1 /****************************************************************************
2 * RRDtool 1.2.1 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 ( gfx_canvas_t *canvas, FT_Face face,
49 const char *text, int rotation, double tabwidth, double size);
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 canvas->font_aa_threshold = -1.0;
92 canvas->aa_type = AA_NORMAL;
93 return canvas;
94 }
96 /* create a new line */
97 gfx_node_t *gfx_new_line(gfx_canvas_t *canvas,
98 double X0, double Y0,
99 double X1, double Y1,
100 double width, gfx_color_t color){
101 return gfx_new_dashed_line(canvas, X0, Y0, X1, Y1, width, color, 0, 0);
102 }
104 gfx_node_t *gfx_new_dashed_line(gfx_canvas_t *canvas,
105 double X0, double Y0,
106 double X1, double Y1,
107 double width, gfx_color_t color,
108 double dash_on, double dash_off){
110 gfx_node_t *node;
111 ArtVpath *vec;
112 node = gfx_new_node(canvas,GFX_LINE);
113 if (node == NULL) return NULL;
114 vec = art_new(ArtVpath, 3);
115 if (vec == NULL) return NULL;
116 vec[0].code = ART_MOVETO_OPEN; vec[0].x=X0+LINEOFFSET; vec[0].y=Y0+LINEOFFSET;
117 vec[1].code = ART_LINETO; vec[1].x=X1+LINEOFFSET; vec[1].y=Y1+LINEOFFSET;
118 vec[2].code = ART_END; vec[2].x=0;vec[2].y=0;
120 node->points = 3;
121 node->points_max = 3;
122 node->color = color;
123 node->size = width;
124 node->dash_on = dash_on;
125 node->dash_off = dash_off;
126 node->path = vec;
127 return node;
128 }
130 /* create a new area */
131 gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,
132 double X0, double Y0,
133 double X1, double Y1,
134 double X2, double Y2,
135 gfx_color_t color) {
137 gfx_node_t *node;
138 ArtVpath *vec;
139 node = gfx_new_node(canvas,GFX_AREA);
140 if (node == NULL) return NULL;
141 vec = art_new(ArtVpath, 5);
142 if (vec == NULL) return NULL;
143 vec[0].code = ART_MOVETO; vec[0].x=X0; vec[0].y=Y0;
144 vec[1].code = ART_LINETO; vec[1].x=X1; vec[1].y=Y1;
145 vec[2].code = ART_LINETO; vec[2].x=X2; vec[2].y=Y2;
146 vec[3].code = ART_LINETO; vec[3].x=X0; vec[3].y=Y0;
147 vec[4].code = ART_END; vec[4].x=0; vec[4].y=0;
149 node->points = 5;
150 node->points_max = 5;
151 node->color = color;
152 node->path = vec;
154 return node;
155 }
157 /* add a point to a line or to an area */
158 int gfx_add_point (gfx_node_t *node,
159 double x, double y){
160 if (node == NULL) return 1;
161 if (node->type == GFX_AREA) {
162 double X0 = node->path[0].x;
163 double Y0 = node->path[0].y;
164 node->points -= 2;
165 art_vpath_add_point (&(node->path),
166 &(node->points),
167 &(node->points_max),
168 ART_LINETO,
169 x,y);
170 art_vpath_add_point (&(node->path),
171 &(node->points),
172 &(node->points_max),
173 ART_LINETO,
174 X0,Y0);
175 art_vpath_add_point (&(node->path),
176 &(node->points),
177 &(node->points_max),
178 ART_END,
179 0,0);
180 } else if (node->type == GFX_LINE) {
181 node->points -= 1;
182 art_vpath_add_point (&(node->path),
183 &(node->points),
184 &(node->points_max),
185 ART_LINETO,
186 x+LINEOFFSET,y+LINEOFFSET);
187 art_vpath_add_point (&(node->path),
188 &(node->points),
189 &(node->points_max),
190 ART_END,
191 0,0);
193 } else {
194 /* can only add point to areas and lines */
195 return 1;
196 }
197 return 0;
198 }
200 void gfx_close_path (gfx_node_t *node) {
201 node->closed_path = 1;
202 if (node->path[0].code == ART_MOVETO_OPEN)
203 node->path[0].code = ART_MOVETO;
204 }
206 /* create a text node */
207 gfx_node_t *gfx_new_text (gfx_canvas_t *canvas,
208 double x, double y, gfx_color_t color,
209 char* font, double size,
210 double tabwidth, double angle,
211 enum gfx_h_align_en h_align,
212 enum gfx_v_align_en v_align,
213 char* text){
214 gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT);
216 node->text = strdup(text);
217 node->size = size;
218 node->filename = strdup(font);
219 node->x = x;
220 node->y = y;
221 node->angle = angle;
222 node->color = color;
223 node->tabwidth = tabwidth;
224 node->halign = h_align;
225 node->valign = v_align;
226 #if 0
227 /* debugging: show text anchor
228 green is along x-axis, red is downward y-axis */
229 if (1) {
230 double a = 2 * M_PI * -node->angle / 360.0;
231 double cos_a = cos(a);
232 double sin_a = sin(a);
233 double len = 3;
234 gfx_new_line(canvas,
235 x, y,
236 x + len * cos_a, y - len * sin_a,
237 0.2, 0x00FF0000);
238 gfx_new_line(canvas,
239 x, y,
240 x + len * sin_a, y + len * cos_a,
241 0.2, 0xFF000000);
242 }
243 #endif
244 return node;
245 }
247 int gfx_render(gfx_canvas_t *canvas,
248 art_u32 width, art_u32 height,
249 gfx_color_t background, FILE *fp){
250 switch (canvas->imgformat) {
251 case IF_PNG:
252 return gfx_render_png (canvas, width, height, background, fp);
253 case IF_SVG:
254 return gfx_render_svg (canvas, width, height, background, fp);
255 case IF_EPS:
256 return gfx_render_eps (canvas, width, height, background, fp);
257 case IF_PDF:
258 return gfx_render_pdf (canvas, width, height, background, fp);
259 default:
260 return -1;
261 }
262 }
264 static void gfx_string_destroy ( gfx_string string ) {
265 unsigned int n;
266 if (string->glyphs) {
267 for (n=0; n<string->num_glyphs; ++n)
268 FT_Done_Glyph (string->glyphs[n].image);
269 free (string->glyphs);
270 }
271 free (string);
272 }
275 double gfx_get_text_width ( gfx_canvas_t *canvas,
276 double start, char* font, double size,
277 double tabwidth, char* text, int rotation){
278 switch (canvas->imgformat) {
279 case IF_PNG:
280 return gfx_get_text_width_libart (canvas, start, font, size, tabwidth, text, rotation);
281 case IF_SVG: /* fall through */
282 case IF_EPS:
283 case IF_PDF:
284 return afm_get_text_width(start, font, size, tabwidth, text);
285 default:
286 return size * strlen(text);
287 }
288 }
290 double gfx_get_text_width_libart (
291 gfx_canvas_t *canvas, double start, char* font, double size,
292 double tabwidth, char* text, int rotation ){
294 int error;
295 double text_width=0;
296 FT_Face face;
297 FT_Library library=NULL;
298 gfx_string string;
300 FT_Init_FreeType( &library );
301 error = FT_New_Face( library, font, 0, &face );
302 if ( error ) return -1;
303 error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
304 if ( error ) return -1;
306 string = gfx_string_create( canvas, face, text, rotation, tabwidth, size );
307 text_width = string->width;
308 gfx_string_destroy(string);
309 FT_Done_FreeType(library);
310 return text_width/64;
311 }
313 static void gfx_libart_close_path(gfx_node_t *node, ArtVpath **vec)
314 {
315 /* libart must have end==start for closed paths,
316 even if using ART_MOVETO and not ART_MOVETO_OPEN
317 so add extra point which is the same as the starting point */
318 int points_max = node->points; /* scaled array has exact size */
319 int points = node->points - 1;
320 art_vpath_add_point (vec, &points, &points_max, ART_LINETO,
321 (**vec).x, (**vec).y);
322 art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
323 }
326 /* find bbox of a string */
327 static void compute_string_bbox(gfx_string string) {
328 unsigned int n;
329 FT_BBox bbox;
331 bbox.xMin = bbox.yMin = 32000;
332 bbox.xMax = bbox.yMax = -32000;
333 for ( n = 0; n < string->num_glyphs; n++ ) {
334 FT_BBox glyph_bbox;
335 FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
336 &glyph_bbox );
337 if (glyph_bbox.xMin < bbox.xMin) {
338 bbox.xMin = glyph_bbox.xMin;
339 }
340 if (glyph_bbox.yMin < bbox.yMin) {
341 bbox.yMin = glyph_bbox.yMin;
342 }
343 if (glyph_bbox.xMax > bbox.xMax) {
344 bbox.xMax = glyph_bbox.xMax;
345 }
346 if (glyph_bbox.yMax > bbox.yMax) {
347 bbox.yMax = glyph_bbox.yMax;
348 }
349 }
350 if ( bbox.xMin > bbox.xMax ) {
351 bbox.xMin = 0;
352 bbox.yMin = 0;
353 bbox.xMax = 0;
354 bbox.yMax = 0;
355 }
356 string->bbox.xMin = bbox.xMin;
357 string->bbox.xMax = bbox.xMax;
358 string->bbox.yMin = bbox.yMin;
359 string->bbox.yMax = bbox.yMax;
360 }
362 /* create a free type glyph string */
363 gfx_string gfx_string_create(gfx_canvas_t *canvas, FT_Face face,const char *text,
364 int rotation, double tabwidth, double size )
365 {
367 FT_GlyphSlot slot = face->glyph; /* a small shortcut */
368 FT_Bool use_kerning;
369 FT_UInt previous;
370 FT_Vector ft_pen;
372 gfx_string string;
373 gfx_char glyph; /* current glyph in table */
374 unsigned int n;
375 int error;
376 int gottab = 0;
377 ft_pen.x = 0; /* start at (0,0) !! */
378 ft_pen.y = 0;
380 string = (gfx_string) malloc (sizeof(struct gfx_string_s));
381 string->width = 0;
382 string->height = 0;
383 string->count = strlen (text);
384 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
385 string->num_glyphs = 0;
386 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
387 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
388 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
389 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
391 use_kerning = FT_HAS_KERNING(face);
392 previous = 0;
393 glyph = string->glyphs;
394 for (n=0; n<string->count;glyph++) {
395 FT_Vector vec;
396 /* handle the tabs ...
