1 /*
2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2012 Google, Inc.
4 *
5 * This is part of HarfBuzz, a text shaping library.
6 *
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
12 *
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
17 * DAMAGE.
18 *
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 *
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod
27 */
28
29 #include "hb-private.hh"
30
31 #include "hb-font-private.hh"
32
33
34 /*
35 * hb_font_funcs_t
36 */
37
38 static hb_bool_t
39 hb_font_get_font_h_extents_nil (hb_font_t *font HB_UNUSED,
40 void *font_data HB_UNUSED,
41 hb_font_extents_t *metrics,
42 void *user_data HB_UNUSED)
43 {
44 memset (metrics, 0, sizeof (*metrics));
45 return false;
46 }
47 static hb_bool_t
48 hb_font_get_font_h_extents_parent (hb_font_t *font,
49 void *font_data HB_UNUSED,
50 hb_font_extents_t *metrics,
51 void *user_data HB_UNUSED)
52 {
53 hb_bool_t ret = font->parent->get_font_h_extents (metrics);
54 if (ret) {
55 metrics->ascender = font->parent_scale_y_distance (metrics->ascender);
56 metrics->descender = font->parent_scale_y_distance (metrics->descender);
57 metrics->line_gap = font->parent_scale_y_distance (metrics->line_gap);
58 }
59 return ret;
60 }
61
62 static hb_bool_t
63 hb_font_get_font_v_extents_nil (hb_font_t *font HB_UNUSED,
64 void *font_data HB_UNUSED,
65 hb_font_extents_t *metrics,
66 void *user_data HB_UNUSED)
67 {
68 memset (metrics, 0, sizeof (*metrics));
69 return false;
70 }
71 static hb_bool_t
72 hb_font_get_font_v_extents_parent (hb_font_t *font,
73 void *font_data HB_UNUSED,
74 hb_font_extents_t *metrics,
75 void *user_data HB_UNUSED)
76 {
77 hb_bool_t ret = font->parent->get_font_v_extents (metrics);
78 if (ret) {
79 metrics->ascender = font->parent_scale_x_distance (metrics->ascender);
80 metrics->descender = font->parent_scale_x_distance (metrics->descender);
81 metrics->line_gap = font->parent_scale_x_distance (metrics->line_gap);
82 }
83 return ret;
84 }
85
86 static hb_bool_t
87 hb_font_get_nominal_glyph_nil (hb_font_t *font HB_UNUSED,
88 void *font_data HB_UNUSED,
89 hb_codepoint_t unicode,
90 hb_codepoint_t *glyph,
91 void *user_data HB_UNUSED)
92 {
93 *glyph = 0;
94 return false;
95 }
96 static hb_bool_t
97 hb_font_get_nominal_glyph_parent (hb_font_t *font,
98 void *font_data HB_UNUSED,
99 hb_codepoint_t unicode,
100 hb_codepoint_t *glyph,
101 void *user_data HB_UNUSED)
102 {
103 return font->parent->get_nominal_glyph (unicode, glyph);
104 }
105
106 static hb_bool_t
107 hb_font_get_variation_glyph_nil (hb_font_t *font HB_UNUSED,
108 void *font_data HB_UNUSED,
109 hb_codepoint_t unicode,
110 hb_codepoint_t variation_selector,
111 hb_codepoint_t *glyph,
112 void *user_data HB_UNUSED)
113 {
114 *glyph = 0;
115 return false;
116 }
117 static hb_bool_t
118 hb_font_get_variation_glyph_parent (hb_font_t *font,
119 void *font_data HB_UNUSED,
120 hb_codepoint_t unicode,
121 hb_codepoint_t variation_selector,
122 hb_codepoint_t *glyph,
123 void *user_data HB_UNUSED)
124 {
125 return font->parent->get_variation_glyph (unicode, variation_selector, glyph);
126 }
127
128
129 static hb_position_t
130 hb_font_get_glyph_h_advance_nil (hb_font_t *font HB_UNUSED,
131 void *font_data HB_UNUSED,
132 hb_codepoint_t glyph,
133 void *user_data HB_UNUSED)
134 {
135 return font->x_scale;
136 }
137 static hb_position_t
138 hb_font_get_glyph_h_advance_parent (hb_font_t *font,
139 void *font_data HB_UNUSED,
140 hb_codepoint_t glyph,
141 void *user_data HB_UNUSED)
142 {
143 return font->parent_scale_x_distance (font->parent->get_glyph_h_advance (glyph));
144 }
145
146 static hb_position_t
147 hb_font_get_glyph_v_advance_nil (hb_font_t *font HB_UNUSED,
148 void *font_data HB_UNUSED,
149 hb_codepoint_t glyph,
150 void *user_data HB_UNUSED)
151 {
152 /* TODO use font_extents.ascender+descender */
153 return font->y_scale;
154 }
155 static hb_position_t
156 hb_font_get_glyph_v_advance_parent (hb_font_t *font,
157 void *font_data HB_UNUSED,
158 hb_codepoint_t glyph,
159 void *user_data HB_UNUSED)
160 {
161 return font->parent_scale_y_distance (font->parent->get_glyph_v_advance (glyph));
162 }
163
164 static hb_bool_t
165 hb_font_get_glyph_h_origin_nil (hb_font_t *font HB_UNUSED,
166 void *font_data HB_UNUSED,
167 hb_codepoint_t glyph,
168 hb_position_t *x,
169 hb_position_t *y,
170 void *user_data HB_UNUSED)
171 {
172 *x = *y = 0;
173 return true;
174 }
175 static hb_bool_t
176 hb_font_get_glyph_h_origin_parent (hb_font_t *font,
177 void *font_data HB_UNUSED,
178 hb_codepoint_t glyph,
179 hb_position_t *x,
180 hb_position_t *y,
181 void *user_data HB_UNUSED)
182 {
183 hb_bool_t ret = font->parent->get_glyph_h_origin (glyph, x, y);
184 if (ret)
185 font->parent_scale_position (x, y);
186 return ret;
187 }
188
189 static hb_bool_t
190 hb_font_get_glyph_v_origin_nil (hb_font_t *font HB_UNUSED,
191 void *font_data HB_UNUSED,
192 hb_codepoint_t glyph,
193 hb_position_t *x,
194 hb_position_t *y,
195 void *user_data HB_UNUSED)
196 {
197 *x = *y = 0;
198 return false;
199 }
200 static hb_bool_t
201 hb_font_get_glyph_v_origin_parent (hb_font_t *font,
202 void *font_data HB_UNUSED,
203 hb_codepoint_t glyph,
204 hb_position_t *x,
205 hb_position_t *y,
206 void *user_data HB_UNUSED)
207 {
208 hb_bool_t ret = font->parent->get_glyph_v_origin (glyph, x, y);
209 if (ret)
210 font->parent_scale_position (x, y);
211 return ret;
212 }
213
214 static hb_position_t
215 hb_font_get_glyph_h_kerning_nil (hb_font_t *font HB_UNUSED,
216 void *font_data HB_UNUSED,
217 hb_codepoint_t left_glyph,
218 hb_codepoint_t right_glyph,
