1 /****************************************************************************
2 * RRDtool 1.2.9 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 string->count=mbstowcs(cstr,"Enc-Err",6);
390 }
391 #else
392 char *cstr = strdup(text);
393 string->count = strlen (text);
394 #endif
396 ft_pen.x = 0; /* start at (0,0) !! */
397 ft_pen.y = 0;
400 string->width = 0;
401 string->height = 0;
402 string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
403 string->num_glyphs = 0;
404 string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
405 string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
406 string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
407 string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
409 use_kerning = FT_HAS_KERNING(face);
410 previous = 0;
411 glyph = string->glyphs;
412 for (n=0; n<string->count;glyph++,n++) {
413 FT_Vector vec;
414 /* handle the tabs ...
415 have a witespace glyph inserted, but set its width such that the distance
416 of the new right edge is x times tabwidth from 0,0 where x is an integer. */
417 unsigned int letter = cstr[n];
418 letter = afm_fix_osx_charset(letter); /* unsafe macro */
420 gottab = 0;
421 if (letter == '\\' && n+1 < string->count && cstr[n+1] == 't'){
422 /* we have a tab here so skip the backslash and
423 set t to ' ' so that we get a white space */
424 gottab = 1;
425 n++;
426 letter = ' ';
427 }
428 if (letter == '\t'){
429 letter = ' ';
430 gottab = 1 ;
431 }
432 /* initialize each struct gfx_char_s */
433 glyph->index = 0;
434 glyph->pos.x = 0;
435 glyph->pos.y = 0;
436 glyph->image = NULL;
437 glyph->index = FT_Get_Char_Index( face, letter );
439 /* compute glyph origin */
440 if ( use_kerning && previous && glyph->index ) {
441 FT_Vector kerning;
442 FT_Get_Kerning (face, previous, glyph->index,
443 ft_kerning_default, &kerning);
444 ft_pen.x += kerning.x;
445 ft_pen.y += kerning.y;
446 }
448 /* load the glyph image (in its native format) */
449 /* for now, we take a monochrome glyph bitmap */
450 error = FT_Load_Glyph (face, glyph->index, size > canvas->font_aa_threshold ?
451 canvas->aa_type == AA_NORMAL ? FT_LOAD_TARGET_NORMAL :
452 canvas->aa_type == AA_LIGHT ? FT_LOAD_TARGET_LIGHT :
453 FT_LOAD_TARGET_MONO : FT_LOAD_TARGET_MONO);
454 if (error) {
455 DPRINTF("couldn't load glyph: %c\n", letter)
456 continue;
457 }
458 error = FT_Get_Glyph (slot, &glyph->image);
459 if (error) {
460 DPRINTF("couldn't get glyph %c from slot %d\n", letter, (int)slot)
461 continue;
462 }
463 /* if we are in tabbing mode, we replace the tab with a space and shift the position
464 of the space so that its left edge is where the tab was supposed to land us */
465 if (gottab){
466 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
467 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
468 }
469 /* store current pen position */
470 glyph->pos.x = ft_pen.x;
471 glyph->pos.y = ft_pen.y;
474 ft_pen.x += slot->advance.x;
475 ft_pen.y += slot->advance.y;
477 /* rotate glyph */
478 vec = glyph->pos;
479 FT_Vector_Transform (&vec, &string->transform);
480 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
481 if (error) {
482 DPRINTF("couldn't transform glyph id %d\n", letter)
483 continue;
484 }
486 /* convert to a bitmap - destroy native image */
487 error = FT_Glyph_To_Bitmap (&glyph->image, size > canvas->font_aa_threshold ?
488 canvas->aa_type == AA_NORMAL ? FT_RENDER_MODE_NORMAL :
489 canvas->aa_type == AA_LIGHT ? FT_RENDER_MODE_LIGHT :
490 FT_RENDER_MODE_MONO : FT_RENDER_MODE_MONO, 0, 1);
491 if (error) {
492 DPRINTF("couldn't convert glyph id %d to bitmap\n", letter)
493 continue;
494 }
496 /* increment number of glyphs */
497 previous = glyph->index;
498 string->num_glyphs++;
499 }
500 free(cstr);
501 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
502 compute_string_bbox( string );
503 /* the last character was a tab */
504 /* if (gottab) { */
505 string->width = ft_pen.x;
506 /* } else {
507 string->width = string->bbox.xMax - string->bbox.xMin;
508 } */
509 string->height = string->bbox.yMax - string->bbox.yMin;
510 return string;
511 }
514 static int gfx_save_png (art_u8 *buffer, FILE *fp,
515 long width, long height, long bytes_per_pixel);
516 /* render grafics into png image */
518 int gfx_render_png (gfx_canvas_t *canvas,
519 art_u32 width, art_u32 height,
520 gfx_color_t background, FILE *fp){
523 FT_Library library;
524 gfx_node_t *node = canvas->firstnode;
525 /*
526 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
527 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
528 */
529 unsigned long pys_width = width * canvas->zoom;
530 unsigned long pys_height = height * canvas->zoom;
531 const int bytes_per_pixel = 4;
532 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
534 /* fill that buffer with out background color */
535 gfx_color_t *buffp = art_new (gfx_color_t, pys_width*pys_height);
536 art_u8 *buffer = (art_u8 *)buffp;
537 unsigned long i;
538 for (i=0;i<pys_width*pys_height;
539 i++){
540 *(buffp++)=background;
541 }
542 FT_Init_FreeType( &library );
543 while(node){
544 switch (node->type) {
545 case GFX_LINE:
546 case GFX_AREA: {
547 ArtVpath *vec;
548 double dst[6];
549 ArtSVP *svp;
550 art_affine_scale(dst,canvas->zoom,canvas->zoom);
551 vec = art_vpath_affine_transform(node->path,dst);
552 if (node->closed_path)
553 gfx_libart_close_path(node, &vec);
554 /* gfx_round_scaled_coordinates(vec); */
555 /* pvec = art_vpath_perturb(vec);
556 art_free(vec); */
557 if(node->type == GFX_LINE){
558 svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
559 ART_PATH_STROKE_CAP_ROUND,
560 node->size*canvas->zoom,4,0.25);
561 } else {
562 svp = art_svp_from_vpath ( vec );
563 /* this takes time and is unnecessary since we make
564 sure elsewhere that the areas are going clock-whise */
565 /* svpt = art_svp_uncross( svp );
566 art_svp_free(svp);
567 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
568 art_svp_free(svpt);
569 */
570 }
571 art_free(vec);
572 /* this is from gnome since libart does not have this yet */
573 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
574 node->color, buffer, rowstride, NULL);
575 art_svp_free(svp);
576 break;
577 }
578 case GFX_TEXT: {
579 unsigned int n;
580 int error;
581 art_u8 fcolor[4],falpha;
582 FT_Face face;
583 gfx_char glyph;
584 gfx_string string;
585 FT_Vector vec; /* 26.6 */
587 float pen_x = 0.0 , pen_y = 0.0;
588 /* double x,y; */
589 long ix,iy;
591 fcolor[0] = node->color >> 24;
592 fcolor[1] = (node->color >> 16) & 0xff;
593 fcolor[2] = (node->color >> 8) & 0xff;
594 falpha = node->color & 0xff;
595 error = FT_New_Face( library,
596 (char *)node->filename,
597 0,
598 &face );
599 if ( error ) {
600 rrd_set_error("failed to load %s",node->filename);
601 break;
602 }
603 error = FT_Set_Char_Size(face, /* handle to face object */
604 (long)(node->size*64),
605 (long)(node->size*64),
606 (long)(100*canvas->zoom),
607 (long)(100*canvas->zoom));
608 if ( error ) break;
609 pen_x = node->x * canvas->zoom;
610 pen_y = node->y * canvas->zoom;
612 string = gfx_string_create (canvas, face, node->text, node->angle, node->tabwidth, node->size);
613 switch(node->halign){
614 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
615 break;
616 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
617 -string->bbox.xMax/2:-string->bbox.xMin/2;
618 break;
619 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
620 break;
621 case GFX_H_NULL: vec.x = 0;
622 break;
623 }
625 switch(node->valign){
626 case GFX_V_TOP: vec.y = string->bbox.yMax;
627 break;
628 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
629 string->bbox.yMax/2:string->bbox.yMin/2;
630 break;
631 case GFX_V_BOTTOM: vec.y = 0;
632 break;
633 case GFX_V_NULL: vec.y = 0;
634 break;
635 }
636 pen_x += vec.x/64;
637 pen_y += vec.y/64;
638 glyph = string->glyphs;
639 for(n=0; n<string->num_glyphs; n++, glyph++) {
640 int gr;
641 FT_Glyph image;
642 FT_BitmapGlyph bit;
643 /* long buf_x,comp_n; */
644 /* make copy to transform */
645 if (! glyph->image) {
646 DPRINTF("no image\n")
647 continue;
648 }
649 error = FT_Glyph_Copy (glyph->image, &image);
650 if (error) {
651 DPRINTF("couldn't copy image\n")
652 continue;
653 }
655 /* transform it */
656 vec = glyph->pos;
657 FT_Vector_Transform (&vec, &string->transform);
659 bit = (FT_BitmapGlyph) image;
660 gr = bit->bitmap.num_grays -1;
661 /*
662 buf_x = (pen_x + 0.5) + (double)bit->left;
663 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
664 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
665 buf_x *= bytes_per_pixel ;
666 for (iy=0; iy < bit->bitmap.rows; iy++){
667 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
