X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Frrd_gfx.c;h=bc57a9039a8379a05a8c10bc2a9996bec5f806c0;hb=6be9ae2ce97d602811d4ccc07a2f0b42142ff5b0;hp=715d8d2c30dc275ed45db9711d76d4ad72165859;hpb=a1fe8fd19bb4f558150e52c0624869667b739877;p=rrdtool.git diff --git a/src/rrd_gfx.c b/src/rrd_gfx.c index 715d8d2..bc57a90 100644 --- a/src/rrd_gfx.c +++ b/src/rrd_gfx.c @@ -11,12 +11,13 @@ #else # define DPRINT(x) #endif - +#include "rrd_tool.h" #include #include #include FT_FREETYPE_H #include "rrd_gfx.h" +#include "rrd_afm.h" /* lines are better drawn on the pixle than between pixles */ #define LINEOFFSET 0.5 @@ -31,11 +32,13 @@ gfx_node_t *gfx_new_node( gfx_canvas_t *canvas,enum gfx_en type){ node->path = NULL; /* path */ node->points = 0; node->points_max =0; + node->closed_path = 0; node->svp = NULL; /* svp */ node->filename = NULL; /* font or image filename */ node->text = NULL; node->x = 0.0; node->y = 0.0; /* position */ + node->angle = 0; node->halign = GFX_H_NULL; /* text alignement */ node->valign = GFX_V_NULL; /* text alignement */ node->tabwidth = 0.0; @@ -54,14 +57,25 @@ gfx_canvas_t *gfx_new_canvas (void) { gfx_canvas_t *canvas = art_new(gfx_canvas_t,1); canvas->firstnode = NULL; canvas->lastnode = NULL; + canvas->imgformat = IF_PNG; /* we default to PNG output */ + canvas->interlaced = 0; + canvas->zoom = 1.0; return canvas; } /* create a new line */ gfx_node_t *gfx_new_line(gfx_canvas_t *canvas, - double x0, double y0, - double x1, double y1, + double X0, double Y0, + double X1, double Y1, double width, gfx_color_t color){ + return gfx_new_dashed_line(canvas, X0, Y0, X1, Y1, width, color, 0, 0); +} + +gfx_node_t *gfx_new_dashed_line(gfx_canvas_t *canvas, + double X0, double Y0, + double X1, double Y1, + double width, gfx_color_t color, + double dash_on, double dash_off){ gfx_node_t *node; ArtVpath *vec; @@ -69,23 +83,25 @@ gfx_node_t *gfx_new_line(gfx_canvas_t *canvas, if (node == NULL) return NULL; vec = art_new(ArtVpath, 3); if (vec == NULL) return NULL; - vec[0].code = ART_MOVETO_OPEN; vec[0].x=x0+LINEOFFSET; vec[0].y=y0+LINEOFFSET; - vec[1].code = ART_LINETO; vec[1].x=x1+LINEOFFSET; vec[1].y=y1+LINEOFFSET; + vec[0].code = ART_MOVETO_OPEN; vec[0].x=X0+LINEOFFSET; vec[0].y=Y0+LINEOFFSET; + vec[1].code = ART_LINETO; vec[1].x=X1+LINEOFFSET; vec[1].y=Y1+LINEOFFSET; vec[2].code = ART_END; node->points = 3; node->points_max = 3; node->color = color; node->size = width; + node->dash_on = dash_on; + node->dash_off = dash_off; node->path = vec; return node; } /* create a new area */ gfx_node_t *gfx_new_area (gfx_canvas_t *canvas, - double x0, double y0, - double x1, double y1, - double x2, double y2, + double X0, double Y0, + double X1, double Y1, + double X2, double Y2, gfx_color_t color) { gfx_node_t *node; @@ -94,10 +110,10 @@ gfx_node_t *gfx_new_area (gfx_canvas_t *canvas, if (node == NULL) return NULL; vec = art_new(ArtVpath, 5); if (vec == NULL) return NULL; - vec[0].code = ART_MOVETO; vec[0].x=x0; vec[0].y=y0; - vec[1].code = ART_LINETO; vec[1].x=x1; vec[1].y=y1; - vec[2].code = ART_LINETO; vec[2].x=x2; vec[2].y=y2; - vec[3].code = ART_LINETO; vec[3].x=x0; vec[3].y=y0; + vec[0].code = ART_MOVETO; vec[0].x=X0; vec[0].y=Y0; + vec[1].code = ART_LINETO; vec[1].x=X1; vec[1].y=Y1; + vec[2].code = ART_LINETO; vec[2].x=X2; vec[2].y=Y2; + vec[3].code = ART_LINETO; vec[3].x=X0; vec[3].y=Y0; vec[4].code = ART_END; node->points = 5; @@ -113,8 +129,8 @@ int gfx_add_point (gfx_node_t *node, double x, double y){ if (node == NULL) return 1; if (node->type == GFX_AREA) { - double x0 = node->path[0].x; - double y0 = node->path[0].y; + double X0 = node->path[0].x; + double Y0 = node->path[0].y; node->points -= 2; art_vpath_add_point (&(node->path), &(node->points), @@ -125,7 +141,7 @@ int gfx_add_point (gfx_node_t *node, &(node->points), &(node->points_max), ART_LINETO, - x0,y0); + X0,Y0); art_vpath_add_point (&(node->path), &(node->points), &(node->points_max), @@ -151,7 +167,11 @@ int gfx_add_point (gfx_node_t *node, return 0; } - +void gfx_close_path (gfx_node_t *node) { + node->closed_path = 1; + if (node->path[0].code == ART_MOVETO_OPEN) + node->path[0].code = ART_MOVETO; +} /* create a text node */ gfx_node_t *gfx_new_text (gfx_canvas_t *canvas, @@ -172,14 +192,66 @@ gfx_node_t *gfx_new_text (gfx_canvas_t *canvas, node->filename = strdup(font); node->x = x; node->y = y; + node->angle = angle; node->color = color; node->tabwidth = tabwidth; node->halign = h_align; node->valign = v_align; +#if 0 + /* debugging: show text anchor + green is along x-axis, red is downward y-axis */ + if (1) { + double a = 2 * M_PI * -node->angle / 360.0; + double cos_a = cos(a); + double sin_a = sin(a); + double len = 3; + gfx_new_line(canvas, + x, y, + x + len * cos_a, y - len * sin_a, + 0.2, 0x00FF0000); + gfx_new_line(canvas, + x, y, + x + len * sin_a, y + len * cos_a, + 0.2, 0xFF000000); + } +#endif return node; } -double gfx_get_text_width ( double start, char* font, double size, +int gfx_render(gfx_canvas_t *canvas, + art_u32 width, art_u32 height, + gfx_color_t background, FILE *fp){ + switch (canvas->imgformat) { + case IF_PNG: + return gfx_render_png (canvas, width, height, background, fp); + case IF_SVG: + return gfx_render_svg (canvas, width, height, background, fp); + case IF_EPS: + return gfx_render_eps (canvas, width, height, background, fp); + case IF_PDF: + return gfx_render_pdf (canvas, width, height, background, fp); + default: + return -1; + } +} + +double gfx_get_text_width ( gfx_canvas_t *canvas, + double start, char* font, double size, + double tabwidth, char* text){ + switch (canvas->imgformat) { + case IF_PNG: + return gfx_get_text_width_libart (canvas, start, font, size, tabwidth, text); + case IF_SVG: /* fall through */ + case IF_EPS: + case IF_PDF: + return afm_get_text_width(start, font, size, tabwidth, text); + default: + return size * strlen(text); + } +} + +double gfx_get_text_width_libart ( gfx_canvas_t *canvas, + double start, char* font, double size, double tabwidth, char* text){ FT_GlyphSlot slot; @@ -210,6 +282,10 @@ double gfx_get_text_width ( double start, char* font, double size, } error = FT_Load_Glyph( face, glyph_index, 0 ); + if ( error ) { + FT_Done_FreeType(library); + return -1; + } if (! previous) { text_width -= (double)slot->metrics.horiBearingX / 64.0; /* add just char width */ } @@ -218,18 +294,38 @@ double gfx_get_text_width ( double start, char* font, double size, text_width -= (double)slot->metrics.horiAdvance / 64.0; /* remove last step */ text_width += (double)slot->metrics.width / 64.0; /* add just char width */ text_width += (double)slot->metrics.horiBearingX / 64.0; /* add just char width */ + FT_Done_FreeType(library); return text_width; } +static void gfx_libart_close_path(gfx_canvas_t *canvas, + gfx_node_t *node, ArtVpath **vec) +{ + /* libart must have end==start for closed paths, + even if using ART_MOVETO and not ART_MOVETO_OPEN + so add extra point which is the same as the starting point */ + int points_max = node->points; /* scaled array has exact size */ + int points = node->points - 1; + art_vpath_add_point (vec, &points, &points_max, ART_LINETO, + (**vec).x, (**vec).y); + art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0); +} - +static