a94afbf1b08af0220e868fc91b4660978d2434eb
1 /****************************************************************************
2 * RRDtool 1.2.27 Copyright by Tobi Oetiker, 1997-2008
3 ****************************************************************************
4 * rrd_gfx.c graphics wrapper for rrdtool
5 **************************************************************************/
7 /* #define DEBUG */
9 /* stupid MSVC doesnt support variadic macros = no debug for now! */
10 #ifdef _MSC_VER
11 # define RRDPRINTF()
12 #else
13 # ifdef DEBUG
14 # define RRDPRINTF(...) fprintf(stderr, __VA_ARGS__);
15 # else
16 # define RRDPRINTF(...)
17 # endif /* DEBUG */
18 #endif /* _MSC_VER */
19 #include "rrd_tool.h"
20 #include <png.h>
21 #include <ft2build.h>
22 #include FT_FREETYPE_H
23 #include FT_GLYPH_H
25 #include "rrd_gfx.h"
26 #include "rrd_afm.h"
27 #include "unused.h"
29 /* lines are better drawn on the pixle than between pixles */
30 #define LINEOFFSET 0.5
32 #define USE_PDF_FAKE_ALPHA 1
33 #define USE_EPS_FAKE_ALPHA 1
35 typedef struct gfx_char_s *gfx_char;
36 struct gfx_char_s {
37 FT_UInt index; /* glyph index */
38 FT_Vector pos; /* location from baseline in 26.6 */
39 FT_Glyph image; /* glyph bitmap */
40 };
42 typedef struct gfx_string_s *gfx_string;
43 struct gfx_string_s {
44 unsigned int width;
45 unsigned int height;
46 int count; /* number of characters */
47 gfx_char glyphs;
48 size_t num_glyphs;
49 FT_BBox bbox;
50 FT_Matrix transform;
51 };
53 /* compute string bbox */
54 static void compute_string_bbox(gfx_string string);
56 /* create a freetype glyph string */
57 gfx_string gfx_string_create ( gfx_canvas_t *canvas, FT_Face face,
58 const char *text, int rotation, double tabwidth, double size);
60 /* create a freetype glyph string */
61 static void gfx_string_destroy ( gfx_string string );
63 static
64 gfx_node_t *gfx_new_node( gfx_canvas_t *canvas,enum gfx_en type){
65 gfx_node_t *node = art_new(gfx_node_t,1);
66 if (node == NULL) return NULL;
67 node->type = type;
68 node->color = 0x0; /* color of element 0xRRGGBBAA alpha 0xff is solid*/
69 node->size =0.0; /* font size, line width */
70 node->path = NULL; /* path */
71 node->points = 0;
72 node->points_max =0;
73 node->closed_path = 0;
74 node->filename = NULL; /* font or image filename */
75 node->text = NULL;
76 node->x = 0.0;
77 node->y = 0.0; /* position */
78 node->angle = 0;
79 node->halign = GFX_H_NULL; /* text alignement */
80 node->valign = GFX_V_NULL; /* text alignement */
81 node->tabwidth = 0.0;
82 node->next = NULL;
83 if (canvas->lastnode != NULL){
84 canvas->lastnode->next = node;
85 }
86 if (canvas->firstnode == NULL){
87 canvas->firstnode = node;
88 }
89 canvas->lastnode = node;
90 return node;
91 }
93 gfx_canvas_t *gfx_new_canvas (void) {
94 gfx_canvas_t *canvas = art_new(gfx_canvas_t,1);
95 canvas->firstnode = NULL;
96 canvas->lastnode = NULL;
97 canvas->imgformat = IF_PNG; /* we default to PNG output */
98 canvas->interlaced = 0;
99 canvas->zoom = 1.0;
100 canvas->font_aa_threshold = -1.0;
101 canvas->aa_type = AA_NORMAL;
102 return canvas;
103 }
105 /* create a new line */
106 gfx_node_t *gfx_new_line(gfx_canvas_t *canvas,
107 double X0, double Y0,
108 double X1, double Y1,
109 double width, gfx_color_t color){
110 return gfx_new_dashed_line(canvas, X0, Y0, X1, Y1, width, color, 0, 0);
111 }
113 gfx_node_t *gfx_new_dashed_line(gfx_canvas_t *canvas,
114 double X0, double Y0,
115 double X1, double Y1,
116 double width, gfx_color_t color,
117 double dash_on, double dash_off){
119 gfx_node_t *node;
120 ArtVpath *vec;
121 node = gfx_new_node(canvas,GFX_LINE);
122 if (node == NULL) return NULL;
123 vec = art_new(ArtVpath, 3);
124 if (vec == NULL) return NULL;
125 vec[0].code = ART_MOVETO_OPEN; vec[0].x=X0+LINEOFFSET; vec[0].y=Y0+LINEOFFSET;
126 vec[1].code = ART_LINETO; vec[1].x=X1+LINEOFFSET; vec[1].y=Y1+LINEOFFSET;
127 vec[2].code = ART_END; vec[2].x=0;vec[2].y=0;
129 node->points = 3;
130 node->points_max = 3;
131 node->color = color;
132 node->size = width;
133 node->dash_on = dash_on;
134 node->dash_off = dash_off;
135 node->path = vec;
136 return node;
137 }
139 /* create a new area */
140 gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,
141 double X0, double Y0,
142 double X1, double Y1,
143 double X2, double Y2,
144 gfx_color_t color) {
146 gfx_node_t *node;
147 ArtVpath *vec;
148 node = gfx_new_node(canvas,GFX_AREA);
149 if (node == NULL) return NULL;
150 vec = art_new(ArtVpath, 5);
151 if (vec == NULL) return NULL;
152 vec[0].code = ART_MOVETO; vec[0].x=X0; vec[0].y=Y0;
153 vec[1].code = ART_LINETO; vec[1].x=X1; vec[1].y=Y1;
154 vec[2].code = ART_LINETO; vec[2].x=X2; vec[2].y=Y2;
155 vec[3].code = ART_LINETO; vec[3].x=X0; vec[3].y=Y0;
156 vec[4].code = ART_END; vec[4].x=0; vec[4].y=0;
158 node->points = 5;
159 node->points_max = 5;
160 node->color = color;
161 node->path = vec;
163 return node;
164 }
166 /* add a point to a line or to an area */
167 int gfx_add_point (gfx_node_t *node,
168 double x, double y){
169 if (node == NULL) return 1;
170 if (node->type == GFX_AREA) {
171 double X0 = node->path[0].x;
172 double Y0 = node->path[0].y;
173 node->points -= 2;
174 art_vpath_add_point (&(node->path),
175 &(node->points),
176 &(node->points_max),
177 ART_LINETO,
178 x,y);
179 art_vpath_add_point (&(node->path),
180 &(node->points),
181 &(node->points_max),
182 ART_LINETO,
183 X0,Y0);
184 art_vpath_add_point (&(node->path),
185 &(node->points),
186 &(node->points_max),
187 ART_END,
188 0,0);
189 } else if (node->type == GFX_LINE) {
190 node->points -= 1;
191 art_vpath_add_point (&(node->path),
192 &(node->points),
193 &(node->points_max),
194 ART_LINETO,
195 x+LINEOFFSET,y+LINEOFFSET);
196 art_vpath_add_point (&(node->path),
197 &(node->points),
198 &(node->points_max),
199 ART_END,
200 0,0);
202 } else {
203 /* can only add point to areas and lines */
204 return 1;
205 }
206 return 0;
207 }
209 void gfx_close_path (gfx_node_t *node) {
210 node->closed_path = 1;
211 if (node->path[0].code == ART_MOVETO_OPEN)
212 node->path[0].code = ART_MOVETO;
213 }
215 /* create a text node */
216 gfx_node_t *gfx_new_text (gfx_canvas_t *canvas,
217 double x, double y, gfx_color_t color,
218 char* font, double size,
219 double tabwidth, double angle,
220 enum gfx_h_align_en h_align,
221 enum gfx_v_align_en v_align,
222 char* text){
223 gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT);
225 node->text = strdup(text);
226 node->size = size;
227 node->filename = strdup(font);
228 node->x = x;
229 node->y = y;
230 node->angle = angle;
231 node->color = color;
232 node->tabwidth = tabwidth;
233 node->halign = h_align;
234 node->valign = v_align;
235 #if 0
236 /* debugging: show text anchor
237 green is along x-axis, red is downward y-axis */
238 if (1) {
239 double a = 2 * M_PI * -node->angle / 360.0;
240 double cos_a = cos(a);
241 double sin_a = sin(a);
242 double len = 3;
243 gfx_new_line(canvas,
244 x, y,
245 x + len * cos_a, y - len * sin_a,
246 0.2, 0x00FF0000);
247 gfx_new_line(canvas,
248 x, y,
249 x + len * sin_a, y + len * cos_a,
250 0.2, 0xFF000000);
251 }
252 #endif
253 return node;
254 }
256 int gfx_render(gfx_canvas_t *canvas,
257 art_u32 width, art_u32 height,
258 gfx_color_t background, FILE *fp){
259 switch (canvas->imgformat) {
260 case IF_PNG:
261 return gfx_render_png (canvas, width, height, background, fp);
262 case IF_SVG:
263 return gfx_render_svg (canvas, width, height, background, fp);
264 case IF_EPS:
265 return gfx_render_eps (canvas, width, height, background, fp);
266 case IF_PDF:
267 return gfx_render_pdf (canvas, width, height, background, fp);
268 default:
269 return -1;
270 }
271 }
273 static void gfx_string_destroy ( gfx_string string ) {
274 unsigned int n;
275 if (string->glyphs) {
276 for (n=0; n<string->num_glyphs; ++n)
277 FT_Done_Glyph (string->glyphs[n].image);
278 free (string->glyphs);
279 }
280 free (string);
281 }
284 double gfx_get_text_width ( gfx_canvas_t *canvas,
285 double start, char* font, double size,
286 double tabwidth, char* text, int rotation){
287 switch (canvas->imgformat) {
288 case IF_PNG:
289 return gfx_get_text_width_libart (canvas, start, font, size, tabwidth, text, rotation);
290 case IF_SVG: /* fall through */
291 case IF_EPS:
292 case IF_PDF:
293 return afm_get_text_width(start, font, size, tabwidth, text);
294 default:
295 return size * strlen(text);
296 }
297 }
299 double gfx_get_text_width_libart (
300 gfx_canvas_t *canvas, double UNUSED(start), char* font, double size,
301 double tabwidth, char* text, int rotation ){
303 int error;
304 double text_width=0;
305 FT_Face face;
306 FT_Library library=NULL;
307 gfx_string string;
309 FT_Init_FreeType( &library );
310 error = FT_New_Face( library, font, 0, &face );
311 if ( error ) {
312 FT_Done_FreeType(library);
313 return -1;
314 }
315 error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
316 if ( error ) {
317 FT_Done_FreeType(library);
318 return -1;
319 }
320 string = gfx_string_create( canvas, face, text, rotation, tabwidth, size );
321 text_width = string->width;
322 gfx_string_destroy(string);
323 FT_Done_FreeType(library);
324 return text_width/64;
325 }
327 static void gfx_libart_close_path(gfx_node_t *node, ArtVpath **vec)
328 {
329 /* libart must have end==start for closed paths,
330 even if using ART_MOVETO and not ART_MOVETO_OPEN
331 so add extra point which is the same as the starting point */
332 int points_max = node->points; /* scaled array has exact size */
333 int points = node->points - 1;
334 art_vpath_add_point (vec, &points, &points_max, ART_LINETO,
335 (**vec).x, (**vec).y);
336 art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
