| /* |
| * Copyright © 2012,2013 Mozilla Foundation. |
| * Copyright © 2012,2013 Google, Inc. |
| * |
| * This is part of HarfBuzz, a text shaping library. |
| * |
| * Permission is hereby granted, without written agreement and without |
| * license or royalty fees, to use, copy, modify, and distribute this |
| * software and its documentation for any purpose, provided that the |
| * above copyright notice and the following two paragraphs appear in |
| * all copies of this software. |
| * |
| * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| * |
| * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| * |
| * Mozilla Author(s): Jonathan Kew |
| * Google Author(s): Behdad Esfahbod |
| */ |
| |
| #define HB_SHAPER coretext |
| #include "hb-shaper-impl-private.hh" |
| |
| #include "hb-coretext.h" |
| |
| |
| #ifndef HB_DEBUG_CORETEXT |
| #define HB_DEBUG_CORETEXT (HB_DEBUG+0) |
| #endif |
| |
| |
| static void |
| release_table_data (void *user_data) |
| { |
| CFDataRef cf_data = reinterpret_cast<CFDataRef> (user_data); |
| CFRelease(cf_data); |
| } |
| |
| static hb_blob_t * |
| reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data) |
| { |
| CGFontRef cg_font = reinterpret_cast<CGFontRef> (user_data); |
| CFDataRef cf_data = CGFontCopyTableForTag (cg_font, tag); |
| if (unlikely (!cf_data)) |
| return NULL; |
| |
| const char *data = reinterpret_cast<const char*> (CFDataGetBytePtr (cf_data)); |
| const size_t length = CFDataGetLength (cf_data); |
| if (!data || !length) |
| return NULL; |
| |
| return hb_blob_create (data, length, HB_MEMORY_MODE_READONLY, |
| reinterpret_cast<void *> (const_cast<__CFData *> (cf_data)), |
| release_table_data); |
| } |
| |
| hb_face_t * |
| hb_coretext_face_create (CGFontRef cg_font) |
| { |
| return hb_face_create_for_tables (reference_table, CGFontRetain (cg_font), (hb_destroy_func_t) CGFontRelease); |
| } |
| |
| |
| HB_SHAPER_DATA_ENSURE_DECLARE(coretext, face) |
| HB_SHAPER_DATA_ENSURE_DECLARE(coretext, font) |
| |
| |
| /* |
| * shaper face data |
| */ |
| |
| struct hb_coretext_shaper_face_data_t { |
| CGFontRef cg_font; |
| }; |
| |
| static void |
| release_data (void *info, const void *data, size_t size) |
| { |
| assert (hb_blob_get_length ((hb_blob_t *) info) == size && |
| hb_blob_get_data ((hb_blob_t *) info, NULL) == data); |
| |
| hb_blob_destroy ((hb_blob_t *) info); |
| } |
| |
| hb_coretext_shaper_face_data_t * |
| _hb_coretext_shaper_face_data_create (hb_face_t *face) |
| { |
| hb_coretext_shaper_face_data_t *data = (hb_coretext_shaper_face_data_t *) calloc (1, sizeof (hb_coretext_shaper_face_data_t)); |
| if (unlikely (!data)) |
| return NULL; |
| |
| if (face->destroy == (hb_destroy_func_t) CGFontRelease) |
| { |
| data->cg_font = CGFontRetain ((CGFontRef) face->user_data); |
| } |
| else |
| { |
| hb_blob_t *blob = hb_face_reference_blob (face); |
| unsigned int blob_length; |
| const char *blob_data = hb_blob_get_data (blob, &blob_length); |
| if (unlikely (!blob_length)) |
| DEBUG_MSG (CORETEXT, face, "Face has empty blob"); |
| |
| CGDataProviderRef provider = CGDataProviderCreateWithData (blob, blob_data, blob_length, &release_data); |
| data->cg_font = CGFontCreateWithDataProvider (provider); |
| CGDataProviderRelease (provider); |
| } |
| |
| if (unlikely (!data->cg_font)) { |
| DEBUG_MSG (CORETEXT, face, "Face CGFontCreateWithDataProvider() failed"); |
| free (data); |
| return NULL; |
| } |
| |
| return data; |
| } |
| |
| void |
| _hb_coretext_shaper_face_data_destroy (hb_coretext_shaper_face_data_t *data) |
| { |
| CFRelease (data->cg_font); |
| free (data); |
| } |
| |
| CGFontRef |
| hb_coretext_face_get_cg_font (hb_face_t *face) |
| { |
| if (unlikely (!hb_coretext_shaper_face_data_ensure (face))) return NULL; |
| hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face); |
| return face_data->cg_font; |
| } |
| |
| |
| /* |
| * shaper font data |
| */ |
| |
| struct hb_coretext_shaper_font_data_t { |
| CTFontRef ct_font; |
| }; |
| |
| hb_coretext_shaper_font_data_t * |
