c06e061c8227c120bd2417cb2dc0881bf273f549
1 /****************************************************************************
2 * RRDtool 1.1.x Copyright Tobias Oetiker, 1997 - 2003
3 ****************************************************************************
4 * rrd_gfx.c graphics wrapper for rrdtool
5 **************************************************************************/
7 /* #define DEBUG */
9 #ifdef DEBUG
10 # define DPRINT(x) (void)(printf x, printf("\n"))
11 #else
12 # define DPRINT(x)
13 #endif
14 #include "rrd_tool.h"
15 #include <png.h>
16 #include <ft2build.h>
17 #include FT_FREETYPE_H
18 #include FT_GLYPH_H
20 #include "rrd_gfx.h"
21 #include "rrd_afm.h"
23 /* lines are better drawn on the pixle than between pixles */
24 #define LINEOFFSET 0.5
26 typedef struct gfx_char_s *gfx_char;
27 struct gfx_char_s {
28 FT_UInt index; /* glyph index */
29 FT_Vector pos; /* location from baseline in 26.6 */
30 FT_Glyph image; /* glyph bitmap */
31 };
33 typedef struct gfx_string_s *gfx_string;
34 struct gfx_string_s {
35 unsigned int width;
36 unsigned int height;
37 size_t count; /* number of characters */
38 gfx_char glyphs;
39 size_t num_glyphs;
40 FT_BBox bbox;
41 FT_Matrix transform;
42 };
44 /* compute string bbox */
45 static void compute_string_bbox(gfx_string string);
47 /* create a freetype glyph string */
48 gfx_string gfx_string_create ( FT_Face face,
49 const char *text, int rotation);
51 /* create a freetype glyph string */
52 static void gfx_string_destroy ( gfx_string string );
54 static
55 gfx_node_t *gfx_new_node( gfx_canvas_t *canvas,enum gfx_en type){
56 gfx_node_t *node = art_new(gfx_node_t,1);
57 if (node == NULL) return NULL;
58 node->type = type;
59 node->color = 0x0; /* color of element 0xRRGGBBAA alpha 0xff is solid*/
60 node->size =0.0; /* font size, line width */
61 node->path = NULL; /* path */
62 node->points = 0;
63 node->points_max =0;
64 node->closed_path = 0;
65 node->svp = NULL; /* svp */
66 node->filename = NULL; /* font or image filename */
67 node->text = NULL;
68 node->x = 0.0;
69 node->y = 0.0; /* position */
70 node->angle = 0;
71 node->halign = GFX_H_NULL; /* text alignement */
72 node->valign = GFX_V_NULL; /* text alignement */
73 node->tabwidth = 0.0;
74 node->next = NULL;
75 if (canvas->lastnode != NULL){
76 canvas->lastnode->next = node;
77 }
78 if (canvas->firstnode == NULL){
79 canvas->firstnode = node;
80 }
81 canvas->lastnode = node;
82 return node;
83 }
85 gfx_canvas_t *gfx_new_canvas (void) {
86 gfx_canvas_t *canvas = art_new(gfx_canvas_t,1);
87 canvas->firstnode = NULL;
88 canvas->lastnode = NULL;
89 canvas->imgformat = IF_PNG; /* we default to PNG output */
90 canvas->interlaced = 0;
91 canvas->zoom = 1.0;
92 return canvas;
93 }
95 /* create a new line */
96 gfx_node_t *gfx_new_line(gfx_canvas_t *canvas,
97 double X0, double Y0,
98 double X1, double Y1,
99 double width, gfx_color_t color){
100 return gfx_new_dashed_line(canvas, X0, Y0, X1, Y1, width, color, 0, 0);
101 }
103 gfx_node_t *gfx_new_dashed_line(gfx_canvas_t *canvas,
104 double X0, double Y0,
105 double X1, double Y1,
106 double width, gfx_color_t color,
107 double dash_on, double dash_off){
109 gfx_node_t *node;
110 ArtVpath *vec;
111 node = gfx_new_node(canvas,GFX_LINE);
112 if (node == NULL) return NULL;
113 vec = art_new(ArtVpath, 3);
114 if (vec == NULL) return NULL;
115 vec[0].code = ART_MOVETO_OPEN; vec[0].x=X0+LINEOFFSET; vec[0].y=Y0+LINEOFFSET;
116 vec[1].code = ART_LINETO; vec[1].x=X1+LINEOFFSET; vec[1].y=Y1+LINEOFFSET;
117 vec[2].code = ART_END;
119 node->points = 3;
120 node->points_max = 3;
121 node->color = color;
122 node->size = width;
123 node->dash_on = dash_on;
124 node->dash_off = dash_off;
125 node->path = vec;
126 return node;
127 }
129 /* create a new area */
130 gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,
131 double X0, double Y0,
132 double X1, double Y1,
133 double X2, double Y2,
134 gfx_color_t color) {
136 gfx_node_t *node;
137 ArtVpath *vec;
138 node = gfx_new_node(canvas,GFX_AREA);
139 if (node == NULL) return NULL;
140 vec = art_new(ArtVpath, 5);
141 if (vec == NULL) return NULL;
142 vec[0].code = ART_MOVETO; vec[0].x=X0; vec[0].y=Y0;
143 vec[1].code = ART_LINETO; vec[1].x=X1; vec[1].y=Y1;
144 vec[2].code = ART_LINETO; vec[2].x=X2; vec[2].y=Y2;
145 vec[3].code = ART_LINETO; vec[3].x=X0; vec[3].y=Y0;
146 vec[4].code = ART_END;
148 node->points = 5;
149 node->points_max = 5;
150 node->color = color;
151 node->path = vec;
153 return node;
154 }
156 /* add a point to a line or to an area */
157 int gfx_add_point (gfx_node_t *node,
158 double x, double y){
159 if (node == NULL) return 1;
160 if (node->type == GFX_AREA) {
161 double X0 = node->path[0].x;
162 double Y0 = node->path[0].y;
163 node->points -= 2;
164 art_vpath_add_point (&(node->path),
165 &(node->points),
166 &(node->points_max),
167 ART_LINETO,
168 x,y);
169 art_vpath_add_point (&(node->path),
170 &(node->points),
171 &(node->points_max),
172 ART_LINETO,
173 X0,Y0);
174 art_vpath_add_point (&(node->path),
175 &(node->points),
176 &(node->points_max),
177 ART_END,
178 0,0);
179 } else if (node->type == GFX_LINE) {
180 node->points -= 1;
181 art_vpath_add_point (&(node->path),
182 &(node->points),
183 &(node->points_max),
184 ART_LINETO,
185 x+LINEOFFSET,y+LINEOFFSET);
186 art_vpath_add_point (&(node->path),
187 &(node->points),
188 &(node->points_max),
189 ART_END,
190 0,0);
192 } else {
193 /* can only add point to areas and lines */
194 return 1;
195 }
196 return 0;
197 }
199 void gfx_close_path (gfx_node_t *node) {
200 node->closed_path = 1;
201 if (node->path[0].code == ART_MOVETO_OPEN)
202 node->path[0].code = ART_MOVETO;
203 }
205 /* create a text node */
206 gfx_node_t *gfx_new_text (gfx_canvas_t *canvas,
207 double x, double y, gfx_color_t color,
208 char* font, double size,
209 double tabwidth, double angle,
210 enum gfx_h_align_en h_align,
211 enum gfx_v_align_en v_align,
212 char* text){
213 gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT);
214 /* if (angle != 0.0){*/
215 /* currently we only support 0 and 270 */
216 /* angle = 270.0;
217 }*/
219 node->text = strdup(text);
220 node->size = size;
221 node->filename = strdup(font);
222 node->x = x;
223 node->y = y;
224 node->angle = angle;
225 node->color = color;
226 node->tabwidth = tabwidth;
227 node->halign = h_align;
228 node->valign = v_align;
229 #if 0
230 /* debugging: show text anchor
231 green is along x-axis, red is downward y-axis */
232 if (1) {
233 double a = 2 * M_PI * -node->angle / 360.0;
234 double cos_a = cos(a);
235 double sin_a = sin(a);
236 double len = 3;
237 gfx_new_line(canvas,
238 x, y,
239 x + len * cos_a, y - len * sin_a,
240 0.2, 0x00FF0000);
241 gfx_new_line(canvas,
242 x, y,
243 x + len * sin_a, y + len * cos_a,
244 0.2, 0xFF000000);
245 }
246 #endif
247 return node;
248 }
250 int gfx_render(gfx_canvas_t *canvas,
251 art_u32 width, art_u32 height,
252 gfx_color_t background, FILE *fp){
253 switch (canvas->imgformat) {
254 case IF_PNG:
255 return gfx_render_png (canvas, width, height, background, fp);
256 case IF_SVG:
257 return gfx_render_svg (canvas, width, height, background, fp);
258 case IF_EPS:
259 return gfx_render_eps (canvas, width, height, background, fp);
260 case IF_PDF:
261 return gfx_render_pdf (canvas, width, height, background, fp);
262 default:
263 return -1;
264 }
265 }
267 static void gfx_string_destroy ( gfx_string string ) {
268 unsigned int n;
269 if (string->glyphs) {
