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
release_table_data(void * user_data)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 *
reference_table(hb_face_t * face HB_UNUSED,hb_tag_t tag,void * user_data)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 *
hb_coretext_face_create(CGFontRef cg_font)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
HB_SHAPER_DATA_ENSURE_DECLARE(coretext,face)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 *
_hb_coretext_shaper_face_data_create(hb_face_t * face)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
_hb_coretext_shaper_face_data_destroy(hb_coretext_shaper_face_data_t * data)123 _hb_coretext_shaper_face_data_destroy (hb_coretext_shaper_face_data_t *data)
124 {
125 CFRelease (data);
126 }
127
128 CGFontRef
hb_coretext_face_get_cg_font(hb_face_t * face)129 hb_coretext_face_get_cg_font (hb_face_t *face)
130 {
131 if (unlikely (!hb_coretext_shaper_face_data_ensure (face))) return NULL;
132 hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
133 return face_data;
134 }
135
136
137 /*
138 * shaper font data
139 */
140
141 struct hb_coretext_shaper_font_data_t {
142 CTFontRef ct_font;
143 CGFloat x_mult, y_mult; /* From CT space to HB space. */
144 };
145
146 hb_coretext_shaper_font_data_t *
_hb_coretext_shaper_font_data_create(hb_font_t * font)147 _hb_coretext_shaper_font_data_create (hb_font_t *font)
148 {
149 if (unlikely (!hb_coretext_shaper_face_data_ensure (font->face))) return NULL;
150
151 hb_coretext_shaper_font_data_t *data = (hb_coretext_shaper_font_data_t *) calloc (1, sizeof (hb_coretext_shaper_font_data_t));
152 if (unlikely (!data))
153 return NULL;
154
155 hb_face_t *face = font->face;
156 hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
157
158 /* Choose a CoreText font size and calculate multipliers to convert to HarfBuzz space. */
159 CGFloat font_size = 36.; /* Default... */
160 /* No idea if the following is even a good idea. */
161 if (font->y_ppem)
162 font_size = font->y_ppem;
163
164 if (font_size < 0)
165 font_size = -font_size;
166 data->x_mult = (CGFloat) font->x_scale / font_size;
167 data->y_mult = (CGFloat) font->y_scale / font_size;
168 data->ct_font = CTFontCreateWithGraphicsFont (face_data, font_size, NULL, NULL);
169 if (unlikely (!data->ct_font)) {
170 DEBUG_MSG (CORETEXT, font, "Font CTFontCreateWithGraphicsFont() failed");
171 free (data);
172 return NULL;
173 }
174
175 return data;
176 }
177
178 void
_hb_coretext_shaper_font_data_destroy(hb_coretext_shaper_font_data_t * data)179 _hb_coretext_shaper_font_data_destroy (hb_coretext_shaper_font_data_t *data)
180 {
181 CFRelease (data->ct_font);
182 free (data);
183 }
184
185
186 /*
187 * shaper shape_plan data
188 */
189
190 struct hb_coretext_shaper_shape_plan_data_t {};
191
192 hb_coretext_shaper_shape_plan_data_t *
_hb_coretext_shaper_shape_plan_data_create(hb_shape_plan_t * shape_plan HB_UNUSED,const hb_feature_t * user_features HB_UNUSED,unsigned int num_user_features HB_UNUSED)193 _hb_coretext_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
194 const hb_feature_t *user_features HB_UNUSED,
195 unsigned int num_user_features HB_UNUSED)
196 {
197 return (hb_coretext_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
198 }
199
200 void
_hb_coretext_shaper_shape_plan_data_destroy(hb_coretext_shaper_shape_plan_data_t * data HB_UNUSED)201 _hb_coretext_shaper_shape_plan_data_destroy (hb_coretext_shaper_shape_plan_data_t *data HB_UNUSED)
202 {
203 }
204
205 CTFontRef
hb_coretext_font_get_ct_font(hb_font_t * font)206 hb_coretext_font_get_ct_font (hb_font_t *font)
207 {
208 if (unlikely (!hb_coretext_shaper_font_data_ensure (font))) return NULL;
209 hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
210 return font_data->ct_font;
211 }
212
213
214 /*
215 * shaper
216 */
217
218 struct feature_record_t {
219 unsigned int feature;
220 unsigned int setting;
221 };
222
223 struct active_feature_t {
224 feature_record_t rec;
225 unsigned int order;
226
cmpactive_feature_t227 static int cmp (const active_feature_t *a, const active_feature_t *b) {
228 return a->rec.feature < b->rec.feature ? -1 : a->rec.feature > b->rec.feature ? 1 :
229 a->order < b->order ? -1 : a->order > b->order ? 1 :
230 a->rec.setting < b->rec.setting ? -1 : a->rec.setting > b->rec.setting ? 1 :
231 0;
232 }
operator ==active_feature_t233 bool operator== (const active_feature_t *f) {
234 return cmp (this, f) == 0;
235 }
236 };
237
238 struct feature_event_t {
239 unsigned int index;
240 bool start;
241 active_feature_t feature;
242
cmpfeature_event_t243 static int cmp (const feature_event_t *a, const feature_event_t *b) {
244 return a->index < b->index ? -1 : a->index > b->index ? 1 :
245 a->start < b->start ? -1 : a->start > b->start ? 1 :
246 active_feature_t::cmp (&a->feature, &b->feature);
247 }
248 };
249
250 struct range_record_t {
251 CTFontRef font;
252 unsigned int index_first; /* == start */
253 unsigned int index_last; /* == end - 1 */
254 };
255
256
257 /* The following enum members are added in OS X 10.8. */
258 #define kAltHalfWidthTextSelector 6
259 #define kAltProportionalTextSelector 5
260 #define kAlternateHorizKanaOffSelector 1
261 #define kAlternateHorizKanaOnSelector 0
262 #define kAlternateKanaType 34
263 #define kAlternateVertKanaOffSelector 3
264 #define kAlternateVertKanaOnSelector 2
265 #define kCaseSensitiveLayoutOffSelector 1