668 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
669 buf_y *= rowstride;
670 for (ix=0;ix < bit->bitmap.width;ix++){
671 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
672 }
673 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
674 }
675 art_free(letter);
676 */
677 switch ( bit->bitmap.pixel_mode ) {
678 case FT_PIXEL_MODE_GRAY:
679 for (iy=0; iy < bit->bitmap.rows; iy++){
680 long buf_y = iy+(pen_y+0.5)-bit->top;
681 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
682 buf_y *= rowstride;
683 for (ix=0;ix < bit->bitmap.width;ix++){
684 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
685 art_u8 font_alpha;
687 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
688 buf_x *= bytes_per_pixel ;
689 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix);
690 if (font_alpha > 0){
691 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
692 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
693 }
694 }
695 }
696 break;
698 case FT_PIXEL_MODE_MONO:
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 ;
706 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
707 buf_x *= bytes_per_pixel ;
708 if ( (fcolor[3] = falpha * ((*(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix/8) >> (7 - (ix % 8))) & 1)) > 0 )
709 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
710 }
711 }
712 break;
714 default:
715 rrd_set_error("unknown freetype pixel mode: %d", bit->bitmap.pixel_mode);
716 break;
717 }
719 /*
720 for (iy=0; iy < bit->bitmap.rows; iy++){
721 long buf_y = iy+(pen_y+0.5)-bit->top;
722 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
723 buf_y *= rowstride;
724 for (ix=0;ix < bit->bitmap.width;ix++){
725 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
726 art_u8 font_alpha;
728 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
729 buf_x *= bytes_per_pixel ;
730 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
731 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
732 for (iz = 0; iz < 3; iz++){
733 art_u8 *orig = buffer + buf_y + buf_x + iz;
734 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
735 (double)fcolor[iz] / gr * (font_alpha));
736 }
737 }
738 }
739 */
740 FT_Done_Glyph (image);
741 }
742 gfx_string_destroy(string);
743 }
744 }
745 node = node->next;
746 }
747 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
748 art_free(buffer);
749 FT_Done_FreeType( library );
750 return 0;
751 }
753 /* free memory used by nodes this will also remove memory required for
754 associated paths and svcs ... but not for text strings */
755 int
756 gfx_destroy (gfx_canvas_t *canvas){
757 gfx_node_t *next,*node = canvas->firstnode;
758 while(node){
759 next = node->next;
760 art_free(node->path);
761 free(node->text);
762 free(node->filename);
763 art_free(node);
764 node = next;
765 }
766 art_free(canvas);
767 return 0;
768 }
770 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
771 png_structp png_ptr = NULL;
772 png_infop info_ptr = NULL;
773 int i;
774 png_bytep *row_pointers;
775 int rowstride = width * bytes_per_pixel;
776 png_text text[2];
778 if (fp == NULL)
779 return (1);
781 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
782 if (png_ptr == NULL)
783 {
784 return (1);
785 }
786 row_pointers = (png_bytepp)png_malloc(png_ptr,
787 height*sizeof(png_bytep));
789 info_ptr = png_create_info_struct(png_ptr);
791 if (info_ptr == NULL)
792 {
793 png_free(png_ptr,row_pointers);
794 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
795 return (1);
796 }
798 if (setjmp(png_jmpbuf(png_ptr)))
799 {
800 /* If we get here, we had a problem writing the file */
801 png_destroy_write_struct(&png_ptr, &info_ptr);
802 return (1);
803 }
805 png_init_io(png_ptr, fp);
806 png_set_IHDR (png_ptr, info_ptr,width, height,
807 8, PNG_COLOR_TYPE_RGB_ALPHA,
808 PNG_INTERLACE_NONE,
809 PNG_COMPRESSION_TYPE_DEFAULT,
810 PNG_FILTER_TYPE_DEFAULT);
812 text[0].key = "Software";
813 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
814 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
815 png_set_text (png_ptr, info_ptr, text, 1);
817 /* lets make this fast while ending up with some increass in image size */
818 png_set_filter(png_ptr,0,PNG_FILTER_NONE);
819 /* png_set_filter(png_ptr,0,PNG_FILTER_SUB); */
820 png_set_compression_level(png_ptr,1);
821 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
822 /*
823 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
824 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
825 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
827 /* Write header data */
828 png_write_info (png_ptr, info_ptr);
829 for (i = 0; i < height; i++)
830 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
832 png_write_image(png_ptr, row_pointers);
833 png_write_end(png_ptr, info_ptr);
834 png_free(png_ptr,row_pointers);
835 png_destroy_write_struct(&png_ptr, &info_ptr);
836 return 1;
837 }
840 /* ----- COMMON ROUTINES for pdf, svg and eps */
841 #define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
842 #define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
844 #define PDF_CALC_DEBUG 0
846 typedef struct pdf_point
847 {
848 double x, y;
849 } pdf_point;
851 typedef struct
852 {
853 double ascender, descender, baselineY;
854 pdf_point sizep, minp, maxp;
855 double x, y, tdx, tdy;
856 double r, cos_r, sin_r;
857 double ma, mb, mc, md, mx, my; /* pdf coord matrix */
858 double tmx, tmy; /* last 2 coords of text coord matrix */
859 #if PDF_CALC_DEBUG
860 int debug;
861 #endif
862 } pdf_coords;
864 #if PDF_CALC_DEBUG
865 static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
866 {
867 fprintf(stderr, "PDF CALC =============================\n");
868 fprintf(stderr, " '%s' at %f pt\n", node->text, node->size);
869 fprintf(stderr, " align h = %s, v = %s, sizep = %f, %f\n",
870 (node->halign == GFX_H_RIGHT ? "r" :
871 (node->halign == GFX_H_CENTER ? "c" :
872 (node->halign == GFX_H_LEFT ? "l" : "N"))),
873 (node->valign == GFX_V_TOP ? "t" :
874 (node->valign == GFX_V_CENTER ? "c" :
875 (node->valign == GFX_V_BOTTOM ? "b" : "N"))),
876 g->sizep.x, g->sizep.y);
877 fprintf(stderr, " r = %f = %f, cos = %f, sin = %f\n",
878 g->r, node->angle, g->cos_r, g->sin_r);
879 fprintf(stderr, " ascender = %f, descender = %f, baselineY = %f\n",
880 g->ascender, g->descender, g->baselineY);
881 fprintf(stderr, " sizep: %f, %f\n", g->sizep.x, g->sizep.y);
882 fprintf(stderr, " minp: %f, %f maxp = %f, %f\n",
883 g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
884 fprintf(stderr, " x = %f, y = %f\n", g->x, g->y);
885 fprintf(stderr, " tdx = %f, tdy = %f\n", g->tdx, g->tdy);
886 fprintf(stderr, " GM = %f, %f, %f, %f, %f, %f\n",
887 g->ma, g->mb, g->mc, g->md, g->mx, g->my);
888 fprintf(stderr, " TM = %f, %f, %f, %f, %f, %f\n",
889 g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
890 }
891 #endif
893 #if PDF_CALC_DEBUG
894 #define PDF_DD(x) if (g->debug) x;
895 #else
896 #define PDF_DD(x)
897 #endif
899 static void pdf_rotate(pdf_coords *g, pdf_point *p)
900 {
901 double x2 = g->cos_r * p->x - g->sin_r * p->y;
902 double y2 = g->sin_r * p->x + g->cos_r * p->y;
903 PDF_DD( fprintf(stderr, " rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
904 p->x = x2;
905 p->y = y2;
906 }
909 static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
910 {
911 pdf_point a, b, c;
912 #if PDF_CALC_DEBUG
913 /* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
914 g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
915 #endif
916 g->x = node->x;
917 g->y = page_height - node->y;
918 if (node->angle) {
919 g->r = 2 * M_PI * node->angle / 360.0;
920 g->cos_r = cos(g->r);
921 g->sin_r = sin(g->r);
922 } else {
923 g->r = 0;
924 g->cos_r = 1;
925 g->sin_r = 0;
926 }
927 g->ascender = afm_get_ascender(node->filename, node->size);
928 g->descender = afm_get_descender(node->filename, node->size);
929 g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
930 /* seems like libart ignores the descender when doing vertial-align = bottom,
931 so we do that too, to get labels v-aligning properly */
932 g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
933 g->baselineY = -g->ascender - g->sizep.y / 2;
934 a.x = g->sizep.x; a.y = g->sizep.y;
935 b.x = g->sizep.x; b.y = 0;
936 c.x = 0; c.y = g->sizep.y;
937 if (node->angle) {
938 pdf_rotate(g, &a);
939 pdf_rotate(g, &b);
940 pdf_rotate(g, &c);
941 }
942 g->minp.x = min3(a.x, b.x, c.x);
943 g->minp.y = min3(a.y, b.y, c.y);
944 g->maxp.x = max3(a.x, b.x, c.x);
945 g->maxp.y = max3(a.y, b.y, c.y);
946 /* The alignment parameters in node->valign and node->halign
947 specifies the alignment in the non-rotated coordinate system
948 (very unlike pdf/postscript), which complicates matters.