219 void *user_data HB_UNUSED)
220 {
221 return 0;
222 }
223 static hb_position_t
224 hb_font_get_glyph_h_kerning_parent (hb_font_t *font,
225 void *font_data HB_UNUSED,
226 hb_codepoint_t left_glyph,
227 hb_codepoint_t right_glyph,
228 void *user_data HB_UNUSED)
229 {
230 return font->parent_scale_x_distance (font->parent->get_glyph_h_kerning (left_glyph, right_glyph));
231 }
232
233 static hb_position_t
234 hb_font_get_glyph_v_kerning_nil (hb_font_t *font HB_UNUSED,
235 void *font_data HB_UNUSED,
236 hb_codepoint_t top_glyph,
237 hb_codepoint_t bottom_glyph,
238 void *user_data HB_UNUSED)
239 {
240 return 0;
241 }
242 static hb_position_t
243 hb_font_get_glyph_v_kerning_parent (hb_font_t *font,
244 void *font_data HB_UNUSED,
245 hb_codepoint_t top_glyph,
246 hb_codepoint_t bottom_glyph,
247 void *user_data HB_UNUSED)
248 {
249 return font->parent_scale_y_distance (font->parent->get_glyph_v_kerning (top_glyph, bottom_glyph));
250 }
251
252 static hb_bool_t
253 hb_font_get_glyph_extents_nil (hb_font_t *font HB_UNUSED,
254 void *font_data HB_UNUSED,
255 hb_codepoint_t glyph,
256 hb_glyph_extents_t *extents,
257 void *user_data HB_UNUSED)
258 {
259 memset (extents, 0, sizeof (*extents));
260 return false;
261 }
262 static hb_bool_t
263 hb_font_get_glyph_extents_parent (hb_font_t *font,
264 void *font_data HB_UNUSED,
265 hb_codepoint_t glyph,
266 hb_glyph_extents_t *extents,
267 void *user_data HB_UNUSED)
268 {
269 hb_bool_t ret = font->parent->get_glyph_extents (glyph, extents);
270 if (ret) {
271 font->parent_scale_position (&extents->x_bearing, &extents->y_bearing);
272 font->parent_scale_distance (&extents->width, &extents->height);
273 }
274 return ret;
275 }
276
277 static hb_bool_t
278 hb_font_get_glyph_contour_point_nil (hb_font_t *font HB_UNUSED,
279 void *font_data HB_UNUSED,
280 hb_codepoint_t glyph,
281 unsigned int point_index,
282 hb_position_t *x,
283 hb_position_t *y,
284 void *user_data HB_UNUSED)
285 {
286 *x = *y = 0;
287 return false;
288 }
289 static hb_bool_t
290 hb_font_get_glyph_contour_point_parent (hb_font_t *font,
291 void *font_data HB_UNUSED,
292 hb_codepoint_t glyph,
293 unsigned int point_index,
294 hb_position_t *x,
295 hb_position_t *y,
296 void *user_data HB_UNUSED)
297 {
298 hb_bool_t ret = font->parent->get_glyph_contour_point (glyph, point_index, x, y);
299 if (ret)
300 font->parent_scale_position (x, y);
301 return ret;
302 }
303
304 static hb_bool_t
305 hb_font_get_glyph_name_nil (hb_font_t *font HB_UNUSED,
306 void *font_data HB_UNUSED,
307 hb_codepoint_t glyph,
308 char *name, unsigned int size,
309 void *user_data HB_UNUSED)
310 {
311 if (size) *name = '\0';
312 return false;
313 }
314 static hb_bool_t
315 hb_font_get_glyph_name_parent (hb_font_t *font,
316 void *font_data HB_UNUSED,
317 hb_codepoint_t glyph,
318 char *name, unsigned int size,
319 void *user_data HB_UNUSED)
320 {
321 return font->parent->get_glyph_name (glyph, name, size);
322 }
323
324 static hb_bool_t
325 hb_font_get_glyph_from_name_nil (hb_font_t *font HB_UNUSED,
326 void *font_data HB_UNUSED,
327 const char *name, int len, /* -1 means nul-terminated */
328 hb_codepoint_t *glyph,
329 void *user_data HB_UNUSED)
330 {
331 *glyph = 0;
332 return false;
333 }
334 static hb_bool_t
335 hb_font_get_glyph_from_name_parent (hb_font_t *font,
336 void *font_data HB_UNUSED,
337 const char *name, int len, /* -1 means nul-terminated */
338 hb_codepoint_t *glyph,
339 void *user_data HB_UNUSED)
340 {
341 return font->parent->get_glyph_from_name (name, len, glyph);
342 }
343
344 static const hb_font_funcs_t _hb_font_funcs_nil = {
345 HB_OBJECT_HEADER_STATIC,
346
347 true, /* immutable */
348
349 {
350 #define HB_FONT_FUNC_IMPLEMENT(name) nullptr,
351 HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
352 #undef HB_FONT_FUNC_IMPLEMENT
353 },
354 {
355 #define HB_FONT_FUNC_IMPLEMENT(name) nullptr,
356 HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
357 #undef HB_FONT_FUNC_IMPLEMENT
358 },
359 {
360 {
361 #define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_nil,
362 HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
363 #undef HB_FONT_FUNC_IMPLEMENT
364 }
365 }
366 };
367 static const hb_font_funcs_t _hb_font_funcs_parent = {
368 HB_OBJECT_HEADER_STATIC,
369
370 true, /* immutable */
371
372 {
373 #define HB_FONT_FUNC_IMPLEMENT(name) nullptr,
374 HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
375 #undef HB_FONT_FUNC_IMPLEMENT
376 },
377 {
378 #define HB_FONT_FUNC_IMPLEMENT(name) nullptr,
379 HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
380 #undef HB_FONT_FUNC_IMPLEMENT
381 },
382 {
383 {
384 #define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_parent,
385 HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
386 #undef HB_FONT_FUNC_IMPLEMENT
387 }
388 }
389 };
390
391
392 /**
393 * hb_font_funcs_create: (Xconstructor)
394 *
395 *
396 *
397 * Return value: (transfer full):
398 *
399 * Since: 0.9.2
400 **/
401 hb_font_funcs_t *
402 hb_font_funcs_create (void)
403 {
404 hb_font_funcs_t *ffuncs;
405
406 if (!(ffuncs = hb_object_create<hb_font_funcs_t> ()))
407 return hb_font_funcs_get_empty ();
408
409 ffuncs->get = _hb_font_funcs_parent.get;
410
411 return ffuncs;
412 }
413
414 /**
415 * hb_font_funcs_get_empty:
416 *
417 *
418 *
419 * Return value: (transfer full):
420 *
421 * Since: 0.9.2
422 **/
423 hb_font_funcs_t *
424 hb_font_funcs_get_empty (void)
425 {
426 return const_cast<hb_font_funcs_t *> (&_hb_font_funcs_parent);
427 }
428
429 /**
430 * hb_font_funcs_reference: (skip)
431 * @ffuncs: font functions.
