hb-ot-shape.cc revision 798e4185bc71b1a63528e6b0af236d4c964ec607
12014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod/* 22409d5f8d7dd8b535ce5ea29e933f7db27d33793Behdad Esfahbod * Copyright © 2009,2010 Red Hat, Inc. 307d682806349aee81f53114778ce0beb23909ed7Behdad Esfahbod * Copyright © 2010,2011,2012 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 29027857d0412477fb4427dcb8a8c45287c272e143Behdad Esfahbod#define HB_SHAPER ot 30027857d0412477fb4427dcb8a8c45287c272e143Behdad Esfahbod#define hb_ot_shaper_face_data_t hb_ot_layout_t 31e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod#define hb_ot_shaper_shape_plan_data_t hb_ot_shape_plan_t 32027857d0412477fb4427dcb8a8c45287c272e143Behdad Esfahbod#include "hb-shaper-impl-private.hh" 33027857d0412477fb4427dcb8a8c45287c272e143Behdad Esfahbod 344924affe0f0adf75f2a0e2137a71206b0576d63fBehdad Esfahbod#include "hb-ot-shape-private.hh" 3516c6a27b4bffc19026944c7bea9cf0a3a8ff1d8fBehdad Esfahbod#include "hb-ot-shape-complex-private.hh" 369c929abdcfef44c0193a2917b20981df37ade21cBehdad Esfahbod#include "hb-ot-shape-fallback-private.hh" 37affaf8a0e5aa38e5820455f789eebf916e02eb7bBehdad Esfahbod#include "hb-ot-shape-normalize-private.hh" 382014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 39b70021f7c81a0ed08475b14b07291f662cd9f905Behdad Esfahbod#include "hb-ot-layout-private.hh" 401827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod#include "hb-set-private.hh" 4172657e4ce757dcb055a8db7291b68f96f0d34bfbBehdad Esfahbod 42acdba3f90b232fc12fcb200dca2584481b339118Behdad Esfahbod 43a02d86484be870615297abfc7be9f94645434762Behdad Esfahbodstatic hb_tag_t common_features[] = { 442014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('c','c','m','p'), 45a5f1834f57ea3fb254f5c7d372747de316fcc8f1Behdad Esfahbod HB_TAG('l','i','g','a'), 4689a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod HB_TAG('l','o','c','l'), 4789a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod HB_TAG('m','a','r','k'), 4889a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod HB_TAG('m','k','m','k'), 4989a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod HB_TAG('r','l','i','g'), 5089a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod}; 5189a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod 52d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod 53a02d86484be870615297abfc7be9f94645434762Behdad Esfahbodstatic hb_tag_t horizontal_features[] = { 5489a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod HB_TAG('c','a','l','t'), 552014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('c','l','i','g'), 56bd0987386b3a4dddf208ccf1a70ebfff6242ba73Behdad Esfahbod HB_TAG('c','u','r','s'), 572014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod HB_TAG('k','e','r','n'), 58f4e48adcdd4315ce09e755f87a0f801d88194f42Behdad Esfahbod HB_TAG('r','c','l','t'), 5989a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod}; 6089a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod 61a02d86484be870615297abfc7be9f94645434762Behdad Esfahbodstatic hb_tag_t vertical_features[] = { 6289a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod HB_TAG('v','e','r','t'), 632014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod}; 642014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 65b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod 66b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod 672014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbodstatic void 6890645fb24bcbb78183576d3641a99560d87e49f2Behdad Esfahbodhb_ot_shape_collect_features (hb_ot_shape_planner_t *planner, 6949baa1f69efb0e3c62e45bd59dd88459a84bf390Behdad Esfahbod const hb_segment_properties_t *props, 7090645fb24bcbb78183576d3641a99560d87e49f2Behdad Esfahbod const hb_feature_t *user_features, 7190645fb24bcbb78183576d3641a99560d87e49f2Behdad Esfahbod unsigned int num_user_features) 722014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod{ 738bb5deba9630d35878eb6edb4643ecfabf99f15fBehdad Esfahbod hb_ot_map_builder_t *map = &planner->map; 748bb5deba9630d35878eb6edb4643ecfabf99f15fBehdad Esfahbod 75895fb5d364e7ae5d9d2e34b9f68b8651804369efBehdad Esfahbod switch (props->direction) { 760e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod case HB_DIRECTION_LTR: 77e7ffcfafb1108801ac504f18f820e497226bf07fBehdad Esfahbod map->add_global_bool_feature (HB_TAG ('l','t','r','a')); 78e7ffcfafb1108801ac504f18f820e497226bf07fBehdad Esfahbod map->add_global_bool_feature (HB_TAG ('l','t','r','m')); 790e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod break; 800e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod case HB_DIRECTION_RTL: 81e7ffcfafb1108801ac504f18f820e497226bf07fBehdad Esfahbod map->add_global_bool_feature (HB_TAG ('r','t','l','a')); 82ec5448667b30ad662401c2b4f5fc0da524c013fdBehdad Esfahbod map->add_feature (HB_TAG ('r','t','l','m'), 1, F_NONE); 830e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod break; 840e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod case HB_DIRECTION_TTB: 850e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod case HB_DIRECTION_BTT: 863286fc0e9adc3f2874c9409e7fdb09e4d2b7dda1Behdad Esfahbod case HB_DIRECTION_INVALID: 870e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod default: 880e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod break; 890e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod } 900e235d0fc9bdeeaffa7215c21abc5d40767a10c7Behdad Esfahbod 913aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod map->add_feature (HB_TAG ('f','r','a','c'), 1, F_NONE); 923aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod map->add_feature (HB_TAG ('n','u','m','r'), 1, F_NONE); 933aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod map->add_feature (HB_TAG ('d','n','o','m'), 1, F_NONE); 943aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod 95693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod if (planner->shaper->collect_features) 9616c6a27b4bffc19026944c7bea9cf0a3a8ff1d8fBehdad Esfahbod planner->shaper->collect_features (planner); 97e04685ee7be01695ec437fab50f919f1b7423c57Behdad Esfahbod 98ee9c3a17d0bf263c5eee479fd778db97cff8e189Behdad Esfahbod for (unsigned int i = 0; i < ARRAY_LENGTH (common_features); i++) 99ee9c3a17d0bf263c5eee479fd778db97cff8e189Behdad Esfahbod map->add_global_bool_feature (common_features[i]); 10089a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod 10189a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod if (HB_DIRECTION_IS_HORIZONTAL (props->direction)) 102ee9c3a17d0bf263c5eee479fd778db97cff8e189Behdad Esfahbod for (unsigned int i = 0; i < ARRAY_LENGTH (horizontal_features); i++) 103038c98f6866fe1177b04bd2ae3bb461b2f0fd1edBehdad Esfahbod map->add_feature (horizontal_features[i], 1, F_GLOBAL | 104038c98f6866fe1177b04bd2ae3bb461b2f0fd1edBehdad Esfahbod (horizontal_features[i] == HB_TAG('k','e','r','n') ? 105038c98f6866fe1177b04bd2ae3bb461b2f0fd1edBehdad Esfahbod F_HAS_FALLBACK : F_NONE)); 10689a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod else 107ee9c3a17d0bf263c5eee479fd778db97cff8e189Behdad Esfahbod for (unsigned int i = 0; i < ARRAY_LENGTH (vertical_features); i++) 108038c98f6866fe1177b04bd2ae3bb461b2f0fd1edBehdad Esfahbod map->add_feature (vertical_features[i], 1, F_GLOBAL | 109038c98f6866fe1177b04bd2ae3bb461b2f0fd1edBehdad Esfahbod (vertical_features[i] == HB_TAG('v','k','r','n') ? 110038c98f6866fe1177b04bd2ae3bb461b2f0fd1edBehdad Esfahbod F_HAS_FALLBACK : F_NONE)); 11189a2bc9ba674e7e57fec1fd8ce7648a44f3aab63Behdad Esfahbod 112693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod if (planner->shaper->override_features) 11316c6a27b4bffc19026944c7bea9cf0a3a8ff1d8fBehdad Esfahbod planner->shaper->override_features (planner); 114d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbod 115895fb5d364e7ae5d9d2e34b9f68b8651804369efBehdad Esfahbod for (unsigned int i = 0; i < num_user_features; i++) { 116895fb5d364e7ae5d9d2e34b9f68b8651804369efBehdad Esfahbod const hb_feature_t *feature = &user_features[i]; 117ec5448667b30ad662401c2b4f5fc0da524c013fdBehdad Esfahbod map->add_feature (feature->tag, feature->value, 118ec5448667b30ad662401c2b4f5fc0da524c013fdBehdad Esfahbod (feature->start == 0 && feature->end == (unsigned int) -1) ? 