266 #define kCaseSensitiveLayoutOnSelector 0
267 #define kCaseSensitiveLayoutType 33
268 #define kCaseSensitiveSpacingOffSelector 3
269 #define kCaseSensitiveSpacingOnSelector 2
270 #define kContextualAlternatesOffSelector 1
271 #define kContextualAlternatesOnSelector 0
272 #define kContextualAlternatesType 36
273 #define kContextualLigaturesOffSelector 19
274 #define kContextualLigaturesOnSelector 18
275 #define kContextualSwashAlternatesOffSelector 5
276 #define kContextualSwashAlternatesOnSelector 4
277 #define kDefaultLowerCaseSelector 0
278 #define kDefaultUpperCaseSelector 0
279 #define kHistoricalLigaturesOffSelector 21
280 #define kHistoricalLigaturesOnSelector 20
281 #define kHojoCharactersSelector 12
282 #define kJIS2004CharactersSelector 11
283 #define kLowerCasePetiteCapsSelector 2
284 #define kLowerCaseSmallCapsSelector 1
285 #define kLowerCaseType 37
286 #define kMathematicalGreekOffSelector 11
287 #define kMathematicalGreekOnSelector 10
288 #define kNLCCharactersSelector 13
289 #define kQuarterWidthTextSelector 4
290 #define kScientificInferiorsSelector 4
291 #define kStylisticAltEightOffSelector 17
292 #define kStylisticAltEightOnSelector 16
293 #define kStylisticAltEighteenOffSelector 37
294 #define kStylisticAltEighteenOnSelector 36
295 #define kStylisticAltElevenOffSelector 23
296 #define kStylisticAltElevenOnSelector 22
297 #define kStylisticAltFifteenOffSelector 31
298 #define kStylisticAltFifteenOnSelector 30
299 #define kStylisticAltFiveOffSelector 11
300 #define kStylisticAltFiveOnSelector 10
301 #define kStylisticAltFourOffSelector 9
302 #define kStylisticAltFourOnSelector 8
303 #define kStylisticAltFourteenOffSelector 29
304 #define kStylisticAltFourteenOnSelector 28
305 #define kStylisticAltNineOffSelector 19
306 #define kStylisticAltNineOnSelector 18
307 #define kStylisticAltNineteenOffSelector 39
308 #define kStylisticAltNineteenOnSelector 38
309 #define kStylisticAltOneOffSelector 3
310 #define kStylisticAltOneOnSelector 2
311 #define kStylisticAltSevenOffSelector 15
312 #define kStylisticAltSevenOnSelector 14
313 #define kStylisticAltSeventeenOffSelector 35
314 #define kStylisticAltSeventeenOnSelector 34
315 #define kStylisticAltSixOffSelector 13
316 #define kStylisticAltSixOnSelector 12
317 #define kStylisticAltSixteenOffSelector 33
318 #define kStylisticAltSixteenOnSelector 32
319 #define kStylisticAltTenOffSelector 21
320 #define kStylisticAltTenOnSelector 20
321 #define kStylisticAltThirteenOffSelector 27
322 #define kStylisticAltThirteenOnSelector 26
323 #define kStylisticAltThreeOffSelector 7
324 #define kStylisticAltThreeOnSelector 6
325 #define kStylisticAltTwelveOffSelector 25
326 #define kStylisticAltTwelveOnSelector 24
327 #define kStylisticAltTwentyOffSelector 41
328 #define kStylisticAltTwentyOnSelector 40
329 #define kStylisticAltTwoOffSelector 5
330 #define kStylisticAltTwoOnSelector 4
331 #define kStylisticAlternativesType 35
332 #define kSwashAlternatesOffSelector 3
333 #define kSwashAlternatesOnSelector 2
334 #define kThirdWidthTextSelector 3
335 #define kTraditionalNamesCharactersSelector 14
336 #define kUpperCasePetiteCapsSelector 2
337 #define kUpperCaseSmallCapsSelector 1
338 #define kUpperCaseType 38
339
340 /* Table data courtesy of Apple. */
341 static const struct feature_mapping_t {
342 FourCharCode otFeatureTag;
343 uint16_t aatFeatureType;
344 uint16_t selectorToEnable;
345 uint16_t selectorToDisable;
346 } feature_mappings[] = {
347 { 'c2pc', kUpperCaseType, kUpperCasePetiteCapsSelector, kDefaultUpperCaseSelector },
348 { 'c2sc', kUpperCaseType, kUpperCaseSmallCapsSelector, kDefaultUpperCaseSelector },
349 { 'calt', kContextualAlternatesType, kContextualAlternatesOnSelector, kContextualAlternatesOffSelector },
350 { 'case', kCaseSensitiveLayoutType, kCaseSensitiveLayoutOnSelector, kCaseSensitiveLayoutOffSelector },
351 { 'clig', kLigaturesType, kContextualLigaturesOnSelector, kContextualLigaturesOffSelector },
352 { 'cpsp', kCaseSensitiveLayoutType, kCaseSensitiveSpacingOnSelector, kCaseSensitiveSpacingOffSelector },
353 { 'cswh', kContextualAlternatesType, kContextualSwashAlternatesOnSelector, kContextualSwashAlternatesOffSelector },
354 { 'dlig', kLigaturesType, kRareLigaturesOnSelector, kRareLigaturesOffSelector },
355 { 'expt', kCharacterShapeType, kExpertCharactersSelector, 16 },
356 { 'frac', kFractionsType, kDiagonalFractionsSelector, kNoFractionsSelector },
357 { 'fwid', kTextSpacingType, kMonospacedTextSelector, 7 },
358 { 'halt', kTextSpacingType, kAltHalfWidthTextSelector, 7 },
359 { 'hist', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector },
360 { 'hkna', kAlternateKanaType, kAlternateHorizKanaOnSelector, kAlternateHorizKanaOffSelector, },
361 { 'hlig', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector },
362 { 'hngl', kTransliterationType, kHanjaToHangulSelector, kNoTransliterationSelector },
363 { 'hojo', kCharacterShapeType, kHojoCharactersSelector, 16 },
364 { 'hwid', kTextSpacingType, kHalfWidthTextSelector, 7 },
365 { 'ital', kItalicCJKRomanType, kCJKItalicRomanOnSelector, kCJKItalicRomanOffSelector },
366 { 'jp04', kCharacterShapeType, kJIS2004CharactersSelector, 16 },
367 { 'jp78', kCharacterShapeType, kJIS1978CharactersSelector, 16 },
368 { 'jp83', kCharacterShapeType, kJIS1983CharactersSelector, 16 },
369 { 'jp90', kCharacterShapeType, kJIS1990CharactersSelector, 16 },
370 { 'liga', kLigaturesType, kCommonLigaturesOnSelector, kCommonLigaturesOffSelector },
