7084720bc259b7bd1884a0e127aeaa651e5cc033
1 /****************************************************************************
2 * RRDtool 1.2.11 Copyright by Tobi Oetiker, 1997-2005
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 ) 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 = (gfx_string) malloc (sizeof(struct gfx_string_s));
378 gfx_char glyph; /* current glyph in table */
379 int n;
380 int error;
381 int gottab = 0;
383 #ifdef HAVE_MBSTOWCS
384 wchar_t *cstr;
385 size_t clen = strlen(text)+1;
386 cstr = malloc(sizeof(wchar_t) * clen); /* yes we are allocating probably too much here, I know */
387 string->count=mbstowcs(cstr,text,clen);
388 if ( string->count == -1){
389 /* conversion did not work, so lets fall back to just use what we got */
390 string->count=clen-1;
391 for(n=0;text[n] != '\0';n++){
392 cstr[n]=(unsigned char)text[n];
393 }
394 }
395 #else
396 char *cstr = strdup(text);
397 string->count = strlen (text);
398 #endif
400 ft_pen.x = 0; /* start at (0,0) !! */
401 ft_pen.y = 0;
404 string->width = 0;
405 string->height = 0;
406 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
407 string->num_glyphs = 0;
408 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
409 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
410 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
411 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
413 use_kerning = FT_HAS_KERNING(face);
414 previous = 0;
415 glyph = string->glyphs;
416 for (n=0; n<string->count;glyph++,n++) {
417 FT_Vector vec;
418 /* handle the tabs ...
419 have a witespace glyph inserted, but set its width such that the distance
420 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
421 unsigned int letter = cstr[n];
422 letter = afm_fix_osx_charset(letter); /* unsafe macro */
424 gottab = 0;
425 if (letter == '\\' && n+1 < string->count && cstr[n+1] == 't'){
426 /* we have a tab here so skip the backslash and
427 set t to ' ' so that we get a white space */
428 gottab = 1;
429 n++;
430 letter = ' ';
431 }
432 if (letter == '\t'){
433 letter = ' ';
434 gottab = 1 ;
435 }
436 /* initialize each struct gfx_char_s */
437 glyph->index = 0;
438 glyph->pos.x = 0;
439 glyph->pos.y = 0;
440 glyph->image = NULL;
441 glyph->index = FT_Get_Char_Index( face, letter );
443 /* compute glyph origin */
444 if ( use_kerning && previous && glyph->index ) {
445 FT_Vector kerning;
446 FT_Get_Kerning (face, previous, glyph->index,
447 ft_kerning_default, &kerning);
448 ft_pen.x += kerning.x;
449 ft_pen.y += kerning.y;
450 }
452 /* load the glyph image (in its native format) */
453 /* for now, we take a monochrome glyph bitmap */
454 error = FT_Load_Glyph (face, glyph->index, size > canvas->font_aa_threshold ?
455 canvas->aa_type == AA_NORMAL ? FT_LOAD_TARGET_NORMAL :
456 canvas->aa_type == AA_LIGHT ? FT_LOAD_TARGET_LIGHT :
457 FT_LOAD_TARGET_MONO : FT_LOAD_TARGET_MONO);
458 if (error) {
459 DPRINTF("couldn't load glyph: %c\n", letter)
460 continue;
461 }
462 error = FT_Get_Glyph (slot, &glyph->image);
463 if (error) {
464 DPRINTF("couldn't get glyph %c from slot %d\n", letter, (int)slot)
465 continue;
466 }
467 /* if we are in tabbing mode, we replace the tab with a space and shift the position
468 of the space so that its left edge is where the tab was supposed to land us */
469 if (gottab){
470 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
471 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
472 }
473 /* store current pen position */
474 glyph->pos.x = ft_pen.x;
475 glyph->pos.y = ft_pen.y;
478 ft_pen.x += slot->advance.x;
479 ft_pen.y += slot->advance.y;
481 /* rotate glyph */
482 vec = glyph->pos;
483 FT_Vector_Transform (&vec, &string->transform);
484 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
485 if (error) {
486 DPRINTF("couldn't transform glyph id %d\n", letter)
487 continue;
488 }
490 /* convert to a bitmap - destroy native image */
491 error = FT_Glyph_To_Bitmap (&glyph->image, size > canvas->font_aa_threshold ?
492 canvas->aa_type == AA_NORMAL ? FT_RENDER_MODE_NORMAL :
493 canvas->aa_type == AA_LIGHT ? FT_RENDER_MODE_LIGHT :
494 FT_RENDER_MODE_MONO : FT_RENDER_MODE_MONO, 0, 1);
495 if (error) {
496 DPRINTF("couldn't convert glyph id %d to bitmap\n", letter)
497 continue;
498 }
500 /* increment number of glyphs */
501 previous = glyph->index;
502 string->num_glyphs++;
503 }
504 free(cstr);
505 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
506 compute_string_bbox( string );
507 /* the last character was a tab */
508 /* if (gottab) { */
509 string->width = ft_pen.x;
510 /* } else {
511 string->width = string->bbox.xMax - string->bbox.xMin;
512 } */
513 string->height = string->bbox.yMax - string->bbox.yMin;
514 return string;
515 }
518 static int gfx_save_png (art_u8 *buffer, FILE *fp,
519 long width, long height, long bytes_per_pixel);
520 /* render grafics into png image */
522 int gfx_render_png (gfx_canvas_t *canvas,
523 art_u32 width, art_u32 height,
524 gfx_color_t background, FILE *fp){
527 FT_Library library;
528 gfx_node_t *node = canvas->firstnode;
529 /*
530 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
531 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
532 */
533 unsigned long pys_width = width * canvas->zoom;
534 unsigned long pys_height = height * canvas->zoom;
535 const int bytes_per_pixel = 4;
536 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
538 /* fill that buffer with out background color */
539 gfx_color_t *buffp = art_new (gfx_color_t, pys_width*pys_height);
540 art_u8 *buffer = (art_u8 *)buffp;
541 unsigned long i;
542 for (i=0;i<pys_width*pys_height;
543 i++){
544 *(buffp++)=background;
545 }
546 FT_Init_FreeType( &library );
547 while(node){
548 switch (node->type) {
549 case GFX_LINE:
550 case GFX_AREA: {
551 ArtVpath *vec;
552 double dst[6];
553 ArtSVP *svp;
554 art_affine_scale(dst,canvas->zoom,canvas->zoom);
555 vec = art_vpath_affine_transform(node->path,dst);
556 if (node->closed_path)
557 gfx_libart_close_path(node, &vec);
558 /* gfx_round_scaled_coordinates(vec); */
559 /* pvec = art_vpath_perturb(vec);
560 art_free(vec); */
561 if(node->type == GFX_LINE){
562 svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
563 ART_PATH_STROKE_CAP_ROUND,
564 node->size*canvas->zoom,4,0.25);
565 } else {
566 svp = art_svp_from_vpath ( vec );
567 /* this takes time and is unnecessary since we make
568 sure elsewhere that the areas are going clock-whise */
569 /* svpt = art_svp_uncross( svp );
570 art_svp_free(svp);
571 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
572 art_svp_free(svpt);
573 */
574 }
575 art_free(vec);
576 /* this is from gnome since libart does not have this yet */
577 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
578 node->color, buffer, rowstride, NULL);
579 art_svp_free(svp);
580 break;
581 }
582 case GFX_TEXT: {
583 unsigned int n;
584 int error;
585 art_u8 fcolor[4],falpha;
586 FT_Face face;
587 gfx_char glyph;
588 gfx_string string;
589 FT_Vector vec; /* 26.6 */
591 float pen_x = 0.0 , pen_y = 0.0;
592 /* double x,y; */
593 long ix,iy;
595 fcolor[0] = node->color >> 24;
596 fcolor[1] = (node->color >> 16) & 0xff;
597 fcolor[2] = (node->color >> 8) & 0xff;
598 falpha = node->color & 0xff;
599 error = FT_New_Face( library,
600 (char *)node->filename,
601 0,
602 &face );
603 if ( error ) {
604 rrd_set_error("failed to load %s",node->filename);
605 break;
606 }
607 error = FT_Set_Char_Size(face, /* handle to face object */
608 (long)(node->size*64),
609 (long)(node->size*64),
610 (long)(100*canvas->zoom),
611 (long)(100*canvas->zoom));
612 if ( error ) break;
613 pen_x = node->x * canvas->zoom;
614 pen_y = node->y * canvas->zoom;
616 string = gfx_string_create (canvas, face, node->text, node->angle, node->tabwidth, node->size);
617 switch(node->halign){
618 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
619 break;
620 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
621 -string->bbox.xMax/2:-string->bbox.xMin/2;
622 break;
623 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
624 break;
625 case GFX_H_NULL: vec.x = 0;
626 break;
627 }
629 switch(node->valign){
630 case GFX_V_TOP: vec.y = string->bbox.yMax;
631 break;
632 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
633 string->bbox.yMax/2:string->bbox.yMin/2;
634 break;
635 case GFX_V_BOTTOM: vec.y = 0;
636 break;
637 case GFX_V_NULL: vec.y = 0;
638 break;
639 }
640 pen_x += vec.x/64;
641 pen_y += vec.y/64;
642 glyph = string->glyphs;
643 for(n=0; n<string->num_glyphs; n++, glyph++) {
644 int gr;
645 FT_Glyph image;
646 FT_BitmapGlyph bit;
647 /* long buf_x,comp_n; */
648 /* make copy to transform */
649 if (! glyph->image) {
650 DPRINTF("no image\n")
651 continue;
652 }
653 error = FT_Glyph_Copy (glyph->image, &image);
654 if (error) {
655 DPRINTF("couldn't copy image\n")
656 continue;
657 }
659 /* transform it */
660 vec = glyph->pos;
661 FT_Vector_Transform (&vec, &string->transform);
663 bit = (FT_BitmapGlyph) image;
664 gr = bit->bitmap.num_grays -1;
665 /*
666 buf_x = (pen_x + 0.5) + (double)bit->left;
667 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