270 for (n=0; n<string->num_glyphs; ++n)
271 FT_Done_Glyph (string->glyphs[n].image);
272 free (string->glyphs);
273 }
274 free (string);
275 }
278 double gfx_get_text_width ( gfx_canvas_t *canvas,
279 double start, char* font, double size,
280 double tabwidth, char* text, int rotation){
281 switch (canvas->imgformat) {
282 case IF_PNG:
283 return gfx_get_text_width_libart (canvas, start, font, size, tabwidth, text, rotation);
284 case IF_SVG: /* fall through */
285 case IF_EPS:
286 case IF_PDF:
287 return afm_get_text_width(start, font, size, tabwidth, text);
288 default:
289 return size * strlen(text);
290 }
291 }
293 double gfx_get_text_width_libart ( gfx_canvas_t *canvas,
294 double start, char* font, double size,
295 double tabwidth, char* text, int rotation){
297 int error;
298 double text_width=0;
299 FT_Face face;
300 FT_Library library=NULL;
301 gfx_string string;
303 FT_Init_FreeType( &library );
304 error = FT_New_Face( library, font, 0, &face );
305 if ( error ) return -1;
306 error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
307 if ( error ) return -1;
309 string = gfx_string_create( face, text, rotation);
310 text_width = string->width;
311 gfx_string_destroy(string);
312 FT_Done_FreeType(library);
313 return text_width/64;
314 }
316 static void gfx_libart_close_path(gfx_canvas_t *canvas,
317 gfx_node_t *node, ArtVpath **vec)
318 {
319 /* libart must have end==start for closed paths,
320 even if using ART_MOVETO and not ART_MOVETO_OPEN
321 so add extra point which is the same as the starting point */
322 int points_max = node->points; /* scaled array has exact size */
323 int points = node->points - 1;
324 art_vpath_add_point (vec, &points, &points_max, ART_LINETO,
325 (**vec).x, (**vec).y);
326 art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
327 }
329 static void gfx_round_scaled_coordinates(gfx_canvas_t *canvas,
330 gfx_node_t *node, ArtVpath *vec)
331 {
332 while (vec->code != ART_END) {
333 vec->x = floor(vec->x - LINEOFFSET + 0.5) + LINEOFFSET;
334 vec->y = floor(vec->y - LINEOFFSET + 0.5) + LINEOFFSET;
335 vec++;
336 }
337 }
339 /* find bbox of a string */
340 static void compute_string_bbox(gfx_string string) {
341 unsigned int n;
342 FT_BBox bbox;
344 bbox.xMin = bbox.yMin = 32000;
345 bbox.xMax = bbox.yMax = -32000;
346 for ( n = 0; n < string->num_glyphs; n++ ) {
347 FT_BBox glyph_bbox;
348 FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
349 &glyph_bbox );
350 if (glyph_bbox.xMin < bbox.xMin) {
351 bbox.xMin = glyph_bbox.xMin;
352 }
353 if (glyph_bbox.yMin < bbox.yMin) {
354 bbox.yMin = glyph_bbox.yMin;
355 }
356 if (glyph_bbox.xMax > bbox.xMax) {
357 bbox.xMax = glyph_bbox.xMax;
358 }
359 if (glyph_bbox.yMax > bbox.yMax) {
360 bbox.yMax = glyph_bbox.yMax;
361 }
362 }
363 if ( bbox.xMin > bbox.xMax ) {
364 bbox.xMin = 0;
365 bbox.yMin = 0;
366 bbox.xMax = 0;
367 bbox.yMax = 0;
368 }
369 string->bbox.xMin = bbox.xMin;
370 string->bbox.xMax = bbox.xMax;
371 string->bbox.yMin = bbox.yMin;
372 string->bbox.yMax = bbox.yMax;
373 }
375 /* create a free type glyph string */
376 gfx_string gfx_string_create(FT_Face face,const char *text,
377 int rotation)
378 {
380 FT_GlyphSlot slot = face->glyph; /* a small shortcut */
381 FT_Bool use_kerning;
382 FT_UInt previous;
383 FT_Vector ft_pen;
385 gfx_string string;
386 gfx_char glyph; /* current glyph in table */
387 unsigned int n;
388 int error;
390 ft_pen.x = 0; /* start at (0,0) !! */
391 ft_pen.y = 0;
393 string = (gfx_string) malloc (sizeof(struct gfx_string_s));
394 string->width = 0;
395 string->height = 0;
396 string->count = strlen (text);
397 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
398 string->num_glyphs = 0;
399 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
400 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
401 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
402 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
404 use_kerning = FT_HAS_KERNING(face);
405 previous = 0;
406 glyph = string->glyphs;
407 for (n=0; n<string->count; n++, glyph++) {
408 FT_Vector vec;
410 /* initialize each struct gfx_char_s */
411 glyph->index = 0;
412 glyph->pos.x = 0;
413 glyph->pos.y = 0;
414 glyph->image = NULL;
416 glyph->index = FT_Get_Char_Index( face, text[n] );
418 /* compute glyph origin */
419 if ( use_kerning && previous && glyph->index ) {
420 FT_Vector kerning;
421 FT_Get_Kerning (face, previous, glyph->index,
422 ft_kerning_default, &kerning);
423 ft_pen.x += kerning.x;
424 ft_pen.y += kerning.y;
425 }
427 /* store current pen position */
428 glyph->pos.x = ft_pen.x;
429 glyph->pos.y = ft_pen.y;
431 /* load the glyph image (in its native format) */
432 /* for now, we take a monochrome glyph bitmap */
433 error = FT_Load_Glyph (face, glyph->index, FT_LOAD_DEFAULT);
434 if (error) {
435 fprintf (stderr, "couldn't load glyph: %c\n", text[n]);
436 continue;
437 }
438 error = FT_Get_Glyph (slot, &glyph->image);
439 if (error) {
440 fprintf (stderr, "couldn't get glyph from slot: %c\n", text[n]);
441 continue;
442 }
444 ft_pen.x += slot->advance.x;
445 ft_pen.y += slot->advance.y;
447 /* rotate glyph */
448 vec = glyph->pos;
449 FT_Vector_Transform (&vec, &string->transform);
450 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
451 if (error) {
452 fprintf (stderr, "couldn't transform glyph\n");
453 continue;
454 }
456 /* convert to a bitmap - destroy native image */
457 error = FT_Glyph_To_Bitmap (&glyph->image, ft_render_mode_normal, 0, 1);
458 if (error) {
459 fprintf (stderr, "couldn't convert glyph to bitmap\n");
460 continue;
461 }
463 /* increment number of glyphs */
464 previous = glyph->index;
465 string->num_glyphs++;
466 }
467 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
468 compute_string_bbox( string );
469 string->width = string->bbox.xMax - string->bbox.xMin;
470 string->height = string->bbox.yMax - string->bbox.yMin;
472 return string;
473 }
476 static int gfx_save_png (art_u8 *buffer, FILE *fp,
477 long width, long height, long bytes_per_pixel);
478 /* render grafics into png image */
480 int gfx_render_png (gfx_canvas_t *canvas,
481 art_u32 width, art_u32 height,
482 gfx_color_t background, FILE *fp){
485 FT_Library library;
486 gfx_node_t *node = canvas->firstnode;
487 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
488 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
489 unsigned long pys_width = width * canvas->zoom;
490 unsigned long pys_height = height * canvas->zoom;
491 const int bytes_per_pixel = 3;
492 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
493 art_u8 *buffer = art_new (art_u8, rowstride*pys_height);
494 art_rgb_run_alpha (buffer, red, green, blue, alpha, pys_width*pys_height);
495 FT_Init_FreeType( &library );
496 while(node){
497 switch (node->type) {
498 case GFX_LINE:
499 case GFX_AREA: {
500 ArtVpath *vec;
501 double dst[6];
502 ArtSVP *svp;
503 art_affine_scale(dst,canvas->zoom,canvas->zoom);
504 vec = art_vpath_affine_transform(node->path,dst);
505 if (node->closed_path)
506 gfx_libart_close_path(canvas, node, &vec);
507 gfx_round_scaled_coordinates(canvas, node, vec);
508 if(node->type == GFX_LINE){
509 svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
510 ART_PATH_STROKE_CAP_ROUND,
511 node->size*canvas->zoom,1,1);
512 } else {
513 svp = art_svp_from_vpath ( vec );
514 }
515 art_free(vec);
516 art_rgb_svp_alpha (svp ,0,0, pys_width, pys_height,
517 node->color, buffer, rowstride, NULL);
518 art_free(svp);
519 break;
520 }
521 case GFX_TEXT: {
