+
+
+/* ----- COMMON ROUTINES for pdf, svg and eps */
+#define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
+#define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
+
+#define PDF_CALC_DEBUG 0
+
+typedef struct pdf_point
+{
+ double x, y;
+} pdf_point;
+
+typedef struct
+{
+ double ascender, descender, baselineY;
+ pdf_point sizep, minp, maxp;
+ double x, y, tdx, tdy;
+ double r, cos_r, sin_r;
+ double ma, mb, mc, md, mx, my; /* pdf coord matrix */
+ double tmx, tmy; /* last 2 coords of text coord matrix */
+#if PDF_CALC_DEBUG
+ int debug;
+#endif
+} pdf_coords;
+
+#if PDF_CALC_DEBUG
+static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
+{
+ fprintf(stderr, "PDF CALC =============================\n");
+ fprintf(stderr, " '%s' at %f pt\n", node->text, node->size);
+ fprintf(stderr, " align h = %s, v = %s, sizep = %f, %f\n",
+ (node->halign == GFX_H_RIGHT ? "r" :
+ (node->halign == GFX_H_CENTER ? "c" :
+ (node->halign == GFX_H_LEFT ? "l" : "N"))),
+ (node->valign == GFX_V_TOP ? "t" :
+ (node->valign == GFX_V_CENTER ? "c" :
+ (node->valign == GFX_V_BOTTOM ? "b" : "N"))),
+ g->sizep.x, g->sizep.y);
+ fprintf(stderr, " r = %f = %f, cos = %f, sin = %f\n",
+ g->r, node->angle, g->cos_r, g->sin_r);
+ fprintf(stderr, " ascender = %f, descender = %f, baselineY = %f\n",
+ g->ascender, g->descender, g->baselineY);
+ fprintf(stderr, " sizep: %f, %f\n", g->sizep.x, g->sizep.y);
+ fprintf(stderr, " minp: %f, %f maxp = %f, %f\n",
+ g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
+ fprintf(stderr, " x = %f, y = %f\n", g->x, g->y);
+ fprintf(stderr, " tdx = %f, tdy = %f\n", g->tdx, g->tdy);
+ fprintf(stderr, " GM = %f, %f, %f, %f, %f, %f\n",
+ g->ma, g->mb, g->mc, g->md, g->mx, g->my);
+ fprintf(stderr, " TM = %f, %f, %f, %f, %f, %f\n",
+ g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
+}
+#endif
+
+#if PDF_CALC_DEBUG
+#define PDF_DD(x) if (g->debug) x;
+#else
+#define PDF_DD(x)
+#endif
+
+static void pdf_rotate(pdf_coords *g, pdf_point *p)
+{
+ double x2 = g->cos_r * p->x - g->sin_r * p->y;
+ double y2 = g->sin_r * p->x + g->cos_r * p->y;
+ PDF_DD( fprintf(stderr, " rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
+ p->x = x2;
+ p->y = y2;
+}
+
+
+static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
+{
+ pdf_point a, b, c;
+#if PDF_CALC_DEBUG
+ /* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
+ g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
+#endif
+ g->x = node->x;
+ g->y = page_height - node->y;
+ if (node->angle) {
+ g->r = 2 * M_PI * node->angle / 360.0;
+ g->cos_r = cos(g->r);
+ g->sin_r = sin(g->r);
+ } else {
+ g->r = 0;
+ g->cos_r = 1;
+ g->sin_r = 0;
+ }
+ g->ascender = afm_get_ascender(node->filename, node->size);
+ g->descender = afm_get_descender(node->filename, node->size);
+ g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
+ /* seems like libart ignores the descender when doing vertial-align = bottom,
+ so we do that too, to get labels v-aligning properly */
+ g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
+ g->baselineY = -g->ascender - g->sizep.y / 2;
+ a.x = g->sizep.x; a.y = g->sizep.y;
+ b.x = g->sizep.x; b.y = 0;
+ c.x = 0; c.y = g->sizep.y;
+ if (node->angle) {
+ pdf_rotate(g, &a);
+ pdf_rotate(g, &b);
+ pdf_rotate(g, &c);
+ }
+ g->minp.x = min3(a.x, b.x, c.x);
+ g->minp.y = min3(a.y, b.y, c.y);
+ g->maxp.x = max3(a.x, b.x, c.x);
+ g->maxp.y = max3(a.y, b.y, c.y);
+ /* The alignment parameters in node->valign and node->halign
+ specifies the alignment in the non-rotated coordinate system
+ (very unlike pdf/postscript), which complicates matters.