949 */
950 switch (node->halign) {
951 case GFX_H_RIGHT: g->tdx = -g->maxp.x; break;
952 case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
953 case GFX_H_LEFT: g->tdx = -g->minp.x; break;
954 case GFX_H_NULL: g->tdx = 0; break;
955 }
956 switch(node->valign){
957 case GFX_V_TOP: g->tdy = -g->maxp.y; break;
958 case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
959 case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
960 case GFX_V_NULL: g->tdy = 0; break;
961 }
962 g->ma = g->cos_r;
963 g->mb = g->sin_r;
964 g->mc = -g->sin_r;
965 g->md = g->cos_r;
966 g->mx = g->x + g->tdx;
967 g->my = g->y + g->tdy;
968 g->tmx = g->mx - g->ascender * g->mc;
969 g->tmy = g->my - g->ascender * g->md;
970 PDF_DD(pdf_dump_calc(node, g))
971 }
973 /* ------- SVG -------
974 SVG reference:
975 http://www.w3.org/TR/SVG/
976 */
977 static int svg_indent = 0;
978 static int svg_single_line = 0;
979 static const char *svg_default_font = "-dummy-";
980 typedef struct svg_dash
981 {
982 int dash_enable;
983 double dash_adjust, dash_len, dash_offset;
984 double adjusted_on, adjusted_off;
985 } svg_dash;
988 static void svg_print_indent(FILE *fp)
989 {
990 int i;
991 for (i = svg_indent - svg_single_line; i > 0; i--) {
992 putc(' ', fp);
993 putc(' ', fp);
994 }
995 }
997 static void svg_start_tag(FILE *fp, const char *name)
998 {
999 svg_print_indent(fp);
1000 putc('<', fp);
1001 fputs(name, fp);
1002 svg_indent++;
1003 }
1005 static void svg_close_tag_single_line(FILE *fp)
1006 {
1007 svg_single_line++;
1008 putc('>', fp);
1009 }
1011 static void svg_close_tag(FILE *fp)
1012 {
1013 putc('>', fp);
1014 if (!svg_single_line)
1015 putc('\n', fp);
1016 }
1018 static void svg_end_tag(FILE *fp, const char *name)
1019 {
1020 /* name is NULL if closing empty-node tag */
1021 svg_indent--;
1022 if (svg_single_line)
1023 svg_single_line--;
1024 else if (name)
1025 svg_print_indent(fp);
1026 if (name != NULL) {
1027 fputs("</", fp);
1028 fputs(name, fp);
1029 } else {
1030 putc('/', fp);
1031 }
1032 svg_close_tag(fp);
1033 }
1035 static void svg_close_tag_empty_node(FILE *fp)
1036 {
1037 svg_end_tag(fp, NULL);
1038 }
1040 static void svg_write_text(FILE *fp, const char *text)
1041 {
1042 #ifdef HAVE_MBSTOWCS
1043 size_t clen;
1044 wchar_t *p, *cstr, ch;
1045 int text_count;
1046 if (!text)
1047 return;
1048 clen = strlen(text) + 1;
1049 cstr = malloc(sizeof(wchar_t) * clen);
1050 text_count = mbstowcs(cstr, text, clen);
1051 if (text_count == -1)
1052 text_count = mbstowcs(cstr, "Enc-Err", 6);
1053 p = cstr;
1054 #else
1055 const unsigned char *p = text, ch;
1056 if (!p)
1057 return;
1058 #endif
1059 while (1) {
1060 ch = *p++;
1061 ch = afm_fix_osx_charset(ch); /* unsafe macro */
1062 switch (ch) {
1063 case 0:
1064 #ifdef HAVE_MBSTOWCS
1065 free(cstr);
1066 #endif
1067 return;
1068 case '&': fputs("&", fp); break;
1069 case '<': fputs("<", fp); break;
1070 case '>': fputs(">", fp); break;
1071 case '"': fputs(""", fp); break;
1072 default:
1073 if (ch == 32) {
1074 if (p <= cstr + 1 || !*p || *p == 32)
1075 fputs(" ", fp); /* non-breaking space in unicode */
1076 else
1077 fputc(32, fp);
1078 } else if (ch < 32 || ch >= 127)
1079 fprintf(fp, "&#%d;", (int)ch);
1080 else
1081 putc((char)ch, fp);
1082 }
1083 }
1084 }
1086 static void svg_format_number(char *buf, int bufsize, double d)
1087 {
1088 /* omit decimals if integer to reduce filesize */
1089 char *p;
1090 snprintf(buf, bufsize, "%.2f", d);
1091 p = buf; /* doesn't trust snprintf return value */
1092 while (*p)
1093 p++;
1094 while (--p > buf) {
1095 char ch = *p;
1096 if (ch == '0') {
1097 *p = '\0'; /* zap trailing zeros */
1098 continue;
1099 }
1100 if (ch == '.')
1101 *p = '\0'; /* zap trailing dot */
1102 break;
1103 }
1104 }
1106 static void svg_write_number(FILE *fp, double d)
1107 {
1108 char buf[60];
1109 svg_format_number(buf, sizeof(buf), d);
1110 fputs(buf, fp);
1111 }
1113 static int svg_color_is_black(int c)
1114 {
1115 /* gfx_color_t is RRGGBBAA */
1116 return c == 0x000000FF;
1117 }
1119 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
1120 {
1121 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
1122 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
1123 gfx_color_t opacity = c & 0xFF;
1124 fprintf(fp, " %s=\"", attr);
1125 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
1126 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
1127 fprintf(fp, "#%03lX",
1128 ( ((rrggbb >> 8) & 0xF00)
1129 | ((rrggbb >> 4) & 0x0F0)
1130 | ( rrggbb & 0x00F)));
1131 } else {
1132 fprintf(fp, "#%06lX", rrggbb);
1133 }
1134 fputs("\"", fp);
1135 if (opacity != 0xFF) {
1136 fprintf(fp, " opacity=\"");
1137 svg_write_number(fp, opacity / 255.0);
1138 fputs("\"", fp);
1139 }
1140 }
1142 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
1143 {
1144 double offset;
1145 int mult;
1146 if (node->dash_on <= 0 || node->dash_off <= 0) {
1147 d->dash_enable = 0;
1148 return;
1149 }
1150 d->dash_enable = 1;
1151 d->dash_len = node->dash_on + node->dash_off;
1152 /* dash on/off adjustment due to round caps */
1153 d->dash_adjust = 0.8 * node->size;
1154 d->adjusted_on = node->dash_on - d->dash_adjust;
1155 if (d->adjusted_on < 0.01)
1156 d->adjusted_on = 0.01;
1157 d->adjusted_off = d->dash_len - d->adjusted_on;
1158 /* dash offset calc */
1159 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
1160 offset = node->path[0].y;
1161 else
1162 offset = node->path[0].x;
1163 mult = (int)fabs(offset / d->dash_len);
1164 d->dash_offset = offset - mult * d->dash_len;
1165 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
1166 d->dash_offset = d->dash_len - d->dash_offset;
1167 }
1169 static int svg_dash_equal(svg_dash *a, svg_dash *b)
1170 {
1171 if (a->dash_enable != b->dash_enable)
1172 return 0;
1173 if (a->adjusted_on != b->adjusted_on)
1174 return 0;
1175 if (a->adjusted_off != b->adjusted_off)
1176 return 0;
1177 /* rest of properties will be the same when on+off are */
1178 return 1;
1179 }
1181 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
1182 {
1183 svg_dash dash_info;
1184 svg_get_dash(node, &dash_info);
1185 fputs(" stroke-width=\"", fp);
1186 svg_write_number(fp, node->size);
1187 fputs("\"", fp);
1188 svg_write_color(fp, node->color, "stroke");
1189 fputs(" fill=\"none\"", fp);
1190 if (dash_info.dash_enable) {
1191 if (dash_info.dash_offset != 0) {
1192 fputs(" stroke-dashoffset=\"", fp);
1193 svg_write_number(fp, dash_info.dash_offset);
1194 fputs("\"", fp);
1195 }
1196 fputs(" stroke-dasharray=\"", fp);
1197 svg_write_number(fp, dash_info.adjusted_on);
1198 fputs(",", fp);
1199 svg_write_number(fp, dash_info.adjusted_off);
1200 fputs("\"", fp);
1201 }
1202 }
1204 static int svg_is_int_step(double a, double b)
1205 {
1206 double diff = fabs(a - b);
1207 return floor(diff) == diff;
1208 }
1210 static int svg_path_straight_segment(FILE *fp,
1211 double lastA, double currentA, double currentB,
1212 gfx_node_t *node,
1213 int segment_idx, int isx, char absChar, char relChar)
1214 {
1215 if (!svg_is_int_step(lastA, currentA)) {
1216 putc(absChar, fp);
1217 svg_write_number(fp, currentA);
1218 return 0;
1219 }
1220 if (segment_idx < node->points - 1) {
1221 ArtVpath *vec = node->path + segment_idx + 1;
1222 if (vec->code == ART_LINETO) {
1223 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1224 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1225 if (nextB == currentB