668 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
669 buf_x *= bytes_per_pixel ;
670 for (iy=0; iy < bit->bitmap.rows; iy++){
671 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
672 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
673 buf_y *= rowstride;
674 for (ix=0;ix < bit->bitmap.width;ix++){
675 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
676 }
677 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
678 }
679 art_free(letter);
680 */
681 switch ( bit->bitmap.pixel_mode ) {
682 case FT_PIXEL_MODE_GRAY:
683 for (iy=0; iy < bit->bitmap.rows; iy++){
684 long buf_y = iy+(pen_y+0.5)-bit->top;
685 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
686 buf_y *= rowstride;
687 for (ix=0;ix < bit->bitmap.width;ix++){
688 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
689 art_u8 font_alpha;
691 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
692 buf_x *= bytes_per_pixel ;
693 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix);
694 if (font_alpha > 0){
695 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
696 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
697 }
698 }
699 }
700 break;
702 case FT_PIXEL_MODE_MONO:
703 for (iy=0; iy < bit->bitmap.rows; iy++){
704 long buf_y = iy+(pen_y+0.5)-bit->top;
705 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
706 buf_y *= rowstride;
707 for (ix=0;ix < bit->bitmap.width;ix++){
708 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
710 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
711 buf_x *= bytes_per_pixel ;
712 if ( (fcolor[3] = falpha * ((*(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix/8) >> (7 - (ix % 8))) & 1)) > 0 )
713 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
714 }
715 }
716 break;
718 default:
719 rrd_set_error("unknown freetype pixel mode: %d", bit->bitmap.pixel_mode);
720 break;
721 }
723 /*
724 for (iy=0; iy < bit->bitmap.rows; iy++){
725 long buf_y = iy+(pen_y+0.5)-bit->top;
726 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
727 buf_y *= rowstride;
728 for (ix=0;ix < bit->bitmap.width;ix++){
729 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
730 art_u8 font_alpha;
732 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
733 buf_x *= bytes_per_pixel ;
734 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
735 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
736 for (iz = 0; iz < 3; iz++){
737 art_u8 *orig = buffer + buf_y + buf_x + iz;
738 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
739 (double)fcolor[iz] / gr * (font_alpha));
740 }
741 }
742 }
743 */
744 FT_Done_Glyph (image);
745 }
746 gfx_string_destroy(string);
747 }
748 }
749 node = node->next;
750 }
751 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
752 art_free(buffer);
753 FT_Done_FreeType( library );
754 return 0;
755 }
757 /* free memory used by nodes this will also remove memory required for
758 associated paths and svcs ... but not for text strings */
759 int
760 gfx_destroy (gfx_canvas_t *canvas){
761 gfx_node_t *next,*node = canvas->firstnode;
762 while(node){
763 next = node->next;
764 art_free(node->path);
765 free(node->text);
766 free(node->filename);
767 art_free(node);
768 node = next;
769 }
770 art_free(canvas);
771 return 0;
772 }
774 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
775 png_structp png_ptr = NULL;
776 png_infop info_ptr = NULL;
777 int i;
778 png_bytep *row_pointers;
779 int rowstride = width * bytes_per_pixel;
780 png_text text[2];
782 if (fp == NULL)
783 return (1);
785 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
786 if (png_ptr == NULL)
787 {
788 return (1);
789 }
790 row_pointers = (png_bytepp)png_malloc(png_ptr,
791 height*sizeof(png_bytep));
793 info_ptr = png_create_info_struct(png_ptr);
795 if (info_ptr == NULL)
796 {
797 png_free(png_ptr,row_pointers);
798 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
799 return (1);
800 }
802 if (setjmp(png_jmpbuf(png_ptr)))
803 {
804 /* If we get here, we had a problem writing the file */
805 png_destroy_write_struct(&png_ptr, &info_ptr);
806 return (1);
807 }
809 png_init_io(png_ptr, fp);
810 png_set_IHDR (png_ptr, info_ptr,width, height,
811 8, PNG_COLOR_TYPE_RGB_ALPHA,
812 PNG_INTERLACE_NONE,
813 PNG_COMPRESSION_TYPE_DEFAULT,
814 PNG_FILTER_TYPE_DEFAULT);
816 text[0].key = "Software";
817 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
818 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
819 png_set_text (png_ptr, info_ptr, text, 1);
821 /* lets make this fast while ending up with some increass in image size */
822 png_set_filter(png_ptr,0,PNG_FILTER_NONE);
823 /* png_set_filter(png_ptr,0,PNG_FILTER_SUB); */
824 png_set_compression_level(png_ptr,1);
825 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
826 /*
827 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
828 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
829 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
831 /* Write header data */
832 png_write_info (png_ptr, info_ptr);
833 for (i = 0; i < height; i++)
834 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
836 png_write_image(png_ptr, row_pointers);
837 png_write_end(png_ptr, info_ptr);
838 png_free(png_ptr,row_pointers);
839 png_destroy_write_struct(&png_ptr, &info_ptr);
840 return 1;
841 }
844 /* ----- COMMON ROUTINES for pdf, svg and eps */
845 #define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
846 #define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
848 #define PDF_CALC_DEBUG 0
850 typedef struct pdf_point
851 {
852 double x, y;
853 } pdf_point;
855 typedef struct
856 {
857 double ascender, descender, baselineY;
858 pdf_point sizep, minp, maxp;
859 double x, y, tdx, tdy;
860 double r, cos_r, sin_r;
861 double ma, mb, mc, md, mx, my; /* pdf coord matrix */
862 double tmx, tmy; /* last 2 coords of text coord matrix */
863 #if PDF_CALC_DEBUG
864 int debug;
865 #endif
866 } pdf_coords;
868 #if PDF_CALC_DEBUG
869 static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
870 {
871 fprintf(stderr, "PDF CALC =============================\n");
872 fprintf(stderr, " '%s' at %f pt\n", node->text, node->size);
873 fprintf(stderr, " align h = %s, v = %s, sizep = %f, %f\n",
874 (node->halign == GFX_H_RIGHT ? "r" :
875 (node->halign == GFX_H_CENTER ? "c" :
876 (node->halign == GFX_H_LEFT ? "l" : "N"))),
877 (node->valign == GFX_V_TOP ? "t" :
878 (node->valign == GFX_V_CENTER ? "c" :
879 (node->valign == GFX_V_BOTTOM ? "b" : "N"))),
880 g->sizep.x, g->sizep.y);
881 fprintf(stderr, " r = %f = %f, cos = %f, sin = %f\n",
882 g->r, node->angle, g->cos_r, g->sin_r);
883 fprintf(stderr, " ascender = %f, descender = %f, baselineY = %f\n",
884 g->ascender, g->descender, g->baselineY);
885 fprintf(stderr, " sizep: %f, %f\n", g->sizep.x, g->sizep.y);
886 fprintf(stderr, " minp: %f, %f maxp = %f, %f\n",
887 g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
888 fprintf(stderr, " x = %f, y = %f\n", g->x, g->y);
889 fprintf(stderr, " tdx = %f, tdy = %f\n", g->tdx, g->tdy);
890 fprintf(stderr, " GM = %f, %f, %f, %f, %f, %f\n",
891 g->ma, g->mb, g->mc, g->md, g->mx, g->my);
892 fprintf(stderr, " TM = %f, %f, %f, %f, %f, %f\n",
893 g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
894 }
895 #endif
897 #if PDF_CALC_DEBUG
898 #define PDF_DD(x) if (g->debug) x;
899 #else
900 #define PDF_DD(x)
901 #endif
903 static void pdf_rotate(pdf_coords *g, pdf_point *p)
904 {
905 double x2 = g->cos_r * p->x - g->sin_r * p->y;
906 double y2 = g->sin_r * p->x + g->cos_r * p->y;
907 PDF_DD( fprintf(stderr, " rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
908 p->x = x2;
909 p->y = y2;
910 }
913 static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
914 {
915 pdf_point a, b, c;
916 #if PDF_CALC_DEBUG
917 /* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
918 g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
919 #endif
920 g->x = node->x;
921 g->y = page_height - node->y;
922 if (node->angle) {
923 g->r = 2 * M_PI * node->angle / 360.0;
924 g->cos_r = cos(g->r);
925 g->sin_r = sin(g->r);
926 } else {
927 g->r = 0;
928 g->cos_r = 1;
929 g->sin_r = 0;
930 }
931 g->ascender = afm_get_ascender(node->filename, node->size);
932 g->descender = afm_get_descender(node->filename, node->size);
933 g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
934 /* seems like libart ignores the descender when doing vertial-align = bottom,
935 so we do that too, to get labels v-aligning properly */
936 g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
937 g->baselineY = -g->ascender - g->sizep.y / 2;
938 a.x = g->sizep.x; a.y = g->sizep.y;
939 b.x = g->sizep.x; b.y = 0;
940 c.x = 0; c.y = g->sizep.y;
941 if (node->angle) {
942 pdf_rotate(g, &a);
943 pdf_rotate(g, &b);
944 pdf_rotate(g, &c);
945 }
946 g->minp.x = min3(a.x, b.x, c.x);
947 g->minp.y = min3(a.y, b.y, c.y);
948 g->maxp.x = max3(a.x, b.x, c.x);
949 g->maxp.y = max3(a.y, b.y, c.y);
950 /* The alignment parameters in node->valign and node->halign
951 specifies the alignment in the non-rotated coordinate system
952 (very unlike pdf/postscript), which complicates matters.
