86d2b564c66f9ea6638627ef17cee81f1586883d
1 /****************************************************************************
2 * RRDtool 1.2.4 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 #define USE_PDF_FAKE_ALPHA 1
27 #define USE_EPS_FAKE_ALPHA 1
29 typedef struct gfx_char_s *gfx_char;
30 struct gfx_char_s {
31 FT_UInt index; /* glyph index */
32 FT_Vector pos; /* location from baseline in 26.6 */
33 FT_Glyph image; /* glyph bitmap */
34 };
36 typedef struct gfx_string_s *gfx_string;
37 struct gfx_string_s {
38 unsigned int width;
39 unsigned int height;
40 size_t count; /* number of characters */
41 gfx_char glyphs;
42 size_t num_glyphs;
43 FT_BBox bbox;
44 FT_Matrix transform;
45 };
47 /* compute string bbox */
48 static void compute_string_bbox(gfx_string string);
50 /* create a freetype glyph string */
51 gfx_string gfx_string_create ( gfx_canvas_t *canvas, FT_Face face,
52 const char *text, int rotation, double tabwidth, double size);
54 /* create a freetype glyph string */
55 static void gfx_string_destroy ( gfx_string string );
57 static
58 gfx_node_t *gfx_new_node( gfx_canvas_t *canvas,enum gfx_en type){
59 gfx_node_t *node = art_new(gfx_node_t,1);
60 if (node == NULL) return NULL;
61 node->type = type;
62 node->color = 0x0; /* color of element 0xRRGGBBAA alpha 0xff is solid*/
63 node->size =0.0; /* font size, line width */
64 node->path = NULL; /* path */
65 node->points = 0;
66 node->points_max =0;
67 node->closed_path = 0;
68 node->filename = NULL; /* font or image filename */
69 node->text = NULL;
70 node->x = 0.0;
71 node->y = 0.0; /* position */
72 node->angle = 0;
73 node->halign = GFX_H_NULL; /* text alignement */
74 node->valign = GFX_V_NULL; /* text alignement */
75 node->tabwidth = 0.0;
76 node->next = NULL;
77 if (canvas->lastnode != NULL){
78 canvas->lastnode->next = node;
79 }
80 if (canvas->firstnode == NULL){
81 canvas->firstnode = node;
82 }
83 canvas->lastnode = node;
84 return node;
85 }
87 gfx_canvas_t *gfx_new_canvas (void) {
88 gfx_canvas_t *canvas = art_new(gfx_canvas_t,1);
89 canvas->firstnode = NULL;
90 canvas->lastnode = NULL;
91 canvas->imgformat = IF_PNG; /* we default to PNG output */
92 canvas->interlaced = 0;
93 canvas->zoom = 1.0;
94 canvas->font_aa_threshold = -1.0;
95 canvas->aa_type = AA_NORMAL;
96 return canvas;
97 }
99 /* create a new line */
100 gfx_node_t *gfx_new_line(gfx_canvas_t *canvas,
101 double X0, double Y0,
102 double X1, double Y1,
103 double width, gfx_color_t color){
104 return gfx_new_dashed_line(canvas, X0, Y0, X1, Y1, width, color, 0, 0);
105 }
107 gfx_node_t *gfx_new_dashed_line(gfx_canvas_t *canvas,
108 double X0, double Y0,
109 double X1, double Y1,
110 double width, gfx_color_t color,
111 double dash_on, double dash_off){
113 gfx_node_t *node;
114 ArtVpath *vec;
115 node = gfx_new_node(canvas,GFX_LINE);
116 if (node == NULL) return NULL;
117 vec = art_new(ArtVpath, 3);
118 if (vec == NULL) return NULL;
119 vec[0].code = ART_MOVETO_OPEN; vec[0].x=X0+LINEOFFSET; vec[0].y=Y0+LINEOFFSET;
120 vec[1].code = ART_LINETO; vec[1].x=X1+LINEOFFSET; vec[1].y=Y1+LINEOFFSET;
121 vec[2].code = ART_END; vec[2].x=0;vec[2].y=0;
123 node->points = 3;
124 node->points_max = 3;
125 node->color = color;
126 node->size = width;
127 node->dash_on = dash_on;
128 node->dash_off = dash_off;
129 node->path = vec;
130 return node;
131 }
133 /* create a new area */
134 gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,
135 double X0, double Y0,
136 double X1, double Y1,
137 double X2, double Y2,
138 gfx_color_t color) {
140 gfx_node_t *node;
141 ArtVpath *vec;
142 node = gfx_new_node(canvas,GFX_AREA);
143 if (node == NULL) return NULL;
144 vec = art_new(ArtVpath, 5);
145 if (vec == NULL) return NULL;
146 vec[0].code = ART_MOVETO; vec[0].x=X0; vec[0].y=Y0;
147 vec[1].code = ART_LINETO; vec[1].x=X1; vec[1].y=Y1;
148 vec[2].code = ART_LINETO; vec[2].x=X2; vec[2].y=Y2;
149 vec[3].code = ART_LINETO; vec[3].x=X0; vec[3].y=Y0;
150 vec[4].code = ART_END; vec[4].x=0; vec[4].y=0;
152 node->points = 5;
153 node->points_max = 5;
154 node->color = color;
155 node->path = vec;
157 return node;
158 }
160 /* add a point to a line or to an area */
161 int gfx_add_point (gfx_node_t *node,
162 double x, double y){
163 if (node == NULL) return 1;
164 if (node->type == GFX_AREA) {
165 double X0 = node->path[0].x;
166 double Y0 = node->path[0].y;
167 node->points -= 2;
168 art_vpath_add_point (&(node->path),
169 &(node->points),
170 &(node->points_max),
171 ART_LINETO,
172 x,y);
173 art_vpath_add_point (&(node->path),
174 &(node->points),
175 &(node->points_max),
176 ART_LINETO,
177 X0,Y0);
178 art_vpath_add_point (&(node->path),
179 &(node->points),
180 &(node->points_max),
181 ART_END,
182 0,0);
183 } else if (node->type == GFX_LINE) {
184 node->points -= 1;
185 art_vpath_add_point (&(node->path),
186 &(node->points),
187 &(node->points_max),
188 ART_LINETO,
189 x+LINEOFFSET,y+LINEOFFSET);
190 art_vpath_add_point (&(node->path),
191 &(node->points),
192 &(node->points_max),
193 ART_END,
194 0,0);
196 } else {
197 /* can only add point to areas and lines */
198 return 1;
199 }
200 return 0;
201 }
203 void gfx_close_path (gfx_node_t *node) {
204 node->closed_path = 1;
205 if (node->path[0].code == ART_MOVETO_OPEN)
206 node->path[0].code = ART_MOVETO;
207 }
209 /* create a text node */
210 gfx_node_t *gfx_new_text (gfx_canvas_t *canvas,
211 double x, double y, gfx_color_t color,
212 char* font, double size,
213 double tabwidth, double angle,
214 enum gfx_h_align_en h_align,
215 enum gfx_v_align_en v_align,
216 char* text){
217 gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT);
219 node->text = strdup(text);
220 node->size = size;
221 node->filename = strdup(font);
222 node->x = x;
223 node->y = y;
224 node->angle = angle;
225 node->color = color;
226 node->tabwidth = tabwidth;
227 node->halign = h_align;
228 node->valign = v_align;
229 #if 0
230 /* debugging: show text anchor
231 green is along x-axis, red is downward y-axis */
232 if (1) {
233 double a = 2 * M_PI * -node->angle / 360.0;
234 double cos_a = cos(a);
235 double sin_a = sin(a);
236 double len = 3;
237 gfx_new_line(canvas,
238 x, y,
239 x + len * cos_a, y - len * sin_a,
240 0.2, 0x00FF0000);
241 gfx_new_line(canvas,
242 x, y,
243 x + len * sin_a, y + len * cos_a,
244 0.2, 0xFF000000);
245 }
246 #endif
247 return node;
248 }
250 int gfx_render(gfx_canvas_t *canvas,
251 art_u32 width, art_u32 height,
252 gfx_color_t background, FILE *fp){
253 switch (canvas->imgformat) {
254 case IF_PNG:
255 return gfx_render_png (canvas, width, height, background, fp);
256 case IF_SVG:
257 return gfx_render_svg (canvas, width, height, background, fp);
258 case IF_EPS:
259 return gfx_render_eps (canvas, width, height, background, fp);
260 case IF_PDF:
261 return gfx_render_pdf (canvas, width, height, background, fp);
262 default:
263 return -1;
264 }
265 }
267 static void gfx_string_destroy ( gfx_string string ) {
268 unsigned int n;
269 if (string->glyphs) {
270 for (n=0; n<string->num_glyphs; ++n)
271 FT_Done_Glyph (string->glyphs[n].image);
272 free (string->glyphs);
273 }
274 free (string);
275 }
278 double gfx_get_text_width ( gfx_canvas_t *canvas,
279 double start, char* font, double size,
280 double tabwidth, char* text, int rotation){
281 switch (canvas->imgformat) {
282 case IF_PNG:
283 return gfx_get_text_width_libart (canvas, start, font, size, tabwidth, text, rotation);
284 case IF_SVG: /* fall through */
285 case IF_EPS:
286 case IF_PDF:
287 return afm_get_text_width(start, font, size, tabwidth, text);
288 default:
289 return size * strlen(text);
290 }
291 }
293 double gfx_get_text_width_libart (
294 gfx_canvas_t *canvas, double start, char* font, double size,
295 double tabwidth, char* text, int rotation ){
297 int error;
298 double text_width=0;
299 FT_Face face;
300 FT_Library library=NULL;
301 gfx_string string;
303 FT_Init_FreeType( &library );
304 error = FT_New_Face( library, font, 0, &face );
305 if ( error ) return -1;
306 error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
307 if ( error ) return -1;
309 string = gfx_string_create( canvas, face, text, rotation, tabwidth, size );
310 text_width = string->width;
311 gfx_string_destroy(string);
312 FT_Done_FreeType(library);
313 return text_width/64;
314 }
316 static void gfx_libart_close_path(gfx_node_t *node, ArtVpath **vec)
317 {
318 /* libart must have end==start for closed paths,
319 even if using ART_MOVETO and not ART_MOVETO_OPEN
320 so add extra point which is the same as the starting point */
321 int points_max = node->points; /* scaled array has exact size */
322 int points = node->points - 1;
323 art_vpath_add_point (vec, &points, &points_max, ART_LINETO,
324 (**vec).x, (**vec).y);
325 art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
326 }
329 /* find bbox of a string */
330 static void compute_string_bbox(gfx_string string) {
331 unsigned int n;
332 FT_BBox bbox;
334 bbox.xMin = bbox.yMin = 32000;
335 bbox.xMax = bbox.yMax = -32000;
336 for ( n = 0; n < string->num_glyphs; n++ ) {
337 FT_BBox glyph_bbox;
338 FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
