jdk

1
/*
2
 * Copyright © 2011,2014  Google, Inc.
3
 *
4
 *  This is part of HarfBuzz, a text shaping library.
5
 *
6
 * Permission is hereby granted, without written agreement and without
7
 * license or royalty fees, to use, copy, modify, and distribute this
8
 * software and its documentation for any purpose, provided that the
9
 * above copyright notice and the following two paragraphs appear in
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 * all copies of this software.
11
 *
12
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16
 * DAMAGE.
17
 *
18
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
21
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23
 *
24
 * Google Author(s): Behdad Esfahbod, Roozbeh Pournader
25
 */
26

27
#include "hb.hh"
28

29
#ifndef HB_NO_OT_FONT
30

31
#include "hb-ot.h"
32

33
#include "hb-cache.hh"
34
#include "hb-font.hh"
35
#include "hb-machinery.hh"
36
#include "hb-ot-face.hh"
37
#include "hb-outline.hh"
38

39
#include "hb-ot-cmap-table.hh"
40
#include "hb-ot-glyf-table.hh"
41
#include "hb-ot-cff2-table.hh"
42
#include "hb-ot-cff1-table.hh"
43
#include "hb-ot-hmtx-table.hh"
44
#include "hb-ot-post-table.hh"
45
#include "hb-ot-stat-table.hh" // Just so we compile it; unused otherwise.
46
#include "hb-ot-vorg-table.hh"
47
#include "OT/Color/CBDT/CBDT.hh"
48
#include "OT/Color/COLR/COLR.hh"
49
#include "OT/Color/sbix/sbix.hh"
50
#include "OT/Color/svg/svg.hh"
51

52

53
/**
54
 * SECTION:hb-ot-font
55
 * @title: hb-ot-font
56
 * @short_description: OpenType font implementation
57
 * @include: hb-ot.h
58
 *
59
 * Functions for using OpenType fonts with hb_shape().  Note that fonts returned
60
 * by hb_font_create() default to using these functions, so most clients would
61
 * never need to call these functions directly.
62
 **/
63

64
using hb_ot_font_cmap_cache_t    = hb_cache_t<21, 16, 8, true>;
65
using hb_ot_font_advance_cache_t = hb_cache_t<24, 16, 8, true>;
66

67
#ifndef HB_NO_OT_FONT_CMAP_CACHE
68
static hb_user_data_key_t hb_ot_font_cmap_cache_user_data_key;
69
#endif
70

71
struct hb_ot_font_t
72
{
73
  const hb_ot_face_t *ot_face;
74

75
#ifndef HB_NO_OT_FONT_CMAP_CACHE
76
  hb_ot_font_cmap_cache_t *cmap_cache;
77
#endif
78

79
  /* h_advance caching */
80
  mutable hb_atomic_int_t cached_coords_serial;
81
  mutable hb_atomic_ptr_t<hb_ot_font_advance_cache_t> advance_cache;
82
};
83

84
static hb_ot_font_t *
85
_hb_ot_font_create (hb_font_t *font)
86
{
87
  hb_ot_font_t *ot_font = (hb_ot_font_t *) hb_calloc (1, sizeof (hb_ot_font_t));
88
  if (unlikely (!ot_font))
89
    return nullptr;
90

91
  ot_font->ot_face = &font->face->table;
92

93
#ifndef HB_NO_OT_FONT_CMAP_CACHE
94
  // retry:
95
  auto *cmap_cache  = (hb_ot_font_cmap_cache_t *) hb_face_get_user_data (font->face,
96
                                                                         &hb_ot_font_cmap_cache_user_data_key);
97
  if (!cmap_cache)
98
  {
99
    cmap_cache = (hb_ot_font_cmap_cache_t *) hb_malloc (sizeof (hb_ot_font_cmap_cache_t));
100
    if (unlikely (!cmap_cache)) goto out;
101
    new (cmap_cache) hb_ot_font_cmap_cache_t ();
102
    if (unlikely (!hb_face_set_user_data (font->face,
103
                                          &hb_ot_font_cmap_cache_user_data_key,
104
                                          cmap_cache,
105
                                          hb_free,
106
                                          false)))
107
    {
108
      hb_free (cmap_cache);
109
      cmap_cache = nullptr;
110
      /* Normally we would retry here, but that would
111
       * infinite-loop if the face is the empty-face.
112
       * Just let it go and this font will be uncached if it
113
       * happened to collide with another thread creating the
114
       * cache at the same time. */
115
      // goto retry;
116
    }
117
  }
118
  out:
119
  ot_font->cmap_cache = cmap_cache;
120
#endif
121

