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(x,...) fprintf(stderr, x, ## __VA_ARGS__);
11 #else
12 # define DPRINTF(x,...)
13 #endif
14 #include "rrd_tool.h"
15 #include <png.h>
16 #include <ft2build.h>
17 #include FT_FREETYPE_H
18 #include FT_GLYPH_H
20 #include "rrd_gfx.h"
21 #include "rrd_afm.h"
22 #include "unused.h"
24 /* lines are better drawn on the pixle than between pixles */
25 #define LINEOFFSET 0.5
27 #define USE_PDF_FAKE_ALPHA 1
28 #define USE_EPS_FAKE_ALPHA 1
30 typedef struct gfx_char_s *gfx_char;
31 struct gfx_char_s {
32 FT_UInt index; /* glyph index */
33 FT_Vector pos; /* location from baseline in 26.6 */
34 FT_Glyph image; /* glyph bitmap */
35 };
37 typedef struct gfx_string_s *gfx_string;
38 struct gfx_string_s {
39 unsigned int width;
40 unsigned int height;
41 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];
419 gottab = 0;
420 if (letter == '\\' && n+1 < string->count && cstr[n+1] == 't'){
421 /* we have a tab here so skip the backslash and
422 set t to ' ' so that we get a white space */
423 gottab = 1;
424 n++;
425 letter = ' ';
426 }
427 if (letter == '\t'){
428 letter = ' ';
429 gottab = 1 ;
430 }
431 /* initialize each struct gfx_char_s */
432 glyph->index = 0;
433 glyph->pos.x = 0;
434 glyph->pos.y = 0;
435 glyph->image = NULL;
436 glyph->index = FT_Get_Char_Index( face, letter );
438 /* compute glyph origin */
439 if ( use_kerning && previous && glyph->index ) {
440 FT_Vector kerning;
441 FT_Get_Kerning (face, previous, glyph->index,
442 ft_kerning_default, &kerning);
443 ft_pen.x += kerning.x;
444 ft_pen.y += kerning.y;
445 }
447 /* load the glyph image (in its native format) */
448 /* for now, we take a monochrome glyph bitmap */
449 error = FT_Load_Glyph (face, glyph->index, size > canvas->font_aa_threshold ?
450 canvas->aa_type == AA_NORMAL ? FT_LOAD_TARGET_NORMAL :
451 canvas->aa_type == AA_LIGHT ? FT_LOAD_TARGET_LIGHT :
452 FT_LOAD_TARGET_MONO : FT_LOAD_TARGET_MONO);
453 if (error) {
454 DPRINTF("couldn't load glyph: %c\n", letter)
455 continue;
456 }
457 error = FT_Get_Glyph (slot, &glyph->image);
458 if (error) {
459 DPRINTF("couldn't get glyph %c from slot %d\n", letter, (int)slot)
460 continue;
461 }
462 /* if we are in tabbing mode, we replace the tab with a space and shift the position
463 of the space so that its left edge is where the tab was supposed to land us */
464 if (gottab){
465 /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
466 ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
467 }
468 /* store current pen position */
469 glyph->pos.x = ft_pen.x;
470 glyph->pos.y = ft_pen.y;
473 ft_pen.x += slot->advance.x;
474 ft_pen.y += slot->advance.y;
476 /* rotate glyph */
477 vec = glyph->pos;
478 FT_Vector_Transform (&vec, &string->transform);
479 error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
480 if (error) {
481 DPRINTF("couldn't transform glyph id %d\n", letter)
482 continue;
483 }
485 /* convert to a bitmap - destroy native image */
486 error = FT_Glyph_To_Bitmap (&glyph->image, size > canvas->font_aa_threshold ?
487 canvas->aa_type == AA_NORMAL ? FT_RENDER_MODE_NORMAL :
488 canvas->aa_type == AA_LIGHT ? FT_RENDER_MODE_LIGHT :
489 FT_RENDER_MODE_MONO : FT_RENDER_MODE_MONO, 0, 1);
490 if (error) {
491 DPRINTF("couldn't convert glyph id %d to bitmap\n", letter)
492 continue;
493 }
495 /* increment number of glyphs */
496 previous = glyph->index;
497 string->num_glyphs++;
498 }
499 free(cstr);
500 /* printf ("number of glyphs = %d\n", string->num_glyphs);*/
501 compute_string_bbox( string );
502 /* the last character was a tab */
503 /* if (gottab) { */
504 string->width = ft_pen.x;
505 /* } else {
506 string->width = string->bbox.xMax - string->bbox.xMin;
507 } */
508 string->height = string->bbox.yMax - string->bbox.yMin;
509 return string;
510 }
513 static int gfx_save_png (art_u8 *buffer, FILE *fp,
514 long width, long height, long bytes_per_pixel);
515 /* render grafics into png image */
517 int gfx_render_png (gfx_canvas_t *canvas,
518 art_u32 width, art_u32 height,
519 gfx_color_t background, FILE *fp){
522 FT_Library library;
523 gfx_node_t *node = canvas->firstnode;
524 /*
525 art_u8 red = background >> 24, green = (background >> 16) & 0xff;
526 art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
527 */
528 unsigned long pys_width = width * canvas->zoom;
529 unsigned long pys_height = height * canvas->zoom;
530 const int bytes_per_pixel = 4;
531 unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
533 /* fill that buffer with out background color */
534 gfx_color_t *buffp = art_new (gfx_color_t, pys_width*pys_height);
535 art_u8 *buffer = (art_u8 *)buffp;
536 unsigned long i;
537 for (i=0;i<pys_width*pys_height;
538 i++){
539 *(buffp++)=background;
540 }
541 FT_Init_FreeType( &library );
542 while(node){
543 switch (node->type) {
544 case GFX_LINE:
545 case GFX_AREA: {
546 ArtVpath *vec;
547 double dst[6];
548 ArtSVP *svp;
549 art_affine_scale(dst,canvas->zoom,canvas->zoom);
550 vec = art_vpath_affine_transform(node->path,dst);
551 if (node->closed_path)
552 gfx_libart_close_path(node, &vec);
553 /* gfx_round_scaled_coordinates(vec); */
554 /* pvec = art_vpath_perturb(vec);
555 art_free(vec); */
556 if(node->type == GFX_LINE){
557 svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
558 ART_PATH_STROKE_CAP_ROUND,
559 node->size*canvas->zoom,4,0.25);
560 } else {
561 svp = art_svp_from_vpath ( vec );
562 /* this takes time and is unnecessary since we make
563 sure elsewhere that the areas are going clock-whise */
564 /* svpt = art_svp_uncross( svp );
565 art_svp_free(svp);
566 svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO);
567 art_svp_free(svpt);
568 */
569 }
570 art_free(vec);
571 /* this is from gnome since libart does not have this yet */
572 gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
573 node->color, buffer, rowstride, NULL);
574 art_svp_free(svp);
575 break;
576 }
577 case GFX_TEXT: {
578 unsigned int n;
579 int error;
580 art_u8 fcolor[4],falpha;
581 FT_Face face;
582 gfx_char glyph;
583 gfx_string string;
584 FT_Vector vec; /* 26.6 */
586 float pen_x = 0.0 , pen_y = 0.0;
587 /* double x,y; */
588 long ix,iy;
590 fcolor[0] = node->color >> 24;
591 fcolor[1] = (node->color >> 16) & 0xff;
592 fcolor[2] = (node->color >> 8) & 0xff;
593 falpha = node->color & 0xff;
594 error = FT_New_Face( library,
595 (char *)node->filename,
596 0,
597 &face );
598 if ( error ) {
599 rrd_set_error("failed to load %s",node->filename);
600 break;
601 }
602 error = FT_Set_Char_Size(face, /* handle to face object */
603 (long)(node->size*64),
604 (long)(node->size*64),
605 (long)(100*canvas->zoom),
606 (long)(100*canvas->zoom));
607 if ( error ) break;
608 pen_x = node->x * canvas->zoom;
609 pen_y = node->y * canvas->zoom;
611 string = gfx_string_create (canvas, face, node->text, node->angle, node->tabwidth, node->size);
612 switch(node->halign){
613 case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
614 break;
615 case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
616 -string->bbox.xMax/2:-string->bbox.xMin/2;
617 break;
618 case GFX_H_LEFT: vec.x = -string->bbox.xMin;
619 break;
620 case GFX_H_NULL: vec.x = 0;
621 break;
622 }
624 switch(node->valign){
625 case GFX_V_TOP: vec.y = string->bbox.yMax;
626 break;
627 case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
628 string->bbox.yMax/2:string->bbox.yMin/2;
629 break;
630 case GFX_V_BOTTOM: vec.y = 0;
631 break;
632 case GFX_V_NULL: vec.y = 0;
633 break;
634 }
635 pen_x += vec.x/64;
636 pen_y += vec.y/64;
637 glyph = string->glyphs;
638 for(n=0; n<string->num_glyphs; n++, glyph++) {
639 int gr;
640 FT_Glyph image;
641 FT_BitmapGlyph bit;
642 /* long buf_x,comp_n; */
643 /* make copy to transform */
644 if (! glyph->image) {
645 DPRINTF("no image\n")
646 continue;
647 }
648 error = FT_Glyph_Copy (glyph->image, &image);
649 if (error) {
650 DPRINTF("couldn't copy image\n")
651 continue;
652 }
654 /* transform it */
655 vec = glyph->pos;
656 FT_Vector_Transform (&vec, &string->transform);
658 bit = (FT_BitmapGlyph) image;
659 gr = bit->bitmap.num_grays -1;
660 /*
661 buf_x = (pen_x + 0.5) + (double)bit->left;
662 comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
663 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
664 buf_x *= bytes_per_pixel ;
665 for (iy=0; iy < bit->bitmap.rows; iy++){
666 long buf_y = iy+(pen_y+0.5)-(double)bit->top;
667 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
668 buf_y *= rowstride;
669 for (ix=0;ix < bit->bitmap.width;ix++){
670 *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
