1
2 /********************************************/
3 /* gd interface to freetype library */
4 /* */
5 /* John Ellson ellson@graphviz.org */
6 /********************************************/
7
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <string.h>
11 #include <math.h>
12 #include "gd.h"
13 #include "gdhelpers.h"
14
15 #ifndef MSWIN32
16 #include <unistd.h>
17 #else
18 #include <io.h>
19 #ifndef R_OK
20 # define R_OK 04 /* Needed in Windows */
21 #endif
22 #endif
23
24 #ifdef WIN32
25 #define access _access
26 #ifndef R_OK
27 #define R_OK 2
28 #endif
29 #endif
30
31 /* number of antialised colors for indexed bitmaps */
32 /* overwrite Windows GDI define in case of windows build */
33 #ifdef NUMCOLORS
34 #undef NUMCOLORS
35 #endif
36 #define NUMCOLORS 8
37
38 char *
gdImageStringTTF(gdImage * im,int * brect,int fg,char * fontlist,double ptsize,double angle,int x,int y,char * string)39 gdImageStringTTF (gdImage * im, int *brect, int fg, char *fontlist,
40 double ptsize, double angle, int x, int y, char *string)
41 {
42 /* 2.0.6: valid return */
43 return gdImageStringFT (im, brect, fg, fontlist, ptsize, angle, x, y, string);
44 }
45
46 #ifndef HAVE_LIBFREETYPE
47 char *
gdImageStringFTEx(gdImage * im,int * brect,int fg,char * fontlist,double ptsize,double angle,int x,int y,char * string,gdFTStringExtraPtr strex)48 gdImageStringFTEx (gdImage * im, int *brect, int fg, char *fontlist,
49 double ptsize, double angle, int x, int y, char *string,
50 gdFTStringExtraPtr strex)
51 {
52 return "libgd was not built with FreeType font support\n";
53 }
54
55 char *
gdImageStringFT(gdImage * im,int * brect,int fg,char * fontlist,double ptsize,double angle,int x,int y,char * string)56 gdImageStringFT (gdImage * im, int *brect, int fg, char *fontlist,
57 double ptsize, double angle, int x, int y, char *string)
58 {
59 return "libgd was not built with FreeType font support\n";
60 }
61 #else
62
63 #include "gdcache.h"
64 #include <ft2build.h>
65 #include FT_FREETYPE_H
66 #include FT_GLYPH_H
67
68 /* number of fonts cached before least recently used is replaced */
69 #define FONTCACHESIZE 6
70
71 /* number of antialias color lookups cached */
72 #define TWEENCOLORCACHESIZE 32
73
74 /*
75 * Line separation as a factor of font height.
76 * No space between if LINESPACE = 1.00
77 * Line separation will be rounded up to next pixel row.
78 */
79 #define LINESPACE 1.05
80
81 /*
82 * The character (space) used to separate alternate fonts in the
83 * fontlist parameter to gdImageStringFT. 2.0.18: space was a oor choice for this.
84 */
85 #define LISTSEPARATOR ";"
86
87 /*
88 * DEFAULT_FONTPATH and PATHSEPARATOR are host type dependent and
89 * are normally set by configure in config.h. These are just
90 * some last resort values that might match some Un*x system
91 * if building this version of gd separate from graphviz.
92 */
93 #ifndef DEFAULT_FONTPATH
94 #if defined(__APPLE__) || (defined(__MWERKS__) && defined(macintosh))
95 #define DEFAULT_FONTPATH "/usr/share/fonts/truetype:/System/Library/Fonts:/Library/Fonts"
96 #else
97 #define DEFAULT_FONTPATH "/usr/share/fonts/truetype"
98 #endif
99 #endif
100 #ifndef PATHSEPARATOR
101 #define PATHSEPARATOR ":"
102 #endif
103
104 #ifndef TRUE
105 #define FALSE 0
106 #define TRUE !FALSE
107 #endif
108
109 #ifndef MAX
110 #define MAX(a,b) ((a)>(b)?(a):(b))
111 #endif
112
113 #ifndef MIN
114 #define MIN(a,b) ((a)<(b)?(a):(b))
115 #endif
116
117 typedef struct
118 {
119 char *fontlist; /* key */
120 FT_Library *library;
121 FT_Face face;
122 FT_Bool have_char_map_unicode, have_char_map_big5, have_char_map_sjis, have_char_map_apple_roman;
123 gdCache_head_t *glyphCache;
124 } font_t;
125
126 typedef struct
127 {
128 char *fontlist; /* key */
129 FT_Library *library;
130 } fontkey_t;
131
132 typedef struct
133 {
134 int pixel; /* key */
135 int bgcolor; /* key */
136 int fgcolor; /* key *//* -ve means no antialias */
137 gdImagePtr im; /* key */
138 int tweencolor;
139 } tweencolor_t;
140
141 typedef struct
142 {
143 int pixel; /* key */
144 int bgcolor; /* key */
145 int fgcolor; /* key *//* -ve means no antialias */
146 gdImagePtr im; /* key */
147 } tweencolorkey_t;
148
149 /********************************************************************
150 * gdTcl_UtfToUniChar is borrowed from Tcl ...
151 */
152 /*
153 * tclUtf.c --
154 *
155 * Routines for manipulating UTF-8 strings.
156 *
157 * Copyright (c) 1997-1998 Sun Microsystems, Inc.
158 *
159 * See the file "license.terms" for information on usage and redistribution
160 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
161 *
162 * SCCS: @(#) tclUtf.c 1.25 98/01/28 18:02:43
163 */
164
165 /*
166 *---------------------------------------------------------------------------
167 *
168 * gdTcl_UtfToUniChar --
169 *
170 * Extract the Tcl_UniChar represented by the UTF-8 string. Bad
171 * UTF-8 sequences are converted to valid Tcl_UniChars and processing
172 * continues. Equivalent to Plan 9 chartorune().
