2 * Copyright © 2011 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 * Google Author(s): Behdad Esfahbod
27 #include "hb-ot-shape-complex-private.hh"
32 /* buffer var allocations */
33 #define indic_category() var2.u8[0] /* indic_category_t */
34 #define indic_position() var2.u8[1] /* indic_matra_category_t */
36 #define INDIC_TABLE_ELEMENT_TYPE uint8_t
38 /* Cateories used in the OpenType spec:
39 * https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx
41 /* Note: This enum is duplicated in the -machine.rl source file.
42 * Not sure how to avoid duplication. */
43 enum indic_category_t {
46 OT_Ra, /* Not explicitly listed in the OT spec, but used in the grammar. */
59 /* Categories used in IndicSyllabicCategory.txt from UCD */
60 /* The assignments are guesswork */
61 enum indic_syllabic_category_t {
62 INDIC_SYLLABIC_CATEGORY_OTHER = OT_X,
64 INDIC_SYLLABIC_CATEGORY_AVAGRAHA = OT_X,
65 INDIC_SYLLABIC_CATEGORY_BINDU = OT_SM,
66 INDIC_SYLLABIC_CATEGORY_CONSONANT = OT_C,
67 INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD = OT_C,
68 INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL = OT_C,
69 INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C,
70 INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL = OT_C,
71 INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_NBSP,
72 INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_C,
73 INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA = OT_C,
74 INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER = OT_X,
75 INDIC_SYLLABIC_CATEGORY_NUKTA = OT_N,
76 INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER = OT_X,
77 INDIC_SYLLABIC_CATEGORY_TONE_LETTER = OT_X,
78 INDIC_SYLLABIC_CATEGORY_TONE_MARK = OT_X,
79 INDIC_SYLLABIC_CATEGORY_VIRAMA = OT_H,
80 INDIC_SYLLABIC_CATEGORY_VISARGA = OT_SM,
81 INDIC_SYLLABIC_CATEGORY_VOWEL = OT_V,
82 INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT = OT_M,
83 INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT = OT_V
86 /* Categories used in IndicSMatraCategory.txt from UCD */
87 enum indic_matra_category_t {
88 INDIC_MATRA_CATEGORY_NOT_APPLICABLE = 0,
90 INDIC_MATRA_CATEGORY_LEFT = 0x01,
91 INDIC_MATRA_CATEGORY_TOP = 0x02,
92 INDIC_MATRA_CATEGORY_BOTTOM = 0x04,
93 INDIC_MATRA_CATEGORY_RIGHT = 0x08,
95 /* We don't really care much about these since we decompose them
96 * in the generic pre-shaping layer. */
97 INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_BOTTOM +
98 INDIC_MATRA_CATEGORY_RIGHT,
99 INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_LEFT +
100 INDIC_MATRA_CATEGORY_RIGHT,
101 INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM = INDIC_MATRA_CATEGORY_TOP +
102 INDIC_MATRA_CATEGORY_BOTTOM,
103 INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_TOP +
104 INDIC_MATRA_CATEGORY_BOTTOM +
105 INDIC_MATRA_CATEGORY_RIGHT,
106 INDIC_MATRA_CATEGORY_TOP_AND_LEFT = INDIC_MATRA_CATEGORY_TOP +
107 INDIC_MATRA_CATEGORY_LEFT,
108 INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_TOP +
109 INDIC_MATRA_CATEGORY_LEFT +
110 INDIC_MATRA_CATEGORY_RIGHT,
111 INDIC_MATRA_CATEGORY_TOP_AND_RIGHT = INDIC_MATRA_CATEGORY_TOP +
112 INDIC_MATRA_CATEGORY_RIGHT,
114 INDIC_MATRA_CATEGORY_INVISIBLE = INDIC_MATRA_CATEGORY_NOT_APPLICABLE,
115 INDIC_MATRA_CATEGORY_OVERSTRUCK = INDIC_MATRA_CATEGORY_NOT_APPLICABLE,
116 INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT = INDIC_MATRA_CATEGORY_NOT_APPLICABLE
119 #define INDIC_COMBINE_CATEGORIES(S,M) \
120 (ASSERT_STATIC_EXPR (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || (S == INDIC_SYLLABIC_CATEGORY_VIRAMA || S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT)), \
121 ASSERT_STATIC_EXPR (S < 16 && M < 16), \
124 #include "hb-ot-shape-complex-indic-table.hh"
127 * This is a hack for now. We should:
128 * 1. Move this data into the main Indic table,
130 * 2. Probe font lookups to determine consonant positions.
