1 /****************************************************************************
2 * RRDtool 1.2.8 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"
22 #include "unused.h"
24 /* lines are better drawn on the pixle than between pixles */
25 #define LINEOFFSET 0.5
27 #define USE_PDF_FAKE_ALPHA 1
28 #define USE_EPS_FAKE_ALPHA 1
30 typedef struct gfx_char_s *gfx_char;
31 struct gfx_char_s {
32 FT_UInt index; /* glyph index */
33 FT_Vector pos; /* location from baseline in 26.6 */
34 FT_Glyph image; /* glyph bitmap */
35 };
37 typedef struct gfx_string_s *gfx_string;
38 struct gfx_string_s {
39 unsigned int width;
40 unsigned int height;
41 size_t count; /* number of characters */
42 gfx_char glyphs;
43 size_t num_glyphs;
44 FT_BBox bbox;
45 FT_Matrix transform;
46 };
48 /* compute string bbox */
49 static void compute_string_bbox(gfx_string string);
51 /* create a freetype glyph string */
52 gfx_string gfx_string_create ( gfx_canvas_t *canvas, FT_Face face,
53 const char *text, int rotation, double tabwidth, double size);
55 /* create a freetype glyph string */
56 static void gfx_string_destroy ( gfx_string string );
58 static
59 gfx_node_t *gfx_new_node( gfx_canvas_t *canvas,enum gfx_en type){
60 gfx_node_t *node = art_new(gfx_node_t,1);
61 if (node == NULL) return NULL;
62 node->type = type;
63 node->color = 0x0; /* color of element 0xRRGGBBAA alpha 0xff is solid*/
64 node->size =0.0; /* font size, line width */
65 node->path = NULL; /* path */
66 node->points = 0;
67 node->points_max =0;
68 node->closed_path = 0;
69 node->filename = NULL; /* font or image filename */
70 node->text = NULL;
71 node->x = 0.0;
72 node->y = 0.0; /* position */
73 node->angle = 0;
74 node->halign = GFX_H_NULL; /* text alignement */
75 node->valign = GFX_V_NULL; /* text alignement */
76 node->tabwidth = 0.0;
77 node->next = NULL;
78 if (canvas->lastnode != NULL){
79 canvas->lastnode->next = node;
80 }
81 if (canvas->firstnode == NULL){
82 canvas->firstnode = node;
83 }
84 canvas->lastnode = node;
85 return node;
86 }
88 gfx_canvas_t *gfx_new_canvas (void) {
89 gfx_canvas_t *canvas = art_new(gfx_canvas_t,1);
90 canvas->firstnode = NULL;
91 canvas->lastnode = NULL;
92 canvas->imgformat = IF_PNG; /* we default to PNG output */
93 canvas->interlaced = 0;
94 canvas->zoom = 1.0;
95 canvas->font_aa_threshold = -1.0;
96 canvas->aa_type = AA_NORMAL;
97 return canvas;
98 }
100 /* create a new line */
101 gfx_node_t *gfx_new_line(gfx_canvas_t *canvas,
102 double X0, double Y0,
103 double X1, double Y1,
104 double width, gfx_color_t color){
105 return gfx_new_dashed_line(canvas, X0, Y0, X1, Y1, width, color, 0, 0);
106 }
108 gfx_node_t *gfx_new_dashed_line(gfx_canvas_t *canvas,
109 double X0, double Y0,
110 double X1, double Y1,
111 double width, gfx_color_t color,
112 double dash_on, double dash_off){
114 gfx_node_t *node;
115 ArtVpath *vec;
116 node = gfx_new_node(canvas,GFX_LINE);
117 if (node == NULL) return NULL;
118 vec = art_new(ArtVpath, 3);
119 if (vec == NULL) return NULL;
120 vec[0].code = ART_MOVETO_OPEN; vec[0].x=X0+LINEOFFSET; vec[0].y=Y0+LINEOFFSET;
121 vec[1].code = ART_LINETO; vec[1].x=X1+LINEOFFSET; vec[1].y=Y1+LINEOFFSET;
122 vec[2].code = ART_END; vec[2].x=0;vec[2].y=0;
124 node->points = 3;
125 node->points_max = 3;
126 node->color = color;
127 node->size = width;
128 node->dash_on = dash_on;
129 node->dash_off = dash_off;
130 node->path = vec;
131 return node;
132 }
134 /* create a new area */
135 gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,
136 double X0, double Y0,
137 double X1, double Y1,
138 double X2, double Y2,
139 gfx_color_t color) {
141 gfx_node_t *node;
142 ArtVpath *vec;
143 node = gfx_new_node(canvas,GFX_AREA);
144 if (node == NULL) return NULL;
145 vec = art_new(ArtVpath, 5);
146 if (vec == NULL) return NULL;
147 vec[0].code = ART_MOVETO; vec[0].x=X0; vec[0].y=Y0;
148 vec[1].code = ART_LINETO; vec[1].x=X1; vec[1].y=Y1;
149 vec[2].code = ART_LINETO; vec[2].x=X2; vec[2].y=Y2;
150 vec[3].code = ART_LINETO; vec[3].x=X0; vec[3].y=Y0;
151 vec[4].code = ART_END; vec[4].x=0; vec[4].y=0;
153 node->points = 5;
154 node->points_max = 5;
155 node->color = color;
156 node->path = vec;
158 return node;
159 }
161 /* add a point to a line or to an area */
162 int gfx_add_point (gfx_node_t *node,
163 double x, double y){
164 if (node == NULL) return 1;
165 if (node->type == GFX_AREA) {
166 double X0 = node->path[0].x;
167 double Y0 = node->path[0].y;
168 node->points -= 2;
169 art_vpath_add_point (&(node->path),
170 &(node->points),
171 &(node->points_max),
172 ART_LINETO,
173 x,y);
174 art_vpath_add_point (&(node->path),
175 &(node->points),
176 &(node->points_max),
177 ART_LINETO,
178 X0,Y0);
179 art_vpath_add_point (&(node->path),
180 &(node->points),
181 &(node->points_max),
182 ART_END,
183 0,0);
184 } else if (node->type == GFX_LINE) {
185 node->points -= 1;
186 art_vpath_add_point (&(node->path),
187 &(node->points),
188 &(node->points_max),
189 ART_LINETO,
190 x+LINEOFFSET,y+LINEOFFSET);
191 art_vpath_add_point (&(node->path),
192 &(node->points),
193 &(node->points_max),
194 ART_END,
195 0,0);
197 } else {
198 /* can only add point to areas and lines */
199 return 1;
200 }
201 return 0;
202 }
204 void gfx_close_path (gfx_node_t *node) {
205 node->closed_path = 1;
206 if (node->path[0].code == ART_MOVETO_OPEN)
207 node->path[0].code = ART_MOVETO;
208 }
210 /* create a text node */
211 gfx_node_t *gfx_new_text (gfx_canvas_t *canvas,
212 double x, double y, gfx_color_t color,
213 char* font, double size,
214 double tabwidth, double angle,
215 enum gfx_h_align_en h_align,
216 enum gfx_v_align_en v_align,
217 char* text){
218 gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT);
220 node->text = strdup(text);
221 node->size = size;
222 node->filename = strdup(font);
223 node->x = x;
224 node->y = y;
225 node->angle = angle;
226 node->color = color;
227 node->tabwidth = tabwidth;
228 node->halign = h_align;
229 node->valign = v_align;
230 #if 0
231 /* debugging: show text anchor
232 green is along x-axis, red is downward y-axis */
233 if (1) {
234 double a = 2 * M_PI * -node->angle / 360.0;
235 double cos_a = cos(a);
236 double sin_a = sin(a);
237 double len = 3;
238 gfx_new_line(canvas,
239 x, y,
240 x + len * cos_a, y - len * sin_a,
241 0.2, 0x00FF0000);
242 gfx_new_line(canvas,
243 x, y,
244 x + len * sin_a, y + len * cos_a,
245 0.2, 0xFF000000);
246 }
247 #endif
248 return node;
249 }
251 int gfx_render(gfx_canvas_t *canvas,
252 art_u32 width, art_u32 height,
253 gfx_color_t background, FILE *fp){
254 switch (canvas->imgformat) {
255 case IF_PNG:
256 return gfx_render_png (canvas, width, height, background, fp);
257 case IF_SVG:
258 return gfx_render_svg (canvas, width, height, background, fp);
259 case IF_EPS:
260 return gfx_render_eps (canvas, width, height, background, fp);
261 case IF_PDF:
262 return gfx_render_pdf (canvas, width, height, background, fp);
263 default:
264 return -1;
265 }
266 }
268 static void gfx_string_destroy ( gfx_string string ) {
269 unsigned int n;
270 if (string->glyphs) {
271 for (n=0; n<string->num_glyphs; ++n)
272 FT_Done_Glyph (string->glyphs[n].image);
273 free (string->glyphs);
274 }
275 free (string);
276 }
279 double gfx_get_text_width ( gfx_canvas_t *canvas,
280 double start, char* font, double size,
281 double tabwidth, char* text, int rotation){
282 switch (canvas->imgformat) {
283 case IF_PNG:
284 return gfx_get_text_width_libart (canvas, start, font, size, tabwidth, text, rotation);
285 case IF_SVG: /* fall through */
286 case IF_EPS:
287 case IF_PDF:
288 return afm_get_text_width(start, font, size, tabwidth, text);
289 default:
290 return size * strlen(text);
291 }
292 }
294 double gfx_get_text_width_libart (
295 gfx_canvas_t *canvas, double UNUSED(start), char* font, double size,
296 double tabwidth, char* text, int rotation ){
298 int error;
299 double text_width=0;
300 FT_Face face;
301 FT_Library library=NULL;
302 gfx_string string;
304 FT_Init_FreeType( &library );
305 error = FT_New_Face( library, font, 0, &face );
306 if ( error ) return -1;
307 error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
308 if ( error ) return -1;
310 string = gfx_string_create( canvas, face, text, rotation, tabwidth, size );
311 text_width = string->width;
312 gfx_string_destroy(string);
313 FT_Done_FreeType(library);
314 return text_width/64;
315 }
317 static void gfx_libart_close_path(gfx_node_t *node, ArtVpath **vec)
318 {
319 /* libart must have end==start for closed paths,
320 even if using ART_MOVETO and not ART_MOVETO_OPEN
321 so add extra point which is the same as the starting point */
322 int points_max = node->points; /* scaled array has exact size */
323 int points = node->points - 1;
324 art_vpath_add_point (vec, &points, &points_max, ART_LINETO,
325 (**vec).x, (**vec).y);
326 art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
327 }
330 /* find bbox of a string */
331 static void compute_string_bbox(gfx_string string) {
332 unsigned int n;
333 FT_BBox bbox;
335 bbox.xMin = bbox.yMin = 32000;
336 bbox.xMax = bbox.yMax = -32000;
337 for ( n = 0; n < string->num_glyphs; n++ ) {
338 FT_BBox glyph_bbox;
339 FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