void gfx_round_scaled_coordinates(gfx_canvas_t *canvas, + gfx_node_t *node, ArtVpath *vec) +{ + while (vec->code != ART_END) { + vec->x = floor(vec->x - LINEOFFSET + 0.5) + LINEOFFSET; + vec->y = floor(vec->y - LINEOFFSET + 0.5) + LINEOFFSET; + vec++; + } +} static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel); /* render grafics into png image */ int gfx_render_png (gfx_canvas_t *canvas, art_u32 width, art_u32 height, - double zoom, gfx_color_t background, FILE *fp){ @@ -237,8 +333,8 @@ int gfx_render_png (gfx_canvas_t *canvas, gfx_node_t *node = canvas->firstnode; art_u8 red = background >> 24, green = (background >> 16) & 0xff; art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff ); - unsigned long pys_width = width * zoom; - unsigned long pys_height = height * zoom; + unsigned long pys_width = width * canvas->zoom; + unsigned long pys_height = height * canvas->zoom; const int bytes_per_pixel = 3; unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */ art_u8 *buffer = art_new (art_u8, rowstride*pys_height); @@ -251,12 +347,15 @@ int gfx_render_png (gfx_canvas_t *canvas, ArtVpath *vec; double dst[6]; ArtSVP *svp; - art_affine_scale(dst,zoom,zoom); + art_affine_scale(dst,canvas->zoom,canvas->zoom); vec = art_vpath_affine_transform(node->path,dst); + if (node->closed_path) + gfx_libart_close_path(canvas, node, &vec); + gfx_round_scaled_coordinates(canvas, node, vec); if(node->type == GFX_LINE){ svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND, ART_PATH_STROKE_CAP_ROUND, - node->size*zoom,1,1); + node->size*canvas->zoom,1,1); } else { svp = art_svp_from_vpath ( vec ); } @@ -289,16 +388,17 @@ int gfx_render_png (gfx_canvas_t *canvas, (char *)node->filename, 0, &face ); + if ( error ) break; use_kerning = FT_HAS_KERNING(face); - if ( error ) break; error = FT_Set_Char_Size(face, /* handle to face object */ (long)(node->size*64), (long)(node->size*64), - (long)(100*zoom), - (long)(100*zoom)); - pen_x = node->x * zoom; - pen_y = node->y * zoom; + (long)(100*canvas->zoom), + (long)(100*canvas->zoom)); + if ( error ) break; + pen_x = node->x * canvas->zoom; + pen_y = node->y * canvas->zoom; slot = face->glyph; for(text=(unsigned char *)node->text;*text;text++) { @@ -313,6 +413,7 @@ int gfx_render_png (gfx_canvas_t *canvas, } error = FT_Load_Glyph( face, glyph_index, 0 ); + if ( error ) break; if (previous == 0){ pen_x -= (double)slot->metrics.horiBearingX / 64.0; /* adjust pos for first char */ text_width -= (double)slot->metrics.horiBearingX / 64.0; /* add just char width */ @@ -330,12 +431,14 @@ int gfx_render_png (gfx_canvas_t *canvas, case GFX_H_RIGHT: pen_x -= text_width; break; case GFX_H_CENTER: pen_x -= text_width / 2.0; break; case GFX_H_LEFT: break; + case GFX_H_NULL: break; } switch(node->valign){ case GFX_V_TOP: pen_y += text_height; break; case GFX_V_CENTER: pen_y += text_height / 2.0; break; case GFX_V_BOTTOM: break; + case GFX_V_NULL: break; } glyph_index=0; @@ -352,6 +455,7 @@ int gfx_render_png (gfx_canvas_t *canvas, } error = FT_Load_Glyph( face, glyph_index, FT_LOAD_RENDER ); + if ( error ) break; gr = slot->bitmap.num_grays -1; for (iy=0; iy < slot->bitmap.rows; iy++){ long buf_y = iy+(pen_y+0.5)-slot->bitmap_top; @@ -380,6 +484,7 @@ int gfx_render_png (gfx_canvas_t *canvas, } gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel); art_free(buffer); + FT_Done_FreeType( library ); return 0; } @@ -457,3 +562,1423 @@ static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, lon png_destroy_write_struct(&png_ptr, &info_ptr); return 