1 /****************************************************************************
2 * RRDtool 1.2.0 Copyright by Tobi Oetiker, 1997-2005
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, double tabwidth);
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->filename = NULL; /* font or image filename */
66 node->text = NULL;
67 node->x = 0.0;
68 node->y = 0.0; /* position */
69 node->angle = 0;
70 node->halign = GFX_H_NULL; /* text alignement */
71 node->valign = GFX_V_NULL; /* text alignement */
72 node->tabwidth = 0.0;
73 node->next = NULL;
74 if (canvas->lastnode != NULL){
75 canvas->lastnode->next = node;
76 }
77 if (canvas->firstnode == NULL){
78 canvas->firstnode = node;
79 }
80 canvas->lastnode = node;
81 return node;
82 }
84 gfx_canvas_t *gfx_new_canvas (void) {
85 gfx_canvas_t *canvas = art_new(gfx_canvas_t,1);
86 canvas->firstnode = NULL;
87 canvas->lastnode = NULL;
88 canvas->imgformat = IF_PNG; /* we default to PNG output */
89 canvas->interlaced = 0;
90 canvas->zoom = 1.0;
91 return canvas;
92 }
94 /* create a new line */
95 gfx_node_t *gfx_new_line(gfx_canvas_t *canvas,
96 double X0, double Y0,
97 double X1, double Y1,
98 double width, gfx_color_t color){
99 return gfx_new_dashed_line(canvas, X0, Y0, X1, Y1, width, color, 0, 0);
100 }
102 gfx_node_t *gfx_new_dashed_line(gfx_canvas_t *canvas,
103 double X0, double Y0,
104 double X1, double Y1,
105 double width, gfx_color_t color,
106 double dash_on, double dash_off){
108 gfx_node_t *node;
109 ArtVpath *vec;
110 node = gfx_new_node(canvas,GFX_LINE);
111 if (node == NULL) return NULL;
112 vec = art_new(ArtVpath, 3);
113 if (vec == NULL) return NULL;
114 vec[0].code = ART_MOVETO_OPEN; vec[0].x=X0+LINEOFFSET; vec[0].y=Y0+LINEOFFSET;
115 vec[1].code = ART_LINETO; vec[1].x=X1+LINEOFFSET; vec[1].y=Y1+LINEOFFSET;
116 vec[2].code = ART_END; vec[2].x=0;vec[2].y=0;
118 node->points = 3;
119 node->points_max = 3;
120 node->color = color;
121 node->size = width;
122 node->dash_on = dash_on;
123 node->dash_off = dash_off;
124 node->path = vec;
125 return node;
126 }
128 /* create a new area */
129 gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,
130 double X0, double Y0,
131 double X1, double Y1,
132 double X2, double Y2,
133 gfx_color_t color) {
135 gfx_node_t *node;
136 ArtVpath *vec;
137 node = gfx_new_node(canvas,GFX_AREA);
138 if (node == NULL) return NULL;
139 vec = art_new(ArtVpath, 5);
140 if (vec == NULL) return NULL;
141 vec[0].code = ART_MOVETO; vec[0].x=X0; vec[0].y=Y0;
142 vec[1].code = ART_LINETO; vec[1].x=X1; vec[1].y=Y1;
143 vec[2].code = ART_LINETO; vec[2].x=X2; vec[2].y=Y2;
144 vec[3].code = ART_LINETO; vec[3].x=X0; vec[3].y=Y0;
145 vec[4].code = ART_END; vec[4].x=0; vec[4].y=0;
147 node->points = 5;
148 node->points_max = 5;
149 node->color = color;
150 node->path = vec;
152 return node;
153 }
155 /* add a point to a line or to an area */
156 int gfx_add_point (gfx_node_t *node,
157 double x, double y){
158 if (node == NULL) return 1;
159 if (node->type == GFX_AREA) {
160 double X0 = node->path[0].x;
161 double Y0 = node->path[0].y;
162 node->points -= 2;
163 art_vpath_add_point (&(node->path),
164 &(node->points),
165 &(node->points_max),
166 ART_LINETO,
167 x,y);
168 art_vpath_add_point (&(node->path),
169 &(node->points),
170 &(node->points_max),
171 ART_LINETO,
172 X0,Y0);
173 art_vpath_add_point (&(node->path),
174 &(node->points),
175 &(node->points_max),
176 ART_END,
177 0,0);
178 } else if (node->type == GFX_LINE) {
179 node->points -= 1;
180 art_vpath_add_point (&(node->path),
181 &(node->points),
182 &(node->points_max),
183 ART_LINETO,
184 x+LINEOFFSET,y+LINEOFFSET);
185 art_vpath_add_point (&(node->path),
186 &(node->points),
187 &(node->points_max),
188 ART_END,
189 0,0);
191 } else {
192 /* can only add point to areas and lines */
193 return 1;
194 }
195 return 0;
196 }
198 void gfx_close_path (gfx_node_t *node) {
199 node->closed_path = 1;
200 if (node->path[0].code == ART_MOVETO_OPEN)
201 node->path[0].code = ART_MOVETO;
202 }
204 /* create a text node */
205 gfx_node_t *gfx_new_text (gfx_canvas_t *canvas,
206 double x, double y, gfx_color_t color,
207 char* font, double size,
208 double tabwidth, double angle,
209 enum gfx_h_align_en h_align,
210 enum gfx_v_align_en v_align,
211 char* text){
212 gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT);
214 node->text = strdup(text);
215 node->size = size;
216 node->filename = strdup(font);
217 node->x = x;
218 node->y = y;
219 node->angle = angle;
220 node->color = color;
221 node->tabwidth = tabwidth;
222 node->halign = h_align;
223 node->valign = v_align;
224 #if 0
225 /* debugging: show text anchor
226 green is along x-axis, red is downward y-axis */
227 if (1) {
228 double a = 2 * M_PI * -node->angle / 360.0;
229 double cos_a = cos(a);
230 double sin_a = sin(a);
231 double len = 3;
232 gfx_new_line(canvas,
233 x, y,
234 x + len * cos_a, y - len * sin_a,
235 0.2, 0x00FF0000);
236 gfx_new_line(canvas,
237 x, y,
238 x + len * sin_a, y + len * cos_a,
239 0.2, 0xFF000000);
240 }
241 #endif
242 return node;
243 }
245 int gfx_render(gfx_canvas_t *canvas,
246 art_u32 width, art_u32 height,
247 gfx_color_t background, FILE *fp){
248 switch (canvas->imgformat) {
249 case IF_PNG:
250 return gfx_render_png (canvas, width, height, background, fp);
251 case IF_SVG:
252 return gfx_render_svg (canvas, width, height, background, fp);
253 case IF_EPS:
254 return gfx_render_eps (canvas, width, height, background, fp);
255 case IF_PDF:
256 return gfx_render_pdf (canvas, width, height, background, fp);
257 default:
258 return -1;
259 }
260 }
262 static void gfx_string_destroy ( gfx_string string ) {
263 unsigned int n;
264 if (string->glyphs) {
265 for (n=0; n<string->num_glyphs; ++n)
266 FT_Done_Glyph (string->glyphs[n].image);
267 free (string->glyphs);
268 }
269 free (string);
270 }
273 double gfx_get_text_width ( gfx_canvas_t *canvas,
274 double start, char* font, double size,
275 double tabwidth, char* text, int rotation){
276 switch (canvas->imgformat) {
277 case IF_PNG:
278 return gfx_get_text_width_libart (start, font, size, tabwidth, text, rotation);
279 case IF_SVG: /* fall through */
280 case IF_EPS:
281 case IF_PDF:
282 return afm_get_text_width(start, font, size, tabwidth, text);
283 default:
284 return size * strlen(text);
285 }
286 }
288 double gfx_get_text_width_libart (
289 double start, char* font, double size,
290 double tabwidth, char* text, int rotation){
292 int error;
293 double text_width=0;
294 FT_Face face;
295 FT_Library library=NULL;
296 gfx_string string;
298 FT_Init_FreeType( &library );
299 error = FT_New_Face( library, font, 0, &face );
300 if ( error ) return -1;
301 error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
302 if ( error ) return -1;
304 string = gfx_string_create( face, text, rotation,tabwidth);
305 text_width = string->width;
306 gfx_string_destroy(string);
307 FT_Done_FreeType(library);
308 return text_width/64;
309 }
311 static void gfx_libart_close_path(gfx_node_t *node, ArtVpath **vec)
312 {
313 /* libart must have end==start for closed paths,
314 even if using ART_MOVETO and not ART_MOVETO_OPEN
315 so add extra point which is the same as the starting point */
316 int points_max = node->points; /* scaled array has exact size */
317 int points = node->points - 1;
318 art_vpath_add_point (vec, &points, &points_max, ART_LINETO,
319 (**vec).x, (**vec).y);
320 art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
321 }
324 /* find bbox of a string */
325 static void compute_string_bbox(gfx_string string) {
326 unsigned int n;
327 FT_BBox bbox;
329 bbox.xMin = bbox.yMin = 32000;
330 bbox.xMax = bbox.yMax = -32000;
331 for ( n = 0; n < string->num_glyphs; n++ ) {
332 FT_BBox glyph_bbox;
333 FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
334 &glyph_bbox );
335 if (glyph_bbox.xMin < bbox.xMin) {
336 bbox.xMin = glyph_bbox.xMin;
337 }
338 if (glyph_bbox.yMin < bbox.yMin) {
339 bbox.yMin = glyph_bbox.yMin;
340 }
341 if (glyph_bbox.xMax > bbox.xMax) {
342 bbox.xMax = glyph_bbox.xMax;
343 }
344 if (glyph_bbox.yMax > bbox.yMax) {
345 bbox.yMax = glyph_bbox.yMax;
346 }
347 }
348 if ( bbox.xMin > bbox.xMax ) {
349 bbox.xMin = 0;
350 bbox.yMin = 0;
351 bbox.xMax = 0;
352 bbox.yMax = 0;
353 }
354 string->bbox.xMin = bbox.xMin;
355 string->bbox.xMax = bbox.xMax;
356 string->bbox.yMin = bbox.yMin;
357 string->bbox.yMax = bbox.yMax;
358 }
360 /* create a free type glyph string */
361 gfx_string gfx_string_create(FT_Face face,const char *text,
362 int rotation, double tabwidth)
363 {
365 FT_GlyphSlot slot = face->glyph; /* a small shortcut */
366 FT_Bool use_kerning;
367 FT_UInt previous;
368 FT_Vector ft_pen;
370 gfx_string string;
371 gfx_char glyph; /* current glyph in table */
372 unsigned int n;
373 int error;
374 int gottab = 0;
376 ft_pen.x = 0; /* start at (0,0) !! */
377 ft_pen.y = 0;
379 string = (gfx_string) malloc (sizeof(struct gfx_string_s));
380 string->width = 0;
381 string->height = 0;
382 string->count = strlen (text);
383 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
384 string->num_glyphs = 0;
385 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
386 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
387 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
388 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
390 use_kerning = FT_HAS_KERNING(face);
391 previous = 0;
392 glyph = string->glyphs;
393 for (n=0; n<string->count; n++, glyph++) {
394 FT_Vector vec;
395 /* handle the tabs ...
