hb-ot-shape-complex-indic.cc revision 3285e107c9a83aeb552e67f9460680ff6d167d88
1b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod/* 227aba594c90b4444c35273a38f5fedc8e09d9a88Behdad Esfahbod * Copyright © 2011,2012 Google, Inc. 3b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * 4b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * This is part of HarfBuzz, a text shaping library. 5b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * 6b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * Permission is hereby granted, without written agreement and without 7b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * license or royalty fees, to use, copy, modify, and distribute this 8b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * software and its documentation for any purpose, provided that the 9b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * above copyright notice and the following two paragraphs appear in 10b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * all copies of this software. 11b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * 12b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * DAMAGE. 17b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * 18b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * 24b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod * Google Author(s): Behdad Esfahbod 25b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod */ 26b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 273ed4634ec349fa9e943ad23718c04be4dd4bba62Behdad Esfahbod#include "hb-ot-shape-complex-indic-private.hh" 28a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod#include "hb-ot-shape-private.hh" 29352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod 30a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod#define OLD_INDIC_TAG(script) (((hb_tag_t) script) | 0x20000000) 31a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod#define IS_OLD_INDIC_TAG(tag) ( \ 32a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_BENGALI) || \ 33a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_DEVANAGARI) || \ 34a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_GUJARATI) || \ 35a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_GURMUKHI) || \ 36a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_KANNADA) || \ 37a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_MALAYALAM) || \ 38a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_ORIYA) || \ 39a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_TAMIL) || \ 40a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_TELUGU) \ 41a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod ) 42a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodstruct indic_options_t 43ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod{ 44a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod int initialized : 1; 45a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod int uniscribe_bug_compatible : 1; 46a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod}; 47a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 48a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodunion indic_options_union_t { 49a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod int i; 50a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod indic_options_t opts; 51a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod}; 52a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad EsfahbodASSERT_STATIC (sizeof (int) == sizeof (indic_options_union_t)); 53a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 54a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodstatic indic_options_union_t 55a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodindic_options_init (void) 56a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod{ 57a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod indic_options_union_t u; 58a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod u.i = 0; 59a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod u.opts.initialized = 1; 60a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 61a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod char *c = getenv ("HB_OT_INDIC_OPTIONS"); 62a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod u.opts.uniscribe_bug_compatible = c && strstr (c, "uniscribe-bug-compatible"); 63a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 64a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod return u; 65a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod} 66a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 67a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodinline indic_options_t 68a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodindic_options (void) 69a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod{ 70a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod static indic_options_union_t options; 71a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 72a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod if (unlikely (!options.i)) { 73a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod /* This is idempotent and threadsafe. */ 74a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod options = indic_options_init (); 75ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod } 76ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod 77a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod return options.opts; 78a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod} 79a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 80ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod 81743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic int 82743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodcompare_codepoint (const void *pa, const void *pb) 83743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 84743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_codepoint_t a = * (hb_codepoint_t *) pa; 85743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_codepoint_t b = * (hb_codepoint_t *) pb; 86743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 87743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod return a < b ? -1 : a == b ? 0 : +1; 88743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 89743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 90743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic indic_position_t 91743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodconsonant_position (hb_codepoint_t u) 92743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 93743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod consonant_position_t *record; 94743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 950de771b72da6b342b015e3556190821547a4011dBehdad Esfahbod /* Khmer does not have pre-base half forms. */ 960de771b72da6b342b015e3556190821547a4011dBehdad Esfahbod if (0x1780 <= u && u <= 0x17FF) 970de771b72da6b342b015e3556190821547a4011dBehdad Esfahbod return POS_BELOW_C; 980de771b72da6b342b015e3556190821547a4011dBehdad Esfahbod 99743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod record = (consonant_position_t *) bsearch (&u, consonant_positions, 100743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod ARRAY_LENGTH (consonant_positions), 101743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod sizeof (consonant_positions[0]), 102743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod compare_codepoint); 103743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 104dbccf87eef0d26838fa4bb3ae26410f6c4818836Behdad Esfahbod return record ? record->position : POS_BASE_C; 105743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 106743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 107352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbodstatic bool 108352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbodis_ra (hb_codepoint_t u) 109352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod{ 110352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod return !!bsearch (&u, ra_chars, 111352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod ARRAY_LENGTH (ra_chars), 112352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod sizeof (ra_chars[0]), 113352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod compare_codepoint); 114352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod} 115352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod 1169ee27a928a989c71923cef82a9e9828f8e9ca051Behdad Esfahbodstatic bool 1179da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbodis_joiner (const hb_glyph_info_t &info) 1189ee27a928a989c71923cef82a9e9828f8e9ca051Behdad Esfahbod{ 1199da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod return !!(FLAG (info.indic_category()) & (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ))); 1209da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod} 1219da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod 1229da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbodstatic bool 1239da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbodis_consonant (const hb_glyph_info_t &info) 1249da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod{ 1251a1fa8c655a082fc1439608457ba717306cc83caBehdad Esfahbod /* Note: 1261a1fa8c655a082fc1439608457ba717306cc83caBehdad Esfahbod * 12718c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod * We treat Vowels and placeholders as if they were consonants. This is safe because Vowels 128c5306b6861cfaa50af40e8ceb058791fa06d7981Behdad Esfahbod * cannot happen in a consonant syllable. The plus side however is, we can call the 129c5306b6861cfaa50af40e8ceb058791fa06d7981Behdad Esfahbod * consonant syllable logic from the vowel syllable function and get it all right! */ 13018c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod return !!(FLAG (info.indic_category()) & (FLAG (OT_C) | FLAG (OT_Ra) | FLAG (OT_V) | FLAG (OT_NBSP) | FLAG (OT_DOTTEDCIRCLE))); 1319ee27a928a989c71923cef82a9e9828f8e9ca051Behdad Esfahbod} 132c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod 133deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbodstatic bool 134deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbodis_halant_or_coeng (const hb_glyph_info_t &info) 135deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod{ 136deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod return !!