ftfont.c 40.9 KB
Newer Older
Kenichi Handa's avatar
Kenichi Handa committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
/* ftfont.c -- FreeType font driver.
   Copyright (C) 2006 Free Software Foundation, Inc.
   Copyright (C) 2006
     National Institute of Advanced Industrial Science and Technology (AIST)
     Registration Number H13PRO009

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */

#include <config.h>
#include <stdio.h>

#include <fontconfig/fontconfig.h>
#include <fontconfig/fcfreetype.h>

#include "lisp.h"
#include "dispextern.h"
#include "frame.h"
#include "blockinput.h"
#include "character.h"
#include "charset.h"
#include "coding.h"
#include "fontset.h"
#include "font.h"
39
#include "ftfont.h"
Kenichi Handa's avatar
Kenichi Handa committed
40

41
/* Symbolic type of this font-driver.  */
Kenichi Handa's avatar
Kenichi Handa committed
42 43
Lisp_Object Qfreetype;

44 45 46
/* Fontconfig's generic families and their aliases.  */
static Lisp_Object Qmonospace, Qsans_serif, Qserif, Qmono, Qsans, Qsans__serif;

47
/* Flag to tell if FcInit is areadly called or not.  */
Kenichi Handa's avatar
Kenichi Handa committed
48
static int fc_initialized;
49 50

/* Handle to a FreeType library instance.  */
Kenichi Handa's avatar
Kenichi Handa committed
51 52
static FT_Library ft_library;

53
/* Cache for FreeType fonts.  */
Kenichi Handa's avatar
Kenichi Handa committed
54 55
static Lisp_Object freetype_font_cache;

56 57
/* Fontconfig's charset used for finding fonts of registry
   "iso8859-1".  */
Kenichi Handa's avatar
Kenichi Handa committed
58 59 60 61 62 63 64 65 66
static FcCharSet *cs_iso8859_1;

/* The actual structure for FreeType font that can be casted to struct
   font.  */

struct ftfont_info
{
  struct font font;
  FT_Size ft_size;
67 68 69 70
#ifdef HAVE_LIBOTF
  int maybe_otf;	/* Flag to tell if this may be OTF or not.  */
  OTF *otf;
#endif	/* HAVE_LIBOTF */
Kenichi Handa's avatar
Kenichi Handa committed
71 72
};

73 74 75 76 77
static int ftfont_build_basic_charsets P_ ((void));
static Lisp_Object ftfont_pattern_entity P_ ((FcPattern *,
					      Lisp_Object, Lisp_Object));
static Lisp_Object ftfont_list_generic_family P_ ((Lisp_Object, Lisp_Object,
						   Lisp_Object));
78
Lisp_Object ftfont_font_format P_ ((FcPattern *));
79 80 81

#define SYMBOL_FcChar8(SYM) (FcChar8 *) SDATA (SYMBOL_NAME (SYM))

Kenichi Handa's avatar
Kenichi Handa committed
82 83 84 85 86 87 88 89 90 91 92
static int
ftfont_build_basic_charsets ()
{
  FcChar32 c;

  cs_iso8859_1 = FcCharSetCreate ();
  if (! cs_iso8859_1)
    return -1;
  for (c = ' '; c < 127; c++)
    if (! FcCharSetAddChar (cs_iso8859_1, c))
      return -1;
Kenichi Handa's avatar
Kenichi Handa committed
93 94
#if 0
  /* This part is currently disabled.  Should be fixed later.  */
Kenichi Handa's avatar
Kenichi Handa committed
95 96 97
  for (c = 192; c < 256; c++)
    if (! FcCharSetAddChar (cs_iso8859_1, c))
      return -1;
Kenichi Handa's avatar
Kenichi Handa committed
98
#endif
Kenichi Handa's avatar
Kenichi Handa committed
99 100 101
  return 0;
}

102 103
static Lisp_Object
ftfont_pattern_entity (p, frame, registry)
104
     FcPattern *p;
105
     Lisp_Object frame, registry;
106 107
{
  Lisp_Object entity;
108
  FcChar8 *file, *fontformat;
109 110 111 112 113 114 115
  FcCharSet *charset;
  char *str;
  int numeric;
  double dbl;

  if (FcPatternGetString (p, FC_FILE, 0, &file) != FcResultMatch)
    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;
122 123 124 125 126 127 128 129 130 131 132 133 134

  entity = Fmake_vector (make_number (FONT_ENTITY_MAX), null_string);

  ASET (entity, FONT_TYPE_INDEX, Qfreetype);
  ASET (entity, FONT_REGISTRY_INDEX, registry);
  ASET (entity, FONT_FRAME_INDEX, frame);
  ASET (entity, FONT_OBJLIST_INDEX, Qnil);

  if (FcPatternGetString (p, FC_FOUNDRY, 0, (FcChar8 **) &str) == FcResultMatch)
    ASET (entity, FONT_FOUNDRY_INDEX, intern_downcase (str, strlen (str)));
  if (FcPatternGetString (p, FC_FAMILY, 0, (FcChar8 **) &str) == FcResultMatch)
    ASET (entity, FONT_FAMILY_INDEX, intern_downcase (str, strlen (str)));
  if (FcPatternGetInteger (p, FC_WEIGHT, 0, &numeric) == FcResultMatch)
135 136 137 138 139
    {
      if (numeric == FC_WEIGHT_REGULAR)
	numeric = 100;
      ASET (entity, FONT_WEIGHT_INDEX, make_number (numeric));
    }
140 141 142 143 144 145 146 147 148 149
  if (FcPatternGetInteger (p, FC_SLANT, 0, &numeric) == FcResultMatch)
    ASET (entity, FONT_SLANT_INDEX, make_number (numeric + 100));
  if (FcPatternGetInteger (p, FC_WIDTH, 0, &numeric) == FcResultMatch)
    ASET (entity, FONT_WIDTH_INDEX, make_number (numeric));
  if (FcPatternGetDouble (p, FC_PIXEL_SIZE, 0, &dbl) == FcResultMatch)
    ASET (entity, FONT_SIZE_INDEX, make_number (dbl));
  else
    ASET (entity, FONT_SIZE_INDEX, make_number (0));

  if (FcPatternGetInteger (p, FC_SPACING, 0, &numeric) != FcResultMatch)
150
    numeric = -1;
151 152 153 154 155 156 157 158 159
  file = FcStrCopy (file);
  if (! file)
    return Qnil;

  p = FcPatternCreate ();
  if (! p)
    return Qnil;

  if (FcPatternAddString (p, FC_FILE, file) == FcFalse
160 161
      || (charset
	  && FcPatternAddCharSet (p, FC_CHARSET, charset) == FcFalse)
162
#ifdef FC_FONTFORMAT
163 164
      || (fontformat
	  && FcPatternAddString (p, FC_FONTFORMAT, fontformat) == FcFalse)
165
#endif	/* FC_FONTFORMAT */
166 167
      || (numeric >= 0
	  && FcPatternAddInteger (p, FC_SPACING, numeric) == FcFalse))
168 169 170 171 172 173 174 175
    {
      FcPatternDestroy (p);
      return Qnil;
    }
  ASET (entity, FONT_EXTRA_INDEX, make_save_value (p, 0));
  return entity;
}