522 unsigned int n;
523 int error;
524 art_u8 fcolor[3],falpha;
525 FT_Face face;
526 gfx_char glyph;
527 gfx_string string;
528 FT_Vector vec; /* 26.6 */
530 float pen_x = 0.0 , pen_y = 0.0;
531 /* double x,y; */
532 long ix,iy,iz;
534 fcolor[0] = node->color >> 24;
535 fcolor[1] = (node->color >> 16) & 0xff;
536 fcolor[2] = (node->color >> 8) & 0xff;
537 falpha = node->color & 0xff;
538 error = FT_New_Face( library,
539 (char *)node->filename,
540 0,
541 &face );
542 if ( error ) break;
544 error = FT_Set_Char_Size(face, /* handle to face object */
545 (long)(node->size*64),
546 (long)(node->size*64),
547 (long)(100*canvas->zoom),
548 (long)(100*canvas->zoom));
549 if ( error ) break;
550 pen_x = node->x * canvas->zoom;
551 pen_y = node->y * canvas->zoom;
553 string = gfx_string_create (face, node->text, node->angle);
554 switch(node->halign){
555 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
556 break;
557 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
558 -string->bbox.xMax/2:-string->bbox.xMin/2;
559 break;
560 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
561 break;
562 case GFX_H_NULL: vec.x = 0;
563 break;
564 }
566 switch(node->valign){
567 case GFX_V_TOP: vec.y = string->bbox.yMax;
568 break;
569 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
570 string->bbox.yMax/2:string->bbox.yMin/2;
571 break;
572 case GFX_V_BOTTOM: vec.y = 0;
573 break;
574 case GFX_V_NULL: vec.y = 0;
575 break;
576 }
577 pen_x += vec.x/64;
578 pen_y += vec.y/64;
579 glyph = string->glyphs;
580 for(n=0; n<string->num_glyphs; ++n, ++glyph) {
581 int gr;
582 FT_Glyph image;
583 FT_BitmapGlyph bit;
585 /* make copy to transform */
586 if (! glyph->image) {
587 fprintf (stderr, "no image\n");
588 continue;
589 }
590 error = FT_Glyph_Copy (glyph->image, &image);
591 if (error) {
592 fprintf (stderr, "couldn't copy image\n");
593 continue;
594 }
596 /* transform it */
597 vec = glyph->pos;
598 FT_Vector_Transform (&vec, &string->transform);
600 bit = (FT_BitmapGlyph) image;
602 gr = bit->bitmap.num_grays -1;
603 for (iy=0; iy < bit->bitmap.rows; iy++){
604 long buf_y = iy+(pen_y+0.5)-bit->top;
605 if (buf_y < 0 || buf_y >= pys_height) continue;
606 buf_y *= rowstride;
607 for (ix=0;ix < bit->bitmap.width;ix++){
608 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
609 art_u8 font_alpha;
611 if (buf_x < 0 || buf_x >= pys_width) continue;
612 buf_x *= bytes_per_pixel ;
613 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
614 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
615 for (iz = 0; iz < 3; iz++){
616 art_u8 *orig = buffer + buf_y + buf_x + iz;
617 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
618 (double)fcolor[iz] / gr * (font_alpha));
619 }
620 }
621 }
622 FT_Done_Glyph (image);
623 }
624 gfx_string_destroy(string);
625 }
626 }
627 node = node->next;
628 }
629 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
630 art_free(buffer);
631 FT_Done_FreeType( library );
632 return 0;
633 }
635 /* free memory used by nodes this will also remove memory required for
636 associated paths and svcs ... but not for text strings */
637 int
638 gfx_destroy (gfx_canvas_t *canvas){
639 gfx_node_t *next,*node = canvas->firstnode;
640 while(node){
641 next = node->next;
642 art_free(node->path);
643 art_free(node->svp);
644 free(node->text);
645 free(node->filename);
646 art_free(node);
647 node = next;
648 }
649 return 0;
650 }
652 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
653 png_structp png_ptr = NULL;
654 png_infop info_ptr = NULL;
655 int i;
656 png_bytep *row_pointers;
657 int rowstride = width * bytes_per_pixel;
658 png_text text[2];
660 if (fp == NULL)
661 return (1);
663 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
664 if (png_ptr == NULL)
665 {
666 return (1);
667 }
668 row_pointers = (png_bytepp)png_malloc(png_ptr,
669 height*sizeof(png_bytep));
671 info_ptr = png_create_info_struct(png_ptr);
673 if (info_ptr == NULL)
674 {
675 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
676 return (1);
677 }
679 if (setjmp(png_jmpbuf(png_ptr)))
680 {
681 /* If we get here, we had a problem writing the file */
682 png_destroy_write_struct(&png_ptr, &info_ptr);
683 return (1);
684 }
686 png_init_io(png_ptr, fp);
687 png_set_IHDR (png_ptr, info_ptr,width, height,
688 8, PNG_COLOR_TYPE_RGB,
689 PNG_INTERLACE_NONE,
690 PNG_COMPRESSION_TYPE_DEFAULT,
691 PNG_FILTER_TYPE_DEFAULT);
693 text[0].key = "Software";
694 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
695 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
696 png_set_text (png_ptr, info_ptr, text, 1);
698 /* Write header data */
699 png_write_info (png_ptr, info_ptr);
701 for (i = 0; i < height; i++)
702 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
704 png_write_image(png_ptr, row_pointers);
705 png_write_end(png_ptr, info_ptr);
706 png_destroy_write_struct(&png_ptr, &info_ptr);
707 return 1;
708 }
711 /* ------- SVG -------
712 SVG reference:
713 http://www.w3.org/TR/SVG/
714 */
715 static int svg_indent = 0;
716 static int svg_single_line = 0;
717 static const char *svg_default_font = "Helvetica";
718 typedef struct svg_dash
719 {
720 int dash_enable;
721 double dash_adjust, dash_len, dash_offset;
722 double adjusted_on, adjusted_off;
723 } svg_dash;
726 static void svg_print_indent(FILE *fp)
727 {
728 int i;
729 for (i = svg_indent - svg_single_line; i > 0; i--) {
730 putc(' ', fp);
731 putc(' ', fp);
732 }
733 }
735 static void svg_start_tag(FILE *fp, const char *name)
736 {
737 svg_print_indent(fp);
738 putc('<', fp);
739 fputs(name, fp);
740 svg_indent++;
741 }
743 static void svg_close_tag_single_line(FILE *fp)
744 {
745 svg_single_line++;
746 putc('>', fp);
747 }
749 static void svg_close_tag(FILE *fp)
750 {
751 putc('>', fp);
752 if (!svg_single_line)
753 putc('\n', fp);
754 }
756 static void svg_end_tag(FILE *fp, const char *name)
757 {
758 /* name is NULL if closing empty-node tag */
759 svg_indent--;
760 if (svg_single_line)
761 svg_single_line--;
762 else if (name)
763 svg_print_indent(fp);
764 if (name != NULL) {
765 fputs("</", fp);
766 fputs(name, fp);
767 } else {
768 putc('/', fp);
769 }
770 svg_close_tag(fp);
771 }
773 static void svg_close_tag_empty_node(FILE *fp)
774 {
775 svg_end_tag(fp, NULL);
776 }
778 static void svg_write_text(FILE *fp, const char *text)
779 {
780 const unsigned char *p, *start, *last;
781 unsigned int ch;
782 p = (const unsigned char*)text;
783 if (!p)
784 return;
785 /* trim leading spaces */
786 while (*p == ' ')
787 p++;
788 start = p;
789 /* trim trailing spaces */
790 last = p - 1;
791 while ((ch = *p) != 0) {
792 if (ch != ' ')
793 last = p;
794 p++;
795 }
796 /* encode trimmed text */
797 p = start;
798 while (p <= last) {
799 ch = *p++;
800 ch = afm_host2unicode(ch); /* unsafe macro */
801 switch (ch) {
802 case '&': fputs("&", fp); break;
803 case '<': fputs("<", fp); break;
804 case '>': fputs(">", fp); break;
805 case '"': fputs(""", fp); break;
806 default:
807 if (ch >= 127)
808 fprintf(fp, "&#%d;", ch);
809 else
810 putc(ch, fp);
811 }
812 }
813 }
815 static void svg_format_number(char *buf, int bufsize, double d)
816 {
817 /* omit decimals if integer to reduce filesize */
818 char *p;
819 snprintf(buf, bufsize, "%.2f", d);
820 p = buf; /* doesn't trust snprintf return value */
821 while (*p)
822 p++;
823 while (--p > buf) {
824 char ch = *p;
825 if (ch == '0') {
826 *p = '\0'; /* zap trailing zeros */
827 continue;
828 }
829 if (ch == '.')
