/src/skia/third_party/externals/harfbuzz/src/hb-aat-layout.cc
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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.hh" |
29 | | |
30 | | #include "hb-aat-layout.hh" |
31 | | #include "hb-aat-layout-ankr-table.hh" |
32 | | #include "hb-aat-layout-bsln-table.hh" // Just so we compile it; unused otherwise. |
33 | | #include "hb-aat-layout-feat-table.hh" |
34 | | #include "hb-aat-layout-just-table.hh" // Just so we compile it; unused otherwise. |
35 | | #include "hb-aat-layout-kerx-table.hh" |
36 | | #include "hb-aat-layout-morx-table.hh" |
37 | | #include "hb-aat-layout-trak-table.hh" |
38 | | #include "hb-aat-ltag-table.hh" |
39 | | |
40 | | |
41 | | /* |
42 | | * hb_aat_apply_context_t |
43 | | */ |
44 | | |
45 | | /* Note: This context is used for kerning, even without AAT, hence the condition. */ |
46 | | #if !defined(HB_NO_AAT) || !defined(HB_NO_OT_KERN) |
47 | | |
48 | | AAT::hb_aat_apply_context_t::hb_aat_apply_context_t (const hb_ot_shape_plan_t *plan_, |
49 | | hb_font_t *font_, |
50 | | hb_buffer_t *buffer_, |
51 | | hb_blob_t *blob) : |
52 | | plan (plan_), |
53 | | font (font_), |
54 | | face (font->face), |
55 | | buffer (buffer_), |
56 | | sanitizer (), |
57 | | ankr_table (&Null (AAT::ankr)), |
58 | | gdef_table (face->table.GDEF->table), |
59 | | lookup_index (0) |
60 | 0 | { |
61 | 0 | sanitizer.init (blob); |
62 | 0 | sanitizer.set_num_glyphs (face->get_num_glyphs ()); |
63 | 0 | sanitizer.start_processing (); |
64 | 0 | sanitizer.set_max_ops (HB_SANITIZE_MAX_OPS_MAX); |
65 | 0 | } |
66 | | |
67 | | AAT::hb_aat_apply_context_t::~hb_aat_apply_context_t () |
68 | 0 | { sanitizer.end_processing (); } |
69 | | |
70 | | void |
71 | | AAT::hb_aat_apply_context_t::set_ankr_table (const AAT::ankr *ankr_table_) |
72 | 0 | { ankr_table = ankr_table_; } |
73 | | |
74 | | #endif |
75 | | |
76 | | |
77 | | /** |
78 | | * SECTION:hb-aat-layout |
79 | | * @title: hb-aat-layout |
80 | | * @short_description: Apple Advanced Typography Layout |
81 | | * @include: hb-aat.h |
82 | | * |
83 | | * Functions for querying AAT Layout features in the font face. |
84 | | * |
85 | | * HarfBuzz supports all of the AAT tables used to implement shaping. Other |
86 | | * AAT tables and their associated features are not supported. |
87 | | **/ |
88 | | |
89 | | |
90 | | #if !defined(HB_NO_AAT) || defined(HAVE_CORETEXT) |
91 | | |
92 | | /* Mapping from OpenType feature tags to AAT feature names and selectors. |
93 | | * |
94 | | * Table data courtesy of Apple. Converted from mnemonics to integers |
95 | | * when moving to this file. */ |
96 | | static const hb_aat_feature_mapping_t feature_mappings[] = |
97 | | { |
98 | | {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}, |
99 | | {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}, |
100 | | {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}, |
101 | | {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}, |
102 | | {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}, |
103 | | {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}, |
104 | | {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}, |
105 | | {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}, |
106 | | {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}, |
107 | | {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}, |
108 | | {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}, |
109 | | {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}, |
110 | | {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}, |
111 | | {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}, |
112 | | {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}, |
113 | | {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}, |
114 | | {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}, |
115 | | {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}, |
116 | | {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}, |
117 | | {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}, |
118 | | {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}, |
119 | | {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}, |
120 | | {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}, |
121 | | {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}, |
122 | | {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}, |