396 have a witespace glyph inserted, but set its width such that the distance
397 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
398 unsigned char letter = text[n];
399 gottab = 0;
400 if (letter == '\\' && n+1 < string->count && text[n+1] == 't'){
401 /* we have a tab here so skip the backslash and
402 set t to ' ' so that we get a white space */
403 gottab = 1;
404 n++;
405 letter = ' ';
406 }
407 if (letter == '\t'){
408 letter = ' ';
409 gottab = 1 ;
410 }
411 /* initialize each struct gfx_char_s */
412 glyph->index = 0;
413 glyph->pos.x = 0;
414 glyph->pos.y = 0;
415 glyph->image = NULL;
417 glyph->index = FT_Get_Char_Index( face, letter );
419 /* compute glyph origin */
420 if ( use_kerning && previous && glyph->index ) {
421 FT_Vector kerning;
422 FT_Get_Kerning (face, previous, glyph->index,
423 ft_kerning_default, &kerning);
424 ft_pen.x += kerning.x;
425 ft_pen.y += kerning.y;
426 }
428 /* load the glyph image (in its native format) */
429 /* for now, we take a monochrome glyph bitmap */
430 error = FT_Load_Glyph (face, glyph->index, FT_LOAD_DEFAULT);
431 if (error) {
432 fprintf (stderr, "couldn't load glyph: %c\n", letter);
433 continue;
434 }
435 error = FT_Get_Glyph (slot, &glyph->image);
436 if (error) {
437 fprintf (stderr, "couldn't get glyph from slot: %c\n", letter);
438 continue;
439 }
440 /* if we are in tabbing mode, we replace the tab with a space and shift the position
441 of the space so that its left edge is where the tab was supposed to land us */
442 if (gottab){
443 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
444 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
445 }
446 /* store current pen position */
447 glyph->pos.x = ft_pen.x;
448 glyph->pos.y = ft_pen.y;
451 ft_pen.x += slot->advance.x;
452 ft_pen.y += slot->advance.y;
454 /* rotate glyph */
455 vec = glyph->pos;
456 FT_Vector_Transform (&vec, &string->transform);
457 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
458 if (error) {
459 fprintf (stderr, "couldn't transform glyph\n");
460 continue;
461 }
463 /* convert to a bitmap - destroy native image */
464 error = FT_Glyph_To_Bitmap (&glyph->image, FT_RENDER_MODE_NORMAL, 0, 1);
465 if (error) {
466 fprintf (stderr, "couldn't convert glyph to bitmap\n");
467 continue;
468 }
470 /* increment number of glyphs */
471 previous = glyph->index;
472 string->num_glyphs++;
473 }
474 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
475 compute_string_bbox( string );
476 /* the last character was a tab */
477 if (gottab) {
478 string->width = ft_pen.x;
479 } else {
480 string->width = string->bbox.xMax - string->bbox.xMin;
481 }
482 string->height = string->bbox.yMax - string->bbox.yMin;
483 return string;
484 }
487 static int gfx_save_png (art_u8 *buffer, FILE *fp,
488 long width, long height, long bytes_per_pixel);
489 /* render grafics into png image */
491 int gfx_render_png (gfx_canvas_t *canvas,
492 art_u32 width, art_u32 height,
493 gfx_color_t background, FILE *fp){
496 FT_Library library;
497 gfx_node_t *node = canvas->firstnode;
498 /*
499 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
500 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
501 */
502 unsigned long pys_width = width * canvas->zoom;
503 unsigned long pys_height = height * canvas->zoom;
504 const int bytes_per_pixel = 4;
505 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
506 art_u8 *buffer = art_new (art_u8, rowstride*pys_height);
507 /* fill that buffer with out background color */
508 gfx_color_t *buffp;
509 long i;
510 for (i=0,buffp=(gfx_color_t *)buffer;
511 i<pys_width*pys_height;
512 i++){
513 *(buffp++)=background;
514 }
515 FT_Init_FreeType( &library );
516 while(node){
517 switch (node->type) {
518 case GFX_LINE:
519 case GFX_AREA: {
520 ArtVpath *vec,*pvec;
521 double dst[6];
522 ArtSVP *svp,*svpt;
523 art_affine_scale(dst,canvas->zoom,canvas->zoom);
524 vec = art_vpath_affine_transform(node->path,dst);
525 if (node->closed_path)
526 gfx_libart_close_path(node, &vec);
527 /* gfx_round_scaled_coordinates(vec); */
528 pvec = art_vpath_perturb(vec);
529 art_free(vec);
530 if(node->type == GFX_LINE){
531 svp = art_svp_vpath_stroke ( pvec, ART_PATH_STROKE_JOIN_ROUND,
532 ART_PATH_STROKE_CAP_ROUND,
533 node->size*canvas->zoom,4,0.25);
534 } else {
535 svp = art_svp_from_vpath ( pvec );
536 svpt = art_svp_uncross( svp );
537 art_svp_free(svp);
538 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
539 art_svp_free(svpt);
540 }
541 art_free(pvec);
542 /* this is from gnome since libart does not have this yet */
543 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
544 node->color, buffer, rowstride, NULL);
545 art_svp_free(svp);
546 break;
547 }
548 case GFX_TEXT: {
549 unsigned int n;
550 int error;
551 art_u8 fcolor[4],falpha;
552 FT_Face face;
553 gfx_char glyph;
554 gfx_string string;
555 FT_Vector vec; /* 26.6 */
557 float pen_x = 0.0 , pen_y = 0.0;
558 /* double x,y; */
559 long ix,iy;
561 fcolor[0] = node->color >> 24;
562 fcolor[1] = (node->color >> 16) & 0xff;
563 fcolor[2] = (node->color >> 8) & 0xff;
564 falpha = node->color & 0xff;
565 error = FT_New_Face( library,
566 (char *)node->filename,
567 0,
568 &face );
569 if ( error ) {
570 rrd_set_error("failed to load %s",node->filename);
571 break;
572 }
573 error = FT_Set_Char_Size(face, /* handle to face object */
574 (long)(node->size*64),
575 (long)(node->size*64),
576 (long)(100*canvas->zoom),
577 (long)(100*canvas->zoom));
578 if ( error ) break;
579 pen_x = node->x * canvas->zoom;
580 pen_y = node->y * canvas->zoom;
582 string = gfx_string_create (face, node->text, node->angle, node->tabwidth);
583 switch(node->halign){
584 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
585 break;
586 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
587 -string->bbox.xMax/2:-string->bbox.xMin/2;
588 break;
589 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
590 break;
591 case GFX_H_NULL: vec.x = 0;
592 break;
593 }
595 switch(node->valign){
596 case GFX_V_TOP: vec.y = string->bbox.yMax;
597 break;
598 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
599 string->bbox.yMax/2:string->bbox.yMin/2;
600 break;
601 case GFX_V_BOTTOM: vec.y = 0;
602 break;
603 case GFX_V_NULL: vec.y = 0;
604 break;
605 }
606 pen_x += vec.x/64;
607 pen_y += vec.y/64;
608 glyph = string->glyphs;
609 for(n=0; n<string->num_glyphs; ++n, ++glyph) {
610 int gr;
611 FT_Glyph image;
612 FT_BitmapGlyph bit;
613 /* long buf_x,comp_n; */
614 /* make copy to transform */
615 if (! glyph->image) {
616 fprintf (stderr, "no image\n");
617 continue;
618 }
619 error = FT_Glyph_Copy (glyph->image, &image);
620 if (error) {
621 fprintf (stderr, "couldn't copy image\n");
622 continue;
623 }
625 /* transform it */
626 vec = glyph->pos;
627 FT_Vector_Transform (&vec, &string->transform);
629 bit = (FT_BitmapGlyph) image;
630 gr = bit->bitmap.num_grays -1;
631 /*
632 buf_x = (pen_x + 0.5) + (double)bit->left;
633 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
