hb-ot-shape.cc revision 2409d5f8d7dd8b535ce5ea29e933f7db27d33793
12014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod/* 22409d5f8d7dd8b535ce5ea29e933f7db27d33793Behdad Esfahbod * Copyright © 2009,2010 Red Hat, Inc. 32409d5f8d7dd8b535ce5ea29e933f7db27d33793Behdad Esfahbod * Copyright © 2010 Google, Inc. 42014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 5c755cb3e3ac55156d0d2ec05adea7a650b97cc41Behdad Esfahbod * This is part of HarfBuzz, a text shaping library. 62014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 72014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * Permission is hereby granted, without written agreement and without 82014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * license or royalty fees, to use, copy, modify, and distribute this 92014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * software and its documentation for any purpose, provided that the 102014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * above copyright notice and the following two paragraphs appear in 112014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * all copies of this software. 122014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 132014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 142014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 152014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 162014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 172014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * DAMAGE. 182014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 192014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 202014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 212014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 222014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 232014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 242014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * 252014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod * Red Hat Author(s): Behdad Esfahbod 26476c94218b4f5b8e119e82b0e10b641e0c10bf56Behdad Esfahbod * Google Author(s): Behdad Esfahbod 272014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod */ 282014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 294924affe0f0adf75f2a0e2137a71206b0576d63fBehdad Esfahbod#include "hb-ot-shape-private.hh" 3013403bc67a01e0d4908fb964093fd02ddd11c580Behdad Esfahbod#include "hb-ot-shape-complex-private.hh" 312014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 32acdba3f90b232fc12fcb200dca2584481b339118Behdad EsfahbodHB_BEGIN_DECLS 33acdba3f90b232fc12fcb200dca2584481b339118Behdad Esfahbod 34acdba3f90b232fc12fcb200dca2584481b339118Behdad Esfahbod 3575f3469ca6d626b08eb411984a2ba7fd48ca5b5fBehdad Esfahbod/* XXX vertical */ 362014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodhb_tag_t default_features[] = { 37bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('c','a','l','t'), 382014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('c','c','m','p'), 392014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('c','l','i','g'), 40bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('c','u','r','s'), 412014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('k','e','r','n'), 42bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('l','i','g','a'), 43bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('l','o','c','l'), 442014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('m','a','r','k'), 452014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('m','k','m','k'), 46bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('r','l','i','g') 472014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod}; 482014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 492014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodstatic void 50605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbodhb_ot_shape_collect_features (hb_ot_shape_plan_t *plan, 5149baa1f69efb0e3c62e45bd59dd88459a84bf390Behdad Esfahbod const hb_segment_properties_t *props, 52895fb5d364e7ae5d9d2e34b9f68b8651804369efBehdad Esfahbod const hb_feature_t *user_features, 53895fb5d364e7ae5d9d2e34b9f68b8651804369efBehdad Esfahbod unsigned int num_user_features) 542014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 55895fb5d364e7ae5d9d2e34b9f68b8651804369efBehdad Esfahbod switch (props->direction) { 560e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod case HB_DIRECTION_LTR: 57605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod plan->map.add_bool_feature (HB_TAG ('l','t','r','a')); 58605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod plan->map.add_bool_feature (HB_TAG ('l','t','r','m')); 590e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod break; 600e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod case HB_DIRECTION_RTL: 61605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod plan->map.add_bool_feature (HB_TAG ('r','t','l','a')); 62605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod plan->map.add_bool_feature (HB_TAG ('r','t','l','m'), false); 630e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod break; 640e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod case HB_DIRECTION_TTB: 