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Typo fix.
[emacs.git] / src / ftfont.c
bloba3ce243f369b2b04452a8341458ae2ad662b23d7
1 /* ftfont.c -- FreeType font driver.
2 Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
3 Copyright (C) 2006, 2007, 2008
4 National Institute of Advanced Industrial Science and Technology (AIST)
5 Registration Number H13PRO009
6
7 This file is part of GNU Emacs.
8
9 GNU Emacs is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
12 any later version.
13
14 GNU Emacs is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with GNU Emacs; see the file COPYING. If not, write to
21 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
23
24 #include <config.h>
25 #include <stdio.h>
26
27 #include <fontconfig/fontconfig.h>
28 #include <fontconfig/fcfreetype.h>
29
30 #include "lisp.h"
31 #include "dispextern.h"
32 #include "frame.h"
33 #include "blockinput.h"
34 #include "character.h"
35 #include "charset.h"
36 #include "coding.h"
37 #include "fontset.h"
38 #include "font.h"
39 #include "ftfont.h"
40
41 /* Symbolic type of this font-driver. */
42 Lisp_Object Qfreetype;
43
44 /* Fontconfig's generic families and their aliases. */
45 static Lisp_Object Qmonospace, Qsans_serif, Qserif, Qmono, Qsans, Qsans__serif;
46
47 /* Flag to tell if FcInit is areadly called or not. */
48 static int fc_initialized;
49
50 /* Handle to a FreeType library instance. */
51 static FT_Library ft_library;
52
53 /* Cache for FreeType fonts. */
54 static Lisp_Object freetype_font_cache;
55
56 /* Fontconfig's charset used for finding fonts of registry
57 "iso8859-1". */
58 static FcCharSet *cs_iso8859_1;
59
60 /* The actual structure for FreeType font that can be casted to struct
61 font. */
62
63 struct ftfont_info
64 {
65 struct font font;
66 FT_Size ft_size;
67 #ifdef HAVE_LIBOTF
68 int maybe_otf; /* Flag to tell if this may be OTF or not. */
69 OTF *otf;
70 #endif /* HAVE_LIBOTF */
71 };
72
73 static int ftfont_build_basic_charsets P_ ((void));
74 static Lisp_Object ftfont_pattern_entity P_ ((FcPattern *,
75 Lisp_Object, Lisp_Object));
76 static Lisp_Object ftfont_list_generic_family P_ ((Lisp_Object, Lisp_Object,
77 Lisp_Object));
78 Lisp_Object ftfont_font_format P_ ((FcPattern *));
79
80 #define SYMBOL_FcChar8(SYM) (FcChar8 *) SDATA (SYMBOL_NAME (SYM))
81
82 static int
83 ftfont_build_basic_charsets ()
84 {
85 FcChar32 c;
86
87 cs_iso8859_1 = FcCharSetCreate ();
88 if (! cs_iso8859_1)
89 return -1;
90 for (c = ' '; c < 127; c++)
91 if (! FcCharSetAddChar (cs_iso8859_1, c))
92 return -1;
93 #if 0
94 /* This part is currently disabled. Should be fixed later. */
95 for (c = 192; c < 256; c++)
96 if (! FcCharSetAddChar (cs_iso8859_1, c))
97 return -1;
98 #endif
99 return 0;
100 }
101
102 static Lisp_Object
103 ftfont_pattern_entity (p, frame, registry)
104 FcPattern *p;
105 Lisp_Object frame, registry;
106 {
107 Lisp_Object entity;
108 FcChar8 *file, *fontformat;
109 FcCharSet *charset;
110 FcChar8 *str;
111 int numeric;
112 double dbl;
113
114 if (FcPatternGetString (p, FC_FILE, 0, &file) != FcResultMatch)
115 return Qnil;
116 if (FcPatternGetCharSet (p, FC_CHARSET, 0, &charset) != FcResultMatch)
117 charset = NULL;
118 #ifdef FC_FONTFORMAT
119 if (FcPatternGetString (p, FC_FONTFORMAT, 0, &fontformat) != FcResultMatch)
120 #endif /* FC_FONTFORMAT */
121 fontformat = NULL;
122
123 entity = Fmake_vector (make_number (FONT_ENTITY_MAX), null_string);
124
125 ASET (entity, FONT_TYPE_INDEX, Qfreetype);
126 ASET (entity, FONT_REGISTRY_INDEX, registry);
127 ASET (entity, FONT_FRAME_INDEX, frame);
128 ASET (entity, FONT_OBJLIST_INDEX, Qnil);
129
130 if (FcPatternGetString (p, FC_FOUNDRY, 0, &str) == FcResultMatch)
131 ASET (entity, FONT_FOUNDRY_INDEX, intern_downcase (str, strlen (str)));
132 if (FcPatternGetString (p, FC_FAMILY, 0, &str) == FcResultMatch)
133 ASET (entity, FONT_FAMILY_INDEX, intern_downcase (str, strlen (str)));
134 if (FcPatternGetInteger (p, FC_WEIGHT, 0, &numeric) == FcResultMatch)
135 {
136 if (numeric == FC_WEIGHT_REGULAR)
137 numeric = 100;
138 ASET (entity, FONT_WEIGHT_INDEX, make_number (numeric));
139 }
140 if (FcPatternGetInteger (p, FC_SLANT, 0, &numeric) == FcResultMatch)
141 ASET (entity, FONT_SLANT_INDEX, make_number (numeric + 100));
142 if (FcPatternGetInteger (p, FC_WIDTH, 0, &numeric) == FcResultMatch)
143 ASET (entity, FONT_WIDTH_INDEX, make_number (numeric));
144 if (FcPatternGetDouble (p, FC_PIXEL_SIZE, 0, &dbl) == FcResultMatch)
145 ASET (entity, FONT_SIZE_INDEX, make_number (dbl));
146 else
147 ASET (entity, FONT_SIZE_INDEX, make_number (0));
148
149 if (FcPatternGetInteger (p, FC_SPACING, 0, &numeric) != FcResultMatch)
150 numeric = -1;
151 file = FcStrCopy (file);
152 if (! file)
153 return Qnil;
154
155 p = FcPatternCreate ();
156 if (! p)
157 return Qnil;
158
159 if (FcPatternAddString (p, FC_FILE, file) == FcFalse
160 || (charset
161 && FcPatternAddCharSet (p, FC_CHARSET, charset) == FcFalse)
162 #ifdef FC_FONTFORMAT
163 || (fontformat
164 && FcPatternAddString (p, FC_FONTFORMAT, fontformat) == FcFalse)
165 #endif /* FC_FONTFORMAT */
166 || (numeric >= 0
167 && FcPatternAddInteger (p, FC_SPACING, numeric) == FcFalse))
168 {
169 FcPatternDestroy (p);
170 return Qnil;
171 }
172 ASET (entity, FONT_EXTRA_INDEX, make_save_value (p, 0));
173 return entity;
174 }
175
176 static Lisp_Object ftfont_generic_family_list;
177
178 static Lisp_Object
179 ftfont_list_generic_family (spec, frame, registry)
180 Lisp_Object spec, frame, registry;
181 {
182 Lisp_Object family = AREF (spec, FONT_FAMILY_INDEX);
183 Lisp_Object slot, list, val;
184
185 if (EQ (family, Qmono))
186 family = Qmonospace;
187 else if (EQ (family, Qsans) || EQ (family, Qsans__serif))
188 family = Qsans_serif;
189 slot = assq_no_quit (family, ftfont_generic_family_list);
190 if (! CONSP (slot))
191 return null_vector;
192 list = XCDR (slot);
193 if (EQ (list, Qt))
194 {
195 /* Not yet listed. */
196 FcObjectSet *objset = NULL;
197 FcPattern *pattern = NULL, *pat = NULL;
