- }
- d->dash_enable = 1;
- d->dash_len = node->dash_on + node->dash_off;
- /* dash on/off adjustment due to round caps */
- d->dash_adjust = 0.8 * node->size;
- d->adjusted_on = node->dash_on - d->dash_adjust;
- if (d->adjusted_on < 0.01)
- d->adjusted_on = 0.01;
- d->adjusted_off = d->dash_len - d->adjusted_on;
- /* dash offset calc */
- if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
- offset = node->path[0].y;
- else
- offset = node->path[0].x;
- mult = (int) fabs(offset / d->dash_len);
- d->dash_offset = offset - mult * d->dash_len;
- if (node->path[0].x < node->path[1].x
- || node->path[0].y < node->path[1].y)
- d->dash_offset = d->dash_len - d->dash_offset;
-}
-
-static int svg_dash_equal(
- svg_dash * a,
- svg_dash * b)
-{
- if (a->dash_enable != b->dash_enable)
- return 0;
- if (a->adjusted_on != b->adjusted_on)
- return 0;
- if (a->adjusted_off != b->adjusted_off)
- return 0;
- /* rest of properties will be the same when on+off are */
- return 1;
-}
-
-static void svg_common_path_attributes(
- FILE * fp,
- gfx_node_t * node)
-{
- svg_dash dash_info;
-
- svg_get_dash(node, &dash_info);
- fputs(" stroke-width=\"", fp);
- svg_write_number(fp, node->size);
- fputs("\"", fp);
- svg_write_color(fp, node->color, "stroke");
- fputs(" fill=\"none\"", fp);
- if (dash_info.dash_enable) {
- if (dash_info.dash_offset != 0) {
- fputs(" stroke-dashoffset=\"", fp);
- svg_write_number(fp, dash_info.dash_offset);
- fputs("\"", fp);
- }
- fputs(" stroke-dasharray=\"", fp);
- svg_write_number(fp, dash_info.adjusted_on);
- fputs(",", fp);
- svg_write_number(fp, dash_info.adjusted_off);
- fputs("\"", fp);
- }
-}
-
-static int svg_is_int_step(
- double a,
- double b)
-{
- double diff = fabs(a - b);
-
- return floor(diff) == diff;
-}
-
-static int svg_path_straight_segment(
- FILE * fp,
- double lastA,
- double currentA,
- double currentB,
- gfx_node_t * node,
- int segment_idx,
- int isx,
- char absChar,
- char relChar)
-{
- if (!svg_is_int_step(lastA, currentA)) {
- putc(absChar, fp);
- svg_write_number(fp, currentA);
- return 0;
- }
- if (segment_idx < node->points - 1) {
- ArtVpath *vec = node->path + segment_idx + 1;
-
- if (vec->code == ART_LINETO) {
- double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
- double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
-
- if (nextB == currentB
- && ((currentA >= lastA) == (nextA >= currentA))
- && svg_is_int_step(currentA, nextA)) {
- return 1; /* skip to next as it is a straight line */
- }
- }
- }
- putc(relChar, fp);
- svg_write_number(fp, currentA - lastA);
- return 0;
-}
-
-static void svg_path(
- FILE * fp,
- gfx_node_t * node,
- int multi)
-{
- int i;
- double lastX = 0, lastY = 0;
-
- /* for straight lines <path..> tags take less space than
- <line..> tags because of the efficient packing
- in the 'd' attribute */
- svg_start_tag(fp, "path");
- if (!multi)
- svg_common_path_attributes(fp, node);
- fputs(" d=\"", fp);
- /* specification of the 'd' attribute: */
- /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
- for (i = 0; i < node->points; i++) {
- ArtVpath *vec = node->path + i;
- double x = vec->x - LINEOFFSET;
- double y = vec->y - LINEOFFSET;
-
- switch (vec->code) {
- case ART_MOVETO_OPEN: /* fall-through */
- case ART_MOVETO:
- putc('M', fp);
- svg_write_number(fp, x);
- putc(',', fp);
- svg_write_number(fp, y);
- break;
- case ART_LINETO:
- /* try optimize filesize by using minimal lineto commands */
- /* without introducing rounding errors. */
- if (x == lastX) {
- if (svg_path_straight_segment
- (fp, lastY, y, x, node, i, 0, 'V', 'v'))
- continue;
- } else if (y == lastY) {
- if (svg_path_straight_segment
- (fp, lastX, x, y, node, i, 1, 'H', 'h'))
- continue;
- } else {
- putc('L', fp);
- svg_write_number(fp, x);
- putc(',', fp);
- svg_write_number(fp, y);
- }
- break;
- case ART_CURVETO:
- break; /* unsupported */
- case ART_END:
- break; /* nop */
- }
- lastX = x;
- lastY = y;
- }
- if (node->closed_path)
- fputs(" Z", fp);
- fputs("\"", fp);
- svg_close_tag_empty_node(fp);
-}
-
-static void svg_multi_path(
- FILE * fp,
- gfx_node_t ** nodeR)
-{
- /* optimize for multiple paths with the same color, penwidth, etc. */
- int num = 1;
- gfx_node_t *node = *nodeR;
- gfx_node_t *next = node->next;
-
- while (next) {
- if (next->type != node->type
- || next->size != node->size
- || next->color != node->color
- || next->dash_on != node->dash_on
- || next->dash_off != node->dash_off)
- break;
- next = next->next;
- num++;
- }
- if (num == 1) {