953 */
954 switch (node->halign) {
955 case GFX_H_RIGHT: g->tdx = -g->maxp.x; break;
956 case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
957 case GFX_H_LEFT: g->tdx = -g->minp.x; break;
958 case GFX_H_NULL: g->tdx = 0; break;
959 }
960 switch(node->valign){
961 case GFX_V_TOP: g->tdy = -g->maxp.y; break;
962 case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
963 case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
964 case GFX_V_NULL: g->tdy = 0; break;
965 }
966 g->ma = g->cos_r;
967 g->mb = g->sin_r;
968 g->mc = -g->sin_r;
969 g->md = g->cos_r;
970 g->mx = g->x + g->tdx;
971 g->my = g->y + g->tdy;
972 g->tmx = g->mx - g->ascender * g->mc;
973 g->tmy = g->my - g->ascender * g->md;
974 PDF_DD(pdf_dump_calc(node, g))
975 }
977 /* ------- SVG -------
978 SVG reference:
979 http://www.w3.org/TR/SVG/
980 */
981 static int svg_indent = 0;
982 static int svg_single_line = 0;
983 static const char *svg_default_font = "-dummy-";
984 typedef struct svg_dash
985 {
986 int dash_enable;
987 double dash_adjust, dash_len, dash_offset;
988 double adjusted_on, adjusted_off;
989 } svg_dash;
992 static void svg_print_indent(FILE *fp)
993 {
994 int i;
995 for (i = svg_indent - svg_single_line; i > 0; i--) {
996 putc(' ', fp);
997 putc(' ', fp);
998 }
999 }
1001 static void svg_start_tag(FILE *fp, const char *name)
1002 {
1003 svg_print_indent(fp);
1004 putc('<', fp);
1005 fputs(name, fp);
1006 svg_indent++;
1007 }
1009 static void svg_close_tag_single_line(FILE *fp)
1010 {
1011 svg_single_line++;
1012 putc('>', fp);
1013 }
1015 static void svg_close_tag(FILE *fp)
1016 {
1017 putc('>', fp);
1018 if (!svg_single_line)
1019 putc('\n', fp);
1020 }
1022 static void svg_end_tag(FILE *fp, const char *name)
1023 {
1024 /* name is NULL if closing empty-node tag */
1025 svg_indent--;
1026 if (svg_single_line)
1027 svg_single_line--;
1028 else if (name)
1029 svg_print_indent(fp);
1030 if (name != NULL) {
1031 fputs("</", fp);
1032 fputs(name, fp);
1033 } else {
1034 putc('/', fp);
1035 }
1036 svg_close_tag(fp);
1037 }
1039 static void svg_close_tag_empty_node(FILE *fp)
1040 {
1041 svg_end_tag(fp, NULL);
1042 }
1044 static void svg_write_text(FILE *fp, const char *text)
1045 {
1046 #ifdef HAVE_MBSTOWCS
1047 size_t clen;
1048 wchar_t *p, *cstr, ch;
1049 int text_count;
1050 if (!text)
1051 return;
1052 clen = strlen(text) + 1;
1053 cstr = malloc(sizeof(wchar_t) * clen);
1054 text_count = mbstowcs(cstr, text, clen);
1055 if (text_count == -1)
1056 text_count = mbstowcs(cstr, "Enc-Err", 6);
1057 p = cstr;
1058 #else
1059 const unsigned char *p = text, ch;
1060 if (!p)
1061 return;
1062 #endif
1063 while (1) {
1064 ch = *p++;
1065 ch = afm_fix_osx_charset(ch); /* unsafe macro */
1066 switch (ch) {
1067 case 0:
1068 #ifdef HAVE_MBSTOWCS
1069 free(cstr);
1070 #endif
1071 return;
1072 case '&': fputs("&", fp); break;
1073 case '<': fputs("<", fp); break;
1074 case '>': fputs(">", fp); break;
1075 case '"': fputs(""", fp); break;
1076 default:
1077 if (ch == 32) {
1078 if (p <= cstr + 1 || !*p || *p == 32)
1079 fputs(" ", fp); /* non-breaking space in unicode */
1080 else
1081 fputc(32, fp);
1082 } else if (ch < 32 || ch >= 127)
1083 fprintf(fp, "&#%d;", (int)ch);
1084 else
1085 putc((char)ch, fp);
1086 }
1087 }
1088 }
1090 static void svg_format_number(char *buf, int bufsize, double d)
1091 {
1092 /* omit decimals if integer to reduce filesize */
1093 char *p;
1094 snprintf(buf, bufsize, "%.2f", d);
1095 p = buf; /* doesn't trust snprintf return value */
1096 while (*p)
1097 p++;
1098 while (--p > buf) {
1099 char ch = *p;
1100 if (ch == '0') {
1101 *p = '\0'; /* zap trailing zeros */
1102 continue;
1103 }
1104 if (ch == '.')
1105 *p = '\0'; /* zap trailing dot */
1106 break;
1107 }
1108 }
1110 static void svg_write_number(FILE *fp, double d)
1111 {
1112 char buf[60];
1113 svg_format_number(buf, sizeof(buf), d);
1114 fputs(buf, fp);
1115 }
1117 static int svg_color_is_black(int c)
1118 {
1119 /* gfx_color_t is RRGGBBAA */
1120 return c == 0x000000FF;
1121 }
1123 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
1124 {
1125 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
1126 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
1127 gfx_color_t opacity = c & 0xFF;
1128 fprintf(fp, " %s=\"", attr);
1129 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
1130 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
1131 fprintf(fp, "#%03lX",
1132 ( ((rrggbb >> 8) & 0xF00)
1133 | ((rrggbb >> 4) & 0x0F0)
1134 | ( rrggbb & 0x00F)));
1135 } else {
1136 fprintf(fp, "#%06lX", rrggbb);
1137 }
1138 fputs("\"", fp);
1139 if (opacity != 0xFF) {
1140 fprintf(fp, " opacity=\"");
1141 svg_write_number(fp, opacity / 255.0);
1142 fputs("\"", fp);
1143 }
1144 }
1146 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
1147 {
1148 double offset;
1149 int mult;
1150 if (node->dash_on <= 0 || node->dash_off <= 0) {
1151 d->dash_enable = 0;
1152 return;
1153 }
1154 d->dash_enable = 1;
1155 d->dash_len = node->dash_on + node->dash_off;
1156 /* dash on/off adjustment due to round caps */
1157 d->dash_adjust = 0.8 * node->size;
1158 d->adjusted_on = node->dash_on - d->dash_adjust;
1159 if (d->adjusted_on < 0.01)
1160 d->adjusted_on = 0.01;
1161 d->adjusted_off = d->dash_len - d->adjusted_on;
1162 /* dash offset calc */
1163 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
1164 offset = node->path[0].y;
1165 else
1166 offset = node->path[0].x;
1167 mult = (int)fabs(offset / d->dash_len);
1168 d->dash_offset = offset - mult * d->dash_len;
1169 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
1170 d->dash_offset = d->dash_len - d->dash_offset;
1171 }
1173 static int svg_dash_equal(svg_dash *a, svg_dash *b)
1174 {
1175 if (a->dash_enable != b->dash_enable)
1176 return 0;
1177 if (a->adjusted_on != b->adjusted_on)
1178 return 0;
1179 if (a->adjusted_off != b->adjusted_off)
1180 return 0;
1181 /* rest of properties will be the same when on+off are */
1182 return 1;
1183 }
1185 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
1186 {
1187 svg_dash dash_info;
1188 svg_get_dash(node, &dash_info);
1189 fputs(" stroke-width=\"", fp);
1190 svg_write_number(fp, node->size);
1191 fputs("\"", fp);
1192 svg_write_color(fp, node->color, "stroke");
1193 fputs(" fill=\"none\"", fp);
1194 if (dash_info.dash_enable) {
1195 if (dash_info.dash_offset != 0) {
1196 fputs(" stroke-dashoffset=\"", fp);
1197 svg_write_number(fp, dash_info.dash_offset);
1198 fputs("\"", fp);
1199 }
1200 fputs(" stroke-dasharray=\"", fp);
1201 svg_write_number(fp, dash_info.adjusted_on);
1202 fputs(",", fp);
1203 svg_write_number(fp, dash_info.adjusted_off);
1204 fputs("\"", fp);
1205 }
1206 }
1208 static int svg_is_int_step(double a, double b)
1209 {
1210 double diff = fabs(a - b);
1211 return floor(diff) == diff;
1212 }
1214 static int svg_path_straight_segment(FILE *fp,
1215 double lastA, double currentA, double currentB,
1216 gfx_node_t *node,
1217 int segment_idx, int isx, char absChar, char relChar)
1218 {
1219 if (!svg_is_int_step(lastA, currentA)) {
1220 putc(absChar, fp);
1221 svg_write_number(fp, currentA);
1222 return 0;
1223 }
1224 if (segment_idx < node->points - 1) {
1225 ArtVpath *vec = node->path + segment_idx + 1;
1226 if (vec->code == ART_LINETO) {
1227 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1228 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1229 if (nextB == currentB