198 FcFontSet *fontset = NULL;
199 FcChar8 *fam;
200 int i, j;
201
202 objset = FcObjectSetBuild (FC_FOUNDRY, FC_FAMILY, FC_WEIGHT, FC_SLANT,
203 FC_WIDTH, FC_PIXEL_SIZE, FC_SPACING,
204 FC_CHARSET, FC_FILE,
205 #ifdef FC_FONTFORMAT
206 FC_FONTFORMAT,
207 #endif /* FC_FONTFORMAT */
208 NULL);
209 if (! objset)
210 goto err;
211 pattern = FcPatternBuild (NULL, FC_FAMILY, FcTypeString,
212 SYMBOL_FcChar8 (family), (char *) 0);
213 if (! pattern)
214 goto err;
215 pat = FcPatternCreate ();
216 if (! pat)
217 goto err;
218 FcConfigSubstitute (NULL, pattern, FcMatchPattern);
219 for (i = 0, val = Qnil;
220 FcPatternGetString (pattern, FC_FAMILY, i, &fam) == FcResultMatch;
221 i++)
222 {
223 if (strcmp ((char *) fam, (char *) SYMBOL_FcChar8 (family)) == 0)
224 continue;
225 if (! FcPatternAddString (pat, FC_FAMILY, fam))
226 goto err;
227 fontset = FcFontList (NULL, pat, objset);
228 if (! fontset)
229 goto err;
230 /* Here we build the list in reverse order so that the last
231 loop in this function build a list in the correct
232 order. */
233 for (j = 0; j < fontset->nfont; j++)
234 {
235 Lisp_Object entity;
236
237 entity = ftfont_pattern_entity (fontset->fonts[j],
238 frame, registry);
239 if (! NILP (entity))
240 val = Fcons (entity, val);
241 }
242 FcFontSetDestroy (fontset);
243 fontset = NULL;
244 FcPatternDel (pat, FC_FAMILY);
245 }
246 list = val;
247 XSETCDR (slot, list);
248 err:
249 if (pat) FcPatternDestroy (pat);
250 if (pattern) FcPatternDestroy (pattern);
251 if (fontset) FcFontSetDestroy (fontset);
252 if (objset) FcObjectSetDestroy (objset);
253 if (EQ (list, Qt))
254 return Qnil;
255 }
256 ASET (spec, FONT_FAMILY_INDEX, Qnil);
257 for (val = Qnil; CONSP (list); list = XCDR (list))
258 if (font_match_p (spec, XCAR (list)))
259 val = Fcons (XCAR (list), val);
260 ASET (spec, FONT_FAMILY_INDEX, family);
261 return Fvconcat (1, &val);
262 }
263
264
265 static Lisp_Object ftfont_get_cache P_ ((FRAME_PTR));
266 static Lisp_Object ftfont_list P_ ((Lisp_Object, Lisp_Object));
267 static Lisp_Object ftfont_match P_ ((Lisp_Object, Lisp_Object));
268 static Lisp_Object ftfont_list_family P_ ((Lisp_Object));
269 static void ftfont_free_entity P_ ((Lisp_Object));
270 static struct font *ftfont_open P_ ((FRAME_PTR, Lisp_Object, int));
271 static void ftfont_close P_ ((FRAME_PTR, struct font *));
272 static int ftfont_has_char P_ ((Lisp_Object, int));
273 static unsigned ftfont_encode_char P_ ((struct font *, int));
274 static int ftfont_text_extents P_ ((struct font *, unsigned *, int,
275 struct font_metrics *));
276 static int ftfont_get_bitmap P_ ((struct font *, unsigned,
277 struct font_bitmap *, int));
278 static int ftfont_anchor_point P_ ((struct font *, unsigned, int,
279 int *, int *));
280 static Lisp_Object ftfont_shape P_ ((Lisp_Object));
281
282 struct font_driver ftfont_driver =
283 {
284 0, /* Qfreetype */
285 ftfont_get_cache,
286 ftfont_list,
287 ftfont_match,
288 ftfont_list_family,
289 ftfont_free_entity,
290 ftfont_open,
291 ftfont_close,
292 /* We can't draw a text without device dependent functions. */
293 NULL,
294 NULL,
295 ftfont_has_char,
296 ftfont_encode_char,
297 ftfont_text_extents,
298 /* We can't draw a text without device dependent functions. */
299 NULL,
300 ftfont_get_bitmap,
301 NULL,
302 NULL,
303 NULL,
304 ftfont_anchor_point,
305 NULL,
306 NULL,
307 NULL,
308 NULL,
309 #if defined (HAVE_M17N_FLT) && defined (HAVE_LIBOTF)
310 ftfont_shape
311 #else /* not (HAVE_M17N_FLT && HAVE_LIBOTF) */
312 NULL
313 #endif /* not (HAVE_M17N_FLT && HAVE_LIBOTF) */
314 };
315
316 extern Lisp_Object QCname;
317
318 static Lisp_Object
319 ftfont_get_cache (f)
320 FRAME_PTR f;
321 {
322 return freetype_font_cache;
323 }
324
325 struct OpenTypeSpec
326 {
327 Lisp_Object script;
328 unsigned int script_tag, langsys_tag;
329 int nfeatures[2];
330 unsigned int *features[2];
331 };
332
333 #define OTF_SYM_TAG(SYM, TAG) \
334 do { \
335 unsigned char *p = SDATA (SYMBOL_NAME (SYM)); \
336 TAG = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]; \
337 } while (0)
338
339 #define OTF_TAG_STR(TAG, P) \
340 do { \
341 (P)[0] = (char) (TAG >> 24); \
342 (P)[1] = (char) ((TAG >> 16) & 0xFF); \
343 (P)[2] = (char) ((TAG >> 8) & 0xFF); \
344 (P)[3] = (char) (TAG & 0xFF); \
345 (P)[4] = '\0'; \
346 } while (0)
347
348 static struct OpenTypeSpec *
349 ftfont_get_open_type_spec (Lisp_Object otf_spec)
350 {
351 struct OpenTypeSpec *spec = malloc (sizeof (struct OpenTypeSpec));
352 Lisp_Object val;
353 int i, j, negative;
354
355 if (! spec)
356 return NULL;
357 spec->script = XCAR (otf_spec);
358 if (! NILP (spec->script))
359 {
360 OTF_SYM_TAG (spec->script, spec->script_tag);
361 val = assq_no_quit (spec->script, Votf_script_alist);
362 if (CONSP (val) && SYMBOLP (XCDR (val)))
363 spec->script = XCDR (val);
364 else
365 spec->script = Qnil;
366 }
367 else
368 spec->script_tag = 0x44464C54; /* "DFLT" */
369 otf_spec = XCDR (otf_spec);
370 val = XCAR (otf_spec);
371 if (! NILP (val))
372 OTF_SYM_TAG (val, spec->langsys_tag);
373 else
374 spec->langsys_tag = 0;
375 spec->nfeatures[0] = spec->nfeatures[1] = 0;
376 for (i = 0; i < 2; i++)
377 {
378 Lisp_Object len;
379
380 otf_spec = XCDR (otf_spec);
381 if (NILP (otf_spec))
382 break;
383 val = XCAR (otf_spec);
384 if (NILP (val))
385 continue;
386 len = Flength (val);
387 spec->features[i] = malloc (sizeof (int) * XINT (len));
388 if (! spec->features[i])
389 {
390 if (i > 0 && spec->features[0])
391 free (spec->features[0]);
392 free (spec);
393 return NULL;
394 }
395 for (j = 0, negative = 0; CONSP (val); val = XCDR (val))
396 {
397 if (NILP (XCAR (val)))
398 negative = 1;
399 else
400 {
401 unsigned int tag;
402
403 OTF_SYM_TAG (XCAR (val), tag);
404 spec->features[i][j++] = negative ? tag & 0x80000000 : tag;
405 }
406 }
407 spec->nfeatures[i] = j;
408 }
409 return spec;
410 }
411
412 static Lisp_Object
413 ftfont_list (frame, spec)
414 Lisp_Object frame, spec;
415 {
416 Lisp_Object val, tmp, extra;