339 &glyph_bbox );
340 if (glyph_bbox.xMin < bbox.xMin) {
341 bbox.xMin = glyph_bbox.xMin;
342 }
343 if (glyph_bbox.yMin < bbox.yMin) {
344 bbox.yMin = glyph_bbox.yMin;
345 }
346 if (glyph_bbox.xMax > bbox.xMax) {
347 bbox.xMax = glyph_bbox.xMax;
348 }
349 if (glyph_bbox.yMax > bbox.yMax) {
350 bbox.yMax = glyph_bbox.yMax;
351 }
352 }
353 if ( bbox.xMin > bbox.xMax ) {
354 bbox.xMin = 0;
355 bbox.yMin = 0;
356 bbox.xMax = 0;
357 bbox.yMax = 0;
358 }
359 string->bbox.xMin = bbox.xMin;
360 string->bbox.xMax = bbox.xMax;
361 string->bbox.yMin = bbox.yMin;
362 string->bbox.yMax = bbox.yMax;
363 }
365 /* create a free type glyph string */
366 gfx_string gfx_string_create(gfx_canvas_t *canvas, FT_Face face,const char *text,
367 int rotation, double tabwidth, double size )
368 {
370 FT_GlyphSlot slot = face->glyph; /* a small shortcut */
371 FT_Bool use_kerning;
372 FT_UInt previous;
373 FT_Vector ft_pen;
375 gfx_string string;
376 gfx_char glyph; /* current glyph in table */
377 unsigned int n;
378 int error;
379 int gottab = 0;
380 ft_pen.x = 0; /* start at (0,0) !! */
381 ft_pen.y = 0;
383 string = (gfx_string) malloc (sizeof(struct gfx_string_s));
384 string->width = 0;
385 string->height = 0;
386 string->count = strlen (text);
387 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
388 string->num_glyphs = 0;
389 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
390 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
391 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
392 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
394 use_kerning = FT_HAS_KERNING(face);
395 previous = 0;
396 glyph = string->glyphs;
397 for (n=0; n<string->count;glyph++) {
398 FT_Vector vec;
399 /* handle the tabs ...
400 have a witespace glyph inserted, but set its width such that the distance
401 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
402 unsigned char letter = text[n];
404 gottab = 0;
405 if (letter == '\\' && n+1 < string->count && text[n+1] == 't'){
406 /* we have a tab here so skip the backslash and
407 set t to ' ' so that we get a white space */
408 gottab = 1;
409 n++;
410 letter = ' ';
411 }
412 if (letter == '\t'){
413 letter = ' ';
414 gottab = 1 ;
415 }
416 /* initialize each struct gfx_char_s */
417 glyph->index = 0;
418 glyph->pos.x = 0;
419 glyph->pos.y = 0;
420 glyph->image = NULL;
422 glyph->index = FT_Get_Char_Index( face, letter );
424 /* compute glyph origin */
425 if ( use_kerning && previous && glyph->index ) {
426 FT_Vector kerning;
427 FT_Get_Kerning (face, previous, glyph->index,
428 ft_kerning_default, &kerning);
429 ft_pen.x += kerning.x;
430 ft_pen.y += kerning.y;
431 }
433 /* load the glyph image (in its native format) */
434 /* for now, we take a monochrome glyph bitmap */
435 error = FT_Load_Glyph (face, glyph->index, size > canvas->font_aa_threshold ?
436 canvas->aa_type == AA_NORMAL ? FT_LOAD_TARGET_NORMAL :
437 canvas->aa_type == AA_LIGHT ? FT_LOAD_TARGET_LIGHT :
438 FT_LOAD_TARGET_MONO : FT_LOAD_TARGET_MONO);
439 if (error) {
440 fprintf (stderr, "couldn't load glyph: %c\n", letter);
441 continue;
442 }
443 error = FT_Get_Glyph (slot, &glyph->image);
444 if (error) {
445 fprintf (stderr, "couldn't get glyph from slot: %c\n", letter);
446 continue;
447 }
448 /* if we are in tabbing mode, we replace the tab with a space and shift the position
449 of the space so that its left edge is where the tab was supposed to land us */
450 if (gottab){
451 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
452 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
453 }
454 /* store current pen position */
455 glyph->pos.x = ft_pen.x;
456 glyph->pos.y = ft_pen.y;
459 ft_pen.x += slot->advance.x;
460 ft_pen.y += slot->advance.y;
462 /* rotate glyph */
463 vec = glyph->pos;
464 FT_Vector_Transform (&vec, &string->transform);
465 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
466 if (error) {
467 fprintf (stderr, "couldn't transform glyph\n");
468 continue;
469 }
471 /* convert to a bitmap - destroy native image */
472 error = FT_Glyph_To_Bitmap (&glyph->image, size > canvas->font_aa_threshold ?
473 canvas->aa_type == AA_NORMAL ? FT_RENDER_MODE_NORMAL :
474 canvas->aa_type == AA_LIGHT ? FT_RENDER_MODE_LIGHT :
475 FT_RENDER_MODE_MONO : FT_RENDER_MODE_MONO, 0, 1);
476 if (error) {
477 fprintf (stderr, "couldn't convert glyph to bitmap\n");
478 continue;
479 }
481 /* increment number of glyphs */
482 previous = glyph->index;
483 string->num_glyphs++;
484 n++;
486 }
487 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
488 compute_string_bbox( string );
489 /* the last character was a tab */
490 /* if (gottab) { */
491 string->width = ft_pen.x;
492 /* } else {
493 string->width = string->bbox.xMax - string->bbox.xMin;
494 } */
495 string->height = string->bbox.yMax - string->bbox.yMin;
497 return string;
498 }
501 static int gfx_save_png (art_u8 *buffer, FILE *fp,
502 long width, long height, long bytes_per_pixel);
503 /* render grafics into png image */
505 int gfx_render_png (gfx_canvas_t *canvas,
506 art_u32 width, art_u32 height,
507 gfx_color_t background, FILE *fp){
510 FT_Library library;
511 gfx_node_t *node = canvas->firstnode;
512 /*
513 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
514 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
515 */
516 unsigned long pys_width = width * canvas->zoom;
517 unsigned long pys_height = height * canvas->zoom;
518 const int bytes_per_pixel = 4;
519 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
521 /* fill that buffer with out background color */
522 gfx_color_t *buffp = art_new (gfx_color_t, pys_width*pys_height);
523 art_u8 *buffer = (art_u8 *)buffp;
524 unsigned long i;
525 for (i=0;i<pys_width*pys_height;
526 i++){
527 *(buffp++)=background;
528 }
529 FT_Init_FreeType( &library );
530 while(node){
531 switch (node->type) {
532 case GFX_LINE:
533 case GFX_AREA: {
534 ArtVpath *vec;
535 double dst[6];
536 ArtSVP *svp;
537 art_affine_scale(dst,canvas->zoom,canvas->zoom);
538 vec = art_vpath_affine_transform(node->path,dst);
539 if (node->closed_path)
540 gfx_libart_close_path(node, &vec);
541 /* gfx_round_scaled_coordinates(vec); */
542 /* pvec = art_vpath_perturb(vec);
543 art_free(vec); */
544 if(node->type == GFX_LINE){
545 svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
546 ART_PATH_STROKE_CAP_ROUND,
547 node->size*canvas->zoom,4,0.25);
548 } else {
549 svp = art_svp_from_vpath ( vec );
550 /* this takes time and is unnecessary since we make
551 sure elsewhere that the areas are going clock-whise */
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 }
558 art_free(vec);
559 /* this is from gnome since libart does not have this yet */
560 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
561 node->color, buffer, rowstride, NULL);
562 art_svp_free(svp);
563 break;
564 }
565 case GFX_TEXT: {
566 unsigned int n;
567 int error;
568 art_u8 fcolor[4],falpha;
569 FT_Face face;
570 gfx_char glyph;
571 gfx_string string;
572 FT_Vector vec; /* 26.6 */
574 float pen_x = 0.0 , pen_y = 0.0;
575 /* double x,y; */
576 long ix,iy;
578 fcolor[0] = node->color >> 24;
579 fcolor[1] = (node->color >> 16) & 0xff;
580 fcolor[2] = (node->color >> 8) & 0xff;
581 falpha = node->color & 0xff;
582 error = FT_New_Face( library,
583 (char *)node->filename,
584 0,
585 &face );
586 if ( error ) {
587 rrd_set_error("failed to load %s",node->filename);
588 break;
589 }
590 error = FT_Set_Char_Size(face, /* handle to face object */
591 (long)(node->size*64),
592 (long)(node->size*64),
593 (long)(100*canvas->zoom),
594 (long)(100*canvas->zoom));
595 if ( error ) break;
596 pen_x = node->x * canvas->zoom;
597 pen_y = node->y * canvas->zoom;
599 string = gfx_string_create (canvas, face, node->text, node->angle, node->tabwidth, node->size);
600 switch(node->halign){
601 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
602 break;
603 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
604 -string->bbox.xMax/2:-string->bbox.xMin/2;
605 break;
606 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
607 break;
608 case GFX_H_NULL: vec.x = 0;
609 break;
610 }
612 switch(node->valign){
613 case GFX_V_TOP: vec.y = string->bbox.yMax;
614 break;
615 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
616 string->bbox.yMax/2:string->bbox.yMin/2;
617 break;
618 case GFX_V_BOTTOM: vec.y = 0;
619 break;
620 case GFX_V_NULL: vec.y = 0;
621 break;
622 }
623 pen_x += vec.x/64;
624 pen_y += vec.y/64;
625 glyph = string->glyphs;
626 for(n=0; n<string->num_glyphs; ++n, ++glyph) {
627 int gr;
628 FT_Glyph image;
629 FT_BitmapGlyph bit;
630 /* long buf_x,comp_n; */
631 /* make copy to transform */
632 if (! glyph->image) {
633 fprintf (stderr, "no image\n");
634 continue;
635 }
636 error = FT_Glyph_Copy (glyph->image, &image);
637 if (error) {
638 fprintf (stderr, "couldn't copy image\n");
639 continue;
640 }
642 /* transform it */
643 vec = glyph->pos;
644 FT_Vector_Transform (&vec, &string->transform);
646 bit = (FT_BitmapGlyph) image;
647 gr = bit->bitmap.num_grays -1;
648 /*
649 buf_x = (pen_x + 0.5) + (double)bit->left;
650 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