| _hb_coretext_shaper_font_data_create (hb_font_t *font) |
| { |
| if (unlikely (!hb_coretext_shaper_face_data_ensure (font->face))) return NULL; |
| |
| hb_coretext_shaper_font_data_t *data = (hb_coretext_shaper_font_data_t *) calloc (1, sizeof (hb_coretext_shaper_font_data_t)); |
| if (unlikely (!data)) |
| return NULL; |
| |
| hb_face_t *face = font->face; |
| hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face); |
| |
| data->ct_font = CTFontCreateWithGraphicsFont (face_data->cg_font, font->y_scale, NULL, NULL); |
| if (unlikely (!data->ct_font)) { |
| DEBUG_MSG (CORETEXT, font, "Font CTFontCreateWithGraphicsFont() failed"); |
| free (data); |
| return NULL; |
| } |
| |
| return data; |
| } |
| |
| void |
| _hb_coretext_shaper_font_data_destroy (hb_coretext_shaper_font_data_t *data) |
| { |
| CFRelease (data->ct_font); |
| free (data); |
| } |
| |
| |
| /* |
| * shaper shape_plan data |
| */ |
| |
| struct hb_coretext_shaper_shape_plan_data_t {}; |
| |
| 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) |
| { |
| return (hb_coretext_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED; |
| } |
| |
| void |
| _hb_coretext_shaper_shape_plan_data_destroy (hb_coretext_shaper_shape_plan_data_t *data HB_UNUSED) |
| { |
| } |
| |
| CTFontRef |
| hb_coretext_font_get_ct_font (hb_font_t *font) |
| { |
| if (unlikely (!hb_coretext_shaper_font_data_ensure (font))) return NULL; |
| hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font); |
| return font_data->ct_font; |
| } |
| |
| |
| /* |
| * shaper |
| */ |
| |
| struct feature_record_t { |
| unsigned int feature; |
| unsigned int setting; |
| }; |
| |
| struct active_feature_t { |
| feature_record_t rec; |
| unsigned int order; |
| |
| static int cmp (const active_feature_t *a, const active_feature_t *b) { |
| return a->rec.feature < b->rec.feature ? -1 : a->rec.feature > b->rec.feature ? 1 : |
| a->order < b->order ? -1 : a->order > b->order ? 1 : |
| a->rec.setting < b->rec.setting ? -1 : a->rec.setting > b->rec.setting ? 1 : |
| 0; |
| } |
| bool operator== (const active_feature_t *f) { |
| return cmp (this, f) == 0; |
| } |
| }; |
| |
| struct feature_event_t { |
| unsigned int index; |
| bool start; |
| active_feature_t feature; |
| |
| static int cmp (const feature_event_t *a, const feature_event_t *b) { |
| return a->index < b->index ? -1 : a->index > b->index ? 1 : |
| a->start < b->start ? -1 : a->start > b->start ? 1 : |
| active_feature_t::cmp (&a->feature, &b->feature); |
| } |
| }; |
| |
| struct range_record_t { |
| CTFontRef font; |
| unsigned int index_first; /* == start */ |
| unsigned int index_last; /* == end - 1 */ |
| }; |
| |
| |
| /* The following enum members are added in OS X 10.8. */ |
| #define kAltHalfWidthTextSelector 6 |
| #define kAltProportionalTextSelector 5 |
| #define kAlternateHorizKanaOffSelector 1 |
| #define kAlternateHorizKanaOnSelector 0 |
| #define kAlternateKanaType 34 |
| #define kAlternateVertKanaOffSelector 3 |
| #define kAlternateVertKanaOnSelector 2 |
| #define kCaseSensitiveLayoutOffSelector 1 |
| #define kCaseSensitiveLayoutOnSelector 0 |
| #define kCaseSensitiveLayoutType 33 |
| #define kCaseSensitiveSpacingOffSelector 3 |
| #define kCaseSensitiveSpacingOnSelector 2 |
| #define kContextualAlternatesOffSelector 1 |
| #define kContextualAlternatesOnSelector 0 |
| #define kContextualAlternatesType 36 |
| #define kContextualLigaturesOffSelector 19 |
| #define kContextualLigaturesOnSelector 18 |
| #define kContextualSwashAlternatesOffSelector 5 |
| #define kContextualSwashAlternatesOnSelector 4 |
| #define kDefaultLowerCaseSelector 0 |
| #define kDefaultUpperCaseSelector 0 |
| #define kHistoricalLigaturesOffSelector 21 |
| #define kHistoricalLigaturesOnSelector 20 |
| #define kHojoCharactersSelector 12 |
| #define kJIS2004CharactersSelector 11 |
| #define kLowerCasePetiteCapsSelector 2 |
| #define kLowerCaseSmallCapsSelector 1 |
| #define kLowerCaseType 37 |
| #define kMathematicalGreekOffSelector 11 |
| #define kMathematicalGreekOnSelector 10 |
| #define kNLCCharactersSelector 13 |