432 *
433 *
434 *
435 * Return value:
436 *
437 * Since: 0.9.2
438 **/
439 hb_font_funcs_t *
440 hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
441 {
442 return hb_object_reference (ffuncs);
443 }
444
445 /**
446 * hb_font_funcs_destroy: (skip)
447 * @ffuncs: font functions.
448 *
449 *
450 *
451 * Since: 0.9.2
452 **/
453 void
454 hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
455 {
456 if (!hb_object_destroy (ffuncs)) return;
457
458 #define HB_FONT_FUNC_IMPLEMENT(name) if (ffuncs->destroy.name) \
459 ffuncs->destroy.name (ffuncs->user_data.name);
460 HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
461 #undef HB_FONT_FUNC_IMPLEMENT
462
463 free (ffuncs);
464 }
465
466 /**
467 * hb_font_funcs_set_user_data: (skip)
468 * @ffuncs: font functions.
469 * @key:
470 * @data:
471 * @destroy:
472 * @replace:
473 *
474 *
475 *
476 * Return value:
477 *
478 * Since: 0.9.2
479 **/
480 hb_bool_t
481 hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs,
482 hb_user_data_key_t *key,
483 void * data,
484 hb_destroy_func_t destroy,
485 hb_bool_t replace)
486 {
487 return hb_object_set_user_data (ffuncs, key, data, destroy, replace);
488 }
489
490 /**
491 * hb_font_funcs_get_user_data: (skip)
492 * @ffuncs: font functions.
493 * @key:
494 *
495 *
496 *
497 * Return value: (transfer none):
498 *
499 * Since: 0.9.2
500 **/
501 void *
502 hb_font_funcs_get_user_data (hb_font_funcs_t *ffuncs,
503 hb_user_data_key_t *key)
504 {
505 return hb_object_get_user_data (ffuncs, key);
506 }
507
508
509 /**
510 * hb_font_funcs_make_immutable:
511 * @ffuncs: font functions.
512 *
513 *
514 *
515 * Since: 0.9.2
516 **/
517 void
518 hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
519 {
520 if (unlikely (hb_object_is_inert (ffuncs)))
521 return;
522
523 ffuncs->immutable = true;
524 }
525
526 /**
527 * hb_font_funcs_is_immutable:
528 * @ffuncs: font functions.
529 *
530 *
531 *
532 * Return value:
533 *
534 * Since: 0.9.2
535 **/
536 hb_bool_t
537 hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs)
538 {
539 return ffuncs->immutable;
540 }
541
542
543 #define HB_FONT_FUNC_IMPLEMENT(name) \
544 \
545 void \
546 hb_font_funcs_set_##name##_func (hb_font_funcs_t *ffuncs, \
547 hb_font_get_##name##_func_t func, \
548 void *user_data, \
549 hb_destroy_func_t destroy) \
550 { \
551 if (ffuncs->immutable) { \
552 if (destroy) \
553 destroy (user_data); \
554 return; \
555 } \
556 \
557 if (ffuncs->destroy.name) \
558 ffuncs->destroy.name (ffuncs->user_data.name); \
559 \
560 if (func) { \
561 ffuncs->get.f.name = func; \
562 ffuncs->user_data.name = user_data; \
563 ffuncs->destroy.name = destroy; \
564 } else { \
565 ffuncs->get.f.name = hb_font_get_##name##_parent; \
566 ffuncs->user_data.name = nullptr; \
567 ffuncs->destroy.name = nullptr; \
568 } \
569 }
570
571 HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
572 #undef HB_FONT_FUNC_IMPLEMENT
573
574 bool
575 hb_font_t::has_func (unsigned int i)
576 {
577 if (parent && parent != hb_font_get_empty () && parent->has_func (i))
578 return true;
579 return this->klass->get.array[i] != _hb_font_funcs_parent.get.array[i];
580 }
581
582 /* Public getters */
583
584 /**
585 * hb_font_get_h_extents:
586 * @font: a font.
587 * @extents: (out):
588 *
589 *
590 *
591 * Return value:
592 *
593 * Since: 1.1.3
594 **/
595 hb_bool_t
596 hb_font_get_h_extents (hb_font_t *font,
597 hb_font_extents_t *extents)
598 {
599 return font->get_font_h_extents (extents);
600 }
601
602 /**
603 * hb_font_get_v_extents:
604 * @font: a font.
605 * @extents: (out):
606 *
607 *
608 *
609 * Return value:
610 *
611 * Since: 1.1.3
612 **/
613 hb_bool_t
614 hb_font_get_v_extents (hb_font_t *font,
615 hb_font_extents_t *extents)
616 {
617 return font->get_font_v_extents (extents);
618 }
619
620 /**
621 * hb_font_get_glyph:
622 * @font: a font.
623 * @unicode:
624 * @variation_selector:
625 * @glyph: (out):
626 *
627 *
628 *
629 * Return value:
630 *
631 * Since: 0.9.2
632 **/
633 hb_bool_t
634 hb_font_get_glyph (hb_font_t *font,
635 hb_codepoint_t unicode, hb_codepoint_t variation_selector,
636 hb_codepoint_t *glyph)
637 {
638 if (unlikely (variation_selector))
639 return font->get_variation_glyph (unicode, variation_selector, glyph);
640 return font->get_nominal_glyph (unicode, glyph);
641 }
642
643 /**
644 * hb_font_get_nominal_glyph:
645 * @font: a font.
