/* * 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 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; 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_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_records; hb_auto_array_t range_records; if (num_features) { /* Sort features by start/end events. */ hb_auto_array_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_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; unsigned int offset = feature_records.len; 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; char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size); #define utf16_index() var1.u32 UniChar *pchars = (UniChar *) scratch; 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); CFRelease (string_ref); CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len), kCTFontAttributeName, font_data->ct_font); if (num_features) { unsigned int *log_clusters = (unsigned int *) (pchars + 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); unsigned int num_glyphs = CTRunGetGlyphCount (run); if (num_glyphs == 0) continue; buffer->ensure (buffer->len + num_glyphs); /* Testing indicates that CTRunGetGlyphsPtr (almost?) always succeeds, * and so copying data to our own buffer with CTRunGetGlyphs will be * extremely rare. */ unsigned int scratch_size; char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size); #define ALLOCATE_ARRAY(Type, name, len) \ Type *name = (Type *) scratch; \ scratch += (len) * sizeof ((name)[0]); \ scratch_size -= (len) * sizeof ((name)[0]); 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 (line); return true; }