397 have a witespace glyph inserted, but set its width such that the distance
398 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
399 unsigned char letter = text[n];
401 gottab = 0;
402 if (letter == '\\' && n+1 < string->count && text[n+1] == 't'){
403 /* we have a tab here so skip the backslash and
404 set t to ' ' so that we get a white space */
405 gottab = 1;
406 n++;
407 letter = ' ';
408 }
409 if (letter == '\t'){
410 letter = ' ';
411 gottab = 1 ;
412 }
413 /* initialize each struct gfx_char_s */
414 glyph->index = 0;
415 glyph->pos.x = 0;
416 glyph->pos.y = 0;
417 glyph->image = NULL;
419 glyph->index = FT_Get_Char_Index( face, letter );
421 /* compute glyph origin */
422 if ( use_kerning && previous && glyph->index ) {
423 FT_Vector kerning;
424 FT_Get_Kerning (face, previous, glyph->index,
425 ft_kerning_default, &kerning);
426 ft_pen.x += kerning.x;
427 ft_pen.y += kerning.y;
428 }
430 /* load the glyph image (in its native format) */
431 /* for now, we take a monochrome glyph bitmap */
432 error = FT_Load_Glyph (face, glyph->index, size > canvas->font_aa_threshold ?
433 canvas->aa_type == AA_NORMAL ? FT_LOAD_TARGET_NORMAL :
434 canvas->aa_type == AA_LIGHT ? FT_LOAD_TARGET_LIGHT :
435 FT_LOAD_TARGET_MONO : FT_LOAD_TARGET_MONO);
436 if (error) {
437 fprintf (stderr, "couldn't load glyph: %c\n", letter);
438 continue;
439 }
440 error = FT_Get_Glyph (slot, &glyph->image);
441 if (error) {
442 fprintf (stderr, "couldn't get glyph from slot: %c\n", letter);
443 continue;
444 }
445 /* if we are in tabbing mode, we replace the tab with a space and shift the position
446 of the space so that its left edge is where the tab was supposed to land us */
447 if (gottab){
448 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
449 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
450 }
451 /* store current pen position */
452 glyph->pos.x = ft_pen.x;
453 glyph->pos.y = ft_pen.y;
456 ft_pen.x += slot->advance.x;
457 ft_pen.y += slot->advance.y;
459 /* rotate glyph */
460 vec = glyph->pos;
461 FT_Vector_Transform (&vec, &string->transform);
462 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
463 if (error) {
464 fprintf (stderr, "couldn't transform glyph\n");
465 continue;
466 }
468 /* convert to a bitmap - destroy native image */
469 error = FT_Glyph_To_Bitmap (&glyph->image, size > canvas->font_aa_threshold ?
470 canvas->aa_type == AA_NORMAL ? FT_RENDER_MODE_NORMAL :
471 canvas->aa_type == AA_LIGHT ? FT_RENDER_MODE_LIGHT :
472 FT_RENDER_MODE_MONO : FT_RENDER_MODE_MONO, 0, 1);
473 if (error) {
474 fprintf (stderr, "couldn't convert glyph to bitmap\n");
475 continue;
476 }
478 /* increment number of glyphs */
479 previous = glyph->index;
480 string->num_glyphs++;
481 n++;
483 }
484 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
485 compute_string_bbox( string );
486 /* the last character was a tab */
487 /* if (gottab) { */
488 string->width = ft_pen.x;
489 /* } else {
490 string->width = string->bbox.xMax - string->bbox.xMin;
491 } */
492 string->height = string->bbox.yMax - string->bbox.yMin;
494 return string;
495 }
498 static int gfx_save_png (art_u8 *buffer, FILE *fp,
499 long width, long height, long bytes_per_pixel);
500 /* render grafics into png image */
502 int gfx_render_png (gfx_canvas_t *canvas,
503 art_u32 width, art_u32 height,
504 gfx_color_t background, FILE *fp){
507 FT_Library library;
508 gfx_node_t *node = canvas->firstnode;
509 /*
510 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
511 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
512 */
513 unsigned long pys_width = width * canvas->zoom;
514 unsigned long pys_height = height * canvas->zoom;
515 const int bytes_per_pixel = 4;
516 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
517 art_u8 *buffer = art_new (art_u8, rowstride*pys_height);
518 /* fill that buffer with out background color */
519 gfx_color_t *buffp;
520 long i;
521 for (i=0,buffp=(gfx_color_t *)buffer;
522 i<pys_width*pys_height;
523 i++){
524 *(buffp++)=background;
525 }
526 FT_Init_FreeType( &library );
527 while(node){
528 switch (node->type) {
529 case GFX_LINE:
530 case GFX_AREA: {
531 ArtVpath *vec,*pvec;
532 double dst[6];
533 ArtSVP *svp,*svpt;
534 art_affine_scale(dst,canvas->zoom,canvas->zoom);
535 vec = art_vpath_affine_transform(node->path,dst);
536 if (node->closed_path)
537 gfx_libart_close_path(node, &vec);
538 /* gfx_round_scaled_coordinates(vec); */
539 pvec = art_vpath_perturb(vec);
540 art_free(vec);
541 if(node->type == GFX_LINE){
542 svp = art_svp_vpath_stroke ( pvec, ART_PATH_STROKE_JOIN_ROUND,
543 ART_PATH_STROKE_CAP_ROUND,
544 node->size*canvas->zoom,4,0.25);
545 } else {
546 svp = art_svp_from_vpath ( pvec );
547 svpt = art_svp_uncross( svp );
548 art_svp_free(svp);
549 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
550 art_svp_free(svpt);
551 }
552 art_free(pvec);
553 /* this is from gnome since libart does not have this yet */
554 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
555 node->color, buffer, rowstride, NULL);
556 art_svp_free(svp);
557 break;
558 }
559 case GFX_TEXT: {
560 unsigned int n;
561 int error;
562 art_u8 fcolor[4],falpha;
563 FT_Face face;
564 gfx_char glyph;
565 gfx_string string;
566 FT_Vector vec; /* 26.6 */
568 float pen_x = 0.0 , pen_y = 0.0;
569 /* double x,y; */
570 long ix,iy;
572 fcolor[0] = node->color >> 24;
573 fcolor[1] = (node->color >> 16) & 0xff;
574 fcolor[2] = (node->color >> 8) & 0xff;
575 falpha = node->color & 0xff;
576 error = FT_New_Face( library,
577 (char *)node->filename,
578 0,
579 &face );
580 if ( error ) {
581 rrd_set_error("failed to load %s",node->filename);
582 break;
583 }
584 error = FT_Set_Char_Size(face, /* handle to face object */
585 (long)(node->size*64),
586 (long)(node->size*64),
587 (long)(100*canvas->zoom),
588 (long)(100*canvas->zoom));
589 if ( error ) break;
590 pen_x = node->x * canvas->zoom;
591 pen_y = node->y * canvas->zoom;
593 string = gfx_string_create (canvas, face, node->text, node->angle, node->tabwidth, node->size);
594 switch(node->halign){
595 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
596 break;
597 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
598 -string->bbox.xMax/2:-string->bbox.xMin/2;
599 break;
600 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
601 break;
602 case GFX_H_NULL: vec.x = 0;
603 break;
604 }
606 switch(node->valign){
607 case GFX_V_TOP: vec.y = string->bbox.yMax;
608 break;
609 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
610 string->bbox.yMax/2:string->bbox.yMin/2;
611 break;
612 case GFX_V_BOTTOM: vec.y = 0;
613 break;
614 case GFX_V_NULL: vec.y = 0;
615 break;
616 }
617 pen_x += vec.x/64;
618 pen_y += vec.y/64;
619 glyph = string->glyphs;
620 for(n=0; n<string->num_glyphs; ++n, ++glyph) {
621 int gr;
622 FT_Glyph image;
623 FT_BitmapGlyph bit;
624 /* long buf_x,comp_n; */
625 /* make copy to transform */
626 if (! glyph->image) {
627 fprintf (stderr, "no image\n");
628 continue;
629 }
630 error = FT_Glyph_Copy (glyph->image, &image);
631 if (error) {
632 fprintf (stderr, "couldn't copy image\n");
633 continue;
634 }
636 /* transform it */
637 vec = glyph->pos;
638 FT_Vector_Transform (&vec, &string->transform);
640 bit = (FT_BitmapGlyph) image;
641 gr = bit->bitmap.num_grays -1;
642 /*
643 buf_x = (pen_x + 0.5) + (double)bit->left;
644 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
645 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
646 buf_x *= bytes_per_pixel ;
647 for (iy=0; iy < bit->bitmap.rows; iy++){
648 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
