1 /* 2 * Copyright 2017 Google, Inc. 3 * Copyright 2018 Ebrahim Byagowi 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 * Google Author(s): Behdad Esfahbod 26 */ 27 28 #include "hb-open-type.hh" 29 30 #include "hb-ot-face.hh" 31 #include "hb-aat-layout.hh" 32 #include "hb-aat-fdsc-table.hh" // Just so we compile it; unused otherwise. 33 #include "hb-aat-layout-ankr-table.hh" 34 #include "hb-aat-layout-bsln-table.hh" // Just so we compile it; unused otherwise. 35 #include "hb-aat-layout-feat-table.hh" 36 #include "hb-aat-layout-just-table.hh" // Just so we compile it; unused otherwise. 37 #include "hb-aat-layout-kerx-table.hh" 38 #include "hb-aat-layout-morx-table.hh" 39 #include "hb-aat-layout-trak-table.hh" 40 #include "hb-aat-ltag-table.hh" 41 42 43 /** 44 * SECTION:hb-aat-layout 45 * @title: hb-aat-layout 46 * @short_description: Apple Advanced Typography Layout 47 * @include: hb-aat.h 48 * 49 * Functions for querying OpenType Layout features in the font face. 50 **/ 51 52 53 /* Table data courtesy of Apple. Converted from mnemonics to integers 54 * when moving to this file. */ 55 static const hb_aat_feature_mapping_t feature_mappings[] = 56 { 57 {HB_TAG ('a','f','r','c'), HB_AAT_LAYOUT_FEATURE_TYPE_FRACTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_VERTICAL_FRACTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NO_FRACTIONS}, 58 {HB_TAG ('c','2','p','c'), HB_AAT_LAYOUT_FEATURE_TYPE_UPPER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_UPPER_CASE_PETITE_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DEFAULT_UPPER_CASE}, 59 {HB_TAG ('c','2','s','c'), HB_AAT_LAYOUT_FEATURE_TYPE_UPPER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_UPPER_CASE_SMALL_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DEFAULT_UPPER_CASE}, 60 {HB_TAG ('c','a','l','t'), HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_ALTERNATES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_ALTERNATES_OFF}, 61 {HB_TAG ('c','a','s','e'), HB_AAT_LAYOUT_FEATURE_TYPE_CASE_SENSITIVE_LAYOUT, HB_AAT_LAYOUT_FEATURE_SELECTOR_CASE_SENSITIVE_LAYOUT_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CASE_SENSITIVE_LAYOUT_OFF}, 62 {HB_TAG ('c','l','i','g'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_LIGATURES_OFF}, 63 {HB_TAG ('c','p','s','p'), HB_AAT_LAYOUT_FEATURE_TYPE_CASE_SENSITIVE_LAYOUT, HB_AAT_LAYOUT_FEATURE_SELECTOR_CASE_SENSITIVE_SPACING_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CASE_SENSITIVE_SPACING_OFF}, 64 {HB_TAG ('c','s','w','h'), HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_SWASH_ALTERNATES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_SWASH_ALTERNATES_OFF}, 65 {HB_TAG ('d','l','i','g'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_RARE_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_RARE_LIGATURES_OFF}, 66 {HB_TAG ('e','x','p','t'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_EXPERT_CHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 67 {HB_TAG ('f','r','a','c'), HB_AAT_LAYOUT_FEATURE_TYPE_FRACTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DIAGONAL_FRACTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NO_FRACTIONS}, 68 {HB_TAG ('f','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_MONOSPACED_TEXT, (hb_aat_layout_feature_selector_t) 7}, 69 {HB_TAG ('h','a','l','t'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_HALF_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7}, 70 {HB_TAG ('h','i','s','t'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_HISTORICAL_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_HISTORICAL_LIGATURES_OFF}, 71 {HB_TAG ('h','k','n','a'), HB_AAT_LAYOUT_FEATURE_TYPE_ALTERNATE_KANA, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALTERNATE_HORIZ_KANA_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALTERNATE_HORIZ_KANA_OFF}, 72 {HB_TAG ('h','l','i','g'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_HISTORICAL_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_HISTORICAL_LIGATURES_OFF}, 73 {HB_TAG ('h','n','g','l'), HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION, HB_AAT_LAYOUT_FEATURE_SELECTOR_HANJA_TO_HANGUL, HB_AAT_LAYOUT_FEATURE_SELECTOR_NO_TRANSLITERATION}, 74 {HB_TAG ('h','o','j','o'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_HOJO_CHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 75 {HB_TAG ('h','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_HALF_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7}, 76 {HB_TAG ('i','t','a','l'), HB_AAT_LAYOUT_FEATURE_TYPE_ITALIC_CJK_ROMAN, HB_AAT_LAYOUT_FEATURE_SELECTOR_CJK_ITALIC_ROMAN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CJK_ITALIC_ROMAN_OFF}, 77 {HB_TAG ('j','p','0','4'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_JIS2004_CHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 78 {HB_TAG ('j','p','7','8'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_JIS1978_CHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 79 {HB_TAG ('j','p','8','3'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_JIS1983_CHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 80 {HB_TAG ('j','p','9','0'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_JIS1990_CHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 81 {HB_TAG ('l','i','g','a'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_COMMON_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_COMMON_LIGATURES_OFF}, 82 {HB_TAG ('l','n','u','m'), HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_UPPER_CASE_NUMBERS, (hb_aat_layout_feature_selector_t) 2}, 83 {HB_TAG ('m','g','r','k'), HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS, HB_AAT_LAYOUT_FEATURE_SELECTOR_MATHEMATICAL_GREEK_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_MATHEMATICAL_GREEK_OFF}, 84 {HB_TAG ('n','l','c','k'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_NLCCHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 85 {HB_TAG ('o','n','u','m'), HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_LOWER_CASE_NUMBERS, (hb_aat_layout_feature_selector_t) 2}, 86 {HB_TAG ('o','r','d','n'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION, HB_AAT_LAYOUT_FEATURE_SELECTOR_ORDINALS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NORMAL_POSITION}, 87 {HB_TAG ('p','a','l','t'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7}, 88 {HB_TAG ('p','c','a','p'), HB_AAT_LAYOUT_FEATURE_TYPE_LOWER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_LOWER_CASE_PETITE_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DEFAULT_LOWER_CASE}, 89 {HB_TAG ('p','k','n','a'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7}, 90 {HB_TAG ('p','n','u','m'), HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_PROPORTIONAL_NUMBERS, (hb_aat_layout_feature_selector_t) 4}, 91 {HB_TAG ('p','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7}, 92 {HB_TAG ('q','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_QUARTER_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7}, 93 {HB_TAG ('r','u','b','y'), HB_AAT_LAYOUT_FEATURE_TYPE_RUBY_KANA, HB_AAT_LAYOUT_FEATURE_SELECTOR_RUBY_KANA_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_RUBY_KANA_OFF}, 94 {HB_TAG ('s','i','n','f'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION, HB_AAT_LAYOUT_FEATURE_SELECTOR_SCIENTIFIC_INFERIORS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NORMAL_POSITION}, 95 {HB_TAG ('s','m','c','p'), HB_AAT_LAYOUT_FEATURE_TYPE_LOWER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_LOWER_CASE_SMALL_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DEFAULT_LOWER_CASE}, 96 {HB_TAG ('s','m','p','l'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_SIMPLIFIED_CHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 97 {HB_TAG ('s','s','0','1'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_ONE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_ONE_OFF}, 98 {HB_TAG ('s','s','0','2'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWO_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWO_OFF}, 99 {HB_TAG ('s','s','0','3'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_THREE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_THREE_OFF}, 100 {HB_TAG ('s','s','0','4'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FOUR_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FOUR_OFF}, 101 {HB_TAG ('s','s','0','5'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FIVE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FIVE_OFF}, 102 {HB_TAG ('s','s','0','6'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SIX_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SIX_OFF}, 103 {HB_TAG ('s','s','0','7'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SEVEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SEVEN_OFF}, 104 {HB_TAG ('s','s','0','8'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_EIGHT_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_EIGHT_OFF}, 105 {HB_TAG ('s','s','0','9'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_NINE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_NINE_OFF}, 106 {HB_TAG ('s','s','1','0'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TEN_OFF}, 107 {HB_TAG ('s','s','1','1'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_ELEVEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_ELEVEN_OFF}, 108 {HB_TAG ('s','s','1','2'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWELVE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWELVE_OFF}, 109 {HB_TAG ('s','s','1','3'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_THIRTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_THIRTEEN_OFF}, 110 {HB_TAG ('s','s','1','4'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FOURTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FOURTEEN_OFF}, 111 {HB_TAG ('s','s','1','5'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FIFTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FIFTEEN_OFF}, 112 {HB_TAG ('s','s','1','6'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SIXTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SIXTEEN_OFF}, 113 {HB_TAG ('s','s','1','7'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SEVENTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SEVENTEEN_OFF}, 114 {HB_TAG ('s','s','1','8'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_EIGHTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_EIGHTEEN_OFF}, 115 {HB_TAG ('s','s','1','9'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_NINETEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_NINETEEN_OFF}, 116 {HB_TAG ('s','s','2','0'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWENTY_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWENTY_OFF}, 117 {HB_TAG ('s','u','b','s'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION, HB_AAT_LAYOUT_FEATURE_SELECTOR_INFERIORS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NORMAL_POSITION}, 118 {HB_TAG ('s','u','p','s'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUPERIORS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NORMAL_POSITION}, 119 {HB_TAG ('s','w','s','h'), HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_SWASH_ALTERNATES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_SWASH_ALTERNATES_OFF}, 120 {HB_TAG ('t','i','t','l'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLE_OPTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_TITLING_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NO_STYLE_OPTIONS}, 121 {HB_TAG ('t','n','a','m'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_TRADITIONAL_NAMES_CHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 122 {HB_TAG ('t','n','u','m'), HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_MONOSPACED_NUMBERS, (hb_aat_layout_feature_selector_t) 4}, 123 {HB_TAG ('t','r','a','d'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_TRADITIONAL_CHARACTERS, (hb_aat_layout_feature_selector_t) 16}, 124 {HB_TAG ('t','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_THIRD_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7}, 125 {HB_TAG ('u','n','i','c'), HB_AAT_LAYOUT_FEATURE_TYPE_LETTER_CASE, (hb_aat_layout_feature_selector_t) 14, (hb_aat_layout_feature_selector_t) 15}, 126 {HB_TAG ('v','a','l','t'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7}, 127 {HB_TAG ('v','e','r','t'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_SUBSTITUTION, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUBSTITUTE_VERTICAL_FORMS_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUBSTITUTE_VERTICAL_FORMS_OFF}, 128 {HB_TAG ('v','h','a','l'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_HALF_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7}, 129 {HB_TAG ('v','k','n','a'), HB_AAT_LAYOUT_FEATURE_TYPE_ALTERNATE_KANA, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALTERNATE_VERT_KANA_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALTERNATE_VERT_KANA_OFF}, 130 {HB_TAG ('v','p','a','l'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7}, 131 {HB_TAG ('v','r','t','2'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_SUBSTITUTION, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUBSTITUTE_VERTICAL_FORMS_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUBSTITUTE_VERTICAL_FORMS_OFF}, 132 {HB_TAG ('z','e','r','o'), HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS, HB_AAT_LAYOUT_FEATURE_SELECTOR_SLASHED_ZERO_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_SLASHED_ZERO_OFF}, 133 }; 134 135 const hb_aat_feature_mapping_t * 136 hb_aat_layout_find_feature_mapping (hb_tag_t tag) 137 { 138 return (const hb_aat_feature_mapping_t *) bsearch (&tag, 139 feature_mappings, 140 ARRAY_LENGTH (feature_mappings), 141 sizeof (feature_mappings[0]), 142 hb_aat_feature_mapping_t::cmp); 143 } 144 145 146 /* 147 * hb_aat_apply_context_t 148 */ 149 150 AAT::hb_aat_apply_context_t::hb_aat_apply_context_t (const hb_ot_shape_plan_t *plan_, 151 hb_font_t *font_, 152 hb_buffer_t *buffer_, 153 hb_blob_t *blob) : 154 plan (plan_), 155 font (font_), 156 face (font->face), 157 buffer (buffer_), 158 sanitizer (), 159 ankr_table (&Null(AAT::ankr)), 160 ankr_end (nullptr), 161 lookup_index (0), 162 debug_depth (0) 163 { 164 sanitizer.init (blob); 165 sanitizer.set_num_glyphs (face->get_num_glyphs ()); 166 sanitizer.start_processing (); 167 sanitizer.set_max_ops (HB_SANITIZE_MAX_OPS_MAX); 168 } 169 170 AAT::hb_aat_apply_context_t::~hb_aat_apply_context_t () 171 { sanitizer.end_processing (); } 172 173 void 174 AAT::hb_aat_apply_context_t::set_ankr_table (const AAT::ankr *ankr_table_, 175 const char *ankr_end_) 176 { 177 ankr_table = ankr_table_; 178 ankr_end = ankr_end_; 179 } 180 181 182 /* 183 * mort/morx/kerx/trak 184 */ 185 186 187 void 188 hb_aat_layout_compile_map (const hb_aat_map_builder_t *mapper, 189 hb_aat_map_t *map) 190 { 191 const AAT::morx& morx = *mapper->face->table.morx; 192 if (morx.has_data ()) 193 { 194 morx.compile_flags (mapper, map); 195 return; 196 } 197 198 const AAT::mort& mort = *mapper->face->table.mort; 199 if (mort.has_data ()) 200 { 201 mort.compile_flags (mapper, map); 202 return; 203 } 204 } 205 206 207 /* 208 * hb_aat_layout_has_substitution: 209 * @face: 210 * 211 * Returns: 212 * Since: 2.3.0 213 */ 214 hb_bool_t 215 hb_aat_layout_has_substitution (hb_face_t *face) 216 { 217 return face->table.morx->has_data () || 218 face->table.mort->has_data (); 219 } 220 221 void 222 hb_aat_layout_substitute (const hb_ot_shape_plan_t *plan, 223 hb_font_t *font, 224 hb_buffer_t *buffer) 225 { 226 hb_blob_t *morx_blob = font->face->table.morx.get_blob (); 227 const AAT::morx& morx = *morx_blob->as<AAT::morx> (); 228 if (morx.has_data ()) 229 { 230 AAT::hb_aat_apply_context_t c (plan, font, buffer, morx_blob); 231 morx.apply (&c); 232 return; 233 } 234 235 hb_blob_t *mort_blob = font->face->table.mort.get_blob (); 236 const AAT::mort& mort = *mort_blob->as<AAT::mort> (); 237 if (mort.has_data ()) 238 { 239 AAT::hb_aat_apply_context_t c (plan, font, buffer, mort_blob); 240 mort.apply (&c); 241 return; 242 } 243 } 244 245 void 246 hb_aat_layout_zero_width_deleted_glyphs (hb_buffer_t *buffer) 247 { 248 unsigned int count = buffer->len; 249 hb_glyph_info_t *info = buffer->info; 250 hb_glyph_position_t *pos = buffer->pos; 251 for (unsigned int i = 0; i < count; i++) 252 if (unlikely (info[i].codepoint == AAT::DELETED_GLYPH)) 253 pos[i].x_advance = pos[i].y_advance = pos[i].x_offset = pos[i].y_offset = 0; 254 } 255 256 static bool 257 is_deleted_glyph (const hb_glyph_info_t *info) 258 { 259 return info->codepoint == AAT::DELETED_GLYPH; 260 } 261 262 void 263 hb_aat_layout_remove_deleted_glyphs (hb_buffer_t *buffer) 264 { 265 hb_ot_layout_delete_glyphs_inplace (buffer, is_deleted_glyph); 266 } 267 268 /* 269 * hb_aat_layout_has_positioning: 270 * @face: 271 * 272 * Returns: 273 * Since: 2.3.0 274 */ 275 hb_bool_t 276 hb_aat_layout_has_positioning (hb_face_t *face) 277 { 278 return face->table.kerx->has_data (); 279 } 280 281 void 282 hb_aat_layout_position (const hb_ot_shape_plan_t *plan, 283 hb_font_t *font, 284 hb_buffer_t *buffer) 285 { 286 hb_blob_t *kerx_blob = font->face->table.kerx.get_blob (); 287 const AAT::kerx& kerx = *kerx_blob->as<AAT::kerx> (); 288 289 hb_blob_t *ankr_blob = font->face->table.ankr.get_blob ();; 290 const AAT::ankr& ankr = *font->face->table.ankr; 291 292 AAT::hb_aat_apply_context_t c (plan, font, buffer, kerx_blob); 293 c.set_ankr_table (&ankr, ankr_blob->data + ankr_blob->length); 294 kerx.apply (&c); 295 } 296 297 298 /* 299 * hb_aat_layout_has_tracking: 300 * @face: 301 * 302 * Returns: 303 * Since: 2.3.0 304 */ 305 hb_bool_t 306 hb_aat_layout_has_tracking (hb_face_t *face) 307 { 308 return face->table.trak->has_data (); 309 } 310 311 void 312 hb_aat_layout_track (const hb_ot_shape_plan_t *plan, 313 hb_font_t *font, 314 hb_buffer_t *buffer) 315 { 316 const AAT::trak& trak = *font->face->table.trak; 317 318 AAT::hb_aat_apply_context_t c (plan, font, buffer); 319 trak.apply (&c); 320 } 321 322 323 hb_language_t 324 _hb_aat_language_get (hb_face_t *face, 325 unsigned int i) 326 { 327 return face->table.ltag->get_language (i); 328 } 329 330 /** 331 * hb_aat_layout_get_feature_types: 332 * @face: a face object 333 * @start_offset: iteration's start offset 334 * @feature_count:(inout) (allow-none): buffer size as input, filled size as output 335 * @features: (out caller-allocates) (array length=feature_count): features buffer 336 * 337 * Return value: Number of all available feature types. 338 * 339 * Since: 2.2.0 340 */ 341 unsigned int 342 hb_aat_layout_get_feature_types (hb_face_t *face, 343 unsigned int start_offset, 344 unsigned int *feature_count, /* IN/OUT. May be NULL. */ 345 hb_aat_layout_feature_type_t *features /* OUT. May be NULL. */) 346 { 347 return face->table.feat->get_feature_types (start_offset, feature_count, features); 348 } 349 350 /** 351 * hb_aat_layout_feature_type_get_name_id: 352 * @face: a face object 353 * @feature_type: feature id 354 * 355 * Return value: Name ID index 356 * 357 * Since: 2.2.0 358 */ 359 hb_ot_name_id_t 360 hb_aat_layout_feature_type_get_name_id (hb_face_t *face, 361 hb_aat_layout_feature_type_t feature_type) 362 { 363 return face->table.feat->get_feature_name_id (feature_type); 364 } 365 366 /** 367 * hb_aat_layout_feature_type_get_selectors: 368 * @face: a face object 369 * @feature_type: feature id 370 * @start_offset: iteration's start offset 371 * @selector_count: (inout) (allow-none): buffer size as input, filled size as output 372 * @selectors: (out caller-allocates) (array length=selector_count): settings buffer 373 * @default_index: (out) (allow-none): index of default selector if any 374 * 375 * If upon return, @default_index is set to #HB_AAT_LAYOUT_NO_SELECTOR_INDEX, then 376 * the feature type is non-exclusive. Otherwise, @default_index is the index of 377 * the selector that is selected by default. 378 * 379 * Return value: Number of all available feature selectors. 380 * 381 * Since: 2.2.0 382 */ 383 unsigned int 384 hb_aat_layout_feature_type_get_selector_infos (hb_face_t *face, 385 hb_aat_layout_feature_type_t feature_type, 386 unsigned int start_offset, 387 unsigned int *selector_count, /* IN/OUT. May be NULL. */ 388 hb_aat_layout_feature_selector_info_t *selectors, /* OUT. May be NULL. */ 389 unsigned int *default_index /* OUT. May be NULL. */) 390 { 391 return face->table.feat->get_selector_infos (feature_type, start_offset, selector_count, selectors, default_index); 392 } 393