340 &glyph_bbox );
341 if (glyph_bbox.xMin < bbox.xMin) {
342 bbox.xMin = glyph_bbox.xMin;
343 }
344 if (glyph_bbox.yMin < bbox.yMin) {
345 bbox.yMin = glyph_bbox.yMin;
346 }
347 if (glyph_bbox.xMax > bbox.xMax) {
348 bbox.xMax = glyph_bbox.xMax;
349 }
350 if (glyph_bbox.yMax > bbox.yMax) {
351 bbox.yMax = glyph_bbox.yMax;
352 }
353 }
354 if ( bbox.xMin > bbox.xMax ) {
355 bbox.xMin = 0;
356 bbox.yMin = 0;
357 bbox.xMax = 0;
358 bbox.yMax = 0;
359 }
360 string->bbox.xMin = bbox.xMin;
361 string->bbox.xMax = bbox.xMax;
362 string->bbox.yMin = bbox.yMin;
363 string->bbox.yMax = bbox.yMax;
364 }
366 /* create a free type glyph string */
367 gfx_string gfx_string_create(gfx_canvas_t *canvas, FT_Face face,const char *text,
368 int rotation, double tabwidth, double size )
369 {
371 FT_GlyphSlot slot = face->glyph; /* a small shortcut */
372 FT_Bool use_kerning;
373 FT_UInt previous;
374 FT_Vector ft_pen;
376 gfx_string string;
377 gfx_char glyph; /* current glyph in table */
378 unsigned int n;
379 int error;
380 int gottab = 0;
381 ft_pen.x = 0; /* start at (0,0) !! */
382 ft_pen.y = 0;
384 string = (gfx_string) malloc (sizeof(struct gfx_string_s));
385 string->width = 0;
386 string->height = 0;
387 string->count = strlen (text);
388 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
389 string->num_glyphs = 0;
390 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
391 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
392 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
393 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
395 use_kerning = FT_HAS_KERNING(face);
396 previous = 0;
397 glyph = string->glyphs;
398 for (n=0; n<string->count;glyph++) {
399 FT_Vector vec;
400 /* handle the tabs ...
401 have a witespace glyph inserted, but set its width such that the distance
402 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
403 unsigned char letter = text[n];
405 gottab = 0;
406 if (letter == '\\' && n+1 < string->count && text[n+1] == 't'){
407 /* we have a tab here so skip the backslash and
408 set t to ' ' so that we get a white space */
409 gottab = 1;
410 n++;
411 letter = ' ';
412 }
413 if (letter == '\t'){
414 letter = ' ';
415 gottab = 1 ;
416 }
417 /* initialize each struct gfx_char_s */
418 glyph->index = 0;
419 glyph->pos.x = 0;
420 glyph->pos.y = 0;
421 glyph->image = NULL;
423 glyph->index = FT_Get_Char_Index( face, letter );
425 /* compute glyph origin */
426 if ( use_kerning && previous && glyph->index ) {
427 FT_Vector kerning;
428 FT_Get_Kerning (face, previous, glyph->index,
429 ft_kerning_default, &kerning);
430 ft_pen.x += kerning.x;
431 ft_pen.y += kerning.y;
432 }
434 /* load the glyph image (in its native format) */
435 /* for now, we take a monochrome glyph bitmap */
436 error = FT_Load_Glyph (face, glyph->index, size > canvas->font_aa_threshold ?
437 canvas->aa_type == AA_NORMAL ? FT_LOAD_TARGET_NORMAL :
438 canvas->aa_type == AA_LIGHT ? FT_LOAD_TARGET_LIGHT :
439 FT_LOAD_TARGET_MONO : FT_LOAD_TARGET_MONO);
440 if (error) {
441 fprintf (stderr, "couldn't load glyph: %c\n", letter);
442 continue;
443 }
444 error = FT_Get_Glyph (slot, &glyph->image);
445 if (error) {
446 fprintf (stderr, "couldn't get glyph from slot: %c\n", letter);
447 continue;
448 }
449 /* if we are in tabbing mode, we replace the tab with a space and shift the position
450 of the space so that its left edge is where the tab was supposed to land us */
451 if (gottab){
452 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
453 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
454 }
455 /* store current pen position */
456 glyph->pos.x = ft_pen.x;
457 glyph->pos.y = ft_pen.y;
460 ft_pen.x += slot->advance.x;
461 ft_pen.y += slot->advance.y;
463 /* rotate glyph */
464 vec = glyph->pos;
465 FT_Vector_Transform (&vec, &string->transform);
466 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
467 if (error) {
468 fprintf (stderr, "couldn't transform glyph\n");
469 continue;
470 }
472 /* convert to a bitmap - destroy native image */
473 error = FT_Glyph_To_Bitmap (&glyph->image, size > canvas->font_aa_threshold ?
474 canvas->aa_type == AA_NORMAL ? FT_RENDER_MODE_NORMAL :
475 canvas->aa_type == AA_LIGHT ? FT_RENDER_MODE_LIGHT :
476 FT_RENDER_MODE_MONO : FT_RENDER_MODE_MONO, 0, 1);
477 if (error) {
478 fprintf (stderr, "couldn't convert glyph to bitmap\n");
479 continue;
480 }
482 /* increment number of glyphs */
483 previous = glyph->index;
484 string->num_glyphs++;
485 n++;
487 }
488 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
489 compute_string_bbox( string );
490 /* the last character was a tab */
491 /* if (gottab) { */
492 string->width = ft_pen.x;
493 /* } else {
494 string->width = string->bbox.xMax - string->bbox.xMin;
495 } */
496 string->height = string->bbox.yMax - string->bbox.yMin;
498 return string;
499 }
502 static int gfx_save_png (art_u8 *buffer, FILE *fp,
503 long width, long height, long bytes_per_pixel);
504 /* render grafics into png image */
506 int gfx_render_png (gfx_canvas_t *canvas,
507 art_u32 width, art_u32 height,
508 gfx_color_t background, FILE *fp){
511 FT_Library library;
512 gfx_node_t *node = canvas->firstnode;
513 /*
514 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
515 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
516 */
517 unsigned long pys_width = width * canvas->zoom;
518 unsigned long pys_height = height * canvas->zoom;
519 const int bytes_per_pixel = 4;
520 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
522 /* fill that buffer with out background color */
523 gfx_color_t *buffp = art_new (gfx_color_t, pys_width*pys_height);
524 art_u8 *buffer = (art_u8 *)buffp;
525 unsigned long i;
526 for (i=0;i<pys_width*pys_height;
527 i++){
528 *(buffp++)=background;
529 }
530 FT_Init_FreeType( &library );
531 while(node){
532 switch (node->type) {
533 case GFX_LINE:
534 case GFX_AREA: {
535 ArtVpath *vec;
536 double dst[6];
537 ArtSVP *svp;
538 art_affine_scale(dst,canvas->zoom,canvas->zoom);
539 vec = art_vpath_affine_transform(node->path,dst);
540 if (node->closed_path)
541 gfx_libart_close_path(node, &vec);
542 /* gfx_round_scaled_coordinates(vec); */
543 /* pvec = art_vpath_perturb(vec);
544 art_free(vec); */
545 if(node->type == GFX_LINE){
546 svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
547 ART_PATH_STROKE_CAP_ROUND,
548 node->size*canvas->zoom,4,0.25);
549 } else {
550 svp = art_svp_from_vpath ( vec );
551 /* this takes time and is unnecessary since we make
552 sure elsewhere that the areas are going clock-whise */
553 /* svpt = art_svp_uncross( svp );
554 art_svp_free(svp);
555 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
556 art_svp_free(svpt);
557 */
558 }
559 art_free(vec);
560 /* this is from gnome since libart does not have this yet */
561 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
562 node->color, buffer, rowstride, NULL);
563 art_svp_free(svp);
564 break;
565 }
566 case GFX_TEXT: {
567 unsigned int n;
568 int error;
569 art_u8 fcolor[4],falpha;
570 FT_Face face;
571 gfx_char glyph;
572 gfx_string string;
573 FT_Vector vec; /* 26.6 */
575 float pen_x = 0.0 , pen_y = 0.0;
576 /* double x,y; */
577 long ix,iy;
579 fcolor[0] = node->color >> 24;
580 fcolor[1] = (node->color >> 16) & 0xff;
581 fcolor[2] = (node->color >> 8) & 0xff;
582 falpha = node->color & 0xff;
583 error = FT_New_Face( library,
584 (char *)node->filename,
585 0,
586 &face );
587 if ( error ) {
588 rrd_set_error("failed to load %s",node->filename);
589 break;
590 }
591 error = FT_Set_Char_Size(face, /* handle to face object */
592 (long)(node->size*64),
593 (long)(node->size*64),
594 (long)(100*canvas->zoom),
595 (long)(100*canvas->zoom));
596 if ( error ) break;
597 pen_x = node->x * canvas->zoom;
598 pen_y = node->y * canvas->zoom;
600 string = gfx_string_create (canvas, face, node->text, node->angle, node->tabwidth, node->size);
601 switch(node->halign){
602 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
603 break;
604 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
605 -string->bbox.xMax/2:-string->bbox.xMin/2;
606 break;
607 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
608 break;
609 case GFX_H_NULL: vec.x = 0;
610 break;
611 }
613 switch(node->valign){
614 case GFX_V_TOP: vec.y = string->bbox.yMax;
615 break;
616 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
617 string->bbox.yMax/2:string->bbox.yMin/2;
618 break;
619 case GFX_V_BOTTOM: vec.y = 0;
620 break;
621 case GFX_V_NULL: vec.y = 0;
622 break;
623 }
624 pen_x += vec.x/64;
625 pen_y += vec.y/64;
626 glyph = string->glyphs;
627 for(n=0; n<string->num_glyphs; ++n, ++glyph) {
628 int gr;
629 FT_Glyph image;
630 FT_BitmapGlyph bit;
631 /* long buf_x,comp_n; */
632 /* make copy to transform */
633 if (! glyph->image) {
634 fprintf (stderr, "no image\n");
635 continue;
636 }
637 error = FT_Glyph_Copy (glyph->image, &image);
638 if (error) {
639 fprintf (stderr, "couldn't copy image\n");
640 continue;
641 }
643 /* transform it */
644 vec = glyph->pos;
645 FT_Vector_Transform (&vec, &string->transform);
647 bit = (FT_BitmapGlyph) image;
648 gr = bit->bitmap.num_grays -1;
649 /*