| #define kQuarterWidthTextSelector 4 |
| #define kScientificInferiorsSelector 4 |
| #define kStylisticAltEightOffSelector 17 |
| #define kStylisticAltEightOnSelector 16 |
| #define kStylisticAltEighteenOffSelector 37 |
| #define kStylisticAltEighteenOnSelector 36 |
| #define kStylisticAltElevenOffSelector 23 |
| #define kStylisticAltElevenOnSelector 22 |
| #define kStylisticAltFifteenOffSelector 31 |
| #define kStylisticAltFifteenOnSelector 30 |
| #define kStylisticAltFiveOffSelector 11 |
| #define kStylisticAltFiveOnSelector 10 |
| #define kStylisticAltFourOffSelector 9 |
| #define kStylisticAltFourOnSelector 8 |
| #define kStylisticAltFourteenOffSelector 29 |
| #define kStylisticAltFourteenOnSelector 28 |
| #define kStylisticAltNineOffSelector 19 |
| #define kStylisticAltNineOnSelector 18 |
| #define kStylisticAltNineteenOffSelector 39 |
| #define kStylisticAltNineteenOnSelector 38 |
| #define kStylisticAltOneOffSelector 3 |
| #define kStylisticAltOneOnSelector 2 |
| #define kStylisticAltSevenOffSelector 15 |
| #define kStylisticAltSevenOnSelector 14 |
| #define kStylisticAltSeventeenOffSelector 35 |
| #define kStylisticAltSeventeenOnSelector 34 |
| #define kStylisticAltSixOffSelector 13 |
| #define kStylisticAltSixOnSelector 12 |
| #define kStylisticAltSixteenOffSelector 33 |
| #define kStylisticAltSixteenOnSelector 32 |
| #define kStylisticAltTenOffSelector 21 |
| #define kStylisticAltTenOnSelector 20 |
| #define kStylisticAltThirteenOffSelector 27 |
| #define kStylisticAltThirteenOnSelector 26 |
| #define kStylisticAltThreeOffSelector 7 |
| #define kStylisticAltThreeOnSelector 6 |
| #define kStylisticAltTwelveOffSelector 25 |
| #define kStylisticAltTwelveOnSelector 24 |
| #define kStylisticAltTwentyOffSelector 41 |
| #define kStylisticAltTwentyOnSelector 40 |
| #define kStylisticAltTwoOffSelector 5 |
| #define kStylisticAltTwoOnSelector 4 |
| #define kStylisticAlternativesType 35 |
| #define kSwashAlternatesOffSelector 3 |
| #define kSwashAlternatesOnSelector 2 |
| #define kThirdWidthTextSelector 3 |
| #define kTraditionalNamesCharactersSelector 14 |
| #define kUpperCasePetiteCapsSelector 2 |
| #define kUpperCaseSmallCapsSelector 1 |
| #define kUpperCaseType 38 |
| |
| /* Table data courtesy of Apple. */ |
| struct feature_mapping_t { |
| FourCharCode otFeatureTag; |
| uint16_t aatFeatureType; |
| uint16_t selectorToEnable; |
| uint16_t selectorToDisable; |
| } feature_mappings[] = { |
| { 'c2pc', kUpperCaseType, kUpperCasePetiteCapsSelector, kDefaultUpperCaseSelector }, |
| { 'c2sc', kUpperCaseType, kUpperCaseSmallCapsSelector, kDefaultUpperCaseSelector }, |
| { 'calt', kContextualAlternatesType, kContextualAlternatesOnSelector, kContextualAlternatesOffSelector }, |
| { 'case', kCaseSensitiveLayoutType, kCaseSensitiveLayoutOnSelector, kCaseSensitiveLayoutOffSelector }, |
| { 'clig', kLigaturesType, kContextualLigaturesOnSelector, kContextualLigaturesOffSelector }, |
| { 'cpsp', kCaseSensitiveLayoutType, kCaseSensitiveSpacingOnSelector, kCaseSensitiveSpacingOffSelector }, |
| { 'cswh', kContextualAlternatesType, kContextualSwashAlternatesOnSelector, kContextualSwashAlternatesOffSelector }, |
| { 'dlig', kLigaturesType, kRareLigaturesOnSelector, kRareLigaturesOffSelector }, |
| { 'expt', kCharacterShapeType, kExpertCharactersSelector, 16 }, |
| { 'frac', kFractionsType, kDiagonalFractionsSelector, kNoFractionsSelector }, |
| { 'fwid', kTextSpacingType, kMonospacedTextSelector, 7 }, |
| { 'halt', kTextSpacingType, kAltHalfWidthTextSelector, 7 }, |
| { 'hist', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector }, |
| { 'hkna', kAlternateKanaType, kAlternateHorizKanaOnSelector, kAlternateHorizKanaOffSelector, }, |
| { 'hlig', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector }, |
| { 'hngl', kTransliterationType, kHanjaToHangulSelector, kNoTransliterationSelector }, |
| { 'hojo', kCharacterShapeType, kHojoCharactersSelector, 16 }, |
| { 'hwid', kTextSpacingType, kHalfWidthTextSelector, 7 }, |
| { 'ital', kItalicCJKRomanType, kCJKItalicRomanOnSelector, kCJKItalicRomanOffSelector }, |