646 * @unicode:
647 * @glyph: (out):
648 *
649 *
650 *
651 * Return value:
652 *
653 * Since: 1.2.3
654 **/
655 hb_bool_t
656 hb_font_get_nominal_glyph (hb_font_t *font,
657 hb_codepoint_t unicode,
658 hb_codepoint_t *glyph)
659 {
660 return font->get_nominal_glyph (unicode, glyph);
661 }
662
663 /**
664 * hb_font_get_variation_glyph:
665 * @font: a font.
666 * @unicode:
667 * @variation_selector:
668 * @glyph: (out):
669 *
670 *
671 *
672 * Return value:
673 *
674 * Since: 1.2.3
675 **/
676 hb_bool_t
677 hb_font_get_variation_glyph (hb_font_t *font,
678 hb_codepoint_t unicode, hb_codepoint_t variation_selector,
679 hb_codepoint_t *glyph)
680 {
681 return font->get_variation_glyph (unicode, variation_selector, glyph);
682 }
683
684 /**
685 * hb_font_get_glyph_h_advance:
686 * @font: a font.
687 * @glyph:
688 *
689 *
690 *
691 * Return value:
692 *
693 * Since: 0.9.2
694 **/
695 hb_position_t
696 hb_font_get_glyph_h_advance (hb_font_t *font,
697 hb_codepoint_t glyph)
698 {
699 return font->get_glyph_h_advance (glyph);
700 }
701
702 /**
703 * hb_font_get_glyph_v_advance:
704 * @font: a font.
705 * @glyph:
706 *
707 *
708 *
709 * Return value:
710 *
711 * Since: 0.9.2
712 **/
713 hb_position_t
714 hb_font_get_glyph_v_advance (hb_font_t *font,
715 hb_codepoint_t glyph)
716 {
717 return font->get_glyph_v_advance (glyph);
718 }
719
720 /**
721 * hb_font_get_glyph_h_origin:
722 * @font: a font.
723 * @glyph:
724 * @x: (out):
725 * @y: (out):
726 *
727 *
728 *
729 * Return value:
730 *
731 * Since: 0.9.2
732 **/
733 hb_bool_t
734 hb_font_get_glyph_h_origin (hb_font_t *font,
735 hb_codepoint_t glyph,
736 hb_position_t *x, hb_position_t *y)
737 {
738 return font->get_glyph_h_origin (glyph, x, y);
739 }
740
741 /**
742 * hb_font_get_glyph_v_origin:
743 * @font: a font.
744 * @glyph:
745 * @x: (out):
746 * @y: (out):
747 *
748 *
749 *
750 * Return value:
751 *
752 * Since: 0.9.2
753 **/
754 hb_bool_t
755 hb_font_get_glyph_v_origin (hb_font_t *font,
756 hb_codepoint_t glyph,
757 hb_position_t *x, hb_position_t *y)
758 {
759 return font->get_glyph_v_origin (glyph, x, y);
760 }
761
762 /**
763 * hb_font_get_glyph_h_kerning:
764 * @font: a font.
765 * @left_glyph:
766 * @right_glyph:
767 *
768 *
769 *
770 * Return value:
771 *
772 * Since: 0.9.2
773 **/
774 hb_position_t
775 hb_font_get_glyph_h_kerning (hb_font_t *font,
776 hb_codepoint_t left_glyph, hb_codepoint_t right_glyph)
777 {
778 return font->get_glyph_h_kerning (left_glyph, right_glyph);
779 }
780
781 /**
782 * hb_font_get_glyph_v_kerning:
783 * @font: a font.
784 * @top_glyph:
785 * @bottom_glyph:
786 *
787 *
788 *
789 * Return value:
790 *
791 * Since: 0.9.2
792 **/
793 hb_position_t
794 hb_font_get_glyph_v_kerning (hb_font_t *font,
795 hb_codepoint_t top_glyph, hb_codepoint_t bottom_glyph)
796 {
797 return font->get_glyph_v_kerning (top_glyph, bottom_glyph);
798 }
799
800 /**
801 * hb_font_get_glyph_extents:
802 * @font: a font.
803 * @glyph:
804 * @extents: (out):
805 *
806 *
807 *
808 * Return value:
809 *
810 * Since: 0.9.2
811 **/
812 hb_bool_t
813 hb_font_get_glyph_extents (hb_font_t *font,
814 hb_codepoint_t glyph,
815 hb_glyph_extents_t *extents)
816 {
817 return font->get_glyph_extents (glyph, extents);
818 }
819
820 /**
821 * hb_font_get_glyph_contour_point:
822 * @font: a font.
823 * @glyph:
824 * @point_index:
825 * @x: (out):
826 * @y: (out):
827 *
828 *
829 *
830 * Return value:
831 *
832 * Since: 0.9.2
833 **/
834 hb_bool_t
835 hb_font_get_glyph_contour_point (hb_font_t *font,
836 hb_codepoint_t glyph, unsigned int point_index,
837 hb_position_t *x, hb_position_t *y)
838 {
839 return font->get_glyph_contour_point (glyph, point_index, x, y);
840 }
841
842 /**
843 * hb_font_get_glyph_name:
844 * @font: a font.
845 * @glyph:
846 * @name: (array length=size):
847 * @size:
848 *
849 *
850 *
851 * Return value:
852 *
853 * Since: 0.9.2
854 **/
855 hb_bool_t
856 hb_font_get_glyph_name (hb_font_t *font,
857 hb_codepoint_t glyph,
858 char *name, unsigned int size)
859 {
860 return font->get_glyph_name (glyph, name, size);
861 }
862
863 /**
864 * hb_font_get_glyph_from_name:
865 * @font: a font.
866 * @name: (array length=len):
867 * @len:
868 * @glyph: (out):
869 *
870 *
871 *
872 * Return value:
873 *
874 * Since: 0.9.2
875 **/
876 hb_bool_t
877 hb_font_get_glyph_from_name (hb_font_t *font,
878 const char *name, int len, /* -1 means nul-terminated */
879 hb_codepoint_t *glyph)
880 {
881 return font->get_glyph_from_name (name, len, glyph);
882 }
883
884
885 /* A bit higher-level, and with fallback */
886
887 /**
888 * hb_font_get_extents_for_direction:
889 * @font: a font.
890 * @direction:
891 * @extents:
892 *
893 *
894 *
895 * Since: 1.1.3
896 **/
897 void
898 hb_font_get_extents_for_direction (hb_font_t *font,
899 hb_direction_t direction,
900 hb_font_extents_t *extents)
901 {
902 return font->get_extents_for_direction (direction, extents);
903 }
904 /**
905 * hb_font_get_glyph_advance_for_direction:
906 * @font: a font.