(FLAG (info.indic_category()) & (FLAG (OT_H) | FLAG (OT_Coeng))); 137deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod} 138deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod 139eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodstruct feature_list_t { 140c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod hb_tag_t tag; 141c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod hb_bool_t is_global; 142eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod}; 143eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 144d5c4edcdd6df32f2f23aca44f14838b4baab4d7aBehdad Esfahbod/* These features are applied one at a time, given the order in this table. */ 145eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodstatic const feature_list_t 146eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodindic_basic_features[] = 147b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod{ 148c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('n','u','k','t'), true}, 149c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('a','k','h','n'), false}, 150c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('r','p','h','f'), false}, 1511ac075b227090a9ad930dcc1670236c176b27067Behdad Esfahbod {HB_TAG('r','k','r','f'), true}, 152c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('p','r','e','f'), false}, 153c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('b','l','w','f'), false}, 154c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('h','a','l','f'), false}, 15529f106d7fba25e1464debd3a4831a7380d75c4c9Behdad Esfahbod {HB_TAG('a','b','v','f'), false}, 156c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('p','s','t','f'), false}, 1570201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod {HB_TAG('c','f','a','r'), false}, 1589da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod {HB_TAG('c','j','c','t'), false}, 1591d6846db9ebf84561bb30a4e48c6c43184914099Behdad Esfahbod {HB_TAG('v','a','t','u'), true}, 160c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod}; 161c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod 162c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod/* Same order as the indic_basic_features array */ 163c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbodenum { 164c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod _NUKT, 165c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod AKHN, 166c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod RPHF, 167df6d45c693c417bf311e6fa49f18a8558542e525Behdad Esfahbod _RKRF, 168c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod PREF, 169c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod BLWF, 170c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod HALF, 17129f106d7fba25e1464debd3a4831a7380d75c4c9Behdad Esfahbod ABVF, 172c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod PSTF, 1730201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod CFAR, 1741d6846db9ebf84561bb30a4e48c6c43184914099Behdad Esfahbod CJCT, 1751d6846db9ebf84561bb30a4e48c6c43184914099Behdad Esfahbod VATU 176b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod}; 177b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 178d5c4edcdd6df32f2f23aca44f14838b4baab4d7aBehdad Esfahbod/* These features are applied all at once. */ 179eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodstatic const feature_list_t 180eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodindic_other_features[] = 181b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod{ 182eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('i','n','i','t'), false}, 183eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('p','r','e','s'), true}, 184eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('a','b','v','s'), true}, 185eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('b','l','w','s'), true}, 186eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('p','s','t','s'), true}, 187eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('h','a','l','n'), true}, 188eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 189eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('d','i','s','t'), true}, 190eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('a','b','v','m'), true}, 191eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('b','l','w','m'), true}, 192eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod}; 193eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 194743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 195743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 196743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodinitial_reordering (const hb_ot_map_t *map, 197743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_face_t *face, 198743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_buffer_t *buffer, 199743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod void *user_data HB_UNUSED); 200f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbodstatic void 201f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbodfinal_reordering (const hb_ot_map_t *map, 202f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod hb_face_t *face, 203f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod hb_buffer_t *buffer, 204743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod void *user_data HB_UNUSED); 205b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 206b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbodvoid 2079f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod_hb_ot_shape_complex_collect_features_indic (hb_ot_map_builder_t *map, 2089f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod const hb_segment_properties_t *props HB_UNUSED) 209b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod{ 210f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod map->add_bool_feature (HB_TAG('l','o','c','l')); 211a54a5505a35eef5315a8e2e7a79502901e3eff5fBehdad Esfahbod /* The Indic specs do not require ccmp, but we apply it here since if 212a54a5505a35eef5315a8e2e7a79502901e3eff5fBehdad Esfahbod * there is a use of it, it's typically at the beginning. */ 213f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod map->add_bool_feature (HB_TAG('c','c','m','p')); 214f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod 215743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod map->add_gsub_pause (initial_reordering, NULL); 216f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod 217412b91889d9a1ae477e8b6907d0b9a76e78a6c91Behdad Esfahbod for (unsigned int i = 0; i < ARRAY_LENGTH (indic_basic_features); i++) { 21876f76812ac7cca8ac6935952a2360d5e151480faBehdad Esfahbod map->add_bool_feature (indic_basic_features[i].tag, indic_basic_features[i].is_global); 219412b91889d9a1ae477e8b6907d0b9a76e78a6c91Behdad Esfahbod map->add_gsub_pause (NULL, NULL); 220412b91889d9a1ae477e8b6907d0b9a76e78a6c91Behdad Esfahbod } 221b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 222f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod map->add_gsub_pause (final_reordering, NULL); 223f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod 224d5c4edcdd6df32f2f23aca44f14838b4baab4d7aBehdad Esfahbod for (unsigned int i = 0; i < ARRAY_LENGTH (indic_other_features); i++) 225eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod map->add_bool_feature (indic_other_features[i].tag, indic_other_features[i].is_global); 226b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod} 227b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 228d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbodvoid 229d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbod_hb_ot_shape_complex_override_features_indic (hb_ot_map_builder_t *map, 230d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbod const hb_segment_properties_t *props HB_UNUSED) 231d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbod{ 232af92b4cc90e4184d5bdd8037c551ed482700114fBehdad Esfahbod /* Uniscribe does not apply 'kern'. */ 233af92b4cc90e4184d5bdd8037c551ed482700114fBehdad Esfahbod if (indic_options ().uniscribe_bug_compatible) 234af92b4cc90e4184d5bdd8037c551ed482700114fBehdad Esfahbod map->add_feature (HB_TAG('k','e','r','n'), 0, true); 235d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbod} 236d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbod 237867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 23811138ccff71f442da1fcf64faa0e1d22e083e775Behdad Esfahbodhb_ot_shape_normalization_mode_t 23911138ccff71f442da1fcf64faa0e1d22e083e775Behdad Esfahbod_hb_ot_shape_complex_normalization_preference_indic (void) 24002cdf743c2ec345a44d4fcf865594b6ac13fccd0Behdad Esfahbod{ 24102cdf743c2ec345a44d4fcf865594b6ac13fccd0Behdad Esfahbod /* We want split matras decomposed by the common shaping logic. */ 24211138ccff71f442da1fcf64faa0e1d22e083e775Behdad Esfahbod return HB_OT_SHAPE_NORMALIZATION_MODE_DECOMPOSED; 24302cdf743c2ec345a44d4fcf865594b6ac13fccd0Behdad Esfahbod} 24402cdf743c2ec345a44d4fcf865594b6ac13fccd0Behdad Esfahbod 245867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 246b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbodvoid 2479f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod_hb_ot_shape_complex_setup_masks_indic (hb_ot_map_t *map HB_UNUSED, 2489f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod hb_buffer_t *buffer, 2493f18236a03880c0960f5990dc90685f6146951a6Behdad Esfahbod hb_font_t *font HB_UNUSED) 250b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod{ 2519f9bcceca6321d5a5812f878de1de39901349a78Behdad Esfahbod HB_BUFFER_ALLOCATE_VAR (buffer, indic_category); 2529f9bcceca6321d5a5812f878de1de39901349a78Behdad Esfahbod HB_BUFFER_ALLOCATE_VAR (buffer, indic_position); 2539f9bcceca6321d5a5812f878de1de39901349a78Behdad Esfahbod 254743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* We cannot setup masks here. We save information about characters 255743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * and setup masks later on in a pause-callback. */ 256743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 257743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod unsigned int count = buffer->len; 258b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 259b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod { 26092332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod hb_glyph_info_t &info = buffer->info[i]; 26192332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod unsigned int type = get_indic_categories (info.codepoint); 26292332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod 26392332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod info.indic_category() = type & 0x0F; 26492332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod info.indic_position() = type >> 4; 26592332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod 2663399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod /* The spec says U+0952 is OT_A. However, testing shows that Uniscribe 2673399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod * treats U+0951..U+0952 all as OT_VD. 2683399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod * TESTS: 2693399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod * U+092E,U+0947,U+0952 2703399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod * U+092E,U+0952,U+0947 2713399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod * U+092E,U+0947,U+0951 2723399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod * U+092E,U+0951,U+0947 2733399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod * */ 2743399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod if (unlikely (hb_in_range<hb_codepoint_t> (info.codepoint, 0x0951, 0x0954))) 2753399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod info.indic_category() = OT_VD; 2763399a06e7033651ee926448737bdb18e553c1796Behdad Esfahbod 277df50b8474094f0563ccfdae12c4425a51b72add6Behdad Esfahbod if (info.indic_category() == OT_X && 27825bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbod unlikely (hb_in_range<hb_codepoint_t> (info.codepoint, 0x17CB, 0x17D2))) /* Khmer Various signs */ 27925bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbod info.indic_category() = OT_N; 280df50b8474094f0563ccfdae12c4425a51b72add6Behdad Esfahbod 281c50ed71e9a3df1844f564de66d54b46a696c1356Behdad Esfahbod /* Khmer Virama is different since it can be used to form a final consonant. */ 282c50ed71e9a3df1844f564de66d54b46a696c1356Behdad Esfahbod if (unlikely (info.codepoint == 0x17D2)) 283c50ed71e9a3df1844f564de66d54b46a696c1356Behdad Esfahbod info.indic_category() = OT_Coeng; 284c50ed71e9a3df1844f564de66d54b46a696c1356Behdad Esfahbod 285db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod if (info.indic_category() == OT_Repha) { 286db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod /* There are two kinds of characters marked as Repha: 287db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod * - The ones that are GenCat=Mn are already positioned visually, ie. after base. (eg. Khmer) 288db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod * - The ones that are GenCat=Lo is encoded logically, ie. beginning of syllable. (eg. Malayalam) 289db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod * 290db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod * We recategorize the first kind to look like a Nukta and attached to the base directly. 