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 41static void 42release_table_data (void *user_data) 43{ 44 CFDataRef cf_data = reinterpret_cast<CFDataRef> (user_data); 45 CFRelease(cf_data); 46} 47 48static hb_blob_t * 49reference_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 66hb_face_t * 67hb_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 73HB_SHAPER_DATA_ENSURE_DECLARE(coretext, face) 74HB_SHAPER_DATA_ENSURE_DECLARE(coretext, font) 75 76 77/* 78 * shaper face data 79 */ 80 81static void 82release_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 90hb_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 122void 123_hb_coretext_shaper_face_data_destroy (hb_coretext_shaper_face_data_t *data) 124{ 125 CFRelease (data); 126} 127 128CGFontRef 129hb_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 141struct hb_coretext_shaper_font_data_t { 142 CTFontRef ct_font; 143 CGFloat x_mult, y_mult; /* From CT space to HB space. */ 144}; 145 146hb_coretext_shaper_font_data_t * 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 178void 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 190struct hb_coretext_shaper_shape_plan_data_t {}; 191 192hb_coretext_shaper_shape_plan_data_t * 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 200void 201_hb_coretext_shaper_shape_plan_data_destroy (hb_coretext_shaper_shape_plan_data_t *data HB_UNUSED) 202{ 203} 204 205CTFontRef 206hb_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 218struct feature_record_t { 219 unsigned int feature; 220 unsigned int setting; 221}; 222 223struct active_feature_t { 224 feature_record_t rec; 225 unsigned int order; 226 227 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 } 233 bool operator== (const active_feature_t *f) { 234 return cmp (this, f) == 0; 235 } 236}; 237 238struct feature_event_t { 239 unsigned int index; 240 bool start; 241 active_feature_t feature; 242 243 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 250struct 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. */ 341static 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 424static int 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 434hb_bool_t 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 { 663resize_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 } 692retry: 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 1068fail: 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 1086HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, face) 1087HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, font) 1088 1089 1090/* 1091 * shaper face data 1092 */ 1093 1094struct hb_coretext_aat_shaper_face_data_t {}; 1095 1096hb_coretext_aat_shaper_face_data_t * 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 1117void 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 1127struct hb_coretext_aat_shaper_font_data_t {}; 1128 1129hb_coretext_aat_shaper_font_data_t * 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 1135void 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 1145struct hb_coretext_aat_shaper_shape_plan_data_t {}; 1146 1147hb_coretext_aat_shaper_shape_plan_data_t * 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 1155void 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 1165hb_bool_t 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