337 }
340 /* find bbox of a string */
341 static void compute_string_bbox(gfx_string string) {
342 unsigned int n;
343 FT_BBox bbox;
345 bbox.xMin = bbox.yMin = 32000;
346 bbox.xMax = bbox.yMax = -32000;
347 for ( n = 0; n < string->num_glyphs; n++ ) {
348 FT_BBox glyph_bbox;
349 FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
350 &glyph_bbox );
351 if (glyph_bbox.xMin < bbox.xMin) {
352 bbox.xMin = glyph_bbox.xMin;
353 }
354 if (glyph_bbox.yMin < bbox.yMin) {
355 bbox.yMin = glyph_bbox.yMin;
356 }
357 if (glyph_bbox.xMax > bbox.xMax) {
358 bbox.xMax = glyph_bbox.xMax;
359 }
360 if (glyph_bbox.yMax > bbox.yMax) {
361 bbox.yMax = glyph_bbox.yMax;
362 }
363 }
364 if ( bbox.xMin > bbox.xMax ) {
365 bbox.xMin = 0;
366 bbox.yMin = 0;
367 bbox.xMax = 0;
368 bbox.yMax = 0;
369 }
370 string->bbox.xMin = bbox.xMin;
371 string->bbox.xMax = bbox.xMax;
372 string->bbox.yMin = bbox.yMin;
373 string->bbox.yMax = bbox.yMax;
374 }
376 /* create a free type glyph string */
377 gfx_string gfx_string_create(gfx_canvas_t *canvas, FT_Face face,const char *text,
378 int rotation, double tabwidth, double size )
379 {
381 FT_GlyphSlot slot = face->glyph; /* a small shortcut */
382 FT_Bool use_kerning;
383 FT_UInt previous;
384 FT_Vector ft_pen;
386 gfx_string string = (gfx_string) malloc (sizeof(struct gfx_string_s));
388 gfx_char glyph; /* current glyph in table */
389 int n;
390 int error;
391 int gottab = 0;
393 #ifdef HAVE_MBSTOWCS
394 wchar_t *cstr;
395 size_t clen = strlen(text)+1;
396 cstr = malloc(sizeof(wchar_t) * clen); /* yes we are allocating probably too much here, I know */
397 string->count=mbstowcs(cstr,text,clen);
398 if ( string->count == -1){
399 /* conversion did not work, so lets fall back to just use what we got */
400 string->count=clen-1;
401 for(n=0;text[n] != '\0';n++){
402 cstr[n]=(unsigned char)text[n];
403 }
404 }
405 #else
406 char *cstr = strdup(text);
407 string->count = strlen (text);
408 #endif
410 ft_pen.x = 0; /* start at (0,0) !! */
411 ft_pen.y = 0;
414 string->width = 0;
415 string->height = 0;
416 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
417 string->num_glyphs = 0;
418 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
419 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
420 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
421 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
423 use_kerning = FT_HAS_KERNING(face);
424 previous = 0;
425 glyph = string->glyphs;
426 for (n=0; n<string->count;glyph++,n++) {
427 FT_Vector vec;
428 /* handle the tabs ...
429 have a witespace glyph inserted, but set its width such that the distance
430 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
431 unsigned int letter = cstr[n];
432 letter = afm_fix_osx_charset(letter); /* unsafe macro */
434 gottab = 0;
435 if (letter == '\\' && n+1 < string->count && cstr[n+1] == 't'){
436 /* we have a tab here so skip the backslash and
437 set t to ' ' so that we get a white space */
438 gottab = 1;
439 n++;
440 letter = ' ';
441 }
442 if (letter == '\t'){
443 letter = ' ';
444 gottab = 1 ;
445 }
446 /* initialize each struct gfx_char_s */
447 glyph->index = 0;
448 glyph->pos.x = 0;
449 glyph->pos.y = 0;
450 glyph->image = NULL;
451 glyph->index = FT_Get_Char_Index( face, letter );
453 /* compute glyph origin */
454 if ( use_kerning && previous && glyph->index ) {
455 FT_Vector kerning;
456 FT_Get_Kerning (face, previous, glyph->index,
457 ft_kerning_default, &kerning);
458 ft_pen.x += kerning.x;
459 ft_pen.y += kerning.y;
460 }
462 /* load the glyph image (in its native format) */
463 /* for now, we take a monochrome glyph bitmap */
464 error = FT_Load_Glyph (face, glyph->index, size > canvas->font_aa_threshold ?
465 canvas->aa_type == AA_NORMAL ? FT_LOAD_TARGET_NORMAL :
466 canvas->aa_type == AA_LIGHT ? FT_LOAD_TARGET_LIGHT :
467 FT_LOAD_TARGET_MONO : FT_LOAD_TARGET_MONO);
468 if (error) {
469 RRDPRINTF("couldn't load glyph: %c\n", letter)
470 continue;
471 }
472 error = FT_Get_Glyph (slot, &glyph->image);
473 if (error) {
474 RRDPRINTF("couldn't get glyph %c from slot %d\n", letter, (int)slot)
475 continue;
476 }
477 /* if we are in tabbing mode, we replace the tab with a space and shift the position
478 of the space so that its left edge is where the tab was supposed to land us */
479 if (gottab){
480 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
481 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
482 }
483 /* store current pen position */
484 glyph->pos.x = ft_pen.x;
485 glyph->pos.y = ft_pen.y;
488 ft_pen.x += slot->advance.x;
489 ft_pen.y += slot->advance.y;
491 /* rotate glyph */
492 vec = glyph->pos;
493 FT_Vector_Transform (&vec, &string->transform);
494 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
495 if (error) {
496 RRDPRINTF("couldn't transform glyph id %d\n", letter)
497 continue;
498 }
500 /* convert to a bitmap - destroy native image */
501 error = FT_Glyph_To_Bitmap (&glyph->image, size > canvas->font_aa_threshold ?
502 canvas->aa_type == AA_NORMAL ? FT_RENDER_MODE_NORMAL :
503 canvas->aa_type == AA_LIGHT ? FT_RENDER_MODE_LIGHT :
504 FT_RENDER_MODE_MONO : FT_RENDER_MODE_MONO, 0, 1);
505 if (error) {
506 RRDPRINTF("couldn't convert glyph id %d to bitmap\n", letter)
507 continue;
508 }
510 /* increment number of glyphs */
511 previous = glyph->index;
512 string->num_glyphs++;
513 }
514 free(cstr);
515 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
516 compute_string_bbox( string );
517 /* the last character was a tab */
518 /* if (gottab) { */
519 string->width = ft_pen.x;
520 /* } else {
521 string->width = string->bbox.xMax - string->bbox.xMin;
522 } */
523 string->height = string->bbox.yMax - string->bbox.yMin;
524 return string;
525 }
528 static int gfx_save_png (art_u8 *buffer, FILE *fp,
529 long width, long height, long bytes_per_pixel);
530 /* render grafics into png image */
532 int gfx_render_png (gfx_canvas_t *canvas,
533 art_u32 width, art_u32 height,
534 gfx_color_t background, FILE *fp){
537 FT_Library library;
538 gfx_node_t *node = canvas->firstnode;
539 /*
540 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
541 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
542 */
543 unsigned long pys_width = width * canvas->zoom;
544 unsigned long pys_height = height * canvas->zoom;
545 const int bytes_per_pixel = 4;
546 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
548 /* fill that buffer with out background color */
549 gfx_color_t *buffp = art_new (gfx_color_t, pys_width*pys_height);
550 art_u8 *buffer = (art_u8 *)buffp;
551 unsigned long i;
552 for (i=0;i<pys_width*pys_height;
553 i++){
554 *(buffp++)=background;
555 }
556 FT_Init_FreeType( &library );
557 while(node){
558 switch (node->type) {
559 case GFX_LINE:
560 case GFX_AREA: {
561 ArtVpath *vec;
562 double dst[6];
563 ArtSVP *svp;
564 art_affine_scale(dst,canvas->zoom,canvas->zoom);
565 vec = art_vpath_affine_transform(node->path,dst);
566 if (node->closed_path)
567 gfx_libart_close_path(node, &vec);
568 /* gfx_round_scaled_coordinates(vec); */
569 /* pvec = art_vpath_perturb(vec);
570 art_free(vec); */
571 if(node->type == GFX_LINE){
572 svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
573 ART_PATH_STROKE_CAP_ROUND,
574 node->size*canvas->zoom,4,0.25);
575 } else {
576 svp = art_svp_from_vpath ( vec );
577 /* this takes time and is unnecessary since we make
578 sure elsewhere that the areas are going clock-whise */
579 /* svpt = art_svp_uncross( svp );
580 art_svp_free(svp);
581 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
582 art_svp_free(svpt);
583 */
584 }
585 art_free(vec);
586 /* this is from gnome since libart does not have this yet */
587 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
588 node->color, buffer, rowstride, NULL);
589 art_svp_free(svp);
590 break;
591 }
592 case GFX_TEXT: {
593 unsigned int n;
594 int error;
595 art_u8 fcolor[4],falpha;
596 FT_Face face;
597 gfx_char glyph;
598 gfx_string string;
599 FT_Vector vec; /* 26.6 */
601 float pen_x = 0.0 , pen_y = 0.0;
602 /* double x,y; */
603 long ix,iy;
605 fcolor[0] = node->color >> 24;
606 fcolor[1] = (node->color >> 16) & 0xff;
607 fcolor[2] = (node->color >> 8) & 0xff;
608 falpha = node->color & 0xff;
609 error = FT_New_Face( library,
610 (char *)node->filename,
611 0,
612 &face );
613 if ( error ) {
614 rrd_set_error("failed to load %s",node->filename);
616 break;
617 }
618 error = FT_Set_Char_Size(face, /* handle to face object */
619 (long)(node->size*64),
620 (long)(node->size*64),
621 (long)(100*canvas->zoom),
622 (long)(100*canvas->zoom));
623 if ( error ) {
624 FT_Done_Face(face);
625 break;
626 }
627 pen_x = node->x * canvas->zoom;
628 pen_y = node->y * canvas->zoom;
630 string = gfx_string_create (canvas, face, node->text, node->angle, node->tabwidth, node->size);
631 FT_Done_Face(face);
633 switch(node->halign){
634 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
635 break;
636 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
637 -string->bbox.xMax/2:-string->bbox.xMin/2;
638 break;
639 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
640 break;
641 case GFX_H_NULL: vec.x = 0;
642 break;
643 }
645 switch(node->valign){
646 case GFX_V_TOP: vec.y = string->bbox.yMax;
647 break;
648 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
649 string->bbox.yMax/2:string->bbox.yMin/2;
650 break;
651 case GFX_V_BOTTOM: vec.y = 0;
652 break;
653 case GFX_V_NULL: vec.y = 0;
654 break;
655 }
656 pen_x += vec.x/64;
657 pen_y += vec.y/64;
658 glyph = string->glyphs;
659 for(n=0; n<string->num_glyphs; n++, glyph++) {
660 int gr;
661 FT_Glyph image;
662 FT_BitmapGlyph bit;
663 /* long buf_x,comp_n; */