671 }
672 art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
673 }
674 art_free(letter);
675 */
676 switch ( bit->bitmap.pixel_mode ) {
677 case FT_PIXEL_MODE_GRAY:
678 for (iy=0; iy < bit->bitmap.rows; iy++){
679 long buf_y = iy+(pen_y+0.5)-bit->top;
680 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
681 buf_y *= rowstride;
682 for (ix=0;ix < bit->bitmap.width;ix++){
683 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
684 art_u8 font_alpha;
686 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
687 buf_x *= bytes_per_pixel ;
688 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix);
689 if (font_alpha > 0){
690 fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
691 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
692 }
693 }
694 }
695 break;
697 case FT_PIXEL_MODE_MONO:
698 for (iy=0; iy < bit->bitmap.rows; iy++){
699 long buf_y = iy+(pen_y+0.5)-bit->top;
700 if (buf_y < 0 || buf_y >= (long)pys_height) continue;
701 buf_y *= rowstride;
702 for (ix=0;ix < bit->bitmap.width;ix++){
703 long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
705 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
706 buf_x *= bytes_per_pixel ;
707 if ( (fcolor[3] = falpha * ((*(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix/8) >> (7 - (ix % 8))) & 1)) > 0 )
708 art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
709 }
710 }
711 break;
713 default:
714 rrd_set_error("unknown freetype pixel mode: %d", bit->bitmap.pixel_mode);
715 break;
716 }
718 /*
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 ;
725 art_u8 font_alpha;
727 if (buf_x < 0 || buf_x >= (long)pys_width) continue;
728 buf_x *= bytes_per_pixel ;
729 font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
730 font_alpha = (art_u8)((double)font_alpha / gr * falpha);
731 for (iz = 0; iz < 3; iz++){
732 art_u8 *orig = buffer + buf_y + buf_x + iz;
733 *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) +
734 (double)fcolor[iz] / gr * (font_alpha));
735 }
736 }
737 }
738 */
739 FT_Done_Glyph (image);
740 }
741 gfx_string_destroy(string);
742 }
743 }
744 node = node->next;
745 }
746 gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel);
747 art_free(buffer);
748 FT_Done_FreeType( library );
749 return 0;
750 }
752 /* free memory used by nodes this will also remove memory required for
753 associated paths and svcs ... but not for text strings */
754 int
755 gfx_destroy (gfx_canvas_t *canvas){
756 gfx_node_t *next,*node = canvas->firstnode;
757 while(node){
758 next = node->next;
759 art_free(node->path);
760 free(node->text);
761 free(node->filename);
762 art_free(node);
763 node = next;
764 }
765 art_free(canvas);
766 return 0;
767 }
769 static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){
770 png_structp png_ptr = NULL;
771 png_infop info_ptr = NULL;
772 int i;
773 png_bytep *row_pointers;
774 int rowstride = width * bytes_per_pixel;
775 png_text text[2];
777 if (fp == NULL)
778 return (1);
780 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
781 if (png_ptr == NULL)
782 {
783 return (1);
784 }
785 row_pointers = (png_bytepp)png_malloc(png_ptr,
786 height*sizeof(png_bytep));
788 info_ptr = png_create_info_struct(png_ptr);
790 if (info_ptr == NULL)
791 {
792 png_free(png_ptr,row_pointers);
793 png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
794 return (1);
795 }
797 if (setjmp(png_jmpbuf(png_ptr)))
798 {
799 /* If we get here, we had a problem writing the file */
800 png_destroy_write_struct(&png_ptr, &info_ptr);
801 return (1);
802 }
804 png_init_io(png_ptr, fp);
805 png_set_IHDR (png_ptr, info_ptr,width, height,
806 8, PNG_COLOR_TYPE_RGB_ALPHA,
807 PNG_INTERLACE_NONE,
808 PNG_COMPRESSION_TYPE_DEFAULT,
809 PNG_FILTER_TYPE_DEFAULT);
811 text[0].key = "Software";
812 text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
813 text[0].compression = PNG_TEXT_COMPRESSION_NONE;
814 png_set_text (png_ptr, info_ptr, text, 1);
816 /* lets make this fast while ending up with some increass in image size */
817 png_set_filter(png_ptr,0,PNG_FILTER_NONE);
818 /* png_set_filter(png_ptr,0,PNG_FILTER_SUB); */
819 png_set_compression_level(png_ptr,1);
820 /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
821 /*
822 png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
823 png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
824 png_set_compression_level(png_ptr,Z_BEST_SPEED); */
826 /* Write header data */
827 png_write_info (png_ptr, info_ptr);
828 for (i = 0; i < height; i++)
829 row_pointers[i] = (png_bytep) (buffer + i*rowstride);
831 png_write_image(png_ptr, row_pointers);
832 png_write_end(png_ptr, info_ptr);
833 png_free(png_ptr,row_pointers);
834 png_destroy_write_struct(&png_ptr, &info_ptr);
835 return 1;
836 }
839 /* ----- COMMON ROUTINES for pdf, svg and eps */
840 #define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
841 #define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
843 #define PDF_CALC_DEBUG 0
845 typedef struct pdf_point
846 {
847 double x, y;
848 } pdf_point;
850 typedef struct
851 {
852 double ascender, descender, baselineY;
853 pdf_point sizep, minp, maxp;
854 double x, y, tdx, tdy;
855 double r, cos_r, sin_r;
856 double ma, mb, mc, md, mx, my; /* pdf coord matrix */
857 double tmx, tmy; /* last 2 coords of text coord matrix */
858 #if PDF_CALC_DEBUG
859 int debug;
860 #endif
861 } pdf_coords;
863 #if PDF_CALC_DEBUG
864 static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
865 {
866 fprintf(stderr, "PDF CALC =============================\n");
867 fprintf(stderr, " '%s' at %f pt\n", node->text, node->size);
868 fprintf(stderr, " align h = %s, v = %s, sizep = %f, %f\n",
869 (node->halign == GFX_H_RIGHT ? "r" :
870 (node->halign == GFX_H_CENTER ? "c" :
871 (node->halign == GFX_H_LEFT ? "l" : "N"))),
872 (node->valign == GFX_V_TOP ? "t" :
873 (node->valign == GFX_V_CENTER ? "c" :
874 (node->valign == GFX_V_BOTTOM ? "b" : "N"))),
875 g->sizep.x, g->sizep.y);
876 fprintf(stderr, " r = %f = %f, cos = %f, sin = %f\n",
877 g->r, node->angle, g->cos_r, g->sin_r);
878 fprintf(stderr, " ascender = %f, descender = %f, baselineY = %f\n",
879 g->ascender, g->descender, g->baselineY);
880 fprintf(stderr, " sizep: %f, %f\n", g->sizep.x, g->sizep.y);
881 fprintf(stderr, " minp: %f, %f maxp = %f, %f\n",
882 g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
883 fprintf(stderr, " x = %f, y = %f\n", g->x, g->y);
884 fprintf(stderr, " tdx = %f, tdy = %f\n", g->tdx, g->tdy);
885 fprintf(stderr, " GM = %f, %f, %f, %f, %f, %f\n",
886 g->ma, g->mb, g->mc, g->md, g->mx, g->my);
887 fprintf(stderr, " TM = %f, %f, %f, %f, %f, %f\n",
888 g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
889 }
890 #endif
892 #if PDF_CALC_DEBUG
893 #define PDF_DD(x) if (g->debug) x;
894 #else
895 #define PDF_DD(x)
896 #endif
898 static void pdf_rotate(pdf_coords *g, pdf_point *p)
899 {
900 double x2 = g->cos_r * p->x - g->sin_r * p->y;
901 double y2 = g->sin_r * p->x + g->cos_r * p->y;
902 PDF_DD( fprintf(stderr, " rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
903 p->x = x2;
904 p->y = y2;
905 }
908 static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
909 {
910 pdf_point a, b, c;
911 #if PDF_CALC_DEBUG
912 /* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
913 g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
914 #endif
915 g->x = node->x;
916 g->y = page_height - node->y;
917 if (node->angle) {
918 g->r = 2 * M_PI * node->angle / 360.0;
919 g->cos_r = cos(g->r);
920 g->sin_r = sin(g->r);
921 } else {
922 g->r = 0;
923 g->cos_r = 1;
924 g->sin_r = 0;
925 }
926 g->ascender = afm_get_ascender(node->filename, node->size);
927 g->descender = afm_get_descender(node->filename, node->size);
928 g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
929 /* seems like libart ignores the descender when doing vertial-align = bottom,
930 so we do that too, to get labels v-aligning properly */
931 g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
932 g->baselineY = -g->ascender - g->sizep.y / 2;
933 a.x = g->sizep.x; a.y = g->sizep.y;
934 b.x = g->sizep.x; b.y = 0;
935 c.x = 0; c.y = g->sizep.y;
936 if (node->angle) {
937 pdf_rotate(g, &a);
938 pdf_rotate(g, &b);
939 pdf_rotate(g, &c);
940 }
941 g->minp.x = min3(a.x, b.x, c.x);
942 g->minp.y = min3(a.y, b.y, c.y);
943 g->maxp.x = max3(a.x, b.x, c.x);
944 g->maxp.y = max3(a.y, b.y, c.y);
945 /* The alignment parameters in node->valign and node->halign
946 specifies the alignment in the non-rotated coordinate system
947 (very unlike pdf/postscript), which complicates matters.