650 buf_x = (pen_x + 0.5) + (double)bit->left;
651 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
652 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
653 buf_x *= bytes_per_pixel ;
654 for (iy=0; iy < bit->bitmap.rows; iy++){
655 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
656 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
657 buf_y *= rowstride;
658 for (ix=0;ix < bit->bitmap.width;ix++){
659 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
660 }
661 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
662 }
663 art_free(letter);
664 */
665 switch ( bit->bitmap.pixel_mode ) {
666 case FT_PIXEL_MODE_GRAY:
667 for (iy=0; iy < bit->bitmap.rows; iy++){
668 long buf_y = iy+(pen_y+0.5)-bit->top;
669 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
670 buf_y *= rowstride;
671 for (ix=0;ix < bit->bitmap.width;ix++){
672 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
673 art_u8 font_alpha;
675 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
676 buf_x *= bytes_per_pixel ;
677 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix);
678 if (font_alpha > 0){
679 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
680 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
681 }
682 }
683 }
684 break;
686 case FT_PIXEL_MODE_MONO:
687 for (iy=0; iy < bit->bitmap.rows; iy++){
688 long buf_y = iy+(pen_y+0.5)-bit->top;
689 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
690 buf_y *= rowstride;
691 for (ix=0;ix < bit->bitmap.width;ix++){
692 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
694 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
695 buf_x *= bytes_per_pixel ;
696 if ( (fcolor[3] = falpha * ((*(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix/8) >> (7 - (ix % 8))) & 1)) > 0 )
697 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
698 }
699 }
700 break;
702 default:
703 rrd_set_error("unknown freetype pixel mode: %d", bit->bitmap.pixel_mode);
704 break;
705 }
707 /*
708 for (iy=0; iy < bit->bitmap.rows; iy++){
709 long buf_y = iy+(pen_y+0.5)-bit->top;
710 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
711 buf_y *= rowstride;
712 for (ix=0;ix < bit->bitmap.width;ix++){
713 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
714 art_u8 font_alpha;
716 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
717 buf_x *= bytes_per_pixel ;
718 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
719 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
720 for (iz = 0; iz < 3; iz++){
721 art_u8 *orig = buffer + buf_y + buf_x + iz;
722 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
723 (double)fcolor[iz] / gr * (font_alpha));
724 }
725 }
726 }
727 */
728 FT_Done_Glyph (image);
729 }
730 gfx_string_destroy(string);
731 }
732 }
733 node = node->next;
734 }
735 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
736 art_free(buffer);
737 FT_Done_FreeType( library );
738 return 0;
739 }
741 /* free memory used by nodes this will also remove memory required for
742 associated paths and svcs ... but not for text strings */
743 int
744 gfx_destroy (gfx_canvas_t *canvas){
745 gfx_node_t *next,*node = canvas->firstnode;
746 while(node){
747 next = node->next;
748 art_free(node->path);
749 free(node->text);
750 free(node->filename);
751 art_free(node);
752 node = next;
753 }
754 art_free(canvas);
755 return 0;
756 }
758 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
759 png_structp png_ptr = NULL;
760 png_infop info_ptr = NULL;
761 int i;
762 png_bytep *row_pointers;
763 int rowstride = width * bytes_per_pixel;
764 png_text text[2];
766 if (fp == NULL)
767 return (1);
769 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
770 if (png_ptr == NULL)
771 {
772 return (1);
773 }
774 row_pointers = (png_bytepp)png_malloc(png_ptr,
775 height*sizeof(png_bytep));
777 info_ptr = png_create_info_struct(png_ptr);
779 if (info_ptr == NULL)
780 {
781 png_free(png_ptr,row_pointers);
782 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
783 return (1);
784 }
786 if (setjmp(png_jmpbuf(png_ptr)))
787 {
788 /* If we get here, we had a problem writing the file */
789 png_destroy_write_struct(&png_ptr, &info_ptr);
790 return (1);
791 }
793 png_init_io(png_ptr, fp);
794 png_set_IHDR (png_ptr, info_ptr,width, height,
795 8, PNG_COLOR_TYPE_RGB_ALPHA,
796 PNG_INTERLACE_NONE,
797 PNG_COMPRESSION_TYPE_DEFAULT,
798 PNG_FILTER_TYPE_DEFAULT);
800 text[0].key = "Software";
801 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
802 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
803 png_set_text (png_ptr, info_ptr, text, 1);
805 /* lets make this fast while ending up with some increass in image size */
806 png_set_filter(png_ptr,0,PNG_FILTER_NONE);
807 /* png_set_filter(png_ptr,0,PNG_FILTER_SUB); */
808 png_set_compression_level(png_ptr,1);
809 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
810 /*
811 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
812 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
813 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
815 /* Write header data */
816 png_write_info (png_ptr, info_ptr);
817 for (i = 0; i < height; i++)
818 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
820 png_write_image(png_ptr, row_pointers);
821 png_write_end(png_ptr, info_ptr);
822 png_free(png_ptr,row_pointers);
823 png_destroy_write_struct(&png_ptr, &info_ptr);
824 return 1;
825 }
828 /* ----- COMMON ROUTINES for pdf, svg and eps */
829 #define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
830 #define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
832 #define PDF_CALC_DEBUG 0
834 typedef struct pdf_point
835 {
836 double x, y;
837 } pdf_point;
839 typedef struct
840 {
841 double ascender, descender, baselineY;
842 pdf_point sizep, minp, maxp;
843 double x, y, tdx, tdy;
844 double r, cos_r, sin_r;
845 double ma, mb, mc, md, mx, my; /* pdf coord matrix */
846 double tmx, tmy; /* last 2 coords of text coord matrix */
847 #if PDF_CALC_DEBUG
848 int debug;
849 #endif
850 } pdf_coords;
852 #if PDF_CALC_DEBUG
853 static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
854 {
855 fprintf(stderr, "PDF CALC =============================\n");
856 fprintf(stderr, " '%s' at %f pt\n", node->text, node->size);
857 fprintf(stderr, " align h = %s, v = %s, sizep = %f, %f\n",
858 (node->halign == GFX_H_RIGHT ? "r" :
859 (node->halign == GFX_H_CENTER ? "c" :
860 (node->halign == GFX_H_LEFT ? "l" : "N"))),
861 (node->valign == GFX_V_TOP ? "t" :
862 (node->valign == GFX_V_CENTER ? "c" :
863 (node->valign == GFX_V_BOTTOM ? "b" : "N"))),
864 g->sizep.x, g->sizep.y);
865 fprintf(stderr, " r = %f = %f, cos = %f, sin = %f\n",
866 g->r, node->angle, g->cos_r, g->sin_r);
867 fprintf(stderr, " ascender = %f, descender = %f, baselineY = %f\n",
868 g->ascender, g->descender, g->baselineY);
869 fprintf(stderr, " sizep: %f, %f\n", g->sizep.x, g->sizep.y);
870 fprintf(stderr, " minp: %f, %f maxp = %f, %f\n",
871 g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
872 fprintf(stderr, " x = %f, y = %f\n", g->x, g->y);
873 fprintf(stderr, " tdx = %f, tdy = %f\n", g->tdx, g->tdy);
874 fprintf(stderr, " GM = %f, %f, %f, %f, %f, %f\n",
875 g->ma, g->mb, g->mc, g->md, g->mx, g->my);
876 fprintf(stderr, " TM = %f, %f, %f, %f, %f, %f\n",
877 g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
878 }
879 #endif
881 #if PDF_CALC_DEBUG
882 #define PDF_DD(x) if (g->debug) x;
883 #else
884 #define PDF_DD(x)
885 #endif
887 static void pdf_rotate(pdf_coords *g, pdf_point *p)
888 {
889 double x2 = g->cos_r * p->x - g->sin_r * p->y;
890 double y2 = g->sin_r * p->x + g->cos_r * p->y;
891 PDF_DD( fprintf(stderr, " rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
892 p->x = x2;
893 p->y = y2;
894 }
897 static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
898 {
899 pdf_point a, b, c;
900 #if PDF_CALC_DEBUG
901 /* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
902 g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
903 #endif
904 g->x = node->x;
905 g->y = page_height - node->y;
906 if (node->angle) {
907 g->r = 2 * M_PI * node->angle / 360.0;
908 g->cos_r = cos(g->r);
909 g->sin_r = sin(g->r);
910 } else {
911 g->r = 0;
912 g->cos_r = 1;
913 g->sin_r = 0;
914 }
915 g->ascender = afm_get_ascender(node->filename, node->size);
916 g->descender = afm_get_descender(node->filename, node->size);
917 g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
918 /* seems like libart ignores the descender when doing vertial-align = bottom,
919 so we do that too, to get labels v-aligning properly */
920 g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
921 g->baselineY = -g->ascender - g->sizep.y / 2;
922 a.x = g->sizep.x; a.y = g->sizep.y;
923 b.x = g->sizep.x; b.y = 0;
924 c.x = 0; c.y = g->sizep.y;
925 if (node->angle) {
926 pdf_rotate(g, &a);
927 pdf_rotate(g, &b);
928 pdf_rotate(g, &c);
929 }
930 g->minp.x = min3(a.x, b.x, c.x);
931 g->minp.y = min3(a.y, b.y, c.y);
932 g->maxp.x = max3(a.x, b.x, c.x);
933 g->maxp.y = max3(a.y, b.y, c.y);
934 /* The alignment parameters in node->valign and node->halign
935 specifies the alignment in the non-rotated coordinate system
936 (very unlike pdf/postscript), which complicates matters.