| { 'jp04', kCharacterShapeType, kJIS2004CharactersSelector, 16 }, |
| { 'jp78', kCharacterShapeType, kJIS1978CharactersSelector, 16 }, |
| { 'jp83', kCharacterShapeType, kJIS1983CharactersSelector, 16 }, |
| { 'jp90', kCharacterShapeType, kJIS1990CharactersSelector, 16 }, |
| { 'liga', kLigaturesType, kCommonLigaturesOnSelector, kCommonLigaturesOffSelector }, |
| { 'lnum', kNumberCaseType, kUpperCaseNumbersSelector, 2 }, |
| { 'mgrk', kMathematicalExtrasType, kMathematicalGreekOnSelector, kMathematicalGreekOffSelector }, |
| { 'nlck', kCharacterShapeType, kNLCCharactersSelector, 16 }, |
| { 'onum', kNumberCaseType, kLowerCaseNumbersSelector, 2 }, |
| { 'ordn', kVerticalPositionType, kOrdinalsSelector, kNormalPositionSelector }, |
| { 'palt', kTextSpacingType, kAltProportionalTextSelector, 7 }, |
| { 'pcap', kLowerCaseType, kLowerCasePetiteCapsSelector, kDefaultLowerCaseSelector }, |
| { 'pkna', kTextSpacingType, kProportionalTextSelector, 7 }, |
| { 'pnum', kNumberSpacingType, kProportionalNumbersSelector, 4 }, |
| { 'pwid', kTextSpacingType, kProportionalTextSelector, 7 }, |
| { 'qwid', kTextSpacingType, kQuarterWidthTextSelector, 7 }, |
| { 'ruby', kRubyKanaType, kRubyKanaOnSelector, kRubyKanaOffSelector }, |
| { 'sinf', kVerticalPositionType, kScientificInferiorsSelector, kNormalPositionSelector }, |
| { 'smcp', kLowerCaseType, kLowerCaseSmallCapsSelector, kDefaultLowerCaseSelector }, |
| { 'smpl', kCharacterShapeType, kSimplifiedCharactersSelector, 16 }, |
| { 'ss01', kStylisticAlternativesType, kStylisticAltOneOnSelector, kStylisticAltOneOffSelector }, |
| { 'ss02', kStylisticAlternativesType, kStylisticAltTwoOnSelector, kStylisticAltTwoOffSelector }, |
| { 'ss03', kStylisticAlternativesType, kStylisticAltThreeOnSelector, kStylisticAltThreeOffSelector }, |
| { 'ss04', kStylisticAlternativesType, kStylisticAltFourOnSelector, kStylisticAltFourOffSelector }, |
| { 'ss05', kStylisticAlternativesType, kStylisticAltFiveOnSelector, kStylisticAltFiveOffSelector }, |
| { 'ss06', kStylisticAlternativesType, kStylisticAltSixOnSelector, kStylisticAltSixOffSelector }, |
| { 'ss07', kStylisticAlternativesType, kStylisticAltSevenOnSelector, kStylisticAltSevenOffSelector }, |
| { 'ss08', kStylisticAlternativesType, kStylisticAltEightOnSelector, kStylisticAltEightOffSelector }, |
| { 'ss09', kStylisticAlternativesType, kStylisticAltNineOnSelector, kStylisticAltNineOffSelector }, |
| { 'ss10', kStylisticAlternativesType, kStylisticAltTenOnSelector, kStylisticAltTenOffSelector }, |
| { 'ss11', kStylisticAlternativesType, kStylisticAltElevenOnSelector, kStylisticAltElevenOffSelector }, |
| { 'ss12', kStylisticAlternativesType, kStylisticAltTwelveOnSelector, kStylisticAltTwelveOffSelector }, |
| { 'ss13', kStylisticAlternativesType, kStylisticAltThirteenOnSelector, kStylisticAltThirteenOffSelector }, |
| { 'ss14', kStylisticAlternativesType, kStylisticAltFourteenOnSelector, kStylisticAltFourteenOffSelector }, |
| { 'ss15', kStylisticAlternativesType, kStylisticAltFifteenOnSelector, kStylisticAltFifteenOffSelector }, |
| { 'ss16', kStylisticAlternativesType, kStylisticAltSixteenOnSelector, kStylisticAltSixteenOffSelector }, |
| { 'ss17', kStylisticAlternativesType, kStylisticAltSeventeenOnSelector, kStylisticAltSeventeenOffSelector }, |
| { 'ss18', kStylisticAlternativesType, kStylisticAltEighteenOnSelector, kStylisticAltEighteenOffSelector }, |
| { 'ss19', kStylisticAlternativesType, kStylisticAltNineteenOnSelector, kStylisticAltNineteenOffSelector }, |
| { 'ss20', kStylisticAlternativesType, kStylisticAltTwentyOnSelector, kStylisticAltTwentyOffSelector }, |
| { 'subs', kVerticalPositionType, kInferiorsSelector, kNormalPositionSelector }, |
| { 'sups', kVerticalPositionType, kSuperiorsSelector, kNormalPositionSelector }, |
| { 'swsh', kContextualAlternatesType, kSwashAlternatesOnSelector, kSwashAlternatesOffSelector }, |
| { 'titl', kStyleOptionsType, kTitlingCapsSelector, kNoStyleOptionsSelector }, |
| { 'tnam', kCharacterShapeType, kTraditionalNamesCharactersSelector, 16 }, |
