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;
375 #ifdef HAVE_MBSTOWCS
376 wchar_t* w_text;
377 #endif
379 ft_pen.x = 0; /* start at (0,0) !! */
380 ft_pen.y = 0;
382 string = (gfx_string) malloc (sizeof(struct gfx_string_s));
383 string->width = 0;
384 string->height = 0;
385 string->count = strlen (text);
386 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
387 string->num_glyphs = 0;
388 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
389 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
390 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
391 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
393 #ifdef HAVE_MBSTOWCS
394 w_text = (wchar_t) calloc (string->count,sizeof(wchar_t));
395 mbstowcs(w_text,text,string->count);
396 #endif
398 use_kerning = FT_HAS_KERNING(face);
399 previous = 0;
400 glyph = string->glyphs;
401 for (n=0; n<string->count; n++, glyph++) {
402 FT_Vector vec;
403 /* handle the tabs ...
404 have a witespace glyph inserted, but set its width such that the distance
405 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
406 unsigned char letter = text[n];
407 gottab = 0;
408 if (letter == '\\' && n+1 < string->count && text[n+1] == 't'){
409 /* we have a tab here so skip the backslash and
410 set t to ' ' so that we get a white space */
411 gottab = 1;
412 n++;
413 letter = ' ';
414 }
415 if (letter == '\t'){
416 letter = ' ';
417 gottab = 1 ;
418 }
419 /* initialize each struct gfx_char_s */
420 glyph->index = 0;
421 glyph->pos.x = 0;
422 glyph->pos.y = 0;
423 glyph->image = NULL;
425 #ifdef HAVE_MBSTOWCS
426 glyph->index = FT_Get_Char_Index( face, w_text[n] );
427 #else
428 glyph->index = FT_Get_Char_Index( face, letter );
429 #endif
431 /* compute glyph origin */
432 if ( use_kerning && previous && glyph->index ) {
433 FT_Vector kerning;
434 FT_Get_Kerning (face, previous, glyph->index,
435 ft_kerning_default, &kerning);
436 ft_pen.x += kerning.x;
437 ft_pen.y += kerning.y;
438 }
440 /* load the glyph image (in its native format) */
441 /* for now, we take a monochrome glyph bitmap */
442 error = FT_Load_Glyph (face, glyph->index, FT_LOAD_DEFAULT);
443 if (error) {
444 fprintf (stderr, "couldn't load glyph: %c\n", letter);
445 continue;
446 }
447 error = FT_Get_Glyph (slot, &glyph->image);
448 if (error) {
449 fprintf (stderr, "couldn't get glyph from slot: %c\n", letter);
450 continue;
451 }
452 /* if we are in tabbing mode, we replace the tab with a space and shift the position
453 of the space so that its left edge is where the tab was supposed to land us */
454 if (gottab){
455 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
456 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
457 }
458 /* store current pen position */
459 glyph->pos.x = ft_pen.x;
460 glyph->pos.y = ft_pen.y;
463 ft_pen.x += slot->advance.x;
464 ft_pen.y += slot->advance.y;
466 /* rotate glyph */
467 vec = glyph->pos;
468 FT_Vector_Transform (&vec, &string->transform);
469 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
470 if (error) {
471 fprintf (stderr, "couldn't transform glyph\n");
472 continue;
473 }
475 /* convert to a bitmap - destroy native image */
476 error = FT_Glyph_To_Bitmap (&glyph->image, FT_RENDER_MODE_NORMAL, 0, 1);
477 if (error) {
478 fprintf (stderr, "couldn't convert glyph to bitmap\n");
479 continue;
480 }
482 /* increment number of glyphs */
483 previous = glyph->index;
484 string->num_glyphs++;
485 }
486 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
487 compute_string_bbox( string );
488 /* the last character was a tab */
489 if (gottab) {
490 string->width = ft_pen.x;
491 } else {
492 string->width = string->bbox.xMax - string->bbox.xMin;
493 }
494 string->height = string->bbox.yMax - string->bbox.yMin;
495 #ifdef HAVE_MBSTOWSC
496 free(w_text);
497 #endif
499 return string;
500 }
503 static int gfx_save_png (art_u8 *buffer, FILE *fp,
504 long width, long height, long bytes_per_pixel);
505 /* render grafics into png image */
507 int gfx_render_png (gfx_canvas_t *canvas,
508 art_u32 width, art_u32 height,
509 gfx_color_t background, FILE *fp){
512 FT_Library library;
513 gfx_node_t *node = canvas->firstnode;
514 /*
515 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
516 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
517 */
518 unsigned long pys_width = width * canvas->zoom;
519 unsigned long pys_height = height * canvas->zoom;
520 const int bytes_per_pixel = 4;
521 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
522 art_u8 *buffer = art_new (art_u8, rowstride*pys_height);
523 /* fill that buffer with out background color */
524 gfx_color_t *buffp;
525 long i;
526 for (i=0,buffp=(gfx_color_t *)buffer;
527 i<pys_width*pys_height;
528 i++){
529 *(buffp++)=background;
530 }
531 FT_Init_FreeType( &library );
532 while(node){
533 switch (node->type) {
534 case GFX_LINE:
535 case GFX_AREA: {
536 ArtVpath *vec,*pvec;
537 double dst[6];
538 ArtSVP *svp,*svpt;
539 art_affine_scale(dst,canvas->zoom,canvas->zoom);
540 vec = art_vpath_affine_transform(node->path,dst);
541 if (node->closed_path)
542 gfx_libart_close_path(node, &vec);
543 /* gfx_round_scaled_coordinates(vec); */
544 pvec = art_vpath_perturb(vec);
545 art_free(vec);
546 if(node->type == GFX_LINE){
547 svp = art_svp_vpath_stroke ( pvec, ART_PATH_STROKE_JOIN_ROUND,
548 ART_PATH_STROKE_CAP_ROUND,
549 node->size*canvas->zoom,4,0.25);
550 } else {
551 svp = art_svp_from_vpath ( pvec );
552 svpt = art_svp_uncross( svp );
553 art_svp_free(svp);
554 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
555 art_svp_free(svpt);
556 }
557 art_free(pvec);
558 /* this is from gnome since libart does not have this yet */
559 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
560 node->color, buffer, rowstride, NULL);
561 art_svp_free(svp);
562 break;
563 }
564 case GFX_TEXT: {
565 unsigned int n;
566 int error;
567 art_u8 fcolor[4],falpha;
568 FT_Face face;
569 gfx_char glyph;
570 gfx_string string;
571 FT_Vector vec; /* 26.6 */
573 float pen_x = 0.0 , pen_y = 0.0;
574 /* double x,y; */
575 long ix,iy;
577 fcolor[0] = node->color >> 24;
578 fcolor[1] = (node->color >> 16) & 0xff;
579 fcolor[2] = (node->color >> 8) & 0xff;
580 falpha = node->color & 0xff;
581 error = FT_New_Face( library,
582 (char *)node->filename,
583 0,
584 &face );
585 if ( error ) {
586 rrd_set_error("failed to load %s",node->filename);
587 break;
588 }
589 error = FT_Set_Char_Size(face, /* handle to face object */
590 (long)(node->size*64),
591 (long)(node->size*64),
592 (long)(100*canvas->zoom),
593 (long)(100*canvas->zoom));
594 if ( error ) break;
595 pen_x = node->x * canvas->zoom;
596 pen_y = node->y * canvas->zoom;
598 string = gfx_string_create (face, node->text, node->angle, node->tabwidth);
599 switch(node->halign){
600 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
601 break;
602 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
603 -string->bbox.xMax/2:-string->bbox.xMin/2;
604 break;
605 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
606 break;
607 case GFX_H_NULL: vec.x = 0;
608 break;
609 }
611 switch(node->valign){
612 case GFX_V_TOP: vec.y = string->bbox.yMax;
613 break;
614 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
615 string->bbox.yMax/2:string->bbox.yMin/2;
616 break;
617 case GFX_V_BOTTOM: vec.y = 0;
618 break;
619 case GFX_V_NULL: vec.y = 0;
620 break;
621 }
622 pen_x += vec.x/64;
623 pen_y += vec.y/64;
624 glyph = string->glyphs;
625 for(n=0; n<string->num_glyphs; ++n, ++glyph) {
626 int gr;
627 FT_Glyph image;