1226 && ((currentA >= lastA) == (nextA >= currentA))
1227 && svg_is_int_step(currentA, nextA)) {
1228 return 1; /* skip to next as it is a straight line */
1229 }
1230 }
1231 }
1232 putc(relChar, fp);
1233 svg_write_number(fp, currentA - lastA);
1234 return 0;
1235 }
1237 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1238 {
1239 int i;
1240 double lastX = 0, lastY = 0;
1241 /* for straight lines <path..> tags take less space than
1242 <line..> tags because of the efficient packing
1243 in the 'd' attribute */
1244 svg_start_tag(fp, "path");
1245 if (!multi)
1246 svg_common_path_attributes(fp, node);
1247 fputs(" d=\"", fp);
1248 /* specification of the 'd' attribute: */
1249 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1250 for (i = 0; i < node->points; i++) {
1251 ArtVpath *vec = node->path + i;
1252 double x = vec->x - LINEOFFSET;
1253 double y = vec->y - LINEOFFSET;
1254 switch (vec->code) {
1255 case ART_MOVETO_OPEN: /* fall-through */
1256 case ART_MOVETO:
1257 putc('M', fp);
1258 svg_write_number(fp, x);
1259 putc(',', fp);
1260 svg_write_number(fp, y);
1261 break;
1262 case ART_LINETO:
1263 /* try optimize filesize by using minimal lineto commands */
1264 /* without introducing rounding errors. */
1265 if (x == lastX) {
1266 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1267 continue;
1268 } else if (y == lastY) {
1269 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1270 continue;
1271 } else {
1272 putc('L', fp);
1273 svg_write_number(fp, x);
1274 putc(',', fp);
1275 svg_write_number(fp, y);
1276 }
1277 break;
1278 case ART_CURVETO: break; /* unsupported */
1279 case ART_END: break; /* nop */
1280 }
1281 lastX = x;
1282 lastY = y;
1283 }
1284 if (node->closed_path)
1285 fputs(" Z", fp);
1286 fputs("\"", fp);
1287 svg_close_tag_empty_node(fp);
1288 }
1290 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1291 {
1292 /* optimize for multiple paths with the same color, penwidth, etc. */
1293 int num = 1;
1294 gfx_node_t *node = *nodeR;
1295 gfx_node_t *next = node->next;
1296 while (next) {
1297 if (next->type != node->type
1298 || next->size != node->size
1299 || next->color != node->color
1300 || next->dash_on != node->dash_on
1301 || next->dash_off != node->dash_off)
1302 break;
1303 next = next->next;
1304 num++;
1305 }
1306 if (num == 1) {
1307 svg_path(fp, node, 0);
1308 return;
1309 }
1310 svg_start_tag(fp, "g");
1311 svg_common_path_attributes(fp, node);
1312 svg_close_tag(fp);
1313 while (num && node) {
1314 svg_path(fp, node, 1);
1315 if (!--num)
1316 break;
1317 node = node->next;
1318 *nodeR = node;
1319 }
1320 svg_end_tag(fp, "g");
1321 }
1323 static void svg_area(FILE *fp, gfx_node_t *node)
1324 {
1325 int i;
1326 double startX = 0, startY = 0;
1327 svg_start_tag(fp, "polygon");
1328 fputs(" ", fp);
1329 svg_write_color(fp, node->color, "fill");
1330 fputs(" points=\"", fp);
1331 for (i = 0; i < node->points; i++) {
1332 ArtVpath *vec = node->path + i;
1333 double x = vec->x - LINEOFFSET;
1334 double y = vec->y - LINEOFFSET;
1335 switch (vec->code) {
1336 case ART_MOVETO_OPEN: /* fall-through */
1337 case ART_MOVETO:
1338 svg_write_number(fp, x);
1339 putc(',', fp);
1340 svg_write_number(fp, y);
1341 startX = x;
1342 startY = y;
1343 break;
1344 case ART_LINETO:
1345 if (i == node->points - 2
1346 && node->path[i + 1].code == ART_END
1347 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1348 break; /* poly area always closed, no need for last point */
1349 }
1350 putc(' ', fp);
1351 svg_write_number(fp, x);
1352 putc(',', fp);
1353 svg_write_number(fp, y);
1354 break;
1355 case ART_CURVETO: break; /* unsupported */
1356 case ART_END: break; /* nop */
1357 }
1358 }
1359 fputs("\"", fp);
1360 svg_close_tag_empty_node(fp);
1361 }
1363 static void svg_text(FILE *fp, gfx_node_t *node)
1364 {
1365 pdf_coords g;
1366 const char *fontname;
1367 /* as svg has 0,0 in top-left corner (like most screens) instead of
1368 bottom-left corner like pdf and eps, we have to fake the coords
1369 using offset and inverse sin(r) value */
1370 int page_height = 1000;
1371 pdf_calc(page_height, node, &g);
1372 if (node->angle != 0) {
1373 svg_start_tag(fp, "g");
1374 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1375 skewed text */
1376 fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
1377 g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
1378 svg_close_tag(fp);
1379 }
1380 svg_start_tag(fp, "text");
1381 if (!node->angle) {
1382 fputs(" x=\"", fp);
1383 svg_write_number(fp, g.tmx);
1384 fputs("\" y=\"", fp);
1385 svg_write_number(fp, page_height - g.tmy);
1386 fputs("\"", fp);
1387 }
1388 fontname = afm_get_font_name(node->filename);
1389 if (strcmp(fontname, svg_default_font))
1390 fprintf(fp, " font-family=\"%s\"", fontname);
1391 fputs(" font-size=\"", fp);
1392 svg_write_number(fp, node->size);
1393 fputs("\"", fp);
1394 if (!svg_color_is_black(node->color))
1395 svg_write_color(fp, node->color, "fill");
1396 svg_close_tag_single_line(fp);
1397 /* support for node->tabwidth missing */
1398 svg_write_text(fp, node->text);
1399 svg_end_tag(fp, "text");
1400 if (node->angle != 0)
1401 svg_end_tag(fp, "g");
1402 }
1404 int gfx_render_svg (gfx_canvas_t *canvas,
1405 art_u32 width, art_u32 height,
1406 gfx_color_t background, FILE *fp){
1407 gfx_node_t *node = canvas->firstnode;
1408 /* Find the first font used, and assume it is the mostly used
1409 one. It reduces the number of font-familty attributes. */
1410 while (node) {
1411 if (node->type == GFX_TEXT && node->filename) {
1412 svg_default_font = afm_get_font_name(node->filename);
1413 break;
1414 }
1415 node = node->next;
1416 }
1417 fputs(
1418 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1419 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1420 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1421 "<!--\n"
1422 " SVG file created by\n"
1423 " RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1424 "\n"
1425 " The width/height attributes in the outhermost svg node\n"
1426 " are just default sizes for the browser which is used\n"
1427 " if the svg file is openened directly without being\n"
1428 " embedded in an html file.\n"
1429 " The viewBox is the local coord system for rrdtool.\n"
1430 "-->\n", fp);
1431 svg_start_tag(fp, "svg");
1432 fputs(" width=\"", fp);
1433 svg_write_number(fp, width * canvas->zoom);
1434 fputs("\" height=\"", fp);
1435 svg_write_number(fp, height * canvas->zoom);
1436 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1437 svg_write_number(fp, -LINEOFFSET);
1438 fputs(" ", fp);
1439 svg_write_number(fp, -LINEOFFSET);
1440 fputs(" ", fp);
1441 svg_write_number(fp, width - LINEOFFSET);
1442 fputs(" ", fp);
1443 svg_write_number(fp, height - LINEOFFSET);
1444 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1445 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1446 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1447 svg_close_tag(fp);
1448 svg_start_tag(fp, "rect");
1449 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1450 svg_write_color(fp, background, "fill");
1451 svg_close_tag_empty_node(fp);
1452 node = canvas->firstnode;
1453 while (node) {
1454 switch (node->type) {
1455 case GFX_LINE:
1456 svg_multi_path(fp, &node);
1457 break;
1458 case GFX_AREA:
1459 svg_area(fp, node);