634 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
635 buf_x *= bytes_per_pixel ;
636 for (iy=0; iy < bit->bitmap.rows; iy++){
637 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
638 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
639 buf_y *= rowstride;
640 for (ix=0;ix < bit->bitmap.width;ix++){
641 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
642 }
643 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
644 }
645 art_free(letter);
646 */
648 for (iy=0; iy < bit->bitmap.rows; iy++){
649 long buf_y = iy+(pen_y+0.5)-bit->top;
650 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
651 buf_y *= rowstride;
652 for (ix=0;ix < bit->bitmap.width;ix++){
653 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
654 art_u8 font_alpha;
656 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
657 buf_x *= bytes_per_pixel ;
658 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
659 if (font_alpha > 0){
660 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
661 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
662 }
663 }
664 }
666 /*
667 for (iy=0; iy < bit->bitmap.rows; iy++){
668 long buf_y = iy+(pen_y+0.5)-bit->top;
669 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
670 buf_y *= rowstride;
671 for (ix=0;ix < bit->bitmap.width;ix++){
672 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
673 art_u8 font_alpha;
675 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
676 buf_x *= bytes_per_pixel ;
677 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
678 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
679 for (iz = 0; iz < 3; iz++){
680 art_u8 *orig = buffer + buf_y + buf_x + iz;
681 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
682 (double)fcolor[iz] / gr * (font_alpha));
683 }
684 }
685 }
686 */
687 FT_Done_Glyph (image);
688 }
689 gfx_string_destroy(string);
690 }
691 }
692 node = node->next;
693 }
694 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
695 art_free(buffer);
696 FT_Done_FreeType( library );
697 return 0;
698 }
700 /* free memory used by nodes this will also remove memory required for
701 associated paths and svcs ... but not for text strings */
702 int
703 gfx_destroy (gfx_canvas_t *canvas){
704 gfx_node_t *next,*node = canvas->firstnode;
705 while(node){
706 next = node->next;
707 art_free(node->path);
708 free(node->text);
709 free(node->filename);
710 art_free(node);
711 node = next;
712 }
713 art_free(canvas);
714 return 0;
715 }
717 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
718 png_structp png_ptr = NULL;
719 png_infop info_ptr = NULL;
720 int i;
721 png_bytep *row_pointers;
722 int rowstride = width * bytes_per_pixel;
723 png_text text[2];
725 if (fp == NULL)
726 return (1);
728 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
729 if (png_ptr == NULL)
730 {
731 return (1);
732 }
733 row_pointers = (png_bytepp)png_malloc(png_ptr,
734 height*sizeof(png_bytep));
736 info_ptr = png_create_info_struct(png_ptr);
738 if (info_ptr == NULL)
739 {
740 png_free(png_ptr,row_pointers);
741 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
742 return (1);
743 }
745 if (setjmp(png_jmpbuf(png_ptr)))
746 {
747 /* If we get here, we had a problem writing the file */
748 png_destroy_write_struct(&png_ptr, &info_ptr);
749 return (1);
750 }
752 png_init_io(png_ptr, fp);
753 png_set_IHDR (png_ptr, info_ptr,width, height,
754 8, PNG_COLOR_TYPE_RGB_ALPHA,
755 PNG_INTERLACE_NONE,
756 PNG_COMPRESSION_TYPE_DEFAULT,
757 PNG_FILTER_TYPE_DEFAULT);
759 text[0].key = "Software";
760 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
761 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
762 png_set_text (png_ptr, info_ptr, text, 1);
764 /* lets make this fast */
765 /* png_set_filter(png_ptr,0,PNG_FILTER_NONE); */
766 png_set_compression_level(png_ptr,1);
767 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
768 /*
769 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
770 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
771 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
773 /* Write header data */
774 png_write_info (png_ptr, info_ptr);
775 for (i = 0; i < height; i++)
776 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
778 png_write_image(png_ptr, row_pointers);
779 png_write_end(png_ptr, info_ptr);
780 png_free(png_ptr,row_pointers);
781 png_destroy_write_struct(&png_ptr, &info_ptr);
782 return 1;
783 }
786 /* ------- SVG -------
787 SVG reference:
788 http://www.w3.org/TR/SVG/
789 */
790 static int svg_indent = 0;
791 static int svg_single_line = 0;
792 static const char *svg_default_font = "Helvetica";
793 typedef struct svg_dash
794 {
795 int dash_enable;
796 double dash_adjust, dash_len, dash_offset;
797 double adjusted_on, adjusted_off;
798 } svg_dash;
801 static void svg_print_indent(FILE *fp)
802 {
803 int i;
804 for (i = svg_indent - svg_single_line; i > 0; i--) {
805 putc(' ', fp);
806 putc(' ', fp);
807 }
808 }
810 static void svg_start_tag(FILE *fp, const char *name)
811 {
812 svg_print_indent(fp);
813 putc('<', fp);
814 fputs(name, fp);
815 svg_indent++;
816 }
818 static void svg_close_tag_single_line(FILE *fp)
819 {
820 svg_single_line++;
821 putc('>', fp);
822 }
824 static void svg_close_tag(FILE *fp)
825 {
826 putc('>', fp);
827 if (!svg_single_line)
828 putc('\n', fp);
829 }
831 static void svg_end_tag(FILE *fp, const char *name)
832 {
833 /* name is NULL if closing empty-node tag */
834 svg_indent--;
835 if (svg_single_line)
836 svg_single_line--;
837 else if (name)
838 svg_print_indent(fp);
839 if (name != NULL) {
840 fputs("</", fp);
841 fputs(name, fp);
842 } else {
843 putc('/', fp);
844 }
845 svg_close_tag(fp);
846 }
848 static void svg_close_tag_empty_node(FILE *fp)
849 {
850 svg_end_tag(fp, NULL);
851 }
853 static void svg_write_text(FILE *fp, const char *text)
854 {
855 const unsigned char *p, *start, *last;
856 unsigned int ch;
857 p = (const unsigned char*)text;
858 if (!p)
859 return;
860 /* trim leading spaces */
861 while (*p == ' ')
862 p++;
863 start = p;
864 /* trim trailing spaces */
865 last = p - 1;
866 while ((ch = *p) != 0) {
867 if (ch != ' ')
868 last = p;
869 p++;
870 }
871 /* encode trimmed text */
872 p = start;
873 while (p <= last) {
874 ch = *p++;
875 ch = afm_host2unicode(ch); /* unsafe macro */
876 switch (ch) {
877 case '&': fputs("&", fp); break;
878 case '<': fputs("<", fp); break;
879 case '>': fputs(">", fp); break;
880 case '"': fputs(""", fp); break;
881 default:
882 if (ch >= 127)
883 fprintf(fp, "&#%d;", ch);
884 else
885 putc(ch, fp);
886 }
887 }
888 }
890 static void svg_format_number(char *buf, int bufsize, double d)
891 {
892 /* omit decimals if integer to reduce filesize */
893 char *p;
894 snprintf(buf, bufsize, "%.2f", d);
895 p = buf; /* doesn't trust snprintf return value */
896 while (*p)
897 p++;
898 while (--p > buf) {
899 char ch = *p;
900 if (ch == '0') {
901 *p = '\0'; /* zap trailing zeros */
902 continue;
903 }
904 if (ch == '.')