122
  return ot_font;
123
}
124

125
static void
126
_hb_ot_font_destroy (void *font_data)
127
{
128
  hb_ot_font_t *ot_font = (hb_ot_font_t *) font_data;
129

130
  auto *cache = ot_font->advance_cache.get_relaxed ();
131
  hb_free (cache);
132

133
  hb_free (ot_font);
134
}
135

136
static hb_bool_t
137
hb_ot_get_nominal_glyph (hb_font_t *font HB_UNUSED,
138
                         void *font_data,
139
                         hb_codepoint_t unicode,
140
                         hb_codepoint_t *glyph,
141
                         void *user_data HB_UNUSED)
142
{
143
  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
144
  const hb_ot_face_t *ot_face = ot_font->ot_face;
145
  hb_ot_font_cmap_cache_t *cmap_cache = nullptr;
146
#ifndef HB_NO_OT_FONT_CMAP_CACHE
147
  cmap_cache = ot_font->cmap_cache;
148
#endif
149
  return ot_face->cmap->get_nominal_glyph (unicode, glyph, cmap_cache);
150
}
151

152
static unsigned int
153
hb_ot_get_nominal_glyphs (hb_font_t *font HB_UNUSED,
154
                          void *font_data,
155
                          unsigned int count,
156
                          const hb_codepoint_t *first_unicode,
157
                          unsigned int unicode_stride,
158
                          hb_codepoint_t *first_glyph,
159
                          unsigned int glyph_stride,
160
                          void *user_data HB_UNUSED)
161
{
162
  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
163
  const hb_ot_face_t *ot_face = ot_font->ot_face;
164
  hb_ot_font_cmap_cache_t *cmap_cache = nullptr;
165
#ifndef HB_NO_OT_FONT_CMAP_CACHE
166
  cmap_cache = ot_font->cmap_cache;
167
#endif
168
  return ot_face->cmap->get_nominal_glyphs (count,
169
                                            first_unicode, unicode_stride,
170
                                            first_glyph, glyph_stride,
171
                                            cmap_cache);
172
}
173

174
static hb_bool_t
175
hb_ot_get_variation_glyph (hb_font_t *font HB_UNUSED,
176
                           void *font_data,
177
                           hb_codepoint_t unicode,
178
                           hb_codepoint_t variation_selector,
179
                           hb_codepoint_t *glyph,
180
                           void *user_data HB_UNUSED)
181
{
182
  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
183
  const hb_ot_face_t *ot_face = ot_font->ot_face;
184
  hb_ot_font_cmap_cache_t *cmap_cache = nullptr;
185
#ifndef HB_NO_OT_FONT_CMAP_CACHE
186
  cmap_cache = ot_font->cmap_cache;
187
#endif
188
  return ot_face->cmap->get_variation_glyph (unicode,
189
                                             variation_selector, glyph,
190
                                             cmap_cache);
191
}
192

193
static void
194
hb_ot_get_glyph_h_advances (hb_font_t* font, void* font_data,
195
                            unsigned count,
196
                            const hb_codepoint_t *first_glyph,
197
                            unsigned glyph_stride,
198
                            hb_position_t *first_advance,
199
                            unsigned advance_stride,
200
                            void *user_data HB_UNUSED)
201
{
202

203
  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
204
  const hb_ot_face_t *ot_face = ot_font->ot_face;
205
  const OT::hmtx_accelerator_t &hmtx = *ot_face->hmtx;
206

207
  hb_position_t *orig_first_advance = first_advance;
208

209
#if !defined(HB_NO_VAR) && !defined(HB_NO_OT_FONT_ADVANCE_CACHE)
210
  const OT::HVAR &HVAR = *hmtx.var_table;
211
  const OT::VariationStore &varStore = &HVAR + HVAR.varStore;
212
  OT::VariationStore::cache_t *varStore_cache = font->num_coords * count >= 128 ? varStore.create_cache () : nullptr;
213

214
  bool use_cache = font->num_coords;
215
#else
216
  OT::VariationStore::cache_t *varStore_cache = nullptr;
217
  bool use_cache = false;
218
#endif
219