123 | | {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}, |
124 | | {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}, |
125 | | {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}, |
126 | | {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}, |
127 | | {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}, |
128 | | {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}, |
129 | | {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}, |
130 | | {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}, |
131 | | {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}, |
132 | | {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}, |
133 | | {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}, |
134 | | {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}, |
135 | | {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}, |
136 | | {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}, |
137 | | {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}, |
138 | | {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}, |
139 | | {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}, |
140 | | {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}, |
141 | | {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}, |
142 | | {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}, |
143 | | {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}, |
144 | | {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}, |
145 | | {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}, |
146 | | {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}, |
147 | | {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}, |
148 | | {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}, |
149 | | {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}, |
150 | | {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}, |
151 | | {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}, |
152 | | {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}, |
153 | | {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}, |
154 | | {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}, |
155 | | {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}, |
156 | | {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}, |
157 | | {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}, |
158 | | {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}, |
159 | | {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}, |
160 | | {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}, |
161 | | {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}, |
162 | | {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}, |
163 | | {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}, |
164 | | {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}, |
165 | | {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}, |
166 | | {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}, |
167 | | {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}, |
168 | | {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}, |
169 | | {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}, |
170 | | {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}, |
171 | | {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}, |
172 | | {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}, |
173 | | {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}, |
174 | | }; |
175 | | |
176 | | /** |
177 | | * hb_aat_layout_find_feature_mapping: |
178 | | * @tag: The requested #hb_tag_t feature tag |
179 | | * |
180 | | * Fetches the AAT feature-and-selector combination that corresponds |
181 | | * to a given OpenType feature tag. |
182 | | * |
183 | | * Return value: the AAT features and selectors corresponding to the |
184 | | * OpenType feature tag queried |
185 | | * |
186 | | **/ |
187 | | const hb_aat_feature_mapping_t * |
188 | | hb_aat_layout_find_feature_mapping (hb_tag_t tag) |
189 | 0 | { |
190 | 0 | return hb_sorted_array (feature_mappings).bsearch (tag); |
191 | 0 | } |
192 | | #endif |
193 | | |
194 | | |
195 | | #ifndef HB_NO_AAT |
196 | | |
197 | | /* |
198 | | * mort/morx/kerx/trak |
199 | | */ |
200 | | |
201 | | |
202 | | void |
203 | | hb_aat_layout_compile_map (const hb_aat_map_builder_t *mapper, |
204 | | hb_aat_map_t *map) |
205 | 0 | { |