176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203
static Lisp_Object ftfont_generic_family_list;

static Lisp_Object
ftfont_list_generic_family (spec, frame, registry)
     Lisp_Object spec, frame, registry;
{
  Lisp_Object family = AREF (spec, FONT_FAMILY_INDEX);
  Lisp_Object slot, list, val;

  if (EQ (family, Qmono))
    family = Qmonospace;
  else if (EQ (family, Qsans) || EQ (family, Qsans__serif))
    family = Qsans_serif;
  slot = assq_no_quit (family, ftfont_generic_family_list);
  if (! CONSP (slot))
    return null_vector;
  list = XCDR (slot);
  if (EQ (list, Qt))
    {
      /* Not yet listed.  */
      FcObjectSet *objset = NULL;
      FcPattern *pattern = NULL, *pat = NULL;
      FcFontSet *fontset = NULL;
      FcChar8 *fam;
      int i, j;

      objset = FcObjectSetBuild (FC_FOUNDRY, FC_FAMILY, FC_WEIGHT, FC_SLANT,
				 FC_WIDTH, FC_PIXEL_SIZE, FC_SPACING,
204 205 206 207 208
				 FC_CHARSET, FC_FILE,
#ifdef FC_FONTFORMAT
				 FC_FONTFORMAT,
#endif	/* FC_FONTFORMAT */
				 NULL);
209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263
      if (! objset)
	goto err;
      pattern = FcPatternBuild (NULL, FC_FAMILY, FcTypeString,
				SYMBOL_FcChar8 (family), (char *) 0);
      if (! pattern)
	goto err;
      pat = FcPatternCreate ();
      if (! pat)
	goto err;
      FcConfigSubstitute (NULL, pattern, FcMatchPattern);
      for (i = 0, val = Qnil;
	   FcPatternGetString (pattern, FC_FAMILY, i, &fam) == FcResultMatch;
	   i++)
	{
	  if (strcmp ((char *) fam, (char *) SYMBOL_FcChar8 (family)) == 0)
	    continue;
	  if (! FcPatternAddString (pat, FC_FAMILY, fam))
	    goto err;
	  fontset = FcFontList (NULL, pat, objset);
	  if (! fontset)
	    goto err;
	  /* Here we build the list in reverse order so that the last
	     loop in this function build a list in the correct
	     order.  */
	  for (j = 0; j < fontset->nfont; j++)
	    {
	      Lisp_Object entity;

	      entity = ftfont_pattern_entity (fontset->fonts[j],
					      frame, registry);
	      if (! NILP (entity))
		val = Fcons (entity, val);
	    }
	  FcFontSetDestroy (fontset);
	  fontset = NULL;
	  FcPatternDel (pat, FC_FAMILY);
	}
      list = val;
      XSETCDR (slot, list);
    err:
      if (pat) FcPatternDestroy (pat);
      if (pattern) FcPatternDestroy (pattern);
      if (fontset) FcFontSetDestroy (fontset);
      if (objset) FcObjectSetDestroy (objset);
      if (EQ (list, Qt))
	return Qnil;
    }
  ASET (spec, FONT_FAMILY_INDEX, Qnil);
  for (val = Qnil; CONSP (list); list = XCDR (list))
    if (font_match_p (spec, XCAR (list)))
      val = Fcons (XCAR (list), val);
  ASET (spec, FONT_FAMILY_INDEX, family);
  return Fvconcat (1, &val);
}

264

Kenichi Handa's avatar
Kenichi Handa committed
265 266
static Lisp_Object ftfont_get_cache P_ ((Lisp_Object));
static Lisp_Object ftfont_list P_ ((Lisp_Object, Lisp_Object));
267
static Lisp_Object ftfont_match P_ ((Lisp_Object, Lisp_Object));
Kenichi Handa's avatar
Kenichi Handa committed
268 269 270 271 272 273 274 275 276 277 278 279
static Lisp_Object ftfont_list_family P_ ((Lisp_Object));
static void ftfont_free_entity P_ ((Lisp_Object));
static struct font *ftfont_open P_ ((FRAME_PTR, Lisp_Object, int));
static void ftfont_close P_ ((FRAME_PTR, struct font *));
static int ftfont_has_char P_ ((Lisp_Object, int));
static unsigned ftfont_encode_char P_ ((struct font *, int));
static int ftfont_text_extents P_ ((struct font *, unsigned *, int,
				    struct font_metrics *));
static int ftfont_get_bitmap P_ ((struct font *, unsigned,
				  struct font_bitmap *, int));
static int ftfont_anchor_point P_ ((struct font *, unsigned, int,
				    int *, int *));
280
static Lisp_Object ftfont_shape P_ ((Lisp_Object));
Kenichi Handa's avatar
Kenichi Handa committed
281 282 283

struct font_driver ftfont_driver =
  {
284
    0,				/* Qfreetype */
Kenichi Handa's avatar
Kenichi Handa committed
285 286
    ftfont_get_cache,
    ftfont_list,
287
    ftfont_match,
Kenichi Handa's avatar
Kenichi Handa committed
288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306
    ftfont_list_family,
    ftfont_free_entity,
    ftfont_open,
    ftfont_close,
    /* We can't draw a text without device dependent functions.  */
    NULL,
    NULL,
    ftfont_has_char,
    ftfont_encode_char,
    ftfont_text_extents,
    /* We can't draw a text without device dependent functions.  */
    NULL,
    ftfont_get_bitmap,
    NULL,
    NULL,
    NULL,
    ftfont_anchor_point,
    NULL,
    NULL,
307 308 309 310 311
    NULL,
    NULL,
#ifdef HAVE_M17N_FLT
    ftfont_shape
#else  /* not HAVE_M17N_FLT */
Kenichi Handa's avatar
Kenichi Handa committed
312
    NULL
313
#endif	/* not HAVE_M17N_FLT */
Kenichi Handa's avatar
Kenichi Handa committed
314 315 316 317 318 319 320 321 322 323 324 325 326 327 328
  };

extern Lisp_Object QCname;

static Lisp_Object
ftfont_get_cache (frame)
     Lisp_Object frame;
{
  return freetype_font_cache;
}

static Lisp_Object
ftfont_list (frame, spec)
     Lisp_Object frame, spec;
{
329
  Lisp_Object val, tmp, extra;
Kenichi Handa's avatar
Kenichi Handa committed
330 331 332 333 334 335
  int i;
  FcPattern *pattern = NULL;
  FcCharSet *charset = NULL;
  FcLangSet *langset = NULL;
  FcFontSet *fontset = NULL;
  FcObjectSet *objset = NULL;
336
  Lisp_Object script;
337
  Lisp_Object registry = Qunicode_bmp;
338
  int weight = 0;
339 340 341
  double dpi = -1;
  int spacing = -1;
  int scalable = -1;
342
  char otf_script[15];		/* For "otlayout\:XXXX" */
Kenichi Handa's avatar
Kenichi Handa committed
343 344 345 346 347 348 349 350 351
  
  val = null_vector;

  if (! fc_initialized)
    {
      FcInit ();
      fc_initialized = 1;
    }

352 353
  if (! NILP (AREF (spec, FONT_ADSTYLE_INDEX))
      && ! EQ (AREF (spec, FONT_ADSTYLE_INDEX), null_string))
Kenichi Handa's avatar
Kenichi Handa committed
354
    return val;
355 356 357 358 359
  if (! NILP (AREF (spec, FONT_SLANT_INDEX))
      && XINT (AREF (spec, FONT_SLANT_INDEX)) < 100)
    /* Fontconfig doesn't support reverse-italic/obligue.  */
    return val;