- svg_path(fp, node, 0);
- return;
- }
- svg_start_tag(fp, "g");
- svg_common_path_attributes(fp, node);
- svg_close_tag(fp);
- while (num && node) {
- svg_path(fp, node, 1);
- if (!--num)
- break;
- node = node->next;
- *nodeR = node;
- }
- svg_end_tag(fp, "g");
-}
-
-static void svg_area(
- FILE * fp,
- gfx_node_t * node)
-{
- int i;
- double startX = 0, startY = 0;
-
- svg_start_tag(fp, "polygon");
- fputs(" ", fp);
- svg_write_color(fp, node->color, "fill");
- fputs(" points=\"", fp);
- for (i = 0; i < node->points; i++) {
- ArtVpath *vec = node->path + i;
- double x = vec->x - LINEOFFSET;
- double y = vec->y - LINEOFFSET;
-
- switch (vec->code) {
- case ART_MOVETO_OPEN: /* fall-through */
- case ART_MOVETO:
- svg_write_number(fp, x);
- putc(',', fp);
- svg_write_number(fp, y);
- startX = x;
- startY = y;
- break;
- case ART_LINETO:
- if (i == node->points - 2
- && node->path[i + 1].code == ART_END
- && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
- break; /* poly area always closed, no need for last point */
- }
- putc(' ', fp);
- svg_write_number(fp, x);
- putc(',', fp);
- svg_write_number(fp, y);
- break;
- case ART_CURVETO:
- break; /* unsupported */
- case ART_END:
- break; /* nop */
- }
- }
- fputs("\"", fp);
- svg_close_tag_empty_node(fp);
-}
-
-static void svg_text(
- FILE * fp,
- gfx_node_t * node)
-{
- pdf_coords g;
- const char *fontname;
-
- /* as svg has 0,0 in top-left corner (like most screens) instead of
- bottom-left corner like pdf and eps, we have to fake the coords
- using offset and inverse sin(r) value */
- int page_height = 1000;
-
- pdf_calc(page_height, node, &g);
- if (node->angle != 0) {
- svg_start_tag(fp, "g");
- /* can't use svg_write_number as 2 decimals is far from enough to avoid
- skewed text */
- fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
- g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
- svg_close_tag(fp);
- }
- svg_start_tag(fp, "text");
- if (!node->angle) {
- fputs(" x=\"", fp);
- svg_write_number(fp, g.tmx);
- fputs("\" y=\"", fp);
- svg_write_number(fp, page_height - g.tmy);
- fputs("\"", fp);
- }
- fontname = afm_get_font_name(node->filename);
- if (strcmp(fontname, svg_default_font))
- fprintf(fp, " font-family=\"%s\"", fontname);
- fputs(" font-size=\"", fp);
- svg_write_number(fp, node->size);
- fputs("\"", fp);
- if (!svg_color_is_black(node->color))
- svg_write_color(fp, node->color, "fill");
- svg_close_tag_single_line(fp);
- /* support for node->tabwidth missing */
- svg_write_text(fp, node->text);
- svg_end_tag(fp, "text");
- if (node->angle != 0)
- svg_end_tag(fp, "g");
-}
-
-int gfx_render_svg(
- gfx_canvas_t * canvas,
- art_u32 width,
- art_u32 height,
- gfx_color_t background,
- FILE * fp)
-{
- gfx_node_t *node = canvas->firstnode;
-
- /* Find the first font used, and assume it is the mostly used
- one. It reduces the number of font-familty attributes. */
- while (node) {
- if (node->type == GFX_TEXT && node->filename) {
- svg_default_font = afm_get_font_name(node->filename);
- break;
- }
- node = node->next;
- }
- fputs("<?xml version=\"1.0\" standalone=\"no\"?>\n"
- "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
- " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
- "<!--\n"
- " SVG file created by\n"
- " RRDtool " PACKAGE_VERSION
- " Tobias Oetiker, http://tobi.oetiker.ch\n" "\n"
- " The width/height attributes in the outhermost svg node\n"
- " are just default sizes for the browser which is used\n"
- " if the svg file is openened directly without being\n"
- " embedded in an html file.\n"
- " The viewBox is the local coord system for rrdtool.\n" "-->\n",
- fp);
- svg_start_tag(fp, "svg");
- fputs(" width=\"", fp);
- svg_write_number(fp, width * canvas->zoom);
- fputs("\" height=\"", fp);
- svg_write_number(fp, height * canvas->zoom);
- fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
- svg_write_number(fp, -LINEOFFSET);
- fputs(" ", fp);
- svg_write_number(fp, -LINEOFFSET);
- fputs(" ", fp);
- svg_write_number(fp, width - LINEOFFSET);
- fputs(" ", fp);
- svg_write_number(fp, height - LINEOFFSET);
- fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
- fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
- fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
- fputs(" xmlns=\"http://www.w3.org/2000/svg\"", fp);
- fputs(" xmlns:xlink=\"http://www.w3.org/1999/xlink\"", fp);
- svg_close_tag(fp);
- svg_start_tag(fp, "rect");
- fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
- svg_write_color(fp, background, "fill");
