" -// preload "movl row, %%edi \n\t" - "cmpl _FullLength, %%edx \n\t" - "jnb sub_1end \n\t" - "movl %%edi, %%esi \n\t" // lp = row - "xorl %%eax, %%eax \n\t" -// preload "movl bpp, %%eax \n\t" - "addl %%eax, %%edi \n\t" // rp = row + bpp - - "sub_1lp: \n\t" - "movb (%%esi,%%edx,), %%al \n\t" - "addb %%al, (%%edi,%%edx,) \n\t" - "incl %%edx \n\t" - "cmpl _FullLength, %%edx \n\t" - "jb sub_1lp \n\t" - - "sub_1end: \n\t" - - : "=a" (dummy_value_a), // 0 // output regs (dummy) - "=D" (dummy_value_D) // 1 - - : "0" (bpp), // eax // input regs - "1" (row) // edi - - : "%edx", "%esi" // clobber list - ); - } - return; - - case 6: - case 4: - //case 7: // GRR BOGUS - //case 5: // GRR BOGUS - { - _ShiftBpp.use = bpp << 3; - _ShiftRem.use = 64 - _ShiftBpp.use; - - __asm__ __volatile__ ( -// preload "movl row, %%edi \n\t" - "movl _dif, %%edx \n\t" - "movl %%edi, %%esi \n\t" // lp = row -// preload "movl bpp, %%eax \n\t" - "addl %%eax, %%edi \n\t" // rp = row + bpp - - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%edx,), %%mm1 \n\t" - - "sub_4lp: \n\t" // shift data for adding first - "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask; - // shift clears inactive bytes) - "movq (%%edi,%%edx,), %%mm0 \n\t" - "paddb %%mm1, %%mm0 \n\t" - - // add 2nd active group - "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 - "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly - "addl $8, %%edx \n\t" - "paddb %%mm1, %%mm0 \n\t" - - "cmpl _MMXLength, %%edx \n\t" - "movq %%mm0, -8(%%edi,%%edx,) \n\t" - "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop - "jb sub_4lp \n\t" - - : "=a" (dummy_value_a), // 0 // output regs (dummy) - "=D" (dummy_value_D) // 1 - - : "0" (bpp), // eax // input regs - "1" (row) // edi - - : "%edx", "%esi" // clobber list -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1" -#endif - ); - } - break; - - case 2: - { - _ActiveMask.use = 0x00000000ffff0000LL; - _ShiftBpp.use = 16; // == 2 * 8 - _ShiftRem.use = 48; // == 64 - 16 - - __asm__ __volatile__ ( - "movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd - // active byte group - "movl _dif, %%edx \n\t" - "movq %%mm7, %%mm6 \n\t" -// preload "movl row, %%edi \n\t" - "psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover - // 3rd active byte group - "movl %%edi, %%esi \n\t" // lp = row - "movq %%mm6, %%mm5 \n\t" -// preload "movl bpp, %%eax \n\t" - "addl %%eax, %%edi \n\t" // rp = row + bpp - "psllq _ShiftBpp, %%mm5 \n\t" // move mask in mm5 to cover - // 4th active byte group - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%edx,), %%mm1 \n\t" - - "sub_2lp: \n\t" // shift data for adding first - "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask; - // shift clears inactive bytes) - // add 1st active group - "movq (%%edi,%%edx,), %%mm0 \n\t" - "paddb %%mm1, %%mm0 \n\t" - - // add 2nd active group - "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 - "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly - "pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group - "paddb %%mm1, %%mm0 \n\t" - - // add 3rd active group - "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 - "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly - "pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group - "paddb %%mm1, %%mm0 \n\t" - - // add 4th active group - "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 - "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly - "pand %%mm5, %%mm1 \n\t" // mask to use 4th active group - "addl $8, %%edx \n\t" - "paddb %%mm1, %%mm0 \n\t" - "cmpl _MMXLength, %%edx \n\t" - "movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array - "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop - "jb sub_2lp \n\t" - - : "=a" (dummy_value_a), // 0 // output regs (dummy) - "=D" (dummy_value_D) // 1 - - : "0" (bpp), // eax // input regs - "1" (row) // edi - - : "%edx", "%esi" // clobber list -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm5", "%mm6", "%mm7" -#endif - ); - } - break; - - case 8: - { - __asm__ __volatile__ ( -// preload "movl row, %%edi \n\t" - "movl _dif, %%edx \n\t" - "movl %%edi, %%esi \n\t" // lp = row -// preload "movl bpp, %%eax \n\t" - "addl %%eax, %%edi \n\t" // rp = row + bpp - "movl _MMXLength, %%ecx \n\t" - - // prime the pump: load the first Raw(x-bpp) data set - "movq -8(%%edi,%%edx,), %%mm7 \n\t" - "andl $0x0000003f, %%ecx \n\t" // calc bytes over mult of 64 - - "sub_8lp: \n\t" - "movq (%%edi,%%edx,), %%mm0 \n\t" // load Sub(x) for 1st 8 bytes - "paddb %%mm7, %%mm0 \n\t" - "movq 8(%%edi,%%edx,), %%mm1 \n\t" // load Sub(x) for 2nd 8 bytes - "movq %%mm0, (%%edi,%%edx,) \n\t" // write Raw(x) for 1st 8 bytes - - // Now mm0 will be used as Raw(x-bpp) for the 2nd group of 8 bytes. - // This will be repeated for each group of 8 bytes with the 8th - // group being used as the Raw(x-bpp) for the 1st group of the - // next loop. - - "paddb %%mm0, %%mm1 \n\t" - "movq 16(%%edi,%%edx,), %%mm2 \n\t" // load Sub(x) for 3rd 8 bytes - "movq %%mm1, 8(%%edi,%%edx,) \n\t" // write Raw(x) for 2nd 8 bytes - "paddb %%mm1, %%mm2 \n\t" - "movq 24(%%edi,%%edx,), %%mm3 \n\t" // load Sub(x) for 4th 8 bytes - "movq %%mm2, 16(%%edi,%%edx,) \n\t" // write Raw(x) for 3rd 8 bytes - "paddb %%mm2, %%mm3 \n\t" - "movq 32(%%edi,%%edx,), %%mm4 \n\t" // load Sub(x) for 5th 8 bytes - "movq %%mm3, 24(%%edi,%%edx,) \n\t" // write Raw(x) for 4th 8 bytes - "paddb %%mm3, %%mm4 \n\t" - "movq 40(%%edi,%%edx,), %%mm5 \n\t" // load Sub(x) for 6th 8 bytes - "movq %%mm4, 32(%%edi,%%edx,) \n\t" // write Raw(x) for 5th 8 bytes - "paddb %%mm4, %%mm5 \n\t" - "movq 48(%%edi,%%edx,), %%mm6 \n\t" // load Sub(x) for 7th 8 bytes - "movq %%mm5, 40(%%edi,%%edx,) \n\t" // write Raw(x) for 6th 8 bytes - "paddb %%mm5, %%mm6 \n\t" - "movq 56(%%edi,%%edx,), %%mm7 \n\t" // load Sub(x) for 8th 8 bytes - "movq %%mm6, 48(%%edi,%%edx,) \n\t" // write Raw(x) for 7th 8 bytes - "addl $64, %%edx \n\t" - "paddb %%mm6, %%mm7 \n\t" - "cmpl %%ecx, %%edx \n\t" - "movq %%mm7, -8(%%edi,%%edx,) \n\t" // write Raw(x) for 8th 8 bytes - "jb sub_8lp \n\t" - - "cmpl _MMXLength, %%edx \n\t" - "jnb sub_8lt8 \n\t" - - "sub_8lpA: \n\t" - "movq (%%edi,%%edx,), %%mm0 \n\t" - "addl $8, %%edx \n\t" - "paddb %%mm7, %%mm0 \n\t" - "cmpl _MMXLength, %%edx \n\t" - "movq %%mm0, -8(%%edi,%%edx,) \n\t" // -8 to offset early addl edx - "movq %%mm0, %%mm7 \n\t" // move calculated Raw(x) data - // to mm1 to be new Raw(x-bpp) - // for next loop - "jb sub_8lpA \n\t" - - "sub_8lt8: \n\t" - - : "=a" (dummy_value_a), // 0 // output regs (dummy) - "=D" (dummy_value_D) // 1 - - : "0" (bpp), // eax // input regs - "1" (row) // edi - - : "%ecx", "%edx", "%esi" // clobber list -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3", "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - } - break; - - default: // bpp greater than 8 bytes GRR BOGUS - { - __asm__ __volatile__ ( - "movl _dif, %%edx \n\t" -// preload "movl row, %%edi \n\t" - "movl %%edi, %%esi \n\t" // lp = row -// preload "movl bpp, %%eax \n\t" - "addl %%eax, %%edi \n\t" // rp = row + bpp - - "sub_Alp: \n\t" - "movq (%%edi,%%edx,), %%mm0 \n\t" - "movq (%%esi,%%edx,), %%mm1 \n\t" - "addl $8, %%edx \n\t" - "paddb %%mm1, %%mm0 \n\t" - "cmpl _MMXLength, %%edx \n\t" - "movq %%mm0, -8(%%edi,%%edx,) \n\t" // mov does not affect flags; - // -8 to offset addl edx - "jb sub_Alp \n\t" - - : "=a" (dummy_value_a), // 0 // output regs (dummy) - "=D" (dummy_value_D) // 1 - - : "0" (bpp), // eax // input regs - "1" (row) // edi - - : "%edx", "%esi" // clobber list -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1" -#endif - ); - } - break; - - } // end switch (bpp) - - __asm__ __volatile__ ( - "movl _MMXLength, %%edx \n\t" -//pre "movl row, %%edi \n\t" - "cmpl _FullLength, %%edx \n\t" - "jnb sub_end \n\t" - - "movl %%edi, %%esi \n\t" // lp = row -//pre "movl bpp, %%eax \n\t" - "addl %%eax, %%edi \n\t" // rp = row + bpp - "xorl %%eax, %%eax \n\t" - - "sub_lp2: \n\t" - "movb (%%esi,%%edx,), %%al \n\t" - "addb %%al, (%%edi,%%edx,) \n\t" - "incl %%edx \n\t" - "cmpl _FullLength, %%edx \n\t" - "jb sub_lp2 \n\t" - - "sub_end: \n\t" - "EMMS \n\t" // end MMX instructions - - : "=a" (dummy_value_a), // 0 // output regs (dummy) - "=D" (dummy_value_D) // 1 - - : "0" (bpp), // eax // input regs - "1" (row) // edi - - : "%edx", "%esi" // clobber list - ); - -} // end of png_read_filter_row_mmx_sub() - - - - -//===========================================================================// -// // -// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ U P // -// // -//===========================================================================// - -// Optimized code for PNG Up filter decoder - -static void /* PRIVATE */ -png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row, - png_bytep prev_row) -{ - png_uint_32 len; - int dummy_value_d; // fix 'forbidden register 3 (dx) was spilled' error - int dummy_value_S; - int dummy_value_D; - - len = row_info->rowbytes; // number of bytes to filter - - __asm__ __volatile__ ( -//pre "movl row, %%edi \n\t" - // get # of bytes to alignment - "movl %%edi, %%ecx \n\t" - "xorl %%ebx, %%ebx \n\t" - "addl $0x7, %%ecx \n\t" - "xorl %%eax, %%eax \n\t" - "andl $0xfffffff8, %%ecx \n\t" -//pre "movl prev_row, %%esi \n\t" - "subl %%edi, %%ecx \n\t" - "jz up_go \n\t" - - "up_lp1: \n\t" // fix alignment - "movb (%%edi,%%ebx,), %%al \n\t" - "addb (%%esi,%%ebx,), %%al \n\t" - "incl %%ebx \n\t" - "cmpl %%ecx, %%ebx \n\t" - "movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to - "jb up_lp1 \n\t" // offset incl ebx - - "up_go: \n\t" -//pre "movl len, %%edx \n\t" - "movl %%edx, %%ecx \n\t" - "subl %%ebx, %%edx \n\t" // subtract alignment fix - "andl $0x0000003f, %%edx \n\t" // calc bytes over mult of 64 - "subl %%edx, %%ecx \n\t" // drop over bytes from length - - // unrolled loop - use all MMX registers and interleave to reduce - // number of branch instructions (loops) and reduce partial stalls - "up_loop: \n\t" - "movq (%%esi,%%ebx,), %%mm1 \n\t" - "movq (%%edi,%%ebx,), %%mm0 \n\t" - "movq 8(%%esi,%%ebx,), %%mm3 \n\t" - "paddb %%mm1, %%mm0 \n\t" - "movq 8(%%edi,%%ebx,), %%mm2 \n\t" - "movq %%mm0, (%%edi,%%ebx,) \n\t" - "paddb %%mm3, %%mm2 \n\t" - "movq 16(%%esi,%%ebx,), %%mm5 \n\t" - "movq %%mm2, 8(%%edi,%%ebx,) \n\t" - "movq 16(%%edi,%%ebx,), %%mm4 \n\t" - "movq 24(%%esi,%%ebx,), %%mm7 \n\t" - "paddb %%mm5, %%mm4 \n\t" - "movq 24(%%edi,%%ebx,), %%mm6 \n\t" - "movq %%mm4, 16(%%edi,%%ebx,) \n\t" - "paddb %%mm7, %%mm6 \n\t" - "movq 32(%%esi,%%ebx,), %%mm1 \n\t" - "movq %%mm6, 24(%%edi,%%ebx,) \n\t" - "movq 32(%%edi,%%ebx,), %%mm0 \n\t" - "movq 40(%%esi,%%ebx,), %%mm3 \n\t" - "paddb %%mm1, %%mm0 \n\t" - "movq 40(%%edi,%%ebx,), %%mm2 \n\t" - "movq %%mm0, 32(%%edi,%%ebx,) \n\t" - "paddb %%mm3, %%mm2 \n\t" - "movq 48(%%esi,%%ebx,), %%mm5 \n\t" - "movq %%mm2, 40(%%edi,%%ebx,) \n\t" - "movq 48(%%edi,%%ebx,), %%mm4 \n\t" - "movq 56(%%esi,%%ebx,), %%mm7 \n\t" - "paddb %%mm5, %%mm4 \n\t" - "movq 56(%%edi,%%ebx,), %%mm6 \n\t" - "movq %%mm4, 48(%%edi,%%ebx,) \n\t" - "addl $64, %%ebx \n\t" - "paddb %%mm7, %%mm6 \n\t" - "cmpl %%ecx, %%ebx \n\t" - "movq %%mm6, -8(%%edi,%%ebx,) \n\t" // (+56)movq does not affect flags; - "jb up_loop \n\t" // -8 to offset addl ebx - - "cmpl $0, %%edx \n\t" // test for bytes over mult of 64 - "jz up_end \n\t" - - "cmpl $8, %%edx \n\t" // test for less than 8 bytes - "jb up_lt8 \n\t" // [added by lcreeve@netins.net] - - "addl %%edx, %%ecx \n\t" - "andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8 - "subl %%edx, %%ecx \n\t" // drop over bytes from length - "jz up_lt8 \n\t" - - "up_lpA: \n\t" // use MMX regs to update 8 bytes sim. - "movq (%%esi,%%ebx,), %%mm1 \n\t" - "movq (%%edi,%%ebx,), %%mm0 \n\t" - "addl $8, %%ebx \n\t" - "paddb %%mm1, %%mm0 \n\t" - "cmpl %%ecx, %%ebx \n\t" - "movq %%mm0, -8(%%edi,%%ebx,) \n\t" // movq does not affect flags; -8 to - "jb up_lpA \n\t" // offset add ebx - "cmpl $0, %%edx \n\t" // test for bytes over mult of 8 - "jz up_end \n\t" - - "up_lt8: \n\t" - "xorl %%eax, %%eax \n\t" - "addl %%edx, %%ecx \n\t" // move over byte count into counter - - "up_lp2: \n\t" // use x86 regs for remaining bytes - "movb (%%edi,%%ebx,), %%al \n\t" - "addb (%%esi,%%ebx,), %%al \n\t" - "incl %%ebx \n\t" - "cmpl %%ecx, %%ebx \n\t" - "movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to - "jb up_lp2 \n\t" // offset inc ebx - - "up_end: \n\t" - "EMMS \n\t" // conversion of filtered row complete - - : "=d" (dummy_value_d), // 0 // output regs (dummy) - "=S" (dummy_value_S), // 1 - "=D" (dummy_value_D) // 2 - - : "0" (len), // edx // input regs - "1" (prev_row), // esi - "2" (row) // edi - - : "%eax", "%ebx", "%ecx" // clobber list (no input regs!) - -#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ - , "%mm0", "%mm1", "%mm2", "%mm3" - , "%mm4", "%mm5", "%mm6", "%mm7" -#endif - ); - -} // end of png_read_filter_row_mmx_up() - - - - -//===========================================================================// -// // -// P N G _ R E A D _ F I L T E R _ R O W // -// // -//===========================================================================// - -#if defined(PNG_HAVE_ASSEMBLER_READ_FILTER_ROW) - -// Optimized png_read_filter_row routines - -void /* PRIVATE */ -png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep - row, png_bytep prev_row, int filter) -{ -#ifdef PNG_DEBUG - char filnm[10]; -#endif - -/* GRR: these are superseded by png_ptr->asm_flags: */ -#define UseMMX_sub 1 // GRR: converted 20000730 -#define UseMMX_up 1 // GRR: converted 20000729 -#define UseMMX_avg 1 // GRR: converted 20000828 (+ 16-bit bugfix 20000916) -#define UseMMX_paeth 1 // GRR: converted 20000828 - - if (_mmx_supported == 2) { - png_mmx_support(); - } - -#ifdef PNG_DEBUG - png_debug(1, "in png_read_filter_row\n"); - switch (filter) - { - case 0: sprintf(filnm, "none"); - break; - case 1: sprintf(filnm, "sub-%s", "MMX"); - break; - case 2: sprintf(filnm, "up-%s", "MMX"); - break; - case 3: sprintf(filnm, "avg-%s", "MMX"); - break; - case 4: sprintf(filnm, "Paeth-%s", "MMX"); - break; - default: sprintf(filnm, "unknw"); - break; - } - png_debug2(0, "row_number=%5ld, %5s, ", png_ptr->row_number, filnm); - png_debug1(0, "row=0x%08lx, ", (unsigned long)row); - png_debug2(0, "pixdepth=%2d, bytes=%d, ", (int)row_info->pixel_depth, - (int)((row_info->pixel_depth + 7) >> 3)); - png_debug1(0,"rowbytes=%8ld\n", row_info->rowbytes); -#endif /* PNG_DEBUG */ - - switch (filter) - { - case PNG_FILTER_VALUE_NONE: - break; - - case PNG_FILTER_VALUE_SUB: - if ( - (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && - (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) - { - png_read_filter_row_mmx_sub(row_info, row); - } - else - { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_bytep rp = row + bpp; - png_bytep lp = row; - - for (i = bpp; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff); - rp++; - } - } //end !UseMMX_sub - break; - - case PNG_FILTER_VALUE_UP: - if ( - (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && - (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) - { - png_read_filter_row_mmx_up(row_info, row, prev_row); - } - else - { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_bytep rp = row; - png_bytep pp = prev_row; - - for (i = 0; i < istop; ++i) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); - rp++; - } - } //end !UseMMX_up - break; - - case PNG_FILTER_VALUE_AVG: - if ( - (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && - (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) - { - png_read_filter_row_mmx_avg(row_info, row, prev_row); - } - else - { - png_uint_32 i; - png_bytep rp = row; - png_bytep pp = prev_row; - png_bytep lp = row; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_uint_32 istop = row_info->rowbytes - bpp; - - for (i = 0; i < bpp; i++) - { - *rp = (png_byte)(((int)(*rp) + - ((int)(*pp++) >> 1)) & 0xff); - rp++; - } - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + - ((int)(*pp++ + *lp++) >> 1)) & 0xff); - rp++; - } - } //end !UseMMX_avg - break; - - case PNG_FILTER_VALUE_PAETH: - if ( - (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && - (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) - { - png_read_filter_row_mmx_paeth(row_info, row, prev_row); - } - else - { - png_uint_32 i; - png_bytep rp = row; - png_bytep pp = prev_row; - png_bytep lp = row; - png_bytep cp = prev_row; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_uint_32 istop = row_info->rowbytes - bpp; - - for (i = 0; i < bpp; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); - rp++; - } - - for (i = 0; i < istop; i++) /* use leftover rp,pp */ - { - int a, b, c, pa, pb, pc, p; - - a = *lp++; - b = *pp++; - c = *cp++; - - p = b - c; - pc = a - c; - -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - - /* - if (pa <= pb && pa <= pc) - p = a; - else if (pb <= pc) - p = b; - else - p = c; - */ - - p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c; - - *rp = (png_byte)(((int)(*rp) + p) & 0xff); - rp++; - } - } //end !UseMMX_paeth - break; - - default: - png_warning(png_ptr, "Ignoring bad row-filter type"); - *row=0; - break; - } -} - -#endif /* PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */ - - - - -//===========================================================================// -// // -// P N G _ M M X _ S U P P O R T // -// // -//===========================================================================// - -// GRR NOTES: (1) the following code assumes 386 or better (pushfl/popfl) -// (2) all instructions compile with gcc 2.7.2.3 and later -// (3) the function is moved down here to prevent gcc from -// inlining it in multiple places and then barfing be- -// cause the ".NOT_SUPPORTED" label is multiply defined -// [is there a way to signal that a *single* function should -// not be inlined? is there a way to modify the label for -// each inlined instance, e.g., by appending _1, _2, etc.? -// maybe if don't use leading "." in label name? (nope...sigh)] - -// GRR TO DO: make sure PNGAPI doesn't do/require anything screwy here -// [looks OK for everybody except possibly Cygwin (__cdecl)] - -int PNGAPI -png_mmx_support(void) -{ - __asm__ __volatile__ ( - "pushl %%ebx \n\t" // ebx gets clobbered by CPUID instruction - "pushl %%ecx \n\t" // so does ecx... - "pushl %%edx \n\t" // ...and edx (but ecx & edx safe on Linux) -// ".byte 0x66 \n\t" // convert 16-bit pushf to 32-bit pushfd -// "pushf \n\t" // 16-bit pushf - "pushfl \n\t" // save Eflag to stack - "popl %%eax \n\t" // get Eflag from stack into eax - "movl %%eax, %%ecx \n\t" // make another copy of Eflag in ecx - "xorl $0x200000, %%eax \n\t" // toggle ID bit in Eflag (i.e., bit 21) - "pushl %%eax \n\t" // save modified Eflag back to stack -// ".byte 0x66 \n\t" // convert 16-bit popf to 32-bit popfd -// "popf \n\t" // 16-bit popf - "popfl \n\t" // restore modified value to Eflag reg - "pushfl \n\t" // save Eflag to stack - "popl %%eax \n\t" // get Eflag from stack - "xorl %%ecx, %%eax \n\t" // compare new Eflag with original Eflag - "jz .NOT_SUPPORTED \n\t" // if same, CPUID instr. is not supported - - "xorl %%eax, %%eax \n\t" // set eax to zero -// ".byte 0x0f, 0xa2 \n\t" // CPUID instruction (two-byte opcode) - "cpuid \n\t" // get the CPU identification info - "cmpl $1, %%eax \n\t" // make sure eax return non-zero value - "jl .NOT_SUPPORTED \n\t" // if eax is zero, MMX is not supported - - "xorl %%eax, %%eax \n\t" // set eax to zero and... - "incl %%eax \n\t" // ...increment eax to 1. This pair is - // faster than the instruction "mov eax, 1" - "cpuid \n\t" // get the CPU identification info again - "andl $0x800000, %%edx \n\t" // mask out all bits but MMX bit (23) - "cmpl $0, %%edx \n\t" // 0 = MMX not supported - "jz .NOT_SUPPORTED \n\t" // non-zero = yes, MMX IS supported - - "movl $1, %%eax \n\t" // set return value to 1 - "movl %%eax, _mmx_supported \n\t" // save in global static variable, too - "popl %%edx \n\t" // restore edx - "popl %%ecx \n\t" // restore ecx - "popl %%ebx \n\t" // restore ebx ("row" in png_do_interlace) - "ret \n\t" // DONE: have MMX support - - ".NOT_SUPPORTED: \n\t" // target label for jump instructions - "movl $0, %%eax \n\t" // set return value to 0 - "movl %%eax, _mmx_supported \n\t" // save in global static variable, too - "popl %%edx \n\t" // restore edx - "popl %%ecx \n\t" // restore ecx - "popl %%ebx \n\t" // restore ebx ("row" in png_do_interlace) -// "ret \n\t" // DONE: no MMX support - // (fall through to standard C "ret") - - : // output list (none) - - : // any variables used on input (none) - - : "%eax" // clobber list -// , "%ebx", "%ecx", "%edx" // GRR: we handle these manually -// , "memory" // if write to a variable gcc thought was in a reg -// , "cc" // "condition codes" (flag bits) - ); - - // return %%eax; -} - -#endif /* PNG_ASSEMBLER_CODE_SUPPORTED && PNG_USE_PNGGCCRD */ diff --git a/libraries/libpng-1.0.9/pngget.c b/libraries/libpng-1.0.9/pngget.c deleted file mode 100644 index 3cd6d85..0000000 --- a/libraries/libpng-1.0.9/pngget.c +++ /dev/null @@ -1,828 +0,0 @@ - -/* pngget.c - retrieval of values from info struct - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - */ - -#define PNG_INTERNAL -#include "png.h" - -png_uint_32 PNGAPI -png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag) -{ - if (png_ptr != NULL && info_ptr != NULL) - return(info_ptr->valid & flag); - else - return(0); -} - -png_uint_32 PNGAPI -png_get_rowbytes(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - return(info_ptr->rowbytes); - else - return(0); -} - -#if defined(PNG_INFO_IMAGE_SUPPORTED) -png_bytepp PNGAPI -png_get_rows(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - return(info_ptr->row_pointers); - else - return(0); -} -#endif - -#ifdef PNG_EASY_ACCESS_SUPPORTED -/* easy access to info, added in libpng-0.99 */ -png_uint_32 PNGAPI -png_get_image_width(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->width; - } - return (0); -} - -png_uint_32 PNGAPI -png_get_image_height(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->height; - } - return (0); -} - -png_byte PNGAPI -png_get_bit_depth(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->bit_depth; - } - return (0); -} - -png_byte PNGAPI -png_get_color_type(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->color_type; - } - return (0); -} - -png_byte PNGAPI -png_get_filter_type(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->filter_type; - } - return (0); -} - -png_byte PNGAPI -png_get_interlace_type(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->interlace_type; - } - return (0); -} - -png_byte PNGAPI -png_get_compression_type(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->compression_type; - } - return (0); -} - -png_uint_32 PNGAPI -png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) -#if defined(PNG_pHYs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_pHYs) - { - png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter"); - if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER) - return (0); - else return (info_ptr->x_pixels_per_unit); - } -#else - return (0); -#endif - return (0); -} - -png_uint_32 PNGAPI -png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) -#if defined(PNG_pHYs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_pHYs) - { - png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter"); - if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER) - return (0); - else return (info_ptr->y_pixels_per_unit); - } -#else - return (0); -#endif - return (0); -} - -png_uint_32 PNGAPI -png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) -#if defined(PNG_pHYs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_pHYs) - { - png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter"); - if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER || - info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit) - return (0); - else return (info_ptr->x_pixels_per_unit); - } -#else - return (0); -#endif - return (0); -} - -#ifdef PNG_FLOATING_POINT_SUPPORTED -float PNGAPI -png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr) - { - if (png_ptr != NULL && info_ptr != NULL) -#if defined(PNG_pHYs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_pHYs) - { - png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio"); - if (info_ptr->x_pixels_per_unit == 0) - return ((float)0.0); - else - return ((float)((float)info_ptr->y_pixels_per_unit - /(float)info_ptr->x_pixels_per_unit)); - } -#else - return (0.0); -#endif - return ((float)0.0); -} -#endif - -png_int_32 PNGAPI -png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) -#if defined(PNG_oFFs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_oFFs) - { - png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns"); - if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) - return (0); - else return (info_ptr->x_offset); - } -#else - return (0); -#endif - return (0); -} - -png_int_32 PNGAPI -png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) -#if defined(PNG_oFFs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_oFFs) - { - png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns"); - if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) - return (0); - else return (info_ptr->y_offset); - } -#else - return (0); -#endif - return (0); -} - -png_int_32 PNGAPI -png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) -#if defined(PNG_oFFs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_oFFs) - { - png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns"); - if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) - return (0); - else return (info_ptr->x_offset); - } -#else - return (0); -#endif - return (0); -} - -png_int_32 PNGAPI -png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) -#if defined(PNG_oFFs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_oFFs) - { - png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns"); - if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) - return (0); - else return (info_ptr->y_offset); - } -#else - return (0); -#endif - return (0); -} - -#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED) -png_uint_32 PNGAPI -png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) -{ - return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr) - *.0254 +.5)); -} - -png_uint_32 PNGAPI -png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) -{ - return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr) - *.0254 +.5)); -} - -png_uint_32 PNGAPI -png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) -{ - return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr) - *.0254 +.5)); -} - -float PNGAPI -png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr) -{ - return ((float)png_get_x_offset_microns(png_ptr, info_ptr) - *.00003937); -} - -float PNGAPI -png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr) -{ - return ((float)png_get_y_offset_microns(png_ptr, info_ptr) - *.00003937); -} - -#if defined(PNG_READ_pHYs_SUPPORTED) -png_uint_32 PNGAPI -png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) -{ - png_uint_32 retval = 0; - - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) - { - png_debug1(1, "in %s retrieval function\n", "pHYs"); - if (res_x != NULL) - { - *res_x = info_ptr->x_pixels_per_unit; - retval |= PNG_INFO_pHYs; - } - if (res_y != NULL) - { - *res_y = info_ptr->y_pixels_per_unit; - retval |= PNG_INFO_pHYs; - } - if (unit_type != NULL) - { - *unit_type = (int)info_ptr->phys_unit_type; - retval |= PNG_INFO_pHYs; - if(*unit_type == 1) - { - if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50); - if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50); - } - } - } - return (retval); -} -#endif /* PNG_READ_pHYs_SUPPORTED */ -#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */ - -/* png_get_channels really belongs in here, too, but it's been around longer */ - -#endif /* PNG_EASY_ACCESS_SUPPORTED */ - -png_byte PNGAPI -png_get_channels(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - return(info_ptr->channels); - else - return (0); -} - -png_bytep PNGAPI -png_get_signature(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - return(info_ptr->signature); - else - return (NULL); -} - -#if defined(PNG_READ_bKGD_SUPPORTED) -png_uint_32 PNGAPI -png_get_bKGD(png_structp png_ptr, png_infop info_ptr, - png_color_16p *background) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) - && background != NULL) - { - png_debug1(1, "in %s retrieval function\n", "bKGD"); - *background = &(info_ptr->background); - return (PNG_INFO_bKGD); - } - return (0); -} -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -png_uint_32 PNGAPI -png_get_cHRM(png_structp png_ptr, png_infop info_ptr, - double *white_x, double *white_y, double *red_x, double *red_y, - double *green_x, double *green_y, double *blue_x, double *blue_y) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) - { - png_debug1(1, "in %s retrieval function\n", "cHRM"); - if (white_x != NULL) - *white_x = (double)info_ptr->x_white; - if (white_y != NULL) - *white_y = (double)info_ptr->y_white; - if (red_x != NULL) - *red_x = (double)info_ptr->x_red; - if (red_y != NULL) - *red_y = (double)info_ptr->y_red; - if (green_x != NULL) - *green_x = (double)info_ptr->x_green; - if (green_y != NULL) - *green_y = (double)info_ptr->y_green; - if (blue_x != NULL) - *blue_x = (double)info_ptr->x_blue; - if (blue_y != NULL) - *blue_y = (double)info_ptr->y_blue; - return (PNG_INFO_cHRM); - } - return (0); -} -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -png_uint_32 PNGAPI -png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, - png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x, - png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y, - png_fixed_point *blue_x, png_fixed_point *blue_y) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) - { - png_debug1(1, "in %s retrieval function\n", "cHRM"); - if (white_x != NULL) - *white_x = info_ptr->int_x_white; - if (white_y != NULL) - *white_y = info_ptr->int_y_white; - if (red_x != NULL) - *red_x = info_ptr->int_x_red; - if (red_y != NULL) - *red_y = info_ptr->int_y_red; - if (green_x != NULL) - *green_x = info_ptr->int_x_green; - if (green_y != NULL) - *green_y = info_ptr->int_y_green; - if (blue_x != NULL) - *blue_x = info_ptr->int_x_blue; - if (blue_y != NULL) - *blue_y = info_ptr->int_y_blue; - return (PNG_INFO_cHRM); - } - return (0); -} -#endif -#endif - -#if defined(PNG_READ_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -png_uint_32 PNGAPI -png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) - && file_gamma != NULL) - { - png_debug1(1, "in %s retrieval function\n", "gAMA"); - *file_gamma = (double)info_ptr->gamma; - return (PNG_INFO_gAMA); - } - return (0); -} -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -png_uint_32 PNGAPI -png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, - png_fixed_point *int_file_gamma) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) - && int_file_gamma != NULL) - { - png_debug1(1, "in %s retrieval function\n", "gAMA"); - *int_file_gamma = info_ptr->int_gamma; - return (PNG_INFO_gAMA); - } - return (0); -} -#endif -#endif - -#if defined(PNG_READ_sRGB_SUPPORTED) -png_uint_32 PNGAPI -png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) - && file_srgb_intent != NULL) - { - png_debug1(1, "in %s retrieval function\n", "sRGB"); - *file_srgb_intent = (int)info_ptr->srgb_intent; - return (PNG_INFO_sRGB); - } - return (0); -} -#endif - -#if defined(PNG_READ_iCCP_SUPPORTED) -png_uint_32 PNGAPI -png_get_iCCP(png_structp png_ptr, png_infop info_ptr, - png_charpp name, int *compression_type, - png_charpp profile, png_uint_32 *proflen) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP) - && name != NULL && profile != NULL && proflen != NULL) - { - png_debug1(1, "in %s retrieval function\n", "iCCP"); - *name = info_ptr->iccp_name; - *profile = info_ptr->iccp_profile; - /* compression_type is a dummy so the API won't have to change - if we introduce multiple compression types later. */ - *proflen = (int)info_ptr->iccp_proflen; - *compression_type = (int)info_ptr->iccp_compression; - return (PNG_INFO_iCCP); - } - return (0); -} -#endif - -#if defined(PNG_READ_sPLT_SUPPORTED) -png_uint_32 PNGAPI -png_get_sPLT(png_structp png_ptr, png_infop info_ptr, - png_sPLT_tpp spalettes) -{ - if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) - *spalettes = info_ptr->splt_palettes; - return ((png_uint_32)info_ptr->splt_palettes_num); -} -#endif - -#if defined(PNG_READ_hIST_SUPPORTED) -png_uint_32 PNGAPI -png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) - && hist != NULL) - { - png_debug1(1, "in %s retrieval function\n", "hIST"); - *hist = info_ptr->hist; - return (PNG_INFO_hIST); - } - return (0); -} -#endif - -png_uint_32 PNGAPI -png_get_IHDR(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *width, png_uint_32 *height, int *bit_depth, - int *color_type, int *interlace_type, int *compression_type, - int *filter_type) - -{ - if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL && - bit_depth != NULL && color_type != NULL) - { - int pixel_depth, channels; - png_uint_32 rowbytes_per_pixel; - - png_debug1(1, "in %s retrieval function\n", "IHDR"); - *width = info_ptr->width; - *height = info_ptr->height; - *bit_depth = info_ptr->bit_depth; - *color_type = info_ptr->color_type; - if (compression_type != NULL) - *compression_type = info_ptr->compression_type; - if (filter_type != NULL) - *filter_type = info_ptr->filter_type; - if (interlace_type != NULL) - *interlace_type = info_ptr->interlace_type; - - /* check for potential overflow of rowbytes */ - if (*color_type == PNG_COLOR_TYPE_PALETTE) - channels = 1; - else if (*color_type & PNG_COLOR_MASK_COLOR) - channels = 3; - else - channels = 1; - if (*color_type & PNG_COLOR_MASK_ALPHA) - channels++; - pixel_depth = *bit_depth * channels; - rowbytes_per_pixel = (pixel_depth + 7) >> 3; - if ((*width > PNG_MAX_UINT/rowbytes_per_pixel)) - { - png_warning(png_ptr, - "Width too large for libpng to process image data."); - } - return (1); - } - return (0); -} - -#if defined(PNG_READ_oFFs_SUPPORTED) -png_uint_32 PNGAPI -png_get_oFFs(png_structp png_ptr, png_infop info_ptr, - png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) - && offset_x != NULL && offset_y != NULL && unit_type != NULL) - { - png_debug1(1, "in %s retrieval function\n", "oFFs"); - *offset_x = info_ptr->x_offset; - *offset_y = info_ptr->y_offset; - *unit_type = (int)info_ptr->offset_unit_type; - return (PNG_INFO_oFFs); - } - return (0); -} -#endif - -#if defined(PNG_READ_pCAL_SUPPORTED) -png_uint_32 PNGAPI -png_get_pCAL(png_structp png_ptr, png_infop info_ptr, - png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, - png_charp *units, png_charpp *params) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL) - && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && - nparams != NULL && units != NULL && params != NULL) - { - png_debug1(1, "in %s retrieval function\n", "pCAL"); - *purpose = info_ptr->pcal_purpose; - *X0 = info_ptr->pcal_X0; - *X1 = info_ptr->pcal_X1; - *type = (int)info_ptr->pcal_type; - *nparams = (int)info_ptr->pcal_nparams; - *units = info_ptr->pcal_units; - *params = info_ptr->pcal_params; - return (PNG_INFO_pCAL); - } - return (0); -} -#endif - -#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -png_uint_32 PNGAPI -png_get_sCAL(png_structp png_ptr, png_infop info_ptr, - int *unit, double *width, double *height) -{ - if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_sCAL)) - { - *unit = info_ptr->scal_unit; - *width = info_ptr->scal_pixel_width; - *height = info_ptr->scal_pixel_height; - return (PNG_INFO_sCAL); - } - return(0); -} -#else -#ifdef PNG_FIXED_POINT_SUPPORTED -png_uint_32 PNGAPI -png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr, - int *unit, png_charpp width, png_charpp height) -{ - if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_sCAL)) - { - *unit = info_ptr->scal_unit; - *width = info_ptr->scal_s_width; - *height = info_ptr->scal_s_height; - return (PNG_INFO_sCAL); - } - return(0); -} -#endif -#endif -#endif - -#if defined(PNG_READ_pHYs_SUPPORTED) -png_uint_32 PNGAPI -png_get_pHYs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) -{ - png_uint_32 retval = 0; - - if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_pHYs)) - { - png_debug1(1, "in %s retrieval function\n", "pHYs"); - if (res_x != NULL) - { - *res_x = info_ptr->x_pixels_per_unit; - retval |= PNG_INFO_pHYs; - } - if (res_y != NULL) - { - *res_y = info_ptr->y_pixels_per_unit; - retval |= PNG_INFO_pHYs; - } - if (unit_type != NULL) - { - *unit_type = (int)info_ptr->phys_unit_type; - retval |= PNG_INFO_pHYs; - } - } - return (retval); -} -#endif - -png_uint_32 PNGAPI -png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette, - int *num_palette) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE) - && palette != NULL) - { - png_debug1(1, "in %s retrieval function\n", "PLTE"); - *palette = info_ptr->palette; - *num_palette = info_ptr->num_palette; - png_debug1(3, "num_palette = %d\n", *num_palette); - return (PNG_INFO_PLTE); - } - return (0); -} - -#if defined(PNG_READ_sBIT_SUPPORTED) -png_uint_32 PNGAPI -png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT) - && sig_bit != NULL) - { - png_debug1(1, "in %s retrieval function\n", "sBIT"); - *sig_bit = &(info_ptr->sig_bit); - return (PNG_INFO_sBIT); - } - return (0); -} -#endif - -#if defined(PNG_READ_TEXT_SUPPORTED) -png_uint_32 PNGAPI -png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr, - int *num_text) -{ - if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) - { - png_debug1(1, "in %s retrieval function\n", - (png_ptr->chunk_name[0] == '\0' ? "text" - : (png_const_charp)png_ptr->chunk_name)); - if (text_ptr != NULL) - *text_ptr = info_ptr->text; - if (num_text != NULL) - *num_text = info_ptr->num_text; - return ((png_uint_32)info_ptr->num_text); - } - if (num_text != NULL) - *num_text = 0; - return(0); -} -#endif - -#if defined(PNG_READ_tIME_SUPPORTED) -png_uint_32 PNGAPI -png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME) - && mod_time != NULL) - { - png_debug1(1, "in %s retrieval function\n", "tIME"); - *mod_time = &(info_ptr->mod_time); - return (PNG_INFO_tIME); - } - return (0); -} -#endif - -#if defined(PNG_READ_tRNS_SUPPORTED) -png_uint_32 PNGAPI -png_get_tRNS(png_structp png_ptr, png_infop info_ptr, - png_bytep *trans, int *num_trans, png_color_16p *trans_values) -{ - png_uint_32 retval = 0; - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) - { - png_debug1(1, "in %s retrieval function\n", "tRNS"); - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (trans != NULL) - { - *trans = info_ptr->trans; - retval |= PNG_INFO_tRNS; - } - if (trans_values != NULL) - *trans_values = &(info_ptr->trans_values); - } - else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */ - { - if (trans_values != NULL) - { - *trans_values = &(info_ptr->trans_values); - retval |= PNG_INFO_tRNS; - } - if(trans != NULL) - *trans = NULL; - } - if(num_trans != NULL) - { - *num_trans = info_ptr->num_trans; - retval |= PNG_INFO_tRNS; - } - } - return (retval); -} -#endif - -#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) -png_uint_32 PNGAPI -png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, - png_unknown_chunkpp unknowns) -{ - if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) - *unknowns = info_ptr->unknown_chunks; - return ((png_uint_32)info_ptr->unknown_chunks_num); -} -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) -png_byte PNGAPI -png_get_rgb_to_gray_status (png_structp png_ptr) -{ - return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0); -} -#endif - -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) -png_voidp PNGAPI -png_get_user_chunk_ptr(png_structp png_ptr) -{ - return (png_ptr? png_ptr->user_chunk_ptr : NULL); -} -#endif - - -png_uint_32 PNGAPI -png_get_compression_buffer_size(png_structp png_ptr) -{ - return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L); -} - diff --git a/libraries/libpng-1.0.9/pngmem.c b/libraries/libpng-1.0.9/pngmem.c deleted file mode 100644 index 84ef17a..0000000 --- a/libraries/libpng-1.0.9/pngmem.c +++ /dev/null @@ -1,503 +0,0 @@ - -/* pngmem.c - stub functions for memory allocation - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This file provides a location for all memory allocation. Users who - * need special memory handling are expected to supply replacement - * functions for png_malloc() and png_free(), and to use - * png_create_read_struct_2() and png_create_write_struct_2() to - * identify the replacement functions. - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Borland DOS special memory handler */ -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* if you change this, be sure to change the one in png.h also */ - -/* Allocate memory for a png_struct. The malloc and memset can be replaced - by a single call to calloc() if this is thought to improve performance. */ -png_voidp /* PRIVATE */ -png_create_struct(int type) -{ -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL)); -} - -/* Alternate version of png_create_struct, for use with user-defined malloc. */ -png_voidp /* PRIVATE */ -png_create_struct_2(int type, png_malloc_ptr malloc_fn) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = sizeof(png_info); - else if (type == PNG_STRUCT_PNG) - size = sizeof(png_struct); - else - return ((png_voidp)NULL); - -#ifdef PNG_USER_MEM_SUPPORTED - if(malloc_fn != NULL) - { - if ((struct_ptr = (*(malloc_fn))(NULL, size)) != NULL) - png_memset(struct_ptr, 0, size); - return (struct_ptr); - } -#endif /* PNG_USER_MEM_SUPPORTED */ - if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL) - { - png_memset(struct_ptr, 0, size); - } - return (struct_ptr); -} - - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) -{ -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, (png_free_ptr)NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn) -{ -#endif - if (struct_ptr != NULL) - { -#ifdef PNG_USER_MEM_SUPPORTED - if(free_fn != NULL) - { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - (*(free_fn))(png_ptr, struct_ptr); - return; - } -#endif /* PNG_USER_MEM_SUPPORTED */ - farfree (struct_ptr); - } -} - -/* Allocate memory. For reasonable files, size should never exceed - * 64K. However, zlib may allocate more then 64K if you don't tell - * it not to. See zconf.h and png.h for more information. zlib does - * need to allocate exactly 64K, so whatever you call here must - * have the ability to do that. - * - * Borland seems to have a problem in DOS mode for exactly 64K. - * It gives you a segment with an offset of 8 (perhaps to store its - * memory stuff). zlib doesn't like this at all, so we have to - * detect and deal with it. This code should not be needed in - * Windows or OS/2 modes, and only in 16 bit mode. This code has - * been updated by Alexander Lehmann for version 0.89 to waste less - * memory. - * - * Note that we can't use png_size_t for the "size" declaration, - * since on some systems a png_size_t is a 16-bit quantity, and as a - * result, we would be truncating potentially larger memory requests - * (which should cause a fatal error) and introducing major problems. - */ -png_voidp PNGAPI -png_malloc(png_structp png_ptr, png_uint_32 size) -{ -#ifndef PNG_USER_MEM_SUPPORTED - png_voidp ret; -#endif - if (png_ptr == NULL || size == 0) - return ((png_voidp)NULL); - -#ifdef PNG_USER_MEM_SUPPORTED - if(png_ptr->malloc_fn != NULL) - return ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size)); - else - return png_malloc_default(png_ptr, size); -} - -png_voidp PNGAPI -png_malloc_default(png_structp png_ptr, png_uint_32 size) -{ - png_voidp ret; -#endif /* PNG_USER_MEM_SUPPORTED */ - -#ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) - png_error(png_ptr, "Cannot Allocate > 64K"); -#endif - - if (size == (png_uint_32)65536L) - { - if (png_ptr->offset_table == NULL) - { - /* try to see if we need to do any of this fancy stuff */ - ret = farmalloc(size); - if (ret == NULL || ((png_size_t)ret & 0xffff)) - { - int num_blocks; - png_uint_32 total_size; - png_bytep table; - int i; - png_byte huge * hptr; - - if (ret != NULL) - { - farfree(ret); - ret = NULL; - } - - if(png_ptr->zlib_window_bits > 14) - num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14)); - else - num_blocks = 1; - if (png_ptr->zlib_mem_level >= 7) - num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7)); - else - num_blocks++; - - total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16; - - table = farmalloc(total_size); - - if (table == NULL) - { - png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */ - } - - if ((png_size_t)table & 0xfff0) - { - png_error(png_ptr, "Farmalloc didn't return normalized pointer"); - } - - png_ptr->offset_table = table; - png_ptr->offset_table_ptr = farmalloc(num_blocks * - sizeof (png_bytep)); - - if (png_ptr->offset_table_ptr == NULL) - { - png_error(png_ptr, "Out Of memory."); - } - - hptr = (png_byte huge *)table; - if ((png_size_t)hptr & 0xf) - { - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */ - } - for (i = 0; i < num_blocks; i++) - { - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */ - } - - png_ptr->offset_table_number = num_blocks; - png_ptr->offset_table_count = 0; - png_ptr->offset_table_count_free = 0; - } - } - - if (png_ptr->offset_table_count >= png_ptr->offset_table_number) - png_error(png_ptr, "Out of Memory."); - - ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; - } - else - ret = farmalloc(size); - - if (ret == NULL) - { - png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */ - } - - return (ret); -} - -/* free a pointer allocated by png_malloc(). In the default - configuration, png_ptr is not used, but is passed in case it - is needed. If ptr is NULL, return without taking any action. */ -void PNGAPI -png_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -#ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; - } - else png_free_default(png_ptr, ptr); -} - -void PNGAPI -png_free_default(png_structp png_ptr, png_voidp ptr) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr->offset_table != NULL) - { - int i; - - for (i = 0; i < png_ptr->offset_table_count; i++) - { - if (ptr == png_ptr->offset_table_ptr[i]) - { - ptr = NULL; - png_ptr->offset_table_count_free++; - break; - } - } - if (png_ptr->offset_table_count_free == png_ptr->offset_table_count) - { - farfree(png_ptr->offset_table); - farfree(png_ptr->offset_table_ptr); - png_ptr->offset_table = NULL; - png_ptr->offset_table_ptr = NULL; - } - } - - if (ptr != NULL) - { - farfree(ptr); - } -} - -#else /* Not the Borland DOS special memory handler */ - -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably.*/ -png_voidp /* PRIVATE */ -png_create_struct(int type) -{ -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL)); -} - -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably.*/ -png_voidp /* PRIVATE */ -png_create_struct_2(int type, png_malloc_ptr malloc_fn) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = sizeof(png_info); - else if (type == PNG_STRUCT_PNG) - size = sizeof(png_struct); - else - return ((png_voidp)NULL); - -#ifdef PNG_USER_MEM_SUPPORTED - if(malloc_fn != NULL) - { - if ((struct_ptr = (*(malloc_fn))(NULL, size)) != NULL) - png_memset(struct_ptr, 0, size); - return (struct_ptr); - } -#endif /* PNG_USER_MEM_SUPPORTED */ - -#if defined(__TURBOC__) && !defined(__FLAT__) - if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL) -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - if ((struct_ptr = (png_voidp)halloc(size,1)) != NULL) -# else - if ((struct_ptr = (png_voidp)malloc(size)) != NULL) -# endif -#endif - { - png_memset(struct_ptr, 0, size); - } - - return (struct_ptr); -} - - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) -{ -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, (png_free_ptr)NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - if (struct_ptr != NULL) - { -#ifdef PNG_USER_MEM_SUPPORTED - if(free_fn != NULL) - { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - (*(free_fn))(png_ptr, struct_ptr); - return; - } -#endif /* PNG_USER_MEM_SUPPORTED */ -#if defined(__TURBOC__) && !defined(__FLAT__) - farfree(struct_ptr); -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(struct_ptr); -# else - free(struct_ptr); -# endif -#endif - } -} - - -/* Allocate memory. For reasonable files, size should never exceed - 64K. However, zlib may allocate more then 64K if you don't tell - it not to. See zconf.h and png.h for more information. zlib does - need to allocate exactly 64K, so whatever you call here must - have the ability to do that. */ - -png_voidp PNGAPI -png_malloc(png_structp png_ptr, png_uint_32 size) -{ -#ifndef PNG_USER_MEM_SUPPORTED - png_voidp ret; -#endif - if (png_ptr == NULL || size == 0) - return ((png_voidp)NULL); - -#ifdef PNG_USER_MEM_SUPPORTED - if(png_ptr->malloc_fn != NULL) - return ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size)); - else - return (png_malloc_default(png_ptr, size)); -} -png_voidp /* PRIVATE */ -png_malloc_default(png_structp png_ptr, png_uint_32 size) -{ - png_voidp ret; -#endif /* PNG_USER_MEM_SUPPORTED */ - -#ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) - png_error(png_ptr, "Cannot Allocate > 64K"); -#endif - -#if defined(__TURBOC__) && !defined(__FLAT__) - ret = farmalloc(size); -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - ret = halloc(size, 1); -# else - ret = malloc((size_t)size); -# endif -#endif - - if (ret == NULL) - { - png_error(png_ptr, "Out of Memory"); - } - - return (ret); -} - -/* Free a pointer allocated by png_malloc(). If ptr is NULL, return - without taking any action. */ -void PNGAPI -png_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -#ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; - } - else png_free_default(png_ptr, ptr); -} -void /* PRIVATE */ -png_free_default(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -#endif /* PNG_USER_MEM_SUPPORTED */ - -#if defined(__TURBOC__) && !defined(__FLAT__) - farfree(ptr); -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(ptr); -# else - free(ptr); -# endif -#endif -} - -#endif /* Not Borland DOS special memory handler */ - -png_voidp /* PRIVATE */ -png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2, - png_uint_32 length) -{ - png_size_t size; - - size = (png_size_t)length; - if ((png_uint_32)size != length) - png_error(png_ptr,"Overflow in png_memcpy_check."); - - return(png_memcpy (s1, s2, size)); -} - -png_voidp /* PRIVATE */ -png_memset_check (png_structp png_ptr, png_voidp s1, int value, - png_uint_32 length) -{ - png_size_t size; - - size = (png_size_t)length; - if ((png_uint_32)size != length) - png_error(png_ptr,"Overflow in png_memset_check."); - - return (png_memset (s1, value, size)); - -} - -#ifdef PNG_USER_MEM_SUPPORTED -/* This function is called when the application wants to use another method - * of allocating and freeing memory. - */ -void PNGAPI -png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr - malloc_fn, png_free_ptr free_fn) -{ - png_ptr->mem_ptr = mem_ptr; - png_ptr->malloc_fn = malloc_fn; - png_ptr->free_fn = free_fn; -} - -/* This function returns a pointer to the mem_ptr associated with the user - * functions. The application should free any memory associated with this - * pointer before png_write_destroy and png_read_destroy are called. - */ -png_voidp PNGAPI -png_get_mem_ptr(png_structp png_ptr) -{ - return ((png_voidp)png_ptr->mem_ptr); -} -#endif /* PNG_USER_MEM_SUPPORTED */ diff --git a/libraries/libpng-1.0.9/pngnow.png b/libraries/libpng-1.0.9/pngnow.png deleted file mode 100644 index 4b5c9ac..0000000 Binary files a/libraries/libpng-1.0.9/pngnow.png and /dev/null differ diff --git a/libraries/libpng-1.0.9/pngpread.c b/libraries/libpng-1.0.9/pngpread.c deleted file mode 100644 index 9088b53..0000000 --- a/libraries/libpng-1.0.9/pngpread.c +++ /dev/null @@ -1,1487 +0,0 @@ - -/* pngpread.c - read a png file in push mode - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - */ - -#define PNG_INTERNAL -#include "png.h" - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED - -/* push model modes */ -#define PNG_READ_SIG_MODE 0 -#define PNG_READ_CHUNK_MODE 1 -#define PNG_READ_IDAT_MODE 2 -#define PNG_SKIP_MODE 3 -#define PNG_READ_tEXt_MODE 4 -#define PNG_READ_zTXt_MODE 5 -#define PNG_READ_DONE_MODE 6 -#define PNG_READ_iTXt_MODE 7 -#define PNG_ERROR_MODE 8 - -void PNGAPI -png_process_data(png_structp png_ptr, png_infop info_ptr, - png_bytep buffer, png_size_t buffer_size) -{ - png_push_restore_buffer(png_ptr, buffer, buffer_size); - - while (png_ptr->buffer_size) - { - png_process_some_data(png_ptr, info_ptr); - } -} - -/* What we do with the incoming data depends on what we were previously - * doing before we ran out of data... - */ -void /* PRIVATE */ -png_process_some_data(png_structp png_ptr, png_infop info_ptr) -{ - switch (png_ptr->process_mode) - { - case PNG_READ_SIG_MODE: - { - png_push_read_sig(png_ptr, info_ptr); - break; - } - case PNG_READ_CHUNK_MODE: - { - png_push_read_chunk(png_ptr, info_ptr); - break; - } - case PNG_READ_IDAT_MODE: - { - png_push_read_IDAT(png_ptr); - break; - } -#if defined(PNG_READ_tEXt_SUPPORTED) - case PNG_READ_tEXt_MODE: - { - png_push_read_tEXt(png_ptr, info_ptr); - break; - } -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - case PNG_READ_zTXt_MODE: - { - png_push_read_zTXt(png_ptr, info_ptr); - break; - } -#endif -#if defined(PNG_READ_iTXt_SUPPORTED) - case PNG_READ_iTXt_MODE: - { - png_push_read_iTXt(png_ptr, info_ptr); - break; - } -#endif - case PNG_SKIP_MODE: - { - png_push_crc_finish(png_ptr); - break; - } - default: - { - png_ptr->buffer_size = 0; - break; - } - } -} - -/* Read any remaining signature bytes from the stream and compare them with - * the correct PNG signature. It is possible that this routine is called - * with bytes already read from the signature, either because they have been - * checked by the calling application, or because of multiple calls to this - * routine. - */ -void /* PRIVATE */ -png_push_read_sig(png_structp png_ptr, png_infop info_ptr) -{ - png_size_t num_checked = png_ptr->sig_bytes, - num_to_check = 8 - num_checked; - - if (png_ptr->buffer_size < num_to_check) - { - num_to_check = png_ptr->buffer_size; - } - - png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]), - num_to_check); - png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes+num_to_check); - - if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) - { - if (num_checked < 4 && - png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) - png_error(png_ptr, "Not a PNG file"); - else - png_error(png_ptr, "PNG file corrupted by ASCII conversion"); - } - else - { - if (png_ptr->sig_bytes >= 8) - { - png_ptr->process_mode = PNG_READ_CHUNK_MODE; - } - } -} - -void /* PRIVATE */ -png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IHDR; - PNG_IDAT; - PNG_IEND; - PNG_PLTE; -#if defined(PNG_READ_bKGD_SUPPORTED) - PNG_bKGD; -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) - PNG_cHRM; -#endif -#if defined(PNG_READ_gAMA_SUPPORTED) - PNG_gAMA; -#endif -#if defined(PNG_READ_hIST_SUPPORTED) - PNG_hIST; -#endif -#if defined(PNG_READ_iCCP_SUPPORTED) - PNG_iCCP; -#endif -#if defined(PNG_READ_iTXt_SUPPORTED) - PNG_iTXt; -#endif -#if defined(PNG_READ_oFFs_SUPPORTED) - PNG_oFFs; -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - PNG_pCAL; -#endif -#if defined(PNG_READ_pHYs_SUPPORTED) - PNG_pHYs; -#endif -#if defined(PNG_READ_sBIT_SUPPORTED) - PNG_sBIT; -#endif -#if defined(PNG_READ_sCAL_SUPPORTED) - PNG_sCAL; -#endif -#if defined(PNG_READ_sRGB_SUPPORTED) - PNG_sRGB; -#endif -#if defined(PNG_READ_sPLT_SUPPORTED) - PNG_sPLT; -#endif -#if defined(PNG_READ_tEXt_SUPPORTED) - PNG_tEXt; -#endif -#if defined(PNG_READ_tIME_SUPPORTED) - PNG_tIME; -#endif -#if defined(PNG_READ_tRNS_SUPPORTED) - PNG_tRNS; -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - PNG_zTXt; -#endif -#endif /* PNG_USE_LOCAL_ARRAYS */ - /* First we make sure we have enough data for the 4 byte chunk name - * and the 4 byte chunk length before proceeding with decoding the - * chunk data. To fully decode each of these chunks, we also make - * sure we have enough data in the buffer for the 4 byte CRC at the - * end of every chunk (except IDAT, which is handled separately). - */ - if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) - { - png_byte chunk_length[4]; - - if (png_ptr->buffer_size < 8) - { - png_push_save_buffer(png_ptr); - return; - } - - png_push_fill_buffer(png_ptr, chunk_length, 4); - png_ptr->push_length = png_get_uint_32(chunk_length); - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; - } - - if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length); - } - else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length); - } - else if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4)) - { - /* If we reach an IDAT chunk, this means we have read all of the - * header chunks, and we can start reading the image (or if this - * is called after the image has been read - we have an error). - */ - if (png_ptr->mode & PNG_HAVE_IDAT) - { - if (png_ptr->push_length == 0) - return; - - if (png_ptr->mode & PNG_AFTER_IDAT) - png_error(png_ptr, "Too many IDAT's found"); - } - - png_ptr->idat_size = png_ptr->push_length; - png_ptr->mode |= PNG_HAVE_IDAT; - png_ptr->process_mode = PNG_READ_IDAT_MODE; - png_push_have_info(png_ptr, info_ptr); - png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes; - png_ptr->zstream.next_out = png_ptr->row_buf; - return; - } - else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_IEND(png_ptr, info_ptr, png_ptr->push_length); - png_ptr->process_mode = PNG_READ_DONE_MODE; - png_push_have_end(png_ptr, info_ptr); - } -#if defined(PNG_READ_gAMA_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_gAMA(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_sBIT_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_sBIT(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_cHRM(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_sRGB_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_sRGB(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_iCCP_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_iCCP(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_sPLT_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_sPLT(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_tRNS_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_tRNS(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_bKGD_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_bKGD(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_hIST_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_hIST(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_pHYs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_pHYs(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_oFFs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_oFFs(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_pCAL(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_sCAL_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_sCAL(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_tIME_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_tIME(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_tEXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4)) - { - png_push_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4)) - { - png_push_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_iTXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4)) - { - png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length); - } -#endif - else - { - png_push_handle_unknown(png_ptr, info_ptr, png_ptr->push_length); - } - - png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -} - -void /* PRIVATE */ -png_push_crc_skip(png_structp png_ptr, png_uint_32 skip) -{ - png_ptr->process_mode = PNG_SKIP_MODE; - png_ptr->skip_length = skip; -} - -void /* PRIVATE */ -png_push_crc_finish(png_structp png_ptr) -{ - if (png_ptr->skip_length && png_ptr->save_buffer_size) - { - png_size_t save_size; - - if (png_ptr->skip_length < (png_uint_32)png_ptr->save_buffer_size) - save_size = (png_size_t)png_ptr->skip_length; - else - save_size = png_ptr->save_buffer_size; - - png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size); - - png_ptr->skip_length -= save_size; - png_ptr->buffer_size -= save_size; - png_ptr->save_buffer_size -= save_size; - png_ptr->save_buffer_ptr += save_size; - } - if (png_ptr->skip_length && png_ptr->current_buffer_size) - { - png_size_t save_size; - - if (png_ptr->skip_length < (png_uint_32)png_ptr->current_buffer_size) - save_size = (png_size_t)png_ptr->skip_length; - else - save_size = png_ptr->current_buffer_size; - - png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size); - - png_ptr->skip_length -= save_size; - png_ptr->buffer_size -= save_size; - png_ptr->current_buffer_size -= save_size; - png_ptr->current_buffer_ptr += save_size; - } - if (!png_ptr->skip_length) - { - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - - png_crc_finish(png_ptr, 0); - png_ptr->process_mode = PNG_READ_CHUNK_MODE; - } -} - -void /* PRIVATE */ -png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) -{ - png_bytep ptr; - - ptr = buffer; - if (png_ptr->save_buffer_size) - { - png_size_t save_size; - - if (length < png_ptr->save_buffer_size) - save_size = length; - else - save_size = png_ptr->save_buffer_size; - - png_memcpy(ptr, png_ptr->save_buffer_ptr, save_size); - length -= save_size; - ptr += save_size; - png_ptr->buffer_size -= save_size; - png_ptr->save_buffer_size -= save_size; - png_ptr->save_buffer_ptr += save_size; - } - if (length && png_ptr->current_buffer_size) - { - png_size_t save_size; - - if (length < png_ptr->current_buffer_size) - save_size = length; - else - save_size = png_ptr->current_buffer_size; - - png_memcpy(ptr, png_ptr->current_buffer_ptr, save_size); - png_ptr->buffer_size -= save_size; - png_ptr->current_buffer_size -= save_size; - png_ptr->current_buffer_ptr += save_size; - } -} - -void /* PRIVATE */ -png_push_save_buffer(png_structp png_ptr) -{ - if (png_ptr->save_buffer_size) - { - if (png_ptr->save_buffer_ptr != png_ptr->save_buffer) - { - png_size_t i,istop; - png_bytep sp; - png_bytep dp; - - istop = png_ptr->save_buffer_size; - for (i = 0, sp = png_ptr->save_buffer_ptr, dp = png_ptr->save_buffer; - i < istop; i++, sp++, dp++) - { - *dp = *sp; - } - } - } - if (png_ptr->save_buffer_size + png_ptr->current_buffer_size > - png_ptr->save_buffer_max) - { - png_size_t new_max; - png_bytep old_buffer; - - new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256; - old_buffer = png_ptr->save_buffer; - png_ptr->save_buffer = (png_bytep)png_malloc(png_ptr, - (png_uint_32)new_max); - png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size); - png_free(png_ptr, old_buffer); - png_ptr->save_buffer_max = new_max; - } - if (png_ptr->current_buffer_size) - { - png_memcpy(png_ptr->save_buffer + png_ptr->save_buffer_size, - png_ptr->current_buffer_ptr, png_ptr->current_buffer_size); - png_ptr->save_buffer_size += png_ptr->current_buffer_size; - png_ptr->current_buffer_size = 0; - } - png_ptr->save_buffer_ptr = png_ptr->save_buffer; - png_ptr->buffer_size = 0; -} - -void /* PRIVATE */ -png_push_restore_buffer(png_structp png_ptr, png_bytep buffer, - png_size_t buffer_length) -{ - png_ptr->current_buffer = buffer; - png_ptr->current_buffer_size = buffer_length; - png_ptr->buffer_size = buffer_length + png_ptr->save_buffer_size; - png_ptr->current_buffer_ptr = png_ptr->current_buffer; -} - -void /* PRIVATE */ -png_push_read_IDAT(png_structp png_ptr) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IDAT; -#endif - if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) - { - png_byte chunk_length[4]; - - if (png_ptr->buffer_size < 8) - { - png_push_save_buffer(png_ptr); - return; - } - - png_push_fill_buffer(png_ptr, chunk_length, 4); - png_ptr->push_length = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; - - if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4)) - { - png_ptr->process_mode = PNG_READ_CHUNK_MODE; - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) - png_error(png_ptr, "Not enough compressed data"); - return; - } - - png_ptr->idat_size = png_ptr->push_length; - } - if (png_ptr->idat_size && png_ptr->save_buffer_size) - { - png_size_t save_size; - - if (png_ptr->idat_size < (png_uint_32)png_ptr->save_buffer_size) - { - save_size = (png_size_t)png_ptr->idat_size; - /* check for overflow */ - if((png_uint_32)save_size != png_ptr->idat_size) - png_error(png_ptr, "save_size overflowed in pngpread"); - } - else - save_size = png_ptr->save_buffer_size; - - png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size); - png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size); - - png_ptr->idat_size -= save_size; - png_ptr->buffer_size -= save_size; - png_ptr->save_buffer_size -= save_size; - png_ptr->save_buffer_ptr += save_size; - } - if (png_ptr->idat_size && png_ptr->current_buffer_size) - { - png_size_t save_size; - - if (png_ptr->idat_size < (png_uint_32)png_ptr->current_buffer_size) - { - save_size = (png_size_t)png_ptr->idat_size; - /* check for overflow */ - if((png_uint_32)save_size != png_ptr->idat_size) - png_error(png_ptr, "save_size overflowed in pngpread"); - } - else - save_size = png_ptr->current_buffer_size; - - png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size); - png_process_IDAT_data(png_ptr, png_ptr->current_buffer_ptr, save_size); - - png_ptr->idat_size -= save_size; - png_ptr->buffer_size -= save_size; - png_ptr->current_buffer_size -= save_size; - png_ptr->current_buffer_ptr += save_size; - } - if (!png_ptr->idat_size) - { - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - - png_crc_finish(png_ptr, 0); - png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; - } -} - -void /* PRIVATE */ -png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, - png_size_t buffer_length) -{ - int ret; - - if ((png_ptr->flags & PNG_FLAG_ZLIB_FINISHED) && buffer_length) - png_error(png_ptr, "Extra compression data"); - - png_ptr->zstream.next_in = buffer; - png_ptr->zstream.avail_in = (uInt)buffer_length; - for(;;) - { - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret != Z_OK) - { - if (ret == Z_STREAM_END) - { - if (png_ptr->zstream.avail_in) - png_error(png_ptr, "Extra compressed data"); - if (!(png_ptr->zstream.avail_out)) - { - png_push_process_row(png_ptr); - } - - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - else if (ret == Z_BUF_ERROR) - break; - else - png_error(png_ptr, "Decompression Error"); - } - if (!(png_ptr->zstream.avail_out)) - { - png_push_process_row(png_ptr); - png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes; - png_ptr->zstream.next_out = png_ptr->row_buf; - } - else - break; - } -} - -void /* PRIVATE */ -png_push_process_row(png_structp png_ptr) -{ - png_ptr->row_info.color_type = png_ptr->color_type; - png_ptr->row_info.width = png_ptr->iwidth; - png_ptr->row_info.channels = png_ptr->channels; - png_ptr->row_info.bit_depth = png_ptr->bit_depth; - png_ptr->row_info.pixel_depth = png_ptr->pixel_depth; - - png_ptr->row_info.rowbytes = ((png_ptr->row_info.width * - (png_uint_32)png_ptr->row_info.pixel_depth + 7) >> 3); - - png_read_filter_row(png_ptr, &(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->prev_row + 1, - (int)(png_ptr->row_buf[0])); - - png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf, - png_ptr->rowbytes + 1); - - if (png_ptr->transformations) - png_do_read_transformations(png_ptr); - -#if defined(PNG_READ_INTERLACING_SUPPORTED) - /* blow up interlaced rows to full size */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) - { - if (png_ptr->pass < 6) -/* old interface (pre-1.0.9): - png_do_read_interlace(&(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations); - */ - png_do_read_interlace(png_ptr); - - switch (png_ptr->pass) - { - case 0: - { - int i; - for (i = 0; i < 8 && png_ptr->pass == 0; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); /* updates png_ptr->pass */ - } - if (png_ptr->pass == 2) /* pass 1 might be empty */ - { - for (i = 0; i < 4 && png_ptr->pass == 2; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - } - break; - } - case 1: - { - int i; - for (i = 0; i < 8 && png_ptr->pass == 1; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - if (png_ptr->pass == 2) /* skip top 4 generated rows */ - { - for (i = 0; i < 4 && png_ptr->pass == 2; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - } - break; - } - case 2: - { - int i; - for (i = 0; i < 4 && png_ptr->pass == 2; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - for (i = 0; i < 4 && png_ptr->pass == 2; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - if (png_ptr->pass == 4) /* pass 3 might be empty */ - { - for (i = 0; i < 2 && png_ptr->pass == 4; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - } - break; - } - case 3: - { - int i; - for (i = 0; i < 4 && png_ptr->pass == 3; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - if (png_ptr->pass == 4) /* skip top two generated rows */ - { - for (i = 0; i < 2 && png_ptr->pass == 4; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - } - break; - } - case 4: - { - int i; - for (i = 0; i < 2 && png_ptr->pass == 4; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - for (i = 0; i < 2 && png_ptr->pass == 4; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - if (png_ptr->pass == 6) /* pass 5 might be empty */ - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - break; - } - case 5: - { - int i; - for (i = 0; i < 2 && png_ptr->pass == 5; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - if (png_ptr->pass == 6) /* skip top generated row */ - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - break; - } - case 6: - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - if (png_ptr->pass != 6) - break; - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - } - } - else -#endif - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } -} - -void /* PRIVATE */ -png_read_push_finish_row(png_structp png_ptr) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* start of interlace block */ - const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; - - /* offset to next interlace block */ - const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - - /* start of interlace block in the y direction */ - const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; - - /* offset to next interlace block in the y direction */ - const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; - - /* Width of interlace block. This is not currently used - if you need - * it, uncomment it here and in png.h - const int FARDATA png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; - */ - - /* Height of interlace block. This is not currently used - if you need - * it, uncomment it here and in png.h - const int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; - */ -#endif - - png_ptr->row_number++; - if (png_ptr->row_number < png_ptr->num_rows) - return; - - if (png_ptr->interlaced) - { - png_ptr->row_number = 0; - png_memset_check(png_ptr, png_ptr->prev_row, 0, - png_ptr->rowbytes + 1); - do - { - png_ptr->pass++; - if ((png_ptr->pass == 1 && png_ptr->width < 5) || - (png_ptr->pass == 3 && png_ptr->width < 3) || - (png_ptr->pass == 5 && png_ptr->width < 2)) - png_ptr->pass++; - - if (png_ptr->pass >= 7) - break; - - png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - - png_ptr->irowbytes = ((png_ptr->iwidth * - png_ptr->pixel_depth + 7) >> 3) + 1; - - if (png_ptr->transformations & PNG_INTERLACE) - break; - - png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; - - } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0); - } -} - -#if defined(PNG_READ_tEXt_SUPPORTED) -void /* PRIVATE */ -png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND)) - { - png_error(png_ptr, "Out of place tEXt"); - /* to quiet some compiler warnings */ - if(info_ptr == NULL) return; - } - -#ifdef PNG_MAX_MALLOC_64K - png_ptr->skip_length = 0; /* This may not be necessary */ - - if (length > (png_uint_32)65535L) /* Can't hold the entire string in memory */ - { - png_warning(png_ptr, "tEXt chunk too large to fit in memory"); - png_ptr->skip_length = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - png_ptr->current_text = (png_charp)png_malloc(png_ptr, - (png_uint_32)(length+1)); - png_ptr->current_text[length] = '\0'; - png_ptr->current_text_ptr = png_ptr->current_text; - png_ptr->current_text_size = (png_size_t)length; - png_ptr->current_text_left = (png_size_t)length; - png_ptr->process_mode = PNG_READ_tEXt_MODE; -} - -void /* PRIVATE */ -png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr->buffer_size && png_ptr->current_text_left) - { - png_size_t text_size; - - if (png_ptr->buffer_size < png_ptr->current_text_left) - text_size = png_ptr->buffer_size; - else - text_size = png_ptr->current_text_left; - png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size); - png_ptr->current_text_left -= text_size; - png_ptr->current_text_ptr += text_size; - } - if (!