hb-ot-shape-complex-indic.cc revision 1e7d860613032e40a3f90e2caa2ee5ac44ab8c8c
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" 2949c5ec51444f27f33e1eb6aa1959c61b08fa89c0Behdad Esfahbod#include "hb-ot-layout-private.hh" 30352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod 31a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod#define OLD_INDIC_TAG(script) (((hb_tag_t) script) | 0x20000000) 32a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod#define IS_OLD_INDIC_TAG(tag) ( \ 33a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_BENGALI) || \ 34a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_DEVANAGARI) || \ 35a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_GUJARATI) || \ 36a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_GURMUKHI) || \ 37a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_KANNADA) || \ 38a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_MALAYALAM) || \ 39a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_ORIYA) || \ 40a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_TAMIL) || \ 41a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod (tag) == OLD_INDIC_TAG (HB_SCRIPT_TELUGU) \ 42a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod ) 43a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodstruct indic_options_t 44ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod{ 45a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod int initialized : 1; 46a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod int uniscribe_bug_compatible : 1; 47a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod}; 48a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 49a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodunion indic_options_union_t { 50a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod int i; 51a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod indic_options_t opts; 52a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod}; 53a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad EsfahbodASSERT_STATIC (sizeof (int) == sizeof (indic_options_union_t)); 54a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 55a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodstatic indic_options_union_t 56a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodindic_options_init (void) 57a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod{ 58a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod indic_options_union_t u; 59a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod u.i = 0; 60a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod u.opts.initialized = 1; 61a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 62a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod char *c = getenv ("HB_OT_INDIC_OPTIONS"); 63a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod u.opts.uniscribe_bug_compatible = c && strstr (c, "uniscribe-bug-compatible"); 64a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 65a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod return u; 66a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod} 67a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 68a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodinline indic_options_t 69a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbodindic_options (void) 70a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod{ 71a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod static indic_options_union_t options; 72a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 73a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod if (unlikely (!options.i)) { 74a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod /* This is idempotent and threadsafe. */ 75a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod options = indic_options_init (); 76ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod } 77ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod 78a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod return options.opts; 79a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod} 80a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod 81ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod 82743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic int 83743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodcompare_codepoint (const void *pa, const void *pb) 84743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 85743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_codepoint_t a = * (hb_codepoint_t *) pa; 86743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_codepoint_t b = * (hb_codepoint_t *) pb; 87743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 88743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod return a < b ? -1 : a == b ? 0 : +1; 89743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 90743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 91f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbodstatic bool 92693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodwould_substitute (hb_codepoint_t *glyphs, 93693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod unsigned int glyphs_count, 94693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod hb_tag_t feature_tag, 95693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod const hb_ot_map_t *map, 96693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod hb_face_t *face) 97743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 98f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod unsigned int lookup_indices[32]; 99f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod unsigned int offset, len; 100f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod 101f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod offset = 0; 102f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod do { 103f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod len = ARRAY_LENGTH (lookup_indices); 104f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod hb_ot_layout_feature_get_lookup_indexes (face, HB_OT_TAG_GSUB, 105f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod map->get_feature_index (0/*GSUB*/, feature_tag), 106f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod offset, 107f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod &len, 108f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod lookup_indices); 109f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod 110f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod for (unsigned int i = 0; i < len; i++) 111f860366456d9e59b139a940da6d89c3c4fb9e96eBehdad Esfahbod if (hb_ot_layout_would_substitute_lookup_fast (face, glyphs, glyphs_count, lookup_indices[i])) 112f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod return true; 113f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod 114f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod offset += len; 115f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod } while (len == ARRAY_LENGTH (lookup_indices)); 116f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod 117f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod return false; 118f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod} 119743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 120f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbodstatic indic_position_t 121693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodconsonant_position (hb_codepoint_t u, 122693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod const hb_ot_map_t *map, 123693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod hb_font_t *font) 124f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod{ 1255249f3aee108b0f41770d137e63a625f594418e7Behdad Esfahbod if ((u & ~0x007F) == 0x1780) 1265249f3aee108b0f41770d137e63a625f594418e7Behdad Esfahbod return POS_BELOW_C; /* In Khmer coeng model, all are subjoining. */ 1275249f3aee108b0f41770d137e63a625f594418e7Behdad Esfahbod 128f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod hb_codepoint_t virama = (u & ~0x007F) | 0x004D; 129f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod if ((u & ~0x007F) == 0x0D80) virama = 0x0DCA; /* Sinahla */ 130f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod hb_codepoint_t glyphs[2]; 131f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod 13251e764de441072e7c9f67de23e8ed717b9b8957dBehdad Esfahbod unsigned int virama_pos = IS_OLD_INDIC_TAG (map->get_chosen_script (0)) ? 