651 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
652 buf_x *= bytes_per_pixel ;
653 for (iy=0; iy < bit->bitmap.rows; iy++){
654 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
655 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
656 buf_y *= rowstride;
657 for (ix=0;ix < bit->bitmap.width;ix++){
658 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
659 }
660 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
661 }
662 art_free(letter);
663 */
664 switch ( bit->bitmap.pixel_mode ) {
665 case FT_PIXEL_MODE_GRAY:
666 for (iy=0; iy < bit->bitmap.rows; iy++){
667 long buf_y = iy+(pen_y+0.5)-bit->top;
668 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
669 buf_y *= rowstride;
670 for (ix=0;ix < bit->bitmap.width;ix++){
671 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
672 art_u8 font_alpha;
674 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
675 buf_x *= bytes_per_pixel ;
676 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix);
677 if (font_alpha > 0){
678 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
679 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
680 }
681 }
682 }
683 break;
685 case FT_PIXEL_MODE_MONO:
686 for (iy=0; iy < bit->bitmap.rows; iy++){
687 long buf_y = iy+(pen_y+0.5)-bit->top;
688 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
689 buf_y *= rowstride;
690 for (ix=0;ix < bit->bitmap.width;ix++){
691 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
693 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
694 buf_x *= bytes_per_pixel ;
695 if ( (fcolor[3] = falpha * ((*(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix/8) >> (7 - (ix % 8))) & 1)) > 0 )
696 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
697 }
698 }
699 break;
701 default:
702 rrd_set_error("unknown freetype pixel mode: %d", bit->bitmap.pixel_mode);
703 break;
704 }
706 /*
707 for (iy=0; iy < bit->bitmap.rows; iy++){
708 long buf_y = iy+(pen_y+0.5)-bit->top;
709 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
710 buf_y *= rowstride;
711 for (ix=0;ix < bit->bitmap.width;ix++){
712 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
713 art_u8 font_alpha;
715 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
716 buf_x *= bytes_per_pixel ;
717 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
718 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
719 for (iz = 0; iz < 3; iz++){
720 art_u8 *orig = buffer + buf_y + buf_x + iz;
721 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
722 (double)fcolor[iz] / gr * (font_alpha));
723 }
724 }
725 }
726 */
727 FT_Done_Glyph (image);
728 }
729 gfx_string_destroy(string);
730 }
731 }
732 node = node->next;
733 }
734 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
735 art_free(buffer);
736 FT_Done_FreeType( library );
737 return 0;
738 }
740 /* free memory used by nodes this will also remove memory required for
741 associated paths and svcs ... but not for text strings */
742 int
743 gfx_destroy (gfx_canvas_t *canvas){
744 gfx_node_t *next,*node = canvas->firstnode;
745 while(node){
746 next = node->next;
747 art_free(node->path);
748 free(node->text);
749 free(node->filename);
750 art_free(node);
751 node = next;
752 }
753 art_free(canvas);
754 return 0;
755 }
757 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
758 png_structp png_ptr = NULL;
759 png_infop info_ptr = NULL;
760 int i;
761 png_bytep *row_pointers;
762 int rowstride = width * bytes_per_pixel;
763 png_text text[2];
765 if (fp == NULL)
766 return (1);
768 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
769 if (png_ptr == NULL)
770 {
771 return (1);
772 }
773 row_pointers = (png_bytepp)png_malloc(png_ptr,
774 height*sizeof(png_bytep));
776 info_ptr = png_create_info_struct(png_ptr);
778 if (info_ptr == NULL)
779 {
780 png_free(png_ptr,row_pointers);
781 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
782 return (1);
783 }
785 if (setjmp(png_jmpbuf(png_ptr)))
786 {
787 /* If we get here, we had a problem writing the file */
788 png_destroy_write_struct(&png_ptr, &info_ptr);
789 return (1);
790 }
792 png_init_io(png_ptr, fp);
793 png_set_IHDR (png_ptr, info_ptr,width, height,
794 8, PNG_COLOR_TYPE_RGB_ALPHA,
795 PNG_INTERLACE_NONE,
796 PNG_COMPRESSION_TYPE_DEFAULT,
797 PNG_FILTER_TYPE_DEFAULT);
799 text[0].key = "Software";
800 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
801 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
802 png_set_text (png_ptr, info_ptr, text, 1);
804 /* lets make this fast while ending up with some increass in image size */
805 png_set_filter(png_ptr,0,PNG_FILTER_NONE);
806 /* png_set_filter(png_ptr,0,PNG_FILTER_SUB); */
807 png_set_compression_level(png_ptr,1);
808 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
809 /*
810 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
811 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
812 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
814 /* Write header data */
815 png_write_info (png_ptr, info_ptr);
816 for (i = 0; i < height; i++)
817 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
819 png_write_image(png_ptr, row_pointers);
820 png_write_end(png_ptr, info_ptr);
821 png_free(png_ptr,row_pointers);
822 png_destroy_write_struct(&png_ptr, &info_ptr);
823 return 1;
824 }
827 /* ----- COMMON ROUTINES for pdf, svg and eps */
828 #define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
829 #define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
831 #define PDF_CALC_DEBUG 0
833 typedef struct pdf_point
834 {
835 double x, y;
836 } pdf_point;
838 typedef struct
839 {
840 double ascender, descender, baselineY;
841 pdf_point sizep, minp, maxp;
842 double x, y, tdx, tdy;
843 double r, cos_r, sin_r;
844 double ma, mb, mc, md, mx, my; /* pdf coord matrix */
845 double tmx, tmy; /* last 2 coords of text coord matrix */
846 #if PDF_CALC_DEBUG
847 int debug;
848 #endif
849 } pdf_coords;
851 #if PDF_CALC_DEBUG
852 static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
853 {
854 fprintf(stderr, "PDF CALC =============================\n");
855 fprintf(stderr, " '%s' at %f pt\n", node->text, node->size);
856 fprintf(stderr, " align h = %s, v = %s, sizep = %f, %f\n",
857 (node->halign == GFX_H_RIGHT ? "r" :
858 (node->halign == GFX_H_CENTER ? "c" :
859 (node->halign == GFX_H_LEFT ? "l" : "N"))),
860 (node->valign == GFX_V_TOP ? "t" :
861 (node->valign == GFX_V_CENTER ? "c" :
862 (node->valign == GFX_V_BOTTOM ? "b" : "N"))),
863 g->sizep.x, g->sizep.y);
864 fprintf(stderr, " r = %f = %f, cos = %f, sin = %f\n",
865 g->r, node->angle, g->cos_r, g->sin_r);
866 fprintf(stderr, " ascender = %f, descender = %f, baselineY = %f\n",
867 g->ascender, g->descender, g->baselineY);
868 fprintf(stderr, " sizep: %f, %f\n", g->sizep.x, g->sizep.y);
869 fprintf(stderr, " minp: %f, %f maxp = %f, %f\n",
870 g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
871 fprintf(stderr, " x = %f, y = %f\n", g->x, g->y);
872 fprintf(stderr, " tdx = %f, tdy = %f\n", g->tdx, g->tdy);
873 fprintf(stderr, " GM = %f, %f, %f, %f, %f, %f\n",
874 g->ma, g->mb, g->mc, g->md, g->mx, g->my);
875 fprintf(stderr, " TM = %f, %f, %f, %f, %f, %f\n",
876 g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
877 }
878 #endif
880 #if PDF_CALC_DEBUG
881 #define PDF_DD(x) if (g->debug) x;
882 #else
883 #define PDF_DD(x)
884 #endif
886 static void pdf_rotate(pdf_coords *g, pdf_point *p)
887 {
888 double x2 = g->cos_r * p->x - g->sin_r * p->y;
889 double y2 = g->sin_r * p->x + g->cos_r * p->y;
890 PDF_DD( fprintf(stderr, " rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
891 p->x = x2;
892 p->y = y2;
893 }
896 static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
897 {
898 pdf_point a, b, c;
899 #if PDF_CALC_DEBUG
900 /* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
901 g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
902 #endif
903 g->x = node->x;
904 g->y = page_height - node->y;
905 if (node->angle) {
906 g->r = 2 * M_PI * node->angle / 360.0;
907 g->cos_r = cos(g->r);
908 g->sin_r = sin(g->r);
909 } else {
910 g->r = 0;
911 g->cos_r = 1;
912 g->sin_r = 0;
913 }
914 g->ascender = afm_get_ascender(node->filename, node->size);
915 g->descender = afm_get_descender(node->filename, node->size);
916 g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
917 /* seems like libart ignores the descender when doing vertial-align = bottom,
918 so we do that too, to get labels v-aligning properly */
919 g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
920 g->baselineY = -g->ascender - g->sizep.y / 2;
921 a.x = g->sizep.x; a.y = g->sizep.y;
922 b.x = g->sizep.x; b.y = 0;
923 c.x = 0; c.y = g->sizep.y;
924 if (node->angle) {
925 pdf_rotate(g, &a);
926 pdf_rotate(g, &b);
927 pdf_rotate(g, &c);
928 }
929 g->minp.x = min3(a.x, b.x, c.x);
930 g->minp.y = min3(a.y, b.y, c.y);
931 g->maxp.x = max3(a.x, b.x, c.x);
932 g->maxp.y = max3(a.y, b.y, c.y);
933 /* The alignment parameters in node->valign and node->halign
934 specifies the alignment in the non-rotated coordinate system
935 (very unlike pdf/postscript), which complicates matters.