937 */
938 switch (node->halign) {
939 case GFX_H_RIGHT: g->tdx = -g->maxp.x; break;
940 case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
941 case GFX_H_LEFT: g->tdx = -g->minp.x; break;
942 case GFX_H_NULL: g->tdx = 0; break;
943 }
944 switch(node->valign){
945 case GFX_V_TOP: g->tdy = -g->maxp.y; break;
946 case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
947 case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
948 case GFX_V_NULL: g->tdy = 0; break;
949 }
950 g->ma = g->cos_r;
951 g->mb = g->sin_r;
952 g->mc = -g->sin_r;
953 g->md = g->cos_r;
954 g->mx = g->x + g->tdx;
955 g->my = g->y + g->tdy;
956 g->tmx = g->mx - g->ascender * g->mc;
957 g->tmy = g->my - g->ascender * g->md;
958 PDF_DD(pdf_dump_calc(node, g))
959 }
961 /* ------- SVG -------
962 SVG reference:
963 http://www.w3.org/TR/SVG/
964 */
965 static int svg_indent = 0;
966 static int svg_single_line = 0;
967 static const char *svg_default_font = "-dummy-";
968 typedef struct svg_dash
969 {
970 int dash_enable;
971 double dash_adjust, dash_len, dash_offset;
972 double adjusted_on, adjusted_off;
973 } svg_dash;
976 static void svg_print_indent(FILE *fp)
977 {
978 int i;
979 for (i = svg_indent - svg_single_line; i > 0; i--) {
980 putc(' ', fp);
981 putc(' ', fp);
982 }
983 }
985 static void svg_start_tag(FILE *fp, const char *name)
986 {
987 svg_print_indent(fp);
988 putc('<', fp);
989 fputs(name, fp);
990 svg_indent++;
991 }
993 static void svg_close_tag_single_line(FILE *fp)
994 {
995 svg_single_line++;
996 putc('>', fp);
997 }
999 static void svg_close_tag(FILE *fp)
1000 {
1001 putc('>', fp);
1002 if (!svg_single_line)
1003 putc('\n', fp);
1004 }
1006 static void svg_end_tag(FILE *fp, const char *name)
1007 {
1008 /* name is NULL if closing empty-node tag */
1009 svg_indent--;
1010 if (svg_single_line)
1011 svg_single_line--;
1012 else if (name)
1013 svg_print_indent(fp);
1014 if (name != NULL) {
1015 fputs("</", fp);
1016 fputs(name, fp);
1017 } else {
1018 putc('/', fp);
1019 }
1020 svg_close_tag(fp);
1021 }
1023 static void svg_close_tag_empty_node(FILE *fp)
1024 {
1025 svg_end_tag(fp, NULL);
1026 }
1028 static void svg_write_text(FILE *fp, const char *text)
1029 {
1030 const unsigned char *p, *start, *last;
1031 unsigned int ch;
1032 p = (const unsigned char*)text;
1033 if (!p)
1034 return;
1035 /* trim leading spaces */
1036 while (*p == ' ')
1037 p++;
1038 start = p;
1039 /* trim trailing spaces */
1040 last = p - 1;
1041 while ((ch = *p) != 0) {
1042 if (ch != ' ')
1043 last = p;
1044 p++;
1045 }
1046 /* encode trimmed text */
1047 p = start;
1048 while (p <= last) {
1049 ch = *p++;
1050 ch = afm_host2unicode(ch); /* unsafe macro */
1051 switch (ch) {
1052 case '&': fputs("&", fp); break;
1053 case '<': fputs("<", fp); break;
1054 case '>': fputs(">", fp); break;
1055 case '"': fputs(""", fp); break;
1056 default:
1057 if (ch >= 127)
1058 fprintf(fp, "&#%d;", ch);
1059 else
1060 putc(ch, fp);
1061 }
1062 }
1063 }
1065 static void svg_format_number(char *buf, int bufsize, double d)
1066 {
1067 /* omit decimals if integer to reduce filesize */
1068 char *p;
1069 snprintf(buf, bufsize, "%.2f", d);
1070 p = buf; /* doesn't trust snprintf return value */
1071 while (*p)
1072 p++;
1073 while (--p > buf) {
1074 char ch = *p;
1075 if (ch == '0') {
1076 *p = '\0'; /* zap trailing zeros */
1077 continue;
1078 }
1079 if (ch == '.')
1080 *p = '\0'; /* zap trailing dot */
1081 break;
1082 }
1083 }
1085 static void svg_write_number(FILE *fp, double d)
1086 {
1087 char buf[60];
1088 svg_format_number(buf, sizeof(buf), d);
1089 fputs(buf, fp);
1090 }
1092 static int svg_color_is_black(int c)
1093 {
1094 /* gfx_color_t is RRGGBBAA */
1095 return c == 0x000000FF;
1096 }
1098 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
1099 {
1100 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
1101 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
1102 gfx_color_t opacity = c & 0xFF;
1103 fprintf(fp, " %s=\"", attr);
1104 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
1105 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
1106 fprintf(fp, "#%03lX",
1107 ( ((rrggbb >> 8) & 0xF00)
1108 | ((rrggbb >> 4) & 0x0F0)
1109 | ( rrggbb & 0x00F)));
1110 } else {
1111 fprintf(fp, "#%06lX", rrggbb);
1112 }
1113 fputs("\"", fp);
1114 if (opacity != 0xFF) {
1115 fprintf(fp, " opacity=\"");
1116 svg_write_number(fp, opacity / 255.0);
1117 fputs("\"", fp);
1118 }
1119 }
1121 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
1122 {
1123 double offset;
1124 int mult;
1125 if (node->dash_on <= 0 || node->dash_off <= 0) {
1126 d->dash_enable = 0;
1127 return;
1128 }
1129 d->dash_enable = 1;
1130 d->dash_len = node->dash_on + node->dash_off;
1131 /* dash on/off adjustment due to round caps */
1132 d->dash_adjust = 0.8 * node->size;
1133 d->adjusted_on = node->dash_on - d->dash_adjust;
1134 if (d->adjusted_on < 0.01)
1135 d->adjusted_on = 0.01;
1136 d->adjusted_off = d->dash_len - d->adjusted_on;
1137 /* dash offset calc */
1138 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
1139 offset = node->path[0].y;
1140 else
1141 offset = node->path[0].x;
1142 mult = (int)fabs(offset / d->dash_len);
1143 d->dash_offset = offset - mult * d->dash_len;
1144 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
1145 d->dash_offset = d->dash_len - d->dash_offset;
1146 }
1148 static int svg_dash_equal(svg_dash *a, svg_dash *b)
1149 {
1150 if (a->dash_enable != b->dash_enable)
1151 return 0;
1152 if (a->adjusted_on != b->adjusted_on)
1153 return 0;
1154 if (a->adjusted_off != b->adjusted_off)
1155 return 0;
1156 /* rest of properties will be the same when on+off are */
1157 return 1;
1158 }
1160 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
1161 {
1162 svg_dash dash_info;
1163 svg_get_dash(node, &dash_info);
1164 fputs(" stroke-width=\"", fp);
1165 svg_write_number(fp, node->size);
1166 fputs("\"", fp);
1167 svg_write_color(fp, node->color, "stroke");
1168 fputs(" fill=\"none\"", fp);
1169 if (dash_info.dash_enable) {
1170 if (dash_info.dash_offset != 0) {
1171 fputs(" stroke-dashoffset=\"", fp);
1172 svg_write_number(fp, dash_info.dash_offset);
1173 fputs("\"", fp);
1174 }
1175 fputs(" stroke-dasharray=\"", fp);
1176 svg_write_number(fp, dash_info.adjusted_on);
1177 fputs(",", fp);
1178 svg_write_number(fp, dash_info.adjusted_off);
1179 fputs("\"", fp);
1180 }
1181 }
1183 static int svg_is_int_step(double a, double b)
1184 {
1185 double diff = fabs(a - b);
1186 return floor(diff) == diff;
1187 }
1189 static int svg_path_straight_segment(FILE *fp,
1190 double lastA, double currentA, double currentB,
1191 gfx_node_t *node,
1192 int segment_idx, int isx, char absChar, char relChar)
1193 {
1194 if (!svg_is_int_step(lastA, currentA)) {
1195 putc(absChar, fp);
1196 svg_write_number(fp, currentA);
1197 return 0;
1198 }
1199 if (segment_idx < node->points - 1) {
1200 ArtVpath *vec = node->path + segment_idx + 1;
1201 if (vec->code == ART_LINETO) {
1202 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1203 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1204 if (nextB == currentB
1205 && ((currentA >= lastA) == (nextA >= currentA))
1206 && svg_is_int_step(currentA, nextA)) {
1207 return 1; /* skip to next as it is a straight line */
1208 }
1209 }
1210 }
1211 putc(relChar, fp);
1212 svg_write_number(fp, currentA - lastA);
1213 return 0;
1214 }
1216 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1217 {
1218 int i;
1219 double lastX = 0, lastY = 0;
1220 /* for straight lines <path..> tags take less space than
1221 <line..> tags because of the efficient packing
1222 in the 'd' attribute */
1223 svg_start_tag(fp, "path");
1224 if (!multi)
1225 svg_common_path_attributes(fp, node);
1226 fputs(" d=\"", fp);
1227 /* specification of the 'd' attribute: */
1228 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1229 for (i = 0; i < node->points; i++) {
1230 ArtVpath *vec = node->path + i;
1231 double x = vec->x - LINEOFFSET;
1232 double y = vec->y - LINEOFFSET;
1233 switch (vec->code) {
1234 case ART_MOVETO_OPEN: /* fall-through */
1235 case ART_MOVETO:
1236 putc('M', fp);
1237 svg_write_number(fp, x);
1238 putc(',', fp);
1239 svg_write_number(fp, y);
1240 break;
1241 case ART_LINETO:
1242 /* try optimize filesize by using minimal lineto commands */