905 *p = '\0'; /* zap trailing dot */
906 break;
907 }
908 }
910 static void svg_write_number(FILE *fp, double d)
911 {
912 char buf[60];
913 svg_format_number(buf, sizeof(buf), d);
914 fputs(buf, fp);
915 }
917 static int svg_color_is_black(int c)
918 {
919 /* gfx_color_t is RRGGBBAA */
920 return c == 0x000000FF;
921 }
923 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
924 {
925 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
926 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
927 gfx_color_t opacity = c & 0xFF;
928 fprintf(fp, " %s=\"", attr);
929 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
930 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
931 fprintf(fp, "#%03lX",
932 ( ((rrggbb >> 8) & 0xF00)
933 | ((rrggbb >> 4) & 0x0F0)
934 | ( rrggbb & 0x00F)));
935 } else {
936 fprintf(fp, "#%06lX", rrggbb);
937 }
938 fputs("\"", fp);
939 if (opacity != 0xFF) {
940 fprintf(fp, " stroke-opacity=\"");
941 svg_write_number(fp, opacity / 255.0);
942 fputs("\"", fp);
943 }
944 }
946 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
947 {
948 double offset;
949 int mult;
950 if (node->dash_on <= 0 || node->dash_off <= 0) {
951 d->dash_enable = 0;
952 return;
953 }
954 d->dash_enable = 1;
955 d->dash_len = node->dash_on + node->dash_off;
956 /* dash on/off adjustment due to round caps */
957 d->dash_adjust = 0.8 * node->size;
958 d->adjusted_on = node->dash_on - d->dash_adjust;
959 if (d->adjusted_on < 0.01)
960 d->adjusted_on = 0.01;
961 d->adjusted_off = d->dash_len - d->adjusted_on;
962 /* dash offset calc */
963 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
964 offset = node->path[0].y;
965 else
966 offset = node->path[0].x;
967 mult = (int)fabs(offset / d->dash_len);
968 d->dash_offset = offset - mult * d->dash_len;
969 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
970 d->dash_offset = d->dash_len - d->dash_offset;
971 }
973 static int svg_dash_equal(svg_dash *a, svg_dash *b)
974 {
975 if (a->dash_enable != b->dash_enable)
976 return 0;
977 if (a->adjusted_on != b->adjusted_on)
978 return 0;
979 if (a->adjusted_off != b->adjusted_off)
980 return 0;
981 /* rest of properties will be the same when on+off are */
982 return 1;
983 }
985 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
986 {
987 svg_dash dash_info;
988 svg_get_dash(node, &dash_info);
989 fputs(" stroke-width=\"", fp);
990 svg_write_number(fp, node->size);
991 fputs("\"", fp);
992 svg_write_color(fp, node->color, "stroke");
993 fputs(" fill=\"none\"", fp);
994 if (dash_info.dash_enable) {
995 if (dash_info.dash_offset != 0) {
996 fputs(" stroke-dashoffset=\"", fp);
997 svg_write_number(fp, dash_info.dash_offset);
998 fputs("\"", fp);
999 }
1000 fputs(" stroke-dasharray=\"", fp);
1001 svg_write_number(fp, dash_info.adjusted_on);
1002 fputs(",", fp);
1003 svg_write_number(fp, dash_info.adjusted_off);
1004 fputs("\"", fp);
1005 }
1006 }
1008 static int svg_is_int_step(double a, double b)
1009 {
1010 double diff = fabs(a - b);
1011 return floor(diff) == diff;
1012 }
1014 static int svg_path_straight_segment(FILE *fp,
1015 double lastA, double currentA, double currentB,
1016 gfx_node_t *node,
1017 int segment_idx, int isx, char absChar, char relChar)
1018 {
1019 if (!svg_is_int_step(lastA, currentA)) {
1020 putc(absChar, fp);
1021 svg_write_number(fp, currentA);
1022 return 0;
1023 }
1024 if (segment_idx < node->points - 1) {
1025 ArtVpath *vec = node->path + segment_idx + 1;
1026 if (vec->code == ART_LINETO) {
1027 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1028 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1029 if (nextB == currentB
1030 && ((currentA >= lastA) == (nextA >= currentA))
1031 && svg_is_int_step(currentA, nextA)) {
1032 return 1; /* skip to next as it is a straight line */
1033 }
1034 }
1035 }
1036 putc(relChar, fp);
1037 svg_write_number(fp, currentA - lastA);
1038 return 0;
1039 }
1041 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1042 {
1043 int i;
1044 double lastX = 0, lastY = 0;
1045 /* for straight lines <path..> tags take less space than
1046 <line..> tags because of the efficient packing
1047 in the 'd' attribute */
1048 svg_start_tag(fp, "path");
1049 if (!multi)
1050 svg_common_path_attributes(fp, node);
1051 fputs(" d=\"", fp);
1052 /* specification of the 'd' attribute: */
1053 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1054 for (i = 0; i < node->points; i++) {
1055 ArtVpath *vec = node->path + i;
1056 double x = vec->x - LINEOFFSET;
1057 double y = vec->y - LINEOFFSET;
1058 switch (vec->code) {
1059 case ART_MOVETO_OPEN: /* fall-through */
1060 case ART_MOVETO:
1061 putc('M', fp);
1062 svg_write_number(fp, x);
1063 putc(',', fp);
1064 svg_write_number(fp, y);
1065 break;
1066 case ART_LINETO:
1067 /* try optimize filesize by using minimal lineto commands */
1068 /* without introducing rounding errors. */
1069 if (x == lastX) {
1070 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1071 continue;
1072 } else if (y == lastY) {
1073 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1074 continue;
1075 } else {
1076 putc('L', fp);
1077 svg_write_number(fp, x);
1078 putc(',', fp);
1079 svg_write_number(fp, y);
1080 }
1081 break;
1082 case ART_CURVETO: break; /* unsupported */
1083 case ART_END: break; /* nop */
1084 }
1085 lastX = x;
1086 lastY = y;
1087 }
1088 if (node->closed_path)
1089 fputs(" Z", fp);
1090 fputs("\"", fp);
1091 svg_close_tag_empty_node(fp);
1092 }
1094 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1095 {
1096 /* optimize for multiple paths with the same color, penwidth, etc. */
1097 int num = 1;
1098 gfx_node_t *node = *nodeR;
1099 gfx_node_t *next = node->next;
1100 while (next) {
1101 if (next->type != node->type
1102 || next->size != node->size
1103 || next->color != node->color
1104 || next->dash_on != node->dash_on
1105 || next->dash_off != node->dash_off)
1106 break;
1107 next = next->next;
1108 num++;
1109 }
1110 if (num == 1) {
1111 svg_path(fp, node, 0);
1112 return;
1113 }
1114 svg_start_tag(fp, "g");
1115 svg_common_path_attributes(fp, node);
1116 svg_close_tag(fp);
1117 while (num && node) {
1118 svg_path(fp, node, 1);
1119 if (!--num)
1120 break;
1121 node = node->next;
1122 *nodeR = node;
1123 }
1124 svg_end_tag(fp, "g");
1125 }
1127 static void svg_area(FILE *fp, gfx_node_t *node)
1128 {
1129 int i;
1130 double startX = 0, startY = 0;
1131 svg_start_tag(fp, "polygon");
1132 fputs(" ", fp);
1133 svg_write_color(fp, node->color, "fill");
1134 fputs(" points=\"", fp);
1135 for (i = 0; i < node->points; i++) {
1136 ArtVpath *vec = node->path + i;
1137 double x = vec->x - LINEOFFSET;
1138 double y = vec->y - LINEOFFSET;
1139 switch (vec->code) {
1140 case ART_MOVETO_OPEN: /* fall-through */
1141 case ART_MOVETO:
1142 svg_write_number(fp, x);
1143 putc(',', fp);
1144 svg_write_number(fp, y);
1145 startX = x;
1146 startY = y;
1147 break;
1148 case ART_LINETO:
1149 if (i == node->points - 2
1150 && node->path[i + 1].code == ART_END
1151 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1152 break; /* poly area always closed, no need for last point */
1153 }
1154 putc(' ', fp);
1155 svg_write_number(fp, x);
1156 putc(',', fp);
1157 svg_write_number(fp, y);
1158 break;
1159 case ART_CURVETO: break; /* unsupported */
1160 case ART_END: break; /* nop */
1161 }
1162 }
1163 fputs("\"", fp);
1164 svg_close_tag_empty_node(fp);
1165 }
1167 static void svg_text(FILE *fp, gfx_node_t *node)
1168 {
1169 double x = node->x - LINEOFFSET;
1170 double y = node->y - LINEOFFSET;
1171 if (node->angle != 0) {