649 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
650 buf_y *= rowstride;
651 for (ix=0;ix < bit->bitmap.width;ix++){
652 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
653 }
654 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
655 }
656 art_free(letter);
657 */
658 switch ( bit->bitmap.pixel_mode ) {
659 case FT_PIXEL_MODE_GRAY:
660 for (iy=0; iy < bit->bitmap.rows; iy++){
661 long buf_y = iy+(pen_y+0.5)-bit->top;
662 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
663 buf_y *= rowstride;
664 for (ix=0;ix < bit->bitmap.width;ix++){
665 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
666 art_u8 font_alpha;
668 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
669 buf_x *= bytes_per_pixel ;
670 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix);
671 if (font_alpha > 0){
672 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
673 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
674 }
675 }
676 }
677 break;
679 case FT_PIXEL_MODE_MONO:
680 for (iy=0; iy < bit->bitmap.rows; iy++){
681 long buf_y = iy+(pen_y+0.5)-bit->top;
682 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
683 buf_y *= rowstride;
684 for (ix=0;ix < bit->bitmap.width;ix++){
685 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
687 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
688 buf_x *= bytes_per_pixel ;
689 if ( (fcolor[3] = falpha * ((*(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix/8) >> (7 - (ix % 8))) & 1)) > 0 )
690 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
691 }
692 }
693 break;
695 default:
696 rrd_set_error("unknown freetype pixel mode: %d", bit->bitmap.pixel_mode);
697 break;
698 }
700 /*
701 for (iy=0; iy < bit->bitmap.rows; iy++){
702 long buf_y = iy+(pen_y+0.5)-bit->top;
703 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
704 buf_y *= rowstride;
705 for (ix=0;ix < bit->bitmap.width;ix++){
706 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
707 art_u8 font_alpha;
709 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
710 buf_x *= bytes_per_pixel ;
711 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
712 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
713 for (iz = 0; iz < 3; iz++){
714 art_u8 *orig = buffer + buf_y + buf_x + iz;
715 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
716 (double)fcolor[iz] / gr * (font_alpha));
717 }
718 }
719 }
720 */
721 FT_Done_Glyph (image);
722 }
723 gfx_string_destroy(string);
724 }
725 }
726 node = node->next;
727 }
728 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
729 art_free(buffer);
730 FT_Done_FreeType( library );
731 return 0;
732 }
734 /* free memory used by nodes this will also remove memory required for
735 associated paths and svcs ... but not for text strings */
736 int
737 gfx_destroy (gfx_canvas_t *canvas){
738 gfx_node_t *next,*node = canvas->firstnode;
739 while(node){
740 next = node->next;
741 art_free(node->path);
742 free(node->text);
743 free(node->filename);
744 art_free(node);
745 node = next;
746 }
747 art_free(canvas);
748 return 0;
749 }
751 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
752 png_structp png_ptr = NULL;
753 png_infop info_ptr = NULL;
754 int i;
755 png_bytep *row_pointers;
756 int rowstride = width * bytes_per_pixel;
757 png_text text[2];
759 if (fp == NULL)
760 return (1);
762 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
763 if (png_ptr == NULL)
764 {
765 return (1);
766 }
767 row_pointers = (png_bytepp)png_malloc(png_ptr,
768 height*sizeof(png_bytep));
770 info_ptr = png_create_info_struct(png_ptr);
772 if (info_ptr == NULL)
773 {
774 png_free(png_ptr,row_pointers);
775 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
776 return (1);
777 }
779 if (setjmp(png_jmpbuf(png_ptr)))
780 {
781 /* If we get here, we had a problem writing the file */
782 png_destroy_write_struct(&png_ptr, &info_ptr);
783 return (1);
784 }
786 png_init_io(png_ptr, fp);
787 png_set_IHDR (png_ptr, info_ptr,width, height,
788 8, PNG_COLOR_TYPE_RGB_ALPHA,
789 PNG_INTERLACE_NONE,
790 PNG_COMPRESSION_TYPE_DEFAULT,
791 PNG_FILTER_TYPE_DEFAULT);
793 text[0].key = "Software";
794 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
795 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
796 png_set_text (png_ptr, info_ptr, text, 1);
798 /* lets make this fast */
799 /* png_set_filter(png_ptr,0,PNG_FILTER_NONE); */
800 png_set_compression_level(png_ptr,1);
801 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
802 /*
803 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
804 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
805 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
807 /* Write header data */
808 png_write_info (png_ptr, info_ptr);
809 for (i = 0; i < height; i++)
810 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
812 png_write_image(png_ptr, row_pointers);
813 png_write_end(png_ptr, info_ptr);
814 png_free(png_ptr,row_pointers);
815 png_destroy_write_struct(&png_ptr, &info_ptr);
816 return 1;
817 }
820 /* ------- SVG -------
821 SVG reference:
822 http://www.w3.org/TR/SVG/
823 */
824 static int svg_indent = 0;
825 static int svg_single_line = 0;
826 static const char *svg_default_font = "Helvetica";
827 typedef struct svg_dash
828 {
829 int dash_enable;
830 double dash_adjust, dash_len, dash_offset;
831 double adjusted_on, adjusted_off;
832 } svg_dash;
835 static void svg_print_indent(FILE *fp)
836 {
837 int i;
838 for (i = svg_indent - svg_single_line; i > 0; i--) {
839 putc(' ', fp);
840 putc(' ', fp);
841 }
842 }
844 static void svg_start_tag(FILE *fp, const char *name)
845 {
846 svg_print_indent(fp);
847 putc('<', fp);
848 fputs(name, fp);
849 svg_indent++;
850 }
852 static void svg_close_tag_single_line(FILE *fp)
853 {
854 svg_single_line++;
855 putc('>', fp);
856 }
858 static void svg_close_tag(FILE *fp)
859 {
860 putc('>', fp);
861 if (!svg_single_line)
862 putc('\n', fp);
863 }
865 static void svg_end_tag(FILE *fp, const char *name)
866 {
867 /* name is NULL if closing empty-node tag */
868 svg_indent--;
869 if (svg_single_line)
870 svg_single_line--;
871 else if (name)
872 svg_print_indent(fp);
873 if (name != NULL) {
874 fputs("</", fp);
875 fputs(name, fp);
876 } else {
877 putc('/', fp);
878 }
879 svg_close_tag(fp);
880 }
882 static void svg_close_tag_empty_node(FILE *fp)
883 {
884 svg_end_tag(fp, NULL);
885 }
887 static void svg_write_text(FILE *fp, const char *text)
888 {
889 const unsigned char *p, *start, *last;
890 unsigned int ch;
891 p = (const unsigned char*)text;
892 if (!p)
893 return;
894 /* trim leading spaces */
895 while (*p == ' ')
896 p++;
897 start = p;
898 /* trim trailing spaces */
899 last = p - 1;
900 while ((ch = *p) != 0) {
901 if (ch != ' ')
902 last = p;
903 p++;
904 }
905 /* encode trimmed text */
906 p = start;
907 while (p <= last) {
908 ch = *p++;
909 ch = afm_host2unicode(ch); /* unsafe macro */
910 switch (ch) {
911 case '&': fputs("&", fp); break;
912 case '<': fputs("<", fp); break;
913 case '>': fputs(">", fp); break;
914 case '"': fputs(""", fp); break;
915 default:
916 if (ch >= 127)
917 fprintf(fp, "&#%d;", ch);
918 else
919 putc(ch, fp);
920 }
921 }
922 }
924 static void svg_format_number(char *buf, int bufsize, double d)
925 {
926 /* omit decimals if integer to reduce filesize */
927 char *p;
928 snprintf(buf, bufsize, "%.2f", d);
929 p = buf; /* doesn't trust snprintf return value */
930 while (*p)
931 p++;
932 while (--p > buf) {
933 char ch = *p;
934 if (ch == '0') {
935 *p = '\0'; /* zap trailing zeros */
936 continue;
937 }
938 if (ch == '.')
