1 /*
2 * Copyright © 2012,2013 Mozilla Foundation.
3 * Copyright © 2012,2013 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 * Mozilla Author(s): Jonathan Kew
26 * Google Author(s): Behdad Esfahbod
27 */
28
29 #define HB_SHAPER coretext
30 #define hb_coretext_shaper_face_data_t CGFont
31 #include "hb-shaper-impl-private.hh"
32
33 #include "hb-coretext.h"
34
35
36 #ifndef HB_DEBUG_CORETEXT
37 #define HB_DEBUG_CORETEXT (HB_DEBUG+0)
38 #endif
39
40
41 static void
42 release_table_data (void *user_data)
43 {
44 CFDataRef cf_data = reinterpret_cast<CFDataRef> (user_data);
45 CFRelease(cf_data);
46 }
47
48 static hb_blob_t *
49 reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
50 {
51 CGFontRef cg_font = reinterpret_cast<CGFontRef> (user_data);
52 CFDataRef cf_data = CGFontCopyTableForTag (cg_font, tag);
53 if (unlikely (!cf_data))
54 return NULL;
55
56 const char *data = reinterpret_cast<const char*> (CFDataGetBytePtr (cf_data));
57 const size_t length = CFDataGetLength (cf_data);
58 if (!data || !length)
59 return NULL;
60
61 return hb_blob_create (data, length, HB_MEMORY_MODE_READONLY,
62 reinterpret_cast<void *> (const_cast<__CFData *> (cf_data)),
63 release_table_data);
64 }
65
66 hb_face_t *
67 hb_coretext_face_create (CGFontRef cg_font)
68 {
69 return hb_face_create_for_tables (reference_table, CGFontRetain (cg_font), (hb_destroy_func_t) CGFontRelease);
70 }
71
72
73 HB_SHAPER_DATA_ENSURE_DECLARE(coretext, face)
74 HB_SHAPER_DATA_ENSURE_DECLARE(coretext, font)
75
76
77 /*
78 * shaper face data
79 */
80
81 static void
82 release_data (void *info, const void *data, size_t size)
83 {
84 assert (hb_blob_get_length ((hb_blob_t *) info) == size &&
85 hb_blob_get_data ((hb_blob_t *) info, NULL) == data);
86
87 hb_blob_destroy ((hb_blob_t *) info);
88 }
89
90 hb_coretext_shaper_face_data_t *
91 _hb_coretext_shaper_face_data_create (hb_face_t *face)
92 {
93 hb_coretext_shaper_face_data_t *data = NULL;
94
95 if (face->destroy == (hb_destroy_func_t) CGFontRelease)
96 {
97 data = CGFontRetain ((CGFontRef) face->user_data);
98 }
99 else
100 {
101 hb_blob_t *blob = hb_face_reference_blob (face);
102 unsigned int blob_length;
103 const char *blob_data = hb_blob_get_data (blob, &blob_length);
104 if (unlikely (!blob_length))
105 DEBUG_MSG (CORETEXT, face, "Face has empty blob");
106
107 CGDataProviderRef provider = CGDataProviderCreateWithData (blob, blob_data, blob_length, &release_data);
108 if (likely (provider))
109 {
110 data = CGFontCreateWithDataProvider (provider);
111 CGDataProviderRelease (provider);
112 }
113 }
114
115 if (unlikely (!data)) {
116 DEBUG_MSG (CORETEXT, face, "Face CGFontCreateWithDataProvider() failed");
117 }
118
119 return data;
120 }
121
122 void
123 _hb_coretext_shaper_face_data_destroy (hb_coretext_shaper_face_data_t *data)
124 {
125 CFRelease (data);
126 }
127
128 /*
129 * Since: 0.9.10
130 */
131 CGFontRef
132 hb_coretext_face_get_cg_font (hb_face_t *face)
133 {
134 if (unlikely (!hb_coretext_shaper_face_data_ensure (face))) return NULL;
135 hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
136 return face_data;
137 }
138
139
140 /*
141 * shaper font data
142 */
143
144 struct hb_coretext_shaper_font_data_t {
145 CTFontRef ct_font;
146 CGFloat x_mult, y_mult; /* From CT space to HB space. */
147 };
148
149 hb_coretext_shaper_font_data_t *
150 _hb_coretext_shaper_font_data_create (hb_font_t *font)
151 {
152 if (unlikely (!hb_coretext_shaper_face_data_ensure (font->face))) return NULL;
153
154 hb_coretext_shaper_font_data_t *data = (hb_coretext_shaper_font_data_t *) calloc (1, sizeof (hb_coretext_shaper_font_data_t));
155 if (unlikely (!data))
156 return NULL;
157
158 hb_face_t *face = font->face;
159 hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
160
161 /* Choose a CoreText font size and calculate multipliers to convert to HarfBuzz space. */
162 /* TODO: use upem instead of 36? */
163 CGFloat font_size = 36.; /* Default... */
164 /* No idea if the following is even a good idea. */
165 if (font->y_ppem)
166 font_size = font->y_ppem;
167
168 if (font_size < 0)
169 font_size = -font_size;
170 data->x_mult = (CGFloat) font->x_scale / font_size;
171 data->y_mult = (CGFloat) font->y_scale / font_size;
172 data->ct_font = CTFontCreateWithGraphicsFont (face_data, font_size, NULL, NULL);
173 if (unlikely (!data->ct_font)) {
174 DEBUG_MSG (CORETEXT, font, "Font CTFontCreateWithGraphicsFont() failed");
175 free (data);
176 return NULL;
177 }
178
179 return data;
180 }
181
182 void
183 _hb_coretext_shaper_font_data_destroy (hb_coretext_shaper_font_data_t *data)
184 {
185 CFRelease (data->ct_font);
186 free (data);
187 }
188
189
190 /*
191 * shaper shape_plan data
192 */
193
194 struct hb_coretext_shaper_shape_plan_data_t {};
195
196 hb_coretext_shaper_shape_plan_data_t *
197 _hb_coretext_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
198 const hb_feature_t *user_features HB_UNUSED,
199 unsigned int num_user_features HB_UNUSED)
200 {
201 return (hb_coretext_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
202 }
203
204 void
205 _hb_coretext_shaper_shape_plan_data_destroy (hb_coretext_shaper_shape_plan_data_t *data HB_UNUSED)
206 {
207 }
208
209 CTFontRef
210 hb_coretext_font_get_ct_font (hb_font_t *font)
211 {
