hb-ot-shape.cc revision bd0987386b3a4dddf208ccf1a70ebfff6242ba73
12014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod/* 22014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * Copyright (C) 2009 Red Hat, Inc. 32014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 4c755cb3e3ac55156d0d2ec05adea7a650b97cc41Behdad Esfahbod * This is part of HarfBuzz, a text shaping library. 52014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 62014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * Permission is hereby granted, without written agreement and without 72014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * license or royalty fees, to use, copy, modify, and distribute this 82014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * software and its documentation for any purpose, provided that the 92014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * above copyright notice and the following two paragraphs appear in 102014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * all copies of this software. 112014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 122014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 132014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 142014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 152014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 162014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * DAMAGE. 172014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 182014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 192014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 202014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 212014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 222014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 232014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 242014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * Red Hat Author(s): Behdad Esfahbod 252014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod */ 262014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 27ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod#include "hb-ot-shape.h" 282014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2922da7fd94d6318c52df69d70470a85464ffc533dBehdad Esfahbod#include "hb-buffer-private.hh" 302014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 312014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod#include "hb-ot-layout.h" 322014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 3375f3469ca6d626b08eb411984a2ba7fd48ca5b5fBehdad Esfahbod/* XXX vertical */ 342014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodhb_tag_t default_features[] = { 35bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('c','a','l','t'), 362014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('c','c','m','p'), 372014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('c','l','i','g'), 38bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('c','s','w','h'), 39bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('c','u','r','s'), 402014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('k','e','r','n'), 41bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('l','i','g','a'), 42bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('l','o','c','l'), 432014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('m','a','r','k'), 442014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('m','k','m','k'), 45bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('r','l','i','g') 462014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod}; 472014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 481094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbodenum { 491094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod MASK_ALWAYS_ON = 1 << 0, 501094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod MASK_RTLM = 1 << 1 511094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod}; 521094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod#define MASK_BITS_USED 2 531094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod 546b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbodstruct lookup_map { 556b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod unsigned int index; 566b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod hb_mask_t mask; 576b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod}; 586b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod 592014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 602014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodstatic void 612014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodadd_feature (hb_face_t *face, 622014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_tag_t table_tag, 632014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int feature_index, 646b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod hb_mask_t mask, 656b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod lookup_map *lookups, 662014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int *num_lookups, 672014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int room_lookups) 682014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 692014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int i = room_lookups - *num_lookups; 706b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod lookups += *num_lookups; 716b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod 726b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod unsigned int *lookup_indices = (unsigned int *) lookups; 736b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod 742014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_feature_get_lookup_indexes (face, table_tag, feature_index, 0, 752014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod &i, 766b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod lookup_indices); 776b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod 782014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod *num_lookups += i; 796b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod 806b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod while (i--) { 816b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod lookups[i].mask = mask; 826b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod lookups[i].index = lookup_indices[i]; 836b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod } 842014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 852014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 86074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbodstatic hb_bool_t 87074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbodmaybe_add_feature (hb_face_t *face, 88074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod hb_tag_t table_tag, 89074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod unsigned int script_index, 90074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod unsigned int language_index, 91074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod hb_tag_t feature_tag, 92074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod hb_mask_t mask, 93074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod lookup_map *lookups, 94074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod unsigned int *num_lookups, 95074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod unsigned int room_lookups) 96074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod{ 97074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod unsigned int feature_index; 98074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod if (hb_ot_layout_language_find_feature (face, table_tag, script_index, language_index, 99074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod feature_tag, 100074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod &feature_index)) 