664 /* make copy to transform */
665 if (! glyph->image) {
666 RRDPRINTF("no image\n")
667 continue;
668 }
669 error = FT_Glyph_Copy (glyph->image, &image);
670 if (error) {
671 RRDPRINTF("couldn't copy image\n")
672 continue;
673 }
675 /* transform it */
676 vec = glyph->pos;
677 FT_Vector_Transform (&vec, &string->transform);
679 bit = (FT_BitmapGlyph) image;
680 gr = bit->bitmap.num_grays -1;
681 /*
682 buf_x = (pen_x + 0.5) + (double)bit->left;
683 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
684 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
685 buf_x *= bytes_per_pixel ;
686 for (iy=0; iy < bit->bitmap.rows; iy++){
687 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
688 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
689 buf_y *= rowstride;
690 for (ix=0;ix < bit->bitmap.width;ix++){
691 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
692 }
693 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
694 }
695 art_free(letter);
696 */
697 switch ( bit->bitmap.pixel_mode ) {
698 case FT_PIXEL_MODE_GRAY:
699 for (iy=0; iy < bit->bitmap.rows; iy++){
700 long buf_y = iy+(pen_y+0.5)-bit->top;
701 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
702 buf_y *= rowstride;
703 for (ix=0;ix < bit->bitmap.width;ix++){
704 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
705 art_u8 font_alpha;
707 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
708 buf_x *= bytes_per_pixel ;
709 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix);
710 if (font_alpha > 0){
711 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
712 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
713 }
714 }
715 }
716 break;
718 case FT_PIXEL_MODE_MONO:
719 for (iy=0; iy < bit->bitmap.rows; iy++){
720 long buf_y = iy+(pen_y+0.5)-bit->top;
721 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
722 buf_y *= rowstride;
723 for (ix=0;ix < bit->bitmap.width;ix++){
724 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
726 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
727 buf_x *= bytes_per_pixel ;
728 if ( (fcolor[3] = falpha * ((*(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix/8) >> (7 - (ix % 8))) & 1)) > 0 )
729 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
730 }
731 }
732 break;
734 default:
735 rrd_set_error("unknown freetype pixel mode: %d", bit->bitmap.pixel_mode);
736 break;
737 }
739 /*
740 for (iy=0; iy < bit->bitmap.rows; iy++){
741 long buf_y = iy+(pen_y+0.5)-bit->top;
742 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
743 buf_y *= rowstride;
744 for (ix=0;ix < bit->bitmap.width;ix++){
745 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
746 art_u8 font_alpha;
748 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
749 buf_x *= bytes_per_pixel ;
750 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
751 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
752 for (iz = 0; iz < 3; iz++){
753 art_u8 *orig = buffer + buf_y + buf_x + iz;
754 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
755 (double)fcolor[iz] / gr * (font_alpha));
756 }
757 }
758 }
759 */
760 FT_Done_Glyph (image);
761 }
762 gfx_string_destroy(string);
763 }
764 }
765 node = node->next;
766 }
767 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
768 art_free(buffer);
769 FT_Done_FreeType( library );
770 return 0;
771 }
773 /* free memory used by nodes this will also remove memory required for
774 associated paths and svcs ... but not for text strings */
775 int
776 gfx_destroy (gfx_canvas_t *canvas){
777 gfx_node_t *next,*node = canvas->firstnode;
778 while(node){
779 next = node->next;
780 art_free(node->path);
781 free(node->text);
782 free(node->filename);
783 art_free(node);
784 node = next;
785 }
786 art_free(canvas);
787 return 0;
788 }
790 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
791 png_structp png_ptr = NULL;
792 png_infop info_ptr = NULL;
793 int i;
794 png_bytep *row_pointers;
795 int rowstride = width * bytes_per_pixel;
796 png_text text[2];
798 if (fp == NULL)
799 return (1);
801 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
802 if (png_ptr == NULL)
803 {
804 return (1);
805 }
806 row_pointers = (png_bytepp)png_malloc(png_ptr,
807 height*sizeof(png_bytep));
809 info_ptr = png_create_info_struct(png_ptr);
811 if (info_ptr == NULL)
812 {
813 png_free(png_ptr,row_pointers);
814 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
815 return (1);
816 }
818 if (setjmp(png_jmpbuf(png_ptr)))
819 {
820 /* If we get here, we had a problem writing the file */
821 png_destroy_write_struct(&png_ptr, &info_ptr);
822 return (1);
823 }
825 png_init_io(png_ptr, fp);
826 png_set_IHDR (png_ptr, info_ptr,width, height,
827 8, PNG_COLOR_TYPE_RGB_ALPHA,
828 PNG_INTERLACE_NONE,
829 PNG_COMPRESSION_TYPE_DEFAULT,
830 PNG_FILTER_TYPE_DEFAULT);
832 text[0].key = "Software";
833 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetiker.ch>, http://tobi.oetiker.ch";
834 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
835 png_set_text (png_ptr, info_ptr, text, 1);
837 /* lets make this fast while ending up with some increass in image size */
838 png_set_filter(png_ptr,0,PNG_FILTER_NONE);
839 /* png_set_filter(png_ptr,0,PNG_FILTER_SUB); */
840 png_set_compression_level(png_ptr,1);
841 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
842 /*
843 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
844 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
845 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
847 /* Write header data */
848 png_write_info (png_ptr, info_ptr);
849 for (i = 0; i < height; i++)
850 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
852 png_write_image(png_ptr, row_pointers);
853 png_write_end(png_ptr, info_ptr);
854 png_free(png_ptr,row_pointers);
855 png_destroy_write_struct(&png_ptr, &info_ptr);
856 return 1;
857 }
860 /* ----- COMMON ROUTINES for pdf, svg and eps */
861 #define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
862 #define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
864 #define PDF_CALC_DEBUG 0
866 typedef struct pdf_point
867 {
868 double x, y;
869 } pdf_point;
871 typedef struct
872 {
873 double ascender, descender, baselineY;
874 pdf_point sizep, minp, maxp;
875 double x, y, tdx, tdy;
876 double r, cos_r, sin_r;
877 double ma, mb, mc, md, mx, my; /* pdf coord matrix */
878 double tmx, tmy; /* last 2 coords of text coord matrix */
879 #if PDF_CALC_DEBUG
880 int debug;
881 #endif
882 } pdf_coords;
884 #if PDF_CALC_DEBUG
885 static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
886 {
887 fprintf(stderr, "PDF CALC =============================\n");
888 fprintf(stderr, " '%s' at %f pt\n", node->text, node->size);
889 fprintf(stderr, " align h = %s, v = %s, sizep = %f, %f\n",
890 (node->halign == GFX_H_RIGHT ? "r" :
891 (node->halign == GFX_H_CENTER ? "c" :
892 (node->halign == GFX_H_LEFT ? "l" : "N"))),
893 (node->valign == GFX_V_TOP ? "t" :
894 (node->valign == GFX_V_CENTER ? "c" :
895 (node->valign == GFX_V_BOTTOM ? "b" : "N"))),
896 g->sizep.x, g->sizep.y);
897 fprintf(stderr, " r = %f = %f, cos = %f, sin = %f\n",
898 g->r, node->angle, g->cos_r, g->sin_r);
899 fprintf(stderr, " ascender = %f, descender = %f, baselineY = %f\n",
900 g->ascender, g->descender, g->baselineY);
901 fprintf(stderr, " sizep: %f, %f\n", g->sizep.x, g->sizep.y);
902 fprintf(stderr, " minp: %f, %f maxp = %f, %f\n",
903 g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
904 fprintf(stderr, " x = %f, y = %f\n", g->x, g->y);
905 fprintf(stderr, " tdx = %f, tdy = %f\n", g->tdx, g->tdy);
906 fprintf(stderr, " GM = %f, %f, %f, %f, %f, %f\n",
907 g->ma, g->mb, g->mc, g->md, g->mx, g->my);
908 fprintf(stderr, " TM = %f, %f, %f, %f, %f, %f\n",
909 g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
910 }
911 #endif
913 #if PDF_CALC_DEBUG
914 #define PDF_DD(x) if (g->debug) x;
915 #else
916 #define PDF_DD(x)
917 #endif
919 static void pdf_rotate(pdf_coords *g, pdf_point *p)
920 {
921 double x2 = g->cos_r * p->x - g->sin_r * p->y;
922 double y2 = g->sin_r * p->x + g->cos_r * p->y;
923 PDF_DD( fprintf(stderr, " rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
924 p->x = x2;
925 p->y = y2;
926 }
929 static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
930 {
931 pdf_point a, b, c;
932 #if PDF_CALC_DEBUG
933 /* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
934 g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
935 #endif
936 g->x = node->x;
937 g->y = page_height - node->y;
938 if (node->angle) {
939 g->r = 2 * M_PI * node->angle / 360.0;
940 g->cos_r = cos(g->r);
941 g->sin_r = sin(g->r);
942 } else {
943 g->r = 0;
944 g->cos_r = 1;
945 g->sin_r = 0;
946 }
947 g->ascender = afm_get_ascender(node->filename, node->size);
948 g->descender = afm_get_descender(node->filename, node->size);
949 g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
950 /* seems like libart ignores the descender when doing vertial-align = bottom,
951 so we do that too, to get labels v-aligning properly */
952 g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
953 g->baselineY = -g->ascender - g->sizep.y / 2;
954 a.x = g->sizep.x; a.y = g->sizep.y;
955 b.x = g->sizep.x; b.y = 0;
956 c.x = 0; c.y = g->sizep.y;
957 if (node->angle) {
958 pdf_rotate(g, &a);
959 pdf_rotate(g, &b);
960 pdf_rotate(g, &c);
961 }
962 g->minp.x = min3(a.x, b.x, c.x);
963 g->minp.y = min3(a.y, b.y, c.y);
964 g->maxp.x = max3(a.x, b.x, c.x);
965 g->maxp.y = max3(a.y, b.y, c.y);
966 /* The alignment parameters in node->valign and node->halign
967 specifies the alignment in the non-rotated coordinate system
968 (very unlike pdf/postscript), which complicates matters.