(png_ptr->current_text_left)) - { - png_textp text_ptr; - png_charp text; - png_charp key; - - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - - png_push_crc_finish(png_ptr); - -#if defined(PNG_MAX_MALLOC_64K) - if (png_ptr->skip_length) - return; -#endif - - key = png_ptr->current_text; - png_ptr->current_text = 0; - - for (text = key; *text; text++) - /* empty loop */ ; - - if (text != key + png_ptr->current_text_size) - text++; - - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; - text_ptr->key = key; -#ifdef PNG_iTXt_SUPPORTED - text_ptr->lang = (char *)NULL; - text_ptr->lang_key = (char *)NULL; -#endif - text_ptr->text = text; - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, key); - png_free(png_ptr, text_ptr); - } -} -#endif - -#if defined(PNG_READ_zTXt_SUPPORTED) -void /* PRIVATE */ -png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND)) - { - png_error(png_ptr, "Out of place zTXt"); - /* to quiet some compiler warnings */ - if(info_ptr == NULL) return; - } - -#ifdef PNG_MAX_MALLOC_64K - /* We can't handle zTXt chunks > 64K, since we don't have enough space - * to be able to store the uncompressed data. Actually, the threshold - * is probably around 32K, but it isn't as definite as 64K is. - */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "zTXt chunk too large to fit in memory"); - png_push_crc_skip(png_ptr, length); - return; - } -#endif - - png_ptr->current_text = (png_charp)png_malloc(png_ptr, - (png_uint_32)(length+1)); - png_ptr->current_text[length] = '\0'; - png_ptr->current_text_ptr = png_ptr->current_text; - png_ptr->current_text_size = (png_size_t)length; - png_ptr->current_text_left = (png_size_t)length; - png_ptr->process_mode = PNG_READ_zTXt_MODE; -} - -void /* PRIVATE */ -png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr->buffer_size && png_ptr->current_text_left) - { - png_size_t text_size; - - if (png_ptr->buffer_size < (png_uint_32)png_ptr->current_text_left) - text_size = png_ptr->buffer_size; - else - text_size = png_ptr->current_text_left; - png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size); - png_ptr->current_text_left -= text_size; - png_ptr->current_text_ptr += text_size; - } - if (!(png_ptr->current_text_left)) - { - png_textp text_ptr; - png_charp text; - png_charp key; - int ret; - png_size_t text_size, key_size; - - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - - png_push_crc_finish(png_ptr); - - key = png_ptr->current_text; - png_ptr->current_text = 0; - - for (text = key; *text; text++) - /* empty loop */ ; - - /* zTXt can't have zero text */ - if (text == key + png_ptr->current_text_size) - { - png_free(png_ptr, key); - return; - } - - text++; - - if (*text != PNG_TEXT_COMPRESSION_zTXt) /* check compression byte */ - { - png_free(png_ptr, key); - return; - } - - text++; - - png_ptr->zstream.next_in = (png_bytep )text; - png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size - - (text - key)); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - key_size = text - key; - text_size = 0; - text = NULL; - ret = Z_STREAM_END; - - while (png_ptr->zstream.avail_in) - { - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret != Z_OK && ret != Z_STREAM_END) - { - inflateReset(&png_ptr->zstream); - png_ptr->zstream.avail_in = 0; - png_free(png_ptr, key); - png_free(png_ptr, text); - return; - } - if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END) - { - if (text == NULL) - { - text = (png_charp)png_malloc(png_ptr, - (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out + - key_size + 1)); - png_memcpy(text + key_size, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - png_memcpy(text, key, key_size); - text_size = key_size + png_ptr->zbuf_size - - png_ptr->zstream.avail_out; - *(text + text_size) = '\0'; - } - else - { - png_charp tmp; - - tmp = text; - text = (png_charp)png_malloc(png_ptr, text_size + - (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out - + 1)); - png_memcpy(text, tmp, text_size); - png_free(png_ptr, tmp); - png_memcpy(text + text_size, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out; - *(text + text_size) = '\0'; - } - if (ret != Z_STREAM_END) - { - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - } - else - { - break; - } - - if (ret == Z_STREAM_END) - break; - } - - inflateReset(&png_ptr->zstream); - png_ptr->zstream.avail_in = 0; - - if (ret != Z_STREAM_END) - { - png_free(png_ptr, key); - png_free(png_ptr, text); - return; - } - - png_free(png_ptr, key); - key = text; - text += key_size; - - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt; - text_ptr->key = key; -#ifdef PNG_iTXt_SUPPORTED - text_ptr->lang = (char *)NULL; - text_ptr->lang_key = (char *)NULL; -#endif - text_ptr->text = text; - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, key); - png_free(png_ptr, text_ptr); - } -} -#endif - -#if defined(PNG_READ_iTXt_SUPPORTED) -void /* PRIVATE */ -png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND)) - { - png_error(png_ptr, "Out of place iTXt"); - /* to quiet some compiler warnings */ - if(info_ptr == NULL) return; - } - -#ifdef PNG_MAX_MALLOC_64K - png_ptr->skip_length = 0; /* This may not be necessary */ - - if (length > (png_uint_32)65535L) /* Can't hold the entire string in memory */ - { - png_warning(png_ptr, "iTXt chunk too large to fit in memory"); - png_ptr->skip_length = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - png_ptr->current_text = (png_charp)png_malloc(png_ptr, - (png_uint_32)(length+1)); - png_ptr->current_text[length] = '\0'; - png_ptr->current_text_ptr = png_ptr->current_text; - png_ptr->current_text_size = (png_size_t)length; - png_ptr->current_text_left = (png_size_t)length; - png_ptr->process_mode = PNG_READ_iTXt_MODE; -} - -void /* PRIVATE */ -png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr) -{ - - if (png_ptr->buffer_size && png_ptr->current_text_left) - { - png_size_t text_size; - - if (png_ptr->buffer_size < png_ptr->current_text_left) - text_size = png_ptr->buffer_size; - else - text_size = png_ptr->current_text_left; - png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size); - png_ptr->current_text_left -= text_size; - png_ptr->current_text_ptr += text_size; - } - if (!(png_ptr->current_text_left)) - { - png_textp text_ptr; - png_charp key; - int comp_flag; - png_charp lang; - png_charp lang_key; - png_charp text; - - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - - png_push_crc_finish(png_ptr); - -#if defined(PNG_MAX_MALLOC_64K) - if (png_ptr->skip_length) - return; -#endif - - key = png_ptr->current_text; - png_ptr->current_text = 0; - - for (lang = key; *lang; lang++) - /* empty loop */ ; - - if (lang != key + png_ptr->current_text_size) - lang++; - - comp_flag = *lang++; - lang++; /* skip comp_type, always zero */ - - for (lang_key = lang; *lang_key; lang_key++) - /* empty loop */ ; - lang_key++; /* skip NUL separator */ - - for (text = lang_key; *text; text++) - /* empty loop */ ; - - if (text != key + png_ptr->current_text_size) - text++; - - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = comp_flag + 2; - text_ptr->key = key; - text_ptr->lang = lang; - text_ptr->lang_key = lang_key; - text_ptr->text = text; - text_ptr->text_length = 0; - text_ptr->itxt_length = png_strlen(text); - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - } -} -#endif - -/* This function is called when we haven't found a handler for this - * chunk. If there isn't a problem with the chunk itself (ie a bad chunk - * name or a critical chunk), the chunk is (currently) silently ignored. - */ -void /* PRIVATE */ -png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_uint_32 skip=0; - png_check_chunk_name(png_ptr, png_ptr->chunk_name); - - if (!(png_ptr->chunk_name[0] & 0x20)) - { -#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) - if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != - HANDLE_CHUNK_ALWAYS -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) - && png_ptr->read_user_chunk_fn == (png_user_chunk_ptr)NULL -#endif - ) -#endif - png_chunk_error(png_ptr, "unknown critical chunk"); - - /* to quiet compiler warnings about unused info_ptr */ - if (info_ptr == NULL) - return; - } - -#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) - if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) - { - png_unknown_chunk chunk; - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "unknown chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - strcpy((png_charp)chunk.name, (png_charp)png_ptr->chunk_name); - chunk.data = (png_bytep)png_malloc(png_ptr, length); - png_crc_read(png_ptr, chunk.data, length); - chunk.size = length; -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) - if(png_ptr->read_user_chunk_fn != (png_user_chunk_ptr)NULL) - { - /* callback to user unknown chunk handler */ - if ((*(png_ptr->read_user_chunk_fn)) (png_ptr, &chunk) <= 0) - { - if (!(png_ptr->chunk_name[0] & 0x20)) - if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != - HANDLE_CHUNK_ALWAYS) - png_chunk_error(png_ptr, "unknown critical chunk"); - } - png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1); - } - else -#endif - png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1); - png_free(png_ptr, chunk.data); - } - else -#endif - skip=length; - png_push_crc_skip(png_ptr, skip); -} - -void /* PRIVATE */ -png_push_have_info(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr->info_fn != NULL) - (*(png_ptr->info_fn))(png_ptr, info_ptr); -} - -void /* PRIVATE */ -png_push_have_end(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr->end_fn != NULL) - (*(png_ptr->end_fn))(png_ptr, info_ptr); -} - -void /* PRIVATE */ -png_push_have_row(png_structp png_ptr, png_bytep row) -{ - if (png_ptr->row_fn != NULL) - (*(png_ptr->row_fn))(png_ptr, row, png_ptr->row_number, - (int)png_ptr->pass); -} - -void PNGAPI -png_progressive_combine_row (png_structp png_ptr, - png_bytep old_row, png_bytep new_row) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - const int FARDATA png_pass_dsp_mask[7] = - {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; -#endif - if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */ - png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]); -} - -void PNGAPI -png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr, - png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, - png_progressive_end_ptr end_fn) -{ - png_ptr->info_fn = info_fn; - png_ptr->row_fn = row_fn; - png_ptr->end_fn = end_fn; - - png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer); -} - -png_voidp PNGAPI -png_get_progressive_ptr(png_structp png_ptr) -{ - return png_ptr->io_ptr; -} - -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - diff --git a/libraries/libpng-1.0.9/pngread.c b/libraries/libpng-1.0.9/pngread.c deleted file mode 100644 index 4df8daa..0000000 --- a/libraries/libpng-1.0.9/pngread.c +++ /dev/null @@ -1,1339 +0,0 @@ - -/* pngread.c - read a PNG file - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This file contains routines that an application calls directly to - * read a PNG file or stream. - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Create a PNG structure for reading, and allocate any memory needed. */ -png_structp PNGAPI -png_create_read_struct(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn) -{ - -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); -} - -/* Alternate create PNG structure for reading, and allocate any memory needed. */ -png_structp PNGAPI -png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - - png_structp png_ptr; - -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf jmpbuf; -#endif -#endif - - int i; - - png_debug(1, "in png_create_read_struct\n"); -#ifdef PNG_USER_MEM_SUPPORTED - if ((png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - (png_malloc_ptr)malloc_fn)) == NULL) -#else - if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL) -#endif - { - return (png_structp)NULL; - } - -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) -#else - if (setjmp(png_ptr->jmpbuf)) -#endif - { - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf=NULL; - png_destroy_struct(png_ptr); - return (png_structp)NULL; - } -#ifdef USE_FAR_KEYWORD - png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf)); -#endif -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); -#endif - - png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - - i=0; - do - { - if(user_png_ver[i] != png_libpng_ver[i]) - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; - } while (png_libpng_ver[i++]); - - if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) - { - /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so - * we must recompile any applications that use any older library version. - * For versions after libpng 1.0, we will be compatible, so we need - * only check the first digit. - */ - if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || - (user_png_ver[0] == '0' && user_png_ver[2] < '9')) - { - png_error(png_ptr, - "Incompatible libpng version in application and library"); - } - - /* Libpng 1.0.6 was not binary compatible, due to insertion of the - info_ptr->free_me member. Note to maintainer: this test can be - removed from version 2.0.0 and beyond because the previous test - would have already rejected it. */ - - if (user_png_ver[4] == '6' && user_png_ver[2] == '0' && - user_png_ver[0] == '1' && user_png_ver[5] == '\0') - { - png_error(png_ptr, - "Application must be recompiled; version 1.0.6 was incompatible"); - } - } - - /* initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, - (png_uint_32)png_ptr->zbuf_size); - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - - switch (inflateInit(&png_ptr->zstream)) - { - case Z_OK: /* Do nothing */ break; - case Z_MEM_ERROR: - case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory error"); break; - case Z_VERSION_ERROR: png_error(png_ptr, "zlib version error"); break; - default: png_error(png_ptr, "Unknown zlib error"); - } - - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - png_set_read_fn(png_ptr, NULL, NULL); - - return (png_ptr); -} - -/* Initialize PNG structure for reading, and allocate any memory needed. - This interface is deprecated in favour of the png_create_read_struct(), - and it will eventually disappear. */ -#undef png_read_init -void PNGAPI -png_read_init(png_structp png_ptr) -{ - /* We only come here via pre-1.0.7-compiled applications */ - png_read_init_2(png_ptr, "1.0.0", 10000, 10000); -} - -void PNGAPI -png_read_init_2(png_structp png_ptr, png_const_charp user_png_ver, - png_size_t png_struct_size, png_size_t png_info_size) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; /* to save current jump buffer */ -#endif - - int i=0; - do - { - if(user_png_ver[i] != png_libpng_ver[i]) - { -#ifdef PNG_LEGACY_SUPPORTED - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; -#else - png_ptr->error_fn=(png_error_ptr)NULL; - png_error(png_ptr, - "Application uses deprecated png_read_init() and must be recompiled."); -#endif - } - } while (png_libpng_ver[i++]); - - if(sizeof(png_struct) > png_struct_size || - sizeof(png_info) > png_info_size) - { - png_ptr->error_fn=(png_error_ptr)NULL; - png_error(png_ptr, - "Application and library have different sized structs. Please recompile."); - } - - png_debug(1, "in png_read_init_2\n"); - -#ifdef PNG_SETJMP_SUPPORTED - /* save jump buffer and error functions */ - png_memcpy(tmp_jmp, png_ptr->jmpbuf, sizeof (jmp_buf)); -#endif - - /* reset all variables to 0 */ - png_memset(png_ptr, 0, sizeof (png_struct)); - -#ifdef PNG_SETJMP_SUPPORTED - /* restore jump buffer */ - png_memcpy(png_ptr->jmpbuf, tmp_jmp, sizeof (jmp_buf)); -#endif - - /* initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, - (png_uint_32)png_ptr->zbuf_size); - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - - switch (inflateInit(&png_ptr->zstream)) - { - case Z_OK: /* Do nothing */ break; - case Z_MEM_ERROR: - case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory"); break; - case Z_VERSION_ERROR: png_error(png_ptr, "zlib version"); break; - default: png_error(png_ptr, "Unknown zlib error"); - } - - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - png_set_read_fn(png_ptr, NULL, NULL); -} - -/* Read the information before the actual image data. This has been - * changed in v0.90 to allow reading a file that already has the magic - * bytes read from the stream. You can tell libpng how many bytes have - * been read from the beginning of the stream (up to the maximum of 8) - * via png_set_sig_bytes(), and we will only check the remaining bytes - * here. The application can then have access to the signature bytes we - * read if it is determined that this isn't a valid PNG file. - */ -void PNGAPI -png_read_info(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_read_info\n"); - /* save jump buffer and error functions */ - /* If we haven't checked all of the PNG signature bytes, do so now. */ - if (png_ptr->sig_bytes < 8) - { - png_size_t num_checked = png_ptr->sig_bytes, - num_to_check = 8 - num_checked; - - png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check); - png_ptr->sig_bytes = 8; - - if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) - { - if (num_checked < 4 && - png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) - png_error(png_ptr, "Not a PNG file"); - else - png_error(png_ptr, "PNG file corrupted by ASCII conversion"); - } - if (num_checked < 3) - png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE; - } - - for(;;) - { -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IHDR; - PNG_IDAT; - PNG_IEND; - PNG_PLTE; -#if defined(PNG_READ_bKGD_SUPPORTED) - PNG_bKGD; -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) - PNG_cHRM; -#endif -#if defined(PNG_READ_gAMA_SUPPORTED) - PNG_gAMA; -#endif -#if defined(PNG_READ_hIST_SUPPORTED) - PNG_hIST; -#endif -#if defined(PNG_READ_iCCP_SUPPORTED) - PNG_iCCP; -#endif -#if defined(PNG_READ_iTXt_SUPPORTED) - PNG_iTXt; -#endif -#if defined(PNG_READ_oFFs_SUPPORTED) - PNG_oFFs; -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - PNG_pCAL; -#endif -#if defined(PNG_READ_pHYs_SUPPORTED) - PNG_pHYs; -#endif -#if defined(PNG_READ_sBIT_SUPPORTED) - PNG_sBIT; -#endif -#if defined(PNG_READ_sCAL_SUPPORTED) - PNG_sCAL; -#endif -#if defined(PNG_READ_sPLT_SUPPORTED) - PNG_sPLT; -#endif -#if defined(PNG_READ_sRGB_SUPPORTED) - PNG_sRGB; -#endif -#if defined(PNG_READ_tEXt_SUPPORTED) - PNG_tEXt; -#endif -#if defined(PNG_READ_tIME_SUPPORTED) - PNG_tIME; -#endif -#if defined(PNG_READ_tRNS_SUPPORTED) - PNG_tRNS; -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - PNG_zTXt; -#endif -#endif /* PNG_GLOBAL_ARRAYS */ - png_byte chunk_length[4]; - png_uint_32 length; - - png_read_data(png_ptr, chunk_length, 4); - length = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - - png_debug2(0, "Reading %s chunk, length=%lu.\n", png_ptr->chunk_name, - length); - - /* This should be a binary subdivision search or a hash for - * matching the chunk name rather than a linear search. - */ - if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4)) - png_handle_IHDR(png_ptr, info_ptr, length); - else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) - png_handle_IEND(png_ptr, info_ptr, length); -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name)) - { - if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - png_ptr->mode |= PNG_HAVE_IDAT; - png_handle_unknown(png_ptr, info_ptr, length); - if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) - png_ptr->mode |= PNG_HAVE_PLTE; - else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - { - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before IDAT"); - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - break; - } - } -#endif - else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) - png_handle_PLTE(png_ptr, info_ptr, length); - else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - { - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before IDAT"); - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - - png_ptr->idat_size = length; - png_ptr->mode |= PNG_HAVE_IDAT; - break; - } -#if defined(PNG_READ_bKGD_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4)) - png_handle_bKGD(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4)) - png_handle_cHRM(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_gAMA_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4)) - png_handle_gAMA(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_hIST_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4)) - png_handle_hIST(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_oFFs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4)) - png_handle_oFFs(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4)) - png_handle_pCAL(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sCAL_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4)) - png_handle_sCAL(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_pHYs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4)) - png_handle_pHYs(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sBIT_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4)) - png_handle_sBIT(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sRGB_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4)) - png_handle_sRGB(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_iCCP_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4)) - png_handle_iCCP(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sPLT_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4)) - png_handle_sPLT(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tEXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4)) - png_handle_tEXt(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tIME_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4)) - png_handle_tIME(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tRNS_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4)) - png_handle_tRNS(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4)) - png_handle_zTXt(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_iTXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4)) - png_handle_iTXt(png_ptr, info_ptr, length); -#endif - else - png_handle_unknown(png_ptr, info_ptr, length); - } -} - -/* optional call to update the users info_ptr structure */ -void PNGAPI -png_read_update_info(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_read_update_info\n"); - /* save jump buffer and error functions */ - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - png_read_start_row(png_ptr); - else - png_warning(png_ptr, - "Ignoring extra png_read_update_info() call; row buffer not reallocated"); - png_read_transform_info(png_ptr, info_ptr); -} - -/* Initialize palette, background, etc, after transformations - * are set, but before any reading takes place. This allows - * the user to obtain a gamma-corrected palette, for example. - * If the user doesn't call this, we will do it ourselves. - */ -void PNGAPI -png_start_read_image(png_structp png_ptr) -{ - png_debug(1, "in png_start_read_image\n"); - /* save jump buffer and error functions */ - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - png_read_start_row(png_ptr); -} - -void PNGAPI -png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IDAT; - const int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; - const int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; -#endif - int ret; - png_debug2(1, "in png_read_row (row %lu, pass %d)\n", - png_ptr->row_number, png_ptr->pass); - /* save jump buffer and error functions */ - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - png_read_start_row(png_ptr); - if (png_ptr->row_number == 0 && png_ptr->pass == 0) - { - /* check for transforms that have been set but were defined out */ -#if defined(PNG_WRITE_INVERT_SUPPORTED) && !defined(PNG_READ_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) - png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) - png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && !defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) - png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) - png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) - png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined."); -#endif - } - -#if defined(PNG_READ_INTERLACING_SUPPORTED) - /* if interlaced and we do not need a new row, combine row and return */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) - { - switch (png_ptr->pass) - { - case 0: - if (png_ptr->row_number & 0x07) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 1: - if ((png_ptr->row_number & 0x07) || png_ptr->width < 5) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 2: - if ((png_ptr->row_number & 0x07) != 4) - { - if (dsp_row != NULL && (png_ptr->row_number & 4)) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 3: - if ((png_ptr->row_number & 3) || png_ptr->width < 3) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 4: - if ((png_ptr->row_number & 3) != 2) - { - if (dsp_row != NULL && (png_ptr->row_number & 2)) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 5: - if ((png_ptr->row_number & 1) || png_ptr->width < 2) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 6: - if (!(png_ptr->row_number & 1)) - { - png_read_finish_row(png_ptr); - return; - } - break; - } - } -#endif - - if (!(png_ptr->mode & PNG_HAVE_IDAT)) - png_error(png_ptr, "Invalid attempt to read row data"); - - png_ptr->zstream.next_out = png_ptr->row_buf; - png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes; - do - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_byte chunk_length[4]; - - png_crc_finish(png_ptr, 0); - - png_read_data(png_ptr, chunk_length, 4); - png_ptr->idat_size = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - png_error(png_ptr, "Not enough image data"); - } - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - png_crc_read(png_ptr, png_ptr->zbuf, - (png_size_t)png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret == Z_STREAM_END) - { - if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_error(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression error"); - - } while (png_ptr->zstream.avail_out); - - png_ptr->row_info.color_type = png_ptr->color_type; - png_ptr->row_info.width = png_ptr->iwidth; - png_ptr->row_info.channels = png_ptr->channels; - png_ptr->row_info.bit_depth = png_ptr->bit_depth; - png_ptr->row_info.pixel_depth = png_ptr->pixel_depth; - png_ptr->row_info.rowbytes = ((png_ptr->row_info.width * - (png_uint_32)png_ptr->row_info.pixel_depth + 7) >> 3); - - if(png_ptr->row_buf[0]) - png_read_filter_row(png_ptr, &(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->prev_row + 1, - (int)(png_ptr->row_buf[0])); - - png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf, - png_ptr->rowbytes + 1); - -#if defined(PNG_MNG_FEATURES_SUPPORTED) - if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) - { - /* Intrapixel differencing */ - png_do_read_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1); - } -#endif - - if (png_ptr->transformations) - png_do_read_transformations(png_ptr); - -#if defined(PNG_READ_INTERLACING_SUPPORTED) - /* blow up interlaced rows to full size */ - if (png_ptr->interlaced && - (png_ptr->transformations & PNG_INTERLACE)) - { - if (png_ptr->pass < 6) -/* old interface (pre-1.0.9): - png_do_read_interlace(&(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations); - */ - png_do_read_interlace(png_ptr); - - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - if (row != NULL) - png_combine_row(png_ptr, row, - png_pass_mask[png_ptr->pass]); - } - else -#endif - { - if (row != NULL) - png_combine_row(png_ptr, row, 0xff); - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, 0xff); - } - png_read_finish_row(png_ptr); - - if (png_ptr->read_row_fn != NULL) - (*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); -} - -/* Read one or more rows of image data. If the image is interlaced, - * and png_set_interlace_handling() has been called, the rows need to - * contain the contents of the rows from the previous pass. If the - * image has alpha or transparency, and png_handle_alpha()[*] has been - * called, the rows contents must be initialized to the contents of the - * screen. - * - * "row" holds the actual image, and pixels are placed in it - * as they arrive. If the image is displayed after each pass, it will - * appear to "sparkle" in. "display_row" can be used to display a - * "chunky" progressive image, with finer detail added as it becomes - * available. If you do not want this "chunky" display, you may pass - * NULL for display_row. If you do not want the sparkle display, and - * you have not called png_handle_alpha(), you may pass NULL for rows. - * If you have called png_handle_alpha(), and the image has either an - * alpha channel or a transparency chunk, you must provide a buffer for - * rows. In this case, you do not have to provide a display_row buffer - * also, but you may. If the image is not interlaced, or if you have - * not called png_set_interlace_handling(), the display_row buffer will - * be ignored, so pass NULL to it. - * - * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.9 - */ - -void PNGAPI -png_read_rows(png_structp png_ptr, png_bytepp row, - png_bytepp display_row, png_uint_32 num_rows) -{ - png_uint_32 i; - png_bytepp rp; - png_bytepp dp; - - png_debug(1, "in png_read_rows\n"); - /* save jump buffer and error functions */ - rp = row; - dp = display_row; - if (rp != NULL && dp != NULL) - for (i = 0; i < num_rows; i++) - { - png_bytep rptr = *rp++; - png_bytep dptr = *dp++; - - png_read_row(png_ptr, rptr, dptr); - } - else if(rp != NULL) - for (i = 0; i < num_rows; i++) - { - png_bytep rptr = *rp; - png_read_row(png_ptr, rptr, NULL); - rp++; - } - else if(dp != NULL) - for (i = 0; i < num_rows; i++) - { - png_bytep dptr = *dp; - png_read_row(png_ptr, NULL, dptr); - dp++; - } -} - -/* Read the entire image. If the image has an alpha channel or a tRNS - * chunk, and you have called png_handle_alpha()[*], you will need to - * initialize the image to the current image that PNG will be overlaying. - * We set the num_rows again here, in case it was incorrectly set in - * png_read_start_row() by a call to png_read_update_info() or - * png_start_read_image() if png_set_interlace_handling() wasn't called - * prior to either of these functions like it should have been. You can - * only call this function once. If you desire to have an image for - * each pass of a interlaced image, use png_read_rows() instead. - * - * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.9 - */ -void PNGAPI -png_read_image(png_structp png_ptr, png_bytepp image) -{ - png_uint_32 i,image_height; - int pass, j; - png_bytepp rp; - - png_debug(1, "in png_read_image\n"); - /* save jump buffer and error functions */ - -#ifdef PNG_READ_INTERLACING_SUPPORTED - pass = png_set_interlace_handling(png_ptr); -#else - if (png_ptr->interlaced) - png_error(png_ptr, - "Cannot read interlaced image -- interlace handler disabled."); - pass = 1; -#endif - - - image_height=png_ptr->height; - png_ptr->num_rows = image_height; /* Make sure this is set correctly */ - - for (j = 0; j < pass; j++) - { - rp = image; - for (i = 0; i < image_height; i++) - { - png_read_row(png_ptr, *rp, NULL); - rp++; - } - } -} - -/* Read the end of the PNG file. Will not read past the end of the - * file, will verify the end is accurate, and will read any comments - * or time information at the end of the file, if info is not NULL. - */ -void PNGAPI -png_read_end(png_structp png_ptr, png_infop info_ptr) -{ - png_byte chunk_length[4]; - png_uint_32 length; - - png_debug(1, "in png_read_end\n"); - /* save jump buffer and error functions */ - png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */ - - do - { -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IHDR; - PNG_IDAT; - PNG_IEND; - PNG_PLTE; -#if defined(PNG_READ_bKGD_SUPPORTED) - PNG_bKGD; -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) - PNG_cHRM; -#endif -#if defined(PNG_READ_gAMA_SUPPORTED) - PNG_gAMA; -#endif -#if defined(PNG_READ_hIST_SUPPORTED) - PNG_hIST; -#endif -#if defined(PNG_READ_iCCP_SUPPORTED) - PNG_iCCP; -#endif -#if defined(PNG_READ_iTXt_SUPPORTED) - PNG_iTXt; -#endif -#if defined(PNG_READ_oFFs_SUPPORTED) - PNG_oFFs; -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - PNG_pCAL; -#endif -#if defined(PNG_READ_pHYs_SUPPORTED) - PNG_pHYs; -#endif -#if defined(PNG_READ_sBIT_SUPPORTED) - PNG_sBIT; -#endif -#if defined(PNG_READ_sCAL_SUPPORTED) - PNG_sCAL; -#endif -#if defined(PNG_READ_sPLT_SUPPORTED) - PNG_sPLT; -#endif -#if defined(PNG_READ_sRGB_SUPPORTED) - PNG_sRGB; -#endif -#if defined(PNG_READ_tEXt_SUPPORTED) - PNG_tEXt; -#endif -#if defined(PNG_READ_tIME_SUPPORTED) - PNG_tIME; -#endif -#if defined(PNG_READ_tRNS_SUPPORTED) - PNG_tRNS; -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - PNG_zTXt; -#endif -#endif /* PNG_GLOBAL_ARRAYS */ - - png_read_data(png_ptr, chunk_length, 4); - length = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - - png_debug1(0, "Reading %s chunk.\n", png_ptr->chunk_name); - - if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4)) - png_handle_IHDR(png_ptr, info_ptr, length); - else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) - png_handle_IEND(png_ptr, info_ptr, length); -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name)) - { - if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - { - if (length > 0 || png_ptr->mode & PNG_AFTER_IDAT) - png_error(png_ptr, "Too many IDAT's found"); - } - else - png_ptr->mode |= PNG_AFTER_IDAT; - png_handle_unknown(png_ptr, info_ptr, length); - if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) - png_ptr->mode |= PNG_HAVE_PLTE; - } -#endif - else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - { - /* Zero length IDATs are legal after the last IDAT has been - * read, but not after other chunks have been read. - */ - if (length > 0 || png_ptr->mode & PNG_AFTER_IDAT) - png_error(png_ptr, "Too many IDAT's found"); - png_crc_finish(png_ptr, length); - } - else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) - png_handle_PLTE(png_ptr, info_ptr, length); -#if defined(PNG_READ_bKGD_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4)) - png_handle_bKGD(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4)) - png_handle_cHRM(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_gAMA_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4)) - png_handle_gAMA(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_hIST_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4)) - png_handle_hIST(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_oFFs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4)) - png_handle_oFFs(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4)) - png_handle_pCAL(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sCAL_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4)) - png_handle_sCAL(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_pHYs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4)) - png_handle_pHYs(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sBIT_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4)) - png_handle_sBIT(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sRGB_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4)) - png_handle_sRGB(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_iCCP_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4)) - png_handle_iCCP(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sPLT_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4)) - png_handle_sPLT(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tEXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4)) - png_handle_tEXt(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tIME_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4)) - png_handle_tIME(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tRNS_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4)) - png_handle_tRNS(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4)) - png_handle_zTXt(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_iTXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4)) - png_handle_iTXt(png_ptr, info_ptr, length); -#endif - else - png_handle_unknown(png_ptr, info_ptr, length); - } while (!(png_ptr->mode & PNG_HAVE_IEND)); -} - -/* free all memory used by the read */ -void PNGAPI -png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, - png_infopp end_info_ptr_ptr) -{ - png_structp png_ptr = NULL; - png_infop info_ptr = NULL, end_info_ptr = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn = NULL; -#endif - - png_debug(1, "in png_destroy_read_struct\n"); - /* save jump buffer and error functions */ - if (png_ptr_ptr != NULL) - png_ptr = *png_ptr_ptr; - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (end_info_ptr_ptr != NULL) - end_info_ptr = *end_info_ptr_ptr; - -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif - - png_read_destroy(png_ptr, info_ptr, end_info_ptr); - - if (info_ptr != NULL) - { -#if defined(PNG_TEXT_SUPPORTED) - png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1); -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, free_fn); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = (png_infop)NULL; - } - - if (end_info_ptr != NULL) - { -#if defined(PNG_READ_TEXT_SUPPORTED) - png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1); -#endif -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)end_info_ptr, free_fn); -#else - png_destroy_struct((png_voidp)end_info_ptr); -#endif - *end_info_ptr_ptr = (png_infop)NULL; - } - - if (png_ptr != NULL) - { -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, free_fn); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - *png_ptr_ptr = (png_structp)NULL; - } -} - -/* free all memory used by the read (old method) */ -void PNGAPI -png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; -#endif - png_error_ptr error_fn; - png_error_ptr warning_fn; - png_voidp error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn; -#endif - - png_debug(1, "in png_read_destroy\n"); - /* save jump buffer and error functions */ - if (info_ptr != NULL) - png_info_destroy(png_ptr, info_ptr); - - if (end_info_ptr != NULL) - png_info_destroy(png_ptr, end_info_ptr); - - png_free(png_ptr, png_ptr->zbuf); - png_free(png_ptr, png_ptr->row_buf); - png_free(png_ptr, png_ptr->prev_row); -#if defined(PNG_READ_DITHER_SUPPORTED) - png_free(png_ptr, png_ptr->palette_lookup); - png_free(png_ptr, png_ptr->dither_index); -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) - png_free(png_ptr, png_ptr->gamma_table); -#endif -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - png_free(png_ptr, png_ptr->gamma_from_1); - png_free(png_ptr, png_ptr->gamma_to_1); -#endif -#ifdef PNG_FREE_ME_SUPPORTED - if (png_ptr->free_me & PNG_FREE_PLTE) - png_zfree(png_ptr, png_ptr->palette); - png_ptr->free_me &= ~PNG_FREE_PLTE; -#else - if (png_ptr->flags & PNG_FLAG_FREE_PLTE) - png_zfree(png_ptr, png_ptr->palette); - png_ptr->flags &= ~PNG_FLAG_FREE_PLTE; -#endif -#if defined(PNG_tRNS_SUPPORTED) || \ - defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) -#ifdef PNG_FREE_ME_SUPPORTED - if (png_ptr->free_me & PNG_FREE_TRNS) - png_free(png_ptr, png_ptr->trans); - png_ptr->free_me &= ~PNG_FREE_TRNS; -#else - if (png_ptr->flags & PNG_FLAG_FREE_TRNS) - png_free(png_ptr, png_ptr->trans); - png_ptr->flags &= ~PNG_FLAG_FREE_TRNS; -#endif -#endif -#if defined(PNG_READ_hIST_SUPPORTED) -#ifdef PNG_FREE_ME_SUPPORTED - if (png_ptr->free_me & PNG_FREE_HIST) - png_free(png_ptr, png_ptr->hist); - png_ptr->free_me &= ~PNG_FREE_HIST; -#else - if (png_ptr->flags & PNG_FLAG_FREE_HIST) - png_free(png_ptr, png_ptr->hist); - png_ptr->flags &= ~PNG_FLAG_FREE_HIST; -#endif -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (png_ptr->gamma_16_table != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_table[i]); - } - png_free(png_ptr, png_ptr->gamma_16_table); - } -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->gamma_16_from_1 != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_from_1[i]); - } - png_free(png_ptr, png_ptr->gamma_16_from_1); - } - if (png_ptr->gamma_16_to_1 != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_to_1[i]); - } - png_free(png_ptr, png_ptr->gamma_16_to_1); - } -#endif -#endif -#if defined(PNG_TIME_RFC1123_SUPPORTED) - png_free(png_ptr, png_ptr->time_buffer); -#endif - - inflateEnd(&png_ptr->zstream); -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED - png_free(png_ptr, png_ptr->save_buffer); -#endif - - /* Save the important info out of the png_struct, in case it is - * being used again. - */ -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(tmp_jmp, png_ptr->jmpbuf, sizeof (jmp_buf)); -#endif - - error_fn = png_ptr->error_fn; - warning_fn = png_ptr->warning_fn; - error_ptr = png_ptr->error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif - - png_memset(png_ptr, 0, sizeof (png_struct)); - - png_ptr->error_fn = error_fn; - png_ptr->warning_fn = warning_fn; - png_ptr->error_ptr = error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr->free_fn = free_fn; -#endif - -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->jmpbuf, tmp_jmp, sizeof (jmp_buf)); -#endif - -} - -void PNGAPI -png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn) -{ - png_ptr->read_row_fn = read_row_fn; -} - -#if defined(PNG_INFO_IMAGE_SUPPORTED) -void PNGAPI -png_read_png(png_structp png_ptr, png_infop info_ptr, - int transforms, - voidp params) -{ - int row; - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) - /* invert the alpha channel from opacity to transparency */ - if (transforms & PNG_TRANSFORM_INVERT_ALPHA) - png_set_invert_alpha(png_ptr); -#endif - - /* The call to png_read_info() gives us all of the information from the - * PNG file before the first IDAT (image data chunk). - */ - png_read_info(png_ptr, info_ptr); - - /* -------------- image transformations start here ------------------- */ - -#if defined(PNG_READ_16_TO_8_SUPPORTED) - /* tell libpng to strip 16 bit/color files down to 8 bits/color */ - if (transforms & PNG_TRANSFORM_STRIP_16) - png_set_strip_16(png_ptr); -#endif - -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) - /* Strip alpha bytes from the input data without combining with the - * background (not recommended). - */ - if (transforms & PNG_TRANSFORM_STRIP_ALPHA) - png_set_strip_alpha(png_ptr); -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) && !defined(PNG_READ_EXPAND_SUPPORTED) - /* Extract multiple pixels with bit depths of 1, 2, and 4 from a single - * byte into separate bytes (useful for paletted and grayscale images). - */ - if (transforms & PNG_TRANSFORM_PACKING) - png_set_packing(png_ptr); -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - /* Change the order of packed pixels to least significant bit first - * (not useful if you are using png_set_packing). */ - if (transforms & PNG_TRANSFORM_PACKSWAP) - png_set_packswap(png_ptr); -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) - /* Expand paletted colors into true RGB triplets - * Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel - * Expand paletted or RGB images with transparency to full alpha - * channels so the data will be available as RGBA quartets. - */ - if (transforms & PNG_TRANSFORM_EXPAND) - if ((png_ptr->bit_depth < 8) || - (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) || - (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))) - png_set_expand(png_ptr); -#endif - - /* We don't handle background color or gamma transformation or dithering. */ - -#if defined(PNG_READ_INVERT_SUPPORTED) - /* invert monochrome files to have 0 as white and 1 as black */ - if (transforms & PNG_TRANSFORM_INVERT_MONO) - png_set_invert_mono(png_ptr); -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) - /* If you want to shift the pixel values from the range [0,255] or - * [0,65535] to the original [0,7] or [0,31], or whatever range the - * colors were originally in: - */ - if ((transforms & PNG_TRANSFORM_SHIFT) - && png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT)) - { - png_color_8p sig_bit; - - png_get_sBIT(png_ptr, info_ptr, &sig_bit); - png_set_shift(png_ptr, sig_bit); - } -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) - /* flip the RGB pixels to BGR (or RGBA to BGRA) */ - if (transforms & PNG_TRANSFORM_BGR) - png_set_bgr(png_ptr); -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) - /* swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */ - if (transforms & PNG_TRANSFORM_SWAP_ALPHA) - png_set_swap_alpha(png_ptr); -#endif - -#if defined(PNG_READ_SWAP_SUPPORTED) - /* swap bytes of 16 bit files to least significant byte first */ - if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) - png_set_swap(png_ptr); -#endif - - /* We don't handle adding filler bytes */ - - /* Optional call to gamma correct and add the background to the palette - * and update info structure. REQUIRED if you are expecting libpng to - * update the palette for you (ie you selected such a transform above). - */ - png_read_update_info(png_ptr, info_ptr); - - /* -------------- image transformations end here ------------------- */ - -#ifdef PNG_FREE_ME_SUPPORTED - png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); -#endif - if(info_ptr->row_pointers == NULL) - { - info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr, - info_ptr->height * sizeof(png_bytep)); -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_ROWS; -#endif - for (row = 0; row < (int)info_ptr->height; row++) - info_ptr->row_pointers[row] = png_malloc(png_ptr, - png_get_rowbytes(png_ptr, info_ptr)); - } - - png_read_image(png_ptr, info_ptr->row_pointers); - info_ptr->valid |= PNG_INFO_IDAT; - - /* read rest of file, and get additional chunks in info_ptr - REQUIRED */ - png_read_end(png_ptr, info_ptr); - - if(transforms == 0 || params == (voidp)NULL) - /* quiet compiler warnings */ return; - -} -#endif diff --git a/libraries/libpng-1.0.9/pngrio.c b/libraries/libpng-1.0.9/pngrio.c deleted file mode 100644 index a1d7af4..0000000 --- a/libraries/libpng-1.0.9/pngrio.c +++ /dev/null @@ -1,162 +0,0 @@ - -/* pngrio.c - functions for data input - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This file provides a location for all input. Users who need - * special handling are expected to write a function that has the same - * arguments as this and performs a similar function, but that possibly - * has a different input method. Note that you shouldn't change this - * function, but rather write a replacement function and then make - * libpng use it at run time with png_set_read_fn(...). - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Read the data from whatever input you are using. The default routine - reads from a file pointer. Note that this routine sometimes gets called - with very small lengths, so you should implement some kind of simple - buffering if you are using unbuffered reads. This should never be asked - to read more then 64K on a 16 bit machine. */ -void /* PRIVATE */ -png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_debug1(4,"reading %d bytes\n", length); - if (png_ptr->read_data_fn != NULL) - (*(png_ptr->read_data_fn))(png_ptr, data, length); - else - png_error(png_ptr, "Call to NULL read function"); -} - -#if !defined(PNG_NO_STDIO) -/* This is the function that does the actual reading of data. If you are - not reading from a standard C stream, you should create a replacement - read_data function and use it at run time with png_set_read_fn(), rather - than changing the library. */ -#ifndef USE_FAR_KEYWORD -static void /* PRIVATE */ -png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_size_t check; - - /* fread() returns 0 on error, so it is OK to store this in a png_size_t - * instead of an int, which is what fread() actually returns. - */ -#if defined(_WIN32_WCE) - if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) ) - check = 0; -#else - check = (png_size_t)fread(data, (png_size_t)1, length, - (png_FILE_p)png_ptr->io_ptr); -#endif - - if (check != length) - png_error(png_ptr, "Read Error"); -} -#else -/* this is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void /* PRIVATE */ -png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - int check; - png_byte *n_data; - png_FILE_p io_ptr; - - /* Check if data really is near. If so, use usual code. */ - n_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); - if ((png_bytep)n_data == data) - { -#if defined(_WIN32_WCE) - if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) ) - check = 0; -#else - check = fread(n_data, 1, length, io_ptr); -#endif - } - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t read, remaining, err; - check = 0; - remaining = length; - do - { - read = MIN(NEAR_BUF_SIZE, remaining); -#if defined(_WIN32_WCE) - if ( !ReadFile((HANDLE)(io_ptr), buf, read, &err, NULL) ) - err = 0; -#else - err = fread(buf, (png_size_t)1, read, io_ptr); -#endif - png_memcpy(data, buf, read); /* copy far buffer to near buffer */ - if(err != read) - break; - else - check += err; - data += read; - remaining -= read; - } - while (remaining != 0); - } - if ((png_uint_32)check != (png_uint_32)length) - png_error(png_ptr, "read Error"); -} -#endif -#endif - -/* This function allows the application to supply a new input function - for libpng if standard C streams aren't being used. - - This function takes as its arguments: - png_ptr - pointer to a png input data structure - io_ptr - pointer to user supplied structure containing info about - the input functions. May be NULL. - read_data_fn - pointer to a new input function that takes as its - arguments a pointer to a png_struct, a pointer to - a location where input data can be stored, and a 32-bit - unsigned int that is the number of bytes to be read. - To exit and output any fatal error messages the new write - function should call png_error(png_ptr, "Error msg"). */ -void PNGAPI -png_set_read_fn(png_structp png_ptr, png_voidp io_ptr, - png_rw_ptr read_data_fn) -{ - png_ptr->io_ptr = io_ptr; - -#if !defined(PNG_NO_STDIO) - if (read_data_fn != NULL) - png_ptr->read_data_fn = read_data_fn; - else - png_ptr->read_data_fn = png_default_read_data; -#else - png_ptr->read_data_fn = read_data_fn; -#endif - - /* It is an error to write to a read device */ - if (png_ptr->write_data_fn != NULL) - { - png_ptr->write_data_fn = NULL; - png_warning(png_ptr, - "It's an error to set both read_data_fn and write_data_fn in the "); - png_warning(png_ptr, - "same structure. Resetting write_data_fn to NULL."); - } - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) - png_ptr->output_flush_fn = NULL; -#endif -} - diff --git a/libraries/libpng-1.0.9/pngrtran.c b/libraries/libpng-1.0.9/pngrtran.c deleted file mode 100644 index 8cc28df..0000000 --- a/libraries/libpng-1.0.9/pngrtran.c +++ /dev/null @@ -1,4115 +0,0 @@ - -/* pngrtran.c - transforms the data in a row for PNG readers - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This file contains functions optionally called by an application - * in order to tell libpng how to handle data when reading a PNG. - * Transformations that are used in both reading and writing are - * in pngtrans.c. - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Set the action on getting a CRC error for an ancillary or critical chunk. */ -void PNGAPI -png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action) -{ - png_debug(1, "in png_set_crc_action\n"); - /* Tell libpng how we react to CRC errors in critical chunks */ - switch (crit_action) - { - case PNG_CRC_NO_CHANGE: /* leave setting as is */ - break; - case PNG_CRC_WARN_USE: /* warn/use data */ - png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK; - png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE; - break; - case PNG_CRC_QUIET_USE: /* quiet/use data */ - png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK; - png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE | - PNG_FLAG_CRC_CRITICAL_IGNORE; - break; - case PNG_CRC_WARN_DISCARD: /* not a valid action for critical data */ - png_warning(png_ptr, "Can't discard critical data on CRC error."); - case PNG_CRC_ERROR_QUIT: /* error/quit */ - case PNG_CRC_DEFAULT: - default: - png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK; - break; - } - - switch (ancil_action) - { - case PNG_CRC_NO_CHANGE: /* leave setting as is */ - break; - case PNG_CRC_WARN_USE: /* warn/use data */ - png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK; - png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE; - break; - case PNG_CRC_QUIET_USE: /* quiet/use data */ - png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK; - png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE | - PNG_FLAG_CRC_ANCILLARY_NOWARN; - break; - case PNG_CRC_ERROR_QUIT: /* error/quit */ - png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK; - png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_NOWARN; - break; - case PNG_CRC_WARN_DISCARD: /* warn/discard data */ - case PNG_CRC_DEFAULT: - default: - png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK; - break; - } -} - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \ - defined(PNG_FLOATING_POINT_SUPPORTED) -/* handle alpha and tRNS via a background color */ -void PNGAPI -png_set_background(png_structp png_ptr, - png_color_16p background_color, int background_gamma_code, - int need_expand, double background_gamma) -{ - png_debug(1, "in png_set_background\n"); - if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN) - { - png_warning(png_ptr, "Application must supply a known background gamma"); - return; - } - - png_ptr->transformations |= PNG_BACKGROUND; - png_memcpy(&(png_ptr->background), background_color, sizeof(png_color_16)); - png_ptr->background_gamma = (float)background_gamma; - png_ptr->background_gamma_type = (png_byte)(background_gamma_code); - png_ptr->transformations |= (need_expand ? PNG_BACKGROUND_EXPAND : 0); - - /* Note: if need_expand is set and color_type is either RGB or RGB_ALPHA - * (in which case need_expand is superfluous anyway), the background color - * might actually be gray yet not be flagged as such. This is not a problem - * for the current code, which uses PNG_BACKGROUND_IS_GRAY only to - * decide when to do the png_do_gray_to_rgb() transformation. - */ - if ((need_expand && !(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) || - (!need_expand && background_color->red == background_color->green && - background_color->red == background_color->blue)) - png_ptr->mode |= PNG_BACKGROUND_IS_GRAY; -} -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) -/* strip 16 bit depth files to 8 bit depth */ -void PNGAPI -png_set_strip_16(png_structp png_ptr) -{ - png_debug(1, "in png_set_strip_16\n"); - png_ptr->transformations |= PNG_16_TO_8; -} -#endif - -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -void PNGAPI -png_set_strip_alpha(png_structp png_ptr) -{ - png_debug(1, "in png_set_strip_alpha\n"); - png_ptr->transformations |= PNG_STRIP_ALPHA; -} -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) -/* Dither file to 8 bit. Supply a palette, the current number - * of elements in the palette, the maximum number of elements - * allowed, and a histogram if possible. If the current number - * of colors is greater then the maximum number, the palette will be - * modified to fit in the maximum number. "full_dither" indicates - * whether we need a dithering cube set up for RGB images, or if we - * simply are reducing the number of colors in a paletted image. - */ - -typedef struct png_dsort_struct -{ - struct png_dsort_struct FAR * next; - png_byte left; - png_byte right; -} png_dsort; -typedef png_dsort FAR * png_dsortp; -typedef png_dsort FAR * FAR * png_dsortpp; - -void PNGAPI -png_set_dither(png_structp png_ptr, png_colorp palette, - int num_palette, int maximum_colors, png_uint_16p histogram, - int full_dither) -{ - png_debug(1, "in png_set_dither\n"); - png_ptr->transformations |= PNG_DITHER; - - if (!full_dither) - { - int i; - - png_ptr->dither_index = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * sizeof (png_byte))); - for (i = 0; i < num_palette; i++) - png_ptr->dither_index[i] = (png_byte)i; - } - - if (num_palette > maximum_colors) - { - if (histogram != NULL) - { - /* This is easy enough, just throw out the least used colors. - Perhaps not the best solution, but good enough. */ - - int i; - png_bytep sort; - - /* initialize an array to sort colors */ - sort = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_palette - * sizeof (png_byte))); - - /* initialize the sort array */ - for (i = 0; i < num_palette; i++) - sort[i] = (png_byte)i; - - /* Find the least used palette entries by starting a - bubble sort, and running it until we have sorted - out enough colors. Note that we don't care about - sorting all the colors, just finding which are - least used. */ - - for (i = num_palette - 1; i >= maximum_colors; i--) - { - int done; /* to stop early if the list is pre-sorted */ - int j; - - done = 1; - for (j = 0; j < i; j++) - { - if (histogram[sort[j]] < histogram[sort[j + 1]]) - { - png_byte t; - - t = sort[j]; - sort[j] = sort[j + 1]; - sort[j + 1] = t; - done = 0; - } - } - if (done) - break; - } - - /* swap the palette around, and set up a table, if necessary */ - if (full_dither) - { - int j = num_palette; - - /* put all the useful colors within the max, but don't - move the others */ - for (i = 0; i < maximum_colors; i++) - { - if ((int)sort[i] >= maximum_colors) - { - do - j--; - while ((int)sort[j] >= maximum_colors); - palette[i] = palette[j]; - } - } - } - else - { - int j = num_palette; - - /* move all the used colors inside the max limit, and - develop a translation table */ - for (i = 0; i < maximum_colors; i++) - { - /* only move the colors we need to */ - if ((int)sort[i] >= maximum_colors) - { - png_color tmp_color; - - do - j--; - while ((int)sort[j] >= maximum_colors); - - tmp_color = palette[j]; - palette[j] = palette[i]; - palette[i] = tmp_color; - /* indicate where the color went */ - png_ptr->dither_index[j] = (png_byte)i; - png_ptr->dither_index[i] = (png_byte)j; - } - } - - /* find closest color for those colors we are not using */ - for (i = 0; i < num_palette; i++) - { - if ((int)png_ptr->dither_index[i] >= maximum_colors) - { - int min_d, k, min_k, d_index; - - /* find the closest color to one we threw out */ - d_index = png_ptr->dither_index[i]; - min_d = PNG_COLOR_DIST(palette[d_index], palette[0]); - for (k = 1, min_k = 0; k < maximum_colors; k++) - { - int d; - - d = PNG_COLOR_DIST(palette[d_index], palette[k]); - - if (d < min_d) - { - min_d = d; - min_k = k; - } - } - /* point to closest color */ - png_ptr->dither_index[i] = (png_byte)min_k; - } - } - } - png_free(png_ptr, sort); - } - else - { - /* This is much harder to do simply (and quickly). Perhaps - we need to go through a median cut routine, but those - don't always behave themselves with only a few colors - as input. So we will just find the closest two colors, - and throw out one of them (chosen somewhat randomly). - [We don't understand this at all, so if someone wants to - work on improving it, be our guest - AED, GRP] - */ - int i; - int max_d; - int num_new_palette; - png_dsortpp hash; - png_bytep index_to_palette; - /* where the original index currently is in the palette */ - png_bytep palette_to_index; - /* which original index points to this palette color */ - - /* initialize palette index arrays */ - index_to_palette = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * sizeof (png_byte))); - palette_to_index = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * sizeof (png_byte))); - - /* initialize the sort array */ - for (i = 0; i < num_palette; i++) - { - index_to_palette[i] = (png_byte)i; - palette_to_index[i] = (png_byte)i; - } - - hash = (png_dsortpp)png_malloc(png_ptr, (png_uint_32)(769 * - sizeof (png_dsortp))); - for (i = 0; i < 769; i++) - hash[i] = NULL; -/* png_memset(hash, 0, 769 * sizeof (png_dsortp)); */ - - num_new_palette = num_palette; - - /* initial wild guess at how far apart the farthest pixel - pair we will be eliminating will be. Larger - numbers mean more areas will be allocated, Smaller - numbers run the risk of not saving enough data, and - having to do this all over again. - - I have not done extensive checking on this number. - */ - max_d = 96; - - while (num_new_palette > maximum_colors) - { - for (i = 0; i < num_new_palette - 1; i++) - { - int j; - - for (j = i + 1; j < num_new_palette; j++) - { - int d; - - d = PNG_COLOR_DIST(palette[i], palette[j]); - - if (d <= max_d) - { - png_dsortp t; - - t = (png_dsortp)png_malloc(png_ptr, (png_uint_32)(sizeof - (png_dsort))); - t->next = hash[d]; - t->left = (png_byte)i; - t->right = (png_byte)j; - hash[d] = t; - } - } - } - - for (i = 0; i <= max_d; i++) - { - if (hash[i] != NULL) - { - png_dsortp p; - - for (p = hash[i]; p; p = p->next) - { - if ((int)index_to_palette[p->left] < num_new_palette && - (int)index_to_palette[p->right] < num_new_palette) - { - int j, next_j; - - if (num_new_palette & 0x01) - { - j = p->left; - next_j = p->right; - } - else - { - j = p->right; - next_j = p->left; - } - - num_new_palette--; - palette[index_to_palette[j]] = palette[num_new_palette]; - if (!full_dither) - { - int k; - - for (k = 0; k < num_palette; k++) - { - if (png_ptr->dither_index[k] == - index_to_palette[j]) - png_ptr->dither_index[k] = - index_to_palette[next_j]; - if ((int)png_ptr->dither_index[k] == - num_new_palette) - png_ptr->dither_index[k] = - index_to_palette[j]; - } - } - - index_to_palette[palette_to_index[num_new_palette]] = - index_to_palette[j]; - palette_to_index[index_to_palette[j]] = - palette_to_index[num_new_palette]; - - index_to_palette[j] = (png_byte)num_new_palette; - palette_to_index[num_new_palette] = (png_byte)j; - } - if (num_new_palette <= maximum_colors) - break; - } - if (num_new_palette <= maximum_colors) - break; - } - } - - for (i = 0; i < 769; i++) - { - if (hash[i] != NULL) - { - png_dsortp p = hash[i]; - while (p) - { - png_dsortp t; - - t = p->next; - png_free(png_ptr, p); - p = t; - } - } - hash[i] = 0; - } - max_d += 96; - } - png_free(png_ptr, hash); - png_free(png_ptr, palette_to_index); - png_free(png_ptr, index_to_palette); - } - num_palette = maximum_colors; - } - if (png_ptr->palette == NULL) - { - png_ptr->palette = palette; - } - png_ptr->num_palette = (png_uint_16)num_palette; - - if (full_dither) - { - int i; - png_bytep distance; - int total_bits = PNG_DITHER_RED_BITS + PNG_DITHER_GREEN_BITS + - PNG_DITHER_BLUE_BITS; - int num_red = (1 << PNG_DITHER_RED_BITS); - int num_green = (1 << PNG_DITHER_GREEN_BITS); - int num_blue = (1 << PNG_DITHER_BLUE_BITS); - png_size_t num_entries = ((png_size_t)1 << total_bits); - - png_ptr->palette_lookup = (png_bytep )png_malloc(png_ptr, - (png_uint_32)(num_entries * sizeof (png_byte))); - - png_memset(png_ptr->palette_lookup, 0, num_entries * sizeof (png_byte)); - - distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries * - sizeof(png_byte))); - - png_memset(distance, 0xff, num_entries * sizeof(png_byte)); - - for (i = 0; i < num_palette; i++) - { - int ir, ig, ib; - int r = (palette[i].red >> (8 - PNG_DITHER_RED_BITS)); - int g = (palette[i].green >> (8 - PNG_DITHER_GREEN_BITS)); - int b = (palette[i].blue >> (8 - PNG_DITHER_BLUE_BITS)); - - for (ir = 0; ir < num_red; ir++) - { - int dr = abs(ir - r); - int index_r = (ir << (PNG_DITHER_BLUE_BITS + PNG_DITHER_GREEN_BITS)); - - for (ig = 0; ig < num_green; ig++) - { - int dg = abs(ig - g); - int dt = dr + dg; - int dm = ((dr > dg) ? dr : dg); - int index_g = index_r | (ig << PNG_DITHER_BLUE_BITS); - - for (ib = 0; ib < num_blue; ib++) - { - int d_index = index_g | ib; - int db = abs(ib - b); - int dmax = ((dm > db) ? dm : db); - int d = dmax + dt + db; - - if (d < (int)distance[d_index]) - { - distance[d_index] = (png_byte)d; - png_ptr->palette_lookup[d_index] = (png_byte)i; - } - } - } - } - } - - png_free(png_ptr, distance); - } -} -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED) -/* Transform the image from the file_gamma to the screen_gamma. We - * only do transformations on images where the file_gamma and screen_gamma - * are not close reciprocals, otherwise it slows things down slightly, and - * also needlessly introduces small errors. - */ -void PNGAPI -png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma) -{ - png_debug(1, "in png_set_gamma\n"); - if (fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD) - png_ptr->transformations |= PNG_GAMMA; - png_ptr->gamma = (float)file_gamma; - png_ptr->screen_gamma = (float)scrn_gamma; -} -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) -/* Expand paletted images to RGB, expand grayscale images of - * less than 8-bit depth to 8-bit depth, and expand tRNS chunks - * to alpha channels. - */ -void PNGAPI -png_set_expand(png_structp png_ptr) -{ - png_debug(1, "in png_set_expand\n"); - png_ptr->transformations |= PNG_EXPAND; -} - -/* GRR 19990627: the following three functions currently are identical - * to png_set_expand(). However, it is entirely reasonable that someone - * might wish to expand an indexed image to RGB but *not* expand a single, - * fully transparent palette entry to a full alpha channel--perhaps instead - * convert tRNS to the grayscale/RGB format (16-bit RGB value), or replace - * the transparent color with a particular RGB value, or drop tRNS entirely. - * IOW, a future version of the library may make the transformations flag - * a bit more fine-grained, with separate bits for each of these three - * functions. - * - * More to the point, these functions make it obvious what libpng will be - * doing, whereas "expand" can (and does) mean any number of things. - */ - -/* Expand paletted images to RGB. */ -void PNGAPI -png_set_palette_to_rgb(png_structp png_ptr) -{ - png_debug(1, "in png_set_expand\n"); - png_ptr->transformations |= PNG_EXPAND; -} - -/* Expand grayscale images of less than 8-bit depth to 8 bits. */ -void PNGAPI -png_set_gray_1_2_4_to_8(png_structp png_ptr) -{ - png_debug(1, "in png_set_expand\n"); - png_ptr->transformations |= PNG_EXPAND; -} - -/* Expand tRNS chunks to alpha channels. */ -void PNGAPI -png_set_tRNS_to_alpha(png_structp png_ptr) -{ - png_debug(1, "in png_set_expand\n"); - png_ptr->transformations |= PNG_EXPAND; -} -#endif /* defined(PNG_READ_EXPAND_SUPPORTED) */ - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) -void PNGAPI -png_set_gray_to_rgb(png_structp png_ptr) -{ - png_debug(1, "in png_set_gray_to_rgb\n"); - png_ptr->transformations |= PNG_GRAY_TO_RGB; -} -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) -#if defined(PNG_FLOATING_POINT_SUPPORTED) -/* Convert a RGB image to a grayscale of the same width. This allows us, - * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image. - */ - -void PNGAPI -png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red, - double green) -{ - int red_fixed = (int)((float)red*100000.0 + 0.5); - int green_fixed = (int)((float)green*100000.0 + 0.5); - png_set_rgb_to_gray_fixed(png_ptr, error_action, red_fixed, green_fixed); -} -#endif - -void PNGAPI -png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, - png_fixed_point red, png_fixed_point green) -{ - png_debug(1, "in png_set_rgb_to_gray\n"); - switch(error_action) - { - case 1: png_ptr->transformations |= PNG_RGB_TO_GRAY; - break; - case 2: png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN; - break; - case 3: png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR; - } - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) -#if defined(PNG_READ_EXPAND_SUPPORTED) - png_ptr->transformations |= PNG_EXPAND; -#else - { - png_warning(png_ptr, "Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED."); - png_ptr->transformations &= ~PNG_RGB_TO_GRAY; - } -#endif - { - png_uint_16 red_int, green_int; - if(red < 0 || green < 0) - { - red_int = 6968; /* .212671 * 32768 + .5 */ - green_int = 23434; /* .715160 * 32768 + .5 */ - } - else if(red + green < 100000L) - { - red_int = (png_uint_16)(((png_uint_32)red*32768L)/100000L); - green_int = (png_uint_16)(((png_uint_32)green*32768L)/100000L); - } - else - { - png_warning(png_ptr, "ignoring out of range rgb_to_gray coefficients"); - red_int = 6968; - green_int = 23434; - } - png_ptr->rgb_to_gray_red_coeff = red_int; - png_ptr->rgb_to_gray_green_coeff = green_int; - png_ptr->rgb_to_gray_blue_coeff = (png_uint_16)(32768-red_int-green_int); - } -} -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_LEGACY_SUPPORTED) -void PNGAPI -png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr - read_user_transform_fn) -{ - png_debug(1, "in png_set_read_user_transform_fn\n"); -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - png_ptr->transformations |= PNG_USER_TRANSFORM; - png_ptr->read_user_transform_fn = read_user_transform_fn; -#endif -#ifdef PNG_LEGACY_SUPPORTED - if(read_user_transform_fn) - png_warning(png_ptr, - "This version of libpng does not support user transforms"); -#endif -} -#endif - -/* Initialize everything needed for the read. This includes modifying - * the palette. - */ -void /* PRIVATE */ -png_init_read_transformations(png_structp png_ptr) -{ - png_debug(1, "in png_init_read_transformations\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if(png_ptr != NULL) -#endif - { -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || defined(PNG_READ_SHIFT_SUPPORTED) \ - || defined(PNG_READ_GAMMA_SUPPORTED) - int color_type = png_ptr->color_type; -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED) - if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) && - (png_ptr->transformations & PNG_EXPAND)) - { - if (!(color_type & PNG_COLOR_MASK_COLOR)) /* i.e., GRAY or GRAY_ALPHA */ - { - /* expand background chunk. */ - switch (png_ptr->bit_depth) - { - case 1: - png_ptr->background.gray *= (png_uint_16)0xff; - png_ptr->background.red = png_ptr->background.green = - png_ptr->background.blue = png_ptr->background.gray; - break; - case 2: - png_ptr->background.gray *= (png_uint_16)0x55; - png_ptr->background.red = png_ptr->background.green = - png_ptr->background.blue = png_ptr->background.gray; - break; - case 4: - png_ptr->background.gray *= (png_uint_16)0x11; - png_ptr->background.red = png_ptr->background.green = - png_ptr->background.blue = png_ptr->background.gray; - break; - case 8: - case 16: - png_ptr->background.red = png_ptr->background.green = - png_ptr->background.blue = png_ptr->background.gray; - break; - } - } - else if (color_type == PNG_COLOR_TYPE_PALETTE) - { - png_ptr->background.red = - png_ptr->palette[png_ptr->background.index].red; - png_ptr->background.green = - png_ptr->palette[png_ptr->background.index].green; - png_ptr->background.blue = - png_ptr->palette[png_ptr->background.index].blue; - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_ALPHA) - { -#if defined(PNG_READ_EXPAND_SUPPORTED) - if (!