212 if (unlikely (!hb_coretext_shaper_font_data_ensure (font))) return NULL;
213 hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
214 return font_data->ct_font;
215 }
216
217
218 /*
219 * shaper
220 */
221
222 struct feature_record_t {
223 unsigned int feature;
224 unsigned int setting;
225 };
226
227 struct active_feature_t {
228 feature_record_t rec;
229 unsigned int order;
230
231 static int cmp (const active_feature_t *a, const active_feature_t *b) {
232 return a->rec.feature < b->rec.feature ? -1 : a->rec.feature > b->rec.feature ? 1 :
233 a->order < b->order ? -1 : a->order > b->order ? 1 :
234 a->rec.setting < b->rec.setting ? -1 : a->rec.setting > b->rec.setting ? 1 :
235 0;
236 }
237 bool operator== (const active_feature_t *f) {
238 return cmp (this, f) == 0;
239 }
240 };
241
242 struct feature_event_t {
243 unsigned int index;
244 bool start;
245 active_feature_t feature;
246
247 static int cmp (const feature_event_t *a, const feature_event_t *b) {
248 return a->index < b->index ? -1 : a->index > b->index ? 1 :
249 a->start < b->start ? -1 : a->start > b->start ? 1 :
250 active_feature_t::cmp (&a->feature, &b->feature);
251 }
252 };
253
254 struct range_record_t {
255 CTFontRef font;
256 unsigned int index_first; /* == start */
257 unsigned int index_last; /* == end - 1 */
258 };
259
260
261 /* The following enum members are added in OS X 10.8. */
262 #define kAltHalfWidthTextSelector 6
263 #define kAltProportionalTextSelector 5
264 #define kAlternateHorizKanaOffSelector 1
265 #define kAlternateHorizKanaOnSelector 0
266 #define kAlternateKanaType 34
267 #define kAlternateVertKanaOffSelector 3
268 #define kAlternateVertKanaOnSelector 2
269 #define kCaseSensitiveLayoutOffSelector 1
270 #define kCaseSensitiveLayoutOnSelector 0
271 #define kCaseSensitiveLayoutType 33
272 #define kCaseSensitiveSpacingOffSelector 3
273 #define kCaseSensitiveSpacingOnSelector 2
274 #define kContextualAlternatesOffSelector 1
275 #define kContextualAlternatesOnSelector 0
276 #define kContextualAlternatesType 36
277 #define kContextualLigaturesOffSelector 19
278 #define kContextualLigaturesOnSelector 18
279 #define kContextualSwashAlternatesOffSelector 5
280 #define kContextualSwashAlternatesOnSelector 4
281 #define kDefaultLowerCaseSelector 0
282 #define kDefaultUpperCaseSelector 0
283 #define kHistoricalLigaturesOffSelector 21
284 #define kHistoricalLigaturesOnSelector 20
285 #define kHojoCharactersSelector 12
286 #define kJIS2004CharactersSelector 11
287 #define kLowerCasePetiteCapsSelector 2
288 #define kLowerCaseSmallCapsSelector 1
289 #define kLowerCaseType 37
290 #define kMathematicalGreekOffSelector 11
291 #define kMathematicalGreekOnSelector 10
292 #define kNLCCharactersSelector 13
293 #define kQuarterWidthTextSelector 4
294 #define kScientificInferiorsSelector 4
295 #define kStylisticAltEightOffSelector 17
296 #define kStylisticAltEightOnSelector 16
297 #define kStylisticAltEighteenOffSelector 37
298 #define kStylisticAltEighteenOnSelector 36
299 #define kStylisticAltElevenOffSelector 23
300 #define kStylisticAltElevenOnSelector 22
301 #define kStylisticAltFifteenOffSelector 31
302 #define kStylisticAltFifteenOnSelector 30
303 #define kStylisticAltFiveOffSelector 11
304 #define kStylisticAltFiveOnSelector 10
305 #define kStylisticAltFourOffSelector 9
306 #define kStylisticAltFourOnSelector 8
307 #define kStylisticAltFourteenOffSelector 29
308 #define kStylisticAltFourteenOnSelector 28
309 #define kStylisticAltNineOffSelector 19
310 #define kStylisticAltNineOnSelector 18
311 #define kStylisticAltNineteenOffSelector 39
312 #define kStylisticAltNineteenOnSelector 38
313 #define kStylisticAltOneOffSelector 3
314 #define kStylisticAltOneOnSelector 2
315 #define kStylisticAltSevenOffSelector 15
316 #define kStylisticAltSevenOnSelector 14
317 #define kStylisticAltSeventeenOffSelector 35
318 #define kStylisticAltSeventeenOnSelector 34
319 #define kStylisticAltSixOffSelector 13
320 #define kStylisticAltSixOnSelector 12
321 #define kStylisticAltSixteenOffSelector 33
322 #define kStylisticAltSixteenOnSelector 32
323 #define kStylisticAltTenOffSelector 21
324 #define kStylisticAltTenOnSelector 20
325 #define kStylisticAltThirteenOffSelector 27
326 #define kStylisticAltThirteenOnSelector 26
327 #define kStylisticAltThreeOffSelector 7
328 #define kStylisticAltThreeOnSelector 6
329 #define kStylisticAltTwelveOffSelector 25
330 #define kStylisticAltTwelveOnSelector 24
331 #define kStylisticAltTwentyOffSelector 41
332 #define kStylisticAltTwentyOnSelector 40
333 #define kStylisticAltTwoOffSelector 5
334 #define kStylisticAltTwoOnSelector 4
335 #define kStylisticAlternativesType 35
336 #define kSwashAlternatesOffSelector 3
337 #define kSwashAlternatesOnSelector 2
338 #define kThirdWidthTextSelector 3
339 #define kTraditionalNamesCharactersSelector 14
340 #define kUpperCasePetiteCapsSelector 2
341 #define kUpperCaseSmallCapsSelector 1
342 #define kUpperCaseType 38
343
344 /* Table data courtesy of Apple. */
345 static const struct feature_mapping_t {
346 FourCharCode otFeatureTag;
347 uint16_t aatFeatureType;
348 uint16_t selectorToEnable;
349 uint16_t selectorToDisable;
350 } feature_mappings[] = {
351 { 'c2pc', kUpperCaseType, kUpperCasePetiteCapsSelector, kDefaultUpperCaseSelector },