Kenichi Handa's avatar
Kenichi Handa committed
360 361 362 363 364 365 366
  if (! NILP (AREF (spec, FONT_REGISTRY_INDEX)))
    {
      registry = AREF (spec, FONT_REGISTRY_INDEX);
      if (EQ (registry, Qiso8859_1))
	{
	  if (! cs_iso8859_1
	      && ftfont_build_basic_charsets () < 0)
367
	    return Qnil;
Kenichi Handa's avatar
Kenichi Handa committed
368 369
	  charset = cs_iso8859_1;
	}
370 371 372
      else if (! EQ (registry, Qiso10646_1)
	       && ! EQ (registry, Qunicode_bmp)
	       && ! EQ (registry, Qunicode_sip))
373
	return val;
Kenichi Handa's avatar
Kenichi Handa committed
374 375
    }

376
  otf_script[0] = '\0';
377 378 379
  script = Qnil;
  for (extra = AREF (spec, FONT_EXTRA_INDEX);
       CONSP (extra); extra = XCDR (extra))
Kenichi Handa's avatar
Kenichi Handa committed
380
    {
381 382 383 384 385
      Lisp_Object key, val;

      tmp = XCAR (extra);
      key = XCAR (tmp), val = XCDR (tmp);
      if (EQ (key, QCotf))
386
	{
387 388 389 390 391 392 393 394 395 396 397 398 399
	  tmp = XCAR (val);
	  if (NILP (tmp))
	    strcpy (otf_script, "otlayout:DFLT");
	  else
	    {
	      val = assq_no_quit (tmp, Votf_script_alist);
	      if (CONSP (val) && SYMBOLP (XCDR (val)))
		{
		  sprintf (otf_script, "otlayout:%s",
			   (char *) SDATA (SYMBOL_NAME (tmp)));
		  script = XCDR (val);
		}
	    }
400
	}
401
      else if (EQ (key, QClanguage))
Kenichi Handa's avatar
Kenichi Handa committed
402 403 404 405
	{
	  langset = FcLangSetCreate ();
	  if (! langset)
	    goto err;
406
	  if (SYMBOLP (val))
Kenichi Handa's avatar
Kenichi Handa committed
407
	    {
408
	      if (! FcLangSetAdd (langset, SYMBOL_FcChar8 (val)))
Kenichi Handa's avatar
Kenichi Handa committed
409 410 411
		goto err;
	    }
	  else
412 413 414 415
	    for (; CONSP (val); val = XCDR (val))
	      if (SYMBOLP (XCAR (val))
		  && ! FcLangSetAdd (langset, SYMBOL_FcChar8 (XCAR (val))))
		goto err;
Kenichi Handa's avatar
Kenichi Handa committed
416
	}
417 418 419 420 421 422 423 424 425
      else if (EQ (key, QCscript))
	script = val;
      else if (EQ (key, QCdpi))
	dpi = XINT (val);
      else if (EQ (key, QCspacing))
	spacing = XINT (val);
      else if (EQ (key, QCscalable))
	scalable = ! NILP (val);
    }
Kenichi Handa's avatar
Kenichi Handa committed
426

427 428 429 430 431 432 433 434 435 436 437 438 439
  if (! NILP (script) && ! charset)
    {
      Lisp_Object chars = assq_no_quit (script, Vscript_representative_chars);

      if (CONSP (chars))
	{
	  charset = FcCharSetCreate ();
	  if (! charset)
	    goto err;
	  for (chars = XCDR (chars); CONSP (chars); chars = XCDR (chars))
	    if (CHARACTERP (XCAR (chars))
		&& ! FcCharSetAddChar (charset, XUINT (XCAR (chars))))
	      goto err;
Kenichi Handa's avatar
Kenichi Handa committed
440 441 442
	}
    }

443
  pattern = FcPatternCreate ();
444 445 446 447 448 449 450 451 452 453
  if (! pattern)
    goto err;
  tmp = AREF (spec, FONT_FOUNDRY_INDEX);
  if (SYMBOLP (tmp) && ! NILP (tmp)
      && ! FcPatternAddString (pattern, FC_FOUNDRY, SYMBOL_FcChar8 (tmp)))
    goto err;
  tmp = AREF (spec, FONT_FAMILY_INDEX);
  if (SYMBOLP (tmp) && ! NILP (tmp)
      && ! FcPatternAddString (pattern, FC_FAMILY, SYMBOL_FcChar8 (tmp)))
    goto err;
454 455 456
  /* Emacs conventionally doesn't distinguish normal, regular, and
     medium weight, but fontconfig does.  So, we can't restrict font
     listing by weight.  We check it after getting a list.  */
457
  tmp = AREF (spec, FONT_WEIGHT_INDEX);
458 459
  if (INTEGERP (tmp))
    weight = XINT (tmp);
460 461 462 463 464 465 466 467
  tmp = AREF (spec, FONT_SLANT_INDEX);
  if (INTEGERP (tmp)
      && ! FcPatternAddInteger (pattern, FC_SLANT, XINT (tmp) - 100))
    goto err;
  tmp = AREF (spec, FONT_WIDTH_INDEX);
  if (INTEGERP (tmp)
      && ! FcPatternAddInteger (pattern, FC_WIDTH, XINT (tmp)))
    goto err;
Kenichi Handa's avatar
Kenichi Handa committed
468 469 470 471 472 473 474

  if (charset
      && ! FcPatternAddCharSet (pattern, FC_CHARSET, charset))
    goto err;
  if (langset
      && ! FcPatternAddLangSet (pattern, FC_LANG, langset))
    goto err;
475 476 477 478 479 480 481
  if (dpi >= 0
      && ! FcPatternAddDouble (pattern, FC_DPI, dpi))
    goto err;
  if (spacing >= 0
      && ! FcPatternAddInteger (pattern, FC_SPACING, spacing))
    goto err;
  if (scalable >= 0
Kenichi Handa's avatar
Kenichi Handa committed
482
      && ! FcPatternAddBool (pattern, FC_SCALABLE, scalable ? FcTrue : FcFalse))
483
    goto err;
Kenichi Handa's avatar
Kenichi Handa committed
484

485 486
  objset = FcObjectSetBuild (FC_FOUNDRY, FC_FAMILY, FC_WEIGHT, FC_SLANT,
			     FC_WIDTH, FC_PIXEL_SIZE, FC_SPACING,
487 488 489 490 491
			     FC_CHARSET, FC_FILE,
#ifdef FC_FONTFORMAT
			     FC_FONTFORMAT,
#endif	/* FC_FONTFORMAT */
			     NULL);
492 493
  if (! objset)
    goto err;
494 495 496 497 498 499 500 501
  if (otf_script[0])
    {
#ifndef FC_CAPABILITY
      goto finish;
#else  /* not FC_CAPABILITY */
      if (! FcObjectSetAdd (objset, FC_CAPABILITY))
	goto err;
#endif	/* not FC_CAPABILITY */
502
    }
503