939 *p = '\0'; /* zap trailing dot */
940 break;
941 }
942 }
944 static void svg_write_number(FILE *fp, double d)
945 {
946 char buf[60];
947 svg_format_number(buf, sizeof(buf), d);
948 fputs(buf, fp);
949 }
951 static int svg_color_is_black(int c)
952 {
953 /* gfx_color_t is RRGGBBAA */
954 return c == 0x000000FF;
955 }
957 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
958 {
959 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
960 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
961 gfx_color_t opacity = c & 0xFF;
962 fprintf(fp, " %s=\"", attr);
963 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
964 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
965 fprintf(fp, "#%03lX",
966 ( ((rrggbb >> 8) & 0xF00)
967 | ((rrggbb >> 4) & 0x0F0)
968 | ( rrggbb & 0x00F)));
969 } else {
970 fprintf(fp, "#%06lX", rrggbb);
971 }
972 fputs("\"", fp);
973 if (opacity != 0xFF) {
974 fprintf(fp, " stroke-opacity=\"");
975 svg_write_number(fp, opacity / 255.0);
976 fputs("\"", fp);
977 }
978 }
980 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
981 {
982 double offset;
983 int mult;
984 if (node->dash_on <= 0 || node->dash_off <= 0) {
985 d->dash_enable = 0;
986 return;
987 }
988 d->dash_enable = 1;
989 d->dash_len = node->dash_on + node->dash_off;
990 /* dash on/off adjustment due to round caps */
991 d->dash_adjust = 0.8 * node->size;
992 d->adjusted_on = node->dash_on - d->dash_adjust;
993 if (d->adjusted_on < 0.01)
994 d->adjusted_on = 0.01;
995 d->adjusted_off = d->dash_len - d->adjusted_on;
996 /* dash offset calc */
997 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
998 offset = node->path[0].y;
999 else
1000 offset = node->path[0].x;
1001 mult = (int)fabs(offset / d->dash_len);
1002 d->dash_offset = offset - mult * d->dash_len;
1003 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
1004 d->dash_offset = d->dash_len - d->dash_offset;
1005 }
1007 static int svg_dash_equal(svg_dash *a, svg_dash *b)
1008 {
1009 if (a->dash_enable != b->dash_enable)
1010 return 0;
1011 if (a->adjusted_on != b->adjusted_on)
1012 return 0;
1013 if (a->adjusted_off != b->adjusted_off)
1014 return 0;
1015 /* rest of properties will be the same when on+off are */
1016 return 1;
1017 }
1019 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
1020 {
1021 svg_dash dash_info;
1022 svg_get_dash(node, &dash_info);
1023 fputs(" stroke-width=\"", fp);
1024 svg_write_number(fp, node->size);
1025 fputs("\"", fp);
1026 svg_write_color(fp, node->color, "stroke");
1027 fputs(" fill=\"none\"", fp);
1028 if (dash_info.dash_enable) {
1029 if (dash_info.dash_offset != 0) {
1030 fputs(" stroke-dashoffset=\"", fp);
1031 svg_write_number(fp, dash_info.dash_offset);
1032 fputs("\"", fp);
1033 }
1034 fputs(" stroke-dasharray=\"", fp);
1035 svg_write_number(fp, dash_info.adjusted_on);
1036 fputs(",", fp);
1037 svg_write_number(fp, dash_info.adjusted_off);
1038 fputs("\"", fp);
1039 }
1040 }
1042 static int svg_is_int_step(double a, double b)
1043 {
1044 double diff = fabs(a - b);
1045 return floor(diff) == diff;
1046 }
1048 static int svg_path_straight_segment(FILE *fp,
1049 double lastA, double currentA, double currentB,
1050 gfx_node_t *node,
1051 int segment_idx, int isx, char absChar, char relChar)
1052 {
1053 if (!svg_is_int_step(lastA, currentA)) {
1054 putc(absChar, fp);
1055 svg_write_number(fp, currentA);
1056 return 0;
1057 }
1058 if (segment_idx < node->points - 1) {
1059 ArtVpath *vec = node->path + segment_idx + 1;
1060 if (vec->code == ART_LINETO) {
1061 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1062 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1063 if (nextB == currentB
1064 && ((currentA >= lastA) == (nextA >= currentA))
1065 && svg_is_int_step(currentA, nextA)) {
1066 return 1; /* skip to next as it is a straight line */
1067 }
1068 }
1069 }
1070 putc(relChar, fp);
1071 svg_write_number(fp, currentA - lastA);
1072 return 0;
1073 }
1075 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1076 {
1077 int i;
1078 double lastX = 0, lastY = 0;
1079 /* for straight lines <path..> tags take less space than
1080 <line..> tags because of the efficient packing
1081 in the 'd' attribute */
1082 svg_start_tag(fp, "path");
1083 if (!multi)
1084 svg_common_path_attributes(fp, node);
1085 fputs(" d=\"", fp);
1086 /* specification of the 'd' attribute: */
1087 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1088 for (i = 0; i < node->points; i++) {
1089 ArtVpath *vec = node->path + i;
1090 double x = vec->x - LINEOFFSET;
1091 double y = vec->y - LINEOFFSET;
1092 switch (vec->code) {
1093 case ART_MOVETO_OPEN: /* fall-through */
1094 case ART_MOVETO:
1095 putc('M', fp);
1096 svg_write_number(fp, x);
1097 putc(',', fp);
1098 svg_write_number(fp, y);
1099 break;
1100 case ART_LINETO:
1101 /* try optimize filesize by using minimal lineto commands */
1102 /* without introducing rounding errors. */
1103 if (x == lastX) {
1104 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1105 continue;
1106 } else if (y == lastY) {
1107 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1108 continue;
1109 } else {
1110 putc('L', fp);
1111 svg_write_number(fp, x);
1112 putc(',', fp);
1113 svg_write_number(fp, y);
1114 }
1115 break;
1116 case ART_CURVETO: break; /* unsupported */
1117 case ART_END: break; /* nop */
1118 }
1119 lastX = x;
1120 lastY = y;
1121 }
1122 if (node->closed_path)
1123 fputs(" Z", fp);
1124 fputs("\"", fp);
1125 svg_close_tag_empty_node(fp);
1126 }
1128 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1129 {
1130 /* optimize for multiple paths with the same color, penwidth, etc. */
1131 int num = 1;
1132 gfx_node_t *node = *nodeR;
1133 gfx_node_t *next = node->next;
1134 while (next) {
1135 if (next->type != node->type
1136 || next->size != node->size
1137 || next->color != node->color
1138 || next->dash_on != node->dash_on
1139 || next->dash_off != node->dash_off)
1140 break;
1141 next = next->next;
1142 num++;
1143 }
1144 if (num == 1) {
1145 svg_path(fp, node, 0);
1146 return;
1147 }
1148 svg_start_tag(fp, "g");
1149 svg_common_path_attributes(fp, node);
1150 svg_close_tag(fp);
1151 while (num && node) {
1152 svg_path(fp, node, 1);
1153 if (!--num)
1154 break;
1155 node = node->next;
1156 *nodeR = node;
1157 }
1158 svg_end_tag(fp, "g");
1159 }
1161 static void svg_area(FILE *fp, gfx_node_t *node)
1162 {
1163 int i;
1164 double startX = 0, startY = 0;
1165 svg_start_tag(fp, "polygon");
1166 fputs(" ", fp);
1167 svg_write_color(fp, node->color, "fill");
1168 fputs(" points=\"", fp);
1169 for (i = 0; i < node->points; i++) {
1170 ArtVpath *vec = node->path + i;
1171 double x = vec->x - LINEOFFSET;
1172 double y = vec->y - LINEOFFSET;
1173 switch (vec->code) {
1174 case ART_MOVETO_OPEN: /* fall-through */
1175 case ART_MOVETO:
1176 svg_write_number(fp, x);
1177 putc(',', fp);
1178 svg_write_number(fp, y);
1179 startX = x;
1180 startY = y;
1181 break;
1182 case ART_LINETO:
1183 if (i == node->points - 2
1184 && node->path[i + 1].code == ART_END
1185 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1186 break; /* poly area always closed, no need for last point */
1187 }
1188 putc(' ', fp);
1189 svg_write_number(fp, x);
1190 putc(',', fp);
1191 svg_write_number(fp, y);
1192 break;
1193 case ART_CURVETO: break; /* unsupported */
1194 case ART_END: break; /* nop */
1195 }
1196 }
1197 fputs("\"", fp);
1198 svg_close_tag_empty_node(fp);
1199 }
1201 static void svg_text(FILE *fp, gfx_node_t *node)
1202 {
1203 double x = node->x - LINEOFFSET;
1204 double y = node->y - LINEOFFSET;