830 *p = '\0'; /* zap trailing dot */
831 break;
832 }
833 }
835 static void svg_write_number(FILE *fp, double d)
836 {
837 char buf[60];
838 svg_format_number(buf, sizeof(buf), d);
839 fputs(buf, fp);
840 }
842 static int svg_color_is_black(int c)
843 {
844 /* gfx_color_t is RRGGBBAA */
845 return c == 0x000000FF;
846 }
848 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
849 {
850 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
851 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
852 gfx_color_t opacity = c & 0xFF;
853 fprintf(fp, " %s=\"", attr);
854 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
855 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
856 fprintf(fp, "#%03lX",
857 ( ((rrggbb >> 8) & 0xF00)
858 | ((rrggbb >> 4) & 0x0F0)
859 | ( rrggbb & 0x00F)));
860 } else {
861 fprintf(fp, "#%06lX", rrggbb);
862 }
863 fputs("\"", fp);
864 if (opacity != 0xFF) {
865 fprintf(fp, " stroke-opacity=\"");
866 svg_write_number(fp, opacity / 255.0);
867 fputs("\"", fp);
868 }
869 }
871 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
872 {
873 double offset;
874 int mult;
875 if (node->dash_on <= 0 || node->dash_off <= 0) {
876 d->dash_enable = 0;
877 return;
878 }
879 d->dash_enable = 1;
880 d->dash_len = node->dash_on + node->dash_off;
881 /* dash on/off adjustment due to round caps */
882 d->dash_adjust = 0.8 * node->size;
883 d->adjusted_on = node->dash_on - d->dash_adjust;
884 if (d->adjusted_on < 0.01)
885 d->adjusted_on = 0.01;
886 d->adjusted_off = d->dash_len - d->adjusted_on;
887 /* dash offset calc */
888 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
889 offset = node->path[0].y;
890 else
891 offset = node->path[0].x;
892 mult = (int)fabs(offset / d->dash_len);
893 d->dash_offset = offset - mult * d->dash_len;
894 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
895 d->dash_offset = d->dash_len - d->dash_offset;
896 }
898 static int svg_dash_equal(svg_dash *a, svg_dash *b)
899 {
900 if (a->dash_enable != b->dash_enable)
901 return 0;
902 if (a->adjusted_on != b->adjusted_on)
903 return 0;
904 if (a->adjusted_off != b->adjusted_off)
905 return 0;
906 /* rest of properties will be the same when on+off are */
907 return 1;
908 }
910 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
911 {
912 svg_dash dash_info;
913 svg_get_dash(node, &dash_info);
914 fputs(" stroke-width=\"", fp);
915 svg_write_number(fp, node->size);
916 fputs("\"", fp);
917 svg_write_color(fp, node->color, "stroke");
918 fputs(" fill=\"none\"", fp);
919 if (dash_info.dash_enable) {
920 if (dash_info.dash_offset != 0) {
921 fputs(" stroke-dashoffset=\"", fp);
922 svg_write_number(fp, dash_info.dash_offset);
923 fputs("\"", fp);
924 }
925 fputs(" stroke-dasharray=\"", fp);
926 svg_write_number(fp, dash_info.adjusted_on);
927 fputs(",", fp);
928 svg_write_number(fp, dash_info.adjusted_off);
929 fputs("\"", fp);
930 }
931 }
933 static int svg_is_int_step(double a, double b)
934 {
935 double diff = fabs(a - b);
936 return floor(diff) == diff;
937 }
939 static int svg_path_straight_segment(FILE *fp,
940 double lastA, double currentA, double currentB,
941 gfx_node_t *node,
942 int segment_idx, int isx, char absChar, char relChar)
943 {
944 if (!svg_is_int_step(lastA, currentA)) {
945 putc(absChar, fp);
946 svg_write_number(fp, currentA);
947 return 0;
948 }
949 if (segment_idx < node->points - 1) {
950 ArtVpath *vec = node->path + segment_idx + 1;
951 if (vec->code == ART_LINETO) {
952 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
953 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
954 if (nextB == currentB
955 && ((currentA >= lastA) == (nextA >= currentA))
956 && svg_is_int_step(currentA, nextA)) {
957 return 1; /* skip to next as it is a straight line */
958 }
959 }
960 }
961 putc(relChar, fp);
962 svg_write_number(fp, currentA - lastA);
963 return 0;
964 }
966 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
967 {
968 int i;
969 double lastX = 0, lastY = 0;
970 /* for straight lines <path..> tags take less space than
971 <line..> tags because of the efficient packing
972 in the 'd' attribute */
973 svg_start_tag(fp, "path");
974 if (!multi)
975 svg_common_path_attributes(fp, node);
976 fputs(" d=\"", fp);
977 /* specification of the 'd' attribute: */
978 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
979 for (i = 0; i < node->points; i++) {
980 ArtVpath *vec = node->path + i;
981 double x = vec->x - LINEOFFSET;
982 double y = vec->y - LINEOFFSET;
983 switch (vec->code) {
984 case ART_MOVETO_OPEN: /* fall-through */
985 case ART_MOVETO:
986 putc('M', fp);
987 svg_write_number(fp, x);
988 putc(',', fp);
989 svg_write_number(fp, y);
990 break;
991 case ART_LINETO:
992 /* try optimize filesize by using minimal lineto commands */
993 /* without introducing rounding errors. */
994 if (x == lastX) {
995 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
996 continue;
997 } else if (y == lastY) {
998 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
999 continue;
1000 } else {
1001 putc('L', fp);
1002 svg_write_number(fp, x);
1003 putc(',', fp);
1004 svg_write_number(fp, y);
1005 }
1006 break;
1007 case ART_CURVETO: break; /* unsupported */
1008 case ART_END: break; /* nop */
1009 }
1010 lastX = x;
1011 lastY = y;
1012 }
1013 if (node->closed_path)
1014 fputs(" Z", fp);
1015 fputs("\"", fp);
1016 svg_close_tag_empty_node(fp);
1017 }
1019 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1020 {
1021 /* optimize for multiple paths with the same color, penwidth, etc. */
1022 int num = 1;
1023 gfx_node_t *node = *nodeR;
1024 gfx_node_t *next = node->next;
1025 while (next) {
1026 if (next->type != node->type
1027 || next->size != node->size
1028 || next->color != node->color
1029 || next->dash_on != node->dash_on
1030 || next->dash_off != node->dash_off)
1031 break;
1032 next = next->next;
1033 num++;
1034 }
1035 if (num == 1) {
1036 svg_path(fp, node, 0);
1037 return;
1038 }
1039 svg_start_tag(fp, "g");
1040 svg_common_path_attributes(fp, node);
1041 svg_close_tag(fp);
1042 while (num && node) {
1043 svg_path(fp, node, 1);
1044 if (!--num)
1045 break;
1046 node = node->next;
1047 *nodeR = node;
1048 }
1049 svg_end_tag(fp, "g");
1050 }
1052 static void svg_area(FILE *fp, gfx_node_t *node)
1053 {
1054 int i;
1055 double startX = 0, startY = 0;
1056 svg_start_tag(fp, "polygon");
1057 fputs(" ", fp);
1058 svg_write_color(fp, node->color, "fill");
1059 fputs(" points=\"", fp);
1060 for (i = 0; i < node->points; i++) {
1061 ArtVpath *vec = node->path + i;
1062 double x = vec->x - LINEOFFSET;
1063 double y = vec->y - LINEOFFSET;
1064 switch (vec->code) {
1065 case ART_MOVETO_OPEN: /* fall-through */
1066 case ART_MOVETO:
1067 svg_write_number(fp, x);
1068 putc(',', fp);
1069 svg_write_number(fp, y);
1070 startX = x;
1071 startY = y;
1072 break;
1073 case ART_LINETO:
1074 if (i == node->points - 2
1075 && node->path[i + 1].code == ART_END
1076 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1077 break; /* poly area always closed, no need for last point */
1078 }
1079 putc(' ', fp);
1080 svg_write_number(fp, x);
1081 putc(',', fp);
1082 svg_write_number(fp, y);
1083 break;
1084 case ART_CURVETO: break; /* unsupported */
1085 case ART_END: break; /* nop */
1086 }
1087 }
1088 fputs("\"", fp);
1089 svg_close_tag_empty_node(fp);
1090 }
1092 static void svg_text(FILE *fp, gfx_node_t *node)
1093 {
1094 double x = node->x - LINEOFFSET;
1095 double y = node->y - LINEOFFSET;
1096 if (node->angle != 0) {
1097 svg_start_tag(fp, "g");
1098 fputs(" transform=\"translate(", fp);