1172 svg_start_tag(fp, "g");
1173 fputs(" transform=\"translate(", fp);
1174 svg_write_number(fp, x);
1175 fputs(",", fp);
1176 svg_write_number(fp, y);
1177 fputs(") rotate(", fp);
1178 svg_write_number(fp, node->angle);
1179 fputs(")\"", fp);
1180 x = y = 0;
1181 svg_close_tag(fp);
1182 }
1183 switch (node->valign) {
1184 case GFX_V_TOP: y += node->size; break;
1185 case GFX_V_CENTER: y += node->size / 3; break;
1186 case GFX_V_BOTTOM: break;
1187 case GFX_V_NULL: break;
1188 }
1189 svg_start_tag(fp, "text");
1190 fputs(" x=\"", fp);
1191 svg_write_number(fp, x);
1192 fputs("\" y=\"", fp);
1193 svg_write_number(fp, y);
1195 /* if (strcmp(node->filename, svg_default_font))
1196 fprintf(fp, " font-family=\"%s\"", node->filename);
1197 */
1198 fputs("\" font-family=\"Helvetica", fp);
1199 fputs("\" font-size=\"", fp);
1200 svg_write_number(fp, node->size);
1201 fputs("\"", fp);
1202 if (!svg_color_is_black(node->color))
1203 svg_write_color(fp, node->color, "fill");
1204 switch (node->halign) {
1205 case GFX_H_RIGHT: fputs(" text-anchor=\"end\"", fp); break;
1206 case GFX_H_CENTER: fputs(" text-anchor=\"middle\"", fp); break;
1207 case GFX_H_LEFT: break;
1208 case GFX_H_NULL: break;
1209 }
1210 svg_close_tag_single_line(fp);
1211 /* support for node->tabwidth missing */
1212 svg_write_text(fp, node->text);
1213 svg_end_tag(fp, "text");
1214 if (node->angle != 0)
1215 svg_end_tag(fp, "g");
1216 }
1218 int gfx_render_svg (gfx_canvas_t *canvas,
1219 art_u32 width, art_u32 height,
1220 gfx_color_t background, FILE *fp){
1221 gfx_node_t *node = canvas->firstnode;
1222 fputs(
1223 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1224 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1225 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1226 "<!--\n"
1227 " SVG file created by RRDtool,\n"
1228 " Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch\n"
1229 "\n"
1230 " The width/height attributes in the outhermost svg node\n"
1231 " are just default sizes for the browser which is used\n"
1232 " if the svg file is openened directly without being\n"
1233 " embedded in an html file.\n"
1234 " The viewBox is the local coord system for rrdtool.\n"
1235 "-->\n", fp);
1236 svg_start_tag(fp, "svg");
1237 fputs(" width=\"", fp);
1238 svg_write_number(fp, width * canvas->zoom);
1239 fputs("\" height=\"", fp);
1240 svg_write_number(fp, height * canvas->zoom);
1241 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1242 svg_write_number(fp, -LINEOFFSET);
1243 fputs(" ", fp);
1244 svg_write_number(fp, -LINEOFFSET);
1245 fputs(" ", fp);
1246 svg_write_number(fp, width - LINEOFFSET);
1247 fputs(" ", fp);
1248 svg_write_number(fp, height - LINEOFFSET);
1249 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1250 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1251 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1252 svg_close_tag(fp);
1253 svg_start_tag(fp, "rect");
1254 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1255 svg_write_color(fp, background, "fill");
1256 svg_close_tag_empty_node(fp);
1257 while (node) {
1258 switch (node->type) {
1259 case GFX_LINE:
1260 svg_multi_path(fp, &node);
1261 break;
1262 case GFX_AREA:
1263 svg_area(fp, node);
1264 break;
1265 case GFX_TEXT:
1266 svg_text(fp, node);
1267 }
1268 node = node->next;
1269 }
1270 svg_end_tag(fp, "svg");
1271 return 0;
1272 }
1274 /* ------- EPS -------
1275 EPS and Postscript references:
1276 http://partners.adobe.com/asn/developer/technotes/postscript.html
1277 */
1279 typedef struct eps_font
1280 {
1281 const char *ps_font;
1282 int id;
1283 struct eps_font *next;
1284 } eps_font;
1286 typedef struct eps_state
1287 {
1288 FILE *fp;
1289 gfx_canvas_t *canvas;
1290 art_u32 page_width, page_height;
1291 eps_font *font_list;
1292 /*--*/
1293 gfx_color_t color;
1294 const char *font;
1295 double font_size;
1296 double line_width;
1297 int linecap, linejoin;
1298 int has_dash;
1299 } eps_state;
1301 static void eps_set_color(eps_state *state, gfx_color_t color)
1302 {
1303 /* gfx_color_t is RRGGBBAA */
1304 if (state->color == color)
1305 return;
1306 fprintf(state->fp, "%d %d %d Rgb\n",
1307 (int)((color >> 24) & 255),
1308 (int)((color >> 16) & 255),
1309 (int)((color >> 8) & 255));
1310 state->color = color;
1311 }
1313 static int eps_add_font(eps_state *state, gfx_node_t *node)
1314 {
1315 /* The fonts list could be postponed to the end using
1316 (atend), but let's be nice and have them in the header. */
1317 const char *ps_font = afm_get_font_postscript_name(node->filename);
1318 eps_font *ef;
1319 for (ef = state->font_list; ef; ef = ef->next) {
1320 if (!strcmp(ps_font, ef->ps_font))
1321 return 0;
1322 }
1323 ef = malloc(sizeof(eps_font));
1324 if (ef == NULL) {
1325 rrd_set_error("malloc for eps_font");
1326 return -1;
1327 }
1328 ef->next = state->font_list;
1329 ef->ps_font = ps_font;
1330 state->font_list = ef;
1331 return 0;
1332 }
1334 static void eps_list_fonts(eps_state *state, const char *dscName)
1335 {
1336 eps_font *ef;
1337 int lineLen = strlen(dscName);
1338 if (!state->font_list)
1339 return;
1340 fputs(dscName, state->fp);
1341 for (ef = state->font_list; ef; ef = ef->next) {
1342 int nameLen = strlen(ef->ps_font);
1343 if (lineLen + nameLen > 100 && lineLen) {
1344 fputs("\n", state->fp);
1345 fputs("%%- \n", state->fp);
1346 lineLen = 5;
1347 } else {
1348 fputs(" ", state->fp);
1349 lineLen++;
1350 }
1351 fputs(ef->ps_font, state->fp);
1352 lineLen += nameLen;
1353 }
1354 fputs("\n", state->fp);
1355 }
1357 static void eps_define_fonts(eps_state *state)
1358 {
1359 eps_font *ef;
1360 if (!state->font_list)
1361 return;
1362 for (ef = state->font_list; ef; ef = ef->next) {
1363 /* PostScript¨ LANGUAGE REFERENCE third edition
1364 page 349 */
1365 fprintf(state->fp,
1366 "%%\n"
1367 "/%s findfont dup length dict begin\n"
1368 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1369 "/Encoding ISOLatin1Encoding def\n"
1370 "currentdict end\n"
1371 "/%s-ISOLatin1 exch definefont pop\n"
1372 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1373 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1374 }
1375 }
1377 static int eps_prologue(eps_state *state)
1378 {
1379 gfx_node_t *node;
1380 fputs(
1381 "%!PS-Adobe-3.0 EPSF-3.0\n"
1382 "%%Creator: RRDtool 1.2.0 Tobias Oetiker, http://tobi.oetiker.ch\n"
1383 /* can't like weird chars here */
1384 "%%Title: (RRDtool output)\n"
1385 "%%DocumentData: Clean7Bit\n"
1386 "", state->fp);
1387 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1388 state->page_width, state->page_height);
1389 for (node = state->canvas->firstnode; node; node = node->next) {
1390 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1391 return -1;
1392 }
1393 eps_list_fonts(state, "%%DocumentFonts:");
1394 eps_list_fonts(state, "%%DocumentNeededFonts:");
1395 fputs(
1396 "%%EndComments\n"
1397 "%%BeginProlog\n"
1398 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1399 "/bd { bind def } bind def\n"
1400 "", state->fp);
1401 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1402 fputs(
1403 "/X2 {X exch X exch} bd\n"
1404 "/M {X2 moveto} bd\n"
1405 "/L {X2 lineto} bd\n"
1406 "/m {moveto} bd\n"
1407 "/l {lineto} bd\n"
1408 "/S {stroke} bd\n"
1409 "/CP {closepath} bd\n"
1410 "/WS {setlinewidth stroke} bd\n"
1411 "/F {fill} bd\n"
1412 "/TaL { } bd\n"
1413 "/TaC {dup stringwidth pop neg 2 div 0 rmoveto } bd\n"
1414 "/TaR {dup stringwidth pop neg 0 rmoveto } bd\n"
1415 "/TL {moveto TaL show} bd\n"
1416 "/TC {moveto TaC show} bd\n"
1417 "/TR {moveto TaR show} bd\n"