173 *
174 * The caller must ensure that the source buffer is long enough that
175 * this routine does not run off the end and dereference non-existent
176 * memory looking for trail bytes. If the source buffer is known to
177 * be '\0' terminated, this cannot happen. Otherwise, the caller
178 * should call Tcl_UtfCharComplete() before calling this routine to
179 * ensure that enough bytes remain in the string.
180 *
181 * Results:
182 * *chPtr is filled with the Tcl_UniChar, and the return value is the
183 * number of bytes from the UTF-8 string that were consumed.
184 *
185 * Side effects:
186 * None.
187 *
188 *---------------------------------------------------------------------------
189 */
190
191 #ifdef JISX0208
192 #include "jisx0208.h"
193 #endif
194
195 extern int any2eucjp (char *, char *, unsigned int);
196
197 /* Persistent font cache until explicitly cleared */
198 /* Fonts can be used across multiple images */
199
200 /* 2.0.16: thread safety (the font cache is shared) */
201 gdMutexDeclare(gdFontCacheMutex);
202 static gdCache_head_t *fontCache = NULL;
203 static FT_Library library;
204
205 #define Tcl_UniChar int
206 #define TCL_UTF_MAX 3
gdTcl_UtfToUniChar(char * str,Tcl_UniChar * chPtr)207 static int gdTcl_UtfToUniChar (char *str, Tcl_UniChar * chPtr)
208 /* str is the UTF8 next character pointer */
209 /* chPtr is the int for the result */
210 {
211 int byte;
212
213 /* HTML4.0 entities in decimal form, e.g. Å */
214 byte = *((unsigned char *) str);
215 if (byte == '&') {
216 int i, n = 0;
217
218 byte = *((unsigned char *) (str + 1));
219 if (byte == '#') {
220 byte = *((unsigned char *) (str + 2));
221 if (byte == 'x' || byte == 'X') {
222 for (i = 3; i < 8; i++) {
223 byte = *((unsigned char *) (str + i));
224 if (byte >= 'A' && byte <= 'F')
225 byte = byte - 'A' + 10;
226 else if (byte >= 'a' && byte <= 'f')
227 byte = byte - 'a' + 10;
228 else if (byte >= '0' && byte <= '9')
229 byte = byte - '0';
230 else
231 break;
232 n = (n * 16) + byte;
233 }
234 } else {
235 for (i = 2; i < 8; i++) {
236 byte = *((unsigned char *) (str + i));
237 if (byte >= '0' && byte <= '9') {
238 n = (n * 10) + (byte - '0');
239 } else {
240 break;
241 }
242 }
243 }
244 if (byte == ';') {
245 *chPtr = (Tcl_UniChar) n;
246 return ++i;
247 }
248 }
249 }
250
251 /* Unroll 1 to 3 byte UTF-8 sequences, use loop to handle longer ones. */
252
253 byte = *((unsigned char *) str);
254 #ifdef JISX0208
255 if (0xA1 <= byte && byte <= 0xFE) {
256 int ku, ten;
257
258 ku = (byte & 0x7F) - 0x20;
259 ten = (str[1] & 0x7F) - 0x20;
260 if ((ku < 1 || ku > 92) || (ten < 1 || ten > 94)) {
261 *chPtr = (Tcl_UniChar) byte;
262 return 1;
263 }
264
265 *chPtr = (Tcl_UniChar) UnicodeTbl[ku - 1][ten - 1];
266 return 2;
267 } else
268 #endif /* JISX0208 */
269 if (byte < 0xC0) {
270 /* Handles properly formed UTF-8 characters between
271 * 0x01 and 0x7F. Also treats \0 and naked trail
272 * bytes 0x80 to 0xBF as valid characters representing
273 * themselves.
274 */
275
276 *chPtr = (Tcl_UniChar) byte;
277 return 1;
278 } else if (byte < 0xE0) {
279 if ((str[1] & 0xC0) == 0x80) {
280 /* Two-byte-character lead-byte followed by a trail-byte. */
281
282 *chPtr = (Tcl_UniChar) (((byte & 0x1F) << 6) | (str[1] & 0x3F));
283 return 2;
284 }
285 /*
286 * A two-byte-character lead-byte not followed by trail-byte
287 * represents itself.