936 */
937 switch (node->halign) {
938 case GFX_H_RIGHT: g->tdx = -g->maxp.x; break;
939 case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
940 case GFX_H_LEFT: g->tdx = -g->minp.x; break;
941 case GFX_H_NULL: g->tdx = 0; break;
942 }
943 switch(node->valign){
944 case GFX_V_TOP: g->tdy = -g->maxp.y; break;
945 case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
946 case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
947 case GFX_V_NULL: g->tdy = 0; break;
948 }
949 g->ma = g->cos_r;
950 g->mb = g->sin_r;
951 g->mc = -g->sin_r;
952 g->md = g->cos_r;
953 g->mx = g->x + g->tdx;
954 g->my = g->y + g->tdy;
955 g->tmx = g->mx - g->ascender * g->mc;
956 g->tmy = g->my - g->ascender * g->md;
957 PDF_DD(pdf_dump_calc(node, g))
958 }
960 /* ------- SVG -------
961 SVG reference:
962 http://www.w3.org/TR/SVG/
963 */
964 static int svg_indent = 0;
965 static int svg_single_line = 0;
966 static const char *svg_default_font = "Helvetica";
967 typedef struct svg_dash
968 {
969 int dash_enable;
970 double dash_adjust, dash_len, dash_offset;
971 double adjusted_on, adjusted_off;
972 } svg_dash;
975 static void svg_print_indent(FILE *fp)
976 {
977 int i;
978 for (i = svg_indent - svg_single_line; i > 0; i--) {
979 putc(' ', fp);
980 putc(' ', fp);
981 }
982 }
984 static void svg_start_tag(FILE *fp, const char *name)
985 {
986 svg_print_indent(fp);
987 putc('<', fp);
988 fputs(name, fp);
989 svg_indent++;
990 }
992 static void svg_close_tag_single_line(FILE *fp)
993 {
994 svg_single_line++;
995 putc('>', fp);
996 }
998 static void svg_close_tag(FILE *fp)
999 {
1000 putc('>', fp);
1001 if (!svg_single_line)
1002 putc('\n', fp);
1003 }
1005 static void svg_end_tag(FILE *fp, const char *name)
1006 {
1007 /* name is NULL if closing empty-node tag */
1008 svg_indent--;
1009 if (svg_single_line)
1010 svg_single_line--;
1011 else if (name)
1012 svg_print_indent(fp);
1013 if (name != NULL) {
1014 fputs("</", fp);
1015 fputs(name, fp);
1016 } else {
1017 putc('/', fp);
1018 }
1019 svg_close_tag(fp);
1020 }
1022 static void svg_close_tag_empty_node(FILE *fp)
1023 {
1024 svg_end_tag(fp, NULL);
1025 }
1027 static void svg_write_text(FILE *fp, const char *text)
1028 {
1029 const unsigned char *p, *start, *last;
1030 unsigned int ch;
1031 p = (const unsigned char*)text;
1032 if (!p)
1033 return;
1034 /* trim leading spaces */
1035 while (*p == ' ')
1036 p++;
1037 start = p;
1038 /* trim trailing spaces */
1039 last = p - 1;
1040 while ((ch = *p) != 0) {
1041 if (ch != ' ')
1042 last = p;
1043 p++;
1044 }
1045 /* encode trimmed text */
1046 p = start;
1047 while (p <= last) {
1048 ch = *p++;
1049 ch = afm_host2unicode(ch); /* unsafe macro */
1050 switch (ch) {
1051 case '&': fputs("&", fp); break;
1052 case '<': fputs("<", fp); break;
1053 case '>': fputs(">", fp); break;
1054 case '"': fputs(""", fp); break;
1055 default:
1056 if (ch >= 127)
1057 fprintf(fp, "&#%d;", ch);
1058 else
1059 putc(ch, fp);
1060 }
1061 }
1062 }
1064 static void svg_format_number(char *buf, int bufsize, double d)
1065 {
1066 /* omit decimals if integer to reduce filesize */
1067 char *p;
1068 snprintf(buf, bufsize, "%.2f", d);
1069 p = buf; /* doesn't trust snprintf return value */
1070 while (*p)
1071 p++;
1072 while (--p > buf) {
1073 char ch = *p;
1074 if (ch == '0') {
1075 *p = '\0'; /* zap trailing zeros */
1076 continue;
1077 }
1078 if (ch == '.')
1079 *p = '\0'; /* zap trailing dot */
1080 break;
1081 }
1082 }
1084 static void svg_write_number(FILE *fp, double d)
1085 {
1086 char buf[60];
1087 svg_format_number(buf, sizeof(buf), d);
1088 fputs(buf, fp);
1089 }
1091 static int svg_color_is_black(int c)
1092 {
1093 /* gfx_color_t is RRGGBBAA */
1094 return c == 0x000000FF;
1095 }
1097 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
1098 {
1099 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
1100 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
1101 gfx_color_t opacity = c & 0xFF;
1102 fprintf(fp, " %s=\"", attr);
1103 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
1104 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
1105 fprintf(fp, "#%03lX",
1106 ( ((rrggbb >> 8) & 0xF00)
1107 | ((rrggbb >> 4) & 0x0F0)
1108 | ( rrggbb & 0x00F)));
1109 } else {
1110 fprintf(fp, "#%06lX", rrggbb);
1111 }
1112 fputs("\"", fp);
1113 if (opacity != 0xFF) {
1114 fprintf(fp, " opacity=\"");
1115 svg_write_number(fp, opacity / 255.0);
1116 fputs("\"", fp);
1117 }
1118 }
1120 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
1121 {
1122 double offset;
1123 int mult;
1124 if (node->dash_on <= 0 || node->dash_off <= 0) {
1125 d->dash_enable = 0;
1126 return;
1127 }
1128 d->dash_enable = 1;
1129 d->dash_len = node->dash_on + node->dash_off;
1130 /* dash on/off adjustment due to round caps */
1131 d->dash_adjust = 0.8 * node->size;
1132 d->adjusted_on = node->dash_on - d->dash_adjust;
1133 if (d->adjusted_on < 0.01)
1134 d->adjusted_on = 0.01;
1135 d->adjusted_off = d->dash_len - d->adjusted_on;
1136 /* dash offset calc */
1137 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
1138 offset = node->path[0].y;
1139 else
1140 offset = node->path[0].x;
1141 mult = (int)fabs(offset / d->dash_len);
1142 d->dash_offset = offset - mult * d->dash_len;
1143 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
1144 d->dash_offset = d->dash_len - d->dash_offset;
1145 }
1147 static int svg_dash_equal(svg_dash *a, svg_dash *b)
1148 {
1149 if (a->dash_enable != b->dash_enable)
1150 return 0;
1151 if (a->adjusted_on != b->adjusted_on)
1152 return 0;
1153 if (a->adjusted_off != b->adjusted_off)
1154 return 0;
1155 /* rest of properties will be the same when on+off are */
1156 return 1;
1157 }
1159 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
1160 {
1161 svg_dash dash_info;
1162 svg_get_dash(node, &dash_info);
1163 fputs(" stroke-width=\"", fp);
1164 svg_write_number(fp, node->size);
1165 fputs("\"", fp);
1166 svg_write_color(fp, node->color, "stroke");
1167 fputs(" fill=\"none\"", fp);
1168 if (dash_info.dash_enable) {
1169 if (dash_info.dash_offset != 0) {
1170 fputs(" stroke-dashoffset=\"", fp);
1171 svg_write_number(fp, dash_info.dash_offset);
1172 fputs("\"", fp);
1173 }
1174 fputs(" stroke-dasharray=\"", fp);
1175 svg_write_number(fp, dash_info.adjusted_on);
1176 fputs(",", fp);
1177 svg_write_number(fp, dash_info.adjusted_off);
1178 fputs("\"", fp);
1179 }
1180 }
1182 static int svg_is_int_step(double a, double b)
1183 {
1184 double diff = fabs(a - b);
1185 return floor(diff) == diff;
1186 }
1188 static int svg_path_straight_segment(FILE *fp,
1189 double lastA, double currentA, double currentB,
1190 gfx_node_t *node,
1191 int segment_idx, int isx, char absChar, char relChar)
1192 {
1193 if (!svg_is_int_step(lastA, currentA)) {
1194 putc(absChar, fp);
1195 svg_write_number(fp, currentA);
1196 return 0;
1197 }
1198 if (segment_idx < node->points - 1) {
1199 ArtVpath *vec = node->path + segment_idx + 1;
1200 if (vec->code == ART_LINETO) {
1201 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1202 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1203 if (nextB == currentB
1204 && ((currentA >= lastA) == (nextA >= currentA))
1205 && svg_is_int_step(currentA, nextA)) {
1206 return 1; /* skip to next as it is a straight line */
1207 }
1208 }
1209 }
1210 putc(relChar, fp);
1211 svg_write_number(fp, currentA - lastA);
1212 return 0;
1213 }
1215 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1216 {
1217 int i;
1218 double lastX = 0, lastY = 0;
1219 /* for straight lines <path..> tags take less space than
1220 <line..> tags because of the efficient packing
1221 in the 'd' attribute */
1222 svg_start_tag(fp, "path");
1223 if (!multi)
1224 svg_common_path_attributes(fp, node);
1225 fputs(" d=\"", fp);
1226 /* specification of the 'd' attribute: */
1227 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1228 for (i = 0; i < node->points; i++) {
1229 ArtVpath *vec = node->path + i;
1230 double x = vec->x - LINEOFFSET;
1231 double y = vec->y - LINEOFFSET;
1232 switch (vec->code) {
1233 case ART_MOVETO_OPEN: /* fall-through */
1234 case ART_MOVETO:
1235 putc('M', fp);
1236 svg_write_number(fp, x);