969 */
970 switch (node->halign) {
971 case GFX_H_RIGHT: g->tdx = -g->maxp.x; break;
972 case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
973 case GFX_H_LEFT: g->tdx = -g->minp.x; break;
974 case GFX_H_NULL: g->tdx = 0; break;
975 }
976 switch(node->valign){
977 case GFX_V_TOP: g->tdy = -g->maxp.y; break;
978 case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
979 case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
980 case GFX_V_NULL: g->tdy = 0; break;
981 }
982 g->ma = g->cos_r;
983 g->mb = g->sin_r;
984 g->mc = -g->sin_r;
985 g->md = g->cos_r;
986 g->mx = g->x + g->tdx;
987 g->my = g->y + g->tdy;
988 g->tmx = g->mx - g->ascender * g->mc;
989 g->tmy = g->my - g->ascender * g->md;
990 PDF_DD(pdf_dump_calc(node, g))
991 }
993 /* ------- SVG -------
994 SVG reference:
995 http://www.w3.org/TR/SVG/
996 */
997 static int svg_indent = 0;
998 static int svg_single_line = 0;
999 static const char *svg_default_font = "-dummy-";
1000 typedef struct svg_dash
1001 {
1002 int dash_enable;
1003 double dash_adjust, dash_len, dash_offset;
1004 double adjusted_on, adjusted_off;
1005 } svg_dash;
1008 static void svg_print_indent(FILE *fp)
1009 {
1010 int i;
1011 for (i = svg_indent - svg_single_line; i > 0; i--) {
1012 putc(' ', fp);
1013 putc(' ', fp);
1014 }
1015 }
1017 static void svg_start_tag(FILE *fp, const char *name)
1018 {
1019 svg_print_indent(fp);
1020 putc('<', fp);
1021 fputs(name, fp);
1022 svg_indent++;
1023 }
1025 static void svg_close_tag_single_line(FILE *fp)
1026 {
1027 svg_single_line++;
1028 putc('>', fp);
1029 }
1031 static void svg_close_tag(FILE *fp)
1032 {
1033 putc('>', fp);
1034 if (!svg_single_line)
1035 putc('\n', fp);
1036 }
1038 static void svg_end_tag(FILE *fp, const char *name)
1039 {
1040 /* name is NULL if closing empty-node tag */
1041 svg_indent--;
1042 if (svg_single_line)
1043 svg_single_line--;
1044 else if (name)
1045 svg_print_indent(fp);
1046 if (name != NULL) {
1047 fputs("</", fp);
1048 fputs(name, fp);
1049 } else {
1050 putc('/', fp);
1051 }
1052 svg_close_tag(fp);
1053 }
1055 static void svg_close_tag_empty_node(FILE *fp)
1056 {
1057 svg_end_tag(fp, NULL);
1058 }
1060 static void svg_write_text(FILE *fp, const char *text)
1061 {
1062 #ifdef HAVE_MBSTOWCS
1063 size_t clen;
1064 wchar_t *p, *cstr, ch;
1065 int text_count;
1066 if (!text)
1067 return;
1068 clen = strlen(text) + 1;
1069 cstr = malloc(sizeof(wchar_t) * clen);
1070 text_count = mbstowcs(cstr, text, clen);
1071 if (text_count == -1)
1072 text_count = mbstowcs(cstr, "Enc-Err", 6);
1073 p = cstr;
1074 #else
1075 unsigned char *p = text;
1076 unsigned char *cstr;
1077 char ch;
1078 if (!p)
1079 return;
1080 #endif
1081 while (1) {
1082 ch = *p++;
1083 ch = afm_fix_osx_charset(ch); /* unsafe macro */
1084 switch (ch) {
1085 case 0:
1086 #ifdef HAVE_MBSTOWCS
1087 free(cstr);
1088 #endif
1089 return;
1090 case '&': fputs("&", fp); break;
1091 case '<': fputs("<", fp); break;
1092 case '>': fputs(">", fp); break;
1093 case '"': fputs(""", fp); break;
1094 default:
1095 if (ch == 32) {
1096 #ifdef HAVE_MBSTOWCS
1097 if (p <= cstr + 1 || !*p || *p == 32)
1098 fputs(" ", fp); /* non-breaking space in unicode */
1099 else
1100 #endif
1101 fputc(32, fp);
1102 } else if (ch < 32 || ch >= 127)
1103 fprintf(fp, "&#%d;", (int)ch);
1104 else
1105 putc((char)ch, fp);
1106 }
1107 }
1108 }
1110 static void svg_format_number(char *buf, int bufsize, double d)
1111 {
1112 /* omit decimals if integer to reduce filesize */
1113 char *p;
1114 snprintf(buf, bufsize, "%.2f", d);
1115 p = buf; /* doesn't trust snprintf return value */
1116 while (*p)
1117 p++;
1118 while (--p > buf) {
1119 char ch = *p;
1120 if (ch == '0') {
1121 *p = '\0'; /* zap trailing zeros */
1122 continue;
1123 }
1124 if (ch == '.')
1125 *p = '\0'; /* zap trailing dot */
1126 break;
1127 }
1128 }
1130 static void svg_write_number(FILE *fp, double d)
1131 {
1132 char buf[60];
1133 svg_format_number(buf, sizeof(buf), d);
1134 fputs(buf, fp);
1135 }
1137 static int svg_color_is_black(int c)
1138 {
1139 /* gfx_color_t is RRGGBBAA */
1140 return c == 0x000000FF;
1141 }
1143 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
1144 {
1145 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
1146 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
1147 gfx_color_t opacity = c & 0xFF;
1148 fprintf(fp, " %s=\"", attr);
1149 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
1150 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
1151 fprintf(fp, "#%03lX",
1152 ( ((rrggbb >> 8) & 0xF00)
1153 | ((rrggbb >> 4) & 0x0F0)
1154 | ( rrggbb & 0x00F)));
1155 } else {
1156 fprintf(fp, "#%06lX", rrggbb);
1157 }
1158 fputs("\"", fp);
1159 if (opacity != 0xFF) {
1160 fprintf(fp, " opacity=\"");
1161 svg_write_number(fp, opacity / 255.0);
1162 fputs("\"", fp);
1163 }
1164 }
1166 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
1167 {
1168 double offset;
1169 int mult;
1170 if (node->dash_on <= 0 || node->dash_off <= 0) {
1171 d->dash_enable = 0;
1172 return;
1173 }
1174 d->dash_enable = 1;
1175 d->dash_len = node->dash_on + node->dash_off;
1176 /* dash on/off adjustment due to round caps */
1177 d->dash_adjust = 0.8 * node->size;
1178 d->adjusted_on = node->dash_on - d->dash_adjust;
1179 if (d->adjusted_on < 0.01)
1180 d->adjusted_on = 0.01;
1181 d->adjusted_off = d->dash_len - d->adjusted_on;
1182 /* dash offset calc */
1183 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
1184 offset = node->path[0].y;
1185 else
1186 offset = node->path[0].x;
1187 mult = (int)fabs(offset / d->dash_len);
1188 d->dash_offset = offset - mult * d->dash_len;
1189 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
1190 d->dash_offset = d->dash_len - d->dash_offset;
1191 }
1193 static int svg_dash_equal(svg_dash *a, svg_dash *b)
1194 {
1195 if (a->dash_enable != b->dash_enable)
1196 return 0;
1197 if (a->adjusted_on != b->adjusted_on)
1198 return 0;
1199 if (a->adjusted_off != b->adjusted_off)
1200 return 0;
1201 /* rest of properties will be the same when on+off are */
1202 return 1;
1203 }
1205 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
1206 {
1207 svg_dash dash_info;
1208 svg_get_dash(node, &dash_info);
1209 fputs(" stroke-width=\"", fp);
1210 svg_write_number(fp, node->size);
1211 fputs("\"", fp);
1212 svg_write_color(fp, node->color, "stroke");
1213 fputs(" fill=\"none\"", fp);
1214 if (dash_info.dash_enable) {
1215 if (dash_info.dash_offset != 0) {
1216 fputs(" stroke-dashoffset=\"", fp);
1217 svg_write_number(fp, dash_info.dash_offset);
1218 fputs("\"", fp);
1219 }
1220 fputs(" stroke-dasharray=\"", fp);
1221 svg_write_number(fp, dash_info.adjusted_on);
1222 fputs(",", fp);
1223 svg_write_number(fp, dash_info.adjusted_off);
1224 fputs("\"", fp);
1225 }
1226 }
1228 static int svg_is_int_step(double a, double b)
1229 {
1230 double diff = fabs(a - b);
1231 return floor(diff) == diff;
1232 }
1234 static int svg_path_straight_segment(FILE *fp,
1235 double lastA, double currentA, double currentB,
1236 gfx_node_t *node,
1237 int segment_idx, int isx, char absChar, char relChar)
1238 {
1239 if (!svg_is_int_step(lastA, currentA)) {
1240 putc(absChar, fp);
1241 svg_write_number(fp, currentA);
1242 return 0;
1243 }
1244 if (segment_idx < node->points - 1) {
1245 ArtVpath *vec = node->path + segment_idx + 1;
1246 if (vec->code == ART_LINETO) {
1247 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1248 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1249 if (nextB == currentB
1250 && ((currentA >= lastA) == (nextA >= currentA))
1251 && svg_is_int_step(currentA, nextA)) {
1252 return 1; /* skip to next as it is a straight line */
1253 }
1254 }
1255 }
1256 putc(relChar, fp);
1257 svg_write_number(fp, currentA - lastA);
1258 return 0;
1259 }
1261 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1262 {
1263 int i;
1264 double lastX = 0, lastY = 0;
1265 /* for straight lines <path..> tags take less space than
1266 <line..> tags because of the efficient packing
1267 in the 'd' attribute */
1268 svg_start_tag(fp, "path");
1269 if (!multi)
1270 svg_common_path_attributes(fp, node);
1271 fputs(" d=\"", fp);
1272 /* specification of the 'd' attribute: */
1273 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1274 for (i = 0; i < node->points; i++) {
1275 ArtVpath *vec = node->path + i;
1276 double x = vec->x - LINEOFFSET;
1277 double y = vec->y - LINEOFFSET;
1278 switch (vec->code) {
1279 case ART_MOVETO_OPEN: /* fall-through */
1280 case ART_MOVETO:
1281 putc('M', fp);
1282 svg_write_number(fp, x);
1283 putc(',', fp);
1284 svg_write_number(fp, y);
1285 break;
1286 case ART_LINETO:
1287 /* try optimize filesize by using minimal lineto commands */
1288 /* without introducing rounding errors. */
1289 if (x == lastX) {
1290 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1291 continue;
1292 } else if (y == lastY) {