119ec5448667b30ad662401c2b4f5fc0da524c013fdBehdad Esfahbod F_GLOBAL : F_NONE); 120e04685ee7be01695ec437fab50f919f1b7423c57Behdad Esfahbod } 121e89b7d2a61b7f58e6c7cec00d5ce2246dee1e8a1Behdad Esfahbod} 122e89b7d2a61b7f58e6c7cec00d5ce2246dee1e8a1Behdad Esfahbod 123e89b7d2a61b7f58e6c7cec00d5ce2246dee1e8a1Behdad Esfahbod 124e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod/* 125e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod * shaper face data 126e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod */ 127e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 128e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbodhb_ot_shaper_face_data_t * 129e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod_hb_ot_shaper_face_data_create (hb_face_t *face) 130e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod{ 131e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod return _hb_ot_layout_create (face); 132e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod} 133e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 134e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbodvoid 135e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod_hb_ot_shaper_face_data_destroy (hb_ot_shaper_face_data_t *data) 136e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod{ 137e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod _hb_ot_layout_destroy (data); 138e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod} 139e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 140e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 141e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod/* 142e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod * shaper font data 143e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod */ 144e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 145e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbodstruct hb_ot_shaper_font_data_t {}; 146e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 147e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbodhb_ot_shaper_font_data_t * 148e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod_hb_ot_shaper_font_data_create (hb_font_t *font) 149e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod{ 150e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod return (hb_ot_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED; 151e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod} 152e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 153e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbodvoid 154e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod_hb_ot_shaper_font_data_destroy (hb_ot_shaper_font_data_t *data) 155e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod{ 156e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod} 157e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 158e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 159e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod/* 160e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod * shaper shape_plan data 161e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod */ 162e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 163e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbodhb_ot_shaper_shape_plan_data_t * 164e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod_hb_ot_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan, 165e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod const hb_feature_t *user_features, 166e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod unsigned int num_user_features) 167e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod{ 168a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod hb_ot_shape_plan_t *plan = (hb_ot_shape_plan_t *) calloc (1, sizeof (hb_ot_shape_plan_t)); 169a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod if (unlikely (!plan)) 170e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod return NULL; 171e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 1725393e3a62ba09fd7bcf3767b36225c8f49badb9dBehdad Esfahbod hb_ot_shape_planner_t planner (shape_plan); 173e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 1749b37b4c5800b158f61602d2aba8a01349e24d251Behdad Esfahbod planner.shaper = hb_ot_shape_complex_categorize (&planner); 175e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 176e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod hb_ot_shape_collect_features (&planner, &shape_plan->props, user_features, num_user_features); 177e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 178a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod planner.compile (*plan); 179e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 180a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod if (plan->shaper->data_create) { 181a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod plan->data = plan->shaper->data_create (plan); 182a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod if (unlikely (!plan->data)) 183a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod return NULL; 184a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod } 185a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod 186a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod return plan; 187e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod} 188e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 189e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbodvoid 190a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod_hb_ot_shaper_shape_plan_data_destroy (hb_ot_shaper_shape_plan_data_t *plan) 191e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod{ 192a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod if (plan->shaper->data_destroy) 193a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod plan->shaper->data_destroy (const_cast<void *> (plan->data)); 194a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod 195a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod plan->finish (); 1964ba647eecf0f70917ac4229af1f2dd3c62fcb7d5Behdad Esfahbod 197a8c6da90f4c6e8d27a3a1b758a55476776d9f750Behdad Esfahbod free (plan); 198e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod} 199e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 200e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 201e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod/* 202e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod * shaper 203e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod */ 204e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 205b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbodstruct hb_ot_shape_context_t 206b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod{ 207b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod hb_ot_shape_plan_t *plan; 208b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod hb_font_t *font; 209b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod hb_face_t *face; 210b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod hb_buffer_t *buffer; 211b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod const hb_feature_t *user_features; 212b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod unsigned int num_user_features; 213b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod 214b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod /* Transient stuff */ 215b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod hb_direction_t target_direction; 216b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod}; 