288 */
289
290 *chPtr = (Tcl_UniChar) byte;
291 return 1;
292 } else if (byte < 0xF0) {
293 if (((str[1] & 0xC0) == 0x80) && ((str[2] & 0xC0) == 0x80)) {
294 /* Three-byte-character lead byte followed by two trail bytes. */
295
296 *chPtr = (Tcl_UniChar) (((byte & 0x0F) << 12) | ((str[1] & 0x3F) << 6) | (str[2] & 0x3F));
297 return 3;
298 }
299 /* A three-byte-character lead-byte not followed by two trail-bytes represents itself. */
300
301 *chPtr = (Tcl_UniChar) byte;
302 return 1;
303 }
304 #if TCL_UTF_MAX > 3
305 else {
306 int ch, total, trail;
307
308 total = totalBytes[byte];
309 trail = total - 1;
310
311 if (trail > 0) {
312 ch = byte & (0x3F >> trail);
313 do {
314 str++;
315 if ((*str & 0xC0) != 0x80) {
316 *chPtr = byte;
317 return 1;
318 }
319 ch <<= 6;
320 ch |= (*str & 0x3F);
321 trail--;
322 } while (trail > 0);
323 *chPtr = ch;
324 return total;
325 }
326 }
327 #endif
328
329 *chPtr = (Tcl_UniChar) byte;
330 return 1;
331 }
332
333 /********************************************************************/
334 /* font cache functions */
335
fontTest(void * element,void * key)336 static int fontTest (void *element, void *key)
337 {
338 font_t *a = (font_t *) element;
339 fontkey_t *b = (fontkey_t *) key;
340
341 return (strcmp (a->fontlist, b->fontlist) == 0);
342 }
343
fontFetch(char ** error,void * key)344 static void *fontFetch (char **error, void *key)
345 {
346 font_t *a;
347 fontkey_t *b = (fontkey_t *) key;
348 int n;
349 int font_found = 0;
350 unsigned short platform, encoding;
351 char *fontsearchpath, *fontlist;
352 char fullname[MAXPATHLEN], cur_dir[MAXPATHLEN];
353 char *name, *path=NULL, *dir;
354 char *strtok_ptr;
355 FT_Error err;
356 FT_CharMap found = 0;
357 FT_CharMap charmap;
358
359 a = (font_t *) gdPMalloc(sizeof(font_t));
360 a->fontlist = gdPEstrdup(b->fontlist);
361 a->library = b->library;
362
363 /*
364 * Search the pathlist for any of a list of font names.
365 */
366 fontsearchpath = getenv ("GDFONTPATH");
367 if (!fontsearchpath) {
368 fontsearchpath = DEFAULT_FONTPATH;
369 }
370 fontlist = gdEstrdup(a->fontlist);
371
372 /*
373 * Must use gd_strtok_r else pointer corrupted by strtok in nested loop.
374 */
375 for (name = gd_strtok_r (fontlist, LISTSEPARATOR, &strtok_ptr); name; name = gd_strtok_r (0, LISTSEPARATOR, &strtok_ptr)) {
376 /* make a fresh copy each time - strtok corrupts it. */
377 path = gdEstrdup (fontsearchpath);
378
379 /* if name is an absolute filename then test directly */
380 #ifdef NETWARE
381 if (*name == '/' || (name[0] != 0 && strstr(name, ":/"))) {
382 #else
383 if (*name == '/' || (name[0] != 0 && name[1] == ':' && (name[2] == '/' || name[2] == '\\'))) {
384 #endif
385 snprintf(fullname, sizeof(fullname) - 1, "%s", name);
386 if (access(fullname, R_OK) == 0) {
387 font_found++;
388 break;
389 }
390 }
391 for (dir = strtok (path, PATHSEPARATOR); dir; dir = strtok (0, PATHSEPARATOR)) {
392 if (!strcmp(dir, ".")) {
393 TSRMLS_FETCH();
394 #if HAVE_GETCWD
395 dir = VCWD_GETCWD(cur_dir, MAXPATHLEN);
396 #elif HAVE_GETWD
397 dir = VCWD_GETWD(cur_dir);
398 #endif
399 if (!dir) {
400 continue;
401 }
402 }
403
404 #define GD_CHECK_FONT_PATH(ext) \
405 snprintf(fullname, sizeof(fullname) - 1, "%s/%s%s", dir, name, ext); \
406 if (access(fullname, R_OK) == 0) { \
407 font_found++; \
408 break; \
409 } \
410
411 GD_CHECK_FONT_PATH("");
412 GD_CHECK_FONT_PATH(".ttf");
413 GD_CHECK_FONT_PATH(".pfa");
414 GD_CHECK_FONT_PATH(".pfb");
415 GD_CHECK_FONT_PATH(".dfont");
416 }
417 gdFree(path);
418 path = NULL;
419 if (font_found) {
420 break;
421 }
422 }
423
424 if (path) {
425 gdFree(path);
426 }
427
428 gdFree(fontlist);
429
430 if (!font_found) {
431 gdPFree(a->fontlist);
432 gdPFree(a);
433 *error = "Could not find/open font";
434 return NULL;
435 }
436
437 err = FT_New_Face (*b->library, fullname, 0, &a->face);
438 if (err) {
439 gdPFree(a->fontlist);
440 gdPFree(a);
441 *error = "Could not read font";
442 return NULL;
443 }
444
445 /* FIXME - This mapping stuff is imcomplete - where is the spec? */
446 /* EAM - It's worse than that. It's pointless to match character encodings here.
447 * As currently written, the stored a->face->charmap only matches one of
448 * the actual charmaps and we cannot know at this stage if it is the right
449 * one. We should just skip all this stuff, and check in gdImageStringFTEx
450 * if some particular charmap is preferred and if so whether it is held in
451 * one of the a->face->charmaps[0..num_charmaps].
452 * And why is it so bad not to find any recognized charmap? The user may
453 * still know what mapping to use, even if we do not. In that case we can
454 * just use the map in a->face->charmaps[num_charmaps] and be done with it.