1460 break;
1461 case GFX_TEXT:
1462 svg_text(fp, node);
1463 }
1464 node = node->next;
1465 }
1466 svg_end_tag(fp, "svg");
1467 return 0;
1468 }
1470 /* ------- EPS -------
1471 EPS and Postscript references:
1472 http://partners.adobe.com/asn/developer/technotes/postscript.html
1473 */
1475 typedef struct eps_font
1476 {
1477 const char *ps_font;
1478 int id;
1479 struct eps_font *next;
1480 } eps_font;
1482 typedef struct eps_state
1483 {
1484 FILE *fp;
1485 gfx_canvas_t *canvas;
1486 art_u32 page_width, page_height;
1487 eps_font *font_list;
1488 /*--*/
1489 gfx_color_t color;
1490 const char *font;
1491 double font_size;
1492 double line_width;
1493 int linecap, linejoin;
1494 int has_dash;
1495 } eps_state;
1497 static void eps_set_color(eps_state *state, gfx_color_t color)
1498 {
1499 #if USE_EPS_FAKE_ALPHA
1500 double a1, a2;
1501 #endif
1502 /* gfx_color_t is RRGGBBAA */
1503 if (state->color == color)
1504 return;
1505 #if USE_EPS_FAKE_ALPHA
1506 a1 = (color & 255) / 255.0;
1507 a2 = 255 * (1 - a1);
1508 #define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
1509 #else
1510 #define eps_color_calc(x) (int)( (x) & 255)
1511 #endif
1512 /* gfx_color_t is RRGGBBAA */
1513 if (state->color == color)
1514 return;
1515 fprintf(state->fp, "%d %d %d Rgb\n",
1516 eps_color_calc(color >> 24),
1517 eps_color_calc(color >> 16),
1518 eps_color_calc(color >> 8));
1519 state->color = color;
1520 }
1522 static int eps_add_font(eps_state *state, gfx_node_t *node)
1523 {
1524 /* The fonts list could be postponed to the end using
1525 (atend), but let's be nice and have them in the header. */
1526 const char *ps_font = afm_get_font_postscript_name(node->filename);
1527 eps_font *ef;
1528 for (ef = state->font_list; ef; ef = ef->next) {
1529 if (!strcmp(ps_font, ef->ps_font))
1530 return 0;
1531 }
1532 ef = malloc(sizeof(eps_font));
1533 if (ef == NULL) {
1534 rrd_set_error("malloc for eps_font");
1535 return -1;
1536 }
1537 ef->next = state->font_list;
1538 ef->ps_font = ps_font;
1539 state->font_list = ef;
1540 return 0;
1541 }
1543 static void eps_list_fonts(eps_state *state, const char *dscName)
1544 {
1545 eps_font *ef;
1546 int lineLen = strlen(dscName);
1547 if (!state->font_list)
1548 return;
1549 fputs(dscName, state->fp);
1550 for (ef = state->font_list; ef; ef = ef->next) {
1551 int nameLen = strlen(ef->ps_font);
1552 if (lineLen + nameLen > 100 && lineLen) {
1553 fputs("\n", state->fp);
1554 fputs("%%- \n", state->fp);
1555 lineLen = 5;
1556 } else {
1557 fputs(" ", state->fp);
1558 lineLen++;
1559 }
1560 fputs(ef->ps_font, state->fp);
1561 lineLen += nameLen;
1562 }
1563 fputs("\n", state->fp);
1564 }
1566 static void eps_define_fonts(eps_state *state)
1567 {
1568 eps_font *ef;
1569 if (!state->font_list)
1570 return;
1571 for (ef = state->font_list; ef; ef = ef->next) {
1572 /* PostScript¨ LANGUAGE REFERENCE third edition
1573 page 349 */
1574 fprintf(state->fp,
1575 "%%\n"
1576 "/%s findfont dup length dict begin\n"
1577 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1578 "/Encoding ISOLatin1Encoding def\n"
1579 "currentdict end\n"
1580 "/%s-ISOLatin1 exch definefont pop\n"
1581 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1582 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1583 }
1584 }
1586 static int eps_prologue(eps_state *state)
1587 {
1588 gfx_node_t *node;
1589 fputs(
1590 "%!PS-Adobe-3.0 EPSF-3.0\n"
1591 "%%Creator: RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1592 /* can't like weird chars here */
1593 "%%Title: (RRDtool output)\n"
1594 "%%DocumentData: Clean7Bit\n"
1595 "", state->fp);
1596 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1597 state->page_width, state->page_height);
1598 for (node = state->canvas->firstnode; node; node = node->next) {
1599 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1600 return -1;
1601 }
1602 eps_list_fonts(state, "%%DocumentFonts:");
1603 eps_list_fonts(state, "%%DocumentNeededFonts:");
1604 fputs(
1605 "%%EndComments\n"
1606 "%%BeginProlog\n"
1607 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1608 "/bd { bind def } bind def\n"
1609 "", state->fp);
1610 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1611 fputs(
1612 "/X2 {X exch X exch} bd\n"
1613 "/M {X2 moveto} bd\n"
1614 "/L {X2 lineto} bd\n"
1615 "/m {moveto} bd\n"
1616 "/l {lineto} bd\n"
1617 "/S {stroke} bd\n"
1618 "/CP {closepath} bd\n"
1619 "/WS {setlinewidth stroke} bd\n"
1620 "/F {fill} bd\n"
1621 "/T1 {gsave} bd\n"
1622 "/T2 {concat 0 0 moveto show grestore} bd\n"
1623 "/T {moveto show} bd\n"
1624 "/Rgb { 255.0 div 3 1 roll\n"
1625 " 255.0 div 3 1 roll \n"
1626 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1627 "", state->fp);
1628 eps_define_fonts(state);
1629 return 0;
1630 }
1632 static void eps_clear_dash(eps_state *state)
1633 {
1634 if (!state->has_dash)
1635 return;
1636 state->has_dash = 0;
1637 fputs("[1 0] 0 setdash\n", state->fp);
1638 }
1640 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1641 {
1642 int i;
1643 FILE *fp = state->fp;
1644 int useOffset = 0;
1645 int clearDashIfAny = 1;
1646 eps_set_color(state, node->color);
1647 if (node->type == GFX_LINE) {
1648 svg_dash dash_info;
1649 if (state->linecap != 1) {
1650 fputs("1 setlinecap\n", fp);
1651 state->linecap = 1;
1652 }
1653 if (state->linejoin != 1) {
1654 fputs("1 setlinejoin\n", fp);
1655 state->linejoin = 1;
1656 }
1657 svg_get_dash(node, &dash_info);
1658 if (dash_info.dash_enable) {
1659 clearDashIfAny = 0;
1660 state->has_dash = 1;
1661 fputs("[", fp);
1662 svg_write_number(fp, dash_info.adjusted_on);
1663 fputs(" ", fp);
1664 svg_write_number(fp, dash_info.adjusted_off);
1665 fputs("] ", fp);
1666 svg_write_number(fp, dash_info.dash_offset);
1667 fputs(" setdash\n", fp);
1668 }
1669 }
1670 if (clearDashIfAny)
1671 eps_clear_dash(state);
1672 for (i = 0; i < node->points; i++) {
1673 ArtVpath *vec = node->path + i;
1674 double x = vec->x;
1675 double y = state->page_height - vec->y;
1676 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1677 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1678 if (useOffset) {
1679 x -= LINEOFFSET;
1680 y -= LINEOFFSET;
1681 }
1682 switch (vec->code) {
1683 case ART_MOVETO_OPEN: /* fall-through */
1684 case ART_MOVETO:
1685 svg_write_number(fp, x);
1686 fputc(' ', fp);
1687 svg_write_number(fp, y);
1688 fputc(' ', fp);
1689 fputs(useOffset ? "M\n" : "m\n", fp);
1690 break;
1691 case ART_LINETO:
1692 svg_write_number(fp, x);
1693 fputc(' ', fp);
1694 svg_write_number(fp, y);
1695 fputc(' ', fp);
1696 fputs(useOffset ? "L\n" : "l\n", fp);
1697 break;
1698 case ART_CURVETO: break; /* unsupported */
1699 case ART_END: break; /* nop */
1700 }
1701 }
1702 if (node->type == GFX_LINE) {
1703 if (node->closed_path)
1704 fputs("CP ", fp);
1705 if (node->size != state->line_width) {
1706 state->line_width = node->size;
1707 svg_write_number(fp, state->line_width);
1708 fputs(" WS\n", fp);
1709 } else {
1710 fputs("S\n", fp);
1711 }
1712 } else {
1713 fputs("F\n", fp);
1714 }
1715 }
1717 static void eps_write_text(eps_state *state, gfx_node_t *node)
1718 {
1719 FILE *fp = state->fp;
1720 const char *ps_font = afm_get_font_postscript_name(node->filename);
1721 int lineLen = 0;
1722 pdf_coords g;
1723 #ifdef HAVE_MBSTOWCS
1724 size_t clen;
1725 wchar_t *p, *cstr, ch;
1726 int text_count;
1727 if (!node->text)