- svg_close_tag_empty_node(fp);
- node = canvas->firstnode;
- while (node) {
- switch (node->type) {
- case GFX_LINE:
- svg_multi_path(fp, &node);
- break;
- case GFX_AREA:
- svg_area(fp, node);
- break;
- case GFX_TEXT:
- svg_text(fp, node);
- }
- node = node->next;
- }
- svg_end_tag(fp, "svg");
- return 0;
-}
-
-/* ------- EPS -------
- EPS and Postscript references:
- http://partners.adobe.com/asn/developer/technotes/postscript.html
-*/
-
-typedef struct eps_font {
- const char *ps_font;
- int id;
- struct eps_font *next;
-} eps_font;
-
-typedef struct eps_state {
- FILE *fp;
- gfx_canvas_t *canvas;
- art_u32 page_width, page_height;
- eps_font *font_list;
- /*--*/
- gfx_color_t color;
- const char *font;
- double font_size;
- double line_width;
- int linecap, linejoin;
- int has_dash;
-} eps_state;
-
-static void eps_set_color(
- eps_state * state,
- gfx_color_t color)
-{
-#if USE_EPS_FAKE_ALPHA
- double a1, a2;
-#endif
- /* gfx_color_t is RRGGBBAA */
- if (state->color == color)
- return;
-#if USE_EPS_FAKE_ALPHA
- a1 = (color & 255) / 255.0;
- a2 = 255 * (1 - a1);
-#define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
-#else
-#define eps_color_calc(x) (int)( (x) & 255)
-#endif
- /* gfx_color_t is RRGGBBAA */
- if (state->color == color)
- return;
- fprintf(state->fp, "%d %d %d Rgb\n",
- eps_color_calc(color >> 24),
- eps_color_calc(color >> 16), eps_color_calc(color >> 8));
- state->color = color;
-}
-
-static int eps_add_font(
- eps_state * state,
- gfx_node_t * node)
-{
- /* The fonts list could be postponed to the end using
- (atend), but let's be nice and have them in the header. */
- const char *ps_font = afm_get_font_postscript_name(node->filename);
- eps_font *ef;
-
- for (ef = state->font_list; ef; ef = ef->next) {
- if (!strcmp(ps_font, ef->ps_font))
- return 0;
- }
- ef = malloc(sizeof(eps_font));
- if (ef == NULL) {
- rrd_set_error("malloc for eps_font");
- return -1;
- }
- ef->next = state->font_list;
- ef->ps_font = ps_font;
- state->font_list = ef;
- return 0;
-}
-
-static void eps_list_fonts(
- eps_state * state,
- const char *dscName)
-{
- eps_font *ef;
- int lineLen = strlen(dscName);
-
- if (!state->font_list)
- return;
- fputs(dscName, state->fp);
- for (ef = state->font_list; ef; ef = ef->next) {
- int nameLen = strlen(ef->ps_font);
-
- if (lineLen + nameLen > 100 && lineLen) {
- fputs("\n", state->fp);
- fputs("%%- \n", state->fp);
- lineLen = 5;
- } else {
- fputs(" ", state->fp);
- lineLen++;
- }
- fputs(ef->ps_font, state->fp);
- lineLen += nameLen;
- }
- fputs("\n", state->fp);
-}
-
-static void eps_define_fonts(
- eps_state * state)
-{
- eps_font *ef;
-
- if (!state->font_list)
- return;
- for (ef = state->font_list; ef; ef = ef->next) {
- /* PostScript¨ LANGUAGE REFERENCE third edition
- page 349 */
- fprintf(state->fp,
- "%%\n"
- "/%s findfont dup length dict begin\n"
- "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
- "/Encoding ISOLatin1Encoding def\n"
- "currentdict end\n"
- "/%s-ISOLatin1 exch definefont pop\n"
- "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
- ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
- }
-}
-
-static int eps_prologue(
- eps_state * state)
-{
- gfx_node_t *node;
-
- fputs("%!PS-Adobe-3.0 EPSF-3.0\n"
- "%%Creator: RRDtool " PACKAGE_VERSION
- " Tobias Oetiker, http://tobi.oetiker.ch\n"
- /* can't like weird chars here */
- "%%Title: (RRDtool output)\n"
- "%%DocumentData: Clean7Bit\n" "", state->fp);
- fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
- state->page_width, state->page_height);
- for (node = state->canvas->firstnode; node; node = node->next) {
- if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
- return -1;
- }
- eps_list_fonts(state, "%%DocumentFonts:");
- eps_list_fonts(state, "%%DocumentNeededFonts:");
- fputs("%%EndComments\n" "%%BeginProlog\n" "%%EndProlog\n" /* must have, or BoundingBox is ignored */
- "/bd { bind def } bind def\n" "", state->fp);
- fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
- fputs("/X2 {X exch X exch} bd\n"
- "/M {X2 moveto} bd\n"
- "/L {X2 lineto} bd\n"
- "/m {moveto} bd\n"
- "/l {lineto} bd\n"
- "/S {stroke} bd\n"
- "/CP {closepath} bd\n"
- "/WS {setlinewidth stroke} bd\n"
- "/F {fill} bd\n"
- "/T1 {gsave} bd\n"
- "/T2 {concat 0 0 moveto show grestore} bd\n"
- "/T {moveto show} bd\n"
- "/Rgb { 255.0 div 3 1 roll\n"
- " 255.0 div 3 1 roll \n"
- " 255.0 div 3 1 roll setrgbcolor } bd\n" "", state->fp);
- eps_define_fonts(state);
- return 0;
-}
-
-static void eps_clear_dash(