455 */
456
457 a->have_char_map_unicode = 0;
458 a->have_char_map_big5 = 0;
459 a->have_char_map_sjis = 0;
460 a->have_char_map_apple_roman = 0;
461 for (n = 0; n < a->face->num_charmaps; n++) {
462 charmap = a->face->charmaps[n];
463 platform = charmap->platform_id;
464 encoding = charmap->encoding_id;
465
466 /* EAM DEBUG - Newer versions of libfree2 make it easier by defining encodings */
467 #if (defined(FREETYPE_MAJOR) && ((FREETYPE_MAJOR == 2 && ((FREETYPE_MINOR == 1 && FREETYPE_PATCH >= 3) || FREETYPE_MINOR > 1) || FREETYPE_MAJOR > 2)))
468 if (charmap->encoding == FT_ENCODING_MS_SYMBOL
469 || charmap->encoding == FT_ENCODING_ADOBE_CUSTOM
470 || charmap->encoding == FT_ENCODING_ADOBE_STANDARD) {
471 a->have_char_map_unicode = 1;
472 found = charmap;
473 a->face->charmap = charmap;
474 return (void *)a;
475 }
476 #endif /* Freetype 2.1.3 or better */
477 /* EAM DEBUG */
478
479 if ((platform == 3 && encoding == 1) /* Windows Unicode */
480 || (platform == 3 && encoding == 0) /* Windows Symbol */
481 || (platform == 2 && encoding == 1) /* ISO Unicode */
482 || (platform == 0))
483 { /* Apple Unicode */
484 a->have_char_map_unicode = 1;
485 found = charmap;
486 } else if (platform == 3 && encoding == 4) { /* Windows Big5 */
487 a->have_char_map_big5 = 1;
488 found = charmap;
489 } else if (platform == 3 && encoding == 2) { /* Windows Sjis */
490 a->have_char_map_sjis = 1;
491 found = charmap;
492 } else if ((platform == 1 && encoding == 0) /* Apple Roman */
493 || (platform == 2 && encoding == 0))
494 { /* ISO ASCII */
495 a->have_char_map_apple_roman = 1;
496 found = charmap;
497 }
498 }
499 if (!found) {
500 gdPFree(a->fontlist);
501 gdPFree(a);
502 *error = "Unable to find a CharMap that I can handle";
503 return NULL;
504 }
505
506 /* 2.0.5: we should actually return this */
507 a->face->charmap = found;
508 return (void *) a;
509 }
510
511 static void fontRelease (void *element)
512 {
513 font_t *a = (font_t *) element;
514
515 FT_Done_Face (a->face);
516 gdPFree(a->fontlist);
517 gdPFree((char *) element);
518 }
519
520 /********************************************************************/
521 /* tweencolor cache functions */
522
523 static int tweenColorTest (void *element, void *key)
524 {
525 tweencolor_t *a = (tweencolor_t *) element;
526 tweencolorkey_t *b = (tweencolorkey_t *) key;
527
528 return (a->pixel == b->pixel && a->bgcolor == b->bgcolor && a->fgcolor == b->fgcolor && a->im == b->im);
529 }
530
531 /*
532 * Computes a color in im's color table that is part way between
533 * the background and foreground colors proportional to the gray
534 * pixel value in the range 0-NUMCOLORS. The fg and bg colors must already
535 * be in the color table for palette images. For truecolor images the
536 * returned value simply has an alpha component and gdImageAlphaBlend
537 * does the work so that text can be alpha blended across a complex
538 * background (TBB; and for real in 2.0.2).
539 */
540 static void * tweenColorFetch (char **error, void *key)
541 {
542 tweencolor_t *a;
543 tweencolorkey_t *b = (tweencolorkey_t *) key;
544 int pixel, npixel, bg, fg;
545 gdImagePtr im;
546
547 a = (tweencolor_t *) gdMalloc (sizeof (tweencolor_t));
548 pixel = a->pixel = b->pixel;
549 bg = a->bgcolor = b->bgcolor;
550 fg = a->fgcolor = b->fgcolor;
551 im = a->im = b->im;
552
553 /* if fg is specified by a negative color idx, then don't antialias */
554 if (fg < 0) {
555 if ((pixel + pixel) >= NUMCOLORS) {
556 a->tweencolor = -fg;
557 } else {
558 a->tweencolor = bg;
559 }
560 } else {
561 npixel = NUMCOLORS - pixel;
562 if (im->trueColor) {
563 /* 2.0.1: use gdImageSetPixel to do the alpha blending work,
564 * or to just store the alpha level. All we have to do here
565 * is incorporate our knowledge of the percentage of this
566 * pixel that is really "lit" by pushing the alpha value
567 * up toward transparency in edge regions.
568 */
569 a->tweencolor = gdTrueColorAlpha(
570 gdTrueColorGetRed(fg),
571 gdTrueColorGetGreen(fg),
572 gdTrueColorGetBlue(fg),
573 gdAlphaMax - (gdTrueColorGetAlpha (fg) * pixel / NUMCOLORS));
574 } else {
575 a->tweencolor = gdImageColorResolve(im,
576 (pixel * im->red[fg] + npixel * im->red[bg]) / NUMCOLORS,
577 (pixel * im->green[fg] + npixel * im->green[bg]) / NUMCOLORS,
578 (pixel * im->blue[fg] + npixel * im->blue[bg]) / NUMCOLORS);
579 }
580 }
581 return (void *) a;
582 }
583
584 static void tweenColorRelease (void *element)
585 {
586 gdFree((char *) element);
587 }
588
589 /* draw_bitmap - transfers glyph bitmap to GD image */
590 static char * gdft_draw_bitmap (gdCache_head_t *tc_cache, gdImage * im, int fg, FT_Bitmap bitmap, int pen_x, int pen_y)
591 {
592 unsigned char *pixel = NULL;
593 int *tpixel = NULL;
594 int x, y, row, col, pc, pcr;
595
596 tweencolor_t *tc_elem;
597 tweencolorkey_t tc_key;
598
599 /* copy to image, mapping colors */
600 tc_key.fgcolor = fg;
601 tc_key.im = im;
602 /* Truecolor version; does not require the cache */
603 if (im->trueColor) {
604 for (row = 0; row < bitmap.rows; row++) {
605 pc = row * bitmap.pitch;
606 pcr = pc;
607 y = pen_y + row;
608 /* clip if out of bounds */
609 /* 2.0.16: clipping rectangle, not image bounds */
610 if ((y > im->cy2) || (y < im->cy1)) {
611 continue;
612 }
613 for (col = 0; col < bitmap.width; col++, pc++) {
614 int level;
615 if (bitmap.pixel_mode == ft_pixel_mode_grays) {
616 /* Scale to 128 levels of alpha for gd use.