352 { 'c2sc', kUpperCaseType, kUpperCaseSmallCapsSelector, kDefaultUpperCaseSelector },
353 { 'calt', kContextualAlternatesType, kContextualAlternatesOnSelector, kContextualAlternatesOffSelector },
354 { 'case', kCaseSensitiveLayoutType, kCaseSensitiveLayoutOnSelector, kCaseSensitiveLayoutOffSelector },
355 { 'clig', kLigaturesType, kContextualLigaturesOnSelector, kContextualLigaturesOffSelector },
356 { 'cpsp', kCaseSensitiveLayoutType, kCaseSensitiveSpacingOnSelector, kCaseSensitiveSpacingOffSelector },
357 { 'cswh', kContextualAlternatesType, kContextualSwashAlternatesOnSelector, kContextualSwashAlternatesOffSelector },
358 { 'dlig', kLigaturesType, kRareLigaturesOnSelector, kRareLigaturesOffSelector },
359 { 'expt', kCharacterShapeType, kExpertCharactersSelector, 16 },
360 { 'frac', kFractionsType, kDiagonalFractionsSelector, kNoFractionsSelector },
361 { 'fwid', kTextSpacingType, kMonospacedTextSelector, 7 },
362 { 'halt', kTextSpacingType, kAltHalfWidthTextSelector, 7 },
363 { 'hist', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector },
364 { 'hkna', kAlternateKanaType, kAlternateHorizKanaOnSelector, kAlternateHorizKanaOffSelector, },
365 { 'hlig', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector },
366 { 'hngl', kTransliterationType, kHanjaToHangulSelector, kNoTransliterationSelector },
367 { 'hojo', kCharacterShapeType, kHojoCharactersSelector, 16 },
368 { 'hwid', kTextSpacingType, kHalfWidthTextSelector, 7 },
369 { 'ital', kItalicCJKRomanType, kCJKItalicRomanOnSelector, kCJKItalicRomanOffSelector },
370 { 'jp04', kCharacterShapeType, kJIS2004CharactersSelector, 16 },
371 { 'jp78', kCharacterShapeType, kJIS1978CharactersSelector, 16 },
372 { 'jp83', kCharacterShapeType, kJIS1983CharactersSelector, 16 },
373 { 'jp90', kCharacterShapeType, kJIS1990CharactersSelector, 16 },
374 { 'liga', kLigaturesType, kCommonLigaturesOnSelector, kCommonLigaturesOffSelector },
375 { 'lnum', kNumberCaseType, kUpperCaseNumbersSelector, 2 },
376 { 'mgrk', kMathematicalExtrasType, kMathematicalGreekOnSelector, kMathematicalGreekOffSelector },
377 { 'nlck', kCharacterShapeType, kNLCCharactersSelector, 16 },
378 { 'onum', kNumberCaseType, kLowerCaseNumbersSelector, 2 },
379 { 'ordn', kVerticalPositionType, kOrdinalsSelector, kNormalPositionSelector },
380 { 'palt', kTextSpacingType, kAltProportionalTextSelector, 7 },
381 { 'pcap', kLowerCaseType, kLowerCasePetiteCapsSelector, kDefaultLowerCaseSelector },
382 { 'pkna', kTextSpacingType, kProportionalTextSelector, 7 },
383 { 'pnum', kNumberSpacingType, kProportionalNumbersSelector, 4 },
384 { 'pwid', kTextSpacingType, kProportionalTextSelector, 7 },
385 { 'qwid', kTextSpacingType, kQuarterWidthTextSelector, 7 },
386 { 'ruby', kRubyKanaType, kRubyKanaOnSelector, kRubyKanaOffSelector },
387 { 'sinf', kVerticalPositionType, kScientificInferiorsSelector, kNormalPositionSelector },
388 { 'smcp', kLowerCaseType, kLowerCaseSmallCapsSelector, kDefaultLowerCaseSelector },
389 { 'smpl', kCharacterShapeType, kSimplifiedCharactersSelector, 16 },
390 { 'ss01', kStylisticAlternativesType, kStylisticAltOneOnSelector, kStylisticAltOneOffSelector },
391 { 'ss02', kStylisticAlternativesType, kStylisticAltTwoOnSelector, kStylisticAltTwoOffSelector },
392 { 'ss03', kStylisticAlternativesType, kStylisticAltThreeOnSelector, kStylisticAltThreeOffSelector },
393 { 'ss04', kStylisticAlternativesType, kStylisticAltFourOnSelector, kStylisticAltFourOffSelector },
394 { 'ss05', kStylisticAlternativesType, kStylisticAltFiveOnSelector, kStylisticAltFiveOffSelector },
395 { 'ss06', kStylisticAlternativesType, kStylisticAltSixOnSelector, kStylisticAltSixOffSelector },
396 { 'ss07', kStylisticAlternativesType, kStylisticAltSevenOnSelector, kStylisticAltSevenOffSelector },
397 { 'ss08', kStylisticAlternativesType, kStylisticAltEightOnSelector, kStylisticAltEightOffSelector },
398 { 'ss09', kStylisticAlternativesType, kStylisticAltNineOnSelector, kStylisticAltNineOffSelector },
399 { 'ss10', kStylisticAlternativesType, kStylisticAltTenOnSelector, kStylisticAltTenOffSelector },
400 { 'ss11', kStylisticAlternativesType, kStylisticAltElevenOnSelector, kStylisticAltElevenOffSelector },
401 { 'ss12', kStylisticAlternativesType, kStylisticAltTwelveOnSelector, kStylisticAltTwelveOffSelector },
402 { 'ss13', kStylisticAlternativesType, kStylisticAltThirteenOnSelector, kStylisticAltThirteenOffSelector },
403 { 'ss14', kStylisticAlternativesType, kStylisticAltFourteenOnSelector, kStylisticAltFourteenOffSelector },
404 { 'ss15', kStylisticAlternativesType, kStylisticAltFifteenOnSelector, kStylisticAltFifteenOffSelector },
405 { 'ss16', kStylisticAlternativesType, kStylisticAltSixteenOnSelector, kStylisticAltSixteenOffSelector },
406 { 'ss17', kStylisticAlternativesType, kStylisticAltSeventeenOnSelector, kStylisticAltSeventeenOffSelector },
407 { 'ss18', kStylisticAlternativesType, kStylisticAltEighteenOnSelector, kStylisticAltEighteenOffSelector },
408 { 'ss19', kStylisticAlternativesType, kStylisticAltNineteenOnSelector, kStylisticAltNineteenOffSelector },
409 { 'ss20', kStylisticAlternativesType, kStylisticAltTwentyOnSelector, kStylisticAltTwentyOffSelector },
410 { 'subs', kVerticalPositionType, kInferiorsSelector, kNormalPositionSelector },
411 { 'sups', kVerticalPositionType, kSuperiorsSelector, kNormalPositionSelector },