1237 putc(',', fp);
1238 svg_write_number(fp, y);
1239 break;
1240 case ART_LINETO:
1241 /* try optimize filesize by using minimal lineto commands */
1242 /* without introducing rounding errors. */
1243 if (x == lastX) {
1244 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1245 continue;
1246 } else if (y == lastY) {
1247 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1248 continue;
1249 } else {
1250 putc('L', fp);
1251 svg_write_number(fp, x);
1252 putc(',', fp);
1253 svg_write_number(fp, y);
1254 }
1255 break;
1256 case ART_CURVETO: break; /* unsupported */
1257 case ART_END: break; /* nop */
1258 }
1259 lastX = x;
1260 lastY = y;
1261 }
1262 if (node->closed_path)
1263 fputs(" Z", fp);
1264 fputs("\"", fp);
1265 svg_close_tag_empty_node(fp);
1266 }
1268 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1269 {
1270 /* optimize for multiple paths with the same color, penwidth, etc. */
1271 int num = 1;
1272 gfx_node_t *node = *nodeR;
1273 gfx_node_t *next = node->next;
1274 while (next) {
1275 if (next->type != node->type
1276 || next->size != node->size
1277 || next->color != node->color
1278 || next->dash_on != node->dash_on
1279 || next->dash_off != node->dash_off)
1280 break;
1281 next = next->next;
1282 num++;
1283 }
1284 if (num == 1) {
1285 svg_path(fp, node, 0);
1286 return;
1287 }
1288 svg_start_tag(fp, "g");
1289 svg_common_path_attributes(fp, node);
1290 svg_close_tag(fp);
1291 while (num && node) {
1292 svg_path(fp, node, 1);
1293 if (!--num)
1294 break;
1295 node = node->next;
1296 *nodeR = node;
1297 }
1298 svg_end_tag(fp, "g");
1299 }
1301 static void svg_area(FILE *fp, gfx_node_t *node)
1302 {
1303 int i;
1304 double startX = 0, startY = 0;
1305 svg_start_tag(fp, "polygon");
1306 fputs(" ", fp);
1307 svg_write_color(fp, node->color, "fill");
1308 fputs(" points=\"", fp);
1309 for (i = 0; i < node->points; i++) {
1310 ArtVpath *vec = node->path + i;
1311 double x = vec->x - LINEOFFSET;
1312 double y = vec->y - LINEOFFSET;
1313 switch (vec->code) {
1314 case ART_MOVETO_OPEN: /* fall-through */
1315 case ART_MOVETO:
1316 svg_write_number(fp, x);
1317 putc(',', fp);
1318 svg_write_number(fp, y);
1319 startX = x;
1320 startY = y;
1321 break;
1322 case ART_LINETO:
1323 if (i == node->points - 2
1324 && node->path[i + 1].code == ART_END
1325 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1326 break; /* poly area always closed, no need for last point */
1327 }
1328 putc(' ', fp);
1329 svg_write_number(fp, x);
1330 putc(',', fp);
1331 svg_write_number(fp, y);
1332 break;
1333 case ART_CURVETO: break; /* unsupported */
1334 case ART_END: break; /* nop */
1335 }
1336 }
1337 fputs("\"", fp);
1338 svg_close_tag_empty_node(fp);
1339 }
1341 static void svg_text(FILE *fp, gfx_node_t *node)
1342 {
1343 pdf_coords g;
1344 /* as svg has 0,0 in top-left corner (like most screens) instead of
1345 bottom-left corner like pdf and eps, we have to fake the coords
1346 using offset and inverse sin(r) value */
1347 int page_height = 1000;
1348 pdf_calc(page_height, node, &g);
1349 if (node->angle != 0) {
1350 svg_start_tag(fp, "g");
1351 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1352 skewed text */
1353 fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
1354 g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
1355 svg_close_tag(fp);
1356 }
1357 svg_start_tag(fp, "text");
1358 if (!node->angle) {
1359 fputs(" x=\"", fp);
1360 svg_write_number(fp, g.tmx);
1361 fputs("\" y=\"", fp);
1362 svg_write_number(fp, page_height - g.tmy);
1363 fputs("\"", fp);
1364 }
1366 /* if (strcmp(node->filename, svg_default_font))
1367 fprintf(fp, " font-family=\"%s\"", node->filename);
1368 */
1369 fputs(" font-family=\"Helvetica", fp);
1370 fputs("\" font-size=\"", fp);
1371 svg_write_number(fp, node->size);
1372 fputs("\"", fp);
1373 if (!svg_color_is_black(node->color))
1374 svg_write_color(fp, node->color, "fill");
1375 svg_close_tag_single_line(fp);
1376 /* support for node->tabwidth missing */
1377 svg_write_text(fp, node->text);
1378 svg_end_tag(fp, "text");
1379 if (node->angle != 0)
1380 svg_end_tag(fp, "g");
1381 }
1383 int gfx_render_svg (gfx_canvas_t *canvas,
1384 art_u32 width, art_u32 height,
1385 gfx_color_t background, FILE *fp){
1386 gfx_node_t *node = canvas->firstnode;
1387 fputs(
1388 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1389 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1390 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1391 "<!--\n"
1392 " SVG file created by RRDtool,\n"
1393 " Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch\n"
1394 "\n"
1395 " The width/height attributes in the outhermost svg node\n"
1396 " are just default sizes for the browser which is used\n"
1397 " if the svg file is openened directly without being\n"
1398 " embedded in an html file.\n"
1399 " The viewBox is the local coord system for rrdtool.\n"
1400 "-->\n", fp);
1401 svg_start_tag(fp, "svg");
1402 fputs(" width=\"", fp);
1403 svg_write_number(fp, width * canvas->zoom);
1404 fputs("\" height=\"", fp);
1405 svg_write_number(fp, height * canvas->zoom);
1406 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1407 svg_write_number(fp, -LINEOFFSET);
1408 fputs(" ", fp);
1409 svg_write_number(fp, -LINEOFFSET);
1410 fputs(" ", fp);
1411 svg_write_number(fp, width - LINEOFFSET);
1412 fputs(" ", fp);
1413 svg_write_number(fp, height - LINEOFFSET);
1414 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1415 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1416 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1417 svg_close_tag(fp);
1418 svg_start_tag(fp, "rect");
1419 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1420 svg_write_color(fp, background, "fill");
1421 svg_close_tag_empty_node(fp);
1422 while (node) {
1423 switch (node->type) {
1424 case GFX_LINE:
1425 svg_multi_path(fp, &node);
1426 break;
1427 case GFX_AREA:
1428 svg_area(fp, node);
1429 break;
1430 case GFX_TEXT:
1431 svg_text(fp, node);
1432 }
1433 node = node->next;
1434 }
1435 svg_end_tag(fp, "svg");
1436 return 0;
1437 }
1439 /* ------- EPS -------
1440 EPS and Postscript references:
1441 http://partners.adobe.com/asn/developer/technotes/postscript.html
1442 */
1444 typedef struct eps_font
1445 {
1446 const char *ps_font;
1447 int id;
1448 struct eps_font *next;
1449 } eps_font;
1451 typedef struct eps_state
1452 {
1453 FILE *fp;
1454 gfx_canvas_t *canvas;
1455 art_u32 page_width, page_height;
1456 eps_font *font_list;
1457 /*--*/
1458 gfx_color_t color;
1459 const char *font;
1460 double font_size;
1461 double line_width;
1462 int linecap, linejoin;
1463 int has_dash;
1464 } eps_state;
1466 static void eps_set_color(eps_state *state, gfx_color_t color)
1467 {
1468 #if USE_EPS_FAKE_ALPHA
1469 double a1, a2;
1470 #endif
1471 /* gfx_color_t is RRGGBBAA */
1472 if (state->color == color)
1473 return;
1474 #if USE_EPS_FAKE_ALPHA
1475 a1 = (color & 255) / 255.0;
1476 a2 = 255 * (1 - a1);
1477 #define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
1478 #else
1479 #define eps_color_calc(x) (int)( (x) & 255)
1480 #endif
1481 /* gfx_color_t is RRGGBBAA */
1482 if (state->color == color)
1483 return;
1484 fprintf(state->fp, "%d %d %d Rgb\n",
1485 eps_color_calc(color >> 24),
1486 eps_color_calc(color >> 16),
1487 eps_color_calc(color >> 8));
1488 state->color = color;
1489 }
1491 static int eps_add_font(eps_state *state, gfx_node_t *node)
1492 {
1493 /* The fonts list could be postponed to the end using
1494 (atend), but let's be nice and have them in the header. */
1495 const char *ps_font = afm_get_font_postscript_name(node->filename);
1496 eps_font *ef;
1497 for (ef = state->font_list; ef; ef = ef->next) {
1498 if (!strcmp(ps_font, ef->ps_font))
1499 return 0;
1500 }
1501 ef = malloc(sizeof(eps_font));
1502 if (ef == NULL) {
1503 rrd_set_error("malloc for eps_font");
1504 return -1;
1505 }
1506 ef->next = state->font_list;
1507 ef->ps_font = ps_font;
1508 state->font_list = ef;
1509 return 0;
1510 }
1512 static void eps_list_fonts(eps_state *state, const char *dscName)
1513 {
1514 eps_font *ef;
1515 int lineLen = strlen(dscName);
1516 if (!state->font_list)
1517 return;