1418 "/Rgb { 255.0 div 3 1 roll\n"
1419 " 255.0 div 3 1 roll \n"
1420 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1421 "", state->fp);
1422 eps_define_fonts(state);
1423 return 0;
1424 }
1426 static void eps_clear_dash(eps_state *state)
1427 {
1428 if (!state->has_dash)
1429 return;
1430 state->has_dash = 0;
1431 fputs("[1 0] 0 setdash\n", state->fp);
1432 }
1434 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1435 {
1436 int i;
1437 FILE *fp = state->fp;
1438 int useOffset = 0;
1439 int clearDashIfAny = 1;
1440 eps_set_color(state, node->color);
1441 if (node->type == GFX_LINE) {
1442 svg_dash dash_info;
1443 if (state->linecap != 1) {
1444 fputs("1 setlinecap\n", fp);
1445 state->linecap = 1;
1446 }
1447 if (state->linejoin != 1) {
1448 fputs("1 setlinejoin\n", fp);
1449 state->linejoin = 1;
1450 }
1451 svg_get_dash(node, &dash_info);
1452 if (dash_info.dash_enable) {
1453 clearDashIfAny = 0;
1454 state->has_dash = 1;
1455 fputs("[", fp);
1456 svg_write_number(fp, dash_info.adjusted_on);
1457 fputs(" ", fp);
1458 svg_write_number(fp, dash_info.adjusted_off);
1459 fputs("] ", fp);
1460 svg_write_number(fp, dash_info.dash_offset);
1461 fputs(" setdash\n", fp);
1462 }
1463 }
1464 if (clearDashIfAny)
1465 eps_clear_dash(state);
1466 for (i = 0; i < node->points; i++) {
1467 ArtVpath *vec = node->path + i;
1468 double x = vec->x;
1469 double y = state->page_height - vec->y;
1470 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1471 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1472 if (useOffset) {
1473 x -= LINEOFFSET;
1474 y -= LINEOFFSET;
1475 }
1476 switch (vec->code) {
1477 case ART_MOVETO_OPEN: /* fall-through */
1478 case ART_MOVETO:
1479 svg_write_number(fp, x);
1480 fputc(' ', fp);
1481 svg_write_number(fp, y);
1482 fputc(' ', fp);
1483 fputs(useOffset ? "M\n" : "m\n", fp);
1484 break;
1485 case ART_LINETO:
1486 svg_write_number(fp, x);
1487 fputc(' ', fp);
1488 svg_write_number(fp, y);
1489 fputc(' ', fp);
1490 fputs(useOffset ? "L\n" : "l\n", fp);
1491 break;
1492 case ART_CURVETO: break; /* unsupported */
1493 case ART_END: break; /* nop */
1494 }
1495 }
1496 if (node->type == GFX_LINE) {
1497 if (node->closed_path)
1498 fputs("CP ", fp);
1499 if (node->size != state->line_width) {
1500 state->line_width = node->size;
1501 svg_write_number(fp, state->line_width);
1502 fputs(" WS\n", fp);
1503 } else {
1504 fputs("S\n", fp);
1505 }
1506 } else {
1507 fputs("F\n", fp);
1508 }
1509 }
1511 static void eps_write_text(eps_state *state, gfx_node_t *node)
1512 {
1513 FILE *fp = state->fp;
1514 const unsigned char *p;
1515 const char *ps_font = afm_get_font_postscript_name(node->filename);
1516 char align = 'L';
1517 double x = node->x;
1518 double y = state->page_height - node->y, ydelta = 0;
1519 int lineLen = 0;
1520 eps_set_color(state, node->color);
1521 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1522 state->font = ps_font;
1523 state->font_size = node->size;
1524 svg_write_number(fp, state->font_size);
1525 fprintf(fp, " SetFont-%s\n", state->font);
1526 }
1527 fputs("(", fp);
1528 lineLen = 20;
1529 for (p = (const unsigned char*)node->text; *p; p++) {
1530 if (lineLen > 70) {
1531 fputs("\\\n", fp); /* backslash and \n */
1532 lineLen = 0;
1533 }
1534 switch (*p) {
1535 case '(':
1536 case ')':
1537 case '\\':
1538 case '\n':
1539 case '\r':
1540 case '\t':
1541 fputc('\\', fp);
1542 lineLen++;
1543 /* fall-through */
1544 default:
1545 if (*p >= 126)
1546 fprintf(fp, "\\%03o", *p);
1547 else
1548 fputc(*p, fp);
1549 lineLen++;
1550 }
1551 }
1552 fputs(") ", fp);
1553 switch(node->valign){
1554 case GFX_V_TOP: ydelta = -node->size; break;
1555 case GFX_V_CENTER: ydelta = -node->size / 3.0; break;
1556 case GFX_V_BOTTOM: break;
1557 case GFX_V_NULL: break;
1558 }
1559 if (node->angle == 0)
1560 y += ydelta;
1561 switch (node->halign) {
1562 case GFX_H_RIGHT: align = 'R'; break;
1563 case GFX_H_CENTER: align = 'C'; break;
1564 case GFX_H_LEFT: align= 'L'; break;
1565 case GFX_H_NULL: align= 'L'; break;
1566 }
1567 if (node->angle != 0) {
1568 fputs("\n", fp);
1569 fputs(" gsave ", fp);
1570 svg_write_number(fp, x);
1571 fputc(' ', fp);
1572 svg_write_number(fp, y);
1573 fputs(" translate ", fp);
1574 svg_write_number(fp, -node->angle);
1575 fputs(" rotate 0 ", fp);
1576 svg_write_number(fp, ydelta);
1577 fputs(" moveto ", fp);
1578 fprintf(fp, "Ta%c", align);
1579 fputs(" show grestore\n", fp);
1580 } else {
1581 svg_write_number(fp, x);
1582 fputc(' ', fp);
1583 svg_write_number(fp, y);
1584 fputs(" T", fp);
1585 fputc(align, fp);
1586 fputc('\n', fp);
1587 }
1588 }
1590 static int eps_write_content(eps_state *state)
1591 {
1592 gfx_node_t *node;
1593 fputs("%\n", state->fp);
1594 for (node = state->canvas->firstnode; node; node = node->next) {
1595 switch (node->type) {
1596 case GFX_LINE:
1597 case GFX_AREA:
1598 eps_write_linearea(state, node);
1599 break;
1600 case GFX_TEXT:
1601 eps_write_text(state, node);
1602 break;
1603 }
1604 }
1605 return 0;
1606 }
1608 int gfx_render_eps (gfx_canvas_t *canvas,
1609 art_u32 width, art_u32 height,
1610 gfx_color_t background, FILE *fp){
1611 struct eps_state state;
1612 state.fp = fp;
1613 state.canvas = canvas;
1614 state.page_width = width;
1615 state.page_height = height;
1616 state.font = "no-default-font";
1617 state.font_size = -1;
1618 state.color = 0; /* black */
1619 state.font_list = NULL;
1620 state.linecap = -1;
1621 state.linejoin = -1;
1622 state.has_dash = 0;
1623 if (eps_prologue(&state) == -1)
1624 return -1;
1625 eps_set_color(&state, background);
1626 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1627 height, width, height, width);
1628 if (eps_write_content(&state) == -1)
1629 return 0;
1630 fputs("showpage\n", fp);
1631 fputs("%%EOF\n", fp);
1632 while (state.font_list) {
1633 eps_font *next = state.font_list->next;
1634 free(state.font_list);
1635 state.font_list = next;
1636 }
1637 return 0;
1638 }
1640 /* ------- PDF -------
1641 PDF references page:
1642 http://partners.adobe.com/asn/developer/technotes/acrobatpdf.html
1643 */
1645 typedef struct pdf_buffer
1646 {
1647 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1648 char *data;
1649 int alloc_size, current_size;
1650 struct pdf_buffer *previous_buffer, *next_buffer;
1651 struct pdf_state *state;
1652 } pdf_buffer;
1654 typedef struct pdf_font
1655 {
1656 const char *ps_font;
1657 pdf_buffer obj;
1658 struct pdf_font *next;
1659 } pdf_font;
1661 typedef struct pdf_state
1662 {
1663 FILE *fp;
1664 gfx_canvas_t *canvas;
1665 art_u32 page_width, page_height;
1666 pdf_font *font_list;
1667 pdf_buffer *first_buffer, *last_buffer;
1668 int pdf_file_pos;
1669 int has_failed;
1670 /*--*/
1671 gfx_color_t stroke_color, fill_color;
1672 int font_id;
1673 double font_size;
1674 double line_width;
1675 svg_dash dash;
1676 int linecap, linejoin;
1677 int last_obj_id;
1678 /*--*/
1679 pdf_buffer pdf_header;
1680 pdf_buffer catalog_obj, pages_obj, page1_obj;
1681 pdf_buffer fontsdict_obj;
1682 pdf_buffer graph_stream;
1683 } pdf_state;
1685 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1686 {
1687 int initial_size = 32;
1688 buf->state = state;
1689 buf->id = -42;
1690 buf->alloc_size = 0;
1691 buf->current_size = 0;
1692 buf->data = (char*)malloc(initial_size);
1693 buf->is_obj = 0;
1694 buf->previous_buffer = NULL;
1695 buf->next_buffer = NULL;
1696 if (buf->data == NULL) {
1697 rrd_set_error("malloc for pdf_buffer data");
1698 state->has_failed = 1;
1699 return;
1700 }
1701 buf->alloc_size = initial_size;
1702 if (state->last_buffer)