1230 && ((currentA >= lastA) == (nextA >= currentA))
1231 && svg_is_int_step(currentA, nextA)) {
1232 return 1; /* skip to next as it is a straight line */
1233 }
1234 }
1235 }
1236 putc(relChar, fp);
1237 svg_write_number(fp, currentA - lastA);
1238 return 0;
1239 }
1241 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1242 {
1243 int i;
1244 double lastX = 0, lastY = 0;
1245 /* for straight lines <path..> tags take less space than
1246 <line..> tags because of the efficient packing
1247 in the 'd' attribute */
1248 svg_start_tag(fp, "path");
1249 if (!multi)
1250 svg_common_path_attributes(fp, node);
1251 fputs(" d=\"", fp);
1252 /* specification of the 'd' attribute: */
1253 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1254 for (i = 0; i < node->points; i++) {
1255 ArtVpath *vec = node->path + i;
1256 double x = vec->x - LINEOFFSET;
1257 double y = vec->y - LINEOFFSET;
1258 switch (vec->code) {
1259 case ART_MOVETO_OPEN: /* fall-through */
1260 case ART_MOVETO:
1261 putc('M', fp);
1262 svg_write_number(fp, x);
1263 putc(',', fp);
1264 svg_write_number(fp, y);
1265 break;
1266 case ART_LINETO:
1267 /* try optimize filesize by using minimal lineto commands */
1268 /* without introducing rounding errors. */
1269 if (x == lastX) {
1270 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1271 continue;
1272 } else if (y == lastY) {
1273 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1274 continue;
1275 } else {
1276 putc('L', fp);
1277 svg_write_number(fp, x);
1278 putc(',', fp);
1279 svg_write_number(fp, y);
1280 }
1281 break;
1282 case ART_CURVETO: break; /* unsupported */
1283 case ART_END: break; /* nop */
1284 }
1285 lastX = x;
1286 lastY = y;
1287 }
1288 if (node->closed_path)
1289 fputs(" Z", fp);
1290 fputs("\"", fp);
1291 svg_close_tag_empty_node(fp);
1292 }
1294 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1295 {
1296 /* optimize for multiple paths with the same color, penwidth, etc. */
1297 int num = 1;
1298 gfx_node_t *node = *nodeR;
1299 gfx_node_t *next = node->next;
1300 while (next) {
1301 if (next->type != node->type
1302 || next->size != node->size
1303 || next->color != node->color
1304 || next->dash_on != node->dash_on
1305 || next->dash_off != node->dash_off)
1306 break;
1307 next = next->next;
1308 num++;
1309 }
1310 if (num == 1) {
1311 svg_path(fp, node, 0);
1312 return;
1313 }
1314 svg_start_tag(fp, "g");
1315 svg_common_path_attributes(fp, node);
1316 svg_close_tag(fp);
1317 while (num && node) {
1318 svg_path(fp, node, 1);
1319 if (!--num)
1320 break;
1321 node = node->next;
1322 *nodeR = node;
1323 }
1324 svg_end_tag(fp, "g");
1325 }
1327 static void svg_area(FILE *fp, gfx_node_t *node)
1328 {
1329 int i;
1330 double startX = 0, startY = 0;
1331 svg_start_tag(fp, "polygon");
1332 fputs(" ", fp);
1333 svg_write_color(fp, node->color, "fill");
1334 fputs(" points=\"", fp);
1335 for (i = 0; i < node->points; i++) {
1336 ArtVpath *vec = node->path + i;
1337 double x = vec->x - LINEOFFSET;
1338 double y = vec->y - LINEOFFSET;
1339 switch (vec->code) {
1340 case ART_MOVETO_OPEN: /* fall-through */
1341 case ART_MOVETO:
1342 svg_write_number(fp, x);
1343 putc(',', fp);
1344 svg_write_number(fp, y);
1345 startX = x;
1346 startY = y;
1347 break;
1348 case ART_LINETO:
1349 if (i == node->points - 2
1350 && node->path[i + 1].code == ART_END
1351 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1352 break; /* poly area always closed, no need for last point */
1353 }
1354 putc(' ', fp);
1355 svg_write_number(fp, x);
1356 putc(',', fp);
1357 svg_write_number(fp, y);
1358 break;
1359 case ART_CURVETO: break; /* unsupported */
1360 case ART_END: break; /* nop */
1361 }
1362 }
1363 fputs("\"", fp);
1364 svg_close_tag_empty_node(fp);
1365 }
1367 static void svg_text(FILE *fp, gfx_node_t *node)
1368 {
1369 pdf_coords g;
1370 const char *fontname;
1371 /* as svg has 0,0 in top-left corner (like most screens) instead of
1372 bottom-left corner like pdf and eps, we have to fake the coords
1373 using offset and inverse sin(r) value */
1374 int page_height = 1000;
1375 pdf_calc(page_height, node, &g);
1376 if (node->angle != 0) {
1377 svg_start_tag(fp, "g");
1378 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1379 skewed text */
1380 fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
1381 g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
1382 svg_close_tag(fp);
1383 }
1384 svg_start_tag(fp, "text");
1385 if (!node->angle) {
1386 fputs(" x=\"", fp);
1387 svg_write_number(fp, g.tmx);
1388 fputs("\" y=\"", fp);
1389 svg_write_number(fp, page_height - g.tmy);
1390 fputs("\"", fp);
1391 }
1392 fontname = afm_get_font_name(node->filename);
1393 if (strcmp(fontname, svg_default_font))
1394 fprintf(fp, " font-family=\"%s\"", fontname);
1395 fputs(" font-size=\"", fp);
1396 svg_write_number(fp, node->size);
1397 fputs("\"", fp);
1398 if (!svg_color_is_black(node->color))
1399 svg_write_color(fp, node->color, "fill");
1400 svg_close_tag_single_line(fp);
1401 /* support for node->tabwidth missing */
1402 svg_write_text(fp, node->text);
1403 svg_end_tag(fp, "text");
1404 if (node->angle != 0)
1405 svg_end_tag(fp, "g");
1406 }
1408 int gfx_render_svg (gfx_canvas_t *canvas,
1409 art_u32 width, art_u32 height,
1410 gfx_color_t background, FILE *fp){
1411 gfx_node_t *node = canvas->firstnode;
1412 /* Find the first font used, and assume it is the mostly used
1413 one. It reduces the number of font-familty attributes. */
1414 while (node) {
1415 if (node->type == GFX_TEXT && node->filename) {
1416 svg_default_font = afm_get_font_name(node->filename);
1417 break;
1418 }
1419 node = node->next;
1420 }
1421 fputs(
1422 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1423 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1424 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1425 "<!--\n"
1426 " SVG file created by\n"
1427 " RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1428 "\n"
1429 " The width/height attributes in the outhermost svg node\n"
1430 " are just default sizes for the browser which is used\n"
1431 " if the svg file is openened directly without being\n"
1432 " embedded in an html file.\n"
1433 " The viewBox is the local coord system for rrdtool.\n"
1434 "-->\n", fp);
1435 svg_start_tag(fp, "svg");
1436 fputs(" width=\"", fp);
1437 svg_write_number(fp, width * canvas->zoom);
1438 fputs("\" height=\"", fp);
1439 svg_write_number(fp, height * canvas->zoom);
1440 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1441 svg_write_number(fp, -LINEOFFSET);
1442 fputs(" ", fp);
1443 svg_write_number(fp, -LINEOFFSET);
1444 fputs(" ", fp);
1445 svg_write_number(fp, width - LINEOFFSET);
1446 fputs(" ", fp);
1447 svg_write_number(fp, height - LINEOFFSET);
1448 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1449 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1450 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1451 svg_close_tag(fp);
1452 svg_start_tag(fp, "rect");
1453 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1454 svg_write_color(fp, background, "fill");
1455 svg_close_tag_empty_node(fp);
1456 node = canvas->firstnode;
1457 while (node) {
1458 switch (node->type) {
1459 case GFX_LINE:
1460 svg_multi_path(fp, &node);
1461 break;
1462 case GFX_AREA:
1463 svg_area(fp, node);