291db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod */ 292db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod if (_hb_glyph_info_get_general_category (&info) == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) 293db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod info.indic_category() = OT_N; 294db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod } 295db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod 296db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod 297db8981f1e0e8625714568c6d0f11f0b317b11d0aBehdad Esfahbod /* Assign positions... */ 298c50ed71e9a3df1844f564de66d54b46a696c1356Behdad Esfahbod if (is_consonant (info)) { 29992332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod info.indic_position() = consonant_position (info.codepoint); 30092332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod if (is_ra (info.codepoint)) 30192332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod info.indic_category() = OT_Ra; 30292332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod } else if (info.indic_category() == OT_SM || 30392332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod info.indic_category() == OT_VD) { 30492332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod info.indic_position() = POS_SMVD; 30592332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod } else if (unlikely (info.codepoint == 0x200C)) 30692332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod info.indic_category() = OT_ZWNJ; 30792332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod else if (unlikely (info.codepoint == 0x200D)) 30892332e5116271a5d96e532005fe750e7552a6cbbBehdad Esfahbod info.indic_category() = OT_ZWJ; 30918c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod else if (unlikely (info.codepoint == 0x25CC)) 31018c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod info.indic_category() = OT_DOTTEDCIRCLE; 311b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod } 312743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 313b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 31445d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbodstatic int 31545d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbodcompare_indic_order (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb) 31645d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod{ 31745d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod int a = pa->indic_position(); 31845d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod int b = pb->indic_position(); 31945d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 32045d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod return a < b ? -1 : a == b ? 0 : +1; 32145d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod} 322867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 3237ea58db311bfb0d8f804d1e9f4a1f004bd45075aBehdad Esfahbod/* Rules from: 3247ea58db311bfb0d8f804d1e9f4a1f004bd45075aBehdad Esfahbod * https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx */ 3257ea58db311bfb0d8f804d1e9f4a1f004bd45075aBehdad Esfahbod 326743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 32770fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbodinitial_reordering_consonant_syllable (const hb_ot_map_t *map, hb_buffer_t *buffer, hb_mask_t *basic_mask_array, 328ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int start, unsigned int end) 329743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 330ee58f3bc75d2d071a71b94063bf12205a5871acbBehdad Esfahbod hb_glyph_info_t *info = buffer->info; 331743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 332617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod 333743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* 1. Find base consonant: 334743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 335743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * The shaping engine finds the base consonant of the syllable, using the 336743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * following algorithm: starting from the end of the syllable, move backwards 337743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * until a consonant is found that does not have a below-base or post-base 338743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * form (post-base forms have to follow below-base forms), or that is not a 339743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * pre-base reordering Ra, or arrive at the first consonant. The consonant 340743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * stopped at will be the base. 341743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 342743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o If the syllable starts with Ra + Halant (in a script that has Reph) 343743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * and has more than one consonant, Ra is excluded from candidates for 344743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * base consonants. 345743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod */ 346743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 3475e72071062c015237b79fbd0521341a63166a204Behdad Esfahbod unsigned int base = end; 34876b3409de6887c1cdd5c679939497b1b56f4554bBehdad Esfahbod bool has_reph = false; 349743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 35076b3409de6887c1cdd5c679939497b1b56f4554bBehdad Esfahbod { 351617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod /* -> If the syllable starts with Ra + Halant (in a script that has Reph) 352617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod * and has more than one consonant, Ra is excluded from candidates for 353617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod * base consonants. */ 354617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod unsigned int limit = start; 35570fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod if (basic_mask_array[RPHF] && 356617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod start + 3 <= end && 357617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod info[start].indic_category() == OT_Ra && 358617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod info[start + 1].indic_category() == OT_H && 3593285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod (unlikely (buffer->props.script == HB_SCRIPT_SINHALA) ? 3603285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod info[start + 2].indic_category() == OT_ZWJ /* In Sinhala, form Reph only if ZWJ is present */: 3613285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod !is_joiner (info[start + 2] /* In other scripts, any joiner blocks Reph formation */ ) 3623285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod )) 363617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod { 364617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod limit += 2; 3653285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod while (limit < end && is_joiner (info[limit])) 3663285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod limit++; 367617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod base = start; 368617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod has_reph = true; 369617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod }; 37076b3409de6887c1cdd5c679939497b1b56f4554bBehdad Esfahbod 37114dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod enum base_position_t { 37214dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod BASE_FIRST, 37314dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod BASE_LAST 37414dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod } base_pos; 37514dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod 37614dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod switch ((hb_tag_t) buffer->props.script) 37714dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod { 37814dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod case HB_SCRIPT_KHMER: 37914dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod base_pos = BASE_FIRST; 38014dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod break; 38114dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod 38214dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod default: 38314dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod base_pos = BASE_LAST; 38414dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod break; 38514dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod } 38614dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod 38714dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod if (base_pos == BASE_LAST) 3885d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod { 3895d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> starting from the end of the syllable, move backwards */ 3905d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod unsigned int i = end; 3915d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod do { 3925d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod i--; 3935d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> until a consonant is found */ 3945d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod if (is_consonant (info[i])) 3953c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod { 3965d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> that does not have a below-base or post-base form 3975d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod * (post-base forms have to follow below-base forms), */ 3985d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod if (info[i].indic_position() != POS_BELOW_C && 3995d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod info[i].indic_position() != POS_POST_C) 4005d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod { 4015d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod base = i; 4025d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod break; 4035d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod } 4045d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod 4055d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> or that is not a pre-base reordering Ra, 4065d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod * 40725e302da9a712e6f1d63b0d243a8df0d326ddba3Behdad Esfahbod * IMPLEMENTATION NOTES: 40825e302da9a712e6f1d63b0d243a8df0d326ddba3Behdad Esfahbod * 40925e302da9a712e6f1d63b0d243a8df0d326ddba3Behdad Esfahbod * Our pre-base reordering Ra's are marked POS_BELOW, so will be skipped 41025e302da9a712e6f1d63b0d243a8df0d326ddba3Behdad Esfahbod * by the logic above already. 