1205 if (node->angle != 0) {
1206 svg_start_tag(fp, "g");
1207 fputs(" transform=\"translate(", fp);
1208 svg_write_number(fp, x);
1209 fputs(",", fp);
1210 svg_write_number(fp, y);
1211 fputs(") rotate(", fp);
1212 svg_write_number(fp, node->angle);
1213 fputs(")\"", fp);
1214 x = y = 0;
1215 svg_close_tag(fp);
1216 }
1217 switch (node->valign) {
1218 case GFX_V_TOP: y += node->size; break;
1219 case GFX_V_CENTER: y += node->size / 3; break;
1220 case GFX_V_BOTTOM: break;
1221 case GFX_V_NULL: break;
1222 }
1223 svg_start_tag(fp, "text");
1224 fputs(" x=\"", fp);
1225 svg_write_number(fp, x);
1226 fputs("\" y=\"", fp);
1227 svg_write_number(fp, y);
1229 /* if (strcmp(node->filename, svg_default_font))
1230 fprintf(fp, " font-family=\"%s\"", node->filename);
1231 */
1232 fputs("\" font-family=\"Helvetica", fp);
1233 fputs("\" font-size=\"", fp);
1234 svg_write_number(fp, node->size);
1235 fputs("\"", fp);
1236 if (!svg_color_is_black(node->color))
1237 svg_write_color(fp, node->color, "fill");
1238 switch (node->halign) {
1239 case GFX_H_RIGHT: fputs(" text-anchor=\"end\"", fp); break;
1240 case GFX_H_CENTER: fputs(" text-anchor=\"middle\"", fp); break;
1241 case GFX_H_LEFT: break;
1242 case GFX_H_NULL: break;
1243 }
1244 svg_close_tag_single_line(fp);
1245 /* support for node->tabwidth missing */
1246 svg_write_text(fp, node->text);
1247 svg_end_tag(fp, "text");
1248 if (node->angle != 0)
1249 svg_end_tag(fp, "g");
1250 }
1252 int gfx_render_svg (gfx_canvas_t *canvas,
1253 art_u32 width, art_u32 height,
1254 gfx_color_t background, FILE *fp){
1255 gfx_node_t *node = canvas->firstnode;
1256 fputs(
1257 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1258 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1259 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1260 "<!--\n"
1261 " SVG file created by RRDtool,\n"
1262 " Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch\n"
1263 "\n"
1264 " The width/height attributes in the outhermost svg node\n"
1265 " are just default sizes for the browser which is used\n"
1266 " if the svg file is openened directly without being\n"
1267 " embedded in an html file.\n"
1268 " The viewBox is the local coord system for rrdtool.\n"
1269 "-->\n", fp);
1270 svg_start_tag(fp, "svg");
1271 fputs(" width=\"", fp);
1272 svg_write_number(fp, width * canvas->zoom);
1273 fputs("\" height=\"", fp);
1274 svg_write_number(fp, height * canvas->zoom);
1275 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1276 svg_write_number(fp, -LINEOFFSET);
1277 fputs(" ", fp);
1278 svg_write_number(fp, -LINEOFFSET);
1279 fputs(" ", fp);
1280 svg_write_number(fp, width - LINEOFFSET);
1281 fputs(" ", fp);
1282 svg_write_number(fp, height - LINEOFFSET);
1283 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1284 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1285 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1286 svg_close_tag(fp);
1287 svg_start_tag(fp, "rect");
1288 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1289 svg_write_color(fp, background, "fill");
1290 svg_close_tag_empty_node(fp);
1291 while (node) {
1292 switch (node->type) {
1293 case GFX_LINE:
1294 svg_multi_path(fp, &node);
1295 break;
1296 case GFX_AREA:
1297 svg_area(fp, node);
1298 break;
1299 case GFX_TEXT:
1300 svg_text(fp, node);
1301 }
1302 node = node->next;
1303 }
1304 svg_end_tag(fp, "svg");
1305 return 0;
1306 }
1308 /* ------- EPS -------
1309 EPS and Postscript references:
1310 http://partners.adobe.com/asn/developer/technotes/postscript.html
1311 */
1313 typedef struct eps_font
1314 {
1315 const char *ps_font;
1316 int id;
1317 struct eps_font *next;
1318 } eps_font;
1320 typedef struct eps_state
1321 {
1322 FILE *fp;
1323 gfx_canvas_t *canvas;
1324 art_u32 page_width, page_height;
1325 eps_font *font_list;
1326 /*--*/
1327 gfx_color_t color;
1328 const char *font;
1329 double font_size;
1330 double line_width;
1331 int linecap, linejoin;
1332 int has_dash;
1333 } eps_state;
1335 static void eps_set_color(eps_state *state, gfx_color_t color)
1336 {
1337 /* gfx_color_t is RRGGBBAA */
1338 if (state->color == color)
1339 return;
1340 fprintf(state->fp, "%d %d %d Rgb\n",
1341 (int)((color >> 24) & 255),
1342 (int)((color >> 16) & 255),
1343 (int)((color >> 8) & 255));
1344 state->color = color;
1345 }
1347 static int eps_add_font(eps_state *state, gfx_node_t *node)
1348 {
1349 /* The fonts list could be postponed to the end using
1350 (atend), but let's be nice and have them in the header. */
1351 const char *ps_font = afm_get_font_postscript_name(node->filename);
1352 eps_font *ef;
1353 for (ef = state->font_list; ef; ef = ef->next) {
1354 if (!strcmp(ps_font, ef->ps_font))
1355 return 0;
1356 }
1357 ef = malloc(sizeof(eps_font));
1358 if (ef == NULL) {
1359 rrd_set_error("malloc for eps_font");
1360 return -1;
1361 }
1362 ef->next = state->font_list;
1363 ef->ps_font = ps_font;
1364 state->font_list = ef;
1365 return 0;
1366 }
1368 static void eps_list_fonts(eps_state *state, const char *dscName)
1369 {
1370 eps_font *ef;
1371 int lineLen = strlen(dscName);
1372 if (!state->font_list)
1373 return;
1374 fputs(dscName, state->fp);
1375 for (ef = state->font_list; ef; ef = ef->next) {
1376 int nameLen = strlen(ef->ps_font);
1377 if (lineLen + nameLen > 100 && lineLen) {
1378 fputs("\n", state->fp);
1379 fputs("%%- \n", state->fp);
1380 lineLen = 5;
1381 } else {
1382 fputs(" ", state->fp);
1383 lineLen++;
1384 }
1385 fputs(ef->ps_font, state->fp);
1386 lineLen += nameLen;
1387 }
1388 fputs("\n", state->fp);
1389 }
1391 static void eps_define_fonts(eps_state *state)
1392 {
1393 eps_font *ef;
1394 if (!state->font_list)
1395 return;
1396 for (ef = state->font_list; ef; ef = ef->next) {
1397 /* PostScript¨ LANGUAGE REFERENCE third edition
1398 page 349 */
1399 fprintf(state->fp,
1400 "%%\n"
1401 "/%s findfont dup length dict begin\n"
1402 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1403 "/Encoding ISOLatin1Encoding def\n"
1404 "currentdict end\n"
1405 "/%s-ISOLatin1 exch definefont pop\n"
1406 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1407 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1408 }
1409 }
1411 static int eps_prologue(eps_state *state)
1412 {
1413 gfx_node_t *node;
1414 fputs(
1415 "%!PS-Adobe-3.0 EPSF-3.0\n"
1416 "%%Creator: RRDtool 1.2.1 Tobias Oetiker, http://tobi.oetiker.ch\n"
1417 /* can't like weird chars here */
1418 "%%Title: (RRDtool output)\n"
1419 "%%DocumentData: Clean7Bit\n"
1420 "", state->fp);
1421 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1422 state->page_width, state->page_height);
1423 for (node = state->canvas->firstnode; node; node = node->next) {
1424 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1425 return -1;
1426 }
1427 eps_list_fonts(state, "%%DocumentFonts:");
1428 eps_list_fonts(state, "%%DocumentNeededFonts:");
1429 fputs(
1430 "%%EndComments\n"
1431 "%%BeginProlog\n"
1432 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1433 "/bd { bind def } bind def\n"
1434 "", state->fp);
1435 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1436 fputs(
1437 "/X2 {X exch X exch} bd\n"
1438 "/M {X2 moveto} bd\n"
1439 "/L {X2 lineto} bd\n"
1440 "/m {moveto} bd\n"
1441 "/l {lineto} bd\n"
1442 "/S {stroke} bd\n"
1443 "/CP {closepath} bd\n"
1444 "/WS {setlinewidth stroke} bd\n"
1445 "/F {fill} bd\n"
1446 "/TaL { } bd\n"
1447 "/TaC {dup stringwidth pop neg 2 div 0 rmoveto } bd\n"
1448 "/TaR {dup stringwidth pop neg 0 rmoveto } bd\n"
1449 "/TL {moveto TaL show} bd\n"
1450 "/TC {moveto TaC show} bd\n"
1451 "/TR {moveto TaR show} bd\n"