217b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbod 2182014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 2192014b8d110231b13e524008282ece7451f1ae9e7Behdad Esfahbod 220ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Main shaper */ 221ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 2225c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 223ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Prepare */ 224ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 225b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbodstatic void 226b9f199c8e38cc5ed0d73845568630f3bcbdd4374Behdad Esfahbodhb_set_unicode_props (hb_buffer_t *buffer) 2273a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod{ 228aa7264123a088936f2043b45d4d41ca7413fabe5Behdad Esfahbod unsigned int count = buffer->len; 2290e3361464b00b76aa7375515163e0710a691db0cBehdad Esfahbod for (unsigned int i = 0; i < count; i++) 230d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod _hb_glyph_info_set_unicode_props (&buffer->info[i], buffer->unicode); 2313a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod} 2323a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbod 2333a852ae7fe6edfaadd75625d27515a3689503395Behdad Esfahbodstatic void 2346912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbodhb_insert_dotted_circle (hb_buffer_t *buffer, hb_font_t *font) 2356912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod{ 2360c7df2222862122ebbdc8665a21d6771ef5e0252Behdad Esfahbod if (!(buffer->flags & HB_BUFFER_FLAG_BOT) || 237f2eb3fa9dca8d21fae20c9b9dddad3245df74a05Behdad Esfahbod _hb_glyph_info_get_general_category (&buffer->info[0]) != 2386912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) 2396912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod return; 2406912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod 2418de20b1e8a1c4d2081f64e695045e6e4da7ce144Behdad Esfahbod if (!font->has_glyph (0x25CC)) 2426912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod return; 2436912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod 2446912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod hb_glyph_info_t dottedcircle; 2456912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod dottedcircle.codepoint = 0x25CC; 2466912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod _hb_glyph_info_set_unicode_props (&dottedcircle, buffer->unicode); 2476912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod 2486912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod buffer->clear_output (); 2496912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod 2506912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod buffer->idx = 0; 2516912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod hb_glyph_info_t info = dottedcircle; 2526912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod info.cluster = buffer->cur().cluster; 2536912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod info.mask = buffer->cur().mask; 2546912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod buffer->output_info (info); 2556912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod while (buffer->idx < buffer->len) 2566912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod buffer->next_glyph (); 2576912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod 2586912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod buffer->swap_buffers (); 2596912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod} 2606912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod 2616912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbodstatic void 262aa7264123a088936f2043b45d4d41ca7413fabe5Behdad Esfahbodhb_form_clusters (hb_buffer_t *buffer) 263ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 264aa7264123a088936f2043b45d4d41ca7413fabe5Behdad Esfahbod unsigned int count = buffer->len; 265ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 1; i < count; i++) 266028a1706f898bfcee0d14acfba47ebe1de09f0c4Behdad Esfahbod if (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (_hb_glyph_info_get_general_category (&buffer->info[i]))) 267330a2af3ff0e12c01b3b451357b8bdc83b2e9b47Behdad Esfahbod buffer->merge_clusters (i - 1, i + 1); 268ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 269ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 270967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodstatic void 271aa7264123a088936f2043b45d4d41ca7413fabe5Behdad Esfahbodhb_ensure_native_direction (hb_buffer_t *buffer) 272ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 273aa7264123a088936f2043b45d4d41ca7413fabe5Behdad Esfahbod hb_direction_t direction = buffer->props.direction; 274ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 2757403e055cd1463f38215ad9faedd61c3e1b66ac5Behdad Esfahbod /* TODO vertical: 2767403e055cd1463f38215ad9faedd61c3e1b66ac5Behdad Esfahbod * The only BTT vertical script is Ogham, but it's not clear to me whether OpenType 2777403e055cd1463f38215ad9faedd61c3e1b66ac5Behdad Esfahbod * Ogham fonts are supposed to be implemented BTT or not. Need to research that 2787403e055cd1463f38215ad9faedd61c3e1b66ac5Behdad Esfahbod * first. */ 279aa7264123a088936f2043b45d4d41ca7413fabe5Behdad Esfahbod if ((HB_DIRECTION_IS_HORIZONTAL (direction) && direction != hb_script_get_horizontal_direction (buffer->props.script)) || 2807403e055cd1463f38215ad9faedd61c3e1b66ac5Behdad Esfahbod (HB_DIRECTION_IS_VERTICAL (direction) && direction != HB_DIRECTION_TTB)) 281ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod { 282aa7264123a088936f2043b45d4d41ca7413fabe5Behdad Esfahbod hb_buffer_reverse_clusters (buffer); 283aa7264123a088936f2043b45d4d41ca7413fabe5Behdad Esfahbod buffer->props.direction = HB_DIRECTION_REVERSE (buffer->props.direction); 284ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 285ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 286ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 287ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 288ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Substitute */ 289ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 2905c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodstatic inline void 2915c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodhb_ot_mirror_chars (hb_ot_shape_context_t *c) 292ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 293bbbbe80ec9bc45c5b685bc09c8f993e98496555cBehdad Esfahbod if (HB_DIRECTION_IS_FORWARD (c->target_direction)) 294ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod return; 295ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 296ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_buffer_t *buffer = c->buffer; 297ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_unicode_funcs_t *unicode = buffer->unicode; 2985497a8a274a7066c0230c850baadef681785c8bbBehdad Esfahbod hb_mask_t rtlm_mask = c->plan->rtlm_mask; 2994e4ef24e46f273ad2bdda2f718223e05b37dd50fBehdad Esfahbod 300ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod unsigned int count = buffer->len; 301ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_glyph_info_t *info = buffer->info; 302ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod for (unsigned int i = 0; i < count; i++) { 303ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_codepoint_t codepoint = unicode->mirroring (info[i].codepoint); 304ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod if (likely (codepoint == info[i].codepoint)) 305ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod info[i].mask |= rtlm_mask; 3061094a294f6a44c47fc75867983f2b135a6442babBehdad Esfahbod else 307ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod info[i].codepoint = codepoint; 308ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 309ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 310ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 