1703 state->last_buffer->next_buffer = buf;
1704 if (state->first_buffer == NULL)
1705 state->first_buffer = buf;
1706 buf->previous_buffer = state->last_buffer;
1707 state->last_buffer = buf;
1708 }
1710 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1711 {
1712 if (len <= 0)
1713 return;
1714 if (buf->alloc_size < buf->current_size + len) {
1715 int new_size = buf->alloc_size;
1716 char *new_buf;
1717 while (new_size < buf->current_size + len)
1718 new_size *= 4;
1719 new_buf = (char*)malloc(new_size);
1720 if (new_buf == NULL) {
1721 rrd_set_error("re-malloc for pdf_buffer data");
1722 buf->state->has_failed = 1;
1723 return;
1724 }
1725 memcpy(new_buf, buf->data, buf->current_size);
1726 free(buf->data);
1727 buf->data = new_buf;
1728 buf->alloc_size = new_size;
1729 }
1730 memcpy(buf->data + buf->current_size, text, len);
1731 buf->current_size += len;
1732 }
1734 static void pdf_puts(pdf_buffer *buf, const char *text)
1735 {
1736 pdf_put(buf, text, strlen(text));
1737 }
1739 static void pdf_indent(pdf_buffer *buf)
1740 {
1741 pdf_puts(buf, "\t");
1742 }
1744 static void pdf_putsi(pdf_buffer *buf, const char *text)
1745 {
1746 pdf_indent(buf);
1747 pdf_puts(buf, text);
1748 }
1750 static void pdf_putint(pdf_buffer *buf, int i)
1751 {
1752 char tmp[20];
1753 sprintf(tmp, "%d", i);
1754 pdf_puts(buf, tmp);
1755 }
1757 static void pdf_putnumber(pdf_buffer *buf, double d)
1758 {
1759 char tmp[50];
1760 svg_format_number(tmp, sizeof(tmp), d);
1761 pdf_puts(buf, tmp);
1762 }
1764 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
1765 {
1766 pdf_init_buffer(state, buf);
1767 buf->id = ++state->last_obj_id;
1768 buf->is_obj = 1;
1769 buf->is_stream = 0;
1770 }
1772 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
1773 {
1774 pdf_init_object(state, buf);
1775 buf->is_dict = 1;
1776 }
1778 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
1779 gfx_color_t *current_color, const char *op)
1780 {
1781 /* gfx_color_t is RRGGBBAA */
1782 if (*current_color == color)
1783 return;
1784 pdf_putnumber(buf, ((color >> 24) & 255) / 255.0);
1785 pdf_puts(buf, " ");
1786 pdf_putnumber(buf, ((color >> 16) & 255) / 255.0);
1787 pdf_puts(buf, " ");
1788 pdf_putnumber(buf, ((color >> 8) & 255) / 255.0);
1789 pdf_puts(buf, " ");
1790 pdf_puts(buf, op);
1791 pdf_puts(buf, "\n");
1792 *current_color = color;
1793 }
1795 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
1796 {
1797 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
1798 }
1800 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
1801 {
1802 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
1803 }
1805 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
1806 {
1807 const char *ps_font = afm_get_font_postscript_name(node->filename);
1808 pdf_font *ef;
1809 for (ef = state->font_list; ef; ef = ef->next) {
1810 if (!strcmp(ps_font, ef->ps_font))
1811 return ef;
1812 }
1813 return NULL;
1814 }
1816 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
1817 {
1818 pdf_font *ef = pdf_find_font(state, node);
1819 if (ef)
1820 return;
1821 ef = malloc(sizeof(pdf_font));
1822 if (ef == NULL) {
1823 rrd_set_error("malloc for pdf_font");
1824 state->has_failed = 1;
1825 return;
1826 }
1827 pdf_init_dict(state, &ef->obj);
1828 ef->next = state->font_list;
1829 ef->ps_font = afm_get_font_postscript_name(node->filename);
1830 state->font_list = ef;
1831 /* fonts dict */
1832 pdf_putsi(&state->fontsdict_obj, "/F");
1833 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1834 pdf_puts(&state->fontsdict_obj, " ");
1835 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1836 pdf_puts(&state->fontsdict_obj, " 0 R\n");
1837 /* fonts def */
1838 pdf_putsi(&ef->obj, "/Type /Font\n");
1839 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
1840 pdf_putsi(&ef->obj, "/Name /F");
1841 pdf_putint(&ef->obj, ef->obj.id);
1842 pdf_puts(&ef->obj, "\n");
1843 pdf_putsi(&ef->obj, "/BaseFont /");
1844 pdf_puts(&ef->obj, ef->ps_font);
1845 pdf_puts(&ef->obj, "\n");
1846 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
1847 /* 'Cp1252' (this is latin 1 extended with 27 characters;
1848 the encoding is also known as 'winansi')
1849 http://www.lowagie.com/iText/tutorial/ch09.html */
1850 }
1852 static void pdf_create_fonts(pdf_state *state)
1853 {
1854 gfx_node_t *node;
1855 for (node = state->canvas->firstnode; node; node = node->next) {
1856 if (node->type == GFX_TEXT)
1857 pdf_add_font(state, node);
1858 }
1859 }
1861 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
1862 {
1863 int i;
1864 pdf_buffer *s = &state->graph_stream;
1865 if (node->type == GFX_LINE) {
1866 svg_dash dash_info;
1867 svg_get_dash(node, &dash_info);
1868 if (!svg_dash_equal(&dash_info, &state->dash)) {
1869 state->dash = dash_info;
1870 if (dash_info.dash_enable) {
1871 pdf_puts(s, "[");
1872 pdf_putnumber(s, dash_info.adjusted_on);
1873 pdf_puts(s, " ");
1874 pdf_putnumber(s, dash_info.adjusted_off);
1875 pdf_puts(s, "] ");
1876 pdf_putnumber(s, dash_info.dash_offset);
1877 pdf_puts(s, " d\n");
1878 } else {
1879 pdf_puts(s, "[] 0 d\n");
1880 }
1881 }
1882 pdf_set_stroke_color(s, node->color);
1883 if (state->linecap != 1) {
1884 pdf_puts(s, "1 j\n");
1885 state->linecap = 1;
1886 }
1887 if (state->linejoin != 1) {
1888 pdf_puts(s, "1 J\n");
1889 state->linejoin = 1;
1890 }
1891 if (node->size != state->line_width) {
1892 state->line_width = node->size;
1893 pdf_putnumber(s, state->line_width);
1894 pdf_puts(s, " w\n");
1895 }
1896 } else {
1897 pdf_set_fill_color(s, node->color);
1898 }
1899 for (i = 0; i < node->points; i++) {
1900 ArtVpath *vec = node->path + i;
1901 double x = vec->x;
1902 double y = state->page_height - vec->y;
1903 if (node->type == GFX_AREA) {
1904 x += LINEOFFSET; /* adjust for libart handling of areas */
1905 y -= LINEOFFSET;
1906 }
1907 switch (vec->code) {
1908 case ART_MOVETO_OPEN: /* fall-through */
1909 case ART_MOVETO:
1910 pdf_putnumber(s, x);
1911 pdf_puts(s, " ");
1912 pdf_putnumber(s, y);
1913 pdf_puts(s, " m\n");
1914 break;
1915 case ART_LINETO:
1916 pdf_putnumber(s, x);
1917 pdf_puts(s, " ");
1918 pdf_putnumber(s, y);
1919 pdf_puts(s, " l\n");
1920 break;
1921 case ART_CURVETO: break; /* unsupported */
1922 case ART_END: break; /* nop */
1923 }
1924 }
1925 if (node->type == GFX_LINE) {
1926 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
1927 } else {
1928 pdf_puts(s, "f\n");
1929 }
1930 }
1932 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
1933 int last_was_text, int next_is_text)
1934 {
1935 char tmp[30];
1936 pdf_buffer *s = &state->graph_stream;
1937 const unsigned char *p;
1938 pdf_font *font = pdf_find_font(state, node);
1939 double x = node->x;
1940 double y = state->page_height - node->y;
1941 double dx = 0, dy = 0;
1942 double cos_a = 0, sin_a = 0;
1943 if (font == NULL) {
1944 rrd_set_error("font disappeared");
1945 state->has_failed = 1;
1946 return;
1947 }
1948 switch(node->valign){
1949 case GFX_V_TOP: dy = -node->size; break;
1950 case GFX_V_CENTER: dy = -node->size / 3.0; break;
1951 case GFX_V_BOTTOM: break;
1952 case GFX_V_NULL: break;
1953 }
1954 switch (node->halign) {
1955 case GFX_H_RIGHT: dx = -afm_get_text_width(0, font->ps_font,
1956 node->size, node->tabwidth, node->text);
1957 break;
1958 case GFX_H_CENTER: dx = -afm_get_text_width(0, font->ps_font,
1959 node->size, node->tabwidth, node->text) / 2;
1960 break;
1961 case GFX_H_LEFT: break;
1962 case GFX_H_NULL: break;
1963 }
1964 pdf_set_fill_color(s, node->color);
1965 if (node->angle != 0) {
1966 double a = 2 * M_PI * -node->angle / 360.0;