617 * alpha 0 is opacity, so be sure to invert at the end
618 */
619 level = (bitmap.buffer[pc] * gdAlphaMax / (bitmap.num_grays - 1));
620 } else if (bitmap.pixel_mode == ft_pixel_mode_mono) {
621 /* 2.0.5: mode_mono fix from Giuliano Pochini */
622 level = ((bitmap.buffer[(col>>3)+pcr]) & (1<<(~col&0x07))) ? gdAlphaTransparent : gdAlphaOpaque;
623 } else {
624 return "Unsupported ft_pixel_mode";
625 }
626 if ((fg >= 0) && (im->trueColor)) {
627 /* Consider alpha in the foreground color itself to be an
628 * upper bound on how opaque things get, when truecolor is
629 * available. Without truecolor this results in far too many
630 * color indexes.
631 */
632 level = level * (gdAlphaMax - gdTrueColorGetAlpha(fg)) / gdAlphaMax;
633 }
634 level = gdAlphaMax - level;
635 x = pen_x + col;
636 /* clip if out of bounds */
637 /* 2.0.16: clip to clipping rectangle, Matt McNabb */
638 if ((x > im->cx2) || (x < im->cx1)) {
639 continue;
640 }
641 /* get pixel location in gd buffer */
642 tpixel = &im->tpixels[y][x];
643 if (fg < 0) {
644 if (level < (gdAlphaMax / 2)) {
645 *tpixel = -fg;
646 }
647 } else {
648 if (im->alphaBlendingFlag) {
649 *tpixel = gdAlphaBlend(*tpixel, (level << 24) + (fg & 0xFFFFFF));
650 } else {
651 *tpixel = (level << 24) + (fg & 0xFFFFFF);
652 }
653 }
654 }
655 }
656 return (char *) NULL;
657 }
658 /* Non-truecolor case, restored to its more or less original form */
659 for (row = 0; row < bitmap.rows; row++) {
660 int pcr;
661 pc = row * bitmap.pitch;
662 pcr = pc;
663 if (bitmap.pixel_mode==ft_pixel_mode_mono) {
664 pc *= 8; /* pc is measured in bits for monochrome images */
665 }
666 y = pen_y + row;
667
668 /* clip if out of bounds */
669 if (y >= im->sy || y < 0) {
670 continue;
671 }
672
673 for (col = 0; col < bitmap.width; col++, pc++) {
674 if (bitmap.pixel_mode == ft_pixel_mode_grays) {
675 /*
676 * Round to NUMCOLORS levels of antialiasing for
677 * index color images since only 256 colors are
678 * available.
679 */
680 tc_key.pixel = ((bitmap.buffer[pc] * NUMCOLORS) + bitmap.num_grays / 2) / (bitmap.num_grays - 1);
681 } else if (bitmap.pixel_mode == ft_pixel_mode_mono) {
682 tc_key.pixel = ((bitmap.buffer[pc / 8] << (pc % 8)) & 128) ? NUMCOLORS : 0;
683 /* 2.0.5: mode_mono fix from Giuliano Pochini */
684 tc_key.pixel = ((bitmap.buffer[(col>>3)+pcr]) & (1<<(~col&0x07))) ? NUMCOLORS : 0;
685 } else {
686 return "Unsupported ft_pixel_mode";
687 }
688 if (tc_key.pixel > 0) { /* if not background */
689 x = pen_x + col;
690
691 /* clip if out of bounds */
692 if (x >= im->sx || x < 0) {
693 continue;
694 }
695 /* get pixel location in gd buffer */
696 pixel = &im->pixels[y][x];
697 if (tc_key.pixel == NUMCOLORS) {
698 /* use fg color directly. gd 2.0.2: watch out for
699 * negative indexes (thanks to David Marwood).