| { 'tnum', kNumberSpacingType, kMonospacedNumbersSelector, 4 }, |
| { 'trad', kCharacterShapeType, kTraditionalCharactersSelector, 16 }, |
| { 'twid', kTextSpacingType, kThirdWidthTextSelector, 7 }, |
| { 'unic', kLetterCaseType, 14, 15 }, |
| { 'valt', kTextSpacingType, kAltProportionalTextSelector, 7 }, |
| { 'vert', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector }, |
| { 'vhal', kTextSpacingType, kAltHalfWidthTextSelector, 7 }, |
| { 'vkna', kAlternateKanaType, kAlternateVertKanaOnSelector, kAlternateVertKanaOffSelector }, |
| { 'vpal', kTextSpacingType, kAltProportionalTextSelector, 7 }, |
| { 'vrt2', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector }, |
| { 'zero', kTypographicExtrasType, kSlashedZeroOnSelector, kSlashedZeroOffSelector }, |
| }; |
| |
| static int |
| _hb_feature_mapping_cmp (const void *key_, const void *entry_) |
| { |
| unsigned int key = * (unsigned int *) key_; |
| const feature_mapping_t * entry = (const feature_mapping_t *) entry_; |
| return key < entry->otFeatureTag ? -1 : |
| key > entry->otFeatureTag ? 1 : |
| 0; |
| } |
| |
| 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) |
| { |
| hb_face_t *face = font->face; |
| hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face); |
| hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font); |
| |
| /* |
| * Set up features. |
| * (copied + modified from code from hb-uniscribe.cc) |
| */ |
| hb_auto_array_t<feature_record_t> feature_records; |
| hb_auto_array_t<range_record_t> range_records; |
| if (num_features) |
| { |
| /* Sort features by start/end events. */ |
| hb_auto_array_t<feature_event_t> feature_events; |
| for (unsigned int i = 0; i < num_features; i++) |
| { |
| const feature_mapping_t * mapping = (const feature_mapping_t *) bsearch (&features[i].tag, |
| feature_mappings, |
| ARRAY_LENGTH (feature_mappings), |
| sizeof (feature_mappings[0]), |
| _hb_feature_mapping_cmp); |
| if (!mapping) |
| continue; |
| |
| active_feature_t feature; |
| feature.rec.feature = mapping->aatFeatureType; |
| feature.rec.setting = features[i].value ? mapping->selectorToEnable : mapping->selectorToDisable; |
| feature.order = i; |
| |
| feature_event_t *event; |
| |
| event = feature_events.push (); |
| if (unlikely (!event)) |
| goto fail_features; |
| event->index = features[i].start; |
| event->start = true; |
| event->feature = feature; |
| |
| event = feature_events.push (); |
| if (unlikely (!event)) |
| goto fail_features; |
| event->index = features[i].end; |
| event->start = false; |
| event->feature = feature; |
| } |
| feature_events.sort (); |
| /* Add a strategic final event. */ |
| { |
| active_feature_t feature; |
| feature.rec.feature = HB_TAG_NONE; |
| feature.rec.setting = 0; |
| feature.order = num_features + 1; |
| |
| feature_event_t *event = feature_events.push (); |
| if (unlikely (!event)) |
| goto fail_features; |
| event->index = 0; /* This value does magic. */ |
| event->start = false; |
| event->feature = feature; |
| } |
| |
| /* Scan events and save features for each range. */ |
| hb_auto_array_t<active_feature_t> active_features; |
| unsigned int last_index = 0; |
| for (unsigned int i = 0; i < feature_events.len; i++) |
| { |
| feature_event_t *event = &feature_events[i]; |
| |
| if (event->index != last_index) |
| { |
| /* Save a snapshot of active features and the range. */ |
| range_record_t *range = range_records.push (); |
| if (unlikely (!range)) |
| goto fail_features; |
| |
| if (active_features.len) |
| { |
| CFMutableArrayRef features_array = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks); |
| |
| /* TODO sort and resolve conflicting features? */ |
| /* active_features.sort (); */ |
| for (unsigned int j = 0; j < active_features.len; j++) |
| { |
| CFStringRef keys[2] = { |
| kCTFontFeatureTypeIdentifierKey, |
| kCTFontFeatureSelectorIdentifierKey |
| }; |
| CFNumberRef values[2] = { |
| CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.feature), |
| CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.setting) |