220
  hb_ot_font_advance_cache_t *cache = nullptr;
221
  if (use_cache)
222
  {
223
  retry:
224
    cache = ot_font->advance_cache.get_acquire ();
225
    if (unlikely (!cache))
226
    {
227
      cache = (hb_ot_font_advance_cache_t *) hb_malloc (sizeof (hb_ot_font_advance_cache_t));
228
      if (unlikely (!cache))
229
      {
230
        use_cache = false;
231
        goto out;
232
      }
233
      new (cache) hb_ot_font_advance_cache_t;
234

235
      if (unlikely (!ot_font->advance_cache.cmpexch (nullptr, cache)))
236
      {
237
        hb_free (cache);
238
        goto retry;
239
      }
240
      ot_font->cached_coords_serial.set_release (font->serial_coords);
241
    }
242
  }
243
  out:
244

245
  if (!use_cache)
246
  {
247
    for (unsigned int i = 0; i < count; i++)
248
    {
249
      *first_advance = font->em_scale_x (hmtx.get_advance_with_var_unscaled (*first_glyph, font, varStore_cache));
250
      first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
251
      first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
252
    }
253
  }
254
  else
255
  { /* Use cache. */
256
    if (ot_font->cached_coords_serial.get_acquire () != (int) font->serial_coords)
257
    {
258
      ot_font->advance_cache->clear ();
259
      ot_font->cached_coords_serial.set_release (font->serial_coords);
260
    }
261

262
    for (unsigned int i = 0; i < count; i++)
263
    {
264
      hb_position_t v;
265
      unsigned cv;
266
      if (ot_font->advance_cache->get (*first_glyph, &cv))
267
        v = cv;
268
      else
269
      {
270
        v = hmtx.get_advance_with_var_unscaled (*first_glyph, font, varStore_cache);
271
        ot_font->advance_cache->set (*first_glyph, v);
272
      }
273
      *first_advance = font->em_scale_x (v);
274
      first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
275
      first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
276
    }
277
  }
278

279
#if !defined(HB_NO_VAR) && !defined(HB_NO_OT_FONT_ADVANCE_CACHE)
280
  OT::VariationStore::destroy_cache (varStore_cache);
281
#endif
282

283
  if (font->x_strength && !font->embolden_in_place)
284
  {
285
    /* Emboldening. */
286
    hb_position_t x_strength = font->x_scale >= 0 ? font->x_strength : -font->x_strength;
287
    first_advance = orig_first_advance;
288
    for (unsigned int i = 0; i < count; i++)
289
    {
290
      *first_advance += *first_advance ? x_strength : 0;
291
      first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
292
    }
293
  }
294
}
295

296
#ifndef HB_NO_VERTICAL
297
static void
298
hb_ot_get_glyph_v_advances (hb_font_t* font, void* font_data,
299
                            unsigned count,
300
                            const hb_codepoint_t *first_glyph,
301
                            unsigned glyph_stride,
302
                            hb_position_t *first_advance,
303
                            unsigned advance_stride,
304
                            void *user_data HB_UNUSED)
305
{
306
  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
307
  const hb_ot_face_t *ot_face = ot_font->ot_face;
308
  const OT::vmtx_accelerator_t &vmtx = *ot_face->vmtx;
309

310
  hb_position_t *orig_first_advance = first_advance;
311

312
  if (vmtx.has_data ())
313
  {
314
#if !defined(HB_NO_VAR) && !defined(HB_NO_OT_FONT_ADVANCE_CACHE)
315
    const OT::VVAR &VVAR = *vmtx.var_table;
316
    const OT::VariationStore &varStore = &VVAR + VVAR.varStore;
317
    OT::VariationStore::cache_t *varStore_cache = font->num_coords ? varStore.create_cache () : nullptr;
318
#else
319
    OT::VariationStore::cache_t *varStore_cache = nullptr;
320
#endif
321

322
    for (unsigned int i = 0; i < count; i++)
323
    {
324
      *first_advance = font->em_scale_y (-(int) vmtx.get_advance_with_var_unscaled (*first_glyph, font, varStore_cache));
325
      first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
326
      first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
327
    }
328

329
#if !defined(HB_NO_VAR) && !defined(HB_NO_OT_FONT_ADVANCE_CACHE)
330
    OT::VariationStore::destroy_cache (varStore_cache);
331
#endif
332
  }
333
  else
334
  {
335
    hb_font_extents_t font_extents;
336
    font->get_h_extents_with_fallback (&font_extents);
337
    hb_position_t advance = -(font_extents.ascender - font_extents.descender);
338

339
    for (unsigned int i = 0; i < count; i++)
340
    {
341
      *first_advance = advance;
342
      first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
343
      first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
344
    }
345
  }
346