417 int i;
418 FcPattern *pattern = NULL;
419 FcCharSet *charset = NULL;
420 FcLangSet *langset = NULL;
421 FcFontSet *fontset = NULL;
422 FcObjectSet *objset = NULL;
423 Lisp_Object script;
424 Lisp_Object registry = Qunicode_bmp;
425 struct OpenTypeSpec *otspec= NULL;
426 int weight = 0;
427 double dpi = -1;
428 int spacing = -1;
429 int scalable = -1;
430 char otlayout[15]; /* For "otlayout:XXXX" */
431
432 val = null_vector;
433
434 if (! fc_initialized)
435 {
436 FcInit ();
437 fc_initialized = 1;
438 }
439
440 if (! NILP (AREF (spec, FONT_ADSTYLE_INDEX))
441 && ! EQ (AREF (spec, FONT_ADSTYLE_INDEX), null_string))
442 return val;
443 if (! NILP (AREF (spec, FONT_SLANT_INDEX))
444 && XINT (AREF (spec, FONT_SLANT_INDEX)) < 100)
445 /* Fontconfig doesn't support reverse-italic/obligue. */
446 return val;
447
448 if (! NILP (AREF (spec, FONT_REGISTRY_INDEX)))
449 {
450 registry = AREF (spec, FONT_REGISTRY_INDEX);
451 if (EQ (registry, Qiso8859_1))
452 {
453 if (! cs_iso8859_1
454 && ftfont_build_basic_charsets () < 0)
455 return Qnil;
456 charset = cs_iso8859_1;
457 }
458 else if (! EQ (registry, Qiso10646_1)
459 && ! EQ (registry, Qunicode_bmp)
460 && ! EQ (registry, Qunicode_sip))
461 return val;
462 }
463
464 otlayout[0] = '\0';
465 script = Qnil;
466 for (extra = AREF (spec, FONT_EXTRA_INDEX);
467 CONSP (extra); extra = XCDR (extra))
468 {
469 Lisp_Object key, val;
470
471 tmp = XCAR (extra);
472 key = XCAR (tmp), val = XCDR (tmp);
473 if (EQ (key, QCotf))
474 {
475 otspec = ftfont_get_open_type_spec (val);
476 if (! otspec)
477 return null_vector;
478 strcat (otlayout, "otlayout:");
479 OTF_TAG_STR (otspec->script_tag, otlayout + 9);
480 script = otspec->script;
481 }
482 else if (EQ (key, QClanguage))
483 {
484 langset = FcLangSetCreate ();
485 if (! langset)
486 goto err;
487 if (SYMBOLP (val))
488 {
489 if (! FcLangSetAdd (langset, SYMBOL_FcChar8 (val)))
490 goto err;
491 }
492 else
493 for (; CONSP (val); val = XCDR (val))
494 if (SYMBOLP (XCAR (val))
495 && ! FcLangSetAdd (langset, SYMBOL_FcChar8 (XCAR (val))))
496 goto err;
497 }
498 else if (EQ (key, QCscript))
499 script = val;
500 else if (EQ (key, QCdpi))
501 dpi = XINT (val);
502 else if (EQ (key, QCspacing))
503 spacing = XINT (val);
504 else if (EQ (key, QCscalable))
505 scalable = ! NILP (val);
506 }
507
508 if (! NILP (script) && ! charset)
509 {
510 Lisp_Object chars = assq_no_quit (script, Vscript_representative_chars);
511
512 if (CONSP (chars))
513 {
514 charset = FcCharSetCreate ();
515 if (! charset)
516 goto err;
517 for (chars = XCDR (chars); CONSP (chars); chars = XCDR (chars))
518 if (CHARACTERP (XCAR (chars))
519 && ! FcCharSetAddChar (charset, XUINT (XCAR (chars))))
520 goto err;
521 }
522 }
523
524 pattern = FcPatternCreate ();
525 if (! pattern)
526 goto err;
527 tmp = AREF (spec, FONT_FOUNDRY_INDEX);
528 if (SYMBOLP (tmp) && ! NILP (tmp)
529 && ! FcPatternAddString (pattern, FC_FOUNDRY, SYMBOL_FcChar8 (tmp)))
530 goto err;
531 tmp = AREF (spec, FONT_FAMILY_INDEX);
532 if (SYMBOLP (tmp) && ! NILP (tmp)
533 && ! FcPatternAddString (pattern, FC_FAMILY, SYMBOL_FcChar8 (tmp)))
534 goto err;
535 /* Emacs conventionally doesn't distinguish normal, regular, and
536 medium weight, but fontconfig does. So, we can't restrict font
537 listing by weight. We check it after getting a list. */
538 tmp = AREF (spec, FONT_WEIGHT_INDEX);
539 if (INTEGERP (tmp))
540 weight = XINT (tmp);
541 tmp = AREF (spec, FONT_SLANT_INDEX);
542 if (INTEGERP (tmp)
543 && ! FcPatternAddInteger (pattern, FC_SLANT, XINT (tmp) - 100))
544 goto err;
545 tmp = AREF (spec, FONT_WIDTH_INDEX);
546 if (INTEGERP (tmp)
547 && ! FcPatternAddInteger (pattern, FC_WIDTH, XINT (tmp)))
548 goto err;
549
550 if (charset
551 && ! FcPatternAddCharSet (pattern, FC_CHARSET, charset))
552 goto err;
553 if (langset
554 && ! FcPatternAddLangSet (pattern, FC_LANG, langset))
555 goto err;
556 if (dpi >= 0
557 && ! FcPatternAddDouble (pattern, FC_DPI, dpi))
558 goto err;
559 if (spacing >= 0
560 && ! FcPatternAddInteger (pattern, FC_SPACING, spacing))
561 goto err;
562 if (scalable >= 0
563 && ! FcPatternAddBool (pattern, FC_SCALABLE, scalable ? FcTrue : FcFalse))
564 goto err;
565
566 objset = FcObjectSetBuild (FC_FOUNDRY, FC_FAMILY, FC_WEIGHT, FC_SLANT,
567 FC_WIDTH, FC_PIXEL_SIZE, FC_SPACING,
568 FC_CHARSET, FC_FILE,
569 #ifdef FC_FONTFORMAT
570 FC_FONTFORMAT,
571 #endif /* FC_FONTFORMAT */
572 NULL);
573 if (! objset)
574 goto err;
575 if (otlayout[0])
576 {
577 #ifdef FC_CAPABILITY
578 if (! FcObjectSetAdd (objset, FC_CAPABILITY))
579 goto err;
580 #else /* not FC_CAPABILITY */
581 goto finish;
582 #endif /* not FC_CAPABILITY */
583 }
584
585 fontset = FcFontList (NULL, pattern, objset);
586 if (! fontset)
587 goto err;
588
589 if (fontset->nfont > 0)
590 {
591 double pixel_size;
592
593 if (NILP (AREF (spec, FONT_SIZE_INDEX)))
594 pixel_size = 0;
595 else
596 pixel_size = XINT (AREF (spec, FONT_SIZE_INDEX));
597
598 for (i = 0, val = Qnil; i < fontset->nfont; i++)
599 {
600 Lisp_Object entity;
601
602 if (pixel_size > 0)
603 {
604 double this;
605
606 if (FcPatternGetDouble (fontset->fonts[i], FC_PIXEL_SIZE, 0,
607 &this) == FcResultMatch
608 && ((this < pixel_size - FONT_PIXEL_SIZE_QUANTUM)
609 || (this > pixel_size + FONT_PIXEL_SIZE_QUANTUM)))
610 continue;
611 }
612 if (weight > 0)
613 {
614 int this;
615
616 if (FcPatternGetInteger (fontset->fonts[i], FC_WEIGHT, 0,
617 &this) != FcResultMatch
618 || (this != weight
619 && (weight != 100
620 || this < FC_WEIGHT_REGULAR
621 || this > FC_WEIGHT_MEDIUM)))
622 continue;
623 }
624 #ifdef FC_CAPABILITY
625 if (otlayout[0])
626 {
627 FcChar8 *this;
628
629 if (FcPatternGetString (fontset->fonts[i], FC_CAPABILITY, 0,
630 &this) != FcResultMatch
631 || ! strstr ((char *) this, otlayout))
632 continue;
633 }
634 #endif /* FC_CAPABILITY */
635 #ifdef HAVE_LIBOTF
636 if (otspec)
637 {
638 FcChar8 *file;
639 OTF *otf;
640
641 if (FcPatternGetString (fontset->fonts[i], FC_FILE, 0, &file)
