1 /****************************************************************************
2 * RRDtool 1.2.13 Copyright by Tobi Oetiker, 1997-2006
3 ****************************************************************************
4 * rrd_gfx.c graphics wrapper for rrdtool
5 **************************************************************************/
7 /* #define DEBUG */
9 #ifdef DEBUG
10 # define DPRINTF(...) fprintf(stderr, __VA_ARGS__);
11 #else
12 # define DPRINTF(...)
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 int 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 ) {
307 FT_Done_FreeType(library);
308 return -1;
309 }
310 error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
311 if ( error ) {
312 FT_Done_FreeType(library);
313 return -1;
314 }
315 string = gfx_string_create( canvas, face, text, rotation, tabwidth, size );
316 text_width = string->width;
317 gfx_string_destroy(string);
318 FT_Done_FreeType(library);
319 return text_width/64;
320 }
322 static void gfx_libart_close_path(gfx_node_t *node, ArtVpath **vec)
323 {
324 /* libart must have end==start for closed paths,
325 even if using ART_MOVETO and not ART_MOVETO_OPEN
326 so add extra point which is the same as the starting point */
327 int points_max = node->points; /* scaled array has exact size */
328 int points = node->points - 1;
329 art_vpath_add_point (vec, &points, &points_max, ART_LINETO,
330 (**vec).x, (**vec).y);
331 art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
332 }
335 /* find bbox of a string */
336 static void compute_string_bbox(gfx_string string) {
337 unsigned int n;
338 FT_BBox bbox;
340 bbox.xMin = bbox.yMin = 32000;
341 bbox.xMax = bbox.yMax = -32000;
342 for ( n = 0; n < string->num_glyphs; n++ ) {
343 FT_BBox glyph_bbox;
344 FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
345 &glyph_bbox );
346 if (glyph_bbox.xMin < bbox.xMin) {
347 bbox.xMin = glyph_bbox.xMin;
348 }
349 if (glyph_bbox.yMin < bbox.yMin) {
350 bbox.yMin = glyph_bbox.yMin;
351 }
352 if (glyph_bbox.xMax > bbox.xMax) {
353 bbox.xMax = glyph_bbox.xMax;
354 }
355 if (glyph_bbox.yMax > bbox.yMax) {
356 bbox.yMax = glyph_bbox.yMax;
357 }
358 }
359 if ( bbox.xMin > bbox.xMax ) {
360 bbox.xMin = 0;
361 bbox.yMin = 0;
362 bbox.xMax = 0;
363 bbox.yMax = 0;
364 }
365 string->bbox.xMin = bbox.xMin;
366 string->bbox.xMax = bbox.xMax;
367 string->bbox.yMin = bbox.yMin;
368 string->bbox.yMax = bbox.yMax;
369 }
371 /* create a free type glyph string */
372 gfx_string gfx_string_create(gfx_canvas_t *canvas, FT_Face face,const char *text,
373 int rotation, double tabwidth, double size )
374 {
376 FT_GlyphSlot slot = face->glyph; /* a small shortcut */
377 FT_Bool use_kerning;
378 FT_UInt previous;
379 FT_Vector ft_pen;
381 gfx_string string = (gfx_string) malloc (sizeof(struct gfx_string_s));
383 gfx_char glyph; /* current glyph in table */
384 int n;
385 int error;
386 int gottab = 0;
388 #ifdef HAVE_MBSTOWCS
389 wchar_t *cstr;
390 size_t clen = strlen(text)+1;
391 cstr = malloc(sizeof(wchar_t) * clen); /* yes we are allocating probably too much here, I know */
392 string->count=mbstowcs(cstr,text,clen);
393 if ( string->count == -1){
394 /* conversion did not work, so lets fall back to just use what we got */
395 string->count=clen-1;
396 for(n=0;text[n] != '\0';n++){
397 cstr[n]=(unsigned char)text[n];
398 }
399 }
400 #else
401 char *cstr = strdup(text);
402 string->count = strlen (text);
403 #endif
405 ft_pen.x = 0; /* start at (0,0) !! */
406 ft_pen.y = 0;
409 string->width = 0;
410 string->height = 0;
411 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
412 string->num_glyphs = 0;
413 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
414 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
415 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
416 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
418 use_kerning = FT_HAS_KERNING(face);
419 previous = 0;
420 glyph = string->glyphs;
421 for (n=0; n<string->count;glyph++,n++) {
422 FT_Vector vec;
423 /* handle the tabs ...
424 have a witespace glyph inserted, but set its width such that the distance
425 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
426 unsigned int letter = cstr[n];
427 letter = afm_fix_osx_charset(letter); /* unsafe macro */
429 gottab = 0;
430 if (letter == '\\' && n+1 < string->count && cstr[n+1] == 't'){
431 /* we have a tab here so skip the backslash and
432 set t to ' ' so that we get a white space */
433 gottab = 1;
434 n++;
435 letter = ' ';
436 }
437 if (letter == '\t'){
438 letter = ' ';
439 gottab = 1 ;
440 }
441 /* initialize each struct gfx_char_s */
442 glyph->index = 0;
443 glyph->pos.x = 0;
444 glyph->pos.y = 0;
445 glyph->image = NULL;
446 glyph->index = FT_Get_Char_Index( face, letter );
448 /* compute glyph origin */
449 if ( use_kerning && previous && glyph->index ) {
450 FT_Vector kerning;
451 FT_Get_Kerning (face, previous, glyph->index,
452 ft_kerning_default, &kerning);
453 ft_pen.x += kerning.x;
454 ft_pen.y += kerning.y;
455 }
457 /* load the glyph image (in its native format) */
458 /* for now, we take a monochrome glyph bitmap */
459 error = FT_Load_Glyph (face, glyph->index, size > canvas->font_aa_threshold ?
460 canvas->aa_type == AA_NORMAL ? FT_LOAD_TARGET_NORMAL :
461 canvas->aa_type == AA_LIGHT ? FT_LOAD_TARGET_LIGHT :
462 FT_LOAD_TARGET_MONO : FT_LOAD_TARGET_MONO);
463 if (error) {
464 DPRINTF("couldn't load glyph: %c\n", letter)
465 continue;
466 }
467 error = FT_Get_Glyph (slot, &glyph->image);
468 if (error) {
469 DPRINTF("couldn't get glyph %c from slot %d\n", letter, (int)slot)
470 continue;
471 }
472 /* if we are in tabbing mode, we replace the tab with a space and shift the position
473 of the space so that its left edge is where the tab was supposed to land us */
474 if (gottab){
475 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
476 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
477 }
478 /* store current pen position */
479 glyph->pos.x = ft_pen.x;
480 glyph->pos.y = ft_pen.y;
483 ft_pen.x += slot->advance.x;
484 ft_pen.y += slot->advance.y;
486 /* rotate glyph */
487 vec = glyph->pos;
488 FT_Vector_Transform (&vec, &string->transform);
489 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
490 if (error) {
491 DPRINTF("couldn't transform glyph id %d\n", letter)
492 continue;
493 }
495 /* convert to a bitmap - destroy native image */
496 error = FT_Glyph_To_Bitmap (&glyph->image, size > canvas->font_aa_threshold ?