206 | 0 | const AAT::morx& morx = *mapper->face->table.morx; |
207 | 0 | if (morx.has_data ()) |
208 | 0 | { |
209 | 0 | morx.compile_flags (mapper, map); |
210 | 0 | return; |
211 | 0 | } |
212 | | |
213 | 0 | const AAT::mort& mort = *mapper->face->table.mort; |
214 | 0 | if (mort.has_data ()) |
215 | 0 | { |
216 | 0 | mort.compile_flags (mapper, map); |
217 | 0 | return; |
218 | 0 | } |
219 | 0 | } |
220 | | |
221 | | |
222 | | /** |
223 | | * hb_aat_layout_has_substitution: |
224 | | * @face: #hb_face_t to work upon |
225 | | * |
226 | | * Tests whether the specified face includes any substitutions in the |
227 | | * `morx` or `mort` tables. |
228 | | * |
229 | | * <note>Note: does not examine the `GSUB` table.</note> |
230 | | * |
231 | | * Return value: %true if data found, %false otherwise |
232 | | * |
233 | | * Since: 2.3.0 |
234 | | */ |
235 | | hb_bool_t |
236 | | hb_aat_layout_has_substitution (hb_face_t *face) |
237 | 171 | { |
238 | 171 | return face->table.morx->has_data () || |
239 | 171 | face->table.mort->has_data (); |
240 | 171 | } |
241 | | |
242 | | void |
243 | | hb_aat_layout_substitute (const hb_ot_shape_plan_t *plan, |
244 | | hb_font_t *font, |
245 | | hb_buffer_t *buffer) |
246 | 0 | { |
247 | 0 | hb_blob_t *morx_blob = font->face->table.morx.get_blob (); |
248 | 0 | const AAT::morx& morx = *morx_blob->as<AAT::morx> (); |
249 | 0 | if (morx.has_data ()) |
250 | 0 | { |
251 | 0 | AAT::hb_aat_apply_context_t c (plan, font, buffer, morx_blob); |
252 | 0 | if (!buffer->message (font, "start table morx")) return; |
253 | 0 | morx.apply (&c); |
254 | 0 | (void) buffer->message (font, "end table morx"); |
255 | 0 | return; |
256 | 0 | } |
257 | | |
258 | 0 | hb_blob_t *mort_blob = font->face->table.mort.get_blob (); |
259 | 0 | const AAT::mort& mort = *mort_blob->as<AAT::mort> (); |
260 | 0 | if (mort.has_data ()) |
261 | 0 | { |
262 | 0 | AAT::hb_aat_apply_context_t c (plan, font, buffer, mort_blob); |
263 | 0 | if (!buffer->message (font, "start table mort")) return; |
264 | 0 | mort.apply (&c); |
265 | 0 | (void) buffer->message (font, "end table mort"); |
266 | 0 | return; |
267 | 0 | } |
268 | 0 | } |
269 | | |
270 | | void |
271 | | hb_aat_layout_zero_width_deleted_glyphs (hb_buffer_t *buffer) |
272 | 0 | { |
273 | 0 | unsigned int count = buffer->len; |
274 | 0 | hb_glyph_info_t *info = buffer->info; |
275 | 0 | hb_glyph_position_t *pos = buffer->pos; |
276 | 0 | for (unsigned int i = 0; i < count; i++) |
277 | 0 | if (unlikely (info[i].codepoint == AAT::DELETED_GLYPH)) |
278 | 0 | pos[i].x_advance = pos[i].y_advance = pos[i].x_offset = pos[i].y_offset = 0; |
279 | 0 | } |
280 | | |
281 | | static bool |
282 | | is_deleted_glyph (const hb_glyph_info_t *info) |
283 | 0 | { |
284 | 0 | return info->codepoint == AAT::DELETED_GLYPH; |
285 | 0 | } |
286 | | |
287 | | void |
288 | | hb_aat_layout_remove_deleted_glyphs (hb_buffer_t *buffer) |
289 | 0 | { |
290 | 0 | hb_ot_layout_delete_glyphs_inplace (buffer, is_deleted_glyph); |
291 | 0 | } |
292 | | |
293 | | /** |
294 | | * hb_aat_layout_has_positioning: |
295 | | * @face: #hb_face_t to work upon |
296 | | * |
297 | | * Tests whether the specified face includes any positioning information |
298 | | * in the `kerx` table. |
299 | | * |
300 | | * <note>Note: does not examine the `GPOS` table.</note> |
301 | | * |
302 | | * Return value: %true if data found, %false otherwise |
303 | | * |
304 | | * Since: 2.3.0 |
305 | | */ |
306 | | hb_bool_t |
307 | | hb_aat_layout_has_positioning (hb_face_t *face) |
308 | 342 | { |
309 | 342 | return face->table.kerx->has_data (); |
310 | 342 | } |
311 | | |
312 | | void |
313 | | hb_aat_layout_position (const hb_ot_shape_plan_t *plan, |
314 | | hb_font_t *font, |
315 | | hb_buffer_t *buffer) |
316 | 0 | { |
317 | 0 | hb_blob_t *kerx_blob = font->face->table.kerx.get_blob (); |
318 | 0 | const AAT::kerx& kerx = *kerx_blob->as<AAT::kerx> (); |
319 | |
|
320 | 0 | AAT::hb_aat_apply_context_t c (plan, font, buffer, kerx_blob); |
321 | 0 | if (!buffer->message (font, "start table kerx")) return; |
322 | 0 | c.set_ankr_table (font->face->table.ankr.get ()); |
323 | 0 | kerx.apply (&c); |
324 | 0 | (void) buffer->message (font, "end table kerx"); |
325 | 0 | } |
326 | | |
327 | | |
328 | | /** |
329 | | * hb_aat_layout_has_tracking: |
330 | | * @face:: #hb_face_t to work upon |