1 : 0; 13351e764de441072e7c9f67de23e8ed717b9b8957dBehdad Esfahbod hb_font_get_glyph (font, virama, 0, &glyphs[virama_pos]); 13451e764de441072e7c9f67de23e8ed717b9b8957dBehdad Esfahbod hb_font_get_glyph (font, u, 0, &glyphs[1-virama_pos]); 135f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod 136f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod hb_face_t *face = hb_font_get_face (font); 137f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod if (would_substitute (glyphs, ARRAY_LENGTH (glyphs), HB_TAG('p','r','e','f'), map, face)) return POS_BELOW_C; 138f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod if (would_substitute (glyphs, ARRAY_LENGTH (glyphs), HB_TAG('b','l','w','f'), map, face)) return POS_BELOW_C; 139f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod if (would_substitute (glyphs, ARRAY_LENGTH (glyphs), HB_TAG('p','s','t','f'), map, face)) return POS_POST_C; 140f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod return POS_BASE_C; 141743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 142743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 1438bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod#define MATRA_POS_LEFT(u) POS_PRE_M 1448c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod#define MATRA_POS_RIGHT(u) ( \ 1458c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_DEVA(u) ? POS_AFTER_SUB : \ 1468c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_BENG(u) ? POS_AFTER_POST : \ 1478c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_GURM(u) ? POS_AFTER_POST : \ 1488c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_GUJA(u) ? POS_AFTER_POST : \ 1498c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_ORYA(u) ? POS_AFTER_POST : \ 1508c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_TAML(u) ? POS_AFTER_POST : \ 151fa247ebe524f92fa95d344ba912f704262879c13Behdad Esfahbod IS_TELU(u) ? (u <= 0x0C42 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \ 15287cd63266e73af316b250573ef57388a0bcc9133Behdad Esfahbod IS_KNDA(u) ? (u < 0x0CC3 || u > 0xCD6 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \ 1538c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_MLYM(u) ? POS_AFTER_POST : \ 1548c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_SINH(u) ? POS_AFTER_SUB : \ 1558c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod /*default*/ POS_AFTER_SUB \ 1568c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod ) 1578c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod#define MATRA_POS_TOP(u) ( /* BENG and MLYM don't have top matras. */ \ 1588c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_DEVA(u) ? POS_AFTER_SUB : \ 1596411e74caf23af7b0545f1fe54d19a1c8da895e8Behdad Esfahbod IS_GURM(u) ? POS_AFTER_POST : /* Deviate from spec */ \ 1608c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_GUJA(u) ? POS_AFTER_SUB : \ 1618c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_ORYA(u) ? POS_AFTER_MAIN : \ 1628c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_TAML(u) ? POS_AFTER_SUB : \ 1638c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_TELU(u) ? POS_BEFORE_SUB : \ 1648c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_KNDA(u) ? POS_BEFORE_SUB : \ 1658c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_SINH(u) ? POS_AFTER_SUB : \ 1668c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod /*default*/ POS_AFTER_SUB \ 1678c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod ) 1688c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod#define MATRA_POS_BOTTOM(u) ( \ 1698c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_DEVA(u) ? POS_AFTER_SUB : \ 1708c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_BENG(u) ? POS_AFTER_SUB : \ 1718c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_GURM(u) ? POS_AFTER_POST : \ 1728c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_GUJA(u) ? POS_AFTER_POST : \ 1738c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_ORYA(u) ? POS_AFTER_SUB : \ 1748c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_TAML(u) ? POS_AFTER_POST : \ 1758c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_TELU(u) ? POS_BEFORE_SUB : \ 1768c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_KNDA(u) ? POS_BEFORE_SUB : \ 1778c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_MLYM(u) ? POS_AFTER_POST : \ 1788c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod IS_SINH(u) ? POS_AFTER_SUB : \ 1798c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod /*default*/ POS_AFTER_SUB \ 1808c973ebf0f59abb5ee920edd5d64e23d8e47ad75Behdad Esfahbod ) 1818bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 1828bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 1838bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbodstatic indic_position_t 1848bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbodmatra_position (hb_codepoint_t u, indic_position_t side) 1858bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod{ 1868bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod switch ((int) side) 1878bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod { 1888bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod case POS_PRE_C: return MATRA_POS_LEFT (u); 1898bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod case POS_POST_C: return MATRA_POS_RIGHT (u); 1908bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod case POS_ABOVE_C: return MATRA_POS_TOP (u); 1918bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod case POS_BELOW_C: return MATRA_POS_BOTTOM (u); 1928bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod }; 1938bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod abort (); 1948bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod} 1958bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 196771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbodstatic inline bool 197352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbodis_ra (hb_codepoint_t u) 198352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod{ 199352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod return !!bsearch (&u, ra_chars, 200352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod ARRAY_LENGTH (ra_chars), 201352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod sizeof (ra_chars[0]), 202352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod compare_codepoint); 203352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod} 204352372ae5ea0998e40cf9fe43c22b6b610a5764eBehdad Esfahbod 205771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbodstatic inline bool 206771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbodis_one_of (const hb_glyph_info_t &info, unsigned int flags) 207771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod{ 208771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod /* If it ligated, all bets are off. */ 209c3e6fdc3791168cf2b4c9412e751f187d58faa42Behdad Esfahbod if (is_a_ligature (info)) return false; 210771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod return !!