| }; |
| CFDictionaryRef dict = CFDictionaryCreate (kCFAllocatorDefault, |
| (const void **) keys, |
| (const void **) values, |
| 2, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks); |
| CFRelease (values[0]); |
| CFRelease (values[1]); |
| |
| CFArrayAppendValue (features_array, dict); |
| CFRelease (dict); |
| |
| } |
| |
| CFDictionaryRef attributes = CFDictionaryCreate (kCFAllocatorDefault, |
| (const void **) &kCTFontFeatureSettingsAttribute, |
| (const void **) &features_array, |
| 1, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks); |
| CFRelease (features_array); |
| |
| CTFontDescriptorRef font_desc = CTFontDescriptorCreateWithAttributes (attributes); |
| CFRelease (attributes); |
| |
| range->font = CTFontCreateCopyWithAttributes (font_data->ct_font, 0.0, NULL, font_desc); |
| |
| CFRelease (font_desc); |
| } |
| else |
| { |
| range->font = NULL; |
| } |
| |
| range->index_first = last_index; |
| range->index_last = event->index - 1; |
| |
| last_index = event->index; |
| } |
| |
| if (event->start) { |
| active_feature_t *feature = active_features.push (); |
| if (unlikely (!feature)) |
| goto fail_features; |
| *feature = event->feature; |
| } else { |
| active_feature_t *feature = active_features.find (&event->feature); |
| if (feature) |
| active_features.remove (feature - active_features.array); |
| } |
| } |
| |
| if (!range_records.len) /* No active feature found. */ |
| goto fail_features; |
| } |
| else |
| { |
| fail_features: |
| num_features = 0; |
| } |
| |
| #define FAIL(...) \ |
| HB_STMT_START { \ |
| DEBUG_MSG (CORETEXT, NULL, __VA_ARGS__); \ |
| return false; \ |
| } HB_STMT_END; |
| |
| unsigned int scratch_size; |
| hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size); |
| |
| #define ALLOCATE_ARRAY(Type, name, len) \ |
| Type *name = (Type *) scratch; \ |
| { \ |
| unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \ |
| assert (_consumed <= scratch_size); \ |
| scratch += _consumed; \ |
| scratch_size -= _consumed; \ |
| } |
| |
| #define utf16_index() var1.u32 |
| |
| ALLOCATE_ARRAY (UniChar, pchars, buffer->len * 2); |
| |
| unsigned int chars_len = 0; |
| for (unsigned int i = 0; i < buffer->len; i++) { |
| hb_codepoint_t c = buffer->info[i].codepoint; |
| buffer->info[i].utf16_index() = chars_len; |
| if (likely (c < 0x10000)) |
| pchars[chars_len++] = c; |
| else if (unlikely (c >= 0x110000)) |
| pchars[chars_len++] = 0xFFFD; |
| else { |
| pchars[chars_len++] = 0xD800 + ((c - 0x10000) >> 10); |
| pchars[chars_len++] = 0xDC00 + ((c - 0x10000) & ((1 << 10) - 1)); |
| } |
| } |
| |
| #undef utf16_index |
| |
| CFStringRef string_ref = CFStringCreateWithCharactersNoCopy (NULL, |
| pchars, chars_len, |
| kCFAllocatorNull); |
| |
| CFMutableAttributedStringRef attr_string = CFAttributedStringCreateMutable (NULL, chars_len); |
| CFAttributedStringReplaceString (attr_string, CFRangeMake (0, 0), string_ref); |
| CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len), |
| kCTFontAttributeName, font_data->ct_font); |
| |
| if (num_features) |
| { |
| ALLOCATE_ARRAY (unsigned int, log_clusters, chars_len); |
| |
| /* Need log_clusters to assign features. */ |
| chars_len = 0; |
| for (unsigned int i = 0; i < buffer->len; i++) |
| { |
| hb_codepoint_t c = buffer->info[i].codepoint; |
| unsigned int cluster = buffer->info[i].cluster; |
| log_clusters[chars_len++] = cluster; |
| if (c >= 0x10000 && c < 0x110000) |
| log_clusters[chars_len++] = cluster; /* Surrogates. */ |
| } |
| |
| unsigned int start = 0; |
| range_record_t *last_range = &range_records[0]; |
| for (unsigned int k = 0; k < chars_len; k++) |
| { |
| range_record_t *range = last_range; |
| while (log_clusters[k] < range->index_first) |
| range--; |
| while (log_clusters[k] > range->index_last) |
| range++; |
| if (range != last_range) |
| { |
| if (last_range->font) |
| CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, k - start), |
| kCTFontAttributeName, last_range->font); |
| |
| start = k; |
| } |
| |
| last_range = range; |
| } |
