src/hb-coretext.cc | 446 ++++++++++++++++++++++++++++++++++++++++++++++------ src/hb-uniscribe.cc | 2 2 files changed, 404 insertions(+), 44 deletions(-)
New commits: commit 3613696b57225111507a3f4263f5fa6937d0bc72 Author: Behdad Esfahbod <[email protected]> Date: Mon Aug 12 00:33:28 2013 -0400 [coretext] Fully support user features Based on patch from Jonathan Kew and data from Apple. It's not working correctly though, and I suspect I'm hitting a bug in CoreText. When I do this: hb-shape /Library/Fonts/Zapfino.ttf ZapfinoZapfino --shaper coretext \ --features=-liga I expect both ligatures to turn off, but only the second one does: [Z_a_p_f_i_n_o=0+2333|Z=7+395|a=8+285|p_f=9+433|i=11+181|n=12+261|o=13+250] whereas if I disable 'dlig' instead of 'liga', both are turned off. Smells... Doesn't resolve conflicting feature settings. diff --git a/src/hb-coretext.cc b/src/hb-coretext.cc index 269bfdb..f780973 100644 --- a/src/hb-coretext.cc +++ b/src/hb-coretext.cc @@ -1,6 +1,6 @@ /* - * Copyright © 2012 Mozilla Foundation. - * Copyright © 2012 Google, Inc. + * Copyright © 2012,2013 Mozilla Foundation. + * Copyright © 2012,2013 Google, Inc. * * This is part of HarfBuzz, a text shaping library. * @@ -170,6 +170,222 @@ hb_coretext_font_get_ct_font (hb_font_t *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, @@ -180,6 +396,156 @@ _hb_coretext_shape (hb_shape_plan_t *shape_plan, 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_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; + + 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__); \ @@ -205,20 +571,6 @@ _hb_coretext_shape (hb_shape_plan_t *shape_plan, pchars[chars_len++] = 0xDC00 + ((c - 0x10000) & ((1 << 10) - 1)); } } - unsigned int *log_clusters = (unsigned int *) (pchars + chars_len); - if (num_features) - { - /* 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. */ - } - } #undef utf16_index @@ -232,40 +584,48 @@ _hb_coretext_shape (hb_shape_plan_t *shape_plan, CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len), kCTFontAttributeName, font_data->ct_font); - for (unsigned int i = 0; i < num_features; i++) + if (num_features) { - CFStringRef a = NULL; - unsigned int v = features[i].value; + unsigned int *log_clusters = (unsigned int *) (pchars + chars_len); - switch (features[i].tag) + /* Need log_clusters to assign features. */ + chars_len = 0; + for (unsigned int i = 0; i < buffer->len; i++) { - case HB_TAG ('l','i','g','a'): a = kCTLigatureAttributeName; v = v ? 1 : 0; break; - case HB_TAG ('d','l','i','g'): a = kCTLigatureAttributeName; v = v ? 2 : 1; break; - - case HB_TAG ('e','x','p','t'): a = kCTCharacterShapeAttributeName; v = v ? 11 : 16; break; - case HB_TAG ('j','s','7','8'): a = kCTCharacterShapeAttributeName; v = v ? 3 : 16; break; - case HB_TAG ('j','s','8','3'): a = kCTCharacterShapeAttributeName; v = v ? 4 : 16; break; - case HB_TAG ('j','s','9','0'): a = kCTCharacterShapeAttributeName; v = v ? 5 : 16; break; - case HB_TAG ('s','m','p','l'): a = kCTCharacterShapeAttributeName; v = v ? 2 : 16; break; - case HB_TAG ('t','r','a','d'): a = kCTCharacterShapeAttributeName; v = v ? 1 : 16; break; + 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. */ } - if (!a) - continue; - - CFTypeRef vref = CFNumberCreate (NULL, kCFNumberIntType, &v); - unsigned int start = features[i].start; - unsigned int end = features[i].end; - for (unsigned int j = 0; j < chars_len; j++) + unsigned int start = 0; + range_record_t *last_range = &range_records[0]; + for (unsigned int k = 0; k < chars_len; k++) { - if (log_clusters[j] < start || log_clusters[j] >= end) - continue; - unsigned int range_start = j; - while (j < chars_len && log_clusters[j] >= start && log_clusters[j] < end) - j++; - CFAttributedStringSetAttribute (attr_string, CFRangeMake (range_start, j - range_start), a, vref); + 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; } - CFRelease (vref); + 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); diff --git a/src/hb-uniscribe.cc b/src/hb-uniscribe.cc index 6e36e4e..e229a40 100644 --- a/src/hb-uniscribe.cc +++ b/src/hb-uniscribe.cc @@ -1,5 +1,5 @@ /* - * Copyright © 2011,2012 Google, Inc. + * Copyright © 2011,2012,2013 Google, Inc. * * This is part of HarfBuzz, a text shaping library. *
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