1; } + + +/* ------- 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 = "Helvetica"; +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("': 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, " stroke-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 tags take less space than + 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) +{ + double x = node->x - LINEOFFSET; + double y = node->y - LINEOFFSET; + if (node->angle != 0) { + svg_start_tag(fp, "g"); + fputs(" transform=\"translate(", fp); + svg_write_number(fp, x); + fputs(",", fp); + svg_write_number(fp, y); + fputs(") rotate(", fp); + svg_write_number(fp, node->angle); + fputs(")\"", fp); + x = y = 0; + svg_close_tag(fp); + } + switch (node->valign) { + case GFX_V_TOP: y += node->size; break; + case GFX_V_CENTER: y += node->size / 3; break; + case GFX_V_BOTTOM: break; + case GFX_V_NULL: break; + } + svg_start_tag(fp, "text"); + fputs(" x=\"", fp); + svg_write_number(fp, x); + fputs("\" y=\"", fp); + svg_write_number(fp, y); + if (strcmp(node->filename, svg_default_font)) + fprintf(fp, " font-family=\"%s\"", node->filename); + 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"); + switch (node->halign) { + case GFX_H_RIGHT: fputs(" text-anchor=\"end\"", fp); break; + case GFX_H_CENTER: fputs(" text-anchor=\"middle\"", fp); break; + case GFX_H_LEFT: break; + case GFX_H_NULL: break; + } + 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; + fputs( +"\n" +"\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); + 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) +{ + /* gfx_color_t is RRGGBBAA */ + if (state->color == color) + return; + fprintf(state->fp, "%d %d %d Rgb\n", + (int)((color >> 24) & 255), + (int)((color >> 16) & 255), + (int)((color >> 8) & 255)); + 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 1.1.x, 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" + "/TaL { } bd\n" + "/TaC {dup stringwidth pop neg 2 div 0 rmoveto } bd\n" + "/TaR {dup stringwidth pop neg 0 rmoveto } bd\n" + "/TL {moveto TaL show} bd\n" + "/TC {moveto TaC show} bd\n" + "/TR {moveto TaR 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 unsigned char *p; + const char *ps_font = afm_get_font_postscript_name(node->filename); + char align = 'L'; + double x = node->x; + double y = state->page_height - node->y, ydelta = 0; + int lineLen = 0; + 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); + } + fputs("(", fp); + lineLen = 20; + for (p = (const unsigned char*)node->text; *p; p++) { + if (lineLen > 70) { + fputs("\\\n", fp); /* backslash and \n */ + lineLen = 0; + } + switch (*p) { + case '(': + case ')': + case '\\': + case '\n': + case '\r': + case '\t': + fputc('\\', fp); + lineLen++; + /* fall-through */ + default: + if (*p >= 126) + fprintf(fp, "\\%03o", *p); + else + fputc(*p, fp); + lineLen++; + } + } + fputs(") ", fp); + switch(node->valign){ + case GFX_V_TOP: ydelta = -node->size; break; + case GFX_V_CENTER: ydelta = -node->size / 3.0; break; + case GFX_V_BOTTOM: break; + case GFX_V_NULL: break; + } + if (node->angle == 0) + y += ydelta; + switch (node->halign) { + case GFX_H_RIGHT: align = 'R'; break; + case GFX_H_CENTER: align = 'C'; break; + case GFX_H_LEFT: align= 'L'; break; + case GFX_H_NULL: align= 'L'; break; + } + if (node->angle != 0) { + fputs("\n", fp); + fputs(" gsave ", fp); + svg_write_number(fp, x); + fputc(' ', fp); + svg_write_number(fp, y); + fputs(" translate ", fp); + svg_write_number(fp, -node->angle); + fputs(" rotate 0 ", fp); + svg_write_number(fp, ydelta); + fputs(" moveto ", fp); + fprintf(fp, "Ta%c", align); + fputs(" show grestore\n", fp); + } else { + svg_write_number(fp, x); + fputc(' ', fp); + svg_write_number(fp, y); + fputs(" T", fp); + fputc(align, fp); + fputc('\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/asn/developer/technotes/acrobatpdf.