371 { 'lnum', kNumberCaseType, kUpperCaseNumbersSelector, 2 },
372 { 'mgrk', kMathematicalExtrasType, kMathematicalGreekOnSelector, kMathematicalGreekOffSelector },
373 { 'nlck', kCharacterShapeType, kNLCCharactersSelector, 16 },
374 { 'onum', kNumberCaseType, kLowerCaseNumbersSelector, 2 },
375 { 'ordn', kVerticalPositionType, kOrdinalsSelector, kNormalPositionSelector },
376 { 'palt', kTextSpacingType, kAltProportionalTextSelector, 7 },
377 { 'pcap', kLowerCaseType, kLowerCasePetiteCapsSelector, kDefaultLowerCaseSelector },
378 { 'pkna', kTextSpacingType, kProportionalTextSelector, 7 },
379 { 'pnum', kNumberSpacingType, kProportionalNumbersSelector, 4 },
380 { 'pwid', kTextSpacingType, kProportionalTextSelector, 7 },
381 { 'qwid', kTextSpacingType, kQuarterWidthTextSelector, 7 },
382 { 'ruby', kRubyKanaType, kRubyKanaOnSelector, kRubyKanaOffSelector },
383 { 'sinf', kVerticalPositionType, kScientificInferiorsSelector, kNormalPositionSelector },
384 { 'smcp', kLowerCaseType, kLowerCaseSmallCapsSelector, kDefaultLowerCaseSelector },
385 { 'smpl', kCharacterShapeType, kSimplifiedCharactersSelector, 16 },
386 { 'ss01', kStylisticAlternativesType, kStylisticAltOneOnSelector, kStylisticAltOneOffSelector },
387 { 'ss02', kStylisticAlternativesType, kStylisticAltTwoOnSelector, kStylisticAltTwoOffSelector },
388 { 'ss03', kStylisticAlternativesType, kStylisticAltThreeOnSelector, kStylisticAltThreeOffSelector },
389 { 'ss04', kStylisticAlternativesType, kStylisticAltFourOnSelector, kStylisticAltFourOffSelector },
390 { 'ss05', kStylisticAlternativesType, kStylisticAltFiveOnSelector, kStylisticAltFiveOffSelector },
391 { 'ss06', kStylisticAlternativesType, kStylisticAltSixOnSelector, kStylisticAltSixOffSelector },
392 { 'ss07', kStylisticAlternativesType, kStylisticAltSevenOnSelector, kStylisticAltSevenOffSelector },
393 { 'ss08', kStylisticAlternativesType, kStylisticAltEightOnSelector, kStylisticAltEightOffSelector },
394 { 'ss09', kStylisticAlternativesType, kStylisticAltNineOnSelector, kStylisticAltNineOffSelector },
395 { 'ss10', kStylisticAlternativesType, kStylisticAltTenOnSelector, kStylisticAltTenOffSelector },
396 { 'ss11', kStylisticAlternativesType, kStylisticAltElevenOnSelector, kStylisticAltElevenOffSelector },
397 { 'ss12', kStylisticAlternativesType, kStylisticAltTwelveOnSelector, kStylisticAltTwelveOffSelector },
398 { 'ss13', kStylisticAlternativesType, kStylisticAltThirteenOnSelector, kStylisticAltThirteenOffSelector },
399 { 'ss14', kStylisticAlternativesType, kStylisticAltFourteenOnSelector, kStylisticAltFourteenOffSelector },
400 { 'ss15', kStylisticAlternativesType, kStylisticAltFifteenOnSelector, kStylisticAltFifteenOffSelector },
401 { 'ss16', kStylisticAlternativesType, kStylisticAltSixteenOnSelector, kStylisticAltSixteenOffSelector },
402 { 'ss17', kStylisticAlternativesType, kStylisticAltSeventeenOnSelector, kStylisticAltSeventeenOffSelector },
403 { 'ss18', kStylisticAlternativesType, kStylisticAltEighteenOnSelector, kStylisticAltEighteenOffSelector },
404 { 'ss19', kStylisticAlternativesType, kStylisticAltNineteenOnSelector, kStylisticAltNineteenOffSelector },
405 { 'ss20', kStylisticAlternativesType, kStylisticAltTwentyOnSelector, kStylisticAltTwentyOffSelector },
406 { 'subs', kVerticalPositionType, kInferiorsSelector, kNormalPositionSelector },
407 { 'sups', kVerticalPositionType, kSuperiorsSelector, kNormalPositionSelector },
408 { 'swsh', kContextualAlternatesType, kSwashAlternatesOnSelector, kSwashAlternatesOffSelector },
409 { 'titl', kStyleOptionsType, kTitlingCapsSelector, kNoStyleOptionsSelector },
410 { 'tnam', kCharacterShapeType, kTraditionalNamesCharactersSelector, 16 },
411 { 'tnum', kNumberSpacingType, kMonospacedNumbersSelector, 4 },
412 { 'trad', kCharacterShapeType, kTraditionalCharactersSelector, 16 },
413 { 'twid', kTextSpacingType, kThirdWidthTextSelector, 7 },
414 { 'unic', kLetterCaseType, 14, 15 },
415 { 'valt', kTextSpacingType, kAltProportionalTextSelector, 7 },
416 { 'vert', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector },
417 { 'vhal', kTextSpacingType, kAltHalfWidthTextSelector, 7 },
418 { 'vkna', kAlternateKanaType, kAlternateVertKanaOnSelector, kAlternateVertKanaOffSelector },
419 { 'vpal', kTextSpacingType, kAltProportionalTextSelector, 7 },
420 { 'vrt2', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector },
421 { 'zero', kTypographicExtrasType, kSlashedZeroOnSelector, kSlashedZeroOffSelector },
422 };
423
424 static int
_hb_feature_mapping_cmp(const void * key_,const void * entry_)425 _hb_feature_mapping_cmp (const void *key_, const void *entry_)
426 {
427 unsigned int key = * (unsigned int *) key_;
428 const feature_mapping_t * entry = (const feature_mapping_t *) entry_;
429 return key < entry->otFeatureTag ? -1 :
430 key > entry->otFeatureTag ? 1 :
431 0;
432 }
433
434 hb_bool_t
_hb_coretext_shape(hb_shape_plan_t * shape_plan,hb_font_t * font,hb_buffer_t * buffer,const hb_feature_t * features,unsigned int num_features)435 _hb_coretext_shape (hb_shape_plan_t *shape_plan,
436 hb_font_t *font,
437 hb_buffer_t *buffer,
438 const hb_feature_t *features,
439 unsigned int num_features)
440 {
441 hb_face_t *face = font->face;
442 hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
443 hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
444
445 /* Attach marks to their bases, to match the 'ot' shaper.