1243 /* without introducing rounding errors. */
1244 if (x == lastX) {
1245 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1246 continue;
1247 } else if (y == lastY) {
1248 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1249 continue;
1250 } else {
1251 putc('L', fp);
1252 svg_write_number(fp, x);
1253 putc(',', fp);
1254 svg_write_number(fp, y);
1255 }
1256 break;
1257 case ART_CURVETO: break; /* unsupported */
1258 case ART_END: break; /* nop */
1259 }
1260 lastX = x;
1261 lastY = y;
1262 }
1263 if (node->closed_path)
1264 fputs(" Z", fp);
1265 fputs("\"", fp);
1266 svg_close_tag_empty_node(fp);
1267 }
1269 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1270 {
1271 /* optimize for multiple paths with the same color, penwidth, etc. */
1272 int num = 1;
1273 gfx_node_t *node = *nodeR;
1274 gfx_node_t *next = node->next;
1275 while (next) {
1276 if (next->type != node->type
1277 || next->size != node->size
1278 || next->color != node->color
1279 || next->dash_on != node->dash_on
1280 || next->dash_off != node->dash_off)
1281 break;
1282 next = next->next;
1283 num++;
1284 }
1285 if (num == 1) {
1286 svg_path(fp, node, 0);
1287 return;
1288 }
1289 svg_start_tag(fp, "g");
1290 svg_common_path_attributes(fp, node);
1291 svg_close_tag(fp);
1292 while (num && node) {
1293 svg_path(fp, node, 1);
1294 if (!--num)
1295 break;
1296 node = node->next;
1297 *nodeR = node;
1298 }
1299 svg_end_tag(fp, "g");
1300 }
1302 static void svg_area(FILE *fp, gfx_node_t *node)
1303 {
1304 int i;
1305 double startX = 0, startY = 0;
1306 svg_start_tag(fp, "polygon");
1307 fputs(" ", fp);
1308 svg_write_color(fp, node->color, "fill");
1309 fputs(" points=\"", fp);
1310 for (i = 0; i < node->points; i++) {
1311 ArtVpath *vec = node->path + i;
1312 double x = vec->x - LINEOFFSET;
1313 double y = vec->y - LINEOFFSET;
1314 switch (vec->code) {
1315 case ART_MOVETO_OPEN: /* fall-through */
1316 case ART_MOVETO:
1317 svg_write_number(fp, x);
1318 putc(',', fp);
1319 svg_write_number(fp, y);
1320 startX = x;
1321 startY = y;
1322 break;
1323 case ART_LINETO:
1324 if (i == node->points - 2
1325 && node->path[i + 1].code == ART_END
1326 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1327 break; /* poly area always closed, no need for last point */
1328 }
1329 putc(' ', fp);
1330 svg_write_number(fp, x);
1331 putc(',', fp);
1332 svg_write_number(fp, y);
1333 break;
1334 case ART_CURVETO: break; /* unsupported */
1335 case ART_END: break; /* nop */
1336 }
1337 }
1338 fputs("\"", fp);
1339 svg_close_tag_empty_node(fp);
1340 }
1342 static void svg_text(FILE *fp, gfx_node_t *node)
1343 {
1344 pdf_coords g;
1345 const char *fontname;
1346 /* as svg has 0,0 in top-left corner (like most screens) instead of
1347 bottom-left corner like pdf and eps, we have to fake the coords
1348 using offset and inverse sin(r) value */
1349 int page_height = 1000;
1350 pdf_calc(page_height, node, &g);
1351 if (node->angle != 0) {
1352 svg_start_tag(fp, "g");
1353 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1354 skewed text */
1355 fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
1356 g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
1357 svg_close_tag(fp);
1358 }
1359 svg_start_tag(fp, "text");
1360 if (!node->angle) {
1361 fputs(" x=\"", fp);
1362 svg_write_number(fp, g.tmx);
1363 fputs("\" y=\"", fp);
1364 svg_write_number(fp, page_height - g.tmy);
1365 fputs("\"", fp);
1366 }
1367 fontname = afm_get_font_name(node->filename);
1368 if (strcmp(fontname, svg_default_font))
1369 fprintf(fp, " font-family=\"%s\"", fontname);
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 /* Find the first font used, and assume it is the mostly used
1388 one. It reduces the number of font-familty attributes. */
1389 while (node) {
1390 if (node->type == GFX_TEXT && node->filename) {
1391 svg_default_font = afm_get_font_name(node->filename);
1392 break;
1393 }
1394 node = node->next;
1395 }
1396 fputs(
1397 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1398 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1399 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1400 "<!--\n"
1401 " SVG file created by\n"
1402 " RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1403 "\n"
1404 " The width/height attributes in the outhermost svg node\n"
1405 " are just default sizes for the browser which is used\n"
1406 " if the svg file is openened directly without being\n"
1407 " embedded in an html file.\n"
1408 " The viewBox is the local coord system for rrdtool.\n"
1409 "-->\n", fp);
1410 svg_start_tag(fp, "svg");
1411 fputs(" width=\"", fp);
1412 svg_write_number(fp, width * canvas->zoom);
1413 fputs("\" height=\"", fp);
1414 svg_write_number(fp, height * canvas->zoom);
1415 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1416 svg_write_number(fp, -LINEOFFSET);
1417 fputs(" ", fp);
1418 svg_write_number(fp, -LINEOFFSET);
1419 fputs(" ", fp);
1420 svg_write_number(fp, width - LINEOFFSET);
1421 fputs(" ", fp);
1422 svg_write_number(fp, height - LINEOFFSET);
1423 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1424 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1425 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1426 svg_close_tag(fp);
1427 svg_start_tag(fp, "rect");
1428 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1429 svg_write_color(fp, background, "fill");
1430 svg_close_tag_empty_node(fp);
1431 node = canvas->firstnode;
1432 while (node) {
1433 switch (node->type) {
1434 case GFX_LINE:
1435 svg_multi_path(fp, &node);
1436 break;
1437 case GFX_AREA:
1438 svg_area(fp, node);
1439 break;
1440 case GFX_TEXT:
1441 svg_text(fp, node);
1442 }
1443 node = node->next;
1444 }
1445 svg_end_tag(fp, "svg");
1446 return 0;
1447 }
1449 /* ------- EPS -------
1450 EPS and Postscript references:
1451 http://partners.adobe.com/asn/developer/technotes/postscript.html
1452 */
1454 typedef struct eps_font
1455 {
1456 const char *ps_font;
1457 int id;
1458 struct eps_font *next;
1459 } eps_font;
1461 typedef struct eps_state
1462 {
1463 FILE *fp;
1464 gfx_canvas_t *canvas;
1465 art_u32 page_width, page_height;
1466 eps_font *font_list;
1467 /*--*/
1468 gfx_color_t color;
1469 const char *font;
1470 double font_size;
1471 double line_width;
1472 int linecap, linejoin;
1473 int has_dash;
1474 } eps_state;
1476 static void eps_set_color(eps_state *state, gfx_color_t color)
1477 {
1478 #if USE_EPS_FAKE_ALPHA
1479 double a1, a2;
1480 #endif
1481 /* gfx_color_t is RRGGBBAA */
1482 if (state->color == color)
1483 return;
1484 #if USE_EPS_FAKE_ALPHA
1485 a1 = (color & 255) / 255.0;
1486 a2 = 255 * (1 - a1);
1487 #define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
1488 #else
1489 #define eps_color_calc(x) (int)( (x) & 255)
1490 #endif
1491 /* gfx_color_t is RRGGBBAA */
1492 if (state->color == color)
1493 return;
1494 fprintf(state->fp, "%d %d %d Rgb\n",
1495 eps_color_calc(color >> 24),
1496 eps_color_calc(color >> 16),
1497 eps_color_calc(color >> 8));
1498 state->color = color;
1499 }
1501 static int eps_add_font(eps_state *state, gfx_node_t *node)
1502 {
1503 /* The fonts list could be postponed to the end using
1504 (atend), but let's be nice and have them in the header. */
1505 const char *ps_font = afm_get_font_postscript_name(node->filename);
1506 eps_font *ef;
1507 for (ef = state->font_list; ef; ef = ef->next) {
1508 if (!strcmp(ps_font, ef->ps_font))
1509 return 0;
1510 }
1511 ef = malloc(sizeof(eps_font));
1512 if (ef == NULL) {
1513 rrd_set_error("malloc for eps_font");
1514 return -1;
1515 }
1516 ef->next = state->font_list;
1517 ef->ps_font = ps_font;
1518 state->font_list = ef;
1519 return 0;
1520 }
1522 static void eps_list_fonts(eps_state *state, const char *dscName)
1523 {
1524 eps_font *ef;
1525 int lineLen = strlen(dscName);
1526 if (!state->font_list)
1527 return;
1528 fputs(dscName, state->fp);
1529 for (ef = state->font_list; ef; ef = ef->next) {
1530 int nameLen = strlen(ef->ps_font);
1531 if (lineLen + nameLen > 100 && lineLen) {
1532 fputs("\n", state->fp);
1533 fputs("%%- \n", state->fp);
1534 lineLen = 5;
1535 } else {
1536 fputs(" ", state->fp);
1537 lineLen++;
1538 }
1539 fputs(ef->ps_font, state->fp);
1540 lineLen += nameLen;
1541 }
1542 fputs("\n", state->fp);
1543 }