- eps_state * state)
-{
- if (!state->has_dash)
- return;
- state->has_dash = 0;
- fputs("[1 0] 0 setdash\n", state->fp);
-}
-
-static void eps_write_linearea(
- eps_state * state,
- gfx_node_t * node)
-{
- int i;
- FILE *fp = state->fp;
- int useOffset = 0;
- int clearDashIfAny = 1;
-
- eps_set_color(state, node->color);
- if (node->type == GFX_LINE) {
- svg_dash dash_info;
-
- if (state->linecap != 1) {
- fputs("1 setlinecap\n", fp);
- state->linecap = 1;
- }
- if (state->linejoin != 1) {
- fputs("1 setlinejoin\n", fp);
- state->linejoin = 1;
- }
- svg_get_dash(node, &dash_info);
- if (dash_info.dash_enable) {
- clearDashIfAny = 0;
- state->has_dash = 1;
- fputs("[", fp);
- svg_write_number(fp, dash_info.adjusted_on);
- fputs(" ", fp);
- svg_write_number(fp, dash_info.adjusted_off);
- fputs("] ", fp);
- svg_write_number(fp, dash_info.dash_offset);
- fputs(" setdash\n", fp);
- }
- }
- if (clearDashIfAny)
- eps_clear_dash(state);
- for (i = 0; i < node->points; i++) {
- ArtVpath *vec = node->path + i;
- double x = vec->x;
- double y = state->page_height - vec->y;
-
- if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
- useOffset = (fabs(x - floor(x) - 0.5) < 0.01
- && fabs(y - floor(y) - 0.5) < 0.01);
- if (useOffset) {
- x -= LINEOFFSET;
- y -= LINEOFFSET;
- }
- switch (vec->code) {
- case ART_MOVETO_OPEN: /* fall-through */
- case ART_MOVETO:
- svg_write_number(fp, x);
- fputc(' ', fp);
- svg_write_number(fp, y);
- fputc(' ', fp);
- fputs(useOffset ? "M\n" : "m\n", fp);
- break;
- case ART_LINETO:
- svg_write_number(fp, x);
- fputc(' ', fp);
- svg_write_number(fp, y);
- fputc(' ', fp);
- fputs(useOffset ? "L\n" : "l\n", fp);
- break;
- case ART_CURVETO:
- break; /* unsupported */
- case ART_END:
- break; /* nop */
- }
- }
- if (node->type == GFX_LINE) {
- if (node->closed_path)
- fputs("CP ", fp);
- if (node->size != state->line_width) {
- state->line_width = node->size;
- svg_write_number(fp, state->line_width);
- fputs(" WS\n", fp);
- } else {
- fputs("S\n", fp);
- }
- } else {
- fputs("F\n", fp);
- }
-}
-
-static void eps_write_text(
- eps_state * state,
- gfx_node_t * node)
-{
- FILE *fp = state->fp;
- const char *ps_font = afm_get_font_postscript_name(node->filename);
- int lineLen = 0;
- pdf_coords g;
-
-#ifdef HAVE_MBSTOWCS
- size_t clen;
- wchar_t *p, *cstr, ch;
- int text_count;
-
- if (!node->text)
- return;
- clen = strlen(node->text) + 1;
- cstr = malloc(sizeof(wchar_t) * clen);
- text_count = mbstowcs(cstr, node->text, clen);
- if (text_count == -1)
- text_count = mbstowcs(cstr, "Enc-Err", 6);
- p = cstr;
-#else
- const unsigned char *p = node->text;
- unsigned char ch;
-
- if (!p)
- return;
-#endif
- pdf_calc(state->page_height, node, &g);
- eps_set_color(state, node->color);
- if (strcmp(ps_font, state->font) || node->size != state->font_size) {
- state->font = ps_font;
- state->font_size = node->size;
- svg_write_number(fp, state->font_size);
- fprintf(fp, " SetFont-%s\n", state->font);
- }
- if (node->angle)
- fputs("T1 ", fp);
- fputs("(", fp);
- lineLen = 20;
- while (1) {
- ch = *p;
- if (!ch)
- break;
- ch = afm_fix_osx_charset(ch); /* unsafe macro */
- if (++lineLen > 70) {
- fputs("\\\n", fp); /* backslash and \n */
- lineLen = 0;
- }
- switch (ch) {
- case '%':
- case '(':
- case ')':
- case '\\':
- fputc('\\', fp);
- fputc(ch, fp);
- break;
- case '\n':
- fputs("\\n", fp);
- break;
- case '\r':
- fputs("\\r", fp);
- break;
- case '\t':
- fputs("\\t", fp);
- break;
- default:
- if (ch > 255) {
- fputc('?', fp);
- } else if (ch >= 126 || ch < 32) {
- fprintf(fp, "\\%03o", (unsigned int) ch);
- lineLen += 3;
- } else {
- fputc(ch, fp);
- }
- }
- p++;
- }
-#ifdef HAVE_MBSTOWCS
- free(cstr);
-#endif
- if (node->angle) {
- /* can't use svg_write_number as 2 decimals is far from enough to avoid
- skewed text */
- fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
- g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
- } else {
- fputs(") ", fp);
- svg_write_number(fp, g.tmx);
- fputs(" ", fp);
- svg_write_number(fp, g.tmy);
- fputs(" T\n", fp);
- }
-}
-
-static int eps_write_content(
- eps_state * state)
-{
- gfx_node_t *node;
-
- fputs("%\n", state->fp);
- for (node = state->canvas->firstnode; node; node = node->next) {
- switch (node->type) {
- case GFX_LINE:
- case GFX_AREA:
- eps_write_linearea(state, node);
- break;
- case GFX_TEXT:
- eps_write_text(state, node);
- break;
- }
- }
- return 0;
-}
-
-int gfx_render_eps(
- gfx_canvas_t * canvas,
- art_u32 width,
- art_u32 height,
- gfx_color_t background,