1452 "/Rgb { 255.0 div 3 1 roll\n"
1453 " 255.0 div 3 1 roll \n"
1454 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1455 "", state->fp);
1456 eps_define_fonts(state);
1457 return 0;
1458 }
1460 static void eps_clear_dash(eps_state *state)
1461 {
1462 if (!state->has_dash)
1463 return;
1464 state->has_dash = 0;
1465 fputs("[1 0] 0 setdash\n", state->fp);
1466 }
1468 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1469 {
1470 int i;
1471 FILE *fp = state->fp;
1472 int useOffset = 0;
1473 int clearDashIfAny = 1;
1474 eps_set_color(state, node->color);
1475 if (node->type == GFX_LINE) {
1476 svg_dash dash_info;
1477 if (state->linecap != 1) {
1478 fputs("1 setlinecap\n", fp);
1479 state->linecap = 1;
1480 }
1481 if (state->linejoin != 1) {
1482 fputs("1 setlinejoin\n", fp);
1483 state->linejoin = 1;
1484 }
1485 svg_get_dash(node, &dash_info);
1486 if (dash_info.dash_enable) {
1487 clearDashIfAny = 0;
1488 state->has_dash = 1;
1489 fputs("[", fp);
1490 svg_write_number(fp, dash_info.adjusted_on);
1491 fputs(" ", fp);
1492 svg_write_number(fp, dash_info.adjusted_off);
1493 fputs("] ", fp);
1494 svg_write_number(fp, dash_info.dash_offset);
1495 fputs(" setdash\n", fp);
1496 }
1497 }
1498 if (clearDashIfAny)
1499 eps_clear_dash(state);
1500 for (i = 0; i < node->points; i++) {
1501 ArtVpath *vec = node->path + i;
1502 double x = vec->x;
1503 double y = state->page_height - vec->y;
1504 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1505 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1506 if (useOffset) {
1507 x -= LINEOFFSET;
1508 y -= LINEOFFSET;
1509 }
1510 switch (vec->code) {
1511 case ART_MOVETO_OPEN: /* fall-through */
1512 case ART_MOVETO:
1513 svg_write_number(fp, x);
1514 fputc(' ', fp);
1515 svg_write_number(fp, y);
1516 fputc(' ', fp);
1517 fputs(useOffset ? "M\n" : "m\n", fp);
1518 break;
1519 case ART_LINETO:
1520 svg_write_number(fp, x);
1521 fputc(' ', fp);
1522 svg_write_number(fp, y);
1523 fputc(' ', fp);
1524 fputs(useOffset ? "L\n" : "l\n", fp);
1525 break;
1526 case ART_CURVETO: break; /* unsupported */
1527 case ART_END: break; /* nop */
1528 }
1529 }
1530 if (node->type == GFX_LINE) {
1531 if (node->closed_path)
1532 fputs("CP ", fp);
1533 if (node->size != state->line_width) {
1534 state->line_width = node->size;
1535 svg_write_number(fp, state->line_width);
1536 fputs(" WS\n", fp);
1537 } else {
1538 fputs("S\n", fp);
1539 }
1540 } else {
1541 fputs("F\n", fp);
1542 }
1543 }
1545 static void eps_write_text(eps_state *state, gfx_node_t *node)
1546 {
1547 FILE *fp = state->fp;
1548 const unsigned char *p;
1549 const char *ps_font = afm_get_font_postscript_name(node->filename);
1550 char align = 'L';
1551 double x = node->x;
1552 double y = state->page_height - node->y, ydelta = 0;
1553 int lineLen = 0;
1554 eps_set_color(state, node->color);
1555 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1556 state->font = ps_font;
1557 state->font_size = node->size;
1558 svg_write_number(fp, state->font_size);
1559 fprintf(fp, " SetFont-%s\n", state->font);
1560 }
1561 fputs("(", fp);
1562 lineLen = 20;
1563 for (p = (const unsigned char*)node->text; *p; p++) {
1564 if (lineLen > 70) {
1565 fputs("\\\n", fp); /* backslash and \n */
1566 lineLen = 0;
1567 }
1568 switch (*p) {
1569 case '(':
1570 case ')':
1571 case '\\':
1572 case '\n':
1573 case '\r':
1574 case '\t':
1575 fputc('\\', fp);
1576 lineLen++;
1577 /* fall-through */
1578 default:
1579 if (*p >= 126)
1580 fprintf(fp, "\\%03o", *p);
1581 else
1582 fputc(*p, fp);
1583 lineLen++;
1584 }
1585 }
1586 fputs(") ", fp);
1587 switch(node->valign){
1588 case GFX_V_TOP: ydelta = -node->size; break;
1589 case GFX_V_CENTER: ydelta = -node->size / 3.0; break;
1590 case GFX_V_BOTTOM: break;
1591 case GFX_V_NULL: break;
1592 }
1593 if (node->angle == 0)
1594 y += ydelta;
1595 switch (node->halign) {
1596 case GFX_H_RIGHT: align = 'R'; break;
1597 case GFX_H_CENTER: align = 'C'; break;
1598 case GFX_H_LEFT: align= 'L'; break;
1599 case GFX_H_NULL: align= 'L'; break;
1600 }
1601 if (node->angle != 0) {
1602 fputs("\n", fp);
1603 fputs(" gsave ", fp);
1604 svg_write_number(fp, x);
1605 fputc(' ', fp);
1606 svg_write_number(fp, y);
1607 fputs(" translate ", fp);
1608 svg_write_number(fp, -node->angle);
1609 fputs(" rotate 0 ", fp);
1610 svg_write_number(fp, ydelta);
1611 fputs(" moveto ", fp);
1612 fprintf(fp, "Ta%c", align);
1613 fputs(" show grestore\n", fp);
1614 } else {
1615 svg_write_number(fp, x);
1616 fputc(' ', fp);
1617 svg_write_number(fp, y);
1618 fputs(" T", fp);
1619 fputc(align, fp);
1620 fputc('\n', fp);
1621 }
1622 }
1624 static int eps_write_content(eps_state *state)
1625 {
1626 gfx_node_t *node;
1627 fputs("%\n", state->fp);
1628 for (node = state->canvas->firstnode; node; node = node->next) {
1629 switch (node->type) {
1630 case GFX_LINE:
1631 case GFX_AREA:
1632 eps_write_linearea(state, node);
1633 break;
1634 case GFX_TEXT:
1635 eps_write_text(state, node);
1636 break;
1637 }
1638 }
1639 return 0;
1640 }
1642 int gfx_render_eps (gfx_canvas_t *canvas,
1643 art_u32 width, art_u32 height,
1644 gfx_color_t background, FILE *fp){
1645 struct eps_state state;
1646 state.fp = fp;
1647 state.canvas = canvas;
1648 state.page_width = width;
1649 state.page_height = height;
1650 state.font = "no-default-font";
1651 state.font_size = -1;
1652 state.color = 0; /* black */
1653 state.font_list = NULL;
1654 state.linecap = -1;
1655 state.linejoin = -1;
1656 state.has_dash = 0;
1657 if (eps_prologue(&state) == -1)
1658 return -1;
1659 eps_set_color(&state, background);
1660 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1661 height, width, height, width);
1662 if (eps_write_content(&state) == -1)
1663 return 0;
1664 fputs("showpage\n", fp);
1665 fputs("%%EOF\n", fp);
1666 while (state.font_list) {
1667 eps_font *next = state.font_list->next;
1668 free(state.font_list);
1669 state.font_list = next;
1670 }
1671 return 0;
1672 }
1674 /* ------- PDF -------
1675 PDF references page:
1676 http://partners.adobe.com/asn/developer/technotes/acrobatpdf.html
1677 */
1679 typedef struct pdf_buffer
1680 {
1681 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1682 char *data;
1683 int alloc_size, current_size;
1684 struct pdf_buffer *previous_buffer, *next_buffer;
1685 struct pdf_state *state;
1686 } pdf_buffer;
1688 typedef struct pdf_font
1689 {
1690 const char *ps_font;
1691 pdf_buffer obj;
1692 struct pdf_font *next;
1693 } pdf_font;
1695 typedef struct pdf_state
1696 {
1697 FILE *fp;
1698 gfx_canvas_t *canvas;
1699 art_u32 page_width, page_height;
1700 pdf_font *font_list;
1701 pdf_buffer *first_buffer, *last_buffer;
1702 int pdf_file_pos;
1703 int has_failed;
1704 /*--*/
1705 gfx_color_t stroke_color, fill_color;
1706 int font_id;
1707 double font_size;
1708 double line_width;
1709 svg_dash dash;
1710 int linecap, linejoin;
1711 int last_obj_id;
1712 /*--*/
1713 pdf_buffer pdf_header;
1714 pdf_buffer catalog_obj, pages_obj, page1_obj;
1715 pdf_buffer fontsdict_obj;
1716 pdf_buffer graph_stream;
1717 } pdf_state;
1719 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1720 {
1721 int initial_size = 32;
1722 buf->state = state;
1723 buf->id = -42;
1724 buf->alloc_size = 0;
1725 buf->current_size = 0;
1726 buf->data = (char*)malloc(initial_size);
1727 buf->is_obj = 0;
1728 buf->previous_buffer = NULL;
1729 buf->next_buffer = NULL;
1730 if (buf->data == NULL) {
1731 rrd_set_error("malloc for pdf_buffer data");
1732 state->has_failed = 1;
1733 return;
1734 }
1735 buf->alloc_size = initial_size;
1736 if (state->last_buffer)