(png_ptr->transformations & PNG_EXPAND)) -#endif - { - /* invert the alpha channel (in tRNS) unless the pixels are - going to be expanded, in which case leave it for later */ - int i,istop; - istop=(int)png_ptr->num_trans; - for (i=0; itrans[i] = (png_byte)(255 - png_ptr->trans[i]); - } - } -#endif - - } - } -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - png_ptr->background_1 = png_ptr->background; -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED) - if (png_ptr->transformations & (PNG_GAMMA | PNG_RGB_TO_GRAY)) - { - png_build_gamma_table(png_ptr); -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->transformations & PNG_BACKGROUND) - { - if (color_type == PNG_COLOR_TYPE_PALETTE) - { - png_color back, back_1; - png_colorp palette = png_ptr->palette; - int num_palette = png_ptr->num_palette; - int i; - if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE) - { - back.red = png_ptr->gamma_table[png_ptr->background.red]; - back.green = png_ptr->gamma_table[png_ptr->background.green]; - back.blue = png_ptr->gamma_table[png_ptr->background.blue]; - - back_1.red = png_ptr->gamma_to_1[png_ptr->background.red]; - back_1.green = png_ptr->gamma_to_1[png_ptr->background.green]; - back_1.blue = png_ptr->gamma_to_1[png_ptr->background.blue]; - } - else - { - double g, gs; - - switch (png_ptr->background_gamma_type) - { - case PNG_BACKGROUND_GAMMA_SCREEN: - g = (png_ptr->screen_gamma); - gs = 1.0; - break; - case PNG_BACKGROUND_GAMMA_FILE: - g = 1.0 / (png_ptr->gamma); - gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - break; - case PNG_BACKGROUND_GAMMA_UNIQUE: - g = 1.0 / (png_ptr->background_gamma); - gs = 1.0 / (png_ptr->background_gamma * - png_ptr->screen_gamma); - break; - default: - g = 1.0; /* back_1 */ - gs = 1.0; /* back */ - } - - if ( fabs(gs - 1.0) < PNG_GAMMA_THRESHOLD) - { - back.red = (png_byte)png_ptr->background.red; - back.green = (png_byte)png_ptr->background.green; - back.blue = (png_byte)png_ptr->background.blue; - } - else - { - back.red = (png_byte)(pow( - (double)png_ptr->background.red/255, gs) * 255.0 + .5); - back.green = (png_byte)(pow( - (double)png_ptr->background.green/255, gs) * 255.0 + .5); - back.blue = (png_byte)(pow( - (double)png_ptr->background.blue/255, gs) * 255.0 + .5); - } - - back_1.red = (png_byte)(pow( - (double)png_ptr->background.red/255, g) * 255.0 + .5); - back_1.green = (png_byte)(pow( - (double)png_ptr->background.green/255, g) * 255.0 + .5); - back_1.blue = (png_byte)(pow( - (double)png_ptr->background.blue/255, g) * 255.0 + .5); - } - for (i = 0; i < num_palette; i++) - { - if (i < (int)png_ptr->num_trans && png_ptr->trans[i] != 0xff) - { - if (png_ptr->trans[i] == 0) - { - palette[i] = back; - } - else /* if (png_ptr->trans[i] != 0xff) */ - { - png_byte v, w; - - v = png_ptr->gamma_to_1[palette[i].red]; - png_composite(w, v, png_ptr->trans[i], back_1.red); - palette[i].red = png_ptr->gamma_from_1[w]; - - v = png_ptr->gamma_to_1[palette[i].green]; - png_composite(w, v, png_ptr->trans[i], back_1.green); - palette[i].green = png_ptr->gamma_from_1[w]; - - v = png_ptr->gamma_to_1[palette[i].blue]; - png_composite(w, v, png_ptr->trans[i], back_1.blue); - palette[i].blue = png_ptr->gamma_from_1[w]; - } - } - else - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } - } - /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN)*/ - else - /* color_type != PNG_COLOR_TYPE_PALETTE */ - { - double m = (double)(((png_uint_32)1 << png_ptr->bit_depth) - 1); - double g = 1.0; - double gs = 1.0; - - switch (png_ptr->background_gamma_type) - { - case PNG_BACKGROUND_GAMMA_SCREEN: - g = (png_ptr->screen_gamma); - gs = 1.0; - break; - case PNG_BACKGROUND_GAMMA_FILE: - g = 1.0 / (png_ptr->gamma); - gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - break; - case PNG_BACKGROUND_GAMMA_UNIQUE: - g = 1.0 / (png_ptr->background_gamma); - gs = 1.0 / (png_ptr->background_gamma * - png_ptr->screen_gamma); - break; - } - - if (color_type & PNG_COLOR_MASK_COLOR) - { - /* RGB or RGBA */ - png_ptr->background_1.red = (png_uint_16)(pow( - (double)png_ptr->background.red / m, g) * m + .5); - png_ptr->background_1.green = (png_uint_16)(pow( - (double)png_ptr->background.green / m, g) * m + .5); - png_ptr->background_1.blue = (png_uint_16)(pow( - (double)png_ptr->background.blue / m, g) * m + .5); - png_ptr->background.red = (png_uint_16)(pow( - (double)png_ptr->background.red / m, gs) * m + .5); - png_ptr->background.green = (png_uint_16)(pow( - (double)png_ptr->background.green / m, gs) * m + .5); - png_ptr->background.blue = (png_uint_16)(pow( - (double)png_ptr->background.blue / m, gs) * m + .5); - } - else - { - /* GRAY or GRAY ALPHA */ - png_ptr->background_1.gray = (png_uint_16)(pow( - (double)png_ptr->background.gray / m, g) * m + .5); - png_ptr->background.gray = (png_uint_16)(pow( - (double)png_ptr->background.gray / m, gs) * m + .5); - } - } - } - else - /* transformation does not include PNG_BACKGROUND */ -#endif - if (color_type == PNG_COLOR_TYPE_PALETTE) - { - png_colorp palette = png_ptr->palette; - int num_palette = png_ptr->num_palette; - int i; - - for (i = 0; i < num_palette; i++) - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } - } -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - else -#endif -#endif -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - /* No GAMMA transformation */ - if ((png_ptr->transformations & PNG_BACKGROUND) && - (color_type == PNG_COLOR_TYPE_PALETTE)) - { - int i; - int istop = (int)png_ptr->num_trans; - png_color back; - png_colorp palette = png_ptr->palette; - - back.red = (png_byte)png_ptr->background.red; - back.green = (png_byte)png_ptr->background.green; - back.blue = (png_byte)png_ptr->background.blue; - - for (i = 0; i < istop; i++) - { - if (png_ptr->trans[i] == 0) - { - palette[i] = back; - } - else if (png_ptr->trans[i] != 0xff) - { - /* The png_composite() macro is defined in png.h */ - png_composite(palette[i].red, palette[i].red, - png_ptr->trans[i], back.red); - png_composite(palette[i].green, palette[i].green, - png_ptr->trans[i], back.green); - png_composite(palette[i].blue, palette[i].blue, - png_ptr->trans[i], back.blue); - } - } - } -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) - if ((png_ptr->transformations & PNG_SHIFT) && - (color_type == PNG_COLOR_TYPE_PALETTE)) - { - png_uint_16 i; - png_uint_16 istop = png_ptr->num_palette; - int sr = 8 - png_ptr->sig_bit.red; - int sg = 8 - png_ptr->sig_bit.green; - int sb = 8 - png_ptr->sig_bit.blue; - - if (sr < 0 || sr > 8) - sr = 0; - if (sg < 0 || sg > 8) - sg = 0; - if (sb < 0 || sb > 8) - sb = 0; - for (i = 0; i < istop; i++) - { - png_ptr->palette[i].red >>= sr; - png_ptr->palette[i].green >>= sg; - png_ptr->palette[i].blue >>= sb; - } - } -#endif - } -#if !defined(PNG_READ_GAMMA_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) \ - && !defined(PNG_READ_BACKGROUND_SUPPORTED) - if(png_ptr) - return; -#endif -} - -/* Modify the info structure to reflect the transformations. The - * info should be updated so a PNG file could be written with it, - * assuming the transformations result in valid PNG data. - */ -void /* PRIVATE */ -png_read_transform_info(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_read_transform_info\n"); -#if defined(PNG_READ_EXPAND_SUPPORTED) - if (png_ptr->transformations & PNG_EXPAND) - { - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (png_ptr->num_trans) - info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA; - else - info_ptr->color_type = PNG_COLOR_TYPE_RGB; - info_ptr->bit_depth = 8; - info_ptr->num_trans = 0; - } - else - { - if (png_ptr->num_trans) - info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; - if (info_ptr->bit_depth < 8) - info_ptr->bit_depth = 8; - info_ptr->num_trans = 0; - } - } -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->transformations & PNG_BACKGROUND) - { - info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA; - info_ptr->num_trans = 0; - info_ptr->background = png_ptr->background; - } -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (png_ptr->transformations & PNG_GAMMA) - { -#ifdef PNG_FLOATING_POINT_SUPPORTED - info_ptr->gamma = png_ptr->gamma; -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = png_ptr->int_gamma; -#endif - } -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) - if ((png_ptr->transformations & PNG_16_TO_8) && (info_ptr->bit_depth == 16)) - info_ptr->bit_depth = 8; -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) - if (png_ptr->transformations & PNG_DITHER) - { - if (((info_ptr->color_type == PNG_COLOR_TYPE_RGB) || - (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)) && - png_ptr->palette_lookup && info_ptr->bit_depth == 8) - { - info_ptr->color_type = PNG_COLOR_TYPE_PALETTE; - } - } -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) - if ((png_ptr->transformations & PNG_PACK) && (info_ptr->bit_depth < 8)) - info_ptr->bit_depth = 8; -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) - if (png_ptr->transformations & PNG_GRAY_TO_RGB) - info_ptr->color_type |= PNG_COLOR_MASK_COLOR; -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & PNG_RGB_TO_GRAY) - info_ptr->color_type &= ~PNG_COLOR_MASK_COLOR; -#endif - - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - info_ptr->channels = 1; - else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) - info_ptr->channels = 3; - else - info_ptr->channels = 1; - -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_STRIP_ALPHA) - info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA; -#endif - - if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) - info_ptr->channels++; - -#if defined(PNG_READ_FILLER_SUPPORTED) - /* STRIP_ALPHA and FILLER allowed: MASK_ALPHA bit stripped above */ - if ((png_ptr->transformations & PNG_FILLER) && - ((info_ptr->color_type == PNG_COLOR_TYPE_RGB) || - (info_ptr->color_type == PNG_COLOR_TYPE_GRAY))) - { - info_ptr->channels++; -#if 0 /* if adding a true alpha channel not just filler */ - info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; -#endif - } -#endif - -#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) && \ -defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - if(png_ptr->transformations & PNG_USER_TRANSFORM) - { - if(info_ptr->bit_depth < png_ptr->user_transform_depth) - info_ptr->bit_depth = png_ptr->user_transform_depth; - if(info_ptr->channels < png_ptr->user_transform_channels) - info_ptr->channels = png_ptr->user_transform_channels; - } -#endif - - info_ptr->pixel_depth = (png_byte)(info_ptr->channels * - info_ptr->bit_depth); - info_ptr->rowbytes = ((info_ptr->width * info_ptr->pixel_depth + 7) >> 3); - -#if !defined(PNG_READ_EXPAND_SUPPORTED) - if(png_ptr) - return; -#endif -} - -/* Transform the row. The order of transformations is significant, - * and is very touchy. If you add a transformation, take care to - * decide how it fits in with the other transformations here. - */ -void /* PRIVATE */ -png_do_read_transformations(png_structp png_ptr) -{ - png_debug(1, "in png_do_read_transformations\n"); -#if !defined(PNG_USELESS_TESTS_SUPPORTED) - if (png_ptr->row_buf == NULL) - { -#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) - char msg[50]; - - sprintf(msg, "NULL row buffer for row %ld, pass %d", png_ptr->row_number, - png_ptr->pass); - png_error(png_ptr, msg); -#else - png_error(png_ptr, "NULL row buffer"); -#endif - } -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) - if (png_ptr->transformations & PNG_EXPAND) - { - if (png_ptr->row_info.color_type == PNG_COLOR_TYPE_PALETTE) - { - png_do_expand_palette(&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->palette, png_ptr->trans, png_ptr->num_trans); - } - else - { - if (png_ptr->num_trans) - png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->trans_values)); - else - png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1, - NULL); - } - } -#endif - -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_STRIP_ALPHA) - png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1, - PNG_FLAG_FILLER_AFTER); -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & PNG_RGB_TO_GRAY) - { - int rgb_error = - png_do_rgb_to_gray(png_ptr, &(png_ptr->row_info), png_ptr->row_buf + 1); - if(rgb_error) - { - png_ptr->rgb_to_gray_status=1; - if(png_ptr->transformations == PNG_RGB_TO_GRAY_WARN) - png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel"); - if(png_ptr->transformations == PNG_RGB_TO_GRAY_ERR) - png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel"); - } - } -#endif - -/* -From Andreas Dilger e-mail to png-implement, 26 March 1998: - - In most cases, the "simple transparency" should be done prior to doing - gray-to-RGB, or you will have to test 3x as many bytes to check if a - pixel is transparent. You would also need to make sure that the - transparency information is upgraded to RGB. - - To summarize, the current flow is: - - Gray + simple transparency -> compare 1 or 2 gray bytes and composite - with background "in place" if transparent, - convert to RGB if necessary - - Gray + alpha -> composite with gray background and remove alpha bytes, - convert to RGB if necessary - - To support RGB backgrounds for gray images we need: - - Gray + simple transparency -> convert to RGB + simple transparency, compare - 3 or 6 bytes and composite with background - "in place" if transparent (3x compare/pixel - compared to doing composite with gray bkgrnd) - - Gray + alpha -> convert to RGB + alpha, composite with background and - remove alpha bytes (3x float operations/pixel - compared with composite on gray background) - - Greg's change will do this. The reason it wasn't done before is for - performance, as this increases the per-pixel operations. If we would check - in advance if the background was gray or RGB, and position the gray-to-RGB - transform appropriately, then it would save a lot of work/time. - */ - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) - /* if gray -> RGB, do so now only if background is non-gray; else do later - * for performance reasons */ - if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && - !(png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) - png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if ((png_ptr->transformations & PNG_BACKGROUND) && - ((png_ptr->num_trans != 0 ) || - (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) - png_do_background(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->trans_values), &(png_ptr->background), - &(png_ptr->background_1), - png_ptr->gamma_table, png_ptr->gamma_from_1, - png_ptr->gamma_to_1, png_ptr->gamma_16_table, - png_ptr->gamma_16_from_1, png_ptr->gamma_16_to_1, - png_ptr->gamma_shift); -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) - if ((png_ptr->transformations & PNG_GAMMA) && -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - !((png_ptr->transformations & PNG_BACKGROUND) && - ((png_ptr->num_trans != 0) || - (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) && -#endif - (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)) - png_do_gamma(&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->gamma_table, png_ptr->gamma_16_table, - png_ptr->gamma_shift); -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) - if (png_ptr->transformations & PNG_16_TO_8) - png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) - if (png_ptr->transformations & PNG_DITHER) - { - png_do_dither((png_row_infop)&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->palette_lookup, png_ptr->dither_index); - if(png_ptr->row_info.rowbytes == (png_uint_32)0) - png_error(png_ptr, "png_do_dither returned rowbytes=0"); - } -#endif - -#if defined(PNG_READ_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) - png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) - png_do_unshift(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->shift)); -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) - png_do_unpack(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) - png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) - /* if gray -> RGB, do so now only if we did not do so above */ - if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && - (png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) - png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) - png_do_read_filler(&(png_ptr->row_info), png_ptr->row_buf + 1, - (png_uint_32)png_ptr->filler, png_ptr->flags); -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_ALPHA) - png_do_read_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_ALPHA) - png_do_read_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - if (png_ptr->transformations & PNG_USER_TRANSFORM) - { - if(png_ptr->read_user_transform_fn != NULL) - (*(png_ptr->read_user_transform_fn)) /* user read transform function */ - (png_ptr, /* png_ptr */ - &(png_ptr->row_info), /* row_info: */ - /* png_uint_32 width; width of row */ - /* png_uint_32 rowbytes; number of bytes in row */ - /* png_byte color_type; color type of pixels */ - /* png_byte bit_depth; bit depth of samples */ - /* png_byte channels; number of channels (1-4) */ - /* png_byte pixel_depth; bits per pixel (depth*channels) */ - png_ptr->row_buf + 1); /* start of pixel data for row */ -#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) - if(png_ptr->user_transform_depth) - png_ptr->row_info.bit_depth = png_ptr->user_transform_depth; - if(png_ptr->user_transform_channels) - png_ptr->row_info.channels = png_ptr->user_transform_channels; -#endif - png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth * - png_ptr->row_info.channels); - png_ptr->row_info.rowbytes = (png_ptr->row_info.width * - png_ptr->row_info.pixel_depth+7)>>3; - } -#endif - -} - -#if defined(PNG_READ_PACK_SUPPORTED) -/* Unpack pixels of 1, 2, or 4 bits per pixel into 1 byte per pixel, - * without changing the actual values. Thus, if you had a row with - * a bit depth of 1, you would end up with bytes that only contained - * the numbers 0 or 1. If you would rather they contain 0 and 255, use - * png_do_shift() after this. - */ -void /* PRIVATE */ -png_do_unpack(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_unpack\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL && row_info->bit_depth < 8) -#else - if (row_info->bit_depth < 8) -#endif - { - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - switch (row_info->bit_depth) - { - case 1: - { - png_bytep sp = row + (png_size_t)((row_width - 1) >> 3); - png_bytep dp = row + (png_size_t)row_width - 1; - png_uint_32 shift = 7 - (int)((row_width + 7) & 0x07); - for (i = 0; i < row_width; i++) - { - *dp = (png_byte)((*sp >> shift) & 0x01); - if (shift == 7) - { - shift = 0; - sp--; - } - else - shift++; - - dp--; - } - break; - } - case 2: - { - - png_bytep sp = row + (png_size_t)((row_width - 1) >> 2); - png_bytep dp = row + (png_size_t)row_width - 1; - png_uint_32 shift = (int)((3 - ((row_width + 3) & 0x03)) << 1); - for (i = 0; i < row_width; i++) - { - *dp = (png_byte)((*sp >> shift) & 0x03); - if (shift == 6) - { - shift = 0; - sp--; - } - else - shift += 2; - - dp--; - } - break; - } - case 4: - { - png_bytep sp = row + (png_size_t)((row_width - 1) >> 1); - png_bytep dp = row + (png_size_t)row_width - 1; - png_uint_32 shift = (int)((1 - ((row_width + 1) & 0x01)) << 2); - for (i = 0; i < row_width; i++) - { - *dp = (png_byte)((*sp >> shift) & 0x0f); - if (shift == 4) - { - shift = 0; - sp--; - } - else - shift = 4; - - dp--; - } - break; - } - } - row_info->bit_depth = 8; - row_info->pixel_depth = (png_byte)(8 * row_info->channels); - row_info->rowbytes = row_width * row_info->channels; - } -} -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) -/* Reverse the effects of png_do_shift. This routine merely shifts the - * pixels back to their significant bits values. Thus, if you have - * a row of bit depth 8, but only 5 are significant, this will shift - * the values back to 0 through 31. - */ -void /* PRIVATE */ -png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits) -{ - png_debug(1, "in png_do_unshift\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && sig_bits != NULL && -#endif - row_info->color_type != PNG_COLOR_TYPE_PALETTE) - { - int shift[4]; - int channels = 0; - int c; - png_uint_16 value = 0; - png_uint_32 row_width = row_info->width; - - if (row_info->color_type & PNG_COLOR_MASK_COLOR) - { - shift[channels++] = row_info->bit_depth - sig_bits->red; - shift[channels++] = row_info->bit_depth - sig_bits->green; - shift[channels++] = row_info->bit_depth - sig_bits->blue; - } - else - { - shift[channels++] = row_info->bit_depth - sig_bits->gray; - } - if (row_info->color_type & PNG_COLOR_MASK_ALPHA) - { - shift[channels++] = row_info->bit_depth - sig_bits->alpha; - } - - for (c = 0; c < channels; c++) - { - if (shift[c] <= 0) - shift[c] = 0; - else - value = 1; - } - - if (!value) - return; - - switch (row_info->bit_depth) - { - case 2: - { - png_bytep bp; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - - for (bp = row, i = 0; i < istop; i++) - { - *bp >>= 1; - *bp++ &= 0x55; - } - break; - } - case 4: - { - png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_byte mask = (png_byte)((((int)0xf0 >> shift[0]) & (int)0xf0) | - (png_byte)((int)0xf >> shift[0])); - - for (i = 0; i < istop; i++) - { - *bp >>= shift[0]; - *bp++ &= mask; - } - break; - } - case 8: - { - png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = row_width * channels; - - for (i = 0; i < istop; i++) - { - *bp++ >>= shift[i%channels]; - } - break; - } - case 16: - { - png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = channels * row_width; - - for (i = 0; i < istop; i++) - { - value = (png_uint_16)((*bp << 8) + *(bp + 1)); - value >>= shift[i%channels]; - *bp++ = (png_byte)(value >> 8); - *bp++ = (png_byte)(value & 0xff); - } - break; - } - } - } -} -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) -/* chop rows of bit depth 16 down to 8 */ -void /* PRIVATE */ -png_do_chop(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_chop\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL && row_info->bit_depth == 16) -#else - if (row_info->bit_depth == 16) -#endif - { - png_bytep sp = row; - png_bytep dp = row; - png_uint_32 i; - png_uint_32 istop = row_info->width * row_info->channels; - - for (i = 0; i> 8)) >> 8; - * - * Approximate calculation with shift/add instead of multiply/divide: - * *dp = ((((png_uint_32)(*sp) << 8) | - * (png_uint_32)((int)(*(sp + 1)) - *sp)) + 128) >> 8; - * - * What we actually do to avoid extra shifting and conversion: - */ - - *dp = *sp + ((((int)(*(sp + 1)) - *sp) > 128) ? 1 : 0); -#else - /* Simply discard the low order byte */ - *dp = *sp; -#endif - } - row_info->bit_depth = 8; - row_info->pixel_depth = (png_byte)(8 * row_info->channels); - row_info->rowbytes = row_info->width * row_info->channels; - } -} -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) -void /* PRIVATE */ -png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_read_swap_alpha\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - png_uint_32 row_width = row_info->width; - if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - /* This converts from RGBA to ARGB */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_byte save; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - save = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = save; - } - } - /* This converts from RRGGBBAA to AARRGGBB */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_byte save[2]; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - save[0] = *(--sp); - save[1] = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = save[0]; - *(--dp) = save[1]; - } - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - /* This converts from GA to AG */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_byte save; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - save = *(--sp); - *(--dp) = *(--sp); - *(--dp) = save; - } - } - /* This converts from GGAA to AAGG */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_byte save[2]; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - save[0] = *(--sp); - save[1] = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = save[0]; - *(--dp) = save[1]; - } - } - } - } -} -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) -void /* PRIVATE */ -png_do_read_invert_alpha(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_read_invert_alpha\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - png_uint_32 row_width = row_info->width; - if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - /* This inverts the alpha channel in RGBA */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - *(--dp) = (png_byte)(255 - *(--sp)); - -/* This does nothing: - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - We can replace it with: -*/ - sp-=3; - dp=sp; - } - } - /* This inverts the alpha channel in RRGGBBAA */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - *(--dp) = (png_byte)(255 - *(--sp)); - *(--dp) = (png_byte)(255 - *(--sp)); - -/* This does nothing: - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - We can replace it with: -*/ - sp-=6; - dp=sp; - } - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - /* This inverts the alpha channel in GA */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - *(--dp) = (png_byte)(255 - *(--sp)); - *(--dp) = *(--sp); - } - } - /* This inverts the alpha channel in GGAA */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - *(--dp) = (png_byte)(255 - *(--sp)); - *(--dp) = (png_byte)(255 - *(--sp)); -/* - *(--dp) = *(--sp); - *(--dp) = *(--sp); -*/ - sp-=2; - dp=sp; - } - } - } - } -} -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) -/* Add filler channel if we have RGB color */ -void /* PRIVATE */ -png_do_read_filler(png_row_infop row_info, png_bytep row, - png_uint_32 filler, png_uint_32 flags) -{ - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - png_byte hi_filler = (png_byte)((filler>>8) & 0xff); - png_byte lo_filler = (png_byte)(filler & 0xff); - - png_debug(1, "in png_do_read_filler\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->color_type == PNG_COLOR_TYPE_GRAY) - { - if(row_info->bit_depth == 8) - { - /* This changes the data from G to GX */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - png_bytep sp = row + (png_size_t)row_width; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 1; i < row_width; i++) - { - *(--dp) = lo_filler; - *(--dp) = *(--sp); - } - *(--dp) = lo_filler; - row_info->channels = 2; - row_info->pixel_depth = 16; - row_info->rowbytes = row_width * 2; - } - /* This changes the data from G to XG */ - else - { - png_bytep sp = row + (png_size_t)row_width; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 0; i < row_width; i++) - { - *(--dp) = *(--sp); - *(--dp) = lo_filler; - } - row_info->channels = 2; - row_info->pixel_depth = 16; - row_info->rowbytes = row_width * 2; - } - } - else if(row_info->bit_depth == 16) - { - /* This changes the data from GG to GGXX */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - png_bytep sp = row + (png_size_t)row_width; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 1; i < row_width; i++) - { - *(--dp) = hi_filler; - *(--dp) = lo_filler; - *(--dp) = *(--sp); - *(--dp) = *(--sp); - } - *(--dp) = hi_filler; - *(--dp) = lo_filler; - row_info->channels = 2; - row_info->pixel_depth = 32; - row_info->rowbytes = row_width * 4; - } - /* This changes the data from GG to XXGG */ - else - { - png_bytep sp = row + (png_size_t)row_width; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 0; i < row_width; i++) - { - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = hi_filler; - *(--dp) = lo_filler; - } - row_info->channels = 2; - row_info->pixel_depth = 32; - row_info->rowbytes = row_width * 4; - } - } - } /* COLOR_TYPE == GRAY */ - else if (row_info->color_type == PNG_COLOR_TYPE_RGB) - { - if(row_info->bit_depth == 8) - { - /* This changes the data from RGB to RGBX */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - png_bytep sp = row + (png_size_t)row_width * 3; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 1; i < row_width; i++) - { - *(--dp) = lo_filler; - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - } - *(--dp) = lo_filler; - row_info->channels = 4; - row_info->pixel_depth = 32; - row_info->rowbytes = row_width * 4; - } - /* This changes the data from RGB to XRGB */ - else - { - png_bytep sp = row + (png_size_t)row_width * 3; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 0; i < row_width; i++) - { - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = lo_filler; - } - row_info->channels = 4; - row_info->pixel_depth = 32; - row_info->rowbytes = row_width * 4; - } - } - else if(row_info->bit_depth == 16) - { - /* This changes the data from RRGGBB to RRGGBBXX */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - png_bytep sp = row + (png_size_t)row_width * 3; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 1; i < row_width; i++) - { - *(--dp) = hi_filler; - *(--dp) = lo_filler; - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - } - *(--dp) = hi_filler; - *(--dp) = lo_filler; - row_info->channels = 4; - row_info->pixel_depth = 64; - row_info->rowbytes = row_width * 8; - } - /* This changes the data from RRGGBB to XXRRGGBB */ - else - { - png_bytep sp = row + (png_size_t)row_width * 3; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 0; i < row_width; i++) - { - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = hi_filler; - *(--dp) = lo_filler; - } - row_info->channels = 4; - row_info->pixel_depth = 64; - row_info->rowbytes = row_width * 8; - } - } - } /* COLOR_TYPE == RGB */ -} -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) -/* expand grayscale files to RGB, with or without alpha */ -void /* PRIVATE */ -png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) -{ - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - png_debug(1, "in png_do_gray_to_rgb\n"); - if (row_info->bit_depth >= 8 && -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - !(row_info->color_type & PNG_COLOR_MASK_COLOR)) - { - if (row_info->color_type == PNG_COLOR_TYPE_GRAY) - { - if (row_info->bit_depth == 8) - { - png_bytep sp = row + (png_size_t)row_width - 1; - png_bytep dp = sp + (png_size_t)row_width * 2; - for (i = 0; i < row_width; i++) - { - *(dp--) = *sp; - *(dp--) = *sp; - *(dp--) = *(sp--); - } - } - else - { - png_bytep sp = row + (png_size_t)row_width * 2 - 1; - png_bytep dp = sp + (png_size_t)row_width * 4; - for (i = 0; i < row_width; i++) - { - *(dp--) = *sp; - *(dp--) = *(sp - 1); - *(dp--) = *sp; - *(dp--) = *(sp - 1); - *(dp--) = *(sp--); - *(dp--) = *(sp--); - } - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - if (row_info->bit_depth == 8) - { - png_bytep sp = row + (png_size_t)row_width * 2 - 1; - png_bytep dp = sp + (png_size_t)row_width * 2; - for (i = 0; i < row_width; i++) - { - *(dp--) = *(sp--); - *(dp--) = *sp; - *(dp--) = *sp; - *(dp--) = *(sp--); - } - } - else - { - png_bytep sp = row + (png_size_t)row_width * 4 - 1; - png_bytep dp = sp + (png_size_t)row_width * 4; - for (i = 0; i < row_width; i++) - { - *(dp--) = *(sp--); - *(dp--) = *(sp--); - *(dp--) = *sp; - *(dp--) = *(sp - 1); - *(dp--) = *sp; - *(dp--) = *(sp - 1); - *(dp--) = *(sp--); - *(dp--) = *(sp--); - } - } - } - row_info->channels += (png_byte)2; - row_info->color_type |= PNG_COLOR_MASK_COLOR; - row_info->pixel_depth = (png_byte)(row_info->channels * - row_info->bit_depth); - row_info->rowbytes = ((row_width * - row_info->pixel_depth + 7) >> 3); - } -} -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) -/* reduce RGB files to grayscale, with or without alpha - * using the equation given in Poynton's ColorFAQ at - * - * Copyright (c) 1998-01-04 Charles Poynton poynton@inforamp.net - * - * Y = 0.212671 * R + 0.715160 * G + 0.072169 * B - * - * We approximate this with - * - * Y = 0.21268 * R + 0.7151 * G + 0.07217 * B - * - * which can be expressed with integers as - * - * Y = (6969 * R + 23434 * G + 2365 * B)/32768 - * - * The calculation is to be done in a linear colorspace. - * - * Other integer coefficents can be used via png_set_rgb_to_gray(). - */ -int /* PRIVATE */ -png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) - -{ - png_uint_32 i; - - png_uint_32 row_width = row_info->width; - int rgb_error = 0; - - png_debug(1, "in png_do_rgb_to_gray\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - (row_info->color_type & PNG_COLOR_MASK_COLOR)) - { - png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff; - png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff; - png_uint_32 bc = png_ptr->rgb_to_gray_blue_coeff; - - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - { - if (row_info->bit_depth == 8) - { -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL) - { - png_bytep sp = row; - png_bytep dp = row; - - for (i = 0; i < row_width; i++) - { - png_byte red = png_ptr->gamma_to_1[*(sp++)]; - png_byte green = png_ptr->gamma_to_1[*(sp++)]; - png_byte blue = png_ptr->gamma_to_1[*(sp++)]; - if(red != green || red != blue) - { - rgb_error |= 1; - *(dp++) = png_ptr->gamma_from_1[ - (rc*red+gc*green+bc*blue)>>15]; - } - else - *(dp++) = *(sp-1); - } - } - else -#endif - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) - { - png_byte red = *(sp++); - png_byte green = *(sp++); - png_byte blue = *(sp++); - if(red != green || red != blue) - { - rgb_error |= 1; - *(dp++) = (png_byte)((rc*red+gc*green+bc*blue)>>15); - } - else - *(dp++) = *(sp-1); - } - } - } - - else /* RGB bit_depth == 16 */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->gamma_16_to_1 != NULL && - png_ptr->gamma_16_from_1 != NULL) - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 red, green, blue, w; - - red = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - blue = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - - if(red == green && red == blue) - w = red; - else - { - png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) >> - png_ptr->gamma_shift][red>>8]; - png_uint_16 green_1 = png_ptr->gamma_16_to_1[(green&0xff) >> - png_ptr->gamma_shift][green>>8]; - png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) >> - png_ptr->gamma_shift][blue>>8]; - png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1 - + bc*blue_1)>>15); - w = png_ptr->gamma_16_from_1[(gray16&0xff) >> - png_ptr->gamma_shift][gray16 >> 8]; - rgb_error |= 1; - } - - *(dp++) = (png_byte)((w>>8) & 0xff); - *(dp++) = (png_byte)(w & 0xff); - } - } - else -#endif - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 red, green, blue, gray16; - - red = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - blue = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - - if(red != green || red != blue) - rgb_error |= 1; - gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15); - *(dp++) = (png_byte)((gray16>>8) & 0xff); - *(dp++) = (png_byte)(gray16 & 0xff); - } - } - } - } - if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - if (row_info->bit_depth == 8) - { -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL) - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) - { - png_byte red = png_ptr->gamma_to_1[*(sp++)]; - png_byte green = png_ptr->gamma_to_1[*(sp++)]; - png_byte blue = png_ptr->gamma_to_1[*(sp++)]; - if(red != green || red != blue) - rgb_error |= 1; - *(dp++) = png_ptr->gamma_from_1 - [(rc*red + gc*green + bc*blue)>>15]; - *(dp++) = *(sp++); /* alpha */ - } - } - else -#endif - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) - { - png_byte red = *(sp++); - png_byte green = *(sp++); - png_byte blue = *(sp++); - if(red != green || red != blue) - rgb_error |= 1; - *(dp++) = (png_byte)((gc*red + gc*green + bc*blue)>>8); - *(dp++) = *(sp++); /* alpha */ - } - } - } - else /* RGBA bit_depth == 16 */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->gamma_16_to_1 != NULL && - png_ptr->gamma_16_from_1 != NULL) - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 red, green, blue, w; - - red = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - blue = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2; - - if(red == green && red == blue) - w = red; - else - { - png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) >> - png_ptr->gamma_shift][red>>8]; - png_uint_16 green_1 = png_ptr->gamma_16_to_1[(green&0xff) >> - png_ptr->gamma_shift][green>>8]; - png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) >> - png_ptr->gamma_shift][blue>>8]; - png_uint_16 gray16 = (png_uint_16)((rc * red_1 - + gc * green_1 + bc * blue_1)>>15); - w = png_ptr->gamma_16_from_1[(gray16&0xff) >> - png_ptr->gamma_shift][gray16 >> 8]; - rgb_error |= 1; - } - - *(dp++) = (png_byte)((w>>8) & 0xff); - *(dp++) = (png_byte)(w & 0xff); - *(dp++) = *(sp++); /* alpha */ - *(dp++) = *(sp++); - } - } - else -#endif - { - png_bytep sp = row; - png_bytep dp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 red, green, blue, gray16; - red = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2; - green = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2; - blue = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2; - if(red != green || red != blue) - rgb_error |= 1; - gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15); - *(dp++) = (png_byte)((gray16>>8) & 0xff); - *(dp++) = (png_byte)(gray16 & 0xff); - *(dp++) = *(sp++); /* alpha */ - *(dp++) = *(sp++); - } - } - } - } - row_info->channels -= (png_byte)2; - row_info->color_type &= ~PNG_COLOR_MASK_COLOR; - row_info->pixel_depth = (png_byte)(row_info->channels * - row_info->bit_depth); - row_info->rowbytes = ((row_width * - row_info->pixel_depth + 7) >> 3); - } - return rgb_error; -} -#endif - -/* Build a grayscale palette. Palette is assumed to be 1 << bit_depth - * large of png_color. This lets grayscale images be treated as - * paletted. Most useful for gamma correction and simplification - * of code. - */ -void /* PRIVATE */ -png_build_grayscale_palette(int bit_depth, png_colorp palette) -{ - int num_palette; - int color_inc; - int i; - int v; - - png_debug(1, "in png_do_build_grayscale_palette\n"); - if (palette == NULL) - return; - - switch (bit_depth) - { - case 1: - num_palette = 2; - color_inc = 0xff; - break; - case 2: - num_palette = 4; - color_inc = 0x55; - break; - case 4: - num_palette = 16; - color_inc = 0x11; - break; - case 8: - num_palette = 256; - color_inc = 1; - break; - default: - num_palette = 0; - color_inc = 0; - break; - } - - for (i = 0, v = 0; i < num_palette; i++, v += color_inc) - { - palette[i].red = (png_byte)v; - palette[i].green = (png_byte)v; - palette[i].blue = (png_byte)v; - } -} - -/* This function is currently unused. Do we really need it? */ -#if defined(PNG_READ_DITHER_SUPPORTED) && defined(PNG_CORRECT_PALETTE_SUPPORTED) -void /* PRIVATE */ -png_correct_palette(png_structp png_ptr, png_colorp palette, - int num_palette) -{ - png_debug(1, "in png_correct_palette\n"); -#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \ - defined(PNG_READ_GAMMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED) - if (png_ptr->transformations & (PNG_GAMMA | PNG_BACKGROUND)) - { - png_color back, back_1; - - if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE) - { - back.red = png_ptr->gamma_table[png_ptr->background.red]; - back.green = png_ptr->gamma_table[png_ptr->background.green]; - back.blue = png_ptr->gamma_table[png_ptr->background.blue]; - - back_1.red = png_ptr->gamma_to_1[png_ptr->background.red]; - back_1.green = png_ptr->gamma_to_1[png_ptr->background.green]; - back_1.blue = png_ptr->gamma_to_1[png_ptr->background.blue]; - } - else - { - double g; - - g = 1.0 / (png_ptr->background_gamma * png_ptr->screen_gamma); - - if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_SCREEN || - fabs(g - 1.0) < PNG_GAMMA_THRESHOLD) - { - back.red = png_ptr->background.red; - back.green = png_ptr->background.green; - back.blue = png_ptr->background.blue; - } - else - { - back.red = - (png_byte)(pow((double)png_ptr->background.red/255, g) * - 255.0 + 0.5); - back.green = - (png_byte)(pow((double)png_ptr->background.green/255, g) * - 255.0 + 0.5); - back.blue = - (png_byte)(pow((double)png_ptr->background.blue/255, g) * - 255.0 + 0.5); - } - - g = 1.0 / png_ptr->background_gamma; - - back_1.red = - (png_byte)(pow((double)png_ptr->background.red/255, g) * - 255.0 + 0.5); - back_1.green = - (png_byte)(pow((double)png_ptr->background.green/255, g) * - 255.0 + 0.5); - back_1.blue = - (png_byte)(pow((double)png_ptr->background.blue/255, g) * - 255.0 + 0.5); - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_uint_32 i; - - for (i = 0; i < (png_uint_32)num_palette; i++) - { - if (i < png_ptr->num_trans && png_ptr->trans[i] == 0) - { - palette[i] = back; - } - else if (i < png_ptr->num_trans && png_ptr->trans[i] != 0xff) - { - png_byte v, w; - - v = png_ptr->gamma_to_1[png_ptr->palette[i].red]; - png_composite(w, v, png_ptr->trans[i], back_1.red); - palette[i].red = png_ptr->gamma_from_1[w]; - - v = png_ptr->gamma_to_1[png_ptr->palette[i].green]; - png_composite(w, v, png_ptr->trans[i], back_1.green); - palette[i].green = png_ptr->gamma_from_1[w]; - - v = png_ptr->gamma_to_1[png_ptr->palette[i].blue]; - png_composite(w, v, png_ptr->trans[i], back_1.blue); - palette[i].blue = png_ptr->gamma_from_1[w]; - } - else - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } - } - else - { - int i; - - for (i = 0; i < num_palette; i++) - { - if (palette[i].red == (png_byte)png_ptr->trans_values.gray) - { - palette[i] = back; - } - else - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } - } - } - else -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (png_ptr->transformations & PNG_GAMMA) - { - int i; - - for (i = 0; i < num_palette; i++) - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - else -#endif -#endif -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->transformations & PNG_BACKGROUND) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_color back; - - back.red = (png_byte)png_ptr->background.red; - back.green = (png_byte)png_ptr->background.green; - back.blue = (png_byte)png_ptr->background.blue; - - for (i = 0; i < (int)png_ptr->num_trans; i++) - { - if (png_ptr->trans[i] == 0) - { - palette[i].red = back.red; - palette[i].green = back.green; - palette[i].blue = back.blue; - } - else if (png_ptr->trans[i] != 0xff) - { - png_composite(palette[i].red, png_ptr->palette[i].red, - png_ptr->trans[i], back.red); - png_composite(palette[i].green, png_ptr->palette[i].green, - png_ptr->trans[i], back.green); - png_composite(palette[i].blue, png_ptr->palette[i].blue, - png_ptr->trans[i], back.blue); - } - } - } - else /* assume grayscale palette (what else could it be?) */ - { - int i; - - for (i = 0; i < num_palette; i++) - { - if (i == (png_byte)png_ptr->trans_values.gray) - { - palette[i].red = (png_byte)png_ptr->background.red; - palette[i].green = (png_byte)png_ptr->background.green; - palette[i].blue = (png_byte)png_ptr->background.blue; - } - } - } - } -#endif -} -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) -/* Replace any alpha or transparency with the supplied background color. - * "background" is already in the screen gamma, while "background_1" is - * at a gamma of 1.0. Paletted files have already been taken care of. - */ -void /* PRIVATE */ -png_do_background(png_row_infop row_info, png_bytep row, - png_color_16p trans_values, png_color_16p background, - png_color_16p background_1, - png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, - png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, - png_uint_16pp gamma_16_to_1, int gamma_shift) -{ - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - int shift; - - png_debug(1, "in png_do_background\n"); - if (background != NULL && -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - (!(row_info->color_type & PNG_COLOR_MASK_ALPHA) || - (row_info->color_type != PNG_COLOR_TYPE_PALETTE && trans_values))) - { - switch (row_info->color_type) - { - case PNG_COLOR_TYPE_GRAY: - { - switch (row_info->bit_depth) - { - case 1: - { - sp = row; - shift = 7; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0x01) - == trans_values->gray) - { - *sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - if (!shift) - { - shift = 7; - sp++; - } - else - shift--; - } - break; - } - case 2: - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_table != NULL) - { - sp = row; - shift = 6; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0x03) - == trans_values->gray) - { - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - else - { - png_byte p = (png_byte)((*sp >> shift) & 0x03); - png_byte g = (png_byte)((gamma_table [p | (p << 2) | - (p << 4) | (p << 6)] >> 6) & 0x03); - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(g << shift); - } - if (!shift) - { - shift = 6; - sp++; - } - else - shift -= 2; - } - } - else -#endif - { - sp = row; - shift = 6; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0x03) - == trans_values->gray) - { - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - if (!shift) - { - shift = 6; - sp++; - } - else - shift -= 2; - } - } - break; - } - case 4: - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_table != NULL) - { - sp = row; - shift = 4; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0x0f) - == trans_values->gray) - { - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - else - { - png_byte p = (png_byte)((*sp >> shift) & 0x0f); - png_byte g = (png_byte)((gamma_table[p | - (p << 4)] >> 4) & 0x0f); - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(g << shift); - } - if (!shift) - { - shift = 4; - sp++; - } - else - shift -= 4; - } - } - else -#endif - { - sp = row; - shift = 4; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0x0f) - == trans_values->gray) - { - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - if (!shift) - { - shift = 4; - sp++; - } - else - shift -= 4; - } - } - break; - } - case 8: - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_table != NULL) - { - sp = row; - for (i = 0; i < row_width; i++, sp++) - { - if (*sp == trans_values->gray) - { - *sp = (png_byte)background->gray; - } - else - { - *sp = gamma_table[*sp]; - } - } - } - else -#endif - { - sp = row; - for (i = 0; i < row_width; i++, sp++) - { - if (*sp == trans_values->gray) - { - *sp = (png_byte)background->gray; - } - } - } - break; - } - case 16: - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_16 != NULL) - { - sp = row; - for (i = 0; i < row_width; i++, sp += 2) - { - png_uint_16 v; - - v = (png_uint_16)(((*sp) << 8) + *(sp + 1)); - if (v == trans_values->gray) - { - /* background is already in screen gamma */ - *sp = (png_byte)((background->gray >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->gray & 0xff); - } - else - { - v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - } - } - } - else -#endif - { - sp = row; - for (i = 0; i < row_width; i++, sp += 2) - { - png_uint_16 v; - - v = (png_uint_16)(((*sp) << 8) + *(sp + 1)); - if (v == trans_values->gray) - { - *sp = (png_byte)((background->gray >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->gray & 0xff); - } - } - } - break; - } - } - break; - } - case PNG_COLOR_TYPE_RGB: - { - if (row_info->bit_depth == 8) - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_table != NULL) - { - sp = row; - for (i = 0; i < row_width; i++, sp += 3) - { - if (*sp == trans_values->red && - *(sp + 1) == trans_values->green && - *(sp + 2) == trans_values->blue) - { - *sp = (png_byte)background->red; - *(sp + 1) = (png_byte)background->green; - *(sp + 2) = (png_byte)background->blue; - } - else - { - *sp = gamma_table[*sp]; - *(sp + 1) = gamma_table[*(sp + 1)]; - *(sp + 2) = gamma_table[*(sp + 2)]; - } - } - } - else -#endif - { - sp = row; - for (i = 0; i < row_width; i++, sp += 3) - { - if (*sp == trans_values->red && - *(sp + 1) == trans_values->green && - *(sp + 2) == trans_values->blue) - { - *sp = (png_byte)background->red; - *(sp + 1) = (png_byte)background->green; - *(sp + 2) = (png_byte)background->blue; - } - } - } - } - else /* if (row_info->bit_depth == 16) */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_16 != NULL) - { - sp = row; - for (i = 0; i < row_width; i++, sp += 6) - { - png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1)); - png_uint_16 g = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3)); - png_uint_16 b = (png_uint_16)(((*(sp+4)) << 8) + *(sp+5)); - if (r == trans_values->red && g == trans_values->green && - b == trans_values->blue) - { - /* background is already in screen gamma */ - *sp = (png_byte)((background->red >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->red & 0xff); - *(sp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(sp + 3) = (png_byte)(background->green & 0xff); - *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(sp + 5) = (png_byte)(background->blue & 0xff); - } - else - { - png_uint_16 v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)]; - *(sp + 2) = (png_byte)((v >> 8) & 0xff); - *(sp + 3) = (png_byte)(v & 0xff); - v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)]; - *(sp + 4) = (png_byte)((v >> 8) & 0xff); - *(sp + 5) = (png_byte)(v & 0xff); - } - } - } - else -#endif - { - sp = row; - for (i = 0; i < row_width; i++, sp += 6) - { - png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp+1)); - png_uint_16 g = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3)); - png_uint_16 b = (png_uint_16)(((*(sp+4)) << 8) + *(sp+5)); - - if (r == trans_values->red && g == trans_values->green && - b == trans_values->blue) - { - *sp = (png_byte)((background->red >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->red & 0xff); - *(sp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(sp + 3) = (png_byte)(background->green & 0xff); - *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(sp + 5) = (png_byte)(background->blue & 0xff); - } - } - } - } - break; - } - case PNG_COLOR_TYPE_GRAY_ALPHA: - { - if (row_info->bit_depth == 8) - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_to_1 != NULL && gamma_from_1 != NULL && - gamma_table != NULL) - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 2, dp++) - { - png_uint_16 a = *(sp + 1); - - if (a == 0xff) - { - *dp = gamma_table[*sp]; - } - else if (a == 0) - { - /* background is already in screen gamma */ - *dp = (png_byte)background->gray; - } - else - { - png_byte v, w; - - v = gamma_to_1[*sp]; - png_composite(w, v, a, background_1->gray); - *dp = gamma_from_1[w]; - } - } - } - else -#endif - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 2, dp++) - { - png_byte a = *(sp + 1); - - if (a == 0xff) - { - *dp = *sp; - } - else if (a == 0) - { - *dp = (png_byte)background->gray; - } - else - { - png_composite(*dp, *sp, a, background_1->gray); - } - } - } - } - else /* if (png_ptr->bit_depth == 16) */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_16 != NULL && gamma_16_from_1 != NULL && - gamma_16_to_1 != NULL) - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 2) - { - png_uint_16 a = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3)); - - if (a == (png_uint_16)0xffff) - { - png_uint_16 v; - - v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); - } - else if (a == 0) - { - /* background is already in screen gamma */ - *dp = (png_byte)((background->gray >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->gray & 0xff); - } - else - { - png_uint_16 g, v, w; - - g = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; - png_composite_16(v, g, a, background_1->gray); - w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8]; - *dp = (png_byte)((w >> 8) & 0xff); - *(dp + 1) = (png_byte)(w & 0xff); - } - } - } - else -#endif - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 2) - { - png_uint_16 a = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3)); - if (a == (png_uint_16)0xffff) - { - png_memcpy(dp, sp, 2); - } - else if (a == 0) - { - *dp = (png_byte)((background->gray >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->gray & 0xff); - } - else - { - png_uint_16 g, v; - - g = (png_uint_16)(((*sp) << 8) + *(sp + 1)); - png_composite_16(v, g, a, background_1->gray); - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); - } - } - } - } - break; - } - case PNG_COLOR_TYPE_RGB_ALPHA: - { - if (row_info->bit_depth == 8) - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_to_1 != NULL && gamma_from_1 != NULL && - gamma_table != NULL) - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 3) - { - png_byte a = *(sp + 3); - - if (a == 0xff) - { - *dp = gamma_table[*sp]; - *(dp + 1) = gamma_table[*(sp + 1)]; - *(dp + 2) = gamma_table[*(sp + 2)]; - } - else if (a == 0) - { - /* background is already in screen gamma */ - *dp = (png_byte)background->red; - *(dp + 1) = (png_byte)background->green; - *(dp + 2) = (png_byte)background->blue; - } - else - { - png_byte v, w; - - v = gamma_to_1[*sp]; - png_composite(w, v, a, background_1->red); - *dp = gamma_from_1[w]; - v = gamma_to_1[*(sp + 1)]; - png_composite(w, v, a, background_1->green); - *(dp + 1) = gamma_from_1[w]; - v = gamma_to_1[*(sp + 2)]; - png_composite(w, v, a, background_1->blue); - *(dp + 2) = gamma_from_1[w]; - } - } - } - else -#endif - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 3) - { - png_byte a = *(sp + 3); - - if (a == 0xff) - { - *dp = *sp; - *(dp + 1) = *(sp + 1); - *(dp + 2) = *(sp + 2); - } - else if (a == 0) - { - *dp = (png_byte)background->red; - *(dp + 1) = (png_byte)background->green; - *(dp + 2) = (png_byte)background->blue; - } - else - { - png_composite(*dp, *sp, a, background->red); - png_composite(*(dp + 1), *(sp + 1), a, - background->green); - png_composite(*(dp + 2), *(sp + 2), a, - background->blue); - } - } - } - } - else /* if (row_info->bit_depth == 16) */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_16 != NULL && gamma_16_from_1 != NULL && - gamma_16_to_1 != NULL) - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 8, dp += 6) - { - png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6)) - << 8) + (png_uint_16)(*(sp + 7))); - if (a == (png_uint_16)0xffff) - { - png_uint_16 v; - - v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); - v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)]; - *(dp + 2) = (png_byte)((v >> 8) & 0xff); - *(dp + 3) = (png_byte)(v & 0xff); - v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)]; - *(dp + 4) = (png_byte)((v >> 8) & 0xff); - *(dp + 5) = (png_byte)(v & 0xff); - } - else if (a == 0) - { - /* background is already in screen gamma */ - *dp = (png_byte)((background->red >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->red & 0xff); - *(dp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(dp + 3) = (png_byte)(background->green & 0xff); - *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(dp + 5) = (png_byte)(background->blue & 0xff); - } - else - { - png_uint_16 v, w, x; - - v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; - png_composite_16(w, v, a, background->red); - x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; - *dp = (png_byte)((x >> 8) & 0xff); - *(dp + 1) = (png_byte)(x & 0xff); - v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)]; - png_composite_16(w, v, a, background->green); - x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; - *(dp + 2) = (png_byte)((x >> 8) & 0xff); - *(dp + 3) = (png_byte)(x & 0xff); - v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)]; - png_composite_16(w, v, a, background->blue); - x = gamma_16_from_1[(w & 0xff) >> gamma_shift][w >> 8]; - *(dp + 4) = (png_byte)((x >> 8) & 0xff); - *(dp + 5) = (png_byte)(x & 0xff); - } - } - } - else -#endif - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 8, dp += 6) - { - png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6)) - << 8) + (png_uint_16)(*(sp + 7))); - if (a == (png_uint_16)0xffff) - { - png_memcpy(dp, sp, 6); - } - else if (a == 0) - { - *dp = (png_byte)((background->red >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->red & 0xff); - *(dp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(dp + 3) = (png_byte)(background->green & 0xff); - *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(dp + 5) = (png_byte)(background->blue & 0xff); - } - else - { - png_uint_16 v; - - png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1)); - png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8) - + *(sp + 3)); - png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8) - + *(sp + 5)); - - png_composite_16(v, r, a, background->red); - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); - png_composite_16(v, g, a, background->green); - *(dp + 2) = (png_byte)((v >> 8) & 0xff); - *(dp + 3) = (png_byte)(v & 0xff); - png_composite_16(v, b, a, background->blue); - *(dp + 4) = (png_byte)((v >> 8) & 0xff); - *(dp + 5) = (png_byte)(v & 0xff); - } - } - } - } - break; - } - } - - if (row_info->color_type & PNG_COLOR_MASK_ALPHA) - { - row_info->color_type &= ~PNG_COLOR_MASK_ALPHA; - row_info->channels--; - row_info->pixel_depth = (png_byte)(row_info->channels * - row_info->bit_depth); - row_info->rowbytes = ((row_width * - row_info->pixel_depth + 7) >> 3); - } - } -} -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) -/* Gamma correct the image, avoiding the alpha channel. Make sure - * you do this after you deal with the transparency issue on grayscale - * or RGB images. If your bit depth is 8, use gamma_table, if it - * is 16, use gamma_16_table and gamma_shift. Build these with - * build_gamma_table(). - */ -void /* PRIVATE */ -png_do_gamma(png_row_infop row_info, png_bytep row, - png_bytep gamma_table, png_uint_16pp gamma_16_table, - int gamma_shift) -{ - png_bytep sp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - png_debug(1, "in png_do_gamma\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - ((row_info->bit_depth <= 8 && gamma_table != NULL) || - (row_info->bit_depth == 16 && gamma_16_table != NULL))) - { - switch (row_info->color_type) - { - case PNG_COLOR_TYPE_RGB: - { - if (row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++) - { - *sp = gamma_table[*sp]; - sp++; - *sp = gamma_table[*sp]; - sp++; - *sp = gamma_table[*sp]; - sp++; - } - } - else /* if (row_info->bit_depth == 16) */ - { - sp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 v; - - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - } - } - break; - } - case PNG_COLOR_TYPE_RGB_ALPHA: - { - if (row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++) - { - *sp = gamma_table[*sp]; - sp++; - *sp = gamma_table[*sp]; - sp++; - *sp = gamma_table[*sp]; - sp++; - sp++; - } - } - else /* if (row_info->bit_depth == 16) */ - { - sp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 4; - } - } - break; - } - case PNG_COLOR_TYPE_GRAY_ALPHA: - { - if (row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++) - { - *sp = gamma_table[*sp]; - sp += 2; - } - } - else /* if (row_info->bit_depth == 16) */ - { - sp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 4; - } - } - break; - } - case PNG_COLOR_TYPE_GRAY: - { - if (row_info->bit_depth == 2) - { - sp = row; - for (i = 0; i < row_width; i += 4) - { - int a = *sp & 0xc0; - int b = *sp & 0x30; - int c = *sp & 0x0c; - int d = *sp & 0x03; - - *sp = (png_byte)( - ((((int)gamma_table[a|(a>>2)|(a>>4)|(a>>6)]) ) & 0xc0)| - ((((int)gamma_table[(b<<2)|b|(b>>2)|(b>>4)])>>2) & 0x30)| - ((((int)gamma_table[(c<<4)|(c<<2)|c|(c>>2)])>>4) & 0x0c)| - ((((int)gamma_table[(d<<6)|(d<<4)|(d<<2)|d])>>6) )); - sp++; - } - } - if (row_info->bit_depth == 4) - { - sp = row; - for (i = 0; i < row_width; i += 2) - { - int msb = *sp & 0xf0; - int lsb = *sp & 0x0f; - - *sp = (png_byte)((((int)gamma_table[msb | (msb >> 4)]) & 0xf0) - | (((int)gamma_table[(lsb << 4) | lsb]) >> 4)); - sp++; - } - } - else if (row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++) - { - *sp = gamma_table[*sp]; - sp++; - } - } - else if (row_info->bit_depth == 16) - { - sp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - } - } - break; - } - } - } -} -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) -/* Expands a palette row to an RGB or RGBA row depending - * upon whether you supply trans and num_trans. - */ -void /* PRIVATE */ -png_do_expand_palette(png_row_infop row_info, png_bytep row, - png_colorp palette, png_bytep trans, int num_trans) -{ - int shift, value; - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - png_debug(1, "in png_do_expand_palette\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (row_info->bit_depth < 8) - { - switch (row_info->bit_depth) - { - case 1: - { - sp = row + (png_size_t)((row_width - 1) >> 3); - dp = row + (png_size_t)row_width - 1; - shift = 7 - (int)((row_width + 7) & 0x07); - for (i = 0; i < row_width; i++) - { - if ((*sp >> shift) & 0x01) - *dp = 1; - else - *dp = 0; - if (shift == 7) - { - shift = 0; - sp--; - } - else - shift++; - - dp--; - } - break; - } - case 2: - { - sp = row + (png_size_t)((row_width - 1) >> 2); - dp = row + (png_size_t)row_width - 1; - shift = (int)((3 - ((row_width + 3) & 0x03)) << 1); - for (i = 0; i < row_width; i++) - { - value = (*sp >> shift) & 0x03; - *dp = (png_byte)value; - if (shift == 6) - { - shift = 0; - sp--; - } - else - shift += 2; - - dp--; - } - break; - } - case 4: - { - sp = row + (png_size_t)((row_width - 1) >> 1); - dp = row + (png_size_t)row_width - 1; - shift = (int)((row_width & 0x01) << 2); - for (i = 0; i < row_width; i++) - { - value = (*sp >> shift) & 0x0f; - *dp = (png_byte)value; - if (shift == 4) - { - shift = 0; - sp--; - } - else - shift += 4; - - dp--; - } - break; - } - } - row_info->bit_depth = 8; - row_info->pixel_depth = 8; - row_info->rowbytes = row_width; - } - switch (row_info->bit_depth) - { - case 8: - { - if (trans != NULL) - { - sp = row + (png_size_t)row_width - 1; - dp = row + (png_size_t)(row_width << 2) - 1; - - for (i = 0; i < row_width; i++) - { - if ((int)(*sp) >= num_trans) - *dp-- = 0xff; - else - *dp-- = trans[*sp]; - *dp-- = palette[*sp].blue; - *dp-- = palette[*sp].green; - *dp-- = palette[*sp].red; - sp--; - } - row_info->bit_depth = 8; - row_info->pixel_depth = 32; - row_info->rowbytes = row_width * 4; - row_info->color_type = 6; - row_info->channels = 4; - } - else - { - sp = row + (png_size_t)row_width - 1; - dp = row + (png_size_t)(row_width * 3) - 1; - - for (i = 0; i < row_width; i++) - { - *dp-- = palette[*sp].blue; - *dp-- = palette[*sp].green; - *dp-- = palette[*sp].red; - sp--; - } - row_info->bit_depth = 8; - row_info->pixel_depth = 24; - row_info->rowbytes = row_width * 3; - row_info->color_type = 2; - row_info->channels = 3; - } - break; - } - } - } -} - -/* If the bit depth < 8, it is expanded to 8. Also, if the - * transparency value is supplied, an alpha channel is built. - */ -void /* PRIVATE */ -png_do_expand(png_row_infop row_info, png_bytep row, - png_color_16p trans_value) -{ - int shift, value; - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - png_debug(1, "in png_do_expand\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - if (row_info->color_type == PNG_COLOR_TYPE_GRAY) - { - png_uint_16 gray = (png_uint_16)(trans_value ? trans_value->gray : 0); - - if (row_info->bit_depth < 8) - { - switch (row_info->bit_depth) - { - case 1: - { - gray = (png_uint_16)(gray*0xff); - sp = row + (png_size_t)((row_width - 1) >> 3); - dp = row + (png_size_t)row_width - 1; - shift = 7 - (int)((row_width + 7) & 0x07); - for (i = 0; i < row_width; i++) - { - if ((*sp >> shift) & 0x01) - *dp = 0xff; - else - *dp = 0; - if (shift == 7) - { - shift = 0; - sp--; - } - else - shift++; - - dp--; - } - break; - } - case 2: - { - gray = (png_uint_16)(gray*0x55); - sp = row + (png_size_t)((row_width - 1) >> 2); - dp = row + (png_size_t)row_width - 1; - shift = (int)((3 - ((row_width + 3) & 0x03)) << 1); - for (i = 0; i < row_width; i++) - { - value = (*sp >> shift) & 0x03; - *dp = (png_byte)(value | (value << 2) | (value << 4) | - (value << 6)); - if (shift == 6) - { - shift = 0; - sp--; - } - else - shift += 2; - - dp--; - } - break; - } - case 4: - { - gray = (png_uint_16)(gray*0x11); - sp = row + (png_size_t)((row_width - 1) >> 1); - dp = row + (png_size_t)row_width - 1; - shift = (int)((1 - ((row_width + 1) & 0x01)) << 2); - for (i = 0; i < row_width; i++) - { - value = (*sp >> shift) & 0x0f; - *dp = (png_byte)(value | (value << 4)); - if (shift == 4) - { - shift = 0; - sp--; - } - else - shift = 4; - - dp--; - } - break; - } - } - row_info->bit_depth = 8; - row_info->pixel_depth = 8; - row_info->rowbytes = row_width; - } - - if (trans_value != NULL) - { - if (row_info->bit_depth == 8) - { - sp = row + (png_size_t)row_width - 1; - dp = row + (png_size_t)(row_width << 1) - 1; - for (i = 0; i < row_width; i++) - { - if (*sp == gray) - *dp-- = 0; - else - *dp-- = 0xff; - *dp-- = *sp--; - } - } - else if (row_info->bit_depth == 16) - { - sp = row + row_info->rowbytes - 1; - dp = row + (row_info->rowbytes << 1) - 1; - for (i = 0; i < row_width; i++) - { - if (((png_uint_16)*(sp) | - ((png_uint_16)*(sp - 1) << 8)) == gray) - { - *dp-- = 0; - *dp-- = 0; - } - else - { - *dp-- = 0xff; - *dp-- = 0xff; - } - *dp-- = *sp--; - *dp-- = *sp--; - } - } - row_info->color_type = PNG_COLOR_TYPE_GRAY_ALPHA; - row_info->channels = 2; - row_info->pixel_depth = (png_byte)(row_info->bit_depth << 1); - row_info->rowbytes = - ((row_width * row_info->pixel_depth) >> 3); - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB && trans_value) - { - if (row_info->bit_depth == 8) - { - sp = row + (png_size_t)row_info->rowbytes - 1; - dp = row + (png_size_t)(row_width << 2) - 1; - for (i = 0; i < row_width; i++) - { - if (*(sp - 2) == trans_value->red && - *(sp - 1) == trans_value->green && - *(sp - 0) == trans_value->blue) - *dp-- = 0; - else - *dp-- = 0xff; - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - } - } - else if (row_info->bit_depth == 16) - { - sp = row + row_info->rowbytes - 1; - dp = row + (png_size_t)(row_width << 3) - 1; - for (i = 0; i < row_width; i++) - { - if ((((png_uint_16)*(sp - 4) | - ((png_uint_16)*(sp - 5) << 8)) == trans_value->red) && - (((png_uint_16)*(sp - 2) | - ((png_uint_16)*(sp - 3) << 8)) == trans_value->green) && - (((png_uint_16)*(sp - 0) | - ((png_uint_16)*(sp - 1) << 8)) == trans_value->blue)) - { - *dp-- = 0; - *dp-- = 0; - } - else - { - *dp-- = 0xff; - *dp-- = 0xff; - } - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - } - } - row_info->color_type = PNG_COLOR_TYPE_RGB_ALPHA; - row_info->channels = 4; - row_info->pixel_depth = (png_byte)(row_info->bit_depth << 2); - row_info->rowbytes = - ((row_width * row_info->pixel_depth) >> 3); - } - } -} -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) -void /* PRIVATE */ -png_do_dither(png_row_infop row_info, png_bytep row, - png_bytep palette_lookup, png_bytep dither_lookup) -{ - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - png_debug(1, "in png_do_dither\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - if (row_info->color_type == PNG_COLOR_TYPE_RGB && - palette_lookup && row_info->bit_depth == 8) - { - int r, g, b, p; - sp = row; - dp = row; - for (i = 0; i < row_width; i++) - { - r = *sp++; - g = *sp++; - b = *sp++; - - /* this looks real messy, but the compiler will reduce - it down to a reasonable formula. For example, with - 5 bits per color, we get: - p = (((r >> 3) & 0x1f) << 10) | - (((g >> 3) & 0x1f) << 5) | - ((b >> 3) & 0x1f); - */ - p = (((r >> (8 - PNG_DITHER_RED_BITS)) & - ((1 << PNG_DITHER_RED_BITS) - 1)) << - (PNG_DITHER_GREEN_BITS + PNG_DITHER_BLUE_BITS)) | - (((g >> (8 - PNG_DITHER_GREEN_BITS)) & - ((1 << PNG_DITHER_GREEN_BITS) - 1)) << - (PNG_DITHER_BLUE_BITS)) | - ((b >> (8 - PNG_DITHER_BLUE_BITS)) & - ((1 << PNG_DITHER_BLUE_BITS) - 1)); - - *dp++ = palette_lookup[p]; - } - row_info->color_type = PNG_COLOR_TYPE_PALETTE; - row_info->channels = 1; - row_info->pixel_depth = row_info->bit_depth; - row_info->rowbytes = - ((row_width * row_info->pixel_depth + 7) >> 3); - } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA && - palette_lookup != NULL && row_info->bit_depth == 8) - { - int r, g, b, p; - sp = row; - dp = row; - for (i = 0; i < row_width; i++) - { - r = *sp++; - g = *sp++; - b = *sp++; - sp++; - - p = (((r >> (8 - PNG_DITHER_RED_BITS)) & - ((1 << PNG_DITHER_RED_BITS) - 1)) << - (PNG_DITHER_GREEN_BITS + PNG_DITHER_BLUE_BITS)) | - (((g >> (8 - PNG_DITHER_GREEN_BITS)) & - ((1 << PNG_DITHER_GREEN_BITS) - 1)) << - (PNG_DITHER_BLUE_BITS)) | - ((b >> (8 - PNG_DITHER_BLUE_BITS)) & - ((1 << PNG_DITHER_BLUE_BITS) - 1)); - - *dp++ = palette_lookup[p]; - } - row_info->color_type = PNG_COLOR_TYPE_PALETTE; - row_info->channels = 1; - row_info->pixel_depth = row_info->bit_depth; - row_info->rowbytes = - ((row_width * row_info->pixel_depth + 7) >> 3); - } - else if (row_info->color_type == PNG_COLOR_TYPE_PALETTE && - dither_lookup && row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++, sp++) - { - *sp = dither_lookup[*sp]; - } - } - } -} -#endif - -#ifdef PNG_FLOATING_POINT_SUPPORTED -#if defined(PNG_READ_GAMMA_SUPPORTED) -static int png_gamma_shift[] = - {0x10, 0x21, 0x42, 0x84, 0x110, 0x248, 0x550, 0xff0}; - -/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit - * tables, we don't make a full table if we are reducing to 8-bit in - * the future. Note also how the gamma_16 tables are segmented so that - * we don't need to allocate > 64K chunks for a full 16-bit table. - */ -void /* PRIVATE */ -png_build_gamma_table(png_structp png_ptr) -{ - png_debug(1, "in png_build_gamma_table\n"); - if(png_ptr->gamma != 0.0) - { - if (png_ptr->bit_depth <= 8) - { - int i; - double g; - - if (png_ptr->screen_gamma > .000001) - g = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - else - g = 1.0; - - png_ptr->gamma_table = (png_bytep)png_malloc(png_ptr, - (png_uint_32)256); - - for (i = 0; i < 256; i++) - { - png_ptr->gamma_table[i] = (png_byte)(pow((double)i / 255.0, - g) * 255.0 + .5); - } - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ - defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & ((PNG_BACKGROUND) | PNG_RGB_TO_GRAY)) - { - - g = 1.0 / (png_ptr->gamma); - - png_ptr->gamma_to_1 = (png_bytep)png_malloc(png_ptr, - (png_uint_32)256); - - for (i = 0; i < 256; i++) - { - png_ptr->gamma_to_1[i] = (png_byte)(pow((double)i / 255.0, - g) * 255.0 + .5); - } - - - png_ptr->gamma_from_1 = (png_bytep)png_malloc(png_ptr, - (png_uint_32)256); - - if(png_ptr->screen_gamma > 0.000001) - g = 1.0 / png_ptr->screen_gamma; - else - g = png_ptr->gamma; /* probably doing rgb_to_gray */ - - for (i = 0; i < 256; i++) - { - png_ptr->gamma_from_1[i] = (png_byte)(pow((double)i / 255.0, - g) * 255.0 + .5); - - } - } -#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */ - } - else - { - double g; - int i, j, shift, num; - int sig_bit; - png_uint_32 ig; - - if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - { - sig_bit = (int)png_ptr->sig_bit.red; - if ((int)png_ptr->sig_bit.green > sig_bit) - sig_bit = png_ptr->sig_bit.green; - if ((int)png_ptr->sig_bit.blue > sig_bit) - sig_bit = png_ptr->sig_bit.blue; - } - else - { - sig_bit = (int)png_ptr->sig_bit.gray; - } - - if (sig_bit > 0) - shift = 16 - sig_bit; - else - shift = 0; - - if (png_ptr->transformations & PNG_16_TO_8) - { - if (shift < (16 - PNG_MAX_GAMMA_8)) - shift = (16 - PNG_MAX_GAMMA_8); - } - - if (shift > 8) - shift = 8; - if (shift < 0) - shift = 0; - - png_ptr->gamma_shift = (png_byte)shift; - - num = (1 << (8 - shift)); - - if (png_ptr->screen_gamma > .000001) - g = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - else - g = 1.0; - - png_ptr->gamma_16_table = (png_uint_16pp)png_malloc(png_ptr, - (png_uint_32)(num * sizeof (png_uint_16p))); - - if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND)) - { - double fin, fout; - png_uint_32 last, max; - - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * sizeof (png_uint_16))); - } - - g = 1.0 / g; - last = 0; - for (i = 0; i < 256; i++) - { - fout = ((double)i + 0.5) / 256.0; - fin = pow(fout, g); - max = (png_uint_32)(fin * (double)((png_uint_32)num << 8)); - while (last <= max) - { - png_ptr->gamma_16_table[(int)(last & (0xff >> shift))] - [(int)(last >> (8 - shift))] = (png_uint_16)( - (png_uint_16)i | ((png_uint_16)i << 8)); - last++; - } - } - while (last < ((png_uint_32)num << 8)) - { - png_ptr->gamma_16_table[(int)(last & (0xff >> shift))] - [(int)(last >> (8 - shift))] = (png_uint_16)65535L; - last++; - } - } - else - { - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * sizeof (png_uint_16))); - - ig = (((png_uint_32)i * (png_uint_32)png_gamma_shift[shift]) >> 4); - for (j = 0; j < 256; j++) - { - png_ptr->gamma_16_table[i][j] = - (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) / - 65535.0, g) * 65535.0 + .5); - } - } - } - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ - defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & (PNG_BACKGROUND | PNG_RGB_TO_GRAY)) - { - - g = 1.0 / (png_ptr->gamma); - - png_ptr->gamma_16_to_1 = (png_uint_16pp)png_malloc(png_ptr, - (png_uint_32)(num * sizeof (png_uint_16p ))); - - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_to_1[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * sizeof (png_uint_16))); - - ig = (((png_uint_32)i * - (png_uint_32)png_gamma_shift[shift]) >> 4); - for (j = 0; j < 256; j++) - { - png_ptr->gamma_16_to_1[i][j] = - (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) / - 65535.0, g) * 65535.0 + .5); - } - } - - if(png_ptr->screen_gamma > 0.000001) - g = 1.0 / png_ptr->screen_gamma; - else - g = png_ptr->gamma; /* probably doing rgb_to_gray */ - - png_ptr->gamma_16_from_1 = (png_uint_16pp)png_malloc(png_ptr, - (png_uint_32)(num * sizeof (png_uint_16p))); - - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_from_1[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * sizeof (png_uint_16))); - - ig = (((png_uint_32)i * - (png_uint_32)png_gamma_shift[shift]) >> 4); - for (j = 0; j < 256; j++) - { - png_ptr->gamma_16_from_1[i][j] = - (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) / - 65535.0, g) * 65535.0 + .5); - } - } - } -#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */ - } - } -} -#endif -/* To do: install integer version of png_build_gamma_table here */ -#endif - -#if defined(PNG_MNG_FEATURES_SUPPORTED) -/* undoes intrapixel differencing */ -void /* PRIVATE */ -png_do_read_intrapixel(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_read_intrapixel\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - (row_info->color_type & PNG_COLOR_MASK_COLOR)) - { - int bytes_per_pixel; - png_uint_32 row_width = row_info->width; - if (row_info->bit_depth == 8) - { - png_bytep rp; - png_uint_32 i; - - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 3; - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 4; - else - return; - - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - *(rp) = (png_byte)((256 + *rp + *(rp+1))&0xff); - *(rp+2) = (png_byte)((256 + *(rp+2) + *(rp+1))&0xff); - } - } - else if (row_info->bit_depth == 16) - { - png_bytep rp; - png_uint_32 i; - - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 6; - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 8; - else - return; - - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - png_uint_32 s0=*(rp )<<8 | *(rp+1); - png_uint_32 s1=*(rp+2)<<8 | *(rp+3); - png_uint_32 s2=*(rp+4)<<8 | *(rp+5); - png_uint_32 red=(65536+s0+s1)&0xffff; - png_uint_32 blue=(65536+s2+s1)&0xffff; - *(rp ) = (png_byte)((red>>8)&0xff); - *(rp+1) = (png_byte)(red&0xff); - *(rp+4) = (png_byte)((blue>>8)&0xff); - *(rp+5) = (png_byte)(blue&0xff); - } - } - } -} -#endif /* PNG_MNG_FEATURES_SUPPORTED */ diff --git a/libraries/libpng-1.0.9/pngrutil.c b/libraries/libpng-1.0.9/pngrutil.c deleted file mode 100644 index c2f556b..0000000 --- a/libraries/libpng-1.0.9/pngrutil.c +++ /dev/null @@ -1,3029 +0,0 @@ - -/* pngrutil.c - utilities to read a PNG file - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This file contains routines that are only called from within - * libpng itself during the course of reading an image. - */ - -#define PNG_INTERNAL -#include "png.h" - -#if defined(_WIN32_WCE) -/* strtod() function is not supported on WindowsCE */ -# ifdef PNG_FLOATING_POINT_SUPPORTED -__inline double strtod(const char *nptr, char **endptr) -{ - double result = 0; - int len; - wchar_t *str, *end; - - len = MultiByteToWideChar(CP_ACP, 0, nptr, -1, NULL, 0); - str = (wchar_t *)malloc(len * sizeof(wchar_t)); - if ( NULL != str ) - { - MultiByteToWideChar(CP_ACP, 0, nptr, -1, str, len); - result = wcstod(str, &end); - len = WideCharToMultiByte(CP_ACP, 0, end, -1, NULL, 0, NULL, NULL); - *endptr = (char *)nptr + (strlen(nptr) - len + 1); - free(str); - } - return result; -} -# endif -#endif - -#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED -/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */ -png_uint_32 /* PRIVATE */ -png_get_uint_32(png_bytep buf) -{ - png_uint_32 i = ((png_uint_32)(*buf) << 24) + - ((png_uint_32)(*(buf + 1)) << 16) + - ((png_uint_32)(*(buf + 2)) << 8) + - (png_uint_32)(*(buf + 3)); - - return (i); -} - -#if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_READ_oFFs_SUPPORTED) -/* Grab a signed 32-bit integer from a buffer in big-endian format. The - * data is stored in the PNG file in two's complement format, and it is - * assumed that the machine format for signed integers is the same. */ -png_int_32 /* PRIVATE */ -png_get_int_32(png_bytep buf) -{ - png_int_32 i = ((png_int_32)(*buf) << 24) + - ((png_int_32)(*(buf + 1)) << 16) + - ((png_int_32)(*(buf + 2)) << 8) + - (png_int_32)(*(buf + 3)); - - return (i); -} -#endif /* PNG_READ_pCAL_SUPPORTED */ - -/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */ -png_uint_16 /* PRIVATE */ -png_get_uint_16(png_bytep buf) -{ - png_uint_16 i = (png_uint_16)(((png_uint_16)(*buf) << 8) + - (png_uint_16)(*(buf + 1))); - - return (i); -} -#endif /* PNG_READ_BIG_ENDIAN_SUPPORTED */ - -/* Read data, and (optionally) run it through the CRC. */ -void /* PRIVATE */ -png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length) -{ - png_read_data(png_ptr, buf, length); - png_calculate_crc(png_ptr, buf, length); -} - -/* Optionally skip data and then check the CRC. Depending on whether we - are reading a ancillary or critical chunk, and how the program has set - things up, we may calculate the CRC on the data and print a message. - Returns '1' if there was a CRC error, '0' otherwise. */ -int /* PRIVATE */ -png_crc_finish(png_structp png_ptr, png_uint_32 skip) -{ - png_size_t i; - png_size_t istop = png_ptr->zbuf_size; - - for (i = (png_size_t)skip; i > istop; i -= istop) - { - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - } - if (i) - { - png_crc_read(png_ptr, png_ptr->zbuf, i); - } - - if (png_crc_error(png_ptr)) - { - if (((png_ptr->chunk_name[0] & 0x20) && /* Ancillary */ - !