1099 svg_write_number(fp, x);
1100 fputs(",", fp);
1101 svg_write_number(fp, y);
1102 fputs(") rotate(", fp);
1103 svg_write_number(fp, node->angle);
1104 fputs(")\"", fp);
1105 x = y = 0;
1106 svg_close_tag(fp);
1107 }
1108 switch (node->valign) {
1109 case GFX_V_TOP: y += node->size; break;
1110 case GFX_V_CENTER: y += node->size / 3; break;
1111 case GFX_V_BOTTOM: break;
1112 case GFX_V_NULL: break;
1113 }
1114 svg_start_tag(fp, "text");
1115 fputs(" x=\"", fp);
1116 svg_write_number(fp, x);
1117 fputs("\" y=\"", fp);
1118 svg_write_number(fp, y);
1120 /* if (strcmp(node->filename, svg_default_font))
1121 fprintf(fp, " font-family=\"%s\"", node->filename);
1122 */
1123 fputs("\" font-family=\"Helvetica", fp);
1124 fputs("\" font-size=\"", fp);
1125 svg_write_number(fp, node->size);
1126 fputs("\"", fp);
1127 if (!svg_color_is_black(node->color))
1128 svg_write_color(fp, node->color, "fill");
1129 switch (node->halign) {
1130 case GFX_H_RIGHT: fputs(" text-anchor=\"end\"", fp); break;
1131 case GFX_H_CENTER: fputs(" text-anchor=\"middle\"", fp); break;
1132 case GFX_H_LEFT: break;
1133 case GFX_H_NULL: break;
1134 }
1135 svg_close_tag_single_line(fp);
1136 /* support for node->tabwidth missing */
1137 svg_write_text(fp, node->text);
1138 svg_end_tag(fp, "text");
1139 if (node->angle != 0)
1140 svg_end_tag(fp, "g");
1141 }
1143 int gfx_render_svg (gfx_canvas_t *canvas,
1144 art_u32 width, art_u32 height,
1145 gfx_color_t background, FILE *fp){
1146 gfx_node_t *node = canvas->firstnode;
1147 fputs(
1148 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1149 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1150 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1151 "<!--\n"
1152 " SVG file created by RRDtool,\n"
1153 " Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch\n"
1154 "\n"
1155 " The width/height attributes in the outhermost svg node\n"
1156 " are just default sizes for the browser which is used\n"
1157 " if the svg file is openened directly without being\n"
1158 " embedded in an html file.\n"
1159 " The viewBox is the local coord system for rrdtool.\n"
1160 "-->\n", fp);
1161 svg_start_tag(fp, "svg");
1162 fputs(" width=\"", fp);
1163 svg_write_number(fp, width * canvas->zoom);
1164 fputs("\" height=\"", fp);
1165 svg_write_number(fp, height * canvas->zoom);
1166 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1167 svg_write_number(fp, -LINEOFFSET);
1168 fputs(" ", fp);
1169 svg_write_number(fp, -LINEOFFSET);
1170 fputs(" ", fp);
1171 svg_write_number(fp, width - LINEOFFSET);
1172 fputs(" ", fp);
1173 svg_write_number(fp, height - LINEOFFSET);
1174 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1175 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1176 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1177 svg_close_tag(fp);
1178 svg_start_tag(fp, "rect");
1179 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1180 svg_write_color(fp, background, "fill");
1181 svg_close_tag_empty_node(fp);
1182 while (node) {
1183 switch (node->type) {
1184 case GFX_LINE:
1185 svg_multi_path(fp, &node);
1186 break;
1187 case GFX_AREA:
1188 svg_area(fp, node);
1189 break;
1190 case GFX_TEXT:
1191 svg_text(fp, node);
1192 }
1193 node = node->next;
1194 }
1195 svg_end_tag(fp, "svg");
1196 return 0;
1197 }
1199 /* ------- EPS -------
1200 EPS and Postscript references:
1201 http://partners.adobe.com/asn/developer/technotes/postscript.html
1202 */
1204 typedef struct eps_font
1205 {
1206 const char *ps_font;
1207 int id;
1208 struct eps_font *next;
1209 } eps_font;
1211 typedef struct eps_state
1212 {
1213 FILE *fp;
1214 gfx_canvas_t *canvas;
1215 art_u32 page_width, page_height;
1216 eps_font *font_list;
1217 /*--*/
1218 gfx_color_t color;
1219 const char *font;
1220 double font_size;
1221 double line_width;
1222 int linecap, linejoin;
1223 int has_dash;
1224 } eps_state;
1226 static void eps_set_color(eps_state *state, gfx_color_t color)
1227 {
1228 /* gfx_color_t is RRGGBBAA */
1229 if (state->color == color)
1230 return;
1231 fprintf(state->fp, "%d %d %d Rgb\n",
1232 (int)((color >> 24) & 255),
1233 (int)((color >> 16) & 255),
1234 (int)((color >> 8) & 255));
1235 state->color = color;
1236 }
1238 static int eps_add_font(eps_state *state, gfx_node_t *node)
1239 {
1240 /* The fonts list could be postponed to the end using
1241 (atend), but let's be nice and have them in the header. */
1242 const char *ps_font = afm_get_font_postscript_name(node->filename);
1243 eps_font *ef;
1244 for (ef = state->font_list; ef; ef = ef->next) {
1245 if (!strcmp(ps_font, ef->ps_font))
1246 return 0;
1247 }
1248 ef = malloc(sizeof(eps_font));
1249 if (ef == NULL) {
1250 rrd_set_error("malloc for eps_font");
1251 return -1;
1252 }
1253 ef->next = state->font_list;
1254 ef->ps_font = ps_font;
1255 state->font_list = ef;
1256 return 0;
1257 }
1259 static void eps_list_fonts(eps_state *state, const char *dscName)
1260 {
1261 eps_font *ef;
1262 int lineLen = strlen(dscName);
1263 if (!state->font_list)
1264 return;
1265 fputs(dscName, state->fp);
1266 for (ef = state->font_list; ef; ef = ef->next) {
1267 int nameLen = strlen(ef->ps_font);
1268 if (lineLen + nameLen > 100 && lineLen) {
1269 fputs("\n", state->fp);
1270 fputs("%%- \n", state->fp);
1271 lineLen = 5;
1272 } else {
1273 fputs(" ", state->fp);
1274 lineLen++;
1275 }
1276 fputs(ef->ps_font, state->fp);
1277 lineLen += nameLen;
1278 }
1279 fputs("\n", state->fp);
1280 }
1282 static void eps_define_fonts(eps_state *state)
1283 {
1284 eps_font *ef;
1285 if (!state->font_list)
1286 return;
1287 for (ef = state->font_list; ef; ef = ef->next) {
1288 /* PostScript¨ LANGUAGE REFERENCE third edition
1289 page 349 */
1290 fprintf(state->fp,
1291 "%%\n"
1292 "/%s findfont dup length dict begin\n"
1293 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1294 "/Encoding ISOLatin1Encoding def\n"
1295 "currentdict end\n"
1296 "/%s-ISOLatin1 exch definefont pop\n"
1297 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1298 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1299 }
1300 }
1302 static int eps_prologue(eps_state *state)
1303 {
1304 gfx_node_t *node;
1305 fputs(
1306 "%!PS-Adobe-3.0 EPSF-3.0\n"
1307 "%%Creator: RRDtool 1.1.x, Tobias Oetiker, http://tobi.oetiker.ch\n"
1308 /* can't like weird chars here */
1309 "%%Title: (RRDtool output)\n"
1310 "%%DocumentData: Clean7Bit\n"
1311 "", state->fp);
1312 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1313 state->page_width, state->page_height);
1314 for (node = state->canvas->firstnode; node; node = node->next) {
1315 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1316 return -1;
1317 }
1318 eps_list_fonts(state, "%%DocumentFonts:");
1319 eps_list_fonts(state, "%%DocumentNeededFonts:");
1320 fputs(
1321 "%%EndComments\n"
1322 "%%BeginProlog\n"
1323 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1324 "/bd { bind def } bind def\n"
1325 "", state->fp);
1326 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1327 fputs(
1328 "/X2 {X exch X exch} bd\n"
1329 "/M {X2 moveto} bd\n"
1330 "/L {X2 lineto} bd\n"
1331 "/m {moveto} bd\n"
1332 "/l {lineto} bd\n"
1333 "/S {stroke} bd\n"
1334 "/CP {closepath} bd\n"
1335 "/WS {setlinewidth stroke} bd\n"
1336 "/F {fill} bd\n"
1337 "/TaL { } bd\n"
1338 "/TaC {dup stringwidth pop neg 2 div 0 rmoveto } bd\n"
1339 "/TaR {dup stringwidth pop neg 0 rmoveto } bd\n"
1340 "/TL {moveto TaL show} bd\n"
1341 "/TC {moveto TaC show} bd\n"
1342 "/TR {moveto TaR show} bd\n"
1343 "/Rgb { 255.0 div 3 1 roll\n"
1344 " 255.0 div 3 1 roll \n"