1518 fputs(dscName, state->fp);
1519 for (ef = state->font_list; ef; ef = ef->next) {
1520 int nameLen = strlen(ef->ps_font);
1521 if (lineLen + nameLen > 100 && lineLen) {
1522 fputs("\n", state->fp);
1523 fputs("%%- \n", state->fp);
1524 lineLen = 5;
1525 } else {
1526 fputs(" ", state->fp);
1527 lineLen++;
1528 }
1529 fputs(ef->ps_font, state->fp);
1530 lineLen += nameLen;
1531 }
1532 fputs("\n", state->fp);
1533 }
1535 static void eps_define_fonts(eps_state *state)
1536 {
1537 eps_font *ef;
1538 if (!state->font_list)
1539 return;
1540 for (ef = state->font_list; ef; ef = ef->next) {
1541 /* PostScript¨ LANGUAGE REFERENCE third edition
1542 page 349 */
1543 fprintf(state->fp,
1544 "%%\n"
1545 "/%s findfont dup length dict begin\n"
1546 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1547 "/Encoding ISOLatin1Encoding def\n"
1548 "currentdict end\n"
1549 "/%s-ISOLatin1 exch definefont pop\n"
1550 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1551 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1552 }
1553 }
1555 static int eps_prologue(eps_state *state)
1556 {
1557 gfx_node_t *node;
1558 fputs(
1559 "%!PS-Adobe-3.0 EPSF-3.0\n"
1560 "%%Creator: RRDtool 1.2.4 Tobias Oetiker, http://tobi.oetiker.ch\n"
1561 /* can't like weird chars here */
1562 "%%Title: (RRDtool output)\n"
1563 "%%DocumentData: Clean7Bit\n"
1564 "", state->fp);
1565 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1566 state->page_width, state->page_height);
1567 for (node = state->canvas->firstnode; node; node = node->next) {
1568 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1569 return -1;
1570 }
1571 eps_list_fonts(state, "%%DocumentFonts:");
1572 eps_list_fonts(state, "%%DocumentNeededFonts:");
1573 fputs(
1574 "%%EndComments\n"
1575 "%%BeginProlog\n"
1576 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1577 "/bd { bind def } bind def\n"
1578 "", state->fp);
1579 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1580 fputs(
1581 "/X2 {X exch X exch} bd\n"
1582 "/M {X2 moveto} bd\n"
1583 "/L {X2 lineto} bd\n"
1584 "/m {moveto} bd\n"
1585 "/l {lineto} bd\n"
1586 "/S {stroke} bd\n"
1587 "/CP {closepath} bd\n"
1588 "/WS {setlinewidth stroke} bd\n"
1589 "/F {fill} bd\n"
1590 "/T1 {gsave} bd\n"
1591 "/T2 {concat 0 0 moveto show grestore} bd\n"
1592 "/T {moveto show} bd\n"
1593 "/Rgb { 255.0 div 3 1 roll\n"
1594 " 255.0 div 3 1 roll \n"
1595 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1596 "", state->fp);
1597 eps_define_fonts(state);
1598 return 0;
1599 }
1601 static void eps_clear_dash(eps_state *state)
1602 {
1603 if (!state->has_dash)
1604 return;
1605 state->has_dash = 0;
1606 fputs("[1 0] 0 setdash\n", state->fp);
1607 }
1609 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1610 {
1611 int i;
1612 FILE *fp = state->fp;
1613 int useOffset = 0;
1614 int clearDashIfAny = 1;
1615 eps_set_color(state, node->color);
1616 if (node->type == GFX_LINE) {
1617 svg_dash dash_info;
1618 if (state->linecap != 1) {
1619 fputs("1 setlinecap\n", fp);
1620 state->linecap = 1;
1621 }
1622 if (state->linejoin != 1) {
1623 fputs("1 setlinejoin\n", fp);
1624 state->linejoin = 1;
1625 }
1626 svg_get_dash(node, &dash_info);
1627 if (dash_info.dash_enable) {
1628 clearDashIfAny = 0;
1629 state->has_dash = 1;
1630 fputs("[", fp);
1631 svg_write_number(fp, dash_info.adjusted_on);
1632 fputs(" ", fp);
1633 svg_write_number(fp, dash_info.adjusted_off);
1634 fputs("] ", fp);
1635 svg_write_number(fp, dash_info.dash_offset);
1636 fputs(" setdash\n", fp);
1637 }
1638 }
1639 if (clearDashIfAny)
1640 eps_clear_dash(state);
1641 for (i = 0; i < node->points; i++) {
1642 ArtVpath *vec = node->path + i;
1643 double x = vec->x;
1644 double y = state->page_height - vec->y;
1645 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1646 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1647 if (useOffset) {
1648 x -= LINEOFFSET;
1649 y -= LINEOFFSET;
1650 }
1651 switch (vec->code) {
1652 case ART_MOVETO_OPEN: /* fall-through */
1653 case ART_MOVETO:
1654 svg_write_number(fp, x);
1655 fputc(' ', fp);
1656 svg_write_number(fp, y);
1657 fputc(' ', fp);
1658 fputs(useOffset ? "M\n" : "m\n", fp);
1659 break;
1660 case ART_LINETO:
1661 svg_write_number(fp, x);
1662 fputc(' ', fp);
1663 svg_write_number(fp, y);
1664 fputc(' ', fp);
1665 fputs(useOffset ? "L\n" : "l\n", fp);
1666 break;
1667 case ART_CURVETO: break; /* unsupported */
1668 case ART_END: break; /* nop */
1669 }
1670 }
1671 if (node->type == GFX_LINE) {
1672 if (node->closed_path)
1673 fputs("CP ", fp);
1674 if (node->size != state->line_width) {
1675 state->line_width = node->size;
1676 svg_write_number(fp, state->line_width);
1677 fputs(" WS\n", fp);
1678 } else {
1679 fputs("S\n", fp);
1680 }
1681 } else {
1682 fputs("F\n", fp);
1683 }
1684 }
1686 static void eps_write_text(eps_state *state, gfx_node_t *node)
1687 {
1688 FILE *fp = state->fp;
1689 const unsigned char *p;
1690 const char *ps_font = afm_get_font_postscript_name(node->filename);
1691 int lineLen = 0;
1692 pdf_coords g;
1693 pdf_calc(state->page_height, node, &g);
1694 eps_set_color(state, node->color);
1695 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1696 state->font = ps_font;
1697 state->font_size = node->size;
1698 svg_write_number(fp, state->font_size);
1699 fprintf(fp, " SetFont-%s\n", state->font);
1700 }
1701 if (node->angle)
1702 fputs("T1 ", fp);
1703 fputs("(", fp);
1704 lineLen = 20;
1705 for (p = (const unsigned char*)node->text; *p; p++) {
1706 if (lineLen > 70) {
1707 fputs("\\\n", fp); /* backslash and \n */
1708 lineLen = 0;
1709 }
1710 switch (*p) {
1711 case '(':
1712 case ')':
1713 case '\\':
1714 case '\n':
1715 case '\r':
1716 case '\t':
1717 fputc('\\', fp);
1718 lineLen++;
1719 /* fall-through */
1720 default:
1721 if (*p >= 126)
1722 fprintf(fp, "\\%03o", *p);
1723 else
1724 fputc(*p, fp);
1725 lineLen++;
1726 }
1727 }
1728 if (node->angle) {
1729 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1730 skewed text */
1731 fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
1732 g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
1733 } else {
1734 fputs(") ", fp);
1735 svg_write_number(fp, g.tmx);
1736 fputs(" ", fp);
1737 svg_write_number(fp, g.tmy);
1738 fputs(" T\n", fp);
1739 }
1740 }
1742 static int eps_write_content(eps_state *state)
1743 {
1744 gfx_node_t *node;
1745 fputs("%\n", state->fp);
1746 for (node = state->canvas->firstnode; node; node = node->next) {
1747 switch (node->type) {
1748 case GFX_LINE:
1749 case GFX_AREA:
1750 eps_write_linearea(state, node);
1751 break;
1752 case GFX_TEXT:
1753 eps_write_text(state, node);
1754 break;
1755 }
1756 }
1757 return 0;
1758 }
1760 int gfx_render_eps (gfx_canvas_t *canvas,
1761 art_u32 width, art_u32 height,
1762 gfx_color_t background, FILE *fp){
1763 struct eps_state state;
1764 state.fp = fp;
1765 state.canvas = canvas;
1766 state.page_width = width;
1767 state.page_height = height;
1768 state.font = "no-default-font";
1769 state.font_size = -1;
1770 state.color = 0; /* black */
1771 state.font_list = NULL;
1772 state.linecap = -1;
1773 state.linejoin = -1;
1774 state.has_dash = 0;
1775 if (eps_prologue(&state) == -1)
1776 return -1;
1777 eps_set_color(&state, background);
1778 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1779 height, width, height, width);
1780 if (eps_write_content(&state) == -1)
1781 return 0;
1782 fputs("showpage\n", fp);
1783 fputs("%%EOF\n", fp);
1784 while (state.font_list) {
1785 eps_font *next = state.font_list->next;
1786 free(state.font_list);
1787 state.font_list = next;
1788 }
1789 return 0;
1790 }
1792 /* ------- PDF -------
1793 PDF references page:
1794 http://partners.adobe.com/public/developer/pdf/index_reference.html
1795 */
1797 typedef struct pdf_buffer
1798 {
1799 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1800 char *data;
1801 int alloc_size, current_size;
1802 struct pdf_buffer *previous_buffer, *next_buffer;
1803 struct pdf_state *state;
1804 } pdf_buffer;
1806 typedef struct pdf_font
1807 {
1808 const char *ps_font;
1809 pdf_buffer obj;
1810 struct pdf_font *next;
1811 } pdf_font;
1813 typedef struct pdf_state