497 canvas->aa_type == AA_NORMAL ? FT_RENDER_MODE_NORMAL :
498 canvas->aa_type == AA_LIGHT ? FT_RENDER_MODE_LIGHT :
499 FT_RENDER_MODE_MONO : FT_RENDER_MODE_MONO, 0, 1);
500 if (error) {
501 DPRINTF("couldn't convert glyph id %d to bitmap\n", letter)
502 continue;
503 }
505 /* increment number of glyphs */
506 previous = glyph->index;
507 string->num_glyphs++;
508 }
509 free(cstr);
510 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
511 compute_string_bbox( string );
512 /* the last character was a tab */
513 /* if (gottab) { */
514 string->width = ft_pen.x;
515 /* } else {
516 string->width = string->bbox.xMax - string->bbox.xMin;
517 } */
518 string->height = string->bbox.yMax - string->bbox.yMin;
519 return string;
520 }
523 static int gfx_save_png (art_u8 *buffer, FILE *fp,
524 long width, long height, long bytes_per_pixel);
525 /* render grafics into png image */
527 int gfx_render_png (gfx_canvas_t *canvas,
528 art_u32 width, art_u32 height,
529 gfx_color_t background, FILE *fp){
532 FT_Library library;
533 gfx_node_t *node = canvas->firstnode;
534 /*
535 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
536 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
537 */
538 unsigned long pys_width = width * canvas->zoom;
539 unsigned long pys_height = height * canvas->zoom;
540 const int bytes_per_pixel = 4;
541 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
543 /* fill that buffer with out background color */
544 gfx_color_t *buffp = art_new (gfx_color_t, pys_width*pys_height);
545 art_u8 *buffer = (art_u8 *)buffp;
546 unsigned long i;
547 for (i=0;i<pys_width*pys_height;
548 i++){
549 *(buffp++)=background;
550 }
551 FT_Init_FreeType( &library );
552 while(node){
553 switch (node->type) {
554 case GFX_LINE:
555 case GFX_AREA: {
556 ArtVpath *vec;
557 double dst[6];
558 ArtSVP *svp;
559 art_affine_scale(dst,canvas->zoom,canvas->zoom);
560 vec = art_vpath_affine_transform(node->path,dst);
561 if (node->closed_path)
562 gfx_libart_close_path(node, &vec);
563 /* gfx_round_scaled_coordinates(vec); */
564 /* pvec = art_vpath_perturb(vec);
565 art_free(vec); */
566 if(node->type == GFX_LINE){
567 svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
568 ART_PATH_STROKE_CAP_ROUND,
569 node->size*canvas->zoom,4,0.25);
570 } else {
571 svp = art_svp_from_vpath ( vec );
572 /* this takes time and is unnecessary since we make
573 sure elsewhere that the areas are going clock-whise */
574 /* svpt = art_svp_uncross( svp );
575 art_svp_free(svp);
576 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
577 art_svp_free(svpt);
578 */
579 }
580 art_free(vec);
581 /* this is from gnome since libart does not have this yet */
582 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
583 node->color, buffer, rowstride, NULL);
584 art_svp_free(svp);
585 break;
586 }
587 case GFX_TEXT: {
588 unsigned int n;
589 int error;
590 art_u8 fcolor[4],falpha;
591 FT_Face face;
592 gfx_char glyph;
593 gfx_string string;
594 FT_Vector vec; /* 26.6 */
596 float pen_x = 0.0 , pen_y = 0.0;
597 /* double x,y; */
598 long ix,iy;
600 fcolor[0] = node->color >> 24;
601 fcolor[1] = (node->color >> 16) & 0xff;
602 fcolor[2] = (node->color >> 8) & 0xff;
603 falpha = node->color & 0xff;
604 error = FT_New_Face( library,
605 (char *)node->filename,
606 0,
607 &face );
608 if ( error ) {
609 rrd_set_error("failed to load %s",node->filename);
611 break;
612 }
613 error = FT_Set_Char_Size(face, /* handle to face object */
614 (long)(node->size*64),
615 (long)(node->size*64),
616 (long)(100*canvas->zoom),
617 (long)(100*canvas->zoom));
618 if ( error ) break;
619 pen_x = node->x * canvas->zoom;
620 pen_y = node->y * canvas->zoom;
622 string = gfx_string_create (canvas, face, node->text, node->angle, node->tabwidth, node->size);
623 switch(node->halign){
624 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
625 break;
626 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
627 -string->bbox.xMax/2:-string->bbox.xMin/2;
628 break;
629 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
630 break;
631 case GFX_H_NULL: vec.x = 0;
632 break;
633 }
635 switch(node->valign){
636 case GFX_V_TOP: vec.y = string->bbox.yMax;
637 break;
638 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
639 string->bbox.yMax/2:string->bbox.yMin/2;
640 break;
641 case GFX_V_BOTTOM: vec.y = 0;
642 break;
643 case GFX_V_NULL: vec.y = 0;
644 break;
645 }
646 pen_x += vec.x/64;
647 pen_y += vec.y/64;
648 glyph = string->glyphs;
649 for(n=0; n<string->num_glyphs; n++, glyph++) {
650 int gr;
651 FT_Glyph image;
652 FT_BitmapGlyph bit;
653 /* long buf_x,comp_n; */
654 /* make copy to transform */
655 if (! glyph->image) {
656 DPRINTF("no image\n")
657 continue;
658 }
659 error = FT_Glyph_Copy (glyph->image, &image);
660 if (error) {
661 DPRINTF("couldn't copy image\n")
662 continue;
663 }
665 /* transform it */
666 vec = glyph->pos;
667 FT_Vector_Transform (&vec, &string->transform);
669 bit = (FT_BitmapGlyph) image;
670 gr = bit->bitmap.num_grays -1;
671 /*
672 buf_x = (pen_x + 0.5) + (double)bit->left;
673 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
674 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
675 buf_x *= bytes_per_pixel ;
676 for (iy=0; iy < bit->bitmap.rows; iy++){
677 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
678 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
679 buf_y *= rowstride;
680 for (ix=0;ix < bit->bitmap.width;ix++){
681 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
682 }
683 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
684 }
685 art_free(letter);
686 */
687 switch ( bit->bitmap.pixel_mode ) {
688 case FT_PIXEL_MODE_GRAY:
689 for (iy=0; iy < bit->bitmap.rows; iy++){
690 long buf_y = iy+(pen_y+0.5)-bit->top;
691 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
692 buf_y *= rowstride;
693 for (ix=0;ix < bit->bitmap.width;ix++){
694 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
695 art_u8 font_alpha;
697 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
698 buf_x *= bytes_per_pixel ;
699 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix);
700 if (font_alpha > 0){
701 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
702 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
703 }
704 }
705 }
706 break;
708 case FT_PIXEL_MODE_MONO:
709 for (iy=0; iy < bit->bitmap.rows; iy++){
710 long buf_y = iy+(pen_y+0.5)-bit->top;
711 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
712 buf_y *= rowstride;
713 for (ix=0;ix < bit->bitmap.width;ix++){
714 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
716 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
717 buf_x *= bytes_per_pixel ;
718 if ( (fcolor[3] = falpha * ((*(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix/8) >> (7 - (ix % 8))) & 1)) > 0 )
719 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
720 }
721 }
722 break;
724 default:
725 rrd_set_error("unknown freetype pixel mode: %d", bit->bitmap.pixel_mode);
726 break;
727 }
729 /*
730 for (iy=0; iy < bit->bitmap.rows; iy++){
731 long buf_y = iy+(pen_y+0.5)-bit->top;
732 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
733 buf_y *= rowstride;
734 for (ix=0;ix < bit->bitmap.width;ix++){
735 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
736 art_u8 font_alpha;
738 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
739 buf_x *= bytes_per_pixel ;
740 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
741 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
742 for (iz = 0; iz < 3; iz++){
743 art_u8 *orig = buffer + buf_y + buf_x + iz;
744 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
745 (double)fcolor[iz] / gr * (font_alpha));
746 }
747 }
748 }
749 */
750 FT_Done_Glyph (image);
751 }
752 gfx_string_destroy(string);
753 }
754 }
755 node = node->next;
756 }
757 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
758 art_free(buffer);
759 FT_Done_FreeType( library );
760 return 0;
761 }
763 /* free memory used by nodes this will also remove memory required for
764 associated paths and svcs ... but not for text strings */
765 int
766 gfx_destroy (gfx_canvas_t *canvas){
767 gfx_node_t *next,*node = canvas->firstnode;
768 while(node){
769 next = node->next;
770 art_free(node->path);
771 free(node->text);
772 free(node->filename);
773 art_free(node);
774 node = next;
775 }
776 art_free(canvas);
777 return 0;
778 }
780 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
781 png_structp png_ptr = NULL;
782 png_infop info_ptr = NULL;
783 int i;
784 png_bytep *row_pointers;
785 int rowstride = width * bytes_per_pixel;
786 png_text text[2];
788 if (fp == NULL)
789 return (1);
791 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
792 if (png_ptr == NULL)
793 {
794 return (1);
795 }
796 row_pointers = (png_bytepp)png_malloc(png_ptr,
797 height*sizeof(png_bytep));
799 info_ptr = png_create_info_struct(png_ptr);
801 if (info_ptr == NULL)
802 {
803 png_free(png_ptr,row_pointers);
804 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