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 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_init_object(pdf_state *state, pdf_buffer *buf) +{ + pdf_init_buffer(state, buf); + buf->id = ++state->last_obj_id; + buf->is_obj = 1; +} + +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) +{ + /* gfx_color_t is RRGGBBAA */ + if (*current_color == color) + return; + pdf_putnumber(buf, ((color >> 24) & 255) / 255.0); + pdf_puts(buf, " "); + pdf_putnumber(buf, ((color >> 16) & 255) / 255.0); + pdf_puts(buf, " "); + pdf_putnumber(buf, ((color >> 8) & 255) / 255.0); + 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_text(pdf_state *state, gfx_node_t *node, + int last_was_text, int next_is_text) +{ + char tmp[30]; + pdf_buffer *s = &state->graph_stream; + const unsigned char *p; + pdf_font *font = pdf_find_font(state, node); + double x = node->x; + double y = state->page_height - node->y; + double dx = 0, dy = 0; + double cos_a = 0, sin_a = 0; + if (font == NULL) { + rrd_set_error("font disappeared"); + state->has_failed = 1; + return; + } + switch(node->valign){ + case GFX_V_TOP: dy = -node->size; break; + case GFX_V_CENTER: dy = -node->size / 3.0; break; + case GFX_V_BOTTOM: break; + case GFX_V_NULL: break; + } + switch (node->halign) { + case GFX_H_RIGHT: dx = -afm_get_text_width(0, font->ps_font, + node->size, node->tabwidth, node->text); + break; + case GFX_H_CENTER: dx = -afm_get_text_width(0, font->ps_font, + node->size, node->tabwidth, node->text) / 2; + break; + case GFX_H_LEFT: break; + case GFX_H_NULL: break; + } + pdf_set_fill_color(s, node->color); + if (node->angle != 0) { + double a = 2 * M_PI * -node->angle / 360.0; + double new_x, new_y; + cos_a = cos(a); + sin_a = sin(a); + new_x = cos_a * dx - sin_a * dy + x; + new_y = sin_a * dx + cos_a * dy + y; + x = new_x; + y = new_y; + } else { + x += dx; + y += dy; + } + if (!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"); + } + if (node->angle == 0) { + pdf_puts(s, "1 0 0 1 "); + } else { + pdf_putnumber(s, cos_a); + pdf_puts(s, " "); + pdf_putnumber(s, sin_a); + pdf_puts(s, " "); + pdf_putnumber(s, -sin_a); + pdf_puts(s, " "); + pdf_putnumber(s, cos_a); + pdf_puts(s, " "); + } + pdf_putnumber(s, x); + pdf_puts(s, " "); + pdf_putnumber(s, y); + pdf_puts(s, " Tm\n"); + pdf_puts(s, "("); + for (p = (const unsigned char*)node->text; *p; p++) { + switch (*p) { + case '(': + case ')': + case '\\': + case '\n': + case '\r': + case '\t': + pdf_puts(s, "\\"); + /* fall-through */ + default: + if (*p >= 126) { + snprintf(tmp, sizeof(tmp), "\\%03o", *p); + pdf_puts(s, tmp); + } else { + pdf_put(s, (const char*)p, 1); + } + } + } + pdf_puts(s, ") Tj\n"); + if (!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->pages_obj); + pdf_init_dict(state, &state->page1_obj); + pdf_init_dict(state, &state->fontsdict_obj); + state->graph_stream.is_stream = 1; + pdf_create_fonts(state); + if (state->has_failed) + return; + /* make stream last object in file */ + pdf_init_object(state, &state->graph_stream); +} + +static void pdf_setup_document(pdf_state *state) +{ + /* 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"); + /* 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, ">>\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 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; +} +