1728 return;
1729 clen = strlen(node->text) + 1;
1730 cstr = malloc(sizeof(wchar_t) * clen);
1731 text_count = mbstowcs(cstr, node->text, clen);
1732 if (text_count == -1)
1733 text_count = mbstowcs(cstr, "Enc-Err", 6);
1734 p = cstr;
1735 #else
1736 const unsigned char *p = node->text, ch;
1737 if (!p)
1738 return;
1739 #endif
1740 pdf_calc(state->page_height, node, &g);
1741 eps_set_color(state, node->color);
1742 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1743 state->font = ps_font;
1744 state->font_size = node->size;
1745 svg_write_number(fp, state->font_size);
1746 fprintf(fp, " SetFont-%s\n", state->font);
1747 }
1748 if (node->angle)
1749 fputs("T1 ", fp);
1750 fputs("(", fp);
1751 lineLen = 20;
1752 while (1) {
1753 ch = *p;
1754 if (!ch)
1755 break;
1756 ch = afm_fix_osx_charset(ch); /* unsafe macro */
1757 if (++lineLen > 70) {
1758 fputs("\\\n", fp); /* backslash and \n */
1759 lineLen = 0;
1760 }
1761 switch (ch) {
1762 case '%':
1763 case '(':
1764 case ')':
1765 case '\\':
1766 fputc('\\', fp);
1767 fputc(ch, fp);
1768 break;
1769 case '\n':
1770 fputs("\\n", fp);
1771 break;
1772 case '\r':
1773 fputs("\\r", fp);
1774 break;
1775 case '\t':
1776 fputs("\\t", fp);
1777 break;
1778 default:
1779 if (ch > 255) {
1780 fputc('?', fp);
1781 } else if (ch >= 126 || ch < 32) {
1782 fprintf(fp, "\\%03o", (unsigned int)ch);
1783 lineLen += 3;
1784 } else {
1785 fputc(ch, fp);
1786 }
1787 }
1788 p++;
1789 }
1790 #ifdef HAVE_MBSTOWCS
1791 free(cstr);
1792 #endif
1793 if (node->angle) {
1794 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1795 skewed text */
1796 fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
1797 g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
1798 } else {
1799 fputs(") ", fp);
1800 svg_write_number(fp, g.tmx);
1801 fputs(" ", fp);
1802 svg_write_number(fp, g.tmy);
1803 fputs(" T\n", fp);
1804 }
1805 }
1807 static int eps_write_content(eps_state *state)
1808 {
1809 gfx_node_t *node;
1810 fputs("%\n", state->fp);
1811 for (node = state->canvas->firstnode; node; node = node->next) {
1812 switch (node->type) {
1813 case GFX_LINE:
1814 case GFX_AREA:
1815 eps_write_linearea(state, node);
1816 break;
1817 case GFX_TEXT:
1818 eps_write_text(state, node);
1819 break;
1820 }
1821 }
1822 return 0;
1823 }
1825 int gfx_render_eps (gfx_canvas_t *canvas,
1826 art_u32 width, art_u32 height,
1827 gfx_color_t background, FILE *fp){
1828 struct eps_state state;
1829 state.fp = fp;
1830 state.canvas = canvas;
1831 state.page_width = width;
1832 state.page_height = height;
1833 state.font = "no-default-font";
1834 state.font_size = -1;
1835 state.color = 0; /* black */
1836 state.font_list = NULL;
1837 state.linecap = -1;
1838 state.linejoin = -1;
1839 state.has_dash = 0;
1840 state.line_width = 1;
1841 if (eps_prologue(&state) == -1)
1842 return -1;
1843 eps_set_color(&state, background);
1844 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1845 height, width, height, width);
1846 if (eps_write_content(&state) == -1)
1847 return 0;
1848 fputs("showpage\n", fp);
1849 fputs("%%EOF\n", fp);
1850 while (state.font_list) {
1851 eps_font *next = state.font_list->next;
1852 free(state.font_list);
1853 state.font_list = next;
1854 }
1855 return 0;
1856 }
1858 /* ------- PDF -------
1859 PDF references page:
1860 http://partners.adobe.com/public/developer/pdf/index_reference.html
1861 */
1863 typedef struct pdf_buffer
1864 {
1865 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1866 char *data;
1867 int alloc_size, current_size;
1868 struct pdf_buffer *previous_buffer, *next_buffer;
1869 struct pdf_state *state;
1870 } pdf_buffer;
1872 typedef struct pdf_font
1873 {
1874 const char *ps_font;
1875 pdf_buffer obj;
1876 struct pdf_font *next;
1877 } pdf_font;
1879 typedef struct pdf_state
1880 {
1881 FILE *fp;
1882 gfx_canvas_t *canvas;
1883 art_u32 page_width, page_height;
1884 pdf_font *font_list;
1885 pdf_buffer *first_buffer, *last_buffer;
1886 int pdf_file_pos;
1887 int has_failed;
1888 /*--*/
1889 gfx_color_t stroke_color, fill_color;
1890 int font_id;
1891 double font_size;
1892 double line_width;
1893 svg_dash dash;
1894 int linecap, linejoin;
1895 int last_obj_id;
1896 /*--*/
1897 pdf_buffer pdf_header;
1898 pdf_buffer info_obj, catalog_obj, pages_obj, page1_obj;
1899 pdf_buffer fontsdict_obj;
1900 pdf_buffer graph_stream;
1901 } pdf_state;
1903 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1904 {
1905 int initial_size = 32;
1906 buf->state = state;
1907 buf->id = -42;
1908 buf->alloc_size = 0;
1909 buf->current_size = 0;
1910 buf->data = (char*)malloc(initial_size);
1911 buf->is_obj = 0;
1912 buf->previous_buffer = NULL;
1913 buf->next_buffer = NULL;
1914 if (buf->data == NULL) {
1915 rrd_set_error("malloc for pdf_buffer data");
1916 state->has_failed = 1;
1917 return;
1918 }
1919 buf->alloc_size = initial_size;
1920 if (state->last_buffer)
1921 state->last_buffer->next_buffer = buf;
1922 if (state->first_buffer == NULL)
1923 state->first_buffer = buf;
1924 buf->previous_buffer = state->last_buffer;
1925 state->last_buffer = buf;
1926 }
1928 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1929 {
1930 if (len <= 0)
1931 return;
1932 if (buf->alloc_size < buf->current_size + len) {
1933 int new_size = buf->alloc_size;
1934 char *new_buf;
1935 while (new_size < buf->current_size + len)
1936 new_size *= 4;
1937 new_buf = (char*)malloc(new_size);
1938 if (new_buf == NULL) {
1939 rrd_set_error("re-malloc for pdf_buffer data");
1940 buf->state->has_failed = 1;
1941 return;
1942 }
1943 memcpy(new_buf, buf->data, buf->current_size);
1944 free(buf->data);
1945 buf->data = new_buf;
1946 buf->alloc_size = new_size;
1947 }
1948 memcpy(buf->data + buf->current_size, text, len);
1949 buf->current_size += len;
1950 }
1952 static void pdf_put_char(pdf_buffer *buf, char c)
1953 {
1954 if (buf->alloc_size >= buf->current_size + 1) {
1955 buf->data[buf->current_size++] = c;
1956 } else {
1957 char tmp[1];
1958 tmp[0] = (char)c;
1959 pdf_put(buf, tmp, 1);
1960 }
1961 }
1963 static void pdf_puts(pdf_buffer *buf, const char *text)
1964 {
1965 pdf_put(buf, text, strlen(text));
1966 }
1968 static void pdf_indent(pdf_buffer *buf)
1969 {
1970 pdf_puts(buf, "\t");
1971 }
1973 static void pdf_putsi(pdf_buffer *buf, const char *text)
1974 {
1975 pdf_indent(buf);
1976 pdf_puts(buf, text);
1977 }
1979 static void pdf_putint(pdf_buffer *buf, int i)
1980 {
1981 char tmp[20];
1982 sprintf(tmp, "%d", i);
1983 pdf_puts(buf, tmp);
1984 }
1986 static void pdf_putnumber(pdf_buffer *buf, double d)
1987 {
1988 char tmp[50];
1989 svg_format_number(tmp, sizeof(tmp), d);
1990 pdf_puts(buf, tmp);
1991 }
1993 static void pdf_put_string_contents_wide(pdf_buffer *buf, const afm_char *text)
1994 {
1995 const afm_char *p = text;
1996 while (1) {
1997 afm_char ch = *p;
1998 ch = afm_fix_osx_charset(ch); /* unsafe macro */
1999 switch (ch) {
2000 case 0:
2001 return;
2002 case '(':
2003 pdf_puts(buf, "\\(");
2004 break;
2005 case ')':
2006 pdf_puts(buf, "\\)");
2007 break;
2008 case '\\':
2009 pdf_puts(buf, "\\\\");
2010 break;
2011 case '\n':
2012 pdf_puts(buf, "\\n");
2013 break;
2014 case '\r':
2015 pdf_puts(buf, "\\r");
2016 break;
2017 case '\t':
2018 pdf_puts(buf, "\\t");
2019 break;
2020 default:
2021 if (ch > 255) {
2022 pdf_put_char(buf, '?');
2023 } else if (ch >= 126 || ch < 32) {