446 * Adapted from hb-ot-shape:hb_form_clusters().
447 * Note that this only makes us be closer to the 'ot' shaper,
448 * but by no means the same. For example, if there's
449 * B1 M1 B2 M2, and B1-B2 form a ligature, M2's cluster will
450 * continue pointing to B2 even though B2 was merged into B1's
451 * cluster... */
452 {
453 hb_unicode_funcs_t *unicode = buffer->unicode;
454 unsigned int count = buffer->len;
455 hb_glyph_info_t *info = buffer->info;
456 for (unsigned int i = 1; i < count; i++)
457 if (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (unicode->general_category (info[i].codepoint)))
458 buffer->merge_clusters (i - 1, i + 1);
459 }
460
461 hb_auto_array_t<feature_record_t> feature_records;
462 hb_auto_array_t<range_record_t> range_records;
463
464 /*
465 * Set up features.
466 * (copied + modified from code from hb-uniscribe.cc)
467 */
468 if (num_features)
469 {
470 /* Sort features by start/end events. */
471 hb_auto_array_t<feature_event_t> feature_events;
472 for (unsigned int i = 0; i < num_features; i++)
473 {
474 const feature_mapping_t * mapping = (const feature_mapping_t *) bsearch (&features[i].tag,
475 feature_mappings,
476 ARRAY_LENGTH (feature_mappings),
477 sizeof (feature_mappings[0]),
478 _hb_feature_mapping_cmp);
479 if (!mapping)
480 continue;
481
482 active_feature_t feature;
483 feature.rec.feature = mapping->aatFeatureType;
484 feature.rec.setting = features[i].value ? mapping->selectorToEnable : mapping->selectorToDisable;
485 feature.order = i;
486
487 feature_event_t *event;
488
489 event = feature_events.push ();
490 if (unlikely (!event))
491 goto fail_features;
492 event->index = features[i].start;
493 event->start = true;
494 event->feature = feature;
495
496 event = feature_events.push ();
497 if (unlikely (!event))
498 goto fail_features;
499 event->index = features[i].end;
500 event->start = false;
501 event->feature = feature;
502 }
503 feature_events.qsort ();
504 /* Add a strategic final event. */
505 {
506 active_feature_t feature;
507 feature.rec.feature = HB_TAG_NONE;
508 feature.rec.setting = 0;
509 feature.order = num_features + 1;
510
511 feature_event_t *event = feature_events.push ();
512 if (unlikely (!event))
513 goto fail_features;
514 event->index = 0; /* This value does magic. */
515 event->start = false;
516 event->feature = feature;
517 }
518
519 /* Scan events and save features for each range. */
520 hb_auto_array_t<active_feature_t> active_features;
521 unsigned int last_index = 0;
522 for (unsigned int i = 0; i < feature_events.len; i++)
523 {
524 feature_event_t *event = &feature_events[i];
525
526 if (event->index != last_index)
527 {
528 /* Save a snapshot of active features and the range. */
529 range_record_t *range = range_records.push ();
530 if (unlikely (!range))
531 goto fail_features;
532
533 if (active_features.len)
534 {
535 CFMutableArrayRef features_array = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
536
537 /* TODO sort and resolve conflicting features? */
538 /* active_features.qsort (); */
539 for (unsigned int j = 0; j < active_features.len; j++)
540 {
541 CFStringRef keys[2] = {
542 kCTFontFeatureTypeIdentifierKey,
543 kCTFontFeatureSelectorIdentifierKey
544 };
545 CFNumberRef values[2] = {
546 CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.feature),
547 CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.setting)
548 };
549 CFDictionaryRef dict = CFDictionaryCreate (kCFAllocatorDefault,
550 (const void **) keys,
551 (const void **) values,
552 2,
553 &kCFTypeDictionaryKeyCallBacks,
554 &kCFTypeDictionaryValueCallBacks);
555 CFRelease (values[0]);
556 CFRelease (values[1]);
557
558 CFArrayAppendValue (features_array, dict);
559 CFRelease (dict);
560
561 }
562
563 CFDictionaryRef attributes = CFDictionaryCreate (kCFAllocatorDefault,
564 (const void **) &kCTFontFeatureSettingsAttribute,
565 (const void **) &features_array,
566 1,
567 &kCFTypeDictionaryKeyCallBacks,
568 &kCFTypeDictionaryValueCallBacks);
569 CFRelease (features_array);
570
571 CTFontDescriptorRef font_desc = CTFontDescriptorCreateWithAttributes (attributes);
572 CFRelease (attributes);
573
574 range->font = CTFontCreateCopyWithAttributes (font_data->ct_font, 0.0, NULL, font_desc);
575 CFRelease (font_desc);
576 }
577 else
578 {
579 range->font = NULL;
580 }
581
582 range->index_first = last_index;
583 range->index_last = event->index - 1;