642 != FcResultMatch)
643 continue;
644 otf = OTF_open ((char *) file);
645 if (! otf)
646 continue;
647 if (OTF_check_features (otf, 1,
648 otspec->script_tag, otspec->langsys_tag,
649 otspec->features[0],
650 otspec->nfeatures[0]) != 1
651 || OTF_check_features (otf, 0,
652 otspec->script_tag, otspec->langsys_tag,
653 otspec->features[1],
654 otspec->nfeatures[1]) != 1)
655 continue;
656 }
657 #endif /* HAVE_LIBOTF */
658 entity = ftfont_pattern_entity (fontset->fonts[i], frame, registry);
659 if (! NILP (entity))
660 val = Fcons (entity, val);
661 }
662 val = Fvconcat (1, &val);
663 }
664 else if (! NILP (AREF (spec, FONT_FAMILY_INDEX)))
665 val = ftfont_list_generic_family (spec, frame, registry);
666 goto finish;
667
668 err:
669 /* We come here because of unexpected error in fontconfig API call
670 (usually insufficient memory). */
671 val = Qnil;
672
673 finish:
674 if (charset && charset != cs_iso8859_1) FcCharSetDestroy (charset);
675 if (objset) FcObjectSetDestroy (objset);
676 if (fontset) FcFontSetDestroy (fontset);
677 if (langset) FcLangSetDestroy (langset);
678 if (pattern) FcPatternDestroy (pattern);
679 if (otspec)
680 {
681 if (otspec->nfeatures[0] > 0)
682 free (otspec->features[0]);
683 if (otspec->nfeatures[1] > 0)
684 free (otspec->features[1]);
685 free (otspec);
686 }
687 return val;
688 }
689
690 static Lisp_Object
691 ftfont_match (frame, spec)
692 Lisp_Object frame, spec;
693 {
694 Lisp_Object extra, val, entity;
695 FcPattern *pattern = NULL, *match = NULL;
696 FcResult result;
697
698 if (! fc_initialized)
699 {
700 FcInit ();
701 fc_initialized = 1;
702 }
703
704 extra = AREF (spec, FONT_EXTRA_INDEX);
705 val = assq_no_quit (QCname, extra);
706 if (! CONSP (val) || ! STRINGP (XCDR (val)))
707 return Qnil;
708
709 entity = Qnil;
710 pattern = FcNameParse (SDATA (XCDR (val)));
711 if (pattern)
712 {
713 if (INTEGERP (AREF (spec, FONT_SIZE_INDEX)))
714 {
715 FcValue value;
716
717 value.type = FcTypeDouble;
718 value.u.d = XINT (AREF (spec, FONT_SIZE_INDEX));
719 FcPatternAdd (pattern, FC_PIXEL_SIZE, value, FcFalse);
720 }
721 if (FcConfigSubstitute (NULL, pattern, FcMatchPattern) == FcTrue)
722 {
723 FcDefaultSubstitute (pattern);
724 match = FcFontMatch (NULL, pattern, &result);
725 if (match)
726 {
727 entity = ftfont_pattern_entity (match, frame, Qunicode_bmp);
728 FcPatternDestroy (match);
729 }
730 }
731 FcPatternDestroy (pattern);
732 }
733
734 return entity;
735 }
736
737 static Lisp_Object
738 ftfont_list_family (frame)
739 Lisp_Object frame;
740 {
741 Lisp_Object list;
742 FcPattern *pattern = NULL;
743 FcFontSet *fontset = NULL;
744 FcObjectSet *objset = NULL;
745 int i;
746
747 if (! fc_initialized)
748 {
749 FcInit ();
750 fc_initialized = 1;
751 }
752
753 pattern = FcPatternCreate ();
754 if (! pattern)
755 goto finish;
756 objset = FcObjectSetBuild (FC_FAMILY, NULL);
757 if (! objset)
758 goto finish;
759 fontset = FcFontList (NULL, pattern, objset);
760 if (! fontset)
761 goto finish;
762
763 list = Qnil;
764 for (i = 0; i < fontset->nfont; i++)
765 {
766 FcPattern *pat = fontset->fonts[i];
767 FcChar8 *str;
768
769 if (FcPatternGetString (pat, FC_FAMILY, 0, &str) == FcResultMatch)
770 list = Fcons (intern_downcase ((char *) str, strlen ((char *) str)),
771 list);
772 }
773
774 finish:
775 if (objset) FcObjectSetDestroy (objset);
776 if (fontset) FcFontSetDestroy (fontset);
777 if (pattern) FcPatternDestroy (pattern);
778
779 return list;
780 }
781
782
783 static void
784 ftfont_free_entity (entity)
785 Lisp_Object entity;
786 {
787 Lisp_Object val = AREF (entity, FONT_EXTRA_INDEX);
788 FcPattern *pattern = XSAVE_VALUE (val)->pointer;
789
790 FcPatternDestroy (pattern);
791 }
792
793 static struct font *
794 ftfont_open (f, entity, pixel_size)
795 FRAME_PTR f;
796 Lisp_Object entity;
797 int pixel_size;
798 {
799 struct ftfont_info *ftfont_info;
800 struct font *font;
801 FT_Face ft_face;
802 FT_Size ft_size;
803 FT_UInt size;
804 Lisp_Object val;
805 FcPattern *pattern;
806 FcChar8 *file;
807 int spacing;
808 char *name;
809 int len;
810
811 val = AREF (entity, FONT_EXTRA_INDEX);
812 if (XTYPE (val) != Lisp_Misc
813 || XMISCTYPE (val) != Lisp_Misc_Save_Value)
814 return NULL;
815 pattern = XSAVE_VALUE (val)->pointer;
816 if (XSAVE_VALUE (val)->integer == 0)
817 {
818 /* We have not yet created FT_Face for this font. */
819 if (! ft_library
820 && FT_Init_FreeType (&ft_library) != 0)
821 return NULL;
822 if (FcPatternGetString (pattern, FC_FILE, 0, &file) != FcResultMatch)
823 return NULL;
824 if (FT_New_Face (ft_library, (char *) file, 0, &ft_face) != 0)
825 return NULL;
826 FcPatternAddFTFace (pattern, FC_FT_FACE, ft_face);
827 ft_size = ft_face->size;
828 }
829 else
830 {
831 if (FcPatternGetFTFace (pattern, FC_FT_FACE, 0, &ft_face)
832 != FcResultMatch)
833 return NULL;
834 if (FT_New_Size (ft_face, &ft_size) != 0)
835 return NULL;
836 if (FT_Activate_Size (ft_size) != 0)
837 {
838 FT_Done_Size (ft_size);
839 return NULL;
840 }
841 }
842
843 size = XINT (AREF (entity, FONT_SIZE_INDEX));
844 if (size == 0)
845 size = pixel_size;
846 if (FT_Set_Pixel_Sizes (ft_face, size, size) != 0)
847 {
848 if (XSAVE_VALUE (val)->integer == 0)
849 FT_Done_Face (ft_face);
850 return NULL;
851 }
852
853 ftfont_info = malloc (sizeof (struct ftfont_info));
854 if (! ftfont_info)
855 return NULL;
856 ftfont_info->ft_size = ft_size;
857 #ifdef HAVE_LIBOTF
858 ftfont_info->maybe_otf = ft_face->face_flags & FT_FACE_FLAG_SFNT;
859 ftfont_info->otf = NULL;
860 #endif /* HAVE_LIBOTF */
861
862 font = (struct font *) ftfont_info;
863 font->format = ftfont_font_format (pattern);
864 font->entity = entity;
865 font->pixel_size = size;
866 font->driver = &ftfont_driver;
867 len = 96;
868 name = malloc (len);
869 while (name && font_unparse_fcname (entity, pixel_size, name, len) < 0)
870 {
871 char *new = realloc (name, len += 32);
872
873 if (! new)
874 free (name);
875 name = new;
876 }
877 font->font.full_name = font->font.name = name;