1814 {
1815 FILE *fp;
1816 gfx_canvas_t *canvas;
1817 art_u32 page_width, page_height;
1818 pdf_font *font_list;
1819 pdf_buffer *first_buffer, *last_buffer;
1820 int pdf_file_pos;
1821 int has_failed;
1822 /*--*/
1823 gfx_color_t stroke_color, fill_color;
1824 int font_id;
1825 double font_size;
1826 double line_width;
1827 svg_dash dash;
1828 int linecap, linejoin;
1829 int last_obj_id;
1830 /*--*/
1831 pdf_buffer pdf_header;
1832 pdf_buffer catalog_obj, pages_obj, page1_obj;
1833 pdf_buffer fontsdict_obj;
1834 pdf_buffer graph_stream;
1835 } pdf_state;
1837 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1838 {
1839 int initial_size = 32;
1840 buf->state = state;
1841 buf->id = -42;
1842 buf->alloc_size = 0;
1843 buf->current_size = 0;
1844 buf->data = (char*)malloc(initial_size);
1845 buf->is_obj = 0;
1846 buf->previous_buffer = NULL;
1847 buf->next_buffer = NULL;
1848 if (buf->data == NULL) {
1849 rrd_set_error("malloc for pdf_buffer data");
1850 state->has_failed = 1;
1851 return;
1852 }
1853 buf->alloc_size = initial_size;
1854 if (state->last_buffer)
1855 state->last_buffer->next_buffer = buf;
1856 if (state->first_buffer == NULL)
1857 state->first_buffer = buf;
1858 buf->previous_buffer = state->last_buffer;
1859 state->last_buffer = buf;
1860 }
1862 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1863 {
1864 if (len <= 0)
1865 return;
1866 if (buf->alloc_size < buf->current_size + len) {
1867 int new_size = buf->alloc_size;
1868 char *new_buf;
1869 while (new_size < buf->current_size + len)
1870 new_size *= 4;
1871 new_buf = (char*)malloc(new_size);
1872 if (new_buf == NULL) {
1873 rrd_set_error("re-malloc for pdf_buffer data");
1874 buf->state->has_failed = 1;
1875 return;
1876 }
1877 memcpy(new_buf, buf->data, buf->current_size);
1878 free(buf->data);
1879 buf->data = new_buf;
1880 buf->alloc_size = new_size;
1881 }
1882 memcpy(buf->data + buf->current_size, text, len);
1883 buf->current_size += len;
1884 }
1886 static void pdf_puts(pdf_buffer *buf, const char *text)
1887 {
1888 pdf_put(buf, text, strlen(text));
1889 }
1891 static void pdf_indent(pdf_buffer *buf)
1892 {
1893 pdf_puts(buf, "\t");
1894 }
1896 static void pdf_putsi(pdf_buffer *buf, const char *text)
1897 {
1898 pdf_indent(buf);
1899 pdf_puts(buf, text);
1900 }
1902 static void pdf_putint(pdf_buffer *buf, int i)
1903 {
1904 char tmp[20];
1905 sprintf(tmp, "%d", i);
1906 pdf_puts(buf, tmp);
1907 }
1909 static void pdf_putnumber(pdf_buffer *buf, double d)
1910 {
1911 char tmp[50];
1912 svg_format_number(tmp, sizeof(tmp), d);
1913 pdf_puts(buf, tmp);
1914 }
1916 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
1917 {
1918 pdf_init_buffer(state, buf);
1919 buf->id = ++state->last_obj_id;
1920 buf->is_obj = 1;
1921 buf->is_stream = 0;
1922 }
1924 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
1925 {
1926 pdf_init_object(state, buf);
1927 buf->is_dict = 1;
1928 }
1930 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
1931 gfx_color_t *current_color, const char *op)
1932 {
1933 #if USE_PDF_FAKE_ALPHA
1934 double a1, a2;
1935 #endif
1936 /* gfx_color_t is RRGGBBAA */
1937 if (*current_color == color)
1938 return;
1939 #if USE_PDF_FAKE_ALPHA
1940 a1 = (color & 255) / 255.0;
1941 a2 = 1 - a1;
1942 #define pdf_color_calc(x) ( ((x) & 255) / 255.0 * a1 + a2)
1943 #else
1944 #define pdf_color_calc(x) ( ((x) & 255) / 255.0)
1945 #endif
1946 pdf_putnumber(buf, pdf_color_calc(color >> 24));
1947 pdf_puts(buf, " ");
1948 pdf_putnumber(buf, pdf_color_calc(color >> 16));
1949 pdf_puts(buf, " ");
1950 pdf_putnumber(buf, pdf_color_calc(color >> 8));
1951 pdf_puts(buf, " ");
1952 pdf_puts(buf, op);
1953 pdf_puts(buf, "\n");
1954 *current_color = color;
1955 }
1957 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
1958 {
1959 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
1960 }
1962 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
1963 {
1964 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
1965 }
1967 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
1968 {
1969 const char *ps_font = afm_get_font_postscript_name(node->filename);
1970 pdf_font *ef;
1971 for (ef = state->font_list; ef; ef = ef->next) {
1972 if (!strcmp(ps_font, ef->ps_font))
1973 return ef;
1974 }
1975 return NULL;
1976 }
1978 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
1979 {
1980 pdf_font *ef = pdf_find_font(state, node);
1981 if (ef)
1982 return;
1983 ef = malloc(sizeof(pdf_font));
1984 if (ef == NULL) {
1985 rrd_set_error("malloc for pdf_font");
1986 state->has_failed = 1;
1987 return;
1988 }
1989 pdf_init_dict(state, &ef->obj);
1990 ef->next = state->font_list;
1991 ef->ps_font = afm_get_font_postscript_name(node->filename);
1992 state->font_list = ef;
1993 /* fonts dict */
1994 pdf_putsi(&state->fontsdict_obj, "/F");
1995 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1996 pdf_puts(&state->fontsdict_obj, " ");
1997 pdf_putint(&state->fontsdict_obj, ef->obj.id);
1998 pdf_puts(&state->fontsdict_obj, " 0 R\n");
1999 /* fonts def */
2000 pdf_putsi(&ef->obj, "/Type /Font\n");
2001 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
2002 pdf_putsi(&ef->obj, "/Name /F");
2003 pdf_putint(&ef->obj, ef->obj.id);
2004 pdf_puts(&ef->obj, "\n");
2005 pdf_putsi(&ef->obj, "/BaseFont /");
2006 pdf_puts(&ef->obj, ef->ps_font);
2007 pdf_puts(&ef->obj, "\n");
2008 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
2009 /* 'Cp1252' (this is latin 1 extended with 27 characters;
2010 the encoding is also known as 'winansi')
2011 http://www.lowagie.com/iText/tutorial/ch09.html */
2012 }
2014 static void pdf_create_fonts(pdf_state *state)
2015 {
2016 gfx_node_t *node;
2017 for (node = state->canvas->firstnode; node; node = node->next) {
2018 if (node->type == GFX_TEXT)
2019 pdf_add_font(state, node);
2020 }
2021 }
2023 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
2024 {
2025 int i;
2026 pdf_buffer *s = &state->graph_stream;
2027 if (node->type == GFX_LINE) {
2028 svg_dash dash_info;
2029 svg_get_dash(node, &dash_info);
2030 if (!svg_dash_equal(&dash_info, &state->dash)) {
2031 state->dash = dash_info;
2032 if (dash_info.dash_enable) {
2033 pdf_puts(s, "[");
2034 pdf_putnumber(s, dash_info.adjusted_on);
2035 pdf_puts(s, " ");
2036 pdf_putnumber(s, dash_info.adjusted_off);
2037 pdf_puts(s, "] ");
2038 pdf_putnumber(s, dash_info.dash_offset);
2039 pdf_puts(s, " d\n");
2040 } else {
2041 pdf_puts(s, "[] 0 d\n");
2042 }
2043 }
2044 pdf_set_stroke_color(s, node->color);
2045 if (state->linecap != 1) {
2046 pdf_puts(s, "1 j\n");
2047 state->linecap = 1;
2048 }
2049 if (state->linejoin != 1) {
2050 pdf_puts(s, "1 J\n");
2051 state->linejoin = 1;
2052 }
2053 if (node->size != state->line_width) {
2054 state->line_width = node->size;
2055 pdf_putnumber(s, state->line_width);
2056 pdf_puts(s, " w\n");
2057 }
2058 } else {
2059 pdf_set_fill_color(s, node->color);
2060 }
2061 for (i = 0; i < node->points; i++) {
2062 ArtVpath *vec = node->path + i;
2063 double x = vec->x;
2064 double y = state->page_height - vec->y;
2065 if (node->type == GFX_AREA) {
2066 x += LINEOFFSET; /* adjust for libart handling of areas */
2067 y -= LINEOFFSET;
2068 }
2069 switch (vec->code) {
2070 case ART_MOVETO_OPEN: /* fall-through */
2071 case ART_MOVETO:
2072 pdf_putnumber(s, x);
2073 pdf_puts(s, " ");
2074 pdf_putnumber(s, y);
2075 pdf_puts(s, " m\n");
2076 break;
2077 case ART_LINETO:
2078 pdf_putnumber(s, x);
2079 pdf_puts(s, " ");
2080 pdf_putnumber(s, y);
2081 pdf_puts(s, " l\n");
2082 break;
2083 case ART_CURVETO: break; /* unsupported */
2084 case ART_END: break; /* nop */
2085 }
2086 }
2087 if (node->type == GFX_LINE) {
2088 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
2089 } else {
2090 pdf_puts(s, "f\n");
2091 }
2092 }
2095 static void pdf_write_matrix(pdf_state *state, gfx_node_t *node, pdf_coords *g, int useTM)
2096 {
2097 char tmp[150];
2098 pdf_buffer *s = &state->graph_stream;
2099 if (node->angle == 0) {
2100 pdf_puts(s, "1 0 0 1 ");
2101 pdf_putnumber(s, useTM ? g->tmx : g->mx);
2102 pdf_puts(s, " ");
2103 pdf_putnumber(s, useTM ? g->tmy : g->my);
2104 } else {
2105 /* can't use svg_write_number as 2 decimals is far from enough to avoid