948 */
949 switch (node->halign) {
950 case GFX_H_RIGHT: g->tdx = -g->maxp.x; break;
951 case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
952 case GFX_H_LEFT: g->tdx = -g->minp.x; break;
953 case GFX_H_NULL: g->tdx = 0; break;
954 }
955 switch(node->valign){
956 case GFX_V_TOP: g->tdy = -g->maxp.y; break;
957 case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
958 case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
959 case GFX_V_NULL: g->tdy = 0; break;
960 }
961 g->ma = g->cos_r;
962 g->mb = g->sin_r;
963 g->mc = -g->sin_r;
964 g->md = g->cos_r;
965 g->mx = g->x + g->tdx;
966 g->my = g->y + g->tdy;
967 g->tmx = g->mx - g->ascender * g->mc;
968 g->tmy = g->my - g->ascender * g->md;
969 PDF_DD(pdf_dump_calc(node, g))
970 }
972 /* ------- SVG -------
973 SVG reference:
974 http://www.w3.org/TR/SVG/
975 */
976 static int svg_indent = 0;
977 static int svg_single_line = 0;
978 static const char *svg_default_font = "-dummy-";
979 typedef struct svg_dash
980 {
981 int dash_enable;
982 double dash_adjust, dash_len, dash_offset;
983 double adjusted_on, adjusted_off;
984 } svg_dash;
987 static void svg_print_indent(FILE *fp)
988 {
989 int i;
990 for (i = svg_indent - svg_single_line; i > 0; i--) {
991 putc(' ', fp);
992 putc(' ', fp);
993 }
994 }
996 static void svg_start_tag(FILE *fp, const char *name)
997 {
998 svg_print_indent(fp);
999 putc('<', fp);
1000 fputs(name, fp);
1001 svg_indent++;
1002 }
1004 static void svg_close_tag_single_line(FILE *fp)
1005 {
1006 svg_single_line++;
1007 putc('>', fp);
1008 }
1010 static void svg_close_tag(FILE *fp)
1011 {
1012 putc('>', fp);
1013 if (!svg_single_line)
1014 putc('\n', fp);
1015 }
1017 static void svg_end_tag(FILE *fp, const char *name)
1018 {
1019 /* name is NULL if closing empty-node tag */
1020 svg_indent--;
1021 if (svg_single_line)
1022 svg_single_line--;
1023 else if (name)
1024 svg_print_indent(fp);
1025 if (name != NULL) {
1026 fputs("</", fp);
1027 fputs(name, fp);
1028 } else {
1029 putc('/', fp);
1030 }
1031 svg_close_tag(fp);
1032 }
1034 static void svg_close_tag_empty_node(FILE *fp)
1035 {
1036 svg_end_tag(fp, NULL);
1037 }
1039 static void svg_write_text(FILE *fp, const char *text)
1040 {
1041 const unsigned char *p, *start, *last;
1042 unsigned int ch;
1043 p = (const unsigned char*)text;
1044 if (!p)
1045 return;
1046 /* trim leading spaces */
1047 while (*p == ' ')
1048 p++;
1049 start = p;
1050 /* trim trailing spaces */
1051 last = p - 1;
1052 while ((ch = *p) != 0) {
1053 if (ch != ' ')
1054 last = p;
1055 p++;
1056 }
1057 /* encode trimmed text */
1058 p = start;
1059 while (p <= last) {
1060 ch = *p++;
1061 ch = afm_host2unicode(ch); /* unsafe macro */
1062 switch (ch) {
1063 case '&': fputs("&", fp); break;
1064 case '<': fputs("<", fp); break;
1065 case '>': fputs(">", fp); break;
1066 case '"': fputs(""", fp); break;
1067 default:
1068 if (ch >= 127)
1069 fprintf(fp, "&#%d;", ch);
1070 else
1071 putc(ch, fp);
1072 }
1073 }
1074 }
1076 static void svg_format_number(char *buf, int bufsize, double d)
1077 {
1078 /* omit decimals if integer to reduce filesize */
1079 char *p;
1080 snprintf(buf, bufsize, "%.2f", d);
1081 p = buf; /* doesn't trust snprintf return value */
1082 while (*p)
1083 p++;
1084 while (--p > buf) {
1085 char ch = *p;
1086 if (ch == '0') {
1087 *p = '\0'; /* zap trailing zeros */
1088 continue;
1089 }
1090 if (ch == '.')
1091 *p = '\0'; /* zap trailing dot */
1092 break;
1093 }
1094 }
1096 static void svg_write_number(FILE *fp, double d)
1097 {
1098 char buf[60];
1099 svg_format_number(buf, sizeof(buf), d);
1100 fputs(buf, fp);
1101 }
1103 static int svg_color_is_black(int c)
1104 {
1105 /* gfx_color_t is RRGGBBAA */
1106 return c == 0x000000FF;
1107 }
1109 static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
1110 {
1111 /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
1112 gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
1113 gfx_color_t opacity = c & 0xFF;
1114 fprintf(fp, " %s=\"", attr);
1115 if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
1116 /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
1117 fprintf(fp, "#%03lX",
1118 ( ((rrggbb >> 8) & 0xF00)
1119 | ((rrggbb >> 4) & 0x0F0)
1120 | ( rrggbb & 0x00F)));
1121 } else {
1122 fprintf(fp, "#%06lX", rrggbb);
1123 }
1124 fputs("\"", fp);
1125 if (opacity != 0xFF) {
1126 fprintf(fp, " opacity=\"");
1127 svg_write_number(fp, opacity / 255.0);
1128 fputs("\"", fp);
1129 }
1130 }
1132 static void svg_get_dash(gfx_node_t *node, svg_dash *d)
1133 {
1134 double offset;
1135 int mult;
1136 if (node->dash_on <= 0 || node->dash_off <= 0) {
1137 d->dash_enable = 0;
1138 return;
1139 }
1140 d->dash_enable = 1;
1141 d->dash_len = node->dash_on + node->dash_off;
1142 /* dash on/off adjustment due to round caps */
1143 d->dash_adjust = 0.8 * node->size;
1144 d->adjusted_on = node->dash_on - d->dash_adjust;
1145 if (d->adjusted_on < 0.01)
1146 d->adjusted_on = 0.01;
1147 d->adjusted_off = d->dash_len - d->adjusted_on;
1148 /* dash offset calc */
1149 if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
1150 offset = node->path[0].y;
1151 else
1152 offset = node->path[0].x;
1153 mult = (int)fabs(offset / d->dash_len);
1154 d->dash_offset = offset - mult * d->dash_len;
1155 if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
1156 d->dash_offset = d->dash_len - d->dash_offset;
1157 }
1159 static int svg_dash_equal(svg_dash *a, svg_dash *b)
1160 {
1161 if (a->dash_enable != b->dash_enable)
1162 return 0;
1163 if (a->adjusted_on != b->adjusted_on)
1164 return 0;
1165 if (a->adjusted_off != b->adjusted_off)
1166 return 0;
1167 /* rest of properties will be the same when on+off are */
1168 return 1;
1169 }
1171 static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
1172 {
1173 svg_dash dash_info;
1174 svg_get_dash(node, &dash_info);
1175 fputs(" stroke-width=\"", fp);
1176 svg_write_number(fp, node->size);
1177 fputs("\"", fp);
1178 svg_write_color(fp, node->color, "stroke");
1179 fputs(" fill=\"none\"", fp);
1180 if (dash_info.dash_enable) {
1181 if (dash_info.dash_offset != 0) {
1182 fputs(" stroke-dashoffset=\"", fp);
1183 svg_write_number(fp, dash_info.dash_offset);
1184 fputs("\"", fp);
1185 }
1186 fputs(" stroke-dasharray=\"", fp);
1187 svg_write_number(fp, dash_info.adjusted_on);
1188 fputs(",", fp);
1189 svg_write_number(fp, dash_info.adjusted_off);
1190 fputs("\"", fp);
1191 }
1192 }
1194 static int svg_is_int_step(double a, double b)
1195 {
1196 double diff = fabs(a - b);
1197 return floor(diff) == diff;
1198 }
1200 static int svg_path_straight_segment(FILE *fp,
1201 double lastA, double currentA, double currentB,
1202 gfx_node_t *node,
1203 int segment_idx, int isx, char absChar, char relChar)
1204 {
1205 if (!svg_is_int_step(lastA, currentA)) {
1206 putc(absChar, fp);
1207 svg_write_number(fp, currentA);
1208 return 0;
1209 }
1210 if (segment_idx < node->points - 1) {
1211 ArtVpath *vec = node->path + segment_idx + 1;
1212 if (vec->code == ART_LINETO) {
1213 double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