504 505 506
  fontset = FcFontList (NULL, pattern, objset);
  if (! fontset)
    goto err;
Kenichi Handa's avatar
Kenichi Handa committed
507

508 509
  if (fontset->nfont > 0)
    {
510 511 512 513 514 515 516
      double pixel_size;

      if (NILP (AREF (spec, FONT_SIZE_INDEX)))
	pixel_size = 0;
      else
	pixel_size = XINT (AREF (spec, FONT_SIZE_INDEX));

517
      for (i = 0, val = Qnil; i < fontset->nfont; i++)
Kenichi Handa's avatar
Kenichi Handa committed
518
	{
519 520 521 522 523 524 525 526
	  Lisp_Object entity;

	  if (pixel_size > 0)
	    {
	      double this;

	      if (FcPatternGetDouble (fontset->fonts[i], FC_PIXEL_SIZE, 0,
				      &this) == FcResultMatch
527 528 529 530 531 532 533 534 535 536 537 538 539 540
		  && ((this < pixel_size - FONT_PIXEL_SIZE_QUANTUM)
		      || (this > pixel_size + FONT_PIXEL_SIZE_QUANTUM)))
		continue;
	    }
	  if (weight > 0)
	    {
	      int this;

	      if (FcPatternGetInteger (fontset->fonts[i], FC_WEIGHT, 0,
				       &this) != FcResultMatch
		  || (this != weight
		      && (weight != 100
			  || this < FC_WEIGHT_REGULAR
			  || this > FC_WEIGHT_MEDIUM)))
541 542
		continue;
	    }
543
#ifdef FC_CAPABILITY
544 545 546 547 548 549 550 551 552
	  if (otf_script[0])
	    {
	      FcChar8 *this;

	      if (FcPatternGetString (fontset->fonts[i], FC_CAPABILITY, 0,
				      &this) != FcResultMatch
		  || ! strstr ((char *) this, otf_script))
		continue;
	    }
553
#endif	/* FC_CAPABILITY */
554
	  entity = ftfont_pattern_entity (fontset->fonts[i], frame, registry);
555 556
	  if (! NILP (entity))
	    val = Fcons (entity, val);
Kenichi Handa's avatar
Kenichi Handa committed
557
	}
558
      val = Fvconcat (1, &val);
Kenichi Handa's avatar
Kenichi Handa committed
559
    }
560 561
  else if (! NILP (AREF (spec, FONT_FAMILY_INDEX)))
    val = ftfont_list_generic_family (spec, frame, registry);
Kenichi Handa's avatar
Kenichi Handa committed
562 563 564 565
  goto finish;

 err:
  /* We come here because of unexpected error in fontconfig API call
566
     (usually insufficient memory).  */
Kenichi Handa's avatar
Kenichi Handa committed
567 568 569 570 571 572 573 574 575 576 577 578
  val = Qnil;

 finish:
  if (charset && charset != cs_iso8859_1) FcCharSetDestroy (charset);
  if (objset) FcObjectSetDestroy (objset);
  if (fontset) FcFontSetDestroy (fontset);
  if (langset) FcLangSetDestroy (langset);
  if (pattern) FcPatternDestroy (pattern);

  return val;
}

579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617
static Lisp_Object
ftfont_match (frame, spec)
     Lisp_Object frame, spec;
{
  Lisp_Object extra, val, entity;
  FcPattern *pattern = NULL, *match = NULL;
  FcResult result;

  if (! fc_initialized)
    {
      FcInit ();
      fc_initialized = 1;
    }

  extra = AREF (spec, FONT_EXTRA_INDEX);
  val = assq_no_quit (QCname, extra);
  if (! CONSP (val) || ! STRINGP (XCDR (val)))
    return Qnil;

  entity = Qnil;
  pattern = FcNameParse (SDATA (XCDR (val)));
  if (pattern)
    {
      if (FcConfigSubstitute (NULL, pattern, FcMatchPattern) == FcTrue)
	{
	  FcDefaultSubstitute (pattern);
	  match = FcFontMatch (NULL, pattern, &result);
	  if (match)
	    {
	      entity = ftfont_pattern_entity (match, frame, Qunicode_bmp);
	      FcPatternDestroy (match);
	    }
	}
      FcPatternDestroy (pattern);
    }

  return entity;
}

Kenichi Handa's avatar
Kenichi Handa committed
618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636
static Lisp_Object
ftfont_list_family (frame)
     Lisp_Object frame;
{
  Lisp_Object list;
  FcPattern *pattern = NULL;
  FcFontSet *fontset = NULL;
  FcObjectSet *objset = NULL;
  int i;

  if (! fc_initialized)
    {
      FcInit ();
      fc_initialized = 1;
    }

  pattern = FcPatternCreate ();
  if (! pattern)
    goto finish;
637
  objset = FcObjectSetBuild (FC_FAMILY, NULL);
Kenichi Handa's avatar
Kenichi Handa committed
638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688
  if (! objset)
    goto finish;
  fontset = FcFontList (NULL, pattern, objset);
  if (! fontset)
    goto finish;

  list = Qnil;
  for (i = 0; i < fontset->nfont; i++)
    {
      FcPattern *pat = fontset->fonts[i];
      FcChar8 *str;

      if (FcPatternGetString (pat, FC_FAMILY, 0, &str) == FcResultMatch)
	list = Fcons (intern_downcase ((char *) str, strlen ((char *) str)),
		      list);
    }

 finish:
  if (objset) FcObjectSetDestroy (objset);
  if (fontset) FcFontSetDestroy (fontset);
  if (pattern) FcPatternDestroy (pattern);

  return list;
}


static void 
ftfont_free_entity (entity)
     Lisp_Object entity;
{
  Lisp_Object val = AREF (entity, FONT_EXTRA_INDEX);
  FcPattern *pattern = XSAVE_VALUE (val)->pointer;