- FILE * fp)
-{
- struct eps_state state;
-
- state.fp = fp;
- state.canvas = canvas;
- state.page_width = width;
- state.page_height = height;
- state.font = "no-default-font";
- state.font_size = -1;
- state.color = 0; /* black */
- state.font_list = NULL;
- state.linecap = -1;
- state.linejoin = -1;
- state.has_dash = 0;
- state.line_width = 1;
- if (eps_prologue(&state) == -1)
- return -1;
- eps_set_color(&state, background);
- fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
- height, width, height, width);
- if (eps_write_content(&state) == -1)
- return 0;
- fputs("showpage\n", fp);
- fputs("%%EOF\n", fp);
- while (state.font_list) {
- eps_font *next = state.font_list->next;
-
- free(state.font_list);
- state.font_list = next;
- }
- return 0;
-}
-
-/* ------- PDF -------
- PDF references page:
- http://partners.adobe.com/public/developer/pdf/index_reference.html
-*/
-
-typedef struct pdf_buffer {
- int id, is_obj, is_dict, is_stream, pdf_file_pos;
- char *data;
- int alloc_size, current_size;
- struct pdf_buffer *previous_buffer, *next_buffer;
- struct pdf_state *state;
-} pdf_buffer;
-
-typedef struct pdf_font {
- const char *ps_font;
- pdf_buffer obj;
- struct pdf_font *next;
-} pdf_font;
-
-typedef struct pdf_state {
- FILE *fp;
- gfx_canvas_t *canvas;
- art_u32 page_width, page_height;
- pdf_font *font_list;
- pdf_buffer *first_buffer, *last_buffer;
- int pdf_file_pos;
- int has_failed;
- /*--*/
- gfx_color_t stroke_color, fill_color;
- int font_id;
- double font_size;
- double line_width;
- svg_dash dash;
- int linecap, linejoin;
- int last_obj_id;
- /*--*/
- pdf_buffer pdf_header;
- pdf_buffer info_obj, catalog_obj, pages_obj, page1_obj;
- pdf_buffer fontsdict_obj;
- pdf_buffer graph_stream;
-} pdf_state;
-
-static void pdf_init_buffer(
- pdf_state * state,
- pdf_buffer * buf)
-{
- int initial_size = 32;
-
- buf->state = state;
- buf->id = -42;
- buf->alloc_size = 0;
- buf->current_size = 0;
- buf->data = (char *) malloc(initial_size);
- buf->is_obj = 0;
- buf->previous_buffer = NULL;
- buf->next_buffer = NULL;
- if (buf->data == NULL) {
- rrd_set_error("malloc for pdf_buffer data");
- state->has_failed = 1;
- return;
- }
- buf->alloc_size = initial_size;
- if (state->last_buffer)
- state->last_buffer->next_buffer = buf;
- if (state->first_buffer == NULL)
- state->first_buffer = buf;
- buf->previous_buffer = state->last_buffer;
- state->last_buffer = buf;
-}
-
-static void pdf_put(
- pdf_buffer * buf,
- const char *text,
- int len)
-{
- if (len <= 0)
- return;
- if (buf->alloc_size < buf->current_size + len) {
- int new_size = buf->alloc_size;
- char *new_buf;
-
- while (new_size < buf->current_size + len)
- new_size *= 4;
- new_buf = (char *) malloc(new_size);
- if (new_buf == NULL) {
- rrd_set_error("re-malloc for pdf_buffer data");
- buf->state->has_failed = 1;
- return;
- }
- memcpy(new_buf, buf->data, buf->current_size);
- free(buf->data);
- buf->data = new_buf;
- buf->alloc_size = new_size;
- }
- memcpy(buf->data + buf->current_size, text, len);
- buf->current_size += len;
-}
-
-static void pdf_put_char(
- pdf_buffer * buf,
- char c)
-{
- if (buf->alloc_size >= buf->current_size + 1) {
- buf->data[buf->current_size++] = c;
- } else {
- char tmp[1];
-
- tmp[0] = (char) c;
- pdf_put(buf, tmp, 1);
- }
-}
-
-static void pdf_puts(
- pdf_buffer * buf,
- const char *text)
-{
- pdf_put(buf, text, strlen(text));
-}
-
-static void pdf_indent(
- pdf_buffer * buf)
-{
- pdf_puts(buf, "\t");
-}
-
-static void pdf_putsi(
- pdf_buffer * buf,
- const char *text)
-{
- pdf_indent(buf);
- pdf_puts(buf, text);
-}
-
-static void pdf_putint(
- pdf_buffer * buf,
- int i)
-{
- char tmp[20];
-
- sprintf(tmp, "%d", i);
- pdf_puts(buf, tmp);
-}
-
-static void pdf_putnumber(
- pdf_buffer * buf,
- double d)
-{
- char tmp[50];
-
- svg_format_number(tmp, sizeof(tmp), d);
- pdf_puts(buf, tmp);
-}
-
-static void pdf_put_string_contents_wide(
- pdf_buffer * buf,
- const afm_char * text)
-{
- const afm_char *p = text;
-
- while (1) {
- afm_char ch = *p;
-
- ch = afm_fix_osx_charset(ch); /* unsafe macro */
- switch (ch) {
- case 0:
- return;
- case '(':
- pdf_puts(buf, "\\(");
- break;
- case ')':
- pdf_puts(buf, "\\)");
- break;
- case '\\':
- pdf_puts(buf, "\\\\");
- break;
- case '\n':
- pdf_puts(buf, "\\n");
- break;
- case '\r':
- pdf_puts(buf, "\\r");
- break;
- case '\t':
- pdf_puts(buf, "\\t");
- break;
- default:
- if (ch > 255) {
- pdf_put_char(buf, '?');
- } else if (ch > 125 || ch < 32) {
- pdf_put_char(buf, ch);