1214 double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
1215 if (nextB == currentB
1216 && ((currentA >= lastA) == (nextA >= currentA))
1217 && svg_is_int_step(currentA, nextA)) {
1218 return 1; /* skip to next as it is a straight line */
1219 }
1220 }
1221 }
1222 putc(relChar, fp);
1223 svg_write_number(fp, currentA - lastA);
1224 return 0;
1225 }
1227 static void svg_path(FILE *fp, gfx_node_t *node, int multi)
1228 {
1229 int i;
1230 double lastX = 0, lastY = 0;
1231 /* for straight lines <path..> tags take less space than
1232 <line..> tags because of the efficient packing
1233 in the 'd' attribute */
1234 svg_start_tag(fp, "path");
1235 if (!multi)
1236 svg_common_path_attributes(fp, node);
1237 fputs(" d=\"", fp);
1238 /* specification of the 'd' attribute: */
1239 /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
1240 for (i = 0; i < node->points; i++) {
1241 ArtVpath *vec = node->path + i;
1242 double x = vec->x - LINEOFFSET;
1243 double y = vec->y - LINEOFFSET;
1244 switch (vec->code) {
1245 case ART_MOVETO_OPEN: /* fall-through */
1246 case ART_MOVETO:
1247 putc('M', fp);
1248 svg_write_number(fp, x);
1249 putc(',', fp);
1250 svg_write_number(fp, y);
1251 break;
1252 case ART_LINETO:
1253 /* try optimize filesize by using minimal lineto commands */
1254 /* without introducing rounding errors. */
1255 if (x == lastX) {
1256 if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
1257 continue;
1258 } else if (y == lastY) {
1259 if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
1260 continue;
1261 } else {
1262 putc('L', fp);
1263 svg_write_number(fp, x);
1264 putc(',', fp);
1265 svg_write_number(fp, y);
1266 }
1267 break;
1268 case ART_CURVETO: break; /* unsupported */
1269 case ART_END: break; /* nop */
1270 }
1271 lastX = x;
1272 lastY = y;
1273 }
1274 if (node->closed_path)
1275 fputs(" Z", fp);
1276 fputs("\"", fp);
1277 svg_close_tag_empty_node(fp);
1278 }
1280 static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
1281 {
1282 /* optimize for multiple paths with the same color, penwidth, etc. */
1283 int num = 1;
1284 gfx_node_t *node = *nodeR;
1285 gfx_node_t *next = node->next;
1286 while (next) {
1287 if (next->type != node->type
1288 || next->size != node->size
1289 || next->color != node->color
1290 || next->dash_on != node->dash_on
1291 || next->dash_off != node->dash_off)
1292 break;
1293 next = next->next;
1294 num++;
1295 }
1296 if (num == 1) {
1297 svg_path(fp, node, 0);
1298 return;
1299 }
1300 svg_start_tag(fp, "g");
1301 svg_common_path_attributes(fp, node);
1302 svg_close_tag(fp);
1303 while (num && node) {
1304 svg_path(fp, node, 1);
1305 if (!--num)
1306 break;
1307 node = node->next;
1308 *nodeR = node;
1309 }
1310 svg_end_tag(fp, "g");
1311 }
1313 static void svg_area(FILE *fp, gfx_node_t *node)
1314 {
1315 int i;
1316 double startX = 0, startY = 0;
1317 svg_start_tag(fp, "polygon");
1318 fputs(" ", fp);
1319 svg_write_color(fp, node->color, "fill");
1320 fputs(" points=\"", fp);
1321 for (i = 0; i < node->points; i++) {
1322 ArtVpath *vec = node->path + i;
1323 double x = vec->x - LINEOFFSET;
1324 double y = vec->y - LINEOFFSET;
1325 switch (vec->code) {
1326 case ART_MOVETO_OPEN: /* fall-through */
1327 case ART_MOVETO:
1328 svg_write_number(fp, x);
1329 putc(',', fp);
1330 svg_write_number(fp, y);
1331 startX = x;
1332 startY = y;
1333 break;
1334 case ART_LINETO:
1335 if (i == node->points - 2
1336 && node->path[i + 1].code == ART_END
1337 && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
1338 break; /* poly area always closed, no need for last point */
1339 }
1340 putc(' ', fp);
1341 svg_write_number(fp, x);
1342 putc(',', fp);
1343 svg_write_number(fp, y);
1344 break;
1345 case ART_CURVETO: break; /* unsupported */
1346 case ART_END: break; /* nop */
1347 }
1348 }
1349 fputs("\"", fp);
1350 svg_close_tag_empty_node(fp);
1351 }
1353 static void svg_text(FILE *fp, gfx_node_t *node)
1354 {
1355 pdf_coords g;
1356 const char *fontname;
1357 /* as svg has 0,0 in top-left corner (like most screens) instead of
1358 bottom-left corner like pdf and eps, we have to fake the coords
1359 using offset and inverse sin(r) value */
1360 int page_height = 1000;
1361 pdf_calc(page_height, node, &g);
1362 if (node->angle != 0) {
1363 svg_start_tag(fp, "g");
1364 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1365 skewed text */
1366 fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
1367 g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
1368 svg_close_tag(fp);
1369 }
1370 svg_start_tag(fp, "text");
1371 if (!node->angle) {
1372 fputs(" x=\"", fp);
1373 svg_write_number(fp, g.tmx);
1374 fputs("\" y=\"", fp);
1375 svg_write_number(fp, page_height - g.tmy);
1376 fputs("\"", fp);
1377 }
1378 fontname = afm_get_font_name(node->filename);
1379 if (strcmp(fontname, svg_default_font))
1380 fprintf(fp, " font-family=\"%s\"", fontname);
1381 fputs(" font-size=\"", fp);
1382 svg_write_number(fp, node->size);
1383 fputs("\"", fp);
1384 if (!svg_color_is_black(node->color))
1385 svg_write_color(fp, node->color, "fill");
1386 svg_close_tag_single_line(fp);
1387 /* support for node->tabwidth missing */
1388 svg_write_text(fp, node->text);
1389 svg_end_tag(fp, "text");
1390 if (node->angle != 0)
1391 svg_end_tag(fp, "g");
1392 }
1394 int gfx_render_svg (gfx_canvas_t *canvas,
1395 art_u32 width, art_u32 height,
1396 gfx_color_t background, FILE *fp){
1397 gfx_node_t *node = canvas->firstnode;
1398 /* Find the first font used, and assume it is the mostly used
1399 one. It reduces the number of font-familty attributes. */
1400 while (node) {
1401 if (node->type == GFX_TEXT && node->filename) {
1402 svg_default_font = afm_get_font_name(node->filename);
1403 break;
1404 }
1405 node = node->next;
1406 }
1407 fputs(
1408 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
1409 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
1410 " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
1411 "<!--\n"
1412 " SVG file created by\n"
1413 " RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1414 "\n"
1415 " The width/height attributes in the outhermost svg node\n"
1416 " are just default sizes for the browser which is used\n"
1417 " if the svg file is openened directly without being\n"
1418 " embedded in an html file.\n"
1419 " The viewBox is the local coord system for rrdtool.\n"
1420 "-->\n", fp);
1421 svg_start_tag(fp, "svg");
1422 fputs(" width=\"", fp);
1423 svg_write_number(fp, width * canvas->zoom);
1424 fputs("\" height=\"", fp);
1425 svg_write_number(fp, height * canvas->zoom);
1426 fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
1427 svg_write_number(fp, -LINEOFFSET);
1428 fputs(" ", fp);
1429 svg_write_number(fp, -LINEOFFSET);
1430 fputs(" ", fp);
1431 svg_write_number(fp, width - LINEOFFSET);
1432 fputs(" ", fp);
1433 svg_write_number(fp, height - LINEOFFSET);
1434 fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
1435 fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
1436 fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