878 font->file_name = (char *) file;
879 font->font.size = ft_face->size->metrics.max_advance >> 6;
880 if (font->font.size <= 0)
881 font->font.size = size;
882 font->font.charset = font->encoding_charset = font->repertory_charset = -1;
883 font->ascent = ft_face->size->metrics.ascender >> 6;
884 font->descent = - ft_face->size->metrics.descender >> 6;
885 font->font.height = font->ascent + font->descent;
886 if (FcPatternGetInteger (pattern, FC_SPACING, 0, &spacing) != FcResultMatch)
887 spacing = FC_PROPORTIONAL;
888 if (spacing != FC_PROPORTIONAL)
889 font->font.average_width = font->font.space_width = font->font.size;
890 else
891 {
892 int i;
893
894 font->font.average_width = font->font.space_width = 0;
895 for (i = 32; i < 127; i++)
896 {
897 if (FT_Load_Char (ft_face, i, FT_LOAD_DEFAULT) != 0)
898 break;
899 if (i == 32)
900 font->font.space_width = ft_face->glyph->metrics.horiAdvance >> 6;
901 font->font.average_width += ft_face->glyph->metrics.horiAdvance >> 6;
902 }
903 if (i == 127)
904 {
905 /* The font contains all ASCII printable characters. */
906 font->font.average_width /= 95;
907 }
908 else
909 {
910 if (i == 32)
911 font->font.space_width = font->font.size;
912 font->font.average_width = font->font.size;
913 }
914 }
915
916 /* Unfortunately FreeType doesn't provide a way to get minimum char
917 width. So, we use space_width instead. */
918 font->min_width = font->font.space_width;
919
920 font->font.baseline_offset = 0;
921 font->font.relative_compose = 0;
922 font->font.default_ascent = 0;
923 font->font.vertical_centering = 0;
924
925 (XSAVE_VALUE (val)->integer)++;
926
927 return font;
928 }
929
930 static void
931 ftfont_close (f, font)
932 FRAME_PTR f;
933 struct font *font;
934 {
935 struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
936 Lisp_Object entity = font->entity;
937 Lisp_Object val = AREF (entity, FONT_EXTRA_INDEX);
938
939 (XSAVE_VALUE (val)->integer)--;
940 if (XSAVE_VALUE (val)->integer == 0)
941 {
942 FT_Done_Face (ftfont_info->ft_size->face);
943 #ifdef HAVE_LIBOTF
944 if (ftfont_info->otf)
945 OTF_close (ftfont_info->otf);
946 #endif
947 }
948 else
949 FT_Done_Size (ftfont_info->ft_size);
950
951 free (font);
952 }
953
954 static int
955 ftfont_has_char (entity, c)
956 Lisp_Object entity;
957 int c;
958 {
959 Lisp_Object val;
960 FcPattern *pattern;
961 FcCharSet *charset;
962
963 val = AREF (entity, FONT_EXTRA_INDEX);
964 pattern = XSAVE_VALUE (val)->pointer;
965 if (FcPatternGetCharSet (pattern, FC_CHARSET, 0, &charset) != FcResultMatch)
966 return -1;
967 return (FcCharSetHasChar (charset, (FcChar32) c) == FcTrue);
968 }
969
970 static unsigned
971 ftfont_encode_char (font, c)
972 struct font *font;
973 int c;
974 {
975 struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
976 FT_Face ft_face = ftfont_info->ft_size->face;
977 FT_ULong charcode = c;
978 FT_UInt code = FT_Get_Char_Index (ft_face, charcode);
979
980 return (code > 0 ? code : FONT_INVALID_CODE);
981 }
982
983 static int
984 ftfont_text_extents (font, code, nglyphs, metrics)
985 struct font *font;
986 unsigned *code;
987 int nglyphs;
988 struct font_metrics *metrics;
989 {
990 struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
991 FT_Face ft_face = ftfont_info->ft_size->face;
992 int width = 0;
993 int i;
994
995 if (ftfont_info->ft_size != ft_face->size)
996 FT_Activate_Size (ftfont_info->ft_size);
997 if (metrics)
998 bzero (metrics, sizeof (struct font_metrics));
999 for (i = 0; i < nglyphs; i++)
1000 {
1001 if (FT_Load_Glyph (ft_face, code[i], FT_LOAD_DEFAULT) == 0)
1002 {
1003 FT_Glyph_Metrics *m = &ft_face->glyph->metrics;
1004
1005 if (metrics)
1006 {
1007 if (metrics->lbearing > width + (m->horiBearingX >> 6))
1008 metrics->lbearing = width + (m->horiBearingX >> 6);
1009 if (metrics->rbearing
1010 < width + ((m->horiBearingX + m->width) >> 6))
1011 metrics->rbearing
1012 = width + ((m->horiBearingX + m->width) >> 6);
1013 if (metrics->ascent < (m->horiBearingY >> 6))
1014 metrics->ascent = m->horiBearingY >> 6;
1015 if (metrics->descent > ((m->horiBearingY + m->height) >> 6))
1016 metrics->descent = (m->horiBearingY + m->height) >> 6;
1017 }
1018 width += m->horiAdvance >> 6;
1019 }
1020 else
1021 {
1022 width += font->font.space_width;
1023 }
1024 }
1025 if (metrics)
1026 metrics->width = width;
1027
1028 return width;
1029 }
1030
1031 static int
1032 ftfont_get_bitmap (font, code, bitmap, bits_per_pixel)
1033 struct font *font;
1034 unsigned code;
1035 struct font_bitmap *bitmap;
1036 int bits_per_pixel;
1037 {
1038 struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
1039 FT_Face ft_face = ftfont_info->ft_size->face;
1040 FT_Int32 load_flags = FT_LOAD_RENDER;
1041
1042 if (ftfont_info->ft_size != ft_face->size)
1043 FT_Activate_Size (ftfont_info->ft_size);
1044 if (bits_per_pixel == 1)
1045 {
1046 #ifdef FT_LOAD_TARGET_MONO
1047 load_flags |= FT_LOAD_TARGET_MONO;
1048 #else
1049 load_flags |= FT_LOAD_MONOCHROME;
1050 #endif
1051 }
1052 else if (bits_per_pixel != 8)
1053 /* We don't support such a rendering. */
1054 return -1;
1055
1056 if (FT_Load_Glyph (ft_face, code, load_flags) != 0)
1057 return -1;
1058 bitmap->bits_per_pixel
1059 = (ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO ? 1
1060 : ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_GRAY ? 8
1061 : ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_LCD ? 8
1062 : ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_LCD_V ? 8
1063 : -1);
1064 if (bitmap->bits_per_pixel < 0)
1065 /* We don't suport that kind of pixel mode. */
1066 return -1;
1067 bitmap->rows = ft_face->glyph->bitmap.rows;
1068 bitmap->width = ft_face->glyph->bitmap.width;
1069 bitmap->pitch = ft_face->glyph->bitmap.pitch;
1070 bitmap->buffer = ft_face->glyph->bitmap.buffer;
1071 bitmap->left = ft_face->glyph->bitmap_left;
1072 bitmap->top = ft_face->glyph->bitmap_top;
1073 bitmap->advance = ft_face->glyph->metrics.horiAdvance >> 6;
1074 bitmap->extra = NULL;
1075