907 * @glyph:
908 * @direction:
909 * @x: (out):
910 * @y: (out):
911 *
912 *
913 *
914 * Since: 0.9.2
915 **/
916 void
917 hb_font_get_glyph_advance_for_direction (hb_font_t *font,
918 hb_codepoint_t glyph,
919 hb_direction_t direction,
920 hb_position_t *x, hb_position_t *y)
921 {
922 return font->get_glyph_advance_for_direction (glyph, direction, x, y);
923 }
924
925 /**
926 * hb_font_get_glyph_origin_for_direction:
927 * @font: a font.
928 * @glyph:
929 * @direction:
930 * @x: (out):
931 * @y: (out):
932 *
933 *
934 *
935 * Since: 0.9.2
936 **/
937 void
938 hb_font_get_glyph_origin_for_direction (hb_font_t *font,
939 hb_codepoint_t glyph,
940 hb_direction_t direction,
941 hb_position_t *x, hb_position_t *y)
942 {
943 return font->get_glyph_origin_for_direction (glyph, direction, x, y);
944 }
945
946 /**
947 * hb_font_add_glyph_origin_for_direction:
948 * @font: a font.
949 * @glyph:
950 * @direction:
951 * @x: (out):
952 * @y: (out):
953 *
954 *
955 *
956 * Since: 0.9.2
957 **/
958 void
959 hb_font_add_glyph_origin_for_direction (hb_font_t *font,
960 hb_codepoint_t glyph,
961 hb_direction_t direction,
962 hb_position_t *x, hb_position_t *y)
963 {
964 return font->add_glyph_origin_for_direction (glyph, direction, x, y);
965 }
966
967 /**
968 * hb_font_subtract_glyph_origin_for_direction:
969 * @font: a font.
970 * @glyph:
971 * @direction:
972 * @x: (out):
973 * @y: (out):
974 *
975 *
976 *
977 * Since: 0.9.2
978 **/
979 void
980 hb_font_subtract_glyph_origin_for_direction (hb_font_t *font,
981 hb_codepoint_t glyph,
982 hb_direction_t direction,
983 hb_position_t *x, hb_position_t *y)
984 {
985 return font->subtract_glyph_origin_for_direction (glyph, direction, x, y);
986 }
987
988 /**
989 * hb_font_get_glyph_kerning_for_direction:
990 * @font: a font.
991 * @first_glyph:
992 * @second_glyph:
993 * @direction:
994 * @x: (out):
995 * @y: (out):
996 *
997 *
998 *
999 * Since: 0.9.2
1000 **/
1001 void
1002 hb_font_get_glyph_kerning_for_direction (hb_font_t *font,
1003 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
1004 hb_direction_t direction,
1005 hb_position_t *x, hb_position_t *y)
1006 {
1007 return font->get_glyph_kerning_for_direction (first_glyph, second_glyph, direction, x, y);
1008 }
1009
1010 /**
1011 * hb_font_get_glyph_extents_for_origin:
1012 * @font: a font.
1013 * @glyph:
1014 * @direction:
1015 * @extents: (out):
1016 *
1017 *
1018 *
1019 * Return value:
1020 *
1021 * Since: 0.9.2
1022 **/
1023 hb_bool_t
1024 hb_font_get_glyph_extents_for_origin (hb_font_t *font,
1025 hb_codepoint_t glyph,
1026 hb_direction_t direction,
1027 hb_glyph_extents_t *extents)
1028 {
1029 return font->get_glyph_extents_for_origin (glyph, direction, extents);
1030 }
1031
1032 /**
1033 * hb_font_get_glyph_contour_point_for_origin:
1034 * @font: a font.
1035 * @glyph:
1036 * @point_index:
1037 * @direction:
1038 * @x: (out):
1039 * @y: (out):
1040 *
1041 *
1042 *
1043 * Return value:
1044 *
1045 * Since: 0.9.2
1046 **/
1047 hb_bool_t
1048 hb_font_get_glyph_contour_point_for_origin (hb_font_t *font,
1049 hb_codepoint_t glyph, unsigned int point_index,
1050 hb_direction_t direction,
1051 hb_position_t *x, hb_position_t *y)
1052 {
1053 return font->get_glyph_contour_point_for_origin (glyph, point_index, direction, x, y);
1054 }
1055
1056 /* Generates gidDDD if glyph has no name. */
1057 /**
1058 * hb_font_glyph_to_string:
1059 * @font: a font.
1060 * @glyph:
1061 * @s: (array length=size):
1062 * @size:
1063 *
1064 *
1065 *
1066 * Since: 0.9.2
1067 **/
1068 void
1069 hb_font_glyph_to_string (hb_font_t *font,
1070 hb_codepoint_t glyph,
1071 char *s, unsigned int size)
1072 {
1073 font->glyph_to_string (glyph, s, size);
1074 }
1075
1076 /* Parses gidDDD and uniUUUU strings automatically. */
1077 /**
1078 * hb_font_glyph_from_string:
1079 * @font: a font.
1080 * @s: (array length=len) (element-type uint8_t):
1081 * @len:
1082 * @glyph: (out):
1083 *
1084 *
1085 *
1086 * Return value:
1087 *
1088 * Since: 0.9.2
1089 **/
1090 hb_bool_t
1091 hb_font_glyph_from_string (hb_font_t *font,
1092 const char *s, int len, /* -1 means nul-terminated */
1093 hb_codepoint_t *glyph)
1094 {
1095 return font->glyph_from_string (s, len, glyph);
1096 }
1097
1098
1099 /*
1100 * hb_font_t
1101 */
1102
1103 /**
1104 * hb_font_create: (Xconstructor)
1105 * @face: a face.
1106 *
1107 *
1108 *
1109 * Return value: (transfer full):
1110 *
1111 * Since: 0.9.2
1112 **/
1113 hb_font_t *
1114 hb_font_create (hb_face_t *face)
1115 {
1116 hb_font_t *font;
1117
1118 if (unlikely (!face))
1119 face = hb_face_get_empty ();
1120 if (!(font = hb_object_create<hb_font_t> ()))
1121 return hb_font_get_empty ();
1122
1123 hb_face_make_immutable (face);
1124 font->parent = hb_font_get_empty ();
1125 font->face = hb_face_reference (face);
1126 font->klass = hb_font_funcs_get_empty ();
1127
1128 font->x_scale = font->y_scale = hb_face_get_upem (face);
1129
1130 return font;
1131 }
1132
1133 /**
1134 * hb_font_create_sub_font:
1135 * @parent: parent font.