700 */
701 *pixel = (fg < 0) ? -fg : fg;
702 } else {
703 /* find antialised color */
704 tc_key.bgcolor = *pixel;
705 tc_elem = (tweencolor_t *) gdCacheGet(tc_cache, &tc_key);
706 *pixel = tc_elem->tweencolor;
707 }
708 }
709 }
710 }
711 return (char *) NULL;
712 }
713
714 static int
715 gdroundupdown (FT_F26Dot6 v1, int updown)
716 {
717 return (!updown) ? (v1 < 0 ? ((v1 - 63) >> 6) : v1 >> 6) : (v1 > 0 ? ((v1 + 63) >> 6) : v1 >> 6);
718 }
719
720 void gdFontCacheShutdown()
721 {
722 gdMutexLock(gdFontCacheMutex);
723
724 if (fontCache) {
725 gdCacheDelete(fontCache);
726 fontCache = NULL;
727 FT_Done_FreeType(library);
728 }
729
730 gdMutexUnlock(gdFontCacheMutex);
731 }
732
733 void gdFreeFontCache()
734 {
735 gdFontCacheShutdown();
736 }
737
738 void gdFontCacheMutexSetup()
739 {
740 gdMutexSetup(gdFontCacheMutex);
741 }
742
743 void gdFontCacheMutexShutdown()
744 {
745 gdMutexShutdown(gdFontCacheMutex);
746 }
747
748 int gdFontCacheSetup(void)
749 {
750 if (fontCache) {
751 /* Already set up */
752 return 0;
753 }
754 if (FT_Init_FreeType(&library)) {
755 return -1;
756 }
757 fontCache = gdCacheCreate (FONTCACHESIZE, fontTest, fontFetch, fontRelease);
758 return 0;
759 }
760
761
762 /********************************************************************/
763 /* gdImageStringFT - render a utf8 string onto a gd image */
764
765 char *
766 gdImageStringFT (gdImage * im, int *brect, int fg, char *fontlist,
767 double ptsize, double angle, int x, int y, char *string)
768 {
769 return gdImageStringFTEx(im, brect, fg, fontlist, ptsize, angle, x, y, string, 0);
770 }
771
772 char *
773 gdImageStringFTEx (gdImage * im, int *brect, int fg, char *fontlist, double ptsize, double angle, int x, int y, char *string, gdFTStringExtraPtr strex)
774 {
775 FT_BBox bbox, glyph_bbox;
776 FT_Matrix matrix;
777 FT_Vector pen, delta, penf;
778 FT_Face face;
779 FT_Glyph image;
780 FT_GlyphSlot slot;
781 FT_Bool use_kerning;
782 FT_UInt glyph_index, previous;
783 double sin_a = sin (angle);
784 double cos_a = cos (angle);
785 int len, i = 0, ch;
786 int x1 = 0, y1 = 0;
787 int xb = x, yb = y;
788 int yd = 0;
789 font_t *font;
790 fontkey_t fontkey;
791 char *next;
792 char *tmpstr = NULL;
793 int render = (im && (im->trueColor || (fg <= 255 && fg >= -255)));
794 FT_BitmapGlyph bm;
795 /* 2.0.13: Bob Ostermann: don't force autohint, that's just for testing freetype and doesn't look as good */
796 int render_mode = FT_LOAD_DEFAULT;
797 int m, mfound;
798 /* Now tuneable thanks to Wez Furlong */
799 double linespace = LINESPACE;
800 /* 2.0.6: put this declaration with the other declarations! */
801 /*
802 * make a new tweenColorCache on every call
803 * because caching colormappings between calls
804 * is not safe. If the im-pointer points to a
805 * brand new image, the cache gives out bogus
806 * colorindexes. -- 27.06.2001 <krisku@arrak.fi>
807 */
808 gdCache_head_t *tc_cache;
809 /* Tuneable horizontal and vertical resolution in dots per inch */
810 int hdpi, vdpi;
811
812 if (strex && ((strex->flags & gdFTEX_LINESPACE) == gdFTEX_LINESPACE)) {
813 linespace = strex->linespacing;
814 }
815 tc_cache = gdCacheCreate(TWEENCOLORCACHESIZE, tweenColorTest, tweenColorFetch, tweenColorRelease);
816
817 /***** initialize font library and font cache on first call ******/
818
819 gdMutexLock(gdFontCacheMutex);
820 if (!fontCache) {
821 if (gdFontCacheSetup() != 0) {
822 gdCacheDelete(tc_cache);
823 gdMutexUnlock(gdFontCacheMutex);
824 return "Failure to initialize font library";
825 }
826 }
827 /*****/
828
829 /* get the font (via font cache) */
830 fontkey.fontlist = fontlist;
831 fontkey.library = &library;
832 font = (font_t *) gdCacheGet (fontCache, &fontkey);
833 if (!font) {
834 gdCacheDelete(tc_cache);
835 gdMutexUnlock(gdFontCacheMutex);
836 return fontCache->error;
837 }
838 face = font->face; /* shortcut */
839 slot = face->glyph; /* shortcut */
840
841 /*
842 * Added hdpi and vdpi to support images at non-screen resolutions, i.e. 300 dpi TIFF,
843 * or 100h x 50v dpi FAX format. 2.0.23.
844 * 2004/02/27 Mark Shackelford, mark.shackelford@acs-inc.com
845 */
846 hdpi = GD_RESOLUTION;
847 vdpi = GD_RESOLUTION;
848 if (strex && (strex->flags & gdFTEX_RESOLUTION)) {
849 hdpi = strex->hdpi;
850 vdpi = strex->vdpi;
851 }
852
853 if (FT_Set_Char_Size(face, 0, (FT_F26Dot6) (ptsize * 64), hdpi, vdpi)) {
854 gdCacheDelete(tc_cache);
855 gdMutexUnlock(gdFontCacheMutex);
856 return "Could not set character size";
857 }
858
859 matrix.xx = (FT_Fixed) (cos_a * (1 << 16));
860 matrix.yx = (FT_Fixed) (sin_a * (1 << 16));
861 matrix.xy = -matrix.yx;
862 matrix.yy = matrix.xx;
863
864 penf.x = penf.y = 0; /* running position of non-rotated string */
865 pen.x = pen.y = 0; /* running position of rotated string */
866 bbox.xMin = bbox.xMax = bbox.yMin = bbox.yMax = 0;
867
868 use_kerning = FT_HAS_KERNING (face);
869 previous = 0;
870 if (fg < 0) {
871 render_mode |= FT_LOAD_MONOCHROME;
872 }
873 /* 2.0.12: allow explicit specification of the preferred map;
874 * but we still fall back if it is not available.
