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 lookup_index (0),
161 debug_depth (0)
162 {
163 sanitizer.init (blob);
164 sanitizer.set_num_glyphs (face->get_num_glyphs ());
165 sanitizer.start_processing ();
166 sanitizer.set_max_ops (HB_SANITIZE_MAX_OPS_MAX);
167 }
168
169 AAT::hb_aat_apply_context_t::~hb_aat_apply_context_t ()
170 { sanitizer.end_processing (); }
171
172 void
173 AAT::hb_aat_apply_context_t::set_ankr_table (const AAT::ankr *ankr_table_)
174 { ankr_table = ankr_table_; }
175
176
177 /*
178 * mort/morx/kerx/trak
179 */
180
181
182 void
183 hb_aat_layout_compile_map (const hb_aat_map_builder_t *mapper,
184 hb_aat_map_t *map)
185 {
186 const AAT::morx& morx = *mapper->face->table.morx;
187 if (morx.has_data ())
188 {
189 morx.compile_flags (mapper, map);
190 return;
191 }
192
193 const AAT::mort& mort = *mapper->face->table.mort;
194 if (mort.has_data ())
195 {
196 mort.compile_flags (mapper, map);
197 return;
198 }
199 }
200
201
202 /*
203 * hb_aat_layout_has_substitution:
204 * @face:
205 *
206 * Returns:
207 * Since: 2.3.0
208 */
209 hb_bool_t
210 hb_aat_layout_has_substitution (hb_face_t *face)
211 {
212 return face->table.morx->has_data () ||
213 face->table.mort->has_data ();
214 }
215
216 void
217 hb_aat_layout_substitute (const hb_ot_shape_plan_t *plan,
218 hb_font_t *font,
219 hb_buffer_t *buffer)
220 {
221 hb_blob_t *morx_blob = font->face->table.morx.get_blob ();
222 const AAT::morx& morx = *morx_blob->as<AAT::morx> ();
223 if (morx.has_data ())
224 {
225 AAT::hb_aat_apply_context_t c (plan, font, buffer, morx_blob);
226 morx.apply (&c);
227 return;
228 }
229
230 hb_blob_t *mort_blob = font->face->table.mort.get_blob ();
231 const AAT::mort& mort = *mort_blob->as<AAT::mort> ();
232 if (mort.has_data ())
233 {
234 AAT::hb_aat_apply_context_t c (plan, font, buffer, mort_blob);
235 mort.apply (&c);
236 return;
237 }
238 }
239
240 void
241 hb_aat_layout_zero_width_deleted_glyphs (hb_buffer_t *buffer)
242 {
243 unsigned int count = buffer->len;
244 hb_glyph_info_t *info = buffer->info;
245 hb_glyph_position_t *pos = buffer->pos;
246 for (unsigned int i = 0; i < count; i++)
247 if (unlikely (info[i].codepoint == AAT::DELETED_GLYPH))
248 pos[i].x_advance = pos[i].y_advance = pos[i].x_offset = pos[i].y_offset = 0;
249 }
250
251 static bool
252 is_deleted_glyph (const hb_glyph_info_t *info)
253 {
254 return info->codepoint == AAT::DELETED_GLYPH;
255 }
256
257 void
258 hb_aat_layout_remove_deleted_glyphs (hb_buffer_t *buffer)
259 {
260 hb_ot_layout_delete_glyphs_inplace (buffer, is_deleted_glyph);
261 }
262
263 /*
264 * hb_aat_layout_has_positioning:
265 * @face:
266 *
267 * Returns:
268 * Since: 2.3.0
269 */
270 hb_bool_t
271 hb_aat_layout_has_positioning (hb_face_t *face)
272 {
273 return face->table.kerx->has_data ();
274 }
275
276 void
277 hb_aat_layout_position (const hb_ot_shape_plan_t *plan,
278 hb_font_t *font,
279 hb_buffer_t *buffer)
280 {
281 hb_blob_t *kerx_blob = font->face->table.kerx.get_blob ();
282 const AAT::kerx& kerx = *kerx_blob->as<AAT::kerx> ();
283
284 AAT::hb_aat_apply_context_t c (plan, font, buffer, kerx_blob);
285 c.set_ankr_table (font->face->table.ankr.get ());
286 kerx.apply (&c);
287 }
288
289
290 /*
291 * hb_aat_layout_has_tracking:
292 * @face:
293 *
294 * Returns:
295 * Since: 2.3.0
296 */
297 hb_bool_t
298 hb_aat_layout_has_tracking (hb_face_t *face)
299 {
300 return face->table.trak->has_data ();
301 }
302
303 void
304 hb_aat_layout_track (const hb_ot_shape_plan_t *plan,
305 hb_font_t *font,
306 hb_buffer_t *buffer)
307 {
308 const AAT::trak& trak = *font->face->table.trak;
309
310 AAT::hb_aat_apply_context_t c (plan, font, buffer);
311 trak.apply (&c);
312 }
313
314
315 hb_language_t
316 _hb_aat_language_get (hb_face_t *face,
317 unsigned int i)
318 {
319 return face->table.ltag->get_language (i);
320 }
321
322 /**
323 * hb_aat_layout_get_feature_types:
324 * @face: a face object
325 * @start_offset: iteration's start offset
326 * @feature_count:(inout) (allow-none): buffer size as input, filled size as output
327 * @features: (out caller-allocates) (array length=feature_count): features buffer
328 *
329 * Return value: Number of all available feature types.
330 *
331 * Since: 2.2.0
332 */
333 unsigned int
334 hb_aat_layout_get_feature_types (hb_face_t *face,
335 unsigned int start_offset,
336 unsigned int *feature_count, /* IN/OUT. May be NULL. */
337 hb_aat_layout_feature_type_t *features /* OUT. May be NULL. */)
338 {
339 return face->table.feat->get_feature_types (start_offset, feature_count, features);
340 }
341
342 /**
343 * hb_aat_layout_feature_type_get_name_id:
344 * @face: a face object
345 * @feature_type: feature id
346 *
347 * Return value: Name ID index
348 *
349 * Since: 2.2.0
350 */
351 hb_ot_name_id_t
352 hb_aat_layout_feature_type_get_name_id (hb_face_t *face,
353 hb_aat_layout_feature_type_t feature_type)
354 {
355 return face->table.feat->get_feature_name_id (feature_type);
356 }
357
358 /**
359 * hb_aat_layout_feature_type_get_selectors:
360 * @face: a face object
361 * @feature_type: feature id
362 * @start_offset: iteration's start offset
363 * @selector_count: (inout) (allow-none): buffer size as input, filled size as output
364 * @selectors: (out caller-allocates) (array length=selector_count): settings buffer
365 * @default_index: (out) (allow-none): index of default selector if any
366 *
367 * If upon return, @default_index is set to #HB_AAT_LAYOUT_NO_SELECTOR_INDEX, then
368 * the feature type is non-exclusive. Otherwise, @default_index is the index of
369 * the selector that is selected by default.
370 *
371 * Return value: Number of all available feature selectors.
372 *
373 * Since: 2.2.0
374 */
375 unsigned int
376 hb_aat_layout_feature_type_get_selector_infos (hb_face_t *face,
377 hb_aat_layout_feature_type_t feature_type,
378 unsigned int start_offset,
379 unsigned int *selector_count, /* IN/OUT. May be NULL. */
380 hb_aat_layout_feature_selector_info_t *selectors, /* OUT. May be NULL. */
381 unsigned int *default_index /* OUT. May be NULL. */)
382 {
383 return face->table.feat->get_selector_infos (feature_type, start_offset, selector_count, selectors, default_index);
384 }