412 { 'swsh', kContextualAlternatesType, kSwashAlternatesOnSelector, kSwashAlternatesOffSelector },
413 { 'titl', kStyleOptionsType, kTitlingCapsSelector, kNoStyleOptionsSelector },
414 { 'tnam', kCharacterShapeType, kTraditionalNamesCharactersSelector, 16 },
415 { 'tnum', kNumberSpacingType, kMonospacedNumbersSelector, 4 },
416 { 'trad', kCharacterShapeType, kTraditionalCharactersSelector, 16 },
417 { 'twid', kTextSpacingType, kThirdWidthTextSelector, 7 },
418 { 'unic', kLetterCaseType, 14, 15 },
419 { 'valt', kTextSpacingType, kAltProportionalTextSelector, 7 },
420 { 'vert', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector },
421 { 'vhal', kTextSpacingType, kAltHalfWidthTextSelector, 7 },
422 { 'vkna', kAlternateKanaType, kAlternateVertKanaOnSelector, kAlternateVertKanaOffSelector },
423 { 'vpal', kTextSpacingType, kAltProportionalTextSelector, 7 },
424 { 'vrt2', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector },
425 { 'zero', kTypographicExtrasType, kSlashedZeroOnSelector, kSlashedZeroOffSelector },
426 };
427
428 static int
429 _hb_feature_mapping_cmp (const void *key_, const void *entry_)
430 {
431 unsigned int key = * (unsigned int *) key_;
432 const feature_mapping_t * entry = (const feature_mapping_t *) entry_;
433 return key < entry->otFeatureTag ? -1 :
434 key > entry->otFeatureTag ? 1 :
435 0;
436 }
437
438 hb_bool_t
439 _hb_coretext_shape (hb_shape_plan_t *shape_plan,
440 hb_font_t *font,
441 hb_buffer_t *buffer,
442 const hb_feature_t *features,
443 unsigned int num_features)
444 {
445 hb_face_t *face = font->face;
446 hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
447 hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
448
449 /* Attach marks to their bases, to match the 'ot' shaper.
450 * Adapted from hb-ot-shape:hb_form_clusters().
451 * Note that this only makes us be closer to the 'ot' shaper,
452 * but by no means the same. For example, if there's
453 * B1 M1 B2 M2, and B1-B2 form a ligature, M2's cluster will
454 * continue pointing to B2 even though B2 was merged into B1's
455 * cluster... */
456 {
457 hb_unicode_funcs_t *unicode = buffer->unicode;
458 unsigned int count = buffer->len;
459 hb_glyph_info_t *info = buffer->info;
460 for (unsigned int i = 1; i < count; i++)
461 if (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (unicode->general_category (info[i].codepoint)))
462 buffer->merge_clusters (i - 1, i + 1);
463 }
464
465 hb_auto_array_t<feature_record_t> feature_records;
466 hb_auto_array_t<range_record_t> range_records;
467
468 /*
469 * Set up features.
470 * (copied + modified from code from hb-uniscribe.cc)
471 */
472 if (num_features)
473 {
474 /* Sort features by start/end events. */
475 hb_auto_array_t<feature_event_t> feature_events;
476 for (unsigned int i = 0; i < num_features; i++)
477 {
478 const feature_mapping_t * mapping = (const feature_mapping_t *) bsearch (&features[i].tag,
479 feature_mappings,
480 ARRAY_LENGTH (feature_mappings),
481 sizeof (feature_mappings[0]),
482 _hb_feature_mapping_cmp);
483 if (!mapping)
484 continue;
485
486 active_feature_t feature;
487 feature.rec.feature = mapping->aatFeatureType;
488 feature.rec.setting = features[i].value ? mapping->selectorToEnable : mapping->selectorToDisable;
489 feature.order = i;
490
491 feature_event_t *event;
492
493 event = feature_events.push ();
494 if (unlikely (!event))
495 goto fail_features;
496 event->index = features[i].start;
497 event->start = true;
498 event->feature = feature;
499
500 event = feature_events.push ();
501 if (unlikely (!event))
502 goto fail_features;
503 event->index = features[i].end;
504 event->start = false;
505 event->feature = feature;
506 }
507 feature_events.qsort ();
508 /* Add a strategic final event. */
509 {
510 active_feature_t feature;
511 feature.rec.feature = HB_TAG_NONE;
512 feature.rec.setting = 0;
513 feature.order = num_features + 1;
514
515 feature_event_t *event = feature_events.push ();
516 if (unlikely (!event))
517 goto fail_features;
518 event->index = 0; /* This value does magic. */
519 event->start = false;
520 event->feature = feature;
521 }
522
523 /* Scan events and save features for each range. */
524 hb_auto_array_t<active_feature_t> active_features;
525 unsigned int last_index = 0;
526 for (unsigned int i = 0; i < feature_events.len; i++)
527 {
528 feature_event_t *event = &feature_events[i];
529
530 if (event->index != last_index)
531 {
532 /* Save a snapshot of active features and the range. */
533 range_record_t *range = range_records.push ();
534 if (unlikely (!range))
535 goto fail_features;
536
537 if (active_features.len)
538 {
539 CFMutableArrayRef features_array = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
540
541 /* TODO sort and resolve conflicting features? */
542 /* active_features.qsort (); */
543 for (unsigned int j = 0; j < active_features.len; j++)
544 {
545 CFStringRef keys[2] = {
546 kCTFontFeatureTypeIdentifierKey,
547 kCTFontFeatureSelectorIdentifierKey
548 };
549 CFNumberRef values[2] = {
550 CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.feature),
551 CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.setting)
552 };
553 CFDictionaryRef dict = CFDictionaryCreate (kCFAllocatorDefault,
554 (const void **) keys,
555 (const void **) values,