1967 double new_x, new_y;
1968 cos_a = cos(a);
1969 sin_a = sin(a);
1970 new_x = cos_a * dx - sin_a * dy + x;
1971 new_y = sin_a * dx + cos_a * dy + y;
1972 x = new_x;
1973 y = new_y;
1974 } else {
1975 x += dx;
1976 y += dy;
1977 }
1978 if (!last_was_text)
1979 pdf_puts(s, "BT\n");
1980 if (state->font_id != font->obj.id || node->size != state->font_size) {
1981 state->font_id = font->obj.id;
1982 state->font_size = node->size;
1983 pdf_puts(s, "/F");
1984 pdf_putint(s, font->obj.id);
1985 pdf_puts(s, " ");
1986 pdf_putnumber(s, node->size);
1987 pdf_puts(s, " Tf\n");
1988 }
1989 if (node->angle == 0) {
1990 pdf_puts(s, "1 0 0 1 ");
1991 } else {
1992 pdf_putnumber(s, cos_a);
1993 pdf_puts(s, " ");
1994 pdf_putnumber(s, sin_a);
1995 pdf_puts(s, " ");
1996 pdf_putnumber(s, -sin_a);
1997 pdf_puts(s, " ");
1998 pdf_putnumber(s, cos_a);
1999 pdf_puts(s, " ");
2000 }
2001 pdf_putnumber(s, x);
2002 pdf_puts(s, " ");
2003 pdf_putnumber(s, y);
2004 pdf_puts(s, " Tm\n");
2005 pdf_puts(s, "(");
2006 for (p = (const unsigned char*)node->text; *p; p++) {
2007 switch (*p) {
2008 case '(':
2009 case ')':
2010 case '\\':
2011 case '\n':
2012 case '\r':
2013 case '\t':
2014 pdf_puts(s, "\\");
2015 /* fall-through */
2016 default:
2017 if (*p >= 126) {
2018 snprintf(tmp, sizeof(tmp), "\\%03o", *p);
2019 pdf_puts(s, tmp);
2020 } else {
2021 pdf_put(s, (const char*)p, 1);
2022 }
2023 }
2024 }
2025 pdf_puts(s, ") Tj\n");
2026 if (!next_is_text)
2027 pdf_puts(s, "ET\n");
2028 }
2030 static void pdf_write_content(pdf_state *state)
2031 {
2032 gfx_node_t *node;
2033 int last_was_text = 0, next_is_text;
2034 for (node = state->canvas->firstnode; node; node = node->next) {
2035 switch (node->type) {
2036 case GFX_LINE:
2037 case GFX_AREA:
2038 pdf_write_linearea(state, node);
2039 break;
2040 case GFX_TEXT:
2041 next_is_text = node->next && node->next->type == GFX_TEXT;
2042 pdf_write_text(state, node, last_was_text, next_is_text);
2043 break;
2044 }
2045 last_was_text = node->type == GFX_TEXT;
2046 }
2047 }
2049 static void pdf_init_document(pdf_state *state)
2050 {
2051 pdf_init_buffer(state, &state->pdf_header);
2052 pdf_init_dict(state, &state->catalog_obj);
2053 pdf_init_dict(state, &state->pages_obj);
2054 pdf_init_dict(state, &state->page1_obj);
2055 pdf_init_dict(state, &state->fontsdict_obj);
2056 pdf_create_fonts(state);
2057 if (state->has_failed)
2058 return;
2059 /* make stream last object in file */
2060 pdf_init_object(state, &state->graph_stream);
2061 state->graph_stream.is_stream = 1;
2062 }
2064 static void pdf_setup_document(pdf_state *state)
2065 {
2066 /* all objects created by now, so init code can reference them */
2067 /* HEADER */
2068 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2069 /* following 8 bit comment is recommended by Adobe for
2070 indicating binary file to file transfer applications */
2071 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2072 /* CATALOG */
2073 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2074 pdf_putsi(&state->catalog_obj, "/Pages ");
2075 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2076 pdf_puts(&state->catalog_obj, " 0 R\n");
2077 /* PAGES */
2078 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2079 pdf_putsi(&state->pages_obj, "/Kids [");
2080 pdf_putint(&state->pages_obj, state->page1_obj.id);
2081 pdf_puts(&state->pages_obj, " 0 R]\n");
2082 pdf_putsi(&state->pages_obj, "/Count 1\n");
2083 /* PAGE 1 */
2084 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2085 pdf_putsi(&state->page1_obj, "/Parent ");
2086 pdf_putint(&state->page1_obj, state->pages_obj.id);
2087 pdf_puts(&state->page1_obj, " 0 R\n");
2088 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2089 pdf_putint(&state->page1_obj, state->page_width);
2090 pdf_puts(&state->page1_obj, " ");
2091 pdf_putint(&state->page1_obj, state->page_height);
2092 pdf_puts(&state->page1_obj, "]\n");
2093 pdf_putsi(&state->page1_obj, "/Contents ");
2094 pdf_putint(&state->page1_obj, state->graph_stream.id);
2095 pdf_puts(&state->page1_obj, " 0 R\n");
2096 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2097 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2098 pdf_puts(&state->page1_obj, " 0 R >>\n");
2099 }
2101 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2102 {
2103 fputs(text, state->fp);
2104 state->pdf_file_pos += strlen(text);
2105 }
2107 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2108 {
2109 char tmp[40];
2110 buf->pdf_file_pos = state->pdf_file_pos;
2111 if (buf->is_obj) {
2112 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2113 pdf_write_string_to_file(state, tmp);
2114 }
2115 if (buf->is_dict)
2116 pdf_write_string_to_file(state, "<<\n");
2117 if (buf->is_stream) {
2118 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2119 pdf_write_string_to_file(state, tmp);
2120 pdf_write_string_to_file(state, "stream\n");
2121 }
2122 fwrite(buf->data, 1, buf->current_size, state->fp);
2123 state->pdf_file_pos += buf->current_size;
2124 if (buf->is_stream)
2125 pdf_write_string_to_file(state, "endstream\n");
2126 if (buf->is_dict)
2127 pdf_write_string_to_file(state, ">>\n");
2128 if (buf->is_obj)
2129 pdf_write_string_to_file(state, "endobj\n");
2130 }
2132 static void pdf_write_to_file(pdf_state *state)
2133 {
2134 pdf_buffer *buf = state->first_buffer;
2135 int xref_pos;
2136 state->pdf_file_pos = 0;
2137 pdf_write_buf_to_file(state, &state->pdf_header);
2138 while (buf) {
2139 if (buf->is_obj)
2140 pdf_write_buf_to_file(state, buf);
2141 buf = buf->next_buffer;
2142 }
2143 xref_pos = state->pdf_file_pos;
2144 fprintf(state->fp, "xref\n");
2145 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2146 /* TOC lines must be exactly 20 bytes including \n */
2147 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2148 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2149 if (buf->is_obj)
2150 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2151 }
2152 fprintf(state->fp, "trailer\n");
2153 fprintf(state->fp, "<<\n");
2154 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2155 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2156 fprintf(state->fp, ">>\n");
2157 fprintf(state->fp, "startxref\n");
2158 fprintf(state->fp, "%d\n", xref_pos);
2159 fputs("%%EOF\n", state->fp);
2160 }
2162 static void pdf_free_resources(pdf_state *state)
2163 {
2164 pdf_buffer *buf = state->first_buffer;
2165 while (buf) {
2166 free(buf->data);
2167 buf->data = NULL;
2168 buf->alloc_size = buf->current_size = 0;
2169 buf = buf->next_buffer;
2170 }
2171 while (state->font_list) {
2172 pdf_font *next = state->font_list->next;
2173 free(state->font_list);
2174 state->font_list = next;
2175 }
2176 }
2178 int gfx_render_pdf (gfx_canvas_t *canvas,
2179 art_u32 width, art_u32 height,
2180 gfx_color_t background, FILE *fp){
2181 struct pdf_state state;
2182 memset(&state, 0, sizeof(pdf_state));
2183 state.fp = fp;
2184 state.canvas = canvas;
2185 state.page_width = width;
2186 state.page_height = height;
2187 state.font_id = -1;
2188 state.font_size = -1;
2189 state.font_list = NULL;
2190 state.linecap = -1;
2191 state.linejoin = -1;
2192 pdf_init_document(&state);
2193 /*
2194 pdf_set_color(&state, background);
2195 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2196 height, width, height, width);
2197 */
2198 if (!state.has_failed)
2199 pdf_write_content(&state);
2200 if (!state.has_failed)
2201 pdf_setup_document(&state);
2202 if (!state.has_failed)
2203 pdf_write_to_file(&state);
2204 pdf_free_resources(&state);
2205 return state.has_failed ? -1 : 0;
2206 }