1293 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1294 continue;
1295 } else {
1296 putc('L', fp);
1297 svg_write_number(fp, x);
1298 putc(',', fp);
1299 svg_write_number(fp, y);
1300 }
1301 break;
1302 case ART_CURVETO: break; /* unsupported */
1303 case ART_END: break; /* nop */
1304 }
1305 lastX = x;
1306 lastY = y;
1307 }
1308 if (node->closed_path)
1309 fputs(" Z", fp);
1310 fputs("\"", fp);
1311 svg_close_tag_empty_node(fp);
1312 }
1314 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1315 {
1316 /* optimize for multiple paths with the same color, penwidth, etc. */
1317 int num = 1;
1318 gfx_node_t *node = *nodeR;
1319 gfx_node_t *next = node->next;
1320 while (next) {
1321 if (next->type != node->type
1322 || next->size != node->size
1323 || next->color != node->color
1324 || next->dash_on != node->dash_on
1325 || next->dash_off != node->dash_off)
1326 break;
1327 next = next->next;
1328 num++;
1329 }
1330 if (num == 1) {
1331 svg_path(fp, node, 0);
1332 return;
1333 }
1334 svg_start_tag(fp, "g");
1335 svg_common_path_attributes(fp, node);
1336 svg_close_tag(fp);
1337 while (num && node) {
1338 svg_path(fp, node, 1);
1339 if (!--num)
1340 break;
1341 node = node->next;
1342 *nodeR = node;
1343 }
1344 svg_end_tag(fp, "g");
1345 }
1347 static void svg_area(FILE *fp, gfx_node_t *node)
1348 {
1349 int i;
1350 double startX = 0, startY = 0;
1351 svg_start_tag(fp, "polygon");
1352 fputs(" ", fp);
1353 svg_write_color(fp, node->color, "fill");
1354 fputs(" points=\"", fp);
1355 for (i = 0; i < node->points; i++) {
1356 ArtVpath *vec = node->path + i;
1357 double x = vec->x - LINEOFFSET;
1358 double y = vec->y - LINEOFFSET;
1359 switch (vec->code) {
1360 case ART_MOVETO_OPEN: /* fall-through */
1361 case ART_MOVETO:
1362 svg_write_number(fp, x);
1363 putc(',', fp);
1364 svg_write_number(fp, y);
1365 startX = x;
1366 startY = y;
1367 break;
1368 case ART_LINETO:
1369 if (i == node->points - 2
1370 && node->path[i + 1].code == ART_END
1371 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1372 break; /* poly area always closed, no need for last point */
1373 }
1374 putc(' ', fp);
1375 svg_write_number(fp, x);
1376 putc(',', fp);
1377 svg_write_number(fp, y);
1378 break;
1379 case ART_CURVETO: break; /* unsupported */
1380 case ART_END: break; /* nop */
1381 }
1382 }
1383 fputs("\"", fp);
1384 svg_close_tag_empty_node(fp);
1385 }
1387 static void svg_text(FILE *fp, gfx_node_t *node)
1388 {
1389 pdf_coords g;
1390 const char *fontname;
1391 /* as svg has 0,0 in top-left corner (like most screens) instead of
1392 bottom-left corner like pdf and eps, we have to fake the coords
1393 using offset and inverse sin(r) value */
1394 int page_height = 1000;
1395 pdf_calc(page_height, node, &g);
1396 if (node->angle != 0) {
1397 svg_start_tag(fp, "g");
1398 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1399 skewed text */
1400 fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
1401 g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
1402 svg_close_tag(fp);
1403 }
1404 svg_start_tag(fp, "text");
1405 if (!node->angle) {
1406 fputs(" x=\"", fp);
1407 svg_write_number(fp, g.tmx);
1408 fputs("\" y=\"", fp);
1409 svg_write_number(fp, page_height - g.tmy);
1410 fputs("\"", fp);
1411 }
1412 fontname = afm_get_font_name(node->filename);
1413 if (strcmp(fontname, svg_default_font))
1414 fprintf(fp, " font-family=\"%s\"", fontname);
1415 fputs(" font-size=\"", fp);
1416 svg_write_number(fp, node->size);
1417 fputs("\"", fp);
1418 if (!svg_color_is_black(node->color))
1419 svg_write_color(fp, node->color, "fill");
1420 svg_close_tag_single_line(fp);
1421 /* support for node->tabwidth missing */
1422 svg_write_text(fp, node->text);
1423 svg_end_tag(fp, "text");
1424 if (node->angle != 0)
1425 svg_end_tag(fp, "g");
1426 }
1428 int gfx_render_svg (gfx_canvas_t *canvas,
1429 art_u32 width, art_u32 height,
1430 gfx_color_t background, FILE *fp){
1431 gfx_node_t *node = canvas->firstnode;
1432 /* Find the first font used, and assume it is the mostly used
1433 one. It reduces the number of font-familty attributes. */
1434 while (node) {
1435 if (node->type == GFX_TEXT && node->filename) {
1436 svg_default_font = afm_get_font_name(node->filename);
1437 break;
1438 }
1439 node = node->next;
1440 }
1441 fputs(
1442 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1443 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1444 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1445 "<!--\n"
1446 " SVG file created by\n"
1447 " RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1448 "\n"
1449 " The width/height attributes in the outhermost svg node\n"
1450 " are just default sizes for the browser which is used\n"
1451 " if the svg file is openened directly without being\n"
1452 " embedded in an html file.\n"
1453 " The viewBox is the local coord system for rrdtool.\n"
1454 "-->\n", fp);
1455 svg_start_tag(fp, "svg");
1456 fputs(" width=\"", fp);
1457 svg_write_number(fp, width * canvas->zoom);
1458 fputs("\" height=\"", fp);
1459 svg_write_number(fp, height * canvas->zoom);
1460 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1461 svg_write_number(fp, -LINEOFFSET);
1462 fputs(" ", fp);
1463 svg_write_number(fp, -LINEOFFSET);
1464 fputs(" ", fp);
1465 svg_write_number(fp, width - LINEOFFSET);
1466 fputs(" ", fp);
1467 svg_write_number(fp, height - LINEOFFSET);
1468 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1469 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1470 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1471 fputs(" xmlns=\"http://www.w3.org/2000/svg\"", fp);
1472 fputs(" xmlns:xlink=\"http://www.w3.org/1999/xlink\"", fp);
1473 svg_close_tag(fp);
1474 svg_start_tag(fp, "rect");
1475 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1476 svg_write_color(fp, background, "fill");
1477 svg_close_tag_empty_node(fp);
1478 node = canvas->firstnode;
1479 while (node) {
1480 switch (node->type) {
1481 case GFX_LINE:
1482 svg_multi_path(fp, &node);
1483 break;
1484 case GFX_AREA:
1485 svg_area(fp, node);
1486 break;
1487 case GFX_TEXT:
1488 svg_text(fp, node);
1489 }
1490 node = node->next;
1491 }
1492 svg_end_tag(fp, "svg");
1493 return 0;
1494 }
1496 /* ------- EPS -------
1497 EPS and Postscript references:
1498 http://partners.adobe.com/asn/developer/technotes/postscript.html
1499 */
1501 typedef struct eps_font
1502 {
1503 const char *ps_font;
1504 int id;
1505 struct eps_font *next;
1506 } eps_font;
1508 typedef struct eps_state
1509 {
1510 FILE *fp;
1511 gfx_canvas_t *canvas;
1512 art_u32 page_width, page_height;
1513 eps_font *font_list;
1514 /*--*/
1515 gfx_color_t color;
1516 const char *font;
1517 double font_size;
1518 double line_width;
1519 int linecap, linejoin;
1520 int has_dash;
1521 } eps_state;
1523 static void eps_set_color(eps_state *state, gfx_color_t color)
1524 {
1525 #if USE_EPS_FAKE_ALPHA
1526 double a1, a2;
1527 #endif
1528 /* gfx_color_t is RRGGBBAA */
1529 if (state->color == color)
1530 return;
1531 #if USE_EPS_FAKE_ALPHA
1532 a1 = (color & 255) / 255.0;
1533 a2 = 255 * (1 - a1);
1534 #define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
1535 #else
1536 #define eps_color_calc(x) (int)( (x) & 255)
1537 #endif
1538 /* gfx_color_t is RRGGBBAA */
1539 if (state->color == color)
1540 return;
1541 fprintf(state->fp, "%d %d %d Rgb\n",
1542 eps_color_calc(color >> 24),
1543 eps_color_calc(color >> 16),
1544 eps_color_calc(color >> 8));
1545 state->color = color;
1546 }
1548 static int eps_add_font(eps_state *state, gfx_node_t *node)
1549 {
1550 /* The fonts list could be postponed to the end using
1551 (atend), but let's be nice and have them in the header. */
1552 const char *ps_font = afm_get_font_postscript_name(node->filename);
1553 eps_font *ef;
1554 for (ef = state->font_list; ef; ef = ef->next) {
1555 if (!strcmp(ps_font, ef->ps_font))
1556 return 0;
1557 }
1558 ef = malloc(sizeof(eps_font));
1559 if (ef == NULL) {
1560 rrd_set_error("malloc for eps_font");
1561 return -1;
1562 }
1563 ef->next = state->font_list;
1564 ef->ps_font = ps_font;
1565 state->font_list = ef;
1566 return 0;
1567 }
1569 static void eps_list_fonts(eps_state *state, const char *dscName)
1570 {
1571 eps_font *ef;
1572 int lineLen = strlen(dscName);
1573 if (!state->font_list)
1574 return;
1575 fputs(dscName, state->fp);
1576 for (ef = state->font_list; ef; ef = ef->next) {
1577 int nameLen = strlen(ef->ps_font);
1578 if (lineLen + nameLen > 100 && lineLen) {
1579 fputs("\n", state->fp);
1580 fputs("%%- \n", state->fp);
1581 lineLen = 5;
1582 } else {
1583 fputs(" ", state->fp);
1584 lineLen++;
1585 }
1586 fputs(ef->ps_font, state->fp);
1587 lineLen += nameLen;
1588 }
1589 fputs("\n", state->fp);
1590 }
1592 static void eps_define_fonts(eps_state *state)
1593 {
1594 eps_font *ef;
1595 if (!state->font_list)
1596 return;