1545 static void eps_define_fonts(eps_state *state)
1546 {
1547 eps_font *ef;
1548 if (!state->font_list)
1549 return;
1550 for (ef = state->font_list; ef; ef = ef->next) {
1551 /* PostScript¨ LANGUAGE REFERENCE third edition
1552 page 349 */
1553 fprintf(state->fp,
1554 "%%\n"
1555 "/%s findfont dup length dict begin\n"
1556 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1557 "/Encoding ISOLatin1Encoding def\n"
1558 "currentdict end\n"
1559 "/%s-ISOLatin1 exch definefont pop\n"
1560 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1561 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1562 }
1563 }
1565 static int eps_prologue(eps_state *state)
1566 {
1567 gfx_node_t *node;
1568 fputs(
1569 "%!PS-Adobe-3.0 EPSF-3.0\n"
1570 "%%Creator: RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1571 /* can't like weird chars here */
1572 "%%Title: (RRDtool output)\n"
1573 "%%DocumentData: Clean7Bit\n"
1574 "", state->fp);
1575 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1576 state->page_width, state->page_height);
1577 for (node = state->canvas->firstnode; node; node = node->next) {
1578 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1579 return -1;
1580 }
1581 eps_list_fonts(state, "%%DocumentFonts:");
1582 eps_list_fonts(state, "%%DocumentNeededFonts:");
1583 fputs(
1584 "%%EndComments\n"
1585 "%%BeginProlog\n"
1586 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1587 "/bd { bind def } bind def\n"
1588 "", state->fp);
1589 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1590 fputs(
1591 "/X2 {X exch X exch} bd\n"
1592 "/M {X2 moveto} bd\n"
1593 "/L {X2 lineto} bd\n"
1594 "/m {moveto} bd\n"
1595 "/l {lineto} bd\n"
1596 "/S {stroke} bd\n"
1597 "/CP {closepath} bd\n"
1598 "/WS {setlinewidth stroke} bd\n"
1599 "/F {fill} bd\n"
1600 "/T1 {gsave} bd\n"
1601 "/T2 {concat 0 0 moveto show grestore} bd\n"
1602 "/T {moveto show} bd\n"
1603 "/Rgb { 255.0 div 3 1 roll\n"
1604 " 255.0 div 3 1 roll \n"
1605 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1606 "", state->fp);
1607 eps_define_fonts(state);
1608 return 0;
1609 }
1611 static void eps_clear_dash(eps_state *state)
1612 {
1613 if (!state->has_dash)
1614 return;
1615 state->has_dash = 0;
1616 fputs("[1 0] 0 setdash\n", state->fp);
1617 }
1619 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1620 {
1621 int i;
1622 FILE *fp = state->fp;
1623 int useOffset = 0;
1624 int clearDashIfAny = 1;
1625 eps_set_color(state, node->color);
1626 if (node->type == GFX_LINE) {
1627 svg_dash dash_info;
1628 if (state->linecap != 1) {
1629 fputs("1 setlinecap\n", fp);
1630 state->linecap = 1;
1631 }
1632 if (state->linejoin != 1) {
1633 fputs("1 setlinejoin\n", fp);
1634 state->linejoin = 1;
1635 }
1636 svg_get_dash(node, &dash_info);
1637 if (dash_info.dash_enable) {
1638 clearDashIfAny = 0;
1639 state->has_dash = 1;
1640 fputs("[", fp);
1641 svg_write_number(fp, dash_info.adjusted_on);
1642 fputs(" ", fp);
1643 svg_write_number(fp, dash_info.adjusted_off);
1644 fputs("] ", fp);
1645 svg_write_number(fp, dash_info.dash_offset);
1646 fputs(" setdash\n", fp);
1647 }
1648 }
1649 if (clearDashIfAny)
1650 eps_clear_dash(state);
1651 for (i = 0; i < node->points; i++) {
1652 ArtVpath *vec = node->path + i;
1653 double x = vec->x;
1654 double y = state->page_height - vec->y;
1655 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1656 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1657 if (useOffset) {
1658 x -= LINEOFFSET;
1659 y -= LINEOFFSET;
1660 }
1661 switch (vec->code) {
1662 case ART_MOVETO_OPEN: /* fall-through */
1663 case ART_MOVETO:
1664 svg_write_number(fp, x);
1665 fputc(' ', fp);
1666 svg_write_number(fp, y);
1667 fputc(' ', fp);
1668 fputs(useOffset ? "M\n" : "m\n", fp);
1669 break;
1670 case ART_LINETO:
1671 svg_write_number(fp, x);
1672 fputc(' ', fp);
1673 svg_write_number(fp, y);
1674 fputc(' ', fp);
1675 fputs(useOffset ? "L\n" : "l\n", fp);
1676 break;
1677 case ART_CURVETO: break; /* unsupported */
1678 case ART_END: break; /* nop */
1679 }
1680 }
1681 if (node->type == GFX_LINE) {
1682 if (node->closed_path)
1683 fputs("CP ", fp);
1684 if (node->size != state->line_width) {
1685 state->line_width = node->size;
1686 svg_write_number(fp, state->line_width);
1687 fputs(" WS\n", fp);
1688 } else {
1689 fputs("S\n", fp);
1690 }
1691 } else {
1692 fputs("F\n", fp);
1693 }
1694 }
1696 static void eps_write_text(eps_state *state, gfx_node_t *node)
1697 {
1698 FILE *fp = state->fp;
1699 const char *p;
1700 const char *ps_font = afm_get_font_postscript_name(node->filename);
1701 int lineLen = 0;
1702 pdf_coords g;
1703 pdf_calc(state->page_height, node, &g);
1704 eps_set_color(state, node->color);
1705 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1706 state->font = ps_font;
1707 state->font_size = node->size;
1708 svg_write_number(fp, state->font_size);
1709 fprintf(fp, " SetFont-%s\n", state->font);
1710 }
1711 if (node->angle)
1712 fputs("T1 ", fp);
1713 fputs("(", fp);
1714 lineLen = 20;
1715 p = node->text;
1716 while (1) {
1717 unsigned char ch = *(unsigned char*)p;
1718 if (!ch)
1719 break;
1720 if (++lineLen > 70) {
1721 fputs("\\\n", fp); /* backslash and \n */
1722 lineLen = 0;
1723 }
1724 switch (ch) {
1725 case '%':
1726 case '(':
1727 case ')':
1728 case '\\':
1729 fputc('\\', fp);
1730 fputc(ch, fp);
1731 break;
1732 case '\n':
1733 fputs("\\n", fp);
1734 break;
1735 case '\r':
1736 fputs("\\r", fp);
1737 break;
1738 case '\t':
1739 fputs("\\t", fp);
1740 break;
1741 default:
1742 if (ch >= 126 || ch < 32) {
1743 fprintf(fp, "\\%03o", ch);
1744 lineLen += 3;
1745 } else {
1746 fputc(ch, fp);
1747 }
1748 }
1749 p++;
1750 }
1751 if (node->angle) {
1752 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1753 skewed text */
1754 fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
1755 g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
1756 } else {
1757 fputs(") ", fp);
1758 svg_write_number(fp, g.tmx);
1759 fputs(" ", fp);
1760 svg_write_number(fp, g.tmy);
1761 fputs(" T\n", fp);
1762 }
1763 }
1765 static int eps_write_content(eps_state *state)
1766 {
1767 gfx_node_t *node;
1768 fputs("%\n", state->fp);
1769 for (node = state->canvas->firstnode; node; node = node->next) {
1770 switch (node->type) {
1771 case GFX_LINE:
1772 case GFX_AREA:
1773 eps_write_linearea(state, node);
1774 break;
1775 case GFX_TEXT:
1776 eps_write_text(state, node);
1777 break;
1778 }
1779 }
1780 return 0;
1781 }
1783 int gfx_render_eps (gfx_canvas_t *canvas,
1784 art_u32 width, art_u32 height,
1785 gfx_color_t background, FILE *fp){
1786 struct eps_state state;
1787 state.fp = fp;
1788 state.canvas = canvas;
1789 state.page_width = width;
1790 state.page_height = height;
1791 state.font = "no-default-font";
1792 state.font_size = -1;
1793 state.color = 0; /* black */
1794 state.font_list = NULL;
1795 state.linecap = -1;
1796 state.linejoin = -1;
1797 state.has_dash = 0;
1798 if (eps_prologue(&state) == -1)
1799 return -1;
1800 eps_set_color(&state, background);
1801 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1802 height, width, height, width);
1803 if (eps_write_content(&state) == -1)
1804 return 0;
1805 fputs("showpage\n", fp);
1806 fputs("%%EOF\n", fp);
1807 while (state.font_list) {
1808 eps_font *next = state.font_list->next;
1809 free(state.font_list);
1810 state.font_list = next;
1811 }
1812 return 0;
1813 }
1815 /* ------- PDF -------
1816 PDF references page:
1817 http://partners.adobe.com/public/developer/pdf/index_reference.html
1818 */
1820 typedef struct pdf_buffer
1821 {
1822 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1823 char *data;
1824 int alloc_size, current_size;
1825 struct pdf_buffer *previous_buffer, *next_buffer;
1826 struct pdf_state *state;
1827 } pdf_buffer;
1829 typedef struct pdf_font
1830 {
1831 const char *ps_font;
1832 pdf_buffer obj;
1833 struct pdf_font *next;
1834 } pdf_font;
1836 typedef struct pdf_state
1837 {
1838 FILE *fp;
1839 gfx_canvas_t *canvas;
1840 art_u32 page_width, page_height;
1841 pdf_font *font_list;
1842 pdf_buffer *first_buffer, *last_buffer;
1843 int pdf_file_pos;
1844 int has_failed;
1845 /*--*/
1846 gfx_color_t stroke_color, fill_color;
1847 int font_id;
1848 double font_size;
1849 double line_width;
1850 svg_dash dash;
1851 int linecap, linejoin;
1852 int last_obj_id;
1853 /*--*/