1464 break;
1465 case GFX_TEXT:
1466 svg_text(fp, node);
1467 }
1468 node = node->next;
1469 }
1470 svg_end_tag(fp, "svg");
1471 return 0;
1472 }
1474 /* ------- EPS -------
1475 EPS and Postscript references:
1476 http://partners.adobe.com/asn/developer/technotes/postscript.html
1477 */
1479 typedef struct eps_font
1480 {
1481 const char *ps_font;
1482 int id;
1483 struct eps_font *next;
1484 } eps_font;
1486 typedef struct eps_state
1487 {
1488 FILE *fp;
1489 gfx_canvas_t *canvas;
1490 art_u32 page_width, page_height;
1491 eps_font *font_list;
1492 /*--*/
1493 gfx_color_t color;
1494 const char *font;
1495 double font_size;
1496 double line_width;
1497 int linecap, linejoin;
1498 int has_dash;
1499 } eps_state;
1501 static void eps_set_color(eps_state *state, gfx_color_t color)
1502 {
1503 #if USE_EPS_FAKE_ALPHA
1504 double a1, a2;
1505 #endif
1506 /* gfx_color_t is RRGGBBAA */
1507 if (state->color == color)
1508 return;
1509 #if USE_EPS_FAKE_ALPHA
1510 a1 = (color & 255) / 255.0;
1511 a2 = 255 * (1 - a1);
1512 #define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
1513 #else
1514 #define eps_color_calc(x) (int)( (x) & 255)
1515 #endif
1516 /* gfx_color_t is RRGGBBAA */
1517 if (state->color == color)
1518 return;
1519 fprintf(state->fp, "%d %d %d Rgb\n",
1520 eps_color_calc(color >> 24),
1521 eps_color_calc(color >> 16),
1522 eps_color_calc(color >> 8));
1523 state->color = color;
1524 }
1526 static int eps_add_font(eps_state *state, gfx_node_t *node)
1527 {
1528 /* The fonts list could be postponed to the end using
1529 (atend), but let's be nice and have them in the header. */
1530 const char *ps_font = afm_get_font_postscript_name(node->filename);
1531 eps_font *ef;
1532 for (ef = state->font_list; ef; ef = ef->next) {
1533 if (!strcmp(ps_font, ef->ps_font))
1534 return 0;
1535 }
1536 ef = malloc(sizeof(eps_font));
1537 if (ef == NULL) {
1538 rrd_set_error("malloc for eps_font");
1539 return -1;
1540 }
1541 ef->next = state->font_list;
1542 ef->ps_font = ps_font;
1543 state->font_list = ef;
1544 return 0;
1545 }
1547 static void eps_list_fonts(eps_state *state, const char *dscName)
1548 {
1549 eps_font *ef;
1550 int lineLen = strlen(dscName);
1551 if (!state->font_list)
1552 return;
1553 fputs(dscName, state->fp);
1554 for (ef = state->font_list; ef; ef = ef->next) {
1555 int nameLen = strlen(ef->ps_font);
1556 if (lineLen + nameLen > 100 && lineLen) {
1557 fputs("\n", state->fp);
1558 fputs("%%- \n", state->fp);
1559 lineLen = 5;
1560 } else {
1561 fputs(" ", state->fp);
1562 lineLen++;
1563 }
1564 fputs(ef->ps_font, state->fp);
1565 lineLen += nameLen;
1566 }
1567 fputs("\n", state->fp);
1568 }
1570 static void eps_define_fonts(eps_state *state)
1571 {
1572 eps_font *ef;
1573 if (!state->font_list)
1574 return;
1575 for (ef = state->font_list; ef; ef = ef->next) {
1576 /* PostScript¨ LANGUAGE REFERENCE third edition
1577 page 349 */
1578 fprintf(state->fp,
1579 "%%\n"
1580 "/%s findfont dup length dict begin\n"
1581 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1582 "/Encoding ISOLatin1Encoding def\n"
1583 "currentdict end\n"
1584 "/%s-ISOLatin1 exch definefont pop\n"
1585 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1586 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1587 }
1588 }
1590 static int eps_prologue(eps_state *state)
1591 {
1592 gfx_node_t *node;
1593 fputs(
1594 "%!PS-Adobe-3.0 EPSF-3.0\n"
1595 "%%Creator: RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1596 /* can't like weird chars here */
1597 "%%Title: (RRDtool output)\n"
1598 "%%DocumentData: Clean7Bit\n"
1599 "", state->fp);
1600 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1601 state->page_width, state->page_height);
1602 for (node = state->canvas->firstnode; node; node = node->next) {
1603 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1604 return -1;
1605 }
1606 eps_list_fonts(state, "%%DocumentFonts:");
1607 eps_list_fonts(state, "%%DocumentNeededFonts:");
1608 fputs(
1609 "%%EndComments\n"
1610 "%%BeginProlog\n"
1611 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1612 "/bd { bind def } bind def\n"
1613 "", state->fp);
1614 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1615 fputs(
1616 "/X2 {X exch X exch} bd\n"
1617 "/M {X2 moveto} bd\n"
1618 "/L {X2 lineto} bd\n"
1619 "/m {moveto} bd\n"
1620 "/l {lineto} bd\n"
1621 "/S {stroke} bd\n"
1622 "/CP {closepath} bd\n"
1623 "/WS {setlinewidth stroke} bd\n"
1624 "/F {fill} bd\n"
1625 "/T1 {gsave} bd\n"
1626 "/T2 {concat 0 0 moveto show grestore} bd\n"
1627 "/T {moveto show} bd\n"
1628 "/Rgb { 255.0 div 3 1 roll\n"
1629 " 255.0 div 3 1 roll \n"
1630 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1631 "", state->fp);
1632 eps_define_fonts(state);
1633 return 0;
1634 }
1636 static void eps_clear_dash(eps_state *state)
1637 {
1638 if (!state->has_dash)
1639 return;
1640 state->has_dash = 0;
1641 fputs("[1 0] 0 setdash\n", state->fp);
1642 }
1644 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1645 {
1646 int i;
1647 FILE *fp = state->fp;
1648 int useOffset = 0;
1649 int clearDashIfAny = 1;
1650 eps_set_color(state, node->color);
1651 if (node->type == GFX_LINE) {
1652 svg_dash dash_info;
1653 if (state->linecap != 1) {
1654 fputs("1 setlinecap\n", fp);
1655 state->linecap = 1;
1656 }
1657 if (state->linejoin != 1) {
1658 fputs("1 setlinejoin\n", fp);
1659 state->linejoin = 1;
1660 }
1661 svg_get_dash(node, &dash_info);
1662 if (dash_info.dash_enable) {
1663 clearDashIfAny = 0;
1664 state->has_dash = 1;
1665 fputs("[", fp);
1666 svg_write_number(fp, dash_info.adjusted_on);
1667 fputs(" ", fp);
1668 svg_write_number(fp, dash_info.adjusted_off);
1669 fputs("] ", fp);
1670 svg_write_number(fp, dash_info.dash_offset);
1671 fputs(" setdash\n", fp);
1672 }
1673 }
1674 if (clearDashIfAny)
1675 eps_clear_dash(state);
1676 for (i = 0; i < node->points; i++) {
1677 ArtVpath *vec = node->path + i;
1678 double x = vec->x;
1679 double y = state->page_height - vec->y;
1680 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1681 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1682 if (useOffset) {
1683 x -= LINEOFFSET;
1684 y -= LINEOFFSET;
1685 }
1686 switch (vec->code) {
1687 case ART_MOVETO_OPEN: /* fall-through */
1688 case ART_MOVETO:
1689 svg_write_number(fp, x);
1690 fputc(' ', fp);
1691 svg_write_number(fp, y);
1692 fputc(' ', fp);
1693 fputs(useOffset ? "M\n" : "m\n", fp);
1694 break;
1695 case ART_LINETO:
1696 svg_write_number(fp, x);
1697 fputc(' ', fp);
1698 svg_write_number(fp, y);
1699 fputc(' ', fp);
1700 fputs(useOffset ? "L\n" : "l\n", fp);
1701 break;
1702 case ART_CURVETO: break; /* unsupported */
1703 case ART_END: break; /* nop */
1704 }
1705 }
1706 if (node->type == GFX_LINE) {
1707 if (node->closed_path)
1708 fputs("CP ", fp);
1709 if (node->size != state->line_width) {
1710 state->line_width = node->size;
1711 svg_write_number(fp, state->line_width);
1712 fputs(" WS\n", fp);
1713 } else {
1714 fputs("S\n", fp);
1715 }
1716 } else {
1717 fputs("F\n", fp);
1718 }
1719 }
1721 static void eps_write_text(eps_state *state, gfx_node_t *node)
1722 {
1723 FILE *fp = state->fp;
1724 const char *ps_font = afm_get_font_postscript_name(node->filename);
1725 int lineLen = 0;
1726 pdf_coords g;
1727 #ifdef HAVE_MBSTOWCS
1728 size_t clen;
1729 wchar_t *p, *cstr, ch;
1730 int text_count;
1731 if (!node->text)