875 */
876 m = gdFTEX_Unicode;
877 if (strex && (strex->flags & gdFTEX_CHARMAP)) {
878 m = strex->charmap;
879 }
880 /* Try all three types of maps, but start with the specified one */
881 mfound = 0;
882 for (i = 0; i < 3; i++) {
883 switch (m) {
884 case gdFTEX_Unicode:
885 if (font->have_char_map_unicode) {
886 mfound = 1;
887 }
888 break;
889 case gdFTEX_Shift_JIS:
890 if (font->have_char_map_sjis) {
891 mfound = 1;
892 }
893 break;
894 case gdFTEX_Big5:
895 /* This was the 'else' case, we can't really 'detect' it */
896 mfound = 1;
897 break;
898 }
899 if (mfound) {
900 break;
901 }
902 m++;
903 m %= 3;
904 }
905 if (!mfound) {
906 /* No character set found! */
907 gdMutexUnlock(gdFontCacheMutex);
908 return "No character set found";
909 }
910
911 #ifndef JISX0208
912 if (font->have_char_map_sjis) {
913 #endif
914 tmpstr = (char *) gdMalloc(BUFSIZ);
915 any2eucjp(tmpstr, string, BUFSIZ);
916 next = tmpstr;
917 #ifndef JISX0208
918 } else {
919 next = string;
920 }
921 #endif
922
923 i = 0;
924 while (*next) {
925 ch = *next;
926
927 /* carriage returns */
928 if (ch == '\r') {
929 penf.x = 0;
930 x1 = (int)(- penf.y * sin_a + 32) / 64;
931 y1 = (int)(- penf.y * cos_a + 32) / 64;
932 pen.x = pen.y = 0;
933 previous = 0; /* clear kerning flag */
934 next++;
935 continue;
936 }
937 /* newlines */
938 if (ch == '\n') {
939 if (!*(++next)) break;
940 /* 2.0.13: reset penf.x. Christopher J. Grayce */
941 penf.x = 0;
942 penf.y -= (long)(face->size->metrics.height * linespace);
943 penf.y = (penf.y - 32) & -64; /* round to next pixel row */
944 x1 = (int)(- penf.y * sin_a + 32) / 64;
945 y1 = (int)(- penf.y * cos_a + 32) / 64;
946 xb = x + x1;
947 yb = y + y1;
948 yd = 0;
949 pen.x = pen.y = 0;
950 previous = 0; /* clear kerning flag */
951 continue;
952 }
953
954 /* EAM DEBUG */
955 #if (defined(FREETYPE_MAJOR) && ((FREETYPE_MAJOR == 2 && ((FREETYPE_MINOR == 1 && FREETYPE_PATCH >= 3) || FREETYPE_MINOR > 1) || FREETYPE_MAJOR > 2)))
956 if (font->face->family_name && font->face->charmap->encoding &&
957 font->face->charmap->encoding == FT_ENCODING_MS_SYMBOL && strcmp(font->face->family_name, "Symbol") == 0) {
958 /* I do not know the significance of the constant 0xf000.
959 * It was determined by inspection of the character codes
960 * stored in Microsoft font symbol.
961 * Added by Pierre (pajoye@php.net):
962 * Convert to the Symbol glyph range only for a Symbol family member
963 */
964 len = gdTcl_UtfToUniChar (next, &ch);
965 ch |= 0xf000;
966 next += len;
967 } else
968 #endif /* Freetype 2.1 or better */
969 /* EAM DEBUG */
970
971 switch (m) {
972 case gdFTEX_Unicode:
973 if (font->have_char_map_unicode) {
974 /* use UTF-8 mapping from ASCII */
975 len = gdTcl_UtfToUniChar(next, &ch);
976 next += len;
977 }
978 break;
979 case gdFTEX_Shift_JIS:
980 if (font->have_char_map_sjis) {
981 unsigned char c;
982 int jiscode;
983 c = *next;
984 if (0xA1 <= c && c <= 0xFE) {
985 next++;
986 jiscode = 0x100 * (c & 0x7F) + ((*next) & 0x7F);
987
988 ch = (jiscode >> 8) & 0xFF;
989 jiscode &= 0xFF;
990
991 if (ch & 1) {
992 jiscode += 0x40 - 0x21;
993 } else {
994 jiscode += 0x9E - 0x21;
995 }
996
997 if (jiscode >= 0x7F) {
998 jiscode++;
999 }
1000 ch = (ch - 0x21) / 2 + 0x81;
1001 if (ch >= 0xA0) {
1002 ch += 0x40;
1003 }
1004
1005 ch = (ch << 8) + jiscode;
1006 } else {
1007 ch = c & 0xFF; /* don't extend sign */
1008 }
1009 if (*next) next++;
1010 }
1011 break;
1012 case gdFTEX_Big5: {
1013 /*
1014 * Big 5 mapping:
1015 * use "JIS-8 half-width katakana" coding from 8-bit characters. Ref:
1016 * ftp://ftp.ora.com/pub/examples/nutshell/ujip/doc/japan.inf-032092.sjs
1017 */
1018 ch = (*next) & 0xFF; /* don't extend sign */
1019 next++;
1020 if (ch >= 161 /* first code of JIS-8 pair */
1021 && *next) { /* don't advance past '\0' */
1022 /* TBB: Fix from Kwok Wah On: & 255 needed */
1023 ch = (ch * 256) + ((*next) & 255);
1024 next++;
1025 }
1026 }
1027 break;
1028 }
1029
1030 /* set rotation transform */
1031 FT_Set_Transform(face, &matrix, NULL);
1032 /* Convert character code to glyph index */
1033 glyph_index = FT_Get_Char_Index(face, ch);
1034
1035 /* retrieve kerning distance and move pen position */
1036 if (use_kerning && previous && glyph_index) {