2106 skewed text */
2107 sprintf(tmp, "%f %f %f %f %f %f",
2108 g->ma, g->mb, g->mc, g->md,
2109 useTM ? g->tmx : g->mx,
2110 useTM ? g->tmy : g->my);
2111 pdf_puts(s, tmp);
2112 }
2113 }
2115 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
2116 int last_was_text, int next_is_text)
2117 {
2118 pdf_coords g;
2119 pdf_buffer *s = &state->graph_stream;
2120 const unsigned char *p;
2121 pdf_font *font = pdf_find_font(state, node);
2122 if (font == NULL) {
2123 rrd_set_error("font disappeared");
2124 state->has_failed = 1;
2125 return;
2126 }
2127 pdf_calc(state->page_height, node, &g);
2128 #if PDF_CALC_DEBUG
2129 pdf_puts(s, "q % debug green box\n");
2130 pdf_write_matrix(state, node, &g, 0);
2131 pdf_puts(s, " cm\n");
2132 pdf_set_fill_color(s, 0x90FF9000);
2133 pdf_puts(s, "0 0.4 0 rg\n");
2134 pdf_puts(s, "0 0 ");
2135 pdf_putnumber(s, g.sizep.x);
2136 pdf_puts(s, " ");
2137 pdf_putnumber(s, g.sizep.y);
2138 pdf_puts(s, " re\n");
2139 pdf_puts(s, "f\n");
2140 pdf_puts(s, "Q\n");
2141 #endif
2142 pdf_set_fill_color(s, node->color);
2143 if (PDF_CALC_DEBUG || !last_was_text)
2144 pdf_puts(s, "BT\n");
2145 if (state->font_id != font->obj.id || node->size != state->font_size) {
2146 state->font_id = font->obj.id;
2147 state->font_size = node->size;
2148 pdf_puts(s, "/F");
2149 pdf_putint(s, font->obj.id);
2150 pdf_puts(s, " ");
2151 pdf_putnumber(s, node->size);
2152 pdf_puts(s, " Tf\n");
2153 }
2154 pdf_write_matrix(state, node, &g, 1);
2155 pdf_puts(s, " Tm\n");
2156 pdf_puts(s, "(");
2157 for (p = (const unsigned char*)node->text; *p; p++) {
2158 char tmp[30];
2159 switch (*p) {
2160 case '(':
2161 case ')':
2162 case '\\':
2163 case '\n':
2164 case '\r':
2165 case '\t':
2166 pdf_puts(s, "\\");
2167 /* fall-through */
2168 default:
2169 if (*p >= 126) {
2170 snprintf(tmp, sizeof(tmp), "\\%03o", *p);
2171 pdf_puts(s, tmp);
2172 } else {
2173 pdf_put(s, (const char*)p, 1);
2174 }
2175 }
2176 }
2177 pdf_puts(s, ") Tj\n");
2178 if (PDF_CALC_DEBUG || !next_is_text)
2179 pdf_puts(s, "ET\n");
2180 }
2182 static void pdf_write_content(pdf_state *state)
2183 {
2184 gfx_node_t *node;
2185 int last_was_text = 0, next_is_text;
2186 for (node = state->canvas->firstnode; node; node = node->next) {
2187 switch (node->type) {
2188 case GFX_LINE:
2189 case GFX_AREA:
2190 pdf_write_linearea(state, node);
2191 break;
2192 case GFX_TEXT:
2193 next_is_text = node->next && node->next->type == GFX_TEXT;
2194 pdf_write_text(state, node, last_was_text, next_is_text);
2195 break;
2196 }
2197 last_was_text = node->type == GFX_TEXT;
2198 }
2199 }
2201 static void pdf_init_document(pdf_state *state)
2202 {
2203 pdf_init_buffer(state, &state->pdf_header);
2204 pdf_init_dict(state, &state->catalog_obj);
2205 pdf_init_dict(state, &state->pages_obj);
2206 pdf_init_dict(state, &state->page1_obj);
2207 pdf_init_dict(state, &state->fontsdict_obj);
2208 pdf_create_fonts(state);
2209 if (state->has_failed)
2210 return;
2211 /* make stream last object in file */
2212 pdf_init_object(state, &state->graph_stream);
2213 state->graph_stream.is_stream = 1;
2214 }
2216 static void pdf_setup_document(pdf_state *state)
2217 {
2218 /* all objects created by now, so init code can reference them */
2219 /* HEADER */
2220 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2221 /* following 8 bit comment is recommended by Adobe for
2222 indicating binary file to file transfer applications */
2223 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2224 /* CATALOG */
2225 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2226 pdf_putsi(&state->catalog_obj, "/Pages ");
2227 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2228 pdf_puts(&state->catalog_obj, " 0 R\n");
2229 /* PAGES */
2230 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2231 pdf_putsi(&state->pages_obj, "/Kids [");
2232 pdf_putint(&state->pages_obj, state->page1_obj.id);
2233 pdf_puts(&state->pages_obj, " 0 R]\n");
2234 pdf_putsi(&state->pages_obj, "/Count 1\n");
2235 /* PAGE 1 */
2236 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2237 pdf_putsi(&state->page1_obj, "/Parent ");
2238 pdf_putint(&state->page1_obj, state->pages_obj.id);
2239 pdf_puts(&state->page1_obj, " 0 R\n");
2240 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2241 pdf_putint(&state->page1_obj, state->page_width);
2242 pdf_puts(&state->page1_obj, " ");
2243 pdf_putint(&state->page1_obj, state->page_height);
2244 pdf_puts(&state->page1_obj, "]\n");
2245 pdf_putsi(&state->page1_obj, "/Contents ");
2246 pdf_putint(&state->page1_obj, state->graph_stream.id);
2247 pdf_puts(&state->page1_obj, " 0 R\n");
2248 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2249 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2250 pdf_puts(&state->page1_obj, " 0 R >>\n");
2251 }
2253 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2254 {
2255 fputs(text, state->fp);
2256 state->pdf_file_pos += strlen(text);
2257 }
2259 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2260 {
2261 char tmp[40];
2262 buf->pdf_file_pos = state->pdf_file_pos;
2263 if (buf->is_obj) {
2264 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2265 pdf_write_string_to_file(state, tmp);
2266 }
2267 if (buf->is_dict)
2268 pdf_write_string_to_file(state, "<<\n");
2269 if (buf->is_stream) {
2270 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2271 pdf_write_string_to_file(state, tmp);
2272 pdf_write_string_to_file(state, "stream\n");
2273 }
2274 fwrite(buf->data, 1, buf->current_size, state->fp);
2275 state->pdf_file_pos += buf->current_size;
2276 if (buf->is_stream)
2277 pdf_write_string_to_file(state, "endstream\n");
2278 if (buf->is_dict)
2279 pdf_write_string_to_file(state, ">>\n");
2280 if (buf->is_obj)
2281 pdf_write_string_to_file(state, "endobj\n");
2282 }
2284 static void pdf_write_to_file(pdf_state *state)
2285 {
2286 pdf_buffer *buf = state->first_buffer;
2287 int xref_pos;
2288 state->pdf_file_pos = 0;
2289 pdf_write_buf_to_file(state, &state->pdf_header);
2290 while (buf) {
2291 if (buf->is_obj)
2292 pdf_write_buf_to_file(state, buf);
2293 buf = buf->next_buffer;
2294 }
2295 xref_pos = state->pdf_file_pos;
2296 fprintf(state->fp, "xref\n");
2297 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2298 /* TOC lines must be exactly 20 bytes including \n */
2299 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2300 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2301 if (buf->is_obj)
2302 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2303 }
2304 fprintf(state->fp, "trailer\n");
2305 fprintf(state->fp, "<<\n");
2306 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2307 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2308 fprintf(state->fp, ">>\n");
2309 fprintf(state->fp, "startxref\n");
2310 fprintf(state->fp, "%d\n", xref_pos);
2311 fputs("%%EOF\n", state->fp);
2312 }
2314 static void pdf_free_resources(pdf_state *state)
2315 {
2316 pdf_buffer *buf = state->first_buffer;
2317 while (buf) {
2318 free(buf->data);
2319 buf->data = NULL;
2320 buf->alloc_size = buf->current_size = 0;
2321 buf = buf->next_buffer;
2322 }
2323 while (state->font_list) {
2324 pdf_font *next = state->font_list->next;
2325 free(state->font_list);
2326 state->font_list = next;
2327 }
2328 }
2330 int gfx_render_pdf (gfx_canvas_t *canvas,
2331 art_u32 width, art_u32 height,
2332 gfx_color_t background, FILE *fp){
2333 struct pdf_state state;
2334 memset(&state, 0, sizeof(pdf_state));
2335 state.fp = fp;
2336 state.canvas = canvas;
2337 state.page_width = width;
2338 state.page_height = height;
2339 state.font_id = -1;
2340 state.font_size = -1;
2341 state.font_list = NULL;
2342 state.linecap = -1;
2343 state.linejoin = -1;
2344 pdf_init_document(&state);
2345 /*
2346 pdf_set_color(&state, background);
2347 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2348 height, width, height, width);
2349 */
2350 if (!state.has_failed)
2351 pdf_write_content(&state);
2352 if (!state.has_failed)
2353 pdf_setup_document(&state);
2354 if (!state.has_failed)
2355 pdf_write_to_file(&state);
2356 pdf_free_resources(&state);
2357 return state.has_failed ? -1 : 0;
2358 }