347
  if (font->y_strength && !font->embolden_in_place)
348
  {
349
    /* Emboldening. */
350
    hb_position_t y_strength = font->y_scale >= 0 ? font->y_strength : -font->y_strength;
351
    first_advance = orig_first_advance;
352
    for (unsigned int i = 0; i < count; i++)
353
    {
354
      *first_advance += *first_advance ? y_strength : 0;
355
      first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
356
    }
357
  }
358
}
359
#endif
360

361
#ifndef HB_NO_VERTICAL
362
static hb_bool_t
363
hb_ot_get_glyph_v_origin (hb_font_t *font,
364
                          void *font_data,
365
                          hb_codepoint_t glyph,
366
                          hb_position_t *x,
367
                          hb_position_t *y,
368
                          void *user_data HB_UNUSED)
369
{
370
  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
371
  const hb_ot_face_t *ot_face = ot_font->ot_face;
372

373
  *x = font->get_glyph_h_advance (glyph) / 2;
374

375
  const OT::VORG &VORG = *ot_face->VORG;
376
  if (VORG.has_data ())
377
  {
378
    float delta = 0;
379

380
#ifndef HB_NO_VAR
381
    const OT::vmtx_accelerator_t &vmtx = *ot_face->vmtx;
382
    const OT::VVAR &VVAR = *vmtx.var_table;
383
    if (font->num_coords)
384
      VVAR.get_vorg_delta_unscaled (glyph,
385
                                    font->coords, font->num_coords,
386
                                    &delta);
387
#endif
388

389
    *y = font->em_scalef_y (VORG.get_y_origin (glyph) + delta);
390
    return true;
391
  }
392

393
  hb_glyph_extents_t extents = {0};
394
  if (ot_face->glyf->get_extents (font, glyph, &extents))
395
  {
396
    const OT::vmtx_accelerator_t &vmtx = *ot_face->vmtx;
397
    int tsb = 0;
398
    if (vmtx.get_leading_bearing_with_var_unscaled (font, glyph, &tsb))
399
    {
400
      *y = extents.y_bearing + font->em_scale_y (tsb);
401
      return true;
402
    }
403

404
    hb_font_extents_t font_extents;
405
    font->get_h_extents_with_fallback (&font_extents);
406
    hb_position_t advance = font_extents.ascender - font_extents.descender;
407
    int diff = advance - -extents.height;
408
    *y = extents.y_bearing + (diff >> 1);
409
    return true;
410
  }
411

412
  hb_font_extents_t font_extents;
413
  font->get_h_extents_with_fallback (&font_extents);
414
  *y = font_extents.ascender;
415

416
  return true;
417
}
418
#endif
419

420
static hb_bool_t
421
hb_ot_get_glyph_extents (hb_font_t *font,
422
                         void *font_data,
423
                         hb_codepoint_t glyph,
424
                         hb_glyph_extents_t *extents,
425
                         void *user_data HB_UNUSED)
426
{
427
  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
428
  const hb_ot_face_t *ot_face = ot_font->ot_face;
429

430
#if !defined(HB_NO_OT_FONT_BITMAP) && !defined(HB_NO_COLOR)
431
  if (ot_face->sbix->get_extents (font, glyph, extents)) return true;
432
  if (ot_face->CBDT->get_extents (font, glyph, extents)) return true;
433
#endif
434
#if !defined(HB_NO_COLOR) && !defined(HB_NO_PAINT)
435
  if (ot_face->COLR->get_extents (font, glyph, extents)) return true;
436
#endif
437
  if (ot_face->glyf->get_extents (font, glyph, extents)) return true;
438
#ifndef HB_NO_OT_FONT_CFF
439
  if (ot_face->cff2->get_extents (font, glyph, extents)) return true;
440
  if (ot_face->cff1->get_extents (font, glyph, extents)) return true;
441
#endif
442

443
  return false;
444
}
445

446
#ifndef HB_NO_OT_FONT_GLYPH_NAMES
447
static hb_bool_t
448
hb_ot_get_glyph_name (hb_font_t *font HB_UNUSED,
449
                      void *font_data,
450
                      hb_codepoint_t glyph,
451
                      char *name, unsigned int size,
452
                      void *user_data HB_UNUSED)
453
{
454
  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
455
  const hb_ot_face_t *ot_face = ot_font->ot_face;
456