1437 svg_close_tag(fp);
1438 svg_start_tag(fp, "rect");
1439 fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
1440 svg_write_color(fp, background, "fill");
1441 svg_close_tag_empty_node(fp);
1442 node = canvas->firstnode;
1443 while (node) {
1444 switch (node->type) {
1445 case GFX_LINE:
1446 svg_multi_path(fp, &node);
1447 break;
1448 case GFX_AREA:
1449 svg_area(fp, node);
1450 break;
1451 case GFX_TEXT:
1452 svg_text(fp, node);
1453 }
1454 node = node->next;
1455 }
1456 svg_end_tag(fp, "svg");
1457 return 0;
1458 }
1460 /* ------- EPS -------
1461 EPS and Postscript references:
1462 http://partners.adobe.com/asn/developer/technotes/postscript.html
1463 */
1465 typedef struct eps_font
1466 {
1467 const char *ps_font;
1468 int id;
1469 struct eps_font *next;
1470 } eps_font;
1472 typedef struct eps_state
1473 {
1474 FILE *fp;
1475 gfx_canvas_t *canvas;
1476 art_u32 page_width, page_height;
1477 eps_font *font_list;
1478 /*--*/
1479 gfx_color_t color;
1480 const char *font;
1481 double font_size;
1482 double line_width;
1483 int linecap, linejoin;
1484 int has_dash;
1485 } eps_state;
1487 static void eps_set_color(eps_state *state, gfx_color_t color)
1488 {
1489 #if USE_EPS_FAKE_ALPHA
1490 double a1, a2;
1491 #endif
1492 /* gfx_color_t is RRGGBBAA */
1493 if (state->color == color)
1494 return;
1495 #if USE_EPS_FAKE_ALPHA
1496 a1 = (color & 255) / 255.0;
1497 a2 = 255 * (1 - a1);
1498 #define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
1499 #else
1500 #define eps_color_calc(x) (int)( (x) & 255)
1501 #endif
1502 /* gfx_color_t is RRGGBBAA */
1503 if (state->color == color)
1504 return;
1505 fprintf(state->fp, "%d %d %d Rgb\n",
1506 eps_color_calc(color >> 24),
1507 eps_color_calc(color >> 16),
1508 eps_color_calc(color >> 8));
1509 state->color = color;
1510 }
1512 static int eps_add_font(eps_state *state, gfx_node_t *node)
1513 {
1514 /* The fonts list could be postponed to the end using
1515 (atend), but let's be nice and have them in the header. */
1516 const char *ps_font = afm_get_font_postscript_name(node->filename);
1517 eps_font *ef;
1518 for (ef = state->font_list; ef; ef = ef->next) {
1519 if (!strcmp(ps_font, ef->ps_font))
1520 return 0;
1521 }
1522 ef = malloc(sizeof(eps_font));
1523 if (ef == NULL) {
1524 rrd_set_error("malloc for eps_font");
1525 return -1;
1526 }
1527 ef->next = state->font_list;
1528 ef->ps_font = ps_font;
1529 state->font_list = ef;
1530 return 0;
1531 }
1533 static void eps_list_fonts(eps_state *state, const char *dscName)
1534 {
1535 eps_font *ef;
1536 int lineLen = strlen(dscName);
1537 if (!state->font_list)
1538 return;
1539 fputs(dscName, state->fp);
1540 for (ef = state->font_list; ef; ef = ef->next) {
1541 int nameLen = strlen(ef->ps_font);
1542 if (lineLen + nameLen > 100 && lineLen) {
1543 fputs("\n", state->fp);
1544 fputs("%%- \n", state->fp);
1545 lineLen = 5;
1546 } else {
1547 fputs(" ", state->fp);
1548 lineLen++;
1549 }
1550 fputs(ef->ps_font, state->fp);
1551 lineLen += nameLen;
1552 }
1553 fputs("\n", state->fp);
1554 }
1556 static void eps_define_fonts(eps_state *state)
1557 {
1558 eps_font *ef;
1559 if (!state->font_list)
1560 return;
1561 for (ef = state->font_list; ef; ef = ef->next) {
1562 /* PostScript¨ LANGUAGE REFERENCE third edition
1563 page 349 */
1564 fprintf(state->fp,
1565 "%%\n"
1566 "/%s findfont dup length dict begin\n"
1567 "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
1568 "/Encoding ISOLatin1Encoding def\n"
1569 "currentdict end\n"
1570 "/%s-ISOLatin1 exch definefont pop\n"
1571 "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
1572 ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
1573 }
1574 }
1576 static int eps_prologue(eps_state *state)
1577 {
1578 gfx_node_t *node;
1579 fputs(
1580 "%!PS-Adobe-3.0 EPSF-3.0\n"
1581 "%%Creator: RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch\n"
1582 /* can't like weird chars here */
1583 "%%Title: (RRDtool output)\n"
1584 "%%DocumentData: Clean7Bit\n"
1585 "", state->fp);
1586 fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
1587 state->page_width, state->page_height);
1588 for (node = state->canvas->firstnode; node; node = node->next) {
1589 if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
1590 return -1;
1591 }
1592 eps_list_fonts(state, "%%DocumentFonts:");
1593 eps_list_fonts(state, "%%DocumentNeededFonts:");
1594 fputs(
1595 "%%EndComments\n"
1596 "%%BeginProlog\n"
1597 "%%EndProlog\n" /* must have, or BoundingBox is ignored */
1598 "/bd { bind def } bind def\n"
1599 "", state->fp);
1600 fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
1601 fputs(
1602 "/X2 {X exch X exch} bd\n"
1603 "/M {X2 moveto} bd\n"
1604 "/L {X2 lineto} bd\n"
1605 "/m {moveto} bd\n"
1606 "/l {lineto} bd\n"
1607 "/S {stroke} bd\n"
1608 "/CP {closepath} bd\n"
1609 "/WS {setlinewidth stroke} bd\n"
1610 "/F {fill} bd\n"
1611 "/T1 {gsave} bd\n"
1612 "/T2 {concat 0 0 moveto show grestore} bd\n"
1613 "/T {moveto show} bd\n"
1614 "/Rgb { 255.0 div 3 1 roll\n"
1615 " 255.0 div 3 1 roll \n"
1616 " 255.0 div 3 1 roll setrgbcolor } bd\n"
1617 "", state->fp);
1618 eps_define_fonts(state);
1619 return 0;
1620 }
1622 static void eps_clear_dash(eps_state *state)
1623 {
1624 if (!state->has_dash)
1625 return;
1626 state->has_dash = 0;
1627 fputs("[1 0] 0 setdash\n", state->fp);
1628 }
1630 static void eps_write_linearea(eps_state *state, gfx_node_t *node)
1631 {
1632 int i;
1633 FILE *fp = state->fp;
1634 int useOffset = 0;
1635 int clearDashIfAny = 1;
1636 eps_set_color(state, node->color);
1637 if (node->type == GFX_LINE) {
1638 svg_dash dash_info;
1639 if (state->linecap != 1) {
1640 fputs("1 setlinecap\n", fp);
1641 state->linecap = 1;
1642 }
1643 if (state->linejoin != 1) {
1644 fputs("1 setlinejoin\n", fp);
1645 state->linejoin = 1;
1646 }
1647 svg_get_dash(node, &dash_info);
1648 if (dash_info.dash_enable) {
1649 clearDashIfAny = 0;
1650 state->has_dash = 1;
1651 fputs("[", fp);
1652 svg_write_number(fp, dash_info.adjusted_on);
1653 fputs(" ", fp);
1654 svg_write_number(fp, dash_info.adjusted_off);
1655 fputs("] ", fp);
1656 svg_write_number(fp, dash_info.dash_offset);
1657 fputs(" setdash\n", fp);
1658 }
1659 }
1660 if (clearDashIfAny)
1661 eps_clear_dash(state);
1662 for (i = 0; i < node->points; i++) {
1663 ArtVpath *vec = node->path + i;
1664 double x = vec->x;
1665 double y = state->page_height - vec->y;
1666 if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
1667 useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
1668 if (useOffset) {
1669 x -= LINEOFFSET;
1670 y -= LINEOFFSET;
1671 }
1672 switch (vec->code) {
1673 case ART_MOVETO_OPEN: /* fall-through */
1674 case ART_MOVETO:
1675 svg_write_number(fp, x);
1676 fputc(' ', fp);
1677 svg_write_number(fp, y);
1678 fputc(' ', fp);
1679 fputs(useOffset ? "M\n" : "m\n", fp);
1680 break;
1681 case ART_LINETO:
1682 svg_write_number(fp, x);
1683 fputc(' ', fp);
1684 svg_write_number(fp, y);
1685 fputc(' ', fp);
1686 fputs(useOffset ? "L\n" : "l\n", fp);
1687 break;