3115c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodstatic inline void 3123aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbodhb_ot_shape_setup_masks_fraction (hb_ot_shape_context_t *c) 3133aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod{ 3145497a8a274a7066c0230c850baadef681785c8bbBehdad Esfahbod if (!c->plan->has_frac) 3155497a8a274a7066c0230c850baadef681785c8bbBehdad Esfahbod return; 3165497a8a274a7066c0230c850baadef681785c8bbBehdad Esfahbod 3173aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod hb_buffer_t *buffer = c->buffer; 3183aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod 3193aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod /* TODO look in pre/post context text also. */ 3203aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod unsigned int count = buffer->len; 3213aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod hb_glyph_info_t *info = buffer->info; 3223aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod for (unsigned int i = 0; i < count; i++) 3233aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod { 3243aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod if (info[i].codepoint == 0x2044) /* FRACTION SLASH */ 3253aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod { 3263aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod unsigned int start = i, end = i + 1; 3273aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod while (start && 3283aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod _hb_glyph_info_get_general_category (&info[start - 1]) == 3293aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER) 3303aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod start--; 3313aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod while (end < count && 3323aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod _hb_glyph_info_get_general_category (&info[end]) == 3333aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER) 3343aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod end++; 3353aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod 336a7e8bbb080aef318b16750ca1771d0d3af3d0ae9Behdad Esfahbod for (unsigned int j = start; j < i; j++) 3375497a8a274a7066c0230c850baadef681785c8bbBehdad Esfahbod info[j].mask |= c->plan->numr_mask | c->plan->frac_mask; 3385497a8a274a7066c0230c850baadef681785c8bbBehdad Esfahbod info[i].mask |= c->plan->frac_mask; 339a7e8bbb080aef318b16750ca1771d0d3af3d0ae9Behdad Esfahbod for (unsigned int j = i + 1; j < end; j++) 3405497a8a274a7066c0230c850baadef681785c8bbBehdad Esfahbod info[j].mask |= c->plan->frac_mask | c->plan->dnom_mask; 3413aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod 3423aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod i = end - 1; 3433aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod } 3443aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod } 3453aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod} 3463aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod 3473aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbodstatic inline void 348739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbodhb_ot_shape_initialize_masks (hb_ot_shape_context_t *c) 3495c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod{ 3505c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_ot_map_t *map = &c->plan->map; 351ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_buffer_t *buffer = c->buffer; 3525c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 3535c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_mask_t global_mask = map->get_global_mask (); 354ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod buffer->reset_masks (global_mask); 355739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbod} 356739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbod 357739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbodstatic inline void 358739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbodhb_ot_shape_setup_masks (hb_ot_shape_context_t *c) 359739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbod{ 360739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbod hb_ot_map_t *map = &c->plan->map; 361739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbod hb_buffer_t *buffer = c->buffer; 3625c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 3633aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod hb_ot_shape_setup_masks_fraction (c); 3643aeee519f0b82df5263974945ae852badc4dbdedBehdad Esfahbod 3655c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod if (c->plan->shaper->setup_masks) 366ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod c->plan->shaper->setup_masks (c->plan, buffer, c->font); 3675c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 3685c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod for (unsigned int i = 0; i < c->num_user_features; i++) 3695c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod { 3705c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod const hb_feature_t *feature = &c->user_features[i]; 3715c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod if (!(feature->start == 0 && feature->end == (unsigned int)-1)) { 3725c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod unsigned int shift; 3735c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_mask_t mask = map->get_mask (feature->tag, &shift); 374ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod buffer->set_masks (feature->value << shift, mask, feature->start, feature->end); 3755c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod } 3765c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod } 3775c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod} 3785c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 3795c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodstatic inline void 380b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbodhb_ot_map_glyphs_fast (hb_buffer_t *buffer) 381ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 382b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod /* Normalization process sets up glyph_index(), we just copy it. */ 383b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod unsigned int count = buffer->len; 384b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod for (unsigned int i = 0; i < count; i++) 385b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod buffer->info[i].codepoint = buffer->info[i].glyph_index(); 386ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 387ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 3885c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodstatic inline void 3890ccf9b64736559a230425fd131c9eb8aa3048221Behdad Esfahbodhb_synthesize_glyph_classes (hb_ot_shape_context_t *c) 3900ccf9b64736559a230425fd131c9eb8aa3048221Behdad Esfahbod{ 3910ccf9b64736559a230425fd131c9eb8aa3048221Behdad Esfahbod unsigned int count = c->buffer->len; 392ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_glyph_info_t *info = c->buffer->info; 3930ccf9b64736559a230425fd131c9eb8aa3048221Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 394ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod _hb_glyph_info_set_glyph_props (&info[i], 395ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod _hb_glyph_info_get_general_category (&info[i]) 39691689de2603e4151e2a2d3a3852c61667f0c6264Behdad Esfahbod == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK ? 