+ */
+ switch (node->halign) {
+ case GFX_H_RIGHT: g->tdx = -g->maxp.x; break;
+ case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
+ case GFX_H_LEFT: g->tdx = -g->minp.x; break;
+ case GFX_H_NULL: g->tdx = 0; break;
+ }
+ switch(node->valign){
+ case GFX_V_TOP: g->tdy = -g->maxp.y; break;
+ case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
+ case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
+ case GFX_V_NULL: g->tdy = 0; break;
+ }
+ g->ma = g->cos_r;
+ g->mb = g->sin_r;
+ g->mc = -g->sin_r;
+ g->md = g->cos_r;
+ g->mx = g->x + g->tdx;
+ g->my = g->y + g->tdy;
+ g->tmx = g->mx - g->ascender * g->mc;
+ g->tmy = g->my - g->ascender * g->md;
+ PDF_DD(pdf_dump_calc(node, g))
+}
+
+/* ------- SVG -------
+ SVG reference:
+ http://www.w3.org/TR/SVG/
+*/
+static int svg_indent = 0;
+static int svg_single_line = 0;
+static const char *svg_default_font = "-dummy-";
+typedef struct svg_dash
+{
+ int dash_enable;
+ double dash_adjust, dash_len, dash_offset;
+ double adjusted_on, adjusted_off;
+} svg_dash;
+
+
+static void svg_print_indent(FILE *fp)
+{
+ int i;
+ for (i = svg_indent - svg_single_line; i > 0; i--) {
+ putc(' ', fp);
+ putc(' ', fp);
+ }
+}
+
+static void svg_start_tag(FILE *fp, const char *name)
+{
+ svg_print_indent(fp);
+ putc('<', fp);
+ fputs(name, fp);
+ svg_indent++;
+}
+
+static void svg_close_tag_single_line(FILE *fp)
+{
+ svg_single_line++;
+ putc('>', fp);
+}
+
+static void svg_close_tag(FILE *fp)
+{
+ putc('>', fp);
+ if (!svg_single_line)
+ putc('\n', fp);
+}
+
+static void svg_end_tag(FILE *fp, const char *name)
+{
+ /* name is NULL if closing empty-node tag */
+ svg_indent--;
+ if (svg_single_line)
+ svg_single_line--;
+ else if (name)
+ svg_print_indent(fp);
+ if (name != NULL) {
+ fputs("</", fp);
+ fputs(name, fp);
+ } else {
+ putc('/', fp);
+ }
+ svg_close_tag(fp);
+}
+
+static void svg_close_tag_empty_node(FILE *fp)
+{
+ svg_end_tag(fp, NULL);
+}
+
+static void svg_write_text(FILE *fp, const char *text)
+{
+ const unsigned char *p, *start, *last;
+ unsigned int ch;
+ p = (const unsigned char*)text;
+ if (!p)
+ return;
+ /* trim leading spaces */
+ while (*p == ' ')
+ p++;
+ start = p;
+ /* trim trailing spaces */
+ last = p - 1;
+ while ((ch = *p) != 0) {
+ if (ch != ' ')
+ last = p;
+ p++;
+ }
+ /* encode trimmed text */
+ p = start;
+ while (p <= last) {
+ ch = *p++;
+ ch = afm_host2unicode(ch); /* unsafe macro */
+ switch (ch) {
+ case '&': fputs("&", fp); break;
+ case '<': fputs("<", fp); break;
+ case '>': fputs(">", fp); break;
+ case '"': fputs(""", fp); break;
+ default:
+ if (ch >= 127)
+ fprintf(fp, "&#%d;", ch);
+ else
+ putc(ch, fp);
+ }
+ }
+}
+
+static void svg_format_number(char *buf, int bufsize, double d)
+{
+ /* omit decimals if integer to reduce filesize */
+ char *p;
+ snprintf(buf, bufsize, "%.2f", d);
+ p = buf; /* doesn't trust snprintf return value */
+ while (*p)
+ p++;
+ while (--p > buf) {
+ char ch = *p;
+ if (ch == '0') {
+ *p = '\0'; /* zap trailing zeros */
+ continue;
+ }
+ if (ch == '.')
+ *p = '\0'; /* zap trailing dot */
+ break;
+ }
+}
+
+static void svg_write_number(FILE *fp, double d)
+{
+ char buf[60];
+ svg_format_number(buf, sizeof(buf), d);
+ fputs(buf, fp);
+}
+
+static int svg_color_is_black(int c)
+{
+ /* gfx_color_t is RRGGBBAA */
+ return c == 0x000000FF;
+}
+
+static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
+{
+ /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
+ gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
+ gfx_color_t opacity = c & 0xFF;
+ fprintf(fp, " %s=\"", attr);
+ if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
+ /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
+ fprintf(fp, "#%03lX",
+ ( ((rrggbb >> 8) & 0xF00)
+ | ((rrggbb >> 4) & 0x0F0)
+ | ( rrggbb & 0x00F)));
+ } else {
+ fprintf(fp, "#%06lX", rrggbb);
+ }
+ fputs("\"", fp);
+ if (opacity != 0xFF) {
+ fprintf(fp, " opacity=\"");
+ svg_write_number(fp, opacity / 255.0);
+ fputs("\"", fp);
+ }
+}
+
+static void svg_get_dash(gfx_node_t *node, svg_dash *d)
+{
+ double offset;
+ int mult;
+ if (node->dash_on <= 0 || node->dash_off <= 0) {
+ d->dash_enable = 0;
+ return;
+ }
+ 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 1.2.6 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);
+ 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 1.2.6 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 *p;
+ const char *ps_font = afm_get_font_postscript_name(node->filename);
+ int lineLen = 0;
+ pdf_coords g;
+ 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;
+ p = node->text;
+ while (1) {
+ unsigned char ch = *(unsigned char*)p;
+ if (!ch)
+ break;
+ 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 >= 126 || ch < 32) {
+ fprintf(fp, "\\%03o", ch);
+ lineLen += 3;
+ } else {
+ fputc(ch, fp);
+ }
+ }
+ p++;
+ }
+ 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;
+ 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_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(pdf_buffer *buf, const char *text)
+{
+ const char *p = text;
+ while (1) {
+ unsigned char ch = *(unsigned char*)p;
+ switch (ch) {
+ case 0: return;
+ case '(':
+ case ')':
+ case '\\':
+ pdf_puts(buf, "\\");
+ pdf_put(buf, p, 1);
+ 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 >= 126 || ch < 32) {
+ char tmp[10];
+ snprintf(tmp, sizeof(tmp), "\\%03o", ch);
+ pdf_puts(buf, tmp);
+ } else {
+ pdf_put(buf, p, 1);
+ }
+ }
+ p++;
+ }
+}
+
+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 1.2.6 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;
+}
+