628 FT_BitmapGlyph bit;
629 /* long buf_x,comp_n; */
630 /* make copy to transform */
631 if (! glyph->image) {
632 fprintf (stderr, "no image\n");
633 continue;
634 }
635 error = FT_Glyph_Copy (glyph->image, &image);
636 if (error) {
637 fprintf (stderr, "couldn't copy image\n");
638 continue;
639 }
641 /* transform it */
642 vec = glyph->pos;
643 FT_Vector_Transform (&vec, &string->transform);
645 bit = (FT_BitmapGlyph) image;
646 gr = bit->bitmap.num_grays -1;
647 /*
648 buf_x = (pen_x + 0.5) + (double)bit->left;
649 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
650 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
651 buf_x *= bytes_per_pixel ;
652 for (iy=0; iy < bit->bitmap.rows; iy++){
653 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
654 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
655 buf_y *= rowstride;
656 for (ix=0;ix < bit->bitmap.width;ix++){
657 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
658 }
659 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
660 }
661 art_free(letter);
662 */
664 for (iy=0; iy < bit->bitmap.rows; iy++){
665 long buf_y = iy+(pen_y+0.5)-bit->top;
666 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
667 buf_y *= rowstride;
668 for (ix=0;ix < bit->bitmap.width;ix++){
669 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
670 art_u8 font_alpha;
672 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
673 buf_x *= bytes_per_pixel ;
674 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
675 if (font_alpha > 0){
676 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
677 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
678 }
679 }
680 }
682 /*
683 for (iy=0; iy < bit->bitmap.rows; iy++){
684 long buf_y = iy+(pen_y+0.5)-bit->top;
685 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
686 buf_y *= rowstride;
687 for (ix=0;ix < bit->bitmap.width;ix++){
688 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
689 art_u8 font_alpha;
691 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
692 buf_x *= bytes_per_pixel ;
693 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
694 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
695 for (iz = 0; iz < 3; iz++){
696 art_u8 *orig = buffer + buf_y + buf_x + iz;
697 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
698 (double)fcolor[iz] / gr * (font_alpha));
699 }
700 }
701 }
702 */
703 FT_Done_Glyph (image);
704 }
705 gfx_string_destroy(string);
706 }
707 }
708 node = node->next;
709 }
710 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
711 art_free(buffer);
712 FT_Done_FreeType( library );
713 return 0;
714 }
716 /* free memory used by nodes this will also remove memory required for
717 associated paths and svcs ... but not for text strings */
718 int
719 gfx_destroy (gfx_canvas_t *canvas){
720 gfx_node_t *next,*node = canvas->firstnode;
721 while(node){
722 next = node->next;
723 art_free(node->path);
724 free(node->text);
725 free(node->filename);
726 art_free(node);
727 node = next;
728 }
729 art_free(canvas);
730 return 0;
731 }
733 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
734 png_structp png_ptr = NULL;
735 png_infop info_ptr = NULL;
736 int i;
737 png_bytep *row_pointers;
738 int rowstride = width * bytes_per_pixel;
739 png_text text[2];
741 if (fp == NULL)
742 return (1);
744 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
745 if (png_ptr == NULL)
746 {
747 return (1);
748 }
749 row_pointers = (png_bytepp)png_malloc(png_ptr,
750 height*sizeof(png_bytep));
752 info_ptr = png_create_info_struct(png_ptr);
754 if (info_ptr == NULL)
755 {
756 png_free(png_ptr,row_pointers);
757 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
758 return (1);
759 }
761 if (setjmp(png_jmpbuf(png_ptr)))
762 {
763 /* If we get here, we had a problem writing the file */
764 png_destroy_write_struct(&png_ptr, &info_ptr);
765 return (1);
766 }
768 png_init_io(png_ptr, fp);
769 png_set_IHDR (png_ptr, info_ptr,width, height,
770 8, PNG_COLOR_TYPE_RGB_ALPHA,
771 PNG_INTERLACE_NONE,
772 PNG_COMPRESSION_TYPE_DEFAULT,
773 PNG_FILTER_TYPE_DEFAULT);
775 text[0].key = "Software";
776 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
777 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
778 png_set_text (png_ptr, info_ptr, text, 1);
780 /* lets make this fast */
781 /* png_set_filter(png_ptr,0,PNG_FILTER_NONE); */
782 png_set_compression_level(png_ptr,1);
783 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
784 /*
785 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
786 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
787 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
789 /* Write header data */
790 png_write_info (png_ptr, info_ptr);
791 for (i = 0; i < height; i++)
792 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
794 png_write_image(png_ptr, row_pointers);
795 png_write_end(png_ptr, info_ptr);
796 png_free(png_ptr,row_pointers);
797 png_destroy_write_struct(&png_ptr, &info_ptr);
798 return 1;
799 }
802 /* ------- SVG -------
803 SVG reference:
804 http://www.w3.org/TR/SVG/
805 */
806 static int svg_indent = 0;
807 static int svg_single_line = 0;
808 static const char *svg_default_font = "Helvetica";
809 typedef struct svg_dash
810 {
811 int dash_enable;
812 double dash_adjust, dash_len, dash_offset;
813 double adjusted_on, adjusted_off;
814 } svg_dash;
817 static void svg_print_indent(FILE *fp)
818 {
819 int i;
820 for (i = svg_indent - svg_single_line; i > 0; i--) {
821 putc(' ', fp);
822 putc(' ', fp);
823 }
824 }
826 static void svg_start_tag(FILE *fp, const char *name)
827 {
828 svg_print_indent(fp);
829 putc('<', fp);
830 fputs(name, fp);
831 svg_indent++;
832 }
834 static void svg_close_tag_single_line(FILE *fp)
835 {
836 svg_single_line++;
837 putc('>', fp);
838 }
840 static void svg_close_tag(FILE *fp)
841 {
842 putc('>', fp);
843 if (!svg_single_line)
844 putc('\n', fp);
845 }
847 static void svg_end_tag(FILE *fp, const char *name)
848 {
849 /* name is NULL if closing empty-node tag */
850 svg_indent--;
851 if (svg_single_line)
852 svg_single_line--;
853 else if (name)
854 svg_print_indent(fp);
855 if (name != NULL) {
856 fputs("</", fp);
857 fputs(name, fp);
858 } else {
859 putc('/', fp);
860 }
861 svg_close_tag(fp);
862 }
864 static void svg_close_tag_empty_node(FILE *fp)
865 {
866 svg_end_tag(fp, NULL);
867 }
869 static void svg_write_text(FILE *fp, const char *text)
870 {
871 const unsigned char *p, *start, *last;
872 unsigned int ch;
873 p = (const unsigned char*)text;
874 if (!p)
875 return;
876 /* trim leading spaces */
877 while (*p == ' ')
878 p++;
879 start = p;
880 /* trim trailing spaces */
881 last = p - 1;
882 while ((ch = *p) != 0) {
883 if (ch != ' ')
884 last = p;
885 p++;
886 }
887 /* encode trimmed text */
888 p = start;
889 while (p <= last) {
890 ch = *p++;
891 ch = afm_host2unicode(ch); /* unsafe macro */
892 switch (ch) {
893 case '&': fputs("&", fp); break;
894 case '<': fputs("<", fp); break;
895 case '>': fputs(">", fp); break;
896 case '"': fputs(""", fp); break;
897 default:
898 if (ch >= 127)
899 fprintf(fp, "&#%d;", ch);
900 else
901 putc(ch, fp);
902 }
903 }
904 }
906 static void svg_format_number(char *buf, int bufsize, double d)
907 {
908 /* omit decimals if integer to reduce filesize */
909 char *p;
910 snprintf(buf, bufsize, "%.2f", d);
911 p = buf; /* doesn't trust snprintf return value */
912 while (*p)
913 p++;
914 while (--p > buf) {
915 char ch = *p;
916 if (ch == '0') {
917 *p = '\0'; /* zap trailing zeros */
918 continue;
919 }
920 if (ch == '.')