1597 for (ef = state->font_list; ef; ef = ef->next) {
1598 /* PostScript¨ LANGUAGE REFERENCE third edition
1599 page 349 */
1600 fprintf(state->fp,
1601 "%%\n"
1602 "/%s findfont dup length dict begin\n"
1603 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1604 "/Encoding ISOLatin1Encoding def\n"
1605 "currentdict end\n"
1606 "/%s-ISOLatin1 exch definefont pop\n"
1607 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1608 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1609 }
1610 }
1612 static int eps_prologue(eps_state *state)
1613 {
1614 gfx_node_t *node;
1615 fputs(
1616 "%!PS-Adobe-3.0 EPSF-3.0\n"
1617 "%%Creator: RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1618 /* can't like weird chars here */
1619 "%%Title: (RRDtool output)\n"
1620 "%%DocumentData: Clean7Bit\n"
1621 "", state->fp);
1622 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1623 state->page_width, state->page_height);
1624 for (node = state->canvas->firstnode; node; node = node->next) {
1625 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1626 return -1;
1627 }
1628 eps_list_fonts(state, "%%DocumentFonts:");
1629 eps_list_fonts(state, "%%DocumentNeededFonts:");
1630 fputs(
1631 "%%EndComments\n"
1632 "%%BeginProlog\n"
1633 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1634 "/bd { bind def } bind def\n"
1635 "", state->fp);
1636 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1637 fputs(
1638 "/X2 {X exch X exch} bd\n"
1639 "/M {X2 moveto} bd\n"
1640 "/L {X2 lineto} bd\n"
1641 "/m {moveto} bd\n"
1642 "/l {lineto} bd\n"
1643 "/S {stroke} bd\n"
1644 "/CP {closepath} bd\n"
1645 "/WS {setlinewidth stroke} bd\n"
1646 "/F {fill} bd\n"
1647 "/T1 {gsave} bd\n"
1648 "/T2 {concat 0 0 moveto show grestore} bd\n"
1649 "/T {moveto show} bd\n"
1650 "/Rgb { 255.0 div 3 1 roll\n"
1651 " 255.0 div 3 1 roll \n"
1652 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1653 "", state->fp);
1654 eps_define_fonts(state);
1655 return 0;
1656 }
1658 static void eps_clear_dash(eps_state *state)
1659 {
1660 if (!state->has_dash)
1661 return;
1662 state->has_dash = 0;
1663 fputs("[1 0] 0 setdash\n", state->fp);
1664 }
1666 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1667 {
1668 int i;
1669 FILE *fp = state->fp;
1670 int useOffset = 0;
1671 int clearDashIfAny = 1;
1672 eps_set_color(state, node->color);
1673 if (node->type == GFX_LINE) {
1674 svg_dash dash_info;
1675 if (state->linecap != 1) {
1676 fputs("1 setlinecap\n", fp);
1677 state->linecap = 1;
1678 }
1679 if (state->linejoin != 1) {
1680 fputs("1 setlinejoin\n", fp);
1681 state->linejoin = 1;
1682 }
1683 svg_get_dash(node, &dash_info);
1684 if (dash_info.dash_enable) {
1685 clearDashIfAny = 0;
1686 state->has_dash = 1;
1687 fputs("[", fp);
1688 svg_write_number(fp, dash_info.adjusted_on);
1689 fputs(" ", fp);
1690 svg_write_number(fp, dash_info.adjusted_off);
1691 fputs("] ", fp);
1692 svg_write_number(fp, dash_info.dash_offset);
1693 fputs(" setdash\n", fp);
1694 }
1695 }
1696 if (clearDashIfAny)
1697 eps_clear_dash(state);
1698 for (i = 0; i < node->points; i++) {
1699 ArtVpath *vec = node->path + i;
1700 double x = vec->x;
1701 double y = state->page_height - vec->y;
1702 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1703 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1704 if (useOffset) {
1705 x -= LINEOFFSET;
1706 y -= LINEOFFSET;
1707 }
1708 switch (vec->code) {
1709 case ART_MOVETO_OPEN: /* fall-through */
1710 case ART_MOVETO:
1711 svg_write_number(fp, x);
1712 fputc(' ', fp);
1713 svg_write_number(fp, y);
1714 fputc(' ', fp);
1715 fputs(useOffset ? "M\n" : "m\n", fp);
1716 break;
1717 case ART_LINETO:
1718 svg_write_number(fp, x);
1719 fputc(' ', fp);
1720 svg_write_number(fp, y);
1721 fputc(' ', fp);
1722 fputs(useOffset ? "L\n" : "l\n", fp);
1723 break;
1724 case ART_CURVETO: break; /* unsupported */
1725 case ART_END: break; /* nop */
1726 }
1727 }
1728 if (node->type == GFX_LINE) {
1729 if (node->closed_path)
1730 fputs("CP ", fp);
1731 if (node->size != state->line_width) {
1732 state->line_width = node->size;
1733 svg_write_number(fp, state->line_width);
1734 fputs(" WS\n", fp);
1735 } else {
1736 fputs("S\n", fp);
1737 }
1738 } else {
1739 fputs("F\n", fp);
1740 }
1741 }
1743 static void eps_write_text(eps_state *state, gfx_node_t *node)
1744 {
1745 FILE *fp = state->fp;
1746 const char *ps_font = afm_get_font_postscript_name(node->filename);
1747 int lineLen = 0;
1748 pdf_coords g;
1749 #ifdef HAVE_MBSTOWCS
1750 size_t clen;
1751 wchar_t *p, *cstr, ch;
1752 int text_count;
1753 if (!node->text)
1754 return;
1755 clen = strlen(node->text) + 1;
1756 cstr = malloc(sizeof(wchar_t) * clen);
1757 text_count = mbstowcs(cstr, node->text, clen);
1758 if (text_count == -1)
1759 text_count = mbstowcs(cstr, "Enc-Err", 6);
1760 p = cstr;
1761 #else
1762 const unsigned char *p = node->text;
1763 unsigned char ch;
1764 if (!p)
1765 return;
1766 #endif
1767 pdf_calc(state->page_height, node, &g);
1768 eps_set_color(state, node->color);
1769 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1770 state->font = ps_font;
1771 state->font_size = node->size;
1772 svg_write_number(fp, state->font_size);
1773 fprintf(fp, " SetFont-%s\n", state->font);
1774 }
1775 if (node->angle)
1776 fputs("T1 ", fp);
1777 fputs("(", fp);
1778 lineLen = 20;
1779 while (1) {
1780 ch = *p;
1781 if (!ch)
1782 break;
1783 ch = afm_fix_osx_charset(ch); /* unsafe macro */
1784 if (++lineLen > 70) {
1785 fputs("\\\n", fp); /* backslash and \n */
1786 lineLen = 0;
1787 }
1788 switch (ch) {
1789 case '%':
1790 case '(':
1791 case ')':
1792 case '\\':
1793 fputc('\\', fp);
1794 fputc(ch, fp);
1795 break;
1796 case '\n':
1797 fputs("\\n", fp);
1798 break;
1799 case '\r':
1800 fputs("\\r", fp);
1801 break;
1802 case '\t':
1803 fputs("\\t", fp);
1804 break;
1805 default:
1806 if (ch > 255) {
1807 fputc('?', fp);
1808 } else if (ch >= 126 || ch < 32) {
1809 fprintf(fp, "\\%03o", (unsigned int)ch);
1810 lineLen += 3;
1811 } else {
1812 fputc(ch, fp);
1813 }
1814 }
1815 p++;
1816 }
1817 #ifdef HAVE_MBSTOWCS
1818 free(cstr);
1819 #endif
1820 if (node->angle) {
1821 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1822 skewed text */
1823 fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
1824 g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
1825 } else {
1826 fputs(") ", fp);
1827 svg_write_number(fp, g.tmx);
1828 fputs(" ", fp);
1829 svg_write_number(fp, g.tmy);
1830 fputs(" T\n", fp);
1831 }
1832 }
1834 static int eps_write_content(eps_state *state)
1835 {
1836 gfx_node_t *node;
1837 fputs("%\n", state->fp);
1838 for (node = state->canvas->firstnode; node; node = node->next) {
1839 switch (node->type) {
1840 case GFX_LINE:
1841 case GFX_AREA:
1842 eps_write_linearea(state, node);
1843 break;
1844 case GFX_TEXT:
1845 eps_write_text(state, node);
1846 break;
1847 }
1848 }
1849 return 0;
1850 }
1852 int gfx_render_eps (gfx_canvas_t *canvas,
1853 art_u32 width, art_u32 height,
1854 gfx_color_t background, FILE *fp){
1855 struct eps_state state;
1856 state.fp = fp;
1857 state.canvas = canvas;
1858 state.page_width = width;
1859 state.page_height = height;
1860 state.font = "no-default-font";
1861 state.font_size = -1;
1862 state.color = 0; /* black */
1863 state.font_list = NULL;
1864 state.linecap = -1;
1865 state.linejoin = -1;
1866 state.has_dash = 0;
1867 state.line_width = 1;
1868 if (eps_prologue(&state) == -1)
1869 return -1;
1870 eps_set_color(&state, background);
1871 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1872 height, width, height, width);
1873 if (eps_write_content(&state) == -1)
1874 return 0;
1875 fputs("showpage\n", fp);
1876 fputs("%%EOF\n", fp);
1877 while (state.font_list) {
1878 eps_font *next = state.font_list->next;
1879 free(state.font_list);
1880 state.font_list = next;
1881 }
1882 return 0;
1883 }
1885 /* ------- PDF -------
1886 PDF references page:
1887 http://partners.adobe.com/public/developer/pdf/index_reference.html
1888 */
1890 typedef struct pdf_buffer
1891 {
1892 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1893 char *data;
1894 int alloc_size, current_size;
1895 struct pdf_buffer *previous_buffer, *next_buffer;
1896 struct pdf_state *state;
1897 } pdf_buffer;
1899 typedef struct pdf_font
1900 {
1901 const char *ps_font;
1902 pdf_buffer obj;
1903 struct pdf_font *next;
1904 } pdf_font;
1906 typedef struct pdf_state
1907 {
1908 FILE *fp;
1909 gfx_canvas_t *canvas;
1910 art_u32 page_width, page_height;
1911 pdf_font *font_list;
1912 pdf_buffer *first_buffer, *last_buffer;
1913 int pdf_file_pos;
1914 int has_failed;
1915 /*--*/
1916 gfx_color_t stroke_color, fill_color;
1917 int font_id;
1918 double font_size;
1919 double line_width;
1920 svg_dash dash;
1921 int linecap, linejoin;
1922 int last_obj_id;
1923 /*--*/
1924 pdf_buffer pdf_header;
1925 pdf_buffer info_obj, catalog_obj, pages_obj, page1_obj;