1688 case ART_CURVETO: break; /* unsupported */
1689 case ART_END: break; /* nop */
1690 }
1691 }
1692 if (node->type == GFX_LINE) {
1693 if (node->closed_path)
1694 fputs("CP ", fp);
1695 if (node->size != state->line_width) {
1696 state->line_width = node->size;
1697 svg_write_number(fp, state->line_width);
1698 fputs(" WS\n", fp);
1699 } else {
1700 fputs("S\n", fp);
1701 }
1702 } else {
1703 fputs("F\n", fp);
1704 }
1705 }
1707 static void eps_write_text(eps_state *state, gfx_node_t *node)
1708 {
1709 FILE *fp = state->fp;
1710 const char *p;
1711 const char *ps_font = afm_get_font_postscript_name(node->filename);
1712 int lineLen = 0;
1713 pdf_coords g;
1714 pdf_calc(state->page_height, node, &g);
1715 eps_set_color(state, node->color);
1716 if (strcmp(ps_font, state->font) || node->size != state->font_size) {
1717 state->font = ps_font;
1718 state->font_size = node->size;
1719 svg_write_number(fp, state->font_size);
1720 fprintf(fp, " SetFont-%s\n", state->font);
1721 }
1722 if (node->angle)
1723 fputs("T1 ", fp);
1724 fputs("(", fp);
1725 lineLen = 20;
1726 p = node->text;
1727 while (1) {
1728 unsigned char ch = *(unsigned char*)p;
1729 if (!ch)
1730 break;
1731 if (++lineLen > 70) {
1732 fputs("\\\n", fp); /* backslash and \n */
1733 lineLen = 0;
1734 }
1735 switch (ch) {
1736 case '%':
1737 case '(':
1738 case ')':
1739 case '\\':
1740 fputc('\\', fp);
1741 fputc(ch, fp);
1742 break;
1743 case '\n':
1744 fputs("\\n", fp);
1745 break;
1746 case '\r':
1747 fputs("\\r", fp);
1748 break;
1749 case '\t':
1750 fputs("\\t", fp);
1751 break;
1752 default:
1753 if (ch >= 126 || ch < 32) {
1754 fprintf(fp, "\\%03o", ch);
1755 lineLen += 3;
1756 } else {
1757 fputc(ch, fp);
1758 }
1759 }
1760 p++;
1761 }
1762 if (node->angle) {
1763 /* can't use svg_write_number as 2 decimals is far from enough to avoid
1764 skewed text */
1765 fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
1766 g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
1767 } else {
1768 fputs(") ", fp);
1769 svg_write_number(fp, g.tmx);
1770 fputs(" ", fp);
1771 svg_write_number(fp, g.tmy);
1772 fputs(" T\n", fp);
1773 }
1774 }
1776 static int eps_write_content(eps_state *state)
1777 {
1778 gfx_node_t *node;
1779 fputs("%\n", state->fp);
1780 for (node = state->canvas->firstnode; node; node = node->next) {
1781 switch (node->type) {
1782 case GFX_LINE:
1783 case GFX_AREA:
1784 eps_write_linearea(state, node);
1785 break;
1786 case GFX_TEXT:
1787 eps_write_text(state, node);
1788 break;
1789 }
1790 }
1791 return 0;
1792 }
1794 int gfx_render_eps (gfx_canvas_t *canvas,
1795 art_u32 width, art_u32 height,
1796 gfx_color_t background, FILE *fp){
1797 struct eps_state state;
1798 state.fp = fp;
1799 state.canvas = canvas;
1800 state.page_width = width;
1801 state.page_height = height;
1802 state.font = "no-default-font";
1803 state.font_size = -1;
1804 state.color = 0; /* black */
1805 state.font_list = NULL;
1806 state.linecap = -1;
1807 state.linejoin = -1;
1808 state.has_dash = 0;
1809 state.line_width = 1;
1810 if (eps_prologue(&state) == -1)
1811 return -1;
1812 eps_set_color(&state, background);
1813 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
1814 height, width, height, width);
1815 if (eps_write_content(&state) == -1)
1816 return 0;
1817 fputs("showpage\n", fp);
1818 fputs("%%EOF\n", fp);
1819 while (state.font_list) {
1820 eps_font *next = state.font_list->next;
1821 free(state.font_list);
1822 state.font_list = next;
1823 }
1824 return 0;
1825 }
1827 /* ------- PDF -------
1828 PDF references page:
1829 http://partners.adobe.com/public/developer/pdf/index_reference.html
1830 */
1832 typedef struct pdf_buffer
1833 {
1834 int id, is_obj, is_dict, is_stream, pdf_file_pos;
1835 char *data;
1836 int alloc_size, current_size;
1837 struct pdf_buffer *previous_buffer, *next_buffer;
1838 struct pdf_state *state;
1839 } pdf_buffer;
1841 typedef struct pdf_font
1842 {
1843 const char *ps_font;
1844 pdf_buffer obj;
1845 struct pdf_font *next;
1846 } pdf_font;
1848 typedef struct pdf_state
1849 {
1850 FILE *fp;
1851 gfx_canvas_t *canvas;
1852 art_u32 page_width, page_height;
1853 pdf_font *font_list;
1854 pdf_buffer *first_buffer, *last_buffer;
1855 int pdf_file_pos;
1856 int has_failed;
1857 /*--*/
1858 gfx_color_t stroke_color, fill_color;
1859 int font_id;
1860 double font_size;
1861 double line_width;
1862 svg_dash dash;
1863 int linecap, linejoin;
1864 int last_obj_id;
1865 /*--*/
1866 pdf_buffer pdf_header;
1867 pdf_buffer info_obj, catalog_obj, pages_obj, page1_obj;
1868 pdf_buffer fontsdict_obj;
1869 pdf_buffer graph_stream;
1870 } pdf_state;
1872 static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
1873 {
1874 int initial_size = 32;
1875 buf->state = state;
1876 buf->id = -42;
1877 buf->alloc_size = 0;
1878 buf->current_size = 0;
1879 buf->data = (char*)malloc(initial_size);
1880 buf->is_obj = 0;
1881 buf->previous_buffer = NULL;
1882 buf->next_buffer = NULL;
1883 if (buf->data == NULL) {
1884 rrd_set_error("malloc for pdf_buffer data");
1885 state->has_failed = 1;
1886 return;
1887 }
1888 buf->alloc_size = initial_size;
1889 if (state->last_buffer)
1890 state->last_buffer->next_buffer = buf;
1891 if (state->first_buffer == NULL)
1892 state->first_buffer = buf;
1893 buf->previous_buffer = state->last_buffer;
1894 state->last_buffer = buf;
1895 }
1897 static void pdf_put(pdf_buffer *buf, const char *text, int len)
1898 {
1899 if (len <= 0)
1900 return;
1901 if (buf->alloc_size < buf->current_size + len) {
1902 int new_size = buf->alloc_size;
1903 char *new_buf;
1904 while (new_size < buf->current_size + len)
1905 new_size *= 4;
1906 new_buf = (char*)malloc(new_size);
1907 if (new_buf == NULL) {
1908 rrd_set_error("re-malloc for pdf_buffer data");
1909 buf->state->has_failed = 1;
1910 return;
1911 }
1912 memcpy(new_buf, buf->data, buf->current_size);
1913 free(buf->data);
1914 buf->data = new_buf;
1915 buf->alloc_size = new_size;
1916 }
1917 memcpy(buf->data + buf->current_size, text, len);
1918 buf->current_size += len;
1919 }
1921 static void pdf_puts(pdf_buffer *buf, const char *text)
1922 {
1923 pdf_put(buf, text, strlen(text));
1924 }
1926 static void pdf_indent(pdf_buffer *buf)
1927 {
1928 pdf_puts(buf, "\t");
1929 }
1931 static void pdf_putsi(pdf_buffer *buf, const char *text)
1932 {
1933 pdf_indent(buf);
1934 pdf_puts(buf, text);
1935 }
1937 static void pdf_putint(pdf_buffer *buf, int i)
1938 {
1939 char tmp[20];
1940 sprintf(tmp, "%d", i);
1941 pdf_puts(buf, tmp);
1942 }
1944 static void pdf_putnumber(pdf_buffer *buf, double d)
1945 {
1946 char tmp[50];
1947 svg_format_number(tmp, sizeof(tmp), d);
1948 pdf_puts(buf, tmp);
1949 }
1951 static void pdf_put_string_contents(pdf_buffer *buf, const char *text)
1952 {
1953 const char *p = text;
1954 while (1) {
1955 unsigned char ch = *(unsigned char*)p;
1956 switch (ch) {
1957 case 0: return;
1958 case '(':
1959 case ')':
1960 case '\\':
1961 pdf_puts(buf, "\\");
1962 pdf_put(buf, p, 1);
1963 break;
1964 case '\n':
1965 pdf_puts(buf, "\\n");
1966 break;