457
  if (ot_face->post->get_glyph_name (glyph, name, size)) return true;
458
#ifndef HB_NO_OT_FONT_CFF
459
  if (ot_face->cff1->get_glyph_name (glyph, name, size)) return true;
460
#endif
461
  return false;
462
}
463
static hb_bool_t
464
hb_ot_get_glyph_from_name (hb_font_t *font HB_UNUSED,
465
                           void *font_data,
466
                           const char *name, int len,
467
                           hb_codepoint_t *glyph,
468
                           void *user_data HB_UNUSED)
469
{
470
  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
471
  const hb_ot_face_t *ot_face = ot_font->ot_face;
472

473
  if (ot_face->post->get_glyph_from_name (name, len, glyph)) return true;
474
#ifndef HB_NO_OT_FONT_CFF
475
    if (ot_face->cff1->get_glyph_from_name (name, len, glyph)) return true;
476
#endif
477
  return false;
478
}
479
#endif
480

481
static hb_bool_t
482
hb_ot_get_font_h_extents (hb_font_t *font,
483
                          void *font_data HB_UNUSED,
484
                          hb_font_extents_t *metrics,
485
                          void *user_data HB_UNUSED)
486
{
487
  bool ret = _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_HORIZONTAL_ASCENDER, &metrics->ascender) &&
488
             _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_HORIZONTAL_DESCENDER, &metrics->descender) &&
489
             _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_HORIZONTAL_LINE_GAP, &metrics->line_gap);
490

491
  /* Embolden */
492
  int y_shift = font->y_strength;
493
  if (font->y_scale < 0) y_shift = -y_shift;
494
  metrics->ascender += y_shift;
495

496
  return ret;
497
}
498

499
#ifndef HB_NO_VERTICAL
500
static hb_bool_t
501
hb_ot_get_font_v_extents (hb_font_t *font,
502
                          void *font_data HB_UNUSED,
503
                          hb_font_extents_t *metrics,
504
                          void *user_data HB_UNUSED)
505
{
506
  return _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_VERTICAL_ASCENDER, &metrics->ascender) &&
507
         _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_VERTICAL_DESCENDER, &metrics->descender) &&
508
         _hb_ot_metrics_get_position_common (font, HB_OT_METRICS_TAG_VERTICAL_LINE_GAP, &metrics->line_gap);
509
}
510
#endif
511

512
#ifndef HB_NO_DRAW
513
static void
514
hb_ot_draw_glyph (hb_font_t *font,
515
                  void *font_data HB_UNUSED,
516
                  hb_codepoint_t glyph,
517
                  hb_draw_funcs_t *draw_funcs, void *draw_data,
518
                  void *user_data)
519
{
520
  bool embolden = font->x_strength || font->y_strength;
521
  hb_outline_t outline;
522

523
  { // Need draw_session to be destructed before emboldening.
524
    hb_draw_session_t draw_session (embolden ? hb_outline_recording_pen_get_funcs () : draw_funcs,
525
                                    embolden ? &outline : draw_data, font->slant_xy);
526
    if (!font->face->table.glyf->get_path (font, glyph, draw_session))
527
#ifndef HB_NO_CFF
528
    if (!font->face->table.cff2->get_path (font, glyph, draw_session))
529
    if (!font->face->table.cff1->get_path (font, glyph, draw_session))
530
#endif
531
    {}
532
  }
533

534
  if (embolden)
535
  {
536
    float x_shift = font->embolden_in_place ? 0 : (float) font->x_strength / 2;
537
    float y_shift = (float) font->y_strength / 2;
538
    if (font->x_scale < 0) x_shift = -x_shift;
539
    if (font->y_scale < 0) y_shift = -y_shift;
540
    outline.embolden (font->x_strength, font->y_strength,
541
                      x_shift, y_shift);
542