1345 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1346 "", state->fp);
1347 eps_define_fonts(state);
1348 return 0;
1349 }
1351 static void eps_clear_dash(eps_state *state)
1352 {
1353 if (!state->has_dash)
1354 return;
1355 state->has_dash = 0;
1356 fputs("[1 0] 0 setdash\n", state->fp);
1357 }
1359 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1360 {
1361 int i;
1362 FILE *fp = state->fp;
1363 int useOffset = 0;
1364 int clearDashIfAny = 1;
1365 eps_set_color(state, node->color);
1366 if (node->type == GFX_LINE) {
1367 svg_dash dash_info;
1368 if (state->linecap != 1) {
1369 fputs("1 setlinecap\n", fp);
1370 state->linecap = 1;
1371 }
1372 if (state->linejoin != 1) {
1373 fputs("1 setlinejoin\n", fp);
1374 state->linejoin = 1;
1375 }
1376 svg_get_dash(node, &dash_info);
1377 if (dash_info.dash_enable) {
1378 clearDashIfAny = 0;
1379 state->has_dash = 1;
1380 fputs("[", fp);
1381 svg_write_number(fp, dash_info.adjusted_on);
1382 fputs(" ", fp);
1383 svg_write_number(fp, dash_info.adjusted_off);
1384 fputs("] ", fp);
1385 svg_write_number(fp, dash_info.dash_offset);
1386 fputs(" setdash\n", fp);
1387 }
1388 }
1389 if (clearDashIfAny)
1390 eps_clear_dash(state);
1391 for (i = 0; i < node->points; i++) {
1392 ArtVpath *vec = node->path + i;
1393 double x = vec->x;
1394 double y = state->page_height - vec->y;
1395 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1396 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1397 if (useOffset) {
1398 x -= LINEOFFSET;
1399 y -= LINEOFFSET;
1400 }
1401 switch (vec->code) {
1402 case ART_MOVETO_OPEN: /* fall-through */
1403 case ART_MOVETO:
1404 svg_write_number(fp, x);
1405 fputc(' ', fp);
1406 svg_write_number(fp, y);
1407 fputc(' ', fp);
1408 fputs(useOffset ? "M\n" : "m\n", fp);
1409 break;
1410 case ART_LINETO:
1411 svg_write_number(fp, x);
1412 fputc(' ', fp);
1413 svg_write_number(fp, y);
1414 fputc(' ', fp);
1415 fputs(useOffset ? "L\n" : "l\n", fp);
1416 break;
1417 case ART_CURVETO: break; /* unsupported */
1418 case ART_END: break; /* nop */
1419 }
1420 }
1421 if (node->type == GFX_LINE) {
1422 if (node->closed_path)
1423 fputs("CP ", fp);
1424 if (node->size != state->line_width) {
1425 state->line_width = node->size;
1426 svg_write_number(fp, state->line_width);
1427 fputs(" WS\n", fp);
1428 } else {
1429 fputs("S\n", fp);
1430 }
1431 } else {
1432 fputs("F\n", fp);
1433 }
1434 }
1436 static void eps_write_text(eps_state *state, gfx_node_t *node)
1437 {
1438 FILE *fp = state->fp;
1439 const unsigned char *p;
1440 const char *ps_font = afm_get_font_postscript_name(node->filename);
1441 char align = 'L';
1442 double x = node->x;
1443 double y = state->page_height - node->y, ydelta = 0;
1444 int lineLen = 0;
1445 eps_set_color(state, node->color);
1446 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1447 state->font = ps_font;
1448 state->font_size = node->size;
1449 svg_write_number(fp, state->font_size);
1450 fprintf(fp, " SetFont-%s\n", state->font);
1451 }
1452 fputs("(", fp);
1453 lineLen = 20;
1454 for (p = (const unsigned char*)node->text; *p; p++) {
1455 if (lineLen > 70) {
1456 fputs("\\\n", fp); /* backslash and \n */
1457 lineLen = 0;
1458 }
1459 switch (*p) {
1460 case '(':
1461 case ')':
1462 case '\\':
1463 case '\n':
1464 case '\r':
1465 case '\t':
1466 fputc('\\', fp);
1467 lineLen++;
1468 /* fall-through */
1469 default:
1470 if (*p >= 126)
1471 fprintf(fp, "\\%03o", *p);
1472 else
1473 fputc(*p, fp);
1474 lineLen++;
1475 }
1476 }
1477 fputs(") ", fp);
1478 switch(node->valign){
1479 case GFX_V_TOP: ydelta = -node->size; break;
1480 case GFX_V_CENTER: ydelta = -node->size / 3.0; break;
1481 case GFX_V_BOTTOM: break;
1482 case GFX_V_NULL: break;
1483 }
1484 if (node->angle == 0)
1485 y += ydelta;
1486 switch (node->halign) {
1487 case GFX_H_RIGHT: align = 'R'; break;
1488 case GFX_H_CENTER: align = 'C'; break;
1489 case GFX_H_LEFT: align= 'L'; break;
1490 case GFX_H_NULL: align= 'L'; break;
1491 }
1492 if (node->angle != 0) {
1493 fputs("\n", fp);
1494 fputs(" gsave ", fp);
1495 svg_write_number(fp, x);
1496 fputc(' ', fp);
1497 svg_write_number(fp, y);
1498 fputs(" translate ", fp);
1499 svg_write_number(fp, -node->angle);
1500 fputs(" rotate 0 ", fp);
1501 svg_write_number(fp, ydelta);
1502 fputs(" moveto ", fp);
1503 fprintf(fp, "Ta%c", align);
1504 fputs(" show grestore\n", fp);
1505 } else {
1506 svg_write_number(fp, x);
1507 fputc(' ', fp);
1508 svg_write_number(fp, y);
1509 fputs(" T", fp);
1510 fputc(align, fp);
1511 fputc('\n', fp);
1512 }
1513 }
1515 static int eps_write_content(eps_state *state)
1516 {
1517 gfx_node_t *node;
1518 fputs("%\n", state->fp);
1519 for (node = state->canvas->firstnode; node; node = node->next) {
1520 switch (node->type) {
1521 case GFX_LINE:
1522 case GFX_AREA:
1523 eps_write_linearea(state, node);
1524 break;
1525 case GFX_TEXT:
1526 eps_write_text(state, node);
1527 break;
1528 }
1529 }
1530 return 0;
1531 }
1533 int gfx_render_eps (gfx_canvas_t *canvas,
1534 art_u32 width, art_u32 height,
1535 gfx_color_t background, FILE *fp){
1536 struct eps_state state;
1537 state.fp = fp;
1538 state.canvas = canvas;
1539 state.page_width = width;
1540 state.page_height = height;
1541 state.font = "no-default-font";
1542 state.font_size = -1;
1543 state.color = 0; /* black */
1544 state.font_list = NULL;
1545 state.linecap = -1;
1546 state.linejoin = -1;
1547 state.has_dash = 0;
1548 if (eps_prologue(&state) == -1)
1549 return -1;
1550 eps_set_color(&state, background);
1551 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1552 height, width, height, width);
1553 if (eps_write_content(&state) == -1)
1554 return 0;
1555 fputs("showpage\n", fp);
1556 fputs("%%EOF\n", fp);
1557 while (state.font_list) {
1558 eps_font *next = state.font_list->next;
1559 free(state.font_list);
1560 state.font_list = next;
1561 }
1562 return 0;
1563 }
1565 /* ------- PDF -------
1566 PDF references page:
1567 http://partners.adobe.com/asn/developer/technotes/acrobatpdf.html
1568 */
1570 typedef struct pdf_buffer
1571 {
1572 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1573 char *data;
1574 int alloc_size, current_size;
1575 struct pdf_buffer *previous_buffer, *next_buffer;
1576 struct pdf_state *state;
1577 } pdf_buffer;
1579 typedef struct pdf_font
1580 {
1581 const char *ps_font;
1582 pdf_buffer obj;
1583 struct pdf_font *next;
1584 } pdf_font;
1586 typedef struct pdf_state
1587 {
1588 FILE *fp;
1589 gfx_canvas_t *canvas;
1590 art_u32 page_width, page_height;
1591 pdf_font *font_list;
1592 pdf_buffer *first_buffer, *last_buffer;
1593 int pdf_file_pos;
1594 int has_failed;
1595 /*--*/
1596 gfx_color_t stroke_color, fill_color;
1597 int font_id;
1598 double font_size;
1599 double line_width;
1600 svg_dash dash;
1601 int linecap, linejoin;
1602 int last_obj_id;
1603 /*--*/
1604 pdf_buffer pdf_header;
1605 pdf_buffer catalog_obj, pages_obj, page1_obj;
1606 pdf_buffer fontsdict_obj;
1607 pdf_buffer graph_stream;
1608 } pdf_state;
1610 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1611 {
1612 int initial_size = 32;
1613 buf->state = state;
1614 buf->id = -42;
1615 buf->alloc_size = 0;
1616 buf->current_size = 0;
1617 buf->data = (char*)malloc(initial_size);
1618 buf->is_obj = 0;
1619 buf->previous_buffer = NULL;
1620 buf->next_buffer = NULL;
1621 if (buf->data == NULL) {
1622 rrd_set_error("malloc for pdf_buffer data");
1623 state->has_failed = 1;
1624 return;
1625 }
1626 buf->alloc_size = initial_size;
1627 if (state->last_buffer)
1628 state->last_buffer->next_buffer = buf;