650e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod case HB_DIRECTION_BTT: 663286fc0e9adc3f2874c9409e7fdb09e4d2b7dda1Behdad Esfahbod case HB_DIRECTION_INVALID: 670e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod default: 680e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod break; 690e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod } 700e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod 71d9c726078828d50db62e05407a3f38f2e7607533Behdad Esfahbod for (unsigned int i = 0; i < ARRAY_LENGTH (default_features); i++) 72605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod plan->map.add_bool_feature (default_features[i]); 73e04685ee7be01695ec437fab50f919f1b7423c57Behdad Esfahbod 7449baa1f69efb0e3c62e45bd59dd88459a84bf390Behdad Esfahbod hb_ot_shape_complex_collect_features (plan, props); 75e04685ee7be01695ec437fab50f919f1b7423c57Behdad Esfahbod 76895fb5d364e7ae5d9d2e34b9f68b8651804369efBehdad Esfahbod for (unsigned int i = 0; i < num_user_features; i++) { 77895fb5d364e7ae5d9d2e34b9f68b8651804369efBehdad Esfahbod const hb_feature_t *feature = &user_features[i]; 78605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod plan->map.add_feature (feature->tag, feature->value, (feature->start == 0 && feature->end == (unsigned int) -1)); 79e04685ee7be01695ec437fab50f919f1b7423c57Behdad Esfahbod } 80e89b7d2a61b7f58e6c7cec00d5ce2246dee1e8a1Behdad Esfahbod} 81e89b7d2a61b7f58e6c7cec00d5ce2246dee1e8a1Behdad Esfahbod 82e89b7d2a61b7f58e6c7cec00d5ce2246dee1e8a1Behdad Esfahbod 83e89b7d2a61b7f58e6c7cec00d5ce2246dee1e8a1Behdad Esfahbodstatic void 8452601275d5e4000dada4f925fb78723eeeee7bd4Behdad Esfahbodhb_ot_shape_setup_masks (hb_ot_shape_context_t *c) 85e89b7d2a61b7f58e6c7cec00d5ce2246dee1e8a1Behdad Esfahbod{ 86605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod hb_mask_t global_mask = c->plan->map.get_global_mask (); 8757ac0ecb7843533b2e6e6d6c8a12b2a44437cc1cBehdad Esfahbod c->buffer->reset_masks (global_mask); 885b88908f12ad1d828dd6075fb8fc0036c2d6af3aBehdad Esfahbod 893a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod hb_ot_shape_complex_setup_masks (c); /* BUFFER: Clobbers var2 */ 902989be4919242670c94825bded96db20a7b2035bBehdad Esfahbod 91d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod for (unsigned int i = 0; i < c->num_user_features; i++) 92efe0d682e860ffd23a1d17c68c8273f17d51c1c9Behdad Esfahbod { 93d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod const hb_feature_t *feature = &c->user_features[i]; 944924affe0f0adf75f2a0e2137a71206b0576d63fBehdad Esfahbod if (!(feature->start == 0 && feature->end == (unsigned int)-1)) { 954924affe0f0adf75f2a0e2137a71206b0576d63fBehdad Esfahbod unsigned int shift; 96605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod hb_mask_t mask = c->plan->map.get_mask (feature->tag, &shift); 97bd7378b2ef9793de4e7f57b920f29f48ac9d0c25Behdad Esfahbod c->buffer->set_masks (feature->value << shift, mask, feature->start, feature->end); 984924affe0f0adf75f2a0e2137a71206b0576d63fBehdad Esfahbod } 99efe0d682e860ffd23a1d17c68c8273f17d51c1c9Behdad Esfahbod } 1002014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 1012014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1022014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 103967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodstatic void 10436925f695d349a53d52ecc3a58f18240a6977463Behdad Esfahbodhb_ot_substitute_complex (hb_ot_shape_context_t *c) 1052014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 106967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod if (!hb_ot_layout_has_substitution (c->face)) 107967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod return; 1082014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 109605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod c->plan->map.substitute (c->face, c->buffer); 1102014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 111967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod c->applied_substitute_complex = TRUE; 112967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod return; 1132014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 1142014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 115967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodstatic void 11636925f695d349a53d52ecc3a58f18240a6977463Behdad Esfahbodhb_ot_position_complex (hb_ot_shape_context_t *c) 1172014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 1182014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 119967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod if (!hb_ot_layout_has_positioning (c->face)) 120967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod return; 1212014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 122605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod c->plan->map.position (c->font, c->face, c->buffer); 1232014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 1241e7c1fcbc33599faefc32d4a28e5d8506d2c56faBehdad Esfahbod hb_ot_layout_position_finish (c->buffer); 1252014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 126967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod c->applied_position_complex = TRUE; 127967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod return; 