1854 pdf_buffer pdf_header;
1855 pdf_buffer info_obj, catalog_obj, pages_obj, page1_obj;
1856 pdf_buffer fontsdict_obj;
1857 pdf_buffer graph_stream;
1858 } pdf_state;
1860 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1861 {
1862 int initial_size = 32;
1863 buf->state = state;
1864 buf->id = -42;
1865 buf->alloc_size = 0;
1866 buf->current_size = 0;
1867 buf->data = (char*)malloc(initial_size);
1868 buf->is_obj = 0;
1869 buf->previous_buffer = NULL;
1870 buf->next_buffer = NULL;
1871 if (buf->data == NULL) {
1872 rrd_set_error("malloc for pdf_buffer data");
1873 state->has_failed = 1;
1874 return;
1875 }
1876 buf->alloc_size = initial_size;
1877 if (state->last_buffer)
1878 state->last_buffer->next_buffer = buf;
1879 if (state->first_buffer == NULL)
1880 state->first_buffer = buf;
1881 buf->previous_buffer = state->last_buffer;
1882 state->last_buffer = buf;
1883 }
1885 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1886 {
1887 if (len <= 0)
1888 return;
1889 if (buf->alloc_size < buf->current_size + len) {
1890 int new_size = buf->alloc_size;
1891 char *new_buf;
1892 while (new_size < buf->current_size + len)
1893 new_size *= 4;
1894 new_buf = (char*)malloc(new_size);
1895 if (new_buf == NULL) {
1896 rrd_set_error("re-malloc for pdf_buffer data");
1897 buf->state->has_failed = 1;
1898 return;
1899 }
1900 memcpy(new_buf, buf->data, buf->current_size);
1901 free(buf->data);
1902 buf->data = new_buf;
1903 buf->alloc_size = new_size;
1904 }
1905 memcpy(buf->data + buf->current_size, text, len);
1906 buf->current_size += len;
1907 }
1909 static void pdf_puts(pdf_buffer *buf, const char *text)
1910 {
1911 pdf_put(buf, text, strlen(text));
1912 }
1914 static void pdf_indent(pdf_buffer *buf)
1915 {
1916 pdf_puts(buf, "\t");
1917 }
1919 static void pdf_putsi(pdf_buffer *buf, const char *text)
1920 {
1921 pdf_indent(buf);
1922 pdf_puts(buf, text);
1923 }
1925 static void pdf_putint(pdf_buffer *buf, int i)
1926 {
1927 char tmp[20];
1928 sprintf(tmp, "%d", i);
1929 pdf_puts(buf, tmp);
1930 }
1932 static void pdf_putnumber(pdf_buffer *buf, double d)
1933 {
1934 char tmp[50];
1935 svg_format_number(tmp, sizeof(tmp), d);
1936 pdf_puts(buf, tmp);
1937 }
1939 static void pdf_put_string_contents(pdf_buffer *buf, const char *text)
1940 {
1941 const char *p = text;
1942 while (1) {
1943 unsigned char ch = *(unsigned char*)p;
1944 switch (ch) {
1945 case 0: return;
1946 case '(':
1947 case ')':
1948 case '\\':
1949 pdf_puts(buf, "\\");
1950 pdf_put(buf, p, 1);
1951 break;
1952 case '\n':
1953 pdf_puts(buf, "\\n");
1954 break;
1955 case '\r':
1956 pdf_puts(buf, "\\r");
1957 break;
1958 case '\t':
1959 pdf_puts(buf, "\\t");
1960 break;
1961 default:
1962 if (ch >= 126 || ch < 32) {
1963 char tmp[10];
1964 snprintf(tmp, sizeof(tmp), "\\%03o", ch);
1965 pdf_puts(buf, tmp);
1966 } else {
1967 pdf_put(buf, p, 1);
1968 }
1969 }
1970 p++;
1971 }
1972 }
1974 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
1975 {
1976 pdf_init_buffer(state, buf);
1977 buf->id = ++state->last_obj_id;
1978 buf->is_obj = 1;
1979 buf->is_stream = 0;
1980 }
1982 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
1983 {
1984 pdf_init_object(state, buf);
1985 buf->is_dict = 1;
1986 }
1988 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
1989 gfx_color_t *current_color, const char *op)
1990 {
1991 #if USE_PDF_FAKE_ALPHA
1992 double a1, a2;
1993 #endif
1994 /* gfx_color_t is RRGGBBAA */
1995 if (*current_color == color)
1996 return;
1997 #if USE_PDF_FAKE_ALPHA
1998 a1 = (color & 255) / 255.0;
1999 a2 = 1 - a1;
2000 #define pdf_color_calc(x) ( ((x) & 255) / 255.0 * a1 + a2)
2001 #else
2002 #define pdf_color_calc(x) ( ((x) & 255) / 255.0)
2003 #endif
2004 pdf_putnumber(buf, pdf_color_calc(color >> 24));
2005 pdf_puts(buf, " ");
2006 pdf_putnumber(buf, pdf_color_calc(color >> 16));
2007 pdf_puts(buf, " ");
2008 pdf_putnumber(buf, pdf_color_calc(color >> 8));
2009 pdf_puts(buf, " ");
2010 pdf_puts(buf, op);
2011 pdf_puts(buf, "\n");
2012 *current_color = color;
2013 }
2015 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
2016 {
2017 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
2018 }
2020 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
2021 {
2022 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
2023 }
2025 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
2026 {
2027 const char *ps_font = afm_get_font_postscript_name(node->filename);
2028 pdf_font *ef;
2029 for (ef = state->font_list; ef; ef = ef->next) {
2030 if (!strcmp(ps_font, ef->ps_font))
2031 return ef;
2032 }
2033 return NULL;
2034 }
2036 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
2037 {
2038 pdf_font *ef = pdf_find_font(state, node);
2039 if (ef)
2040 return;
2041 ef = malloc(sizeof(pdf_font));
2042 if (ef == NULL) {
2043 rrd_set_error("malloc for pdf_font");
2044 state->has_failed = 1;
2045 return;
2046 }
2047 pdf_init_dict(state, &ef->obj);
2048 ef->next = state->font_list;
2049 ef->ps_font = afm_get_font_postscript_name(node->filename);
2050 state->font_list = ef;
2051 /* fonts dict */
2052 pdf_putsi(&state->fontsdict_obj, "/F");
2053 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2054 pdf_puts(&state->fontsdict_obj, " ");
2055 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2056 pdf_puts(&state->fontsdict_obj, " 0 R\n");
2057 /* fonts def */
2058 pdf_putsi(&ef->obj, "/Type /Font\n");
2059 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
2060 pdf_putsi(&ef->obj, "/Name /F");
2061 pdf_putint(&ef->obj, ef->obj.id);
2062 pdf_puts(&ef->obj, "\n");
2063 pdf_putsi(&ef->obj, "/BaseFont /");
2064 pdf_puts(&ef->obj, ef->ps_font);
2065 pdf_puts(&ef->obj, "\n");
2066 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
2067 /* 'Cp1252' (this is latin 1 extended with 27 characters;
2068 the encoding is also known as 'winansi')
2069 http://www.lowagie.com/iText/tutorial/ch09.html */
2070 }
2072 static void pdf_create_fonts(pdf_state *state)
2073 {
2074 gfx_node_t *node;
2075 for (node = state->canvas->firstnode; node; node = node->next) {
2076 if (node->type == GFX_TEXT)
2077 pdf_add_font(state, node);
2078 }
2079 }
2081 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
2082 {
2083 int i;
2084 pdf_buffer *s = &state->graph_stream;
2085 if (node->type == GFX_LINE) {
2086 svg_dash dash_info;
2087 svg_get_dash(node, &dash_info);
2088 if (!svg_dash_equal(&dash_info, &state->dash)) {
2089 state->dash = dash_info;
2090 if (dash_info.dash_enable) {
2091 pdf_puts(s, "[");
2092 pdf_putnumber(s, dash_info.adjusted_on);
2093 pdf_puts(s, " ");
2094 pdf_putnumber(s, dash_info.adjusted_off);
2095 pdf_puts(s, "] ");
2096 pdf_putnumber(s, dash_info.dash_offset);
2097 pdf_puts(s, " d\n");
2098 } else {
2099 pdf_puts(s, "[] 0 d\n");
2100 }
2101 }
2102 pdf_set_stroke_color(s, node->color);
2103 if (state->linecap != 1) {
2104 pdf_puts(s, "1 j\n");
2105 state->linecap = 1;
2106 }
2107 if (state->linejoin != 1) {
2108 pdf_puts(s, "1 J\n");
2109 state->linejoin = 1;
2110 }
2111 if (node->size != state->line_width) {
2112 state->line_width = node->size;
2113 pdf_putnumber(s, state->line_width);
2114 pdf_puts(s, " w\n");
2115 }
2116 } else {
2117 pdf_set_fill_color(s, node->color);
2118 }
2119 for (i = 0; i < node->points; i++) {
2120 ArtVpath *vec = node->path + i;
2121 double x = vec->x;
2122 double y = state->page_height - vec->y;
2123 if (node->type == GFX_AREA) {
2124 x += LINEOFFSET; /* adjust for libart handling of areas */
2125 y -= LINEOFFSET;
2126 }
2127 switch (vec->code) {
2128 case ART_MOVETO_OPEN: /* fall-through */
2129 case ART_MOVETO:
2130 pdf_putnumber(s, x);
2131 pdf_puts(s, " ");
2132 pdf_putnumber(s, y);
2133 pdf_puts(s, " m\n");
2134 break;
2135 case ART_LINETO:
2136 pdf_putnumber(s, x);
2137 pdf_puts(s, " ");
2138 pdf_putnumber(s, y);
2139 pdf_puts(s, " l\n");
2140 break;
2141 case ART_CURVETO: break; /* unsupported */
2142 case ART_END: break; /* nop */
2143 }
2144 }
2145 if (node->type == GFX_LINE) {
2146 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
2147 } else {
2148 pdf_puts(s, "f\n");
2149 }
2150 }
2153 static void pdf_write_matrix(pdf_state *state, gfx_node_t *node, pdf_coords *g, int useTM)
2154 {
2155 char tmp[150];
2156 pdf_buffer *s = &state->graph_stream;
2157 if (node->angle == 0) {
2158 pdf_puts(s, "1 0 0 1 ");