  FcPatternDestroy (pattern);
}

static struct font *
ftfont_open (f, entity, pixel_size)
     FRAME_PTR f;
     Lisp_Object entity;
     int pixel_size;
{
  struct ftfont_info *ftfont_info;
  struct font *font;
  FT_Face ft_face;
  FT_Size ft_size;
  FT_UInt size;
  Lisp_Object val;
  FcPattern *pattern;
  FcChar8 *file;
  int spacing;
689 690
  char *name;
  int len;
Kenichi Handa's avatar
Kenichi Handa committed
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737

  val = AREF (entity, FONT_EXTRA_INDEX);
  if (XTYPE (val) != Lisp_Misc
      || XMISCTYPE (val) != Lisp_Misc_Save_Value)
    return NULL;
  pattern = XSAVE_VALUE (val)->pointer;
  if (XSAVE_VALUE (val)->integer == 0)
    {
      /* We have not yet created FT_Face for this font.  */
      if (! ft_library
	  && FT_Init_FreeType (&ft_library) != 0)
	return NULL;
      if (FcPatternGetString (pattern, FC_FILE, 0, &file) != FcResultMatch)
	return NULL;
      if (FT_New_Face (ft_library, (char *) file, 0, &ft_face) != 0)
	return NULL;
      FcPatternAddFTFace (pattern, FC_FT_FACE, ft_face);
      ft_size = ft_face->size;
    }
  else
    {
      if (FcPatternGetFTFace (pattern, FC_FT_FACE, 0, &ft_face)
	  != FcResultMatch)
	return NULL;
      if (FT_New_Size (ft_face, &ft_size) != 0)
	return NULL;
      if (FT_Activate_Size (ft_size) != 0)
	{
	  FT_Done_Size (ft_size);
	  return NULL;
	}
    } 

  size = XINT (AREF (entity, FONT_SIZE_INDEX));
  if (size == 0)
    size = pixel_size;
  if (FT_Set_Pixel_Sizes (ft_face, size, size) != 0)
    {
      if (XSAVE_VALUE (val)->integer == 0)
	FT_Done_Face (ft_face);
      return NULL;
    }

  ftfont_info = malloc (sizeof (struct ftfont_info));
  if (! ftfont_info)
    return NULL;
  ftfont_info->ft_size = ft_size;
738
#ifdef HAVE_LIBOTF
739 740
  ftfont_info->maybe_otf = ft_face->face_flags & FT_FACE_FLAG_SFNT;
  ftfont_info->otf = NULL;
741
#endif	/* HAVE_LIBOTF */
Kenichi Handa's avatar
Kenichi Handa committed
742 743

  font = (struct font *) ftfont_info;
744
  font->format = ftfont_font_format (pattern);
Kenichi Handa's avatar
Kenichi Handa committed
745 746 747
  font->entity = entity;
  font->pixel_size = size;
  font->driver = &ftfont_driver;
748 749 750 751 752 753 754 755 756 757 758
  len = 96;
  name = malloc (len);
  while (name && font_unparse_fcname (entity, pixel_size, name, len) < 0)
    {
      char *new = realloc (name, len += 32);

      if (! new)
	free (name);
      name = new;
    }
  font->font.full_name = font->font.name = name;
Kenichi Handa's avatar
Kenichi Handa committed
759 760
  font->file_name = (char *) file;
  font->font.size = ft_face->size->metrics.max_advance >> 6;
761 762
  if (font->font.size <= 0)
    font->font.size = size;
763
  font->font.charset = font->encoding_charset = font->repertory_charset = -1;
Kenichi Handa's avatar
Kenichi Handa committed
764 765
  font->ascent = ft_face->size->metrics.ascender >> 6;
  font->descent = - ft_face->size->metrics.descender >> 6;
766 767 768 769
  font->font.height = font->ascent + font->descent;
  if (FcPatternGetInteger (pattern, FC_SPACING, 0, &spacing) != FcResultMatch)
    spacing = FC_PROPORTIONAL;
  if (spacing != FC_PROPORTIONAL)
Kenichi Handa's avatar
Kenichi Handa committed
770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
    font->font.average_width = font->font.space_width = font->font.size;
  else
    {
      int i;

      for (i = 32; i < 127; i++)
	{
	  if (FT_Load_Char (ft_face, i, FT_LOAD_DEFAULT) != 0)
	    break;
	  if (i == 32)
	    font->font.space_width = ft_face->glyph->metrics.horiAdvance >> 6;
	  font->font.average_width += ft_face->glyph->metrics.horiAdvance >> 6;
	}
      if (i == 127)
	{
	  /* The font contains all ASCII printable characters.  */
	  font->font.average_width /= 95;
	}
      else
	{
	  if (i == 32)
	    font->font.space_width = font->font.size;
	  font->font.average_width = font->font.size;
	}
    }

796 797 798 799
  /* Unfortunately FreeType doesn't provide a way to get minimum char
     width.  So, we use space_width instead.  */
  font->min_width = font->font.space_width;

Kenichi Handa's avatar
Kenichi Handa committed
800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820
  font->font.baseline_offset = 0;
  font->font.relative_compose = 0;
  font->font.default_ascent = 0;
  font->font.vertical_centering = 0;

  (XSAVE_VALUE (val)->integer)++;

  return font;
}

static void
ftfont_close (f, font)
     FRAME_PTR f;
     struct font *font;
{
  struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
  Lisp_Object entity = font->entity;
  Lisp_Object val = AREF (entity, FONT_EXTRA_INDEX);

  (XSAVE_VALUE (val)->integer)--;
  if (XSAVE_VALUE (val)->integer == 0)
821 822 823 824 825 826 827
    {
      FT_Done_Face (ftfont_info->ft_size->face);
#ifdef HAVE_LIBOTF
      if (ftfont_info->otf)
	OTF_close (ftfont_info->otf);
#endif
    }
Kenichi Handa's avatar
Kenichi Handa committed
828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844
  else
    FT_Done_Size (ftfont_info->ft_size);

  free (font);
}

static int 
ftfont_has_char (entity, c)
     Lisp_Object entity;
     int c;
{
  Lisp_Object val;
  FcPattern *pattern;
  FcCharSet *charset;

  val = AREF (entity, FONT_EXTRA_INDEX);
  pattern = XSAVE_VALUE (val)->pointer;
845 846
  if (FcPatternGetCharSet (pattern, FC_CHARSET, 0, &charset) != FcResultMatch)
    return -1;
Kenichi Handa's avatar
Kenichi Handa committed
847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937
  return (FcCharSetHasChar (charset, (FcChar32) c) == FcTrue);
}

static unsigned
ftfont_encode_char (font, c)
     struct font *font;
     int c;
{
  struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
  FT_Face ft_face = ftfont_info->ft_size->face;
  FT_ULong charcode = c;
  FT_UInt code = FT_Get_Char_Index (ft_face, charcode);

  return (code > 0 ? code : 0xFFFFFFFF);
}

static int
ftfont_text_extents (font, code, nglyphs, metrics)
     struct font *font;
     unsigned *code;
     int nglyphs;
     struct font_metrics *metrics;
{
  struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
  FT_Face ft_face = ftfont_info->ft_size->face;
  int width = 0;
  int i;

  if (ftfont_info->ft_size != ft_face->size)
    FT_Activate_Size (ftfont_info->ft_size);
  if (metrics)
    bzero (metrics, sizeof (struct font_metrics));
  for (i = 0; i < nglyphs; i++)
    {
      if (FT_Load_Glyph (ft_face, code[i], FT_LOAD_DEFAULT) == 0)
	{
	  FT_Glyph_Metrics *m = &ft_face->glyph->metrics;

	  if (metrics)
	    {
	      if (metrics->lbearing > width + (m->horiBearingX >> 6))
		metrics->lbearing = width + (m->horiBearingX >> 6);
	      if (metrics->rbearing
		  < width + ((m->horiBearingX + m->width) >> 6))
		metrics->rbearing
		  = width + ((m->horiBearingX + m->width) >> 6);
	      if (metrics->ascent < (m->horiBearingY >> 6))
		metrics->ascent = m->horiBearingY >> 6;
	      if (metrics->descent > ((m->horiBearingY + m->height) >> 6))
		metrics->descent = (m->horiBearingY + m->height) >> 6;
	    }
	  width += m->horiAdvance >> 6;
	}
      else
	{
	  width += font->font.space_width;
	}
    }
  if (metrics)
    metrics->width = width;