1732 return;
1733 clen = strlen(node->text) + 1;
1734 cstr = malloc(sizeof(wchar_t) * clen);
1735 text_count = mbstowcs(cstr, node->text, clen);
1736 if (text_count == -1)
1737 text_count = mbstowcs(cstr, "Enc-Err", 6);
1738 p = cstr;
1739 #else
1740 const unsigned char *p = node->text, ch;
1741 if (!p)
1742 return;
1743 #endif
1744 pdf_calc(state->page_height, node, &g);
1745 eps_set_color(state, node->color);
1746 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1747 state->font = ps_font;
1748 state->font_size = node->size;
1749 svg_write_number(fp, state->font_size);
1750 fprintf(fp, " SetFont-%s\n", state->font);
1751 }
1752 if (node->angle)
1753 fputs("T1 ", fp);
1754 fputs("(", fp);
1755 lineLen = 20;
1756 while (1) {
1757 ch = *p;
1758 if (!ch)
1759 break;
1760 ch = afm_fix_osx_charset(ch); /* unsafe macro */
1761 if (++lineLen > 70) {
1762 fputs("\\\n", fp); /* backslash and \n */
1763 lineLen = 0;
1764 }
1765 switch (ch) {
1766 case '%':
1767 case '(':
1768 case ')':
1769 case '\\':
1770 fputc('\\', fp);
1771 fputc(ch, fp);
1772 break;
1773 case '\n':
1774 fputs("\\n", fp);
1775 break;
1776 case '\r':
1777 fputs("\\r", fp);
1778 break;
1779 case '\t':
1780 fputs("\\t", fp);
1781 break;
1782 default:
1783 if (ch > 255) {
1784 fputc('?', fp);
1785 } else if (ch >= 126 || ch < 32) {
1786 fprintf(fp, "\\%03o", (unsigned int)ch);
1787 lineLen += 3;
1788 } else {
1789 fputc(ch, fp);
1790 }
1791 }
1792 p++;
1793 }
1794 #ifdef HAVE_MBSTOWCS
1795 free(cstr);
1796 #endif
1797 if (node->angle) {
1798 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1799 skewed text */
1800 fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
1801 g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
1802 } else {
1803 fputs(") ", fp);
1804 svg_write_number(fp, g.tmx);
1805 fputs(" ", fp);
1806 svg_write_number(fp, g.tmy);
1807 fputs(" T\n", fp);
1808 }
1809 }
1811 static int eps_write_content(eps_state *state)
1812 {
1813 gfx_node_t *node;
1814 fputs("%\n", state->fp);
1815 for (node = state->canvas->firstnode; node; node = node->next) {
1816 switch (node->type) {
1817 case GFX_LINE:
1818 case GFX_AREA:
1819 eps_write_linearea(state, node);
1820 break;
1821 case GFX_TEXT:
1822 eps_write_text(state, node);
1823 break;
1824 }
1825 }
1826 return 0;
1827 }
1829 int gfx_render_eps (gfx_canvas_t *canvas,
1830 art_u32 width, art_u32 height,
1831 gfx_color_t background, FILE *fp){
1832 struct eps_state state;
1833 state.fp = fp;
1834 state.canvas = canvas;
1835 state.page_width = width;
1836 state.page_height = height;
1837 state.font = "no-default-font";
1838 state.font_size = -1;
1839 state.color = 0; /* black */
1840 state.font_list = NULL;
1841 state.linecap = -1;
1842 state.linejoin = -1;
1843 state.has_dash = 0;
1844 state.line_width = 1;
1845 if (eps_prologue(&state) == -1)
1846 return -1;
1847 eps_set_color(&state, background);
1848 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1849 height, width, height, width);
1850 if (eps_write_content(&state) == -1)
1851 return 0;
1852 fputs("showpage\n", fp);
1853 fputs("%%EOF\n", fp);
1854 while (state.font_list) {
1855 eps_font *next = state.font_list->next;
1856 free(state.font_list);
1857 state.font_list = next;
1858 }
1859 return 0;
1860 }
1862 /* ------- PDF -------
1863 PDF references page:
1864 http://partners.adobe.com/public/developer/pdf/index_reference.html
1865 */
1867 typedef struct pdf_buffer
1868 {
1869 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1870 char *data;
1871 int alloc_size, current_size;
1872 struct pdf_buffer *previous_buffer, *next_buffer;
1873 struct pdf_state *state;
1874 } pdf_buffer;
1876 typedef struct pdf_font
1877 {
1878 const char *ps_font;
1879 pdf_buffer obj;
1880 struct pdf_font *next;
1881 } pdf_font;
1883 typedef struct pdf_state
1884 {
1885 FILE *fp;
1886 gfx_canvas_t *canvas;
1887 art_u32 page_width, page_height;
1888 pdf_font *font_list;
1889 pdf_buffer *first_buffer, *last_buffer;
1890 int pdf_file_pos;
1891 int has_failed;
1892 /*--*/
1893 gfx_color_t stroke_color, fill_color;
1894 int font_id;
1895 double font_size;
1896 double line_width;
1897 svg_dash dash;
1898 int linecap, linejoin;
1899 int last_obj_id;
1900 /*--*/
1901 pdf_buffer pdf_header;
1902 pdf_buffer info_obj, catalog_obj, pages_obj, page1_obj;
1903 pdf_buffer fontsdict_obj;
1904 pdf_buffer graph_stream;
1905 } pdf_state;
1907 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1908 {
1909 int initial_size = 32;
1910 buf->state = state;
1911 buf->id = -42;
1912 buf->alloc_size = 0;
1913 buf->current_size = 0;
1914 buf->data = (char*)malloc(initial_size);
1915 buf->is_obj = 0;
1916 buf->previous_buffer = NULL;
1917 buf->next_buffer = NULL;
1918 if (buf->data == NULL) {
1919 rrd_set_error("malloc for pdf_buffer data");
1920 state->has_failed = 1;
1921 return;
1922 }
1923 buf->alloc_size = initial_size;
1924 if (state->last_buffer)
1925 state->last_buffer->next_buffer = buf;
1926 if (state->first_buffer == NULL)
1927 state->first_buffer = buf;
1928 buf->previous_buffer = state->last_buffer;
1929 state->last_buffer = buf;
1930 }
1932 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1933 {
1934 if (len <= 0)
1935 return;
1936 if (buf->alloc_size < buf->current_size + len) {
1937 int new_size = buf->alloc_size;
1938 char *new_buf;
1939 while (new_size < buf->current_size + len)
1940 new_size *= 4;
1941 new_buf = (char*)malloc(new_size);
1942 if (new_buf == NULL) {
1943 rrd_set_error("re-malloc for pdf_buffer data");
1944 buf->state->has_failed = 1;
1945 return;
1946 }
1947 memcpy(new_buf, buf->data, buf->current_size);
1948 free(buf->data);
1949 buf->data = new_buf;
1950 buf->alloc_size = new_size;
1951 }
1952 memcpy(buf->data + buf->current_size, text, len);
1953 buf->current_size += len;
1954 }
1956 static void pdf_put_char(pdf_buffer *buf, char c)
1957 {
1958 if (buf->alloc_size >= buf->current_size + 1) {
1959 buf->data[buf->current_size++] = c;
1960 } else {
1961 char tmp[1];
1962 tmp[0] = (char)c;
1963 pdf_put(buf, tmp, 1);
1964 }
1965 }
1967 static void pdf_puts(pdf_buffer *buf, const char *text)
1968 {
1969 pdf_put(buf, text, strlen(text));
1970 }
1972 static void pdf_indent(pdf_buffer *buf)
1973 {
1974 pdf_puts(buf, "\t");
1975 }
1977 static void pdf_putsi(pdf_buffer *buf, const char *text)
1978 {
1979 pdf_indent(buf);
1980 pdf_puts(buf, text);
1981 }
1983 static void pdf_putint(pdf_buffer *buf, int i)
1984 {
1985 char tmp[20];
1986 sprintf(tmp, "%d", i);
1987 pdf_puts(buf, tmp);
1988 }
1990 static void pdf_putnumber(pdf_buffer *buf, double d)
1991 {
1992 char tmp[50];
1993 svg_format_number(tmp, sizeof(tmp), d);
1994 pdf_puts(buf, tmp);
1995 }
1997 static void pdf_put_string_contents_wide(pdf_buffer *buf, const afm_char *text)
1998 {
1999 const afm_char *p = text;
2000 while (1) {
2001 afm_char ch = *p;
2002 ch = afm_fix_osx_charset(ch); /* unsafe macro */
2003 switch (ch) {
2004 case 0:
2005 return;
2006 case '(':
2007 pdf_puts(buf, "\\(");
2008 break;
2009 case ')':
2010 pdf_puts(buf, "\\)");
2011 break;
2012 case '\\':
2013 pdf_puts(buf, "\\\\");
2014 break;
2015 case '\n':
2016 pdf_puts(buf, "\\n");
2017 break;
2018 case '\r':
2019 pdf_puts(buf, "\\r");
2020 break;
2021 case '\t':
2022 pdf_puts(buf, "\\t");
2023 break;
2024 default:
2025 if (ch > 255) {
2026 pdf_put_char(buf, '?');
2027 } else if (ch >= 126 || ch < 32) {