1136 *
1137 *
1138 *
1139 * Return value: (transfer full):
1140 *
1141 * Since: 0.9.2
1142 **/
1143 hb_font_t *
1144 hb_font_create_sub_font (hb_font_t *parent)
1145 {
1146 if (unlikely (!parent))
1147 parent = hb_font_get_empty ();
1148
1149 hb_font_t *font = hb_font_create (parent->face);
1150
1151 if (unlikely (hb_object_is_inert (font)))
1152 return font;
1153
1154 font->parent = hb_font_reference (parent);
1155
1156 font->x_scale = parent->x_scale;
1157 font->y_scale = parent->y_scale;
1158 font->x_ppem = parent->x_ppem;
1159 font->y_ppem = parent->y_ppem;
1160 font->ptem = parent->ptem;
1161
1162 font->num_coords = parent->num_coords;
1163 if (!font->num_coords)
1164 font->coords = nullptr;
1165 else
1166 {
1167 unsigned int size = parent->num_coords * sizeof (parent->coords[0]);
1168 font->coords = (int *) malloc (size);
1169 if (unlikely (!font->coords))
1170 font->num_coords = 0;
1171 else
1172 memcpy (font->coords, parent->coords, size);
1173 }
1174
1175 return font;
1176 }
1177
1178 /**
1179 * hb_font_get_empty:
1180 *
1181 *
1182 *
1183 * Return value: (transfer full)
1184 *
1185 * Since: 0.9.2
1186 **/
1187 hb_font_t *
1188 hb_font_get_empty (void)
1189 {
1190 static const hb_font_t _hb_font_nil = {
1191 HB_OBJECT_HEADER_STATIC,
1192
1193 true, /* immutable */
1194
1195 nullptr, /* parent */
1196 const_cast<hb_face_t *> (&_hb_face_nil),
1197
1198 1000, /* x_scale */
1199 1000, /* y_scale */
1200
1201 0, /* x_ppem */
1202 0, /* y_ppem */
1203 0, /* ptem */
1204
1205 0, /* num_coords */
1206 nullptr, /* coords */
1207
1208 const_cast<hb_font_funcs_t *> (&_hb_font_funcs_nil), /* klass */
1209 nullptr, /* user_data */
1210 nullptr, /* destroy */
1211
1212 {
1213 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
1214 #include "hb-shaper-list.hh"
1215 #undef HB_SHAPER_IMPLEMENT
1216 }
1217 };
1218
1219 return const_cast<hb_font_t *> (&_hb_font_nil);
1220 }
1221
1222 /**
1223 * hb_font_reference: (skip)
1224 * @font: a font.
1225 *
1226 *
1227 *
1228 * Return value: (transfer full):
1229 *
1230 * Since: 0.9.2
1231 **/
1232 hb_font_t *
1233 hb_font_reference (hb_font_t *font)
1234 {
1235 return hb_object_reference (font);
1236 }
1237
1238 /**
1239 * hb_font_destroy: (skip)
1240 * @font: a font.
1241 *
1242 *
1243 *
1244 * Since: 0.9.2
1245 **/
1246 void
1247 hb_font_destroy (hb_font_t *font)
1248 {
1249 if (!hb_object_destroy (font)) return;
1250
1251 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, font);
1252 #include "hb-shaper-list.hh"
1253 #undef HB_SHAPER_IMPLEMENT
1254
1255 if (font->destroy)
1256 font->destroy (font->user_data);
1257
1258 hb_font_destroy (font->parent);
1259 hb_face_destroy (font->face);
1260 hb_font_funcs_destroy (font->klass);
1261
1262 free (font->coords);
1263
1264 free (font);
1265 }
1266
1267 /**
1268 * hb_font_set_user_data: (skip)
1269 * @font: a font.
1270 * @key:
1271 * @data:
1272 * @destroy:
1273 * @replace:
1274 *
1275 *
1276 *
1277 * Return value:
1278 *
1279 * Since: 0.9.2
1280 **/
1281 hb_bool_t
1282 hb_font_set_user_data (hb_font_t *font,
1283 hb_user_data_key_t *key,
1284 void * data,
1285 hb_destroy_func_t destroy,
1286 hb_bool_t replace)
1287 {
1288 return hb_object_set_user_data (font, key, data, destroy, replace);
1289 }
1290
1291 /**
1292 * hb_font_get_user_data: (skip)
1293 * @font: a font.
1294 * @key:
1295 *
1296 *
1297 *
1298 * Return value: (transfer none):
1299 *
1300 * Since: 0.9.2
1301 **/
1302 void *
1303 hb_font_get_user_data (hb_font_t *font,
1304 hb_user_data_key_t *key)
1305 {
1306 return hb_object_get_user_data (font, key);
1307 }
1308
1309 /**
1310 * hb_font_make_immutable:
1311 * @font: a font.
1312 *
1313 *
1314 *
1315 * Since: 0.9.2
1316 **/
1317 void
1318 hb_font_make_immutable (hb_font_t *font)
1319 {
1320 if (unlikely (hb_object_is_inert (font)))
1321 return;
1322
1323 if (font->parent)
1324 hb_font_make_immutable (font->parent);
1325
1326 font->immutable = true;
1327 }
1328
1329 /**
1330 * hb_font_is_immutable:
1331 * @font: a font.
1332 *
1333 *
1334 *
1335 * Return value:
1336 *
1337 * Since: 0.9.2
1338 **/
1339 hb_bool_t
1340 hb_font_is_immutable (hb_font_t *font)
1341 {
1342 return font->immutable;
1343 }
1344
1345 /**
1346 * hb_font_set_parent:
1347 * @font: a font.
1348 * @parent: new parent.
1349 *
1350 * Sets parent font of @font.
1351 *
1352 * Since: 1.0.5
1353 **/
1354 void
1355 hb_font_set_parent (hb_font_t *font,
1356 hb_font_t *parent)
1357 {
1358 if (font->immutable)
1359 return;
1360
1361 if (!parent)
1362 parent = hb_font_get_empty ();
1363
1364 hb_font_t *old = font->parent;
1365
1366 font->parent = hb_font_reference (parent);
1367
1368 hb_font_destroy (old);
1369 }
1370
1371 /**
1372 * hb_font_get_parent:
1373 * @font: a font.
1374 *
1375 *
1376 *
1377 * Return value: (transfer none):
1378 *
1379 * Since: 0.9.2
1380 **/
1381 hb_font_t *
1382 hb_font_get_parent (hb_font_t *font)
1383 {
1384 return font->parent;
1385 }
1386
1387 /**
1388 * hb_font_set_face:
1389 * @font: a font.
1390 * @face: new face.
1391 *
1392 * Sets font-face of @font.