  return width;
}

static int
ftfont_get_bitmap (font, code, bitmap, bits_per_pixel)
     struct font *font;
     unsigned code;
     struct font_bitmap *bitmap;
     int bits_per_pixel;
{
  struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
  FT_Face ft_face = ftfont_info->ft_size->face;
  FT_Int32 load_flags = FT_LOAD_RENDER;

  if (ftfont_info->ft_size != ft_face->size)
    FT_Activate_Size (ftfont_info->ft_size);
  if (bits_per_pixel == 1)
    {
#ifdef FT_LOAD_TARGET_MONO
      load_flags |= FT_LOAD_TARGET_MONO;
#else
      load_flags |= FT_LOAD_MONOCHROME;
#endif
    }
  else if (bits_per_pixel != 8)
    /* We don't support such a rendering.  */
    return -1;

  if (FT_Load_Glyph (ft_face, code, load_flags) != 0)
    return -1;
938 939 940 941 942 943 944 945 946
  bitmap->bits_per_pixel
    = (ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO ? 1
       : ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_GRAY ? 8
       : ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_LCD ? 8
       : ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_LCD_V ? 8
       : -1);
  if (bitmap->bits_per_pixel < 0)
    /* We don't suport that kind of pixel mode.  */
    return -1;
Kenichi Handa's avatar
Kenichi Handa committed
947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981
  bitmap->rows = ft_face->glyph->bitmap.rows;
  bitmap->width = ft_face->glyph->bitmap.width;
  bitmap->pitch = ft_face->glyph->bitmap.pitch;
  bitmap->buffer = ft_face->glyph->bitmap.buffer;
  bitmap->left = ft_face->glyph->bitmap_left;
  bitmap->top = ft_face->glyph->bitmap_top;
  bitmap->advance = ft_face->glyph->metrics.horiAdvance >> 6;
  bitmap->extra = NULL;

  return 0;
}

static int
ftfont_anchor_point (font, code, index, x, y)
     struct font *font;
     unsigned code;
     int index;
     int *x, *y;
{
  struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
  FT_Face ft_face = ftfont_info->ft_size->face;

  if (ftfont_info->ft_size != ft_face->size)
    FT_Activate_Size (ftfont_info->ft_size);
  if (FT_Load_Glyph (ft_face, code, FT_LOAD_DEFAULT) != 0)
    return -1;
  if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
    return -1;
  if (index >= ft_face->glyph->outline.n_points)
    return -1;
  *x = ft_face->glyph->outline.points[index].x;
  *y = ft_face->glyph->outline.points[index].y;
  return 0;
}

982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499
#ifdef HAVE_LIBOTF
#ifdef HAVE_M17N_FLT

struct MFLTFontFT
{
  MFLTFont flt_font;
  struct font *font;
  FT_Face ft_face;
  OTF *otf;
};

static int
ftfont_get_glyph_id (font, gstring, from, to)
     MFLTFont *font;
     MFLTGlyphString *gstring;
     int from, to;
{
  struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
  FT_Face ft_face = flt_font_ft->ft_face;
  MFLTGlyph *g;

  for (g = gstring->glyphs + from; from < to; g++, from++)
    if (! g->encoded)
      {
	FT_UInt code = FT_Get_Char_Index (ft_face, g->code);

	g->code = code > 0 ? code : FONT_INVALID_CODE;
	g->encoded = 1;
      }
  return 0;
}

static int
ftfont_get_metrics (font, gstring, from, to)
     MFLTFont *font;
     MFLTGlyphString *gstring;
     int from, to;
{
  struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
  FT_Face ft_face = flt_font_ft->ft_face;
  MFLTGlyph *g;

  for (g = gstring->glyphs + from; from < to; g++, from++)
    if (! g->measured)
      {
	if (g->code != FONT_INVALID_CODE)
	  {
	    FT_Glyph_Metrics *m;

	    if (FT_Load_Glyph (ft_face, g->code, FT_LOAD_DEFAULT) != 0)
	      abort ();
	    m = &ft_face->glyph->metrics;

	    g->lbearing = m->horiBearingX;
	    g->rbearing = m->horiBearingX + m->width;
	    g->ascent = m->horiBearingY;
	    g->descent = m->height - m->horiBearingY;
	    g->xadv = m->horiAdvance;
	  }
	else
	  {
	    g->lbearing = 0;
	    g->rbearing = g->xadv = flt_font_ft->font->font.space_width << 6;
	    g->ascent = flt_font_ft->font->ascent << 6;
	    g->descent = flt_font_ft->font->descent << 6;
	  }
	g->yadv = 0;
	g->measured = 1;
      }
  return 0;
}

static int 
ftfont_check_otf (MFLTFont *font, MFLTOtfSpec *spec)
{
  struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
  OTF *otf = flt_font_ft->otf;
  OTF_Tag *tags;
  int i, n, negative;

  for (i = 0; i < 2; i++)
    {
      if (! spec->features[i])
	continue;
      for (n = 0; spec->features[i][n]; n++);
      tags = alloca (sizeof (OTF_Tag) * n);
      for (n = 0, negative = 0; spec->features[i][n]; n++)
	{
	  if (spec->features[i][n] == 0xFFFFFFFF)
	    negative = 1;
	  else if (negative)
	    tags[n - 1] = spec->features[i][n] | 0x80000000;
	  else
	    tags[n] = spec->features[i][n];
	}
      if (n - negative > 0
	  && OTF_check_features (otf, i == 0, spec->script, spec->langsys,
				 tags, n - negative) != 1)
	return 0;
    }
  return 1;
}

#define DEVICE_DELTA(table, size)				\
  (((size) >= (table).StartSize && (size) <= (table).EndSize)	\
   ? (table).DeltaValue[(size) - (table).StartSize] << 6	\
   : 0)

static void
adjust_anchor (FT_Face ft_face, OTF_Anchor *anchor,
	       unsigned code, int x_ppem, int y_ppem, int *x, int *y)
{
  if (anchor->AnchorFormat == 2)
    {
      FT_Outline *outline;
      int ap = anchor->f.f1.AnchorPoint;