1926 pdf_buffer fontsdict_obj;
1927 pdf_buffer graph_stream;
1928 } pdf_state;
1930 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1931 {
1932 int initial_size = 32;
1933 buf->state = state;
1934 buf->id = -42;
1935 buf->alloc_size = 0;
1936 buf->current_size = 0;
1937 buf->data = (char*)malloc(initial_size);
1938 buf->is_obj = 0;
1939 buf->previous_buffer = NULL;
1940 buf->next_buffer = NULL;
1941 if (buf->data == NULL) {
1942 rrd_set_error("malloc for pdf_buffer data");
1943 state->has_failed = 1;
1944 return;
1945 }
1946 buf->alloc_size = initial_size;
1947 if (state->last_buffer)
1948 state->last_buffer->next_buffer = buf;
1949 if (state->first_buffer == NULL)
1950 state->first_buffer = buf;
1951 buf->previous_buffer = state->last_buffer;
1952 state->last_buffer = buf;
1953 }
1955 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1956 {
1957 if (len <= 0)
1958 return;
1959 if (buf->alloc_size < buf->current_size + len) {
1960 int new_size = buf->alloc_size;
1961 char *new_buf;
1962 while (new_size < buf->current_size + len)
1963 new_size *= 4;
1964 new_buf = (char*)malloc(new_size);
1965 if (new_buf == NULL) {
1966 rrd_set_error("re-malloc for pdf_buffer data");
1967 buf->state->has_failed = 1;
1968 return;
1969 }
1970 memcpy(new_buf, buf->data, buf->current_size);
1971 free(buf->data);
1972 buf->data = new_buf;
1973 buf->alloc_size = new_size;
1974 }
1975 memcpy(buf->data + buf->current_size, text, len);
1976 buf->current_size += len;
1977 }
1979 static void pdf_put_char(pdf_buffer *buf, char c)
1980 {
1981 if (buf->alloc_size >= buf->current_size + 1) {
1982 buf->data[buf->current_size++] = c;
1983 } else {
1984 char tmp[1];
1985 tmp[0] = (char)c;
1986 pdf_put(buf, tmp, 1);
1987 }
1988 }
1990 static void pdf_puts(pdf_buffer *buf, const char *text)
1991 {
1992 pdf_put(buf, text, strlen(text));
1993 }
1995 static void pdf_indent(pdf_buffer *buf)
1996 {
1997 pdf_puts(buf, "\t");
1998 }
2000 static void pdf_putsi(pdf_buffer *buf, const char *text)
2001 {
2002 pdf_indent(buf);
2003 pdf_puts(buf, text);
2004 }
2006 static void pdf_putint(pdf_buffer *buf, int i)
2007 {
2008 char tmp[20];
2009 sprintf(tmp, "%d", i);
2010 pdf_puts(buf, tmp);
2011 }
2013 static void pdf_putnumber(pdf_buffer *buf, double d)
2014 {
2015 char tmp[50];
2016 svg_format_number(tmp, sizeof(tmp), d);
2017 pdf_puts(buf, tmp);
2018 }
2020 static void pdf_put_string_contents_wide(pdf_buffer *buf, const afm_char *text)
2021 {
2022 const afm_char *p = text;
2023 while (1) {
2024 afm_char ch = *p;
2025 ch = afm_fix_osx_charset(ch); /* unsafe macro */
2026 switch (ch) {
2027 case 0:
2028 return;
2029 case '(':
2030 pdf_puts(buf, "\\(");
2031 break;
2032 case ')':
2033 pdf_puts(buf, "\\)");
2034 break;
2035 case '\\':
2036 pdf_puts(buf, "\\\\");
2037 break;
2038 case '\n':
2039 pdf_puts(buf, "\\n");
2040 break;
2041 case '\r':
2042 pdf_puts(buf, "\\r");
2043 break;
2044 case '\t':
2045 pdf_puts(buf, "\\t");
2046 break;
2047 default:
2048 if (ch > 255) {
2049 pdf_put_char(buf, '?');
2050 } else if (ch > 125 || ch < 32) {
2051 pdf_put_char(buf, ch);
2052 } else {
2053 char tmp[10];
2054 snprintf(tmp, sizeof(tmp), "\\%03o", (int)ch);
2055 pdf_puts(buf, tmp);
2056 }
2057 }
2058 p++;
2059 }
2060 }
2062 static void pdf_put_string_contents(pdf_buffer *buf, const char *text)
2063 {
2064 #ifdef HAVE_MBSTOWCS
2065 size_t clen = strlen(text) + 1;
2066 wchar_t *cstr = malloc(sizeof(wchar_t) * clen);
2067 int text_count = mbstowcs(cstr, text, clen);
2068 if (text_count == -1)
2069 text_count = mbstowcs(cstr, "Enc-Err", 6);
2070 pdf_put_string_contents_wide(buf, cstr);
2071 #if 0
2072 if (*text == 'W') {
2073 fprintf(stderr, "Decoding utf8 for '%s'\n", text);
2074 wchar_t *p = cstr;
2075 char *pp = text;
2076 fprintf(stderr, "sz wc = %d\n", sizeof(wchar_t));
2077 while (*p) {
2078 fprintf(stderr, " %d = %c versus %d = %c\n", *p, (char)*p, 255 & (int)*pp, *pp);
2079 p++;
2080 pp++;
2081 }
2082 }
2083 #endif
2084 free(cstr);
2085 #else
2086 pdf_put_string_contents_wide(buf, text);
2087 #endif
2088 }
2090 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
2091 {
2092 pdf_init_buffer(state, buf);
2093 buf->id = ++state->last_obj_id;
2094 buf->is_obj = 1;
2095 buf->is_stream = 0;
2096 }
2098 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
2099 {
2100 pdf_init_object(state, buf);
2101 buf->is_dict = 1;
2102 }
2104 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
2105 gfx_color_t *current_color, const char *op)
2106 {
2107 #if USE_PDF_FAKE_ALPHA
2108 double a1, a2;
2109 #endif
2110 /* gfx_color_t is RRGGBBAA */
2111 if (*current_color == color)
2112 return;
2113 #if USE_PDF_FAKE_ALPHA
2114 a1 = (color & 255) / 255.0;
2115 a2 = 1 - a1;
2116 #define pdf_color_calc(x) ( ((x) & 255) / 255.0 * a1 + a2)
2117 #else
2118 #define pdf_color_calc(x) ( ((x) & 255) / 255.0)
2119 #endif
2120 pdf_putnumber(buf, pdf_color_calc(color >> 24));
2121 pdf_puts(buf, " ");
2122 pdf_putnumber(buf, pdf_color_calc(color >> 16));
2123 pdf_puts(buf, " ");
2124 pdf_putnumber(buf, pdf_color_calc(color >> 8));
2125 pdf_puts(buf, " ");
2126 pdf_puts(buf, op);
2127 pdf_puts(buf, "\n");
2128 *current_color = color;
2129 }
2131 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
2132 {
2133 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
2134 }
2136 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
2137 {
2138 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
2139 }
2141 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
2142 {
2143 const char *ps_font = afm_get_font_postscript_name(node->filename);
2144 pdf_font *ef;
2145 for (ef = state->font_list; ef; ef = ef->next) {
2146 if (!strcmp(ps_font, ef->ps_font))
2147 return ef;
2148 }
2149 return NULL;
2150 }
2152 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
2153 {
2154 pdf_font *ef = pdf_find_font(state, node);
2155 if (ef)
2156 return;
2157 ef = malloc(sizeof(pdf_font));
2158 if (ef == NULL) {
2159 rrd_set_error("malloc for pdf_font");
2160 state->has_failed = 1;
2161 return;
2162 }
2163 pdf_init_dict(state, &ef->obj);
2164 ef->next = state->font_list;
2165 ef->ps_font = afm_get_font_postscript_name(node->filename);
2166 state->font_list = ef;
2167 /* fonts dict */
2168 pdf_putsi(&state->fontsdict_obj, "/F");
2169 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2170 pdf_puts(&state->fontsdict_obj, " ");
2171 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2172 pdf_puts(&state->fontsdict_obj, " 0 R\n");
2173 /* fonts def */
2174 pdf_putsi(&ef->obj, "/Type /Font\n");
2175 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
2176 pdf_putsi(&ef->obj, "/Name /F");
2177 pdf_putint(&ef->obj, ef->obj.id);
2178 pdf_puts(&ef->obj, "\n");
2179 pdf_putsi(&ef->obj, "/BaseFont /");
2180 pdf_puts(&ef->obj, ef->ps_font);
2181 pdf_puts(&ef->obj, "\n");
2182 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
2183 /* 'Cp1252' (this is latin 1 extended with 27 characters;
2184 the encoding is also known as 'winansi')
2185 http://www.lowagie.com/iText/tutorial/ch09.html */
2186 }
2188 static void pdf_create_fonts(pdf_state *state)
2189 {
2190 gfx_node_t *node;
2191 for (node = state->canvas->firstnode; node; node = node->next) {
2192 if (node->type == GFX_TEXT)
2193 pdf_add_font(state, node);
2194 }
2195 }
2197 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
2198 {
2199 int i;
2200 pdf_buffer *s = &state->graph_stream;
2201 if (node->type == GFX_LINE) {
2202 svg_dash dash_info;
2203 svg_get_dash(node, &dash_info);
2204 if (!svg_dash_equal(&dash_info, &state->dash)) {
2205 state->dash = dash_info;
2206 if (dash_info.dash_enable) {
2207 pdf_puts(s, "[");
2208 pdf_putnumber(s, dash_info.adjusted_on);
2209 pdf_puts(s, " ");
2210 pdf_putnumber(s, dash_info.adjusted_off);
2211 pdf_puts(s, "] ");
2212 pdf_putnumber(s, dash_info.dash_offset);
2213 pdf_puts(s, " d\n");
2214 } else {
2215 pdf_puts(s, "[] 0 d\n");
2216 }
2217 }
2218 pdf_set_stroke_color(s, node->color);
2219 if (state->linecap != 1) {
2220 pdf_puts(s, "1 j\n");
2221 state->linecap = 1;
2222 }
2223 if (state->linejoin != 1) {
2224 pdf_puts(s, "1 J\n");
2225 state->linejoin = 1;
2226 }
2227 if (node->size != state->line_width) {
2228 state->line_width = node->size;
2229 pdf_putnumber(s, state->line_width);
2230 pdf_puts(s, " w\n");
2231 }
2232 } else {
2233 pdf_set_fill_color(s, node->color);
2234 }
2235 for (i = 0; i < node->points; i++) {
2236 ArtVpath *vec = node->path + i;
2237 double x = vec->x;
2238 double y = state->page_height - vec->y;
2239 if (node->type == GFX_AREA) {
2240 x += LINEOFFSET; /* adjust for libart handling of areas */
2241 y -= LINEOFFSET;
2242 }
2243 switch (vec->code) {
2244 case ART_MOVETO_OPEN: /* fall-through */
2245 case ART_MOVETO:
2246 pdf_putnumber(s, x);
2247 pdf_puts(s, " ");
2248 pdf_putnumber(s, y);
2249 pdf_puts(s, " m\n");
2250 break;
2251 case ART_LINETO:
2252 pdf_putnumber(s, x);