39791689de2603e4151e2a2d3a3852c61667f0c6264Behdad Esfahbod HB_OT_LAYOUT_GLYPH_PROPS_MARK : 39891689de2603e4151e2a2d3a3852c61667f0c6264Behdad Esfahbod HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH); 3990ccf9b64736559a230425fd131c9eb8aa3048221Behdad Esfahbod} 4000ccf9b64736559a230425fd131c9eb8aa3048221Behdad Esfahbod 4010ccf9b64736559a230425fd131c9eb8aa3048221Behdad Esfahbodstatic inline void 4025c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodhb_ot_substitute_default (hb_ot_shape_context_t *c) 403ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 404ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_buffer_t *buffer = c->buffer; 405ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod 406fabd3113a98c5f4114f48920fa7ea38bd65a8d32Behdad Esfahbod if (c->plan->shaper->preprocess_text) 407ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod c->plan->shaper->preprocess_text (c->plan, buffer, c->font); 4089f9f04c2229227bb0712166e824157bbbf5cef80Behdad Esfahbod 409739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbod hb_ot_shape_initialize_masks (c); 410739325178aba00ea5526c6a54ce588a79e5d45e2Behdad Esfahbod 4115c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_ot_mirror_chars (c); 4125c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 413ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod HB_BUFFER_ALLOCATE_VAR (buffer, glyph_index); 414b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod 415ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod _hb_ot_shape_normalize (c->plan, buffer, c->font); 4165c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 4175c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_ot_shape_setup_masks (c); 418b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod 4193992b5ec4cb43d114d87ff7ee2b992bcf819c9cdBehdad Esfahbod /* This is unfortunate to go here, but necessary... */ 4203992b5ec4cb43d114d87ff7ee2b992bcf819c9cdBehdad Esfahbod if (!hb_ot_layout_has_positioning (c->face)) 421ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod _hb_ot_shape_fallback_position_recategorize_marks (c->plan, c->font, buffer); 4223992b5ec4cb43d114d87ff7ee2b992bcf819c9cdBehdad Esfahbod 423ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_ot_map_glyphs_fast (buffer); 424b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod 425ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_index); 426ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 427ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 4285c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodstatic inline void 429c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbodhb_ot_substitute_complex (hb_ot_shape_context_t *c) 430c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod{ 431ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_buffer_t *buffer = c->buffer; 432ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod 433ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_ot_layout_substitute_start (c->font, buffer); 43405bd1b63426e07d1df7a1b40bf845dc94ab995a8Behdad Esfahbod 4355fecd8b0355894ceda14b3d3c654f20c3d5e77f4Behdad Esfahbod if (!hb_ot_layout_has_glyph_classes (c->face)) 4365fecd8b0355894ceda14b3d3c654f20c3d5e77f4Behdad Esfahbod hb_synthesize_glyph_classes (c); 4375fecd8b0355894ceda14b3d3c654f20c3d5e77f4Behdad Esfahbod 438ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod c->plan->substitute (c->font, buffer); 439c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod 440ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_ot_layout_substitute_finish (c->font, buffer); 441c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod 442c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod return; 443c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod} 444c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod 4455c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodstatic inline void 4465c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodhb_ot_substitute (hb_ot_shape_context_t *c) 4475c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod{ 4485c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_ot_substitute_default (c); 4495c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_ot_substitute_complex (c); 4505c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod} 451ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 452ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod/* Position */ 453ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 4545c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodstatic inline void 455798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kewadjust_mark_offsets (hb_glyph_position_t *pos) 456798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew{ 457798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew pos->x_offset -= pos->x_advance; 458798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew pos->y_offset -= pos->y_advance; 459798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew} 460798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew 461798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kewstatic inline void 462798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kewzero_mark_width (hb_glyph_position_t *pos) 463798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew{ 464798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew pos->x_advance = 0; 465798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew pos->y_advance = 0; 466798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew} 467798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew 468798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kewstatic inline void 469798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kewzero_mark_widths_by_unicode (hb_buffer_t *buffer, bool adjust_offsets) 470d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod{ 471d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod unsigned int count = buffer->len; 472d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 473d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod if (_hb_glyph_info_get_general_category (&buffer->info[i]) == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) 474d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod { 475798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew if (adjust_offsets) 476798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew adjust_mark_offsets (&buffer->pos[i]); 477798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew zero_mark_width (&buffer->pos[i]); 478d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod } 479d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod} 480d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod 481d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbodstatic inline void 482798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kewzero_mark_widths_by_gdef (hb_buffer_t *buffer, bool adjust_offsets) 483d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod{ 484d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod unsigned int count = buffer->len; 485d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 486101303dbf7cf15d044bf2518f14b3aec65970feaBehdad Esfahbod if (_hb_glyph_info_is_mark (&buffer->info[i])) 487d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod { 488798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew if (adjust_offsets) 489798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew adjust_mark_offsets (&buffer->pos[i]); 490798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew zero_mark_width (&buffer->pos[i]); 491d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod } 492d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod} 493d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbod 494d785fa0c45f7f25f5e5f352b933a5f6fa29be5c0Behdad Esfahbodstatic inline void 4955c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodhb_ot_position_default (hb_ot_shape_context_t *c) 496ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 497ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_direction_t direction = c->buffer->props.direction; 498967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod unsigned int count = c->buffer->len; 499ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_glyph_info_t *info = c->buffer->info; 500ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_glyph_position_t *pos = c->buffer->pos; 501568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 502568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod { 503ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod c->font->get_glyph_advance_for_direction (info[i].codepoint, 504ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod direction, 505ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod &pos[i].x_advance, 506ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod &pos[i].y_advance); 507ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod c->font->subtract_glyph_origin_for_direction (info[i].codepoint, 508ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod direction, 509ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod &pos[i].x_offset, 510ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod &pos[i].y_offset); 511568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod 512568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod } 5134b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbod} 5144b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbod 5154b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbodstatic inline bool 5164b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbodhb_ot_position_complex (hb_ot_shape_context_t *c) 5174b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbod{ 5184b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbod bool ret = false; 5194b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbod unsigned int count = c->buffer->len; 520798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew bool has_positioning = hb_ot_layout_has_positioning (c->face); 521798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew /* If the font has no GPOS, AND, no fallback positioning will 522798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew * happen, AND, direction is forward, then when zeroing mark 523798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew * widths, we shift the mark with it, such that the mark 524798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew * is positioned hanging over the previous glyph. When 525798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew * direction is backward we don't shift and it will end up 526798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew * hanging over the next glyph after the final reordering. 527798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew * If fallback positinoing happens or GPOS is present, we don't 528798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew * care. 529798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew */ 530798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew bool adjust_offsets_when_zeroing = !(has_positioning || c->plan->shaper->fallback_position || 531798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew HB_DIRECTION_IS_BACKWARD (c->buffer->props.direction)); 532568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod 53371b4c999a511bf018acaf48a45e070470c0daf12Behdad Esfahbod switch (c->plan->shaper->zero_width_marks) 534568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod { 535127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod case HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY: 536798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew zero_mark_widths_by_gdef (c->buffer, adjust_offsets_when_zeroing); 537568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod break; 538568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod 539127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod /* Not currently used for any shaper: 540127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod case HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE_EARLY: 541798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew zero_mark_widths_by_unicode (c->buffer, adjust_offsets_when_zeroing); 542127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod break; 543127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod */ 544127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod 545568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod default: 546568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod case HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE: 547127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod case HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE_LATE: 548127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod case HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE: 549568000274c8edb5f41bc4f876ce21fcc8bdaeed8Behdad Esfahbod break; 550ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod } 551c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod 552798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew if (has_positioning) 553b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod { 554ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_glyph_info_t *info = c->buffer->info; 555ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod hb_glyph_position_t *pos = c->buffer->pos; 556ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod 557b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod /* Change glyph origin to what GPOS expects, apply GPOS, change it back. */ 558b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod 559b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod for (unsigned int i = 0; i < count; i++) { 560ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod c->font->add_glyph_origin_for_direction (info[i].codepoint, 5618fbfda920e0b3bb4ab7afb732826026964b79be9Behdad Esfahbod HB_DIRECTION_LTR, 562ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod &pos[i].x_offset, 563ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod &pos[i].y_offset); 564b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod } 565c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod 5668bb5deba9630d35878eb6edb4643ecfabf99f15fBehdad Esfahbod c->plan->position (c->font, c->buffer); 567c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod 568b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod for (unsigned int i = 0; i < count; i++) { 569ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod c->font->subtract_glyph_origin_for_direction (info[i].codepoint, 5708fbfda920e0b3bb4ab7afb732826026964b79be9Behdad Esfahbod HB_DIRECTION_LTR, 571ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod &pos[i].x_offset, 572ac8cd511911c7dca6222d14fa758bff75d601567Behdad Esfahbod &pos[i].y_offset); 573b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod } 5742118fdb9f584e6735e904638e48bae48314372faBehdad Esfahbod 5755c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod ret = true; 576affaf8a0e5aa38e5820455f789eebf916e02eb7bBehdad Esfahbod } 5772bc3b9a616cedbc56ff4a915f9e3439ff3a6bf13Behdad Esfahbod 57871b4c999a511bf018acaf48a45e070470c0daf12Behdad Esfahbod switch (c->plan->shaper->zero_width_marks) 5790291a6528685f1f593707655943fb2360579cb9eBehdad Esfahbod { 580127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod case HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE_LATE: 581798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew zero_mark_widths_by_unicode (c->buffer, adjust_offsets_when_zeroing); 5820291a6528685f1f593707655943fb2360579cb9eBehdad Esfahbod break; 5830291a6528685f1f593707655943fb2360579cb9eBehdad Esfahbod 584127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod case HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE: 585798e4185bc71b1a63528e6b0af236d4c964ec607Jonathan Kew zero_mark_widths_by_gdef (c->buffer, adjust_offsets_when_zeroing); 586127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod break; 587127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod 5880291a6528685f1f593707655943fb2360579cb9eBehdad