556 2,
557 &kCFTypeDictionaryKeyCallBacks,
558 &kCFTypeDictionaryValueCallBacks);
559 CFRelease (values[0]);
560 CFRelease (values[1]);
561
562 CFArrayAppendValue (features_array, dict);
563 CFRelease (dict);
564
565 }
566
567 CFDictionaryRef attributes = CFDictionaryCreate (kCFAllocatorDefault,
568 (const void **) &kCTFontFeatureSettingsAttribute,
569 (const void **) &features_array,
570 1,
571 &kCFTypeDictionaryKeyCallBacks,
572 &kCFTypeDictionaryValueCallBacks);
573 CFRelease (features_array);
574
575 CTFontDescriptorRef font_desc = CTFontDescriptorCreateWithAttributes (attributes);
576 CFRelease (attributes);
577
578 range->font = CTFontCreateCopyWithAttributes (font_data->ct_font, 0.0, NULL, font_desc);
579 CFRelease (font_desc);
580 }
581 else
582 {
583 range->font = NULL;
584 }
585
586 range->index_first = last_index;
587 range->index_last = event->index - 1;
588
589 last_index = event->index;
590 }
591
592 if (event->start) {
593 active_feature_t *feature = active_features.push ();
594 if (unlikely (!feature))
595 goto fail_features;
596 *feature = event->feature;
597 } else {
598 active_feature_t *feature = active_features.find (&event->feature);
599 if (feature)
600 active_features.remove (feature - active_features.array);
601 }
602 }
603
604 if (!range_records.len) /* No active feature found. */
605 goto fail_features;
606 }
607 else
608 {
609 fail_features:
610 num_features = 0;
611 }
612
613 unsigned int scratch_size;
614 hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size);
615
616 #define ALLOCATE_ARRAY(Type, name, len, on_no_room) \
617 Type *name = (Type *) scratch; \
618 { \
619 unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \
620 if (unlikely (_consumed > scratch_size)) \
621 { \
622 on_no_room; \
623 assert (0); \
624 } \
625 scratch += _consumed; \
626 scratch_size -= _consumed; \
627 }
628
629 ALLOCATE_ARRAY (UniChar, pchars, buffer->len * 2, /*nothing*/);
630 unsigned int chars_len = 0;
631 for (unsigned int i = 0; i < buffer->len; i++) {
632 hb_codepoint_t c = buffer->info[i].codepoint;
633 if (likely (c <= 0xFFFFu))
634 pchars[chars_len++] = c;
635 else if (unlikely (c > 0x10FFFFu))
636 pchars[chars_len++] = 0xFFFDu;
637 else {
638 pchars[chars_len++] = 0xD800u + ((c - 0x10000u) >> 10);
639 pchars[chars_len++] = 0xDC00u + ((c - 0x10000u) & ((1 << 10) - 1));
640 }
641 }
642
643 ALLOCATE_ARRAY (unsigned int, log_clusters, chars_len, /*nothing*/);
644 chars_len = 0;
645 for (unsigned int i = 0; i < buffer->len; i++)
646 {
647 hb_codepoint_t c = buffer->info[i].codepoint;
648 unsigned int cluster = buffer->info[i].cluster;
649 log_clusters[chars_len++] = cluster;
650 if (hb_in_range (c, 0x10000u, 0x10FFFFu))
651 log_clusters[chars_len++] = cluster; /* Surrogates. */
652 }
653
654 #define FAIL(...) \
655 HB_STMT_START { \
656 DEBUG_MSG (CORETEXT, NULL, __VA_ARGS__); \
657 ret = false; \
658 goto fail; \
659 } HB_STMT_END;
660
661 bool ret = true;
662 CFStringRef string_ref = NULL;
663 CTLineRef line = NULL;
664
665 if (0)
666 {
667 resize_and_retry:
668 DEBUG_MSG (CORETEXT, buffer, "Buffer resize");
669 /* string_ref uses the scratch-buffer for backing store, and line references
670 * string_ref (via attr_string). We must release those before resizing buffer. */
671 assert (string_ref);
672 assert (line);
673 CFRelease (string_ref);
674 CFRelease (line);
675 string_ref = NULL;
676 line = NULL;
677
678 /* Get previous start-of-scratch-area, that we use later for readjusting
679 * our existing scratch arrays. */
680 unsigned int old_scratch_used;
681 hb_buffer_t::scratch_buffer_t *old_scratch;
682 old_scratch = buffer->get_scratch_buffer (&old_scratch_used);
683 old_scratch_used = scratch - old_scratch;
684
685 if (unlikely (!buffer->ensure (buffer->allocated * 2)))
686 FAIL ("Buffer resize failed");
687
688 /* Adjust scratch, pchars, and log_cluster arrays. This is ugly, but really the
689 * cleanest way to do without completely restructuring the rest of this shaper. */
690 scratch = buffer->get_scratch_buffer (&scratch_size);
691 pchars = reinterpret_cast<UniChar *> (((char *) scratch + ((char *) pchars - (char *) old_scratch)));
692 log_clusters = reinterpret_cast<unsigned int *> (((char *) scratch + ((char *) log_clusters - (char *) old_scratch)));
693 scratch += old_scratch_used;
694 scratch_size -= old_scratch_used;
695 }
696 retry:
697 {
698 string_ref = CFStringCreateWithCharactersNoCopy (NULL,
699 pchars, chars_len,
700 kCFAllocatorNull);
701 if (unlikely (!string_ref))
702 FAIL ("CFStringCreateWithCharactersNoCopy failed");
703
704 /* Create an attributed string, populate it, and create a line from it, then release attributed string. */
705 {
706 CFMutableAttributedStringRef attr_string = CFAttributedStringCreateMutable (kCFAllocatorDefault,
707 chars_len);
708 if (unlikely (!attr_string))
709 FAIL ("CFAttributedStringCreateMutable failed");
710 CFAttributedStringReplaceString (attr_string, CFRangeMake (0, 0), string_ref);
711 if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
712 {
713 CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
714 kCTVerticalFormsAttributeName, kCFBooleanTrue);
715 }
716
717 if (buffer->props.language)
718 {
719 /* What's the iOS equivalent of this check?
720 * The symbols was introduced in iOS 7.0.
