hb-ot-shape.cc revision 7f411dbfd9f8d5360c948531ff9f6c3998d1d897
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 2722da7fd94d6318c52df69d70470a85464ffc533dBehdad Esfahbod#include "hb-ot-shape-private.hh" 282014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2922da7fd94d6318c52df69d70470a85464ffc533dBehdad Esfahbod#include "hb-buffer-private.hh" 302014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 312014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod#include "hb-ot-layout.h" 322014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 332014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodhb_tag_t default_features[] = { 342014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod /* GSUB */ 352014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('c','c','m','p'), 362014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('l','o','c','l'), 372014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('l','i','g','a'), 382014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('c','l','i','g'), 392014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod /* GPOS */ 402014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('k','e','r','n'), 412014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('m','a','r','k'), 422014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('m','k','m','k'), 432014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod}; 442014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 452014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 462014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodstatic void 472014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodadd_feature (hb_face_t *face, 482014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_tag_t table_tag, 492014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int feature_index, 502014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int *lookups, 512014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int *num_lookups, 522014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int room_lookups) 532014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 542014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int i = room_lookups - *num_lookups; 552014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_feature_get_lookup_indexes (face, table_tag, feature_index, 0, 562014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod &i, 572014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod lookups + *num_lookups); 582014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod *num_lookups += i; 592014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 602014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 612014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodstatic int 622014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodcmp_lookups (const void *p1, const void *p2) 632014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 642014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int a = * (const unsigned int *) p1; 652014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int b = * (const unsigned int *) p2; 662014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 672014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod return a - b; 682014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 692014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 702014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodstatic void 714206e9511a222c0c50cc9b4fe72ec421983bba2cBehdad Esfahbodsetup_lookups (hb_face_t *face, 722014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_buffer_t *buffer, 732014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_feature_t *features, 742014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int num_features, 752014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_tag_t table_tag, 762014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int *lookups, 772014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int *num_lookups) 782014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 792014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int i, j, script_index, language_index, feature_index, room_lookups; 802014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 812014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod room_lookups = *num_lookups; 822014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod *num_lookups = 0; 832014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 842014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_table_choose_script (face, table_tag, 852014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_tags_from_script (buffer->script), 862014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod &script_index); 872014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_script_find_language (face, table_tag, script_index, 882014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_tag_from_language (buffer->language), 892014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod &language_index); 902014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 912014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (hb_ot_layout_language_get_required_feature_index (face, table_tag, script_index, language_index, 922014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod &feature_index)) 932014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod add_feature (face, table_tag, feature_index, lookups, num_lookups, room_lookups); 942014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 952014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod for (i = 0; i < ARRAY_LENGTH (default_features); i++) 962014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod { 972014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (hb_ot_layout_language_find_feature (face, table_tag, script_index, language_index, 982014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod default_features[i], 992014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod &feature_index)) 1002014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod add_feature (face, table_tag, feature_index, lookups, num_lookups, room_lookups); 1012014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod } 1022014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1037f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod for (i = 0; i < num_features; i++) 1047f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod { 1057f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod if (hb_ot_layout_language_find_feature (face, table_tag, script_index, language_index, 1067f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod features[i].tag, 1077f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod &feature_index)) 1087f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod add_feature (face, table_tag, feature_index, lookups, num_lookups, room_lookups); 1097f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod } 1107f411dbfd9f8d5360c948531ff9f6c3998d1d897Behdad Esfahbod 1112014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod qsort (lookups, *num_lookups, sizeof (lookups[0]), cmp_lookups); 1122014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1132014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (*num_lookups) 1142014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod { 1152014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod for (i = 1, j = 0; i < *num_lookups; i++) 1162014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (lookups[i] != lookups[j]) 1172014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod lookups[++j] = lookups[i]; 1182014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod lookups[j++] = lookups[i - 1]; 1192014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod *num_lookups = j; 1202014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod } 1212014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 1222014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1232014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1242f78c17197892b2bdc2f64caeb1c1c806ef44545Behdad Esfahbodhb_bool_t 12533d13fdda99acaeffa9600737e8870278d053ebeBehdad Esfahbod_hb_ot_substitute_complex (hb_font_t *font HB_UNUSED, 1262014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_face_t *face, 1272014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_buffer_t *buffer, 1282014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_feature_t *features, 1292014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int num_features) 1302014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 1312014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int lookups[1000]; 1322014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int num_lookups = ARRAY_LENGTH (lookups); 1332014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int i; 1342014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1352014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (!hb_ot_layout_has_substitution (face)) 1362014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod return FALSE; 1372014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1384206e9511a222c0c50cc9b4fe72ec421983bba2cBehdad Esfahbod setup_lookups (face, buffer, features, num_features, 1392014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_OT_TAG_GSUB, 1402014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod lookups, &num_lookups); 1412014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1422014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod for (i = 0; i < num_lookups; i++) 1432014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_substitute_lookup (face, buffer, lookups[i], 0xFFFF); 1442014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 145e70f45eb522bcb41388cc218b79bbd6aaecf8050Behdad Esfahbod return TRUE; 1462014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 1472014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1482f78c17197892b2bdc2f64caeb1c1c806ef44545Behdad Esfahbodhb_bool_t 1492014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod_hb_ot_position_complex (hb_font_t *font, 1502014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_face_t *face, 1512014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_buffer_t *buffer, 1522014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_feature_t *features, 1532014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int num_features) 1542014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 1552014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int lookups[1000]; 1562014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int num_lookups = ARRAY_LENGTH (lookups); 1572014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod unsigned int i; 1582014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1592014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod if (!hb_ot_layout_has_positioning (face)) 1602014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod return FALSE; 1612014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1624206e9511a222c0c50cc9b4fe72ec421983bba2cBehdad Esfahbod setup_lookups (face, buffer, features, num_features, 1632014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_OT_TAG_GPOS, 1642014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod lookups, &num_lookups); 1652014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1662014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod for (i = 0; i < num_lookups; i++) 1672014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_position_lookup (font, face, buffer, lookups[i], 0xFFFF); 1682014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1692014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod hb_ot_layout_position_finish (font, face, buffer); 1702014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 171e70f45eb522bcb41388cc218b79bbd6aaecf8050Behdad Esfahbod return TRUE; 1722014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 173