132 static const struct {
134 indic_matra_category_t position;
135 } consonant_positions[] = {
136 {0x0930, INDIC_MATRA_CATEGORY_BOTTOM},
137 {0x09AC, INDIC_MATRA_CATEGORY_BOTTOM},
138 {0x09AF, INDIC_MATRA_CATEGORY_RIGHT},
139 {0x09B0, INDIC_MATRA_CATEGORY_BOTTOM},
140 {0x09F0, INDIC_MATRA_CATEGORY_BOTTOM},
141 {0x0A2F, INDIC_MATRA_CATEGORY_RIGHT},
142 {0x0A30, INDIC_MATRA_CATEGORY_BOTTOM},
143 {0x0A35, INDIC_MATRA_CATEGORY_BOTTOM},
144 {0x0A39, INDIC_MATRA_CATEGORY_BOTTOM},
145 {0x0AB0, INDIC_MATRA_CATEGORY_BOTTOM},
146 {0x0B24, INDIC_MATRA_CATEGORY_BOTTOM},
147 {0x0B28, INDIC_MATRA_CATEGORY_BOTTOM},
148 {0x0B2C, INDIC_MATRA_CATEGORY_BOTTOM},
149 {0x0B2D, INDIC_MATRA_CATEGORY_BOTTOM},
150 {0x0B2E, INDIC_MATRA_CATEGORY_BOTTOM},
151 {0x0B2F, INDIC_MATRA_CATEGORY_RIGHT},
152 {0x0B30, INDIC_MATRA_CATEGORY_BOTTOM},
153 {0x0B32, INDIC_MATRA_CATEGORY_BOTTOM},
154 {0x0B33, INDIC_MATRA_CATEGORY_BOTTOM},
155 {0x0B5F, INDIC_MATRA_CATEGORY_RIGHT},
156 {0x0B71, INDIC_MATRA_CATEGORY_BOTTOM},
157 {0x0C15, INDIC_MATRA_CATEGORY_BOTTOM},
158 {0x0C16, INDIC_MATRA_CATEGORY_BOTTOM},
159 {0x0C17, INDIC_MATRA_CATEGORY_BOTTOM},
160 {0x0C18, INDIC_MATRA_CATEGORY_BOTTOM},
161 {0x0C19, INDIC_MATRA_CATEGORY_BOTTOM},
162 {0x0C1A, INDIC_MATRA_CATEGORY_BOTTOM},
163 {0x0C1B, INDIC_MATRA_CATEGORY_BOTTOM},
164 {0x0C1C, INDIC_MATRA_CATEGORY_BOTTOM},
165 {0x0C1D, INDIC_MATRA_CATEGORY_BOTTOM},
166 {0x0C1E, INDIC_MATRA_CATEGORY_BOTTOM},
167 {0x0C1F, INDIC_MATRA_CATEGORY_BOTTOM},
168 {0x0C20, INDIC_MATRA_CATEGORY_BOTTOM},
169 {0x0C21, INDIC_MATRA_CATEGORY_BOTTOM},
170 {0x0C22, INDIC_MATRA_CATEGORY_BOTTOM},
171 {0x0C23, INDIC_MATRA_CATEGORY_BOTTOM},
172 {0x0C24, INDIC_MATRA_CATEGORY_BOTTOM},
173 {0x0C25, INDIC_MATRA_CATEGORY_BOTTOM},
174 {0x0C26, INDIC_MATRA_CATEGORY_BOTTOM},
175 {0x0C27, INDIC_MATRA_CATEGORY_BOTTOM},
176 {0x0C28, INDIC_MATRA_CATEGORY_BOTTOM},
177 {0x0C2A, INDIC_MATRA_CATEGORY_BOTTOM},
178 {0x0C2B, INDIC_MATRA_CATEGORY_BOTTOM},
179 {0x0C2C, INDIC_MATRA_CATEGORY_BOTTOM},
180 {0x0C2D, INDIC_MATRA_CATEGORY_BOTTOM},
181 {0x0C2E, INDIC_MATRA_CATEGORY_BOTTOM},
182 {0x0C2F, INDIC_MATRA_CATEGORY_BOTTOM},
183 {0x0C30, INDIC_MATRA_CATEGORY_BOTTOM},
184 {0x0C32, INDIC_MATRA_CATEGORY_BOTTOM},
185 {0x0C33, INDIC_MATRA_CATEGORY_BOTTOM},
186 {0x0C35, INDIC_MATRA_CATEGORY_BOTTOM},
187 {0x0C36, INDIC_MATRA_CATEGORY_BOTTOM},
188 {0x0C37, INDIC_MATRA_CATEGORY_BOTTOM},
189 {0x0C38, INDIC_MATRA_CATEGORY_BOTTOM},
190 {0x0C39, INDIC_MATRA_CATEGORY_BOTTOM},
191 {0x0C95, INDIC_MATRA_CATEGORY_BOTTOM},
192 {0x0C96, INDIC_MATRA_CATEGORY_BOTTOM},
193 {0x0C97, INDIC_MATRA_CATEGORY_BOTTOM},
194 {0x0C98, INDIC_MATRA_CATEGORY_BOTTOM},
195 {0x0C99, INDIC_MATRA_CATEGORY_BOTTOM},
196 {0x0C9A, INDIC_MATRA_CATEGORY_BOTTOM},
197 {0x0C9B, INDIC_MATRA_CATEGORY_BOTTOM},
198 {0x0C9C, INDIC_MATRA_CATEGORY_BOTTOM},
199 {0x0C9D, INDIC_MATRA_CATEGORY_BOTTOM},
200 {0x0C9E, INDIC_MATRA_CATEGORY_BOTTOM},
201 {0x0C9F, INDIC_MATRA_CATEGORY_BOTTOM},
202 {0x0CA0, INDIC_MATRA_CATEGORY_BOTTOM},
203 {0x0CA1, INDIC_MATRA_CATEGORY_BOTTOM},