584
585 last_index = event->index;
586 }
587
588 if (event->start) {
589 active_feature_t *feature = active_features.push ();
590 if (unlikely (!feature))
591 goto fail_features;
592 *feature = event->feature;
593 } else {
594 active_feature_t *feature = active_features.find (&event->feature);
595 if (feature)
596 active_features.remove (feature - active_features.array);
597 }
598 }
599
600 if (!range_records.len) /* No active feature found. */
601 goto fail_features;
602 }
603 else
604 {
605 fail_features:
606 num_features = 0;
607 }
608
609 unsigned int scratch_size;
610 hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size);
611
612 #define ALLOCATE_ARRAY(Type, name, len, on_no_room) \
613 Type *name = (Type *) scratch; \
614 { \
615 unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \
616 if (unlikely (_consumed > scratch_size)) \
617 { \
618 on_no_room; \
619 assert (0); \
620 } \
621 scratch += _consumed; \
622 scratch_size -= _consumed; \
623 }
624
625 ALLOCATE_ARRAY (UniChar, pchars, buffer->len * 2, /*nothing*/);
626 unsigned int chars_len = 0;
627 for (unsigned int i = 0; i < buffer->len; i++) {
628 hb_codepoint_t c = buffer->info[i].codepoint;
629 if (likely (c <= 0xFFFFu))
630 pchars[chars_len++] = c;
631 else if (unlikely (c > 0x10FFFFu))
632 pchars[chars_len++] = 0xFFFDu;
633 else {
634 pchars[chars_len++] = 0xD800u + ((c - 0x10000u) >> 10);
635 pchars[chars_len++] = 0xDC00u + ((c - 0x10000u) & ((1 << 10) - 1));
636 }
637 }
638
639 ALLOCATE_ARRAY (unsigned int, log_clusters, chars_len, /*nothing*/);
640 chars_len = 0;
641 for (unsigned int i = 0; i < buffer->len; i++)
642 {
643 hb_codepoint_t c = buffer->info[i].codepoint;
644 unsigned int cluster = buffer->info[i].cluster;
645 log_clusters[chars_len++] = cluster;
646 if (hb_in_range (c, 0x10000u, 0x10FFFFu))
647 log_clusters[chars_len++] = cluster; /* Surrogates. */
648 }
649
650 #define FAIL(...) \
651 HB_STMT_START { \
652 DEBUG_MSG (CORETEXT, NULL, __VA_ARGS__); \
653 ret = false; \
654 goto fail; \
655 } HB_STMT_END;
656
657 bool ret = true;
658 CFStringRef string_ref = NULL;
659 CTLineRef line = NULL;
660
661 if (0)
662 {
663 resize_and_retry:
664 DEBUG_MSG (CORETEXT, buffer, "Buffer resize");
665 /* string_ref uses the scratch-buffer for backing store, and line references
666 * string_ref (via attr_string). We must release those before resizing buffer. */
667 assert (string_ref);
668 assert (line);
669 CFRelease (string_ref);
670 CFRelease (line);
671 string_ref = NULL;
672 line = NULL;
673
674 /* Get previous start-of-scratch-area, that we use later for readjusting
675 * our existing scratch arrays. */
676 unsigned int old_scratch_used;
677 hb_buffer_t::scratch_buffer_t *old_scratch;
678 old_scratch = buffer->get_scratch_buffer (&old_scratch_used);
679 old_scratch_used = scratch - old_scratch;
680
681 if (unlikely (!buffer->ensure (buffer->allocated * 2)))
682 FAIL ("Buffer resize failed");
683
684 /* Adjust scratch, pchars, and log_cluster arrays. This is ugly, but really the
685 * cleanest way to do without completely restructuring the rest of this shaper. */
686 scratch = buffer->get_scratch_buffer (&scratch_size);
687 pchars = reinterpret_cast<UniChar *> (((char *) scratch + ((char *) pchars - (char *) old_scratch)));
688 log_clusters = reinterpret_cast<unsigned int *> (((char *) scratch + ((char *) log_clusters - (char *) old_scratch)));
689 scratch += old_scratch_used;
690 scratch_size -= old_scratch_used;
691 }
692 retry:
693 {
694 string_ref = CFStringCreateWithCharactersNoCopy (NULL,
695 pchars, chars_len,
696 kCFAllocatorNull);
697 if (unlikely (!string_ref))
698 FAIL ("CFStringCreateWithCharactersNoCopy failed");
699
700 /* Create an attributed string, populate it, and create a line from it, then release attributed string. */
701 {
702 CFMutableAttributedStringRef attr_string = CFAttributedStringCreateMutable (kCFAllocatorDefault,
703 chars_len);
704 if (unlikely (!attr_string))
705 FAIL ("CFAttributedStringCreateMutable failed");
706 CFAttributedStringReplaceString (attr_string, CFRangeMake (0, 0), string_ref);
707 if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
708 {
709 CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
710 kCTVerticalFormsAttributeName, kCFBooleanTrue);
711 }
712
713 if (buffer->props.language)
714 {
715 /* What's the iOS equivalent of this check?
716 * The symbols was introduced in iOS 7.0.