      FT_Load_Glyph (ft_face, (FT_UInt) code, FT_LOAD_MONOCHROME);
      outline = &ft_face->glyph->outline;
      if (ap < outline->n_points)
	{
	  *x = outline->points[ap].x << 6;
	  *y = outline->points[ap].y << 6;
	}
    }
  else if (anchor->AnchorFormat == 3)
    {
      if (anchor->f.f2.XDeviceTable.offset)
	*x += DEVICE_DELTA (anchor->f.f2.XDeviceTable, x_ppem);
      if (anchor->f.f2.YDeviceTable.offset)
	*y += DEVICE_DELTA (anchor->f.f2.YDeviceTable, y_ppem);
    }
}

static OTF_GlyphString otf_gstring;

static int 
ftfont_drive_otf (font, spec, in, from, to, out, adjustment)
     MFLTFont *font;
     MFLTOtfSpec *spec;
     MFLTGlyphString *in;
     int from, to;
     MFLTGlyphString *out;
     MFLTGlyphAdjustment *adjustment;
{
  struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
  FT_Face ft_face = flt_font_ft->ft_face;
  OTF *otf = flt_font_ft->otf;
  int len = to - from;
  int i, j, gidx;
  OTF_Glyph *otfg;
  char script[5], *langsys = NULL;
  char *gsub_features = NULL, *gpos_features = NULL;

  if (len == 0)
    return from;
  OTF_tag_name (spec->script, script);
  if (spec->langsys)
    {
      langsys = alloca (5);
      OTF_tag_name (spec->langsys, langsys);
    }
  for (i = 0; i < 2; i++)
    {
      char *p;

      if (spec->features[i] && spec->features[i][1] != 0xFFFFFFFF)
	{
	  for (j = 0; spec->features[i][j]; j++);
	  if (i == 0)
	    p = gsub_features = alloca (6 * j);
	  else
	    p = gpos_features = alloca (6 * j);
	  for (j = 0; spec->features[i][j]; j++)
	    {
	      if (spec->features[i][j] == 0xFFFFFFFF)
		*p++ = '*', *p++ = ',';
	      else
		{
		  OTF_tag_name (spec->features[i][j], p);
		  p[4] = ',';
		  p += 5;
		}
	    }
	  *--p = '\0';
	}
    }

  if (otf_gstring.size == 0)
    {
      otf_gstring.glyphs = (OTF_Glyph *) malloc (sizeof (OTF_Glyph) * len);
      otf_gstring.size = len;
    }
  else if (otf_gstring.size < len)
    {
      otf_gstring.glyphs = (OTF_Glyph *) realloc (otf_gstring.glyphs,
						  sizeof (OTF_Glyph) * len);
      otf_gstring.size = len;
    }
  otf_gstring.used = len;
  memset (otf_gstring.glyphs, 0, sizeof (OTF_Glyph) * len);
  for (i = 0; i < len; i++)
    {
      otf_gstring.glyphs[i].c = in->glyphs[from + i].c;
      otf_gstring.glyphs[i].glyph_id = in->glyphs[from + i].code;
    }

  OTF_drive_gdef (otf, &otf_gstring);
  gidx = out->used;

  if (gsub_features)
    {
      if (OTF_drive_gsub (otf, &otf_gstring, script, langsys, gsub_features)
	  < 0)
	goto simple_copy;
      if (out->allocated < out->used + otf_gstring.used)
	return -2;
      for (i = 0, otfg = otf_gstring.glyphs; i < otf_gstring.used; i++, otfg++)
	{
	  MFLTGlyph *g = out->glyphs + out->used;
	  int j;

	  *g = in->glyphs[from + otfg->f.index.from];
	  g->c = 0;
	  for (j = from + otfg->f.index.from; j <= from + otfg->f.index.to; j++)
	    if (in->glyphs[j].code == otfg->glyph_id)
	      {
		g->c = in->glyphs[j].c;
		break;
	      }
	  if (g->code != otfg->glyph_id)
	    {
	      g->code = otfg->glyph_id;
	      g->measured = 0;
	    }
	  out->used++;
	}
    }
  else
    {
      if (out->allocated < out->used + len)
	return -2;
      for (i = 0; i < len; i++)
	out->glyphs[out->used++] = in->glyphs[from + i];
    }

  if (gpos_features)
    {
      MFLTGlyph *base = NULL, *mark = NULL, *g;
      int x_ppem, y_ppem, x_scale, y_scale;

      if (OTF_drive_gpos (otf, &otf_gstring, script, langsys, gpos_features)
	  < 0)
	return to;

      x_ppem = ft_face->size->metrics.x_ppem;
      y_ppem = ft_face->size->metrics.y_ppem;
      x_scale = ft_face->size->metrics.x_scale;
      y_scale = ft_face->size->metrics.y_scale;

      for (i = 0, otfg = otf_gstring.glyphs, g = out->glyphs + gidx;
	   i < otf_gstring.used; i++, otfg++, g++)
	{
	  MFLTGlyph *prev;

	  if (! otfg->glyph_id)
	    continue;
	  switch (otfg->positioning_type)
	    {
	    case 0:
	      break;
	    case 1: 		/* Single */
	    case 2: 		/* Pair */
	      {
		int format = otfg->f.f1.format;

		if (format & OTF_XPlacement)
		  adjustment[i].xoff
		    = otfg->f.f1.value->XPlacement * x_scale / 0x10000;
		if (format & OTF_XPlaDevice)
		  adjustment[i].xoff
		    += DEVICE_DELTA (otfg->f.f1.value->XPlaDevice, x_ppem);
		if (format & OTF_YPlacement)
		  adjustment[i].yoff
		    = - (otfg->f.f1.value->YPlacement * y_scale / 0x10000);
		if (format & OTF_YPlaDevice)
		  adjustment[i].yoff
		    -= DEVICE_DELTA (otfg->f.f1.value->YPlaDevice, y_ppem);
		if (format & OTF_XAdvance)
		  adjustment[i].xadv
		    += otfg->f.f1.value->XAdvance * x_scale / 0x10000;
		if (format & OTF_XAdvDevice)
		  adjustment[i].xadv
		    += DEVICE_DELTA (otfg->f.f1.value->XAdvDevice, x_ppem);
		if (format & OTF_YAdvance)
		  adjustment[i].yadv
		    += otfg->f.f1.value->YAdvance * y_scale / 0x10000;
		if (format & OTF_YAdvDevice)
		  adjustment[i].yadv
		    += DEVICE_DELTA (otfg->f.f1.value->YAdvDevice, y_ppem);
		adjustment[i].set = 1;
	      }
	      break;
	    case 3:		/* Cursive */
	      /* Not yet supported.  */
	      break;
	    case 4:		/* Mark-to-Base */
	    case 5:		/* Mark-to-Ligature */
	      if (! base)
		break;
	      prev = base;
	      goto label_adjust_anchor;
	    default:		/* i.e. case 6 Mark-to-Mark */
	      if (! mark)
		break;
	      prev = mark;

	    label_adjust_anchor:
	      {
		int base_x, base_y, mark_x, mark_y;
		int this_from, this_to;

		base_x = otfg->f.f4.base_anchor->XCoordinate * x_scale / 0x10000;
		base_y = otfg->f.f4.base_anchor->YCoordinate * y_scale / 0x10000;
		mark_x = otfg->f.f4.mark_anchor->XCoordinate * x_scale / 0x10000;
		mark_y = otfg->f.f4.mark_anchor->YCoordinate * y_scale / 0x10000;;