2024 pdf_put_char(buf, ch);
2025 } else if (ch >= 0 && ch <= 255) {
2026 char tmp[10];
2027 snprintf(tmp, sizeof(tmp), "\\%03o", (int)ch);
2028 pdf_puts(buf, tmp);
2029 }
2030 }
2031 p++;
2032 }
2033 }
2035 static void pdf_put_string_contents(pdf_buffer *buf, const char *text)
2036 {
2037 #ifdef HAVE_MBSTOWCS
2038 size_t clen = strlen(text) + 1;
2039 wchar_t *cstr = malloc(sizeof(wchar_t) * clen);
2040 int text_count = mbstowcs(cstr, text, clen);
2041 if (text_count == -1)
2042 text_count = mbstowcs(cstr, "Enc-Err", 6);
2043 pdf_put_string_contents_wide(buf, cstr);
2044 #if 0
2045 if (*text == 'W') {
2046 fprintf(stderr, "Decoding utf8 for '%s'\n", text);
2047 wchar_t *p = cstr;
2048 char *pp = text;
2049 fprintf(stderr, "sz wc = %d\n", sizeof(wchar_t));
2050 while (*p) {
2051 fprintf(stderr, " %d = %c versus %d = %c\n", *p, (char)*p, 255 & (int)*pp, *pp);
2052 p++;
2053 pp++;
2054 }
2055 }
2056 #endif
2057 free(cstr);
2058 #else
2059 pdf_put_string_contents_wide(buf, text);
2060 #endif
2061 }
2063 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
2064 {
2065 pdf_init_buffer(state, buf);
2066 buf->id = ++state->last_obj_id;
2067 buf->is_obj = 1;
2068 buf->is_stream = 0;
2069 }
2071 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
2072 {
2073 pdf_init_object(state, buf);
2074 buf->is_dict = 1;
2075 }
2077 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
2078 gfx_color_t *current_color, const char *op)
2079 {
2080 #if USE_PDF_FAKE_ALPHA
2081 double a1, a2;
2082 #endif
2083 /* gfx_color_t is RRGGBBAA */
2084 if (*current_color == color)
2085 return;
2086 #if USE_PDF_FAKE_ALPHA
2087 a1 = (color & 255) / 255.0;
2088 a2 = 1 - a1;
2089 #define pdf_color_calc(x) ( ((x) & 255) / 255.0 * a1 + a2)
2090 #else
2091 #define pdf_color_calc(x) ( ((x) & 255) / 255.0)
2092 #endif
2093 pdf_putnumber(buf, pdf_color_calc(color >> 24));
2094 pdf_puts(buf, " ");
2095 pdf_putnumber(buf, pdf_color_calc(color >> 16));
2096 pdf_puts(buf, " ");
2097 pdf_putnumber(buf, pdf_color_calc(color >> 8));
2098 pdf_puts(buf, " ");
2099 pdf_puts(buf, op);
2100 pdf_puts(buf, "\n");
2101 *current_color = color;
2102 }
2104 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
2105 {
2106 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
2107 }
2109 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
2110 {
2111 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
2112 }
2114 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
2115 {
2116 const char *ps_font = afm_get_font_postscript_name(node->filename);
2117 pdf_font *ef;
2118 for (ef = state->font_list; ef; ef = ef->next) {
2119 if (!strcmp(ps_font, ef->ps_font))
2120 return ef;
2121 }
2122 return NULL;
2123 }
2125 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
2126 {
2127 pdf_font *ef = pdf_find_font(state, node);
2128 if (ef)
2129 return;
2130 ef = malloc(sizeof(pdf_font));
2131 if (ef == NULL) {
2132 rrd_set_error("malloc for pdf_font");
2133 state->has_failed = 1;
2134 return;
2135 }
2136 pdf_init_dict(state, &ef->obj);
2137 ef->next = state->font_list;
2138 ef->ps_font = afm_get_font_postscript_name(node->filename);
2139 state->font_list = ef;
2140 /* fonts dict */
2141 pdf_putsi(&state->fontsdict_obj, "/F");
2142 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2143 pdf_puts(&state->fontsdict_obj, " ");
2144 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2145 pdf_puts(&state->fontsdict_obj, " 0 R\n");
2146 /* fonts def */
2147 pdf_putsi(&ef->obj, "/Type /Font\n");
2148 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
2149 pdf_putsi(&ef->obj, "/Name /F");
2150 pdf_putint(&ef->obj, ef->obj.id);
2151 pdf_puts(&ef->obj, "\n");
2152 pdf_putsi(&ef->obj, "/BaseFont /");
2153 pdf_puts(&ef->obj, ef->ps_font);
2154 pdf_puts(&ef->obj, "\n");
2155 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
2156 /* 'Cp1252' (this is latin 1 extended with 27 characters;
2157 the encoding is also known as 'winansi')
2158 http://www.lowagie.com/iText/tutorial/ch09.html */
2159 }
2161 static void pdf_create_fonts(pdf_state *state)
2162 {
2163 gfx_node_t *node;
2164 for (node = state->canvas->firstnode; node; node = node->next) {
2165 if (node->type == GFX_TEXT)
2166 pdf_add_font(state, node);
2167 }
2168 }
2170 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
2171 {
2172 int i;
2173 pdf_buffer *s = &state->graph_stream;
2174 if (node->type == GFX_LINE) {
2175 svg_dash dash_info;
2176 svg_get_dash(node, &dash_info);
2177 if (!svg_dash_equal(&dash_info, &state->dash)) {
2178 state->dash = dash_info;
2179 if (dash_info.dash_enable) {
2180 pdf_puts(s, "[");
2181 pdf_putnumber(s, dash_info.adjusted_on);
2182 pdf_puts(s, " ");
2183 pdf_putnumber(s, dash_info.adjusted_off);
2184 pdf_puts(s, "] ");
2185 pdf_putnumber(s, dash_info.dash_offset);
2186 pdf_puts(s, " d\n");
2187 } else {
2188 pdf_puts(s, "[] 0 d\n");
2189 }
2190 }
2191 pdf_set_stroke_color(s, node->color);
2192 if (state->linecap != 1) {
2193 pdf_puts(s, "1 j\n");
2194 state->linecap = 1;
2195 }
2196 if (state->linejoin != 1) {
2197 pdf_puts(s, "1 J\n");
2198 state->linejoin = 1;
2199 }
2200 if (node->size != state->line_width) {
2201 state->line_width = node->size;
2202 pdf_putnumber(s, state->line_width);
2203 pdf_puts(s, " w\n");
2204 }
2205 } else {
2206 pdf_set_fill_color(s, node->color);
2207 }
2208 for (i = 0; i < node->points; i++) {
2209 ArtVpath *vec = node->path + i;
2210 double x = vec->x;
2211 double y = state->page_height - vec->y;
2212 if (node->type == GFX_AREA) {
2213 x += LINEOFFSET; /* adjust for libart handling of areas */
2214 y -= LINEOFFSET;
2215 }
2216 switch (vec->code) {
2217 case ART_MOVETO_OPEN: /* fall-through */
2218 case ART_MOVETO:
2219 pdf_putnumber(s, x);
2220 pdf_puts(s, " ");
2221 pdf_putnumber(s, y);
2222 pdf_puts(s, " m\n");
2223 break;
2224 case ART_LINETO:
2225 pdf_putnumber(s, x);
2226 pdf_puts(s, " ");
2227 pdf_putnumber(s, y);
2228 pdf_puts(s, " l\n");
2229 break;
2230 case ART_CURVETO: break; /* unsupported */
2231 case ART_END: break; /* nop */
2232 }
2233 }
2234 if (node->type == GFX_LINE) {
2235 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
2236 } else {
2237 pdf_puts(s, "f\n");
2238 }
2239 }
2242 static void pdf_write_matrix(pdf_state *state, gfx_node_t *node, pdf_coords *g, int useTM)
2243 {
2244 char tmp[150];
2245 pdf_buffer *s = &state->graph_stream;
2246 if (node->angle == 0) {
2247 pdf_puts(s, "1 0 0 1 ");
2248 pdf_putnumber(s, useTM ? g->tmx : g->mx);
2249 pdf_puts(s, " ");
2250 pdf_putnumber(s, useTM ? g->tmy : g->my);
2251 } else {
2252 /* can't use svg_write_number as 2 decimals is far from enough to avoid
2253 skewed text */
2254 sprintf(tmp, "%f %f %f %f %f %f",
2255 g->ma, g->mb, g->mc, g->md,
2256 useTM ? g->tmx : g->mx,
2257 useTM ? g->tmy : g->my);
2258 pdf_puts(s, tmp);
2259 }
2260 }
2262 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
2263 int last_was_text, int next_is_text)
2264 {
2265 pdf_coords g;
2266 pdf_buffer *s = &state->graph_stream;
2267 pdf_font *font = pdf_find_font(state, node);
2268 if (font == NULL) {
2269 rrd_set_error("font disappeared");
2270 state->has_failed = 1;
2271 return;
2272 }
2273 pdf_calc(state->page_height, node, &g);
2274 #if PDF_CALC_DEBUG
2275 pdf_puts(s, "q % debug green box\n");
2276 pdf_write_matrix(state, node, &g, 0);
2277 pdf_puts(s, " cm\n");
2278 pdf_set_fill_color(s, 0x90FF9000);