2028 pdf_put_char(buf, ch);
2029 } else if (ch >= 0 && ch <= 255) {
2030 char tmp[10];
2031 snprintf(tmp, sizeof(tmp), "\\%03o", (int)ch);
2032 pdf_puts(buf, tmp);
2033 }
2034 }
2035 p++;
2036 }
2037 }
2039 static void pdf_put_string_contents(pdf_buffer *buf, const char *text)
2040 {
2041 #ifdef HAVE_MBSTOWCS
2042 size_t clen = strlen(text) + 1;
2043 wchar_t *cstr = malloc(sizeof(wchar_t) * clen);
2044 int text_count = mbstowcs(cstr, text, clen);
2045 if (text_count == -1)
2046 text_count = mbstowcs(cstr, "Enc-Err", 6);
2047 pdf_put_string_contents_wide(buf, cstr);
2048 #if 0
2049 if (*text == 'W') {
2050 fprintf(stderr, "Decoding utf8 for '%s'\n", text);
2051 wchar_t *p = cstr;
2052 char *pp = text;
2053 fprintf(stderr, "sz wc = %d\n", sizeof(wchar_t));
2054 while (*p) {
2055 fprintf(stderr, " %d = %c versus %d = %c\n", *p, (char)*p, 255 & (int)*pp, *pp);
2056 p++;
2057 pp++;
2058 }
2059 }
2060 #endif
2061 free(cstr);
2062 #else
2063 pdf_put_string_contents_wide(buf, text);
2064 #endif
2065 }
2067 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
2068 {
2069 pdf_init_buffer(state, buf);
2070 buf->id = ++state->last_obj_id;
2071 buf->is_obj = 1;
2072 buf->is_stream = 0;
2073 }
2075 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
2076 {
2077 pdf_init_object(state, buf);
2078 buf->is_dict = 1;
2079 }
2081 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
2082 gfx_color_t *current_color, const char *op)
2083 {
2084 #if USE_PDF_FAKE_ALPHA
2085 double a1, a2;
2086 #endif
2087 /* gfx_color_t is RRGGBBAA */
2088 if (*current_color == color)
2089 return;
2090 #if USE_PDF_FAKE_ALPHA
2091 a1 = (color & 255) / 255.0;
2092 a2 = 1 - a1;
2093 #define pdf_color_calc(x) ( ((x) & 255) / 255.0 * a1 + a2)
2094 #else
2095 #define pdf_color_calc(x) ( ((x) & 255) / 255.0)
2096 #endif
2097 pdf_putnumber(buf, pdf_color_calc(color >> 24));
2098 pdf_puts(buf, " ");
2099 pdf_putnumber(buf, pdf_color_calc(color >> 16));
2100 pdf_puts(buf, " ");
2101 pdf_putnumber(buf, pdf_color_calc(color >> 8));
2102 pdf_puts(buf, " ");
2103 pdf_puts(buf, op);
2104 pdf_puts(buf, "\n");
2105 *current_color = color;
2106 }
2108 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
2109 {
2110 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
2111 }
2113 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
2114 {
2115 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
2116 }
2118 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
2119 {
2120 const char *ps_font = afm_get_font_postscript_name(node->filename);
2121 pdf_font *ef;
2122 for (ef = state->font_list; ef; ef = ef->next) {
2123 if (!strcmp(ps_font, ef->ps_font))
2124 return ef;
2125 }
2126 return NULL;
2127 }
2129 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
2130 {
2131 pdf_font *ef = pdf_find_font(state, node);
2132 if (ef)
2133 return;
2134 ef = malloc(sizeof(pdf_font));
2135 if (ef == NULL) {
2136 rrd_set_error("malloc for pdf_font");
2137 state->has_failed = 1;
2138 return;
2139 }
2140 pdf_init_dict(state, &ef->obj);
2141 ef->next = state->font_list;
2142 ef->ps_font = afm_get_font_postscript_name(node->filename);
2143 state->font_list = ef;
2144 /* fonts dict */
2145 pdf_putsi(&state->fontsdict_obj, "/F");
2146 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2147 pdf_puts(&state->fontsdict_obj, " ");
2148 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2149 pdf_puts(&state->fontsdict_obj, " 0 R\n");
2150 /* fonts def */
2151 pdf_putsi(&ef->obj, "/Type /Font\n");
2152 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
2153 pdf_putsi(&ef->obj, "/Name /F");
2154 pdf_putint(&ef->obj, ef->obj.id);
2155 pdf_puts(&ef->obj, "\n");
2156 pdf_putsi(&ef->obj, "/BaseFont /");
2157 pdf_puts(&ef->obj, ef->ps_font);
2158 pdf_puts(&ef->obj, "\n");
2159 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
2160 /* 'Cp1252' (this is latin 1 extended with 27 characters;
2161 the encoding is also known as 'winansi')
2162 http://www.lowagie.com/iText/tutorial/ch09.html */
2163 }
2165 static void pdf_create_fonts(pdf_state *state)
2166 {
2167 gfx_node_t *node;
2168 for (node = state->canvas->firstnode; node; node = node->next) {
2169 if (node->type == GFX_TEXT)
2170 pdf_add_font(state, node);
2171 }
2172 }
2174 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
2175 {
2176 int i;
2177 pdf_buffer *s = &state->graph_stream;
2178 if (node->type == GFX_LINE) {
2179 svg_dash dash_info;
2180 svg_get_dash(node, &dash_info);
2181 if (!svg_dash_equal(&dash_info, &state->dash)) {
2182 state->dash = dash_info;
2183 if (dash_info.dash_enable) {
2184 pdf_puts(s, "[");
2185 pdf_putnumber(s, dash_info.adjusted_on);
2186 pdf_puts(s, " ");
2187 pdf_putnumber(s, dash_info.adjusted_off);
2188 pdf_puts(s, "] ");
2189 pdf_putnumber(s, dash_info.dash_offset);
2190 pdf_puts(s, " d\n");
2191 } else {
2192 pdf_puts(s, "[] 0 d\n");
2193 }
2194 }
2195 pdf_set_stroke_color(s, node->color);
2196 if (state->linecap != 1) {
2197 pdf_puts(s, "1 j\n");
2198 state->linecap = 1;
2199 }
2200 if (state->linejoin != 1) {
2201 pdf_puts(s, "1 J\n");
2202 state->linejoin = 1;
2203 }
2204 if (node->size != state->line_width) {
2205 state->line_width = node->size;
2206 pdf_putnumber(s, state->line_width);
2207 pdf_puts(s, " w\n");
2208 }
2209 } else {
2210 pdf_set_fill_color(s, node->color);
2211 }
2212 for (i = 0; i < node->points; i++) {
2213 ArtVpath *vec = node->path + i;
2214 double x = vec->x;
2215 double y = state->page_height - vec->y;
2216 if (node->type == GFX_AREA) {
2217 x += LINEOFFSET; /* adjust for libart handling of areas */
2218 y -= LINEOFFSET;
2219 }
2220 switch (vec->code) {
2221 case ART_MOVETO_OPEN: /* fall-through */
2222 case ART_MOVETO:
2223 pdf_putnumber(s, x);
2224 pdf_puts(s, " ");
2225 pdf_putnumber(s, y);
2226 pdf_puts(s, " m\n");
2227 break;
2228 case ART_LINETO:
2229 pdf_putnumber(s, x);
2230 pdf_puts(s, " ");
2231 pdf_putnumber(s, y);
2232 pdf_puts(s, " l\n");
2233 break;
2234 case ART_CURVETO: break; /* unsupported */
2235 case ART_END: break; /* nop */
2236 }
2237 }
2238 if (node->type == GFX_LINE) {
2239 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
2240 } else {
2241 pdf_puts(s, "f\n");
2242 }
2243 }
2246 static void pdf_write_matrix(pdf_state *state, gfx_node_t *node, pdf_coords *g, int useTM)
2247 {
2248 char tmp[150];
2249 pdf_buffer *s = &state->graph_stream;
2250 if (node->angle == 0) {
2251 pdf_puts(s, "1 0 0 1 ");
2252 pdf_putnumber(s, useTM ? g->tmx : g->mx);
2253 pdf_puts(s, " ");
2254 pdf_putnumber(s, useTM ? g->tmy : g->my);
2255 } else {
2256 /* can't use svg_write_number as 2 decimals is far from enough to avoid
2257 skewed text */
2258 sprintf(tmp, "%f %f %f %f %f %f",
2259 g->ma, g->mb, g->mc, g->md,
2260 useTM ? g->tmx : g->mx,
2261 useTM ? g->tmy : g->my);
2262 pdf_puts(s, tmp);
2263 }
2264 }
2266 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
2267 int last_was_text, int next_is_text)
2268 {
2269 pdf_coords g;
2270 pdf_buffer *s = &state->graph_stream;
2271 pdf_font *font = pdf_find_font(state, node);
2272 if (font == NULL) {
2273 rrd_set_error("font disappeared");
2274 state->has_failed = 1;
2275 return;
2276 }
2277 pdf_calc(state->page_height, node, &g);
2278 #if PDF_CALC_DEBUG
2279 pdf_puts(s, "q % debug green box\n");
2280 pdf_write_matrix(state, node, &g, 0);
2281 pdf_puts(s, " cm\n");
2282 pdf_set_fill_color(s, 0x90FF9000);