721 * At any rate, our fallback is safe and works fine. */
722 #if MAC_OS_X_VERSION_MIN_REQUIRED < 1090
723 # define kCTLanguageAttributeName CFSTR ("NSLanguage")
724 #endif
725 CFStringRef lang = CFStringCreateWithCStringNoCopy (kCFAllocatorDefault,
726 hb_language_to_string (buffer->props.language),
727 kCFStringEncodingUTF8,
728 kCFAllocatorNull);
729 if (unlikely (!lang))
730 FAIL ("CFStringCreateWithCStringNoCopy failed");
731 CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
732 kCTLanguageAttributeName, lang);
733 CFRelease (lang);
734 }
735 CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
736 kCTFontAttributeName, font_data->ct_font);
737
738 if (num_features)
739 {
740 unsigned int start = 0;
741 range_record_t *last_range = &range_records[0];
742 for (unsigned int k = 0; k < chars_len; k++)
743 {
744 range_record_t *range = last_range;
745 while (log_clusters[k] < range->index_first)
746 range--;
747 while (log_clusters[k] > range->index_last)
748 range++;
749 if (range != last_range)
750 {
751 if (last_range->font)
752 CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, k - start),
753 kCTFontAttributeName, last_range->font);
754
755 start = k;
756 }
757
758 last_range = range;
759 }
760 if (start != chars_len && last_range->font)
761 CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, chars_len - start),
762 kCTFontAttributeName, last_range->font);
763 }
764
765 int level = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
766 CFNumberRef level_number = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &level);
767 CFDictionaryRef options = CFDictionaryCreate (kCFAllocatorDefault,
768 (const void **) &kCTTypesetterOptionForcedEmbeddingLevel,
769 (const void **) &level_number,
770 1,
771 &kCFTypeDictionaryKeyCallBacks,
772 &kCFTypeDictionaryValueCallBacks);
773 if (unlikely (!options))
774 FAIL ("CFDictionaryCreate failed");
775
776 CTTypesetterRef typesetter = CTTypesetterCreateWithAttributedStringAndOptions (attr_string, options);
777 CFRelease (options);
778 CFRelease (attr_string);
779 if (unlikely (!typesetter))
780 FAIL ("CTTypesetterCreateWithAttributedStringAndOptions failed");
781
782 line = CTTypesetterCreateLine (typesetter, CFRangeMake(0, 0));
783 CFRelease (typesetter);
784 if (unlikely (!line))
785 FAIL ("CTTypesetterCreateLine failed");
786 }
787
788 CFArrayRef glyph_runs = CTLineGetGlyphRuns (line);
789 unsigned int num_runs = CFArrayGetCount (glyph_runs);
790 DEBUG_MSG (CORETEXT, NULL, "Num runs: %d", num_runs);
791
792 buffer->len = 0;
793 uint32_t status_and = ~0, status_or = 0;
794 double advances_so_far = 0;
795 /* For right-to-left runs, CoreText returns the glyphs positioned such that
796 * any trailing whitespace is to the left of (0,0). Adjust coordinate system
797 * to fix for that. Test with any RTL string with trailing spaces.
798 * https://code.google.com/p/chromium/issues/detail?id=469028
799 */
800 if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
801 {
802 advances_so_far -= CTLineGetTrailingWhitespaceWidth (line);
803 if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
804 advances_so_far = -advances_so_far;
805 }
806
807 const CFRange range_all = CFRangeMake (0, 0);
808
809 for (unsigned int i = 0; i < num_runs; i++)
810 {
811 CTRunRef run = static_cast<CTRunRef>(CFArrayGetValueAtIndex (glyph_runs, i));
812 CTRunStatus run_status = CTRunGetStatus (run);
813 status_or |= run_status;
814 status_and &= run_status;
815 DEBUG_MSG (CORETEXT, run, "CTRunStatus: %x", run_status);
816 double run_advance = CTRunGetTypographicBounds (run, range_all, NULL, NULL, NULL);
817 if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
818 run_advance = -run_advance;
819 DEBUG_MSG (CORETEXT, run, "Run advance: %g", run_advance);
820
821 /* CoreText does automatic font fallback (AKA "cascading") for characters
822 * not supported by the requested font, and provides no way to turn it off,
823 * so we must detect if the returned run uses a font other than the requested
824 * one and fill in the buffer with .notdef glyphs instead of random glyph
825 * indices from a different font.
826 */
827 CFDictionaryRef attributes = CTRunGetAttributes (run);
828 CTFontRef run_ct_font = static_cast<CTFontRef>(CFDictionaryGetValue (attributes, kCTFontAttributeName));
829 if (!CFEqual (run_ct_font, font_data->ct_font))
830 {
831 /* The run doesn't use our main font instance. We have to figure out
832 * whether font fallback happened, or this is just CoreText giving us
833 * another CTFont using the same underlying CGFont. CoreText seems
834 * to do that in a variety of situations, one of which being vertical
835 * text, but also perhaps for caching reasons.
836 *
837 * First, see if it uses any of our subfonts created to set font features...
838 *
839 * Next, compare the CGFont to the one we used to create our fonts.
840 * Even this doesn't work all the time.
841 *
842 * Finally, we compare PS names, which I don't think are unique...
843 *
844 * Looks like if we really want to be sure here we have to modify the
845 * font to change the name table, similar to what we do in the uniscribe
846 * backend.
847 *
848 * However, even that wouldn't work if we were passed in the CGFont to
849 * begin with.
850 *
851 * Webkit uses a slightly different approach: it installs LastResort
852 * as fallback chain, and then checks PS name of used font against
853 * LastResort. That one is safe for any font except for LastResort,
854 * as opposed to ours, which can fail if we are using any uninstalled
855 * font that has the same name as an installed font.