2159 pdf_putnumber(s, useTM ? g->tmx : g->mx);
2160 pdf_puts(s, " ");
2161 pdf_putnumber(s, useTM ? g->tmy : g->my);
2162 } else {
2163 /* can't use svg_write_number as 2 decimals is far from enough to avoid
2164 skewed text */
2165 sprintf(tmp, "%f %f %f %f %f %f",
2166 g->ma, g->mb, g->mc, g->md,
2167 useTM ? g->tmx : g->mx,
2168 useTM ? g->tmy : g->my);
2169 pdf_puts(s, tmp);
2170 }
2171 }
2173 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
2174 int last_was_text, int next_is_text)
2175 {
2176 pdf_coords g;
2177 pdf_buffer *s = &state->graph_stream;
2178 pdf_font *font = pdf_find_font(state, node);
2179 if (font == NULL) {
2180 rrd_set_error("font disappeared");
2181 state->has_failed = 1;
2182 return;
2183 }
2184 pdf_calc(state->page_height, node, &g);
2185 #if PDF_CALC_DEBUG
2186 pdf_puts(s, "q % debug green box\n");
2187 pdf_write_matrix(state, node, &g, 0);
2188 pdf_puts(s, " cm\n");
2189 pdf_set_fill_color(s, 0x90FF9000);
2190 pdf_puts(s, "0 0.4 0 rg\n");
2191 pdf_puts(s, "0 0 ");
2192 pdf_putnumber(s, g.sizep.x);
2193 pdf_puts(s, " ");
2194 pdf_putnumber(s, g.sizep.y);
2195 pdf_puts(s, " re\n");
2196 pdf_puts(s, "f\n");
2197 pdf_puts(s, "Q\n");
2198 #endif
2199 pdf_set_fill_color(s, node->color);
2200 if (PDF_CALC_DEBUG || !last_was_text)
2201 pdf_puts(s, "BT\n");
2202 if (state->font_id != font->obj.id || node->size != state->font_size) {
2203 state->font_id = font->obj.id;
2204 state->font_size = node->size;
2205 pdf_puts(s, "/F");
2206 pdf_putint(s, font->obj.id);
2207 pdf_puts(s, " ");
2208 pdf_putnumber(s, node->size);
2209 pdf_puts(s, " Tf\n");
2210 }
2211 pdf_write_matrix(state, node, &g, 1);
2212 pdf_puts(s, " Tm\n");
2213 pdf_puts(s, "(");
2214 pdf_put_string_contents(s, node->text);
2215 pdf_puts(s, ") Tj\n");
2216 if (PDF_CALC_DEBUG || !next_is_text)
2217 pdf_puts(s, "ET\n");
2218 }
2220 static void pdf_write_content(pdf_state *state)
2221 {
2222 gfx_node_t *node;
2223 int last_was_text = 0, next_is_text;
2224 for (node = state->canvas->firstnode; node; node = node->next) {
2225 switch (node->type) {
2226 case GFX_LINE:
2227 case GFX_AREA:
2228 pdf_write_linearea(state, node);
2229 break;
2230 case GFX_TEXT:
2231 next_is_text = node->next && node->next->type == GFX_TEXT;
2232 pdf_write_text(state, node, last_was_text, next_is_text);
2233 break;
2234 }
2235 last_was_text = node->type == GFX_TEXT;
2236 }
2237 }
2239 static void pdf_init_document(pdf_state *state)
2240 {
2241 pdf_init_buffer(state, &state->pdf_header);
2242 pdf_init_dict(state, &state->catalog_obj);
2243 pdf_init_dict(state, &state->info_obj);
2244 pdf_init_dict(state, &state->pages_obj);
2245 pdf_init_dict(state, &state->page1_obj);
2246 pdf_init_dict(state, &state->fontsdict_obj);
2247 pdf_create_fonts(state);
2248 if (state->has_failed)
2249 return;
2250 /* make stream last object in file */
2251 pdf_init_object(state, &state->graph_stream);
2252 state->graph_stream.is_stream = 1;
2253 }
2255 static void pdf_setup_document(pdf_state *state)
2256 {
2257 const char *creator = "RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch";
2258 /* all objects created by now, so init code can reference them */
2259 /* HEADER */
2260 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2261 /* following 8 bit comment is recommended by Adobe for
2262 indicating binary file to file transfer applications */
2263 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2264 /* INFO */
2265 pdf_putsi(&state->info_obj, "/Creator (");
2266 pdf_put_string_contents(&state->info_obj, creator);
2267 pdf_puts(&state->info_obj, ")\n");
2268 /* CATALOG */
2269 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2270 pdf_putsi(&state->catalog_obj, "/Pages ");
2271 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2272 pdf_puts(&state->catalog_obj, " 0 R\n");
2273 /* PAGES */
2274 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2275 pdf_putsi(&state->pages_obj, "/Kids [");
2276 pdf_putint(&state->pages_obj, state->page1_obj.id);
2277 pdf_puts(&state->pages_obj, " 0 R]\n");
2278 pdf_putsi(&state->pages_obj, "/Count 1\n");
2279 /* PAGE 1 */
2280 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2281 pdf_putsi(&state->page1_obj, "/Parent ");
2282 pdf_putint(&state->page1_obj, state->pages_obj.id);
2283 pdf_puts(&state->page1_obj, " 0 R\n");
2284 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2285 pdf_putint(&state->page1_obj, state->page_width);
2286 pdf_puts(&state->page1_obj, " ");
2287 pdf_putint(&state->page1_obj, state->page_height);
2288 pdf_puts(&state->page1_obj, "]\n");
2289 pdf_putsi(&state->page1_obj, "/Contents ");
2290 pdf_putint(&state->page1_obj, state->graph_stream.id);
2291 pdf_puts(&state->page1_obj, " 0 R\n");
2292 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2293 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2294 pdf_puts(&state->page1_obj, " 0 R >>\n");
2295 }
2297 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2298 {
2299 fputs(text, state->fp);
2300 state->pdf_file_pos += strlen(text);
2301 }
2303 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2304 {
2305 char tmp[40];
2306 buf->pdf_file_pos = state->pdf_file_pos;
2307 if (buf->is_obj) {
2308 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2309 pdf_write_string_to_file(state, tmp);
2310 }
2311 if (buf->is_dict)
2312 pdf_write_string_to_file(state, "<<\n");
2313 if (buf->is_stream) {
2314 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2315 pdf_write_string_to_file(state, tmp);
2316 pdf_write_string_to_file(state, "stream\n");
2317 }
2318 fwrite(buf->data, 1, buf->current_size, state->fp);
2319 state->pdf_file_pos += buf->current_size;
2320 if (buf->is_stream)
2321 pdf_write_string_to_file(state, "endstream\n");
2322 if (buf->is_dict)
2323 pdf_write_string_to_file(state, ">>\n");
2324 if (buf->is_obj)
2325 pdf_write_string_to_file(state, "endobj\n");
2326 }
2328 static void pdf_write_to_file(pdf_state *state)
2329 {
2330 pdf_buffer *buf = state->first_buffer;
2331 int xref_pos;
2332 state->pdf_file_pos = 0;
2333 pdf_write_buf_to_file(state, &state->pdf_header);
2334 while (buf) {
2335 if (buf->is_obj)
2336 pdf_write_buf_to_file(state, buf);
2337 buf = buf->next_buffer;
2338 }
2339 xref_pos = state->pdf_file_pos;
2340 fprintf(state->fp, "xref\n");
2341 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2342 /* TOC lines must be exactly 20 bytes including \n */
2343 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2344 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2345 if (buf->is_obj)
2346 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2347 }
2348 fprintf(state->fp, "trailer\n");
2349 fprintf(state->fp, "<<\n");
2350 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2351 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2352 fprintf(state->fp, "\t/Info %d 0 R\n", state->info_obj.id);
2353 fprintf(state->fp, ">>\n");
2354 fprintf(state->fp, "startxref\n");
2355 fprintf(state->fp, "%d\n", xref_pos);
2356 fputs("%%EOF\n", state->fp);
2357 }
2359 static void pdf_free_resources(pdf_state *state)
2360 {
2361 pdf_buffer *buf = state->first_buffer;
2362 while (buf) {
2363 free(buf->data);
2364 buf->data = NULL;
2365 buf->alloc_size = buf->current_size = 0;
2366 buf = buf->next_buffer;
2367 }
2368 while (state->font_list) {
2369 pdf_font *next = state->font_list->next;
2370 free(state->font_list);
2371 state->font_list = next;
2372 }
2373 }
2375 int gfx_render_pdf (gfx_canvas_t *canvas,
2376 art_u32 width, art_u32 height,
2377 gfx_color_t UNUSED(background), FILE *fp){
2378 struct pdf_state state;
2379 memset(&state, 0, sizeof(pdf_state));
2380 state.fp = fp;
2381 state.canvas = canvas;
2382 state.page_width = width;
2383 state.page_height = height;
2384 state.font_id = -1;
2385 state.font_size = -1;
2386 state.font_list = NULL;
2387 state.linecap = -1;
2388 state.linejoin = -1;
2389 pdf_init_document(&state);
2390 /*
2391 pdf_set_color(&state, background);
2392 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2393 height, width, height, width);
2394 */
2395 if (!state.has_failed)
2396 pdf_write_content(&state);
2397 if (!state.has_failed)
2398 pdf_setup_document(&state);
2399 if (!state.has_failed)
2400 pdf_write_to_file(&state);
2401 pdf_free_resources(&state);
2402 return state.has_failed ? -1 : 0;
2403 }