4115d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod */ 4125d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod 4135d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> or arrive at the first consonant. The consonant stopped at will 4145d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod * be the base. */ 4153c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod base = i; 4163c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod } 4175d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod else 4185d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod if (is_joiner (info[i])) 4195d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod break; 4205d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod } while (i > limit); 4215d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod } 4225d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod else 4235d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod { 4245d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* In scripts without half forms (eg. Khmer), the first consonant is always the base. */ 4255d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod 4265d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod if (!has_reph) 4275d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod base = limit; 4285d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod } 429743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 4303c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod if (base < start) 4313c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod base = start; /* Just in case... */ 432743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 433617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod 434617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod /* -> If the syllable starts with Ra + Halant (in a script that has Reph) 435617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod * and has more than one consonant, Ra is excluded from candidates for 436617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod * base consonants. */ 437617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod if (has_reph && base == start) { 438617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod /* Have no other consonant, so Reph is not formed and Ra becomes base. */ 439617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod has_reph = false; 440617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod } 4415e4e21fce4b548b0b8a5951bc8f35a9f27428192Behdad Esfahbod } 4423d25079f8d6be81b9b4b91d3a97016b8a572f571Behdad Esfahbod 4433d25079f8d6be81b9b4b91d3a97016b8a572f571Behdad Esfahbod 444743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* 2. Decompose and reorder Matras: 445743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 446743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * Each matra and any syllable modifier sign in the cluster are moved to the 447743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * appropriate position relative to the consonant(s) in the cluster. The 448743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * shaping engine decomposes two- or three-part matras into their constituent 449743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * parts before any repositioning. Matra characters are classified by which 450743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * consonant in a conjunct they have affinity for and are reordered to the 451743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * following positions: 452743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 453743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o Before first half form in the syllable 454743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o After subjoined consonants 455743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o After post-form consonant 456743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o After main consonant (for above marks) 457743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 458743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * IMPLEMENTATION NOTES: 459743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 460743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * The normalize() routine has already decomposed matras for us, so we don't 461743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * need to worry about that. 462743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod */ 463743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 464743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 465743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* 3. Reorder marks to canonical order: 466743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 467743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * Adjacent nukta and halant or nukta and vedic sign are always repositioned 468743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * if necessary, so that the nukta is first. 469743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 470743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * IMPLEMENTATION NOTES: 471743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 472743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * We don't need to do this: the normalize() routine already did this for us. 473743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod */ 474743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 475743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 47645d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod /* Reorder characters */ 47745d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 4783c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = start; i < base; i++) 479e8cd81f76d159f3ecf808952dab24bc07782497aBehdad Esfahbod info[i].indic_position() = MIN ((unsigned int) POS_PRE_C, info[i].indic_position()); 48055f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod 481075d671f1093d2e3c58f7f45568696030f1b3efdBehdad Esfahbod if (base < end) 482075d671f1093d2e3c58f7f45568696030f1b3efdBehdad Esfahbod info[base].indic_position() = POS_BASE_C; 48345d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 48455f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod /* Mark final consonants. A final consonant is one appearing after a matra, 48555f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod * like in Khmer. */ 48655f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 48755f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod if (info[i].indic_category() == OT_M) { 48855f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod for (unsigned int j = i + 1; j < end; j++) 48955f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod if (is_consonant (info[j])) { 49055f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod info[j].indic_position() = POS_FINAL_C; 49155f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod break; 49255f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod } 49355f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod break; 49455f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod } 49555f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod 496fd06bf56110e73826b3d5c73ac964e2609450d46Behdad Esfahbod /* Handle beginning Ra */ 4975e4e21fce4b548b0b8a5951bc8f35a9f27428192Behdad Esfahbod if (has_reph) 498dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod info[start].indic_position() = POS_RA_TO_BECOME_REPH; 499fd06bf56110e73826b3d5c73ac964e2609450d46Behdad Esfahbod 500f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod /* For old-style Indic script tags, move the first post-base Halant after 501f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod * last consonant. */ 502a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod if (IS_OLD_INDIC_TAG (map->get_chosen_script (0))) { 5033c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 504f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod if (info[i].indic_category() == OT_H) { 505f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod unsigned int j; 506f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod for (j = end - 1; j > i; j--) 507190eb31a16178269aecaf5d2ecc9012f956749f4Behdad Esfahbod if (is_consonant (info[j])) 508f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod break; 509f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod if (j > i) { 510f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod /* Move Halant to after last consonant. */ 511f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod hb_glyph_info_t t = info[i]; 512f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod memmove (&info[i], &info[i + 1], (j - i) * sizeof (info[0])); 513f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod info[j] = t; 514f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod } 515f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod break; 516f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod } 517f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod } 518f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod 51945d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod /* Attach ZWJ, ZWNJ, nukta, and halant to previous char to move with them. */ 520a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod if (!indic_options ().uniscribe_bug_compatible) 521ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod { 522ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod /* Please update the Uniscribe branch when touching this! */ 523ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod for (unsigned int i = start + 1; i < end; i++) 52425bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbod if ((FLAG (info[i].indic_category()) & (FLAG (OT_ZWNJ) | FLAG (OT_ZWJ) | FLAG (OT_N) | FLAG (OT_RS) | FLAG (OT_H)))) 525ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod info[i].indic_position() = info[i - 1].indic_position(); 526ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod } else { 52767ea29af49bb08ee679914076808327992cf6676Behdad Esfahbod /* 52867ea29af49bb08ee679914076808327992cf6676Behdad Esfahbod * Uniscribe doesn't move the Halant with Left Matra. 