543
    outline.replay (draw_funcs, draw_data);
544
  }
545
}
546
#endif
547

548
#ifndef HB_NO_PAINT
549
static void
550
hb_ot_paint_glyph (hb_font_t *font,
551
                   void *font_data,
552
                   hb_codepoint_t glyph,
553
                   hb_paint_funcs_t *paint_funcs, void *paint_data,
554
                   unsigned int palette,
555
                   hb_color_t foreground,
556
                   void *user_data)
557
{
558
#ifndef HB_NO_COLOR
559
  if (font->face->table.COLR->paint_glyph (font, glyph, paint_funcs, paint_data, palette, foreground)) return;
560
  if (font->face->table.SVG->paint_glyph (font, glyph, paint_funcs, paint_data)) return;
561
#ifndef HB_NO_OT_FONT_BITMAP
562
  if (font->face->table.CBDT->paint_glyph (font, glyph, paint_funcs, paint_data)) return;
563
  if (font->face->table.sbix->paint_glyph (font, glyph, paint_funcs, paint_data)) return;
564
#endif
565
#endif
566
  if (font->face->table.glyf->paint_glyph (font, glyph, paint_funcs, paint_data, foreground)) return;
567
#ifndef HB_NO_CFF
568
  if (font->face->table.cff2->paint_glyph (font, glyph, paint_funcs, paint_data, foreground)) return;
569
  if (font->face->table.cff1->paint_glyph (font, glyph, paint_funcs, paint_data, foreground)) return;
570
#endif
571
}
572
#endif
573

574
static inline void free_static_ot_funcs ();
575

576
static struct hb_ot_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ot_font_funcs_lazy_loader_t>
577
{
578
  static hb_font_funcs_t *create ()
579
  {
580
    hb_font_funcs_t *funcs = hb_font_funcs_create ();
581

582
    hb_font_funcs_set_nominal_glyph_func (funcs, hb_ot_get_nominal_glyph, nullptr, nullptr);
583
    hb_font_funcs_set_nominal_glyphs_func (funcs, hb_ot_get_nominal_glyphs, nullptr, nullptr);
584
    hb_font_funcs_set_variation_glyph_func (funcs, hb_ot_get_variation_glyph, nullptr, nullptr);
585

586
    hb_font_funcs_set_font_h_extents_func (funcs, hb_ot_get_font_h_extents, nullptr, nullptr);
587
    hb_font_funcs_set_glyph_h_advances_func (funcs, hb_ot_get_glyph_h_advances, nullptr, nullptr);
588
    //hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ot_get_glyph_h_origin, nullptr, nullptr);
589

590
#ifndef HB_NO_VERTICAL
591
    hb_font_funcs_set_font_v_extents_func (funcs, hb_ot_get_font_v_extents, nullptr, nullptr);
592
    hb_font_funcs_set_glyph_v_advances_func (funcs, hb_ot_get_glyph_v_advances, nullptr, nullptr);
593
    hb_font_funcs_set_glyph_v_origin_func (funcs, hb_ot_get_glyph_v_origin, nullptr, nullptr);
594
#endif
595

596
#ifndef HB_NO_DRAW
597
    hb_font_funcs_set_draw_glyph_func (funcs, hb_ot_draw_glyph, nullptr, nullptr);
598
#endif
599

600
#ifndef HB_NO_PAINT
601
    hb_font_funcs_set_paint_glyph_func (funcs, hb_ot_paint_glyph, nullptr, nullptr);
602
#endif
603

604
    hb_font_funcs_set_glyph_extents_func (funcs, hb_ot_get_glyph_extents, nullptr, nullptr);
605
    //hb_font_funcs_set_glyph_contour_point_func (funcs, hb_ot_get_glyph_contour_point, nullptr, nullptr);
606

607
#ifndef HB_NO_OT_FONT_GLYPH_NAMES
608
    hb_font_funcs_set_glyph_name_func (funcs, hb_ot_get_glyph_name, nullptr, nullptr);
609
    hb_font_funcs_set_glyph_from_name_func (funcs, hb_ot_get_glyph_from_name, nullptr, nullptr);
610
#endif
611

612
    hb_font_funcs_make_immutable (funcs);
613

614
    hb_atexit (free_static_ot_funcs);
615

616
    return funcs;
617
  }
618
} static_ot_funcs;
619

620
static inline
621
void free_static_ot_funcs ()
622
{
623
  static_ot_funcs.free_instance ();
624
}
625

626
static hb_font_funcs_t *
627
_hb_ot_get_font_funcs ()
628
{
629
  return static_ot_funcs.get_unconst ();
630
}
631

632

633
/**
634
 * hb_ot_font_set_funcs:
635
 * @font: #hb_font_t to work upon
636
 *
637
 * Sets the font functions to use when working with @font.
638
 *
639
 * Since: 0.9.28
640
 **/
641
void
642
hb_ot_font_set_funcs (hb_font_t *font)
643
{
644
  hb_ot_font_t *ot_font = _hb_ot_font_create (font);
645
  if (unlikely (!ot_font))
646
    return;
647

648
  hb_font_set_funcs (font,
649
                     _hb_ot_get_font_funcs (),
650
                     ot_font,
651
                     _hb_ot_font_destroy);
652
}
653

654
#endif
655