1282014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod} 129ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 130ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 131ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Main shaper */ 132ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 133ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Prepare */ 134ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 135ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic inline hb_bool_t 136ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodis_variation_selector (hb_codepoint_t unicode) 137ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 138ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod return unlikely ((unicode >= 0x180B && unicode <= 0x180D) || /* MONGOLIAN FREE VARIATION SELECTOR ONE..THREE */ 139ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod (unicode >= 0xFE00 && unicode <= 0xFE0F) || /* VARIATION SELECTOR-1..16 */ 140ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod (unicode >= 0xE0100 && unicode <= 0xE01EF)); /* VARIATION SELECTOR-17..256 */ 141ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 142ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 143ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 1443a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbodhb_set_unicode_props (hb_ot_shape_context_t *c) 1453a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod{ 146fb194b8794898f51eb596fa4092c26606889d376Behdad Esfahbod hb_unicode_funcs_t *unicode = c->buffer->unicode; 1473a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod hb_glyph_info_t *info = c->buffer->info; 1483a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod 1493a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod unsigned int count = c->buffer->len; 1503a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod for (unsigned int i = 1; i < count; i++) { 151fb194b8794898f51eb596fa4092c26606889d376Behdad Esfahbod info[i].general_category() = unicode->get_general_category (info[i].codepoint); 152fb194b8794898f51eb596fa4092c26606889d376Behdad Esfahbod info[i].combining_class() = unicode->get_combining_class (info[i].codepoint); 1533a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod } 1543a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod} 1553a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod 1563a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbodstatic void 1576b7e6758626268ba1c7c266128e618ec73ae2c0fBehdad Esfahbodhb_form_clusters (hb_ot_shape_context_t *c) 158ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 1596b7e6758626268ba1c7c266128e618ec73ae2c0fBehdad Esfahbod unsigned int count = c->buffer->len; 160ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 1; i < count; i++) 16199b74760a4cddc798ab44b5ca897486bbb9c76d6Behdad Esfahbod if (c->buffer->info[i].general_category() == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) 1626b7e6758626268ba1c7c266128e618ec73ae2c0fBehdad Esfahbod c->buffer->info[i].cluster = c->buffer->info[i - 1].cluster; 163ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 164ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 165967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodstatic void 1666b7e6758626268ba1c7c266128e618ec73ae2c0fBehdad Esfahbodhb_ensure_native_direction (hb_ot_shape_context_t *c) 167ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 1686b7e6758626268ba1c7c266128e618ec73ae2c0fBehdad Esfahbod hb_direction_t direction = c->buffer->props.direction; 169ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 170ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod /* TODO vertical */ 171967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod if (HB_DIRECTION_IS_HORIZONTAL (direction) && 1723286fc0e9adc3f2874c9409e7fdb09e4d2b7dda1Behdad Esfahbod direction != hb_script_get_horizontal_direction (c->buffer->props.script)) 173ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod { 1746b7e6758626268ba1c7c266128e618ec73ae2c0fBehdad Esfahbod hb_buffer_reverse_clusters (c->buffer); 1756b7e6758626268ba1c7c266128e618ec73ae2c0fBehdad Esfahbod c->buffer->props.direction = HB_DIRECTION_REVERSE (c->buffer->props.direction); 176ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 177ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 178ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 17998370e89d1bff248737b482d129c2a4deb8bfd95Behdad Esfahbodstatic void 18098370e89d1bff248737b482d129c2a4deb8bfd95Behdad Esfahbodhb_reset_glyph_infos (hb_ot_shape_context_t *c) 18198370e89d1bff248737b482d129c2a4deb8bfd95Behdad Esfahbod{ 18298370e89d1bff248737b482d129c2a4deb8bfd95Behdad Esfahbod unsigned int count = c->buffer->len; 18398370e89d1bff248737b482d129c2a4deb8bfd95Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 18498370e89d1bff248737b482d129c2a4deb8bfd95Behdad Esfahbod c->buffer->info[i].var1.u32 = c->buffer->info[i].var2.u32 = 0; 18598370e89d1bff248737b482d129c2a4deb8bfd95Behdad Esfahbod} 18698370e89d1bff248737b482d129c2a4deb8bfd95Behdad Esfahbod 187ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 188ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Substitute */ 189ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 190ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 191aa9c450bb2d7c3c9e36ea32e3558250391a0582dBehdad Esfahbodhb_mirror_chars (hb_ot_shape_context_t *c) 192ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 193fb194b8794898f51eb596fa4092c26606889d376Behdad Esfahbod hb_unicode_funcs_t *unicode = c->buffer->unicode; 194ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 195bbbbe80ec9bc45c5b685bc09c8f993e98496555cBehdad Esfahbod if (HB_DIRECTION_IS_FORWARD (c->target_direction)) 196ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod return; 197ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 19839dede9ffffe732f78cbd092ccb3b48d77ddd66dBehdad Esfahbod hb_mask_t rtlm_mask = c->plan->map.get_1_mask (HB_TAG ('r','t','l','m')); 1994e4ef24e46f273ad2bdda2f718223e05b37dd50fBehdad Esfahbod 200aa9c450bb2d7c3c9e36ea32e3558250391a0582dBehdad Esfahbod unsigned int count = c->buffer->len; 201ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 0; i < count; i++) { 202fb194b8794898f51eb596fa4092c26606889d376Behdad Esfahbod hb_codepoint_t codepoint = unicode->get_mirroring (c->buffer->info[i].codepoint); 203aa9c450bb2d7c3c9e36ea32e3558250391a0582dBehdad Esfahbod if (likely (codepoint == c->buffer->info[i].codepoint)) 204bd7378b2ef9793de4e7f57b920f29f48ac9d0c25Behdad Esfahbod c->buffer->info[i].mask |= rtlm_mask; /* XXX this should be moved to before setting user-feature masks */ 2051094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod else 206aa9c450bb2d7c3c9e36ea32e3558250391a0582dBehdad Esfahbod c->buffer->info[i].codepoint = codepoint; 207ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 208ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 209ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 210ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 211ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodhb_map_glyphs (hb_font_t *font, 212ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_face_t *face, 213ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_buffer_t *buffer) 214ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 215ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod if (unlikely (!buffer->len)) 216ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod return; 217ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 218a224b4d502d026fa642ee4098bf7bc0b4ba7ce27Behdad Esfahbod buffer->clear_output (); 219ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod unsigned int count = buffer->len - 1; 220a224b4d502d026fa642ee4098bf7bc0b4ba7ce27Behdad Esfahbod for (buffer->i = 0; buffer->i < count;) { 221a224b4d502d026fa642ee4098bf7bc0b4ba7ce27Behdad Esfahbod if (unlikely (is_variation_selector (buffer->info[buffer->i + 1].codepoint))) { 222dd2ffd282c059194fd87fb1664e2e0cdb56a87a0Behdad Esfahbod buffer->replace_glyph (hb_font_get_glyph (font, face, buffer->info[buffer->i].codepoint, buffer->info[buffer->i + 1].codepoint)); 223a224b4d502d026fa642ee4098bf7bc0b4ba7ce27Behdad Esfahbod buffer->i++; 224ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } else { 225dd2ffd282c059194fd87fb1664e2e0cdb56a87a0Behdad Esfahbod buffer->replace_glyph (hb_font_get_glyph (font, face, buffer->info[buffer->i].codepoint, 0)); 226ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 227ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 228f2a1b411b1d48c3dfac0df8e78c848d9aa3bb047Behdad Esfahbod if (likely (buffer->i < buffer->len)) 229dd2ffd282c059194fd87fb1664e2e0cdb56a87a0Behdad Esfahbod buffer->replace_glyph (hb_font_get_glyph (font, face, buffer->info[buffer->i].codepoint, 0)); 230a224b4d502d026fa642ee4098bf7bc0b4ba7ce27Behdad Esfahbod buffer->swap (); 231ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 232ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 233ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 234967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodhb_substitute_default (hb_ot_shape_context_t *c) 235ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 236967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod hb_map_glyphs (c->font, c->face, c->buffer); 237ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 238ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 239ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 240967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodhb_substitute_complex_fallback (hb_ot_shape_context_t *c HB_UNUSED) 241ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 242ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod /* TODO Arabic */ 243ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 244ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 245ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 246ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Position */ 247ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 248ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 249967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodhb_position_default (hb_ot_shape_context_t *c) 250ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 2518f0d7e0c3fd4b05c43ac449be4f374dc2dc56127Behdad Esfahbod hb_ot_layout_position_start (c->buffer); 252ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 253967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod unsigned int count = c->buffer->len; 254ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 0; i < count; i++) { 255502f4cba3e0bcd625d31f8fd295b8b18e2d02a5aBehdad Esfahbod hb_font_get_glyph_advance (c->font, c->face, c->buffer->info[i].codepoint, 256502f4cba3e0bcd625d31f8fd295b8b18e2d02a5aBehdad Esfahbod &c->buffer->pos[i].x_advance, 257502f4cba3e0bcd625d31f8fd295b8b18e2d02a5aBehdad Esfahbod &c->buffer->pos[i].y_advance); 258ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 259ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 260ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 261ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 262967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodhb_position_complex_fallback (hb_ot_shape_context_t *c HB_UNUSED) 263ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 264ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod /* TODO Mark pos */ 265ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 266ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 267ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 268967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodhb_truetype_kern (hb_ot_shape_context_t *c) 269ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 270ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod /* TODO Check for kern=0 */ 271967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod unsigned int count = c->buffer->len; 272ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 1; i < count; i++) { 273ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod hb_position_t kern, kern1, kern2; 274967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod kern = hb_font_get_kerning (c->font, c->face, c->buffer->info[i - 1].codepoint, c->buffer->info[i].codepoint); 275ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod kern1 = kern >> 1; 276ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod kern2 = kern - kern1; 277967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod c->buffer->pos[i - 1].x_advance += kern1; 278967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod c->buffer->pos[i].x_advance += kern2; 279967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod c->buffer->pos[i].x_offset += kern2; 280ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 281ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 282ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 283ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbodstatic void 284967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodhb_position_complex_fallback_visual (hb_ot_shape_context_t *c) 285ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 286967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod hb_truetype_kern (c); 287ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 288ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 289ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 290ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Do it! */ 291ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 292967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodstatic void 293fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbodhb_ot_shape_execute_internal (hb_ot_shape_context_t *c) 294ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 295d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod /* Save the original direction, we use it later. */ 296bbbbe80ec9bc45c5b685bc09c8f993e98496555cBehdad Esfahbod c->target_direction = c->buffer->props.direction; 297d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod 2983a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod hb_reset_glyph_infos (c); /* BUFFER: Clear buffer var1 and var2 */ 299ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 3003a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod hb_set_unicode_props (c); /* BUFFER: Set general_category and combining_class in var1 */ 3013a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod 302ee8aaf976a6eb42be49b63b4c51c7a0a338e0298Behdad Esfahbod hb_ensure_native_direction (c); 303ee8aaf976a6eb42be49b63b4c51c7a0a338e0298Behdad Esfahbod 3043a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod hb_form_clusters (c); 305fc96596b7c1c4e62491e951a3c256fb00dcde550Behdad Esfahbod 3063a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod hb_ot_shape_setup_masks (c); /* BUFFER: Clobbers var2 */ 30798370e89d1bff248737b482d129c2a4deb8bfd95Behdad Esfahbod 3081094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod /* SUBSTITUTE */ 309fdc322a82047c4bda9fa3dab4338a0eac1c1bde7Behdad Esfahbod { 310fdc322a82047c4bda9fa3dab4338a0eac1c1bde7Behdad Esfahbod /* Mirroring needs to see the original direction */ 311aa9c450bb2d7c3c9e36ea32e3558250391a0582dBehdad Esfahbod hb_mirror_chars (c); 312ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 313967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod hb_substitute_default (c); 314bbc7a99d01298f9be1ebaaceacbc9bc961e247e5Behdad Esfahbod 31536925f695d349a53d52ecc3a58f18240a6977463Behdad Esfahbod hb_ot_substitute_complex (c); 316ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 317967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod if (!c->applied_substitute_complex) 