1967 case '\r':
1968 pdf_puts(buf, "\\r");
1969 break;
1970 case '\t':
1971 pdf_puts(buf, "\\t");
1972 break;
1973 default:
1974 if (ch >= 126 || ch < 32) {
1975 char tmp[10];
1976 snprintf(tmp, sizeof(tmp), "\\%03o", ch);
1977 pdf_puts(buf, tmp);
1978 } else {
1979 pdf_put(buf, p, 1);
1980 }
1981 }
1982 p++;
1983 }
1984 }
1986 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
1987 {
1988 pdf_init_buffer(state, buf);
1989 buf->id = ++state->last_obj_id;
1990 buf->is_obj = 1;
1991 buf->is_stream = 0;
1992 }
1994 static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
1995 {
1996 pdf_init_object(state, buf);
1997 buf->is_dict = 1;
1998 }
2000 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
2001 gfx_color_t *current_color, const char *op)
2002 {
2003 #if USE_PDF_FAKE_ALPHA
2004 double a1, a2;
2005 #endif
2006 /* gfx_color_t is RRGGBBAA */
2007 if (*current_color == color)
2008 return;
2009 #if USE_PDF_FAKE_ALPHA
2010 a1 = (color & 255) / 255.0;
2011 a2 = 1 - a1;
2012 #define pdf_color_calc(x) ( ((x) & 255) / 255.0 * a1 + a2)
2013 #else
2014 #define pdf_color_calc(x) ( ((x) & 255) / 255.0)
2015 #endif
2016 pdf_putnumber(buf, pdf_color_calc(color >> 24));
2017 pdf_puts(buf, " ");
2018 pdf_putnumber(buf, pdf_color_calc(color >> 16));
2019 pdf_puts(buf, " ");
2020 pdf_putnumber(buf, pdf_color_calc(color >> 8));
2021 pdf_puts(buf, " ");
2022 pdf_puts(buf, op);
2023 pdf_puts(buf, "\n");
2024 *current_color = color;
2025 }
2027 static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
2028 {
2029 pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
2030 }
2032 static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
2033 {
2034 pdf_set_color(buf, color, &buf->state->fill_color, "rg");
2035 }
2037 static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
2038 {
2039 const char *ps_font = afm_get_font_postscript_name(node->filename);
2040 pdf_font *ef;
2041 for (ef = state->font_list; ef; ef = ef->next) {
2042 if (!strcmp(ps_font, ef->ps_font))
2043 return ef;
2044 }
2045 return NULL;
2046 }
2048 static void pdf_add_font(pdf_state *state, gfx_node_t *node)
2049 {
2050 pdf_font *ef = pdf_find_font(state, node);
2051 if (ef)
2052 return;
2053 ef = malloc(sizeof(pdf_font));
2054 if (ef == NULL) {
2055 rrd_set_error("malloc for pdf_font");
2056 state->has_failed = 1;
2057 return;
2058 }
2059 pdf_init_dict(state, &ef->obj);
2060 ef->next = state->font_list;
2061 ef->ps_font = afm_get_font_postscript_name(node->filename);
2062 state->font_list = ef;
2063 /* fonts dict */
2064 pdf_putsi(&state->fontsdict_obj, "/F");
2065 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2066 pdf_puts(&state->fontsdict_obj, " ");
2067 pdf_putint(&state->fontsdict_obj, ef->obj.id);
2068 pdf_puts(&state->fontsdict_obj, " 0 R\n");
2069 /* fonts def */
2070 pdf_putsi(&ef->obj, "/Type /Font\n");
2071 pdf_putsi(&ef->obj, "/Subtype /Type1\n");
2072 pdf_putsi(&ef->obj, "/Name /F");
2073 pdf_putint(&ef->obj, ef->obj.id);
2074 pdf_puts(&ef->obj, "\n");
2075 pdf_putsi(&ef->obj, "/BaseFont /");
2076 pdf_puts(&ef->obj, ef->ps_font);
2077 pdf_puts(&ef->obj, "\n");
2078 pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
2079 /* 'Cp1252' (this is latin 1 extended with 27 characters;
2080 the encoding is also known as 'winansi')
2081 http://www.lowagie.com/iText/tutorial/ch09.html */
2082 }
2084 static void pdf_create_fonts(pdf_state *state)
2085 {
2086 gfx_node_t *node;
2087 for (node = state->canvas->firstnode; node; node = node->next) {
2088 if (node->type == GFX_TEXT)
2089 pdf_add_font(state, node);
2090 }
2091 }
2093 static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
2094 {
2095 int i;
2096 pdf_buffer *s = &state->graph_stream;
2097 if (node->type == GFX_LINE) {
2098 svg_dash dash_info;
2099 svg_get_dash(node, &dash_info);
2100 if (!svg_dash_equal(&dash_info, &state->dash)) {
2101 state->dash = dash_info;
2102 if (dash_info.dash_enable) {
2103 pdf_puts(s, "[");
2104 pdf_putnumber(s, dash_info.adjusted_on);
2105 pdf_puts(s, " ");
2106 pdf_putnumber(s, dash_info.adjusted_off);
2107 pdf_puts(s, "] ");
2108 pdf_putnumber(s, dash_info.dash_offset);
2109 pdf_puts(s, " d\n");
2110 } else {
2111 pdf_puts(s, "[] 0 d\n");
2112 }
2113 }
2114 pdf_set_stroke_color(s, node->color);
2115 if (state->linecap != 1) {
2116 pdf_puts(s, "1 j\n");
2117 state->linecap = 1;
2118 }
2119 if (state->linejoin != 1) {
2120 pdf_puts(s, "1 J\n");
2121 state->linejoin = 1;
2122 }
2123 if (node->size != state->line_width) {
2124 state->line_width = node->size;
2125 pdf_putnumber(s, state->line_width);
2126 pdf_puts(s, " w\n");
2127 }
2128 } else {
2129 pdf_set_fill_color(s, node->color);
2130 }
2131 for (i = 0; i < node->points; i++) {
2132 ArtVpath *vec = node->path + i;
2133 double x = vec->x;
2134 double y = state->page_height - vec->y;
2135 if (node->type == GFX_AREA) {
2136 x += LINEOFFSET; /* adjust for libart handling of areas */
2137 y -= LINEOFFSET;
2138 }
2139 switch (vec->code) {
2140 case ART_MOVETO_OPEN: /* fall-through */
2141 case ART_MOVETO:
2142 pdf_putnumber(s, x);
2143 pdf_puts(s, " ");
2144 pdf_putnumber(s, y);
2145 pdf_puts(s, " m\n");
2146 break;
2147 case ART_LINETO:
2148 pdf_putnumber(s, x);
2149 pdf_puts(s, " ");
2150 pdf_putnumber(s, y);
2151 pdf_puts(s, " l\n");
2152 break;
2153 case ART_CURVETO: break; /* unsupported */
2154 case ART_END: break; /* nop */
2155 }
2156 }
2157 if (node->type == GFX_LINE) {
2158 pdf_puts(s, node->closed_path ? "s\n" : "S\n");
2159 } else {
2160 pdf_puts(s, "f\n");
2161 }
2162 }
2165 static void pdf_write_matrix(pdf_state *state, gfx_node_t *node, pdf_coords *g, int useTM)
2166 {
2167 char tmp[150];
2168 pdf_buffer *s = &state->graph_stream;
2169 if (node->angle == 0) {
2170 pdf_puts(s, "1 0 0 1 ");
2171 pdf_putnumber(s, useTM ? g->tmx : g->mx);
2172 pdf_puts(s, " ");
2173 pdf_putnumber(s, useTM ? g->tmy : g->my);
2174 } else {
2175 /* can't use svg_write_number as 2 decimals is far from enough to avoid
2176 skewed text */
2177 sprintf(tmp, "%f %f %f %f %f %f",
2178 g->ma, g->mb, g->mc, g->md,
2179 useTM ? g->tmx : g->mx,
2180 useTM ? g->tmy : g->my);
2181 pdf_puts(s, tmp);
2182 }
2183 }
2185 static void pdf_write_text(pdf_state *state, gfx_node_t *node,
2186 int last_was_text, int next_is_text)
2187 {
2188 pdf_coords g;
2189 pdf_buffer *s = &state->graph_stream;
2190 pdf_font *font = pdf_find_font(state, node);
2191 if (font == NULL) {
2192 rrd_set_error("font disappeared");
2193 state->has_failed = 1;
2194 return;
2195 }
2196 pdf_calc(state->page_height, node, &g);
2197 #if PDF_CALC_DEBUG
2198 pdf_puts(s, "q % debug green box\n");
2199 pdf_write_matrix(state, node, &g, 0);
2200 pdf_puts(s, " cm\n");
2201 pdf_set_fill_color(s, 0x90FF9000);
2202 pdf_puts(s, "0 0.4 0 rg\n");
2203 pdf_puts(s, "0 0 ");
2204 pdf_putnumber(s, g.sizep.x);
2205 pdf_puts(s, " ");
2206 pdf_putnumber(s, g.sizep.y);
2207 pdf_puts(s, " re\n");
2208 pdf_puts(s, "f\n");
2209 pdf_puts(s, "Q\n");
2210 #endif
2211 pdf_set_fill_color(s, node->color);
2212 if (PDF_CALC_DEBUG || !last_was_text)
2213 pdf_puts(s, "BT\n");