921 *p = '\0'; /* zap trailing dot */
922 break;
923 }
924 }
926 static void svg_write_number(FILE *fp, double d)
927 {
928 char buf[60];
929 svg_format_number(buf, sizeof(buf), d);
930 fputs(buf, fp);
931 }
933 static int svg_color_is_black(int c)
934 {
935 /* gfx_color_t is RRGGBBAA */
936 return c == 0x000000FF;
937 }
939 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
940 {
941 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
942 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
943 gfx_color_t opacity = c & 0xFF;
944 fprintf(fp, " %s=\"", attr);
945 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
946 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
947 fprintf(fp, "#%03lX",
948 ( ((rrggbb >> 8) & 0xF00)
949 | ((rrggbb >> 4) & 0x0F0)
950 | ( rrggbb & 0x00F)));
951 } else {
952 fprintf(fp, "#%06lX", rrggbb);
953 }
954 fputs("\"", fp);
955 if (opacity != 0xFF) {
956 fprintf(fp, " stroke-opacity=\"");
957 svg_write_number(fp, opacity / 255.0);
958 fputs("\"", fp);
959 }
960 }
962 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
963 {
964 double offset;
965 int mult;
966 if (node->dash_on <= 0 || node->dash_off <= 0) {
967 d->dash_enable = 0;
968 return;
969 }
970 d->dash_enable = 1;
971 d->dash_len = node->dash_on + node->dash_off;
972 /* dash on/off adjustment due to round caps */
973 d->dash_adjust = 0.8 * node->size;
974 d->adjusted_on = node->dash_on - d->dash_adjust;
975 if (d->adjusted_on < 0.01)
976 d->adjusted_on = 0.01;
977 d->adjusted_off = d->dash_len - d->adjusted_on;
978 /* dash offset calc */
979 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
980 offset = node->path[0].y;
981 else
982 offset = node->path[0].x;
983 mult = (int)fabs(offset / d->dash_len);
984 d->dash_offset = offset - mult * d->dash_len;
985 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
986 d->dash_offset = d->dash_len - d->dash_offset;
987 }
989 static int svg_dash_equal(svg_dash *a, svg_dash *b)
990 {
991 if (a->dash_enable != b->dash_enable)
992 return 0;
993 if (a->adjusted_on != b->adjusted_on)
994 return 0;
995 if (a->adjusted_off != b->adjusted_off)
996 return 0;
997 /* rest of properties will be the same when on+off are */
998 return 1;
999 }
1001 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
1002 {
1003 svg_dash dash_info;
1004 svg_get_dash(node, &dash_info);
1005 fputs(" stroke-width=\"", fp);
1006 svg_write_number(fp, node->size);
1007 fputs("\"", fp);
1008 svg_write_color(fp, node->color, "stroke");
1009 fputs(" fill=\"none\"", fp);
1010 if (dash_info.dash_enable) {
1011 if (dash_info.dash_offset != 0) {
1012 fputs(" stroke-dashoffset=\"", fp);
1013 svg_write_number(fp, dash_info.dash_offset);
1014 fputs("\"", fp);
1015 }
1016 fputs(" stroke-dasharray=\"", fp);
1017 svg_write_number(fp, dash_info.adjusted_on);
1018 fputs(",", fp);
1019 svg_write_number(fp, dash_info.adjusted_off);
1020 fputs("\"", fp);
1021 }
1022 }
1024 static int svg_is_int_step(double a, double b)
1025 {
1026 double diff = fabs(a - b);
1027 return floor(diff) == diff;
1028 }
1030 static int svg_path_straight_segment(FILE *fp,
1031 double lastA, double currentA, double currentB,
1032 gfx_node_t *node,
1033 int segment_idx, int isx, char absChar, char relChar)
1034 {
1035 if (!svg_is_int_step(lastA, currentA)) {
1036 putc(absChar, fp);
1037 svg_write_number(fp, currentA);
1038 return 0;
1039 }
1040 if (segment_idx < node->points - 1) {
1041 ArtVpath *vec = node->path + segment_idx + 1;
1042 if (vec->code == ART_LINETO) {
1043 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1044 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1045 if (nextB == currentB
1046 && ((currentA >= lastA) == (nextA >= currentA))
1047 && svg_is_int_step(currentA, nextA)) {
1048 return 1; /* skip to next as it is a straight line */
1049 }
1050 }
1051 }
1052 putc(relChar, fp);
1053 svg_write_number(fp, currentA - lastA);
1054 return 0;
1055 }
1057 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1058 {
1059 int i;
1060 double lastX = 0, lastY = 0;
1061 /* for straight lines <path..> tags take less space than
1062 <line..> tags because of the efficient packing
1063 in the 'd' attribute */
1064 svg_start_tag(fp, "path");
1065 if (!multi)
1066 svg_common_path_attributes(fp, node);
1067 fputs(" d=\"", fp);
1068 /* specification of the 'd' attribute: */
1069 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1070 for (i = 0; i < node->points; i++) {
1071 ArtVpath *vec = node->path + i;
1072 double x = vec->x - LINEOFFSET;
1073 double y = vec->y - LINEOFFSET;
1074 switch (vec->code) {
1075 case ART_MOVETO_OPEN: /* fall-through */
1076 case ART_MOVETO:
1077 putc('M', fp);
1078 svg_write_number(fp, x);
1079 putc(',', fp);
1080 svg_write_number(fp, y);
1081 break;
1082 case ART_LINETO:
1083 /* try optimize filesize by using minimal lineto commands */
1084 /* without introducing rounding errors. */
1085 if (x == lastX) {
1086 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1087 continue;
1088 } else if (y == lastY) {
1089 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1090 continue;
1091 } else {
1092 putc('L', fp);
1093 svg_write_number(fp, x);
1094 putc(',', fp);
1095 svg_write_number(fp, y);
1096 }
1097 break;
1098 case ART_CURVETO: break; /* unsupported */
1099 case ART_END: break; /* nop */
1100 }
1101 lastX = x;
1102 lastY = y;
1103 }
1104 if (node->closed_path)
1105 fputs(" Z", fp);
1106 fputs("\"", fp);
1107 svg_close_tag_empty_node(fp);
1108 }
1110 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1111 {
1112 /* optimize for multiple paths with the same color, penwidth, etc. */
1113 int num = 1;
1114 gfx_node_t *node = *nodeR;
1115 gfx_node_t *next = node->next;
1116 while (next) {
1117 if (next->type != node->type
1118 || next->size != node->size
1119 || next->color != node->color
1120 || next->dash_on != node->dash_on
1121 || next->dash_off != node->dash_off)
1122 break;
1123 next = next->next;
1124 num++;
1125 }
1126 if (num == 1) {
1127 svg_path(fp, node, 0);
1128 return;
1129 }
1130 svg_start_tag(fp, "g");
1131 svg_common_path_attributes(fp, node);
1132 svg_close_tag(fp);
1133 while (num && node) {
1134 svg_path(fp, node, 1);
1135 if (!--num)
1136 break;
1137 node = node->next;
1138 *nodeR = node;
1139 }
1140 svg_end_tag(fp, "g");
1141 }