805 return (1);
806 }
808 if (setjmp(png_jmpbuf(png_ptr)))
809 {
810 /* If we get here, we had a problem writing the file */
811 png_destroy_write_struct(&png_ptr, &info_ptr);
812 return (1);
813 }
815 png_init_io(png_ptr, fp);
816 png_set_IHDR (png_ptr, info_ptr,width, height,
817 8, PNG_COLOR_TYPE_RGB_ALPHA,
818 PNG_INTERLACE_NONE,
819 PNG_COMPRESSION_TYPE_DEFAULT,
820 PNG_FILTER_TYPE_DEFAULT);
822 text[0].key = "Software";
823 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
824 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
825 png_set_text (png_ptr, info_ptr, text, 1);
827 /* lets make this fast while ending up with some increass in image size */
828 png_set_filter(png_ptr,0,PNG_FILTER_NONE);
829 /* png_set_filter(png_ptr,0,PNG_FILTER_SUB); */
830 png_set_compression_level(png_ptr,1);
831 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
832 /*
833 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
834 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
835 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
837 /* Write header data */
838 png_write_info (png_ptr, info_ptr);
839 for (i = 0; i < height; i++)
840 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
842 png_write_image(png_ptr, row_pointers);
843 png_write_end(png_ptr, info_ptr);
844 png_free(png_ptr,row_pointers);
845 png_destroy_write_struct(&png_ptr, &info_ptr);
846 return 1;
847 }
850 /* ----- COMMON ROUTINES for pdf, svg and eps */
851 #define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
852 #define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
854 #define PDF_CALC_DEBUG 0
856 typedef struct pdf_point
857 {
858 double x, y;
859 } pdf_point;
861 typedef struct
862 {
863 double ascender, descender, baselineY;
864 pdf_point sizep, minp, maxp;
865 double x, y, tdx, tdy;
866 double r, cos_r, sin_r;
867 double ma, mb, mc, md, mx, my; /* pdf coord matrix */
868 double tmx, tmy; /* last 2 coords of text coord matrix */
869 #if PDF_CALC_DEBUG
870 int debug;
871 #endif
872 } pdf_coords;
874 #if PDF_CALC_DEBUG
875 static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
876 {
877 fprintf(stderr, "PDF CALC =============================\n");
878 fprintf(stderr, " '%s' at %f pt\n", node->text, node->size);
879 fprintf(stderr, " align h = %s, v = %s, sizep = %f, %f\n",
880 (node->halign == GFX_H_RIGHT ? "r" :
881 (node->halign == GFX_H_CENTER ? "c" :
882 (node->halign == GFX_H_LEFT ? "l" : "N"))),
883 (node->valign == GFX_V_TOP ? "t" :
884 (node->valign == GFX_V_CENTER ? "c" :
885 (node->valign == GFX_V_BOTTOM ? "b" : "N"))),
886 g->sizep.x, g->sizep.y);
887 fprintf(stderr, " r = %f = %f, cos = %f, sin = %f\n",
888 g->r, node->angle, g->cos_r, g->sin_r);
889 fprintf(stderr, " ascender = %f, descender = %f, baselineY = %f\n",
890 g->ascender, g->descender, g->baselineY);
891 fprintf(stderr, " sizep: %f, %f\n", g->sizep.x, g->sizep.y);
892 fprintf(stderr, " minp: %f, %f maxp = %f, %f\n",
893 g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
894 fprintf(stderr, " x = %f, y = %f\n", g->x, g->y);
895 fprintf(stderr, " tdx = %f, tdy = %f\n", g->tdx, g->tdy);
896 fprintf(stderr, " GM = %f, %f, %f, %f, %f, %f\n",
897 g->ma, g->mb, g->mc, g->md, g->mx, g->my);
898 fprintf(stderr, " TM = %f, %f, %f, %f, %f, %f\n",
899 g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
900 }
901 #endif
903 #if PDF_CALC_DEBUG
904 #define PDF_DD(x) if (g->debug) x;
905 #else
906 #define PDF_DD(x)
907 #endif
909 static void pdf_rotate(pdf_coords *g, pdf_point *p)
910 {
911 double x2 = g->cos_r * p->x - g->sin_r * p->y;
912 double y2 = g->sin_r * p->x + g->cos_r * p->y;
913 PDF_DD( fprintf(stderr, " rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
914 p->x = x2;
915 p->y = y2;
916 }
919 static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
920 {
921 pdf_point a, b, c;
922 #if PDF_CALC_DEBUG
923 /* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
924 g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
925 #endif
926 g->x = node->x;
927 g->y = page_height - node->y;
928 if (node->angle) {
929 g->r = 2 * M_PI * node->angle / 360.0;
930 g->cos_r = cos(g->r);
931 g->sin_r = sin(g->r);
932 } else {
933 g->r = 0;
934 g->cos_r = 1;
935 g->sin_r = 0;
936 }
937 g->ascender = afm_get_ascender(node->filename, node->size);
938 g->descender = afm_get_descender(node->filename, node->size);
939 g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
940 /* seems like libart ignores the descender when doing vertial-align = bottom,
941 so we do that too, to get labels v-aligning properly */
942 g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
943 g->baselineY = -g->ascender - g->sizep.y / 2;
944 a.x = g->sizep.x; a.y = g->sizep.y;
945 b.x = g->sizep.x; b.y = 0;
946 c.x = 0; c.y = g->sizep.y;
947 if (node->angle) {
948 pdf_rotate(g, &a);
949 pdf_rotate(g, &b);
950 pdf_rotate(g, &c);
951 }
952 g->minp.x = min3(a.x, b.x, c.x);
953 g->minp.y = min3(a.y, b.y, c.y);
954 g->maxp.x = max3(a.x, b.x, c.x);
955 g->maxp.y = max3(a.y, b.y, c.y);
956 /* The alignment parameters in node->valign and node->halign
957 specifies the alignment in the non-rotated coordinate system
958 (very unlike pdf/postscript), which complicates matters.
959 */
960 switch (node->halign) {
961 case GFX_H_RIGHT: g->tdx = -g->maxp.x; break;
962 case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
963 case GFX_H_LEFT: g->tdx = -g->minp.x; break;
964 case GFX_H_NULL: g->tdx = 0; break;
965 }
966 switch(node->valign){
967 case GFX_V_TOP: g->tdy = -g->maxp.y; break;
968 case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
969 case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
970 case GFX_V_NULL: g->tdy = 0; break;
971 }
972 g->ma = g->cos_r;
973 g->mb = g->sin_r;
974 g->mc = -g->sin_r;
975 g->md = g->cos_r;
976 g->mx = g->x + g->tdx;
977 g->my = g->y + g->tdy;
978 g->tmx = g->mx - g->ascender * g->mc;
979 g->tmy = g->my - g->ascender * g->md;
980 PDF_DD(pdf_dump_calc(node, g))
981 }
983 /* ------- SVG -------
984 SVG reference:
985 http://www.w3.org/TR/SVG/
986 */
987 static int svg_indent = 0;
988 static int svg_single_line = 0;
989 static const char *svg_default_font = "-dummy-";
990 typedef struct svg_dash
991 {
992 int dash_enable;
993 double dash_adjust, dash_len, dash_offset;
994 double adjusted_on, adjusted_off;
995 } svg_dash;
998 static void svg_print_indent(FILE *fp)
999 {
1000 int i;
1001 for (i = svg_indent - svg_single_line; i > 0; i--) {
1002 putc(' ', fp);
1003 putc(' ', fp);
1004 }
1005 }
1007 static void svg_start_tag(FILE *fp, const char *name)
1008 {
1009 svg_print_indent(fp);
1010 putc('<', fp);
1011 fputs(name, fp);
1012 svg_indent++;
1013 }
1015 static void svg_close_tag_single_line(FILE *fp)
1016 {
1017 svg_single_line++;
1018 putc('>', fp);
1019 }
1021 static void svg_close_tag(FILE *fp)
1022 {
1023 putc('>', fp);
1024 if (!svg_single_line)
1025 putc('\n', fp);
1026 }
1028 static void svg_end_tag(FILE *fp, const char *name)
1029 {
1030 /* name is NULL if closing empty-node tag */
1031 svg_indent--;
1032 if (svg_single_line)
1033 svg_single_line--;
1034 else if (name)
1035 svg_print_indent(fp);
1036 if (name != NULL) {
1037 fputs("</", fp);
1038 fputs(name, fp);
1039 } else {
1040 putc('/', fp);
1041 }
1042 svg_close_tag(fp);
1043 }
1045 static void svg_close_tag_empty_node(FILE *fp)
1046 {
1047 svg_end_tag(fp, NULL);
1048 }
1050 static void svg_write_text(FILE *fp, const char *text)
1051 {
1052 #ifdef HAVE_MBSTOWCS
1053 size_t clen;
1054 wchar_t *p, *cstr, ch;
1055 int text_count;
1056 if (!text)
1057 return;
1058 clen = strlen(text) + 1;
1059 cstr = malloc(sizeof(wchar_t) * clen);
1060 text_count = mbstowcs(cstr, text, clen);
1061 if (text_count == -1)
1062 text_count = mbstowcs(cstr, "Enc-Err", 6);
1063 p = cstr;
1064 #else
1065 unsigned char *p = text;
1066 unsigned char *cstr;
1067 char ch;
1068 if (!p)
1069 return;
1070 #endif
1071 while (1) {
1072 ch = *p++;
1073 ch = afm_fix_osx_charset(ch); /* unsafe macro */
1074 switch (ch) {
1075 case 0:
1076 #ifdef HAVE_MBSTOWCS
1077 free(cstr);
1078 #endif
1079 return;
1080 case '&': fputs("&", fp); break;
1081 case '<': fputs("<", fp); break;
1082 case '>': fputs(">", fp); break;
1083 case '"': fputs(""", fp); break;
1084 default:
1085 if (ch == 32) {
1086 #ifdef HAVE_MBSTOWCS
1087 if (p <= cstr + 1 || !*p || *p == 32)
1088 fputs(" ", fp); /* non-breaking space in unicode */
1089 else
1090 #endif
1091 fputc(32, fp);
1092 } else if (ch < 32 || ch >= 127)
1093 fprintf(fp, "&#%d;", (int)ch);
1094 else
1095 putc((char)ch, fp);
1096 }
1097 }
1098 }
1100 static void svg_format_number(char *buf, int bufsize, double d)
1101 {
1102 /* omit decimals if integer to reduce filesize */
1103 char *p;
1104 snprintf(buf, bufsize, "%.2f", d);
1105 p = buf; /* doesn't trust snprintf return value */
1106 while (*p)
1107 p++;
1108 while (--p > buf) {
1109 char ch = *p;
1110 if (ch == '0') {
1111 *p = '\0'; /* zap trailing zeros */
1112 continue;
1113 }
1114 if (ch == '.')