856 *
857 * See: http://github.com/behdad/harfbuzz/pull/36
858 */
859 bool matched = false;
860 for (unsigned int i = 0; i < range_records.len; i++)
861 if (range_records[i].font && CFEqual (run_ct_font, range_records[i].font))
862 {
863 matched = true;
864 break;
865 }
866 if (!matched)
867 {
868 CGFontRef run_cg_font = CTFontCopyGraphicsFont (run_ct_font, 0);
869 if (run_cg_font)
870 {
871 matched = CFEqual (run_cg_font, face_data);
872 CFRelease (run_cg_font);
873 }
874 }
875 if (!matched)
876 {
877 CFStringRef font_ps_name = CTFontCopyName (font_data->ct_font, kCTFontPostScriptNameKey);
878 CFStringRef run_ps_name = CTFontCopyName (run_ct_font, kCTFontPostScriptNameKey);
879 CFComparisonResult result = CFStringCompare (run_ps_name, font_ps_name, 0);
880 CFRelease (run_ps_name);
881 CFRelease (font_ps_name);
882 if (result == kCFCompareEqualTo)
883 matched = true;
884 }
885 if (!matched)
886 {
887 CFRange range = CTRunGetStringRange (run);
888 DEBUG_MSG (CORETEXT, run, "Run used fallback font: %ld..%ld",
889 range.location, range.location + range.length);
890 if (!buffer->ensure_inplace (buffer->len + range.length))
891 goto resize_and_retry;
892 hb_glyph_info_t *info = buffer->info + buffer->len;
893
894 hb_codepoint_t notdef = 0;
895 hb_direction_t dir = buffer->props.direction;
896 hb_position_t x_advance, y_advance, x_offset, y_offset;
897 hb_font_get_glyph_advance_for_direction (font, notdef, dir, &x_advance, &y_advance);
898 hb_font_get_glyph_origin_for_direction (font, notdef, dir, &x_offset, &y_offset);
899 hb_position_t advance = x_advance + y_advance;
900 x_offset = -x_offset;
901 y_offset = -y_offset;
902
903 unsigned int old_len = buffer->len;
904 for (CFIndex j = range.location; j < range.location + range.length; j++)
905 {
906 UniChar ch = CFStringGetCharacterAtIndex (string_ref, j);
907 if (hb_in_range<UniChar> (ch, 0xDC00u, 0xDFFFu) && range.location < j)
908 {
909 ch = CFStringGetCharacterAtIndex (string_ref, j - 1);
910 if (hb_in_range<UniChar> (ch, 0xD800u, 0xDBFFu))
911 /* This is the second of a surrogate pair. Don't need .notdef
912 * for this one. */
913 continue;
914 }
915 if (buffer->unicode->is_default_ignorable (ch))
916 continue;
917
918 info->codepoint = notdef;
919 info->cluster = log_clusters[j];
920
921 info->mask = advance;
922 info->var1.i32 = x_offset;
923 info->var2.i32 = y_offset;
924
925 info++;
926 buffer->len++;
927 }
928 if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
929 buffer->reverse_range (old_len, buffer->len);
930 advances_so_far += run_advance;
931 continue;
932 }
933 }
934
935 unsigned int num_glyphs = CTRunGetGlyphCount (run);
936 if (num_glyphs == 0)
937 continue;
938
939 if (!buffer->ensure_inplace (buffer->len + num_glyphs))
940 goto resize_and_retry;
941
942 hb_glyph_info_t *run_info = buffer->info + buffer->len;
943
944 /* Testing used to indicate that CTRunGetGlyphsPtr, etc (almost?) always
945 * succeed, and so copying data to our own buffer will be rare. Reports
946 * have it that this changed in OS X 10.10 Yosemite, and NULL is returned
947 * frequently. At any rate, we can test that codepath by setting USE_PTR
948 * to false. */
949
950 #define USE_PTR true
951
952 #define SCRATCH_SAVE() \
953 unsigned int scratch_size_saved = scratch_size; \
954 hb_buffer_t::scratch_buffer_t *scratch_saved = scratch
955
956 #define SCRATCH_RESTORE() \
957 scratch_size = scratch_size_saved; \
958 scratch = scratch_saved;
959
960 { /* Setup glyphs */
961 SCRATCH_SAVE();
962 const CGGlyph* glyphs = USE_PTR ? CTRunGetGlyphsPtr (run) : NULL;
963 if (!glyphs) {
964 ALLOCATE_ARRAY (CGGlyph, glyph_buf, num_glyphs, goto resize_and_retry);
965 CTRunGetGlyphs (run, range_all, glyph_buf);
966 glyphs = glyph_buf;
967 }
968 const CFIndex* string_indices = USE_PTR ? CTRunGetStringIndicesPtr (run) : NULL;
969 if (!string_indices) {
970 ALLOCATE_ARRAY (CFIndex, index_buf, num_glyphs, goto resize_and_retry);
971 CTRunGetStringIndices (run, range_all, index_buf);
972 string_indices = index_buf;
973 }
974 hb_glyph_info_t *info = run_info;
975 for (unsigned int j = 0; j < num_glyphs; j++)
976 {
977 info->codepoint = glyphs[j];
978 info->cluster = log_clusters[string_indices[j]];
979 info++;
980 }
981 SCRATCH_RESTORE();
982 }
983 {
984 /* Setup positions.
985 * Note that CoreText does not return advances for glyphs. As such,
986 * for all but last glyph, we use the delta position to next glyph as
987 * advance (in the advance direction only), and for last glyph we set
988 * whatever is needed to make the whole run's advance add up. */
989 SCRATCH_SAVE();
990 const CGPoint* positions = USE_PTR ? CTRunGetPositionsPtr (run) : NULL;
991 if (!positions) {
992 ALLOCATE_ARRAY (CGPoint, position_buf, num_glyphs, goto resize_and_retry);
993 CTRunGetPositions (run, range_all, position_buf);
994 positions = position_buf;
995 }
996 hb_glyph_info_t *info = run_info;
997 CGFloat x_mult = font_data->x_mult, y_mult = font_data->y_mult;
998 if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction))
999 {
1000 hb_position_t x_offset = (positions[0].x - advances_so_far) * x_mult;
1001 for (unsigned int j = 0; j < num_glyphs; j++)
1002 {
1003 double advance;
1004 if (likely (j + 1 < num_glyphs))
1005 advance = positions[j + 1].x - positions[j].x;
1006 else /* last glyph */
1007 advance = run_advance - (positions[j].x - positions[0].x);
1008 info->mask = advance * x_mult;
1009 info->var1.i32 = x_offset;
1010 info->var2.i32 = positions[j].y * y_mult;
1011 info++;
1012 }
1013 }
1014 else
1015 {
1016 hb_position_t y_offset = (positions[0].y - advances_so_far) * y_mult;
1017 for (unsigned int j = 0; j < num_glyphs; j++)
1018 {
1019 double advance;
1020 if (likely (j + 1 < num_glyphs))
1021 advance = positions[j + 1].y - positions[j].y;
1022 else /* last glyph */
1023 advance = run_advance - (positions[j].y - positions[0].y);
1024 info->mask = advance * y_mult;
1025 info->var1.i32 = positions[j].x * x_mult;
1026 info->var2.i32 = y_offset;
1027 info++;
1028 }
1029 }
1030 SCRATCH_RESTORE();
1031 advances_so_far += run_advance;
1032 }
1033 #undef SCRATCH_RESTORE
1034 #undef SCRATCH_SAVE
1035 #undef USE_PTR
1036 #undef ALLOCATE_ARRAY
1037
1038 buffer->len += num_glyphs;
1039 }
1040
1041 /* Mac OS 10.6 doesn't have kCTTypesetterOptionForcedEmbeddingLevel,
1042 * or if it does, it doesn't resepct it. So we get runs with wrong
1043 * directions. As such, disable the assert... It wouldn't crash, but
1044 * cursoring will be off...