2214 if (state->font_id != font->obj.id || node->size != state->font_size) {
2215 state->font_id = font->obj.id;
2216 state->font_size = node->size;
2217 pdf_puts(s, "/F");
2218 pdf_putint(s, font->obj.id);
2219 pdf_puts(s, " ");
2220 pdf_putnumber(s, node->size);
2221 pdf_puts(s, " Tf\n");
2222 }
2223 pdf_write_matrix(state, node, &g, 1);
2224 pdf_puts(s, " Tm\n");
2225 pdf_puts(s, "(");
2226 pdf_put_string_contents(s, node->text);
2227 pdf_puts(s, ") Tj\n");
2228 if (PDF_CALC_DEBUG || !next_is_text)
2229 pdf_puts(s, "ET\n");
2230 }
2232 static void pdf_write_content(pdf_state *state)
2233 {
2234 gfx_node_t *node;
2235 int last_was_text = 0, next_is_text;
2236 for (node = state->canvas->firstnode; node; node = node->next) {
2237 switch (node->type) {
2238 case GFX_LINE:
2239 case GFX_AREA:
2240 pdf_write_linearea(state, node);
2241 break;
2242 case GFX_TEXT:
2243 next_is_text = node->next && node->next->type == GFX_TEXT;
2244 pdf_write_text(state, node, last_was_text, next_is_text);
2245 break;
2246 }
2247 last_was_text = node->type == GFX_TEXT;
2248 }
2249 }
2251 static void pdf_init_document(pdf_state *state)
2252 {
2253 pdf_init_buffer(state, &state->pdf_header);
2254 pdf_init_dict(state, &state->catalog_obj);
2255 pdf_init_dict(state, &state->info_obj);
2256 pdf_init_dict(state, &state->pages_obj);
2257 pdf_init_dict(state, &state->page1_obj);
2258 pdf_init_dict(state, &state->fontsdict_obj);
2259 pdf_create_fonts(state);
2260 if (state->has_failed)
2261 return;
2262 /* make stream last object in file */
2263 pdf_init_object(state, &state->graph_stream);
2264 state->graph_stream.is_stream = 1;
2265 }
2267 static void pdf_setup_document(pdf_state *state)
2268 {
2269 const char *creator = "RRDtool " PACKAGE_VERSION " Tobias Oetiker, http://tobi.oetiker.ch";
2270 /* all objects created by now, so init code can reference them */
2271 /* HEADER */
2272 pdf_puts(&state->pdf_header, "%PDF-1.3\n");
2273 /* following 8 bit comment is recommended by Adobe for
2274 indicating binary file to file transfer applications */
2275 pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
2276 /* INFO */
2277 pdf_putsi(&state->info_obj, "/Creator (");
2278 pdf_put_string_contents(&state->info_obj, creator);
2279 pdf_puts(&state->info_obj, ")\n");
2280 /* CATALOG */
2281 pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
2282 pdf_putsi(&state->catalog_obj, "/Pages ");
2283 pdf_putint(&state->catalog_obj, state->pages_obj.id);
2284 pdf_puts(&state->catalog_obj, " 0 R\n");
2285 /* PAGES */
2286 pdf_putsi(&state->pages_obj, "/Type /Pages\n");
2287 pdf_putsi(&state->pages_obj, "/Kids [");
2288 pdf_putint(&state->pages_obj, state->page1_obj.id);
2289 pdf_puts(&state->pages_obj, " 0 R]\n");
2290 pdf_putsi(&state->pages_obj, "/Count 1\n");
2291 /* PAGE 1 */
2292 pdf_putsi(&state->page1_obj, "/Type /Page\n");
2293 pdf_putsi(&state->page1_obj, "/Parent ");
2294 pdf_putint(&state->page1_obj, state->pages_obj.id);
2295 pdf_puts(&state->page1_obj, " 0 R\n");
2296 pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
2297 pdf_putint(&state->page1_obj, state->page_width);
2298 pdf_puts(&state->page1_obj, " ");
2299 pdf_putint(&state->page1_obj, state->page_height);
2300 pdf_puts(&state->page1_obj, "]\n");
2301 pdf_putsi(&state->page1_obj, "/Contents ");
2302 pdf_putint(&state->page1_obj, state->graph_stream.id);
2303 pdf_puts(&state->page1_obj, " 0 R\n");
2304 pdf_putsi(&state->page1_obj, "/Resources << /Font ");
2305 pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
2306 pdf_puts(&state->page1_obj, " 0 R >>\n");
2307 }
2309 static void pdf_write_string_to_file(pdf_state *state, const char *text)
2310 {
2311 fputs(text, state->fp);
2312 state->pdf_file_pos += strlen(text);
2313 }
2315 static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
2316 {
2317 char tmp[40];
2318 buf->pdf_file_pos = state->pdf_file_pos;
2319 if (buf->is_obj) {
2320 snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
2321 pdf_write_string_to_file(state, tmp);
2322 }
2323 if (buf->is_dict)
2324 pdf_write_string_to_file(state, "<<\n");
2325 if (buf->is_stream) {
2326 snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
2327 pdf_write_string_to_file(state, tmp);
2328 pdf_write_string_to_file(state, "stream\n");
2329 }
2330 fwrite(buf->data, 1, buf->current_size, state->fp);
2331 state->pdf_file_pos += buf->current_size;
2332 if (buf->is_stream)
2333 pdf_write_string_to_file(state, "endstream\n");
2334 if (buf->is_dict)
2335 pdf_write_string_to_file(state, ">>\n");
2336 if (buf->is_obj)
2337 pdf_write_string_to_file(state, "endobj\n");
2338 }
2340 static void pdf_write_to_file(pdf_state *state)
2341 {
2342 pdf_buffer *buf = state->first_buffer;
2343 int xref_pos;
2344 state->pdf_file_pos = 0;
2345 pdf_write_buf_to_file(state, &state->pdf_header);
2346 while (buf) {
2347 if (buf->is_obj)
2348 pdf_write_buf_to_file(state, buf);
2349 buf = buf->next_buffer;
2350 }
2351 xref_pos = state->pdf_file_pos;
2352 fprintf(state->fp, "xref\n");
2353 fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
2354 /* TOC lines must be exactly 20 bytes including \n */
2355 fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
2356 for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
2357 if (buf->is_obj)
2358 fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
2359 }
2360 fprintf(state->fp, "trailer\n");
2361 fprintf(state->fp, "<<\n");
2362 fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
2363 fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
2364 fprintf(state->fp, "\t/Info %d 0 R\n", state->info_obj.id);
2365 fprintf(state->fp, ">>\n");
2366 fprintf(state->fp, "startxref\n");
2367 fprintf(state->fp, "%d\n", xref_pos);
2368 fputs("%%EOF\n", state->fp);
2369 }
2371 static void pdf_free_resources(pdf_state *state)
2372 {
2373 pdf_buffer *buf = state->first_buffer;
2374 while (buf) {
2375 free(buf->data);
2376 buf->data = NULL;
2377 buf->alloc_size = buf->current_size = 0;
2378 buf = buf->next_buffer;
2379 }
2380 while (state->font_list) {
2381 pdf_font *next = state->font_list->next;
2382 free(state->font_list);
2383 state->font_list = next;
2384 }
2385 }
2387 int gfx_render_pdf (gfx_canvas_t *canvas,
2388 art_u32 width, art_u32 height,
2389 gfx_color_t UNUSED(background), FILE *fp){
2390 struct pdf_state state;
2391 memset(&state, 0, sizeof(pdf_state));
2392 state.fp = fp;
2393 state.canvas = canvas;
2394 state.page_width = width;
2395 state.page_height = height;
2396 state.font_id = -1;
2397 state.font_size = -1;
2398 state.font_list = NULL;
2399 state.linecap = -1;
2400 state.linejoin = -1;
2401 pdf_init_document(&state);
2402 /*
2403 pdf_set_color(&state, background);
2404 fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
2405 height, width, height, width);
2406 */
2407 if (!state.has_failed)
2408 pdf_write_content(&state);
2409 if (!state.has_failed)
2410 pdf_setup_document(&state);
2411 if (!state.has_failed)
2412 pdf_write_to_file(&state);
2413 pdf_free_resources(&state);
2414 return state.has_failed ? -1 : 0;
2415 }