52967ea29af49bb08ee679914076808327992cf6676Behdad Esfahbod * TEST: U+092B,U+093F,U+094DE 53067ea29af49bb08ee679914076808327992cf6676Behdad Esfahbod */ 531ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod /* Please update the non-Uniscribe branch when touching this! */ 532ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod for (unsigned int i = start + 1; i < end; i++) 53325bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbod if ((FLAG (info[i].indic_category()) & (FLAG (OT_ZWNJ) | FLAG (OT_ZWJ) | FLAG (OT_N) | FLAG (OT_RS) | FLAG (OT_H)))) { 534ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod info[i].indic_position() = info[i - 1].indic_position(); 5356a091df9b403b147ef78f3974610dedf4ce1e08aBehdad Esfahbod if (info[i].indic_category() == OT_H && info[i].indic_position() == POS_PRE_M) 536ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod for (unsigned int j = i; j > start; j--) 5376a091df9b403b147ef78f3974610dedf4ce1e08aBehdad Esfahbod if (info[j - 1].indic_position() != POS_PRE_M) { 538ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod info[i].indic_position() = info[j - 1].indic_position(); 539ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod break; 540ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod } 541ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod } 542ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod } 54374ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod /* Re-attach ZWJ, ZWNJ, and halant to next char, for after-base consonants. */ 54474ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod { 54574ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod unsigned int last_halant = end; 54674ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 547deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (is_halant_or_coeng (info[i])) 54874ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod last_halant = i; 54974ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod else if (is_consonant (info[i])) { 55074ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod for (unsigned int j = last_halant; j < i; j++) 55174ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod info[j].indic_position() = info[i].indic_position(); 55274ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod } 55374ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod } 55445d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 55545d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod /* We do bubble-sort, skip malicious clusters attempts */ 556b99d63ae114fb58f129562b293a8a66543d499adBehdad Esfahbod if (end - start < 64) 557a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod { 558a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod /* Sit tight, rock 'n roll! */ 559d3637edb248162970e202e9d0671540274192844Behdad Esfahbod hb_bubble_sort (info + start, end - start, compare_indic_order); 560a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod /* Find base again */ 561a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod base = end; 5623c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = start; i < end; i++) 563a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod if (info[i].indic_position() == POS_BASE_C) { 564a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod base = i; 565a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod break; 566a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod } 567a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod } 56845d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 569743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* Setup masks now */ 570743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 571281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod { 572281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod hb_mask_t mask; 573281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod 574dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod /* Reph */ 575668c6046c1b3af3bd316bda0cc8636f2a5e8df42Behdad Esfahbod for (unsigned int i = start; i < end && info[i].indic_position() == POS_RA_TO_BECOME_REPH; i++) 57670fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod info[i].mask |= basic_mask_array[RPHF]; 577dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 578281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod /* Pre-base */ 57970fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod mask = basic_mask_array[HALF] | basic_mask_array[AKHN] | basic_mask_array[CJCT]; 5803c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = start; i < base; i++) 581281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod info[i].mask |= mask; 582281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod /* Base */ 58370fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod mask = basic_mask_array[AKHN] | basic_mask_array[CJCT]; 584075d671f1093d2e3c58f7f45568696030f1b3efdBehdad Esfahbod if (base < end) 585075d671f1093d2e3c58f7f45568696030f1b3efdBehdad Esfahbod info[base].mask |= mask; 586281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod /* Post-base */ 58770fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod mask = basic_mask_array[BLWF] | basic_mask_array[ABVF] | basic_mask_array[PSTF] | basic_mask_array[CJCT]; 5883c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 589281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod info[i].mask |= mask; 590281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod } 5919da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod 59217d7de91d76406d3e92db37d9eef2fc615f06e68Behdad Esfahbod /* XXX This will not match for old-Indic spec since the Halant-Ra order is reversed already. */ 5938e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod if (basic_mask_array[PREF] && base + 3 <= end) 59417d7de91d76406d3e92db37d9eef2fc615f06e68Behdad Esfahbod { 5958e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod /* Find a Halant,Ra sequence and mark it fore pre-base reordering processing. */ 5968e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod for (unsigned int i = base + 1; i + 1 < end; i++) 597deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (is_halant_or_coeng (info[i]) && 5988e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod info[i + 1].indic_category() == OT_Ra) 5998e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod { 6000201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod info[i++].mask |= basic_mask_array[PREF]; 6010201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod info[i++].mask |= basic_mask_array[PREF]; 6020201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod 6030201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod /* Mark the subsequent stuff with 'cfar'. Used in Khmer. 6040201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod * Read the feature spec. 6050201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod * This allows distinguishing the following cases with MS Khmer fonts: 6060201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod * U+1784,U+17D2,U+179A,U+17D2,U+1782 6070201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod * U+1784,U+17D2,U+1782,U+17D2,U+179A 6080201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod */ 6090201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod for (; i < end; i++) 6100201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod info[i].mask |= basic_mask_array[CFAR]; 6110201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod 6128e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod break; 6138e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod } 61417d7de91d76406d3e92db37d9eef2fc615f06e68Behdad Esfahbod } 61517d7de91d76406d3e92db37d9eef2fc615f06e68Behdad Esfahbod 6169da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod /* Apply ZWJ/ZWNJ effects */ 6173c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = start + 1; i < end; i++) 6189da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod if (is_joiner (info[i])) { 6199da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod bool non_joiner = info[i].indic_category() == OT_ZWNJ; 6206b37bc80843e38ca7b62500f95fd70c08af68d62Behdad Esfahbod unsigned int j = i; 6219da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod 6229da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod do { 6239da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod j--; 6246b37bc80843e38ca7b62500f95fd70c08af68d62Behdad Esfahbod 62570fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod info[j].mask &= ~basic_mask_array[CJCT]; 6266b37bc80843e38ca7b62500f95fd70c08af68d62Behdad Esfahbod if (non_joiner) 62770fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod info[j].mask &= ~basic_mask_array[HALF]; 6286b37bc80843e38ca7b62500f95fd70c08af68d62Behdad Esfahbod 6299da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod } while (j > start && !is_consonant (info[j])); 6309da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod } 631743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 632743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 633743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 634743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 6359f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbodinitial_reordering_vowel_syllable (const hb_ot_map_t *map, 6369f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod hb_buffer_t *buffer, 63770fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod hb_mask_t *basic_mask_array, 638ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int start, unsigned int end) 639743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 640c5306b6861cfaa50af40e8ceb058791fa06d7981Behdad Esfahbod /* We made the vowels look like consonants. So let's call the consonant logic! */ 64170fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod initial_reordering_consonant_syllable (map, buffer, basic_mask_array, start, end); 642743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 643743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 644743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 6459f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbodinitial_reordering_standalone_cluster (const hb_ot_map_t *map, 6469f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod hb_buffer_t *buffer, 64770fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod hb_mask_t *basic_mask_array, 648ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int start, unsigned int end) 649743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 65018c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod /* We treat NBSP/dotted-circle as if they are consonants, so we should just chain. 65118c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod * Only if not in compatibility mode that is... */ 65218c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod 653a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod if (indic_options ().uniscribe_bug_compatible) 65418c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod { 65518c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod /* For dotted-circle, this is what Uniscribe does: 65618c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod * If dotted-circle is the last glyph, it just does nothing. 