1045 *
1046 * http://crbug.com/419769
1047 */
1048 if (0)
1049 {
1050 /* Make sure all runs had the expected direction. */
1051 bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
1052 assert (bool (status_and & kCTRunStatusRightToLeft) == backward);
1053 assert (bool (status_or & kCTRunStatusRightToLeft) == backward);
1054 }
1055
1056 buffer->clear_positions ();
1057
1058 unsigned int count = buffer->len;
1059 hb_glyph_info_t *info = buffer->info;
1060 hb_glyph_position_t *pos = buffer->pos;
1061 if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction))
1062 for (unsigned int i = 0; i < count; i++)
1063 {
1064 pos->x_advance = info->mask;
1065 pos->x_offset = info->var1.i32;
1066 pos->y_offset = info->var2.i32;
1067 info++, pos++;
1068 }
1069 else
1070 for (unsigned int i = 0; i < count; i++)
1071 {
1072 pos->y_advance = info->mask;
1073 pos->x_offset = info->var1.i32;
1074 pos->y_offset = info->var2.i32;
1075 info++, pos++;
1076 }
1077
1078 /* Fix up clusters so that we never return out-of-order indices;
1079 * if core text has reordered glyphs, we'll merge them to the
1080 * beginning of the reordered cluster. CoreText is nice enough
1081 * to tell us whenever it has produced nonmonotonic results...
1082 * Note that we assume the input clusters were nonmonotonic to
1083 * begin with.
1084 *
1085 * This does *not* mean we'll form the same clusters as Uniscribe
1086 * or the native OT backend, only that the cluster indices will be
1087 * monotonic in the output buffer. */
1088 if (count > 1 && (status_or & kCTRunStatusNonMonotonic))
1089 {
1090 hb_glyph_info_t *info = buffer->info;
1091 if (HB_DIRECTION_IS_FORWARD (buffer->props.direction))
1092 {
1093 unsigned int cluster = info[count - 1].cluster;
1094 for (unsigned int i = count - 1; i > 0; i--)
1095 {
1096 cluster = MIN (cluster, info[i - 1].cluster);
1097 info[i - 1].cluster = cluster;
1098 }
1099 }
1100 else
1101 {
1102 unsigned int cluster = info[0].cluster;
1103 for (unsigned int i = 1; i < count; i++)
1104 {
1105 cluster = MIN (cluster, info[i].cluster);
1106 info[i].cluster = cluster;
1107 }
1108 }
1109 }
1110 }
1111
1112 #undef FAIL
1113
1114 fail:
1115 if (string_ref)
1116 CFRelease (string_ref);
1117 if (line)
1118 CFRelease (line);
1119
1120 for (unsigned int i = 0; i < range_records.len; i++)
1121 if (range_records[i].font)
1122 CFRelease (range_records[i].font);
1123
1124 return ret;
1125 }
1126
1127
1128 /*
1129 * AAT shaper
1130 */
1131
1132 HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, face)
1133 HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, font)
1134
1135
1136 /*
1137 * shaper face data
1138 */
1139
1140 struct hb_coretext_aat_shaper_face_data_t {};
1141
1142 hb_coretext_aat_shaper_face_data_t *
1143 _hb_coretext_aat_shaper_face_data_create (hb_face_t *face)
1144 {
1145 hb_blob_t *mort_blob = face->reference_table (HB_CORETEXT_TAG_MORT);
1146 /* Umm, we just reference the table to check whether it exists.
1147 * Maybe add better API for this? */
1148 if (!hb_blob_get_length (mort_blob))
1149 {
1150 hb_blob_destroy (mort_blob);
1151 mort_blob = face->reference_table (HB_CORETEXT_TAG_MORX);
1152 if (!hb_blob_get_length (mort_blob))
1153 {
1154 hb_blob_destroy (mort_blob);
1155 return NULL;
1156 }
1157 }
1158 hb_blob_destroy (mort_blob);
1159
1160 return hb_coretext_shaper_face_data_ensure (face) ? (hb_coretext_aat_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL;
1161 }
1162
1163 void
1164 _hb_coretext_aat_shaper_face_data_destroy (hb_coretext_aat_shaper_face_data_t *data HB_UNUSED)
1165 {
1166 }
1167
1168
1169 /*
1170 * shaper font data
1171 */
1172
1173 struct hb_coretext_aat_shaper_font_data_t {};
1174
1175 hb_coretext_aat_shaper_font_data_t *
1176 _hb_coretext_aat_shaper_font_data_create (hb_font_t *font)
1177 {
1178 return hb_coretext_shaper_font_data_ensure (font) ? (hb_coretext_aat_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL;
1179 }
1180
1181 void
1182 _hb_coretext_aat_shaper_font_data_destroy (hb_coretext_aat_shaper_font_data_t *data HB_UNUSED)
1183 {
1184 }
1185
1186
1187 /*
1188 * shaper shape_plan data
1189 */
1190
1191 struct hb_coretext_aat_shaper_shape_plan_data_t {};
1192
1193 hb_coretext_aat_shaper_shape_plan_data_t *
1194 _hb_coretext_aat_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
1195 const hb_feature_t *user_features HB_UNUSED,
1196 unsigned int num_user_features HB_UNUSED)
1197 {
1198 return (hb_coretext_aat_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
1199 }
1200
1201 void
1202 _hb_coretext_aat_shaper_shape_plan_data_destroy (hb_coretext_aat_shaper_shape_plan_data_t *data HB_UNUSED)
1203 {
1204 }
1205
1206
1207 /*
1208 * shaper
1209 */
1210
1211 hb_bool_t
1212 _hb_coretext_aat_shape (hb_shape_plan_t *shape_plan,
1213 hb_font_t *font,
1214 hb_buffer_t *buffer,
1215 const hb_feature_t *features,
1216 unsigned int num_features)
1217 {
1218 return _hb_coretext_shape (shape_plan, font, buffer, features, num_features);
1219 }