1115 *p = '\0'; /* zap trailing dot */
1116 break;
1117 }
1118 }
1120 static void svg_write_number(FILE *fp, double d)
1121 {
1122 char buf[60];
1123 svg_format_number(buf, sizeof(buf), d);
1124 fputs(buf, fp);
1125 }
1127 static int svg_color_is_black(int c)
1128 {
1129 /* gfx_color_t is RRGGBBAA */
1130 return c == 0x000000FF;
1131 }
1133 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
1134 {
1135 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
1136 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
1137 gfx_color_t opacity = c & 0xFF;
1138 fprintf(fp, " %s=\"", attr);
1139 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
1140 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
1141 fprintf(fp, "#%03lX",
1142 ( ((rrggbb >> 8) & 0xF00)
1143 | ((rrggbb >> 4) & 0x0F0)
1144 | ( rrggbb & 0x00F)));
1145 } else {
1146 fprintf(fp, "#%06lX", rrggbb);
1147 }
1148 fputs("\"", fp);
1149 if (opacity != 0xFF) {
1150 fprintf(fp, " opacity=\"");
1151 svg_write_number(fp, opacity / 255.0);
1152 fputs("\"", fp);
1153 }
1154 }
1156 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
1157 {
1158 double offset;
1159 int mult;
1160 if (node->dash_on <= 0 || node->dash_off <= 0) {
1161 d->dash_enable = 0;
1162 return;
1163 }
1164 d->dash_enable = 1;
1165 d->dash_len = node->dash_on + node->dash_off;
1166 /* dash on/off adjustment due to round caps */
1167 d->dash_adjust = 0.8 * node->size;
1168 d->adjusted_on = node->dash_on - d->dash_adjust;
1169 if (d->adjusted_on < 0.01)
1170 d->adjusted_on = 0.01;
1171 d->adjusted_off = d->dash_len - d->adjusted_on;
1172 /* dash offset calc */
1173 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
1174 offset = node->path[0].y;
1175 else
1176 offset = node->path[0].x;
1177 mult = (int)fabs(offset / d->dash_len);
1178 d->dash_offset = offset - mult * d->dash_len;
1179 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
1180 d->dash_offset = d->dash_len - d->dash_offset;
1181 }
1183 static int svg_dash_equal(svg_dash *a, svg_dash *b)
1184 {
1185 if (a->dash_enable != b->dash_enable)
1186 return 0;
1187 if (a->adjusted_on != b->adjusted_on)
1188 return 0;
1189 if (a->adjusted_off != b->adjusted_off)
1190 return 0;
1191 /* rest of properties will be the same when on+off are */
1192 return 1;
1193 }
1195 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
1196 {
1197 svg_dash dash_info;
1198 svg_get_dash(node, &dash_info);
1199 fputs(" stroke-width=\"", fp);
1200 svg_write_number(fp, node->size);
1201 fputs("\"", fp);
1202 svg_write_color(fp, node->color, "stroke");
1203 fputs(" fill=\"none\"", fp);
1204 if (dash_info.dash_enable) {
1205 if (dash_info.dash_offset != 0) {
1206 fputs(" stroke-dashoffset=\"", fp);
1207 svg_write_number(fp, dash_info.dash_offset);
1208 fputs("\"", fp);
1209 }
1210 fputs(" stroke-dasharray=\"", fp);
1211 svg_write_number(fp, dash_info.adjusted_on);
1212 fputs(",", fp);
1213 svg_write_number(fp, dash_info.adjusted_off);
1214 fputs("\"", fp);
1215 }
1216 }
1218 static int svg_is_int_step(double a, double b)
1219 {
1220 double diff = fabs(a - b);
1221 return floor(diff) == diff;
1222 }
1224 static int svg_path_straight_segment(FILE *fp,
1225 double lastA, double currentA, double currentB,
1226 gfx_node_t *node,
1227 int segment_idx, int isx, char absChar, char relChar)
1228 {
1229 if (!svg_is_int_step(lastA, currentA)) {
1230 putc(absChar, fp);
1231 svg_write_number(fp, currentA);
1232 return 0;
1233 }
1234 if (segment_idx < node->points - 1) {
1235 ArtVpath *vec = node->path + segment_idx + 1;
1236 if (vec->code == ART_LINETO) {
1237 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1238 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1239 if (nextB == currentB
1240 && ((currentA >= lastA) == (nextA >= currentA))
1241 && svg_is_int_step(currentA, nextA)) {
1242 return 1; /* skip to next as it is a straight line */
1243 }
1244 }
1245 }
1246 putc(relChar, fp);
1247 svg_write_number(fp, currentA - lastA);
1248 return 0;
1249 }
1251 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1252 {
1253 int i;
1254 double lastX = 0, lastY = 0;
1255 /* for straight lines <path..> tags take less space than
1256 <line..> tags because of the efficient packing
1257 in the 'd' attribute */
1258 svg_start_tag(fp, "path");
1259 if (!multi)
1260 svg_common_path_attributes(fp, node);
1261 fputs(" d=\"", fp);
1262 /* specification of the 'd' attribute: */
1263 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1264 for (i = 0; i < node->points; i++) {
1265 ArtVpath *vec = node->path + i;
1266 double x = vec->x - LINEOFFSET;
1267 double y = vec->y - LINEOFFSET;
1268 switch (vec->code) {
1269 case ART_MOVETO_OPEN: /* fall-through */
1270 case ART_MOVETO:
1271 putc('M', fp);
1272 svg_write_number(fp, x);
1273 putc(',', fp);
1274 svg_write_number(fp, y);
1275 break;
1276 case ART_LINETO:
1277 /* try optimize filesize by using minimal lineto commands */
1278 /* without introducing rounding errors. */
1279 if (x == lastX) {
1280 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1281 continue;
1282 } else if (y == lastY) {
1283 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1284 continue;
1285 } else {
1286 putc('L', fp);
1287 svg_write_number(fp, x);
1288 putc(',', fp);
1289 svg_write_number(fp, y);
1290 }
1291 break;
1292 case ART_CURVETO: break; /* unsupported */
1293 case ART_END: break; /* nop */
1294 }
1295 lastX = x;
1296 lastY = y;
1297 }
1298 if (node->closed_path)
1299 fputs(" Z", fp);
1300 fputs("\"", fp);
1301 svg_close_tag_empty_node(fp);
1302 }
1304 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1305 {
1306 /* optimize for multiple paths with the same color, penwidth, etc. */
1307 int num = 1;
1308 gfx_node_t *node = *nodeR;
1309 gfx_node_t *next = node->next;
1310 while (next) {
1311 if (next->type != node->type
1312 || next->size != node->size
1313 || next->color != node->color
1314 || next->dash_on != node->dash_on
1315 || next->dash_off != node->dash_off)
1316 break;
1317 next = next->next;
1318 num++;
1319 }
1320 if (num == 1) {
1321 svg_path(fp, node, 0);
1322 return;
1323 }
1324 svg_start_tag(fp, "g");
1325 svg_common_path_attributes(fp, node);
1326 svg_close_tag(fp);
1327 while (num && node) {
1328 svg_path(fp, node, 1);
1329 if (!--num)
1330 break;
1331 node = node->next;
1332 *nodeR = node;
1333 }
1334 svg_end_tag(fp, "g");
1335 }
1337 static void svg_area(FILE *fp, gfx_node_t *node)
1338 {
1339 int i;
1340 double startX = 0, startY = 0;
1341 svg_start_tag(fp, "polygon");
1342 fputs(" ", fp);
1343 svg_write_color(fp, node->color, "fill");
1344 fputs(" points=\"", fp);
1345 for (i = 0; i < node->points; i++) {
1346 ArtVpath *vec = node->path + i;
1347 double x = vec->x - LINEOFFSET;
1348 double y = vec->y - LINEOFFSET;
1349 switch (vec->code) {
1350 case ART_MOVETO_OPEN: /* fall-through */
1351 case ART_MOVETO:
1352 svg_write_number(fp, x);
1353 putc(',', fp);
1354 svg_write_number(fp, y);
1355 startX = x;
1356 startY = y;
1357 break;
1358 case ART_LINETO:
1359 if (i == node->points - 2
1360 && node->path[i + 1].code == ART_END
1361 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1362 break; /* poly area always closed, no need for last point */
1363 }
1364 putc(' ', fp);
1365 svg_write_number(fp, x);
1366 putc(',', fp);
1367 svg_write_number(fp, y);
1368 break;
1369 case ART_CURVETO: break; /* unsupported */
1370 case ART_END: break; /* nop */
1371 }
1372 }
1373 fputs("\"", fp);
1374 svg_close_tag_empty_node(fp);
1375 }
1377 static void svg_text(FILE *fp, gfx_node_t *node)
1378 {
1379 pdf_coords g;
1380 const char *fontname;
1381 /* as svg has 0,0 in top-left corner (like most screens) instead of
1382 bottom-left corner like pdf and eps, we have to fake the coords
1383 using offset and inverse sin(r) value */
1384 int page_height = 1000;
1385 pdf_calc(page_height, node, &g);
1386 if (node->angle != 0) {
1387 svg_start_tag(fp, "g");
1388 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1389 skewed text */
1390 fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
1391 g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
1392 svg_close_tag(fp);