331 | | * |
332 | | * Tests whether the specified face includes any tracking information |
333 | | * in the `trak` table. |
334 | | * |
335 | | * Return value: %true if data found, %false otherwise |
336 | | * |
337 | | * Since: 2.3.0 |
338 | | */ |
339 | | hb_bool_t |
340 | | hb_aat_layout_has_tracking (hb_face_t *face) |
341 | 171 | { |
342 | 171 | return face->table.trak->has_data (); |
343 | 171 | } |
344 | | |
345 | | void |
346 | | hb_aat_layout_track (const hb_ot_shape_plan_t *plan, |
347 | | hb_font_t *font, |
348 | | hb_buffer_t *buffer) |
349 | 0 | { |
350 | 0 | const AAT::trak& trak = *font->face->table.trak; |
351 | |
|
352 | 0 | AAT::hb_aat_apply_context_t c (plan, font, buffer); |
353 | 0 | trak.apply (&c); |
354 | 0 | } |
355 | | |
356 | | /** |
357 | | * hb_aat_layout_get_feature_types: |
358 | | * @face: #hb_face_t to work upon |
359 | | * @start_offset: offset of the first feature type to retrieve |
360 | | * @feature_count: (inout) (optional): Input = the maximum number of feature types to return; |
361 | | * Output = the actual number of feature types returned (may be zero) |
362 | | * @features: (out caller-allocates) (array length=feature_count): Array of feature types found |
363 | | * |
364 | | * Fetches a list of the AAT feature types included in the specified face. |
365 | | * |
366 | | * Return value: Number of all available feature types. |
367 | | * |
368 | | * Since: 2.2.0 |
369 | | */ |
370 | | unsigned int |
371 | | hb_aat_layout_get_feature_types (hb_face_t *face, |
372 | | unsigned int start_offset, |
373 | | unsigned int *feature_count, /* IN/OUT. May be NULL. */ |
374 | | hb_aat_layout_feature_type_t *features /* OUT. May be NULL. */) |
375 | 0 | { |
376 | 0 | return face->table.feat->get_feature_types (start_offset, feature_count, features); |
377 | 0 | } |
378 | | |
379 | | /** |
380 | | * hb_aat_layout_feature_type_get_name_id: |
381 | | * @face: #hb_face_t to work upon |
382 | | * @feature_type: The #hb_aat_layout_feature_type_t of the requested feature type |
383 | | * |
384 | | * Fetches the name identifier of the specified feature type in the face's `name` table. |
385 | | * |
386 | | * Return value: Name identifier of the requested feature type |
387 | | * |
388 | | * Since: 2.2.0 |
389 | | */ |
390 | | hb_ot_name_id_t |
391 | | hb_aat_layout_feature_type_get_name_id (hb_face_t *face, |
392 | | hb_aat_layout_feature_type_t feature_type) |
393 | 0 | { |
394 | 0 | return face->table.feat->get_feature_name_id (feature_type); |
395 | 0 | } |
396 | | |
397 | | /** |
398 | | * hb_aat_layout_feature_type_get_selector_infos: |
399 | | * @face: #hb_face_t to work upon |
400 | | * @feature_type: The #hb_aat_layout_feature_type_t of the requested feature type |
401 | | * @start_offset: offset of the first feature type to retrieve |
402 | | * @selector_count: (inout) (optional): Input = the maximum number of selectors to return; |
403 | | * Output = the actual number of selectors returned (may be zero) |
404 | | * @selectors: (out caller-allocates) (array length=selector_count) (optional): |
405 | | * A buffer pointer. The selectors available for the feature type queries. |
406 | | * @default_index: (out) (optional): The index of the feature's default selector, if any |
407 | | * |
408 | | * Fetches a list of the selectors available for the specified feature in the given face. |
409 | | * |
410 | | * If upon return, @default_index is set to #HB_AAT_LAYOUT_NO_SELECTOR_INDEX, then |
411 | | * the feature type is non-exclusive. Otherwise, @default_index is the index of |
412 | | * the selector that is selected by default. |
413 | | * |
414 | | * Return value: Number of all available feature selectors |
415 | | * |
416 | | * Since: 2.2.0 |
417 | | */ |
418 | | unsigned int |
419 | | hb_aat_layout_feature_type_get_selector_infos (hb_face_t *face, |
420 | | hb_aat_layout_feature_type_t feature_type, |
421 | | unsigned int start_offset, |
422 | | unsigned int *selector_count, /* IN/OUT. May be NULL. */ |
423 | | hb_aat_layout_feature_selector_info_t *selectors, /* OUT. May be NULL. */ |
424 | | unsigned int *default_index /* OUT. May be NULL. */) |
425 | 0 | { |
426 | 0 | return face->table.feat->get_selector_infos (feature_type, start_offset, selector_count, selectors, default_index); |
427 | 0 | } |
428 | | |
429 | | |
430 | | #endif |