- } else {
- char tmp[10];
-
- snprintf(tmp, sizeof(tmp), "\\%03o", (int) ch);
- pdf_puts(buf, tmp);
- }
- }
- p++;
- }
-}
-
-static void pdf_put_string_contents(
- pdf_buffer * buf,
- const char *text)
-{
-#ifdef HAVE_MBSTOWCS
- size_t clen = strlen(text) + 1;
- wchar_t *cstr = malloc(sizeof(wchar_t) * clen);
- int text_count = mbstowcs(cstr, text, clen);
-
- if (text_count == -1)
- text_count = mbstowcs(cstr, "Enc-Err", 6);
- pdf_put_string_contents_wide(buf, cstr);
-#if 0
- if (*text == 'W') {
- fprintf(stderr, "Decoding utf8 for '%s'\n", text);
- wchar_t *p = cstr;
- char *pp = text;
-
- fprintf(stderr, "sz wc = %d\n", sizeof(wchar_t));
- while (*p) {
- fprintf(stderr, " %d = %c versus %d = %c\n", *p, (char) *p,
- 255 & (int) *pp, *pp);
- p++;
- pp++;
- }
- }
-#endif
- free(cstr);
-#else
- pdf_put_string_contents_wide(buf, text);
-#endif
-}
-
-static void pdf_init_object(
- pdf_state * state,
- pdf_buffer * buf)
-{
- pdf_init_buffer(state, buf);
- buf->id = ++state->last_obj_id;
- buf->is_obj = 1;
- buf->is_stream = 0;
-}
-
-static void pdf_init_dict(
- pdf_state * state,
- pdf_buffer * buf)
-{
- pdf_init_object(state, buf);
- buf->is_dict = 1;
-}
-
-static void pdf_set_color(
- pdf_buffer * buf,
- gfx_color_t color,
- gfx_color_t * current_color,
- const char *op)
-{
-#if USE_PDF_FAKE_ALPHA
- double a1, a2;
-#endif
- /* gfx_color_t is RRGGBBAA */
- if (*current_color == color)
- return;
-#if USE_PDF_FAKE_ALPHA
- a1 = (color & 255) / 255.0;
- a2 = 1 - a1;
-#define pdf_color_calc(x) ( ((x) & 255) / 255.0 * a1 + a2)
-#else
-#define pdf_color_calc(x) ( ((x) & 255) / 255.0)
-#endif
- pdf_putnumber(buf, pdf_color_calc(color >> 24));
- pdf_puts(buf, " ");
- pdf_putnumber(buf, pdf_color_calc(color >> 16));
- pdf_puts(buf, " ");
- pdf_putnumber(buf, pdf_color_calc(color >> 8));
- pdf_puts(buf, " ");
- pdf_puts(buf, op);
- pdf_puts(buf, "\n");
- *current_color = color;
-}
-
-static void pdf_set_stroke_color(
- pdf_buffer * buf,
- gfx_color_t color)
-{
- pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
-}
-
-static void pdf_set_fill_color(
- pdf_buffer * buf,
- gfx_color_t color)
-{
- pdf_set_color(buf, color, &buf->state->fill_color, "rg");
-}
-
-static pdf_font *pdf_find_font(
- pdf_state * state,
- gfx_node_t * node)
-{
- const char *ps_font = afm_get_font_postscript_name(node->filename);
- pdf_font *ef;
-
- for (ef = state->font_list; ef; ef = ef->next) {
- if (!strcmp(ps_font, ef->ps_font))
- return ef;
- }
- return NULL;
-}
-
-static void pdf_add_font(
- pdf_state * state,
- gfx_node_t * node)
-{
- pdf_font *ef = pdf_find_font(state, node);
-
- if (ef)
- return;
- ef = malloc(sizeof(pdf_font));
- if (ef == NULL) {
- rrd_set_error("malloc for pdf_font");
- state->has_failed = 1;
- return;
- }
- pdf_init_dict(state, &ef->obj);
- ef->next = state->font_list;
- ef->ps_font = afm_get_font_postscript_name(node->filename);
- state->font_list = ef;
- /* fonts dict */
- pdf_putsi(&state->fontsdict_obj, "/F");
- pdf_putint(&state->fontsdict_obj, ef->obj.id);
- pdf_puts(&state->fontsdict_obj, " ");
- pdf_putint(&state->fontsdict_obj, ef->obj.id);
- pdf_puts(&state->fontsdict_obj, " 0 R\n");
- /* fonts def */
- pdf_putsi(&ef->obj, "/Type /Font\n");
- pdf_putsi(&ef->obj, "/Subtype /Type1\n");
- pdf_putsi(&ef->obj, "/Name /F");
- pdf_putint(&ef->obj, ef->obj.id);
- pdf_puts(&ef->obj, "\n");
- pdf_putsi(&ef->obj, "/BaseFont /");
- pdf_puts(&ef->obj, ef->ps_font);
- pdf_puts(&ef->obj, "\n");
- pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
- /* 'Cp1252' (this is latin 1 extended with 27 characters;
- the encoding is also known as 'winansi')
- http://www.lowagie.com/iText/tutorial/ch09.html */
-}
-
-static void pdf_create_fonts(
- pdf_state * state)
-{
- gfx_node_t *node;
-
- for (node = state->canvas->firstnode; node; node = node->next) {
- if (node->type == GFX_TEXT)
- pdf_add_font(state, node);
- }
-}
-
-static void pdf_write_linearea(
- pdf_state * state,
- gfx_node_t * node)
-{
- int i;
- pdf_buffer *s = &state->graph_stream;
-
- if (node->type == GFX_LINE) {
- svg_dash dash_info;
-
- svg_get_dash(node, &dash_info);
- if (!svg_dash_equal(&dash_info, &state->dash)) {
- state->dash = dash_info;
- if (dash_info.dash_enable) {
- pdf_puts(s, "[");
- pdf_putnumber(s, dash_info.adjusted_on);
- pdf_puts(s, " ");
- pdf_putnumber(s, dash_info.adjusted_off);
- pdf_puts(s, "] ");
- pdf_putnumber(s, dash_info.dash_offset);
- pdf_puts(s, " d\n");
- } else {
- pdf_puts(s, "[] 0 d\n");
- }
- }
- pdf_set_stroke_color(s, node->color);