101074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod { 102074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod add_feature (face, table_tag, feature_index, mask, lookups, num_lookups, room_lookups); 103074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod return TRUE; 104074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod } 105074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod return FALSE; 106074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod} 107074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod 1082014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodstatic int 1092014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodcmp_lookups (const void *p1, const void *p2) 1102014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 1116b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod const lookup_map *a = (const lookup_map *) p1; 1126b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod const lookup_map *b = (const lookup_map *) p2; 1132014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1146b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod return a->index - b->index; 1152014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 1162014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1172014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodstatic void 1184206e9511a222c0c50cc9b4fe72ec421983bba2cBehdad Esfahbodsetup_lookups (hb_face_t *face, 1192014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_buffer_t *buffer, 1202014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_feature_t *features, 1212014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int num_features, 1222014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_tag_t table_tag, 1236b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod lookup_map *lookups, 124074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod unsigned int *num_lookups, 125074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod hb_direction_t original_direction) 1262014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 1272014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int i, j, script_index, language_index, feature_index, room_lookups; 1282014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1292014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod room_lookups = *num_lookups; 1302014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod *num_lookups = 0; 1312014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1322014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_table_choose_script (face, table_tag, 1332014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_tags_from_script (buffer->script), 1342014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod &script_index); 1352014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_script_find_language (face, table_tag, script_index, 1362014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_tag_from_language (buffer->language), 1372014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod &language_index); 1382014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1392014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (hb_ot_layout_language_get_required_feature_index (face, table_tag, script_index, language_index, 1402014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod &feature_index)) 1416b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod add_feature (face, table_tag, feature_index, 1, lookups, num_lookups, room_lookups); 1422014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1432014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod for (i = 0; i < ARRAY_LENGTH (default_features); i++) 144074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod maybe_add_feature (face, table_tag, script_index, language_index, default_features[i], 1, lookups, num_lookups, room_lookups); 145074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod 146074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod switch (original_direction) { 147074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod case HB_DIRECTION_LTR: 148074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod maybe_add_feature (face, table_tag, script_index, language_index, HB_TAG ('l','t','r','a'), 1, lookups, num_lookups, room_lookups); 149074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod maybe_add_feature (face, table_tag, script_index, language_index, HB_TAG ('l','t','r','m'), 1, lookups, num_lookups, room_lookups); 150074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod break; 151074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod case HB_DIRECTION_RTL: 152074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod maybe_add_feature (face, table_tag, script_index, language_index, HB_TAG ('r','t','l','a'), 1, lookups, num_lookups, room_lookups); 153074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod break; 154074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod case HB_DIRECTION_TTB: 155074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod case HB_DIRECTION_BTT: 156074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod default: 157074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod break; 1582014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod } 1592014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1601094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod unsigned int next_bit = MASK_BITS_USED; 1611ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod hb_mask_t global_mask = 0; 1627f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod for (i = 0; i < num_features; i++) 1637f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod { 1641ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod hb_feature_t *feature = &features[i]; 1654a9a5c0b06e8aa5d15327242609a7c766d3e0e94Behdad Esfahbod if (!hb_ot_layout_language_find_feature (face, table_tag, script_index, language_index, 1661ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod feature->tag, 1674a9a5c0b06e8aa5d15327242609a7c766d3e0e94Behdad Esfahbod &feature_index)) 1684a9a5c0b06e8aa5d15327242609a7c766d3e0e94Behdad Esfahbod continue; 1694a9a5c0b06e8aa5d15327242609a7c766d3e0e94Behdad Esfahbod 1701ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod if (feature->value == 1 && feature->start == 0 && feature->end == (unsigned int) -1) { 1711ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod add_feature (face, table_tag, feature_index, 1, lookups, num_lookups, room_lookups); 1726774463883978b00b4d8c719ed75edfc4537c77fBehdad Esfahbod continue; 1731ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod } 1741ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod 1751ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod /* Allocate bits for the features */ 1761ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod 1771ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod unsigned int bits_needed = _hb_bit_storage (feature->value); 1781ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod if (!bits_needed) 1791ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod continue; /* Feature disabled */ 1801ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod 1811ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod if (next_bit + bits_needed > 8 * sizeof (hb_mask_t)) 1821ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod continue; /* Oh well... */ 1831ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod 1841ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod unsigned int mask = (1 << (next_bit + bits_needed)) - (1 << next_bit); 1851ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod unsigned int value = feature->value << next_bit; 1861ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod next_bit += bits_needed; 