1037 FT_Get_Kerning(face, previous, glyph_index, ft_kerning_default, &delta);
1038 pen.x += delta.x;
1039 penf.x += delta.x;
1040 }
1041
1042 /* load glyph image into the slot (erase previous one) */
1043 if (FT_Load_Glyph(face, glyph_index, render_mode)) {
1044 if (tmpstr) {
1045 gdFree(tmpstr);
1046 }
1047 gdCacheDelete(tc_cache);
1048 gdMutexUnlock(gdFontCacheMutex);
1049 return "Problem loading glyph";
1050 }
1051
1052 /* transform glyph image */
1053 FT_Get_Glyph(slot, &image);
1054 if (brect) { /* only if need brect */
1055 FT_Glyph_Get_CBox(image, ft_glyph_bbox_gridfit, &glyph_bbox);
1056 glyph_bbox.xMin += penf.x;
1057 glyph_bbox.yMin += penf.y;
1058 glyph_bbox.xMax += penf.x;
1059 glyph_bbox.yMax += penf.y;
1060 if (ch == ' ') { /* special case for trailing space */
1061 glyph_bbox.xMax += slot->metrics.horiAdvance;
1062 }
1063 if (!i) { /* if first character, init BB corner values */
1064 yd = slot->metrics.height - slot->metrics.horiBearingY;
1065 bbox.xMin = glyph_bbox.xMin;
1066 bbox.yMin = glyph_bbox.yMin;
1067 bbox.xMax = glyph_bbox.xMax;
1068 bbox.yMax = glyph_bbox.yMax;
1069 } else {
1070 FT_Pos desc;
1071
1072 if ( (desc = (slot->metrics.height - slot->metrics.horiBearingY)) > yd) {
1073 yd = desc;
1074 }
1075 if (bbox.xMin > glyph_bbox.xMin) {
1076 bbox.xMin = glyph_bbox.xMin;
1077 }
1078 if (bbox.yMin > glyph_bbox.yMin) {
1079 bbox.yMin = glyph_bbox.yMin;
1080 }
1081 if (bbox.xMax < glyph_bbox.xMax) {
1082 bbox.xMax = glyph_bbox.xMax;
1083 }
1084 if (bbox.yMax < glyph_bbox.yMax) {
1085 bbox.yMax = glyph_bbox.yMax;
1086 }
1087 }
1088 i++;
1089 }
1090
1091 if (render) {
1092 if (image->format != ft_glyph_format_bitmap && FT_Glyph_To_Bitmap(&image, ft_render_mode_normal, 0, 1)) {
1093 FT_Done_Glyph(image);
1094 if (tmpstr) {
1095 gdFree(tmpstr);
1096 }
1097 gdCacheDelete(tc_cache);
1098 gdMutexUnlock(gdFontCacheMutex);
1099 return "Problem rendering glyph";
1100 }
1101
1102 /* now, draw to our target surface */
1103 bm = (FT_BitmapGlyph) image;
1104 gdft_draw_bitmap(tc_cache, im, fg, bm->bitmap, x + x1 + ((pen.x + 31) >> 6) + bm->left, y + y1 + ((pen.y + 31) >> 6) - bm->top);
1105 }
1106
1107 /* record current glyph index for kerning */
1108 previous = glyph_index;
1109
1110 /* increment pen position */
1111 pen.x += image->advance.x >> 10;
1112 pen.y -= image->advance.y >> 10;
1113
1114 penf.x += slot->metrics.horiAdvance;
1115
1116 FT_Done_Glyph(image);
1117 }
1118
1119 if (brect) { /* only if need brect */
1120 /* For perfect rounding, must get sin(a + pi/4) and sin(a - pi/4). */
1121 double d1 = sin (angle + 0.78539816339744830962);
1122 double d2 = sin (angle - 0.78539816339744830962);
1123
1124 /* make the center of rotation at (0, 0) */
1125 FT_BBox normbox;
1126
1127 normbox.xMin = 0;
1128 normbox.yMin = 0;
1129 normbox.xMax = bbox.xMax - bbox.xMin;
1130 normbox.yMax = bbox.yMax - bbox.yMin;
1131
1132 brect[0] = brect[2] = brect[4] = brect[6] = (int) (yd * sin_a);
1133 brect[1] = brect[3] = brect[5] = brect[7] = (int)(- yd * cos_a);
1134
1135 /* rotate bounding rectangle */
1136 brect[0] += (int) (normbox.xMin * cos_a - normbox.yMin * sin_a);
1137 brect[1] += (int) (normbox.xMin * sin_a + normbox.yMin * cos_a);
1138 brect[2] += (int) (normbox.xMax * cos_a - normbox.yMin * sin_a);
1139 brect[3] += (int) (normbox.xMax * sin_a + normbox.yMin * cos_a);
1140 brect[4] += (int) (normbox.xMax * cos_a - normbox.yMax * sin_a);
1141 brect[5] += (int) (normbox.xMax * sin_a + normbox.yMax * cos_a);
1142 brect[6] += (int) (normbox.xMin * cos_a - normbox.yMax * sin_a);
1143 brect[7] += (int) (normbox.xMin * sin_a + normbox.yMax * cos_a);
1144
1145 /* scale, round and offset brect */
1146 brect[0] = xb + gdroundupdown(brect[0], d2 > 0);
1147 brect[1] = yb - gdroundupdown(brect[1], d1 < 0);
1148 brect[2] = xb + gdroundupdown(brect[2], d1 > 0);
1149 brect[3] = yb - gdroundupdown(brect[3], d2 > 0);
1150 brect[4] = xb + gdroundupdown(brect[4], d2 < 0);
1151 brect[5] = yb - gdroundupdown(brect[5], d1 > 0);
1152 brect[6] = xb + gdroundupdown(brect[6], d1 < 0);
1153 brect[7] = yb - gdroundupdown(brect[7], d2 < 0);
1154 }
1155
1156 if (tmpstr) {
1157 gdFree(tmpstr);
1158 }
1159 gdCacheDelete(tc_cache);
1160 gdMutexUnlock(gdFontCacheMutex);
1161 return (char *) NULL;
1162 }
1163
1164 #endif /* HAVE_LIBFREETYPE */
1165