1393 *
1394 * Since: 1.4.3
1395 **/
1396 void
1397 hb_font_set_face (hb_font_t *font,
1398 hb_face_t *face)
1399 {
1400 if (font->immutable)
1401 return;
1402
1403 if (unlikely (!face))
1404 face = hb_face_get_empty ();
1405
1406 hb_face_t *old = font->face;
1407
1408 font->face = hb_face_reference (face);
1409
1410 hb_face_destroy (old);
1411 }
1412
1413 /**
1414 * hb_font_get_face:
1415 * @font: a font.
1416 *
1417 *
1418 *
1419 * Return value: (transfer none):
1420 *
1421 * Since: 0.9.2
1422 **/
1423 hb_face_t *
1424 hb_font_get_face (hb_font_t *font)
1425 {
1426 return font->face;
1427 }
1428
1429
1430 /**
1431 * hb_font_set_funcs:
1432 * @font: a font.
1433 * @klass: (closure font_data) (destroy destroy) (scope notified):
1434 * @font_data:
1435 * @destroy:
1436 *
1437 *
1438 *
1439 * Since: 0.9.2
1440 **/
1441 void
1442 hb_font_set_funcs (hb_font_t *font,
1443 hb_font_funcs_t *klass,
1444 void *font_data,
1445 hb_destroy_func_t destroy)
1446 {
1447 if (font->immutable) {
1448 if (destroy)
1449 destroy (font_data);
1450 return;
1451 }
1452
1453 if (font->destroy)
1454 font->destroy (font->user_data);
1455
1456 if (!klass)
1457 klass = hb_font_funcs_get_empty ();
1458
1459 hb_font_funcs_reference (klass);
1460 hb_font_funcs_destroy (font->klass);
1461 font->klass = klass;
1462 font->user_data = font_data;
1463 font->destroy = destroy;
1464 }
1465
1466 /**
1467 * hb_font_set_funcs_data:
1468 * @font: a font.
1469 * @font_data: (destroy destroy) (scope notified):
1470 * @destroy:
1471 *
1472 *
1473 *
1474 * Since: 0.9.2
1475 **/
1476 void
1477 hb_font_set_funcs_data (hb_font_t *font,
1478 void *font_data,
1479 hb_destroy_func_t destroy)
1480 {
1481 /* Destroy user_data? */
1482 if (font->immutable) {
1483 if (destroy)
1484 destroy (font_data);
1485 return;
1486 }
1487
1488 if (font->destroy)
1489 font->destroy (font->user_data);
1490
1491 font->user_data = font_data;
1492 font->destroy = destroy;
1493 }
1494
1495
1496 /**
1497 * hb_font_set_scale:
1498 * @font: a font.
1499 * @x_scale:
1500 * @y_scale:
1501 *
1502 *
1503 *
1504 * Since: 0.9.2
1505 **/
1506 void
1507 hb_font_set_scale (hb_font_t *font,
1508 int x_scale,
1509 int y_scale)
1510 {
1511 if (font->immutable)
1512 return;
1513
1514 font->x_scale = x_scale;
1515 font->y_scale = y_scale;
1516 }
1517
1518 /**
1519 * hb_font_get_scale:
1520 * @font: a font.
1521 * @x_scale: (out):
1522 * @y_scale: (out):
1523 *
1524 *
1525 *
1526 * Since: 0.9.2
1527 **/
1528 void
1529 hb_font_get_scale (hb_font_t *font,
1530 int *x_scale,
1531 int *y_scale)
1532 {
1533 if (x_scale) *x_scale = font->x_scale;
1534 if (y_scale) *y_scale = font->y_scale;
1535 }
1536
1537 /**
1538 * hb_font_set_ppem:
1539 * @font: a font.
1540 * @x_ppem:
1541 * @y_ppem:
1542 *
1543 *
1544 *
1545 * Since: 0.9.2
1546 **/
1547 void
1548 hb_font_set_ppem (hb_font_t *font,
1549 unsigned int x_ppem,
1550 unsigned int y_ppem)
1551 {
1552 if (font->immutable)
1553 return;
1554
1555 font->x_ppem = x_ppem;
1556 font->y_ppem = y_ppem;
1557 }
1558
1559 /**
1560 * hb_font_get_ppem:
1561 * @font: a font.
1562 * @x_ppem: (out):
1563 * @y_ppem: (out):
1564 *
1565 *
1566 *
1567 * Since: 0.9.2
1568 **/
1569 void
1570 hb_font_get_ppem (hb_font_t *font,
1571 unsigned int *x_ppem,
1572 unsigned int *y_ppem)
1573 {
1574 if (x_ppem) *x_ppem = font->x_ppem;
1575 if (y_ppem) *y_ppem = font->y_ppem;
1576 }
1577
1578 /**
1579 * hb_font_set_ptem:
1580 * @font: a font.
1581 * @ptem:
1582 *
1583 * Sets "point size" of the font.
1584 *
1585 * Since: 1.6.0
1586 **/
1587 void
1588 hb_font_set_ptem (hb_font_t *font, float ptem)
1589 {
1590 if (font->immutable)
1591 return;
1592
1593 font->ptem = ptem;
1594 }
1595
1596 /**
1597 * hb_font_get_ptem:
1598 * @font: a font.
1599 *
1600 * Gets the "point size" of the font. A value of 0 means unset.
1601 *
1602 * Return value: Point size.