- if (state->linecap != 1) {
- pdf_puts(s, "1 j\n");
- state->linecap = 1;
- }
- if (state->linejoin != 1) {
- pdf_puts(s, "1 J\n");
- state->linejoin = 1;
- }
- if (node->size != state->line_width) {
- state->line_width = node->size;
- pdf_putnumber(s, state->line_width);
- pdf_puts(s, " w\n");
- }
- } else {
- pdf_set_fill_color(s, node->color);
- }
- for (i = 0; i < node->points; i++) {
- ArtVpath *vec = node->path + i;
- double x = vec->x;
- double y = state->page_height - vec->y;
-
- if (node->type == GFX_AREA) {
- x += LINEOFFSET; /* adjust for libart handling of areas */
- y -= LINEOFFSET;
- }
- switch (vec->code) {
- case ART_MOVETO_OPEN: /* fall-through */
- case ART_MOVETO:
- pdf_putnumber(s, x);
- pdf_puts(s, " ");
- pdf_putnumber(s, y);
- pdf_puts(s, " m\n");
- break;
- case ART_LINETO:
- pdf_putnumber(s, x);
- pdf_puts(s, " ");
- pdf_putnumber(s, y);
- pdf_puts(s, " l\n");
- break;
- case ART_CURVETO:
- break; /* unsupported */
- case ART_END:
- break; /* nop */
- }
- }
- if (node->type == GFX_LINE) {
- pdf_puts(s, node->closed_path ? "s\n" : "S\n");
- } else {
- pdf_puts(s, "f\n");
- }
-}
-
-
-static void pdf_write_matrix(
- pdf_state * state,
- gfx_node_t * node,
- pdf_coords * g,
- int useTM)
-{
- char tmp[150];
- pdf_buffer *s = &state->graph_stream;
-
- if (node->angle == 0) {
- pdf_puts(s, "1 0 0 1 ");
- pdf_putnumber(s, useTM ? g->tmx : g->mx);
- pdf_puts(s, " ");
- pdf_putnumber(s, useTM ? g->tmy : g->my);
- } else {
- /* can't use svg_write_number as 2 decimals is far from enough to avoid
- skewed text */
- sprintf(tmp, "%f %f %f %f %f %f",
- g->ma, g->mb, g->mc, g->md,
- useTM ? g->tmx : g->mx, useTM ? g->tmy : g->my);
- pdf_puts(s, tmp);
- }
-}
-
-static void pdf_write_text(
- pdf_state * state,
- gfx_node_t * node,
- int last_was_text,
- int next_is_text)
-{
- pdf_coords g;
- pdf_buffer *s = &state->graph_stream;
- pdf_font *font = pdf_find_font(state, node);
-
- if (font == NULL) {
- rrd_set_error("font disappeared");
- state->has_failed = 1;
- return;
- }
- pdf_calc(state->page_height, node, &g);
-#if PDF_CALC_DEBUG
- pdf_puts(s, "q % debug green box\n");
- pdf_write_matrix(state, node, &g, 0);
- pdf_puts(s, " cm\n");
- pdf_set_fill_color(s, 0x90FF9000);
- pdf_puts(s, "0 0.4 0 rg\n");
- pdf_puts(s, "0 0 ");
- pdf_putnumber(s, g.sizep.x);
- pdf_puts(s, " ");
- pdf_putnumber(s, g.sizep.y);
- pdf_puts(s, " re\n");
- pdf_puts(s, "f\n");
- pdf_puts(s, "Q\n");
-#endif
- pdf_set_fill_color(s, node->color);
- if (PDF_CALC_DEBUG || !last_was_text)
- pdf_puts(s, "BT\n");
- if (state->font_id != font->obj.id || node->size != state->font_size) {
- state->font_id = font->obj.id;
- state->font_size = node->size;
- pdf_puts(s, "/F");
- pdf_putint(s, font->obj.id);
- pdf_puts(s, " ");
- pdf_putnumber(s, node->size);
- pdf_puts(s, " Tf\n");
- }
- pdf_write_matrix(state, node, &g, 1);
- pdf_puts(s, " Tm\n");
- pdf_puts(s, "(");
- pdf_put_string_contents(s, node->text);
- pdf_puts(s, ") Tj\n");
- if (PDF_CALC_DEBUG || !next_is_text)
- pdf_puts(s, "ET\n");
-}
-
-static void pdf_write_content(
- pdf_state * state)
-{
- gfx_node_t *node;
- int last_was_text = 0, next_is_text;
-
- for (node = state->canvas->firstnode; node; node = node->next) {
- switch (node->type) {
- case GFX_LINE:
- case GFX_AREA:
- pdf_write_linearea(state, node);
- break;
- case GFX_TEXT:
- next_is_text = node->next && node->next->type == GFX_TEXT;
- pdf_write_text(state, node, last_was_text, next_is_text);
- break;
- }
- last_was_text = node->type == GFX_TEXT;
- }
-}
-
-static void pdf_init_document(
- pdf_state * state)
-{
- pdf_init_buffer(state, &state->pdf_header);
- pdf_init_dict(state, &state->catalog_obj);
- pdf_init_dict(state, &state->info_obj);
- pdf_init_dict(state, &state->pages_obj);
- pdf_init_dict(state, &state->page1_obj);
- pdf_init_dict(state, &state->fontsdict_obj);
- pdf_create_fonts(state);
- if (state->has_failed)
- return;
- /* make stream last object in file */
- pdf_init_object(state, &state->graph_stream);
- state->graph_stream.is_stream = 1;
-}
-
-static void pdf_setup_document(
- pdf_state * state)
-{
- const char *creator =
- "RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch";
- /* all objects created by now, so init code can reference them */
- /* HEADER */
- pdf_puts(&state->pdf_header, "%PDF-1.3\n");
- /* following 8 bit comment is recommended by Adobe for
- indicating binary file to file transfer applications */
- pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
- /* INFO */
- pdf_putsi(&state->info_obj, "/Creator (");