1076 return 0;
1077 }
1078
1079 static int
1080 ftfont_anchor_point (font, code, index, x, y)
1081 struct font *font;
1082 unsigned code;
1083 int index;
1084 int *x, *y;
1085 {
1086 struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
1087 FT_Face ft_face = ftfont_info->ft_size->face;
1088
1089 if (ftfont_info->ft_size != ft_face->size)
1090 FT_Activate_Size (ftfont_info->ft_size);
1091 if (FT_Load_Glyph (ft_face, code, FT_LOAD_DEFAULT) != 0)
1092 return -1;
1093 if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
1094 return -1;
1095 if (index >= ft_face->glyph->outline.n_points)
1096 return -1;
1097 *x = ft_face->glyph->outline.points[index].x;
1098 *y = ft_face->glyph->outline.points[index].y;
1099 return 0;
1100 }
1101
1102 #ifdef HAVE_LIBOTF
1103 #ifdef HAVE_M17N_FLT
1104
1105 struct MFLTFontFT
1106 {
1107 MFLTFont flt_font;
1108 struct font *font;
1109 FT_Face ft_face;
1110 OTF *otf;
1111 };
1112
1113 static int
1114 ftfont_get_glyph_id (font, gstring, from, to)
1115 MFLTFont *font;
1116 MFLTGlyphString *gstring;
1117 int from, to;
1118 {
1119 struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
1120 FT_Face ft_face = flt_font_ft->ft_face;
1121 MFLTGlyph *g;
1122
1123 for (g = gstring->glyphs + from; from < to; g++, from++)
1124 if (! g->encoded)
1125 {
1126 FT_UInt code = FT_Get_Char_Index (ft_face, g->code);
1127
1128 g->code = code > 0 ? code : FONT_INVALID_CODE;
1129 g->encoded = 1;
1130 }
1131 return 0;
1132 }
1133
1134 static int
1135 ftfont_get_metrics (font, gstring, from, to)
1136 MFLTFont *font;
1137 MFLTGlyphString *gstring;
1138 int from, to;
1139 {
1140 struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
1141 FT_Face ft_face = flt_font_ft->ft_face;
1142 MFLTGlyph *g;
1143
1144 for (g = gstring->glyphs + from; from < to; g++, from++)
1145 if (! g->measured)
1146 {
1147 if (g->code != FONT_INVALID_CODE)
1148 {
1149 FT_Glyph_Metrics *m;
1150
1151 if (FT_Load_Glyph (ft_face, g->code, FT_LOAD_DEFAULT) != 0)
1152 abort ();
1153 m = &ft_face->glyph->metrics;
1154
1155 g->lbearing = m->horiBearingX;
1156 g->rbearing = m->horiBearingX + m->width;
1157 g->ascent = m->horiBearingY;
1158 g->descent = m->height - m->horiBearingY;
1159 g->xadv = m->horiAdvance;
1160 }
1161 else
1162 {
1163 g->lbearing = 0;
1164 g->rbearing = g->xadv = flt_font_ft->font->font.space_width << 6;
1165 g->ascent = flt_font_ft->font->ascent << 6;
1166 g->descent = flt_font_ft->font->descent << 6;
1167 }
1168 g->yadv = 0;
1169 g->measured = 1;
1170 }
1171 return 0;
1172 }
1173
1174 static int
1175 ftfont_check_otf (MFLTFont *font, MFLTOtfSpec *spec)
1176 {
1177 struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
1178 OTF *otf = flt_font_ft->otf;
1179 OTF_Tag *tags;
1180 int i, n, negative;
1181
1182 for (i = 0; i < 2; i++)
1183 {
1184 if (! spec->features[i])
1185 continue;
1186 for (n = 0; spec->features[i][n]; n++);
1187 tags = alloca (sizeof (OTF_Tag) * n);
1188 for (n = 0, negative = 0; spec->features[i][n]; n++)
1189 {
1190 if (spec->features[i][n] == 0xFFFFFFFF)
1191 negative = 1;
1192 else if (negative)
1193 tags[n - 1] = spec->features[i][n] | 0x80000000;
1194 else
1195 tags[n] = spec->features[i][n];
1196 }
1197 if (n - negative > 0
1198 && OTF_check_features (otf, i == 0, spec->script, spec->langsys,
1199 tags, n - negative) != 1)
1200 return 0;
1201 }
1202 return 1;
1203 }
1204
1205 #define DEVICE_DELTA(table, size) \
1206 (((size) >= (table).StartSize && (size) <= (table).EndSize) \
1207 ? (table).DeltaValue[(size) - (table).StartSize] << 6 \
1208 : 0)
1209
1210 static void
1211 adjust_anchor (FT_Face ft_face, OTF_Anchor *anchor,
1212 unsigned code, int x_ppem, int y_ppem, int *x, int *y)
1213 {
1214 if (anchor->AnchorFormat == 2)
1215 {
1216 FT_Outline *outline;
1217 int ap = anchor->f.f1.AnchorPoint;
1218
1219 FT_Load_Glyph (ft_face, (FT_UInt) code, FT_LOAD_MONOCHROME);
1220 outline = &ft_face->glyph->outline;
1221 if (ap < outline->n_points)
1222 {
1223 *x = outline->points[ap].x << 6;
1224 *y = outline->points[ap].y << 6;
1225 }
1226 }
1227 else if (anchor->AnchorFormat == 3)
1228 {
1229 if (anchor->f.f2.XDeviceTable.offset)
1230 *x += DEVICE_DELTA (anchor->f.f2.XDeviceTable, x_ppem);
1231 if (anchor->f.f2.YDeviceTable.offset)
1232 *y += DEVICE_DELTA (anchor->f.f2.YDeviceTable, y_ppem);
1233 }
1234 }
1235
1236 static OTF_GlyphString otf_gstring;
1237
1238 static int
1239 ftfont_drive_otf (font, spec, in, from, to, out, adjustment)
1240 MFLTFont *font;
1241 MFLTOtfSpec *spec;
1242 MFLTGlyphString *in;
1243 int from, to;
1244 MFLTGlyphString *out;
1245 MFLTGlyphAdjustment *adjustment;
1246 {
1247 struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
1248 FT_Face ft_face = flt_font_ft->ft_face;
1249 OTF *otf = flt_font_ft->otf;
1250 int len = to - from;
1251 int i, j, gidx;
1252 OTF_Glyph *otfg;
1253 char script[5], *langsys = NULL;
1254 char *gsub_features = NULL, *gpos_features = NULL;
1255
1256 if (len == 0)
1257 return from;
1258 OTF_tag_name (spec->script, script);
1259 if (spec->langsys)
1260 {
1261 langsys = alloca (5);
1262 OTF_tag_name (spec->langsys, langsys);
1263 }
1264 for (i = 0; i < 2; i++)
1265 {
1266 char *p;
1267
1268 if (spec->features[i] && spec->features[i][1] != 0xFFFFFFFF)
1269 {
1270 for (j = 0; spec->features[i][j]; j++);
1271 if (i == 0)
1272 p = gsub_features = alloca (6 * j);
1273 else
1274 p = gpos_features = alloca (6 * j);
1275 for (j = 0; spec->features[i][j]; j++)
1276 {
1277 if (spec->features[i][j] == 0xFFFFFFFF)
1278 *p++ = '*', *p++ = ',';
1279 else
1280 {
1281 OTF_tag_name (spec->features[i][j], p);
1282 p[4] = ',';
1283 p += 5;
1284 }
1285 }
1286 *--p = '\0';
1287 }
1288 }
1289
1290 if (otf_gstring.size == 0)
1291 {
1292 otf_gstring.glyphs = (OTF_Glyph *) malloc (sizeof (OTF_Glyph) * len);
1293 otf_gstring.size = len;
1294 }
1295 else if (otf_gstring.size < len)
1296 {
1297 otf_gstring.glyphs = (OTF_Glyph *) realloc (otf_gstring.glyphs,
1298 sizeof (OTF_Glyph) * len);
1299 otf_gstring.size = len;
1300 }