65718c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod * Ie. It doesn't form Reph. */ 65818c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod if (buffer->info[end - 1].indic_category() == OT_DOTTEDCIRCLE) 65918c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod return; 66018c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod } 66118c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod 66270fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod initial_reordering_consonant_syllable (map, buffer, basic_mask_array, start, end); 663743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 664743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 665743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 6669f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbodinitial_reordering_non_indic (const hb_ot_map_t *map HB_UNUSED, 6679f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod hb_buffer_t *buffer HB_UNUSED, 66870fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod hb_mask_t *basic_mask_array HB_UNUSED, 6693f18236a03880c0960f5990dc90685f6146951a6Behdad Esfahbod unsigned int start HB_UNUSED, unsigned int end HB_UNUSED) 670743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 671743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* Nothing to do right now. If we ever switch to using the output 672743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * buffer in the reordering process, we'd need to next_glyph() here. */ 673743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 674743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 675743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod#include "hb-ot-shape-complex-indic-machine.hh" 676743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 677743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 678743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodinitial_reordering (const hb_ot_map_t *map, 6793f18236a03880c0960f5990dc90685f6146951a6Behdad Esfahbod hb_face_t *face HB_UNUSED, 680743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_buffer_t *buffer, 681743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod void *user_data HB_UNUSED) 682743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 68370fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod hb_mask_t basic_mask_array[ARRAY_LENGTH (indic_basic_features)] = {0}; 684b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod unsigned int num_masks = ARRAY_LENGTH (indic_basic_features); 685b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod for (unsigned int i = 0; i < num_masks; i++) 68670fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod basic_mask_array[i] = map->get_1_mask (indic_basic_features[i].tag); 687743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 68870fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod find_syllables (map, buffer, basic_mask_array); 689b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod} 690b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 691743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 69246e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbodfinal_reordering_syllable (hb_buffer_t *buffer, 69346e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod hb_mask_t init_mask, hb_mask_t pref_mask, 694ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int start, unsigned int end) 695743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 6964ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod hb_glyph_info_t *info = buffer->info; 6974ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 698e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod /* 4. Final reordering: 699e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * 700e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * After the localized forms and basic shaping forms GSUB features have been 701e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * applied (see below), the shaping engine performs some final glyph 702e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * reordering before applying all the remaining font features to the entire 703e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * cluster. 7044ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod */ 7054ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 7064ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod /* Find base again */ 7074ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod unsigned int base = end; 7084ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod for (unsigned int i = start; i < end; i++) 7094ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod if (info[i].indic_position() == POS_BASE_C) { 7104ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod base = i; 7114ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod break; 7124ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod } 7134ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 7144705a7026900e51f6430f03a73c87f2df035df92Behdad Esfahbod unsigned int start_of_last_cluster = base; 7154705a7026900e51f6430f03a73c87f2df035df92Behdad Esfahbod 7164ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod /* o Reorder matras: 717e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * 718e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * If a pre-base matra character had been reordered before applying basic 719e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * features, the glyph can be moved closer to the main consonant based on 720e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * whether half-forms had been formed. Actual position for the matra is 721e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * defined as “after last standalone halant glyph, after initial matra 722e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * position and before the main consonant”. If ZWJ or ZWNJ follow this 723e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * halant, position is moved after it. 7244ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod */ 7254ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 726362d3db8d3527d0fef260a17d2466e92a4a25425Behdad Esfahbod if (start < base) /* Otherwise there can't be any pre-base matra characters. */ 7279d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod { 728921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod unsigned int new_pos = base - 1; 729921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod while (new_pos > start && 730deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod !(FLAG (info[new_pos].indic_category()) & (FLAG (OT_M) | FLAG (OT_H) | FLAG (OT_Coeng)))) 731921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod new_pos--; 7329d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod /* If we found no Halant we are done. Otherwise only proceed if the Halant does 7339d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod * not belong to the Matra itself! */ 734deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (is_halant_or_coeng (info[new_pos]) && 735921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod info[new_pos].indic_position() != POS_PRE_M) { 7369d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod /* -> If ZWJ or ZWNJ follow this halant, position is moved after it. */ 737921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod if (new_pos + 1 < end && is_joiner (info[new_pos + 1])) 738921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod new_pos++; 7399d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod 7409d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod /* Now go see if there's actually any matras... */ 741921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod for (unsigned int i = new_pos; i > start; i--) 7426a091df9b403b147ef78f3974610dedf4ce1e08aBehdad Esfahbod if (info[i - 1].indic_position () == POS_PRE_M) 7439d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod { 7441a1dbe9a2787f226f3e43063da8eb6633438b0a0Behdad Esfahbod unsigned int old_pos = i - 1; 7451a1dbe9a2787f226f3e43063da8eb6633438b0a0Behdad Esfahbod hb_glyph_info_t tmp = info[old_pos]; 7461a1dbe9a2787f226f3e43063da8eb6633438b0a0Behdad Esfahbod memmove (&info[old_pos], &info[old_pos + 1], (new_pos - old_pos) * sizeof (info[0])); 7471a1dbe9a2787f226f3e43063da8eb6633438b0a0Behdad Esfahbod info[new_pos] = tmp; 748921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod start_of_last_cluster = MIN (new_pos, start_of_last_cluster); 749921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod new_pos--; 7509d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod } 7519d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod } 7524ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod } 7534ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 7544ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 7554ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod /* o Reorder reph: 756e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * 757e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * Reph’s original position is always at the beginning of the syllable, 758e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * (i.e. it is not reordered at the character reordering stage). However, 759e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * it will be reordered according to the basic-forms shaping results. 760e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * Possible positions for reph, depending on the script, are; after main, 761e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * before post-base consonant forms, and after post-base consonant forms. 762dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod */ 763dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 764dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod /* If there's anything after the Ra that has the REPH pos, it ought to be halant. 765dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * Which means that the font has failed to ligate the Reph. In which case, we 766dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * shouldn't move. */ 767dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod if (start + 1 < end && 768dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod info[start].indic_position() == POS_RA_TO_BECOME_REPH && 769dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod info[start + 1].indic_position() != POS_RA_TO_BECOME_REPH) 770dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod { 77102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod unsigned int new_reph_pos; 77202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 77302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod enum reph_position_t { 774f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod REPH_AFTER_MAIN, 775f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod REPH_BEFORE_SUBSCRIPT, 776f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod REPH_AFTER_SUBSCRIPT, 777f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod REPH_BEFORE_POSTSCRIPT, 7789fc7a11469113d31d8095757c4fc038c3427d44aBehdad Esfahbod REPH_AFTER_POSTSCRIPT 779f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod } reph_pos; 780f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 781f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod /* XXX Figure out old behavior too */ 7827f852b644b8143492a02edfc853114aaa23446bdBehdad Esfahbod switch ((hb_tag_t) buffer->props.script) 783f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod { 784f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_MALAYALAM: 785f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_ORIYA: 786f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_AFTER_MAIN; 787f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 788f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 789f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_GURMUKHI: 790f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_BEFORE_SUBSCRIPT; 791f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 792f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 793f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_BENGALI: 794f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_AFTER_SUBSCRIPT; 795f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 796f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 797f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod default: 798f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_DEVANAGARI: 799f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_GUJARATI: 800f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_BEFORE_POSTSCRIPT; 801f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 802f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 803f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_KANNADA: 804f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_TAMIL: 805f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_TELUGU: 806f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_AFTER_POSTSCRIPT; 807f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 808f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod } 80902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 810dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod /* 1. If reph should be positioned after post-base consonant forms, 811dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * proceed to step 5. 81202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 8139d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod if (reph_pos == REPH_AFTER_POSTSCRIPT) 81402b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 8159d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod goto reph_step_5; 81602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 81702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 81802b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 2. If the reph repositioning class is not after post-base: target 819dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * position is after the first explicit halant glyph between the 820dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * first post-reph consonant and last main consonant. If ZWJ or ZWNJ 821dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * are following this halant, position is moved after it. If such 822dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * position is found, this is the target position. Otherwise, 823dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * proceed to the next step. 824dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * 825dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * Note: in old-implementation fonts, where classifications were 826dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * fixed in shaping engine, there was no case where reph position 827dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * will be found on this step. 82802b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 82902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 83002b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos = start + 1; 831deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod while (new_reph_pos < base && !is_halant_or_coeng (info[new_reph_pos])) 83202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos++; 83302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 834deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (new_reph_pos < base && is_halant_or_coeng (info[new_reph_pos])) { 83502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* ->If ZWJ or ZWNJ are following this halant, position is moved after it. */ 83602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod if (new_reph_pos + 1 < base && is_joiner (info[new_reph_pos + 1])) 83702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos++; 83802b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod goto reph_move; 83902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 84002b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 84102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 84202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 3. If reph should be repositioned after the main consonant: find the 843dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * first consonant not ligated with main, or find the first 844dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * consonant that is not a potential pre-base reordering Ra. 84502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 8469d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod if (reph_pos == REPH_AFTER_MAIN) 84702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 848b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod new_reph_pos = base; 849b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod /* XXX Skip potential pre-base reordering Ra. */ 850b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod while (new_reph_pos < end && 851b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod !( FLAG (info[new_reph_pos + 1].indic_position()) & (FLAG (POS_BELOW_C) | FLAG (POS_POST_C) | FLAG (POS_POST_M) | FLAG (POS_SMVD)))) 852b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod new_reph_pos++; 853b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod if (new_reph_pos < end) 854b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod goto reph_move; 85502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 85602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 85702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 4. If reph should be positioned before post-base consonant, find 858dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * first post-base classified consonant not ligated with main. If no 859dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * consonant is found, the target position should be before the 860dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * first matra, syllable modifier sign or vedic sign. 86102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 8629d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod /* This is our take on what step 4 is trying to say (and failing, BADLY). */ 8639d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod if (reph_pos == REPH_AFTER_SUBSCRIPT) 86402b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 8659d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod new_reph_pos = base; 8669d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod while (new_reph_pos < end && 8676a091df9b403b147ef78f3974610dedf4ce1e08aBehdad Esfahbod !( FLAG (info[new_reph_pos + 1].indic_position()) & (FLAG (POS_POST_C) | FLAG (POS_POST_M) | FLAG (POS_SMVD)))) 8689d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod new_reph_pos++; 8699d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod if (new_reph_pos < end) 8709d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod goto reph_move; 87102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 87202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 87302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 5. If no consonant is found in steps 3 or 4, move reph to a position 874dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * immediately before the first post-base matra, syllable modifier 875dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * sign or vedic sign that has a reordering class after the intended 876dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * reph position. For example, if the reordering position for reph 877dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * is post-main, it will skip above-base matras that also have a 878dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * post-main position. 879dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod */ 88002b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod reph_step_5: 88102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 88202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* XXX */ 88302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 884dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 88502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 6. Otherwise, reorder reph to the end of the syllable. 88602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 88702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 88802b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos = end - 1; 88902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod while (new_reph_pos > start && info[new_reph_pos].indic_position() == POS_SMVD) 89002b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos--; 89102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 892892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod /* 893892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * If the Reph is to be ending up after a Matra,Halant sequence, 894892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * position it before that Halant so it can interact with the Matra. 