1876774463883978b00b4d8c719ed75edfc4537c77fBehdad Esfahbod 1884a9a5c0b06e8aa5d15327242609a7c766d3e0e94Behdad Esfahbod add_feature (face, table_tag, feature_index, mask, lookups, num_lookups, room_lookups); 1896774463883978b00b4d8c719ed75edfc4537c77fBehdad Esfahbod 1901ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod if (feature->start == 0 && feature->end == (unsigned int) -1) 1911ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod global_mask |= value; 192e53d77142ac4ecbe38ab3235491fa93cb7ff16abBehdad Esfahbod else 1931ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod buffer->or_masks (mask, feature->start, feature->end); 1947f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod } 1957f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod 1961ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod if (global_mask) 1971ce7b87c4d8d1ab3ec1d5198351d71b7199f7c64Behdad Esfahbod buffer->or_masks (global_mask, 0, (unsigned int) -1); 198e53d77142ac4ecbe38ab3235491fa93cb7ff16abBehdad Esfahbod 1992014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod qsort (lookups, *num_lookups, sizeof (lookups[0]), cmp_lookups); 2002014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2012014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (*num_lookups) 2022014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod { 2032014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod for (i = 1, j = 0; i < *num_lookups; i++) 2046b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod if (lookups[i].index != lookups[j].index) 2052014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod lookups[++j] = lookups[i]; 2066b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod else 2076b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod lookups[j].mask |= lookups[i].mask; 2086b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod j++; 2092014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod *num_lookups = j; 2102014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod } 2112014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 2122014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2132014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 214ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic hb_bool_t 215ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_ot_substitute_complex (hb_font_t *font HB_UNUSED, 216ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_face_t *face, 217ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_t *buffer, 218ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_feature_t *features, 219074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod unsigned int num_features, 220074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod hb_direction_t original_direction) 2212014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 2226b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod lookup_map lookups[1000]; 2232014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int num_lookups = ARRAY_LENGTH (lookups); 2242014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int i; 2252014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2262014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (!hb_ot_layout_has_substitution (face)) 2272014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod return FALSE; 2282014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2294206e9511a222c0c50cc9b4fe72ec421983bba2cBehdad Esfahbod setup_lookups (face, buffer, features, num_features, 2302014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_OT_TAG_GSUB, 231074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod lookups, &num_lookups, 232074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod original_direction); 2332014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2342014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod for (i = 0; i < num_lookups; i++) 2356b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod hb_ot_layout_substitute_lookup (face, buffer, lookups[i].index, lookups[i].mask); 2362014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 237e70f45eb522bcb41388cc218b79bbd6aaecf8050Behdad Esfahbod return TRUE; 2382014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 2392014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 240ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic hb_bool_t 241ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_ot_position_complex (hb_font_t *font, 242ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_face_t *face, 243ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_t *buffer, 244ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_feature_t *features, 245074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod unsigned int num_features, 246074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod hb_direction_t original_direction) 2472014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 2486b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod lookup_map lookups[1000]; 2492014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int num_lookups = ARRAY_LENGTH (lookups); 2502014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int i; 2512014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2522014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (!hb_ot_layout_has_positioning (face)) 2532014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod return FALSE; 2542014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2554206e9511a222c0c50cc9b4fe72ec421983bba2cBehdad Esfahbod setup_lookups (face, buffer, features, num_features, 2562014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_OT_TAG_GPOS, 257074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod lookups, &num_lookups, 258074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod original_direction); 2592014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2602014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod for (i = 0; i < num_lookups; i++) 2616b1b957f6d2955cbe4fa97e2659e033b3eaaf4d2Behdad Esfahbod hb_ot_layout_position_lookup (font, face, buffer, lookups[i].index, lookups[i].mask); 2622014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2632014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_position_finish (font, face, buffer); 2642014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 265e70f45eb522bcb41388cc218b79bbd6aaecf8050Behdad Esfahbod return TRUE; 2662014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 267ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 268ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 269ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Main shaper */ 270ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 271ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Prepare */ 272ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 273ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic inline hb_bool_t 274ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodis_variation_selector (hb_codepoint_t unicode) 275ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 276ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod return unlikely ((unicode >= 0x180B && unicode <= 0x180D) || /* MONGOLIAN FREE VARIATION SELECTOR ONE..THREE */ 277ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod (unicode >= 0xFE00 && unicode <= 0xFE0F) || /* VARIATION SELECTOR-1..16 */ 278ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod (unicode >= 0xE0100 && unicode <= 0xE01EF)); /* VARIATION SELECTOR-17..256 */ 279ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 280ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 281ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 282ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_form_clusters (hb_buffer_t *buffer) 283ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 284ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int count = buffer->len; 285ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 1; i < count; i++) 286ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (buffer->unicode->get_general_category (buffer->info[i].codepoint) == HB_CATEGORY_NON_SPACING_MARK) 287ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->info[i].cluster = buffer->info[i - 1].cluster; 288ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 289ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 290ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic hb_direction_t 291ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_ensure_native_direction (hb_buffer_t *buffer) 292ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 293ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_direction_t original_direction = buffer->direction; 294ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 295ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod /* TODO vertical */ 296ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (HB_DIRECTION_IS_HORIZONTAL (original_direction) && 297ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod original_direction != _hb_script_get_horizontal_direction (buffer->script)) 298ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod { 299ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_reverse_clusters (buffer); 300ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->direction = HB_DIRECTION_REVERSE (buffer->direction); 301ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 302ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 303ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod return original_direction; 304ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 305ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 306ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 307ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Substitute */ 308ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 309ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 310ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_mirror_chars (hb_buffer_t *buffer) 311ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 312ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_unicode_get_mirroring_func_t get_mirroring = buffer->unicode->get_mirroring; 313ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 314ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (HB_DIRECTION_IS_FORWARD (buffer->direction)) 315ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod return; 316ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 317ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int count = buffer->len; 318ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 0; i < count; i++) { 3191094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod hb_codepoint_t codepoint = get_mirroring (buffer->info[i].codepoint); 3201094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod if (likely (codepoint == buffer->info[i].codepoint)) 3211094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod buffer->info[i].mask |= MASK_RTLM; 3221094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod else 3231094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod buffer->info[i].codepoint = codepoint; 324ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 325ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 326ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 327ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 328ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_map_glyphs (hb_font_t *font, 329ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_face_t *face, 330ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_t *buffer) 331ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 332ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (unlikely (!buffer->len)) 333ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod return; 334ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 335ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int count = buffer->len - 1; 336ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 0; i < count; i++) { 337ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (unlikely (is_variation_selector (buffer->info[i + 1].codepoint))) { 338ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->info[i].codepoint = hb_font_get_glyph (font, face, buffer->info[i].codepoint, buffer->info[i + 1].codepoint); 339ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod i++; 340ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } else { 341ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->info[i].codepoint = hb_font_get_glyph (font, face, buffer->info[i].codepoint, 0); 342ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 343ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 344ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->info[count].codepoint = hb_font_get_glyph (font, face, buffer->info[count].codepoint, 0); 345ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 346ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 347ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 348ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_substitute_default (hb_font_t *font, 349ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_face_t *face, 350ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_t *buffer, 351ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_feature_t *features HB_UNUSED, 352ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int num_features HB_UNUSED) 353ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 354ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_mirror_chars (buffer); 355ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_map_glyphs (font, face, buffer); 356ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 357ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 358ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 3599722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbodhb_substitute_complex_fallback (hb_font_t *font HB_UNUSED, 3609722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_face_t *face HB_UNUSED, 3619722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_buffer_t *buffer HB_UNUSED, 3629722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_feature_t *features HB_UNUSED, 3639722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod unsigned int num_features HB_UNUSED) 364ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 365ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod /* TODO Arabic */ 366ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 367ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 368ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 369ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Position */ 370ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 371ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 372ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_position_default (hb_font_t *font, 373ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_face_t *face, 374ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_t *buffer, 375ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_feature_t *features HB_UNUSED, 376ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int num_features HB_UNUSED) 377ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 378ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_clear_positions (buffer); 379ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 380ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int count = buffer->len; 381ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 0; i < count; i++) { 382ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_glyph_metrics_t