1301 otf_gstring.used = len;
1302 memset (otf_gstring.glyphs, 0, sizeof (OTF_Glyph) * len);
1303 for (i = 0; i < len; i++)
1304 {
1305 otf_gstring.glyphs[i].c = in->glyphs[from + i].c;
1306 otf_gstring.glyphs[i].glyph_id = in->glyphs[from + i].code;
1307 }
1308
1309 OTF_drive_gdef (otf, &otf_gstring);
1310 gidx = out->used;
1311
1312 if (gsub_features)
1313 {
1314 if (OTF_drive_gsub (otf, &otf_gstring, script, langsys, gsub_features)
1315 < 0)
1316 goto simple_copy;
1317 if (out->allocated < out->used + otf_gstring.used)
1318 return -2;
1319 for (i = 0, otfg = otf_gstring.glyphs; i < otf_gstring.used; )
1320 {
1321 OTF_Glyph *endg;
1322 MFLTGlyph *g;
1323 int min_from, max_to;
1324 int j;
1325
1326 g = out->glyphs + out->used;
1327 *g = in->glyphs[from + otfg->f.index.from];
1328 if (g->code != otfg->glyph_id)
1329 {
1330 g->c = 0;
1331 g->code = otfg->glyph_id;
1332 g->measured = 0;
1333 }
1334 out->used++;
1335 min_from = g->from;
1336 max_to = g->to;
1337 if (otfg->f.index.from < otfg->f.index.to)
1338 {
1339 /* OTFG substitutes multiple glyphs in IN. */
1340 for (j = from + otfg->f.index.from + 1;
1341 j <= from + otfg->f.index.to; j++)
1342 {
1343 if (min_from > in->glyphs[j].from)
1344 min_from = in->glyphs[j].from;
1345 if (max_to < in->glyphs[j].to)
1346 max_to = in->glyphs[j].to;
1347 }
1348 g->from = min_from;
1349 g->to = max_to;
1350 }
1351 for (i++, otfg++; (i < otf_gstring.used
1352 && otfg->f.index.from == otfg[-1].f.index.from);
1353 i++, otfg++)
1354 {
1355 g = out->glyphs + out->used;
1356 *g = in->glyphs[from + otfg->f.index.to];
1357 if (g->code != otfg->glyph_id)
1358 {
1359 g->c = 0;
1360 g->code = otfg->glyph_id;
1361 g->measured = 0;
1362 }
1363 out->used++;
1364 }
1365 }
1366 }
1367 else
1368 {
1369 if (out->allocated < out->used + len)
1370 return -2;
1371 for (i = 0; i < len; i++)
1372 out->glyphs[out->used++] = in->glyphs[from + i];
1373 }
1374
1375 if (gpos_features)
1376 {
1377 MFLTGlyph *base = NULL, *mark = NULL, *g;
1378 int x_ppem, y_ppem, x_scale, y_scale;
1379
1380 if (OTF_drive_gpos (otf, &otf_gstring, script, langsys, gpos_features)
1381 < 0)
1382 return to;
1383
1384 x_ppem = ft_face->size->metrics.x_ppem;
1385 y_ppem = ft_face->size->metrics.y_ppem;
1386 x_scale = ft_face->size->metrics.x_scale;
1387 y_scale = ft_face->size->metrics.y_scale;
1388
1389 for (i = 0, otfg = otf_gstring.glyphs, g = out->glyphs + gidx;
1390 i < otf_gstring.used; i++, otfg++, g++)
1391 {
1392 MFLTGlyph *prev;
1393
1394 if (! otfg->glyph_id)
1395 continue;
1396 switch (otfg->positioning_type)
1397 {
1398 case 0:
1399 break;
1400 case 1: /* Single */
1401 case 2: /* Pair */
1402 {
1403 int format = otfg->f.f1.format;
1404
1405 if (format & OTF_XPlacement)
1406 adjustment[i].xoff
1407 = otfg->f.f1.value->XPlacement * x_scale / 0x10000;
1408 if (format & OTF_XPlaDevice)
1409 adjustment[i].xoff
1410 += DEVICE_DELTA (otfg->f.f1.value->XPlaDevice, x_ppem);
1411 if (format & OTF_YPlacement)
1412 adjustment[i].yoff
1413 = - (otfg->f.f1.value->YPlacement * y_scale / 0x10000);
1414 if (format & OTF_YPlaDevice)
1415 adjustment[i].yoff
1416 -= DEVICE_DELTA (otfg->f.f1.value->YPlaDevice, y_ppem);
1417 if (format & OTF_XAdvance)
1418 adjustment[i].xadv
1419 += otfg->f.f1.value->XAdvance * x_scale / 0x10000;
1420 if (format & OTF_XAdvDevice)
1421 adjustment[i].xadv
1422 += DEVICE_DELTA (otfg->f.f1.value->XAdvDevice, x_ppem);
1423 if (format & OTF_YAdvance)
1424 adjustment[i].yadv
1425 += otfg->f.f1.value->YAdvance * y_scale / 0x10000;
1426 if (format & OTF_YAdvDevice)
1427 adjustment[i].yadv
1428 += DEVICE_DELTA (otfg->f.f1.value->YAdvDevice, y_ppem);
1429 adjustment[i].set = 1;
1430 }
1431 break;
1432 case 3: /* Cursive */
1433 /* Not yet supported. */
1434 break;
1435 case 4: /* Mark-to-Base */
1436 case 5: /* Mark-to-Ligature */
1437 if (! base)
1438 break;
1439 prev = base;
1440 goto label_adjust_anchor;
1441 default: /* i.e. case 6 Mark-to-Mark */
1442 if (! mark)
1443 break;
1444 prev = mark;
1445
1446 label_adjust_anchor:
1447 {
1448 int base_x, base_y, mark_x, mark_y;
1449 int this_from, this_to;
1450
1451 base_x = otfg->f.f4.base_anchor->XCoordinate * x_scale / 0x10000;
1452 base_y = otfg->f.f4.base_anchor->YCoordinate * y_scale / 0x10000;
1453 mark_x = otfg->f.f4.mark_anchor->XCoordinate * x_scale / 0x10000;
1454 mark_y = otfg->f.f4.mark_anchor->YCoordinate * y_scale / 0x10000;;
1455
1456 if (otfg->f.f4.base_anchor->AnchorFormat != 1)
1457 adjust_anchor (ft_face, otfg->f.f4.base_anchor,
1458 prev->code, x_ppem, y_ppem, &base_x, &base_y);
1459 if (otfg->f.f4.mark_anchor->AnchorFormat != 1)
1460 adjust_anchor (ft_face, otfg->f.f4.mark_anchor, g->code,
1461 x_ppem, y_ppem, &mark_x, &mark_y);
1462 adjustment[i].xoff = (base_x - mark_x);
1463 adjustment[i].yoff = - (base_y - mark_y);
1464 adjustment[i].back = (g - prev);
1465 adjustment[i].xadv = 0;
1466 adjustment[i].advance_is_absolute = 1;
1467 adjustment[i].set = 1;
1468 this_from = g->from;
1469 this_to = g->to;
1470 for (j = 0; prev + j < g; j++)
1471 {
1472 if (this_from > prev[j].from)
1473 this_from = prev[j].from;
1474 if (this_to < prev[j].to)
1475 this_to = prev[j].to;
1476 }
1477 for (; prev <= g; prev++)
1478 {
1479 prev->from = this_from;
1480 prev->to = this_to;
1481 }
1482 }
1483 }
1484 if (otfg->GlyphClass == OTF_GlyphClass0)
1485 base = mark = g;
1486 else if (otfg->GlyphClass == OTF_GlyphClassMark)
1487 mark = g;
1488 else
1489 base = g;
1490 }
1491 }
1492 return to;
1493
1494 simple_copy:
1495 if (out->allocated < out->used + len)
1496 return -2;
1497 font->get_metrics (font, in, from, to);
1498 memcpy (out->glyphs + out->used, in->glyphs + from,
1499 sizeof (MFLTGlyph) * len);
1500 out->used += len;
1501 return to;
1502 }
1503
1504 static MFLTGlyphString gstring;
1505
1506 static int m17n_flt_initialized;
1507
1508 extern Lisp_Object QCfamily;
1509
1510 Lisp_Object
1511 ftfont_shape_by_flt (lgstring, font, ft_face, otf)
1512 Lisp_Object lgstring;
1513 struct font *font;
1514 FT_Face ft_face;