- pdf_put_string_contents(&state->info_obj, creator);
- pdf_puts(&state->info_obj, ")\n");
- /* CATALOG */
- pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
- pdf_putsi(&state->catalog_obj, "/Pages ");
- pdf_putint(&state->catalog_obj, state->pages_obj.id);
- pdf_puts(&state->catalog_obj, " 0 R\n");
- /* PAGES */
- pdf_putsi(&state->pages_obj, "/Type /Pages\n");
- pdf_putsi(&state->pages_obj, "/Kids [");
- pdf_putint(&state->pages_obj, state->page1_obj.id);
- pdf_puts(&state->pages_obj, " 0 R]\n");
- pdf_putsi(&state->pages_obj, "/Count 1\n");
- /* PAGE 1 */
- pdf_putsi(&state->page1_obj, "/Type /Page\n");
- pdf_putsi(&state->page1_obj, "/Parent ");
- pdf_putint(&state->page1_obj, state->pages_obj.id);
- pdf_puts(&state->page1_obj, " 0 R\n");
- pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
- pdf_putint(&state->page1_obj, state->page_width);
- pdf_puts(&state->page1_obj, " ");
- pdf_putint(&state->page1_obj, state->page_height);
- pdf_puts(&state->page1_obj, "]\n");
- pdf_putsi(&state->page1_obj, "/Contents ");
- pdf_putint(&state->page1_obj, state->graph_stream.id);
- pdf_puts(&state->page1_obj, " 0 R\n");
- pdf_putsi(&state->page1_obj, "/Resources << /Font ");
- pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
- pdf_puts(&state->page1_obj, " 0 R >>\n");
-}
-
-static void pdf_write_string_to_file(
- pdf_state * state,
- const char *text)
-{
- fputs(text, state->fp);
- state->pdf_file_pos += strlen(text);
-}
-
-static void pdf_write_buf_to_file(
- pdf_state * state,
- pdf_buffer * buf)
-{
- char tmp[40];
-
- buf->pdf_file_pos = state->pdf_file_pos;
- if (buf->is_obj) {
- snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
- pdf_write_string_to_file(state, tmp);
- }
- if (buf->is_dict)
- pdf_write_string_to_file(state, "<<\n");
- if (buf->is_stream) {
- snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
- pdf_write_string_to_file(state, tmp);
- pdf_write_string_to_file(state, "stream\n");
- }
- fwrite(buf->data, 1, buf->current_size, state->fp);
- state->pdf_file_pos += buf->current_size;
- if (buf->is_stream)
- pdf_write_string_to_file(state, "endstream\n");
- if (buf->is_dict)
- pdf_write_string_to_file(state, ">>\n");
- if (buf->is_obj)
- pdf_write_string_to_file(state, "endobj\n");
-}
-
-static void pdf_write_to_file(
- pdf_state * state)
-{
- pdf_buffer *buf = state->first_buffer;
- int xref_pos;
-
- state->pdf_file_pos = 0;
- pdf_write_buf_to_file(state, &state->pdf_header);
- while (buf) {
- if (buf->is_obj)
- pdf_write_buf_to_file(state, buf);
- buf = buf->next_buffer;
- }
- xref_pos = state->pdf_file_pos;
- fprintf(state->fp, "xref\n");
- fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
- /* TOC lines must be exactly 20 bytes including \n */
- fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
- for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
- if (buf->is_obj)
- fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
- }
- fprintf(state->fp, "trailer\n");
- fprintf(state->fp, "<<\n");
- fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
- fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
- fprintf(state->fp, "\t/Info %d 0 R\n", state->info_obj.id);
- fprintf(state->fp, ">>\n");
- fprintf(state->fp, "startxref\n");
- fprintf(state->fp, "%d\n", xref_pos);
- fputs("%%EOF\n", state->fp);
-}
-
-static void pdf_free_resources(
- pdf_state * state)
-{
- pdf_buffer *buf = state->first_buffer;
-
- while (buf) {
- free(buf->data);
- buf->data = NULL;
- buf->alloc_size = buf->current_size = 0;
- buf = buf->next_buffer;
- }
- while (state->font_list) {
- pdf_font *next = state->font_list->next;
-
- free(state->font_list);
- state->font_list = next;
- }
-}
-
-int gfx_render_pdf(
- gfx_canvas_t * canvas,
- art_u32 width,
- art_u32 height,
- gfx_color_t UNUSED(background),
- FILE * fp)
-{
- struct pdf_state state;
-
- memset(&state, 0, sizeof(pdf_state));
- state.fp = fp;
- state.canvas = canvas;
- state.page_width = width;
- state.page_height = height;
- state.font_id = -1;
- state.font_size = -1;
- state.font_list = NULL;
- state.linecap = -1;
- state.linejoin = -1;
- pdf_init_document(&state);
- /*
- pdf_set_color(&state, background);
- fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
- height, width, height, width);
- */
- if (!state.has_failed)
- pdf_write_content(&state);
- if (!state.has_failed)
- pdf_setup_document(&state);
- if (!state.has_failed)
- pdf_write_to_file(&state);
- pdf_free_resources(&state);
- return state.has_failed ? -1 : 0;