1737 state->last_buffer->next_buffer = buf;
1738 if (state->first_buffer == NULL)
1739 state->first_buffer = buf;
1740 buf->previous_buffer = state->last_buffer;
1741 state->last_buffer = buf;
1742 }
1744 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1745 {
1746 if (len <= 0)
1747 return;
1748 if (buf->alloc_size < buf->current_size + len) {
1749 int new_size = buf->alloc_size;
1750 char *new_buf;
1751 while (new_size < buf->current_size + len)
1752 new_size *= 4;
1753 new_buf = (char*)malloc(new_size);
1754 if (new_buf == NULL) {
1755 rrd_set_error("re-malloc for pdf_buffer data");
1756 buf->state->has_failed = 1;
1757 return;
1758 }
1759 memcpy(new_buf, buf->data, buf->current_size);
1760 free(buf->data);
1761 buf->data = new_buf;
1762 buf->alloc_size = new_size;
1763 }
1764 memcpy(buf->data + buf->current_size, text, len);
1765 buf->current_size += len;
1766 }
1768 static void pdf_puts(pdf_buffer *buf, const char *text)
1769 {
1770 pdf_put(buf, text, strlen(text));
1771 }
1773 static void pdf_indent(pdf_buffer *buf)
1774 {
1775 pdf_puts(buf, "\t");
1776 }
1778 static void pdf_putsi(pdf_buffer *buf, const char *text)
1779 {
1780 pdf_indent(buf);
1781 pdf_puts(buf, text);
1782 }
1784 static void pdf_putint(pdf_buffer *buf, int i)
1785 {
1786 char tmp[20];
1787 sprintf(tmp, "%d", i);
1788 pdf_puts(buf, tmp);
1789 }
1791 static void pdf_putnumber(pdf_buffer *buf, double d)
1792 {
1793 char tmp[50];
1794 svg_format_number(tmp, sizeof(tmp), d);
1795 pdf_puts(buf, tmp);
1796 }
1798 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
1799 {
1800 pdf_init_buffer(state, buf);
1801 buf->id = ++state->last_obj_id;
1802 buf->is_obj = 1;
1803 buf->is_stream = 0;
1804 }
1806 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
1807 {
1808 pdf_init_object(state, buf);
1809 buf->is_dict = 1;
1810 }
1812 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
1813 gfx_color_t *current_color, const char *op)
1814 {
1815 /* gfx_color_t is RRGGBBAA */
1816 if (*current_color == color)
1817 return;
1818 pdf_putnumber(buf, ((color >> 24) & 255) / 255.0);
1819 pdf_puts(buf, " ");
1820 pdf_putnumber(buf, ((color >> 16) & 255) / 255.0);
1821 pdf_puts(buf, " ");
1822 pdf_putnumber(buf, ((color >> 8) & 255) / 255.0);
1823 pdf_puts(buf, " ");
1824 pdf_puts(buf, op);
1825 pdf_puts(buf, "\n");
1826 *current_color = color;
1827 }
1829 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
1830 {
1831 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
1832 }
1834 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
1835 {
1836 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
1837 }
1839 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
1840 {
1841 const char *ps_font = afm_get_font_postscript_name(node->filename);
1842 pdf_font *ef;
1843 for (ef = state->font_list; ef; ef = ef->next) {
1844 if (!strcmp(ps_font, ef->ps_font))
1845 return ef;
1846 }
1847 return NULL;
1848 }
1850 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
1851 {
1852 pdf_font *ef = pdf_find_font(state, node);
1853 if (ef)
1854 return;
1855 ef = malloc(sizeof(pdf_font));
1856 if (ef == NULL) {
1857 rrd_set_error("malloc for pdf_font");
1858 state->has_failed = 1;
1859 return;
1860 }
1861 pdf_init_dict(state, &ef->obj);
1862 ef->next = state->font_list;
1863 ef->ps_font = afm_get_font_postscript_name(node->filename);
1864 state->font_list = ef;
1865 /* fonts dict */
1866 pdf_putsi(&state->fontsdict_obj, "/F");
1867 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1868 pdf_puts(&state->fontsdict_obj, " ");
1869 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1870 pdf_puts(&state->fontsdict_obj, " 0 R\n");
1871 /* fonts def */
1872 pdf_putsi(&ef->obj, "/Type /Font\n");
1873 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
1874 pdf_putsi(&ef->obj, "/Name /F");
1875 pdf_putint(&ef->obj, ef->obj.id);
1876 pdf_puts(&ef->obj, "\n");
1877 pdf_putsi(&ef->obj, "/BaseFont /");
1878 pdf_puts(&ef->obj, ef->ps_font);
1879 pdf_puts(&ef->obj, "\n");
1880 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
1881 /* 'Cp1252' (this is latin 1 extended with 27 characters;
1882 the encoding is also known as 'winansi')
1883 http://www.lowagie.com/iText/tutorial/ch09.html */
1884 }
1886 static void pdf_create_fonts(pdf_state *state)
1887 {
1888 gfx_node_t *node;
1889 for (node = state->canvas->firstnode; node; node = node->next) {
1890 if (node->type == GFX_TEXT)
1891 pdf_add_font(state, node);
1892 }
1893 }
1895 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
1896 {
1897 int i;
1898 pdf_buffer *s = &state->graph_stream;
1899 if (node->type == GFX_LINE) {
1900 svg_dash dash_info;
1901 svg_get_dash(node, &dash_info);
1902 if (!svg_dash_equal(&dash_info, &state->dash)) {
1903 state->dash = dash_info;
1904 if (dash_info.dash_enable) {
1905 pdf_puts(s, "[");
1906 pdf_putnumber(s, dash_info.adjusted_on);
1907 pdf_puts(s, " ");
1908 pdf_putnumber(s, dash_info.adjusted_off);
1909 pdf_puts(s, "] ");
1910 pdf_putnumber(s, dash_info.dash_offset);
1911 pdf_puts(s, " d\n");
1912 } else {
1913 pdf_puts(s, "[] 0 d\n");
1914 }
1915 }
1916 pdf_set_stroke_color(s, node->color);
1917 if (state->linecap != 1) {
1918 pdf_puts(s, "1 j\n");
1919 state->linecap = 1;
1920 }
1921 if (state->linejoin != 1) {
1922 pdf_puts(s, "1 J\n");
1923 state->linejoin = 1;
1924 }
1925 if (node->size != state->line_width) {
1926 state->line_width = node->size;
1927 pdf_putnumber(s, state->line_width);
1928 pdf_puts(s, " w\n");
1929 }
1930 } else {
1931 pdf_set_fill_color(s, node->color);
1932 }
1933 for (i = 0; i < node->points; i++) {
1934 ArtVpath *vec = node->path + i;
1935 double x = vec->x;
1936 double y = state->page_height - vec->y;
1937 if (node->type == GFX_AREA) {
1938 x += LINEOFFSET; /* adjust for libart handling of areas */
1939 y -= LINEOFFSET;
1940 }
1941 switch (vec->code) {
1942 case ART_MOVETO_OPEN: /* fall-through */
1943 case ART_MOVETO:
1944 pdf_putnumber(s, x);
1945 pdf_puts(s, " ");
1946 pdf_putnumber(s, y);
1947 pdf_puts(s, " m\n");
1948 break;
1949 case ART_LINETO:
1950 pdf_putnumber(s, x);
1951 pdf_puts(s, " ");
1952 pdf_putnumber(s, y);
1953 pdf_puts(s, " l\n");
1954 break;
1955 case ART_CURVETO: break; /* unsupported */
1956 case ART_END: break; /* nop */
1957 }
1958 }
1959 if (node->type == GFX_LINE) {
1960 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
1961 } else {
1962 pdf_puts(s, "f\n");
1963 }
1964 }
1966 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
1967 int last_was_text, int next_is_text)
1968 {
1969 char tmp[30];
1970 pdf_buffer *s = &state->graph_stream;
1971 const unsigned char *p;
1972 pdf_font *font = pdf_find_font(state, node);
1973 double x = node->x;
1974 double y = state->page_height - node->y;
1975 double dx = 0, dy = 0;
1976 double cos_a = 0, sin_a = 0;
1977 if (font == NULL) {
1978 rrd_set_error("font disappeared");
1979 state->has_failed = 1;
1980 return;
1981 }
1982 switch(node->valign){
1983 case GFX_V_TOP: dy = -node->size; break;
1984 case GFX_V_CENTER: dy = -node->size / 3.0; break;
1985 case GFX_V_BOTTOM: break;
1986 case GFX_V_NULL: break;
1987 }
1988 switch (node->halign) {
1989 case GFX_H_RIGHT: dx = -afm_get_text_width(0, font->ps_font,
1990 node->size, node->tabwidth, node->text);
1991 break;
1992 case GFX_H_CENTER: dx = -afm_get_text_width(0, font->ps_font,
1993 node->size, node->tabwidth, node->text) / 2;
1994 break;
1995 case GFX_H_LEFT: break;
1996 case GFX_H_NULL: break;
1997 }
1998 pdf_set_fill_color(s, node->color);
1999 if (node->angle != 0) {
2000 double a = 2 * M_PI * -node->angle / 360.0;