1143 static void svg_area(FILE *fp, gfx_node_t *node)
1144 {
1145 int i;
1146 double startX = 0, startY = 0;
1147 svg_start_tag(fp, "polygon");
1148 fputs(" ", fp);
1149 svg_write_color(fp, node->color, "fill");
1150 fputs(" points=\"", fp);
1151 for (i = 0; i < node->points; i++) {
1152 ArtVpath *vec = node->path + i;
1153 double x = vec->x - LINEOFFSET;
1154 double y = vec->y - LINEOFFSET;
1155 switch (vec->code) {
1156 case ART_MOVETO_OPEN: /* fall-through */
1157 case ART_MOVETO:
1158 svg_write_number(fp, x);
1159 putc(',', fp);
1160 svg_write_number(fp, y);
1161 startX = x;
1162 startY = y;
1163 break;
1164 case ART_LINETO:
1165 if (i == node->points - 2
1166 && node->path[i + 1].code == ART_END
1167 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1168 break; /* poly area always closed, no need for last point */
1169 }
1170 putc(' ', fp);
1171 svg_write_number(fp, x);
1172 putc(',', fp);
1173 svg_write_number(fp, y);
1174 break;
1175 case ART_CURVETO: break; /* unsupported */
1176 case ART_END: break; /* nop */
1177 }
1178 }
1179 fputs("\"", fp);
1180 svg_close_tag_empty_node(fp);
1181 }
1183 static void svg_text(FILE *fp, gfx_node_t *node)
1184 {
1185 double x = node->x - LINEOFFSET;
1186 double y = node->y - LINEOFFSET;
1187 if (node->angle != 0) {
1188 svg_start_tag(fp, "g");
1189 fputs(" transform=\"translate(", fp);
1190 svg_write_number(fp, x);
1191 fputs(",", fp);
1192 svg_write_number(fp, y);
1193 fputs(") rotate(", fp);
1194 svg_write_number(fp, node->angle);
1195 fputs(")\"", fp);
1196 x = y = 0;
1197 svg_close_tag(fp);
1198 }
1199 switch (node->valign) {
1200 case GFX_V_TOP: y += node->size; break;
1201 case GFX_V_CENTER: y += node->size / 3; break;
1202 case GFX_V_BOTTOM: break;
1203 case GFX_V_NULL: break;
1204 }
1205 svg_start_tag(fp, "text");
1206 fputs(" x=\"", fp);
1207 svg_write_number(fp, x);
1208 fputs("\" y=\"", fp);
1209 svg_write_number(fp, y);
1211 /* if (strcmp(node->filename, svg_default_font))
1212 fprintf(fp, " font-family=\"%s\"", node->filename);
1213 */
1214 fputs("\" font-family=\"Helvetica", fp);
1215 fputs("\" font-size=\"", fp);
1216 svg_write_number(fp, node->size);
1217 fputs("\"", fp);
1218 if (!svg_color_is_black(node->color))
1219 svg_write_color(fp, node->color, "fill");
1220 switch (node->halign) {
1221 case GFX_H_RIGHT: fputs(" text-anchor=\"end\"", fp); break;
1222 case GFX_H_CENTER: fputs(" text-anchor=\"middle\"", fp); break;
1223 case GFX_H_LEFT: break;
1224 case GFX_H_NULL: break;
1225 }
1226 svg_close_tag_single_line(fp);
1227 /* support for node->tabwidth missing */
1228 svg_write_text(fp, node->text);
1229 svg_end_tag(fp, "text");
1230 if (node->angle != 0)
1231 svg_end_tag(fp, "g");
1232 }
1234 int gfx_render_svg (gfx_canvas_t *canvas,
1235 art_u32 width, art_u32 height,
1236 gfx_color_t background, FILE *fp){
1237 gfx_node_t *node = canvas->firstnode;
1238 fputs(
1239 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1240 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1241 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1242 "<!--\n"
1243 " SVG file created by RRDtool,\n"
1244 " Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch\n"
1245 "\n"
1246 " The width/height attributes in the outhermost svg node\n"
1247 " are just default sizes for the browser which is used\n"
1248 " if the svg file is openened directly without being\n"
1249 " embedded in an html file.\n"
1250 " The viewBox is the local coord system for rrdtool.\n"
1251 "-->\n", fp);
1252 svg_start_tag(fp, "svg");
1253 fputs(" width=\"", fp);
1254 svg_write_number(fp, width * canvas->zoom);
1255 fputs("\" height=\"", fp);
1256 svg_write_number(fp, height * canvas->zoom);
1257 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1258 svg_write_number(fp, -LINEOFFSET);
1259 fputs(" ", fp);
1260 svg_write_number(fp, -LINEOFFSET);
1261 fputs(" ", fp);
1262 svg_write_number(fp, width - LINEOFFSET);
1263 fputs(" ", fp);
1264 svg_write_number(fp, height - LINEOFFSET);
1265 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1266 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1267 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1268 svg_close_tag(fp);
1269 svg_start_tag(fp, "rect");
1270 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1271 svg_write_color(fp, background, "fill");
1272 svg_close_tag_empty_node(fp);
1273 while (node) {
1274 switch (node->type) {
1275 case GFX_LINE:
1276 svg_multi_path(fp, &node);
1277 break;
1278 case GFX_AREA:
1279 svg_area(fp, node);
1280 break;
1281 case GFX_TEXT:
1282 svg_text(fp, node);
1283 }
1284 node = node->next;
1285 }
1286 svg_end_tag(fp, "svg");
1287 return 0;
1288 }
1290 /* ------- EPS -------
1291 EPS and Postscript references:
1292 http://partners.adobe.com/asn/developer/technotes/postscript.html
1293 */
1295 typedef struct eps_font
1296 {
1297 const char *ps_font;
1298 int id;
1299 struct eps_font *next;
1300 } eps_font;
1302 typedef struct eps_state
1303 {
1304 FILE *fp;
1305 gfx_canvas_t *canvas;
1306 art_u32 page_width, page_height;
1307 eps_font *font_list;
1308 /*--*/
1309 gfx_color_t color;
1310 const char *font;
1311 double font_size;
1312 double line_width;
1313 int linecap, linejoin;
1314 int has_dash;
1315 } eps_state;
1317 static void eps_set_color(eps_state *state, gfx_color_t color)
1318 {
1319 /* gfx_color_t is RRGGBBAA */
1320 if (state->color == color)
1321 return;
1322 fprintf(state->fp, "%d %d %d Rgb\n",
1323 (int)((color >> 24) & 255),
1324 (int)((color >> 16) & 255),
1325 (int)((color >> 8) & 255));
1326 state->color = color;
1327 }
1329 static int eps_add_font(eps_state *state, gfx_node_t *node)
1330 {
1331 /* The fonts list could be postponed to the end using
1332 (atend), but let's be nice and have them in the header. */
1333 const char *ps_font = afm_get_font_postscript_name(node->filename);
1334 eps_font *ef;
1335 for (ef = state->font_list; ef; ef = ef->next) {
1336 if (!strcmp(ps_font, ef->ps_font))
1337 return 0;
1338 }
1339 ef = malloc(sizeof(eps_font));
1340 if (ef == NULL) {
1341 rrd_set_error("malloc for eps_font");
1342 return -1;
1343 }
1344 ef->next = state->font_list;
1345 ef->ps_font = ps_font;
1346 state->font_list = ef;
1347 return 0;
1348 }
1350 static void eps_list_fonts(eps_state *state, const char *dscName)
1351 {
1352 eps_font *ef;