		if (otfg->f.f4.base_anchor->AnchorFormat != 1)
		  adjust_anchor (ft_face, otfg->f.f4.base_anchor,
				 prev->code, x_ppem, y_ppem, &base_x, &base_y);
		if (otfg->f.f4.mark_anchor->AnchorFormat != 1)
		  adjust_anchor (ft_face, otfg->f.f4.mark_anchor, g->code,
				 x_ppem, y_ppem, &mark_x, &mark_y);
		adjustment[i].xoff = (base_x - mark_x);
		adjustment[i].yoff = - (base_y - mark_y);
		adjustment[i].back = (g - prev);
		adjustment[i].xadv = 0;
		adjustment[i].advance_is_absolute = 1;
		adjustment[i].set = 1;
		this_from = g->from;
		this_to = g->to;
		for (j = 0; prev + j < g; j++)
		  {
		    if (this_from > prev[j].from)
		      this_from = prev[j].from;
		    if (this_to < prev[j].to)
		      this_to = prev[j].to;
		  }
		for (; prev <= g; prev++)
		  {
		    prev->from = this_from;
		    prev->to = this_to;
		  }
	      }
	    }
	  if (otfg->GlyphClass == OTF_GlyphClass0)
	    base = mark = g;
	  else if (otfg->GlyphClass == OTF_GlyphClassMark)
	    mark = g;
	  else
	    base = g;
	}
    }
  return to;

 simple_copy:
  if (out->allocated < out->used + len)
    return -2;
  font->get_metrics (font, in, from, to);
  memcpy (out->glyphs + out->used, in->glyphs + from,
	  sizeof (MFLTGlyph) * len);
  out->used += len;
  return to;
}

static MFLTGlyphString gstring;

static int m17n_flt_initialized;

extern Lisp_Object QCfamily;

Lisp_Object
ftfont_shape_by_flt (lgstring, font, ft_face, otf)
     Lisp_Object lgstring;
     struct font *font;
     FT_Face ft_face;
     OTF *otf;
{
  EMACS_UINT len = LGSTRING_LENGTH (lgstring);
  EMACS_UINT i;
  struct MFLTFontFT flt_font_ft;

  if (! m17n_flt_initialized)
    {
      M17N_INIT ();
      m17n_flt_initialized = 1;
    }

  for (i = 0; i < len; i++)
    if (NILP (LGSTRING_GLYPH (lgstring, i)))
      break;
  len = i;

  if (gstring.allocated == 0)
    {
      gstring.allocated = len * 2;
      gstring.glyph_size = sizeof (MFLTGlyph);
      gstring.glyphs = malloc (sizeof (MFLTGlyph) * gstring.allocated);
    }
  else if (gstring.allocated < len * 2)
    {
      gstring.allocated = len * 2;
      gstring.glyphs = realloc (gstring.glyphs,
				sizeof (MFLTGlyph) * gstring.allocated);
    }
  for (i = 0; i < len; i++)
    gstring.glyphs[i].c = LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, i));
  gstring.used = len;
  gstring.r2l = 0;

  {
    Lisp_Object family = Ffont_get (LGSTRING_FONT (lgstring), QCfamily);

    if (NILP (family))
      flt_font_ft.flt_font.family = Mnil;
    else
      flt_font_ft.flt_font.family = msymbol (SDATA (SYMBOL_NAME (family)));
  }
  flt_font_ft.flt_font.x_ppem = ft_face->size->metrics.x_ppem;
  flt_font_ft.flt_font.y_ppem = ft_face->size->metrics.y_ppem;
  flt_font_ft.flt_font.get_glyph_id = ftfont_get_glyph_id;
  flt_font_ft.flt_font.get_metrics = ftfont_get_metrics;
  flt_font_ft.flt_font.check_otf = ftfont_check_otf;
  flt_font_ft.flt_font.drive_otf = ftfont_drive_otf;
  flt_font_ft.flt_font.internal = NULL;
  flt_font_ft.font = font;
  flt_font_ft.ft_face = ft_face;
  flt_font_ft.otf = otf;
  for (i = 0; i < 3; i++)
    {
      int result = mflt_run (&gstring, 0, len, &flt_font_ft.flt_font, NULL);
      if (result != -2)
	break;
      gstring.allocated += gstring.allocated;
      gstring.glyphs = realloc (gstring.glyphs,
				sizeof (MFLTGlyph) * gstring.allocated);
    }
  if (gstring.used > LGSTRING_LENGTH (lgstring))
    return Qnil;
  for (i = 0; i < gstring.used; i++)
    {
      MFLTGlyph *g = gstring.glyphs + i;

      g->from = LGLYPH_FROM (LGSTRING_GLYPH (lgstring, g->from));
      g->to = LGLYPH_TO (LGSTRING_GLYPH (lgstring, g->to));
    }

  for (i = 0; i < gstring.used; i++)
    {
      Lisp_Object lglyph = LGSTRING_GLYPH (lgstring, i);
      MFLTGlyph *g = gstring.glyphs + i;

      LGLYPH_SET_FROM (lglyph, g->from);
      LGLYPH_SET_TO (lglyph, g->to);
      LGLYPH_SET_CHAR (lglyph, g->c);
      LGLYPH_SET_CODE (lglyph, g->code);
      LGLYPH_SET_WIDTH (lglyph, g->xadv >> 6);
      LGLYPH_SET_LBEARING (lglyph, g->lbearing >> 6);
      LGLYPH_SET_RBEARING (lglyph, g->rbearing >> 6);
      LGLYPH_SET_ASCENT (lglyph, g->ascent >> 6);
      LGLYPH_SET_DESCENT (lglyph, g->descent >> 6);
      if (g->adjusted)
	{
	  Lisp_Object vec;

	  vec = Fmake_vector (make_number (3), Qnil);
	  ASET (vec, 0, make_number (g->xoff >> 6));
	  ASET (vec, 1, make_number (g->yoff >> 6));
	  ASET (vec, 2, make_number (g->xadv >> 6));
	  LGLYPH_SET_ADJUSTMENT (lglyph, vec);
	}
    }
  return make_number (i);
}

Lisp_Object
ftfont_shape (lgstring)
     Lisp_Object lgstring;
{
  struct font *font;
  struct ftfont_info *ftfont_info;

  CHECK_FONT_GET_OBJECT (LGSTRING_FONT (lgstring), font);
  ftfont_info = (struct ftfont_info *) font;
  if (! ftfont_info->maybe_otf)
    return 0;
  if (! ftfont_info->otf)
    {
      OTF *otf = OTF_open_ft_face (ftfont_info->ft_size->face);

      if (! otf || OTF_get_table (otf, "head") < 0)
	{
	  if (otf)
	    OTF_close (otf);
	  ftfont_info->maybe_otf = 0;
	  return 0;
	}

      ftfont_info->otf = otf;
    }

  return ftfont_shape_by_flt (lgstring, font, ftfont_info->ft_size->face,
			      ftfont_info->otf);
}

#endif	/* HAVE_M17N_FLT */
#endif	/* HAVE_LIBOTF */

1500 1501 1502
Lisp_Object
ftfont_font_format (FcPattern *pattern)
{
1503
  FcChar8 *str;
1504

1505 1506
#ifdef FC_FONTFORMAT
  if (FcPatternGetString (pattern, FC_FONTFORMAT, 0, &str) != FcResultMatch)
1507
    return Qnil;
1508
  if (strcmp ((char *) str, "TrueType") == 0)
1509
    return intern ("truetype");
Jason Rumney's avatar
Jason Rumney committed
1510
  if (strcmp ((char *) str, "Type 1") == 0)
1511
    return intern ("type1");
Kenichi Handa's avatar