717 * At any rate, our fallback is safe and works fine. */
718 #if MAC_OS_X_VERSION_MIN_REQUIRED < 1090
719 # define kCTLanguageAttributeName CFSTR ("NSLanguage")
720 #endif
721 CFStringRef lang = CFStringCreateWithCStringNoCopy (kCFAllocatorDefault,
722 hb_language_to_string (buffer->props.language),
723 kCFStringEncodingUTF8,
724 kCFAllocatorNull);
725 if (unlikely (!lang))
726 FAIL ("CFStringCreateWithCStringNoCopy failed");
727 CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
728 kCTLanguageAttributeName, lang);
729 CFRelease (lang);
730 }
731 CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
732 kCTFontAttributeName, font_data->ct_font);
733
734 if (num_features)
735 {
736 unsigned int start = 0;
737 range_record_t *last_range = &range_records[0];
738 for (unsigned int k = 0; k < chars_len; k++)
739 {
740 range_record_t *range = last_range;
741 while (log_clusters[k] < range->index_first)
742 range--;
743 while (log_clusters[k] > range->index_last)
744 range++;
745 if (range != last_range)
746 {
747 if (last_range->font)
748 CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, k - start),
749 kCTFontAttributeName, last_range->font);
750
751 start = k;
752 }
753
754 last_range = range;
755 }
756 if (start != chars_len && last_range->font)
757 CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, chars_len - start),
758 kCTFontAttributeName, last_range->font);
759 }
760
761 int level = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
762 CFNumberRef level_number = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &level);
763 CFDictionaryRef options = CFDictionaryCreate (kCFAllocatorDefault,
764 (const void **) &kCTTypesetterOptionForcedEmbeddingLevel,
765 (const void **) &level_number,
766 1,
767 &kCFTypeDictionaryKeyCallBacks,
768 &kCFTypeDictionaryValueCallBacks);
769 if (unlikely (!options))
770 FAIL ("CFDictionaryCreate failed");
771
772 CTTypesetterRef typesetter = CTTypesetterCreateWithAttributedStringAndOptions (attr_string, options);
773 CFRelease (options);
774 CFRelease (attr_string);
775 if (unlikely (!typesetter))
776 FAIL ("CTTypesetterCreateWithAttributedStringAndOptions failed");
777
778 line = CTTypesetterCreateLine (typesetter, CFRangeMake(0, 0));
779 CFRelease (typesetter);
780 if (unlikely (!line))
781 FAIL ("CTTypesetterCreateLine failed");
782 }
783
784 CFArrayRef glyph_runs = CTLineGetGlyphRuns (line);
785 unsigned int num_runs = CFArrayGetCount (glyph_runs);
786 DEBUG_MSG (CORETEXT, NULL, "Num runs: %d", num_runs);
787
788 buffer->len = 0;
789 uint32_t status_and = ~0, status_or = 0;
790
791 const CFRange range_all = CFRangeMake (0, 0);
792
793 for (unsigned int i = 0; i < num_runs; i++)
794 {
795 CTRunRef run = static_cast<CTRunRef>(CFArrayGetValueAtIndex (glyph_runs, i));
796 CTRunStatus run_status = CTRunGetStatus (run);
797 status_or |= run_status;
798 status_and &= run_status;
799 DEBUG_MSG (CORETEXT, run, "CTRunStatus: %x", run_status);
800
801 /* CoreText does automatic font fallback (AKA "cascading") for characters
802 * not supported by the requested font, and provides no way to turn it off,
803 * so we must detect if the returned run uses a font other than the requested
804 * one and fill in the buffer with .notdef glyphs instead of random glyph
805 * indices from a different font.
806 */
807 CFDictionaryRef attributes = CTRunGetAttributes (run);
808 CTFontRef run_ct_font = static_cast<CTFontRef>(CFDictionaryGetValue (attributes, kCTFontAttributeName));
809 if (!CFEqual (run_ct_font, font_data->ct_font))
810 {
811 /* The run doesn't use our main font instance. We have to figure out
812 * whether font fallback happened, or this is just CoreText giving us
813 * another CTFont using the same underlying CGFont. CoreText seems
814 * to do that in a variety of situations, one of which being vertical
815 * text, but also perhaps for caching reasons.
816 *
817 * First, see if it uses any of our subfonts created to set font features...
818 *
819 * Next, compare the CGFont to the one we used to create our fonts.
820 * Even this doesn't work all the time.
821 *
822 * Finally, we compare PS names, which I don't think are unique...
823 *
824 * Looks like if we really want to be sure here we have to modify the
825 * font to change the name table, similar to what we do in the uniscribe
826 * backend.
827 *
828 * However, even that wouldn't work if we were passed in the CGFont to
829 * begin with.
830 *
831 * Webkit uses a slightly different approach: it installs LastResort
832 * as fallback chain, and then checks PS name of used font against
833 * LastResort. That one is safe for any font except for LastResort,
834 * as opposed to ours, which can fail if we are using any uninstalled
835 * font that has the same name as an installed font.