1353 int lineLen = strlen(dscName);
1354 if (!state->font_list)
1355 return;
1356 fputs(dscName, state->fp);
1357 for (ef = state->font_list; ef; ef = ef->next) {
1358 int nameLen = strlen(ef->ps_font);
1359 if (lineLen + nameLen > 100 && lineLen) {
1360 fputs("\n", state->fp);
1361 fputs("%%- \n", state->fp);
1362 lineLen = 5;
1363 } else {
1364 fputs(" ", state->fp);
1365 lineLen++;
1366 }
1367 fputs(ef->ps_font, state->fp);
1368 lineLen += nameLen;
1369 }
1370 fputs("\n", state->fp);
1371 }
1373 static void eps_define_fonts(eps_state *state)
1374 {
1375 eps_font *ef;
1376 if (!state->font_list)
1377 return;
1378 for (ef = state->font_list; ef; ef = ef->next) {
1379 /* PostScript¨ LANGUAGE REFERENCE third edition
1380 page 349 */
1381 fprintf(state->fp,
1382 "%%\n"
1383 "/%s findfont dup length dict begin\n"
1384 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1385 "/Encoding ISOLatin1Encoding def\n"
1386 "currentdict end\n"
1387 "/%s-ISOLatin1 exch definefont pop\n"
1388 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1389 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1390 }
1391 }
1393 static int eps_prologue(eps_state *state)
1394 {
1395 gfx_node_t *node;
1396 fputs(
1397 "%!PS-Adobe-3.0 EPSF-3.0\n"
1398 "%%Creator: RRDtool 1.2.0 Tobias Oetiker, http://tobi.oetiker.ch\n"
1399 /* can't like weird chars here */
1400 "%%Title: (RRDtool output)\n"
1401 "%%DocumentData: Clean7Bit\n"
1402 "", state->fp);
1403 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1404 state->page_width, state->page_height);
1405 for (node = state->canvas->firstnode; node; node = node->next) {
1406 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1407 return -1;
1408 }
1409 eps_list_fonts(state, "%%DocumentFonts:");
1410 eps_list_fonts(state, "%%DocumentNeededFonts:");
1411 fputs(
1412 "%%EndComments\n"
1413 "%%BeginProlog\n"
1414 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1415 "/bd { bind def } bind def\n"
1416 "", state->fp);
1417 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1418 fputs(
1419 "/X2 {X exch X exch} bd\n"
1420 "/M {X2 moveto} bd\n"
1421 "/L {X2 lineto} bd\n"
1422 "/m {moveto} bd\n"
1423 "/l {lineto} bd\n"
1424 "/S {stroke} bd\n"
1425 "/CP {closepath} bd\n"
1426 "/WS {setlinewidth stroke} bd\n"
1427 "/F {fill} bd\n"
1428 "/TaL { } bd\n"
1429 "/TaC {dup stringwidth pop neg 2 div 0 rmoveto } bd\n"
1430 "/TaR {dup stringwidth pop neg 0 rmoveto } bd\n"
1431 "/TL {moveto TaL show} bd\n"
1432 "/TC {moveto TaC show} bd\n"
1433 "/TR {moveto TaR show} bd\n"
1434 "/Rgb { 255.0 div 3 1 roll\n"
1435 " 255.0 div 3 1 roll \n"
1436 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1437 "", state->fp);
1438 eps_define_fonts(state);
1439 return 0;
1440 }
1442 static void eps_clear_dash(eps_state *state)
1443 {
1444 if (!state->has_dash)
1445 return;
1446 state->has_dash = 0;
1447 fputs("[1 0] 0 setdash\n", state->fp);
1448 }
1450 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1451 {
1452 int i;
1453 FILE *fp = state->fp;
1454 int useOffset = 0;
1455 int clearDashIfAny = 1;
1456 eps_set_color(state, node->color);
1457 if (node->type == GFX_LINE) {
1458 svg_dash dash_info;
1459 if (state->linecap != 1) {
1460 fputs("1 setlinecap\n", fp);
1461 state->linecap = 1;
1462 }
1463 if (state->linejoin != 1) {
1464 fputs("1 setlinejoin\n", fp);
1465 state->linejoin = 1;
1466 }
1467 svg_get_dash(node, &dash_info);
1468 if (dash_info.dash_enable) {
1469 clearDashIfAny = 0;
1470 state->has_dash = 1;
1471 fputs("[", fp);
1472 svg_write_number(fp, dash_info.adjusted_on);
1473 fputs(" ", fp);
1474 svg_write_number(fp, dash_info.adjusted_off);
1475 fputs("] ", fp);
1476 svg_write_number(fp, dash_info.dash_offset);
1477 fputs(" setdash\n", fp);
1478 }
1479 }
1480 if (clearDashIfAny)
1481 eps_clear_dash(state);
1482 for (i = 0; i < node->points; i++) {
1483 ArtVpath *vec = node->path + i;
1484 double x = vec->x;
1485 double y = state->page_height - vec->y;
1486 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1487 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1488 if (useOffset) {
1489 x -= LINEOFFSET;
1490 y -= LINEOFFSET;
1491 }
1492 switch (vec->code) {
1493 case ART_MOVETO_OPEN: /* fall-through */
1494 case ART_MOVETO:
1495 svg_write_number(fp, x);
1496 fputc(' ', fp);
1497 svg_write_number(fp, y);
1498 fputc(' ', fp);
1499 fputs(useOffset ? "M\n" : "m\n", fp);
1500 break;
1501 case ART_LINETO:
1502 svg_write_number(fp, x);
1503 fputc(' ', fp);
1504 svg_write_number(fp, y);
1505 fputc(' ', fp);
1506 fputs(useOffset ? "L\n" : "l\n", fp);
1507 break;
1508 case ART_CURVETO: break; /* unsupported */
1509 case ART_END: break; /* nop */
1510 }
1511 }
1512 if (node->type == GFX_LINE) {
1513 if (node->closed_path)
1514 fputs("CP ", fp);
1515 if (node->size != state->line_width) {
1516 state->line_width = node->size;
1517 svg_write_number(fp, state->line_width);
1518 fputs(" WS\n", fp);
1519 } else {
1520 fputs("S\n", fp);
1521 }
1522 } else {
1523 fputs("F\n", fp);
1524 }
1525 }
1527 static void eps_write_text(eps_state *state, gfx_node_t *node)
1528 {
1529 FILE *fp = state->fp;
1530 const unsigned char *p;
1531 const char *ps_font = afm_get_font_postscript_name(node->filename);
1532 char align = 'L';
1533 double x = node->x;
1534 double y = state->page_height - node->y, ydelta = 0;
1535 int lineLen = 0;
1536 eps_set_color(state, node->color);
1537 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1538 state->font = ps_font;
1539 state->font_size = node->size;
1540 svg_write_number(fp, state->font_size);
1541 fprintf(fp, " SetFont-%s\n", state->font);
1542 }
1543 fputs("(", fp);
1544 lineLen = 20;
1545 for (p = (const unsigned char*)node->text; *p; p++) {
1546 if (lineLen > 70) {
1547 fputs("\\\n", fp); /* backslash and \n */
1548 lineLen = 0;
1549 }
1550 switch (*p) {
1551 case '(':
1552 case ')':
1553 case '\\':
1554 case '\n':
1555 case '\r':
1556 case '\t':
1557 fputc('\\', fp);
1558 lineLen++;
1559 /* fall-through */
1560 default:
1561 if (*p >= 126)
1562 fprintf(fp, "\\%03o", *p);
1563 else
1564 fputc(*p, fp);
1565 lineLen++;
1566 }
1567 }
1568 fputs(") ", fp);
1569 switch(node->valign){
1570 case GFX_V_TOP: ydelta = -node->size; break;
1571 case GFX_V_CENTER: ydelta = -node->size / 3.0; break;
1572 case GFX_V_BOTTOM: break;
1573 case GFX_V_NULL: break;
1574 }