| if (start != chars_len && last_range->font) |
| CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, chars_len - start - 1), |
| kCTFontAttributeName, last_range->font); |
| |
| for (unsigned int i = 0; i < range_records.len; i++) |
| if (range_records[i].font) |
| CFRelease (range_records[i].font); |
| } |
| |
| CTLineRef line = CTLineCreateWithAttributedString (attr_string); |
| CFRelease (attr_string); |
| |
| CFArrayRef glyph_runs = CTLineGetGlyphRuns (line); |
| unsigned int num_runs = CFArrayGetCount (glyph_runs); |
| |
| buffer->len = 0; |
| |
| const CFRange range_all = CFRangeMake (0, 0); |
| |
| for (unsigned int i = 0; i < num_runs; i++) |
| { |
| CTRunRef run = (CTRunRef) CFArrayGetValueAtIndex (glyph_runs, i); |
| |
| /* CoreText does automatic font fallback (AKA "cascading") for characters |
| * not supported by the requested font, and provides no way to turn it off, |
| * so we detect if the returned run uses a font other than the requested |
| * one and fill in the buffer with .notdef glyphs instead of random glyph |
| * indices from a different font. |
| */ |
| CFDictionaryRef attributes = CTRunGetAttributes (run); |
| CTFontRef run_ct_font = static_cast<CTFontRef>(CFDictionaryGetValue (attributes, kCTFontAttributeName)); |
| CGFontRef run_cg_font = CTFontCopyGraphicsFont (run_ct_font, 0); |
| if (!CFEqual (run_cg_font, face_data->cg_font)) |
| { |
| CFRelease (run_cg_font); |
| |
| CFRange range = CTRunGetStringRange (run); |
| buffer->ensure (buffer->len + range.length); |
| if (buffer->in_error) |
| FAIL ("Buffer resize failed"); |
| hb_glyph_info_t *info = buffer->info + buffer->len; |
| |
| CGGlyph notdef = 0; |
| double advance = CTFontGetAdvancesForGlyphs (font_data->ct_font, kCTFontHorizontalOrientation, ¬def, NULL, 1); |
| |
| for (CFIndex j = range.location; j < range.location + range.length; j++) |
| { |
| UniChar ch = CFStringGetCharacterAtIndex (string_ref, j); |
| if (hb_in_range<UniChar> (ch, 0xDC00, 0xDFFF) && range.location < j) |
| { |
| ch = CFStringGetCharacterAtIndex (string_ref, j - 1); |
| if (hb_in_range<UniChar> (ch, 0xD800, 0xDBFF)) |
| /* This is the second of a surrogate pair. Don't need .notdef |
| * for this one. */ |
| continue; |
| } |
| |
| info->codepoint = notdef; |
| /* TODO We have to fixup clusters later. See vis_clusters in |
| * hb-uniscribe.cc for example. */ |
| info->cluster = j; |
| |
| info->mask = advance; |
| info->var1.u32 = 0; |
| info->var2.u32 = 0; |
| |
| info++; |
| buffer->len++; |
| } |
| continue; |
| } |
| CFRelease (run_cg_font); |
| |
| unsigned int num_glyphs = CTRunGetGlyphCount (run); |
| if (num_glyphs == 0) |
| continue; |
| |
| buffer->ensure (buffer->len + num_glyphs); |
| |
| scratch = buffer->get_scratch_buffer (&scratch_size); |
| |
| /* Testing indicates that CTRunGetGlyphsPtr, etc (almost?) always |
| * succeed, and so copying data to our own buffer will be rare. */ |
| |
| const CGGlyph* glyphs = CTRunGetGlyphsPtr (run); |
| if (!glyphs) { |
| ALLOCATE_ARRAY (CGGlyph, glyph_buf, num_glyphs); |
| CTRunGetGlyphs (run, range_all, glyph_buf); |
| glyphs = glyph_buf; |
| } |
| |
| const CGPoint* positions = CTRunGetPositionsPtr (run); |
| if (!positions) { |
| ALLOCATE_ARRAY (CGPoint, position_buf, num_glyphs); |
| CTRunGetPositions (run, range_all, position_buf); |
| positions = position_buf; |
| } |
| |
| const CFIndex* string_indices = CTRunGetStringIndicesPtr (run); |
| if (!string_indices) { |
| ALLOCATE_ARRAY (CFIndex, index_buf, num_glyphs); |
| CTRunGetStringIndices (run, range_all, index_buf); |
| string_indices = index_buf; |
| } |
| |
| #undef ALLOCATE_ARRAY |
| |
| double run_width = CTRunGetTypographicBounds (run, range_all, NULL, NULL, NULL); |
| |
| for (unsigned int j = 0; j < num_glyphs; j++) { |
| double advance = (j + 1 < num_glyphs ? positions[j + 1].x : positions[0].x + run_width) - positions[j].x; |
| |
| hb_glyph_info_t *info = &buffer->info[buffer->len]; |
| |
| info->codepoint = glyphs[j]; |
| info->cluster = string_indices[j]; |
| |