metrics; 383ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_font_get_glyph_metrics (font, face, buffer->info[i].codepoint, &metrics); 384ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->pos[i].x_advance = metrics.x_advance; 385ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->pos[i].y_advance = metrics.y_advance; 386ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 387ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 388ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 389ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 3909722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbodhb_position_complex_fallback (hb_font_t *font HB_UNUSED, 3919722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_face_t *face HB_UNUSED, 3929722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_buffer_t *buffer HB_UNUSED, 3939722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_feature_t *features HB_UNUSED, 3949722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod unsigned int num_features HB_UNUSED) 395ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 396ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod /* TODO Mark pos */ 397ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 398ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 399ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 400ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_truetype_kern (hb_font_t *font, 401ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_face_t *face, 402ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_t *buffer, 403ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_feature_t *features HB_UNUSED, 404ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int num_features HB_UNUSED) 405ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 406ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod /* TODO Check for kern=0 */ 407ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int count = buffer->len; 408ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 1; i < count; i++) { 409ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_position_t kern, kern1, kern2; 410ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod kern = hb_font_get_kerning (font, face, buffer->info[i - 1].codepoint, buffer->info[i].codepoint); 411ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod kern1 = kern >> 1; 412ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod kern2 = kern - kern1; 413ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->pos[i - 1].x_advance += kern1; 414ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->pos[i].x_advance += kern2; 415ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->pos[i].x_offset += kern2; 416ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 417ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 418ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 419ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 4209722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbodhb_position_complex_fallback_visual (hb_font_t *font, 4219722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_face_t *face, 4229722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_buffer_t *buffer, 4239722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_feature_t *features, 4249722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod unsigned int num_features) 425ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 426ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_truetype_kern (font, face, buffer, features, num_features); 427ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 428ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 429ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 430ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Do it! */ 431ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 432ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodvoid 433ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_ot_shape (hb_font_t *font, 434ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_face_t *face, 435ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_t *buffer, 436ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_feature_t *features, 437ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int num_features) 438ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 439ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_direction_t original_direction; 440ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_bool_t substitute_fallback, position_fallback; 441ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 442ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_form_clusters (buffer); 443ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 4441094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod /* SUBSTITUTE */ 4451094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod 4461094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod buffer->clear_masks (); 4471094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod 448ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_substitute_default (font, face, buffer, features, num_features); 449ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 450ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod /* We do this after substitute_default because mirroring needs to 451ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod * see the original direction. */ 452ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod original_direction = hb_ensure_native_direction (buffer); 453ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 454074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod substitute_fallback = !hb_ot_substitute_complex (font, face, buffer, features, num_features, original_direction); 455ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 456ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (substitute_fallback) 4579722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_substitute_complex_fallback (font, face, buffer, features, num_features); 458ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 4591094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod 4601094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod /* POSITION */ 4611094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod 4621094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod buffer->clear_masks (); 4631094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod 464ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_position_default (font, face, buffer, features, num_features); 465ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 466074ea787493a37ae8f68d17be7820f13fff57520Behdad Esfahbod position_fallback = !hb_ot_position_complex (font, face, buffer, features, num_features, original_direction); 467ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 468ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (position_fallback) 4699722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_position_complex_fallback (font, face, buffer, features, num_features); 470ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 471ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (HB_DIRECTION_IS_BACKWARD (buffer->direction)) 472ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_reverse (buffer); 473ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 474ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (position_fallback) 4759722b8f005a10fd16e841df4da3ccd80be66e296Behdad Esfahbod hb_position_complex_fallback_visual (font, face, buffer, features, num_features); 476ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 477ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod buffer->direction = original_direction; 478ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 479