204 {0x0CA2, INDIC_MATRA_CATEGORY_BOTTOM},
205 {0x0CA3, INDIC_MATRA_CATEGORY_BOTTOM},
206 {0x0CA4, INDIC_MATRA_CATEGORY_BOTTOM},
207 {0x0CA5, INDIC_MATRA_CATEGORY_BOTTOM},
208 {0x0CA6, INDIC_MATRA_CATEGORY_BOTTOM},
209 {0x0CA7, INDIC_MATRA_CATEGORY_BOTTOM},
210 {0x0CA8, INDIC_MATRA_CATEGORY_BOTTOM},
211 {0x0CAA, INDIC_MATRA_CATEGORY_BOTTOM},
212 {0x0CAB, INDIC_MATRA_CATEGORY_BOTTOM},
213 {0x0CAC, INDIC_MATRA_CATEGORY_BOTTOM},
214 {0x0CAD, INDIC_MATRA_CATEGORY_BOTTOM},
215 {0x0CAE, INDIC_MATRA_CATEGORY_BOTTOM},
216 {0x0CAF, INDIC_MATRA_CATEGORY_BOTTOM},
217 {0x0CB0, INDIC_MATRA_CATEGORY_BOTTOM},
218 {0x0CB2, INDIC_MATRA_CATEGORY_BOTTOM},
219 {0x0CB3, INDIC_MATRA_CATEGORY_BOTTOM},
220 {0x0CB5, INDIC_MATRA_CATEGORY_BOTTOM},
221 {0x0CB6, INDIC_MATRA_CATEGORY_BOTTOM},
222 {0x0CB7, INDIC_MATRA_CATEGORY_BOTTOM},
223 {0x0CB8, INDIC_MATRA_CATEGORY_BOTTOM},
224 {0x0CB9, INDIC_MATRA_CATEGORY_BOTTOM},
225 {0x0CDE, INDIC_MATRA_CATEGORY_BOTTOM},
226 {0x0D2F, INDIC_MATRA_CATEGORY_RIGHT},
227 {0x0D30, INDIC_MATRA_CATEGORY_RIGHT},
228 {0x0D32, INDIC_MATRA_CATEGORY_BOTTOM},
229 {0x0D35, INDIC_MATRA_CATEGORY_RIGHT},
233 static const struct {
236 } indic_basic_features[] =
238 {HB_TAG('n','u','k','t'), true},
239 {HB_TAG('a','k','h','n'), false},
240 {HB_TAG('r','p','h','f'), false},
241 {HB_TAG('r','k','r','f'), false},
242 {HB_TAG('p','r','e','f'), false},
243 {HB_TAG('b','l','w','f'), false},
244 {HB_TAG('h','a','l','f'), false},
245 {HB_TAG('v','a','t','u'), true},
246 {HB_TAG('p','s','t','f'), false},
247 {HB_TAG('c','j','c','t'), true},
250 /* Same order as the indic_basic_features array */
264 static const hb_tag_t indic_other_features[] =
266 HB_TAG('p','r','e','s'),
267 HB_TAG('a','b','v','s'),
268 HB_TAG('b','l','w','s'),
269 HB_TAG('p','s','t','s'),
270 HB_TAG('h','a','l','n'),
272 HB_TAG('d','i','s','t'),
273 HB_TAG('a','b','v','m'),
274 HB_TAG('b','l','w','m'),
279 _hb_ot_shape_complex_collect_features_indic (hb_ot_shape_planner_t *planner, const hb_segment_properties_t *props HB_UNUSED)
281 for (unsigned int i = 0; i < ARRAY_LENGTH (indic_basic_features); i++)
282 planner->map.add_bool_feature (indic_basic_features[i].tag, indic_basic_features[i].is_global);
284 for (unsigned int i = 0; i < ARRAY_LENGTH (indic_other_features); i++)
285 planner->map.add_bool_feature (indic_other_features[i], true);
290 #include "hb-ot-shape-complex-indic-machine.hh"
294 _hb_ot_shape_complex_setup_masks_indic (hb_ot_shape_context_t *c)
296 unsigned int count = c->buffer->len;
298 for (unsigned int i = 0; i < count; i++)
300 unsigned int type = get_indic_categories (c->buffer->info[i].codepoint);
302 c->buffer->info[i].indic_category() = type & 0x0F;
303 c->buffer->info[i].indic_position() = type >> 4;
308 hb_mask_t mask_array[ARRAY_LENGTH (indic_basic_features)] = {0};
309 unsigned int num_masks = ARRAY_LENGTH (indic_basic_features);
310 for (unsigned int i = 0; i < num_masks; i++)
311 mask_array[i] = c->plan->map.get_1_mask (indic_basic_features[i].tag);