1575 if (node->angle == 0)
1576 y += ydelta;
1577 switch (node->halign) {
1578 case GFX_H_RIGHT: align = 'R'; break;
1579 case GFX_H_CENTER: align = 'C'; break;
1580 case GFX_H_LEFT: align= 'L'; break;
1581 case GFX_H_NULL: align= 'L'; break;
1582 }
1583 if (node->angle != 0) {
1584 fputs("\n", fp);
1585 fputs(" gsave ", fp);
1586 svg_write_number(fp, x);
1587 fputc(' ', fp);
1588 svg_write_number(fp, y);
1589 fputs(" translate ", fp);
1590 svg_write_number(fp, -node->angle);
1591 fputs(" rotate 0 ", fp);
1592 svg_write_number(fp, ydelta);
1593 fputs(" moveto ", fp);
1594 fprintf(fp, "Ta%c", align);
1595 fputs(" show grestore\n", fp);
1596 } else {
1597 svg_write_number(fp, x);
1598 fputc(' ', fp);
1599 svg_write_number(fp, y);
1600 fputs(" T", fp);
1601 fputc(align, fp);
1602 fputc('\n', fp);
1603 }
1604 }
1606 static int eps_write_content(eps_state *state)
1607 {
1608 gfx_node_t *node;
1609 fputs("%\n", state->fp);
1610 for (node = state->canvas->firstnode; node; node = node->next) {
1611 switch (node->type) {
1612 case GFX_LINE:
1613 case GFX_AREA:
1614 eps_write_linearea(state, node);
1615 break;
1616 case GFX_TEXT:
1617 eps_write_text(state, node);
1618 break;
1619 }
1620 }
1621 return 0;
1622 }
1624 int gfx_render_eps (gfx_canvas_t *canvas,
1625 art_u32 width, art_u32 height,
1626 gfx_color_t background, FILE *fp){
1627 struct eps_state state;
1628 state.fp = fp;
1629 state.canvas = canvas;
1630 state.page_width = width;
1631 state.page_height = height;
1632 state.font = "no-default-font";
1633 state.font_size = -1;
1634 state.color = 0; /* black */
1635 state.font_list = NULL;
1636 state.linecap = -1;
1637 state.linejoin = -1;
1638 state.has_dash = 0;
1639 if (eps_prologue(&state) == -1)
1640 return -1;
1641 eps_set_color(&state, background);
1642 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1643 height, width, height, width);
1644 if (eps_write_content(&state) == -1)
1645 return 0;
1646 fputs("showpage\n", fp);
1647 fputs("%%EOF\n", fp);
1648 while (state.font_list) {
1649 eps_font *next = state.font_list->next;
1650 free(state.font_list);
1651 state.font_list = next;
1652 }
1653 return 0;
1654 }
1656 /* ------- PDF -------
1657 PDF references page:
1658 http://partners.adobe.com/asn/developer/technotes/acrobatpdf.html
1659 */
1661 typedef struct pdf_buffer
1662 {
1663 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1664 char *data;
1665 int alloc_size, current_size;
1666 struct pdf_buffer *previous_buffer, *next_buffer;
1667 struct pdf_state *state;
1668 } pdf_buffer;
1670 typedef struct pdf_font
1671 {
1672 const char *ps_font;
1673 pdf_buffer obj;
1674 struct pdf_font *next;
1675 } pdf_font;
1677 typedef struct pdf_state
1678 {
1679 FILE *fp;
1680 gfx_canvas_t *canvas;
1681 art_u32 page_width, page_height;
1682 pdf_font *font_list;
1683 pdf_buffer *first_buffer, *last_buffer;
1684 int pdf_file_pos;
1685 int has_failed;
1686 /*--*/
1687 gfx_color_t stroke_color, fill_color;
1688 int font_id;
1689 double font_size;
1690 double line_width;
1691 svg_dash dash;
1692 int linecap, linejoin;
1693 int last_obj_id;
1694 /*--*/
1695 pdf_buffer pdf_header;
1696 pdf_buffer catalog_obj, pages_obj, page1_obj;
1697 pdf_buffer fontsdict_obj;
1698 pdf_buffer graph_stream;
1699 } pdf_state;
1701 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1702 {
1703 int initial_size = 32;
1704 buf->state = state;
1705 buf->id = -42;
1706 buf->alloc_size = 0;
1707 buf->current_size = 0;
1708 buf->data = (char*)malloc(initial_size);
1709 buf->is_obj = 0;
1710 buf->previous_buffer = NULL;
1711 buf->next_buffer = NULL;
1712 if (buf->data == NULL) {
1713 rrd_set_error("malloc for pdf_buffer data");
1714 state->has_failed = 1;
1715 return;
1716 }
1717 buf->alloc_size = initial_size;
1718 if (state->last_buffer)
1719 state->last_buffer->next_buffer = buf;
1720 if (state->first_buffer == NULL)
1721 state->first_buffer = buf;
1722 buf->previous_buffer = state->last_buffer;
1723 state->last_buffer = buf;
1724 }
1726 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1727 {
1728 if (len <= 0)
1729 return;
1730 if (buf->alloc_size < buf->current_size + len) {
1731 int new_size = buf->alloc_size;
1732 char *new_buf;
1733 while (new_size < buf->current_size + len)
1734 new_size *= 4;
1735 new_buf = (char*)malloc(new_size);
1736 if (new_buf == NULL) {
1737 rrd_set_error("re-malloc for pdf_buffer data");
1738 buf->state->has_failed = 1;
1739 return;
1740 }
1741 memcpy(new_buf, buf->data, buf->current_size);
1742 free(buf->data);
1743 buf->data = new_buf;
1744 buf->alloc_size = new_size;
1745 }
1746 memcpy(buf->data + buf->current_size, text, len);
1747 buf->current_size += len;
1748 }
1750 static void pdf_puts(pdf_buffer *buf, const char *text)
1751 {
1752 pdf_put(buf, text, strlen(text));
1753 }
1755 static void pdf_indent(pdf_buffer *buf)
1756 {
1757 pdf_puts(buf, "\t");
1758 }
1760 static void pdf_putsi(pdf_buffer *buf, const char *text)
1761 {
1762 pdf_indent(buf);
1763 pdf_puts(buf, text);
1764 }
1766 static void pdf_putint(pdf_buffer *buf, int i)
1767 {
1768 char tmp[20];
1769 sprintf(tmp, "%d", i);
1770 pdf_puts(buf, tmp);
1771 }
1773 static void pdf_putnumber(pdf_buffer *buf, double d)
1774 {
1775 char tmp[50];
1776 svg_format_number(tmp, sizeof(tmp), d);
1777 pdf_puts(buf, tmp);
1778 }
1780 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
1781 {
1782 pdf_init_buffer(state, buf);
1783 buf->id = ++state->last_obj_id;
1784 buf->is_obj = 1;
1785 buf->is_stream = 0;
1786 }
1788 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
1789 {
1790 pdf_init_object(state, buf);
1791 buf->is_dict = 1;
1792 }
1794 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
1795 gfx_color_t *current_color, const char *op)
1796 {
1797 /* gfx_color_t is RRGGBBAA */
1798 if (*current_color == color)
1799 return;
1800 pdf_putnumber(buf, ((color >> 24) & 255) / 255.0);
1801 pdf_puts(buf, " ");
1802 pdf_putnumber(buf, ((color >> 16) & 255) / 255.0);
1803 pdf_puts(buf, " ");
1804 pdf_putnumber(buf, ((color >> 8) & 255) / 255.0);
1805 pdf_puts(buf, " ");
1806 pdf_puts(buf, op);
1807 pdf_puts(buf, "\n");
1808 *current_color = color;
1809 }
1811 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
1812 {
1813 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
1814 }
1816 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