1393 }
1394 svg_start_tag(fp, "text");
1395 if (!node->angle) {
1396 fputs(" x=\"", fp);
1397 svg_write_number(fp, g.tmx);
1398 fputs("\" y=\"", fp);
1399 svg_write_number(fp, page_height - g.tmy);
1400 fputs("\"", fp);
1401 }
1402 fontname = afm_get_font_name(node->filename);
1403 if (strcmp(fontname, svg_default_font))
1404 fprintf(fp, " font-family=\"%s\"", fontname);
1405 fputs(" font-size=\"", fp);
1406 svg_write_number(fp, node->size);
1407 fputs("\"", fp);
1408 if (!svg_color_is_black(node->color))
1409 svg_write_color(fp, node->color, "fill");
1410 svg_close_tag_single_line(fp);
1411 /* support for node->tabwidth missing */
1412 svg_write_text(fp, node->text);
1413 svg_end_tag(fp, "text");
1414 if (node->angle != 0)
1415 svg_end_tag(fp, "g");
1416 }
1418 int gfx_render_svg (gfx_canvas_t *canvas,
1419 art_u32 width, art_u32 height,
1420 gfx_color_t background, FILE *fp){
1421 gfx_node_t *node = canvas->firstnode;
1422 /* Find the first font used, and assume it is the mostly used
1423 one. It reduces the number of font-familty attributes. */
1424 while (node) {
1425 if (node->type == GFX_TEXT && node->filename) {
1426 svg_default_font = afm_get_font_name(node->filename);
1427 break;
1428 }
1429 node = node->next;
1430 }
1431 fputs(
1432 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1433 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1434 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1435 "<!--\n"
1436 " SVG file created by\n"
1437 " RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1438 "\n"
1439 " The width/height attributes in the outhermost svg node\n"
1440 " are just default sizes for the browser which is used\n"
1441 " if the svg file is openened directly without being\n"
1442 " embedded in an html file.\n"
1443 " The viewBox is the local coord system for rrdtool.\n"
1444 "-->\n", fp);
1445 svg_start_tag(fp, "svg");
1446 fputs(" width=\"", fp);
1447 svg_write_number(fp, width * canvas->zoom);
1448 fputs("\" height=\"", fp);
1449 svg_write_number(fp, height * canvas->zoom);
1450 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1451 svg_write_number(fp, -LINEOFFSET);
1452 fputs(" ", fp);
1453 svg_write_number(fp, -LINEOFFSET);
1454 fputs(" ", fp);
1455 svg_write_number(fp, width - LINEOFFSET);
1456 fputs(" ", fp);
1457 svg_write_number(fp, height - LINEOFFSET);
1458 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1459 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1460 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1461 fputs(" xmlns=\"http://www.w3.org/2000/svg\"", fp);
1462 fputs(" xmlns:xlink=\"http://www.w3.org/1999/xlink\"", fp);
1463 svg_close_tag(fp);
1464 svg_start_tag(fp, "rect");
1465 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1466 svg_write_color(fp, background, "fill");
1467 svg_close_tag_empty_node(fp);
1468 node = canvas->firstnode;
1469 while (node) {
1470 switch (node->type) {
1471 case GFX_LINE:
1472 svg_multi_path(fp, &node);
1473 break;
1474 case GFX_AREA:
1475 svg_area(fp, node);
1476 break;
1477 case GFX_TEXT:
1478 svg_text(fp, node);
1479 }
1480 node = node->next;
1481 }
1482 svg_end_tag(fp, "svg");
1483 return 0;
1484 }
1486 /* ------- EPS -------
1487 EPS and Postscript references:
1488 http://partners.adobe.com/asn/developer/technotes/postscript.html
1489 */
1491 typedef struct eps_font
1492 {
1493 const char *ps_font;
1494 int id;
1495 struct eps_font *next;
1496 } eps_font;
1498 typedef struct eps_state
1499 {
1500 FILE *fp;
1501 gfx_canvas_t *canvas;
1502 art_u32 page_width, page_height;
1503 eps_font *font_list;
1504 /*--*/
1505 gfx_color_t color;
1506 const char *font;
1507 double font_size;
1508 double line_width;
1509 int linecap, linejoin;
1510 int has_dash;
1511 } eps_state;
1513 static void eps_set_color(eps_state *state, gfx_color_t color)
1514 {
1515 #if USE_EPS_FAKE_ALPHA
1516 double a1, a2;
1517 #endif
1518 /* gfx_color_t is RRGGBBAA */
1519 if (state->color == color)
1520 return;
1521 #if USE_EPS_FAKE_ALPHA
1522 a1 = (color & 255) / 255.0;
1523 a2 = 255 * (1 - a1);
1524 #define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
1525 #else
1526 #define eps_color_calc(x) (int)( (x) & 255)
1527 #endif
1528 /* gfx_color_t is RRGGBBAA */
1529 if (state->color == color)
1530 return;
1531 fprintf(state->fp, "%d %d %d Rgb\n",
1532 eps_color_calc(color >> 24),
1533 eps_color_calc(color >> 16),
1534 eps_color_calc(color >> 8));
1535 state->color = color;
1536 }
1538 static int eps_add_font(eps_state *state, gfx_node_t *node)
1539 {
1540 /* The fonts list could be postponed to the end using
1541 (atend), but let's be nice and have them in the header. */
1542 const char *ps_font = afm_get_font_postscript_name(node->filename);
1543 eps_font *ef;
1544 for (ef = state->font_list; ef; ef = ef->next) {
1545 if (!strcmp(ps_font, ef->ps_font))
1546 return 0;
1547 }
1548 ef = malloc(sizeof(eps_font));
1549 if (ef == NULL) {
1550 rrd_set_error("malloc for eps_font");
1551 return -1;
1552 }
1553 ef->next = state->font_list;
1554 ef->ps_font = ps_font;
1555 state->font_list = ef;
1556 return 0;
1557 }
1559 static void eps_list_fonts(eps_state *state, const char *dscName)
1560 {
1561 eps_font *ef;
1562 int lineLen = strlen(dscName);
1563 if (!state->font_list)
1564 return;
1565 fputs(dscName, state->fp);
1566 for (ef = state->font_list; ef; ef = ef->next) {
1567 int nameLen = strlen(ef->ps_font);
1568 if (lineLen + nameLen > 100 && lineLen) {
1569 fputs("\n", state->fp);
1570 fputs("%%- \n", state->fp);
1571 lineLen = 5;
1572 } else {
1573 fputs(" ", state->fp);
1574 lineLen++;
1575 }
1576 fputs(ef->ps_font, state->fp);
1577 lineLen += nameLen;
1578 }
1579 fputs("\n", state->fp);
1580 }
1582 static void eps_define_fonts(eps_state *state)
1583 {
1584 eps_font *ef;
1585 if (!state->font_list)
1586 return;
1587 for (ef = state->font_list; ef; ef = ef->next) {
1588 /* PostScript¨ LANGUAGE REFERENCE third edition
1589 page 349 */
1590 fprintf(state->fp,
1591 "%%\n"
1592 "/%s findfont dup length dict begin\n"
1593 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1594 "/Encoding ISOLatin1Encoding def\n"
1595 "currentdict end\n"
1596 "/%s-ISOLatin1 exch definefont pop\n"
1597 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1598 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1599 }
1600 }
1602 static int eps_prologue(eps_state *state)
1603 {
1604 gfx_node_t *node;
1605 fputs(
1606 "%!PS-Adobe-3.0 EPSF-3.0\n"
1607 "%%Creator: RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1608 /* can't like weird chars here */
1609 "%%Title: (RRDtool output)\n"
1610 "%%DocumentData: Clean7Bit\n"
1611 "", state->fp);
1612 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1613 state->page_width, state->page_height);
1614 for (node = state->canvas->firstnode; node; node = node->next) {
1615 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1616 return -1;
1617 }
1618 eps_list_fonts(state, "%%DocumentFonts:");
1619 eps_list_fonts(state, "%%DocumentNeededFonts:");
1620 fputs(
1621 "%%EndComments\n"
1622 "%%BeginProlog\n"
1623 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1624 "/bd { bind def } bind def\n"
1625 "", state->fp);
1626 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1627 fputs(
1628 "/X2 {X exch X exch} bd\n"
1629 "/M {X2 moveto} bd\n"
1630 "/L {X2 lineto} bd\n"
1631 "/m {moveto} bd\n"
1632 "/l {lineto} bd\n"
1633 "/S {stroke} bd\n"
1634 "/CP {closepath} bd\n"
1635 "/WS {setlinewidth stroke} bd\n"
1636 "/F {fill} bd\n"
1637 "/T1 {gsave} bd\n"
1638 "/T2 {concat 0 0 moveto show grestore} bd\n"
1639 "/T {moveto show} bd\n"
1640 "/Rgb { 255.0 div 3 1 roll\n"
1641 " 255.0 div 3 1 roll \n"
1642 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1643 "", state->fp);
1644 eps_define_fonts(state);
1645 return 0;
1646 }
1648 static void eps_clear_dash(eps_state *state)
1649 {
1650 if (!state->has_dash)
1651 return;
1652 state->has_dash = 0;
1653 fputs("[1 0] 0 setdash\n", state->fp);
1654 }
1656 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1657 {
1658 int i;
1659 FILE *fp = state->fp;
1660 int useOffset = 0;