318967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod hb_substitute_complex_fallback (c); 319fdc322a82047c4bda9fa3dab4338a0eac1c1bde7Behdad Esfahbod } 3201094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod 3211094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod /* POSITION */ 322fdc322a82047c4bda9fa3dab4338a0eac1c1bde7Behdad Esfahbod { 323967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod hb_position_default (c); 324ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 32536925f695d349a53d52ecc3a58f18240a6977463Behdad Esfahbod hb_ot_position_complex (c); 326ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 327967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod hb_bool_t position_fallback = !c->applied_position_complex; 328fdc322a82047c4bda9fa3dab4338a0eac1c1bde7Behdad Esfahbod if (position_fallback) 329967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod hb_position_complex_fallback (c); 330ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 331967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod if (HB_DIRECTION_IS_BACKWARD (c->buffer->props.direction)) 332967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod hb_buffer_reverse (c->buffer); 333ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 334fdc322a82047c4bda9fa3dab4338a0eac1c1bde7Behdad Esfahbod if (position_fallback) 335967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod hb_position_complex_fallback_visual (c); 336fdc322a82047c4bda9fa3dab4338a0eac1c1bde7Behdad Esfahbod } 337ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 338bbbbe80ec9bc45c5b685bc09c8f993e98496555cBehdad Esfahbod c->buffer->props.direction = c->target_direction; 339967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod} 340967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod 341967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodvoid 342605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbodhb_ot_shape_plan_internal (hb_ot_shape_plan_t *plan, 343d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod hb_face_t *face, 34449baa1f69efb0e3c62e45bd59dd88459a84bf390Behdad Esfahbod const hb_segment_properties_t *props, 345d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod const hb_feature_t *user_features, 346d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod unsigned int num_user_features) 347d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod{ 34849baa1f69efb0e3c62e45bd59dd88459a84bf390Behdad Esfahbod plan->shaper = hb_ot_shape_complex_categorize (props); 34949baa1f69efb0e3c62e45bd59dd88459a84bf390Behdad Esfahbod 350605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod hb_ot_shape_collect_features (plan, props, user_features, num_user_features); 351d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod 352605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod plan->map.compile (face, props); 353d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod} 354d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod 355d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbodvoid 356fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbodhb_ot_shape_execute (hb_ot_shape_plan_t *plan, 357fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod hb_font_t *font, 358fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod hb_face_t *face, 359fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod hb_buffer_t *buffer, 360fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod const hb_feature_t *user_features, 361fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod unsigned int num_user_features) 362fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod{ 363fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod hb_ot_shape_context_t c = {plan, font, face, buffer, user_features, num_user_features}; 364fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod hb_ot_shape_execute_internal (&c); 365fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod} 366fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod 367fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbodvoid 3685814dfa3f5aa41bc3df06b78980d57d7bea0ba58Behdad Esfahbodhb_ot_shape (hb_font_t *font, 3695814dfa3f5aa41bc3df06b78980d57d7bea0ba58Behdad Esfahbod hb_face_t *face, 3705814dfa3f5aa41bc3df06b78980d57d7bea0ba58Behdad Esfahbod hb_buffer_t *buffer, 3715814dfa3f5aa41bc3df06b78980d57d7bea0ba58Behdad Esfahbod const hb_feature_t *features, 3725814dfa3f5aa41bc3df06b78980d57d7bea0ba58Behdad Esfahbod unsigned int num_features) 373967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod{ 374605ed468f380f86d642031f6451447d270cb6de1Behdad Esfahbod hb_ot_shape_plan_t plan; 375967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod 3765814dfa3f5aa41bc3df06b78980d57d7bea0ba58Behdad Esfahbod hb_ot_shape_plan_internal (&plan, face, &buffer->props, features, num_features); 3775814dfa3f5aa41bc3df06b78980d57d7bea0ba58Behdad Esfahbod hb_ot_shape_execute (&plan, font, face, buffer, features, num_features); 378ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 379acdba3f90b232fc12fcb200dca2584481b339118Behdad Esfahbod 380acdba3f90b232fc12fcb200dca2584481b339118Behdad Esfahbod 381acdba3f90b232fc12fcb200dca2584481b339118Behdad EsfahbodHB_END_DECLS 382