1629 if (state->first_buffer == NULL)
1630 state->first_buffer = buf;
1631 buf->previous_buffer = state->last_buffer;
1632 state->last_buffer = buf;
1633 }
1635 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1636 {
1637 if (len <= 0)
1638 return;
1639 if (buf->alloc_size < buf->current_size + len) {
1640 int new_size = buf->alloc_size;
1641 char *new_buf;
1642 while (new_size < buf->current_size + len)
1643 new_size *= 4;
1644 new_buf = (char*)malloc(new_size);
1645 if (new_buf == NULL) {
1646 rrd_set_error("re-malloc for pdf_buffer data");
1647 buf->state->has_failed = 1;
1648 return;
1649 }
1650 memcpy(new_buf, buf->data, buf->current_size);
1651 free(buf->data);
1652 buf->data = new_buf;
1653 buf->alloc_size = new_size;
1654 }
1655 memcpy(buf->data + buf->current_size, text, len);
1656 buf->current_size += len;
1657 }
1659 static void pdf_puts(pdf_buffer *buf, const char *text)
1660 {
1661 pdf_put(buf, text, strlen(text));
1662 }
1664 static void pdf_indent(pdf_buffer *buf)
1665 {
1666 pdf_puts(buf, "\t");
1667 }
1669 static void pdf_putsi(pdf_buffer *buf, const char *text)
1670 {
1671 pdf_indent(buf);
1672 pdf_puts(buf, text);
1673 }
1675 static void pdf_putint(pdf_buffer *buf, int i)
1676 {
1677 char tmp[20];
1678 sprintf(tmp, "%d", i);
1679 pdf_puts(buf, tmp);
1680 }
1682 static void pdf_putnumber(pdf_buffer *buf, double d)
1683 {
1684 char tmp[50];
1685 svg_format_number(tmp, sizeof(tmp), d);
1686 pdf_puts(buf, tmp);
1687 }
1689 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
1690 {
1691 pdf_init_buffer(state, buf);
1692 buf->id = ++state->last_obj_id;
1693 buf->is_obj = 1;
1694 buf->is_stream = 0;
1695 }
1697 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
1698 {
1699 pdf_init_object(state, buf);
1700 buf->is_dict = 1;
1701 }
1703 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
1704 gfx_color_t *current_color, const char *op)
1705 {
1706 /* gfx_color_t is RRGGBBAA */
1707 if (*current_color == color)
1708 return;
1709 pdf_putnumber(buf, ((color >> 24) & 255) / 255.0);
1710 pdf_puts(buf, " ");
1711 pdf_putnumber(buf, ((color >> 16) & 255) / 255.0);
1712 pdf_puts(buf, " ");
1713 pdf_putnumber(buf, ((color >> 8) & 255) / 255.0);
1714 pdf_puts(buf, " ");
1715 pdf_puts(buf, op);
1716 pdf_puts(buf, "\n");
1717 *current_color = color;
1718 }
1720 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
1721 {
1722 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
1723 }
1725 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
1726 {
1727 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
1728 }
1730 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
1731 {
1732 const char *ps_font = afm_get_font_postscript_name(node->filename);
1733 pdf_font *ef;
1734 for (ef = state->font_list; ef; ef = ef->next) {
1735 if (!strcmp(ps_font, ef->ps_font))
1736 return ef;
1737 }
1738 return NULL;
1739 }
1741 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
1742 {
1743 pdf_font *ef = pdf_find_font(state, node);
1744 if (ef)
1745 return;
1746 ef = malloc(sizeof(pdf_font));
1747 if (ef == NULL) {
1748 rrd_set_error("malloc for pdf_font");
1749 state->has_failed = 1;
1750 return;
1751 }
1752 pdf_init_dict(state, &ef->obj);
1753 ef->next = state->font_list;
1754 ef->ps_font = afm_get_font_postscript_name(node->filename);
1755 state->font_list = ef;
1756 /* fonts dict */
1757 pdf_putsi(&state->fontsdict_obj, "/F");
1758 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1759 pdf_puts(&state->fontsdict_obj, " ");
1760 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1761 pdf_puts(&state->fontsdict_obj, " 0 R\n");
1762 /* fonts def */
1763 pdf_putsi(&ef->obj, "/Type /Font\n");
1764 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
1765 pdf_putsi(&ef->obj, "/Name /F");
1766 pdf_putint(&ef->obj, ef->obj.id);
1767 pdf_puts(&ef->obj, "\n");
1768 pdf_putsi(&ef->obj, "/BaseFont /");
1769 pdf_puts(&ef->obj, ef->ps_font);
1770 pdf_puts(&ef->obj, "\n");
1771 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
1772 /* 'Cp1252' (this is latin 1 extended with 27 characters;
1773 the encoding is also known as 'winansi')
1774 http://www.lowagie.com/iText/tutorial/ch09.html */
1775 }
1777 static void pdf_create_fonts(pdf_state *state)
1778 {
1779 gfx_node_t *node;
1780 for (node = state->canvas->firstnode; node; node = node->next) {
1781 if (node->type == GFX_TEXT)
1782 pdf_add_font(state, node);
1783 }
1784 }
1786 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
1787 {
1788 int i;
1789 pdf_buffer *s = &state->graph_stream;
1790 if (node->type == GFX_LINE) {
1791 svg_dash dash_info;
1792 svg_get_dash(node, &dash_info);
1793 if (!svg_dash_equal(&dash_info, &state->dash)) {
1794 state->dash = dash_info;
1795 if (dash_info.dash_enable) {
1796 pdf_puts(s, "[");
1797 pdf_putnumber(s, dash_info.adjusted_on);
1798 pdf_puts(s, " ");
1799 pdf_putnumber(s, dash_info.adjusted_off);
1800 pdf_puts(s, "] ");
1801 pdf_putnumber(s, dash_info.dash_offset);
1802 pdf_puts(s, " d\n");
1803 } else {
1804 pdf_puts(s, "[] 0 d\n");
1805 }
1806 }
1807 pdf_set_stroke_color(s, node->color);
1808 if (state->linecap != 1) {
1809 pdf_puts(s, "1 j\n");
1810 state->linecap = 1;
1811 }
1812 if (state->linejoin != 1) {
1813 pdf_puts(s, "1 J\n");
1814 state->linejoin = 1;
1815 }
1816 if (node->size != state->line_width) {
1817 state->line_width = node->size;
1818 pdf_putnumber(s, state->line_width);
1819 pdf_puts(s, " w\n");
1820 }
1821 } else {
1822 pdf_set_fill_color(s, node->color);
1823 }
1824 for (i = 0; i < node->points; i++) {
1825 ArtVpath *vec = node->path + i;
1826 double x = vec->x;
1827 double y = state->page_height - vec->y;
1828 if (node->type == GFX_AREA) {
1829 x += LINEOFFSET; /* adjust for libart handling of areas */
1830 y -= LINEOFFSET;
1831 }
1832 switch (vec->code) {
1833 case ART_MOVETO_OPEN: /* fall-through */
1834 case ART_MOVETO:
1835 pdf_putnumber(s, x);
1836 pdf_puts(s, " ");
1837 pdf_putnumber(s, y);
1838 pdf_puts(s, " m\n");
1839 break;
1840 case ART_LINETO:
1841 pdf_putnumber(s, x);
1842 pdf_puts(s, " ");
1843 pdf_putnumber(s, y);
1844 pdf_puts(s, " l\n");
1845 break;
1846 case ART_CURVETO: break; /* unsupported */
1847 case ART_END: break; /* nop */
1848 }
1849 }
1850 if (node->type == GFX_LINE) {
1851 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
1852 } else {
1853 pdf_puts(s, "f\n");
1854 }
1855 }
1857 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
1858 int last_was_text, int next_is_text)
1859 {
1860 char tmp[30];
1861 pdf_buffer *s = &state->graph_stream;
1862 const unsigned char *p;
1863 pdf_font *font = pdf_find_font(state, node);
1864 double x = node->x;
1865 double y = state->page_height - node->y;
1866 double dx = 0, dy = 0;
1867 double cos_a = 0, sin_a = 0;
1868 if (font == NULL) {
1869 rrd_set_error("font disappeared");
1870 state->has_failed = 1;
1871 return;
1872 }
1873 switch(node->valign){
1874 case GFX_V_TOP: dy = -node->size; break;
1875 case GFX_V_CENTER: dy = -node->size / 3.0; break;
1876 case GFX_V_BOTTOM: break;
1877 case GFX_V_NULL: break;
1878 }
1879 switch (node->halign) {
1880 case GFX_H_RIGHT: dx = -afm_get_text_width(0, font->ps_font,
1881 node->size, node->tabwidth, node->text);
1882 break;
1883 case GFX_H_CENTER: dx = -afm_get_text_width(0, font->ps_font,
1884 node->size, node->tabwidth, node->text) / 2;
1885 break;
1886 case GFX_H_LEFT: break;
1887 case GFX_H_NULL: break;
1888 }
1889 pdf_set_fill_color(s, node->color);
1890 if (node->angle != 0) {
1891 double a = 2 * M_PI * -node->angle / 360.0;
1892 double new_x, new_y;