1661 int clearDashIfAny = 1;
1662 eps_set_color(state, node->color);
1663 if (node->type == GFX_LINE) {
1664 svg_dash dash_info;
1665 if (state->linecap != 1) {
1666 fputs("1 setlinecap\n", fp);
1667 state->linecap = 1;
1668 }
1669 if (state->linejoin != 1) {
1670 fputs("1 setlinejoin\n", fp);
1671 state->linejoin = 1;
1672 }
1673 svg_get_dash(node, &dash_info);
1674 if (dash_info.dash_enable) {
1675 clearDashIfAny = 0;
1676 state->has_dash = 1;
1677 fputs("[", fp);
1678 svg_write_number(fp, dash_info.adjusted_on);
1679 fputs(" ", fp);
1680 svg_write_number(fp, dash_info.adjusted_off);
1681 fputs("] ", fp);
1682 svg_write_number(fp, dash_info.dash_offset);
1683 fputs(" setdash\n", fp);
1684 }
1685 }
1686 if (clearDashIfAny)
1687 eps_clear_dash(state);
1688 for (i = 0; i < node->points; i++) {
1689 ArtVpath *vec = node->path + i;
1690 double x = vec->x;
1691 double y = state->page_height - vec->y;
1692 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1693 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1694 if (useOffset) {
1695 x -= LINEOFFSET;
1696 y -= LINEOFFSET;
1697 }
1698 switch (vec->code) {
1699 case ART_MOVETO_OPEN: /* fall-through */
1700 case ART_MOVETO:
1701 svg_write_number(fp, x);
1702 fputc(' ', fp);
1703 svg_write_number(fp, y);
1704 fputc(' ', fp);
1705 fputs(useOffset ? "M\n" : "m\n", fp);
1706 break;
1707 case ART_LINETO:
1708 svg_write_number(fp, x);
1709 fputc(' ', fp);
1710 svg_write_number(fp, y);
1711 fputc(' ', fp);
1712 fputs(useOffset ? "L\n" : "l\n", fp);
1713 break;
1714 case ART_CURVETO: break; /* unsupported */
1715 case ART_END: break; /* nop */
1716 }
1717 }
1718 if (node->type == GFX_LINE) {
1719 if (node->closed_path)
1720 fputs("CP ", fp);
1721 if (node->size != state->line_width) {
1722 state->line_width = node->size;
1723 svg_write_number(fp, state->line_width);
1724 fputs(" WS\n", fp);
1725 } else {
1726 fputs("S\n", fp);
1727 }
1728 } else {
1729 fputs("F\n", fp);
1730 }
1731 }
1733 static void eps_write_text(eps_state *state, gfx_node_t *node)
1734 {
1735 FILE *fp = state->fp;
1736 const char *ps_font = afm_get_font_postscript_name(node->filename);
1737 int lineLen = 0;
1738 pdf_coords g;
1739 #ifdef HAVE_MBSTOWCS
1740 size_t clen;
1741 wchar_t *p, *cstr, ch;
1742 int text_count;
1743 if (!node->text)
1744 return;
1745 clen = strlen(node->text) + 1;
1746 cstr = malloc(sizeof(wchar_t) * clen);
1747 text_count = mbstowcs(cstr, node->text, clen);
1748 if (text_count == -1)
1749 text_count = mbstowcs(cstr, "Enc-Err", 6);
1750 p = cstr;
1751 #else
1752 const unsigned char *p = node->text;
1753 unsigned char ch;
1754 if (!p)
1755 return;
1756 #endif
1757 pdf_calc(state->page_height, node, &g);
1758 eps_set_color(state, node->color);
1759 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1760 state->font = ps_font;
1761 state->font_size = node->size;
1762 svg_write_number(fp, state->font_size);
1763 fprintf(fp, " SetFont-%s\n", state->font);
1764 }
1765 if (node->angle)
1766 fputs("T1 ", fp);
1767 fputs("(", fp);
1768 lineLen = 20;
1769 while (1) {
1770 ch = *p;
1771 if (!ch)
1772 break;
1773 ch = afm_fix_osx_charset(ch); /* unsafe macro */
1774 if (++lineLen > 70) {
1775 fputs("\\\n", fp); /* backslash and \n */
1776 lineLen = 0;
1777 }
1778 switch (ch) {
1779 case '%':
1780 case '(':
1781 case ')':
1782 case '\\':
1783 fputc('\\', fp);
1784 fputc(ch, fp);
1785 break;
1786 case '\n':
1787 fputs("\\n", fp);
1788 break;
1789 case '\r':
1790 fputs("\\r", fp);
1791 break;
1792 case '\t':
1793 fputs("\\t", fp);
1794 break;
1795 default:
1796 if (ch > 255) {
1797 fputc('?', fp);
1798 } else if (ch >= 126 || ch < 32) {
1799 fprintf(fp, "\\%03o", (unsigned int)ch);
1800 lineLen += 3;
1801 } else {
1802 fputc(ch, fp);
1803 }
1804 }
1805 p++;
1806 }
1807 #ifdef HAVE_MBSTOWCS
1808 free(cstr);
1809 #endif
1810 if (node->angle) {
1811 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1812 skewed text */
1813 fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
1814 g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
1815 } else {
1816 fputs(") ", fp);
1817 svg_write_number(fp, g.tmx);
1818 fputs(" ", fp);
1819 svg_write_number(fp, g.tmy);
1820 fputs(" T\n", fp);
1821 }
1822 }
1824 static int eps_write_content(eps_state *state)
1825 {
1826 gfx_node_t *node;
1827 fputs("%\n", state->fp);
1828 for (node = state->canvas->firstnode; node; node = node->next) {
1829 switch (node->type) {
1830 case GFX_LINE:
1831 case GFX_AREA:
1832 eps_write_linearea(state, node);
1833 break;
1834 case GFX_TEXT:
1835 eps_write_text(state, node);
1836 break;
1837 }
1838 }
1839 return 0;
1840 }
1842 int gfx_render_eps (gfx_canvas_t *canvas,
1843 art_u32 width, art_u32 height,
1844 gfx_color_t background, FILE *fp){
1845 struct eps_state state;
1846 state.fp = fp;
1847 state.canvas = canvas;
1848 state.page_width = width;
1849 state.page_height = height;
1850 state.font = "no-default-font";
1851 state.font_size = -1;
1852 state.color = 0; /* black */
1853 state.font_list = NULL;
1854 state.linecap = -1;
1855 state.linejoin = -1;
1856 state.has_dash = 0;
1857 state.line_width = 1;
1858 if (eps_prologue(&state) == -1)
1859 return -1;
1860 eps_set_color(&state, background);
1861 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1862 height, width, height, width);
1863 if (eps_write_content(&state) == -1)
1864 return 0;
1865 fputs("showpage\n", fp);
1866 fputs("%%EOF\n", fp);
1867 while (state.font_list) {
1868 eps_font *next = state.font_list->next;
1869 free(state.font_list);
1870 state.font_list = next;
1871 }
1872 return 0;
1873 }
1875 /* ------- PDF -------
1876 PDF references page:
1877 http://partners.adobe.com/public/developer/pdf/index_reference.html
1878 */
1880 typedef struct pdf_buffer
1881 {
1882 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1883 char *data;
1884 int alloc_size, current_size;
1885 struct pdf_buffer *previous_buffer, *next_buffer;
1886 struct pdf_state *state;
1887 } pdf_buffer;
1889 typedef struct pdf_font
1890 {
1891 const char *ps_font;
1892 pdf_buffer obj;
1893 struct pdf_font *next;
1894 } pdf_font;
1896 typedef struct pdf_state
1897 {
1898 FILE *fp;
1899 gfx_canvas_t *canvas;
1900 art_u32 page_width, page_height;
1901 pdf_font *font_list;
1902 pdf_buffer *first_buffer, *last_buffer;
1903 int pdf_file_pos;
1904 int has_failed;
1905 /*--*/
1906 gfx_color_t stroke_color, fill_color;
1907 int font_id;
1908 double font_size;
1909 double line_width;
1910 svg_dash dash;
1911 int linecap, linejoin;
1912 int last_obj_id;
1913 /*--*/
1914 pdf_buffer pdf_header;
1915 pdf_buffer info_obj, catalog_obj, pages_obj, page1_obj;
1916 pdf_buffer fontsdict_obj;
1917 pdf_buffer graph_stream;
1918 } pdf_state;
1920 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1921 {
1922 int initial_size = 32;
1923 buf->state = state;
1924 buf->id = -42;
1925 buf->alloc_size = 0;
1926 buf->current_size = 0;
1927 buf->data = (char*)malloc(initial_size);
1928 buf->is_obj = 0;
1929 buf->previous_buffer = NULL;
1930 buf->next_buffer = NULL;
1931 if (buf->data == NULL) {
1932 rrd_set_error("malloc for pdf_buffer data");
1933 state->has_failed = 1;
1934 return;
1935 }
1936 buf->alloc_size = initial_size;
1937 if (state->last_buffer)
1938 state->last_buffer->next_buffer = buf;
1939 if (state->first_buffer == NULL)
1940 state->first_buffer = buf;
1941 buf->previous_buffer = state->last_buffer;
1942 state->last_buffer = buf;
1943 }
1945 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1946 {
1947 if (len <= 0)
1948 return;
1949 if (buf->alloc_size < buf->current_size + len) {
1950 int new_size = buf->alloc_size;
1951 char *new_buf;
1952 while (new_size < buf->current_size + len)
1953 new_size *= 4;
1954 new_buf = (char*)malloc(new_size);
1955 if (new_buf == NULL) {
1956 rrd_set_error("re-malloc for pdf_buffer data");
1957 buf->state->has_failed = 1;
1958 return;
1959 }
1960 memcpy(new_buf, buf->data, buf->current_size);
1961 free(buf->data);
1962 buf->data = new_buf;
1963 buf->alloc_size = new_size;
1964 }
1965 memcpy(buf->data + buf->current_size, text, len);
1966 buf->current_size += len;
1967 }