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) || - (!(png_ptr->chunk_name[0] & 0x20) && /* Critical */ - (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE))) - { - png_chunk_warning(png_ptr, "CRC error"); - } - else - { - png_chunk_error(png_ptr, "CRC error"); - } - return (1); - } - - return (0); -} - -/* Compare the CRC stored in the PNG file with that calculated by libpng from - the data it has read thus far. */ -int /* PRIVATE */ -png_crc_error(png_structp png_ptr) -{ - png_byte crc_bytes[4]; - png_uint_32 crc; - int need_crc = 1; - - if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ - { - if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == - (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) - need_crc = 0; - } - else /* critical */ - { - if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) - need_crc = 0; - } - - png_read_data(png_ptr, crc_bytes, 4); - - if (need_crc) - { - crc = png_get_uint_32(crc_bytes); - return ((int)(crc != png_ptr->crc)); - } - else - return (0); -} - -#if defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) || \ - defined(PNG_READ_iCCP_SUPPORTED) -/* - * Decompress trailing data in a chunk. The assumption is that chunkdata - * points at an allocated area holding the contents of a chunk with a - * trailing compressed part. What we get back is an allocated area - * holding the original prefix part and an uncompressed version of the - * trailing part (the malloc area passed in is freed). - */ -png_charp /* PRIVATE */ -png_decompress_chunk(png_structp png_ptr, int comp_type, - png_charp chunkdata, png_size_t chunklength, - png_size_t prefix_size, png_size_t *newlength) -{ - static char msg[] = "Error decoding compressed text"; - png_charp text = NULL; - png_size_t text_size; - - if (comp_type == PNG_COMPRESSION_TYPE_BASE) - { - int ret = Z_OK; - png_ptr->zstream.next_in = (png_bytep)(chunkdata + prefix_size); - png_ptr->zstream.avail_in = (uInt)(chunklength - prefix_size); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - text_size = 0; - text = NULL; - - while (png_ptr->zstream.avail_in) - { - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret != Z_OK && ret != Z_STREAM_END) - { - if (png_ptr->zstream.msg != NULL) - png_warning(png_ptr, png_ptr->zstream.msg); - else - png_warning(png_ptr, msg); - inflateReset(&png_ptr->zstream); - png_ptr->zstream.avail_in = 0; - - if (text == NULL) - { - text_size = prefix_size + sizeof(msg) + 1; - text = (png_charp)png_malloc(png_ptr, text_size); - png_memcpy(text, chunkdata, prefix_size); - } - - text[text_size - 1] = 0x00; - - /* Copy what we can of the error message into the text chunk */ - text_size = (png_size_t)(chunklength - (text - chunkdata) - 1); - text_size = sizeof(msg) > text_size ? text_size : sizeof(msg); - png_memcpy(text + prefix_size, msg, text_size + 1); - break; - } - if (!png_ptr->zstream.avail_out || ret == Z_STREAM_END) - { - if (text == NULL) - { - text_size = prefix_size + - png_ptr->zbuf_size - png_ptr->zstream.avail_out; - text = (png_charp)png_malloc(png_ptr, text_size + 1); - png_memcpy(text + prefix_size, png_ptr->zbuf, - text_size - prefix_size); - png_memcpy(text, chunkdata, prefix_size); - *(text + text_size) = 0x00; - } - else - { - png_charp tmp; - - tmp = text; - text = (png_charp)png_malloc(png_ptr, (png_uint_32)(text_size + - png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1)); - png_memcpy(text, tmp, text_size); - png_free(png_ptr, tmp); - png_memcpy(text + text_size, png_ptr->zbuf, - (png_ptr->zbuf_size - png_ptr->zstream.avail_out)); - text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out; - *(text + text_size) = 0x00; - } - if (ret == Z_STREAM_END) - break; - else - { - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - } - } - if (ret != Z_STREAM_END) - { -#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) - char umsg[50]; - - if (ret == Z_BUF_ERROR) - sprintf(umsg,"Buffer error in compressed datastream in %s chunk", - png_ptr->chunk_name); - else if (ret == Z_DATA_ERROR) - sprintf(umsg,"Data error in compressed datastream in %s chunk", - png_ptr->chunk_name); - else - sprintf(umsg,"Incomplete compressed datastream in %s chunk", - png_ptr->chunk_name); - png_warning(png_ptr, umsg); -#else - png_warning(png_ptr, - "Incomplete compressed datastream in chunk other than IDAT"); -#endif - text_size=prefix_size; - if (text == NULL) - { - text = (png_charp)png_malloc(png_ptr, text_size+1); - png_memcpy(text, chunkdata, prefix_size); - } - *(text + text_size) = 0x00; - } - - inflateReset(&png_ptr->zstream); - png_ptr->zstream.avail_in = 0; - - png_free(png_ptr, chunkdata); - chunkdata = text; - *newlength=text_size; - } - else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */ - { -#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) - char umsg[50]; - - sprintf(umsg, "Unknown zTXt compression type %d", comp_type); - png_warning(png_ptr, umsg); -#else - png_warning(png_ptr, "Unknown zTXt compression type"); -#endif - - *(chunkdata + prefix_size) = 0x00; - *newlength=prefix_size; - } - - return chunkdata; -} -#endif - -/* read and check the IDHR chunk */ -void /* PRIVATE */ -png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[13]; - png_uint_32 width, height; - int bit_depth, color_type, compression_type, filter_type; - int interlace_type; - - png_debug(1, "in png_handle_IHDR\n"); - - if (png_ptr->mode & PNG_HAVE_IHDR) - png_error(png_ptr, "Out of place IHDR"); - - /* check the length */ - if (length != 13) - png_error(png_ptr, "Invalid IHDR chunk"); - - png_ptr->mode |= PNG_HAVE_IHDR; - - png_crc_read(png_ptr, buf, 13); - png_crc_finish(png_ptr, 0); - - width = png_get_uint_32(buf); - height = png_get_uint_32(buf + 4); - bit_depth = buf[8]; - color_type = buf[9]; - compression_type = buf[10]; - filter_type = buf[11]; - interlace_type = buf[12]; - - /* check for width and height valid values */ - if (width == 0 || width > PNG_MAX_UINT || height == 0 || - height > PNG_MAX_UINT) - png_error(png_ptr, "Invalid image size in IHDR"); - - /* check other values */ - if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && - bit_depth != 8 && bit_depth != 16) - png_error(png_ptr, "Invalid bit depth in IHDR"); - - if (color_type < 0 || color_type == 1 || - color_type == 5 || color_type > 6) - png_error(png_ptr, "Invalid color type in IHDR"); - - if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) || - ((color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) - png_error(png_ptr, "Invalid color type/bit depth combination in IHDR"); - - if (interlace_type >= PNG_INTERLACE_LAST) - png_error(png_ptr, "Unknown interlace method in IHDR"); - - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - png_error(png_ptr, "Unknown compression method in IHDR"); - -#if defined(PNG_MNG_FEATURES_SUPPORTED) - /* Accept filter_method 64 (intrapixel differencing) only if - * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and - * 2. Libpng did not read a PNG signature (this filter_method is only - * used in PNG datastreams that are embedded in MNG datastreams) and - * 3. The application called png_permit_mng_features with a mask that - * included PNG_FLAG_MNG_FILTER_64 and - * 4. The filter_method is 64 and - * 5. The color_type is RGB or RGBA - */ - if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted) - png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n"); - if(filter_type != PNG_FILTER_TYPE_BASE) - { - if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && - ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && - (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA))) - png_error(png_ptr, "Unknown filter method in IHDR"); - if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) - png_warning(png_ptr, "Invalid filter method in IHDR"); - } -#else - if(filter_type != PNG_FILTER_TYPE_BASE) - png_error(png_ptr, "Unknown filter method in IHDR"); -#endif - - /* set internal variables */ - png_ptr->width = width; - png_ptr->height = height; - png_ptr->bit_depth = (png_byte)bit_depth; - png_ptr->interlaced = (png_byte)interlace_type; - png_ptr->color_type = (png_byte)color_type; - png_ptr->filter_type = (png_byte)filter_type; - - /* find number of channels */ - switch (png_ptr->color_type) - { - case PNG_COLOR_TYPE_GRAY: - case PNG_COLOR_TYPE_PALETTE: - png_ptr->channels = 1; - break; - case PNG_COLOR_TYPE_RGB: - png_ptr->channels = 3; - break; - case PNG_COLOR_TYPE_GRAY_ALPHA: - png_ptr->channels = 2; - break; - case PNG_COLOR_TYPE_RGB_ALPHA: - png_ptr->channels = 4; - break; - } - - /* set up other useful info */ - png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth * - png_ptr->channels); - png_ptr->rowbytes = ((png_ptr->width * - (png_uint_32)png_ptr->pixel_depth + 7) >> 3); - png_debug1(3,"bit_depth = %d\n", png_ptr->bit_depth); - png_debug1(3,"channels = %d\n", png_ptr->channels); - png_debug1(3,"rowbytes = %lu\n", png_ptr->rowbytes); - png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, - color_type, interlace_type, compression_type, filter_type); -} - -/* read and check the palette */ -void /* PRIVATE */ -png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_color palette[PNG_MAX_PALETTE_LENGTH]; - int num, i; -#ifndef PNG_NO_POINTER_INDEXING - png_colorp pal_ptr; -#endif - - png_debug(1, "in png_handle_PLTE\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before PLTE"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid PLTE after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - png_error(png_ptr, "Duplicate PLTE chunk"); - - png_ptr->mode |= PNG_HAVE_PLTE; - -#if !defined(PNG_READ_OPT_PLTE_SUPPORTED) - if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) - { - png_crc_finish(png_ptr, length); - return; - } -#endif - - if (length > 3*PNG_MAX_PALETTE_LENGTH || length % 3) - { - if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) - { - png_warning(png_ptr, "Invalid palette chunk"); - png_crc_finish(png_ptr, length); - return; - } - else - { - png_error(png_ptr, "Invalid palette chunk"); - } - } - - num = (int)length / 3; - -#ifndef PNG_NO_POINTER_INDEXING - for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++) - { - png_byte buf[3]; - - png_crc_read(png_ptr, buf, 3); - pal_ptr->red = buf[0]; - pal_ptr->green = buf[1]; - pal_ptr->blue = buf[2]; - } -#else - for (i = 0; i < num; i++) - { - png_byte buf[3]; - - png_crc_read(png_ptr, buf, 3); - /* don't depend upon png_color being any order */ - palette[i].red = buf[0]; - palette[i].green = buf[1]; - palette[i].blue = buf[2]; - } -#endif - - /* If we actually NEED the PLTE chunk (ie for a paletted image), we do - whatever the normal CRC configuration tells us. However, if we - have an RGB image, the PLTE can be considered ancillary, so - we will act as though it is. */ -#if !defined(PNG_READ_OPT_PLTE_SUPPORTED) - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) -#endif - { - png_crc_finish(png_ptr, 0); - } -#if !defined(PNG_READ_OPT_PLTE_SUPPORTED) - else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */ - { - /* If we don't want to use the data from an ancillary chunk, - we have two options: an error abort, or a warning and we - ignore the data in this chunk (which should be OK, since - it's considered ancillary for a RGB or RGBA image). */ - if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE)) - { - if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) - { - png_chunk_error(png_ptr, "CRC error"); - } - else - { - png_chunk_warning(png_ptr, "CRC error"); - return; - } - } - /* Otherwise, we (optionally) emit a warning and use the chunk. */ - else if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) - { - png_chunk_warning(png_ptr, "CRC error"); - } - } -#endif - - png_set_PLTE(png_ptr, info_ptr, palette, num); - -#if defined(PNG_READ_tRNS_SUPPORTED) - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) - { - if (png_ptr->num_trans > (png_uint_16)num) - { - png_warning(png_ptr, "Truncating incorrect tRNS chunk length"); - png_ptr->num_trans = (png_uint_16)num; - } - if (info_ptr->num_trans > (png_uint_16)num) - { - png_warning(png_ptr, "Truncating incorrect info tRNS chunk length"); - info_ptr->num_trans = (png_uint_16)num; - } - } - } -#endif - -} - -void /* PRIVATE */ -png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_debug(1, "in png_handle_IEND\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR) || !(png_ptr->mode & PNG_HAVE_IDAT)) - { - png_error(png_ptr, "No image in file"); - - /* to quiet compiler warnings about unused info_ptr */ - if (info_ptr == NULL) - return; - } - - png_ptr->mode |= (PNG_AFTER_IDAT | PNG_HAVE_IEND); - - if (length != 0) - { - png_warning(png_ptr, "Incorrect IEND chunk length"); - } - png_crc_finish(png_ptr, length); -} - -#if defined(PNG_READ_gAMA_SUPPORTED) -void /* PRIVATE */ -png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_fixed_point igamma; -#ifdef PNG_FLOATING_POINT_SUPPORTED - float file_gamma; -#endif - png_byte buf[4]; - - png_debug(1, "in png_handle_gAMA\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before gAMA"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid gAMA after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place gAMA chunk"); - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) -#if defined(PNG_READ_sRGB_SUPPORTED) - && !(info_ptr->valid & PNG_INFO_sRGB) -#endif - ) - { - png_warning(png_ptr, "Duplicate gAMA chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 4) - { - png_warning(png_ptr, "Incorrect gAMA chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 4); - if (png_crc_finish(png_ptr, 0)) - return; - - igamma = (png_fixed_point)png_get_uint_32(buf); - /* check for zero gamma */ - if (igamma == 0) - return; - -#if defined(PNG_READ_sRGB_SUPPORTED) - if (info_ptr->valid & PNG_INFO_sRGB) - if(igamma < 45000L || igamma > 46000L) - { - png_warning(png_ptr, - "Ignoring incorrect gAMA value when sRGB is also present"); -#ifndef PNG_NO_CONSOLE_IO - fprintf(stderr, "gamma = (%d/100000)\n", (int)igamma); -#endif - return; - } -#endif /* PNG_READ_sRGB_SUPPORTED */ - -#ifdef PNG_FLOATING_POINT_SUPPORTED - file_gamma = (float)igamma / (float)100000.0; -# ifdef PNG_READ_GAMMA_SUPPORTED - png_ptr->gamma = file_gamma; -# endif - png_set_gAMA(png_ptr, info_ptr, file_gamma); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_set_gAMA_fixed(png_ptr, info_ptr, igamma); -#endif -} -#endif - -#if defined(PNG_READ_sBIT_SUPPORTED) -void /* PRIVATE */ -png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_size_t truelen; - png_byte buf[4]; - - png_debug(1, "in png_handle_sBIT\n"); - - buf[0] = buf[1] = buf[2] = buf[3] = 0; - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sBIT"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sBIT after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - { - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sBIT chunk"); - } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)) - { - png_warning(png_ptr, "Duplicate sBIT chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - truelen = 3; - else - truelen = (png_size_t)png_ptr->channels; - - if (length != truelen) - { - png_warning(png_ptr, "Incorrect sBIT chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, truelen); - if (png_crc_finish(png_ptr, 0)) - return; - - if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - { - png_ptr->sig_bit.red = buf[0]; - png_ptr->sig_bit.green = buf[1]; - png_ptr->sig_bit.blue = buf[2]; - png_ptr->sig_bit.alpha = buf[3]; - } - else - { - png_ptr->sig_bit.gray = buf[0]; - png_ptr->sig_bit.red = buf[0]; - png_ptr->sig_bit.green = buf[0]; - png_ptr->sig_bit.blue = buf[0]; - png_ptr->sig_bit.alpha = buf[1]; - } - png_set_sBIT(png_ptr, info_ptr, &(png_ptr->sig_bit)); -} -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) -void /* PRIVATE */ -png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[4]; -#ifdef PNG_FLOATING_POINT_SUPPORTED - float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; -#endif - png_fixed_point int_x_white, int_y_white, int_x_red, int_y_red, int_x_green, - int_y_green, int_x_blue, int_y_blue; - - png_debug(1, "in png_handle_cHRM\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before cHRM"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid cHRM after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Missing PLTE before cHRM"); - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM) -#if defined(PNG_READ_sRGB_SUPPORTED) - && !(info_ptr->valid & PNG_INFO_sRGB) -#endif - ) - { - png_warning(png_ptr, "Duplicate cHRM chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 32) - { - png_warning(png_ptr, "Incorrect cHRM chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 4); - int_x_white = (png_fixed_point)png_get_uint_32(buf); - - png_crc_read(png_ptr, buf, 4); - int_y_white = (png_fixed_point)png_get_uint_32(buf); - - if (int_x_white > 80000L || int_y_white > 80000L || - int_x_white + int_y_white > 100000L) - { - png_warning(png_ptr, "Invalid cHRM white point"); - png_crc_finish(png_ptr, 24); - return; - } - - png_crc_read(png_ptr, buf, 4); - int_x_red = (png_fixed_point)png_get_uint_32(buf); - - png_crc_read(png_ptr, buf, 4); - int_y_red = (png_fixed_point)png_get_uint_32(buf); - - if (int_x_red > 80000L || int_y_red > 80000L || - int_x_red + int_y_red > 100000L) - { - png_warning(png_ptr, "Invalid cHRM red point"); - png_crc_finish(png_ptr, 16); - return; - } - - png_crc_read(png_ptr, buf, 4); - int_x_green = (png_fixed_point)png_get_uint_32(buf); - - png_crc_read(png_ptr, buf, 4); - int_y_green = (png_fixed_point)png_get_uint_32(buf); - - if (int_x_green > 80000L || int_y_green > 80000L || - int_x_green + int_y_green > 100000L) - { - png_warning(png_ptr, "Invalid cHRM green point"); - png_crc_finish(png_ptr, 8); - return; - } - - png_crc_read(png_ptr, buf, 4); - int_x_blue = (png_fixed_point)png_get_uint_32(buf); - - png_crc_read(png_ptr, buf, 4); - int_y_blue = (png_fixed_point)png_get_uint_32(buf); - - if (int_x_blue > 80000L || int_y_blue > 80000L || - int_x_blue + int_y_blue > 100000L) - { - png_warning(png_ptr, "Invalid cHRM blue point"); - png_crc_finish(png_ptr, 0); - return; - } -#ifdef PNG_FLOATING_POINT_SUPPORTED - white_x = (float)int_x_white / (float)100000.0; - white_y = (float)int_y_white / (float)100000.0; - red_x = (float)int_x_red / (float)100000.0; - red_y = (float)int_y_red / (float)100000.0; - green_x = (float)int_x_green / (float)100000.0; - green_y = (float)int_y_green / (float)100000.0; - blue_x = (float)int_x_blue / (float)100000.0; - blue_y = (float)int_y_blue / (float)100000.0; -#endif - -#if defined(PNG_READ_sRGB_SUPPORTED) - if (info_ptr->valid & PNG_INFO_sRGB) - { - if (abs(int_x_white - 31270L) > 1000 || - abs(int_y_white - 32900L) > 1000 || - abs( int_x_red - 64000L) > 1000 || - abs( int_y_red - 33000L) > 1000 || - abs(int_x_green - 30000L) > 1000 || - abs(int_y_green - 60000L) > 1000 || - abs( int_x_blue - 15000L) > 1000 || - abs( int_y_blue - 6000L) > 1000) - { - - png_warning(png_ptr, - "Ignoring incorrect cHRM value when sRGB is also present"); -#ifndef PNG_NO_CONSOLE_IO -#ifdef PNG_FLOATING_POINT_SUPPORTED - fprintf(stderr,"wx=%f, wy=%f, rx=%f, ry=%f\n", - white_x, white_y, red_x, red_y); - fprintf(stderr,"gx=%f, gy=%f, bx=%f, by=%f\n", - green_x, green_y, blue_x, blue_y); -#else - fprintf(stderr,"wx=%ld, wy=%ld, rx=%ld, ry=%ld\n", - int_x_white, int_y_white, int_x_red, int_y_red); - fprintf(stderr,"gx=%ld, gy=%ld, bx=%ld, by=%ld\n", - int_x_green, int_y_green, int_x_blue, int_y_blue); -#endif -#endif /* PNG_NO_CONSOLE_IO */ - } - png_crc_finish(png_ptr, 0); - return; - } -#endif /* PNG_READ_sRGB_SUPPORTED */ - -#ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_cHRM(png_ptr, info_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_set_cHRM_fixed(png_ptr, info_ptr, - int_x_white, int_y_white, int_x_red, int_y_red, int_x_green, - int_y_green, int_x_blue, int_y_blue); -#endif - if (png_crc_finish(png_ptr, 0)) - return; -} -#endif - -#if defined(PNG_READ_sRGB_SUPPORTED) -void /* PRIVATE */ -png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - int intent; - png_byte buf[1]; - - png_debug(1, "in png_handle_sRGB\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sRGB"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sRGB after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sRGB chunk"); - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) - { - png_warning(png_ptr, "Duplicate sRGB chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 1) - { - png_warning(png_ptr, "Incorrect sRGB chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 1); - if (png_crc_finish(png_ptr, 0)) - return; - - intent = buf[0]; - /* check for bad intent */ - if (intent >= PNG_sRGB_INTENT_LAST) - { - png_warning(png_ptr, "Unknown sRGB intent"); - return; - } - -#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED) - if ((info_ptr->valid & PNG_INFO_gAMA)) - { - int igamma; -#ifdef PNG_FIXED_POINT_SUPPORTED - igamma=(int)info_ptr->int_gamma; -#else -# ifdef PNG_FLOATING_POINT_SUPPORTED - igamma=(int)(info_ptr->gamma * 100000.); -# endif -#endif -#if 0 && defined(PNG_cHRM_SUPPORTED) && !defined(PNG_FIXED_POINT_SUPPORTED) -/* We need to define these here because they aren't in png.h */ - png_fixed_point int_x_white; - png_fixed_point int_y_white; - png_fixed_point int_x_red; - png_fixed_point int_y_red; - png_fixed_point int_x_green; - png_fixed_point int_y_green; - png_fixed_point int_x_blue; - png_fixed_point int_y_blue; -#endif - if(igamma < 45000L || igamma > 46000L) - { - png_warning(png_ptr, - "Ignoring incorrect gAMA value when sRGB is also present"); -#ifndef PNG_NO_CONSOLE_IO -# ifdef PNG_FIXED_POINT_SUPPORTED - fprintf(stderr,"incorrect gamma=(%d/100000)\n",(int)png_ptr->int_gamma); -# else -# ifdef PNG_FLOATING_POINT_SUPPORTED - fprintf(stderr,"incorrect gamma=%f\n",png_ptr->gamma); -# endif -# endif -#endif - } - } -#endif /* PNG_READ_gAMA_SUPPORTED */ - -#ifdef PNG_READ_cHRM_SUPPORTED -#ifdef PNG_FIXED_POINT_SUPPORTED - if (info_ptr->valid & PNG_INFO_cHRM) - if (abs(info_ptr->int_x_white - 31270L) > 1000 || - abs(info_ptr->int_y_white - 32900L) > 1000 || - abs( info_ptr->int_x_red - 64000L) > 1000 || - abs( info_ptr->int_y_red - 33000L) > 1000 || - abs(info_ptr->int_x_green - 30000L) > 1000 || - abs(info_ptr->int_y_green - 60000L) > 1000 || - abs( info_ptr->int_x_blue - 15000L) > 1000 || - abs( info_ptr->int_y_blue - 6000L) > 1000) - { - png_warning(png_ptr, - "Ignoring incorrect cHRM value when sRGB is also present"); - } -#endif /* PNG_FIXED_POINT_SUPPORTED */ -#endif /* PNG_READ_cHRM_SUPPORTED */ - - png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent); -} -#endif /* PNG_READ_sRGB_SUPPORTED */ - -#if defined(PNG_READ_iCCP_SUPPORTED) -void /* PRIVATE */ -png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -/* Note: this does not properly handle chunks that are > 64K under DOS */ -{ - png_charp chunkdata; - png_byte compression_type; - png_charp profile; - png_uint_32 skip = 0; - png_uint_32 profile_size = 0; - png_uint_32 profile_length = 0; - png_size_t slength, prefix_length, data_length; - - png_debug(1, "in png_handle_iCCP\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before iCCP"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid iCCP after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place iCCP chunk"); - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)) - { - png_warning(png_ptr, "Duplicate iCCP chunk"); - png_crc_finish(png_ptr, length); - return; - } - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "iCCP chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - chunkdata = (png_charp)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)chunkdata, slength); - - if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, chunkdata); - return; - } - - chunkdata[slength] = 0x00; - - for (profile = chunkdata; *profile; profile++) - /* empty loop to find end of name */ ; - - ++profile; - - /* there should be at least one zero (the compression type byte) - following the separator, and we should be on it */ - if ( profile >= chunkdata + slength) - { - png_free(png_ptr, chunkdata); - png_warning(png_ptr, "Malformed iCCP chunk"); - return; - } - - /* compression_type should always be zero */ - compression_type = *profile++; - if (compression_type) - { - png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk"); - compression_type=0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8 - wrote nonzero) */ - } - - prefix_length = profile - chunkdata; - chunkdata = png_decompress_chunk(png_ptr, compression_type, chunkdata, - slength, prefix_length, &data_length); - - profile_length = data_length - prefix_length; - - /* Check the profile_size recorded in the first 32 bits of the ICC profile */ - profile_size = ((*(chunkdata+prefix_length))<<24) | - ((*(chunkdata+prefix_length+1))<<16) | - ((*(chunkdata+prefix_length+2))<< 8) | - ((*(chunkdata+prefix_length+3)) ); - - if(profile_size < profile_length) - profile_length = profile_size; - - if(profile_size > profile_length) - { - png_warning(png_ptr, "Ignoring truncated iCCP profile.\n"); - return; - } - - png_set_iCCP(png_ptr, info_ptr, chunkdata, compression_type, - chunkdata + prefix_length, profile_length); - png_free(png_ptr, chunkdata); -} -#endif /* PNG_READ_iCCP_SUPPORTED */ - -#if defined(PNG_READ_sPLT_SUPPORTED) -void /* PRIVATE */ -png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -/* Note: this does not properly handle chunks that are > 64K under DOS */ -{ - png_bytep chunkdata; - png_bytep entry_start; - png_sPLT_t new_palette; -#ifdef PNG_NO_POINTER_INDEXING - png_sPLT_entryp pp; -#endif - int data_length, entry_size, i; - png_uint_32 skip = 0; - png_size_t slength; - - png_debug(1, "in png_handle_sPLT\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sPLT"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sPLT after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "sPLT chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - chunkdata = (png_bytep)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, chunkdata, slength); - - if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, chunkdata); - return; - } - - chunkdata[slength] = 0x00; - - for (entry_start = chunkdata; *entry_start; entry_start++) - /* empty loop to find end of name */ ; - ++entry_start; - - /* a sample depth should follow the separator, and we should be on it */ - if (entry_start > chunkdata + slength) - { - png_free(png_ptr, chunkdata); - png_warning(png_ptr, "malformed sPLT chunk"); - return; - } - - new_palette.depth = *entry_start++; - entry_size = (new_palette.depth == 8 ? 6 : 10); - data_length = (slength - (entry_start - chunkdata)); - - /* integrity-check the data length */ - if (data_length % entry_size) - { - png_free(png_ptr, chunkdata); - png_error(png_ptr, "sPLT chunk has bad length"); - } - - new_palette.nentries = data_length / entry_size; - new_palette.entries = (png_sPLT_entryp)png_malloc( - png_ptr, new_palette.nentries * sizeof(png_sPLT_entry)); - -#ifndef PNG_NO_POINTER_INDEXING - for (i = 0; i < new_palette.nentries; i++) - { - png_sPLT_entryp pp = new_palette.entries + i; - - if (new_palette.depth == 8) - { - pp->red = *entry_start++; - pp->green = *entry_start++; - pp->blue = *entry_start++; - pp->alpha = *entry_start++; - } - else - { - pp->red = png_get_uint_16(entry_start); entry_start += 2; - pp->green = png_get_uint_16(entry_start); entry_start += 2; - pp->blue = png_get_uint_16(entry_start); entry_start += 2; - pp->alpha = png_get_uint_16(entry_start); entry_start += 2; - } - pp->frequency = png_get_uint_16(entry_start); entry_start += 2; - } -#else - pp = new_palette.entries; - for (i = 0; i < new_palette.nentries; i++) - { - - if (new_palette.depth == 8) - { - pp[i].red = *entry_start++; - pp[i].green = *entry_start++; - pp[i].blue = *entry_start++; - pp[i].alpha = *entry_start++; - } - else - { - pp[i].red = png_get_uint_16(entry_start); entry_start += 2; - pp[i].green = png_get_uint_16(entry_start); entry_start += 2; - pp[i].blue = png_get_uint_16(entry_start); entry_start += 2; - pp[i].alpha = png_get_uint_16(entry_start); entry_start += 2; - } - pp->frequency = png_get_uint_16(entry_start); entry_start += 2; - } -#endif - - /* discard all chunk data except the name and stash that */ - new_palette.name = (png_charp)chunkdata; - - png_set_sPLT(png_ptr, info_ptr, &new_palette, 1); - - png_free(png_ptr, chunkdata); - png_free(png_ptr, new_palette.entries); -} -#endif /* PNG_READ_sPLT_SUPPORTED */ - -#if defined(PNG_READ_tRNS_SUPPORTED) -void /* PRIVATE */ -png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte readbuf[PNG_MAX_PALETTE_LENGTH]; - - png_debug(1, "in png_handle_tRNS\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tRNS"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid tRNS after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) - { - png_warning(png_ptr, "Duplicate tRNS chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (!(png_ptr->mode & PNG_HAVE_PLTE)) - { - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Missing PLTE before tRNS"); - } - else if (length > (png_uint_32)png_ptr->num_palette) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); - png_crc_finish(png_ptr, length); - return; - } - if (length == 0) - { - png_warning(png_ptr, "Zero length tRNS chunk"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, readbuf, (png_size_t)length); - png_ptr->num_trans = (png_uint_16)length; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - png_byte buf[6]; - - if (length != 6) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, (png_size_t)length); - png_ptr->num_trans = 1; - png_ptr->trans_values.red = png_get_uint_16(buf); - png_ptr->trans_values.green = png_get_uint_16(buf + 2); - png_ptr->trans_values.blue = png_get_uint_16(buf + 4); - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) - { - png_byte buf[6]; - - if (length != 2) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 2); - png_ptr->num_trans = 1; - png_ptr->trans_values.gray = png_get_uint_16(buf); - } - else - { - png_warning(png_ptr, "tRNS chunk not allowed with alpha channel"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_crc_finish(png_ptr, 0)) - return; - - png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans, - &(png_ptr->trans_values)); -} -#endif - -#if defined(PNG_READ_bKGD_SUPPORTED) -void /* PRIVATE */ -png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_size_t truelen; - png_byte buf[6]; - - png_debug(1, "in png_handle_bKGD\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before bKGD"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid bKGD after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - { - png_warning(png_ptr, "Missing PLTE before bKGD"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)) - { - png_warning(png_ptr, "Duplicate bKGD chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - truelen = 1; - else if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - truelen = 6; - else - truelen = 2; - - if (length != truelen) - { - png_warning(png_ptr, "Incorrect bKGD chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, truelen); - if (png_crc_finish(png_ptr, 0)) - return; - - /* We convert the index value into RGB components so that we can allow - * arbitrary RGB values for background when we have transparency, and - * so it is easy to determine the RGB values of the background color - * from the info_ptr struct. */ - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_ptr->background.index = buf[0]; - if(info_ptr->num_palette) - { - if(buf[0] > info_ptr->num_palette) - { - png_warning(png_ptr, "Incorrect bKGD chunk index value"); - return; - } - png_ptr->background.red = - (png_uint_16)png_ptr->palette[buf[0]].red; - png_ptr->background.green = - (png_uint_16)png_ptr->palette[buf[0]].green; - png_ptr->background.blue = - (png_uint_16)png_ptr->palette[buf[0]].blue; - } - } - else if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) /* GRAY */ - { - png_ptr->background.red = - png_ptr->background.green = - png_ptr->background.blue = - png_ptr->background.gray = png_get_uint_16(buf); - } - else - { - png_ptr->background.red = png_get_uint_16(buf); - png_ptr->background.green = png_get_uint_16(buf + 2); - png_ptr->background.blue = png_get_uint_16(buf + 4); - } - - png_set_bKGD(png_ptr, info_ptr, &(png_ptr->background)); -} -#endif - -#if defined(PNG_READ_hIST_SUPPORTED) -void /* PRIVATE */ -png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - int num, i; - png_uint_16 readbuf[PNG_MAX_PALETTE_LENGTH]; - - png_debug(1, "in png_handle_hIST\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before hIST"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid hIST after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (!(png_ptr->mode & PNG_HAVE_PLTE)) - { - png_warning(png_ptr, "Missing PLTE before hIST"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)) - { - png_warning(png_ptr, "Duplicate hIST chunk"); - png_crc_finish(png_ptr, length); - return; - } - - num = (int)length / 2 ; - if (num != png_ptr->num_palette) - { - png_warning(png_ptr, "Incorrect hIST chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - for (i = 0; i < num; i++) - { - png_byte buf[2]; - - png_crc_read(png_ptr, buf, 2); - readbuf[i] = png_get_uint_16(buf); - } - - if (png_crc_finish(png_ptr, 0)) - return; - - png_set_hIST(png_ptr, info_ptr, readbuf); -} -#endif - -#if defined(PNG_READ_pHYs_SUPPORTED) -void /* PRIVATE */ -png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[9]; - png_uint_32 res_x, res_y; - int unit_type; - - png_debug(1, "in png_handle_pHYs\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pHYs"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid pHYs after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) - { - png_warning(png_ptr, "Duplicate pHYs chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 9) - { - png_warning(png_ptr, "Incorrect pHYs chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 9); - if (png_crc_finish(png_ptr, 0)) - return; - - res_x = png_get_uint_32(buf); - res_y = png_get_uint_32(buf + 4); - unit_type = buf[8]; - png_set_pHYs(png_ptr, info_ptr, res_x, res_y, unit_type); -} -#endif - -#if defined(PNG_READ_oFFs_SUPPORTED) -void /* PRIVATE */ -png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[9]; - png_int_32 offset_x, offset_y; - int unit_type; - - png_debug(1, "in png_handle_oFFs\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before oFFs"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid oFFs after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) - { - png_warning(png_ptr, "Duplicate oFFs chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 9) - { - png_warning(png_ptr, "Incorrect oFFs chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 9); - if (png_crc_finish(png_ptr, 0)) - return; - - offset_x = png_get_int_32(buf); - offset_y = png_get_int_32(buf + 4); - unit_type = buf[8]; - png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, unit_type); -} -#endif - -#if defined(PNG_READ_pCAL_SUPPORTED) -/* read the pCAL chunk (described in the PNG Extensions document) */ -void /* PRIVATE */ -png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_charp purpose; - png_int_32 X0, X1; - png_byte type, nparams; - png_charp buf, units, endptr; - png_charpp params; - png_size_t slength; - int i; - - png_debug(1, "in png_handle_pCAL\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pCAL"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid pCAL after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)) - { - png_warning(png_ptr, "Duplicate pCAL chunk"); - png_crc_finish(png_ptr, length); - return; - } - - png_debug1(2, "Allocating and reading pCAL chunk data (%lu bytes)\n", - length + 1); - purpose = (png_charp)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)purpose, slength); - - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, purpose); - return; - } - - purpose[slength] = 0x00; /* null terminate the last string */ - - png_debug(3, "Finding end of pCAL purpose string\n"); - for (buf = purpose; *buf; buf++) - /* empty loop */ ; - - endptr = purpose + slength; - - /* We need to have at least 12 bytes after the purpose string - in order to get the parameter information. */ - if (endptr <= buf + 12) - { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, purpose); - return; - } - - png_debug(3, "Reading pCAL X0, X1, type, nparams, and units\n"); - X0 = png_get_int_32((png_bytep)buf+1); - X1 = png_get_int_32((png_bytep)buf+5); - type = buf[9]; - nparams = buf[10]; - units = buf + 11; - - png_debug(3, "Checking pCAL equation type and number of parameters\n"); - /* Check that we have the right number of parameters for known - equation types. */ - if ((type == PNG_EQUATION_LINEAR && nparams != 2) || - (type == PNG_EQUATION_BASE_E && nparams != 3) || - (type == PNG_EQUATION_ARBITRARY && nparams != 3) || - (type == PNG_EQUATION_HYPERBOLIC && nparams != 4)) - { - png_warning(png_ptr, "Invalid pCAL parameters for equation type"); - png_free(png_ptr, purpose); - return; - } - else if (type >= PNG_EQUATION_LAST) - { - png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); - } - - for (buf = units; *buf; buf++) - /* Empty loop to move past the units string. */ ; - - png_debug(3, "Allocating pCAL parameters array\n"); - params = (png_charpp)png_malloc(png_ptr, (png_uint_32)(nparams - *sizeof(png_charp))) ; - - /* Get pointers to the start of each parameter string. */ - for (i = 0; i < (int)nparams; i++) - { - buf++; /* Skip the null string terminator from previous parameter. */ - - png_debug1(3, "Reading pCAL parameter %d\n", i); - for (params[i] = buf; *buf != 0x00 && buf <= endptr; buf++) - /* Empty loop to move past each parameter string */ ; - - /* Make sure we haven't run out of data yet */ - if (buf > endptr) - { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, purpose); - png_free(png_ptr, params); - return; - } - } - - png_set_pCAL(png_ptr, info_ptr, purpose, X0, X1, type, nparams, - units, params); - - png_free(png_ptr, purpose); - png_free(png_ptr, params); -} -#endif - -#if defined(PNG_READ_sCAL_SUPPORTED) -/* read the sCAL chunk */ -void /* PRIVATE */ -png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_charp buffer, ep; -#ifdef PNG_FLOATING_POINT_SUPPORTED - double width, height; - png_charp vp; -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - png_charp swidth, sheight; -#endif -#endif - png_size_t slength; - - png_debug(1, "in png_handle_sCAL\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sCAL"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sCAL after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL)) - { - png_warning(png_ptr, "Duplicate sCAL chunk"); - png_crc_finish(png_ptr, length); - return; - } - - png_debug1(2, "Allocating and reading sCAL chunk data (%lu bytes)\n", - length + 1); - buffer = (png_charp)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)buffer, slength); - - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, buffer); - return; - } - - buffer[slength] = 0x00; /* null terminate the last string */ - - ep = buffer + 1; /* skip unit byte */ - -#ifdef PNG_FLOATING_POINT_SUPPORTED - width = strtod(ep, &vp); - if (*vp) - { - png_warning(png_ptr, "malformed width string in sCAL chunk"); - return; - } -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - swidth = (png_charp)png_malloc(png_ptr, strlen(ep) + 1); - png_memcpy(swidth, ep, (png_size_t)strlen(ep)); -#endif -#endif - - for (ep = buffer; *ep; ep++) - /* empty loop */ ; - ep++; - -#ifdef PNG_FLOATING_POINT_SUPPORTED - height = strtod(ep, &vp); - if (*vp) - { - png_warning(png_ptr, "malformed height string in sCAL chunk"); - return; - } -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - sheight = (png_charp)png_malloc(png_ptr, strlen(ep) + 1); - png_memcpy(sheight, ep, (png_size_t)strlen(ep)); -#endif -#endif - - if (buffer + slength < ep -#ifdef PNG_FLOATING_POINT_SUPPORTED - || width <= 0. || height <= 0. -#endif - ) - { - png_warning(png_ptr, "Invalid sCAL data"); - png_free(png_ptr, buffer); -#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) - png_free(png_ptr, swidth); - png_free(png_ptr, sheight); -#endif - return; - } - - -#ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_sCAL(png_ptr, info_ptr, buffer[0], width, height); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - png_set_sCAL_s(png_ptr, info_ptr, buffer[0], swidth, sheight); -#endif -#endif - - png_free(png_ptr, buffer); -#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) - png_free(png_ptr, swidth); - png_free(png_ptr, sheight); -#endif -} -#endif - -#if defined(PNG_READ_tIME_SUPPORTED) -void /* PRIVATE */ -png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[7]; - png_time mod_time; - - png_debug(1, "in png_handle_tIME\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Out of place tIME chunk"); - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)) - { - png_warning(png_ptr, "Duplicate tIME chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - - if (length != 7) - { - png_warning(png_ptr, "Incorrect tIME chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 7); - if (png_crc_finish(png_ptr, 0)) - return; - - mod_time.second = buf[6]; - mod_time.minute = buf[5]; - mod_time.hour = buf[4]; - mod_time.day = buf[3]; - mod_time.month = buf[2]; - mod_time.year = png_get_uint_16(buf); - - png_set_tIME(png_ptr, info_ptr, &mod_time); -} -#endif - -#if defined(PNG_READ_tEXt_SUPPORTED) -/* Note: this does not properly handle chunks that are > 64K under DOS */ -void /* PRIVATE */ -png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_textp text_ptr; - png_charp key; - png_charp text; - png_uint_32 skip = 0; - png_size_t slength; - - png_debug(1, "in png_handle_tEXt\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tEXt"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "tEXt chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - key = (png_charp)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)key, slength); - - if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, key); - return; - } - - key[slength] = 0x00; - - for (text = key; *text; text++) - /* empty loop to find end of key */ ; - - if (text != key + slength) - text++; - - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; - text_ptr->key = key; -#ifdef PNG_iTXt_SUPPORTED - text_ptr->lang = NULL; - text_ptr->lang_key = NULL; - text_ptr->itxt_length = 0; -#endif - text_ptr->text = text; - text_ptr->text_length = png_strlen(text); - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, key); - png_free(png_ptr, text_ptr); -} -#endif - -#if defined(PNG_READ_zTXt_SUPPORTED) -/* note: this does not correctly handle chunks that are > 64K under DOS */ -void /* PRIVATE */ -png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_textp text_ptr; - png_charp chunkdata; - png_charp text; - int comp_type; - png_size_t slength, prefix_len, data_len; - - png_debug(1, "in png_handle_zTXt\n"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before zTXt"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - -#ifdef PNG_MAX_MALLOC_64K - /* We will no doubt have problems with chunks even half this size, but - there is no hard and fast rule to tell us where to stop. */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr,"zTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; - } -#endif - - chunkdata = (png_charp)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)chunkdata, slength); - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, chunkdata); - return; - } - - chunkdata[slength] = 0x00; - - for (text = chunkdata; *text; text++) - /* empty loop */ ; - - /* zTXt must have some text after the chunkdataword */ - if (text == chunkdata + slength) - { - comp_type = PNG_TEXT_COMPRESSION_NONE; - png_warning(png_ptr, "Zero length zTXt chunk"); - } - else - { - comp_type = *(++text); - if (comp_type != PNG_TEXT_COMPRESSION_zTXt) - { - png_warning(png_ptr, "Unknown compression type in zTXt chunk"); - comp_type = PNG_TEXT_COMPRESSION_zTXt; - } - text++; /* skip the compression_method byte */ - } - prefix_len = text - chunkdata; - - chunkdata = (png_charp)png_decompress_chunk(png_ptr, comp_type, chunkdata, - (png_size_t)length, prefix_len, &data_len); - - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = comp_type; - text_ptr->key = chunkdata; -#ifdef PNG_iTXt_SUPPORTED - text_ptr->lang = NULL; - text_ptr->lang_key = NULL; - text_ptr->itxt_length = 0; -#endif - text_ptr->text = chunkdata + prefix_len; - text_ptr->text_length = data_len; - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - png_free(png_ptr, chunkdata); -} -#endif - -#if defined(PNG_READ_iTXt_SUPPORTED) -/* note: this does not correctly handle chunks that are > 64K under DOS */ -void /* PRIVATE */ -png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_textp text_ptr; - png_charp chunkdata; - png_charp key, lang, text, lang_key; - int comp_flag; - int comp_type = 0; - png_size_t slength, prefix_len, data_len; - - png_debug(1, "in png_handle_iTXt\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before iTXt"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - -#ifdef PNG_MAX_MALLOC_64K - /* We will no doubt have problems with chunks even half this size, but - there is no hard and fast rule to tell us where to stop. */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr,"iTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; - } -#endif - - chunkdata = (png_charp)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)chunkdata, slength); - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, chunkdata); - return; - } - - chunkdata[slength] = 0x00; - - for (lang = chunkdata; *lang; lang++) - /* empty loop */ ; - lang++; /* skip NUL separator */ - - /* iTXt must have a language tag (possibly empty), two compression bytes, - translated keyword (possibly empty), and possibly some text after the - keyword */ - - if (lang >= chunkdata + slength) - { - comp_flag = PNG_TEXT_COMPRESSION_NONE; - png_warning(png_ptr, "Zero length iTXt chunk"); - } - else - { - comp_flag = *lang++; - comp_type = *lang++; - } - - for (lang_key = lang; *lang_key; lang_key++) - /* empty loop */ ; - lang_key++; /* skip NUL separator */ - - for (text = lang_key; *text; text++) - /* empty loop */ ; - text++; /* skip NUL separator */ - - prefix_len = text - chunkdata; - - key=chunkdata; - if (comp_flag) - chunkdata = png_decompress_chunk(png_ptr, comp_type, chunkdata, - (size_t)length, prefix_len, &data_len); - else - data_len=png_strlen(chunkdata + prefix_len); - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = (int)comp_flag + 1; - text_ptr->lang_key = chunkdata+(lang_key-key); - text_ptr->lang = chunkdata+(lang-key); - text_ptr->itxt_length = data_len; - text_ptr->text_length = 0; - text_ptr->key = chunkdata; - text_ptr->text = chunkdata + prefix_len; - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - png_free(png_ptr, chunkdata); -} -#endif - -/* This function is called when we haven't found a handler for a - chunk. If there isn't a problem with the chunk itself (ie bad - chunk name, CRC, or a critical chunk), the chunk is silently ignored - -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which - case it will be saved away to be written out later. */ -void /* PRIVATE */ -png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_uint_32 skip = 0; - - png_debug(1, "in png_handle_unknown\n"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - { -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IDAT; -#endif - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* not an IDAT */ - png_ptr->mode |= PNG_AFTER_IDAT; - } - - png_check_chunk_name(png_ptr, png_ptr->chunk_name); - - if (!(png_ptr->chunk_name[0] & 0x20)) - { -#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) - if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != - HANDLE_CHUNK_ALWAYS -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) - && png_ptr->read_user_chunk_fn == (png_user_chunk_ptr)NULL -#endif - ) -#endif - png_chunk_error(png_ptr, "unknown critical chunk"); - } - -#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) - if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) - { - png_unknown_chunk chunk; - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "unknown chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - strcpy((png_charp)chunk.name, (png_charp)png_ptr->chunk_name); - chunk.data = (png_bytep)png_malloc(png_ptr, length); - png_crc_read(png_ptr, chunk.data, length); - chunk.size = length; -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) - if(png_ptr->read_user_chunk_fn != (png_user_chunk_ptr)NULL) - { - /* callback to user unknown chunk handler */ - if ((*(png_ptr->read_user_chunk_fn)) (png_ptr, &chunk) <= 0) - { - if (!(png_ptr->chunk_name[0] & 0x20)) - if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != - HANDLE_CHUNK_ALWAYS) - png_chunk_error(png_ptr, "unknown critical chunk"); - png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1); - } - } - else -#endif - png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1); - png_free(png_ptr, chunk.data); - } - else -#endif - skip = length; - - png_crc_finish(png_ptr, skip); - -#if !defined(PNG_READ_USER_CHUNKS_SUPPORTED) - if (info_ptr == NULL) - /* quiet compiler warnings about unused info_ptr */ ; -#endif -} - -/* This function is called to verify that a chunk name is valid. - This function can't have the "critical chunk check" incorporated - into it, since in the future we will need to be able to call user - functions to handle unknown critical chunks after we check that - the chunk name itself is valid. */ - -#define isnonalpha(c) ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97)) - -void /* PRIVATE */ -png_check_chunk_name(png_structp png_ptr, png_bytep chunk_name) -{ - png_debug(1, "in png_check_chunk_name\n"); - if (isnonalpha(chunk_name[0]) || isnonalpha(chunk_name[1]) || - isnonalpha(chunk_name[2]) || isnonalpha(chunk_name[3])) - { - png_chunk_error(png_ptr, "invalid chunk type"); - } -} - -/* Combines the row recently read in with the existing pixels in the - row. This routine takes care of alpha and transparency if requested. - This routine also handles the two methods of progressive display - of interlaced images, depending on the mask value. - The mask value describes which pixels are to be combined with - the row. The pattern always repeats every 8 pixels, so just 8 - bits are needed. A one indicates the pixel is to be combined, - a zero indicates the pixel is to be skipped. This is in addition - to any alpha or transparency value associated with the pixel. If - you want all pixels to be combined, pass 0xff (255) in mask. */ -#ifndef PNG_HAVE_ASSEMBLER_COMBINE_ROW -void /* PRIVATE */ -png_combine_row(png_structp png_ptr, png_bytep row, int mask) -{ - png_debug(1,"in png_combine_row\n"); - if (mask == 0xff) - { - png_memcpy(row, png_ptr->row_buf + 1, - (png_size_t)((png_ptr->width * - png_ptr->row_info.pixel_depth + 7) >> 3)); - } - else - { - switch (png_ptr->row_info.pixel_depth) - { - case 1: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - int s_inc, s_start, s_end; - int m = 0x80; - int shift; - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 7; - s_inc = 1; - } - else -#endif - { - s_start = 7; - s_end = 0; - s_inc = -1; - } - - shift = s_start; - - for (i = 0; i < row_width; i++) - { - if (m & mask) - { - int value; - - value = (*sp >> shift) & 0x01; - *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - case 2: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - int s_start, s_end, s_inc; - int m = 0x80; - int shift; - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - int value; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 6; - s_inc = 2; - } - else -#endif - { - s_start = 6; - s_end = 0; - s_inc = -2; - } - - shift = s_start; - - for (i = 0; i < row_width; i++) - { - if (m & mask) - { - value = (*sp >> shift) & 0x03; - *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - case 4: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - int s_start, s_end, s_inc; - int m = 0x80; - int shift; - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - int value; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 4; - s_inc = 4; - } - else -#endif - { - s_start = 4; - s_end = 0; - s_inc = -4; - } - shift = s_start; - - for (i = 0; i < row_width; i++) - { - if (m & mask) - { - value = (*sp >> shift) & 0xf; - *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - default: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - png_size_t pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - png_byte m = 0x80; - - - for (i = 0; i < row_width; i++) - { - if (m & mask) - { - png_memcpy(dp, sp, pixel_bytes); - } - - sp += pixel_bytes; - dp += pixel_bytes; - - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - } - } -} -#endif /* !PNG_HAVE_ASSEMBLER_COMBINE_ROW */ - -#ifdef PNG_READ_INTERLACING_SUPPORTED -#ifndef PNG_HAVE_ASSEMBLER_READ_INTERLACE /* else in pngvcrd.c, pnggccrd.c */ -void /* PRIVATE */ -png_do_read_interlace(png_structp png_ptr) -{ - png_row_infop row_info = &(png_ptr->row_info); - png_bytep row = png_ptr->row_buf + 1; - int pass = png_ptr->pass; - png_uint_32 transformations = png_ptr->transformations; -#ifdef PNG_USE_LOCAL_ARRAYS - /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - /* offset to next interlace block */ - const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; -#endif - - png_debug(1,"in png_do_read_interlace (stock C version)\n"); - if (row != NULL && row_info != NULL) - { - png_uint_32 final_width; - - final_width = row_info->width * png_pass_inc[pass]; - - switch (row_info->pixel_depth) - { - case 1: - { - png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 3); - png_bytep dp = row + (png_size_t)((final_width - 1) >> 3); - int sshift, dshift; - int s_start, s_end, s_inc; - int jstop = png_pass_inc[pass]; - png_byte v; - png_uint_32 i; - int j; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (int)((row_info->width + 7) & 0x07); - dshift = (int)((final_width + 7) & 0x07); - s_start = 7; - s_end = 0; - s_inc = -1; - } - else -#endif - { - sshift = 7 - (int)((row_info->width + 7) & 0x07); - dshift = 7 - (int)((final_width + 7) & 0x07); - s_start = 0; - s_end = 7; - s_inc = 1; - } - - for (i = 0; i < row_info->width; i++) - { - v = (png_byte)((*sp >> sshift) & 0x01); - for (j = 0; j < jstop; j++) - { - *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - case 2: - { - png_bytep sp = row + (png_uint_32)((row_info->width - 1) >> 2); - png_bytep dp = row + (png_uint_32)((final_width - 1) >> 2); - int sshift, dshift; - int s_start, s_end, s_inc; - int jstop = png_pass_inc[pass]; - png_uint_32 i; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (int)(((row_info->width + 3) & 0x03) << 1); - dshift = (int)(((final_width + 3) & 0x03) << 1); - s_start = 6; - s_end = 0; - s_inc = -2; - } - else -#endif - { - sshift = (int)((3 - ((row_info->width + 3) & 0x03)) << 1); - dshift = (int)((3 - ((final_width + 3) & 0x03)) << 1); - s_start = 0; - s_end = 6; - s_inc = 2; - } - - for (i = 0; i < row_info->width; i++) - { - png_byte v; - int j; - - v = (png_byte)((*sp >> sshift) & 0x03); - for (j = 0; j < jstop; j++) - { - *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - case 4: - { - png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 1); - png_bytep dp = row + (png_size_t)((final_width - 1) >> 1); - int sshift, dshift; - int s_start, s_end, s_inc; - png_uint_32 i; - int jstop = png_pass_inc[pass]; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (int)(((row_info->width + 1) & 0x01) << 2); - dshift = (int)(((final_width + 1) & 0x01) << 2); - s_start = 4; - s_end = 0; - s_inc = -4; - } - else -#endif - { - sshift = (int)((1 - ((row_info->width + 1) & 0x01)) << 2); - dshift = (int)((1 - ((final_width + 1) & 0x01)) << 2); - s_start = 0; - s_end = 4; - s_inc = 4; - } - - for (i = 0; i < row_info->width; i++) - { - png_byte v = (png_byte)((*sp >> sshift) & 0xf); - int j; - - for (j = 0; j < jstop; j++) - { - *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - default: - { - png_size_t pixel_bytes = (row_info->pixel_depth >> 3); - png_bytep sp = row + (png_size_t)(row_info->width - 1) * pixel_bytes; - png_bytep dp = row + (png_size_t)(final_width - 1) * pixel_bytes; - - int jstop = png_pass_inc[pass]; - png_uint_32 i; - - for (i = 0; i < row_info->width; i++) - { - png_byte v[8]; - int j; - - png_memcpy(v, sp, pixel_bytes); - for (j = 0; j < jstop; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sp -= pixel_bytes; - } - break; - } - } - row_info->width = final_width; - row_info->rowbytes = ((final_width * - (png_uint_32)row_info->pixel_depth + 7) >> 3); - } -#if !defined(PNG_READ_PACKSWAP_SUPPORTED) - /* silence compiler warning */ - if (transformations) - return; -#endif -} -#endif /* !PNG_HAVE_ASSEMBLER_READ_INTERLACE */ -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - -#ifndef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW -void /* PRIVATE */ -png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row, - png_bytep prev_row, int filter) -{ - png_debug(1, "in png_read_filter_row\n"); - png_debug2(2,"row = %lu, filter = %d\n", png_ptr->row_number, filter); - switch (filter) - { - case PNG_FILTER_VALUE_NONE: - break; - case PNG_FILTER_VALUE_SUB: - { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_bytep rp = row + bpp; - png_bytep lp = row; - - for (i = bpp; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff); - rp++; - } - break; - } - case PNG_FILTER_VALUE_UP: - { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_bytep rp = row; - png_bytep pp = prev_row; - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); - rp++; - } - break; - } - case PNG_FILTER_VALUE_AVG: - { - png_uint_32 i; - png_bytep rp = row; - png_bytep pp = prev_row; - png_bytep lp = row; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_uint_32 istop = row_info->rowbytes - bpp; - - for (i = 0; i < bpp; i++) - { - *rp = (png_byte)(((int)(*rp) + - ((int)(*pp++) / 2 )) & 0xff); - rp++; - } - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + - (int)(*pp++ + *lp++) / 2 ) & 0xff); - rp++; - } - break; - } - case PNG_FILTER_VALUE_PAETH: - { - png_uint_32 i; - png_bytep rp = row; - png_bytep pp = prev_row; - png_bytep lp = row; - png_bytep cp = prev_row; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_uint_32 istop=row_info->rowbytes - bpp; - - for (i = 0; i < bpp; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); - rp++; - } - - for (i = 0; i < istop; i++) /* use leftover rp,pp */ - { - int a, b, c, pa, pb, pc, p; - - a = *lp++; - b = *pp++; - c = *cp++; - - p = b - c; - pc = a - c; - -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - - /* - if (pa <= pb && pa <= pc) - p = a; - else if (pb <= pc) - p = b; - else - p = c; - */ - - p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; - - *rp = (png_byte)(((int)(*rp) + p) & 0xff); - rp++; - } - break; - } - default: - png_warning(png_ptr, "Ignoring bad adaptive filter type"); - *row=0; - break; - } -} -#endif /* !PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */ - -void /* PRIVATE */ -png_read_finish_row(png_structp png_ptr) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* start of interlace block */ - const int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* offset to next interlace block */ - const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - /* start of interlace block in the y direction */ - const int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; - - /* offset to next interlace block in the y direction */ - const int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif - - png_debug(1, "in png_read_finish_row\n"); - png_ptr->row_number++; - if (png_ptr->row_number < png_ptr->num_rows) - return; - - if (png_ptr->interlaced) - { - png_ptr->row_number = 0; - png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1); - do - { - png_ptr->pass++; - if (png_ptr->pass >= 7) - break; - png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - png_ptr->irowbytes = ((png_ptr->iwidth * - (png_uint_32)png_ptr->pixel_depth + 7) >> 3) +1; - - if (!(png_ptr->transformations & PNG_INTERLACE)) - { - png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; - if (!(png_ptr->num_rows)) - continue; - } - else /* if (png_ptr->transformations & PNG_INTERLACE) */ - break; - } while (png_ptr->iwidth == 0); - - if (png_ptr->pass < 7) - return; - } - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) - { -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IDAT; -#endif - char extra; - int ret; - - png_ptr->zstream.next_out = (Byte *)&extra; - png_ptr->zstream.avail_out = (uInt)1; - for(;;) - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_byte chunk_length[4]; - - png_crc_finish(png_ptr, 0); - - png_read_data(png_ptr, chunk_length, 4); - png_ptr->idat_size = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4)) - png_error(png_ptr, "Not enough image data"); - - } - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret == Z_STREAM_END) - { - if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_error(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression Error"); - - if (!(png_ptr->zstream.avail_out)) - png_error(png_ptr, "Extra compressed data"); - - } - png_ptr->zstream.avail_out = 0; - } - - if (png_ptr->idat_size || png_ptr->zstream.avail_in) - png_error(png_ptr, "Extra compression data"); - - inflateReset(&png_ptr->zstream); - - png_ptr->mode |= PNG_AFTER_IDAT; -} - -void /* PRIVATE */ -png_read_start_row(png_structp png_ptr) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* start of interlace block */ - const int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* offset to next interlace block */ - const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - /* start of interlace block in the y direction */ - const int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; - - /* offset to next interlace block in the y direction */ - const int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif - - int max_pixel_depth; - png_uint_32 row_bytes; - - png_debug(1, "in png_read_start_row\n"); - png_ptr->zstream.avail_in = 0; - png_init_read_transformations(png_ptr); - if (png_ptr->interlaced) - { - if (!(png_ptr->transformations & PNG_INTERLACE)) - png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - - png_pass_ystart[0]) / png_pass_yinc[0]; - else - png_ptr->num_rows = png_ptr->height; - - png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - - row_bytes = ((png_ptr->iwidth * - (png_uint_32)png_ptr->pixel_depth + 7) >> 3) +1; - png_ptr->irowbytes = (png_size_t)row_bytes; - if((png_uint_32)png_ptr->irowbytes != row_bytes) - png_error(png_ptr, "Rowbytes overflow in png_read_start_row"); - } - else - { - png_ptr->num_rows = png_ptr->height; - png_ptr->iwidth = png_ptr->width; - png_ptr->irowbytes = png_ptr->rowbytes + 1; - } - max_pixel_depth = png_ptr->pixel_depth; - -#if defined(PNG_READ_PACK_SUPPORTED) - if ((png_ptr->transformations & PNG_PACK) && png_ptr->bit_depth < 8) - max_pixel_depth = 8; -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) - if (png_ptr->transformations & PNG_EXPAND) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (png_ptr->num_trans) - max_pixel_depth = 32; - else - max_pixel_depth = 24; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) - { - if (max_pixel_depth < 8) - max_pixel_depth = 8; - if (png_ptr->num_trans) - max_pixel_depth *= 2; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - if (png_ptr->num_trans) - { - max_pixel_depth *= 4; - max_pixel_depth /= 3; - } - } - } -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & (PNG_FILLER)) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - max_pixel_depth = 32; - else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) - { - if (max_pixel_depth <= 8) - max_pixel_depth = 16; - else - max_pixel_depth = 32; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - if (max_pixel_depth <= 32) - max_pixel_depth = 32; - else - max_pixel_depth = 64; - } - } -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) - if (png_ptr->transformations & PNG_GRAY_TO_RGB) - { - if ( -#if defined(PNG_READ_EXPAND_SUPPORTED) - (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) || -#endif -#if defined(PNG_READ_FILLER_SUPPORTED) - (png_ptr->transformations & (PNG_FILLER)) || -#endif - png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - if (max_pixel_depth <= 16) - max_pixel_depth = 32; - else - max_pixel_depth = 64; - } - else - { - if (max_pixel_depth <= 8) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - max_pixel_depth = 32; - else - max_pixel_depth = 24; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - max_pixel_depth = 64; - else - max_pixel_depth = 48; - } - } -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) && \ -defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) - if(png_ptr->transformations & PNG_USER_TRANSFORM) - { - int user_pixel_depth=png_ptr->user_transform_depth* - png_ptr->user_transform_channels; - if(user_pixel_depth > max_pixel_depth) - max_pixel_depth=user_pixel_depth; - } -#endif - - /* align the width on the next larger 8 pixels. Mainly used - for interlacing */ - row_bytes = ((png_ptr->width + 7) & ~((png_uint_32)7)); - /* calculate the maximum bytes needed, adding a byte and a pixel - for safety's sake */ - row_bytes = ((row_bytes * (png_uint_32)max_pixel_depth + 7) >> 3) + - 1 + ((max_pixel_depth + 7) >> 3); -#ifdef PNG_MAX_MALLOC_64K - if (row_bytes > (png_uint_32)65536L) - png_error(png_ptr, "This image requires a row greater than 64KB"); -#endif - png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, row_bytes); - -#ifdef PNG_MAX_MALLOC_64K - if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L) - png_error(png_ptr, "This image requires a row greater than 64KB"); -#endif - png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)( - png_ptr->rowbytes + 1)); - - png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1); - - png_debug1(3, "width = %lu,\n", png_ptr->width); - png_debug1(3, "height = %lu,\n", png_ptr->height); - png_debug1(3, "iwidth = %lu,\n", png_ptr->iwidth); - png_debug1(3, "num_rows = %lu\n", png_ptr->num_rows); - png_debug1(3, "rowbytes = %lu,\n", png_ptr->rowbytes); - png_debug1(3, "irowbytes = %lu,\n", png_ptr->irowbytes); - - png_ptr->flags |= PNG_FLAG_ROW_INIT; -} diff --git a/libraries/libpng-1.0.9/pngset.c b/libraries/libpng-1.0.9/pngset.c deleted file mode 100644 index 970b81d..0000000 --- a/libraries/libpng-1.0.9/pngset.c +++ /dev/null @@ -1,909 +0,0 @@ - -/* pngset.c - storage of image information into info struct - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * The functions here are used during reads to store data from the file - * into the info struct, and during writes to store application data - * into the info struct for writing into the file. This abstracts the - * info struct and allows us to change the structure in the future. - */ - -#define PNG_INTERNAL -#include "png.h" - -#if defined(PNG_bKGD_SUPPORTED) -void PNGAPI -png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) -{ - png_debug1(1, "in %s storage function\n", "bKGD"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_memcpy(&(info_ptr->background), background, sizeof(png_color_16)); - info_ptr->valid |= PNG_INFO_bKGD; -} -#endif - -#if defined(PNG_cHRM_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_cHRM(png_structp png_ptr, png_infop info_ptr, - double white_x, double white_y, double red_x, double red_y, - double green_x, double green_y, double blue_x, double blue_y) -{ - png_debug1(1, "in %s storage function\n", "cHRM"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->x_white = (float)white_x; - info_ptr->y_white = (float)white_y; - info_ptr->x_red = (float)red_x; - info_ptr->y_red = (float)red_y; - info_ptr->x_green = (float)green_x; - info_ptr->y_green = (float)green_y; - info_ptr->x_blue = (float)blue_x; - info_ptr->y_blue = (float)blue_y; -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5); - info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5); - info_ptr->int_x_red = (png_fixed_point)(red_x*100000.