1515 OTF *otf;
1516 {
1517 EMACS_UINT len = LGSTRING_LENGTH (lgstring);
1518 EMACS_UINT i;
1519 struct MFLTFontFT flt_font_ft;
1520
1521 if (! m17n_flt_initialized)
1522 {
1523 M17N_INIT ();
1524 m17n_flt_initialized = 1;
1525 }
1526
1527 for (i = 0; i < len; i++)
1528 if (NILP (LGSTRING_GLYPH (lgstring, i)))
1529 break;
1530 len = i;
1531
1532 if (gstring.allocated == 0)
1533 {
1534 gstring.allocated = len * 2;
1535 gstring.glyph_size = sizeof (MFLTGlyph);
1536 gstring.glyphs = malloc (sizeof (MFLTGlyph) * gstring.allocated);
1537 }
1538 else if (gstring.allocated < len * 2)
1539 {
1540 gstring.allocated = len * 2;
1541 gstring.glyphs = realloc (gstring.glyphs,
1542 sizeof (MFLTGlyph) * gstring.allocated);
1543 }
1544 for (i = 0; i < len; i++)
1545 gstring.glyphs[i].c = LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, i));
1546 gstring.used = len;
1547 gstring.r2l = 0;
1548
1549 {
1550 Lisp_Object family = Ffont_get (LGSTRING_FONT (lgstring), QCfamily);
1551
1552 if (NILP (family))
1553 flt_font_ft.flt_font.family = Mnil;
1554 else
1555 flt_font_ft.flt_font.family = msymbol (SDATA (SYMBOL_NAME (family)));
1556 }
1557 flt_font_ft.flt_font.x_ppem = ft_face->size->metrics.x_ppem;
1558 flt_font_ft.flt_font.y_ppem = ft_face->size->metrics.y_ppem;
1559 flt_font_ft.flt_font.get_glyph_id = ftfont_get_glyph_id;
1560 flt_font_ft.flt_font.get_metrics = ftfont_get_metrics;
1561 flt_font_ft.flt_font.check_otf = ftfont_check_otf;
1562 flt_font_ft.flt_font.drive_otf = ftfont_drive_otf;
1563 flt_font_ft.flt_font.internal = NULL;
1564 flt_font_ft.font = font;
1565 flt_font_ft.ft_face = ft_face;
1566 flt_font_ft.otf = otf;
1567 for (i = 0; i < 3; i++)
1568 {
1569 int result = mflt_run (&gstring, 0, len, &flt_font_ft.flt_font, NULL);
1570 if (result != -2)
1571 break;
1572 gstring.allocated += gstring.allocated;
1573 gstring.glyphs = realloc (gstring.glyphs,
1574 sizeof (MFLTGlyph) * gstring.allocated);
1575 }
1576 if (gstring.used > LGSTRING_LENGTH (lgstring))
1577 return Qnil;
1578 for (i = 0; i < gstring.used; i++)
1579 {
1580 MFLTGlyph *g = gstring.glyphs + i;
1581
1582 g->from = LGLYPH_FROM (LGSTRING_GLYPH (lgstring, g->from));
1583 g->to = LGLYPH_TO (LGSTRING_GLYPH (lgstring, g->to));
1584 }
1585
1586 for (i = 0; i < gstring.used; i++)
1587 {
1588 Lisp_Object lglyph = LGSTRING_GLYPH (lgstring, i);
1589 MFLTGlyph *g = gstring.glyphs + i;
1590
1591 if (NILP (lglyph))
1592 {
1593 lglyph = Fmake_vector (make_number (LGLYPH_SIZE), Qnil);
1594 LGSTRING_SET_GLYPH (lgstring, i, lglyph);
1595 }
1596 LGLYPH_SET_FROM (lglyph, g->from);
1597 LGLYPH_SET_TO (lglyph, g->to);
1598 LGLYPH_SET_CHAR (lglyph, g->c);
1599 LGLYPH_SET_CODE (lglyph, g->code);
1600 LGLYPH_SET_WIDTH (lglyph, g->xadv >> 6);
1601 LGLYPH_SET_LBEARING (lglyph, g->lbearing >> 6);
1602 LGLYPH_SET_RBEARING (lglyph, g->rbearing >> 6);
1603 LGLYPH_SET_ASCENT (lglyph, g->ascent >> 6);
1604 LGLYPH_SET_DESCENT (lglyph, g->descent >> 6);
1605 if (g->adjusted)
1606 {
1607 Lisp_Object vec;
1608
1609 vec = Fmake_vector (make_number (3), Qnil);
1610 ASET (vec, 0, make_number (g->xoff >> 6));
1611 ASET (vec, 1, make_number (g->yoff >> 6));
1612 ASET (vec, 2, make_number (g->xadv >> 6));
1613 LGLYPH_SET_ADJUSTMENT (lglyph, vec);
1614 }
1615 }
1616 return make_number (i);
1617 }
1618
1619 Lisp_Object
1620 ftfont_shape (lgstring)
1621 Lisp_Object lgstring;
1622 {
1623 struct font *font;
1624 struct ftfont_info *ftfont_info;
1625
1626 CHECK_FONT_GET_OBJECT (LGSTRING_FONT (lgstring), font);
1627 ftfont_info = (struct ftfont_info *) font;
1628 if (! ftfont_info->maybe_otf)
1629 return make_number (0);
1630 if (! ftfont_info->otf)
1631 {
1632 OTF *otf = OTF_open_ft_face (ftfont_info->ft_size->face);
1633
1634 if (! otf || OTF_get_table (otf, "head") < 0)
1635 {
1636 if (otf)
1637 OTF_close (otf);
1638 ftfont_info->maybe_otf = 0;
1639 return make_number (0);
1640 }
1641
1642 ftfont_info->otf = otf;
1643 }
1644
1645 return ftfont_shape_by_flt (lgstring, font, ftfont_info->ft_size->face,
1646 ftfont_info->otf);
1647 }
1648
1649 #endif /* HAVE_M17N_FLT */
1650 #endif /* HAVE_LIBOTF */
1651
1652 Lisp_Object
1653 ftfont_font_format (FcPattern *pattern)
1654 {
1655 FcChar8 *str;
1656
1657 #ifdef FC_FONTFORMAT
1658 if (FcPatternGetString (pattern, FC_FONTFORMAT, 0, &str) != FcResultMatch)
1659 return Qnil;
1660 if (strcmp ((char *) str, "TrueType") == 0)
1661 return intern ("truetype");
1662 if (strcmp ((char *) str, "Type 1") == 0)
1663 return intern ("type1");
1664 if (strcmp ((char *) str, "PCF") == 0)
1665 return intern ("pcf");
1666 if (strcmp ((char *) str, "BDF") == 0)
1667 return intern ("bdf");
1668 #else /* not FC_FONTFORMAT */
1669 if (FcPatternGetString (pattern, FC_FILE, 0, &str) != FcResultMatch)
1670 return Qnil;
1671 if (strcasestr ((char *) str, ".ttf") == 0)
1672 return intern ("truetype");
1673 if (strcasestr ((char *) str, "pfb") == 0)
1674 return intern ("type1");
1675 if (strcasestr ((char *) str, "pcf") == 0)
1676 return intern ("pcf");
1677 if (strcasestr ((char *) str, "bdf") == 0)
1678 return intern ("bdf");
1679 #endif /* not FC_FONTFORMAT */
1680 return intern ("unknown");
1681 }
1682
1683 \f
1684 void
1685 syms_of_ftfont ()
1686 {
1687 DEFSYM (Qfreetype, "freetype");
1688 DEFSYM (Qmonospace, "monospace");
1689 DEFSYM (Qsans_serif, "sans-serif");
1690 DEFSYM (Qserif, "serif");
1691 DEFSYM (Qmono, "mono");
1692 DEFSYM (Qsans, "sans");
1693 DEFSYM (Qsans__serif, "sans serif");
1694
1695 staticpro (&freetype_font_cache);
1696 freetype_font_cache = Fcons (Qt, Qnil);
1697
1698 staticpro (&ftfont_generic_family_list);
1699 ftfont_generic_family_list
1700 = Fcons (Fcons (Qmonospace, Qt),
1701 Fcons (Fcons (Qsans_serif, Qt),
1702 Fcons (Fcons (Qsans, Qt), Qnil)));
1703
1704 ftfont_driver.type = Qfreetype;
1705 register_font_driver (&ftfont_driver, NULL);
1706 }
1707
1708 /* arch-tag: 7cfa432c-33a6-4988-83d2-a82ed8604aca
1709 (do not change this comment) */
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