836 *
837 * See: http://github.com/behdad/harfbuzz/pull/36
838 */
839 bool matched = false;
840 for (unsigned int i = 0; i < range_records.len; i++)
841 if (range_records[i].font && CFEqual (run_ct_font, range_records[i].font))
842 {
843 matched = true;
844 break;
845 }
846 if (!matched)
847 {
848 CGFontRef run_cg_font = CTFontCopyGraphicsFont (run_ct_font, 0);
849 if (run_cg_font)
850 {
851 matched = CFEqual (run_cg_font, face_data);
852 CFRelease (run_cg_font);
853 }
854 }
855 if (!matched)
856 {
857 CFStringRef font_ps_name = CTFontCopyName (font_data->ct_font, kCTFontPostScriptNameKey);
858 CFStringRef run_ps_name = CTFontCopyName (run_ct_font, kCTFontPostScriptNameKey);
859 CFComparisonResult result = CFStringCompare (run_ps_name, font_ps_name, 0);
860 CFRelease (run_ps_name);
861 CFRelease (font_ps_name);
862 if (result == kCFCompareEqualTo)
863 matched = true;
864 }
865 if (!matched)
866 {
867 CFRange range = CTRunGetStringRange (run);
868 DEBUG_MSG (CORETEXT, run, "Run used fallback font: %ld..%ld",
869 range.location, range.location + range.length);
870 if (!buffer->ensure_inplace (buffer->len + range.length))
871 goto resize_and_retry;
872 hb_glyph_info_t *info = buffer->info + buffer->len;
873
874 hb_codepoint_t notdef = 0;
875 hb_direction_t dir = buffer->props.direction;
876 hb_position_t x_advance, y_advance, x_offset, y_offset;
877 hb_font_get_glyph_advance_for_direction (font, notdef, dir, &x_advance, &y_advance);
878 hb_font_get_glyph_origin_for_direction (font, notdef, dir, &x_offset, &y_offset);
879 hb_position_t advance = x_advance + y_advance;
880 x_offset = -x_offset;
881 y_offset = -y_offset;
882
883 unsigned int old_len = buffer->len;
884 for (CFIndex j = range.location; j < range.location + range.length; j++)
885 {
886 UniChar ch = CFStringGetCharacterAtIndex (string_ref, j);
887 if (hb_in_range<UniChar> (ch, 0xDC00u, 0xDFFFu) && range.location < j)
888 {
889 ch = CFStringGetCharacterAtIndex (string_ref, j - 1);
890 if (hb_in_range<UniChar> (ch, 0xD800u, 0xDBFFu))
891 /* This is the second of a surrogate pair. Don't need .notdef
892 * for this one. */
893 continue;
894 }
895
896 info->codepoint = notdef;
897 info->cluster = log_clusters[j];
898
899 info->mask = advance;
900 info->var1.u32 = x_offset;
901 info->var2.u32 = y_offset;
902
903 info++;
904 buffer->len++;
905 }
906 if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
907 buffer->reverse_range (old_len, buffer->len);
908 continue;
909 }
910 }
911
912 unsigned int num_glyphs = CTRunGetGlyphCount (run);
913 if (num_glyphs == 0)
914 continue;
915
916 if (!buffer->ensure_inplace (buffer->len + num_glyphs))
917 goto resize_and_retry;
918
919 hb_glyph_info_t *run_info = buffer->info + buffer->len;
920
921 /* Testing used to indicate that CTRunGetGlyphsPtr, etc (almost?) always
922 * succeed, and so copying data to our own buffer will be rare. Reports
923 * have it that this changed in OS X 10.10 Yosemite, and NULL is returned
924 * frequently. At any rate, we can test that codepath by setting USE_PTR
925 * to false. */
926
927 #define USE_PTR true
928
929 #define SCRATCH_SAVE() \
930 unsigned int scratch_size_saved = scratch_size; \
931 hb_buffer_t::scratch_buffer_t *scratch_saved = scratch
932
933 #define SCRATCH_RESTORE() \
934 scratch_size = scratch_size_saved; \
935 scratch = scratch_saved;
936
937 {
938 SCRATCH_SAVE();
939 const CGGlyph* glyphs = USE_PTR ? CTRunGetGlyphsPtr (run) : NULL;
940 if (!glyphs) {
941 ALLOCATE_ARRAY (CGGlyph, glyph_buf, num_glyphs, goto resize_and_retry);
942 CTRunGetGlyphs (run, range_all, glyph_buf);
943 glyphs = glyph_buf;
944 }
945 const CFIndex* string_indices = USE_PTR ? CTRunGetStringIndicesPtr (run) : NULL;
946 if (!string_indices) {
947 ALLOCATE_ARRAY (CFIndex, index_buf, num_glyphs, goto resize_and_retry);
948 CTRunGetStringIndices (run, range_all, index_buf);
949 string_indices = index_buf;
950 }
951 hb_glyph_info_t *info = run_info;
952 for (unsigned int j = 0; j < num_glyphs; j++)
953 {
954 info->codepoint = glyphs[j];
955 info->cluster = log_clusters[string_indices[j]];
956 info++;
957 }
958 SCRATCH_RESTORE();
959 }
960 {
961 SCRATCH_SAVE();
962 const CGPoint* positions = USE_PTR ? CTRunGetPositionsPtr (run) : NULL;
963 if (!positions) {
964 ALLOCATE_ARRAY (CGPoint, position_buf, num_glyphs, goto resize_and_retry);
965 CTRunGetPositions (run, range_all, position_buf);
966 positions = position_buf;
967 }
968 double run_advance = CTRunGetTypographicBounds (run, range_all, NULL, NULL, NULL);
969 DEBUG_MSG (CORETEXT, run, "Run advance: %g", run_advance);
970 hb_glyph_info_t *info = run_info;
971 CGFloat x_mult = font_data->x_mult, y_mult = font_data->y_mult;
972 if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction))
973 {
974 for (unsigned int j = 0; j < num_glyphs; j++)
975 {
976 double advance = (j + 1 < num_glyphs ? positions[j + 1].x : positions[0].x + run_advance) - positions[j].x;
977 info->mask = advance * x_mult;
978 info->var1.u32 = positions[0].x * x_mult; /* Yes, zero. */
979 info->var2.u32 = positions[j].y * y_mult;
980 info++;
981 }
982 }
983 else
984 {
985 run_advance = -run_advance;
986 for (unsigned int j = 0; j < num_glyphs; j++)
987 {
988 double advance = (j + 1 < num_glyphs ? positions[j + 1].y : positions[0].y + run_advance) - positions[j].y;
989 info->mask = advance * y_mult;
990 info->var1.u32 = positions[j].x * x_mult;
991 info->var2.u32 = positions[0].y * y_mult; /* Yes, zero. */
992 info++;
993 }
994 }
995 SCRATCH_RESTORE();
996 }
997 #undef SCRATCH_RESTORE
998 #undef SCRATCH_SAVE
999 #undef USE_PTR
1000 #undef ALLOCATE_ARRAY
1001
1002 buffer->len += num_glyphs;
1003 }
1004
1005 /* Make sure all runs had the expected direction. */
1006 bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
1007 assert (bool (status_and & kCTRunStatusRightToLeft) == backward);
1008 assert (bool (status_or & kCTRunStatusRightToLeft) == backward);
1009
1010 buffer->clear_positions ();
1011
1012 unsigned int count = buffer->len;
1013 hb_glyph_info_t *info = buffer->info;
1014 hb_glyph_position_t *pos = buffer->pos;
1015 if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction))
1016 for (unsigned int i = 0; i < count; i++)
1017 {
1018 pos->x_advance = info->mask;
1019 pos->x_offset = info->var1.u32;
1020 pos->y_offset = info->var2.u32;
1021 info++, pos++;
1022 }
1023 else
1024 for (unsigned int i = 0; i < count; i++)
1025 {
1026 pos->y_advance = info->mask;
1027 pos->x_offset = info->var1.u32;
1028 pos->y_offset = info->var2.u32;
1029 info++, pos++;
1030 }
1031
1032 /* Fix up clusters so that we never return out-of-order indices;
1033 * if core text has reordered glyphs, we'll merge them to the
1034 * beginning of the reordered cluster. CoreText is nice enough
1035 * to tell us whenever it has produced nonmonotonic results...