2253 pdf_puts(s, " ");
2254 pdf_putnumber(s, y);
2255 pdf_puts(s, " l\n");
2256 break;
2257 case ART_CURVETO: break; /* unsupported */
2258 case ART_END: break; /* nop */
2259 }
2260 }
2261 if (node->type == GFX_LINE) {
2262 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
2263 } else {
2264 pdf_puts(s, "f\n");
2265 }
2266 }
2269 static void pdf_write_matrix(pdf_state *state, gfx_node_t *node, pdf_coords *g, int useTM)
2270 {
2271 char tmp[150];
2272 pdf_buffer *s = &state->graph_stream;
2273 if (node->angle == 0) {
2274 pdf_puts(s, "1 0 0 1 ");
2275 pdf_putnumber(s, useTM ? g->tmx : g->mx);
2276 pdf_puts(s, " ");
2277 pdf_putnumber(s, useTM ? g->tmy : g->my);
2278 } else {
2279 /* can't use svg_write_number as 2 decimals is far from enough to avoid
2280 skewed text */
2281 sprintf(tmp, "%f %f %f %f %f %f",
2282 g->ma, g->mb, g->mc, g->md,
2283 useTM ? g->tmx : g->mx,
2284 useTM ? g->tmy : g->my);
2285 pdf_puts(s, tmp);
2286 }
2287 }
2289 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
2290 int last_was_text, int next_is_text)
2291 {
2292 pdf_coords g;
2293 pdf_buffer *s = &state->graph_stream;
2294 pdf_font *font = pdf_find_font(state, node);
2295 if (font == NULL) {
2296 rrd_set_error("font disappeared");
2297 state->has_failed = 1;
2298 return;
2299 }
2300 pdf_calc(state->page_height, node, &g);
2301 #if PDF_CALC_DEBUG
2302 pdf_puts(s, "q % debug green box\n");
2303 pdf_write_matrix(state, node, &g, 0);
2304 pdf_puts(s, " cm\n");
2305 pdf_set_fill_color(s, 0x90FF9000);
2306 pdf_puts(s, "0 0.4 0 rg\n");
2307 pdf_puts(s, "0 0 ");
2308 pdf_putnumber(s, g.sizep.x);
2309 pdf_puts(s, " ");
2310 pdf_putnumber(s, g.sizep.y);
2311 pdf_puts(s, " re\n");
2312 pdf_puts(s, "f\n");
2313 pdf_puts(s, "Q\n");
2314 #endif
2315 pdf_set_fill_color(s, node->color);
2316 if (PDF_CALC_DEBUG || !last_was_text)
2317 pdf_puts(s, "BT\n");
2318 if (state->font_id != font->obj.id || node->size != state->font_size) {
2319 state->font_id = font->obj.id;
2320 state->font_size = node->size;
2321 pdf_puts(s, "/F");
2322 pdf_putint(s, font->obj.id);
2323 pdf_puts(s, " ");
2324 pdf_putnumber(s, node->size);
2325 pdf_puts(s, " Tf\n");
2326 }
2327 pdf_write_matrix(state, node, &g, 1);
2328 pdf_puts(s, " Tm\n");
2329 pdf_puts(s, "(");
2330 pdf_put_string_contents(s, node->text);
2331 pdf_puts(s, ") Tj\n");
2332 if (PDF_CALC_DEBUG || !next_is_text)
2333 pdf_puts(s, "ET\n");
2334 }
2336 static void pdf_write_content(pdf_state *state)
2337 {
2338 gfx_node_t *node;
2339 int last_was_text = 0, next_is_text;
2340 for (node = state->canvas->firstnode; node; node = node->next) {
2341 switch (node->type) {
2342 case GFX_LINE:
2343 case GFX_AREA:
2344 pdf_write_linearea(state, node);
2345 break;
2346 case GFX_TEXT:
2347 next_is_text = node->next && node->next->type == GFX_TEXT;
2348 pdf_write_text(state, node, last_was_text, next_is_text);
2349 break;
2350 }
2351 last_was_text = node->type == GFX_TEXT;
2352 }
2353 }
2355 static void pdf_init_document(pdf_state *state)
2356 {
2357 pdf_init_buffer(state, &state->pdf_header);
2358 pdf_init_dict(state, &state->catalog_obj);
2359 pdf_init_dict(state, &state->info_obj);
2360 pdf_init_dict(state, &state->pages_obj);
2361 pdf_init_dict(state, &state->page1_obj);
2362 pdf_init_dict(state, &state->fontsdict_obj);
2363 pdf_create_fonts(state);
2364 if (state->has_failed)
2365 return;
2366 /* make stream last object in file */
2367 pdf_init_object(state, &state->graph_stream);
2368 state->graph_stream.is_stream = 1;
2369 }
2371 static void pdf_setup_document(pdf_state *state)
2372 {
2373 const char *creator = "RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch";
2374 /* all objects created by now, so init code can reference them */
2375 /* HEADER */
2376 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2377 /* following 8 bit comment is recommended by Adobe for
2378 indicating binary file to file transfer applications */
2379 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2380 /* INFO */
2381 pdf_putsi(&state->info_obj, "/Creator (");
2382 pdf_put_string_contents(&state->info_obj, creator);
2383 pdf_puts(&state->info_obj, ")\n");
2384 /* CATALOG */
2385 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2386 pdf_putsi(&state->catalog_obj, "/Pages ");
2387 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2388 pdf_puts(&state->catalog_obj, " 0 R\n");
2389 /* PAGES */
2390 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2391 pdf_putsi(&state->pages_obj, "/Kids [");
2392 pdf_putint(&state->pages_obj, state->page1_obj.id);
2393 pdf_puts(&state->pages_obj, " 0 R]\n");
2394 pdf_putsi(&state->pages_obj, "/Count 1\n");
2395 /* PAGE 1 */
2396 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2397 pdf_putsi(&state->page1_obj, "/Parent ");
2398 pdf_putint(&state->page1_obj, state->pages_obj.id);
2399 pdf_puts(&state->page1_obj, " 0 R\n");
2400 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2401 pdf_putint(&state->page1_obj, state->page_width);
2402 pdf_puts(&state->page1_obj, " ");
2403 pdf_putint(&state->page1_obj, state->page_height);
2404 pdf_puts(&state->page1_obj, "]\n");
2405 pdf_putsi(&state->page1_obj, "/Contents ");
2406 pdf_putint(&state->page1_obj, state->graph_stream.id);
2407 pdf_puts(&state->page1_obj, " 0 R\n");
2408 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2409 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2410 pdf_puts(&state->page1_obj, " 0 R >>\n");
2411 }
2413 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2414 {
2415 fputs(text, state->fp);
2416 state->pdf_file_pos += strlen(text);
2417 }
2419 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2420 {
2421 char tmp[40];
2422 buf->pdf_file_pos = state->pdf_file_pos;
2423 if (buf->is_obj) {
2424 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2425 pdf_write_string_to_file(state, tmp);
2426 }
2427 if (buf->is_dict)
2428 pdf_write_string_to_file(state, "<<\n");
2429 if (buf->is_stream) {
2430 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2431 pdf_write_string_to_file(state, tmp);
2432 pdf_write_string_to_file(state, "stream\n");
2433 }
2434 fwrite(buf->data, 1, buf->current_size, state->fp);
2435 state->pdf_file_pos += buf->current_size;
2436 if (buf->is_stream)
2437 pdf_write_string_to_file(state, "endstream\n");
2438 if (buf->is_dict)
2439 pdf_write_string_to_file(state, ">>\n");
2440 if (buf->is_obj)
2441 pdf_write_string_to_file(state, "endobj\n");
2442 }
2444 static void pdf_write_to_file(pdf_state *state)
2445 {
2446 pdf_buffer *buf = state->first_buffer;
2447 int xref_pos;
2448 state->pdf_file_pos = 0;
2449 pdf_write_buf_to_file(state, &state->pdf_header);
2450 while (buf) {
2451 if (buf->is_obj)
2452 pdf_write_buf_to_file(state, buf);
2453 buf = buf->next_buffer;
2454 }
2455 xref_pos = state->pdf_file_pos;
2456 fprintf(state->fp, "xref\n");
2457 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2458 /* TOC lines must be exactly 20 bytes including \n */
2459 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2460 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2461 if (buf->is_obj)
2462 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2463 }
2464 fprintf(state->fp, "trailer\n");
2465 fprintf(state->fp, "<<\n");
2466 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2467 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2468 fprintf(state->fp, "\t/Info %d 0 R\n", state->info_obj.id);
2469 fprintf(state->fp, ">>\n");
2470 fprintf(state->fp, "startxref\n");
2471 fprintf(state->fp, "%d\n", xref_pos);
2472 fputs("%%EOF\n", state->fp);
2473 }
2475 static void pdf_free_resources(pdf_state *state)
2476 {
2477 pdf_buffer *buf = state->first_buffer;
2478 while (buf) {
2479 free(buf->data);
2480 buf->data = NULL;
2481 buf->alloc_size = buf->current_size = 0;
2482 buf = buf->next_buffer;
2483 }
2484 while (state->font_list) {
2485 pdf_font *next = state->font_list->next;
2486 free(state->font_list);
2487 state->font_list = next;
2488 }
2489 }
2491 int gfx_render_pdf (gfx_canvas_t *canvas,
2492 art_u32 width, art_u32 height,
2493 gfx_color_t UNUSED(background), FILE *fp){
2494 struct pdf_state state;
2495 memset(&state, 0, sizeof(pdf_state));
2496 state.fp = fp;
2497 state.canvas = canvas;
2498 state.page_width = width;
2499 state.page_height = height;
2500 state.font_id = -1;
2501 state.font_size = -1;
2502 state.font_list = NULL;
2503 state.linecap = -1;
2504 state.linejoin = -1;
2505 pdf_init_document(&state);
2506 /*
2507 pdf_set_color(&state, background);
2508 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2509 height, width, height, width);
2510 */
2511 if (!state.has_failed)
2512 pdf_write_content(&state);
2513 if (!state.has_failed)
2514 pdf_setup_document(&state);
2515 if (!state.has_failed)
2516 pdf_write_to_file(&state);
2517 pdf_free_resources(&state);
2518 return state.has_failed ? -1 : 0;
2519 }