2279 pdf_puts(s, "0 0.4 0 rg\n");
2280 pdf_puts(s, "0 0 ");
2281 pdf_putnumber(s, g.sizep.x);
2282 pdf_puts(s, " ");
2283 pdf_putnumber(s, g.sizep.y);
2284 pdf_puts(s, " re\n");
2285 pdf_puts(s, "f\n");
2286 pdf_puts(s, "Q\n");
2287 #endif
2288 pdf_set_fill_color(s, node->color);
2289 if (PDF_CALC_DEBUG || !last_was_text)
2290 pdf_puts(s, "BT\n");
2291 if (state->font_id != font->obj.id || node->size != state->font_size) {
2292 state->font_id = font->obj.id;
2293 state->font_size = node->size;
2294 pdf_puts(s, "/F");
2295 pdf_putint(s, font->obj.id);
2296 pdf_puts(s, " ");
2297 pdf_putnumber(s, node->size);
2298 pdf_puts(s, " Tf\n");
2299 }
2300 pdf_write_matrix(state, node, &g, 1);
2301 pdf_puts(s, " Tm\n");
2302 pdf_puts(s, "(");
2303 pdf_put_string_contents(s, node->text);
2304 pdf_puts(s, ") Tj\n");
2305 if (PDF_CALC_DEBUG || !next_is_text)
2306 pdf_puts(s, "ET\n");
2307 }
2309 static void pdf_write_content(pdf_state *state)
2310 {
2311 gfx_node_t *node;
2312 int last_was_text = 0, next_is_text;
2313 for (node = state->canvas->firstnode; node; node = node->next) {
2314 switch (node->type) {
2315 case GFX_LINE:
2316 case GFX_AREA:
2317 pdf_write_linearea(state, node);
2318 break;
2319 case GFX_TEXT:
2320 next_is_text = node->next && node->next->type == GFX_TEXT;
2321 pdf_write_text(state, node, last_was_text, next_is_text);
2322 break;
2323 }
2324 last_was_text = node->type == GFX_TEXT;
2325 }
2326 }
2328 static void pdf_init_document(pdf_state *state)
2329 {
2330 pdf_init_buffer(state, &state->pdf_header);
2331 pdf_init_dict(state, &state->catalog_obj);
2332 pdf_init_dict(state, &state->info_obj);
2333 pdf_init_dict(state, &state->pages_obj);
2334 pdf_init_dict(state, &state->page1_obj);
2335 pdf_init_dict(state, &state->fontsdict_obj);
2336 pdf_create_fonts(state);
2337 if (state->has_failed)
2338 return;
2339 /* make stream last object in file */
2340 pdf_init_object(state, &state->graph_stream);
2341 state->graph_stream.is_stream = 1;
2342 }
2344 static void pdf_setup_document(pdf_state *state)
2345 {
2346 const char *creator = "RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch";
2347 /* all objects created by now, so init code can reference them */
2348 /* HEADER */
2349 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2350 /* following 8 bit comment is recommended by Adobe for
2351 indicating binary file to file transfer applications */
2352 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2353 /* INFO */
2354 pdf_putsi(&state->info_obj, "/Creator (");
2355 pdf_put_string_contents(&state->info_obj, creator);
2356 pdf_puts(&state->info_obj, ")\n");
2357 /* CATALOG */
2358 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2359 pdf_putsi(&state->catalog_obj, "/Pages ");
2360 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2361 pdf_puts(&state->catalog_obj, " 0 R\n");
2362 /* PAGES */
2363 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2364 pdf_putsi(&state->pages_obj, "/Kids [");
2365 pdf_putint(&state->pages_obj, state->page1_obj.id);
2366 pdf_puts(&state->pages_obj, " 0 R]\n");
2367 pdf_putsi(&state->pages_obj, "/Count 1\n");
2368 /* PAGE 1 */
2369 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2370 pdf_putsi(&state->page1_obj, "/Parent ");
2371 pdf_putint(&state->page1_obj, state->pages_obj.id);
2372 pdf_puts(&state->page1_obj, " 0 R\n");
2373 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2374 pdf_putint(&state->page1_obj, state->page_width);
2375 pdf_puts(&state->page1_obj, " ");
2376 pdf_putint(&state->page1_obj, state->page_height);
2377 pdf_puts(&state->page1_obj, "]\n");
2378 pdf_putsi(&state->page1_obj, "/Contents ");
2379 pdf_putint(&state->page1_obj, state->graph_stream.id);
2380 pdf_puts(&state->page1_obj, " 0 R\n");
2381 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2382 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2383 pdf_puts(&state->page1_obj, " 0 R >>\n");
2384 }
2386 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2387 {
2388 fputs(text, state->fp);
2389 state->pdf_file_pos += strlen(text);
2390 }
2392 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2393 {
2394 char tmp[40];
2395 buf->pdf_file_pos = state->pdf_file_pos;
2396 if (buf->is_obj) {
2397 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2398 pdf_write_string_to_file(state, tmp);
2399 }
2400 if (buf->is_dict)
2401 pdf_write_string_to_file(state, "<<\n");
2402 if (buf->is_stream) {
2403 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2404 pdf_write_string_to_file(state, tmp);
2405 pdf_write_string_to_file(state, "stream\n");
2406 }
2407 fwrite(buf->data, 1, buf->current_size, state->fp);
2408 state->pdf_file_pos += buf->current_size;
2409 if (buf->is_stream)
2410 pdf_write_string_to_file(state, "endstream\n");
2411 if (buf->is_dict)
2412 pdf_write_string_to_file(state, ">>\n");
2413 if (buf->is_obj)
2414 pdf_write_string_to_file(state, "endobj\n");
2415 }
2417 static void pdf_write_to_file(pdf_state *state)
2418 {
2419 pdf_buffer *buf = state->first_buffer;
2420 int xref_pos;
2421 state->pdf_file_pos = 0;
2422 pdf_write_buf_to_file(state, &state->pdf_header);
2423 while (buf) {
2424 if (buf->is_obj)
2425 pdf_write_buf_to_file(state, buf);
2426 buf = buf->next_buffer;
2427 }
2428 xref_pos = state->pdf_file_pos;
2429 fprintf(state->fp, "xref\n");
2430 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2431 /* TOC lines must be exactly 20 bytes including \n */
2432 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2433 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2434 if (buf->is_obj)
2435 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2436 }
2437 fprintf(state->fp, "trailer\n");
2438 fprintf(state->fp, "<<\n");
2439 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2440 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2441 fprintf(state->fp, "\t/Info %d 0 R\n", state->info_obj.id);
2442 fprintf(state->fp, ">>\n");
2443 fprintf(state->fp, "startxref\n");
2444 fprintf(state->fp, "%d\n", xref_pos);
2445 fputs("%%EOF\n", state->fp);
2446 }
2448 static void pdf_free_resources(pdf_state *state)
2449 {
2450 pdf_buffer *buf = state->first_buffer;
2451 while (buf) {
2452 free(buf->data);
2453 buf->data = NULL;
2454 buf->alloc_size = buf->current_size = 0;
2455 buf = buf->next_buffer;
2456 }
2457 while (state->font_list) {
2458 pdf_font *next = state->font_list->next;
2459 free(state->font_list);
2460 state->font_list = next;
2461 }
2462 }
2464 int gfx_render_pdf (gfx_canvas_t *canvas,
2465 art_u32 width, art_u32 height,
2466 gfx_color_t UNUSED(background), FILE *fp){
2467 struct pdf_state state;
2468 memset(&state, 0, sizeof(pdf_state));
2469 state.fp = fp;
2470 state.canvas = canvas;
2471 state.page_width = width;
2472 state.page_height = height;
2473 state.font_id = -1;
2474 state.font_size = -1;
2475 state.font_list = NULL;
2476 state.linecap = -1;
2477 state.linejoin = -1;
2478 pdf_init_document(&state);
2479 /*
2480 pdf_set_color(&state, background);
2481 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2482 height, width, height, width);
2483 */
2484 if (!state.has_failed)
2485 pdf_write_content(&state);
2486 if (!state.has_failed)
2487 pdf_setup_document(&state);
2488 if (!state.has_failed)
2489 pdf_write_to_file(&state);
2490 pdf_free_resources(&state);
2491 return state.has_failed ? -1 : 0;
2492 }