1036 * Note that we assume the input clusters were nonmonotonic to
1037 * begin with.
1038 *
1039 * This does *not* mean we'll form the same clusters as Uniscribe
1040 * or the native OT backend, only that the cluster indices will be
1041 * monotonic in the output buffer. */
1042 if (count > 1 && (status_or & kCTRunStatusNonMonotonic))
1043 {
1044 hb_glyph_info_t *info = buffer->info;
1045 if (HB_DIRECTION_IS_FORWARD (buffer->props.direction))
1046 {
1047 unsigned int cluster = info[count - 1].cluster;
1048 for (unsigned int i = count - 1; i > 0; i--)
1049 {
1050 cluster = MIN (cluster, info[i - 1].cluster);
1051 info[i - 1].cluster = cluster;
1052 }
1053 }
1054 else
1055 {
1056 unsigned int cluster = info[0].cluster;
1057 for (unsigned int i = 1; i < count; i++)
1058 {
1059 cluster = MIN (cluster, info[i].cluster);
1060 info[i].cluster = cluster;
1061 }
1062 }
1063 }
1064 }
1065
1066 #undef FAIL
1067
1068 fail:
1069 if (string_ref)
1070 CFRelease (string_ref);
1071 if (line)
1072 CFRelease (line);
1073
1074 for (unsigned int i = 0; i < range_records.len; i++)
1075 if (range_records[i].font)
1076 CFRelease (range_records[i].font);
1077
1078 return ret;
1079 }
1080
1081
1082 /*
1083 * AAT shaper
1084 */
1085
1086 HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, face)
1087 HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, font)
1088
1089
1090 /*
1091 * shaper face data
1092 */
1093
1094 struct hb_coretext_aat_shaper_face_data_t {};
1095
1096 hb_coretext_aat_shaper_face_data_t *
_hb_coretext_aat_shaper_face_data_create(hb_face_t * face)1097 _hb_coretext_aat_shaper_face_data_create (hb_face_t *face)
1098 {
1099 hb_blob_t *mort_blob = face->reference_table (HB_CORETEXT_TAG_MORT);
1100 /* Umm, we just reference the table to check whether it exists.
1101 * Maybe add better API for this? */
1102 if (!hb_blob_get_length (mort_blob))
1103 {
1104 hb_blob_destroy (mort_blob);
1105 mort_blob = face->reference_table (HB_CORETEXT_TAG_MORX);
1106 if (!hb_blob_get_length (mort_blob))
1107 {
1108 hb_blob_destroy (mort_blob);
1109 return NULL;
1110 }
1111 }
1112 hb_blob_destroy (mort_blob);
1113
1114 return hb_coretext_shaper_face_data_ensure (face) ? (hb_coretext_aat_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL;
1115 }
1116
1117 void
_hb_coretext_aat_shaper_face_data_destroy(hb_coretext_aat_shaper_face_data_t * data HB_UNUSED)1118 _hb_coretext_aat_shaper_face_data_destroy (hb_coretext_aat_shaper_face_data_t *data HB_UNUSED)
1119 {
1120 }
1121
1122
1123 /*
1124 * shaper font data
1125 */
1126
1127 struct hb_coretext_aat_shaper_font_data_t {};
1128
1129 hb_coretext_aat_shaper_font_data_t *
_hb_coretext_aat_shaper_font_data_create(hb_font_t * font)1130 _hb_coretext_aat_shaper_font_data_create (hb_font_t *font)
1131 {
1132 return hb_coretext_shaper_font_data_ensure (font) ? (hb_coretext_aat_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL;
1133 }
1134
1135 void
_hb_coretext_aat_shaper_font_data_destroy(hb_coretext_aat_shaper_font_data_t * data HB_UNUSED)1136 _hb_coretext_aat_shaper_font_data_destroy (hb_coretext_aat_shaper_font_data_t *data HB_UNUSED)
1137 {
1138 }
1139
1140
1141 /*
1142 * shaper shape_plan data
1143 */
1144
1145 struct hb_coretext_aat_shaper_shape_plan_data_t {};
1146
1147 hb_coretext_aat_shaper_shape_plan_data_t *
_hb_coretext_aat_shaper_shape_plan_data_create(hb_shape_plan_t * shape_plan HB_UNUSED,const hb_feature_t * user_features HB_UNUSED,unsigned int num_user_features HB_UNUSED)1148 _hb_coretext_aat_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
1149 const hb_feature_t *user_features HB_UNUSED,
1150 unsigned int num_user_features HB_UNUSED)
1151 {
1152 return (hb_coretext_aat_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
1153 }
1154
1155 void
_hb_coretext_aat_shaper_shape_plan_data_destroy(hb_coretext_aat_shaper_shape_plan_data_t * data HB_UNUSED)1156 _hb_coretext_aat_shaper_shape_plan_data_destroy (hb_coretext_aat_shaper_shape_plan_data_t *data HB_UNUSED)
1157 {
1158 }
1159
1160
1161 /*
1162 * shaper
1163 */
1164
1165 hb_bool_t
_hb_coretext_aat_shape(hb_shape_plan_t * shape_plan,hb_font_t * font,hb_buffer_t * buffer,const hb_feature_t * features,unsigned int num_features)1166 _hb_coretext_aat_shape (hb_shape_plan_t *shape_plan,
1167 hb_font_t *font,
1168 hb_buffer_t *buffer,
1169 const hb_feature_t *features,
1170 unsigned int num_features)
1171 {
1172 return _hb_coretext_shape (shape_plan, font, buffer, features, num_features);
1173 }
1174