1603 *
1604 * Since: 0.9.2
1605 **/
1606 float
1607 hb_font_get_ptem (hb_font_t *font)
1608 {
1609 return font->ptem;
1610 }
1611
1612 /*
1613 * Variations
1614 */
1615
1616 static void
1617 _hb_font_adopt_var_coords_normalized (hb_font_t *font,
1618 int *coords, /* 2.14 normalized */
1619 unsigned int coords_length)
1620 {
1621 free (font->coords);
1622
1623 font->coords = coords;
1624 font->num_coords = coords_length;
1625 }
1626
1627 /**
1628 * hb_font_set_variations:
1629 *
1630 * Since: 1.4.2
1631 */
1632 void
1633 hb_font_set_variations (hb_font_t *font,
1634 const hb_variation_t *variations,
1635 unsigned int variations_length)
1636 {
1637 if (font->immutable)
1638 return;
1639
1640 if (!variations_length)
1641 {
1642 hb_font_set_var_coords_normalized (font, nullptr, 0);
1643 return;
1644 }
1645
1646 unsigned int coords_length = hb_ot_var_get_axis_count (font->face);
1647
1648 int *normalized = coords_length ? (int *) calloc (coords_length, sizeof (int)) : nullptr;
1649 if (unlikely (coords_length && !normalized))
1650 return;
1651
1652 hb_ot_var_normalize_variations (font->face,
1653 variations, variations_length,
1654 normalized, coords_length);
1655 _hb_font_adopt_var_coords_normalized (font, normalized, coords_length);
1656 }
1657
1658 /**
1659 * hb_font_set_var_coords_design:
1660 *
1661 * Since: 1.4.2
1662 */
1663 void
1664 hb_font_set_var_coords_design (hb_font_t *font,
1665 const float *coords,
1666 unsigned int coords_length)
1667 {
1668 if (font->immutable)
1669 return;
1670
1671 int *normalized = coords_length ? (int *) calloc (coords_length, sizeof (int)) : nullptr;
1672 if (unlikely (coords_length && !normalized))
1673 return;
1674
1675 hb_ot_var_normalize_coords (font->face, coords_length, coords, normalized);
1676 _hb_font_adopt_var_coords_normalized (font, normalized, coords_length);
1677 }
1678
1679 /**
1680 * hb_font_set_var_coords_normalized:
1681 *
1682 * Since: 1.4.2
1683 */
1684 void
1685 hb_font_set_var_coords_normalized (hb_font_t *font,
1686 const int *coords, /* 2.14 normalized */
1687 unsigned int coords_length)
1688 {
1689 if (font->immutable)
1690 return;
1691
1692 int *copy = coords_length ? (int *) calloc (coords_length, sizeof (coords[0])) : nullptr;
1693 if (unlikely (coords_length && !copy))
1694 return;
1695
1696 if (coords_length)
1697 memcpy (copy, coords, coords_length * sizeof (coords[0]));
1698
1699 _hb_font_adopt_var_coords_normalized (font, copy, coords_length);
1700 }
1701
1702 /**
1703 * hb_font_get_var_coords_normalized:
1704 *
1705 * Return value is valid as long as variation coordinates of the font
1706 * are not modified.
1707 *
1708 * Since: 1.4.2
1709 */
1710 const int *
1711 hb_font_get_var_coords_normalized (hb_font_t *font,
1712 unsigned int *length)
1713 {
1714 if (length)
1715 *length = font->num_coords;
1716
1717 return font->coords;
1718 }
1719
1720
1721 #ifndef HB_DISABLE_DEPRECATED
1722
1723 /*
1724 * Deprecated get_glyph_func():
1725 */
1726
1727 struct hb_trampoline_closure_t
1728 {
1729 void *user_data;
1730 hb_destroy_func_t destroy;
1731 unsigned int ref_count;
1732 };
1733
1734 template <typename FuncType>
1735 struct hb_trampoline_t
1736 {
1737 hb_trampoline_closure_t closure; /* Must be first. */
1738 FuncType func;
1739 };
1740
1741 template <typename FuncType>
1742 static hb_trampoline_t<FuncType> *
1743 trampoline_create (FuncType func,
1744 void *user_data,
1745 hb_destroy_func_t destroy)
1746 {
1747 typedef hb_trampoline_t<FuncType> trampoline_t;
1748
1749 trampoline_t *trampoline = (trampoline_t *) calloc (1, sizeof (trampoline_t));
1750
1751 if (unlikely (!trampoline))
1752 return nullptr;
1753
1754 trampoline->closure.user_data = user_data;
1755 trampoline->closure.destroy = destroy;
1756 trampoline->closure.ref_count = 1;
1757 trampoline->func = func;
1758
1759 return trampoline;
1760 }
1761
1762 static void
1763 trampoline_reference (hb_trampoline_closure_t *closure)
1764 {
1765 closure->ref_count++;
1766 }
1767
1768 static void
1769 trampoline_destroy (void *user_data)
1770 {
1771 hb_trampoline_closure_t *closure = (hb_trampoline_closure_t *) user_data;
1772
1773 if (--closure->ref_count)
1774 return;
1775
1776 if (closure->destroy)
1777 closure->destroy (closure->user_data);
1778 free (closure);
1779 }
1780
1781 typedef hb_trampoline_t<hb_font_get_glyph_func_t> hb_font_get_glyph_trampoline_t;
1782
1783 static hb_bool_t
1784 hb_font_get_nominal_glyph_trampoline (hb_font_t *font,
1785 void *font_data,
1786 hb_codepoint_t unicode,
1787 hb_codepoint_t *glyph,
1788 void *user_data)
1789 {
1790 hb_font_get_glyph_trampoline_t *trampoline = (hb_font_get_glyph_trampoline_t *) user_data;
1791 return trampoline->func (font, font_data, unicode, 0, glyph, trampoline->closure.user_data);
1792 }
1793
1794 static hb_bool_t
1795 hb_font_get_variation_glyph_trampoline (hb_font_t *font,
1796 void *font_data,
1797 hb_codepoint_t unicode,
1798 hb_codepoint_t variation_selector,
1799 hb_codepoint_t *glyph,
1800 void *user_data)
1801 {
1802 hb_font_get_glyph_trampoline_t *trampoline = (hb_font_get_glyph_trampoline_t *) user_data;
1803 return trampoline->func (font, font_data, unicode, variation_selector, glyph, trampoline->closure.user_data);
1804 }
1805
1806 /**
1807 * hb_font_funcs_set_glyph_func:
1808 * @ffuncs: font functions.
1809 * @func: (closure user_data) (destroy destroy) (scope notified):
1810 * @user_data:
1811 * @destroy:
1812 *
1813 * Deprecated. Use hb_font_funcs_set_nominal_glyph_func() and
1814 * hb_font_funcs_set_variation_glyph_func() instead.
1815 *
1816 * Since: 0.9.2
1817 * Deprecated: 1.2.3
1818 **/
1819 void
1820 hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
1821 hb_font_get_glyph_func_t func,
1822 void *user_data, hb_destroy_func_t destroy)
1823 {
1824 hb_font_get_glyph_trampoline_t *trampoline;
1825
1826 trampoline = trampoline_create (func, user_data, destroy);
1827 if (unlikely (!trampoline))
1828 {
1829 if (destroy)
1830 destroy (user_data);
1831 return;
1832 }
1833
1834 hb_font_funcs_set_nominal_glyph_func (ffuncs,
1835 hb_font_get_nominal_glyph_trampoline,
1836 trampoline,
1837 trampoline_destroy);
1838
1839 trampoline_reference (&trampoline->closure);
1840 hb_font_funcs_set_variation_glyph_func (ffuncs,
1841 hb_font_get_variation_glyph_trampoline,
1842 trampoline,
1843 trampoline_destroy);
1844 }
1845
1846 #endif /* HB_DISABLE_DEPRECATED */