X-Git-Url: https://git.octo.it/?a=blobdiff_plain;ds=sidebyside;f=libraries%2Flibart_lgpl-2.3.7%2Fart_rgb_svp.c;fp=libraries%2Flibart_lgpl-2.3.7%2Fart_rgb_svp.c;h=0000000000000000000000000000000000000000;hb=5d405fd05bbfbbd94a7c6cbd876e6634025c1c25;hp=81cf562839fd04a2137f76adfffe296607678eae;hpb=bab0189ee9d56aca8bea909275317ab4e0be09ee;p=rrdtool.git diff --git a/libraries/libart_lgpl-2.3.7/art_rgb_svp.c b/libraries/libart_lgpl-2.3.7/art_rgb_svp.c deleted file mode 100644 index 81cf562..0000000 --- a/libraries/libart_lgpl-2.3.7/art_rgb_svp.c +++ /dev/null @@ -1,457 +0,0 @@ -/* Libart_LGPL - library of basic graphic primitives - * Copyright (C) 1998 Raph Levien - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library 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 - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/* Render a sorted vector path into an RGB buffer. */ - -#include "art_misc.h" - -#include "art_svp.h" -#include "art_svp_render_aa.h" -#include "art_rgb.h" -#include "art_rgb_svp.h" - -typedef struct _ArtRgbSVPData ArtRgbSVPData; -typedef struct _ArtRgbSVPAlphaData ArtRgbSVPAlphaData; - -struct _ArtRgbSVPData { - art_u32 rgbtab[256]; - art_u8 *buf; - int rowstride; - int x0, x1; -}; - -struct _ArtRgbSVPAlphaData { - int alphatab[256]; - art_u8 r, g, b, alpha; - art_u8 *buf; - int rowstride; - int x0, x1; -}; - -static void -art_rgb_svp_callback (void *callback_data, int y, - int start, ArtSVPRenderAAStep *steps, int n_steps) -{ - ArtRgbSVPData *data = (ArtRgbSVPData *)callback_data; - art_u8 *linebuf; - int run_x0, run_x1; - art_u32 running_sum = start; - art_u32 rgb; - int x0, x1; - int k; - - linebuf = data->buf; - x0 = data->x0; - x1 = data->x1; - - if (n_steps > 0) - { - run_x1 = steps[0].x; - if (run_x1 > x0) - { - rgb = data->rgbtab[(running_sum >> 16) & 0xff]; - art_rgb_fill_run (linebuf, - rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff, - run_x1 - x0); - } - - for (k = 0; k < n_steps - 1; k++) - { - running_sum += steps[k].delta; - run_x0 = run_x1; - run_x1 = steps[k + 1].x; - if (run_x1 > run_x0) - { - rgb = data->rgbtab[(running_sum >> 16) & 0xff]; - art_rgb_fill_run (linebuf + (run_x0 - x0) * 3, - rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff, - run_x1 - run_x0); - } - } - running_sum += steps[k].delta; - if (x1 > run_x1) - { - rgb = data->rgbtab[(running_sum >> 16) & 0xff]; - art_rgb_fill_run (linebuf + (run_x1 - x0) * 3, - rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff, - x1 - run_x1); - } - } - else - { - rgb = data->rgbtab[(running_sum >> 16) & 0xff]; - art_rgb_fill_run (linebuf, - rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff, - x1 - x0); - } - - data->buf += data->rowstride; -} - -/* Render the vector path into the RGB buffer. */ - -/** - * art_rgb_svp_aa: Render sorted vector path into RGB buffer. - * @svp: The source sorted vector path. - * @x0: Left coordinate of destination rectangle. - * @y0: Top coordinate of destination rectangle. - * @x1: Right coordinate of destination rectangle. - * @y1: Bottom coordinate of destination rectangle. - * @fg_color: Foreground color in 0xRRGGBB format. - * @bg_color: Background color in 0xRRGGBB format. - * @buf: Destination RGB buffer. - * @rowstride: Rowstride of @buf buffer. - * @alphagamma: #ArtAlphaGamma for gamma-correcting the rendering. - * - * Renders the shape specified with @svp into the @buf RGB buffer. - * @x1 - @x0 specifies the width, and @y1 - @y0 specifies the height, - * of the rectangle rendered. The new pixels are stored starting at - * the first byte of @buf. Thus, the @x0 and @y0 parameters specify - * an offset within @svp, and may be tweaked as a way of doing - * integer-pixel translations without fiddling with @svp itself. - * - * The @fg_color and @bg_color arguments specify the opaque colors to - * be used for rendering. For pixels of entirely 0 winding-number, - * @bg_color is used. For pixels of entirely 1 winding number, - * @fg_color is used. In between, the color is interpolated based on - * the fraction of the pixel with a winding number of 1. If - * @alphagamma is NULL, then linear interpolation (in pixel counts) is - * the default. Otherwise, the interpolation is as specified by - * @alphagamma. - **/ -void -art_rgb_svp_aa (const ArtSVP *svp, - int x0, int y0, int x1, int y1, - art_u32 fg_color, art_u32 bg_color, - art_u8 *buf, int rowstride, - ArtAlphaGamma *alphagamma) -{ - ArtRgbSVPData data; - - int r_fg, g_fg, b_fg; - int r_bg, g_bg, b_bg; - int r, g, b; - int dr, dg, db; - int i; - - if (alphagamma == NULL) - { - r_fg = fg_color >> 16; - g_fg = (fg_color >> 8) & 0xff; - b_fg = fg_color & 0xff; - - r_bg = bg_color >> 16; - g_bg = (bg_color >> 8) & 0xff; - b_bg = bg_color & 0xff; - - r = (r_bg << 16) + 0x8000; - g = (g_bg << 16) + 0x8000; - b = (b_bg << 16) + 0x8000; - dr = ((r_fg - r_bg) << 16) / 255; - dg = ((g_fg - g_bg) << 16) / 255; - db = ((b_fg - b_bg) << 16) / 255; - - for (i = 0; i < 256; i++) - { - data.rgbtab[i] = (r & 0xff0000) | ((g & 0xff0000) >> 8) | (b >> 16); - r += dr; - g += dg; - b += db; - } - } - else - { - int *table; - art_u8 *invtab; - - table = alphagamma->table; - - r_fg = table[fg_color >> 16]; - g_fg = table[(fg_color >> 8) & 0xff]; - b_fg = table[fg_color & 0xff]; - - r_bg = table[bg_color >> 16]; - g_bg = table[(bg_color >> 8) & 0xff]; - b_bg = table[bg_color & 0xff]; - - r = (r_bg << 16) + 0x8000; - g = (g_bg << 16) + 0x8000; - b = (b_bg << 16) + 0x8000; - dr = ((r_fg - r_bg) << 16) / 255; - dg = ((g_fg - g_bg) << 16) / 255; - db = ((b_fg - b_bg) << 16) / 255; - - invtab = alphagamma->invtable; - for (i = 0; i < 256; i++) - { - data.rgbtab[i] = (invtab[r >> 16] << 16) | - (invtab[g >> 16] << 8) | - invtab[b >> 16]; - r += dr; - g += dg; - b += db; - } - } - data.buf = buf; - data.rowstride = rowstride; - data.x0 = x0; - data.x1 = x1; - art_svp_render_aa (svp, x0, y0, x1, y1, art_rgb_svp_callback, &data); -} - -static void -art_rgb_svp_alpha_callback (void *callback_data, int y, - int start, ArtSVPRenderAAStep *steps, int n_steps) -{ - ArtRgbSVPAlphaData *data = (ArtRgbSVPAlphaData *)callback_data; - art_u8 *linebuf; - int run_x0, run_x1; - art_u32 running_sum = start; - int x0, x1; - int k; - art_u8 r, g, b; - int *alphatab; - int alpha; - - linebuf = data->buf; - x0 = data->x0; - x1 = data->x1; - - r = data->r; - g = data->g; - b = data->b; - alphatab = data->alphatab; - - if (n_steps > 0) - { - run_x1 = steps[0].x; - if (run_x1 > x0) - { - alpha = (running_sum >> 16) & 0xff; - if (alpha) - art_rgb_run_alpha (linebuf, - r, g, b, alphatab[alpha], - run_x1 - x0); - } - - for (k = 0; k < n_steps - 1; k++) - { - running_sum += steps[k].delta; - run_x0 = run_x1; - run_x1 = steps[k + 1].x; - if (run_x1 > run_x0) - { - alpha = (running_sum >> 16) & 0xff; - if (alpha) - art_rgb_run_alpha (linebuf + (run_x0 - x0) * 3, - r, g, b, alphatab[alpha], - run_x1 - run_x0); - } - } - running_sum += steps[k].delta; - if (x1 > run_x1) - { - alpha = (running_sum >> 16) & 0xff; - if (alpha) - art_rgb_run_alpha (linebuf + (run_x1 - x0) * 3, - r, g, b, alphatab[alpha], - x1 - run_x1); - } - } - else - { - alpha = (running_sum >> 16) & 0xff; - if (alpha) - art_rgb_run_alpha (linebuf, - r, g, b, alphatab[alpha], - x1 - x0); - } - - data->buf += data->rowstride; -} - -static void -art_rgb_svp_alpha_opaque_callback (void *callback_data, int y, - int start, - ArtSVPRenderAAStep *steps, int n_steps) -{ - ArtRgbSVPAlphaData *data = (ArtRgbSVPAlphaData *)callback_data; - art_u8 *linebuf; - int run_x0, run_x1; - art_u32 running_sum = start; - int x0, x1; - int k; - art_u8 r, g, b; - int *alphatab; - int alpha; - - linebuf = data->buf; - x0 = data->x0; - x1 = data->x1; - - r = data->r; - g = data->g; - b = data->b; - alphatab = data->alphatab; - - if (n_steps > 0) - { - run_x1 = steps[0].x; - if (run_x1 > x0) - { - alpha = running_sum >> 16; - if (alpha) - { - if (alpha >= 255) - art_rgb_fill_run (linebuf, - r, g, b, - run_x1 - x0); - else - art_rgb_run_alpha (linebuf, - r, g, b, alphatab[alpha], - run_x1 - x0); - } - } - - for (k = 0; k < n_steps - 1; k++) - { - running_sum += steps[k].delta; - run_x0 = run_x1; - run_x1 = steps[k + 1].x; - if (run_x1 > run_x0) - { - alpha = running_sum >> 16; - if (alpha) - { - if (alpha >= 255) - art_rgb_fill_run (linebuf + (run_x0 - x0) * 3, - r, g, b, - run_x1 - run_x0); - else - art_rgb_run_alpha (linebuf + (run_x0 - x0) * 3, - r, g, b, alphatab[alpha], - run_x1 - run_x0); - } - } - } - running_sum += steps[k].delta; - if (x1 > run_x1) - { - alpha = running_sum >> 16; - if (alpha) - { - if (alpha >= 255) - art_rgb_fill_run (linebuf + (run_x1 - x0) * 3, - r, g, b, - x1 - run_x1); - else - art_rgb_run_alpha (linebuf + (run_x1 - x0) * 3, - r, g, b, alphatab[alpha], - x1 - run_x1); - } - } - } - else - { - alpha = running_sum >> 16; - if (alpha) - { - if (alpha >= 255) - art_rgb_fill_run (linebuf, - r, g, b, - x1 - x0); - else - art_rgb_run_alpha (linebuf, - r, g, b, alphatab[alpha], - x1 - x0); - } - } - - data->buf += data->rowstride; -} - -/** - * art_rgb_svp_alpha: Alpha-composite sorted vector path over RGB buffer. - * @svp: The source sorted vector path. - * @x0: Left coordinate of destination rectangle. - * @y0: Top coordinate of destination rectangle. - * @x1: Right coordinate of destination rectangle. - * @y1: Bottom coordinate of destination rectangle. - * @rgba: Color in 0xRRGGBBAA format. - * @buf: Destination RGB buffer. - * @rowstride: Rowstride of @buf buffer. - * @alphagamma: #ArtAlphaGamma for gamma-correcting the compositing. - * - * Renders the shape specified with @svp over the @buf RGB buffer. - * @x1 - @x0 specifies the width, and @y1 - @y0 specifies the height, - * of the rectangle rendered. The new pixels are stored starting at - * the first byte of @buf. Thus, the @x0 and @y0 parameters specify - * an offset within @svp, and may be tweaked as a way of doing - * integer-pixel translations without fiddling with @svp itself. - * - * The @rgba argument specifies the color for the rendering. Pixels of - * entirely 0 winding number are left untouched. Pixels of entirely - * 1 winding number have the color @rgba composited over them (ie, - * are replaced by the red, green, blue components of @rgba if the alpha - * component is 0xff). Pixels of intermediate coverage are interpolated - * according to the rule in @alphagamma, or default to linear if - * @alphagamma is NULL. - **/ -void -art_rgb_svp_alpha (const ArtSVP *svp, - int x0, int y0, int x1, int y1, - art_u32 rgba, - art_u8 *buf, int rowstride, - ArtAlphaGamma *alphagamma) -{ - ArtRgbSVPAlphaData data; - int r, g, b, alpha; - int i; - int a, da; - - r = rgba >> 24; - g = (rgba >> 16) & 0xff; - b = (rgba >> 8) & 0xff; - alpha = rgba & 0xff; - - data.r = r; - data.g = g; - data.b = b; - data.alpha = alpha; - - a = 0x8000; - da = (alpha * 66051 + 0x80) >> 8; /* 66051 equals 2 ^ 32 / (255 * 255) */ - - for (i = 0; i < 256; i++) - { - data.alphatab[i] = a >> 16; - a += da; - } - - data.buf = buf; - data.rowstride = rowstride; - data.x0 = x0; - data.x1 = x1; - if (alpha == 255) - art_svp_render_aa (svp, x0, y0, x1, y1, art_rgb_svp_alpha_opaque_callback, - &data); - else - art_svp_render_aa (svp, x0, y0, x1, y1, art_rgb_svp_alpha_callback, &data); -} -