1893 cos_a = cos(a);
1894 sin_a = sin(a);
1895 new_x = cos_a * dx - sin_a * dy + x;
1896 new_y = sin_a * dx + cos_a * dy + y;
1897 x = new_x;
1898 y = new_y;
1899 } else {
1900 x += dx;
1901 y += dy;
1902 }
1903 if (!last_was_text)
1904 pdf_puts(s, "BT\n");
1905 if (state->font_id != font->obj.id || node->size != state->font_size) {
1906 state->font_id = font->obj.id;
1907 state->font_size = node->size;
1908 pdf_puts(s, "/F");
1909 pdf_putint(s, font->obj.id);
1910 pdf_puts(s, " ");
1911 pdf_putnumber(s, node->size);
1912 pdf_puts(s, " Tf\n");
1913 }
1914 if (node->angle == 0) {
1915 pdf_puts(s, "1 0 0 1 ");
1916 } else {
1917 pdf_putnumber(s, cos_a);
1918 pdf_puts(s, " ");
1919 pdf_putnumber(s, sin_a);
1920 pdf_puts(s, " ");
1921 pdf_putnumber(s, -sin_a);
1922 pdf_puts(s, " ");
1923 pdf_putnumber(s, cos_a);
1924 pdf_puts(s, " ");
1925 }
1926 pdf_putnumber(s, x);
1927 pdf_puts(s, " ");
1928 pdf_putnumber(s, y);
1929 pdf_puts(s, " Tm\n");
1930 pdf_puts(s, "(");
1931 for (p = (const unsigned char*)node->text; *p; p++) {
1932 switch (*p) {
1933 case '(':
1934 case ')':
1935 case '\\':
1936 case '\n':
1937 case '\r':
1938 case '\t':
1939 pdf_puts(s, "\\");
1940 /* fall-through */
1941 default:
1942 if (*p >= 126) {
1943 snprintf(tmp, sizeof(tmp), "\\%03o", *p);
1944 pdf_puts(s, tmp);
1945 } else {
1946 pdf_put(s, (const char*)p, 1);
1947 }
1948 }
1949 }
1950 pdf_puts(s, ") Tj\n");
1951 if (!next_is_text)
1952 pdf_puts(s, "ET\n");
1953 }
1955 static void pdf_write_content(pdf_state *state)
1956 {
1957 gfx_node_t *node;
1958 int last_was_text = 0, next_is_text;
1959 for (node = state->canvas->firstnode; node; node = node->next) {
1960 switch (node->type) {
1961 case GFX_LINE:
1962 case GFX_AREA:
1963 pdf_write_linearea(state, node);
1964 break;
1965 case GFX_TEXT:
1966 next_is_text = node->next && node->next->type == GFX_TEXT;
1967 pdf_write_text(state, node, last_was_text, next_is_text);
1968 break;
1969 }
1970 last_was_text = node->type == GFX_TEXT;
1971 }
1972 }
1974 static void pdf_init_document(pdf_state *state)
1975 {
1976 pdf_init_buffer(state, &state->pdf_header);
1977 pdf_init_dict(state, &state->catalog_obj);
1978 pdf_init_dict(state, &state->pages_obj);
1979 pdf_init_dict(state, &state->page1_obj);
1980 pdf_init_dict(state, &state->fontsdict_obj);
1981 pdf_create_fonts(state);
1982 if (state->has_failed)
1983 return;
1984 /* make stream last object in file */
1985 pdf_init_object(state, &state->graph_stream);
1986 state->graph_stream.is_stream = 1;
1987 }
1989 static void pdf_setup_document(pdf_state *state)
1990 {
1991 /* all objects created by now, so init code can reference them */
1992 /* HEADER */
1993 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
1994 /* following 8 bit comment is recommended by Adobe for
1995 indicating binary file to file transfer applications */
1996 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
1997 /* CATALOG */
1998 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
1999 pdf_putsi(&state->catalog_obj, "/Pages ");
2000 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2001 pdf_puts(&state->catalog_obj, " 0 R\n");
2002 /* PAGES */
2003 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2004 pdf_putsi(&state->pages_obj, "/Kids [");
2005 pdf_putint(&state->pages_obj, state->page1_obj.id);
2006 pdf_puts(&state->pages_obj, " 0 R]\n");
2007 pdf_putsi(&state->pages_obj, "/Count 1\n");
2008 /* PAGE 1 */
2009 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2010 pdf_putsi(&state->page1_obj, "/Parent ");
2011 pdf_putint(&state->page1_obj, state->pages_obj.id);
2012 pdf_puts(&state->page1_obj, " 0 R\n");
2013 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2014 pdf_putint(&state->page1_obj, state->page_width);
2015 pdf_puts(&state->page1_obj, " ");
2016 pdf_putint(&state->page1_obj, state->page_height);
2017 pdf_puts(&state->page1_obj, "]\n");
2018 pdf_putsi(&state->page1_obj, "/Contents ");
2019 pdf_putint(&state->page1_obj, state->graph_stream.id);
2020 pdf_puts(&state->page1_obj, " 0 R\n");
2021 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2022 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2023 pdf_puts(&state->page1_obj, " 0 R >>\n");
2024 }
2026 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2027 {
2028 fputs(text, state->fp);
2029 state->pdf_file_pos += strlen(text);
2030 }
2032 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2033 {
2034 char tmp[40];
2035 buf->pdf_file_pos = state->pdf_file_pos;
2036 if (buf->is_obj) {
2037 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2038 pdf_write_string_to_file(state, tmp);
2039 }
2040 if (buf->is_dict)
2041 pdf_write_string_to_file(state, "<<\n");
2042 if (buf->is_stream) {
2043 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2044 pdf_write_string_to_file(state, tmp);
2045 pdf_write_string_to_file(state, "stream\n");
2046 }
2047 fwrite(buf->data, 1, buf->current_size, state->fp);
2048 state->pdf_file_pos += buf->current_size;
2049 if (buf->is_stream)
2050 pdf_write_string_to_file(state, "endstream\n");
2051 if (buf->is_dict)
2052 pdf_write_string_to_file(state, ">>\n");
2053 if (buf->is_obj)
2054 pdf_write_string_to_file(state, "endobj\n");
2055 }
2057 static void pdf_write_to_file(pdf_state *state)
2058 {
2059 pdf_buffer *buf = state->first_buffer;
2060 int xref_pos;
2061 state->pdf_file_pos = 0;
2062 pdf_write_buf_to_file(state, &state->pdf_header);
2063 while (buf) {
2064 if (buf->is_obj)
2065 pdf_write_buf_to_file(state, buf);
2066 buf = buf->next_buffer;
2067 }
2068 xref_pos = state->pdf_file_pos;
2069 fprintf(state->fp, "xref\n");
2070 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2071 /* TOC lines must be exactly 20 bytes including \n */
2072 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2073 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2074 if (buf->is_obj)
2075 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2076 }
2077 fprintf(state->fp, "trailer\n");
2078 fprintf(state->fp, "<<\n");
2079 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2080 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2081 fprintf(state->fp, ">>\n");
2082 fprintf(state->fp, "startxref\n");
2083 fprintf(state->fp, "%d\n", xref_pos);
2084 fputs("%%EOF\n", state->fp);
2085 }
2087 static void pdf_free_resources(pdf_state *state)
2088 {
2089 pdf_buffer *buf = state->first_buffer;
2090 while (buf) {
2091 free(buf->data);
2092 buf->data = NULL;
2093 buf->alloc_size = buf->current_size = 0;
2094 buf = buf->next_buffer;
2095 }
2096 while (state->font_list) {
2097 pdf_font *next = state->font_list->next;
2098 free(state->font_list);
2099 state->font_list = next;
2100 }
2101 }
2103 int gfx_render_pdf (gfx_canvas_t *canvas,
2104 art_u32 width, art_u32 height,
2105 gfx_color_t background, FILE *fp){
2106 struct pdf_state state;
2107 memset(&state, 0, sizeof(pdf_state));
2108 state.fp = fp;
2109 state.canvas = canvas;
2110 state.page_width = width;
2111 state.page_height = height;
2112 state.font_id = -1;
2113 state.font_size = -1;
2114 state.font_list = NULL;
2115 state.linecap = -1;
2116 state.linejoin = -1;
2117 pdf_init_document(&state);
2118 /*
2119 pdf_set_color(&state, background);
2120 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2121 height, width, height, width);
2122 */
2123 if (!state.has_failed)
2124 pdf_write_content(&state);
2125 if (!state.has_failed)
2126 pdf_setup_document(&state);
2127 if (!state.has_failed)
2128 pdf_write_to_file(&state);
2129 pdf_free_resources(&state);
2130 return state.has_failed ? -1 : 0;
2131 }