Esfahbod default: 5890291a6528685f1f593707655943fb2360579cb9eBehdad Esfahbod case HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE: 590127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod //case HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE_EARLY: 591127daf15e0b2f509ebd29a104236c8b38884efb0Behdad Esfahbod case HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY: 5920291a6528685f1f593707655943fb2360579cb9eBehdad Esfahbod break; 5930291a6528685f1f593707655943fb2360579cb9eBehdad Esfahbod } 5940291a6528685f1f593707655943fb2360579cb9eBehdad Esfahbod 5955c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod return ret; 596c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod} 597c86f932015bdf5803572b0904d343d3bc033e009Behdad Esfahbod 5985c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodstatic inline void 5995c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbodhb_ot_position (hb_ot_shape_context_t *c) 6005c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod{ 6014b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbod hb_ot_layout_position_start (c->font, c->buffer); 6024b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbod 6035c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_ot_position_default (c); 6045c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 6055c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_bool_t fallback = !hb_ot_position_complex (c); 6065c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 6074b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbod hb_ot_layout_position_finish (c->font, c->buffer); 6084b011094d5e90cf93df2891e47aeab1bffad5bbfBehdad Esfahbod 609865745b5b87236651f5663cae3461db9cb505eedBehdad Esfahbod if (fallback && c->plan->shaper->fallback_position) 610865745b5b87236651f5663cae3461db9cb505eedBehdad Esfahbod _hb_ot_shape_fallback_position (c->plan, c->font, c->buffer); 6115c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 6125c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod if (HB_DIRECTION_IS_BACKWARD (c->buffer->props.direction)) 6135c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_buffer_reverse (c->buffer); 6145c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 615865745b5b87236651f5663cae3461db9cb505eedBehdad Esfahbod /* Visual fallback goes here. */ 616865745b5b87236651f5663cae3461db9cb505eedBehdad Esfahbod 6175c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod if (fallback) 618ba87b8fc89bf745068ccd19264a2631ea0904846Behdad Esfahbod _hb_ot_shape_fallback_kern (c->plan, c->font, c->buffer); 619ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 620ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 6215c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 6225c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod/* Post-process */ 6235c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod 624d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbodstatic void 6250c7df2222862122ebbdc8665a21d6771ef5e0252Behdad Esfahbodhb_ot_hide_default_ignorables (hb_ot_shape_context_t *c) 626d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod{ 6270c7df2222862122ebbdc8665a21d6771ef5e0252Behdad Esfahbod if (c->buffer->flags & HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES) 6280c7df2222862122ebbdc8665a21d6771ef5e0252Behdad Esfahbod return; 6290c7df2222862122ebbdc8665a21d6771ef5e0252Behdad Esfahbod 6303d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod hb_codepoint_t space; 6313d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod enum { 6323d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod SPACE_DONT_KNOW, 6333d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod SPACE_AVAILABLE, 6343d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod SPACE_UNAVAILABLE 6353d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod } space_status = SPACE_DONT_KNOW; 636d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod 637d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod unsigned int count = c->buffer->len; 6383d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod hb_glyph_info_t *info = c->buffer->info; 6393d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod hb_glyph_position_t *pos = c->buffer->pos; 6403d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod unsigned int j = 0; 641d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod for (unsigned int i = 0; i < count; i++) 6423d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod { 643a1f7b2856184959e965c9c2b80363f9f46d486a7Behdad Esfahbod if (unlikely (!_hb_glyph_info_ligated (&info[i]) && 6443d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod _hb_glyph_info_is_default_ignorable (&info[i]))) 645784f29d061a2939562eca0c4943feb01174aee00Behdad Esfahbod { 6463d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod if (space_status == SPACE_DONT_KNOW) 6473d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod space_status = c->font->get_glyph (' ', 0, &space) ? SPACE_AVAILABLE : SPACE_UNAVAILABLE; 6483d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod 6493d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod if (space_status == SPACE_AVAILABLE) 6503d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod { 6513d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod info[i].codepoint = space; 6523d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod pos[i].x_advance = 0; 6533d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod pos[i].y_advance = 0; 654784f29d061a2939562eca0c4943feb01174aee00Behdad Esfahbod } 6553d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod else 6563d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod continue; /* Delete it. */ 6573d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod } 6583d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod if (j != i) 6593d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod { 6603d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod info[j] = info[i]; 6613d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod pos[j] = pos[i]; 662d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod } 6633d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod j++; 6643d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod } 6653d2c4f0c2ff8fab4262988aad65b170e5b479b20Behdad Esfahbod c->buffer->len = j; 666d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod} 667d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod 668ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 6695c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod/* Pull it all together! */ 670ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 671967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbodstatic void 672e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbodhb_ot_shape_internal (hb_ot_shape_context_t *c) 673ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod{ 674b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod c->buffer->deallocate_var_all (); 675b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod 676d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod /* Save the original direction, we use it later. */ 677bbbbe80ec9bc45c5b685bc09c8f993e98496555cBehdad Esfahbod c->target_direction = c->buffer->props.direction; 678d2ba016ca1ba7489537768b619980d5159b5870cBehdad Esfahbod 679101303dbf7cf15d044bf2518f14b3aec65970feaBehdad Esfahbod _hb_buffer_allocate_unicode_vars (c->buffer); 680b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod 681330a2af3ff0e12c01b3b451357b8bdc83b2e9b47Behdad Esfahbod c->buffer->clear_output (); 682330a2af3ff0e12c01b3b451357b8bdc83b2e9b47Behdad Esfahbod 683d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod hb_set_unicode_props (c->buffer); 6846912e476dd92639c3ddf07ca51c8d4a262c8b3a5Behdad Esfahbod hb_insert_dotted_circle (c->buffer, c->font); 