2283 pdf_puts(s, "0 0.4 0 rg\n");
2284 pdf_puts(s, "0 0 ");
2285 pdf_putnumber(s, g.sizep.x);
2286 pdf_puts(s, " ");
2287 pdf_putnumber(s, g.sizep.y);
2288 pdf_puts(s, " re\n");
2289 pdf_puts(s, "f\n");
2290 pdf_puts(s, "Q\n");
2291 #endif
2292 pdf_set_fill_color(s, node->color);
2293 if (PDF_CALC_DEBUG || !last_was_text)
2294 pdf_puts(s, "BT\n");
2295 if (state->font_id != font->obj.id || node->size != state->font_size) {
2296 state->font_id = font->obj.id;
2297 state->font_size = node->size;
2298 pdf_puts(s, "/F");
2299 pdf_putint(s, font->obj.id);
2300 pdf_puts(s, " ");
2301 pdf_putnumber(s, node->size);
2302 pdf_puts(s, " Tf\n");
2303 }
2304 pdf_write_matrix(state, node, &g, 1);
2305 pdf_puts(s, " Tm\n");
2306 pdf_puts(s, "(");
2307 pdf_put_string_contents(s, node->text);
2308 pdf_puts(s, ") Tj\n");
2309 if (PDF_CALC_DEBUG || !next_is_text)
2310 pdf_puts(s, "ET\n");
2311 }
2313 static void pdf_write_content(pdf_state *state)
2314 {
2315 gfx_node_t *node;
2316 int last_was_text = 0, next_is_text;
2317 for (node = state->canvas->firstnode; node; node = node->next) {
2318 switch (node->type) {
2319 case GFX_LINE:
2320 case GFX_AREA:
2321 pdf_write_linearea(state, node);
2322 break;
2323 case GFX_TEXT:
2324 next_is_text = node->next && node->next->type == GFX_TEXT;
2325 pdf_write_text(state, node, last_was_text, next_is_text);
2326 break;
2327 }
2328 last_was_text = node->type == GFX_TEXT;
2329 }
2330 }
2332 static void pdf_init_document(pdf_state *state)
2333 {
2334 pdf_init_buffer(state, &state->pdf_header);
2335 pdf_init_dict(state, &state->catalog_obj);
2336 pdf_init_dict(state, &state->info_obj);
2337 pdf_init_dict(state, &state->pages_obj);
2338 pdf_init_dict(state, &state->page1_obj);
2339 pdf_init_dict(state, &state->fontsdict_obj);
2340 pdf_create_fonts(state);
2341 if (state->has_failed)
2342 return;
2343 /* make stream last object in file */
2344 pdf_init_object(state, &state->graph_stream);
2345 state->graph_stream.is_stream = 1;
2346 }
2348 static void pdf_setup_document(pdf_state *state)
2349 {
2350 const char *creator = "RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch";
2351 /* all objects created by now, so init code can reference them */
2352 /* HEADER */
2353 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2354 /* following 8 bit comment is recommended by Adobe for
2355 indicating binary file to file transfer applications */
2356 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2357 /* INFO */
2358 pdf_putsi(&state->info_obj, "/Creator (");
2359 pdf_put_string_contents(&state->info_obj, creator);
2360 pdf_puts(&state->info_obj, ")\n");
2361 /* CATALOG */
2362 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2363 pdf_putsi(&state->catalog_obj, "/Pages ");
2364 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2365 pdf_puts(&state->catalog_obj, " 0 R\n");
2366 /* PAGES */
2367 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2368 pdf_putsi(&state->pages_obj, "/Kids [");
2369 pdf_putint(&state->pages_obj, state->page1_obj.id);
2370 pdf_puts(&state->pages_obj, " 0 R]\n");
2371 pdf_putsi(&state->pages_obj, "/Count 1\n");
2372 /* PAGE 1 */
2373 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2374 pdf_putsi(&state->page1_obj, "/Parent ");
2375 pdf_putint(&state->page1_obj, state->pages_obj.id);
2376 pdf_puts(&state->page1_obj, " 0 R\n");
2377 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2378 pdf_putint(&state->page1_obj, state->page_width);
2379 pdf_puts(&state->page1_obj, " ");
2380 pdf_putint(&state->page1_obj, state->page_height);
2381 pdf_puts(&state->page1_obj, "]\n");
2382 pdf_putsi(&state->page1_obj, "/Contents ");
2383 pdf_putint(&state->page1_obj, state->graph_stream.id);
2384 pdf_puts(&state->page1_obj, " 0 R\n");
2385 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2386 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2387 pdf_puts(&state->page1_obj, " 0 R >>\n");
2388 }
2390 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2391 {
2392 fputs(text, state->fp);
2393 state->pdf_file_pos += strlen(text);
2394 }
2396 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2397 {
2398 char tmp[40];
2399 buf->pdf_file_pos = state->pdf_file_pos;
2400 if (buf->is_obj) {
2401 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2402 pdf_write_string_to_file(state, tmp);
2403 }
2404 if (buf->is_dict)
2405 pdf_write_string_to_file(state, "<<\n");
2406 if (buf->is_stream) {
2407 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2408 pdf_write_string_to_file(state, tmp);
2409 pdf_write_string_to_file(state, "stream\n");
2410 }
2411 fwrite(buf->data, 1, buf->current_size, state->fp);
2412 state->pdf_file_pos += buf->current_size;
2413 if (buf->is_stream)
2414 pdf_write_string_to_file(state, "endstream\n");
2415 if (buf->is_dict)
2416 pdf_write_string_to_file(state, ">>\n");
2417 if (buf->is_obj)
2418 pdf_write_string_to_file(state, "endobj\n");
2419 }
2421 static void pdf_write_to_file(pdf_state *state)
2422 {
2423 pdf_buffer *buf = state->first_buffer;
2424 int xref_pos;
2425 state->pdf_file_pos = 0;
2426 pdf_write_buf_to_file(state, &state->pdf_header);
2427 while (buf) {
2428 if (buf->is_obj)
2429 pdf_write_buf_to_file(state, buf);
2430 buf = buf->next_buffer;
2431 }
2432 xref_pos = state->pdf_file_pos;
2433 fprintf(state->fp, "xref\n");
2434 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2435 /* TOC lines must be exactly 20 bytes including \n */
2436 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2437 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2438 if (buf->is_obj)
2439 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2440 }
2441 fprintf(state->fp, "trailer\n");
2442 fprintf(state->fp, "<<\n");
2443 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2444 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2445 fprintf(state->fp, "\t/Info %d 0 R\n", state->info_obj.id);
2446 fprintf(state->fp, ">>\n");
2447 fprintf(state->fp, "startxref\n");
2448 fprintf(state->fp, "%d\n", xref_pos);
2449 fputs("%%EOF\n", state->fp);
2450 }
2452 static void pdf_free_resources(pdf_state *state)
2453 {
2454 pdf_buffer *buf = state->first_buffer;
2455 while (buf) {
2456 free(buf->data);
2457 buf->data = NULL;
2458 buf->alloc_size = buf->current_size = 0;
2459 buf = buf->next_buffer;
2460 }
2461 while (state->font_list) {
2462 pdf_font *next = state->font_list->next;
2463 free(state->font_list);
2464 state->font_list = next;
2465 }
2466 }
2468 int gfx_render_pdf (gfx_canvas_t *canvas,
2469 art_u32 width, art_u32 height,
2470 gfx_color_t UNUSED(background), FILE *fp){
2471 struct pdf_state state;
2472 memset(&state, 0, sizeof(pdf_state));
2473 state.fp = fp;
2474 state.canvas = canvas;
2475 state.page_width = width;
2476 state.page_height = height;
2477 state.font_id = -1;
2478 state.font_size = -1;
2479 state.font_list = NULL;
2480 state.linecap = -1;
2481 state.linejoin = -1;
2482 pdf_init_document(&state);
2483 /*
2484 pdf_set_color(&state, background);
2485 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2486 height, width, height, width);
2487 */
2488 if (!state.has_failed)
2489 pdf_write_content(&state);
2490 if (!state.has_failed)
2491 pdf_setup_document(&state);
2492 if (!state.has_failed)
2493 pdf_write_to_file(&state);
2494 pdf_free_resources(&state);
2495 return state.has_failed ? -1 : 0;
2496 }