895892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * However, if it's a plain Consonant,Halant we shouldn't do that. 896892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * Uniscribe doesn't do this. 897892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * TEST: U+0930,U+094D,U+0915,U+094B,U+094D 898892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod */ 899a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod if (!indic_options ().uniscribe_bug_compatible && 900deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod unlikely (is_halant_or_coeng (info[new_reph_pos]))) { 90102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod for (unsigned int i = base + 1; i < new_reph_pos; i++) 90202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod if (info[i].indic_category() == OT_M) { 90302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* Ok, got it. */ 90402b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos--; 90502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 90602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 90702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod goto reph_move; 9088df5636968389ac7bf8620ccd091fd4872b0bbeeBehdad Esfahbod } 9098df5636968389ac7bf8620ccd091fd4872b0bbeeBehdad Esfahbod 91002b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod reph_move: 91102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 91202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* Move */ 91302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod hb_glyph_info_t reph = info[start]; 91402b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod memmove (&info[start], &info[start + 1], (new_reph_pos - start) * sizeof (info[0])); 91502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod info[new_reph_pos] = reph; 91602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod start_of_last_cluster = start; /* Yay, one big cluster! */ 91702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 918dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod } 919dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 920dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 921dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod /* o Reorder pre-base reordering consonants: 922e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * 923e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * If a pre-base reordering consonant is found, reorder it according to 924e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * the following rules: 925e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod */ 926e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod 92746e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod if (pref_mask && base + 1 < end) /* Otherwise there can't be any pre-base reordering Ra. */ 92846e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod { 9298e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 9308e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod if ((info[i].mask & pref_mask) != 0) 93178818124b17691ec2c647142fdb9ae743aa03deeBehdad Esfahbod { 9328e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod /* 1. Only reorder a glyph produced by substitution during application 9338e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * of the <pref> feature. (Note that a font may shape a Ra consonant with 9348e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * the feature generally but block it in certain contexts.) 9358e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod */ 9368e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod if (i + 1 == end || (info[i + 1].mask & pref_mask) == 0) 9378e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod { 9388e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod /* 9398e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * 2. Try to find a target position the same way as for pre-base matra. 9408e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * If it is found, reorder pre-base consonant glyph. 9418e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * 9428e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * 3. If position is not found, reorder immediately before main 9438e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * consonant. 9448e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod */ 9458e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod 9468e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod unsigned int new_pos = base; 9478e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod while (new_pos > start + 1 && 948deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod !(FLAG (info[new_pos - 1].indic_category()) & (FLAG (OT_M) | FLAG (OT_H) | FLAG (OT_Coeng)))) 9498e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod new_pos--; 9508e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod 951deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (new_pos > start && is_halant_or_coeng (info[new_pos - 1])) 9528e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod /* -> If ZWJ or ZWNJ follow this halant, position is moved after it. */ 9538e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod if (new_pos < end && is_joiner (info[new_pos])) 9548e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod new_pos++; 9558e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod 9568e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod { 9578e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod unsigned int old_pos = i; 9588e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod hb_glyph_info_t tmp = info[old_pos]; 9598e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod memmove (&info[new_pos + 1], &info[new_pos], (old_pos - new_pos) * sizeof (info[0])); 9608e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod info[new_pos] = tmp; 9618e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod start_of_last_cluster = MIN (new_pos, start_of_last_cluster); 9628e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod } 9638e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod } 9648e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod 9658e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod break; 96678818124b17691ec2c647142fdb9ae743aa03deeBehdad Esfahbod } 96746e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod } 968eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 969eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 970a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod /* Apply 'init' to the Left Matra if it's a word start. */ 9716a091df9b403b147ef78f3974610dedf4ce1e08aBehdad Esfahbod if (info[start].indic_position () == POS_PRE_M && 972a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod (!start || 973eace47b173807d94b29a6490d0bc3c9f8f6168d1Behdad Esfahbod !(FLAG (_hb_glyph_info_get_general_category (&info[start - 1])) & 974a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod (FLAG (HB_UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER) | 975a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod FLAG (HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER) | 976a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod FLAG (HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER) | 977a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod FLAG (HB_UNICODE_GENERAL_CATEGORY_TITLECASE_LETTER) | 978a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod FLAG (HB_UNICODE_GENERAL_CATEGORY_UPPERCASE_LETTER) | 979a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod FLAG (HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK) | 980a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod FLAG (HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK) | 981a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod FLAG (HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK))))) 98246e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod info[start].mask |= init_mask; 983a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod 984eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 98521d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod 98621d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod /* Finish off the clusters and go home! */ 98721d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod 988a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod if (!indic_options ().uniscribe_bug_compatible) 989ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod { 99021d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod /* This is what Uniscribe does. Ie. add cluster boundaries after Halant,ZWNJ. 99121d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod * This means, half forms are submerged into the main consonants cluster. 99221d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod * This is unnecessary, and makes cursor positioning harder, but that's what 99321d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod * Uniscribe does. */ 99421d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod unsigned int cluster_start = start; 99521d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod for (unsigned int i = start + 1; i < start_of_last_cluster; i++) 996deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (is_halant_or_coeng (info[i - 1]) && info[i].indic_category() == OT_ZWNJ) { 99721d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod i++; 99821d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod buffer->merge_clusters (cluster_start, i); 99921d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod cluster_start = i; 100021d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod } 100121d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod start_of_last_cluster = cluster_start; 100221d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod } 100321d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod 100421d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod buffer->merge_clusters (start_of_last_cluster, end); 1005ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod} 1006e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod 1007e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod 1008ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbodstatic void 1009ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbodfinal_reordering (const hb_ot_map_t *map, 10103f18236a03880c0960f5990dc90685f6146951a6Behdad Esfahbod hb_face_t *face HB_UNUSED, 1011ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod hb_buffer_t *buffer, 1012ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod void *user_data HB_UNUSED) 1013ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod{ 1014ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int count = buffer->len; 1015ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod if (!count) return; 1016ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod 101746e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod hb_mask_t init_mask = map->get_1_mask (HB_TAG('i','n','i','t')); 101846e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod hb_mask_t pref_mask = map->get_1_mask (HB_TAG('p','r','e','f')); 1019eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 1020ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod hb_glyph_info_t *info = buffer->info; 1021ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int last = 0; 1022cee7187447b76b22e1bb6136d137b35ac49c3a5dBehdad Esfahbod unsigned int last_syllable = info[0].syllable(); 1023ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod for (unsigned int i = 1; i < count; i++) 1024cee7187447b76b22e1bb6136d137b35ac49c3a5dBehdad Esfahbod if (last_syllable != info[i].syllable()) { 102546e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod final_reordering_syllable (buffer, init_mask, pref_mask, last, i); 1026ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod last = i; 1027cee7187447b76b22e1bb6136d137b35ac49c3a5dBehdad Esfahbod last_syllable = info[last].syllable(); 1028ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod } 102946e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod final_reordering_syllable (buffer, init_mask, pref_mask, last, count); 1030e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod 1031743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod HB_BUFFER_DEALLOCATE_VAR (buffer, indic_category); 1032743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod HB_BUFFER_DEALLOCATE_VAR (buffer, indic_position); 1033743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 1034743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 1035743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 1036b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 1037