6854ff0d2d9dfc4f7e4880a4e964ca9872624508ea0Behdad Esfahbod hb_form_clusters (c->buffer); 6864ff0d2d9dfc4f7e4880a4e964ca9872624508ea0Behdad Esfahbod 687aa7264123a088936f2043b45d4d41ca7413fabe5Behdad Esfahbod hb_ensure_native_direction (c->buffer); 68854d1a0d2b2c4ffe15494967122c6422ecb1fc80bBehdad Esfahbod 6895c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_ot_substitute (c); 6905c60b70c89b4e0a6512d9fd1ab5394dd76feb742Behdad Esfahbod hb_ot_position (c); 691ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod 6920c7df2222862122ebbdc8665a21d6771ef5e0252Behdad Esfahbod hb_ot_hide_default_ignorables (c); 693d1deaa2f5bd028e8076265cba92cffa4fa2834acBehdad Esfahbod 694101303dbf7cf15d044bf2518f14b3aec65970feaBehdad Esfahbod _hb_buffer_deallocate_unicode_vars (c->buffer); 695b65c06025d2b54a44f716e030d4b10072c65bea8Behdad Esfahbod 696bbbbe80ec9bc45c5b685bc09c8f993e98496555cBehdad Esfahbod c->buffer->props.direction = c->target_direction; 6979f9bcceca6321d5a5812f878de1de39901349a78Behdad Esfahbod 6989f9bcceca6321d5a5812f878de1de39901349a78Behdad Esfahbod c->buffer->deallocate_var_all (); 699967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod} 700967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod 701fd3d32d31cb6d74a9994b6850d539fd0b707d941Behdad Esfahbod 70202aeca985b570763342c35e99af90025bfa088d5Behdad Esfahbodhb_bool_t 703bd26b4d21f59312805d294f46f15182adbcc47daBehdad Esfahbod_hb_ot_shape (hb_shape_plan_t *shape_plan, 704bd26b4d21f59312805d294f46f15182adbcc47daBehdad Esfahbod hb_font_t *font, 7056bd9b479b8b2befbb0847282e93beade197c8038Behdad Esfahbod hb_buffer_t *buffer, 7066bd9b479b8b2befbb0847282e93beade197c8038Behdad Esfahbod const hb_feature_t *features, 7076bd9b479b8b2befbb0847282e93beade197c8038Behdad Esfahbod unsigned int num_features) 708967240dd8b96802345ef273e75427066e91ea8fbBehdad Esfahbod{ 709e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod hb_ot_shape_context_t c = {HB_SHAPER_DATA_GET (shape_plan), font, font->face, buffer, features, num_features}; 710e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod hb_ot_shape_internal (&c); 71102aeca985b570763342c35e99af90025bfa088d5Behdad Esfahbod 7120594a2448440208efa0acac9a5d8d52d43108289Behdad Esfahbod return true; 713ca663bb23c16f6a1f04efa6e10dad0e3e7c260a3Behdad Esfahbod} 7141827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod 7151827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod 716f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbodvoid 717f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbodhb_ot_shape_plan_collect_lookups (hb_shape_plan_t *shape_plan, 718f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_tag_t table_tag, 719f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_set_t *lookup_indexes /* OUT */) 720f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod{ 72151bb498b7b07bff4a447405b72f09b68d07a3e95Behdad Esfahbod /* XXX Does the first part always succeed? */ 722f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod HB_SHAPER_DATA_GET (shape_plan)->collect_lookups (table_tag, lookup_indexes); 723f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod} 724b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod 725f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod 726f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod/* TODO Move this to hb-ot-shape-normalize, make it do decompose, and make it public. */ 727f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbodstatic void 728f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbodadd_char (hb_font_t *font, 729f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_unicode_funcs_t *unicode, 730f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_bool_t mirror, 731f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_codepoint_t u, 732f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_set_t *glyphs) 733b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod{ 734f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_codepoint_t glyph; 735f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod if (font->get_glyph (u, 0, &glyph)) 736f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod glyphs->add (glyph); 737f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod if (mirror) 738f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod { 739f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_codepoint_t m = unicode->mirroring (u); 740f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod if (m != u && font->get_glyph (m, 0, &glyph)) 741f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod glyphs->add (glyph); 742f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod } 743b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod} 744b00321ea78793d9b3592b5173a9800e6322424feBehdad Esfahbod 745f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod 7461827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbodvoid 7471827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbodhb_ot_shape_glyphs_closure (hb_font_t *font, 7481827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod hb_buffer_t *buffer, 7491827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod const hb_feature_t *features, 7501827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod unsigned int num_features, 7511827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod hb_set_t *glyphs) 7521827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod{ 7531827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod hb_ot_shape_plan_t plan; 7541827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod 755f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod const char *shapers[] = {"ot", NULL}; 756f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_shape_plan_t *shape_plan = hb_shape_plan_create_cached (font->face, &buffer->props, 757f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod features, num_features, shapers); 7581827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod 759f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod bool mirror = hb_script_get_horizontal_direction (buffer->props.script) == HB_DIRECTION_RTL; 7601827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod 7611827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod unsigned int count = buffer->len; 7621827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 763f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod add_char (font, buffer->unicode, mirror, buffer->info[i].codepoint, glyphs); 764f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod 765f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_set_t lookups; 766f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod lookups.init (); 767f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_ot_shape_plan_collect_lookups (shape_plan, HB_OT_TAG_GSUB, &lookups); 7681827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod 7691827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod /* And find transitive closure. */ 7701827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod hb_set_t copy; 7711827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod copy.init (); 7721827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod do { 7731827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod copy.set (glyphs); 774f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod for (hb_codepoint_t lookup_index = -1; hb_set_next (&lookups, &lookup_index);) 775f30641038ba96e83950729b1bd9d86d2e98e46c5Behdad Esfahbod hb_ot_layout_lookup_substitute_closure (font->face, lookup_index, glyphs); 776aec89de5641fbe1c3031d63dd5f40ec99bf2a538Behdad Esfahbod } while (!copy.is_equal (glyphs)); 777e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod 778e82061e8db922f0ddbefd5a184ee2f9f967b9a05Behdad Esfahbod hb_shape_plan_destroy (shape_plan); 7791827dc208c867e433a95237d1ed3fc7a73d1d9a7Behdad Esfahbod} 780