| /* Currently, we do all x-positioning by setting the advance, we never use x-offset. */ |
| info->mask = advance; |
| info->var1.u32 = 0; |
| info->var2.u32 = positions[j].y; |
| |
| buffer->len++; |
| } |
| } |
| |
| buffer->clear_positions (); |
| |
| unsigned int count = buffer->len; |
| for (unsigned int i = 0; i < count; ++i) { |
| hb_glyph_info_t *info = &buffer->info[i]; |
| hb_glyph_position_t *pos = &buffer->pos[i]; |
| |
| /* TODO vertical */ |
| pos->x_advance = info->mask; |
| pos->x_offset = info->var1.u32; |
| pos->y_offset = info->var2.u32; |
| } |
| |
| /* Fix up clusters so that we never return out-of-order indices; |
| * if core text has reordered glyphs, we'll merge them to the |
| * beginning of the reordered cluster. |
| * |
| * This does *not* mean we'll form the same clusters as Uniscribe |
| * or the native OT backend, only that the cluster indices will be |
| * monotonic in the output buffer. */ |
| if (HB_DIRECTION_IS_FORWARD (buffer->props.direction)) { |
| unsigned int prev_cluster = 0; |
| for (unsigned int i = 0; i < count; i++) { |
| unsigned int curr_cluster = buffer->info[i].cluster; |
| if (curr_cluster < prev_cluster) { |
| for (unsigned int j = i; j > 0; j--) { |
| if (buffer->info[j - 1].cluster > curr_cluster) |
| buffer->info[j - 1].cluster = curr_cluster; |
| else |
| break; |
| } |
| } |
| prev_cluster = curr_cluster; |
| } |
| } else { |
| unsigned int prev_cluster = (unsigned int)-1; |
| for (unsigned int i = 0; i < count; i++) { |
| unsigned int curr_cluster = buffer->info[i].cluster; |
| if (curr_cluster > prev_cluster) { |
| for (unsigned int j = i; j > 0; j--) { |
| if (buffer->info[j - 1].cluster < curr_cluster) |
| buffer->info[j - 1].cluster = curr_cluster; |
| else |
| break; |
| } |
| } |
| prev_cluster = curr_cluster; |
| } |
| } |
| |
| CFRelease (string_ref); |
| CFRelease (line); |
| |
| return true; |
| } |
| |
| |
| /* |
| * AAT shaper |
| */ |
| |
| HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, face) |
| HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, font) |
| |
| |
| /* |
| * shaper face data |
| */ |
| |
| struct hb_coretext_aat_shaper_face_data_t {}; |
| |
| hb_coretext_aat_shaper_face_data_t * |
| _hb_coretext_aat_shaper_face_data_create (hb_face_t *face) |
| { |
| hb_blob_t *mort_blob = face->reference_table (HB_CORETEXT_TAG_MORT); |
| /* Umm, we just reference the table to check whether it exists. |
| * Maybe add better API for this? */ |
| if (!hb_blob_get_length (mort_blob)) |
| { |
| hb_blob_destroy (mort_blob); |
| mort_blob = face->reference_table (HB_CORETEXT_TAG_MORX); |
| if (!hb_blob_get_length (mort_blob)) |
| { |
| hb_blob_destroy (mort_blob); |
| return NULL; |
| } |
| } |
| hb_blob_destroy (mort_blob); |
| |
| return hb_coretext_shaper_face_data_ensure (face) ? (hb_coretext_aat_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL; |
| } |
| |
| void |
| _hb_coretext_aat_shaper_face_data_destroy (hb_coretext_aat_shaper_face_data_t *data HB_UNUSED) |
| { |
| } |
| |
| |
| /* |
| * shaper font data |
| */ |
| |
| struct hb_coretext_aat_shaper_font_data_t {}; |
| |
| hb_coretext_aat_shaper_font_data_t * |
| _hb_coretext_aat_shaper_font_data_create (hb_font_t *font) |
| { |
| return hb_coretext_shaper_font_data_ensure (font) ? (hb_coretext_aat_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL; |
| } |
| |
| void |
| _hb_coretext_aat_shaper_font_data_destroy (hb_coretext_aat_shaper_font_data_t *data HB_UNUSED) |
| { |
| } |
| |
| |
| /* |
| * shaper shape_plan data |
| */ |
| |
| struct hb_coretext_aat_shaper_shape_plan_data_t {}; |
| |
| 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) |
| { |
| return (hb_coretext_aat_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED; |
| } |
| |
| void |
| _hb_coretext_aat_shaper_shape_plan_data_destroy (hb_coretext_aat_shaper_shape_plan_data_t *data HB_UNUSED) |
| { |
| } |
| |
| |
| /* |
| * shaper |
| */ |
| |
| 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) |
| { |
| return _hb_coretext_shape (shape_plan, font, buffer, features, num_features); |
| } |