1969 static void pdf_put_char(pdf_buffer *buf, char c)
1970 {
1971 if (buf->alloc_size >= buf->current_size + 1) {
1972 buf->data[buf->current_size++] = c;
1973 } else {
1974 char tmp[1];
1975 tmp[0] = (char)c;
1976 pdf_put(buf, tmp, 1);
1977 }
1978 }
1980 static void pdf_puts(pdf_buffer *buf, const char *text)
1981 {
1982 pdf_put(buf, text, strlen(text));
1983 }
1985 static void pdf_indent(pdf_buffer *buf)
1986 {
1987 pdf_puts(buf, "\t");
1988 }
1990 static void pdf_putsi(pdf_buffer *buf, const char *text)
1991 {
1992 pdf_indent(buf);
1993 pdf_puts(buf, text);
1994 }
1996 static void pdf_putint(pdf_buffer *buf, int i)
1997 {
1998 char tmp[20];
1999 sprintf(tmp, "%d", i);
2000 pdf_puts(buf, tmp);
2001 }
2003 static void pdf_putnumber(pdf_buffer *buf, double d)
2004 {
2005 char tmp[50];
2006 svg_format_number(tmp, sizeof(tmp), d);
2007 pdf_puts(buf, tmp);
2008 }
2010 static void pdf_put_string_contents_wide(pdf_buffer *buf, const afm_char *text)
2011 {
2012 const afm_char *p = text;
2013 while (1) {
2014 afm_char ch = *p;
2015 ch = afm_fix_osx_charset(ch); /* unsafe macro */
2016 switch (ch) {
2017 case 0:
2018 return;
2019 case '(':
2020 pdf_puts(buf, "\\(");
2021 break;
2022 case ')':
2023 pdf_puts(buf, "\\)");
2024 break;
2025 case '\\':
2026 pdf_puts(buf, "\\\\");
2027 break;
2028 case '\n':
2029 pdf_puts(buf, "\\n");
2030 break;
2031 case '\r':
2032 pdf_puts(buf, "\\r");
2033 break;
2034 case '\t':
2035 pdf_puts(buf, "\\t");
2036 break;
2037 default:
2038 if (ch > 255) {
2039 pdf_put_char(buf, '?');
2040 } else if (ch > 125 || ch < 32) {
2041 pdf_put_char(buf, ch);
2042 } else {
2043 char tmp[10];
2044 snprintf(tmp, sizeof(tmp), "\\%03o", (int)ch);
2045 pdf_puts(buf, tmp);
2046 }
2047 }
2048 p++;
2049 }
2050 }
2052 static void pdf_put_string_contents(pdf_buffer *buf, const char *text)
2053 {
2054 #ifdef HAVE_MBSTOWCS
2055 size_t clen = strlen(text) + 1;
2056 wchar_t *cstr = malloc(sizeof(wchar_t) * clen);
2057 int text_count = mbstowcs(cstr, text, clen);
2058 if (text_count == -1)
2059 text_count = mbstowcs(cstr, "Enc-Err", 6);
2060 pdf_put_string_contents_wide(buf, cstr);
2061 #if 0
2062 if (*text == 'W') {
2063 fprintf(stderr, "Decoding utf8 for '%s'\n", text);
2064 wchar_t *p = cstr;
2065 char *pp = text;
2066 fprintf(stderr, "sz wc = %d\n", sizeof(wchar_t));
2067 while (*p) {
2068 fprintf(stderr, " %d = %c versus %d = %c\n", *p, (char)*p, 255 & (int)*pp, *pp);
2069 p++;
2070 pp++;
2071 }
2072 }
2073 #endif
2074 free(cstr);
2075 #else
2076 pdf_put_string_contents_wide(buf, text);
2077 #endif
2078 }
2080 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
2081 {
2082 pdf_init_buffer(state, buf);
2083 buf->id = ++state->last_obj_id;
2084 buf->is_obj = 1;
2085 buf->is_stream = 0;
2086 }
2088 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
2089 {
2090 pdf_init_object(state, buf);
2091 buf->is_dict = 1;
2092 }
2094 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
2095 gfx_color_t *current_color, const char *op)
2096 {
2097 #if USE_PDF_FAKE_ALPHA
2098 double a1, a2;
2099 #endif
2100 /* gfx_color_t is RRGGBBAA */
2101 if (*current_color == color)
2102 return;
2103 #if USE_PDF_FAKE_ALPHA
2104 a1 = (color & 255) / 255.0;
2105 a2 = 1 - a1;
2106 #define pdf_color_calc(x) ( ((x) & 255) / 255.0 * a1 + a2)
2107 #else
2108 #define pdf_color_calc(x) ( ((x) & 255) / 255.0)
2109 #endif
2110 pdf_putnumber(buf, pdf_color_calc(color >> 24));
2111 pdf_puts(buf, " ");
2112 pdf_putnumber(buf, pdf_color_calc(color >> 16));
2113 pdf_puts(buf, " ");
2114 pdf_putnumber(buf, pdf_color_calc(color >> 8));
2115 pdf_puts(buf, " ");
2116 pdf_puts(buf, op);
2117 pdf_puts(buf, "\n");
2118 *current_color = color;
2119 }
2121 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
2122 {
2123 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
2124 }
2126 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
2127 {
2128 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
2129 }
2131 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
2132 {
2133 const char *ps_font = afm_get_font_postscript_name(node->filename);
2134 pdf_font *ef;
2135 for (ef = state->font_list; ef; ef = ef->next) {
2136 if (!strcmp(ps_font, ef->ps_font))
2137 return ef;
2138 }
2139 return NULL;
2140 }
2142 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
2143 {
2144 pdf_font *ef = pdf_find_font(state, node);
2145 if (ef)
2146 return;
2147 ef = malloc(sizeof(pdf_font));
2148 if (ef == NULL) {
2149 rrd_set_error("malloc for pdf_font");
2150 state->has_failed = 1;
2151 return;
2152 }
2153 pdf_init_dict(state, &ef->obj);
2154 ef->next = state->font_list;
2155 ef->ps_font = afm_get_font_postscript_name(node->filename);
2156 state->font_list = ef;
2157 /* fonts dict */
2158 pdf_putsi(&state->fontsdict_obj, "/F");
2159 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2160 pdf_puts(&state->fontsdict_obj, " ");
2161 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2162 pdf_puts(&state->fontsdict_obj, " 0 R\n");
2163 /* fonts def */
2164 pdf_putsi(&ef->obj, "/Type /Font\n");
2165 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
2166 pdf_putsi(&ef->obj, "/Name /F");
2167 pdf_putint(&ef->obj, ef->obj.id);
2168 pdf_puts(&ef->obj, "\n");
2169 pdf_putsi(&ef->obj, "/BaseFont /");
2170 pdf_puts(&ef->obj, ef->ps_font);
2171 pdf_puts(&ef->obj, "\n");
2172 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
2173 /* 'Cp1252' (this is latin 1 extended with 27 characters;
2174 the encoding is also known as 'winansi')
2175 http://www.lowagie.com/iText/tutorial/ch09.html */
2176 }
2178 static void pdf_create_fonts(pdf_state *state)
2179 {
2180 gfx_node_t *node;
2181 for (node = state->canvas->firstnode; node; node = node->next) {
2182 if (node->type == GFX_TEXT)
2183 pdf_add_font(state, node);
2184 }
2185 }
2187 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
2188 {
2189 int i;
2190 pdf_buffer *s = &state->graph_stream;
2191 if (node->type == GFX_LINE) {
2192 svg_dash dash_info;
2193 svg_get_dash(node, &dash_info);
2194 if (!svg_dash_equal(&dash_info, &state->dash)) {
2195 state->dash = dash_info;
2196 if (dash_info.dash_enable) {
2197 pdf_puts(s, "[");
2198 pdf_putnumber(s, dash_info.adjusted_on);
2199 pdf_puts(s, " ");
2200 pdf_putnumber(s, dash_info.adjusted_off);
2201 pdf_puts(s, "] ");
2202 pdf_putnumber(s, dash_info.dash_offset);
2203 pdf_puts(s, " d\n");
2204 } else {
2205 pdf_puts(s, "[] 0 d\n");
2206 }
2207 }
2208 pdf_set_stroke_color(s, node->color);
2209 if (state->linecap != 1) {
2210 pdf_puts(s, "1 j\n");
2211 state->linecap = 1;
2212 }
2213 if (state->linejoin != 1) {
2214 pdf_puts(s, "1 J\n");
2215 state->linejoin = 1;
2216 }
2217 if (node->size != state->line_width) {
2218 state->line_width = node->size;
2219 pdf_putnumber(s, state->line_width);
2220 pdf_puts(s, " w\n");
2221 }
2222 } else {
2223 pdf_set_fill_color(s, node->color);
2224 }
2225 for (i = 0; i < node->points; i++) {
2226 ArtVpath *vec = node->path + i;
2227 double x = vec->x;
2228 double y = state->page_height - vec->y;
2229 if (node->type == GFX_AREA) {
2230 x += LINEOFFSET; /* adjust for libart handling of areas */
2231 y -= LINEOFFSET;
2232 }
2233 switch (vec->code) {
2234 case ART_MOVETO_OPEN: /* fall-through */
2235 case ART_MOVETO:
2236 pdf_putnumber(s, x);
2237 pdf_puts(s, " ");
2238 pdf_putnumber(s, y);
2239 pdf_puts(s, " m\n");
2240 break;
2241 case ART_LINETO:
2242 pdf_putnumber(s, x);
2243 pdf_puts(s, " ");
2244 pdf_putnumber(s, y);
2245 pdf_puts(s, " l\n");
2246 break;
2247 case ART_CURVETO: break; /* unsupported */
2248 case ART_END: break; /* nop */
2249 }
2250 }
2251 if (node->type == GFX_LINE) {
2252 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
2253 } else {
2254 pdf_puts(s, "f\n");
2255 }
2256 }
2259 static void pdf_write_matrix(pdf_state *state, gfx_node_t *node, pdf_coords *g, int useTM)
2260 {
2261 char tmp[150];
2262 pdf_buffer *s = &state->graph_stream;
2263 if (node->angle == 0) {
2264 pdf_puts(s, "1 0 0 1 ");
2265 pdf_putnumber(s, useTM ? g->tmx : g->mx);
2266 pdf_puts(s, " ");
2267 pdf_putnumber(s, useTM ? g->tmy : g->my);
2268 } else {
2269 /* can't use svg_write_number as 2 decimals is far from enough to avoid