+0.5); - info_ptr->int_y_red = (png_fixed_point)(red_y*100000.+0.5); - info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5); - info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5); - info_ptr->int_x_blue = (png_fixed_point)(blue_x*100000.+0.5); - info_ptr->int_y_blue = (png_fixed_point)(blue_y*100000.+0.5); -#endif - info_ptr->valid |= PNG_INFO_cHRM; -} -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -void PNGAPI -png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, - png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, - png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, - png_fixed_point blue_x, png_fixed_point blue_y) -{ - png_debug1(1, "in %s storage function\n", "cHRM"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->int_x_white = white_x; - info_ptr->int_y_white = white_y; - info_ptr->int_x_red = red_x; - info_ptr->int_y_red = red_y; - info_ptr->int_x_green = green_x; - info_ptr->int_y_green = green_y; - info_ptr->int_x_blue = blue_x; - info_ptr->int_y_blue = blue_y; -#ifdef PNG_FLOATING_POINT_SUPPORTED - info_ptr->x_white = (float)(white_x/100000.); - info_ptr->y_white = (float)(white_y/100000.); - info_ptr->x_red = (float)(red_x/100000.); - info_ptr->y_red = (float)(red_y/100000.); - info_ptr->x_green = (float)(green_x/100000.); - info_ptr->y_green = (float)(green_y/100000.); - info_ptr->x_blue = (float)(blue_x/100000.); - info_ptr->y_blue = (float)(blue_y/100000.); -#endif - info_ptr->valid |= PNG_INFO_cHRM; -} -#endif -#endif - -#if defined(PNG_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) -{ - png_debug1(1, "in %s storage function\n", "gAMA"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->gamma = (float)file_gamma; -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = (int)(file_gamma*100000.+.5); -#endif - info_ptr->valid |= PNG_INFO_gAMA; -} -#endif -#endif -void PNGAPI -png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point - int_gamma) -{ - png_debug1(1, "in %s storage function\n", "gAMA"); - if (png_ptr == NULL || info_ptr == NULL) - return; - -#ifdef PNG_FLOATING_POINT_SUPPORTED - info_ptr->gamma = (float)(int_gamma/100000.); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = int_gamma; -#endif - info_ptr->valid |= PNG_INFO_gAMA; -} - -#if defined(PNG_hIST_SUPPORTED) -void PNGAPI -png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) -{ - int i; - - png_debug1(1, "in %s storage function\n", "hIST"); - if (png_ptr == NULL || info_ptr == NULL) - return; - if (info_ptr->num_palette == 0) - png_warning(png_ptr, - "Palette size 0, hIST allocation skipped."); - -#ifdef PNG_FREE_ME_SUPPORTED - png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); -#endif - png_ptr->hist = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(info_ptr->num_palette * sizeof (png_uint_16))); - - for (i = 0; i < info_ptr->num_palette; i++) - png_ptr->hist[i] = hist[i]; - info_ptr->hist = png_ptr->hist; - info_ptr->valid |= PNG_INFO_hIST; - -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_HIST; -#else - png_ptr->flags |= PNG_FLAG_FREE_HIST; -#endif -} -#endif - -void PNGAPI -png_set_IHDR(png_structp png_ptr, png_infop info_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_type, int compression_type, - int filter_type) -{ - int rowbytes_per_pixel; - png_debug1(1, "in %s storage function\n", "IHDR"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->width = width; - info_ptr->height = height; - info_ptr->bit_depth = (png_byte)bit_depth; - info_ptr->color_type =(png_byte) color_type; - info_ptr->compression_type = (png_byte)compression_type; - info_ptr->filter_type = (png_byte)filter_type; - info_ptr->interlace_type = (png_byte)interlace_type; - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - info_ptr->channels = 1; - else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) - info_ptr->channels = 3; - else - info_ptr->channels = 1; - if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) - info_ptr->channels++; - info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); - - /* check for overflow */ - rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3; - if (( width > PNG_MAX_UINT/rowbytes_per_pixel)) - { - png_warning(png_ptr, - "Width too large to process image data; rowbytes will overflow."); - info_ptr->rowbytes = (png_size_t)0; - } - else - info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3; -} - -#if defined(PNG_oFFs_SUPPORTED) -void PNGAPI -png_set_oFFs(png_structp png_ptr, png_infop info_ptr, - png_int_32 offset_x, png_int_32 offset_y, int unit_type) -{ - png_debug1(1, "in %s storage function\n", "oFFs"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->x_offset = offset_x; - info_ptr->y_offset = offset_y; - info_ptr->offset_unit_type = (png_byte)unit_type; - info_ptr->valid |= PNG_INFO_oFFs; -} -#endif - -#if defined(PNG_pCAL_SUPPORTED) -void PNGAPI -png_set_pCAL(png_structp png_ptr, png_infop info_ptr, - png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, - png_charp units, png_charpp params) -{ - png_uint_32 length; - int i; - - png_debug1(1, "in %s storage function\n", "pCAL"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - length = png_strlen(purpose) + 1; - png_debug1(3, "allocating purpose for info (%lu bytes)\n", length); - info_ptr->pcal_purpose = (png_charp)png_malloc(png_ptr, length); - png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); - - png_debug(3, "storing X0, X1, type, and nparams in info\n"); - info_ptr->pcal_X0 = X0; - info_ptr->pcal_X1 = X1; - info_ptr->pcal_type = (png_byte)type; - info_ptr->pcal_nparams = (png_byte)nparams; - - length = png_strlen(units) + 1; - png_debug1(3, "allocating units for info (%lu bytes)\n", length); - info_ptr->pcal_units = (png_charp)png_malloc(png_ptr, length); - png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); - - info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr, - (png_uint_32)((nparams + 1) * sizeof(png_charp))); - info_ptr->pcal_params[nparams] = NULL; - - for (i = 0; i < nparams; i++) - { - length = png_strlen(params[i]) + 1; - png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length); - info_ptr->pcal_params[i] = (png_charp)png_malloc(png_ptr, length); - png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); - } - - info_ptr->valid |= PNG_INFO_pCAL; -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_PCAL; -#endif -} -#endif - -#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_sCAL(png_structp png_ptr, png_infop info_ptr, - int unit, double width, double height) -{ - png_debug1(1, "in %s storage function\n", "sCAL"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->scal_unit = (png_byte)unit; - info_ptr->scal_pixel_width = width; - info_ptr->scal_pixel_height = height; - - info_ptr->valid |= PNG_INFO_sCAL; -} -#else -#ifdef PNG_FIXED_POINT_SUPPORTED -void PNGAPI -png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, - int unit, png_charp swidth, png_charp sheight) -{ - png_uint_32 length; - - png_debug1(1, "in %s storage function\n", "sCAL"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->scal_unit = (png_byte)unit; - - length = png_strlen(swidth) + 1; - png_debug1(3, "allocating unit for info (%d bytes)\n", length); - info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length); - png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length); - - length = png_strlen(sheight) + 1; - png_debug1(3, "allocating unit for info (%d bytes)\n", length); - info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length); - png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length); - - info_ptr->valid |= PNG_INFO_sCAL; -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_SCAL; -#endif -} -#endif -#endif -#endif - -#if defined(PNG_pHYs_SUPPORTED) -void PNGAPI -png_set_pHYs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 res_x, png_uint_32 res_y, int unit_type) -{ - png_debug1(1, "in %s storage function\n", "pHYs"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->x_pixels_per_unit = res_x; - info_ptr->y_pixels_per_unit = res_y; - info_ptr->phys_unit_type = (png_byte)unit_type; - info_ptr->valid |= PNG_INFO_pHYs; -} -#endif - -void PNGAPI -png_set_PLTE(png_structp png_ptr, png_infop info_ptr, - png_colorp palette, int num_palette) -{ - - png_debug1(1, "in %s storage function\n", "PLTE"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - /* - * It may not actually be necessary to set png_ptr->palette here; - * we do it for backward compatibility with the way the png_handle_tRNS - * function used to do the allocation. - */ -#ifdef PNG_FREE_ME_SUPPORTED - png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); -#endif - png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)num_palette, - sizeof (png_color)); - memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color)); - info_ptr->palette = png_ptr->palette; - info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; - -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_PLTE; -#else - png_ptr->flags |= PNG_FLAG_FREE_PLTE; -#endif - - info_ptr->valid |= PNG_INFO_PLTE; -} - -#if defined(PNG_sBIT_SUPPORTED) -void PNGAPI -png_set_sBIT(png_structp png_ptr, png_infop info_ptr, - png_color_8p sig_bit) -{ - png_debug1(1, "in %s storage function\n", "sBIT"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8)); - info_ptr->valid |= PNG_INFO_sBIT; -} -#endif - -#if defined(PNG_sRGB_SUPPORTED) -void PNGAPI -png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) -{ - png_debug1(1, "in %s storage function\n", "sRGB"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->srgb_intent = (png_byte)intent; - info_ptr->valid |= PNG_INFO_sRGB; -} - -void PNGAPI -png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, - int intent) -{ -#if defined(PNG_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED - float file_gamma; -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_fixed_point int_file_gamma; -#endif -#endif -#if defined(PNG_cHRM_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED - float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, - int_green_y, int_blue_x, int_blue_y; -#endif -#endif - png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_set_sRGB(png_ptr, info_ptr, intent); - -#if defined(PNG_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED - file_gamma = (float).45455; - png_set_gAMA(png_ptr, info_ptr, file_gamma); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - int_file_gamma = 45455L; - png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); -#endif -#endif - -#if defined(PNG_cHRM_SUPPORTED) -#ifdef PNG_FIXED_POINT_SUPPORTED - int_white_x = 31270L; - int_white_y = 32900L; - int_red_x = 64000L; - int_red_y = 33000L; - int_green_x = 30000L; - int_green_y = 60000L; - int_blue_x = 15000L; - int_blue_y = 6000L; - - png_set_cHRM_fixed(png_ptr, info_ptr, - int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y, - int_blue_x, int_blue_y); -#endif -#ifdef PNG_FLOATING_POINT_SUPPORTED - white_x = (float).3127; - white_y = (float).3290; - red_x = (float).64; - red_y = (float).33; - green_x = (float).30; - green_y = (float).60; - blue_x = (float).15; - blue_y = (float).06; - - png_set_cHRM(png_ptr, info_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); -#endif -#endif -} -#endif - - -#if defined(PNG_iCCP_SUPPORTED) -void PNGAPI -png_set_iCCP(png_structp png_ptr, png_infop info_ptr, - png_charp name, int compression_type, - png_charp profile, png_uint_32 proflen) -{ - png_charp new_iccp_name; - png_charp new_iccp_profile; - - png_debug1(1, "in %s storage function\n", "iCCP"); - if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) - return; - - new_iccp_name = png_malloc(png_ptr, png_strlen(name)+1); - strcpy(new_iccp_name, name); - new_iccp_profile = png_malloc(png_ptr, proflen); - png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); - - png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); - - info_ptr->iccp_proflen = proflen; - info_ptr->iccp_name = new_iccp_name; - info_ptr->iccp_profile = new_iccp_profile; - /* Compression is always zero but is here so the API and info structure - * does not have to change if we introduce multiple compression types */ - info_ptr->iccp_compression = (png_byte)compression_type; -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_ICCP; -#endif - info_ptr->valid |= PNG_INFO_iCCP; -} -#endif - -#if defined(PNG_TEXT_SUPPORTED) -void PNGAPI -png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, - int num_text) -{ - int i; - - png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ? - "text" : (png_const_charp)png_ptr->chunk_name)); - - if (png_ptr == NULL || info_ptr == NULL || num_text == 0) - return; - - /* Make sure we have enough space in the "text" array in info_struct - * to hold all of the incoming text_ptr objects. - */ - if (info_ptr->num_text + num_text > info_ptr->max_text) - { - if (info_ptr->text != NULL) - { - png_textp old_text; - int old_max; - - old_max = info_ptr->max_text; - info_ptr->max_text = info_ptr->num_text + num_text + 8; - old_text = info_ptr->text; - info_ptr->text = (png_textp)png_malloc(png_ptr, - (png_uint_32)(info_ptr->max_text * sizeof (png_text))); - png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * - sizeof(png_text))); - png_free(png_ptr, old_text); - } - else - { - info_ptr->max_text = num_text + 8; - info_ptr->num_text = 0; - info_ptr->text = (png_textp)png_malloc(png_ptr, - (png_uint_32)(info_ptr->max_text * sizeof (png_text))); -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_TEXT; -#endif - } - png_debug1(3, "allocated %d entries for info_ptr->text\n", - info_ptr->max_text); - } - for (i = 0; i < num_text; i++) - { - png_size_t text_length,key_len; - png_size_t lang_len,lang_key_len; - png_textp textp = &(info_ptr->text[info_ptr->num_text]); - - if (text_ptr[i].key == (png_charp)NULL) - continue; - - key_len = png_strlen(text_ptr[i].key); - - if(text_ptr[i].compression <= 0) - { - lang_len = 0; - lang_key_len = 0; - } - else -#ifdef PNG_iTXt_SUPPORTED - { - /* set iTXt data */ - if (text_ptr[i].key != (png_charp)NULL) - lang_len = png_strlen(text_ptr[i].lang); - else - lang_len = 0; - if (text_ptr[i].lang_key != (png_charp)NULL) - lang_key_len = png_strlen(text_ptr[i].lang_key); - else - lang_key_len = 0; - } -#else - { - png_warning(png_ptr, "iTXt chunk not supported."); - continue; - } -#endif - - if (text_ptr[i].text == (png_charp)NULL || text_ptr[i].text[0] == '\0') - { - text_length = 0; -#ifdef PNG_iTXt_SUPPORTED - if(text_ptr[i].compression > 0) - textp->compression = PNG_ITXT_COMPRESSION_NONE; - else -#endif - textp->compression = PNG_TEXT_COMPRESSION_NONE; - } - else - { - text_length = png_strlen(text_ptr[i].text); - textp->compression = text_ptr[i].compression; - } - - textp->key = (png_charp)png_malloc(png_ptr, - (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4)); - png_debug2(2, "Allocated %d bytes at %x in png_set_text\n", - key_len + lang_len + lang_key_len + text_length + 4, (int)textp->key); - - png_memcpy(textp->key, text_ptr[i].key, - (png_size_t)(key_len)); - *(textp->key+key_len) = '\0'; -#ifdef PNG_iTXt_SUPPORTED - if (text_ptr[i].compression > 0) - { - textp->lang=textp->key + key_len + 1; - png_memcpy(textp->lang, text_ptr[i].lang, lang_len); - *(textp->lang+lang_len) = '\0'; - textp->lang_key=textp->lang + lang_len + 1; - png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); - *(textp->lang_key+lang_key_len) = '\0'; - textp->text=textp->lang_key + lang_key_len + 1; - } - else -#endif - { -#ifdef PNG_iTXt_SUPPORTED - textp->lang=(png_charp)NULL; - textp->lang_key=(png_charp)NULL; -#endif - textp->text=textp->key + key_len + 1; - } - if(text_length) - png_memcpy(textp->text, text_ptr[i].text, - (png_size_t)(text_length)); - *(textp->text+text_length) = '\0'; - -#ifdef PNG_iTXt_SUPPORTED - if(textp->compression > 0) - { - textp->text_length = 0; - textp->itxt_length = text_length; - } - else -#endif - { - textp->text_length = text_length; -#ifdef PNG_iTXt_SUPPORTED - textp->itxt_length = 0; -#endif - } - info_ptr->text[info_ptr->num_text]= *textp; - info_ptr->num_text++; - png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text); - } -} -#endif - -#if defined(PNG_tIME_SUPPORTED) -void PNGAPI -png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) -{ - png_debug1(1, "in %s storage function\n", "tIME"); - if (png_ptr == NULL || info_ptr == NULL || - (png_ptr->mode & PNG_WROTE_tIME)) - return; - - png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time)); - info_ptr->valid |= PNG_INFO_tIME; -} -#endif - -#if defined(PNG_tRNS_SUPPORTED) -void PNGAPI -png_set_tRNS(png_structp png_ptr, png_infop info_ptr, - png_bytep trans, int num_trans, png_color_16p trans_values) -{ - png_debug1(1, "in %s storage function\n", "tRNS"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - if (trans != NULL) - { - /* - * It may not actually be necessary to set png_ptr->trans here; - * we do it for backward compatibility with the way the png_handle_tRNS - * function used to do the allocation. - */ -#ifdef PNG_FREE_ME_SUPPORTED - png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); -#endif - png_ptr->trans = info_ptr->trans = png_malloc(png_ptr, num_trans); - memcpy(info_ptr->trans, trans, num_trans); -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_TRNS; -#else - png_ptr->flags |= PNG_FLAG_FREE_TRNS; -#endif - } - - if (trans_values != NULL) - { - png_memcpy(&(info_ptr->trans_values), trans_values, - sizeof(png_color_16)); - if (num_trans == 0) - num_trans = 1; - } - info_ptr->num_trans = (png_uint_16)num_trans; - info_ptr->valid |= PNG_INFO_tRNS; -} -#endif - -#if defined(PNG_sPLT_SUPPORTED) -void PNGAPI -png_set_sPLT(png_structp png_ptr, - png_infop info_ptr, png_sPLT_tp entries, int nentries) -{ - png_sPLT_tp np; - int i; - - np = (png_sPLT_tp)png_malloc(png_ptr, - (info_ptr->splt_palettes_num + nentries) * sizeof(png_sPLT_t)); - - png_memcpy(np, info_ptr->splt_palettes, - info_ptr->splt_palettes_num * sizeof(png_sPLT_t)); - png_free(png_ptr, info_ptr->splt_palettes); - info_ptr->splt_palettes=NULL; - - for (i = 0; i < nentries; i++) - { - png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; - png_sPLT_tp from = entries + i; - - to->name = (png_charp)png_malloc(png_ptr, - png_strlen(from->name) + 1); - png_strcpy(to->name, from->name); - to->entries = (png_sPLT_entryp)png_malloc(png_ptr, - from->nentries * sizeof(png_sPLT_t)); - png_memcpy(to->entries, from->entries, - from->nentries * sizeof(png_sPLT_t)); - to->nentries = from->nentries; - to->depth = from->depth; - } - - info_ptr->splt_palettes = np; - info_ptr->splt_palettes_num += nentries; - info_ptr->valid |= PNG_INFO_sPLT; -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_SPLT; -#endif -} -#endif /* PNG_sPLT_SUPPORTED */ - -#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) -void PNGAPI -png_set_unknown_chunks(png_structp png_ptr, - png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns) -{ - png_unknown_chunkp np; - int i; - - if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) - return; - - np = (png_unknown_chunkp)png_malloc(png_ptr, - (info_ptr->unknown_chunks_num + num_unknowns) * - sizeof(png_unknown_chunk)); - - png_memcpy(np, info_ptr->unknown_chunks, - info_ptr->unknown_chunks_num * sizeof(png_unknown_chunk)); - png_free(png_ptr, info_ptr->unknown_chunks); - info_ptr->unknown_chunks=NULL; - - for (i = 0; i < num_unknowns; i++) - { - png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; - png_unknown_chunkp from = unknowns + i; - - png_strcpy((png_charp)to->name, (png_charp)from->name); - to->data = (png_bytep)png_malloc(png_ptr, from->size); - png_memcpy(to->data, from->data, from->size); - to->size = from->size; - - /* note our location in the read or write sequence */ - to->location = (png_byte)(png_ptr->mode & 0xff); - } - - info_ptr->unknown_chunks = np; - info_ptr->unknown_chunks_num += num_unknowns; -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_UNKN; -#endif -} -void PNGAPI -png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, - int chunk, int location) -{ - if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < - (int)info_ptr->unknown_chunks_num) - info_ptr->unknown_chunks[chunk].location = (png_byte)location; -} -#endif - -#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ - defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) -void PNGAPI -png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted) -{ - /* This function is deprecated in favor of png_permit_mng_features() - and will be removed from libpng-2.0.0 */ - png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n"); - if (png_ptr == NULL) - return; - png_ptr->mng_features_permitted = (png_byte) - ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) | - ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE))); -} -#endif - -#if defined(PNG_MNG_FEATURES_SUPPORTED) -png_uint_32 PNGAPI -png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) -{ - png_debug(1, "in png_permit_mng_features\n"); - if (png_ptr == NULL) - return (png_uint_32)0; - png_ptr->mng_features_permitted = - (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); - return (png_uint_32)png_ptr->mng_features_permitted; -} -#endif - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) -void PNGAPI -png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep - chunk_list, int num_chunks) -{ - png_bytep new_list, p; - int i, old_num_chunks; - if (num_chunks == 0) - { - if(keep == HANDLE_CHUNK_ALWAYS || keep == HANDLE_CHUNK_IF_SAFE) - png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; - else - png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; - - if(keep == HANDLE_CHUNK_ALWAYS) - png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; - else - png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; - return; - } - if (chunk_list == NULL) - return; - old_num_chunks=png_ptr->num_chunk_list; - new_list=png_malloc(png_ptr,5*(num_chunks+old_num_chunks)); - if(png_ptr->chunk_list != (png_bytep)NULL) - { - png_memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks); - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->chunk_list=NULL; - } - png_memcpy(new_list+5*old_num_chunks, chunk_list, 5*num_chunks); - for (p=new_list+5*old_num_chunks+4, i=0; inum_chunk_list=old_num_chunks+num_chunks; - png_ptr->chunk_list=new_list; -#ifdef PNG_FREE_ME_SUPPORTED - png_ptr->free_me |= PNG_FREE_LIST; -#endif -} -#endif - -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) -void PNGAPI -png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, - png_user_chunk_ptr read_user_chunk_fn) -{ - png_debug(1, "in png_set_read_user_chunk_fn\n"); - png_ptr->read_user_chunk_fn = read_user_chunk_fn; - png_ptr->user_chunk_ptr = user_chunk_ptr; -} -#endif - -#if defined(PNG_INFO_IMAGE_SUPPORTED) -void PNGAPI -png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) -{ - png_debug1(1, "in %s storage function\n", "rows"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) - png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); - info_ptr->row_pointers = row_pointers; - if(row_pointers) - info_ptr->valid |= PNG_INFO_IDAT; - -} -#endif - -void PNGAPI -png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size) -{ - if(png_ptr->zbuf) - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf_size = (png_size_t)size; - png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); - if(!png_ptr->zbuf) - png_error(png_ptr,"Unable to malloc zbuf"); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; -} - -void PNGAPI -png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) -{ - if (png_ptr && info_ptr) - info_ptr->valid &= ~(mask); -} - diff --git a/libraries/libpng-1.0.9/pngtest.c b/libraries/libpng-1.0.9/pngtest.c deleted file mode 100644 index d3312e1..0000000 --- a/libraries/libpng-1.0.9/pngtest.c +++ /dev/null @@ -1,1461 +0,0 @@ - -/* pngtest.c - a simple test program to test libpng - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This program reads in a PNG image, writes it out again, and then - * compares the two files. If the files are identical, this shows that - * the basic chunk handling, filtering, and (de)compression code is working - * properly. It does not currently test all of the transforms, although - * it probably should. - * - * The program will report "FAIL" in certain legitimate cases: - * 1) when the compression level or filter selection method is changed. - * 2) when the maximum IDAT size (PNG_ZBUF_SIZE in pngconf.h) is not 8192. - * 3) unknown unsafe-to-copy ancillary chunks or unknown critical chunks - * exist in the input file. - * 4) others not listed here... - * In these cases, it is best to check with another tool such as "pngcheck" - * to see what the differences between the two files are. - * - * If a filename is given on the command-line, then this file is used - * for the input, rather than the default "pngtest.png". This allows - * testing a wide variety of files easily. You can also test a number - * of files at once by typing "pngtest -m file1.png file2.png ..." - */ - -#if defined(_WIN32_WCE) -# if _WIN32_WCE < 211 - __error__ (f|w)printf functions are not supported on old WindowsCE.; -# endif -# include -# include -# define READFILE(file, data, length, check) \ - if (ReadFile(file, data, length, &check,NULL)) check = 0 -# define WRITEFILE(file, data, length, check)) \ - if (WriteFile(file, data, length, &check, NULL)) check = 0 -# define FCLOSE(file) CloseHandle(file) -#else -# include -# include -# include -# define READFILE(file, data, length, check) \ - check=(png_size_t)fread(data,(png_size_t)1,length,file) -# define WRITEFILE(file, data, length, check) \ - check=(png_size_t)fwrite(data,(png_size_t)1, length, file) -# define FCLOSE(file) fclose(file) -#endif - -#if defined(PNG_NO_STDIO) -#if defined(_WIN32_WCE) -typedef HANDLE png_FILE_p; -#else -typedef FILE * png_FILE_p; -#endif -#endif - -/* Makes pngtest verbose so we can find problems (needs to be before png.h) */ -#ifndef PNG_DEBUG -#define PNG_DEBUG 0 -#endif - -/* Turn on CPU timing -#define PNGTEST_TIMING -*/ - -#ifdef PNG_NO_FLOATING_POINT_SUPPORTED -#undef PNGTEST_TIMING -#endif - -#ifdef PNGTEST_TIMING -static float t_start, t_stop, t_decode, t_encode, t_misc; -#include -#endif - -#include "png.h" - -/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) png_ptr->jmpbuf -#endif - -#ifdef PNGTEST_TIMING -static float t_start, t_stop, t_decode, t_encode, t_misc; -#if !defined(PNG_tIME_SUPPORTED) -#include -#endif -#endif - -#if defined(PNG_TIME_RFC1123_SUPPORTED) -static int tIME_chunk_present=0; -static char tIME_string[30] = "no tIME chunk present in file"; -#endif - -static int verbose = 0; - -int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname)); - -#ifdef __TURBOC__ -#include -#endif - -/* defined so I can write to a file on gui/windowing platforms */ -/* #define STDERR stderr */ -#define STDERR stdout /* for DOS */ - -/* example of using row callbacks to make a simple progress meter */ -static int status_pass=1; -static int status_dots_requested=0; -static int status_dots=1; - -void -read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass); -void -read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) -{ - if(png_ptr == NULL || row_number > PNG_MAX_UINT) return; - if(status_pass != pass) - { - fprintf(stdout,"\n Pass %d: ",pass); - status_pass = pass; - status_dots = 31; - } - status_dots--; - if(status_dots == 0) - { - fprintf(stdout, "\n "); - status_dots=30; - } - fprintf(stdout, "r"); -} - -void -write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass); -void -write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) -{ - if(png_ptr == NULL || row_number > PNG_MAX_UINT || pass > 7) return; - fprintf(stdout, "w"); -} - - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) -/* Example of using user transform callback (we don't transform anything, - but merely examine the row filters. We set this to 256 rather than - 5 in case illegal filter values are present.) */ -static png_uint_32 filters_used[256]; -void -count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data); -void -count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data) -{ - if(png_ptr != NULL && row_info != NULL) - ++filters_used[*(data-1)]; -} -#endif - -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) -/* example of using user transform callback (we don't transform anything, - but merely count the zero samples) */ - -static png_uint_32 zero_samples; - -void -count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data); -void -count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data) -{ - png_bytep dp = data; - if(png_ptr == NULL)return; - - /* contents of row_info: - * png_uint_32 width width of row - * png_uint_32 rowbytes number of bytes in row - * png_byte color_type color type of pixels - * png_byte bit_depth bit depth of samples - * png_byte channels number of channels (1-4) - * png_byte pixel_depth bits per pixel (depth*channels) - */ - - - /* counts the number of zero samples (or zero pixels if color_type is 3 */ - - if(row_info->color_type == 0 || row_info->color_type == 3) - { - int pos=0; - png_uint_32 n, nstop; - for (n=0, nstop=row_info->width; nbit_depth == 1) - { - if(((*dp << pos++ ) & 0x80) == 0) zero_samples++; - if(pos == 8) - { - pos = 0; - dp++; - } - } - if(row_info->bit_depth == 2) - { - if(((*dp << (pos+=2)) & 0xc0) == 0) zero_samples++; - if(pos == 8) - { - pos = 0; - dp++; - } - } - if(row_info->bit_depth == 4) - { - if(((*dp << (pos+=4)) & 0xf0) == 0) zero_samples++; - if(pos == 8) - { - pos = 0; - dp++; - } - } - if(row_info->bit_depth == 8) - if(*dp++ == 0) zero_samples++; - if(row_info->bit_depth == 16) - { - if((*dp | *(dp+1)) == 0) zero_samples++; - dp+=2; - } - } - } - else /* other color types */ - { - png_uint_32 n, nstop; - int channel; - int color_channels = row_info->channels; - if(row_info->color_type > 3)color_channels--; - - for (n=0, nstop=row_info->width; nbit_depth == 8) - if(*dp++ == 0) zero_samples++; - if(row_info->bit_depth == 16) - { - if((*dp | *(dp+1)) == 0) zero_samples++; - dp+=2; - } - } - if(row_info->color_type > 3) - { - dp++; - if(row_info->bit_depth == 16)dp++; - } - } - } -} -#endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */ - -static int wrote_question = 0; - -#if defined(PNG_NO_STDIO) -/* START of code to validate stdio-free compilation */ -/* These copies of the default read/write functions come from pngrio.c and */ -/* pngwio.c. They allow "don't include stdio" testing of the library. */ -/* This is the function that does the actual reading of data. If you are - not reading from a standard C stream, you should create a replacement - read_data function and use it at run time with png_set_read_fn(), rather - than changing the library. */ - -#ifndef USE_FAR_KEYWORD -static void -pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_size_t check; - - /* fread() returns 0 on error, so it is OK to store this in a png_size_t - * instead of an int, which is what fread() actually returns. - */ - READFILE((png_FILE_p)png_ptr->io_ptr, data, length, check); - - if (check != length) - { - png_error(png_ptr, "Read Error"); - } -} -#else -/* this is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void -pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - int check; - png_byte *n_data; - png_FILE_p io_ptr; - - /* Check if data really is near. If so, use usual code. */ - n_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); - if ((png_bytep)n_data == data) - { - READFILE(io_ptr, n_data, length, check); - } - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t read, remaining, err; - check = 0; - remaining = length; - do - { - read = MIN(NEAR_BUF_SIZE, remaining); - READFILE(io_ptr, buf, 1, err); - png_memcpy(data, buf, read); /* copy far buffer to near buffer */ - if(err != read) - break; - else - check += err; - data += read; - remaining -= read; - } - while (remaining != 0); - } - if (check != length) - { - png_error(png_ptr, "read Error"); - } -} -#endif /* USE_FAR_KEYWORD */ - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -static void -pngtest_flush(png_structp png_ptr) -{ -#if !defined(_WIN32_WCE) - png_FILE_p io_ptr; - io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr)); - if (io_ptr != NULL) - fflush(io_ptr); -#endif -} -#endif - -/* This is the function that does the actual writing of data. If you are - not writing to a standard C stream, you should create a replacement - write_data function and use it at run time with png_set_write_fn(), rather - than changing the library. */ -#ifndef USE_FAR_KEYWORD -static void -pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_uint_32 check; - - WRITEFILE((png_FILE_p)png_ptr->io_ptr, data, length, check); - if (check != length) - { - png_error(png_ptr, "Write Error"); - } -} -#else -/* this is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void -pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_uint_32 check; - png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */ - png_FILE_p io_ptr; - - /* Check if data really is near. If so, use usual code. */ - near_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); - if ((png_bytep)near_data == data) - { - WRITEFILE(io_ptr, near_data, length, check); - } - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t written, remaining, err; - check = 0; - remaining = length; - do - { - written = MIN(NEAR_BUF_SIZE, remaining); - png_memcpy(buf, data, written); /* copy far buffer to near buffer */ - WRITEFILE(io_ptr, buf, written, err); - if (err != written) - break; - else - check += err; - data += written; - remaining -= written; - } - while (remaining != 0); - } - if (check != length) - { - png_error(png_ptr, "Write Error"); - } -} - -#endif /* USE_FAR_KEYWORD */ - -/* This function is called when there is a warning, but the library thinks - * it can continue anyway. Replacement functions don't have to do anything - * here if you don't want to. In the default configuration, png_ptr is - * not used, but it is passed in case it may be useful. - */ -static void -pngtest_warning(png_structp png_ptr, png_const_charp message) -{ - PNG_CONST char *name = "UNKNOWN (ERROR!)"; - if (png_ptr != NULL && png_ptr->error_ptr != NULL) - name = png_ptr->error_ptr; - fprintf(STDERR, "%s: libpng warning: %s\n", name, message); -} - -/* This is the default error handling function. Note that replacements for - * this function MUST NOT RETURN, or the program will likely crash. This - * function is used by default, or if the program supplies NULL for the - * error function pointer in png_set_error_fn(). - */ -static void -pngtest_error(png_structp png_ptr, png_const_charp message) -{ - pngtest_warning(png_ptr, message); - /* We can return because png_error calls the default handler, which is - * actually OK in this case. */ -} -#endif /* PNG_NO_STDIO */ -/* END of code to validate stdio-free compilation */ - -/* START of code to validate memory allocation and deallocation */ -#ifdef PNG_USER_MEM_SUPPORTED - -/* Allocate memory. For reasonable files, size should never exceed - 64K. However, zlib may allocate more then 64K if you don't tell - it not to. See zconf.h and png.h for more information. zlib does - need to allocate exactly 64K, so whatever you call here must - have the ability to do that. - - This piece of code can be compiled to validate max 64K allocations - by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K. */ -typedef struct memory_information -{ - png_uint_32 size; - png_voidp pointer; - struct memory_information FAR *next; -} memory_information; -typedef memory_information FAR *memory_infop; - -static memory_infop pinformation = NULL; -static int current_allocation = 0; -static int maximum_allocation = 0; -static int total_allocation = 0; -static int num_allocations = 0; - -extern PNG_EXPORT(png_voidp,png_debug_malloc) PNGARG((png_structp png_ptr, - png_uint_32 size)); -extern PNG_EXPORT(void,png_debug_free) PNGARG((png_structp png_ptr, - png_voidp ptr)); - -png_voidp -png_debug_malloc(png_structp png_ptr, png_uint_32 size) -{ - - /* png_malloc has already tested for NULL; png_create_struct calls - png_debug_malloc directly, with png_ptr == NULL which is OK */ - - if (size == 0) - return (png_voidp)(NULL); - - /* This calls the library allocator twice, once to get the requested - buffer and once to get a new free list entry. */ - { - memory_infop pinfo = png_malloc_default(png_ptr, sizeof *pinfo); - pinfo->size = size; - current_allocation += size; - total_allocation += size; - num_allocations ++; - if (current_allocation > maximum_allocation) - maximum_allocation = current_allocation; - pinfo->pointer = png_malloc_default(png_ptr, size); - pinfo->next = pinformation; - pinformation = pinfo; - /* Make sure the caller isn't assuming zeroed memory. */ - png_memset(pinfo->pointer, 0xdd, pinfo->size); -#if PNG_DEBUG - if(verbose) - printf("png_malloc %d bytes at %x\n",size,pinfo->pointer); -#endif - assert(pinfo->size != 12345678); - return (png_voidp)(pinfo->pointer); - } -} - -/* Free a pointer. It is removed from the list at the same time. */ -void -png_debug_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL) - fprintf(STDERR, "NULL pointer to png_debug_free.\n"); - if (ptr == 0) - { -#if 0 /* This happens all the time. */ - fprintf(STDERR, "WARNING: freeing NULL pointer\n"); -#endif - return; - } - - /* Unlink the element from the list. */ - { - memory_infop FAR *ppinfo = &pinformation; - for (;;) - { - memory_infop pinfo = *ppinfo; - if (pinfo->pointer == ptr) - { - *ppinfo = pinfo->next; - current_allocation -= pinfo->size; - if (current_allocation < 0) - fprintf(STDERR, "Duplicate free of memory\n"); - /* We must free the list element too, but first kill - the memory that is to be freed. */ - memset(ptr, 0x55, pinfo->size); - png_free_default(png_ptr, pinfo); - pinfo=NULL; - break; - } - if (pinfo->next == NULL) - { - fprintf(STDERR, "Pointer %x not found\n", ptr); - break; - } - ppinfo = &pinfo->next; - } - } - - /* Finally free the data. */ -#if PNG_DEBUG - if(verbose) - printf("Freeing %x\n",ptr); -#endif - png_free_default(png_ptr, ptr); - ptr=NULL; -} -#endif /* PNG_USER_MEM_SUPPORTED */ -/* END of code to test memory allocation/deallocation */ - -/* Test one file */ -int -test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) -{ - static png_FILE_p fpin; - static png_FILE_p fpout; /* "static" prevents setjmp corruption */ - png_structp read_ptr, write_ptr; - png_infop read_info_ptr, write_info_ptr, end_info_ptr, write_end_info_ptr; - png_bytep row_buf; - png_uint_32 y; - png_uint_32 width, height; - int num_pass, pass; - int bit_depth, color_type; -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf jmpbuf; -#endif -#endif - -#if defined(_WIN32_WCE) - TCHAR path[MAX_PATH]; -#endif - char inbuf[256], outbuf[256]; - - row_buf = (png_bytep)NULL; - -#if defined(_WIN32_WCE) - MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH); - if ((fpin = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE) -#else - if ((fpin = fopen(inname, "rb")) == NULL) -#endif - { - fprintf(STDERR, "Could not find input file %s\n", inname); - return (1); - } - -#if defined(_WIN32_WCE) - MultiByteToWideChar(CP_ACP, 0, outname, -1, path, MAX_PATH); - if ((fpout = CreateFile(path, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL)) == INVALID_HANDLE_VALUE) -#else - if ((fpout = fopen(outname, "wb")) == NULL) -#endif - { - fprintf(STDERR, "Could not open output file %s\n", outname); - FCLOSE(fpin); - return (1); - } - - png_debug(0, "Allocating read and write structures\n"); -#ifdef PNG_USER_MEM_SUPPORTED - read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, - (png_error_ptr)NULL, (png_error_ptr)NULL, (png_voidp)NULL, - (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free); -#else - read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, - (png_error_ptr)NULL, (png_error_ptr)NULL); -#endif -#if defined(PNG_NO_STDIO) - png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error, - pngtest_warning); -#endif -#ifdef PNG_USER_MEM_SUPPORTED - write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, - (png_error_ptr)NULL, (png_error_ptr)NULL, (png_voidp)NULL, - (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free); -#else - write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, - (png_error_ptr)NULL, (png_error_ptr)NULL); -#endif -#if defined(PNG_NO_STDIO) - png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error, - pngtest_warning); -#endif - png_debug(0, "Allocating read_info, write_info and end_info structures\n"); - read_info_ptr = png_create_info_struct(read_ptr); - write_info_ptr = png_create_info_struct(write_ptr); - end_info_ptr = png_create_info_struct(read_ptr); - write_end_info_ptr = png_create_info_struct(write_ptr); -#ifdef PNG_USER_MEM_SUPPORTED -#endif - -#ifdef PNG_SETJMP_SUPPORTED - png_debug(0, "Setting jmpbuf for read struct\n"); -#ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) -#else - if (setjmp(png_jmpbuf(read_ptr))) -#endif - { - fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname); - png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); - png_destroy_info_struct(write_ptr, &write_end_info_ptr); - png_destroy_write_struct(&write_ptr, &write_info_ptr); - FCLOSE(fpin); - FCLOSE(fpout); - return (1); - } -#ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(read_ptr),jmpbuf,sizeof(jmp_buf)); -#endif - - png_debug(0, "Setting jmpbuf for write struct\n"); -#ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) -#else - if (setjmp(png_jmpbuf(write_ptr))) -#endif - { - fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname); - png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); - png_destroy_info_struct(write_ptr, &write_end_info_ptr); - png_destroy_write_struct(&write_ptr, &write_info_ptr); - FCLOSE(fpin); - FCLOSE(fpout); - return (1); - } -#ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(write_ptr),jmpbuf,sizeof(jmp_buf)); -#endif -#endif - - png_debug(0, "Initializing input and output streams\n"); -#if !defined(PNG_NO_STDIO) - png_init_io(read_ptr, fpin); - png_init_io(write_ptr, fpout); -#else - png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data); - png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data, -#if defined(PNG_WRITE_FLUSH_SUPPORTED) - pngtest_flush); -#else - NULL); -#endif -#endif - if(status_dots_requested == 1) - { - png_set_write_status_fn(write_ptr, write_row_callback); - png_set_read_status_fn(read_ptr, read_row_callback); - } - else - { - png_set_write_status_fn(write_ptr, NULL); - png_set_read_status_fn(read_ptr, NULL); - } - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - { - int i; - for(i=0; i<256; i++) - filters_used[i]=0; - png_set_read_user_transform_fn(read_ptr, count_filters); - } -#endif -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) - zero_samples=0; - png_set_write_user_transform_fn(write_ptr, count_zero_samples); -#endif - -#define HANDLE_CHUNK_IF_SAFE 2 -#define HANDLE_CHUNK_ALWAYS 3 -#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) - png_set_keep_unknown_chunks(read_ptr, HANDLE_CHUNK_ALWAYS, NULL, 0); -#endif -#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) - png_set_keep_unknown_chunks(write_ptr, HANDLE_CHUNK_IF_SAFE, NULL, 0); -#endif - - png_debug(0, "Reading info struct\n"); - png_read_info(read_ptr, read_info_ptr); - - png_debug(0, "Transferring info struct\n"); - { - int interlace_type, compression_type, filter_type; - - if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth, - &color_type, &interlace_type, &compression_type, &filter_type)) - { - png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth, -#if defined(PNG_WRITE_INTERLACING_SUPPORTED) - color_type, interlace_type, compression_type, filter_type); -#else - color_type, PNG_INTERLACE_NONE, compression_type, filter_type); -#endif - } - } -#if defined(PNG_FIXED_POINT_SUPPORTED) -#if defined(PNG_cHRM_SUPPORTED) - { - png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x, - blue_y; - if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y, &red_x, - &red_y, &green_x, &green_y, &blue_x, &blue_y)) - { - png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x, - red_y, green_x, green_y, blue_x, blue_y); - } - } -#endif -#if defined(PNG_gAMA_SUPPORTED) - { - png_fixed_point gamma; - - if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma)) - { - png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma); - } - } -#endif -#else /* Use floating point versions */ -#if defined(PNG_FLOATING_POINT_SUPPORTED) -#if defined(PNG_cHRM_SUPPORTED) - { - double white_x, white_y, red_x, red_y, green_x, green_y, blue_x, - blue_y; - if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x, - &red_y, &green_x, &green_y, &blue_x, &blue_y)) - { - png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x, - red_y, green_x, green_y, blue_x, blue_y); - } - } -#endif -#if defined(PNG_gAMA_SUPPORTED) - { - double gamma; - - if (png_get_gAMA(read_ptr, read_info_ptr, &gamma)) - { - png_set_gAMA(write_ptr, write_info_ptr, gamma); - } - } -#endif -#endif /* floating point */ -#endif /* fixed point */ -#if defined(PNG_iCCP_SUPPORTED) - { - png_charp name; - png_charp profile; - png_uint_32 proflen; - int compression_type; - - if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type, - &profile, &proflen)) - { - png_set_iCCP(write_ptr, write_info_ptr, name, compression_type, - profile, proflen); - } - } -#endif -#if defined(PNG_sRGB_SUPPORTED) - { - int intent; - - if (png_get_sRGB(read_ptr, read_info_ptr, &intent)) - { - png_set_sRGB(write_ptr, write_info_ptr, intent); - } - } -#endif - { - png_colorp palette; - int num_palette; - - if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette)) - { - png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette); - } - } -#if defined(PNG_bKGD_SUPPORTED) - { - png_color_16p background; - - if (png_get_bKGD(read_ptr, read_info_ptr, &background)) - { - png_set_bKGD(write_ptr, write_info_ptr, background); - } - } -#endif -#if defined(PNG_hIST_SUPPORTED) - { - png_uint_16p hist; - - if (png_get_hIST(read_ptr, read_info_ptr, &hist)) - { - png_set_hIST(write_ptr, write_info_ptr, hist); - } - } -#endif -#if defined(PNG_oFFs_SUPPORTED) - { - png_int_32 offset_x, offset_y; - int unit_type; - - if (png_get_oFFs(read_ptr, read_info_ptr,&offset_x,&offset_y,&unit_type)) - { - png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type); - } - } -#endif -#if defined(PNG_pCAL_SUPPORTED) - { - png_charp purpose, units; - png_charpp params; - png_int_32 X0, X1; - int type, nparams; - - if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type, - &nparams, &units, ¶ms)) - { - png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type, - nparams, units, params); - } - } -#endif -#if defined(PNG_pHYs_SUPPORTED) - { - png_uint_32 res_x, res_y; - int unit_type; - - if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type)) - { - png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type); - } - } -#endif -#if defined(PNG_sBIT_SUPPORTED) - { - png_color_8p sig_bit; - - if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit)) - { - png_set_sBIT(write_ptr, write_info_ptr, sig_bit); - } - } -#endif -#if defined(PNG_sCAL_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED - { - int unit; - double scal_width, scal_height; - - if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width, - &scal_height)) - { - png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height); - } - } -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - { - int unit; - png_charp scal_width, scal_height; - - if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width, - &scal_height)) - { - png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width, scal_height); - } - } -#endif -#endif -#endif -#if defined(PNG_TEXT_SUPPORTED) - { - png_textp text_ptr; - int num_text; - - if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0) - { - png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks\n", num_text); - png_set_text(write_ptr, write_info_ptr, text_ptr, num_text); - } - } -#endif -#if defined(PNG_tIME_SUPPORTED) - { - png_timep mod_time; - - if (png_get_tIME(read_ptr, read_info_ptr, &mod_time)) - { - png_set_tIME(write_ptr, write_info_ptr, mod_time); -#if defined(PNG_TIME_RFC1123_SUPPORTED) - /* we have to use png_strcpy instead of "=" because the string - pointed to by png_convert_to_rfc1123() gets free'ed before - we use it */ - png_strcpy(tIME_string,png_convert_to_rfc1123(read_ptr, mod_time)); - tIME_chunk_present++; -#endif /* PNG_TIME_RFC1123_SUPPORTED */ - } - } -#endif -#if defined(PNG_tRNS_SUPPORTED) - { - png_bytep trans; - int num_trans; - png_color_16p trans_values; - - if (png_get_tRNS(read_ptr, read_info_ptr, &trans, &num_trans, - &trans_values)) - { - png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans, - trans_values); - } - } -#endif -#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) - { - png_unknown_chunkp unknowns; - int num_unknowns = (int)png_get_unknown_chunks(read_ptr, read_info_ptr, - &unknowns); - if (num_unknowns) - { - png_size_t i; - png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns, - num_unknowns); - /* copy the locations from the read_info_ptr. The automatically - generated locations in write_info_ptr are wrong because we - haven't written anything yet */ - for (i = 0; i < (png_size_t)num_unknowns; i++) - png_set_unknown_chunk_location(write_ptr, write_info_ptr, i, - unknowns[i].location); - } - } -#endif - - png_debug(0, "\nWriting info struct\n"); - -/* If we wanted, we could write info in two steps: - png_write_info_before_PLTE(write_ptr, write_info_ptr); - */ - png_write_info(write_ptr, write_info_ptr); - - png_debug(0, "\nAllocating row buffer \n"); - row_buf = (png_bytep)png_malloc(read_ptr, - png_get_rowbytes(read_ptr, read_info_ptr)); - if (row_buf == NULL) - { - fprintf(STDERR, "No memory to allocate row buffer\n"); - png_destroy_read_struct(&read_ptr, &read_info_ptr, (png_infopp)NULL); - png_destroy_info_struct(write_ptr, &write_end_info_ptr); - png_destroy_write_struct(&write_ptr, &write_info_ptr); - FCLOSE(fpin); - FCLOSE(fpout); - return (1); - } - png_debug(0, "Writing row data\n"); - -#if defined(PNG_READ_INTERLACING_SUPPORTED) || \ - defined(PNG_WRITE_INTERLACING_SUPPORTED) - num_pass = png_set_interlace_handling(read_ptr); - png_set_interlace_handling(write_ptr); -#else - num_pass=1; -#endif - -#ifdef PNGTEST_TIMING - t_stop = (float)clock(); - t_misc += (t_stop - t_start); - t_start = t_stop; -#endif - for (pass = 0; pass < num_pass; pass++) - { - png_debug1(0, "Writing row data for pass %d\n",pass); - for (y = 0; y < height; y++) - { - png_read_rows(read_ptr, (png_bytepp)&row_buf, (png_bytepp)NULL, 1); -#ifdef PNGTEST_TIMING - t_stop = (float)clock(); - t_decode += (t_stop - t_start); - t_start = t_stop; -#endif - png_write_rows(write_ptr, (png_bytepp)&row_buf, 1); -#ifdef PNGTEST_TIMING - t_stop = (float)clock(); - t_encode += (t_stop - t_start); - t_start = t_stop; -#endif - } - } - -#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) - png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1); -#endif -#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) - png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1); -#endif - - png_debug(0, "Reading and writing end_info data\n"); - - png_read_end(read_ptr, end_info_ptr); -#if defined(PNG_TEXT_SUPPORTED) - { - png_textp text_ptr; - int num_text; - - if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0) - { - png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks\n", num_text); - png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text); - } - } -#endif -#if defined(PNG_tIME_SUPPORTED) - { - png_timep mod_time; - - if (png_get_tIME(read_ptr, end_info_ptr, &mod_time)) - { - png_set_tIME(write_ptr, write_end_info_ptr, mod_time); -#if defined(PNG_TIME_RFC1123_SUPPORTED) - /* we have to use png_strcpy instead of "=" because the string - pointed to by png_convert_to_rfc1123() gets free'ed before - we use it */ - png_strcpy(tIME_string,png_convert_to_rfc1123(read_ptr, mod_time)); - tIME_chunk_present++; -#endif /* PNG_TIME_RFC1123_SUPPORTED */ - } - } -#endif -#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) - { - png_unknown_chunkp unknowns; - int num_unknowns; - num_unknowns = (int)png_get_unknown_chunks(read_ptr, end_info_ptr, - &unknowns); - if (num_unknowns) - { - png_size_t i; - png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns, - num_unknowns); - /* copy the locations from the read_info_ptr. The automatically - generated locations in write_end_info_ptr are wrong because we - haven't written the end_info yet */ - for (i = 0; i < (png_size_t)num_unknowns; i++) - png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i, - unknowns[i].location); - } - } -#endif - png_write_end(write_ptr, write_end_info_ptr); - -#ifdef PNG_EASY_ACCESS_SUPPORTED - if(verbose) - { - png_uint_32 iwidth, iheight; - iwidth = png_get_image_width(write_ptr, write_info_ptr); - iheight = png_get_image_height(write_ptr, write_info_ptr); - fprintf(STDERR, "Image width = %lu, height = %lu\n", - iwidth, iheight); - } -#endif - - png_debug(0, "Destroying data structs\n"); - png_free(read_ptr, row_buf); - row_buf=NULL; - png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); - png_destroy_info_struct(write_ptr, &write_end_info_ptr); - png_destroy_write_struct(&write_ptr, &write_info_ptr); - - FCLOSE(fpin); - FCLOSE(fpout); - - png_debug(0, "Opening files for comparison\n"); -#if defined(_WIN32_WCE) - MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH); - if ((fpin = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE) -#else - if ((fpin = fopen(inname, "rb")) == NULL) -#endif - { - fprintf(STDERR, "Could not find file %s\n", inname); - return (1); - } - -#if defined(_WIN32_WCE) - MultiByteToWideChar(CP_ACP, 0, outname, -1, path, MAX_PATH); - if ((fpout = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE) -#else - if ((fpout = fopen(outname, "rb")) == NULL) -#endif - { - fprintf(STDERR, "Could not find file %s\n", outname); - FCLOSE(fpin); - return (1); - } - - for(;;) - { - png_size_t num_in, num_out; - - READFILE(fpin, inbuf, 1, num_in); - READFILE(fpout, outbuf, 1, num_out); - - if (num_in != num_out) - { - fprintf(STDERR, "\nFiles %s and %s are of a different size\n", - inname, outname); - if(wrote_question == 0) - { - fprintf(STDERR, - " Was %s written with the same maximum IDAT chunk size (%d bytes),", - inname,PNG_ZBUF_SIZE); - fprintf(STDERR, - "\n filtering heuristic (libpng default), compression"); - fprintf(STDERR, - " level (zlib default),\n and zlib version (%s)?\n\n", - ZLIB_VERSION); - wrote_question=1; - } - FCLOSE(fpin); - FCLOSE(fpout); - return (0); - } - - if (!num_in) - break; - - if (png_memcmp(inbuf, outbuf, num_in)) - { - fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname); - if(wrote_question == 0) - { - fprintf(STDERR, - " Was %s written with the same maximum IDAT chunk size (%d bytes),", - inname,PNG_ZBUF_SIZE); - fprintf(STDERR, - "\n filtering heuristic (libpng default), compression"); - fprintf(STDERR, - " level (zlib default),\n and zlib version (%s)?\n\n", - ZLIB_VERSION); - wrote_question=1; - } - FCLOSE(fpin); - FCLOSE(fpout); - return (0); - } - } - - FCLOSE(fpin); - FCLOSE(fpout); - - return (0); -} - -/* input and output filenames */ -#ifdef RISCOS -static PNG_CONST char *inname = "pngtest/png"; -static PNG_CONST char *outname = "pngout/png"; -#else -static PNG_CONST char *inname = "pngtest.png"; -static PNG_CONST char *outname = "pngout.png"; -#endif - -int -main(int argc, char *argv[]) -{ - int multiple = 0; - int ierror = 0; - - fprintf(STDERR, "Testing libpng version %s\n", PNG_LIBPNG_VER_STRING); - fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION); - fprintf(STDERR,"%s",png_get_copyright(NULL)); - /* Show the version of libpng used in building the library */ - fprintf(STDERR," library (%lu):%s", png_access_version_number(), - png_get_header_version(NULL)); - /* Show the version of libpng used in building the application */ - fprintf(STDERR," pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER, - PNG_HEADER_VERSION_STRING); - fprintf(STDERR," sizeof(png_struct)=%d, sizeof(png_info)=%d\n", - sizeof(png_struct), sizeof(png_info)); - - /* Do some consistency checking on the memory allocation settings, I'm - not sure this matters, but it is nice to know, the first of these - tests should be impossible because of the way the macros are set - in pngconf.h */ -#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) - fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n"); -#endif - /* I think the following can happen. */ -#if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K) - fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n"); -#endif - - if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING)) - { - fprintf(STDERR, - "Warning: versions are different between png.h and png.c\n"); - fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING); - fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver); - ++ierror; - } - - if (argc > 1) - { - if (strcmp(argv[1], "-m") == 0) - { - multiple = 1; - status_dots_requested = 0; - } - else if (strcmp(argv[1], "-mv") == 0 || - strcmp(argv[1], "-vm") == 0 ) - { - multiple = 1; - verbose = 1; - status_dots_requested = 1; - } - else if (strcmp(argv[1], "-v") == 0) - { - verbose = 1; - status_dots_requested = 1; - inname = argv[2]; - } - else - { - inname = argv[1]; - status_dots_requested = 0; - } - } - - if (!multiple && argc == 3+verbose) - outname = argv[2+verbose]; - - if ((!multiple && argc > 3+verbose) || (multiple && argc < 2)) - { - fprintf(STDERR, - "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n", - argv[0], argv[0]); - fprintf(STDERR, - " reads/writes one PNG file (without -m) or multiple files (-m)\n"); - fprintf(STDERR, - " with -m %s is used as a temporary file\n", outname); - exit(1); - } - - if (multiple) - { - int i; -#ifdef PNG_USER_MEM_SUPPORTED - int allocation_now = current_allocation; -#endif - for (i=2; isize, pinfo->pointer); - pinfo = pinfo->next; - } - } -#endif - } -#ifdef PNG_USER_MEM_SUPPORTED - fprintf(STDERR, " Current memory allocation: %10d bytes\n", - current_allocation); - fprintf(STDERR, " Maximum memory allocation: %10d bytes\n", - maximum_allocation); - fprintf(STDERR, " Total memory allocation: %10d bytes\n", - total_allocation); - fprintf(STDERR, " Number of allocations: %10d\n", - num_allocations); -#endif - } - else - { - int i; - for (i=0; i<3; ++i) - { - int kerror; -#ifdef PNG_USER_MEM_SUPPORTED - int allocation_now = current_allocation; -#endif - if (i == 1) status_dots_requested = 1; - else if(verbose == 0)status_dots_requested = 0; - if (i == 0 || verbose == 1 || ierror != 0) - fprintf(STDERR, "Testing %s:",inname); - kerror = test_one_file(inname, outname); - if(kerror == 0) - { - if(verbose == 1 || i == 2) - { -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - int k; -#endif -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) - fprintf(STDERR, "\n PASS (%lu zero samples)\n",zero_samples); -#else - fprintf(STDERR, " PASS\n"); -#endif -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - for (k=0; k<256; k++) - if(filters_used[k]) - fprintf(STDERR, " Filter %d was used %lu times\n", - k,filters_used[k]); -#endif -#if defined(PNG_TIME_RFC1123_SUPPORTED) - if(tIME_chunk_present != 0) - fprintf(STDERR, " tIME = %s\n",tIME_string); -#endif /* PNG_TIME_RFC1123_SUPPORTED */ - } - } - else - { - if(verbose == 0 && i != 2) - fprintf(STDERR, "Testing %s:",inname); - fprintf(STDERR, " FAIL\n"); - ierror += kerror; - } -#ifdef PNG_USER_MEM_SUPPORTED - if (allocation_now != current_allocation) - fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n", - current_allocation-allocation_now); - if (current_allocation != 0) - { - memory_infop pinfo = pinformation; - - fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n", - current_allocation); - while (pinfo != NULL) - { - fprintf(STDERR," %d bytes at %x\n", - pinfo->size, pinfo->pointer); - pinfo = pinfo->next; - } - } -#endif - } -#ifdef PNG_USER_MEM_SUPPORTED - fprintf(STDERR, " Current memory allocation: %10d bytes\n", - current_allocation); - fprintf(STDERR, " Maximum memory allocation: %10d bytes\n", - maximum_allocation); - fprintf(STDERR, " Total memory allocation: %10d bytes\n", - total_allocation); - fprintf(STDERR, " Number of allocations: %10d\n", - num_allocations); -#endif - } - -#ifdef PNGTEST_TIMING - t_stop = (float)clock(); - t_misc += (t_stop - t_start); - t_start = t_stop; - fprintf(STDERR," CPU time used = %.3f seconds", - (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC); - fprintf(STDERR," (decoding %.3f,\n", - t_decode/(float)CLOCKS_PER_SEC); - fprintf(STDERR," encoding %.3f ,", - t_encode/(float)CLOCKS_PER_SEC); - fprintf(STDERR," other %.3f seconds)\n\n", - t_misc/(float)CLOCKS_PER_SEC); -#endif - - if (ierror == 0) - fprintf(STDERR, "libpng passes test\n"); - else - fprintf(STDERR, "libpng FAILS test\n"); - return (int)(ierror != 0); -} - -/* Generate a compiler error if there is an old png.h in the search path. */ -typedef version_1_0_9 your_png_h_is_not_version_1_0_9; diff --git a/libraries/libpng-1.0.9/pngtest.png b/libraries/libpng-1.0.9/pngtest.png deleted file mode 100644 index 3d6f1c3..0000000 Binary files a/libraries/libpng-1.0.9/pngtest.png and /dev/null differ diff --git a/libraries/libpng-1.0.9/pngtrans.c b/libraries/libpng-1.0.9/pngtrans.c deleted file mode 100644 index 001a3ee..0000000 --- a/libraries/libpng-1.0.9/pngtrans.c +++ /dev/null @@ -1,609 +0,0 @@ - -/* pngtrans.c - transforms the data in a row (used by both readers and writers) - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - */ - -#define PNG_INTERNAL -#include "png.h" - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -/* turn on BGR-to-RGB mapping */ -void PNGAPI -png_set_bgr(png_structp png_ptr) -{ - png_debug(1, "in png_set_bgr\n"); - png_ptr->transformations |= PNG_BGR; -} -#endif - -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -/* turn on 16 bit byte swapping */ -void PNGAPI -png_set_swap(png_structp png_ptr) -{ - png_debug(1, "in png_set_swap\n"); - if (png_ptr->bit_depth == 16) - png_ptr->transformations |= PNG_SWAP_BYTES; -} -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) -/* turn on pixel packing */ -void PNGAPI -png_set_packing(png_structp png_ptr) -{ - png_debug(1, "in png_set_packing\n"); - if (png_ptr->bit_depth < 8) - { - png_ptr->transformations |= PNG_PACK; - png_ptr->usr_bit_depth = 8; - } -} -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED) -/* turn on packed pixel swapping */ -void PNGAPI -png_set_packswap(png_structp png_ptr) -{ - png_debug(1, "in png_set_packswap\n"); - if (png_ptr->bit_depth < 8) - png_ptr->transformations |= PNG_PACKSWAP; -} -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) -void PNGAPI -png_set_shift(png_structp png_ptr, png_color_8p true_bits) -{ - png_debug(1, "in png_set_shift\n"); - png_ptr->transformations |= PNG_SHIFT; - png_ptr->shift = *true_bits; -} -#endif - -#if defined(PNG_READ_INTERLACING_SUPPORTED) || \ - defined(PNG_WRITE_INTERLACING_SUPPORTED) -int PNGAPI -png_set_interlace_handling(png_structp png_ptr) -{ - png_debug(1, "in png_set_interlace handling\n"); - if (png_ptr->interlaced) - { - png_ptr->transformations |= PNG_INTERLACE; - return (7); - } - - return (1); -} -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) -/* Add a filler byte on read, or remove a filler or alpha byte on write. - * The filler type has changed in v0.95 to allow future 2-byte fillers - * for 48-bit input data, as well as to avoid problems with some compilers - * that don't like bytes as parameters. - */ -void PNGAPI -png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc) -{ - png_debug(1, "in png_set_filler\n"); - png_ptr->transformations |= PNG_FILLER; - png_ptr->filler = (png_byte)filler; - if (filler_loc == PNG_FILLER_AFTER) - png_ptr->flags |= PNG_FLAG_FILLER_AFTER; - else - png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER; - - /* This should probably go in the "do_filler" routine. - * I attempted to do that in libpng-1.0.1a but that caused problems - * so I restored it in libpng-1.0.2a - */ - - if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - png_ptr->usr_channels = 4; - } - - /* Also I added this in libpng-1.0.2a (what happens when we expand - * a less-than-8-bit grayscale to GA? */ - - if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8) - { - png_ptr->usr_channels = 2; - } -} -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -void PNGAPI -png_set_swap_alpha(png_structp png_ptr) -{ - png_debug(1, "in png_set_swap_alpha\n"); - png_ptr->transformations |= PNG_SWAP_ALPHA; -} -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -void PNGAPI -png_set_invert_alpha(png_structp png_ptr) -{ - png_debug(1, "in png_set_invert_alpha\n"); - png_ptr->transformations |= PNG_INVERT_ALPHA; -} -#endif - -#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -void PNGAPI -png_set_invert_mono(png_structp png_ptr) -{ - png_debug(1, "in png_set_invert_mono\n"); - png_ptr->transformations |= PNG_INVERT_MONO; -} - -/* invert monochrome grayscale data */ -void /* PRIVATE */ -png_do_invert(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_invert\n"); - if (row_info->bit_depth == 1 && -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->color_type == PNG_COLOR_TYPE_GRAY) - { - png_bytep rp = row; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(~(*rp)); - rp++; - } - } -} -#endif - -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -/* swaps byte order on 16 bit depth images */ -void /* PRIVATE */ -png_do_swap(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_swap\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->bit_depth == 16) - { - png_bytep rp = row; - png_uint_32 i; - png_uint_32 istop= row_info->width * row_info->channels; - - for (i = 0; i < istop; i++, rp += 2) - { - png_byte t = *rp; - *rp = *(rp + 1); - *(rp + 1) = t; - } - } -} -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED) -static png_byte onebppswaptable[256] = { - 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, - 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0, - 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, - 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, - 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, - 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4, - 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, - 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, - 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, - 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2, - 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, - 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, - 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, - 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6, - 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, - 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, - 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, - 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1, - 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, - 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9, - 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, - 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, - 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, - 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD, - 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, - 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, - 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, - 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB, - 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, - 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, - 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, - 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF -}; - -static png_byte twobppswaptable[256] = { - 0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0, - 0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0, - 0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4, - 0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4, - 0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8, - 0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8, - 0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC, - 0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC, - 0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1, - 0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1, - 0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5, - 0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5, - 0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9, - 0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9, - 0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD, - 0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD, - 0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2, - 0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2, - 0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6, - 0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6, - 0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA, - 0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA, - 0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE, - 0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE, - 0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3, - 0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3, - 0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7, - 0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7, - 0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB, - 0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB, - 0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF, - 0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF -}; - -static png_byte fourbppswaptable[256] = { - 0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70, - 0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0, - 0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71, - 0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1, - 0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72, - 0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2, - 0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73, - 0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3, - 0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74, - 0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4, - 0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75, - 0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5, - 0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76, - 0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6, - 0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77, - 0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7, - 0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78, - 0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8, - 0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79, - 0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9, - 0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A, - 0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA, - 0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B, - 0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB, - 0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C, - 0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC, - 0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D, - 0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD, - 0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E, - 0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE, - 0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F, - 0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF -}; - -/* swaps pixel packing order within bytes */ -void /* PRIVATE */ -png_do_packswap(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_packswap\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->bit_depth < 8) - { - png_bytep rp, end, table; - - end = row + row_info->rowbytes; - - if (row_info->bit_depth == 1) - table = onebppswaptable; - else if (row_info->bit_depth == 2) - table = twobppswaptable; - else if (row_info->bit_depth == 4) - table = fourbppswaptable; - else - return; - - for (rp = row; rp < end; rp++) - *rp = table[*rp]; - } -} -#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */ - -#if defined(PNG_WRITE_FILLER_SUPPORTED) || \ - defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -/* remove filler or alpha byte(s) */ -void /* PRIVATE */ -png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags) -{ - png_debug(1, "in png_do_strip_filler\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { -/* - if (row_info->color_type == PNG_COLOR_TYPE_RGB || - row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) -*/ - png_bytep sp=row; - png_bytep dp=row; - png_uint_32 row_width=row_info->width; - png_uint_32 i; - - if (row_info->channels == 4) - { - if (row_info->bit_depth == 8) - { - /* This converts from RGBX or RGBA to RGB */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - dp+=3; sp+=4; - for (i = 1; i < row_width; i++) - { - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - sp++; - } - } - /* This converts from XRGB or ARGB to RGB */ - else - { - for (i = 0; i < row_width; i++) - { - sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 24; - row_info->rowbytes = row_width * 3; - } - else /* if (row_info->bit_depth == 16) */ - { - if (flags & PNG_FLAG_FILLER_AFTER) - { - /* This converts from RRGGBBXX or RRGGBBAA to RRGGBB */ - sp += 8; dp += 6; - for (i = 1; i < row_width; i++) - { - /* This could be (although memcpy is probably slower): - png_memcpy(dp, sp, 6); - sp += 8; - dp += 6; - */ - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - sp += 2; - } - } - else - { - /* This converts from XXRRGGBB or AARRGGBB to RRGGBB */ - for (i = 0; i < row_width; i++) - { - /* This could be (although memcpy is probably slower): - png_memcpy(dp, sp, 6); - sp += 8; - dp += 6; - */ - sp+=2; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 48; - row_info->rowbytes = row_width * 6; - } - row_info->channels = 3; - row_info->color_type &= ~PNG_COLOR_MASK_ALPHA; - } -/* - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY || - row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) -*/ - else if (row_info->channels == 2) - { - if (row_info->bit_depth == 8) - { - /* This converts from GX or GA to G */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - for (i = 0; i < row_width; i++) - { - *dp++ = *sp++; - sp++; - } - } - /* This converts from XG or AG to G */ - else - { - for (i = 0; i < row_width; i++) - { - sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 8; - row_info->rowbytes = row_width; - } - else /* if (row_info->bit_depth == 16) */ - { - if (flags & PNG_FLAG_FILLER_AFTER) - { - /* This converts from GGXX or GGAA to GG */ - sp += 4; dp += 2; - for (i = 1; i < row_width; i++) - { - *dp++ = *sp++; - *dp++ = *sp++; - sp += 2; - } - } - else - { - /* This converts from XXGG or AAGG to GG */ - for (i = 0; i < row_width; i++) - { - sp += 2; - *dp++ = *sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 16; - row_info->rowbytes = row_width * 2; - } - row_info->channels = 1; - row_info->color_type &= ~PNG_COLOR_MASK_ALPHA; - } - } -} -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -/* swaps red and blue bytes within a pixel */ -void /* PRIVATE */ -png_do_bgr(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_bgr\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - (row_info->color_type & PNG_COLOR_MASK_COLOR)) - { - png_uint_32 row_width = row_info->width; - if (row_info->bit_depth == 8) - { - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - { - png_bytep rp; - png_uint_32 i; - - for (i = 0, rp = row; i < row_width; i++, rp += 3) - { - png_byte save = *rp; - *rp = *(rp + 2); - *(rp + 2) = save; - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - png_bytep rp; - png_uint_32 i; - - for (i = 0, rp = row; i < row_width; i++, rp += 4) - { - png_byte save = *rp; - *rp = *(rp + 2); - *(rp + 2) = save; - } - } - } - else if (row_info->bit_depth == 16) - { - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - { - png_bytep rp; - png_uint_32 i; - - for (i = 0, rp = row; i < row_width; i++, rp += 6) - { - png_byte save = *rp; - *rp = *(rp + 4); - *(rp + 4) = save; - save = *(rp + 1); - *(rp + 1) = *(rp + 5); - *(rp + 5) = save; - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - png_bytep rp; - png_uint_32 i; - - for (i = 0, rp = row; i < row_width; i++, rp += 8) - { - png_byte save = *rp; - *rp = *(rp + 4); - *(rp + 4) = save; - save = *(rp + 1); - *(rp + 1) = *(rp + 5); - *(rp + 5) = save; - } - } - } - } -} -#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */ - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_LEGACY_SUPPORTED) -void PNGAPI -png_set_user_transform_info(png_structp png_ptr, png_voidp - user_transform_ptr, int user_transform_depth, int user_transform_channels) -{ - png_debug(1, "in png_set_user_transform_info\n"); -#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) - png_ptr->user_transform_ptr = user_transform_ptr; - png_ptr->user_transform_depth = (png_byte)user_transform_depth; - png_ptr->user_transform_channels = (png_byte)user_transform_channels; -#else - if(user_transform_ptr || user_transform_depth || user_transform_channels) - png_warning(png_ptr, - "This version of libpng does not support user transform info"); -#endif -} -#endif - -/* This function returns a pointer to the user_transform_ptr associated with - * the user transform functions. The application should free any memory - * associated with this pointer before png_write_destroy and png_read_destroy - * are called. - */ -png_voidp PNGAPI -png_get_user_transform_ptr(png_structp png_ptr) -{ -#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) - return ((png_voidp)png_ptr->user_transform_ptr); -#else - if(png_ptr) - return (NULL); - return (NULL); -#endif -} - diff --git a/libraries/libpng-1.0.9/pngvcrd.c b/libraries/libpng-1.0.9/pngvcrd.c deleted file mode 100644 index b3e9332..0000000 --- a/libraries/libpng-1.0.9/pngvcrd.c +++ /dev/null @@ -1,3824 +0,0 @@ -/* pngvcrd.c - mixed C/assembler version of utilities to read a PNG file - * - * For Intel x86 CPU and Microsoft Visual C++ compiler - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * Copyright (c) 1998, Intel Corporation - * - * Contributed by Nirav Chhatrapati, Intel Corporation, 1998 - * Interface to libpng contributed by Gilles Vollant, 1999 - * Debugging and cleanup by Greg Roelofs, 2000, 2001 - * - * In png_do_read_interlace() in libpng versions 1.0.3a through 1.0.4d, - * a sign error in the post-MMX cleanup code for each pixel_depth resulted - * in bad pixels at the beginning of some rows of some images, and also - * (due to out-of-range memory reads and writes) caused heap corruption - * when compiled with MSVC 6.0. The error was fixed in version 1.0.4e. - * - * [png_read_filter_row_mmx_avg() bpp == 2 bugfix, GRR 20000916] - * - */ - -#define PNG_INTERNAL -#include "png.h" - -#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD) - -static int mmx_supported=2; - - -int PNGAPI -png_mmx_support(void) -{ - int mmx_supported_local = 0; - _asm { - push ebx //CPUID will trash these - push ecx - push edx - pushfd //Save Eflag to stack - pop eax //Get Eflag from stack into eax - mov ecx, eax //Make another copy of Eflag in ecx - xor eax, 0x200000 //Toggle ID bit in Eflag [i.e. bit(21)] - push eax //Save modified Eflag back to stack - - popfd //Restored modified value back to Eflag reg - pushfd //Save Eflag to stack - pop eax //Get Eflag from stack - xor eax, ecx //Compare the new Eflag with the original Eflag - jz NOT_SUPPORTED //If the same, CPUID instruction is not supported, - //skip following instructions and jump to - //NOT_SUPPORTED label - - xor eax, eax //Set eax to zero - - _asm _emit 0x0f //CPUID instruction (two bytes opcode) - _asm _emit 0xa2 - - cmp eax, 1 //make sure eax return non-zero value - jl NOT_SUPPORTED //If eax is zero, mmx not supported - - xor eax, eax //set eax to zero - inc eax //Now increment eax to 1. This instruction is - //faster than the instruction "mov eax, 1" - - _asm _emit 0x0f //CPUID instruction - _asm _emit 0xa2 - - and edx, 0x00800000 //mask out all bits but mmx bit(24) - cmp edx, 0 // 0 = mmx not supported - jz NOT_SUPPORTED // non-zero = Yes, mmx IS supported - - mov mmx_supported_local, 1 //set return value to 1 - -NOT_SUPPORTED: - mov eax, mmx_supported_local //move return value to eax - pop edx //CPUID trashed these - pop ecx - pop ebx - } - - //mmx_supported_local=0; // test code for force don't support MMX - //printf("MMX : %u (1=MMX supported)\n",mmx_supported_local); - - mmx_supported = mmx_supported_local; - return mmx_supported_local; -} - -/* Combines the row recently read in with the previous row. - This routine takes care of alpha and transparency if requested. - This routine also handles the two methods of progressive display - of interlaced images, depending on the mask value. - The mask value describes which pixels are to be combined with - the row. The pattern always repeats every 8 pixels, so just 8 - bits are needed. A one indicates the pixel is to be combined; a - zero indicates the pixel is to be skipped. This is in addition - to any alpha or transparency value associated with the pixel. If - you want all pixels to be combined, pass 0xff (255) in mask. */ - -/* Use this routine for x86 platform - uses faster MMX routine if machine - supports MMX */ - -void /* PRIVATE */ -png_combine_row(png_structp png_ptr, png_bytep row, int mask) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; -#endif - - png_debug(1,"in png_combine_row_asm\n"); - - if (mmx_supported == 2) { - png_mmx_support(); - } - - if (mask == 0xff) - { - png_memcpy(row, png_ptr->row_buf + 1, - (png_size_t)((png_ptr->width * png_ptr->row_info.pixel_depth + 7) >> 3)); - } - /* GRR: add "else if (mask == 0)" case? - * or does png_combine_row() not even get called in that case? */ - else - { - switch (png_ptr->row_info.pixel_depth) - { - case 1: - { - png_bytep sp; - png_bytep dp; - int s_inc, s_start, s_end; - int m; - int shift; - png_uint_32 i; - - sp = png_ptr->row_buf + 1; - dp = row; - m = 0x80; -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 7; - s_inc = 1; - } - else -#endif - { - s_start = 7; - s_end = 0; - s_inc = -1; - } - - shift = s_start; - - for (i = 0; i < png_ptr->width; i++) - { - if (m & mask) - { - int value; - - value = (*sp >> shift) & 0x1; - *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - - case 2: - { - png_bytep sp; - png_bytep dp; - int s_start, s_end, s_inc; - int m; - int shift; - png_uint_32 i; - int value; - - sp = png_ptr->row_buf + 1; - dp = row; - m = 0x80; -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 6; - s_inc = 2; - } - else -#endif - { - s_start = 6; - s_end = 0; - s_inc = -2; - } - - shift = s_start; - - for (i = 0; i < png_ptr->width; i++) - { - if (m & mask) - { - value = (*sp >> shift) & 0x3; - *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - - case 4: - { - png_bytep sp; - png_bytep dp; - int s_start, s_end, s_inc; - int m; - int shift; - png_uint_32 i; - int value; - - sp = png_ptr->row_buf + 1; - dp = row; - m = 0x80; -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 4; - s_inc = 4; - } - else -#endif - { - s_start = 4; - s_end = 0; - s_inc = -4; - } - shift = s_start; - - for (i = 0; i < png_ptr->width; i++) - { - if (m & mask) - { - value = (*sp >> shift) & 0xf; - *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - - case 8: - { - png_bytep srcptr; - png_bytep dstptr; - png_uint_32 len; - int m; - int diff, unmask; - - __int64 mask0=0x0102040810204080; - - if ( mmx_supported ) - { - srcptr = png_ptr->row_buf + 1; - dstptr = row; - m = 0x80; - unmask = ~mask; - len = png_ptr->width &~7; //reduce to multiple of 8 - diff = png_ptr->width & 7; //amount lost - - _asm - { - movd mm7, unmask //load bit pattern - psubb mm6,mm6 //zero mm6 - punpcklbw mm7,mm7 - punpcklwd mm7,mm7 - punpckldq mm7,mm7 //fill register with 8 masks - - movq mm0,mask0 - - pand mm0,mm7 //nonzero if keep byte - pcmpeqb mm0,mm6 //zeros->1s, v versa - - mov ecx,len //load length of line (pixels) - mov esi,srcptr //load source - mov ebx,dstptr //load dest - cmp ecx,0 //lcr - je mainloop8end - -mainloop8: - movq mm4,[esi] - pand mm4,mm0 - movq mm6,mm0 - pandn mm6,[ebx] - por mm4,mm6 - movq [ebx],mm4 - - add esi,8 //inc by 8 bytes processed - add ebx,8 - sub ecx,8 //dec by 8 pixels processed - - ja mainloop8 -mainloop8end: - - mov ecx,diff - cmp ecx,0 - jz end8 - - mov edx,mask - sal edx,24 //make low byte the high byte - -secondloop8: - sal edx,1 //move high bit to CF - jnc skip8 //if CF = 0 - mov al,[esi] - mov [ebx],al -skip8: - inc esi - inc ebx - - dec ecx - jnz secondloop8 -end8: - emms - } - } - else /* mmx not supported - use modified C routine */ - { - register unsigned int incr1, initial_val, final_val; - png_size_t pixel_bytes; - png_uint_32 i; - register int disp = png_pass_inc[png_ptr->pass]; - int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; - - pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); - srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* - pixel_bytes; - dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; - initial_val = offset_table[png_ptr->pass]*pixel_bytes; - final_val = png_ptr->width*pixel_bytes; - incr1 = (disp)*pixel_bytes; - for (i = initial_val; i < final_val; i += incr1) - { - png_memcpy(dstptr, srcptr, pixel_bytes); - srcptr += incr1; - dstptr += incr1; - } - } /* end of else */ - - break; - } // end 8 bpp - - case 16: - { - png_bytep srcptr; - png_bytep dstptr; - png_uint_32 len; - int unmask, diff; - __int64 mask1=0x0101020204040808, - mask0=0x1010202040408080; - - if ( mmx_supported ) - { - srcptr = png_ptr->row_buf + 1; - dstptr = row; - - unmask = ~mask; - len = (png_ptr->width)&~7; - diff = (png_ptr->width)&7; - _asm - { - movd mm7, unmask //load bit pattern - psubb mm6,mm6 //zero mm6 - punpcklbw mm7,mm7 - punpcklwd mm7,mm7 - punpckldq mm7,mm7 //fill register with 8 masks - - movq mm0,mask0 - movq mm1,mask1 - - pand mm0,mm7 - pand mm1,mm7 - - pcmpeqb mm0,mm6 - pcmpeqb mm1,mm6 - - mov ecx,len //load length of line - mov esi,srcptr //load source - mov ebx,dstptr //load dest - cmp ecx,0 //lcr - jz mainloop16end - -mainloop16: - movq mm4,[esi] - pand mm4,mm0 - movq mm6,mm0 - movq mm7,[ebx] - pandn mm6,mm7 - por mm4,mm6 - movq [ebx],mm4 - - movq mm5,[esi+8] - pand mm5,mm1 - movq mm7,mm1 - movq mm6,[ebx+8] - pandn mm7,mm6 - por mm5,mm7 - movq [ebx+8],mm5 - - add esi,16 //inc by 16 bytes processed - add ebx,16 - sub ecx,8 //dec by 8 pixels processed - - ja mainloop16 - -mainloop16end: - mov ecx,diff - cmp ecx,0 - jz end16 - - mov edx,mask - sal edx,24 //make low byte the high byte -secondloop16: - sal edx,1 //move high bit to CF - jnc skip16 //if CF = 0 - mov ax,[esi] - mov [ebx],ax -skip16: - add esi,2 - add ebx,2 - - dec ecx - jnz secondloop16 -end16: - emms - } - } - else /* mmx not supported - use modified C routine */ - { - register unsigned int incr1, initial_val, final_val; - png_size_t pixel_bytes; - png_uint_32 i; - register int disp = png_pass_inc[png_ptr->pass]; - int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; - - pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); - srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* - pixel_bytes; - dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; - initial_val = offset_table[png_ptr->pass]*pixel_bytes; - final_val = png_ptr->width*pixel_bytes; - incr1 = (disp)*pixel_bytes; - for (i = initial_val; i < final_val; i += incr1) - { - png_memcpy(dstptr, srcptr, pixel_bytes); - srcptr += incr1; - dstptr += incr1; - } - } /* end of else */ - - break; - } // end 16 bpp - - case 24: - { - png_bytep srcptr; - png_bytep dstptr; - png_uint_32 len; - int unmask, diff; - - __int64 mask2=0x0101010202020404, //24bpp - mask1=0x0408080810101020, - mask0=0x2020404040808080; - - srcptr = png_ptr->row_buf + 1; - dstptr = row; - - unmask = ~mask; - len = (png_ptr->width)&~7; - diff = (png_ptr->width)&7; - - if ( mmx_supported ) - { - _asm - { - movd mm7, unmask //load bit pattern - psubb mm6,mm6 //zero mm6 - punpcklbw mm7,mm7 - punpcklwd mm7,mm7 - punpckldq mm7,mm7 //fill register with 8 masks - - movq mm0,mask0 - movq mm1,mask1 - movq mm2,mask2 - - pand mm0,mm7 - pand mm1,mm7 - pand mm2,mm7 - - pcmpeqb mm0,mm6 - pcmpeqb mm1,mm6 - pcmpeqb mm2,mm6 - - mov ecx,len //load length of line - mov esi,srcptr //load source - mov ebx,dstptr //load dest - cmp ecx,0 - jz mainloop24end - -mainloop24: - movq mm4,[esi] - pand mm4,mm0 - movq mm6,mm0 - movq mm7,[ebx] - pandn mm6,mm7 - por mm4,mm6 - movq [ebx],mm4 - - - movq mm5,[esi+8] - pand mm5,mm1 - movq mm7,mm1 - movq mm6,[ebx+8] - pandn mm7,mm6 - por mm5,mm7 - movq [ebx+8],mm5 - - movq mm6,[esi+16] - pand mm6,mm2 - movq mm4,mm2 - movq mm7,[ebx+16] - pandn mm4,mm7 - por mm6,mm4 - movq [ebx+16],mm6 - - add esi,24 //inc by 24 bytes processed - add ebx,24 - sub ecx,8 //dec by 8 pixels processed - - ja mainloop24 - -mainloop24end: - mov ecx,diff - cmp ecx,0 - jz end24 - - mov edx,mask - sal edx,24 //make low byte the high byte -secondloop24: - sal edx,1 //move high bit to CF - jnc skip24 //if CF = 0 - mov ax,[esi] - mov [ebx],ax - xor eax,eax - mov al,[esi+2] - mov [ebx+2],al -skip24: - add esi,3 - add ebx,3 - - dec ecx - jnz secondloop24 - -end24: - emms - } - } - else /* mmx not supported - use modified C routine */ - { - register unsigned int incr1, initial_val, final_val; - png_size_t pixel_bytes; - png_uint_32 i; - register int disp = png_pass_inc[png_ptr->pass]; - int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; - - pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); - srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* - pixel_bytes; - dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; - initial_val = offset_table[png_ptr->pass]*pixel_bytes; - final_val = png_ptr->width*pixel_bytes; - incr1 = (disp)*pixel_bytes; - for (i = initial_val; i < final_val; i += incr1) - { - png_memcpy(dstptr, srcptr, pixel_bytes); - srcptr += incr1; - dstptr += incr1; - } - } /* end of else */ - - break; - } // end 24 bpp - - case 32: - { - png_bytep srcptr; - png_bytep dstptr; - png_uint_32 len; - int unmask, diff; - - __int64 mask3=0x0101010102020202, //32bpp - mask2=0x0404040408080808, - mask1=0x1010101020202020, - mask0=0x4040404080808080; - - srcptr = png_ptr->row_buf + 1; - dstptr = row; - - unmask = ~mask; - len = (png_ptr->width)&~7; - diff = (png_ptr->width)&7; - - if ( mmx_supported ) - { - _asm - { - movd mm7, unmask //load bit pattern - psubb mm6,mm6 //zero mm6 - punpcklbw mm7,mm7 - punpcklwd mm7,mm7 - punpckldq mm7,mm7 //fill register with 8 masks - - movq mm0,mask0 - movq mm1,mask1 - movq mm2,mask2 - movq mm3,mask3 - - pand mm0,mm7 - pand mm1,mm7 - pand mm2,mm7 - pand mm3,mm7 - - pcmpeqb mm0,mm6 - pcmpeqb mm1,mm6 - pcmpeqb mm2,mm6 - pcmpeqb mm3,mm6 - - mov ecx,len //load length of line - mov esi,srcptr //load source - mov ebx,dstptr //load dest - - cmp ecx,0 //lcr - jz mainloop32end - -mainloop32: - movq mm4,[esi] - pand mm4,mm0 - movq mm6,mm0 - movq mm7,[ebx] - pandn mm6,mm7 - por mm4,mm6 - movq [ebx],mm4 - - movq mm5,[esi+8] - pand mm5,mm1 - movq mm7,mm1 - movq mm6,[ebx+8] - pandn mm7,mm6 - por mm5,mm7 - movq [ebx+8],mm5 - - movq mm6,[esi+16] - pand mm6,mm2 - movq mm4,mm2 - movq mm7,[ebx+16] - pandn mm4,mm7 - por mm6,mm4 - movq [ebx+16],mm6 - - movq mm7,[esi+24] - pand mm7,mm3 - movq mm5,mm3 - movq mm4,[ebx+24] - pandn mm5,mm4 - por mm7,mm5 - movq [ebx+24],mm7 - - add esi,32 //inc by 32 bytes processed - add ebx,32 - sub ecx,8 //dec by 8 pixels processed - - ja mainloop32 - -mainloop32end: - mov ecx,diff - cmp ecx,0 - jz end32 - - mov edx,mask - sal edx,24 //make low byte the high byte -secondloop32: - sal edx,1 //move high bit to CF - jnc skip32 //if CF = 0 - mov eax,[esi] - mov [ebx],eax -skip32: - add esi,4 - add ebx,4 - - dec ecx - jnz secondloop32 - -end32: - emms - } - } - else /* mmx _not supported - Use modified C routine */ - { - register unsigned int incr1, initial_val, final_val; - png_size_t pixel_bytes; - png_uint_32 i; - register int disp = png_pass_inc[png_ptr->pass]; - int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; - - pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); - srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* - pixel_bytes; - dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; - initial_val = offset_table[png_ptr->pass]*pixel_bytes; - final_val = png_ptr->width*pixel_bytes; - incr1 = (disp)*pixel_bytes; - for (i = initial_val; i < final_val; i += incr1) - { - png_memcpy(dstptr, srcptr, pixel_bytes); - srcptr += incr1; - dstptr += incr1; - } - } /* end of else */ - - break; - } // end 32 bpp - - case 48: - { - png_bytep srcptr; - png_bytep dstptr; - png_uint_32 len; - int unmask, diff; - - __int64 mask5=0x0101010101010202, - mask4=0x0202020204040404, - mask3=0x0404080808080808, - mask2=0x1010101010102020, - mask1=0x2020202040404040, - mask0=0x4040808080808080; - - if ( mmx_supported ) - { - srcptr = png_ptr->row_buf + 1; - dstptr = row; - - unmask = ~mask; - len = (png_ptr->width)&~7; - diff = (png_ptr->width)&7; - _asm - { - movd mm7, unmask //load bit pattern - psubb mm6,mm6 //zero mm6 - punpcklbw mm7,mm7 - punpcklwd mm7,mm7 - punpckldq mm7,mm7 //fill register with 8 masks - - movq mm0,mask0 - movq mm1,mask1 - movq mm2,mask2 - movq mm3,mask3 - movq mm4,mask4 - movq mm5,mask5 - - pand mm0,mm7 - pand mm1,mm7 - pand mm2,mm7 - pand mm3,mm7 - pand mm4,mm7 - pand mm5,mm7 - - pcmpeqb mm0,mm6 - pcmpeqb mm1,mm6 - pcmpeqb mm2,mm6 - pcmpeqb mm3,mm6 - pcmpeqb mm4,mm6 - pcmpeqb mm5,mm6 - - mov ecx,len //load length of line - mov esi,srcptr //load source - mov ebx,dstptr //load dest - - cmp ecx,0 - jz mainloop48end - -mainloop48: - movq mm7,[esi] - pand mm7,mm0 - movq mm6,mm0 - pandn mm6,[ebx] - por mm7,mm6 - movq [ebx],mm7 - - movq mm6,[esi+8] - pand mm6,mm1 - movq mm7,mm1 - pandn mm7,[ebx+8] - por mm6,mm7 - movq [ebx+8],mm6 - - movq mm6,[esi+16] - pand mm6,mm2 - movq mm7,mm2 - pandn mm7,[ebx+16] - por mm6,mm7 - movq [ebx+16],mm6 - - movq mm7,[esi+24] - pand mm7,mm3 - movq mm6,mm3 - pandn mm6,[ebx+24] - por mm7,mm6 - movq [ebx+24],mm7 - - movq mm6,[esi+32] - pand mm6,mm4 - movq mm7,mm4 - pandn mm7,[ebx+32] - por mm6,mm7 - movq [ebx+32],mm6 - - movq mm7,[esi+40] - pand mm7,mm5 - movq mm6,mm5 - pandn mm6,[ebx+40] - por mm7,mm6 - movq [ebx+40],mm7 - - add esi,48 //inc by 32 bytes processed - add ebx,48 - sub ecx,8 //dec by 8 pixels processed - - ja mainloop48 -mainloop48end: - - mov ecx,diff - cmp ecx,0 - jz end48 - - mov edx,mask - sal edx,24 //make low byte the high byte - -secondloop48: - sal edx,1 //move high bit to CF - jnc skip48 //if CF = 0 - mov eax,[esi] - mov [ebx],eax -skip48: - add esi,4 - add ebx,4 - - dec ecx - jnz secondloop48 - -end48: - emms - } - } - else /* mmx _not supported - Use modified C routine */ - { - register unsigned int incr1, initial_val, final_val; - png_size_t pixel_bytes; - png_uint_32 i; - register int disp = png_pass_inc[png_ptr->pass]; - int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; - - pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); - srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* - pixel_bytes; - dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; - initial_val = offset_table[png_ptr->pass]*pixel_bytes; - final_val = png_ptr->width*pixel_bytes; - incr1 = (disp)*pixel_bytes; - for (i = initial_val; i < final_val; i += incr1) - { - png_memcpy(dstptr, srcptr, pixel_bytes); - srcptr += incr1; - dstptr += incr1; - } - } /* end of else */ - - break; - } // end 48 bpp - - default: - { - png_bytep sptr; - png_bytep dp; - png_size_t pixel_bytes; - int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; - unsigned int i; - register int disp = png_pass_inc[png_ptr->pass]; // get the offset - register unsigned int incr1, initial_val, final_val; - - pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); - sptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* - pixel_bytes; - dp = row + offset_table[png_ptr->pass]*pixel_bytes; - initial_val = offset_table[png_ptr->pass]*pixel_bytes; - final_val = png_ptr->width*pixel_bytes; - incr1 = (disp)*pixel_bytes; - for (i = initial_val; i < final_val; i += incr1) - { - png_memcpy(dp, sptr, pixel_bytes); - sptr += incr1; - dp += incr1; - } - break; - } - } /* end switch (png_ptr->row_info.pixel_depth) */ - } /* end if (non-trivial mask) */ - -} /* end png_combine_row() */ - - -#if defined(PNG_READ_INTERLACING_SUPPORTED) - -void /* PRIVATE */ -png_do_read_interlace(png_structp png_ptr) -{ - png_row_infop row_info = &(png_ptr->row_info); - png_bytep row = png_ptr->row_buf + 1; - int pass = png_ptr->pass; - png_uint_32 transformations = png_ptr->transformations; -#ifdef PNG_USE_LOCAL_ARRAYS - const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; -#endif - - png_debug(1,"in png_do_read_interlace\n"); - - if (mmx_supported == 2) { - png_mmx_support(); - } - - if (row != NULL && row_info != NULL) - { - png_uint_32 final_width; - - final_width = row_info->width * png_pass_inc[pass]; - - switch (row_info->pixel_depth) - { - case 1: - { - png_bytep sp, dp; - int sshift, dshift; - int s_start, s_end, s_inc; - png_byte v; - png_uint_32 i; - int j; - - sp = row + (png_size_t)((row_info->width - 1) >> 3); - dp = row + (png_size_t)((final_width - 1) >> 3); -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (int)((row_info->width + 7) & 7); - dshift = (int)((final_width + 7) & 7); - s_start = 7; - s_end = 0; - s_inc = -1; - } - else -#endif - { - sshift = 7 - (int)((row_info->width + 7) & 7); - dshift = 7 - (int)((final_width + 7) & 7); - s_start = 0; - s_end = 7; - s_inc = 1; - } - - for (i = row_info->width; i; i--) - { - v = (png_byte)((*sp >> sshift) & 0x1); - for (j = 0; j < png_pass_inc[pass]; j++) - { - *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - - case 2: - { - png_bytep sp, dp; - int sshift, dshift; - int s_start, s_end, s_inc; - png_uint_32 i; - - sp = row + (png_size_t)((row_info->width - 1) >> 2); - dp = row + (png_size_t)((final_width - 1) >> 2); -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (png_size_t)(((row_info->width + 3) & 3) << 1); - dshift = (png_size_t)(((final_width + 3) & 3) << 1); - s_start = 6; - s_end = 0; - s_inc = -2; - } - else -#endif - { - sshift = (png_size_t)((3 - ((row_info->width + 3) & 3)) << 1); - dshift = (png_size_t)((3 - ((final_width + 3) & 3)) << 1); - s_start = 0; - s_end = 6; - s_inc = 2; - } - - for (i = row_info->width; i; i--) - { - png_byte v; - int j; - - v = (png_byte)((*sp >> sshift) & 0x3); - for (j = 0; j < png_pass_inc[pass]; j++) - { - *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - - case 4: - { - png_bytep sp, dp; - int sshift, dshift; - int s_start, s_end, s_inc; - png_uint_32 i; - - sp = row + (png_size_t)((row_info->width - 1) >> 1); - dp = row + (png_size_t)((final_width - 1) >> 1); -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (png_size_t)(((row_info->width + 1) & 1) << 2); - dshift = (png_size_t)(((final_width + 1) & 1) << 2); - s_start = 4; - s_end = 0; - s_inc = -4; - } - else -#endif - { - sshift = (png_size_t)((1 - ((row_info->width + 1) & 1)) << 2); - dshift = (png_size_t)((1 - ((final_width + 1) & 1)) << 2); - s_start = 0; - s_end = 4; - s_inc = 4; - } - - for (i = row_info->width; i; i--) - { - png_byte v; - int j; - - v = (png_byte)((*sp >> sshift) & 0xf); - for (j = 0; j < png_pass_inc[pass]; j++) - { - *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - - default: // This is the place where the routine is modified - { - __int64 const4 = 0x0000000000FFFFFF; - // __int64 const5 = 0x000000FFFFFF0000; // unused... - __int64 const6 = 0x00000000000000FF; - png_bytep sptr, dp; - png_uint_32 i; - png_size_t pixel_bytes; - int width = row_info->width; - - pixel_bytes = (row_info->pixel_depth >> 3); - - sptr = row + (width - 1) * pixel_bytes; - dp = row + (final_width - 1) * pixel_bytes; - // New code by Nirav Chhatrapati - Intel Corporation - // sign fix by GRR - // NOTE: there is NO MMX code for 48-bit and 64-bit images - - // use MMX routine if machine supports it - if ( mmx_supported ) - { - if (pixel_bytes == 3) - { - if (((pass == 0) || (pass == 1)) && width) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width - sub edi, 21 // (png_pass_inc[pass] - 1)*pixel_bytes -loop_pass0: - movd mm0, [esi] ; X X X X X v2 v1 v0 - pand mm0, const4 ; 0 0 0 0 0 v2 v1 v0 - movq mm1, mm0 ; 0 0 0 0 0 v2 v1 v0 - psllq mm0, 16 ; 0 0 0 v2 v1 v0 0 0 - movq mm2, mm0 ; 0 0 0 v2 v1 v0 0 0 - psllq mm0, 24 ; v2 v1 v0 0 0 0 0 0 - psrlq mm1, 8 ; 0 0 0 0 0 0 v2 v1 - por mm0, mm2 ; v2 v1 v0 v2 v1 v0 0 0 - por mm0, mm1 ; v2 v1 v0 v2 v1 v0 v2 v1 - movq mm3, mm0 ; v2 v1 v0 v2 v1 v0 v2 v1 - psllq mm0, 16 ; v0 v2 v1 v0 v2 v1 0 0 - movq mm4, mm3 ; v2 v1 v0 v2 v1 v0 v2 v1 - punpckhdq mm3, mm0 ; v0 v2 v1 v0 v2 v1 v0 v2 - movq [edi+16] , mm4 - psrlq mm0, 32 ; 0 0 0 0 v0 v2 v1 v0 - movq [edi+8] , mm3 - punpckldq mm0, mm4 ; v1 v0 v2 v1 v0 v2 v1 v0 - sub esi, 3 - movq [edi], mm0 - sub edi, 24 - //sub esi, 3 - dec ecx - jnz loop_pass0 - EMMS - } - } - else if (((pass == 2) || (pass == 3)) && width) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width - sub edi, 9 // (png_pass_inc[pass] - 1)*pixel_bytes -loop_pass2: - movd mm0, [esi] ; X X X X X v2 v1 v0 - pand mm0, const4 ; 0 0 0 0 0 v2 v1 v0 - movq mm1, mm0 ; 0 0 0 0 0 v2 v1 v0 - psllq mm0, 16 ; 0 0 0 v2 v1 v0 0 0 - movq mm2, mm0 ; 0 0 0 v2 v1 v0 0 0 - psllq mm0, 24 ; v2 v1 v0 0 0 0 0 0 - psrlq mm1, 8 ; 0 0 0 0 0 0 v2 v1 - por mm0, mm2 ; v2 v1 v0 v2 v1 v0 0 0 - por mm0, mm1 ; v2 v1 v0 v2 v1 v0 v2 v1 - movq [edi+4], mm0 ; move to memory - psrlq mm0, 16 ; 0 0 v2 v1 v0 v2 v1 v0 - movd [edi], mm0 ; move to memory - sub esi, 3 - sub edi, 12 - dec ecx - jnz loop_pass2 - EMMS - } - } - else if (width) /* && ((pass == 4) || (pass == 5)) */ - { - int width_mmx = ((width >> 1) << 1) - 8; - if (width_mmx < 0) - width_mmx = 0; - width -= width_mmx; // 8 or 9 pix, 24 or 27 bytes - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub esi, 3 - sub edi, 9 -loop_pass4: - movq mm0, [esi] ; X X v2 v1 v0 v5 v4 v3 - movq mm7, mm0 ; X X v2 v1 v0 v5 v4 v3 - movq mm6, mm0 ; X X v2 v1 v0 v5 v4 v3 - psllq mm0, 24 ; v1 v0 v5 v4 v3 0 0 0 - pand mm7, const4 ; 0 0 0 0 0 v5 v4 v3 - psrlq mm6, 24 ; 0 0 0 X X v2 v1 v0 - por mm0, mm7 ; v1 v0 v5 v4 v3 v5 v4 v3 - movq mm5, mm6 ; 0 0 0 X X v2 v1 v0 - psllq mm6, 8 ; 0 0 X X v2 v1 v0 0 - movq [edi], mm0 ; move quad to memory - psrlq mm5, 16 ; 0 0 0 0 0 X X v2 - pand mm5, const6 ; 0 0 0 0 0 0 0 v2 - por mm6, mm5 ; 0 0 X X v2 v1 v0 v2 - movd [edi+8], mm6 ; move double to memory - sub esi, 6 - sub edi, 12 - sub ecx, 2 - jnz loop_pass4 - EMMS - } - } - - sptr -= width_mmx*3; - dp -= width_mmx*6; - for (i = width; i; i--) - { - png_byte v[8]; - int j; - - png_memcpy(v, sptr, 3); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, 3); - dp -= 3; - } - sptr -= 3; - } - } - } /* end of pixel_bytes == 3 */ - - else if (pixel_bytes == 1) - { - if (((pass == 0) || (pass == 1)) && width) - { - int width_mmx = ((width >> 2) << 2); - width -= width_mmx; - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub edi, 31 - sub esi, 3 -loop1_pass0: - movd mm0, [esi] ; X X X X v0 v1 v2 v3 - movq mm1, mm0 ; X X X X v0 v1 v2 v3 - punpcklbw mm0, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 - movq mm2, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 - punpcklwd mm0, mm0 ; v2 v2 v2 v2 v3 v3 v3 v3 - movq mm3, mm0 ; v2 v2 v2 v2 v3 v3 v3 v3 - punpckldq mm0, mm0 ; v3 v3 v3 v3 v3 v3 v3 v3 - punpckhdq mm3, mm3 ; v2 v2 v2 v2 v2 v2 v2 v2 - movq [edi], mm0 ; move to memory v3 - punpckhwd mm2, mm2 ; v0 v0 v0 v0 v1 v1 v1 v1 - movq [edi+8], mm3 ; move to memory v2 - movq mm4, mm2 ; v0 v0 v0 v0 v1 v1 v1 v1 - punpckldq mm2, mm2 ; v1 v1 v1 v1 v1 v1 v1 v1 - punpckhdq mm4, mm4 ; v0 v0 v0 v0 v0 v0 v0 v0 - movq [edi+16], mm2 ; move to memory v1 - movq [edi+24], mm4 ; move to memory v0 - sub esi, 4 - sub edi, 32 - sub ecx, 4 - jnz loop1_pass0 - EMMS - } - } - - sptr -= width_mmx; - dp -= width_mmx*8; - for (i = width; i; i--) - { - int j; - - /* I simplified this part in version 1.0.4e - * here and in several other instances where - * pixel_bytes == 1 -- GR-P - * - * Original code: - * - * png_byte v[8]; - * png_memcpy(v, sptr, pixel_bytes); - * for (j = 0; j < png_pass_inc[pass]; j++) - * { - * png_memcpy(dp, v, pixel_bytes); - * dp -= pixel_bytes; - * } - * sptr -= pixel_bytes; - * - * Replacement code is in the next three lines: - */ - - for (j = 0; j < png_pass_inc[pass]; j++) - *dp-- = *sptr; - sptr--; - } - } - else if (((pass == 2) || (pass == 3)) && width) - { - int width_mmx = ((width >> 2) << 2); - width -= width_mmx; - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub edi, 15 - sub esi, 3 -loop1_pass2: - movd mm0, [esi] ; X X X X v0 v1 v2 v3 - punpcklbw mm0, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 - movq mm1, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 - punpcklwd mm0, mm0 ; v2 v2 v2 v2 v3 v3 v3 v3 - punpckhwd mm1, mm1 ; v0 v0 v0 v0 v1 v1 v1 v1 - movq [edi], mm0 ; move to memory v2 and v3 - sub esi, 4 - movq [edi+8], mm1 ; move to memory v1 and v0 - sub edi, 16 - sub ecx, 4 - jnz loop1_pass2 - EMMS - } - } - - sptr -= width_mmx; - dp -= width_mmx*4; - for (i = width; i; i--) - { - int j; - - for (j = 0; j < png_pass_inc[pass]; j++) - { - *dp-- = *sptr; - } - sptr --; - } - } - else if (width) /* && ((pass == 4) || (pass == 5))) */ - { - int width_mmx = ((width >> 3) << 3); - width -= width_mmx; - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub edi, 15 - sub esi, 7 -loop1_pass4: - movq mm0, [esi] ; v0 v1 v2 v3 v4 v5 v6 v7 - movq mm1, mm0 ; v0 v1 v2 v3 v4 v5 v6 v7 - punpcklbw mm0, mm0 ; v4 v4 v5 v5 v6 v6 v7 v7 - //movq mm1, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 - punpckhbw mm1, mm1 ;v0 v0 v1 v1 v2 v2 v3 v3 - movq [edi+8], mm1 ; move to memory v0 v1 v2 and v3 - sub esi, 8 - movq [edi], mm0 ; move to memory v4 v5 v6 and v7 - //sub esi, 4 - sub edi, 16 - sub ecx, 8 - jnz loop1_pass4 - EMMS - } - } - - sptr -= width_mmx; - dp -= width_mmx*2; - for (i = width; i; i--) - { - int j; - - for (j = 0; j < png_pass_inc[pass]; j++) - { - *dp-- = *sptr; - } - sptr --; - } - } - } /* end of pixel_bytes == 1 */ - - else if (pixel_bytes == 2) - { - if (((pass == 0) || (pass == 1)) && width) - { - int width_mmx = ((width >> 1) << 1); - width -= width_mmx; - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub esi, 2 - sub edi, 30 -loop2_pass0: - movd mm0, [esi] ; X X X X v1 v0 v3 v2 - punpcklwd mm0, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 - movq mm1, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 - punpckldq mm0, mm0 ; v3 v2 v3 v2 v3 v2 v3 v2 - punpckhdq mm1, mm1 ; v1 v0 v1 v0 v1 v0 v1 v0 - movq [edi], mm0 - movq [edi + 8], mm0 - movq [edi + 16], mm1 - movq [edi + 24], mm1 - sub esi, 4 - sub edi, 32 - sub ecx, 2 - jnz loop2_pass0 - EMMS - } - } - - sptr -= (width_mmx*2 - 2); // sign fixed - dp -= (width_mmx*16 - 2); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 2; - png_memcpy(v, sptr, 2); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 2; - png_memcpy(dp, v, 2); - } - } - } - else if (((pass == 2) || (pass == 3)) && width) - { - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub esi, 2 - sub edi, 14 -loop2_pass2: - movd mm0, [esi] ; X X X X v1 v0 v3 v2 - punpcklwd mm0, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 - movq mm1, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 - punpckldq mm0, mm0 ; v3 v2 v3 v2 v3 v2 v3 v2 - punpckhdq mm1, mm1 ; v1 v0 v1 v0 v1 v0 v1 v0 - movq [edi], mm0 - sub esi, 4 - movq [edi + 8], mm1 - //sub esi, 4 - sub edi, 16 - sub ecx, 2 - jnz loop2_pass2 - EMMS - } - } - - sptr -= (width_mmx*2 - 2); // sign fixed - dp -= (width_mmx*8 - 2); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 2; - png_memcpy(v, sptr, 2); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 2; - png_memcpy(dp, v, 2); - } - } - } - else if (width) // pass == 4 or 5 - { - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub esi, 2 - sub edi, 6 -loop2_pass4: - movd mm0, [esi] ; X X X X v1 v0 v3 v2 - punpcklwd mm0, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 - sub esi, 4 - movq [edi], mm0 - sub edi, 8 - sub ecx, 2 - jnz loop2_pass4 - EMMS - } - } - - sptr -= (width_mmx*2 - 2); // sign fixed - dp -= (width_mmx*4 - 2); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 2; - png_memcpy(v, sptr, 2); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 2; - png_memcpy(dp, v, 2); - } - } - } - } /* end of pixel_bytes == 2 */ - - else if (pixel_bytes == 4) - { - if (((pass == 0) || (pass == 1)) && width) - { - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub esi, 4 - sub edi, 60 -loop4_pass0: - movq mm0, [esi] ; v3 v2 v1 v0 v7 v6 v5 v4 - movq mm1, mm0 ; v3 v2 v1 v0 v7 v6 v5 v4 - punpckldq mm0, mm0 ; v7 v6 v5 v4 v7 v6 v5 v4 - punpckhdq mm1, mm1 ; v3 v2 v1 v0 v3 v2 v1 v0 - movq [edi], mm0 - movq [edi + 8], mm0 - movq [edi + 16], mm0 - movq [edi + 24], mm0 - movq [edi+32], mm1 - movq [edi + 40], mm1 - movq [edi+ 48], mm1 - sub esi, 8 - movq [edi + 56], mm1 - sub edi, 64 - sub ecx, 2 - jnz loop4_pass0 - EMMS - } - } - - sptr -= (width_mmx*4 - 4); // sign fixed - dp -= (width_mmx*32 - 4); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 4; - png_memcpy(v, sptr, 4); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 4; - png_memcpy(dp, v, 4); - } - } - } - else if (((pass == 2) || (pass == 3)) && width) - { - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub esi, 4 - sub edi, 28 -loop4_pass2: - movq mm0, [esi] ; v3 v2 v1 v0 v7 v6 v5 v4 - movq mm1, mm0 ; v3 v2 v1 v0 v7 v6 v5 v4 - punpckldq mm0, mm0 ; v7 v6 v5 v4 v7 v6 v5 v4 - punpckhdq mm1, mm1 ; v3 v2 v1 v0 v3 v2 v1 v0 - movq [edi], mm0 - movq [edi + 8], mm0 - movq [edi+16], mm1 - movq [edi + 24], mm1 - sub esi, 8 - sub edi, 32 - sub ecx, 2 - jnz loop4_pass2 - EMMS - } - } - - sptr -= (width_mmx*4 - 4); // sign fixed - dp -= (width_mmx*16 - 4); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 4; - png_memcpy(v, sptr, 4); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 4; - png_memcpy(dp, v, 4); - } - } - } - else if (width) // pass == 4 or 5 - { - int width_mmx = ((width >> 1) << 1) ; - width -= width_mmx; - if (width_mmx) - { - _asm - { - mov esi, sptr - mov edi, dp - mov ecx, width_mmx - sub esi, 4 - sub edi, 12 -loop4_pass4: - movq mm0, [esi] ; v3 v2 v1 v0 v7 v6 v5 v4 - movq mm1, mm0 ; v3 v2 v1 v0 v7 v6 v5 v4 - punpckldq mm0, mm0 ; v7 v6 v5 v4 v7 v6 v5 v4 - punpckhdq mm1, mm1 ; v3 v2 v1 v0 v3 v2 v1 v0 - movq [edi], mm0 - sub esi, 8 - movq [edi + 8], mm1 - sub edi, 16 - sub ecx, 2 - jnz loop4_pass4 - EMMS - } - } - - sptr -= (width_mmx*4 - 4); // sign fixed - dp -= (width_mmx*8 - 4); // sign fixed - for (i = width; i; i--) - { - png_byte v[8]; - int j; - sptr -= 4; - png_memcpy(v, sptr, 4); - for (j = 0; j < png_pass_inc[pass]; j++) - { - dp -= 4; - png_memcpy(dp, v, 4); - } - } - } - - } /* end of pixel_bytes == 4 */ - - else if (pixel_bytes == 6) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, 6); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, 6); - dp -= 6; - } - sptr -= 6; - } - } /* end of pixel_bytes == 6 */ - - else - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, pixel_bytes); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sptr-= pixel_bytes; - } - } - } /* end of mmx_supported */ - - else /* MMX not supported: use modified C code - takes advantage - * of inlining of memcpy for a constant */ - { - if (pixel_bytes == 1) - { - for (i = width; i; i--) - { - int j; - for (j = 0; j < png_pass_inc[pass]; j++) - *dp-- = *sptr; - sptr--; - } - } - else if (pixel_bytes == 3) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, pixel_bytes); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sptr -= pixel_bytes; - } - } - else if (pixel_bytes == 2) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, pixel_bytes); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sptr -= pixel_bytes; - } - } - else if (pixel_bytes == 4) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, pixel_bytes); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sptr -= pixel_bytes; - } - } - else if (pixel_bytes == 6) - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, pixel_bytes); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sptr -= pixel_bytes; - } - } - else - { - for (i = width; i; i--) - { - png_byte v[8]; - int j; - png_memcpy(v, sptr, pixel_bytes); - for (j = 0; j < png_pass_inc[pass]; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sptr -= pixel_bytes; - } - } - - } /* end of MMX not supported */ - break; - } - } /* end switch (row_info->pixel_depth) */ - - row_info->width = final_width; - row_info->rowbytes = ((final_width * - (png_uint_32)row_info->pixel_depth + 7) >> 3); - } - -} - -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - - -// These variables are utilized in the functions below. They are declared -// globally here to ensure alignment on 8-byte boundaries. - -union uAll { - __int64 use; - double align; -} LBCarryMask = {0x0101010101010101}, - HBClearMask = {0x7f7f7f7f7f7f7f7f}, - ActiveMask, ActiveMask2, ActiveMaskEnd, ShiftBpp, ShiftRem; - - -// Optimized code for PNG Average filter decoder -void /* PRIVATE */ -png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row - , png_bytep prev_row) -{ - int bpp; - png_uint_32 FullLength; - png_uint_32 MMXLength; - //png_uint_32 len; - int diff; - - bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel - FullLength = row_info->rowbytes; // # of bytes to filter - _asm { - // Init address pointers and offset - mov edi, row // edi ==> Avg(x) - xor ebx, ebx // ebx ==> x - mov edx, edi - mov esi, prev_row // esi ==> Prior(x) - sub edx, bpp // edx ==> Raw(x-bpp) - - xor eax, eax - // Compute the Raw value for the first bpp bytes - // Raw(x) = Avg(x) + (Prior(x)/2) -davgrlp: - mov al, [esi + ebx] // Load al with Prior(x) - inc ebx - shr al, 1 // divide by 2 - add al, [edi+ebx-1] // Add Avg(x); -1 to offset inc ebx - cmp ebx, bpp - mov [edi+ebx-1], al // Write back Raw(x); - // mov does not affect flags; -1 to offset inc ebx - jb davgrlp - // get # of bytes to alignment - mov diff, edi // take start of row - add diff, ebx // add bpp - add diff, 0xf // add 7 + 8 to incr past alignment boundary - and diff, 0xfffffff8 // mask to alignment boundary - sub diff, edi // subtract from start ==> value ebx at alignment - jz davggo - // fix alignment - // Compute the Raw value for the bytes upto the alignment boundary - // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) - xor ecx, ecx -davglp1: - xor eax, eax - mov cl, [esi + ebx] // load cl with Prior(x) - mov al, [edx + ebx] // load al with Raw(x-bpp) - add ax, cx - inc ebx - shr ax, 1 // divide by 2 - add al, [edi+ebx-1] // Add Avg(x); -1 to offset inc ebx - cmp ebx, diff // Check if at alignment boundary - mov [edi+ebx-1], al // Write back Raw(x); - // mov does not affect flags; -1 to offset inc ebx - jb davglp1 // Repeat until at alignment boundary -davggo: - mov eax, FullLength - mov ecx, eax - sub eax, ebx // subtract alignment fix - and eax, 0x00000007 // calc bytes over mult of 8 - sub ecx, eax // drop over bytes from original length - mov MMXLength, ecx - } // end _asm block - // Now do the math for the rest of the row - switch ( bpp ) - { - case 3: - { - ActiveMask.use = 0x0000000000ffffff; - ShiftBpp.use = 24; // == 3 * 8 - ShiftRem.use = 40; // == 64 - 24 - _asm { - // Re-init address pointers and offset - movq mm7, ActiveMask - mov ebx, diff // ebx ==> x = offset to alignment boundary - movq mm5, LBCarryMask - mov edi, row // edi ==> Avg(x) - movq mm4, HBClearMask - mov esi, prev_row // esi ==> Prior(x) - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm2, [edi + ebx - 8] // Load previous aligned 8 bytes - // (we correct position in loop below) -davg3lp: - movq mm0, [edi + ebx] // Load mm0 with Avg(x) - // Add (Prev_row/2) to Average - movq mm3, mm5 - psrlq mm2, ShiftRem // Correct position Raw(x-bpp) data - movq mm1, [esi + ebx] // Load mm1 with Prior(x) - movq mm6, mm7 - pand mm3, mm1 // get lsb for each prev_row byte - psrlq mm1, 1 // divide prev_row bytes by 2 - pand mm1, mm4 // clear invalid bit 7 of each byte - paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte - // Add 1st active group (Raw(x-bpp)/2) to Average with LBCarry - movq mm1, mm3 // now use mm1 for getting LBCarrys - pand mm1, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 (Only valid for active group) - psrlq mm2, 1 // divide raw bytes by 2 - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte - pand mm2, mm6 // Leave only Active Group 1 bytes to add to Avg - paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active - // byte - // Add 2nd active group (Raw(x-bpp)/2) to Average with LBCarry - psllq mm6, ShiftBpp // shift the mm6 mask to cover bytes 3-5 - movq mm2, mm0 // mov updated Raws to mm2 - psllq mm2, ShiftBpp // shift data to position correctly - movq mm1, mm3 // now use mm1 for getting LBCarrys - pand mm1, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 (Only valid for active group) - psrlq mm2, 1 // divide raw bytes by 2 - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte - pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg - paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active - // byte - - // Add 3rd active group (Raw(x-bpp)/2) to Average with LBCarry - psllq mm6, ShiftBpp // shift the mm6 mask to cover the last two - // bytes - movq mm2, mm0 // mov updated Raws to mm2 - psllq mm2, ShiftBpp // shift data to position correctly - // Data only needs to be shifted once here to - // get the correct x-bpp offset. - movq mm1, mm3 // now use mm1 for getting LBCarrys - pand mm1, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 (Only valid for active group) - psrlq mm2, 1 // divide raw bytes by 2 - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte - pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg - add ebx, 8 - paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active - // byte - - // Now ready to write back to memory - movq [edi + ebx - 8], mm0 - // Move updated Raw(x) to use as Raw(x-bpp) for next loop - cmp ebx, MMXLength - movq mm2, mm0 // mov updated Raw(x) to mm2 - jb davg3lp - } // end _asm block - } - break; - - case 6: - case 4: - case 7: - case 5: - { - ActiveMask.use = 0xffffffffffffffff; // use shift below to clear - // appropriate inactive bytes - ShiftBpp.use = bpp << 3; - ShiftRem.use = 64 - ShiftBpp.use; - _asm { - movq mm4, HBClearMask - // Re-init address pointers and offset - mov ebx, diff // ebx ==> x = offset to alignment boundary - // Load ActiveMask and clear all bytes except for 1st active group - movq mm7, ActiveMask - mov edi, row // edi ==> Avg(x) - psrlq mm7, ShiftRem - mov esi, prev_row // esi ==> Prior(x) - movq mm6, mm7 - movq mm5, LBCarryMask - psllq mm6, ShiftBpp // Create mask for 2nd active group - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm2, [edi + ebx - 8] // Load previous aligned 8 bytes - // (we correct position in loop below) -davg4lp: - movq mm0, [edi + ebx] - psrlq mm2, ShiftRem // shift data to position correctly - movq mm1, [esi + ebx] - // Add (Prev_row/2) to Average - movq mm3, mm5 - pand mm3, mm1 // get lsb for each prev_row byte - psrlq mm1, 1 // divide prev_row bytes by 2 - pand mm1, mm4 // clear invalid bit 7 of each byte - paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte - // Add 1st active group (Raw(x-bpp)/2) to Average with LBCarry - movq mm1, mm3 // now use mm1 for getting LBCarrys - pand mm1, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 (Only valid for active group) - psrlq mm2, 1 // divide raw bytes by 2 - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte - pand mm2, mm7 // Leave only Active Group 1 bytes to add to Avg - paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active - // byte - // Add 2nd active group (Raw(x-bpp)/2) to Average with LBCarry - movq mm2, mm0 // mov updated Raws to mm2 - psllq mm2, ShiftBpp // shift data to position correctly - add ebx, 8 - movq mm1, mm3 // now use mm1 for getting LBCarrys - pand mm1, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 (Only valid for active group) - psrlq mm2, 1 // divide raw bytes by 2 - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte - pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg - paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active - // byte - cmp ebx, MMXLength - // Now ready to write back to memory - movq [edi + ebx - 8], mm0 - // Prep Raw(x-bpp) for next loop - movq mm2, mm0 // mov updated Raws to mm2 - jb davg4lp - } // end _asm block - } - break; - case 2: - { - ActiveMask.use = 0x000000000000ffff; - ShiftBpp.use = 16; // == 2 * 8 [BUGFIX] - ShiftRem.use = 48; // == 64 - 16 [BUGFIX] - _asm { - // Load ActiveMask - movq mm7, ActiveMask - // Re-init address pointers and offset - mov ebx, diff // ebx ==> x = offset to alignment boundary - movq mm5, LBCarryMask - mov edi, row // edi ==> Avg(x) - movq mm4, HBClearMask - mov esi, prev_row // esi ==> Prior(x) - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm2, [edi + ebx - 8] // Load previous aligned 8 bytes - // (we correct position in loop below) -davg2lp: - movq mm0, [edi + ebx] - psrlq mm2, ShiftRem // shift data to position correctly [BUGFIX] - movq mm1, [esi + ebx] - // Add (Prev_row/2) to Average - movq mm3, mm5 - pand mm3, mm1 // get lsb for each prev_row byte - psrlq mm1, 1 // divide prev_row bytes by 2 - pand mm1, mm4 // clear invalid bit 7 of each byte - movq mm6, mm7 - paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte - // Add 1st active group (Raw(x-bpp)/2) to Average with LBCarry - movq mm1, mm3 // now use mm1 for getting LBCarrys - pand mm1, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 (Only valid for active group) - psrlq mm2, 1 // divide raw bytes by 2 - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte - pand mm2, mm6 // Leave only Active Group 1 bytes to add to Avg - paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active byte - // Add 2nd active group (Raw(x-bpp)/2) to Average with LBCarry - psllq mm6, ShiftBpp // shift the mm6 mask to cover bytes 2 & 3 - movq mm2, mm0 // mov updated Raws to mm2 - psllq mm2, ShiftBpp // shift data to position correctly - movq mm1, mm3 // now use mm1 for getting LBCarrys - pand mm1, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 (Only valid for active group) - psrlq mm2, 1 // divide raw bytes by 2 - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte - pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg - paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active byte - - // Add rdd active group (Raw(x-bpp)/2) to Average with LBCarry - psllq mm6, ShiftBpp // shift the mm6 mask to cover bytes 4 & 5 - movq mm2, mm0 // mov updated Raws to mm2 - psllq mm2, ShiftBpp // shift data to position correctly - // Data only needs to be shifted once here to - // get the correct x-bpp offset. - movq mm1, mm3 // now use mm1 for getting LBCarrys - pand mm1, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 (Only valid for active group) - psrlq mm2, 1 // divide raw bytes by 2 - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte - pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg - paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active byte - - // Add 4th active group (Raw(x-bpp)/2) to Average with LBCarry - psllq mm6, ShiftBpp // shift the mm6 mask to cover bytes 6 & 7 - movq mm2, mm0 // mov updated Raws to mm2 - psllq mm2, ShiftBpp // shift data to position correctly - // Data only needs to be shifted once here to - // get the correct x-bpp offset. - add ebx, 8 - movq mm1, mm3 // now use mm1 for getting LBCarrys - pand mm1, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 (Only valid for active group) - psrlq mm2, 1 // divide raw bytes by 2 - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte - pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg - paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active byte - - cmp ebx, MMXLength - // Now ready to write back to memory - movq [edi + ebx - 8], mm0 - // Prep Raw(x-bpp) for next loop - movq mm2, mm0 // mov updated Raws to mm2 - jb davg2lp - } // end _asm block - } - break; - - case 1: // bpp == 1 - { - _asm { - // Re-init address pointers and offset - mov ebx, diff // ebx ==> x = offset to alignment boundary - mov edi, row // edi ==> Avg(x) - cmp ebx, FullLength // Test if offset at end of array - jnb davg1end - // Do Paeth decode for remaining bytes - mov esi, prev_row // esi ==> Prior(x) - mov edx, edi - xor ecx, ecx // zero ecx before using cl & cx in loop below - sub edx, bpp // edx ==> Raw(x-bpp) -davg1lp: - // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) - xor eax, eax - mov cl, [esi + ebx] // load cl with Prior(x) - mov al, [edx + ebx] // load al with Raw(x-bpp) - add ax, cx - inc ebx - shr ax, 1 // divide by 2 - add al, [edi+ebx-1] // Add Avg(x); -1 to offset inc ebx - cmp ebx, FullLength // Check if at end of array - mov [edi+ebx-1], al // Write back Raw(x); - // mov does not affect flags; -1 to offset inc ebx - jb davg1lp -davg1end: - } // end _asm block - } - return; - - case 8: // bpp == 8 - { - _asm { - // Re-init address pointers and offset - mov ebx, diff // ebx ==> x = offset to alignment boundary - movq mm5, LBCarryMask - mov edi, row // edi ==> Avg(x) - movq mm4, HBClearMask - mov esi, prev_row // esi ==> Prior(x) - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm2, [edi + ebx - 8] // Load previous aligned 8 bytes - // (NO NEED to correct position in loop below) -davg8lp: - movq mm0, [edi + ebx] - movq mm3, mm5 - movq mm1, [esi + ebx] - add ebx, 8 - pand mm3, mm1 // get lsb for each prev_row byte - psrlq mm1, 1 // divide prev_row bytes by 2 - pand mm3, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 - psrlq mm2, 1 // divide raw bytes by 2 - pand mm1, mm4 // clear invalid bit 7 of each byte - paddb mm0, mm3 // add LBCarrys to Avg for each byte - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte - paddb mm0, mm2 // add (Raw/2) to Avg for each byte - cmp ebx, MMXLength - movq [edi + ebx - 8], mm0 - movq mm2, mm0 // reuse as Raw(x-bpp) - jb davg8lp - } // end _asm block - } - break; - default: // bpp greater than 8 - { - _asm { - movq mm5, LBCarryMask - // Re-init address pointers and offset - mov ebx, diff // ebx ==> x = offset to alignment boundary - mov edi, row // edi ==> Avg(x) - movq mm4, HBClearMask - mov edx, edi - mov esi, prev_row // esi ==> Prior(x) - sub edx, bpp // edx ==> Raw(x-bpp) -davgAlp: - movq mm0, [edi + ebx] - movq mm3, mm5 - movq mm1, [esi + ebx] - pand mm3, mm1 // get lsb for each prev_row byte - movq mm2, [edx + ebx] - psrlq mm1, 1 // divide prev_row bytes by 2 - pand mm3, mm2 // get LBCarrys for each byte where both - // lsb's were == 1 - psrlq mm2, 1 // divide raw bytes by 2 - pand mm1, mm4 // clear invalid bit 7 of each byte - paddb mm0, mm3 // add LBCarrys to Avg for each byte - pand mm2, mm4 // clear invalid bit 7 of each byte - paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte - add ebx, 8 - paddb mm0, mm2 // add (Raw/2) to Avg for each byte - cmp ebx, MMXLength - movq [edi + ebx - 8], mm0 - jb davgAlp - } // end _asm block - } - break; - } // end switch ( bpp ) - - _asm { - // MMX acceleration complete now do clean-up - // Check if any remaining bytes left to decode - mov ebx, MMXLength // ebx ==> x = offset bytes remaining after MMX - mov edi, row // edi ==> Avg(x) - cmp ebx, FullLength // Test if offset at end of array - jnb davgend - // Do Paeth decode for remaining bytes - mov esi, prev_row // esi ==> Prior(x) - mov edx, edi - xor ecx, ecx // zero ecx before using cl & cx in loop below - sub edx, bpp // edx ==> Raw(x-bpp) -davglp2: - // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) - xor eax, eax - mov cl, [esi + ebx] // load cl with Prior(x) - mov al, [edx + ebx] // load al with Raw(x-bpp) - add ax, cx - inc ebx - shr ax, 1 // divide by 2 - add al, [edi+ebx-1] // Add Avg(x); -1 to offset inc ebx - cmp ebx, FullLength // Check if at end of array - mov [edi+ebx-1], al // Write back Raw(x); - // mov does not affect flags; -1 to offset inc ebx - jb davglp2 -davgend: - emms // End MMX instructions; prep for possible FP instrs. - } // end _asm block -} - -// Optimized code for PNG Paeth filter decoder -void /* PRIVATE */ -png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row, - png_bytep prev_row) -{ - png_uint_32 FullLength; - png_uint_32 MMXLength; - //png_uint_32 len; - int bpp; - int diff; - //int ptemp; - int patemp, pbtemp, pctemp; - - bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel - FullLength = row_info->rowbytes; // # of bytes to filter - _asm - { - xor ebx, ebx // ebx ==> x offset - mov edi, row - xor edx, edx // edx ==> x-bpp offset - mov esi, prev_row - xor eax, eax - - // Compute the Raw value for the first bpp bytes - // Note: the formula works out to be always - // Paeth(x) = Raw(x) + Prior(x) where x < bpp -dpthrlp: - mov al, [edi + ebx] - add al, [esi + ebx] - inc ebx - cmp ebx, bpp - mov [edi + ebx - 1], al - jb dpthrlp - // get # of bytes to alignment - mov diff, edi // take start of row - add diff, ebx // add bpp - xor ecx, ecx - add diff, 0xf // add 7 + 8 to incr past alignment boundary - and diff, 0xfffffff8 // mask to alignment boundary - sub diff, edi // subtract from start ==> value ebx at alignment - jz dpthgo - // fix alignment -dpthlp1: - xor eax, eax - // pav = p - a = (a + b - c) - a = b - c - mov al, [esi + ebx] // load Prior(x) into al - mov cl, [esi + edx] // load Prior(x-bpp) into cl - sub eax, ecx // subtract Prior(x-bpp) - mov patemp, eax // Save pav for later use - xor eax, eax - // pbv = p - b = (a + b - c) - b = a - c - mov al, [edi + edx] // load Raw(x-bpp) into al - sub eax, ecx // subtract Prior(x-bpp) - mov ecx, eax - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - add eax, patemp // pcv = pav + pbv - // pc = abs(pcv) - test eax, 0x80000000 - jz dpthpca - neg eax // reverse sign of neg values -dpthpca: - mov pctemp, eax // save pc for later use - // pb = abs(pbv) - test ecx, 0x80000000 - jz dpthpba - neg ecx // reverse sign of neg values -dpthpba: - mov pbtemp, ecx // save pb for later use - // pa = abs(pav) - mov eax, patemp - test eax, 0x80000000 - jz dpthpaa - neg eax // reverse sign of neg values -dpthpaa: - mov patemp, eax // save pa for later use - // test if pa <= pb - cmp eax, ecx - jna dpthabb - // pa > pb; now test if pb <= pc - cmp ecx, pctemp - jna dpthbbc - // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - mov cl, [esi + edx] // load Prior(x-bpp) into cl - jmp dpthpaeth -dpthbbc: - // pb <= pc; Raw(x) = Paeth(x) + Prior(x) - mov cl, [esi + ebx] // load Prior(x) into cl - jmp dpthpaeth -dpthabb: - // pa <= pb; now test if pa <= pc - cmp eax, pctemp - jna dpthabc - // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - mov cl, [esi + edx] // load Prior(x-bpp) into cl - jmp dpthpaeth -dpthabc: - // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) - mov cl, [edi + edx] // load Raw(x-bpp) into cl -dpthpaeth: - inc ebx - inc edx - // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 - add [edi + ebx - 1], cl - cmp ebx, diff - jb dpthlp1 -dpthgo: - mov ecx, FullLength - mov eax, ecx - sub eax, ebx // subtract alignment fix - and eax, 0x00000007 // calc bytes over mult of 8 - sub ecx, eax // drop over bytes from original length - mov MMXLength, ecx - } // end _asm block - // Now do the math for the rest of the row - switch ( bpp ) - { - case 3: - { - ActiveMask.use = 0x0000000000ffffff; - ActiveMaskEnd.use = 0xffff000000000000; - ShiftBpp.use = 24; // == bpp(3) * 8 - ShiftRem.use = 40; // == 64 - 24 - _asm - { - mov ebx, diff - mov edi, row - mov esi, prev_row - pxor mm0, mm0 - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm1, [edi+ebx-8] -dpth3lp: - psrlq mm1, ShiftRem // shift last 3 bytes to 1st 3 bytes - movq mm2, [esi + ebx] // load b=Prior(x) - punpcklbw mm1, mm0 // Unpack High bytes of a - movq mm3, [esi+ebx-8] // Prep c=Prior(x-bpp) bytes - punpcklbw mm2, mm0 // Unpack High bytes of b - psrlq mm3, ShiftRem // shift last 3 bytes to 1st 3 bytes - // pav = p - a = (a + b - c) - a = b - c - movq mm4, mm2 - punpcklbw mm3, mm0 // Unpack High bytes of c - // pbv = p - b = (a + b - c) - b = a - c - movq mm5, mm1 - psubw mm4, mm3 - pxor mm7, mm7 - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - movq mm6, mm4 - psubw mm5, mm3 - - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - pcmpgtw mm0, mm4 // Create mask pav bytes < 0 - paddw mm6, mm5 - pand mm0, mm4 // Only pav bytes < 0 in mm7 - pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 - psubw mm4, mm0 - pand mm7, mm5 // Only pbv bytes < 0 in mm0 - psubw mm4, mm0 - psubw mm5, mm7 - pxor mm0, mm0 - pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 - pand mm0, mm6 // Only pav bytes < 0 in mm7 - psubw mm5, mm7 - psubw mm6, mm0 - // test pa <= pb - movq mm7, mm4 - psubw mm6, mm0 - pcmpgtw mm7, mm5 // pa > pb? - movq mm0, mm7 - // use mm7 mask to merge pa & pb - pand mm5, mm7 - // use mm0 mask copy to merge a & b - pand mm2, mm0 - pandn mm7, mm4 - pandn mm0, mm1 - paddw mm7, mm5 - paddw mm0, mm2 - // test ((pa <= pb)? pa:pb) <= pc - pcmpgtw mm7, mm6 // pab > pc? - pxor mm1, mm1 - pand mm3, mm7 - pandn mm7, mm0 - paddw mm7, mm3 - pxor mm0, mm0 - packuswb mm7, mm1 - movq mm3, [esi + ebx] // load c=Prior(x-bpp) - pand mm7, ActiveMask - movq mm2, mm3 // load b=Prior(x) step 1 - paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) - punpcklbw mm3, mm0 // Unpack High bytes of c - movq [edi + ebx], mm7 // write back updated value - movq mm1, mm7 // Now mm1 will be used as Raw(x-bpp) - // Now do Paeth for 2nd set of bytes (3-5) - psrlq mm2, ShiftBpp // load b=Prior(x) step 2 - punpcklbw mm1, mm0 // Unpack High bytes of a - pxor mm7, mm7 - punpcklbw mm2, mm0 // Unpack High bytes of b - // pbv = p - b = (a + b - c) - b = a - c - movq mm5, mm1 - // pav = p - a = (a + b - c) - a = b - c - movq mm4, mm2 - psubw mm5, mm3 - psubw mm4, mm3 - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = - // pav + pbv = pbv + pav - movq mm6, mm5 - paddw mm6, mm4 - - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - pcmpgtw mm0, mm5 // Create mask pbv bytes < 0 - pcmpgtw mm7, mm4 // Create mask pav bytes < 0 - pand mm0, mm5 // Only pbv bytes < 0 in mm0 - pand mm7, mm4 // Only pav bytes < 0 in mm7 - psubw mm5, mm0 - psubw mm4, mm7 - psubw mm5, mm0 - psubw mm4, mm7 - pxor mm0, mm0 - pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 - pand mm0, mm6 // Only pav bytes < 0 in mm7 - psubw mm6, mm0 - // test pa <= pb - movq mm7, mm4 - psubw mm6, mm0 - pcmpgtw mm7, mm5 // pa > pb? - movq mm0, mm7 - // use mm7 mask to merge pa & pb - pand mm5, mm7 - // use mm0 mask copy to merge a & b - pand mm2, mm0 - pandn mm7, mm4 - pandn mm0, mm1 - paddw mm7, mm5 - paddw mm0, mm2 - // test ((pa <= pb)? pa:pb) <= pc - pcmpgtw mm7, mm6 // pab > pc? - movq mm2, [esi + ebx] // load b=Prior(x) - pand mm3, mm7 - pandn mm7, mm0 - pxor mm1, mm1 - paddw mm7, mm3 - pxor mm0, mm0 - packuswb mm7, mm1 - movq mm3, mm2 // load c=Prior(x-bpp) step 1 - pand mm7, ActiveMask - punpckhbw mm2, mm0 // Unpack High bytes of b - psllq mm7, ShiftBpp // Shift bytes to 2nd group of 3 bytes - // pav = p - a = (a + b - c) - a = b - c - movq mm4, mm2 - paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) - psllq mm3, ShiftBpp // load c=Prior(x-bpp) step 2 - movq [edi + ebx], mm7 // write back updated value - movq mm1, mm7 - punpckhbw mm3, mm0 // Unpack High bytes of c - psllq mm1, ShiftBpp // Shift bytes - // Now mm1 will be used as Raw(x-bpp) - // Now do Paeth for 3rd, and final, set of bytes (6-7) - pxor mm7, mm7 - punpckhbw mm1, mm0 // Unpack High bytes of a - psubw mm4, mm3 - // pbv = p - b = (a + b - c) - b = a - c - movq mm5, mm1 - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - movq mm6, mm4 - psubw mm5, mm3 - pxor mm0, mm0 - paddw mm6, mm5 - - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - pcmpgtw mm0, mm4 // Create mask pav bytes < 0 - pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 - pand mm0, mm4 // Only pav bytes < 0 in mm7 - pand mm7, mm5 // Only pbv bytes < 0 in mm0 - psubw mm4, mm0 - psubw mm5, mm7 - psubw mm4, mm0 - psubw mm5, mm7 - pxor mm0, mm0 - pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 - pand mm0, mm6 // Only pav bytes < 0 in mm7 - psubw mm6, mm0 - // test pa <= pb - movq mm7, mm4 - psubw mm6, mm0 - pcmpgtw mm7, mm5 // pa > pb? - movq mm0, mm7 - // use mm0 mask copy to merge a & b - pand mm2, mm0 - // use mm7 mask to merge pa & pb - pand mm5, mm7 - pandn mm0, mm1 - pandn mm7, mm4 - paddw mm0, mm2 - paddw mm7, mm5 - // test ((pa <= pb)? pa:pb) <= pc - pcmpgtw mm7, mm6 // pab > pc? - pand mm3, mm7 - pandn mm7, mm0 - paddw mm7, mm3 - pxor mm1, mm1 - packuswb mm1, mm7 - // Step ebx to next set of 8 bytes and repeat loop til done - add ebx, 8 - pand mm1, ActiveMaskEnd - paddb mm1, [edi + ebx - 8] // add Paeth predictor with Raw(x) - - cmp ebx, MMXLength - pxor mm0, mm0 // pxor does not affect flags - movq [edi + ebx - 8], mm1 // write back updated value - // mm1 will be used as Raw(x-bpp) next loop - // mm3 ready to be used as Prior(x-bpp) next loop - jb dpth3lp - } // end _asm block - } - break; - - case 6: - case 7: - case 5: - { - ActiveMask.use = 0x00000000ffffffff; - ActiveMask2.use = 0xffffffff00000000; - ShiftBpp.use = bpp << 3; // == bpp * 8 - ShiftRem.use = 64 - ShiftBpp.use; - _asm - { - mov ebx, diff - mov edi, row - mov esi, prev_row - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm1, [edi+ebx-8] - pxor mm0, mm0 -dpth6lp: - // Must shift to position Raw(x-bpp) data - psrlq mm1, ShiftRem - // Do first set of 4 bytes - movq mm3, [esi+ebx-8] // read c=Prior(x-bpp) bytes - punpcklbw mm1, mm0 // Unpack Low bytes of a - movq mm2, [esi + ebx] // load b=Prior(x) - punpcklbw mm2, mm0 // Unpack Low bytes of b - // Must shift to position Prior(x-bpp) data - psrlq mm3, ShiftRem - // pav = p - a = (a + b - c) - a = b - c - movq mm4, mm2 - punpcklbw mm3, mm0 // Unpack Low bytes of c - // pbv = p - b = (a + b - c) - b = a - c - movq mm5, mm1 - psubw mm4, mm3 - pxor mm7, mm7 - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - movq mm6, mm4 - psubw mm5, mm3 - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - pcmpgtw mm0, mm4 // Create mask pav bytes < 0 - paddw mm6, mm5 - pand mm0, mm4 // Only pav bytes < 0 in mm7 - pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 - psubw mm4, mm0 - pand mm7, mm5 // Only pbv bytes < 0 in mm0 - psubw mm4, mm0 - psubw mm5, mm7 - pxor mm0, mm0 - pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 - pand mm0, mm6 // Only pav bytes < 0 in mm7 - psubw mm5, mm7 - psubw mm6, mm0 - // test pa <= pb - movq mm7, mm4 - psubw mm6, mm0 - pcmpgtw mm7, mm5 // pa > pb? - movq mm0, mm7 - // use mm7 mask to merge pa & pb - pand mm5, mm7 - // use mm0 mask copy to merge a & b - pand mm2, mm0 - pandn mm7, mm4 - pandn mm0, mm1 - paddw mm7, mm5 - paddw mm0, mm2 - // test ((pa <= pb)? pa:pb) <= pc - pcmpgtw mm7, mm6 // pab > pc? - pxor mm1, mm1 - pand mm3, mm7 - pandn mm7, mm0 - paddw mm7, mm3 - pxor mm0, mm0 - packuswb mm7, mm1 - movq mm3, [esi + ebx - 8] // load c=Prior(x-bpp) - pand mm7, ActiveMask - psrlq mm3, ShiftRem - movq mm2, [esi + ebx] // load b=Prior(x) step 1 - paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) - movq mm6, mm2 - movq [edi + ebx], mm7 // write back updated value - movq mm1, [edi+ebx-8] - psllq mm6, ShiftBpp - movq mm5, mm7 - psrlq mm1, ShiftRem - por mm3, mm6 - psllq mm5, ShiftBpp - punpckhbw mm3, mm0 // Unpack High bytes of c - por mm1, mm5 - // Do second set of 4 bytes - punpckhbw mm2, mm0 // Unpack High bytes of b - punpckhbw mm1, mm0 // Unpack High bytes of a - // pav = p - a = (a + b - c) - a = b - c - movq mm4, mm2 - // pbv = p - b = (a + b - c) - b = a - c - movq mm5, mm1 - psubw mm4, mm3 - pxor mm7, mm7 - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - movq mm6, mm4 - psubw mm5, mm3 - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - pcmpgtw mm0, mm4 // Create mask pav bytes < 0 - paddw mm6, mm5 - pand mm0, mm4 // Only pav bytes < 0 in mm7 - pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 - psubw mm4, mm0 - pand mm7, mm5 // Only pbv bytes < 0 in mm0 - psubw mm4, mm0 - psubw mm5, mm7 - pxor mm0, mm0 - pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 - pand mm0, mm6 // Only pav bytes < 0 in mm7 - psubw mm5, mm7 - psubw mm6, mm0 - // test pa <= pb - movq mm7, mm4 - psubw mm6, mm0 - pcmpgtw mm7, mm5 // pa > pb? - movq mm0, mm7 - // use mm7 mask to merge pa & pb - pand mm5, mm7 - // use mm0 mask copy to merge a & b - pand mm2, mm0 - pandn mm7, mm4 - pandn mm0, mm1 - paddw mm7, mm5 - paddw mm0, mm2 - // test ((pa <= pb)? pa:pb) <= pc - pcmpgtw mm7, mm6 // pab > pc? - pxor mm1, mm1 - pand mm3, mm7 - pandn mm7, mm0 - pxor mm1, mm1 - paddw mm7, mm3 - pxor mm0, mm0 - // Step ex to next set of 8 bytes and repeat loop til done - add ebx, 8 - packuswb mm1, mm7 - paddb mm1, [edi + ebx - 8] // add Paeth predictor with Raw(x) - cmp ebx, MMXLength - movq [edi + ebx - 8], mm1 // write back updated value - // mm1 will be used as Raw(x-bpp) next loop - jb dpth6lp - } // end _asm block - } - break; - - case 4: - { - ActiveMask.use = 0x00000000ffffffff; - _asm { - mov ebx, diff - mov edi, row - mov esi, prev_row - pxor mm0, mm0 - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm1, [edi+ebx-8] // Only time should need to read - // a=Raw(x-bpp) bytes -dpth4lp: - // Do first set of 4 bytes - movq mm3, [esi+ebx-8] // read c=Prior(x-bpp) bytes - punpckhbw mm1, mm0 // Unpack Low bytes of a - movq mm2, [esi + ebx] // load b=Prior(x) - punpcklbw mm2, mm0 // Unpack High bytes of b - // pav = p - a = (a + b - c) - a = b - c - movq mm4, mm2 - punpckhbw mm3, mm0 // Unpack High bytes of c - // pbv = p - b = (a + b - c) - b = a - c - movq mm5, mm1 - psubw mm4, mm3 - pxor mm7, mm7 - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - movq mm6, mm4 - psubw mm5, mm3 - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - pcmpgtw mm0, mm4 // Create mask pav bytes < 0 - paddw mm6, mm5 - pand mm0, mm4 // Only pav bytes < 0 in mm7 - pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 - psubw mm4, mm0 - pand mm7, mm5 // Only pbv bytes < 0 in mm0 - psubw mm4, mm0 - psubw mm5, mm7 - pxor mm0, mm0 - pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 - pand mm0, mm6 // Only pav bytes < 0 in mm7 - psubw mm5, mm7 - psubw mm6, mm0 - // test pa <= pb - movq mm7, mm4 - psubw mm6, mm0 - pcmpgtw mm7, mm5 // pa > pb? - movq mm0, mm7 - // use mm7 mask to merge pa & pb - pand mm5, mm7 - // use mm0 mask copy to merge a & b - pand mm2, mm0 - pandn mm7, mm4 - pandn mm0, mm1 - paddw mm7, mm5 - paddw mm0, mm2 - // test ((pa <= pb)? pa:pb) <= pc - pcmpgtw mm7, mm6 // pab > pc? - pxor mm1, mm1 - pand mm3, mm7 - pandn mm7, mm0 - paddw mm7, mm3 - pxor mm0, mm0 - packuswb mm7, mm1 - movq mm3, [esi + ebx] // load c=Prior(x-bpp) - pand mm7, ActiveMask - movq mm2, mm3 // load b=Prior(x) step 1 - paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) - punpcklbw mm3, mm0 // Unpack High bytes of c - movq [edi + ebx], mm7 // write back updated value - movq mm1, mm7 // Now mm1 will be used as Raw(x-bpp) - // Do second set of 4 bytes - punpckhbw mm2, mm0 // Unpack Low bytes of b - punpcklbw mm1, mm0 // Unpack Low bytes of a - // pav = p - a = (a + b - c) - a = b - c - movq mm4, mm2 - // pbv = p - b = (a + b - c) - b = a - c - movq mm5, mm1 - psubw mm4, mm3 - pxor mm7, mm7 - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - movq mm6, mm4 - psubw mm5, mm3 - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - pcmpgtw mm0, mm4 // Create mask pav bytes < 0 - paddw mm6, mm5 - pand mm0, mm4 // Only pav bytes < 0 in mm7 - pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 - psubw mm4, mm0 - pand mm7, mm5 // Only pbv bytes < 0 in mm0 - psubw mm4, mm0 - psubw mm5, mm7 - pxor mm0, mm0 - pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 - pand mm0, mm6 // Only pav bytes < 0 in mm7 - psubw mm5, mm7 - psubw mm6, mm0 - // test pa <= pb - movq mm7, mm4 - psubw mm6, mm0 - pcmpgtw mm7, mm5 // pa > pb? - movq mm0, mm7 - // use mm7 mask to merge pa & pb - pand mm5, mm7 - // use mm0 mask copy to merge a & b - pand mm2, mm0 - pandn mm7, mm4 - pandn mm0, mm1 - paddw mm7, mm5 - paddw mm0, mm2 - // test ((pa <= pb)? pa:pb) <= pc - pcmpgtw mm7, mm6 // pab > pc? - pxor mm1, mm1 - pand mm3, mm7 - pandn