1817 {
1818 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
1819 }
1821 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
1822 {
1823 const char *ps_font = afm_get_font_postscript_name(node->filename);
1824 pdf_font *ef;
1825 for (ef = state->font_list; ef; ef = ef->next) {
1826 if (!strcmp(ps_font, ef->ps_font))
1827 return ef;
1828 }
1829 return NULL;
1830 }
1832 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
1833 {
1834 pdf_font *ef = pdf_find_font(state, node);
1835 if (ef)
1836 return;
1837 ef = malloc(sizeof(pdf_font));
1838 if (ef == NULL) {
1839 rrd_set_error("malloc for pdf_font");
1840 state->has_failed = 1;
1841 return;
1842 }
1843 pdf_init_dict(state, &ef->obj);
1844 ef->next = state->font_list;
1845 ef->ps_font = afm_get_font_postscript_name(node->filename);
1846 state->font_list = ef;
1847 /* fonts dict */
1848 pdf_putsi(&state->fontsdict_obj, "/F");
1849 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1850 pdf_puts(&state->fontsdict_obj, " ");
1851 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1852 pdf_puts(&state->fontsdict_obj, " 0 R\n");
1853 /* fonts def */
1854 pdf_putsi(&ef->obj, "/Type /Font\n");
1855 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
1856 pdf_putsi(&ef->obj, "/Name /F");
1857 pdf_putint(&ef->obj, ef->obj.id);
1858 pdf_puts(&ef->obj, "\n");
1859 pdf_putsi(&ef->obj, "/BaseFont /");
1860 pdf_puts(&ef->obj, ef->ps_font);
1861 pdf_puts(&ef->obj, "\n");
1862 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
1863 /* 'Cp1252' (this is latin 1 extended with 27 characters;
1864 the encoding is also known as 'winansi')
1865 http://www.lowagie.com/iText/tutorial/ch09.html */
1866 }
1868 static void pdf_create_fonts(pdf_state *state)
1869 {
1870 gfx_node_t *node;
1871 for (node = state->canvas->firstnode; node; node = node->next) {
1872 if (node->type == GFX_TEXT)
1873 pdf_add_font(state, node);
1874 }
1875 }
1877 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
1878 {
1879 int i;
1880 pdf_buffer *s = &state->graph_stream;
1881 if (node->type == GFX_LINE) {
1882 svg_dash dash_info;
1883 svg_get_dash(node, &dash_info);
1884 if (!svg_dash_equal(&dash_info, &state->dash)) {
1885 state->dash = dash_info;
1886 if (dash_info.dash_enable) {
1887 pdf_puts(s, "[");
1888 pdf_putnumber(s, dash_info.adjusted_on);
1889 pdf_puts(s, " ");
1890 pdf_putnumber(s, dash_info.adjusted_off);
1891 pdf_puts(s, "] ");
1892 pdf_putnumber(s, dash_info.dash_offset);
1893 pdf_puts(s, " d\n");
1894 } else {
1895 pdf_puts(s, "[] 0 d\n");
1896 }
1897 }
1898 pdf_set_stroke_color(s, node->color);
1899 if (state->linecap != 1) {
1900 pdf_puts(s, "1 j\n");
1901 state->linecap = 1;
1902 }
1903 if (state->linejoin != 1) {
1904 pdf_puts(s, "1 J\n");
1905 state->linejoin = 1;
1906 }
1907 if (node->size != state->line_width) {
1908 state->line_width = node->size;
1909 pdf_putnumber(s, state->line_width);
1910 pdf_puts(s, " w\n");
1911 }
1912 } else {
1913 pdf_set_fill_color(s, node->color);
1914 }
1915 for (i = 0; i < node->points; i++) {
1916 ArtVpath *vec = node->path + i;
1917 double x = vec->x;
1918 double y = state->page_height - vec->y;
1919 if (node->type == GFX_AREA) {
1920 x += LINEOFFSET; /* adjust for libart handling of areas */
1921 y -= LINEOFFSET;
1922 }
1923 switch (vec->code) {
1924 case ART_MOVETO_OPEN: /* fall-through */
1925 case ART_MOVETO:
1926 pdf_putnumber(s, x);
1927 pdf_puts(s, " ");
1928 pdf_putnumber(s, y);
1929 pdf_puts(s, " m\n");
1930 break;
1931 case ART_LINETO:
1932 pdf_putnumber(s, x);
1933 pdf_puts(s, " ");
1934 pdf_putnumber(s, y);
1935 pdf_puts(s, " l\n");
1936 break;
1937 case ART_CURVETO: break; /* unsupported */
1938 case ART_END: break; /* nop */
1939 }
1940 }
1941 if (node->type == GFX_LINE) {
1942 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
1943 } else {
1944 pdf_puts(s, "f\n");
1945 }
1946 }
1948 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
1949 int last_was_text, int next_is_text)
1950 {
1951 char tmp[30];
1952 pdf_buffer *s = &state->graph_stream;
1953 const unsigned char *p;
1954 pdf_font *font = pdf_find_font(state, node);
1955 double x = node->x;
1956 double y = state->page_height - node->y;
1957 double dx = 0, dy = 0;
1958 double cos_a = 0, sin_a = 0;
1959 if (font == NULL) {
1960 rrd_set_error("font disappeared");
1961 state->has_failed = 1;
1962 return;
1963 }
1964 switch(node->valign){
1965 case GFX_V_TOP: dy = -node->size; break;
1966 case GFX_V_CENTER: dy = -node->size / 3.0; break;
1967 case GFX_V_BOTTOM: break;
1968 case GFX_V_NULL: break;
1969 }
1970 switch (node->halign) {
1971 case GFX_H_RIGHT: dx = -afm_get_text_width(0, font->ps_font,
1972 node->size, node->tabwidth, node->text);
1973 break;
1974 case GFX_H_CENTER: dx = -afm_get_text_width(0, font->ps_font,
1975 node->size, node->tabwidth, node->text) / 2;
1976 break;
1977 case GFX_H_LEFT: break;
1978 case GFX_H_NULL: break;
1979 }
1980 pdf_set_fill_color(s, node->color);
1981 if (node->angle != 0) {
1982 double a = 2 * M_PI * -node->angle / 360.0;
1983 double new_x, new_y;
1984 cos_a = cos(a);
1985 sin_a = sin(a);
1986 new_x = cos_a * dx - sin_a * dy + x;
1987 new_y = sin_a * dx + cos_a * dy + y;
1988 x = new_x;
1989 y = new_y;
1990 } else {
1991 x += dx;
1992 y += dy;
1993 }
1994 if (!last_was_text)
1995 pdf_puts(s, "BT\n");
1996 if (state->font_id != font->obj.id || node->size != state->font_size) {
1997 state->font_id = font->obj.id;
1998 state->font_size = node->size;
1999 pdf_puts(s, "/F");
2000 pdf_putint(s, font->obj.id);
2001 pdf_puts(s, " ");
2002 pdf_putnumber(s, node->size);
2003 pdf_puts(s, " Tf\n");
2004 }
2005 if (node->angle == 0) {
2006 pdf_puts(s, "1 0 0 1 ");
2007 } else {
2008 pdf_putnumber(s, cos_a);
2009 pdf_puts(s, " ");
2010 pdf_putnumber(s, sin_a);
2011 pdf_puts(s, " ");
2012 pdf_putnumber(s, -sin_a);
2013 pdf_puts(s, " ");
2014 pdf_putnumber(s, cos_a);
2015 pdf_puts(s, " ");
2016 }
2017 pdf_putnumber(s, x);
2018 pdf_puts(s, " ");
2019 pdf_putnumber(s, y);
2020 pdf_puts(s, " Tm\n");
2021 pdf_puts(s, "(");
2022 for (p = (const unsigned char*)node->text; *p; p++) {
2023 switch (*p) {
2024 case '(':
2025 case ')':
2026 case '\\':
2027 case '\n':
2028 case '\r':
2029 case '\t':
2030 pdf_puts(s, "\\");
2031 /* fall-through */
2032 default:
2033 if (*p >= 126) {