2001 double new_x, new_y;
2002 cos_a = cos(a);
2003 sin_a = sin(a);
2004 new_x = cos_a * dx - sin_a * dy + x;
2005 new_y = sin_a * dx + cos_a * dy + y;
2006 x = new_x;
2007 y = new_y;
2008 } else {
2009 x += dx;
2010 y += dy;
2011 }
2012 if (!last_was_text)
2013 pdf_puts(s, "BT\n");
2014 if (state->font_id != font->obj.id || node->size != state->font_size) {
2015 state->font_id = font->obj.id;
2016 state->font_size = node->size;
2017 pdf_puts(s, "/F");
2018 pdf_putint(s, font->obj.id);
2019 pdf_puts(s, " ");
2020 pdf_putnumber(s, node->size);
2021 pdf_puts(s, " Tf\n");
2022 }
2023 if (node->angle == 0) {
2024 pdf_puts(s, "1 0 0 1 ");
2025 } else {
2026 pdf_putnumber(s, cos_a);
2027 pdf_puts(s, " ");
2028 pdf_putnumber(s, sin_a);
2029 pdf_puts(s, " ");
2030 pdf_putnumber(s, -sin_a);
2031 pdf_puts(s, " ");
2032 pdf_putnumber(s, cos_a);
2033 pdf_puts(s, " ");
2034 }
2035 pdf_putnumber(s, x);
2036 pdf_puts(s, " ");
2037 pdf_putnumber(s, y);
2038 pdf_puts(s, " Tm\n");
2039 pdf_puts(s, "(");
2040 for (p = (const unsigned char*)node->text; *p; p++) {
2041 switch (*p) {
2042 case '(':
2043 case ')':
2044 case '\\':
2045 case '\n':
2046 case '\r':
2047 case '\t':
2048 pdf_puts(s, "\\");
2049 /* fall-through */
2050 default:
2051 if (*p >= 126) {
2052 snprintf(tmp, sizeof(tmp), "\\%03o", *p);
2053 pdf_puts(s, tmp);
2054 } else {
2055 pdf_put(s, (const char*)p, 1);
2056 }
2057 }
2058 }
2059 pdf_puts(s, ") Tj\n");
2060 if (!next_is_text)
2061 pdf_puts(s, "ET\n");
2062 }
2064 static void pdf_write_content(pdf_state *state)
2065 {
2066 gfx_node_t *node;
2067 int last_was_text = 0, next_is_text;
2068 for (node = state->canvas->firstnode; node; node = node->next) {
2069 switch (node->type) {
2070 case GFX_LINE:
2071 case GFX_AREA:
2072 pdf_write_linearea(state, node);
2073 break;
2074 case GFX_TEXT:
2075 next_is_text = node->next && node->next->type == GFX_TEXT;
2076 pdf_write_text(state, node, last_was_text, next_is_text);
2077 break;
2078 }
2079 last_was_text = node->type == GFX_TEXT;
2080 }
2081 }
2083 static void pdf_init_document(pdf_state *state)
2084 {
2085 pdf_init_buffer(state, &state->pdf_header);
2086 pdf_init_dict(state, &state->catalog_obj);
2087 pdf_init_dict(state, &state->pages_obj);
2088 pdf_init_dict(state, &state->page1_obj);
2089 pdf_init_dict(state, &state->fontsdict_obj);
2090 pdf_create_fonts(state);
2091 if (state->has_failed)
2092 return;
2093 /* make stream last object in file */
2094 pdf_init_object(state, &state->graph_stream);
2095 state->graph_stream.is_stream = 1;
2096 }
2098 static void pdf_setup_document(pdf_state *state)
2099 {
2100 /* all objects created by now, so init code can reference them */
2101 /* HEADER */
2102 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2103 /* following 8 bit comment is recommended by Adobe for
2104 indicating binary file to file transfer applications */
2105 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2106 /* CATALOG */
2107 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2108 pdf_putsi(&state->catalog_obj, "/Pages ");
2109 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2110 pdf_puts(&state->catalog_obj, " 0 R\n");
2111 /* PAGES */
2112 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2113 pdf_putsi(&state->pages_obj, "/Kids [");
2114 pdf_putint(&state->pages_obj, state->page1_obj.id);
2115 pdf_puts(&state->pages_obj, " 0 R]\n");
2116 pdf_putsi(&state->pages_obj, "/Count 1\n");
2117 /* PAGE 1 */
2118 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2119 pdf_putsi(&state->page1_obj, "/Parent ");
2120 pdf_putint(&state->page1_obj, state->pages_obj.id);
2121 pdf_puts(&state->page1_obj, " 0 R\n");
2122 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2123 pdf_putint(&state->page1_obj, state->page_width);
2124 pdf_puts(&state->page1_obj, " ");
2125 pdf_putint(&state->page1_obj, state->page_height);
2126 pdf_puts(&state->page1_obj, "]\n");
2127 pdf_putsi(&state->page1_obj, "/Contents ");
2128 pdf_putint(&state->page1_obj, state->graph_stream.id);
2129 pdf_puts(&state->page1_obj, " 0 R\n");
2130 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2131 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2132 pdf_puts(&state->page1_obj, " 0 R >>\n");
2133 }
2135 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2136 {
2137 fputs(text, state->fp);
2138 state->pdf_file_pos += strlen(text);
2139 }
2141 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2142 {
2143 char tmp[40];
2144 buf->pdf_file_pos = state->pdf_file_pos;
2145 if (buf->is_obj) {
2146 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2147 pdf_write_string_to_file(state, tmp);
2148 }
2149 if (buf->is_dict)
2150 pdf_write_string_to_file(state, "<<\n");
2151 if (buf->is_stream) {
2152 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2153 pdf_write_string_to_file(state, tmp);
2154 pdf_write_string_to_file(state, "stream\n");
2155 }
2156 fwrite(buf->data, 1, buf->current_size, state->fp);
2157 state->pdf_file_pos += buf->current_size;
2158 if (buf->is_stream)
2159 pdf_write_string_to_file(state, "endstream\n");
2160 if (buf->is_dict)
2161 pdf_write_string_to_file(state, ">>\n");
2162 if (buf->is_obj)
2163 pdf_write_string_to_file(state, "endobj\n");
2164 }
2166 static void pdf_write_to_file(pdf_state *state)
2167 {
2168 pdf_buffer *buf = state->first_buffer;
2169 int xref_pos;
2170 state->pdf_file_pos = 0;
2171 pdf_write_buf_to_file(state, &state->pdf_header);
2172 while (buf) {
2173 if (buf->is_obj)
2174 pdf_write_buf_to_file(state, buf);
2175 buf = buf->next_buffer;
2176 }
2177 xref_pos = state->pdf_file_pos;
2178 fprintf(state->fp, "xref\n");
2179 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2180 /* TOC lines must be exactly 20 bytes including \n */
2181 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2182 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2183 if (buf->is_obj)
2184 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2185 }
2186 fprintf(state->fp, "trailer\n");
2187 fprintf(state->fp, "<<\n");
2188 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2189 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2190 fprintf(state->fp, ">>\n");
2191 fprintf(state->fp, "startxref\n");
2192 fprintf(state->fp, "%d\n", xref_pos);
2193 fputs("%%EOF\n", state->fp);
2194 }
2196 static void pdf_free_resources(pdf_state *state)
2197 {
2198 pdf_buffer *buf = state->first_buffer;
2199 while (buf) {
2200 free(buf->data);
2201 buf->data = NULL;
2202 buf->alloc_size = buf->current_size = 0;
2203 buf = buf->next_buffer;
2204 }
2205 while (state->font_list) {
2206 pdf_font *next = state->font_list->next;
2207 free(state->font_list);
2208 state->font_list = next;
2209 }
2210 }
2212 int gfx_render_pdf (gfx_canvas_t *canvas,
2213 art_u32 width, art_u32 height,
2214 gfx_color_t background, FILE *fp){
2215 struct pdf_state state;
2216 memset(&state, 0, sizeof(pdf_state));
2217 state.fp = fp;
2218 state.canvas = canvas;
2219 state.page_width = width;
2220 state.page_height = height;
2221 state.font_id = -1;
2222 state.font_size = -1;
2223 state.font_list = NULL;
2224 state.linecap = -1;
2225 state.linejoin = -1;
2226 pdf_init_document(&state);
2227 /*
2228 pdf_set_color(&state, background);
2229 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2230 height, width, height, width);
2231 */
2232 if (!state.has_failed)
2233 pdf_write_content(&state);
2234 if (!state.has_failed)
2235 pdf_setup_document(&state);
2236 if (!state.has_failed)
2237 pdf_write_to_file(&state);
2238 pdf_free_resources(&state);
2239 return state.has_failed ? -1 : 0;
2240 }