2270 skewed text */
2271 sprintf(tmp, "%f %f %f %f %f %f",
2272 g->ma, g->mb, g->mc, g->md,
2273 useTM ? g->tmx : g->mx,
2274 useTM ? g->tmy : g->my);
2275 pdf_puts(s, tmp);
2276 }
2277 }
2279 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
2280 int last_was_text, int next_is_text)
2281 {
2282 pdf_coords g;
2283 pdf_buffer *s = &state->graph_stream;
2284 pdf_font *font = pdf_find_font(state, node);
2285 if (font == NULL) {
2286 rrd_set_error("font disappeared");
2287 state->has_failed = 1;
2288 return;
2289 }
2290 pdf_calc(state->page_height, node, &g);
2291 #if PDF_CALC_DEBUG
2292 pdf_puts(s, "q % debug green box\n");
2293 pdf_write_matrix(state, node, &g, 0);
2294 pdf_puts(s, " cm\n");
2295 pdf_set_fill_color(s, 0x90FF9000);
2296 pdf_puts(s, "0 0.4 0 rg\n");
2297 pdf_puts(s, "0 0 ");
2298 pdf_putnumber(s, g.sizep.x);
2299 pdf_puts(s, " ");
2300 pdf_putnumber(s, g.sizep.y);
2301 pdf_puts(s, " re\n");
2302 pdf_puts(s, "f\n");
2303 pdf_puts(s, "Q\n");
2304 #endif
2305 pdf_set_fill_color(s, node->color);
2306 if (PDF_CALC_DEBUG || !last_was_text)
2307 pdf_puts(s, "BT\n");
2308 if (state->font_id != font->obj.id || node->size != state->font_size) {
2309 state->font_id = font->obj.id;
2310 state->font_size = node->size;
2311 pdf_puts(s, "/F");
2312 pdf_putint(s, font->obj.id);
2313 pdf_puts(s, " ");
2314 pdf_putnumber(s, node->size);
2315 pdf_puts(s, " Tf\n");
2316 }
2317 pdf_write_matrix(state, node, &g, 1);
2318 pdf_puts(s, " Tm\n");
2319 pdf_puts(s, "(");
2320 pdf_put_string_contents(s, node->text);
2321 pdf_puts(s, ") Tj\n");
2322 if (PDF_CALC_DEBUG || !next_is_text)
2323 pdf_puts(s, "ET\n");
2324 }
2326 static void pdf_write_content(pdf_state *state)
2327 {
2328 gfx_node_t *node;
2329 int last_was_text = 0, next_is_text;
2330 for (node = state->canvas->firstnode; node; node = node->next) {
2331 switch (node->type) {
2332 case GFX_LINE:
2333 case GFX_AREA:
2334 pdf_write_linearea(state, node);
2335 break;
2336 case GFX_TEXT:
2337 next_is_text = node->next && node->next->type == GFX_TEXT;
2338 pdf_write_text(state, node, last_was_text, next_is_text);
2339 break;
2340 }
2341 last_was_text = node->type == GFX_TEXT;
2342 }
2343 }
2345 static void pdf_init_document(pdf_state *state)
2346 {
2347 pdf_init_buffer(state, &state->pdf_header);
2348 pdf_init_dict(state, &state->catalog_obj);
2349 pdf_init_dict(state, &state->info_obj);
2350 pdf_init_dict(state, &state->pages_obj);
2351 pdf_init_dict(state, &state->page1_obj);
2352 pdf_init_dict(state, &state->fontsdict_obj);
2353 pdf_create_fonts(state);
2354 if (state->has_failed)
2355 return;
2356 /* make stream last object in file */
2357 pdf_init_object(state, &state->graph_stream);
2358 state->graph_stream.is_stream = 1;
2359 }
2361 static void pdf_setup_document(pdf_state *state)
2362 {
2363 const char *creator = "RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch";
2364 /* all objects created by now, so init code can reference them */
2365 /* HEADER */
2366 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2367 /* following 8 bit comment is recommended by Adobe for
2368 indicating binary file to file transfer applications */
2369 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2370 /* INFO */
2371 pdf_putsi(&state->info_obj, "/Creator (");
2372 pdf_put_string_contents(&state->info_obj, creator);
2373 pdf_puts(&state->info_obj, ")\n");
2374 /* CATALOG */
2375 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2376 pdf_putsi(&state->catalog_obj, "/Pages ");
2377 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2378 pdf_puts(&state->catalog_obj, " 0 R\n");
2379 /* PAGES */
2380 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2381 pdf_putsi(&state->pages_obj, "/Kids [");
2382 pdf_putint(&state->pages_obj, state->page1_obj.id);
2383 pdf_puts(&state->pages_obj, " 0 R]\n");
2384 pdf_putsi(&state->pages_obj, "/Count 1\n");
2385 /* PAGE 1 */
2386 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2387 pdf_putsi(&state->page1_obj, "/Parent ");
2388 pdf_putint(&state->page1_obj, state->pages_obj.id);
2389 pdf_puts(&state->page1_obj, " 0 R\n");
2390 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2391 pdf_putint(&state->page1_obj, state->page_width);
2392 pdf_puts(&state->page1_obj, " ");
2393 pdf_putint(&state->page1_obj, state->page_height);
2394 pdf_puts(&state->page1_obj, "]\n");
2395 pdf_putsi(&state->page1_obj, "/Contents ");
2396 pdf_putint(&state->page1_obj, state->graph_stream.id);
2397 pdf_puts(&state->page1_obj, " 0 R\n");
2398 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2399 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2400 pdf_puts(&state->page1_obj, " 0 R >>\n");
2401 }
2403 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2404 {
2405 fputs(text, state->fp);
2406 state->pdf_file_pos += strlen(text);
2407 }
2409 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2410 {
2411 char tmp[40];
2412 buf->pdf_file_pos = state->pdf_file_pos;
2413 if (buf->is_obj) {
2414 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2415 pdf_write_string_to_file(state, tmp);
2416 }
2417 if (buf->is_dict)
2418 pdf_write_string_to_file(state, "<<\n");
2419 if (buf->is_stream) {
2420 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2421 pdf_write_string_to_file(state, tmp);
2422 pdf_write_string_to_file(state, "stream\n");
2423 }
2424 fwrite(buf->data, 1, buf->current_size, state->fp);
2425 state->pdf_file_pos += buf->current_size;
2426 if (buf->is_stream)
2427 pdf_write_string_to_file(state, "endstream\n");
2428 if (buf->is_dict)
2429 pdf_write_string_to_file(state, ">>\n");
2430 if (buf->is_obj)
2431 pdf_write_string_to_file(state, "endobj\n");
2432 }
2434 static void pdf_write_to_file(pdf_state *state)
2435 {
2436 pdf_buffer *buf = state->first_buffer;
2437 int xref_pos;
2438 state->pdf_file_pos = 0;
2439 pdf_write_buf_to_file(state, &state->pdf_header);
2440 while (buf) {
2441 if (buf->is_obj)
2442 pdf_write_buf_to_file(state, buf);
2443 buf = buf->next_buffer;
2444 }
2445 xref_pos = state->pdf_file_pos;
2446 fprintf(state->fp, "xref\n");
2447 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2448 /* TOC lines must be exactly 20 bytes including \n */
2449 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2450 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2451 if (buf->is_obj)
2452 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2453 }
2454 fprintf(state->fp, "trailer\n");
2455 fprintf(state->fp, "<<\n");
2456 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2457 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2458 fprintf(state->fp, "\t/Info %d 0 R\n", state->info_obj.id);
2459 fprintf(state->fp, ">>\n");
2460 fprintf(state->fp, "startxref\n");
2461 fprintf(state->fp, "%d\n", xref_pos);
2462 fputs("%%EOF\n", state->fp);
2463 }
2465 static void pdf_free_resources(pdf_state *state)
2466 {
2467 pdf_buffer *buf = state->first_buffer;
2468 while (buf) {
2469 free(buf->data);
2470 buf->data = NULL;
2471 buf->alloc_size = buf->current_size = 0;
2472 buf = buf->next_buffer;
2473 }
2474 while (state->font_list) {
2475 pdf_font *next = state->font_list->next;
2476 free(state->font_list);
2477 state->font_list = next;
2478 }
2479 }
2481 int gfx_render_pdf (gfx_canvas_t *canvas,
2482 art_u32 width, art_u32 height,
2483 gfx_color_t UNUSED(background), FILE *fp){
2484 struct pdf_state state;
2485 memset(&state, 0, sizeof(pdf_state));
2486 state.fp = fp;
2487 state.canvas = canvas;
2488 state.page_width = width;
2489 state.page_height = height;
2490 state.font_id = -1;
2491 state.font_size = -1;
2492 state.font_list = NULL;
2493 state.linecap = -1;
2494 state.linejoin = -1;
2495 pdf_init_document(&state);
2496 /*
2497 pdf_set_color(&state, background);
2498 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2499 height, width, height, width);
2500 */
2501 if (!state.has_failed)
2502 pdf_write_content(&state);
2503 if (!state.has_failed)
2504 pdf_setup_document(&state);
2505 if (!state.has_failed)
2506 pdf_write_to_file(&state);
2507 pdf_free_resources(&state);
2508 return state.has_failed ? -1 : 0;
2509 }