2034 snprintf(tmp, sizeof(tmp), "\\%03o", *p);
2035 pdf_puts(s, tmp);
2036 } else {
2037 pdf_put(s, (const char*)p, 1);
2038 }
2039 }
2040 }
2041 pdf_puts(s, ") Tj\n");
2042 if (!next_is_text)
2043 pdf_puts(s, "ET\n");
2044 }
2046 static void pdf_write_content(pdf_state *state)
2047 {
2048 gfx_node_t *node;
2049 int last_was_text = 0, next_is_text;
2050 for (node = state->canvas->firstnode; node; node = node->next) {
2051 switch (node->type) {
2052 case GFX_LINE:
2053 case GFX_AREA:
2054 pdf_write_linearea(state, node);
2055 break;
2056 case GFX_TEXT:
2057 next_is_text = node->next && node->next->type == GFX_TEXT;
2058 pdf_write_text(state, node, last_was_text, next_is_text);
2059 break;
2060 }
2061 last_was_text = node->type == GFX_TEXT;
2062 }
2063 }
2065 static void pdf_init_document(pdf_state *state)
2066 {
2067 pdf_init_buffer(state, &state->pdf_header);
2068 pdf_init_dict(state, &state->catalog_obj);
2069 pdf_init_dict(state, &state->pages_obj);
2070 pdf_init_dict(state, &state->page1_obj);
2071 pdf_init_dict(state, &state->fontsdict_obj);
2072 pdf_create_fonts(state);
2073 if (state->has_failed)
2074 return;
2075 /* make stream last object in file */
2076 pdf_init_object(state, &state->graph_stream);
2077 state->graph_stream.is_stream = 1;
2078 }
2080 static void pdf_setup_document(pdf_state *state)
2081 {
2082 /* all objects created by now, so init code can reference them */
2083 /* HEADER */
2084 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2085 /* following 8 bit comment is recommended by Adobe for
2086 indicating binary file to file transfer applications */
2087 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2088 /* CATALOG */
2089 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2090 pdf_putsi(&state->catalog_obj, "/Pages ");
2091 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2092 pdf_puts(&state->catalog_obj, " 0 R\n");
2093 /* PAGES */
2094 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2095 pdf_putsi(&state->pages_obj, "/Kids [");
2096 pdf_putint(&state->pages_obj, state->page1_obj.id);
2097 pdf_puts(&state->pages_obj, " 0 R]\n");
2098 pdf_putsi(&state->pages_obj, "/Count 1\n");
2099 /* PAGE 1 */
2100 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2101 pdf_putsi(&state->page1_obj, "/Parent ");
2102 pdf_putint(&state->page1_obj, state->pages_obj.id);
2103 pdf_puts(&state->page1_obj, " 0 R\n");
2104 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2105 pdf_putint(&state->page1_obj, state->page_width);
2106 pdf_puts(&state->page1_obj, " ");
2107 pdf_putint(&state->page1_obj, state->page_height);
2108 pdf_puts(&state->page1_obj, "]\n");
2109 pdf_putsi(&state->page1_obj, "/Contents ");
2110 pdf_putint(&state->page1_obj, state->graph_stream.id);
2111 pdf_puts(&state->page1_obj, " 0 R\n");
2112 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2113 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2114 pdf_puts(&state->page1_obj, " 0 R >>\n");
2115 }
2117 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2118 {
2119 fputs(text, state->fp);
2120 state->pdf_file_pos += strlen(text);
2121 }
2123 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2124 {
2125 char tmp[40];
2126 buf->pdf_file_pos = state->pdf_file_pos;
2127 if (buf->is_obj) {
2128 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2129 pdf_write_string_to_file(state, tmp);
2130 }
2131 if (buf->is_dict)
2132 pdf_write_string_to_file(state, "<<\n");
2133 if (buf->is_stream) {
2134 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2135 pdf_write_string_to_file(state, tmp);
2136 pdf_write_string_to_file(state, "stream\n");
2137 }
2138 fwrite(buf->data, 1, buf->current_size, state->fp);
2139 state->pdf_file_pos += buf->current_size;
2140 if (buf->is_stream)
2141 pdf_write_string_to_file(state, "endstream\n");
2142 if (buf->is_dict)
2143 pdf_write_string_to_file(state, ">>\n");
2144 if (buf->is_obj)
2145 pdf_write_string_to_file(state, "endobj\n");
2146 }
2148 static void pdf_write_to_file(pdf_state *state)
2149 {
2150 pdf_buffer *buf = state->first_buffer;
2151 int xref_pos;
2152 state->pdf_file_pos = 0;
2153 pdf_write_buf_to_file(state, &state->pdf_header);
2154 while (buf) {
2155 if (buf->is_obj)
2156 pdf_write_buf_to_file(state, buf);
2157 buf = buf->next_buffer;
2158 }
2159 xref_pos = state->pdf_file_pos;
2160 fprintf(state->fp, "xref\n");
2161 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2162 /* TOC lines must be exactly 20 bytes including \n */
2163 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2164 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2165 if (buf->is_obj)
2166 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2167 }
2168 fprintf(state->fp, "trailer\n");
2169 fprintf(state->fp, "<<\n");
2170 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2171 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2172 fprintf(state->fp, ">>\n");
2173 fprintf(state->fp, "startxref\n");
2174 fprintf(state->fp, "%d\n", xref_pos);
2175 fputs("%%EOF\n", state->fp);
2176 }
2178 static void pdf_free_resources(pdf_state *state)
2179 {
2180 pdf_buffer *buf = state->first_buffer;
2181 while (buf) {
2182 free(buf->data);
2183 buf->data = NULL;
2184 buf->alloc_size = buf->current_size = 0;
2185 buf = buf->next_buffer;
2186 }
2187 while (state->font_list) {
2188 pdf_font *next = state->font_list->next;
2189 free(state->font_list);
2190 state->font_list = next;
2191 }
2192 }
2194 int gfx_render_pdf (gfx_canvas_t *canvas,
2195 art_u32 width, art_u32 height,
2196 gfx_color_t background, FILE *fp){
2197 struct pdf_state state;
2198 memset(&state, 0, sizeof(pdf_state));
2199 state.fp = fp;
2200 state.canvas = canvas;
2201 state.page_width = width;
2202 state.page_height = height;
2203 state.font_id = -1;
2204 state.font_size = -1;
2205 state.font_list = NULL;
2206 state.linecap = -1;
2207 state.linejoin = -1;
2208 pdf_init_document(&state);
2209 /*
2210 pdf_set_color(&state, background);
2211 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2212 height, width, height, width);
2213 */
2214 if (!state.has_failed)
2215 pdf_write_content(&state);
2216 if (!state.has_failed)
2217 pdf_setup_document(&state);
2218 if (!state.has_failed)
2219 pdf_write_to_file(&state);
2220 pdf_free_resources(&state);
2221 return state.has_failed ? -1 : 0;
2222 }