mm7, mm0 - pxor mm1, mm1 - paddw mm7, mm3 - pxor mm0, mm0 - // Step ex to next set of 8 bytes and repeat loop til done - add ebx, 8 - packuswb mm1, mm7 - paddb mm1, [edi + ebx - 8] // add Paeth predictor with Raw(x) - cmp ebx, MMXLength - movq [edi + ebx - 8], mm1 // write back updated value - // mm1 will be used as Raw(x-bpp) next loop - jb dpth4lp - } // end _asm block - } - break; - case 8: // bpp == 8 - { - ActiveMask.use = 0x00000000ffffffff; - _asm { - mov ebx, diff - mov edi, row - mov esi, prev_row - pxor mm0, mm0 - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm1, [edi+ebx-8] // Only time should need to read - // a=Raw(x-bpp) bytes -dpth8lp: - // Do first set of 4 bytes - movq mm3, [esi+ebx-8] // read c=Prior(x-bpp) bytes - punpcklbw mm1, mm0 // Unpack Low bytes of a - movq mm2, [esi + ebx] // load b=Prior(x) - punpcklbw mm2, mm0 // Unpack Low bytes of b - // pav = p - a = (a + b - c) - a = b - c - movq mm4, mm2 - punpcklbw mm3, mm0 // Unpack Low bytes of c - // pbv = p - b = (a + b - c) - b = a - c - movq mm5, mm1 - psubw mm4, mm3 - pxor mm7, mm7 - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - movq mm6, mm4 - psubw mm5, mm3 - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - pcmpgtw mm0, mm4 // Create mask pav bytes < 0 - paddw mm6, mm5 - pand mm0, mm4 // Only pav bytes < 0 in mm7 - pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 - psubw mm4, mm0 - pand mm7, mm5 // Only pbv bytes < 0 in mm0 - psubw mm4, mm0 - psubw mm5, mm7 - pxor mm0, mm0 - pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 - pand mm0, mm6 // Only pav bytes < 0 in mm7 - psubw mm5, mm7 - psubw mm6, mm0 - // test pa <= pb - movq mm7, mm4 - psubw mm6, mm0 - pcmpgtw mm7, mm5 // pa > pb? - movq mm0, mm7 - // use mm7 mask to merge pa & pb - pand mm5, mm7 - // use mm0 mask copy to merge a & b - pand mm2, mm0 - pandn mm7, mm4 - pandn mm0, mm1 - paddw mm7, mm5 - paddw mm0, mm2 - // test ((pa <= pb)? pa:pb) <= pc - pcmpgtw mm7, mm6 // pab > pc? - pxor mm1, mm1 - pand mm3, mm7 - pandn mm7, mm0 - paddw mm7, mm3 - pxor mm0, mm0 - packuswb mm7, mm1 - movq mm3, [esi+ebx-8] // read c=Prior(x-bpp) bytes - pand mm7, ActiveMask - movq mm2, [esi + ebx] // load b=Prior(x) - paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) - punpckhbw mm3, mm0 // Unpack High bytes of c - movq [edi + ebx], mm7 // write back updated value - movq mm1, [edi+ebx-8] // read a=Raw(x-bpp) bytes - - // Do second set of 4 bytes - punpckhbw mm2, mm0 // Unpack High bytes of b - punpckhbw mm1, mm0 // Unpack High bytes of a - // pav = p - a = (a + b - c) - a = b - c - movq mm4, mm2 - // pbv = p - b = (a + b - c) - b = a - c - movq mm5, mm1 - psubw mm4, mm3 - pxor mm7, mm7 - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - movq mm6, mm4 - psubw mm5, mm3 - // pa = abs(p-a) = abs(pav) - // pb = abs(p-b) = abs(pbv) - // pc = abs(p-c) = abs(pcv) - pcmpgtw mm0, mm4 // Create mask pav bytes < 0 - paddw mm6, mm5 - pand mm0, mm4 // Only pav bytes < 0 in mm7 - pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 - psubw mm4, mm0 - pand mm7, mm5 // Only pbv bytes < 0 in mm0 - psubw mm4, mm0 - psubw mm5, mm7 - pxor mm0, mm0 - pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 - pand mm0, mm6 // Only pav bytes < 0 in mm7 - psubw mm5, mm7 - psubw mm6, mm0 - // test pa <= pb - movq mm7, mm4 - psubw mm6, mm0 - pcmpgtw mm7, mm5 // pa > pb? - movq mm0, mm7 - // use mm7 mask to merge pa & pb - pand mm5, mm7 - // use mm0 mask copy to merge a & b - pand mm2, mm0 - pandn mm7, mm4 - pandn mm0, mm1 - paddw mm7, mm5 - paddw mm0, mm2 - // test ((pa <= pb)? pa:pb) <= pc - pcmpgtw mm7, mm6 // pab > pc? - pxor mm1, mm1 - pand mm3, mm7 - pandn mm7, mm0 - pxor mm1, mm1 - paddw mm7, mm3 - pxor mm0, mm0 - // Step ex to next set of 8 bytes and repeat loop til done - add ebx, 8 - packuswb mm1, mm7 - paddb mm1, [edi + ebx - 8] // add Paeth predictor with Raw(x) - cmp ebx, MMXLength - movq [edi + ebx - 8], mm1 // write back updated value - // mm1 will be used as Raw(x-bpp) next loop - jb dpth8lp - } // end _asm block - } - break; - - case 1: // bpp = 1 - case 2: // bpp = 2 - default: // bpp > 8 - { - _asm { - mov ebx, diff - cmp ebx, FullLength - jnb dpthdend - mov edi, row - mov esi, prev_row - // Do Paeth decode for remaining bytes - mov edx, ebx - xor ecx, ecx // zero ecx before using cl & cx in loop below - sub edx, bpp // Set edx = ebx - bpp -dpthdlp: - xor eax, eax - // pav = p - a = (a + b - c) - a = b - c - mov al, [esi + ebx] // load Prior(x) into al - mov cl, [esi + edx] // load Prior(x-bpp) into cl - sub eax, ecx // subtract Prior(x-bpp) - mov patemp, eax // Save pav for later use - xor eax, eax - // pbv = p - b = (a + b - c) - b = a - c - mov al, [edi + edx] // load Raw(x-bpp) into al - sub eax, ecx // subtract Prior(x-bpp) - mov ecx, eax - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - add eax, patemp // pcv = pav + pbv - // pc = abs(pcv) - test eax, 0x80000000 - jz dpthdpca - neg eax // reverse sign of neg values -dpthdpca: - mov pctemp, eax // save pc for later use - // pb = abs(pbv) - test ecx, 0x80000000 - jz dpthdpba - neg ecx // reverse sign of neg values -dpthdpba: - mov pbtemp, ecx // save pb for later use - // pa = abs(pav) - mov eax, patemp - test eax, 0x80000000 - jz dpthdpaa - neg eax // reverse sign of neg values -dpthdpaa: - mov patemp, eax // save pa for later use - // test if pa <= pb - cmp eax, ecx - jna dpthdabb - // pa > pb; now test if pb <= pc - cmp ecx, pctemp - jna dpthdbbc - // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - mov cl, [esi + edx] // load Prior(x-bpp) into cl - jmp dpthdpaeth -dpthdbbc: - // pb <= pc; Raw(x) = Paeth(x) + Prior(x) - mov cl, [esi + ebx] // load Prior(x) into cl - jmp dpthdpaeth -dpthdabb: - // pa <= pb; now test if pa <= pc - cmp eax, pctemp - jna dpthdabc - // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - mov cl, [esi + edx] // load Prior(x-bpp) into cl - jmp dpthdpaeth -dpthdabc: - // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) - mov cl, [edi + edx] // load Raw(x-bpp) into cl -dpthdpaeth: - inc ebx - inc edx - // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 - add [edi + ebx - 1], cl - cmp ebx, FullLength - jb dpthdlp -dpthdend: - } // end _asm block - } - return; // No need to go further with this one - } // end switch ( bpp ) - _asm - { - // MMX acceleration complete now do clean-up - // Check if any remaining bytes left to decode - mov ebx, MMXLength - cmp ebx, FullLength - jnb dpthend - mov edi, row - mov esi, prev_row - // Do Paeth decode for remaining bytes - mov edx, ebx - xor ecx, ecx // zero ecx before using cl & cx in loop below - sub edx, bpp // Set edx = ebx - bpp -dpthlp2: - xor eax, eax - // pav = p - a = (a + b - c) - a = b - c - mov al, [esi + ebx] // load Prior(x) into al - mov cl, [esi + edx] // load Prior(x-bpp) into cl - sub eax, ecx // subtract Prior(x-bpp) - mov patemp, eax // Save pav for later use - xor eax, eax - // pbv = p - b = (a + b - c) - b = a - c - mov al, [edi + edx] // load Raw(x-bpp) into al - sub eax, ecx // subtract Prior(x-bpp) - mov ecx, eax - // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv - add eax, patemp // pcv = pav + pbv - // pc = abs(pcv) - test eax, 0x80000000 - jz dpthpca2 - neg eax // reverse sign of neg values -dpthpca2: - mov pctemp, eax // save pc for later use - // pb = abs(pbv) - test ecx, 0x80000000 - jz dpthpba2 - neg ecx // reverse sign of neg values -dpthpba2: - mov pbtemp, ecx // save pb for later use - // pa = abs(pav) - mov eax, patemp - test eax, 0x80000000 - jz dpthpaa2 - neg eax // reverse sign of neg values -dpthpaa2: - mov patemp, eax // save pa for later use - // test if pa <= pb - cmp eax, ecx - jna dpthabb2 - // pa > pb; now test if pb <= pc - cmp ecx, pctemp - jna dpthbbc2 - // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - mov cl, [esi + edx] // load Prior(x-bpp) into cl - jmp dpthpaeth2 -dpthbbc2: - // pb <= pc; Raw(x) = Paeth(x) + Prior(x) - mov cl, [esi + ebx] // load Prior(x) into cl - jmp dpthpaeth2 -dpthabb2: - // pa <= pb; now test if pa <= pc - cmp eax, pctemp - jna dpthabc2 - // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) - mov cl, [esi + edx] // load Prior(x-bpp) into cl - jmp dpthpaeth2 -dpthabc2: - // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) - mov cl, [edi + edx] // load Raw(x-bpp) into cl -dpthpaeth2: - inc ebx - inc edx - // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 - add [edi + ebx - 1], cl - cmp ebx, FullLength - jb dpthlp2 -dpthend: - emms // End MMX instructions; prep for possible FP instrs. - } // end _asm block -} - -// Optimized code for PNG Sub filter decoder -void /* PRIVATE */ -png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row) -{ - //int test; - int bpp; - png_uint_32 FullLength; - png_uint_32 MMXLength; - int diff; - - bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel - FullLength = row_info->rowbytes - bpp; // # of bytes to filter - _asm { - mov edi, row - mov esi, edi // lp = row - add edi, bpp // rp = row + bpp - xor eax, eax - // get # of bytes to alignment - mov diff, edi // take start of row - add diff, 0xf // add 7 + 8 to incr past - // alignment boundary - xor ebx, ebx - and diff, 0xfffffff8 // mask to alignment boundary - sub diff, edi // subtract from start ==> value - // ebx at alignment - jz dsubgo - // fix alignment -dsublp1: - mov al, [esi+ebx] - add [edi+ebx], al - inc ebx - cmp ebx, diff - jb dsublp1 -dsubgo: - mov ecx, FullLength - mov edx, ecx - sub edx, ebx // subtract alignment fix - and edx, 0x00000007 // calc bytes over mult of 8 - sub ecx, edx // drop over bytes from length - mov MMXLength, ecx - } // end _asm block - - // Now do the math for the rest of the row - switch ( bpp ) - { - case 3: - { - ActiveMask.use = 0x0000ffffff000000; - ShiftBpp.use = 24; // == 3 * 8 - ShiftRem.use = 40; // == 64 - 24 - _asm { - mov edi, row - movq mm7, ActiveMask // Load ActiveMask for 2nd active byte group - mov esi, edi // lp = row - add edi, bpp // rp = row + bpp - movq mm6, mm7 - mov ebx, diff - psllq mm6, ShiftBpp // Move mask in mm6 to cover 3rd active - // byte group - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm1, [edi+ebx-8] -dsub3lp: - psrlq mm1, ShiftRem // Shift data for adding 1st bpp bytes - // no need for mask; shift clears inactive bytes - // Add 1st active group - movq mm0, [edi+ebx] - paddb mm0, mm1 - // Add 2nd active group - movq mm1, mm0 // mov updated Raws to mm1 - psllq mm1, ShiftBpp // shift data to position correctly - pand mm1, mm7 // mask to use only 2nd active group - paddb mm0, mm1 - // Add 3rd active group - movq mm1, mm0 // mov updated Raws to mm1 - psllq mm1, ShiftBpp // shift data to position correctly - pand mm1, mm6 // mask to use only 3rd active group - add ebx, 8 - paddb mm0, mm1 - cmp ebx, MMXLength - movq [edi+ebx-8], mm0 // Write updated Raws back to array - // Prep for doing 1st add at top of loop - movq mm1, mm0 - jb dsub3lp - } // end _asm block - } - break; - - case 1: - { - // Placed here just in case this is a duplicate of the - // non-MMX code for the SUB filter in png_read_filter_row below - // - // png_bytep rp; - // png_bytep lp; - // png_uint_32 i; - // bpp = (row_info->pixel_depth + 7) >> 3; - // for (i = (png_uint_32)bpp, rp = row + bpp, lp = row; - // i < row_info->rowbytes; i++, rp++, lp++) - // { - // *rp = (png_byte)(((int)(*rp) + (int)(*lp)) & 0xff); - // } - _asm { - mov ebx, diff - mov edi, row - cmp ebx, FullLength - jnb dsub1end - mov esi, edi // lp = row - xor eax, eax - add edi, bpp // rp = row + bpp -dsub1lp: - mov al, [esi+ebx] - add [edi+ebx], al - inc ebx - cmp ebx, FullLength - jb dsub1lp -dsub1end: - } // end _asm block - } - return; - - case 6: - case 7: - case 4: - case 5: - { - ShiftBpp.use = bpp << 3; - ShiftRem.use = 64 - ShiftBpp.use; - _asm { - mov edi, row - mov ebx, diff - mov esi, edi // lp = row - add edi, bpp // rp = row + bpp - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm1, [edi+ebx-8] -dsub4lp: - psrlq mm1, ShiftRem // Shift data for adding 1st bpp bytes - // no need for mask; shift clears inactive bytes - movq mm0, [edi+ebx] - paddb mm0, mm1 - // Add 2nd active group - movq mm1, mm0 // mov updated Raws to mm1 - psllq mm1, ShiftBpp // shift data to position correctly - // there is no need for any mask - // since shift clears inactive bits/bytes - add ebx, 8 - paddb mm0, mm1 - cmp ebx, MMXLength - movq [edi+ebx-8], mm0 - movq mm1, mm0 // Prep for doing 1st add at top of loop - jb dsub4lp - } // end _asm block - } - break; - - case 2: - { - ActiveMask.use = 0x00000000ffff0000; - ShiftBpp.use = 16; // == 2 * 8 - ShiftRem.use = 48; // == 64 - 16 - _asm { - movq mm7, ActiveMask // Load ActiveMask for 2nd active byte group - mov ebx, diff - movq mm6, mm7 - mov edi, row - psllq mm6, ShiftBpp // Move mask in mm6 to cover 3rd active - // byte group - mov esi, edi // lp = row - movq mm5, mm6 - add edi, bpp // rp = row + bpp - psllq mm5, ShiftBpp // Move mask in mm5 to cover 4th active - // byte group - // PRIME the pump (load the first Raw(x-bpp) data set - movq mm1, [edi+ebx-8] -dsub2lp: - // Add 1st active group - psrlq mm1, ShiftRem // Shift data for adding 1st bpp bytes - // no need for mask; shift clears inactive - // bytes - movq mm0, [edi+ebx] - paddb mm0, mm1 - // Add 2nd active group - movq mm1, mm0 // mov updated Raws to mm1 - psllq mm1, ShiftBpp // shift data to position correctly - pand mm1, mm7 // mask to use only 2nd active group - paddb mm0, mm1 - // Add 3rd active group - movq mm1, mm0 // mov updated Raws to mm1 - psllq mm1, ShiftBpp // shift data to position correctly - pand mm1, mm6 // mask to use only 3rd active group - paddb mm0, mm1 - // Add 4th active group - movq mm1, mm0 // mov updated Raws to mm1 - psllq mm1, ShiftBpp // shift data to position correctly - pand mm1, mm5 // mask to use only 4th active group - add ebx, 8 - paddb mm0, mm1 - cmp ebx, MMXLength - movq [edi+ebx-8], mm0 // Write updated Raws back to array - movq mm1, mm0 // Prep for doing 1st add at top of loop - jb dsub2lp - } // end _asm block - } - break; - case 8: - { - _asm { - mov edi, row - mov ebx, diff - mov esi, edi // lp = row - add edi, bpp // rp = row + bpp - mov ecx, MMXLength - movq mm7, [edi+ebx-8] // PRIME the pump (load the first - // Raw(x-bpp) data set - and ecx, 0x0000003f // calc bytes over mult of 64 -dsub8lp: - movq mm0, [edi+ebx] // Load Sub(x) for 1st 8 bytes - paddb mm0, mm7 - movq mm1, [edi+ebx+8] // Load Sub(x) for 2nd 8 bytes - movq [edi+ebx], mm0 // Write Raw(x) for 1st 8 bytes - // Now mm0 will be used as Raw(x-bpp) for - // the 2nd group of 8 bytes. This will be - // repeated for each group of 8 bytes with - // the 8th group being used as the Raw(x-bpp) - // for the 1st group of the next loop. - paddb mm1, mm0 - movq mm2, [edi+ebx+16] // Load Sub(x) for 3rd 8 bytes - movq [edi+ebx+8], mm1 // Write Raw(x) for 2nd 8 bytes - paddb mm2, mm1 - movq mm3, [edi+ebx+24] // Load Sub(x) for 4th 8 bytes - movq [edi+ebx+16], mm2 // Write Raw(x) for 3rd 8 bytes - paddb mm3, mm2 - movq mm4, [edi+ebx+32] // Load Sub(x) for 5th 8 bytes - movq [edi+ebx+24], mm3 // Write Raw(x) for 4th 8 bytes - paddb mm4, mm3 - movq mm5, [edi+ebx+40] // Load Sub(x) for 6th 8 bytes - movq [edi+ebx+32], mm4 // Write Raw(x) for 5th 8 bytes - paddb mm5, mm4 - movq mm6, [edi+ebx+48] // Load Sub(x) for 7th 8 bytes - movq [edi+ebx+40], mm5 // Write Raw(x) for 6th 8 bytes - paddb mm6, mm5 - movq mm7, [edi+ebx+56] // Load Sub(x) for 8th 8 bytes - movq [edi+ebx+48], mm6 // Write Raw(x) for 7th 8 bytes - add ebx, 64 - paddb mm7, mm6 - cmp ebx, ecx - movq [edi+ebx-8], mm7 // Write Raw(x) for 8th 8 bytes - jb dsub8lp - cmp ebx, MMXLength - jnb dsub8lt8 -dsub8lpA: - movq mm0, [edi+ebx] - add ebx, 8 - paddb mm0, mm7 - cmp ebx, MMXLength - movq [edi+ebx-8], mm0 // use -8 to offset early add to ebx - movq mm7, mm0 // Move calculated Raw(x) data to mm1 to - // be the new Raw(x-bpp) for the next loop - jb dsub8lpA -dsub8lt8: - } // end _asm block - } - break; - - default: // bpp greater than 8 bytes - { - _asm { - mov ebx, diff - mov edi, row - mov esi, edi // lp = row - add edi, bpp // rp = row + bpp -dsubAlp: - movq mm0, [edi+ebx] - movq mm1, [esi+ebx] - add ebx, 8 - paddb mm0, mm1 - cmp ebx, MMXLength - movq [edi+ebx-8], mm0 // mov does not affect flags; -8 to offset - // add ebx - jb dsubAlp - } // end _asm block - } - break; - - } // end switch ( bpp ) - - _asm { - mov ebx, MMXLength - mov edi, row - cmp ebx, FullLength - jnb dsubend - mov esi, edi // lp = row - xor eax, eax - add edi, bpp // rp = row + bpp -dsublp2: - mov al, [esi+ebx] - add [edi+ebx], al - inc ebx - cmp ebx, FullLength - jb dsublp2 -dsubend: - emms // End MMX instructions; prep for possible FP instrs. - } // end _asm block -} - -// Optimized code for PNG Up filter decoder -void /* PRIVATE */ -png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row, - png_bytep prev_row) -{ - png_uint_32 len; - len = row_info->rowbytes; // # of bytes to filter - _asm { - mov edi, row - // get # of bytes to alignment - mov ecx, edi - xor ebx, ebx - add ecx, 0x7 - xor eax, eax - and ecx, 0xfffffff8 - mov esi, prev_row - sub ecx, edi - jz dupgo - // fix alignment -duplp1: - mov al, [edi+ebx] - add al, [esi+ebx] - inc ebx - cmp ebx, ecx - mov [edi + ebx-1], al // mov does not affect flags; -1 to offset inc ebx - jb duplp1 -dupgo: - mov ecx, len - mov edx, ecx - sub edx, ebx // subtract alignment fix - and edx, 0x0000003f // calc bytes over mult of 64 - sub ecx, edx // drop over bytes from length - // Unrolled loop - use all MMX registers and interleave to reduce - // number of branch instructions (loops) and reduce partial stalls -duploop: - movq mm1, [esi+ebx] - movq mm0, [edi+ebx] - movq mm3, [esi+ebx+8] - paddb mm0, mm1 - movq mm2, [edi+ebx+8] - movq [edi+ebx], mm0 - paddb mm2, mm3 - movq mm5, [esi+ebx+16] - movq [edi+ebx+8], mm2 - movq mm4, [edi+ebx+16] - movq mm7, [esi+ebx+24] - paddb mm4, mm5 - movq mm6, [edi+ebx+24] - movq [edi+ebx+16], mm4 - paddb mm6, mm7 - movq mm1, [esi+ebx+32] - movq [edi+ebx+24], mm6 - movq mm0, [edi+ebx+32] - movq mm3, [esi+ebx+40] - paddb mm0, mm1 - movq mm2, [edi+ebx+40] - movq [edi+ebx+32], mm0 - paddb mm2, mm3 - movq mm5, [esi+ebx+48] - movq [edi+ebx+40], mm2 - movq mm4, [edi+ebx+48] - movq mm7, [esi+ebx+56] - paddb mm4, mm5 - movq mm6, [edi+ebx+56] - movq [edi+ebx+48], mm4 - add ebx, 64 - paddb mm6, mm7 - cmp ebx, ecx - movq [edi+ebx-8], mm6 // (+56)movq does not affect flags; - // -8 to offset add ebx - jb duploop - - cmp edx, 0 // Test for bytes over mult of 64 - jz dupend - - - // 2 lines added by lcreeve@netins.net - // (mail 11 Jul 98 in png-implement list) - cmp edx, 8 //test for less than 8 bytes - jb duplt8 - - - add ecx, edx - and edx, 0x00000007 // calc bytes over mult of 8 - sub ecx, edx // drop over bytes from length - jz duplt8 - // Loop using MMX registers mm0 & mm1 to update 8 bytes simultaneously -duplpA: - movq mm1, [esi+ebx] - movq mm0, [edi+ebx] - add ebx, 8 - paddb mm0, mm1 - cmp ebx, ecx - movq [edi+ebx-8], mm0 // movq does not affect flags; -8 to offset add ebx - jb duplpA - cmp edx, 0 // Test for bytes over mult of 8 - jz dupend -duplt8: - xor eax, eax - add ecx, edx // move over byte count into counter - // Loop using x86 registers to update remaining bytes -duplp2: - mov al, [edi + ebx] - add al, [esi + ebx] - inc ebx - cmp ebx, ecx - mov [edi + ebx-1], al // mov does not affect flags; -1 to offset inc ebx - jb duplp2 -dupend: - // Conversion of filtered row completed - emms // End MMX instructions; prep for possible FP instrs. - } // end _asm block -} - - -// Optimized png_read_filter_row routines -void /* PRIVATE */ -png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep - row, png_bytep prev_row, int filter) -{ -#ifdef PNG_DEBUG - char filnm[10]; -#endif - - if (mmx_supported == 2) { - png_mmx_support(); - } - -#ifdef PNG_DEBUG - png_debug(1, "in png_read_filter_row\n"); - switch (filter) - { - case 0: sprintf(filnm, "none"); - break; - case 1: sprintf(filnm, "sub-%s", "MMX"); - break; - case 2: sprintf(filnm, "up-%s", "MMX"); - break; - case 3: sprintf(filnm, "avg-%s", "MMX"); - break; - case 4: sprintf(filnm, "Paeth-%s", "MMX"); - break; - default: sprintf(filnm, "unknw"); - break; - } - png_debug2(0,"row=%5d, %s, ", png_ptr->row_number, filnm); - png_debug2(0, "pd=%2d, b=%d, ", (int)row_info->pixel_depth, - (int)((row_info->pixel_depth + 7) >> 3)); - png_debug1(0,"len=%8d, ", row_info->rowbytes); -#endif /* PNG_DEBUG */ - - switch (filter) - { - case PNG_FILTER_VALUE_NONE: - break; - - case PNG_FILTER_VALUE_SUB: - { - if ( - (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && - (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) - { - png_read_filter_row_mmx_sub(row_info, row); - } - else - { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_bytep rp = row + bpp; - png_bytep lp = row; - - for (i = bpp; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff); - rp++; - } - } - break; - } - - case PNG_FILTER_VALUE_UP: - { - if ( - (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && - (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) - { - png_read_filter_row_mmx_up(row_info, row, prev_row); - } - else - { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_bytep rp = row; - png_bytep pp = prev_row; - - for (i = 0; i < istop; ++i) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); - rp++; - } - } - break; - } - - case PNG_FILTER_VALUE_AVG: - { - if ( - (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && - (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) - { - png_read_filter_row_mmx_avg(row_info, row, prev_row); - } - else - { - png_uint_32 i; - png_bytep rp = row; - png_bytep pp = prev_row; - png_bytep lp = row; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_uint_32 istop = row_info->rowbytes - bpp; - - for (i = 0; i < bpp; i++) - { - *rp = (png_byte)(((int)(*rp) + - ((int)(*pp++) >> 1)) & 0xff); - rp++; - } - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + - ((int)(*pp++ + *lp++) >> 1)) & 0xff); - rp++; - } - } - break; - } - - case PNG_FILTER_VALUE_PAETH: - { - if ( - (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && - (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) - { - png_read_filter_row_mmx_paeth(row_info, row, prev_row); - } - else - { - png_uint_32 i; - png_bytep rp = row; - png_bytep pp = prev_row; - png_bytep lp = row; - png_bytep cp = prev_row; - png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; - png_uint_32 istop=row_info->rowbytes - bpp; - - for (i = 0; i < bpp; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); - rp++; - } - - for (i = 0; i < istop; i++) // use leftover rp,pp - { - int a, b, c, pa, pb, pc, p; - - a = *lp++; - b = *pp++; - c = *cp++; - - p = b - c; - pc = a - c; - -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - - /* - if (pa <= pb && pa <= pc) - p = a; - else if (pb <= pc) - p = b; - else - p = c; - */ - - p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; - - *rp = (png_byte)(((int)(*rp) + p) & 0xff); - rp++; - } - } - break; - } - - default: - png_warning(png_ptr, "Ignoring bad row filter type"); - *row=0; - break; - } -} - -#endif /* PNG_ASSEMBLER_CODE_SUPPORTED && PNG_USE_PNGVCRD */ diff --git a/libraries/libpng-1.0.9/pngwio.c b/libraries/libpng-1.0.9/pngwio.c deleted file mode 100644 index 0367cef..0000000 --- a/libraries/libpng-1.0.9/pngwio.c +++ /dev/null @@ -1,226 +0,0 @@ - -/* pngwio.c - functions for data output - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This file provides a location for all output. Users who need - * special handling are expected to write functions that have the same - * arguments as these and perform similar functions, but that possibly - * use different output methods. Note that you shouldn't change these - * functions, but rather write replacement functions and then change - * them at run time with png_set_write_fn(...). - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Write the data to whatever output you are using. The default routine - writes to a file pointer. Note that this routine sometimes gets called - with very small lengths, so you should implement some kind of simple - buffering if you are using unbuffered writes. This should never be asked - to write more than 64K on a 16 bit machine. */ - -void /* PRIVATE */ -png_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - if (png_ptr->write_data_fn != NULL ) - (*(png_ptr->write_data_fn))(png_ptr, data, length); - else - png_error(png_ptr, "Call to NULL write function"); -} - -#if !defined(PNG_NO_STDIO) -/* This is the function that does the actual writing of data. If you are - not writing to a standard C stream, you should create a replacement - write_data function and use it at run time with png_set_write_fn(), rather - than changing the library. */ -#ifndef USE_FAR_KEYWORD -static void /* PRIVATE */ -png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_uint_32 check; - -#if defined(_WIN32_WCE) - if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) ) - check = 0; -#else - check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr)); -#endif - if (check != length) - png_error(png_ptr, "Write Error"); -} -#else -/* this is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void /* PRIVATE */ -png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_uint_32 check; - png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */ - png_FILE_p io_ptr; - - /* Check if data really is near. If so, use usual code. */ - near_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); - if ((png_bytep)near_data == data) - { -#if defined(_WIN32_WCE) - if ( !WriteFile(io_ptr, near_data, length, &check, NULL) ) - check = 0; -#else - check = fwrite(near_data, 1, length, io_ptr); -#endif - } - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t written, remaining, err; - check = 0; - remaining = length; - do - { - written = MIN(NEAR_BUF_SIZE, remaining); - png_memcpy(buf, data, written); /* copy far buffer to near buffer */ -#if defined(_WIN32_WCE) - if ( !WriteFile(io_ptr, buf, written, &err, NULL) ) - err = 0; -#else - err = fwrite(buf, 1, written, io_ptr); -#endif - if (err != written) - break; - else - check += err; - data += written; - remaining -= written; - } - while (remaining != 0); - } - if (check != length) - png_error(png_ptr, "Write Error"); -} - -#endif -#endif - -/* This function is called to output any data pending writing (normally - to disk). After png_flush is called, there should be no data pending - writing in any buffers. */ -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -void /* PRIVATE */ -png_flush(png_structp png_ptr) -{ - if (png_ptr->output_flush_fn != NULL) - (*(png_ptr->output_flush_fn))(png_ptr); -} - -#if !defined(PNG_NO_STDIO) -static void /* PRIVATE */ -png_default_flush(png_structp png_ptr) -{ -#if !defined(_WIN32_WCE) - png_FILE_p io_ptr; - io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr)); - if (io_ptr != NULL) - fflush(io_ptr); -#endif -} -#endif -#endif - -/* This function allows the application to supply new output functions for - libpng if standard C streams aren't being used. - - This function takes as its arguments: - png_ptr - pointer to a png output data structure - io_ptr - pointer to user supplied structure containing info about - the output functions. May be NULL. - write_data_fn - pointer to a new output function that takes as its - arguments a pointer to a png_struct, a pointer to - data to be written, and a 32-bit unsigned int that is - the number of bytes to be written. The new write - function should call png_error(png_ptr, "Error msg") - to exit and output any fatal error messages. - flush_data_fn - pointer to a new flush function that takes as its - arguments a pointer to a png_struct. After a call to - the flush function, there should be no data in any buffers - or pending transmission. If the output method doesn't do - any buffering of ouput, a function prototype must still be - supplied although it doesn't have to do anything. If - PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile - time, output_flush_fn will be ignored, although it must be - supplied for compatibility. */ -void PNGAPI -png_set_write_fn(png_structp png_ptr, png_voidp io_ptr, - png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn) -{ - png_ptr->io_ptr = io_ptr; - -#if !defined(PNG_NO_STDIO) - if (write_data_fn != NULL) - png_ptr->write_data_fn = write_data_fn; - else - png_ptr->write_data_fn = png_default_write_data; -#else - png_ptr->write_data_fn = write_data_fn; -#endif - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -#if !defined(PNG_NO_STDIO) - if (output_flush_fn != NULL) - png_ptr->output_flush_fn = output_flush_fn; - else - png_ptr->output_flush_fn = png_default_flush; -#else - png_ptr->output_flush_fn = output_flush_fn; -#endif -#endif /* PNG_WRITE_FLUSH_SUPPORTED */ - - /* It is an error to read while writing a png file */ - if (png_ptr->read_data_fn != NULL) - { - png_ptr->read_data_fn = NULL; - png_warning(png_ptr, - "Attempted to set both read_data_fn and write_data_fn in"); - png_warning(png_ptr, - "the same structure. Resetting read_data_fn to NULL."); - } -} - -#if defined(USE_FAR_KEYWORD) -#if defined(_MSC_VER) -void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check) -{ - void *near_ptr; - void FAR *far_ptr; - FP_OFF(near_ptr) = FP_OFF(ptr); - far_ptr = (void FAR *)near_ptr; - if(check != 0) - if(FP_SEG(ptr) != FP_SEG(far_ptr)) - png_error(png_ptr,"segment lost in conversion"); - return(near_ptr); -} -# else -void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check) -{ - void *near_ptr; - void FAR *far_ptr; - near_ptr = (void FAR *)ptr; - far_ptr = (void FAR *)near_ptr; - if(check != 0) - if(far_ptr != ptr) - png_error(png_ptr,"segment lost in conversion"); - return(near_ptr); -} -# endif -# endif diff --git a/libraries/libpng-1.0.9/pngwrite.c b/libraries/libpng-1.0.9/pngwrite.c deleted file mode 100644 index 8d5a796..0000000 --- a/libraries/libpng-1.0.9/pngwrite.c +++ /dev/null @@ -1,1365 +0,0 @@ - -/* pngwrite.c - general routines to write a PNG file - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - */ - -/* get internal access to png.h */ -#define PNG_INTERNAL -#include "png.h" - -/* Writes all the PNG information. This is the suggested way to use the - * library. If you have a new chunk to add, make a function to write it, - * and put it in the correct location here. If you want the chunk written - * after the image data, put it in png_write_end(). I strongly encourage - * you to supply a PNG_INFO_ flag, and check info_ptr->valid before writing - * the chunk, as that will keep the code from breaking if you want to just - * write a plain PNG file. If you have long comments, I suggest writing - * them in png_write_end(), and compressing them. - */ -void PNGAPI -png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_write_info_before_PLTE\n"); - if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) - { - png_write_sig(png_ptr); /* write PNG signature */ -#if defined(PNG_MNG_FEATURES_SUPPORTED) - if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted)) - { - png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n"); - png_ptr->mng_features_permitted=0; - } -#endif - /* write IHDR information. */ - png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height, - info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type, - info_ptr->filter_type, -#if defined(PNG_WRITE_INTERLACING_SUPPORTED) - info_ptr->interlace_type); -#else - 0); -#endif - /* the rest of these check to see if the valid field has the appropriate - flag set, and if it does, writes the chunk. */ -#if defined(PNG_WRITE_gAMA_SUPPORTED) - if (info_ptr->valid & PNG_INFO_gAMA) - { -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_write_gAMA(png_ptr, info_ptr->gamma); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - png_write_gAMA_fixed(png_ptr, info_ptr->int_gamma); -# endif -#endif - } -#endif -#if defined(PNG_WRITE_sRGB_SUPPORTED) - if (info_ptr->valid & PNG_INFO_sRGB) - png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent); -#endif -#if defined(PNG_WRITE_iCCP_SUPPORTED) - if (info_ptr->valid & PNG_INFO_iCCP) - png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE, - info_ptr->iccp_profile, (int)info_ptr->iccp_proflen); -#endif -#if defined(PNG_WRITE_sBIT_SUPPORTED) - if (info_ptr->valid & PNG_INFO_sBIT) - png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type); -#endif -#if defined(PNG_WRITE_cHRM_SUPPORTED) - if (info_ptr->valid & PNG_INFO_cHRM) - { -#ifdef PNG_FLOATING_POINT_SUPPORTED - png_write_cHRM(png_ptr, - info_ptr->x_white, info_ptr->y_white, - info_ptr->x_red, info_ptr->y_red, - info_ptr->x_green, info_ptr->y_green, - info_ptr->x_blue, info_ptr->y_blue); -#else -# ifdef PNG_FIXED_POINT_SUPPORTED - png_write_cHRM_fixed(png_ptr, - info_ptr->int_x_white, info_ptr->int_y_white, - info_ptr->int_x_red, info_ptr->int_y_red, - info_ptr->int_x_green, info_ptr->int_y_green, - info_ptr->int_x_blue, info_ptr->int_y_blue); -# endif -#endif - } -#endif -#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) - if (info_ptr->unknown_chunks_num) - { - png_unknown_chunk *up; - - png_debug(5, "writing extra chunks\n"); - - for (up = info_ptr->unknown_chunks; - up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; - up++) - { - int keep=png_handle_as_unknown(png_ptr, up->name); - if (keep != HANDLE_CHUNK_NEVER && - up->location && (!(up->location & PNG_HAVE_PLTE)) && - ((up->name[3] & 0x20) || keep == HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) - { - png_write_chunk(png_ptr, up->name, up->data, up->size); - } - } - } -#endif - png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE; - } -} - -void PNGAPI -png_write_info(png_structp png_ptr, png_infop info_ptr) -{ -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) - int i; -#endif - - png_debug(1, "in png_write_info\n"); - - png_write_info_before_PLTE(png_ptr, info_ptr); - - if (info_ptr->valid & PNG_INFO_PLTE) - png_write_PLTE(png_ptr, info_ptr->palette, - (png_uint_32)info_ptr->num_palette); - else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - png_error(png_ptr, "Valid palette required for paletted images\n"); - -#if defined(PNG_WRITE_tRNS_SUPPORTED) - if (info_ptr->valid & PNG_INFO_tRNS) - { -#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) - /* invert the alpha channel (in tRNS) */ - if ((png_ptr->transformations & PNG_INVERT_ALPHA) && - info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - int j; - for (j=0; j<(int)info_ptr->num_trans; j++) - info_ptr->trans[j] = (png_byte)(255 - info_ptr->trans[j]); - } -#endif - png_write_tRNS(png_ptr, info_ptr->trans, &(info_ptr->trans_values), - info_ptr->num_trans, info_ptr->color_type); - } -#endif -#if defined(PNG_WRITE_bKGD_SUPPORTED) - if (info_ptr->valid & PNG_INFO_bKGD) - png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type); -#endif -#if defined(PNG_WRITE_hIST_SUPPORTED) - if (info_ptr->valid & PNG_INFO_hIST) - png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette); -#endif -#if defined(PNG_WRITE_oFFs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_oFFs) - png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset, - info_ptr->offset_unit_type); -#endif -#if defined(PNG_WRITE_pCAL_SUPPORTED) - if (info_ptr->valid & PNG_INFO_pCAL) - png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0, - info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams, - info_ptr->pcal_units, info_ptr->pcal_params); -#endif -#if defined(PNG_WRITE_sCAL_SUPPORTED) - if (info_ptr->valid & PNG_INFO_sCAL) -#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO) - png_write_sCAL(png_ptr, (int)info_ptr->scal_unit, - info_ptr->scal_pixel_width, info_ptr->scal_pixel_height); -#else -#ifdef PNG_FIXED_POINT_SUPPORTED - png_write_sCAL_s(png_ptr, (int)info_ptr->scal_unit, - info_ptr->scal_s_width, info_ptr->scal_s_height); -#else - png_warning(png_ptr, - "png_write_sCAL not supported; sCAL chunk not written.\n"); -#endif -#endif -#endif -#if defined(PNG_WRITE_pHYs_SUPPORTED) - if (info_ptr->valid & PNG_INFO_pHYs) - png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit, - info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type); -#endif -#if defined(PNG_WRITE_tIME_SUPPORTED) - if (info_ptr->valid & PNG_INFO_tIME) - { - png_write_tIME(png_ptr, &(info_ptr->mod_time)); - png_ptr->mode |= PNG_WROTE_tIME; - } -#endif -#if defined(PNG_WRITE_sPLT_SUPPORTED) - if (info_ptr->valid & PNG_INFO_sPLT) - for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) - png_write_sPLT(png_ptr, info_ptr->splt_palettes + i); -#endif -#if defined(PNG_WRITE_TEXT_SUPPORTED) - /* Check to see if we need to write text chunks */ - for (i = 0; i < info_ptr->num_text; i++) - { - png_debug2(2, "Writing header text chunk %d, type %d\n", i, - info_ptr->text[i].compression); - /* an internationalized chunk? */ - if (info_ptr->text[i].compression > 0) - { -#if defined(PNG_WRITE_iTXt_SUPPORTED) - /* write international chunk */ - png_write_iTXt(png_ptr, - info_ptr->text[i].compression, - info_ptr->text[i].key, - info_ptr->text[i].lang, - info_ptr->text[i].lang_key, - info_ptr->text[i].text); -#else - png_warning(png_ptr, "Unable to write international text\n"); -#endif - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; - } - /* If we want a compressed text chunk */ - else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt) - { -#if defined(PNG_WRITE_zTXt_SUPPORTED) - /* write compressed chunk */ - png_write_zTXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0, - info_ptr->text[i].compression); -#else - png_warning(png_ptr, "Unable to write compressed text\n"); -#endif - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; - } - else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) - { -#if defined(PNG_WRITE_tEXt_SUPPORTED) - /* write uncompressed chunk */ - png_write_tEXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, - 0); -#else - png_warning(png_ptr, "Unable to write uncompressed text\n"); -#endif - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; - } - } -#endif -#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) - if (info_ptr->unknown_chunks_num) - { - png_unknown_chunk *up; - - png_debug(5, "writing extra chunks\n"); - - for (up = info_ptr->unknown_chunks; - up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; - up++) - { - int keep=png_handle_as_unknown(png_ptr, up->name); - if (keep != HANDLE_CHUNK_NEVER && - up->location && (up->location & PNG_HAVE_PLTE) && - !(up->location & PNG_HAVE_IDAT) && - ((up->name[3] & 0x20) || keep == HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) - { - png_write_chunk(png_ptr, up->name, up->data, up->size); - } - } - } -#endif -} - -/* Writes the end of the PNG file. If you don't want to write comments or - * time information, you can pass NULL for info. If you already wrote these - * in png_write_info(), do not write them again here. If you have long - * comments, I suggest writing them here, and compressing them. - */ -void PNGAPI -png_write_end(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_write_end\n"); - if (!(png_ptr->mode & PNG_HAVE_IDAT)) - png_error(png_ptr, "No IDATs written into file"); - - /* see if user wants us to write information chunks */ - if (info_ptr != NULL) - { -#if defined(PNG_WRITE_TEXT_SUPPORTED) - int i; /* local index variable */ -#endif -#if defined(PNG_WRITE_tIME_SUPPORTED) - /* check to see if user has supplied a time chunk */ - if ((info_ptr->valid & PNG_INFO_tIME) && - !(png_ptr->mode & PNG_WROTE_tIME)) - png_write_tIME(png_ptr, &(info_ptr->mod_time)); -#endif -#if defined(PNG_WRITE_TEXT_SUPPORTED) - /* loop through comment chunks */ - for (i = 0; i < info_ptr->num_text; i++) - { - png_debug2(2, "Writing trailer text chunk %d, type %d\n", i, - info_ptr->text[i].compression); - /* an internationalized chunk? */ - if (info_ptr->text[i].compression > 0) - { -#if defined(PNG_WRITE_iTXt_SUPPORTED) - /* write international chunk */ - png_write_iTXt(png_ptr, - info_ptr->text[i].compression, - info_ptr->text[i].key, - info_ptr->text[i].lang, - info_ptr->text[i].lang_key, - info_ptr->text[i].text); -#else - png_warning(png_ptr, "Unable to write international text\n"); -#endif - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; - } - else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt) - { -#if defined(PNG_WRITE_zTXt_SUPPORTED) - /* write compressed chunk */ - png_write_zTXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0, - info_ptr->text[i].compression); -#else - png_warning(png_ptr, "Unable to write compressed text\n"); -#endif - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; - } - else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) - { -#if defined(PNG_WRITE_tEXt_SUPPORTED) - /* write uncompressed chunk */ - png_write_tEXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0); -#else - png_warning(png_ptr, "Unable to write uncompressed text\n"); -#endif - - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; - } - } -#endif -#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) - if (info_ptr->unknown_chunks_num) - { - png_unknown_chunk *up; - - png_debug(5, "writing extra chunks\n"); - - for (up = info_ptr->unknown_chunks; - up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; - up++) - { - int keep=png_handle_as_unknown(png_ptr, up->name); - if (keep != HANDLE_CHUNK_NEVER && - up->location && (up->location & PNG_AFTER_IDAT) && - ((up->name[3] & 0x20) || keep == HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) - { - png_write_chunk(png_ptr, up->name, up->data, up->size); - } - } - } -#endif - } - - png_ptr->mode |= PNG_AFTER_IDAT; - - /* write end of PNG file */ - png_write_IEND(png_ptr); -#if 0 -/* This flush, added in libpng-1.0.8, causes some applications to crash - because they do not set png_ptr->output_flush_fn */ - png_flush(png_ptr); -#endif -} - -#if defined(PNG_WRITE_tIME_SUPPORTED) -#if !defined(_WIN32_WCE) -/* "time.h" functions are not supported on WindowsCE */ -void PNGAPI -png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime) -{ - png_debug(1, "in png_convert_from_struct_tm\n"); - ptime->year = (png_uint_16)(1900 + ttime->tm_year); - ptime->month = (png_byte)(ttime->tm_mon + 1); - ptime->day = (png_byte)ttime->tm_mday; - ptime->hour = (png_byte)ttime->tm_hour; - ptime->minute = (png_byte)ttime->tm_min; - ptime->second = (png_byte)ttime->tm_sec; -} - -void PNGAPI -png_convert_from_time_t(png_timep ptime, time_t ttime) -{ - struct tm *tbuf; - - png_debug(1, "in png_convert_from_time_t\n"); - tbuf = gmtime(&ttime); - png_convert_from_struct_tm(ptime, tbuf); -} -#endif -#endif - -/* Initialize png_ptr structure, and allocate any memory needed */ -png_structp PNGAPI -png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn) -{ -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); -} - -/* Alternate initialize png_ptr structure, and allocate any memory needed */ -png_structp PNGAPI -png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - png_structp png_ptr; -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf jmpbuf; -#endif -#endif - int i; - png_debug(1, "in png_create_write_struct\n"); -#ifdef PNG_USER_MEM_SUPPORTED - if ((png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - (png_malloc_ptr)malloc_fn)) == NULL) -#else - if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL) -#endif /* PNG_USER_MEM_SUPPORTED */ - { - return ((png_structp)NULL); - } - -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) -#else - if (setjmp(png_ptr->jmpbuf)) -#endif - { - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf=NULL; - png_destroy_struct(png_ptr); - return ((png_structp)NULL); - } -#ifdef USE_FAR_KEYWORD - png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf)); -#endif -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); -#endif /* PNG_USER_MEM_SUPPORTED */ - png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - - i=0; - do - { - if(user_png_ver[i] != png_libpng_ver[i]) - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; - } while (png_libpng_ver[i++]); - - if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) - { - /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so - * we must recompile any applications that use any older library version. - * For versions after libpng 1.0, we will be compatible, so we need - * only check the first digit. - */ - if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || - (user_png_ver[0] == '0' && user_png_ver[2] < '9')) - { - png_error(png_ptr, - "Incompatible libpng version in application and library"); - } - - /* Libpng 1.0.6 was not binary compatible, due to insertion of the - info_ptr->free_me member. Note to maintainer: this test can be - removed from version 2.0.0 and beyond because the previous test - would have already rejected it. */ - - if (user_png_ver[4] == '6' && user_png_ver[2] == '0' && - user_png_ver[0] == '1' && user_png_ver[5] == '\0') - { - png_error(png_ptr, - "Application must be recompiled; version 1.0.6 was incompatible"); - } - } - - /* initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, - (png_uint_32)png_ptr->zbuf_size); - - png_set_write_fn(png_ptr, NULL, NULL, NULL); - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT, - 1, NULL, NULL); -#endif - - return ((png_structp)png_ptr); -} - -/* Initialize png_ptr structure, and allocate any memory needed */ -#undef png_write_init -void PNGAPI -png_write_init(png_structp png_ptr) -{ - /* We only come here via pre-1.0.7-compiled applications */ - png_write_init_2(png_ptr, "1.0.0", 10000, 10000); -} - -void PNGAPI -png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver, - png_size_t png_struct_size, png_size_t png_info_size) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; /* to save current jump buffer */ -#endif - int i = 0; - do - { - if (user_png_ver[i] != png_libpng_ver[i]) - { -#ifdef PNG_LEGACY_SUPPORTED - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; -#else - png_ptr->error_fn=(png_error_ptr)NULL; - png_error(png_ptr, - "Application uses deprecated png_write_init() and must be recompiled."); -#endif - } - } while (png_libpng_ver[i++]); - - if (sizeof(png_struct) > png_struct_size || - sizeof(png_info) > png_info_size) - { - png_ptr->error_fn=(png_error_ptr)NULL; - png_error(png_ptr, - "Application and library have different sized structs. Please recompile."); - } - - png_debug(1, "in png_write_init_2\n"); - -#ifdef PNG_SETJMP_SUPPORTED - /* save jump buffer and error functions */ - png_memcpy(tmp_jmp, png_ptr->jmpbuf, sizeof (jmp_buf)); -#endif - - /* reset all variables to 0 */ - png_memset(png_ptr, 0, sizeof (png_struct)); - -#ifdef PNG_SETJMP_SUPPORTED - /* restore jump buffer */ - png_memcpy(png_ptr->jmpbuf, tmp_jmp, sizeof (jmp_buf)); -#endif - - /* initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, - (png_uint_32)png_ptr->zbuf_size); - png_set_write_fn(png_ptr, NULL, NULL, NULL); - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT, - 1, NULL, NULL); -#endif -} - -/* Write a few rows of image data. If the image is interlaced, - * either you will have to write the 7 sub images, or, if you - * have called png_set_interlace_handling(), you will have to - * "write" the image seven times. - */ -void PNGAPI -png_write_rows(png_structp png_ptr, png_bytepp row, - png_uint_32 num_rows) -{ - png_uint_32 i; /* row counter */ - png_bytepp rp; /* row pointer */ - - png_debug(1, "in png_write_rows\n"); - /* loop through the rows */ - for (i = 0, rp = row; i < num_rows; i++, rp++) - { - png_write_row(png_ptr, *rp); - } -} - -/* Write the image. You only need to call this function once, even - * if you are writing an interlaced image. - */ -void PNGAPI -png_write_image(png_structp png_ptr, png_bytepp image) -{ - png_uint_32 i; /* row index */ - int pass, num_pass; /* pass variables */ - png_bytepp rp; /* points to current row */ - - png_debug(1, "in png_write_image\n"); -#if defined(PNG_WRITE_INTERLACING_SUPPORTED) - /* intialize interlace handling. If image is not interlaced, - this will set pass to 1 */ - num_pass = png_set_interlace_handling(png_ptr); -#else - num_pass = 1; -#endif - /* loop through passes */ - for (pass = 0; pass < num_pass; pass++) - { - /* loop through image */ - for (i = 0, rp = image; i < png_ptr->height; i++, rp++) - { - png_write_row(png_ptr, *rp); - } - } -} - -/* called by user to write a row of image data */ -void PNGAPI -png_write_row(png_structp png_ptr, png_bytep row) -{ - png_debug2(1, "in png_write_row (row %ld, pass %d)\n", - png_ptr->row_number, png_ptr->pass); - /* initialize transformations and other stuff if first time */ - if (png_ptr->row_number == 0 && png_ptr->pass == 0) - { - /* check for transforms that have been set but were defined out */ -#if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) - png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined."); -#endif -#if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) - png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined."); -#endif -#if !defined(PNG_WRITE_PACKSWAP_SUPPORTED) && defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - png_warning(png_ptr, "PNG_WRITE_PACKSWAP_SUPPORTED is not defined."); -#endif -#if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) - png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined."); -#endif -#if !defined(PNG_WRITE_SHIFT_SUPPORTED) && defined(PNG_READ_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) - png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined."); -#endif -#if !defined(PNG_WRITE_BGR_SUPPORTED) && defined(PNG_READ_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) - png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined."); -#endif -#if !defined(PNG_WRITE_SWAP_SUPPORTED) && defined(PNG_READ_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined."); -#endif - - png_write_start_row(png_ptr); - } - -#if defined(PNG_WRITE_INTERLACING_SUPPORTED) - /* if interlaced and not interested in row, return */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) - { - switch (png_ptr->pass) - { - case 0: - if (png_ptr->row_number & 0x07) - { - png_write_finish_row(png_ptr); - return; - } - break; - case 1: - if ((png_ptr->row_number & 0x07) || png_ptr->width < 5) - { - png_write_finish_row(png_ptr); - return; - } - break; - case 2: - if ((png_ptr->row_number & 0x07) != 4) - { - png_write_finish_row(png_ptr); - return; - } - break; - case 3: - if ((png_ptr->row_number & 0x03) || png_ptr->width < 3) - { - png_write_finish_row(png_ptr); - return; - } - break; - case 4: - if ((png_ptr->row_number & 0x03) != 2) - { - png_write_finish_row(png_ptr); - return; - } - break; - case 5: - if ((png_ptr->row_number & 0x01) || png_ptr->width < 2) - { - png_write_finish_row(png_ptr); - return; - } - break; - case 6: - if (!(png_ptr->row_number & 0x01)) - { - png_write_finish_row(png_ptr); - return; - } - break; - } - } -#endif - - /* set up row info for transformations */ - png_ptr->row_info.color_type = png_ptr->color_type; - png_ptr->row_info.width = png_ptr->usr_width; - png_ptr->row_info.channels = png_ptr->usr_channels; - png_ptr->row_info.bit_depth = png_ptr->usr_bit_depth; - png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth * - png_ptr->row_info.channels); - - png_ptr->row_info.rowbytes = ((png_ptr->row_info.width * - (png_uint_32)png_ptr->row_info.pixel_depth + 7) >> 3); - - png_debug1(3, "row_info->color_type = %d\n", png_ptr->row_info.color_type); - png_debug1(3, "row_info->width = %lu\n", png_ptr->row_info.width); - png_debug1(3, "row_info->channels = %d\n", png_ptr->row_info.channels); - png_debug1(3, "row_info->bit_depth = %d\n", png_ptr->row_info.bit_depth); - png_debug1(3, "row_info->pixel_depth = %d\n", png_ptr->row_info.pixel_depth); - png_debug1(3, "row_info->rowbytes = %lu\n", png_ptr->row_info.rowbytes); - - /* Copy user's row into buffer, leaving room for filter byte. */ - png_memcpy_check(png_ptr, png_ptr->row_buf + 1, row, - png_ptr->row_info.rowbytes); - -#if defined(PNG_WRITE_INTERLACING_SUPPORTED) - /* handle interlacing */ - if (png_ptr->interlaced && png_ptr->pass < 6 && - (png_ptr->transformations & PNG_INTERLACE)) - { - png_do_write_interlace(&(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->pass); - /* this should always get caught above, but still ... */ - if (!(png_ptr->row_info.width)) - { - png_write_finish_row(png_ptr); - return; - } - } -#endif - - /* handle other transformations */ - if (png_ptr->transformations) - png_do_write_transformations(png_ptr); - -#if defined(PNG_MNG_FEATURES_SUPPORTED) - /* Write filter_method 64 (intrapixel differencing) only if - * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and - * 2. Libpng did not write a PNG signature (this filter_method is only - * used in PNG datastreams that are embedded in MNG datastreams) and - * 3. The application called png_permit_mng_features with a mask that - * included PNG_FLAG_MNG_FILTER_64 and - * 4. The filter_method is 64 and - * 5. The color_type is RGB or RGBA - */ - if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) - { - /* Intrapixel differencing */ - png_do_write_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1); - } -#endif - - /* Find a filter if necessary, filter the row and write it out. */ - png_write_find_filter(png_ptr, &(png_ptr->row_info)); - - if (png_ptr->write_row_fn != NULL) - (*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); -} - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -/* Set the automatic flush interval or 0 to turn flushing off */ -void PNGAPI -png_set_flush(png_structp png_ptr, int nrows) -{ - png_debug(1, "in png_set_flush\n"); - png_ptr->flush_dist = (nrows < 0 ? 0 : nrows); -} - -/* flush the current output buffers now */ -void PNGAPI -png_write_flush(png_structp png_ptr) -{ - int wrote_IDAT; - - png_debug(1, "in png_write_flush\n"); - /* We have already written out all of the data */ - if (png_ptr->row_number >= png_ptr->num_rows) - return; - - do - { - int ret; - - /* compress the data */ - ret = deflate(&png_ptr->zstream, Z_SYNC_FLUSH); - wrote_IDAT = 0; - - /* check for compression errors */ - if (ret != Z_OK) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - else - png_error(png_ptr, "zlib error"); - } - - if (!(png_ptr->zstream.avail_out)) - { - /* write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, - png_ptr->zbuf_size); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - wrote_IDAT = 1; - } - } while(wrote_IDAT == 1); - - /* If there is any data left to be output, write it into a new IDAT */ - if (png_ptr->zbuf_size != png_ptr->zstream.avail_out) - { - /* write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - png_ptr->flush_rows = 0; - png_flush(png_ptr); -} -#endif /* PNG_WRITE_FLUSH_SUPPORTED */ - -/* free all memory used by the write */ -void PNGAPI -png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) -{ - png_structp png_ptr = NULL; - png_infop info_ptr = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn = NULL; -#endif - - png_debug(1, "in png_destroy_write_struct\n"); - if (png_ptr_ptr != NULL) - { - png_ptr = *png_ptr_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif - } - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (info_ptr != NULL) - { - png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) - if (png_ptr->num_chunk_list) - { - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->chunk_list=NULL; - png_ptr->num_chunk_list=0; - } -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, free_fn); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = (png_infop)NULL; - } - - if (png_ptr != NULL) - { - png_write_destroy(png_ptr); -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, free_fn); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - *png_ptr_ptr = (png_structp)NULL; - } -} - - -/* Free any memory used in png_ptr struct (old method) */ -void PNGAPI -png_write_destroy(png_structp png_ptr) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; /* save jump buffer */ -#endif - png_error_ptr error_fn; - png_error_ptr warning_fn; - png_voidp error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn; -#endif - - png_debug(1, "in png_write_destroy\n"); - /* free any memory zlib uses */ - deflateEnd(&png_ptr->zstream); - - /* free our memory. png_free checks NULL for us. */ - png_free(png_ptr, png_ptr->zbuf); - png_free(png_ptr, png_ptr->row_buf); - png_free(png_ptr, png_ptr->prev_row); - png_free(png_ptr, png_ptr->sub_row); - png_free(png_ptr, png_ptr->up_row); - png_free(png_ptr, png_ptr->avg_row); - png_free(png_ptr, png_ptr->paeth_row); - -#if defined(PNG_TIME_RFC1123_SUPPORTED) - png_free(png_ptr, png_ptr->time_buffer); -#endif - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - png_free(png_ptr, png_ptr->prev_filters); - png_free(png_ptr, png_ptr->filter_weights); - png_free(png_ptr, png_ptr->inv_filter_weights); - png_free(png_ptr, png_ptr->filter_costs); - png_free(png_ptr, png_ptr->inv_filter_costs); -#endif - -#ifdef PNG_SETJMP_SUPPORTED - /* reset structure */ - png_memcpy(tmp_jmp, png_ptr->jmpbuf, sizeof (jmp_buf)); -#endif - - error_fn = png_ptr->error_fn; - warning_fn = png_ptr->warning_fn; - error_ptr = png_ptr->error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif - - png_memset(png_ptr, 0, sizeof (png_struct)); - - png_ptr->error_fn = error_fn; - png_ptr->warning_fn = warning_fn; - png_ptr->error_ptr = error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr->free_fn = free_fn; -#endif - -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->jmpbuf, tmp_jmp, sizeof (jmp_buf)); -#endif -} - -/* Allow the application to select one or more row filters to use. */ -void PNGAPI -png_set_filter(png_structp png_ptr, int method, int filters) -{ - png_debug(1, "in png_set_filter\n"); -#if defined(PNG_MNG_FEATURES_SUPPORTED) - if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (method == PNG_INTRAPIXEL_DIFFERENCING)) - method = PNG_FILTER_TYPE_BASE; -#endif - if (method == PNG_FILTER_TYPE_BASE) - { - switch (filters & (PNG_ALL_FILTERS | 0x07)) - { - case 5: - case 6: - case 7: png_warning(png_ptr, "Unknown row filter for method 0"); - case PNG_FILTER_VALUE_NONE: png_ptr->do_filter=PNG_FILTER_NONE; break; - case PNG_FILTER_VALUE_SUB: png_ptr->do_filter=PNG_FILTER_SUB; break; - case PNG_FILTER_VALUE_UP: png_ptr->do_filter=PNG_FILTER_UP; break; - case PNG_FILTER_VALUE_AVG: png_ptr->do_filter=PNG_FILTER_AVG; break; - case PNG_FILTER_VALUE_PAETH: png_ptr->do_filter=PNG_FILTER_PAETH;break; - default: png_ptr->do_filter = (png_byte)filters; break; - } - - /* If we have allocated the row_buf, this means we have already started - * with the image and we should have allocated all of the filter buffers - * that have been selected. If prev_row isn't already allocated, then - * it is too late to start using the filters that need it, since we - * will be missing the data in the previous row. If an application - * wants to start and stop using particular filters during compression, - * it should start out with all of the filters, and then add and - * remove them after the start of compression. - */ - if (png_ptr->row_buf != NULL) - { - if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL) - { - png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; - } - - if ((png_ptr->do_filter & PNG_FILTER_UP) && png_ptr->up_row == NULL) - { - if (png_ptr->prev_row == NULL) - { - png_warning(png_ptr, "Can't add Up filter after starting"); - png_ptr->do_filter &= ~PNG_FILTER_UP; - } - else - { - png_ptr->up_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; - } - } - - if ((png_ptr->do_filter & PNG_FILTER_AVG) && png_ptr->avg_row == NULL) - { - if (png_ptr->prev_row == NULL) - { - png_warning(png_ptr, "Can't add Average filter after starting"); - png_ptr->do_filter &= ~PNG_FILTER_AVG; - } - else - { - png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; - } - } - - if ((png_ptr->do_filter & PNG_FILTER_PAETH) && - png_ptr->paeth_row == NULL) - { - if (png_ptr->prev_row == NULL) - { - png_warning(png_ptr, "Can't add Paeth filter after starting"); - png_ptr->do_filter &= (png_byte)(~PNG_FILTER_PAETH); - } - else - { - png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; - } - } - - if (png_ptr->do_filter == PNG_NO_FILTERS) - png_ptr->do_filter = PNG_FILTER_NONE; - } - } - else - png_error(png_ptr, "Unknown custom filter method"); -} - -/* This allows us to influence the way in which libpng chooses the "best" - * filter for the current scanline. While the "minimum-sum-of-absolute- - * differences metric is relatively fast and effective, there is some - * question as to whether it can be improved upon by trying to keep the - * filtered data going to zlib more consistent, hopefully resulting in - * better compression. - */ -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* GRR 970116 */ -void PNGAPI -png_set_filter_heuristics(png_structp png_ptr, int heuristic_method, - int num_weights, png_doublep filter_weights, - png_doublep filter_costs) -{ - int i; - - png_debug(1, "in png_set_filter_heuristics\n"); - if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST) - { - png_warning(png_ptr, "Unknown filter heuristic method"); - return; - } - - if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT) - { - heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED; - } - - if (num_weights < 0 || filter_weights == NULL || - heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED) - { - num_weights = 0; - } - - png_ptr->num_prev_filters = (png_byte)num_weights; - png_ptr->heuristic_method = (png_byte)heuristic_method; - - if (num_weights > 0) - { - if (png_ptr->prev_filters == NULL) - { - png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(sizeof(png_byte) * num_weights)); - - /* To make sure that the weighting starts out fairly */ - for (i = 0; i < num_weights; i++) - { - png_ptr->prev_filters[i] = 255; - } - } - - if (png_ptr->filter_weights == NULL) - { - png_ptr->filter_weights = (png_uint_16p) png_malloc(png_ptr, - (png_uint_32)(sizeof(png_uint_16) * num_weights)); - - png_ptr->inv_filter_weights = (png_uint_16p) png_malloc(png_ptr, - (png_uint_32)(sizeof(png_uint_16) * num_weights)); - - for (i = 0; i < num_weights; i++) - { - png_ptr->inv_filter_weights[i] = - png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; - } - } - - for (i = 0; i < num_weights; i++) - { - if (filter_weights[i] < 0.0) - { - png_ptr->inv_filter_weights[i] = - png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; - } - else - { - png_ptr->inv_filter_weights[i] = - (png_uint_16)((double)PNG_WEIGHT_FACTOR*filter_weights[i]+0.5); - png_ptr->filter_weights[i] = - (png_uint_16)((double)PNG_WEIGHT_FACTOR/filter_weights[i]+0.5); - } - } - } - - /* If, in the future, there are other filter methods, this would - * need to be based on png_ptr->filter. - */ - if (png_ptr->filter_costs == NULL) - { - png_ptr->filter_costs = (png_uint_16p) png_malloc(png_ptr, - (png_uint_32)(sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); - - png_ptr->inv_filter_costs = (png_uint_16p) png_malloc(png_ptr, - (png_uint_32)(sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); - - for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) - { - png_ptr->inv_filter_costs[i] = - png_ptr->filter_costs[i] = PNG_COST_FACTOR; - } - } - - /* Here is where we set the relative costs of the different filters. We - * should take the desired compression level into account when setting - * the costs, so that Paeth, for instance, has a high relative cost at low - * compression levels, while it has a lower relative cost at higher - * compression settings. The filter types are in order of increasing - * relative cost, so it would be possible to do this with an algorithm. - */ - for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) - { - if (filter_costs == NULL || filter_costs[i] < 0.0) - { - png_ptr->inv_filter_costs[i] = - png_ptr->filter_costs[i] = PNG_COST_FACTOR; - } - else if (filter_costs[i] >= 1.0) - { - png_ptr->inv_filter_costs[i] = - (png_uint_16)((double)PNG_COST_FACTOR / filter_costs[i] + 0.5); - png_ptr->filter_costs[i] = - (png_uint_16)((double)PNG_COST_FACTOR * filter_costs[i] + 0.5); - } - } -} -#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ - -void PNGAPI -png_set_compression_level(png_structp png_ptr, int level) -{ - png_debug(1, "in png_set_compression_level\n"); - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL; - png_ptr->zlib_level = level; -} - -void PNGAPI -png_set_compression_mem_level(png_structp png_ptr, int mem_level) -{ - png_debug(1, "in png_set_compression_mem_level\n"); - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL; - png_ptr->zlib_mem_level = mem_level; -} - -void PNGAPI -png_set_compression_strategy(png_structp png_ptr, int strategy) -{ - png_debug(1, "in png_set_compression_strategy\n"); - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY; - png_ptr->zlib_strategy = strategy; -} - -void PNGAPI -png_set_compression_window_bits(png_structp png_ptr, int window_bits) -{ - if (window_bits > 15) - png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); - else if (window_bits < 8) - png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); -#ifndef WBITS_8_OK - /* avoid libpng bug with 256-byte windows */ - if (window_bits == 8) - { - png_warning(png_ptr, "Compression window is being reset to 512"); - window_bits=9; - } -#endif - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS; - png_ptr->zlib_window_bits = window_bits; -} - -void PNGAPI -png_set_compression_method(png_structp png_ptr, int method) -{ - png_debug(1, "in png_set_compression_method\n"); - if (method != 8) - png_warning(png_ptr, "Only compression method 8 is supported by PNG"); - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD; - png_ptr->zlib_method = method; -} - -void PNGAPI -png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn) -{ - png_ptr->write_row_fn = write_row_fn; -} - -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) -void PNGAPI -png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr - write_user_transform_fn) -{ - png_debug(1, "in png_set_write_user_transform_fn\n"); - png_ptr->transformations |= PNG_USER_TRANSFORM; - png_ptr->write_user_transform_fn = write_user_transform_fn; -} -#endif - - -#if defined(PNG_INFO_IMAGE_SUPPORTED) -void PNGAPI -png_write_png(png_structp png_ptr, png_infop info_ptr, - int transforms, voidp params) -{ -#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) - /* invert the alpha channel from opacity to transparency */ - if (transforms & PNG_TRANSFORM_INVERT_ALPHA) - png_set_invert_alpha(png_ptr); -#endif - - /* Write the file header information. */ - png_write_info(png_ptr, info_ptr); - - /* ------ these transformations don't touch the info structure ------- */ - -#if defined(PNG_WRITE_INVERT_SUPPORTED) - /* invert monochrome pixels */ - if (transforms & PNG_TRANSFORM_INVERT_MONO) - png_set_invert_mono(png_ptr); -#endif - -#if defined(PNG_WRITE_SHIFT_SUPPORTED) - /* Shift the pixels up to a legal bit depth and fill in - * as appropriate to correctly scale the image. - */ - if ((transforms & PNG_TRANSFORM_SHIFT) - && (info_ptr->valid & PNG_INFO_sBIT)) - png_set_shift(png_ptr, &info_ptr->sig_bit); -#endif - -#if defined(PNG_WRITE_PACK_SUPPORTED) - /* pack pixels into bytes */ - if (transforms & PNG_TRANSFORM_PACKING) - png_set_packing(png_ptr); -#endif - -#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) - /* swap location of alpha bytes from ARGB to RGBA */ - if (transforms & PNG_TRANSFORM_SWAP_ALPHA) - png_set_swap_alpha(png_ptr); -#endif - -#if defined(PNG_WRITE_FILLER_SUPPORTED) - /* Get rid of filler (OR ALPHA) bytes, pack XRGB/RGBX/ARGB/RGBA into - * RGB (4 channels -> 3 channels). The second parameter is not used. - */ - if (transforms & PNG_TRANSFORM_STRIP_FILLER) - png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); -#endif - -#if defined(PNG_WRITE_BGR_SUPPORTED) - /* flip BGR pixels to RGB */ - if (transforms & PNG_TRANSFORM_BGR) - png_set_bgr(png_ptr); -#endif - -#if defined(PNG_WRITE_SWAP_SUPPORTED) - /* swap bytes of 16-bit files to most significant byte first */ - if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) - png_set_swap(png_ptr); -#endif - -#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) - /* swap bits of 1, 2, 4 bit packed pixel formats */ - if (transforms & PNG_TRANSFORM_PACKSWAP) - png_set_packswap(png_ptr); -#endif - - /* ----------------------- end of transformations ------------------- */ - - /* write the bits */ - if (info_ptr->valid & PNG_INFO_IDAT) - png_write_image(png_ptr, info_ptr->row_pointers); - - /* It is REQUIRED to call this to finish writing the rest of the file */ - png_write_end(png_ptr, info_ptr); - - if(transforms == 0 || params == (voidp)NULL) - /* quiet compiler warnings */ return; -} -#endif diff --git a/libraries/libpng-1.0.9/pngwtran.c b/libraries/libpng-1.0.9/pngwtran.c deleted file mode 100644 index 6607298..0000000 --- a/libraries/libpng-1.0.9/pngwtran.c +++ /dev/null @@ -1,561 +0,0 @@ - -/* pngwtran.c - transforms the data in a row for PNG writers - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Transform the data according to the user's wishes. The order of - * transformations is significant. - */ -void /* PRIVATE */ -png_do_write_transformations(png_structp png_ptr) -{ - png_debug(1, "in png_do_write_transformations\n"); - - if (png_ptr == NULL) - return; - -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) - if (png_ptr->transformations & PNG_USER_TRANSFORM) - if(png_ptr->write_user_transform_fn != NULL) - (*(png_ptr->write_user_transform_fn)) /* user write transform function */ - (png_ptr, /* png_ptr */ - &(png_ptr->row_info), /* row_info: */ - /* png_uint_32 width; width of row */ - /* png_uint_32 rowbytes; number of bytes in row */ - /* png_byte color_type; color type of pixels */ - /* png_byte bit_depth; bit depth of samples */ - /* png_byte channels; number of channels (1-4) */ - /* png_byte pixel_depth; bits per pixel (depth*channels) */ - png_ptr->row_buf + 1); /* start of pixel data for row */ -#endif -#if defined(PNG_WRITE_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) - png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->flags); -#endif -#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif -#if defined(PNG_WRITE_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) - png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1, - (png_uint_32)png_ptr->bit_depth); -#endif -#if defined(PNG_WRITE_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif -#if defined(PNG_WRITE_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) - png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->shift)); -#endif -#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_ALPHA) - png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif -#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_ALPHA) - png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif -#if defined(PNG_WRITE_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) - png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif -#if defined(PNG_WRITE_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) - png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif -} - -#if defined(PNG_WRITE_PACK_SUPPORTED) -/* Pack pixels into bytes. Pass the true bit depth in bit_depth. The - * row_info bit depth should be 8 (one pixel per byte). The channels - * should be 1 (this only happens on grayscale and paletted images). - */ -void /* PRIVATE */ -png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) -{ - png_debug(1, "in png_do_pack\n"); - if (row_info->bit_depth == 8 && -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->channels == 1) - { - switch ((int)bit_depth) - { - case 1: - { - png_bytep sp, dp; - int mask, v; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - sp = row; - dp = row; - mask = 0x80; - v = 0; - - for (i = 0; i < row_width; i++) - { - if (*sp != 0) - v |= mask; - sp++; - if (mask > 1) - mask >>= 1; - else - { - mask = 0x80; - *dp = (png_byte)v; - dp++; - v = 0; - } - } - if (mask != 0x80) - *dp = (png_byte)v; - break; - } - case 2: - { - png_bytep sp, dp; - int shift, v; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - sp = row; - dp = row; - shift = 6; - v = 0; - for (i = 0; i < row_width; i++) - { - png_byte value; - - value = (png_byte)(*sp & 0x03); - v |= (value << shift); - if (shift == 0) - { - shift = 6; - *dp = (png_byte)v; - dp++; - v = 0; - } - else - shift -= 2; - sp++; - } - if (shift != 6) - *dp = (png_byte)v; - break; - } - case 4: - { - png_bytep sp, dp; - int shift, v; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - sp = row; - dp = row; - shift = 4; - v = 0; - for (i = 0; i < row_width; i++) - { - png_byte value; - - value = (png_byte)(*sp & 0x0f); - v |= (value << shift); - - if (shift == 0) - { - shift = 4; - *dp = (png_byte)v; - dp++; - v = 0; - } - else - shift -= 4; - - sp++; - } - if (shift != 4) - *dp = (png_byte)v; - break; - } - } - row_info->bit_depth = (png_byte)bit_depth; - row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels); - row_info->rowbytes = - ((row_info->width * row_info->pixel_depth + 7) >> 3); - } -} -#endif - -#if defined(PNG_WRITE_SHIFT_SUPPORTED) -/* Shift pixel values to take advantage of whole range. Pass the - * true number of bits in bit_depth. The row should be packed - * according to row_info->bit_depth. Thus, if you had a row of - * bit depth 4, but the pixels only had values from 0 to 7, you - * would pass 3 as bit_depth, and this routine would translate the - * data to 0 to 15. - */ -void /* PRIVATE */ -png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) -{ - png_debug(1, "in png_do_shift\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL && -#else - if ( -#endif - row_info->color_type != PNG_COLOR_TYPE_PALETTE) - { - int shift_start[4], shift_dec[4]; - int channels = 0; - - if (row_info->color_type & PNG_COLOR_MASK_COLOR) - { - shift_start[channels] = row_info->bit_depth - bit_depth->red; - shift_dec[channels] = bit_depth->red; - channels++; - shift_start[channels] = row_info->bit_depth - bit_depth->green; - shift_dec[channels] = bit_depth->green; - channels++; - shift_start[channels] = row_info->bit_depth - bit_depth->blue; - shift_dec[channels] = bit_depth->blue; - channels++; - } - else - { - shift_start[channels] = row_info->bit_depth - bit_depth->gray; - shift_dec[channels] = bit_depth->gray; - channels++; - } - if (row_info->color_type & PNG_COLOR_MASK_ALPHA) - { - shift_start[channels] = row_info->bit_depth - bit_depth->alpha; - shift_dec[channels] = bit_depth->alpha; - channels++; - } - - /* with low row depths, could only be grayscale, so one channel */ - if (row_info->bit_depth < 8) - { - png_bytep bp = row; - png_uint_32 i; - png_byte mask; - png_uint_32 row_bytes = row_info->rowbytes; - - if (bit_depth->gray == 1 && row_info->bit_depth == 2) - mask = 0x55; - else if (row_info->bit_depth == 4 && bit_depth->gray == 3) - mask = 0x11; - else - mask = 0xff; - - for (i = 0; i < row_bytes; i++, bp++) - { - png_uint_16 v; - int j; - - v = *bp; - *bp = 0; - for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0]) - { - if (j > 0) - *bp |= (png_byte)((v << j) & 0xff); - else - *bp |= (png_byte)((v >> (-j)) & mask); - } - } - } - else if (row_info->bit_depth == 8) - { - png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = channels * row_info->width; - - for (i = 0; i < istop; i++, bp++) - { - - png_uint_16 v; - int j; - int c = (int)(i%channels); - - v = *bp; - *bp = 0; - for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c]) - { - if (j > 0) - *bp |= (png_byte)((v << j) & 0xff); - else - *bp |= (png_byte)((v >> (-j)) & 0xff); - } - } - } - else - { - png_bytep bp; - png_uint_32 i; - png_uint_32 istop = channels * row_info->width; - - for (bp = row, i = 0; i < istop; i++) - { - int c = (int)(i%channels); - png_uint_16 value, v; - int j; - - v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1)); - value = 0; - for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c]) - { - if (j > 0) - value |= (png_uint_16)((v << j) & (png_uint_16)0xffff); - else - value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff); - } - *bp++ = (png_byte)(value >> 8); - *bp++ = (png_byte)(value & 0xff); - } - } - } -} -#endif - -#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -void /* PRIVATE */ -png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_write_swap_alpha\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - /* This converts from ARGB to RGBA */ - if (row_info->bit_depth == 8) - { - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - for (i = 0, sp = dp = row; i < row_width; i++) - { - png_byte save = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = save; - } - } - /* This converts from AARRGGBB to RRGGBBAA */ - else - { - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - for (i = 0, sp = dp = row; i < row_width; i++) - { - png_byte save[2]; - save[0] = *(sp++); - save[1] = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = save[0]; - *(dp++) = save[1]; - } - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - /* This converts from AG to GA */ - if (row_info->bit_depth == 8) - { - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - for (i = 0, sp = dp = row; i < row_width; i++) - { - png_byte save = *(sp++); - *(dp++) = *(sp++); - *(dp++) = save; - } - } - /* This converts from AAGG to GGAA */ - else - { - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - for (i = 0, sp = dp = row; i < row_width; i++) - { - png_byte save[2]; - save[0] = *(sp++); - save[1] = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = save[0]; - *(dp++) = save[1]; - } - } - } - } -} -#endif - -#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -void /* PRIVATE */ -png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_write_invert_alpha\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - /* This inverts the alpha channel in RGBA */ - if (row_info->bit_depth == 8) - { - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - for (i = 0, sp = dp = row; i < row_width; i++) - { - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = (png_byte)(255 - *(sp++)); - } - } - /* This inverts the alpha channel in RRGGBBAA */ - else - { - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - for (i = 0, sp = dp = row; i < row_width; i++) - { - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = (png_byte)(255 - *(sp++)); - *(dp++) = (png_byte)(255 - *(sp++)); - } - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - /* This inverts the alpha channel in GA */ - if (row_info->bit_depth == 8) - { - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - for (i = 0, sp = dp = row; i < row_width; i++) - { - *(dp++) = *(sp++); - *(dp++) = (png_byte)(255 - *(sp++)); - } - } - /* This inverts the alpha channel in GGAA */ - else - { - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - for (i = 0, sp = dp = row; i < row_width; i++) - { - *(dp++) = *(sp++); - *(dp++) = *(sp++); - *(dp++) = (png_byte)(255 - *(sp++)); - *(dp++) = (png_byte)(255 - *(sp++)); - } - } - } - } -} -#endif - -#if defined(PNG_MNG_FEATURES_SUPPORTED) -/* undoes intrapixel differencing */ -void /* PRIVATE */ -png_do_write_intrapixel(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_write_intrapixel\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - (row_info->color_type & PNG_COLOR_MASK_COLOR)) - { - int bytes_per_pixel; - png_uint_32 row_width = row_info->width; - if (row_info->bit_depth == 8) - { - png_bytep rp; - png_uint_32 i; - - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 3; - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 4; - else - return; - - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - *(rp) = (png_byte)((*rp - *(rp+1))&0xff); - *(rp+2) = (png_byte)((*(rp+2) - *(rp+1))&0xff); - } - } - else if (row_info->bit_depth == 16) - { - png_bytep rp; - png_uint_32 i; - - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 6; - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 8; - else - return; - - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - png_uint_32 s0=*(rp )<<8 | *(rp+1); - png_uint_32 s1=*(rp+2)<<8 | *(rp+3); - png_uint_32 s2=*(rp+4)<<8 | *(rp+5); - png_uint_32 red=(s0-s1)&0xffff; - png_uint_32 blue=(s2-s1)&0xffff; - *(rp ) = (png_byte)((red>>8)&0xff); - *(rp+1) = (png_byte)(red&0xff); - *(rp+4) = (png_byte)((blue>>8)&0xff); - *(rp+5) = (png_byte)(blue&0xff); - } - } - } -} -#endif /* PNG_MNG_FEATURES_SUPPORTED */ diff --git a/libraries/libpng-1.0.9/pngwutil.c b/libraries/libpng-1.0.9/pngwutil.c deleted file mode 100644 index f87c86b..0000000 --- a/libraries/libpng-1.0.9/pngwutil.c +++ /dev/null @@ -1,2633 +0,0 @@ - -/* pngwutil.c - utilities to write a PNG file - * - * libpng 1.0.9 - January 31, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Place a 32-bit number into a buffer in PNG byte order. We work - * with unsigned numbers for convenience, although one supported - * ancillary chunk uses signed (two's complement) numbers. - */ -void /* PRIVATE */ -png_save_uint_32(png_bytep buf, png_uint_32 i) -{ - buf[0] = (png_byte)((i >> 24) & 0xff); - buf[1] = (png_byte)((i >> 16) & 0xff); - buf[2] = (png_byte)((i >> 8) & 0xff); - buf[3] = (png_byte)(i & 0xff); -} - -#if defined(PNG_WRITE_pCAL_SUPPORTED) -/* The png_save_int_32 function assumes integers are stored in two's - * complement format. If this isn't the case, then this routine needs to - * be modified to write data in two's complement format. - */ -void /* PRIVATE */ -png_save_int_32(png_bytep buf, png_int_32 i) -{ - buf[0] = (png_byte)((i >> 24) & 0xff); - buf[1] = (png_byte)((i >> 16) & 0xff); - buf[2] = (png_byte)((i >> 8) & 0xff); - buf[3] = (png_byte)(i & 0xff); -} -#endif - -/* Place a 16-bit number into a buffer in PNG byte order. - * The parameter is declared unsigned int, not png_uint_16, - * just to avoid potential problems on pre-ANSI C compilers. - */ -void /* PRIVATE */ -png_save_uint_16(png_bytep buf, unsigned int i) -{ - buf[0] = (png_byte)((i >> 8) & 0xff); - buf[1] = (png_byte)(i & 0xff); -} - -/* Write a PNG chunk all at once. The type is an array of ASCII characters - * representing the chunk name. The array must be at least 4 bytes in - * length, and does not need to be null terminated. To be safe, pass the - * pre-defined chunk names here, and if you need a new one, define it - * where the others are defined. The length is the length of the data. - * All the data must be present. If that is not possible, use the - * png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end() - * functions instead. - */ -void PNGAPI -png_write_chunk(png_structp png_ptr, png_bytep chunk_name, - png_bytep data, png_size_t length) -{ - png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length); - png_write_chunk_data(png_ptr, data, length); - png_write_chunk_end(png_ptr); -} - -/* Write the start of a PNG chunk. The type is the chunk type. - * The total_length is the sum of the lengths of all the data you will be - * passing in png_write_chunk_data(). - */ -void PNGAPI -png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name, - png_uint_32 length) -{ - png_byte buf[4]; - png_debug2(0, "Writing %s chunk (%lu bytes)\n", chunk_name, length); - - /* write the length */ - png_save_uint_32(buf, length); - png_write_data(png_ptr, buf, (png_size_t)4); - - /* write the chunk name */ - png_write_data(png_ptr, chunk_name, (png_size_t)4); - /* reset the crc and run it over the chunk name */ - png_reset_crc(png_ptr); - png_calculate_crc(png_ptr, chunk_name, (png_size_t)4); -} - -/* Write the data of a PNG chunk started with png_write_chunk_start(). - * Note that multiple calls to this function are allowed, and that the - * sum of the lengths from these calls *must* add up to the total_length - * given to png_write_chunk_start(). - */ -void PNGAPI -png_write_chunk_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - /* write the data, and run the CRC over it */ - if (data != NULL && length > 0) - { - png_calculate_crc(png_ptr, data, length); - png_write_data(png_ptr, data, length); - } -} - -/* Finish a chunk started with png_write_chunk_start(). */ -void PNGAPI -png_write_chunk_end(png_structp png_ptr) -{ - png_byte buf[4]; - - /* write the crc */ - png_save_uint_32(buf, png_ptr->crc); - - png_write_data(png_ptr, buf, (png_size_t)4); -} - -/* Simple function to write the signature. If we have already written - * the magic bytes of the signature, or more likely, the PNG stream is - * being embedded into another stream and doesn't need its own signature, - * we should call png_set_sig_bytes() to tell libpng how many of the - * bytes have already been written. - */ -void /* PRIVATE */ -png_write_sig(png_structp png_ptr) -{ - png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; - /* write the rest of the 8 byte signature */ - png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes], - (png_size_t)8 - png_ptr->sig_bytes); - if(png_ptr->sig_bytes < 3) - png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE; -} - -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_iCCP_SUPPORTED) -/* - * This pair of functions encapsulates the operation of (a) compressing a - * text string, and (b) issuing it later as a series of chunk data writes. - * The compression_state structure is shared context for these functions - * set up by the caller in order to make the whole mess thread-safe. - */ - -typedef struct -{ - char *input; /* the uncompressed input data */ - int input_len; /* its length */ - int num_output_ptr; /* number of output pointers used */ - int max_output_ptr; /* size of output_ptr */ - png_charpp output_ptr; /* array of pointers to output */ -} compression_state; - -/* compress given text into storage in the png_ptr structure */ -static int /* PRIVATE */ -png_text_compress(png_structp png_ptr, - png_charp text, png_size_t text_len, int compression, - compression_state *comp) -{ - int ret; - - comp->num_output_ptr = comp->max_output_ptr = 0; - comp->output_ptr = NULL; - comp->input = NULL; - - /* we may just want to pass the text right through */ - if (compression == PNG_TEXT_COMPRESSION_NONE) - { - comp->input = text; - comp->input_len = text_len; - return((int)text_len); - } - - if (compression >= PNG_TEXT_COMPRESSION_LAST) - { -#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) - char msg[50]; - sprintf(msg, "Unknown compression type %d", compression); - png_warning(png_ptr, msg); -#else - png_warning(png_ptr, "Unknown compression type"); -#endif - } - - /* We can't write the chunk until we find out how much data we have, - * which means we need to run the compressor first and save the - * output. This shouldn't be a problem, as the vast majority of - * comments should be reasonable, but we will set up an array of - * malloc'd pointers to be sure. - * - * If we knew the application was well behaved, we could simplify this - * greatly by assuming we can always malloc an output buffer large - * enough to hold the compressed text ((1001 * text_len / 1000) + 12) - * and malloc this directly. The only time this would be a bad idea is - * if we can't malloc more than 64K and we have 64K of random input - * data, or if the input string is incredibly large (although this - * wouldn't cause a failure, just a slowdown due to swapping). - */ - - /* set up the compression buffers */ - png_ptr->zstream.avail_in = (uInt)text_len; - png_ptr->zstream.next_in = (Bytef *)text; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = (Bytef *)png_ptr->zbuf; - - /* this is the same compression loop as in png_write_row() */ - do - { - /* compress the data */ - ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); - if (ret != Z_OK) - { - /* error */ - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - else - png_error(png_ptr, "zlib error"); - } - /* check to see if we need more room */ - if (!png_ptr->zstream.avail_out && png_ptr->zstream.avail_in) - { - /* make sure the output array has room */ - if (comp->num_output_ptr >= comp->max_output_ptr) - { - int old_max; - - old_max = comp->max_output_ptr; - comp->max_output_ptr = comp->num_output_ptr + 4; - if (comp->output_ptr != NULL) - { - png_charpp old_ptr; - - old_ptr = comp->output_ptr; - comp->output_ptr = (png_charpp)png_malloc(png_ptr, - (png_uint_32)(comp->max_output_ptr * sizeof (png_charpp))); - png_memcpy(comp->output_ptr, old_ptr, - old_max * sizeof (png_charp)); - png_free(png_ptr, old_ptr); - } - else - comp->output_ptr = (png_charpp)png_malloc(png_ptr, - (png_uint_32)(comp->max_output_ptr * sizeof (png_charp))); - } - - /* save the data */ - comp->output_ptr[comp->num_output_ptr] = (png_charp)png_malloc(png_ptr, - (png_uint_32)png_ptr->zbuf_size); - png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); - comp->num_output_ptr++; - - /* and reset the buffer */ - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; - } - /* continue until we don't have any more to compress */ - } while (png_ptr->zstream.avail_in); - - /* finish the compression */ - do - { - /* tell zlib we are finished */ - ret = deflate(&png_ptr->zstream, Z_FINISH); - - if (ret == Z_OK) - { - /* check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) - { - /* check to make sure our output array has room */ - if (comp->num_output_ptr >= comp->max_output_ptr) - { - int old_max; - - old_max = comp->max_output_ptr; - comp->max_output_ptr = comp->num_output_ptr + 4; - if (comp->output_ptr != NULL) - { - png_charpp old_ptr; - - old_ptr = comp->output_ptr; - /* This could be optimized to realloc() */ - comp->output_ptr = (png_charpp)png_malloc(png_ptr, - (png_uint_32)(comp->max_output_ptr * sizeof (png_charpp))); - png_memcpy(comp->output_ptr, old_ptr, - old_max * sizeof (png_charp)); - png_free(png_ptr, old_ptr); - } - else - comp->output_ptr = (png_charpp)png_malloc(png_ptr, - (png_uint_32)(comp->max_output_ptr * sizeof (png_charp))); - } - - /* save off the data */ - comp->output_ptr[comp->num_output_ptr] = - (png_charp)png_malloc(png_ptr, (png_uint_32)png_ptr->zbuf_size); - png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); - comp->num_output_ptr++; - - /* and reset the buffer pointers */ - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; - } - } - else if (ret != Z_STREAM_END) - { - /* we got an error */ - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - else - png_error(png_ptr, "zlib error"); - } - } while (ret != Z_STREAM_END); - - /* text length is number of buffers plus last buffer */ - text_len = png_ptr->zbuf_size * comp->num_output_ptr; - if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) - text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out; - - return((int)text_len); -} - -/* ship the compressed text out via chunk writes */ -static void /* PRIVATE */ -png_write_compressed_data_out(png_structp png_ptr, compression_state *comp) -{ - int i; - - /* handle the no-compression case */ - if (comp->input) - { - png_write_chunk_data(png_ptr, (png_bytep)comp->input, comp->input_len); - return; - } - - /* write saved output buffers, if any */ - for (i = 0; i < comp->num_output_ptr; i++) - { - png_write_chunk_data(png_ptr,(png_bytep)comp->output_ptr[i], - png_ptr->zbuf_size); - png_free(png_ptr, comp->output_ptr[i]); - comp->output_ptr[i]=NULL; - } - if (comp->max_output_ptr != 0) - png_free(png_ptr, comp->output_ptr); - comp->output_ptr=NULL; - /* write anything left in zbuf */ - if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size) - png_write_chunk_data(png_ptr, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - - /* reset zlib for another zTXt/iTXt or the image data */ - deflateReset(&png_ptr->zstream); - -} -#endif - -/* Write the IHDR chunk, and update the png_struct with the necessary - * information. Note that the rest of this code depends upon this - * information being correct. - */ -void /* PRIVATE */ -png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, - int bit_depth, int color_type, int compression_type, int filter_type, - int interlace_type) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IHDR; -#endif - png_byte buf[13]; /* buffer to store the IHDR info */ - - png_debug(1, "in png_write_IHDR\n"); - /* Check that we have valid input data from the application info */ - switch (color_type) - { - case PNG_COLOR_TYPE_GRAY: - switch (bit_depth) - { - case 1: - case 2: - case 4: - case 8: - case 16: png_ptr->channels = 1; break; - default: png_error(png_ptr,"Invalid bit depth for grayscale image"); - } - break; - case PNG_COLOR_TYPE_RGB: - if (bit_depth != 8 && bit_depth != 16) - png_error(png_ptr, "Invalid bit depth for RGB image"); - png_ptr->channels = 3; - break; - case PNG_COLOR_TYPE_PALETTE: - switch (bit_depth) - { - case 1: - case 2: - case 4: - case 8: png_ptr->channels = 1; break; - default: png_error(png_ptr, "Invalid bit depth for paletted image"); - } - break; - case PNG_COLOR_TYPE_GRAY_ALPHA: - if (bit_depth != 8 && bit_depth != 16) - png_error(png_ptr, "Invalid bit depth for grayscale+alpha image"); - png_ptr->channels = 2; - break; - case PNG_COLOR_TYPE_RGB_ALPHA: - if (bit_depth != 8 && bit_depth != 16) - png_error(png_ptr, "Invalid bit depth for RGBA image"); - png_ptr->channels = 4; - break; - default: - png_error(png_ptr, "Invalid image color type specified"); - } - - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - { - png_warning(png_ptr, "Invalid compression type specified"); - compression_type = PNG_COMPRESSION_TYPE_BASE; - } - - /* Write filter_method 64 (intrapixel differencing) only if - * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and - * 2. Libpng did not write a PNG signature (this filter_method is only - * used in PNG datastreams that are embedded in MNG datastreams) and - * 3. The application called png_permit_mng_features with a mask that - * included PNG_FLAG_MNG_FILTER_64 and - * 4. The filter_method is 64 and - * 5. The color_type is RGB or RGBA - */ - if ( -#if defined(PNG_MNG_FEATURES_SUPPORTED) - !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && - (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) && - (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) && -#endif - filter_type != PNG_FILTER_TYPE_BASE) - { - png_warning(png_ptr, "Invalid filter type specified"); - filter_type = PNG_FILTER_TYPE_BASE; - } - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - if (interlace_type != PNG_INTERLACE_NONE && - interlace_type != PNG_INTERLACE_ADAM7) - { - png_warning(png_ptr, "Invalid interlace type specified"); - interlace_type = PNG_INTERLACE_ADAM7; - } -#else - interlace_type=PNG_INTERLACE_NONE; -#endif - - /* save off the relevent information */ - png_ptr->bit_depth = (png_byte)bit_depth; - png_ptr->color_type = (png_byte)color_type; - png_ptr->interlaced = (png_byte)interlace_type; - png_ptr->filter_type = (png_byte)filter_type; - png_ptr->width = width; - png_ptr->height = height; - - png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels); - png_ptr->rowbytes = ((width * (png_size_t)png_ptr->pixel_depth + 7) >> 3); - /* set the usr info, so any transformations can modify it */ - png_ptr->usr_width = png_ptr->width; - png_ptr->usr_bit_depth = png_ptr->bit_depth; - png_ptr->usr_channels = png_ptr->channels; - - /* pack the header information into the buffer */ - png_save_uint_32(buf, width); - png_save_uint_32(buf + 4, height); - buf[8] = (png_byte)bit_depth; - buf[9] = (png_byte)color_type; - buf[10] = (png_byte)compression_type; - buf[11] = (png_byte)filter_type; - buf[12] = (png_byte)interlace_type; - - /* write the chunk */ - png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13); - - /* initialize zlib with PNG info */ - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - if (!(png_ptr->do_filter)) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE || - png_ptr->bit_depth < 8) - png_ptr->do_filter = PNG_FILTER_NONE; - else - png_ptr->do_filter = PNG_ALL_FILTERS; - } - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY)) - { - if (png_ptr->do_filter != PNG_FILTER_NONE) - png_ptr->zlib_strategy = Z_FILTERED; - else - png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY; - } - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL)) - png_ptr->zlib_level = Z_DEFAULT_COMPRESSION; - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL)) - png_ptr->zlib_mem_level = 8; - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS)) - png_ptr->zlib_window_bits = 15; - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD)) - png_ptr->zlib_method = 8; - deflateInit2(&png_ptr->zstream, png_ptr->zlib_level, - png_ptr->zlib_method, png_ptr->zlib_window_bits, - png_ptr->zlib_mem_level, png_ptr->zlib_strategy); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - png_ptr->mode = PNG_HAVE_IHDR; -} - -/* write the palette. We are careful not to trust png_color to be in the - * correct order for PNG, so people can redefine it to any convenient - * structure. - */ -void /* PRIVATE */ -png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_PLTE; -#endif - png_uint_32 i; - png_colorp pal_ptr; - png_byte buf[3]; - - png_debug(1, "in png_write_PLTE\n"); - if (( -#if defined(PNG_MNG_FEATURES_SUPPORTED) - !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) && -#endif - num_pal == 0) || num_pal > 256) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_error(png_ptr, "Invalid number of colors in palette"); - } - else - { - png_warning(png_ptr, "Invalid number of colors in palette"); - return; - } - } - - png_ptr->num_palette = (png_uint_16)num_pal; - png_debug1(3, "num_palette = %d\n", png_ptr->num_palette); - - png_write_chunk_start(png_ptr, (png_bytep)png_PLTE, num_pal * 3); -#ifndef PNG_NO_POINTER_INDEXING - for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++) - { - buf[0] = pal_ptr->red; - buf[1] = pal_ptr->green; - buf[2] = pal_ptr->blue; - png_write_chunk_data(png_ptr, buf, (png_size_t)3); - } -#else - /* This is a little slower but some buggy compilers need to do this instead */ - pal_ptr=palette; - for (i = 0; i < num_pal; i++) - { - buf[0] = pal_ptr[i].red; - buf[1] = pal_ptr[i].green; - buf[2] = pal_ptr[i].blue; - png_write_chunk_data(png_ptr, buf, (png_size_t)3); - } -#endif - png_write_chunk_end(png_ptr); - png_ptr->mode |= PNG_HAVE_PLTE; -} - -/* write an IDAT chunk */ -void /* PRIVATE */ -png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IDAT; -#endif - png_debug(1, "in png_write_IDAT\n"); - png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length); - png_ptr->mode |= PNG_HAVE_IDAT; -} - -/* write an IEND chunk */ -void /* PRIVATE */ -png_write_IEND(png_structp png_ptr) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_IEND; -#endif - png_debug(1, "in png_write_IEND\n"); - png_write_chunk(png_ptr, (png_bytep)png_IEND, NULL, (png_size_t)0); - png_ptr->mode |= PNG_HAVE_IEND; -} - -#if defined(PNG_WRITE_gAMA_SUPPORTED) -/* write a gAMA chunk */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -void /* PRIVATE */ -png_write_gAMA(png_structp png_ptr, double file_gamma) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_gAMA; -#endif - png_uint_32 igamma; - png_byte buf[4]; - - png_debug(1, "in png_write_gAMA\n"); - /* file_gamma is saved in 1/100,000ths */ - igamma = (png_uint_32)(file_gamma * 100000.0 + 0.5); - png_save_uint_32(buf, igamma); - png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4); -} -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -void /* PRIVATE */ -png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_gAMA; -#endif - png_byte buf[4]; - - png_debug(1, "in png_write_gAMA\n"); - /* file_gamma is saved in 1/100,000ths */ - png_save_uint_32(buf, file_gamma); - png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4); -} -#endif -#endif - -#if defined(PNG_WRITE_sRGB_SUPPORTED) -/* write a sRGB chunk */ -void /* PRIVATE */ -png_write_sRGB(png_structp png_ptr, int srgb_intent) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_sRGB; -#endif - png_byte buf[1]; - - png_debug(1, "in png_write_sRGB\n"); - if(srgb_intent >= PNG_sRGB_INTENT_LAST) - png_warning(png_ptr, - "Invalid sRGB rendering intent specified"); - buf[0]=(png_byte)srgb_intent; - png_write_chunk(png_ptr, (png_bytep)png_sRGB, buf, (png_size_t)1); -} -#endif - -#if defined(PNG_WRITE_iCCP_SUPPORTED) -/* write an iCCP chunk */ -void /* PRIVATE */ -png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type, - png_charp profile, int profile_len) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_iCCP; -#endif - png_size_t name_len; - png_charp new_name; - compression_state comp; - - png_debug(1, "in png_write_iCCP\n"); - if (name == NULL || (name_len = png_check_keyword(png_ptr, name, - &new_name)) == 0) - { - png_warning(png_ptr, "Empty keyword in iCCP chunk"); - return; - } - - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - png_warning(png_ptr, "Unknown compression type in iCCP chunk"); - - if (profile == NULL) - profile_len = 0; - - if (profile_len) - profile_len = png_text_compress(png_ptr, profile, (png_size_t)profile_len, - PNG_COMPRESSION_TYPE_BASE, &comp); - - /* make sure we include the NULL after the name and the compression type */ - png_write_chunk_start(png_ptr, (png_bytep)png_iCCP, - (png_uint_32)name_len+profile_len+2); - new_name[name_len+1]=0x00; - png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 2); - - if (profile_len) - png_write_compressed_data_out(png_ptr, &comp); - - png_write_chunk_end(png_ptr); - png_free(png_ptr, new_name); -} -#endif - -#if defined(PNG_WRITE_sPLT_SUPPORTED) -/* write a sPLT chunk */ -void /* PRIVATE */ -png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_sPLT; -#endif - png_size_t name_len; - png_charp new_name; - png_byte entrybuf[10]; - int entry_size = (spalette->depth == 8 ? 6 : 10); - int palette_size = entry_size * spalette->nentries; - png_sPLT_entryp ep; -#ifdef PNG_NO_POINTER_INDEXING - int i; -#endif - - png_debug(1, "in png_write_sPLT\n"); - if (spalette->name == NULL || (name_len = png_check_keyword(png_ptr, - spalette->name, &new_name))==0) - { - png_warning(png_ptr, "Empty keyword in sPLT chunk"); - return; - } - - /* make sure we include the NULL after the name */ - png_write_chunk_start(png_ptr, (png_bytep) png_sPLT, - (png_uint_32)(name_len + 2 + palette_size)); - png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 1); - png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, 1); - - /* loop through each palette entry, writing appropriately */ -#ifndef PNG_NO_POINTER_INDEXING - for (ep = spalette->entries; epentries+spalette->nentries; ep++) - { - if (spalette->depth == 8) - { - entrybuf[0] = (png_byte)ep->red; - entrybuf[1] = (png_byte)ep->green; - entrybuf[2] = (png_byte)ep->blue; - entrybuf[3] = (png_byte)ep->alpha; - png_save_uint_16(entrybuf + 4, ep->frequency); - } - else - { - png_save_uint_16(entrybuf + 0, ep->red); - png_save_uint_16(entrybuf + 2, ep->green); - png_save_uint_16(entrybuf + 4, ep->blue); - png_save_uint_16(entrybuf + 6, ep->alpha); - png_save_uint_16(entrybuf + 8, ep->frequency); - } - png_write_chunk_data(png_ptr, entrybuf, entry_size); - } -#else - ep=spalette->entries; - for (i=0; i>spalette->nentries; i++) - { - if (spalette->depth == 8) - { - entrybuf[0] = (png_byte)ep[i].red; - entrybuf[1] = (png_byte)ep[i].green; - entrybuf[2] = (png_byte)ep[i].blue; - entrybuf[3] = (png_byte)ep[i].alpha; - png_save_uint_16(entrybuf + 4, ep[i].frequency); - } - else - { - png_save_uint_16(entrybuf + 0, ep[i].red); - png_save_uint_16(entrybuf + 2, ep[i].green); - png_save_uint_16(entrybuf + 4, ep[i].blue); - png_save_uint_16(entrybuf + 6, ep[i].alpha); - png_save_uint_16(entrybuf + 8, ep[i].frequency); - } - png_write_chunk_data(png_ptr, entrybuf, entry_size); - } -#endif - - png_write_chunk_end(png_ptr); - png_free(png_ptr, new_name); -} -#endif - -#if defined(PNG_WRITE_sBIT_SUPPORTED) -/* write the sBIT chunk */ -void /* PRIVATE */ -png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_sBIT; -#endif - png_byte buf[4]; - png_size_t size; - - png_debug(1, "in png_write_sBIT\n"); - /* make sure we don't depend upon the order of PNG_COLOR_8 */ - if (color_type & PNG_COLOR_MASK_COLOR) - { - png_byte maxbits; - - maxbits = (png_byte)(color_type==PNG_COLOR_TYPE_PALETTE ? 8 : - png_ptr->usr_bit_depth); - if (sbit->red == 0 || sbit->red > maxbits || - sbit->green == 0 || sbit->green > maxbits || - sbit->blue == 0 || sbit->blue > maxbits) - { - png_warning(png_ptr, "Invalid sBIT depth specified"); - return; - } - buf[0] = sbit->red; - buf[1] = sbit->green; - buf[2] = sbit->blue; - size = 3; - } - else - { - if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth) - { - png_warning(png_ptr, "Invalid sBIT depth specified"); - return; - } - buf[0] = sbit->gray; - size = 1; - } - - if (color_type & PNG_COLOR_MASK_ALPHA) - { - if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth) - { - png_warning(png_ptr, "Invalid sBIT depth specified"); - return; - } - buf[size++] = sbit->alpha; - } - - png_write_chunk(png_ptr, (png_bytep)png_sBIT, buf, size); -} -#endif - -#if defined(PNG_WRITE_cHRM_SUPPORTED) -/* write the cHRM chunk */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -void /* PRIVATE */ -png_write_cHRM(png_structp png_ptr, double white_x, double white_y, - double red_x, double red_y, double green_x, double green_y, - double blue_x, double blue_y) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_cHRM; -#endif - png_byte buf[32]; - png_uint_32 itemp; - - png_debug(1, "in png_write_cHRM\n"); - /* each value is saved in 1/100,000ths */ - if (white_x < 0 || white_x > 0.8 || white_y < 0 || white_y > 0.8 || - white_x + white_y > 1.0) - { - png_warning(png_ptr, "Invalid cHRM white point specified"); -#if !defined(PNG_NO_CONSOLE_IO) - fprintf(stderr,"white_x=%f, white_y=%f\n",white_x, white_y); -#endif - return; - } - itemp = (png_uint_32)(white_x * 100000.0 + 0.5); - png_save_uint_32(buf, itemp); - itemp = (png_uint_32)(white_y * 100000.0 + 0.5); - png_save_uint_32(buf + 4, itemp); - - if (red_x < 0 || red_x > 0.8 || red_y < 0 || red_y > 0.8 || - red_x + red_y > 1.0) - { - png_warning(png_ptr, "Invalid cHRM red point specified"); - return; - } - itemp = (png_uint_32)(red_x * 100000.0 + 0.5); - png_save_uint_32(buf + 8, itemp); - itemp = (png_uint_32)(red_y * 100000.0 + 0.5); - png_save_uint_32(buf + 12, itemp); - - if (green_x < 0 || green_x > 0.8 || green_y < 0 || green_y > 0.8 || - green_x + green_y > 1.0) - { - png_warning(png_ptr, "Invalid cHRM green point specified"); - return; - } - itemp = (png_uint_32)(green_x * 100000.0 + 0.5); - png_save_uint_32(buf + 16, itemp); - itemp = (png_uint_32)(green_y * 100000.0 + 0.5); - png_save_uint_32(buf + 20, itemp); - - if (blue_x < 0 || blue_x > 0.8 || blue_y < 0 || blue_y > 0.8 || - blue_x + blue_y > 1.0) - { - png_warning(png_ptr, "Invalid cHRM blue point specified"); - return; - } - itemp = (png_uint_32)(blue_x * 100000.0 + 0.5); - png_save_uint_32(buf + 24, itemp); - itemp = (png_uint_32)(blue_y * 100000.0 + 0.5); - png_save_uint_32(buf + 28, itemp); - - png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32); -} -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -void /* PRIVATE */ -png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, - png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, - png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, - png_fixed_point blue_y) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_cHRM; -#endif - png_byte buf[32]; - - png_debug(1, "in png_write_cHRM\n"); - /* each value is saved in 1/100,000ths */ - if (white_x > 80000L || white_y > 80000L || white_x + white_y > 100000L) - { - png_warning(png_ptr, "Invalid fixed cHRM white point specified"); -#if !defined(PNG_NO_CONSOLE_IO) - fprintf(stderr,"white_x=%ld, white_y=%ld\n",white_x, white_y); -#endif - return; - } - png_save_uint_32(buf, white_x); - png_save_uint_32(buf + 4, white_y); - - if (red_x > 80000L || red_y > 80000L || red_x + red_y > 100000L) - { - png_warning(png_ptr, "Invalid cHRM fixed red point specified"); - return; - } - png_save_uint_32(buf + 8, red_x); - png_save_uint_32(buf + 12, red_y); - - if (green_x > 80000L || green_y > 80000L || green_x + green_y > 100000L) - { - png_warning(png_ptr, "Invalid fixed cHRM green point specified"); - return; - } - png_save_uint_32(buf + 16, green_x); - png_save_uint_32(buf + 20, green_y); - - if (blue_x > 80000L || blue_y > 80000L || blue_x + blue_y > 100000L) - { - png_warning(png_ptr, "Invalid fixed cHRM blue point specified"); - return; - } - png_save_uint_32(buf + 24, blue_x); - png_save_uint_32(buf + 28, blue_y); - - png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32); -} -#endif -#endif - -#if defined(PNG_WRITE_tRNS_SUPPORTED) -/* write the tRNS chunk */ -void /* PRIVATE */ -png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran, - int num_trans, int color_type) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_tRNS; -#endif - png_byte buf[6]; - - png_debug(1, "in png_write_tRNS\n"); - if (color_type == PNG_COLOR_TYPE_PALETTE) - { - if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette) - { - png_warning(png_ptr,"Invalid number of transparent colors specified"); - return; - } - /* write the chunk out as it is */ - png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans, (png_size_t)num_trans); - } - else if (color_type == PNG_COLOR_TYPE_GRAY) - { - /* one 16 bit value */ - png_save_uint_16(buf, tran->gray); - png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)2); - } - else if (color_type == PNG_COLOR_TYPE_RGB) - { - /* three 16 bit values */ - png_save_uint_16(buf, tran->red); - png_save_uint_16(buf + 2, tran->green); - png_save_uint_16(buf + 4, tran->blue); - png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)6); - } - else - { - png_warning(png_ptr, "Can't write tRNS with an alpha channel"); - } -} -#endif - -#if defined(PNG_WRITE_bKGD_SUPPORTED) -/* write the background chunk */ -void /* PRIVATE */ -png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_bKGD; -#endif - png_byte buf[6]; - - png_debug(1, "in png_write_bKGD\n"); - if (color_type == PNG_COLOR_TYPE_PALETTE) - { - if ( -#if defined(PNG_MNG_FEATURES_SUPPORTED) - (png_ptr->num_palette || - (!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE))) && -#endif - back->index > png_ptr->num_palette) - { - png_warning(png_ptr, "Invalid background palette index"); - return; - } - buf[0] = back->index; - png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)1); - } - else if (color_type & PNG_COLOR_MASK_COLOR) - { - png_save_uint_16(buf, back->red); - png_save_uint_16(buf + 2, back->green); - png_save_uint_16(buf + 4, back->blue); - png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)6); - } - else - { - png_save_uint_16(buf, back->gray); - png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)2); - } -} -#endif - -#if defined(PNG_WRITE_hIST_SUPPORTED) -/* write the histogram */ -void /* PRIVATE */ -png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_hIST; -#endif - int i; - png_byte buf[3]; - - png_debug(1, "in png_write_hIST\n"); - if (num_hist > (int)png_ptr->num_palette) - { - png_debug2(3, "num_hist = %d, num_palette = %d\n", num_hist, - png_ptr->num_palette); - png_warning(png_ptr, "Invalid number of histogram entries specified"); - return; - } - - png_write_chunk_start(png_ptr, (png_bytep)png_hIST, (png_uint_32)(num_hist * 2)); - for (i = 0; i < num_hist; i++) - { - png_save_uint_16(buf, hist[i]); - png_write_chunk_data(png_ptr, buf, (png_size_t)2); - } - png_write_chunk_end(png_ptr); -} -#endif - -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ - defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) -/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification, - * and if invalid, correct the keyword rather than discarding the entire - * chunk. The PNG 1.0 specification requires keywords 1-79 characters in - * length, forbids leading or trailing whitespace, multiple internal spaces, - * and the non-break space (0x80) from ISO 8859-1. Returns keyword length. - * - * The new_key is allocated to hold the corrected keyword and must be freed - * by the calling routine. This avoids problems with trying to write to - * static keywords without having to have duplicate copies of the strings. - */ -png_size_t /* PRIVATE */ -png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key) -{ - png_size_t key_len; - png_charp kp, dp; - int kflag; - int kwarn=0; - - png_debug(1, "in png_check_keyword\n"); - *new_key = NULL; - - if (key == NULL || (key_len = png_strlen(key)) == 0) - { - png_warning(png_ptr, "zero length keyword"); - return ((png_size_t)0); - } - - png_debug1(2, "Keyword to be checked is '%s'\n", key); - - *new_key = (png_charp)png_malloc(png_ptr, (png_uint_32)(key_len + 2)); - - /* Replace non-printing characters with a blank and print a warning */ - for (kp = key, dp = *new_key; *kp != '\0'; kp++, dp++) - { - if (*kp < 0x20 || (*kp > 0x7E && (png_byte)*kp < 0xA1)) - { -#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) - char msg[40]; - - sprintf(msg, "invalid keyword character 0x%02X", *kp); - png_warning(png_ptr, msg); -#else - png_warning(png_ptr, "invalid character in keyword"); -#endif - *dp = ' '; - } - else - { - *dp = *kp; - } - } - *dp = '\0'; - - /* Remove any trailing white space. */ - kp = *new_key + key_len - 1; - if (*kp == ' ') - { - png_warning(png_ptr, "trailing spaces removed from keyword"); - - while (*kp == ' ') - { - *(kp--) = '\0'; - key_len--; - } - } - - /* Remove any leading white space. */ - kp = *new_key; - if (*kp == ' ') - { - png_warning(png_ptr, "leading spaces removed from keyword"); - - while (*kp == ' ') - { - kp++; - key_len--; - } - } - - png_debug1(2, "Checking for multiple internal spaces in '%s'\n", kp); - - /* Remove multiple internal spaces. */ - for (kflag = 0, dp = *new_key; *kp != '\0'; kp++) - { - if (*kp == ' ' && kflag == 0) - { - *(dp++) = *kp; - kflag = 1; - } - else if (*kp == ' ') - { - key_len--; - kwarn=1; - } - else - { - *(dp++) = *kp; - kflag = 0; - } - } - *dp = '\0'; - if(kwarn) - png_warning(png_ptr, "extra interior spaces removed from keyword"); - - if (key_len == 0) - { - png_free(png_ptr, *new_key); - *new_key=NULL; - png_warning(png_ptr, "Zero length keyword"); - } - - if (key_len > 79) - { - png_warning(png_ptr, "keyword length must be 1 - 79 characters"); - new_key[79] = '\0'; - key_len = 79; - } - - return (key_len); -} -#endif - -#if defined(PNG_WRITE_tEXt_SUPPORTED) -/* write a tEXt chunk */ -void /* PRIVATE */ -png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text, - png_size_t text_len) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_tEXt; -#endif - png_size_t key_len; - png_charp new_key; - - png_debug(1, "in png_write_tEXt\n"); - if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0) - { - png_warning(png_ptr, "Empty keyword in tEXt chunk"); - return; - } - - if (text == NULL || *text == '\0') - text_len = 0; - else - text_len = png_strlen(text); - - /* make sure we include the 0 after the key */ - png_write_chunk_start(png_ptr, (png_bytep)png_tEXt, (png_uint_32)key_len+text_len+1); - /* - * We leave it to the application to meet PNG-1.0 requirements on the - * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of - * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. - * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. - */ - png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1); - if (text_len) - png_write_chunk_data(png_ptr, (png_bytep)text, text_len); - - png_write_chunk_end(png_ptr); - png_free(png_ptr, new_key); -} -#endif - -#if defined(PNG_WRITE_zTXt_SUPPORTED) -/* write a compressed text chunk */ -void /* PRIVATE */ -png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text, - png_size_t text_len, int compression) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_zTXt; -#endif - png_size_t key_len; - char buf[1]; - png_charp new_key; - compression_state comp; - - png_debug(1, "in png_write_zTXt\n"); - - if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0) - { - png_warning(png_ptr, "Empty keyword in zTXt chunk"); - return; - } - - if (text == NULL || *text == '\0' || compression==PNG_TEXT_COMPRESSION_NONE) - { - png_write_tEXt(png_ptr, new_key, text, (png_size_t)0); - png_free(png_ptr, new_key); - return; - } - - text_len = png_strlen(text); - - png_free(png_ptr, new_key); - - /* compute the compressed data; do it now for the length */ - text_len = png_text_compress(png_ptr, text, text_len, compression, - &comp); - - /* write start of chunk */ - png_write_chunk_start(png_ptr, (png_bytep)png_zTXt, (png_uint_32) - (key_len+text_len+2)); - /* write key */ - png_write_chunk_data(png_ptr, (png_bytep)key, key_len + 1); - buf[0] = (png_byte)compression; - /* write compression */ - png_write_chunk_data(png_ptr, (png_bytep)buf, (png_size_t)1); - /* write the compressed data */ - png_write_compressed_data_out(png_ptr, &comp); - - /* close the chunk */ - png_write_chunk_end(png_ptr); -} -#endif - -#if defined(PNG_WRITE_iTXt_SUPPORTED) -/* write an iTXt chunk */ -void /* PRIVATE */ -png_write_iTXt(png_structp png_ptr, int compression, png_charp key, - png_charp lang, png_charp lang_key, png_charp text) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_iTXt; -#endif - png_size_t lang_len, key_len, lang_key_len, text_len; - png_charp new_lang, new_key; - png_byte cbuf[2]; - compression_state comp; - - png_debug(1, "in png_write_iTXt\n"); - - if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0) - { - png_warning(png_ptr, "Empty keyword in iTXt chunk"); - return; - } - if (lang == NULL || (lang_len = png_check_keyword(png_ptr, lang, - &new_lang))==0) - { - png_warning(png_ptr, "Empty language field in iTXt chunk"); - return; - } - lang_key_len = png_strlen(lang_key); - text_len = png_strlen(text); - - if (text == NULL || *text == '\0') - text_len = 0; - - /* compute the compressed data; do it now for the length */ - text_len = png_text_compress(png_ptr, text, text_len, compression-2, - &comp); - - /* make sure we include the compression flag, the compression byte, - * and the NULs after the key, lang, and lang_key parts */ - - png_write_chunk_start(png_ptr, (png_bytep)png_iTXt, - (png_uint_32)( - 5 /* comp byte, comp flag, terminators for key, lang and lang_key */ - + key_len - + lang_len - + lang_key_len - + text_len)); - - /* - * We leave it to the application to meet PNG-1.0 requirements on the - * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of - * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. - * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. - */ - png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1); - - /* set the compression flag */ - if (compression == PNG_ITXT_COMPRESSION_NONE || \ - compression == PNG_TEXT_COMPRESSION_NONE) - cbuf[0] = 0; - else /* compression == PNG_ITXT_COMPRESSION_zTXt */ - cbuf[0] = 1; - /* set the compression method */ - cbuf[1] = 0; - png_write_chunk_data(png_ptr, cbuf, 2); - - png_write_chunk_data(png_ptr, (png_bytep)new_lang, lang_len + 1); - png_write_chunk_data(png_ptr, (png_bytep)lang_key, lang_key_len+1); - png_write_chunk_data(png_ptr, '\0', 1); - - png_write_compressed_data_out(png_ptr, &comp); - - png_write_chunk_end(png_ptr); - png_free(png_ptr, new_key); - png_free(png_ptr, new_lang); -} -#endif - -#if defined(PNG_WRITE_oFFs_SUPPORTED) -/* write the oFFs chunk */ -void /* PRIVATE */ -png_write_oFFs(png_structp png_ptr, png_uint_32 x_offset, - png_uint_32 y_offset, - int unit_type) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_oFFs; -#endif - png_byte buf[9]; - - png_debug(1, "in png_write_oFFs\n"); - if (unit_type >= PNG_OFFSET_LAST) - png_warning(png_ptr, "Unrecognized unit type for oFFs chunk"); - - png_save_uint_32(buf, x_offset); - png_save_uint_32(buf + 4, y_offset); - buf[8] = (png_byte)unit_type; - - png_write_chunk(png_ptr, (png_bytep)png_oFFs, buf, (png_size_t)9); -} -#endif - -#if defined(PNG_WRITE_pCAL_SUPPORTED) -/* write the pCAL chunk (described in the PNG extensions document) */ -void /* PRIVATE */ -png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, - png_int_32 X1, int type, int nparams, png_charp units, png_charpp params) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_pCAL; -#endif - png_size_t purpose_len, units_len, total_len; - png_uint_32p params_len; - png_byte buf[10]; - png_charp new_purpose; - int i; - - png_debug1(1, "in png_write_pCAL (%d parameters)\n", nparams); - if (type >= PNG_EQUATION_LAST) - png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); - - purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1; - png_debug1(3, "pCAL purpose length = %d\n", purpose_len); - units_len = png_strlen(units) + (nparams == 0 ? 0 : 1); - png_debug1(3, "pCAL units length = %d\n", units_len); - total_len = purpose_len + units_len + 10; - - params_len = (png_uint_32p)png_malloc(png_ptr, (png_uint_32)(nparams - *sizeof(png_uint_32))); - - /* Find the length of each parameter, making sure we don't count the - null terminator for the last parameter. */ - for (i = 0; i < nparams; i++) - { - params_len[i] = png_strlen(params[i]) + (i == nparams - 1 ? 0 : 1); - png_debug2(3, "pCAL parameter %d length = %lu\n", i, params_len[i]); - total_len += (png_size_t)params_len[i]; - } - - png_debug1(3, "pCAL total length = %d\n", total_len); - png_write_chunk_start(png_ptr, (png_bytep)png_pCAL, (png_uint_32)total_len); - png_write_chunk_data(png_ptr, (png_bytep)new_purpose, purpose_len); - png_save_int_32(buf, X0); - png_save_int_32(buf + 4, X1); - buf[8] = (png_byte)type; - buf[9] = (png_byte)nparams; - png_write_chunk_data(png_ptr, buf, (png_size_t)10); - png_write_chunk_data(png_ptr, (png_bytep)units, (png_size_t)units_len); - - png_free(png_ptr, new_purpose); - - for (i = 0; i < nparams; i++) - { - png_write_chunk_data(png_ptr, (png_bytep)params[i], - (png_size_t)params_len[i]); - } - - png_free(png_ptr, params_len); - png_write_chunk_end(png_ptr); -} -#endif - -#if defined(PNG_WRITE_sCAL_SUPPORTED) -/* write the sCAL chunk */ -#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO) -void /* PRIVATE */ -png_write_sCAL(png_structp png_ptr, int unit, double width,double height) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_sCAL; -#endif - png_size_t total_len; - char wbuf[32], hbuf[32]; - - png_debug(1, "in png_write_sCAL\n"); - -#if defined(_WIN32_WCE) -/* sprintf() function is not supported on WindowsCE */ - { - wchar_t wc_buf[32]; - swprintf(wc_buf, TEXT("%12.12e"), width); - WideCharToMultiByte(CP_ACP, 0, wc_buf, -1, wbuf, 32, NULL, NULL); - swprintf(wc_buf, TEXT("%12.12e"), height); - WideCharToMultiByte(CP_ACP, 0, wc_buf, -1, hbuf, 32, NULL, NULL); - } -#else - sprintf(wbuf, "%12.12e", width); - sprintf(hbuf, "%12.12e", height); -#endif - total_len = 1 + png_strlen(wbuf)+1 + png_strlen(hbuf); - - png_debug1(3, "sCAL total length = %d\n", total_len); - png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len); - png_write_chunk_data(png_ptr, (png_bytep)&unit, 1); - png_write_chunk_data(png_ptr, (png_bytep)wbuf, strlen(wbuf)+1); - png_write_chunk_data(png_ptr, (png_bytep)hbuf, strlen(hbuf)); - - png_write_chunk_end(png_ptr); -} -#else -#ifdef PNG_FIXED_POINT_SUPPORTED -void /* PRIVATE */ -png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width, - png_charp height) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_sCAL; -#endif - png_size_t total_len; - char wbuf[32], hbuf[32]; - - png_debug(1, "in png_write_sCAL_s\n"); - - strcpy(wbuf,(const char *)width); - strcpy(hbuf,(const char *)height); - total_len = 1 + png_strlen(wbuf)+1 + png_strlen(hbuf); - - png_debug1(3, "sCAL total length = %d\n", total_len); - png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len); - png_write_chunk_data(png_ptr, (png_bytep)&unit, 1); - png_write_chunk_data(png_ptr, (png_bytep)wbuf, strlen(wbuf)+1); - png_write_chunk_data(png_ptr, (png_bytep)hbuf, strlen(hbuf)); - - png_write_chunk_end(png_ptr); -} -#endif -#endif -#endif - -#if defined(PNG_WRITE_pHYs_SUPPORTED) -/* write the pHYs chunk */ -void /* PRIVATE */ -png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, - png_uint_32 y_pixels_per_unit, - int unit_type) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_pHYs; -#endif - png_byte buf[9]; - - png_debug(1, "in png_write_pHYs\n"); - if (unit_type >= PNG_RESOLUTION_LAST) - png_warning(png_ptr, "Unrecognized unit type for pHYs chunk"); - - png_save_uint_32(buf, x_pixels_per_unit); - png_save_uint_32(buf + 4, y_pixels_per_unit); - buf[8] = (png_byte)unit_type; - - png_write_chunk(png_ptr, (png_bytep)png_pHYs, buf, (png_size_t)9); -} -#endif - -#if defined(PNG_WRITE_tIME_SUPPORTED) -/* Write the tIME chunk. Use either png_convert_from_struct_tm() - * or png_convert_from_time_t(), or fill in the structure yourself. - */ -void /* PRIVATE */ -png_write_tIME(png_structp png_ptr, png_timep mod_time) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_tIME; -#endif - png_byte buf[7]; - - png_debug(1, "in png_write_tIME\n"); - if (mod_time->month > 12 || mod_time->month < 1 || - mod_time->day > 31 || mod_time->day < 1 || - mod_time->hour > 23 || mod_time->second > 60) - { - png_warning(png_ptr, "Invalid time specified for tIME chunk"); - return; - } - - png_save_uint_16(buf, mod_time->year); - buf[2] = mod_time->month; - buf[3] = mod_time->day; - buf[4] = mod_time->hour; - buf[5] = mod_time->minute; - buf[6] = mod_time->second; - - png_write_chunk(png_ptr, (png_bytep)png_tIME, buf, (png_size_t)7); -} -#endif - -/* initializes the row writing capability of libpng */ -void /* PRIVATE */ -png_write_start_row(png_structp png_ptr) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* start of interlace block */ - int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* offset to next interlace block */ - int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - /* start of interlace block in the y direction */ - int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; - - /* offset to next interlace block in the y direction */ - int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif - - png_size_t buf_size; - - png_debug(1, "in png_write_start_row\n"); - buf_size = (png_size_t)(((png_ptr->width * png_ptr->usr_channels * - png_ptr->usr_bit_depth + 7) >> 3) + 1); - - /* set up row buffer */ - png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, (png_uint_32)buf_size); - png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE; - - /* set up filtering buffer, if using this filter */ - if (png_ptr->do_filter & PNG_FILTER_SUB) - { - png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; - } - - /* We only need to keep the previous row if we are using one of these. */ - if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH)) - { - /* set up previous row buffer */ - png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)buf_size); - png_memset(png_ptr->prev_row, 0, buf_size); - - if (png_ptr->do_filter & PNG_FILTER_UP) - { - png_ptr->up_row = (png_bytep )png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; - } - - if (png_ptr->do_filter & PNG_FILTER_AVG) - { - png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; - } - - if (png_ptr->do_filter & PNG_FILTER_PAETH) - { - png_ptr->paeth_row = (png_bytep )png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; - } - } - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* if interlaced, we need to set up width and height of pass */ - if (png_ptr->interlaced) - { - if (!(png_ptr->transformations & PNG_INTERLACE)) - { - png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - - png_pass_ystart[0]) / png_pass_yinc[0]; - png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 - - png_pass_start[0]) / png_pass_inc[0]; - } - else - { - png_ptr->num_rows = png_ptr->height; - png_ptr->usr_width = png_ptr->width; - } - } - else -#endif - { - png_ptr->num_rows = png_ptr->height; - png_ptr->usr_width = png_ptr->width; - } - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; -} - -/* Internal use only. Called when finished processing a row of data. */ -void /* PRIVATE */ -png_write_finish_row(png_structp png_ptr) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* start of interlace block */ - int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* offset to next interlace block */ - int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - /* start of interlace block in the y direction */ - int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; - - /* offset to next interlace block in the y direction */ - int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif - - int ret; - - png_debug(1, "in png_write_finish_row\n"); - /* next row */ - png_ptr->row_number++; - - /* see if we are done */ - if (png_ptr->row_number < png_ptr->num_rows) - return; - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* if interlaced, go to next pass */ - if (png_ptr->interlaced) - { - png_ptr->row_number = 0; - if (png_ptr->transformations & PNG_INTERLACE) - { - png_ptr->pass++; - } - else - { - /* loop until we find a non-zero width or height pass */ - do - { - png_ptr->pass++; - if (png_ptr->pass >= 7) - break; - png_ptr->usr_width = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; - if (png_ptr->transformations & PNG_INTERLACE) - break; - } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0); - - } - - /* reset the row above the image for the next pass */ - if (png_ptr->pass < 7) - { - if (png_ptr->prev_row != NULL) - png_memset(png_ptr->prev_row, 0, - (png_size_t) (((png_uint_32)png_ptr->usr_channels * - (png_uint_32)png_ptr->usr_bit_depth * - png_ptr->width + 7) >> 3) + 1); - return; - } - } -#endif - - /* if we get here, we've just written the last row, so we need - to flush the compressor */ - do - { - /* tell the compressor we are done */ - ret = deflate(&png_ptr->zstream, Z_FINISH); - /* check for an error */ - if (ret == Z_OK) - { - /* check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) - { - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - } - else if (ret != Z_STREAM_END) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - else - png_error(png_ptr, "zlib error"); - } - } while (ret != Z_STREAM_END); - - /* write any extra space */ - if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) - { - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size - - png_ptr->zstream.avail_out); - } - - deflateReset(&png_ptr->zstream); -} - -#if defined(PNG_WRITE_INTERLACING_SUPPORTED) -/* Pick out the correct pixels for the interlace pass. - * The basic idea here is to go through the row with a source - * pointer and a destination pointer (sp and dp), and copy the - * correct pixels for the pass. As the row gets compacted, - * sp will always be >= dp, so we should never overwrite anything. - * See the default: case for the easiest code to understand. - */ -void /* PRIVATE */ -png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) -{ -#ifdef PNG_USE_LOCAL_ARRAYS - /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* start of interlace block */ - int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* offset to next interlace block */ - int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; -#endif - - png_debug(1, "in png_do_write_interlace\n"); - /* we don't have to do anything on the last pass (6) */ -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL && pass < 6) -#else - if (pass < 6) -#endif - { - /* each pixel depth is handled separately */ - switch (row_info->pixel_depth) - { - case 1: - { - png_bytep sp; - png_bytep dp; - int shift; - int d; - int value; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - dp = row; - d = 0; - shift = 7; - for (i = png_pass_start[pass]; i < row_width; - i += png_pass_inc[pass]) - { - sp = row + (png_size_t)(i >> 3); - value = (int)(*sp >> (7 - (int)(i & 0x07))) & 0x01; - d |= (value << shift); - - if (shift == 0) - { - shift = 7; - *dp++ = (png_byte)d; - d = 0; - } - else - shift--; - - } - if (shift != 7) - *dp = (png_byte)d; - break; - } - case 2: - { - png_bytep sp; - png_bytep dp; - int shift; - int d; - int value; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - dp = row; - shift = 6; - d = 0; - for (i = png_pass_start[pass]; i < row_width; - i += png_pass_inc[pass]) - { - sp = row + (png_size_t)(i >> 2); - value = (*sp >> ((3 - (int)(i & 0x03)) << 1)) & 0x03; - d |= (value << shift); - - if (shift == 0) - { - shift = 6; - *dp++ = (png_byte)d; - d = 0; - } - else - shift -= 2; - } - if (shift != 6) - *dp = (png_byte)d; - break; - } - case 4: - { - png_bytep sp; - png_bytep dp; - int shift; - int d; - int value; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - dp = row; - shift = 4; - d = 0; - for (i = png_pass_start[pass]; i < row_width; - i += png_pass_inc[pass]) - { - sp = row + (png_size_t)(i >> 1); - value = (*sp >> ((1 - (int)(i & 0x01)) << 2)) & 0x0f; - d |= (value << shift); - - if (shift == 0) - { - shift = 4; - *dp++ = (png_byte)d; - d = 0; - } - else - shift -= 4; - } - if (shift != 4) - *dp = (png_byte)d; - break; - } - default: - { - png_bytep sp; - png_bytep dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - png_size_t pixel_bytes; - - /* start at the beginning */ - dp = row; - /* find out how many bytes each pixel takes up */ - pixel_bytes = (row_info->pixel_depth >> 3); - /* loop through the row, only looking at the pixels that - matter */ - for (i = png_pass_start[pass]; i < row_width; - i += png_pass_inc[pass]) - { - /* find out where the original pixel is */ - sp = row + (png_size_t)i * pixel_bytes; - /* move the pixel */ - if (dp != sp) - png_memcpy(dp, sp, pixel_bytes); - /* next pixel */ - dp += pixel_bytes; - } - break; - } - } - /* set new row width */ - row_info->width = (row_info->width + - png_pass_inc[pass] - 1 - - png_pass_start[pass]) / - png_pass_inc[pass]; - row_info->rowbytes = ((row_info->width * - row_info->pixel_depth + 7) >> 3); - } -} -#endif - -/* This filters the row, chooses which filter to use, if it has not already - * been specified by the application, and then writes the row out with the - * chosen filter. - */ -#define PNG_MAXSUM (~((png_uint_32)0) >> 1) -#define PNG_HISHIFT 10 -#define PNG_LOMASK ((png_uint_32)0xffffL) -#define PNG_HIMASK ((png_uint_32)(~PNG_LOMASK >> PNG_HISHIFT)) -void /* PRIVATE */ -png_write_find_filter(png_structp png_ptr, png_row_infop row_info) -{ - png_bytep prev_row, best_row, row_buf; - png_uint_32 mins, bpp; - png_byte filter_to_do = png_ptr->do_filter; - png_uint_32 row_bytes = row_info->rowbytes; -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - int num_p_filters = (int)png_ptr->num_prev_filters; -#endif - - png_debug(1, "in png_write_find_filter\n"); - /* find out how many bytes offset each pixel is */ - bpp = (row_info->pixel_depth + 7) / 8; - - prev_row = png_ptr->prev_row; - best_row = row_buf = png_ptr->row_buf; - mins = PNG_MAXSUM; - - /* The prediction method we use is to find which method provides the - * smallest value when summing the absolute values of the distances - * from zero, using anything >= 128 as negative numbers. This is known - * as the "minimum sum of absolute differences" heuristic. Other - * heuristics are the "weighted minimum sum of absolute differences" - * (experimental and can in theory improve compression), and the "zlib - * predictive" method (not implemented yet), which does test compressions - * of lines using different filter methods, and then chooses the - * (series of) filter(s) that give minimum compressed data size (VERY - * computationally expensive). - * - * GRR 980525: consider also - * (1) minimum sum of absolute differences from running average (i.e., - * keep running sum of non-absolute differences & count of bytes) - * [track dispersion, too? restart average if dispersion too large?] - * (1b) minimum sum of absolute differences from sliding average, probably - * with window size <= deflate window (usually 32K) - * (2) minimum sum of squared differences from zero or running average - * (i.e., ~ root-mean-square approach) - */ - - - /* We don't need to test the 'no filter' case if this is the only filter - * that has been chosen, as it doesn't actually do anything to the data. - */ - if ((filter_to_do & PNG_FILTER_NONE) && - filter_to_do != PNG_FILTER_NONE) - { - png_bytep rp; - png_uint_32 sum = 0; - png_uint_32 i; - int v; - - for (i = 0, rp = row_buf + 1; i < row_bytes; i++, rp++) - { - v = *rp; - sum += (v < 128) ? v : 256 - v; - } - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - png_uint_32 sumhi, sumlo; - int j; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; /* Gives us some footroom */ - - /* Reduce the sum if we match any of the previous rows */ - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE) - { - sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - /* Factor in the cost of this filter (this is here for completeness, - * but it makes no sense to have a "cost" for the NONE filter, as - * it has the minimum possible computational cost - none). - */ - sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >> - PNG_COST_SHIFT; - sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - mins = sum; - } - - /* sub filter */ - if (filter_to_do == PNG_FILTER_SUB) - /* it's the only filter so no testing is needed */ - { - png_bytep rp, lp, dp; - png_uint_32 i; - for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp; - i++, rp++, dp++) - { - *dp = *rp; - } - for (lp = row_buf + 1; i < row_bytes; - i++, rp++, lp++, dp++) - { - *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff); - } - best_row = png_ptr->sub_row; - } - - else if (filter_to_do & PNG_FILTER_SUB) - { - png_bytep rp, dp, lp; - png_uint_32 sum = 0, lmins = mins; - png_uint_32 i; - int v; - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - /* We temporarily increase the "minimum sum" by the factor we - * would reduce the sum of this filter, so that we can do the - * early exit comparison without scaling the sum each time. - */ - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 lmhi, lmlo; - lmlo = lmins & PNG_LOMASK; - lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB) - { - lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; - lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; - - if (lmhi > PNG_HIMASK) - lmins = PNG_MAXSUM; - else - lmins = (lmhi << PNG_HISHIFT) + lmlo; - } -#endif - - for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp; - i++, rp++, dp++) - { - v = *dp = *rp; - - sum += (v < 128) ? v : 256 - v; - } - for (lp = row_buf + 1; i < row_info->rowbytes; - i++, rp++, lp++, dp++) - { - v = *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 sumhi, sumlo; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB) - { - sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; - sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - - if (sum < mins) - { - mins = sum; - best_row = png_ptr->sub_row; - } - } - - /* up filter */ - if (filter_to_do == PNG_FILTER_UP) - { - png_bytep rp, dp, pp; - png_uint_32 i; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1, - pp = prev_row + 1; i < row_bytes; - i++, rp++, pp++, dp++) - { - *dp = (png_byte)(((int)*rp - (int)*pp) & 0xff); - } - best_row = png_ptr->up_row; - } - - else if (filter_to_do & PNG_FILTER_UP) - { - png_bytep rp, dp, pp; - png_uint_32 sum = 0, lmins = mins; - png_uint_32 i; - int v; - - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 lmhi, lmlo; - lmlo = lmins & PNG_LOMASK; - lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP) - { - lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; - lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; - - if (lmhi > PNG_HIMASK) - lmins = PNG_MAXSUM; - else - lmins = (lmhi << PNG_HISHIFT) + lmlo; - } -#endif - - for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1, - pp = prev_row + 1; i < row_bytes; i++) - { - v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 sumhi, sumlo; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP) - { - sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; - sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - - if (sum < mins) - { - mins = sum; - best_row = png_ptr->up_row; - } - } - - /* avg filter */ - if (filter_to_do == PNG_FILTER_AVG) - { - png_bytep rp, dp, pp, lp; - png_uint_32 i; - for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff); - } - for (lp = row_buf + 1; i < row_bytes; i++) - { - *dp++ = (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) - & 0xff); - } - best_row = png_ptr->avg_row; - } - - else if (filter_to_do & PNG_FILTER_AVG) - { - png_bytep rp, dp, pp, lp; - png_uint_32 sum = 0, lmins = mins; - png_uint_32 i; - int v; - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 lmhi, lmlo; - lmlo = lmins & PNG_LOMASK; - lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG) - { - lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; - lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; - - if (lmhi > PNG_HIMASK) - lmins = PNG_MAXSUM; - else - lmins = (lmhi << PNG_HISHIFT) + lmlo; - } -#endif - - for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - v = *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff); - - sum += (v < 128) ? v : 256 - v; - } - for (lp = row_buf + 1; i < row_bytes; i++) - { - v = *dp++ = - (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 sumhi, sumlo; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE) - { - sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; - sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - - if (sum < mins) - { - mins = sum; - best_row = png_ptr->avg_row; - } - } - - /* Paeth filter */ - if (filter_to_do == PNG_FILTER_PAETH) - { - png_bytep rp, dp, pp, cp, lp; - png_uint_32 i; - for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); - } - - for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++) - { - int a, b, c, pa, pb, pc, p; - - b = *pp++; - c = *cp++; - a = *lp++; - - p = b - c; - pc = a - c; - -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - - p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; - - *dp++ = (png_byte)(((int)*rp++ - p) & 0xff); - } - best_row = png_ptr->paeth_row; - } - - else if (filter_to_do & PNG_FILTER_PAETH) - { - png_bytep rp, dp, pp, cp, lp; - png_uint_32 sum = 0, lmins = mins; - png_uint_32 i; - int v; - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 lmhi, lmlo; - lmlo = lmins & PNG_LOMASK; - lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH) - { - lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; - lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; - - if (lmhi > PNG_HIMASK) - lmins = PNG_MAXSUM; - else - lmins = (lmhi << PNG_HISHIFT) + lmlo; - } -#endif - - for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); - - sum += (v < 128) ? v : 256 - v; - } - - for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++) - { - int a, b, c, pa, pb, pc, p; - - b = *pp++; - c = *cp++; - a = *lp++; - -#ifndef PNG_SLOW_PAETH - p = b - c; - pc = a - c; -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; -#else /* PNG_SLOW_PAETH */ - p = a + b - c; - pa = abs(p - a); - pb = abs(p - b); - pc = abs(p - c); - if (pa <= pb && pa <= pc) - p = a; - else if (pb <= pc) - p = b; - else - p = c; -#endif /* PNG_SLOW_PAETH */ - - v = *dp++ = (png_byte)(((int)*rp++ - p) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 sumhi, sumlo; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH) - { - sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; - sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - - if (sum < mins) - { - best_row = png_ptr->paeth_row; - } - } - - /* Do the actual writing of the filtered row data from the chosen filter. */ - - png_write_filtered_row(png_ptr, best_row); - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - /* Save the type of filter we picked this time for future calculations */ - if (png_ptr->num_prev_filters > 0) - { - int j; - for (j = 1; j < num_p_filters; j++) - { - png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1]; - } - png_ptr->prev_filters[j] = best_row[0]; - } -#endif -} - - -/* Do the actual writing of a previously filtered row. */ -void /* PRIVATE */ -png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row) -{ - png_debug(1, "in png_write_filtered_row\n"); - png_debug1(2, "filter = %d\n", filtered_row[0]); - /* set up the zlib input buffer */ - - png_ptr->zstream.next_in = filtered_row; - png_ptr->zstream.avail_in = (uInt)png_ptr->row_info.rowbytes + 1; - /* repeat until we have compressed all the data */ - do - { - int ret; /* return of zlib */ - - /* compress the data */ - ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); - /* check for compression errors */ - if (ret != Z_OK) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - else - png_error(png_ptr, "zlib error"); - } - - /* see if it is time to write another IDAT */ - if (!(png_ptr->zstream.avail_out)) - { - /* write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - /* repeat until all data has been compressed */ - } while (png_ptr->zstream.avail_in); - - /* swap the current and previous rows */ - if (png_ptr->prev_row != NULL) - { - png_bytep tptr; - - tptr = png_ptr->prev_row; - png_ptr->prev_row = png_ptr->row_buf; - png_ptr->row_buf = tptr; - } - - /* finish row - updates counters and flushes zlib if last row */ - png_write_finish_row(png_ptr); - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) - png_ptr->flush_rows++; - - if (png_ptr->flush_dist > 0 && - png_ptr->flush_rows >= png_ptr->flush_dist) - { - png_write_flush(png_ptr); - } -#endif -}