(FLAG (info.indic_category()) & flags); 211771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod} 212771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod 2139ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod#define JOINER_FLAGS (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ)) 214771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbodstatic inline bool 2159da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbodis_joiner (const hb_glyph_info_t &info) 2169ee27a928a989c71923cef82a9e9828f8e9ca051Behdad Esfahbod{ 217771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod return is_one_of (info, JOINER_FLAGS); 2189da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod} 2199da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod 220771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod/* Note: 221771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod * 222771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod * We treat Vowels and placeholders as if they were consonants. This is safe because Vowels 223771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod * cannot happen in a consonant syllable. The plus side however is, we can call the 224771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod * consonant syllable logic from the vowel syllable function and get it all right! */ 2259ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod#define CONSONANT_FLAGS (FLAG (OT_C) | FLAG (OT_Ra) | FLAG (OT_V) | FLAG (OT_NBSP) | FLAG (OT_DOTTEDCIRCLE)) 226771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbodstatic inline bool 2279da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbodis_consonant (const hb_glyph_info_t &info) 2289da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod{ 229771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod return is_one_of (info, CONSONANT_FLAGS); 2309ee27a928a989c71923cef82a9e9828f8e9ca051Behdad Esfahbod} 231c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod 2329ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod#define HALANT_OR_COENG_FLAGS (FLAG (OT_H) | FLAG (OT_Coeng)) 233771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbodstatic inline bool 234deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbodis_halant_or_coeng (const hb_glyph_info_t &info) 235deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod{ 236771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod return is_one_of (info, HALANT_OR_COENG_FLAGS); 237baacd090df97610e3f6d1b2a110dc67b6c6f9f5cBehdad Esfahbod} 238baacd090df97610e3f6d1b2a110dc67b6c6f9f5cBehdad Esfahbod 2399ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbodstatic inline void 240693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodset_indic_properties (hb_glyph_info_t &info, 241693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod const hb_ot_map_t *map, 242693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod hb_font_t *font) 2439ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod{ 2449ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod hb_codepoint_t u = info.codepoint; 2459ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod unsigned int type = get_indic_categories (u); 2466824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod indic_category_t cat = (indic_category_t) (type & 0x0F); 2476824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod indic_position_t pos = (indic_position_t) (type >> 4); 2488bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 2498bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 2508bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod /* 2516824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod * Re-assign category 2528bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod */ 2538bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 2549ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 2559ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod /* The spec says U+0952 is OT_A. However, testing shows that Uniscribe 2569ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * treats U+0951..U+0952 all as OT_VD. 2579ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * TESTS: 2589ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * U+092E,U+0947,U+0952 2599ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * U+092E,U+0952,U+0947 2609ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * U+092E,U+0947,U+0951 2619ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * U+092E,U+0951,U+0947 2629ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * */ 2639ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x0951, 0x0954))) 2649ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod cat = OT_VD; 2659ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 266330b329c8905a37ca88c556dea82c70d74c77458Behdad Esfahbod if (unlikely (u == 0x17D1)) 267330b329c8905a37ca88c556dea82c70d74c77458Behdad Esfahbod cat = OT_X; 2689ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod if (cat == OT_X && 2696824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod unlikely (hb_in_range<hb_codepoint_t> (u, 0x17CB, 0x17D3))) /* Khmer Various signs */ 2706824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod { 2716824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod /* These are like Top Matras. */ 2726824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod cat = OT_M; 2736824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod pos = POS_ABOVE_C; 2746824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod } 2758d00e8d0e7d10f823e6975fecaffb9d557b1a99aBehdad Esfahbod if (u == 0x17C6) /* Khmer Bindu doesn't like to be repositioned. */ 2768d00e8d0e7d10f823e6975fecaffb9d557b1a99aBehdad Esfahbod cat = OT_N; 2779ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 2788bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod if (unlikely (u == 0x17D2)) cat = OT_Coeng; /* Khmer coeng */ 2798bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod else if (unlikely (u == 0x200C)) cat = OT_ZWNJ; 2808bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod else if (unlikely (u == 0x200D)) cat = OT_ZWJ; 2818bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod else if (unlikely (u == 0x25CC)) cat = OT_DOTTEDCIRCLE; 2823604d64ced909ade91998d294a7b4b2ee14d47aaBehdad Esfahbod else if (unlikely (u == 0x0A71)) cat = OT_SM; /* GURMUKHI ADDAK. More like consonant medial. like 0A75. */ 2839ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 2849ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod if (cat == OT_Repha) { 2859ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod /* There are two kinds of characters marked as Repha: 2869ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * - The ones that are GenCat=Mn are already positioned visually, ie. after base. (eg. Khmer) 2879ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * - The ones that are GenCat=Lo is encoded logically, ie. beginning of syllable. (eg. Malayalam) 2889ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * 2899ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod * We recategorize the first kind to look like a Nukta and attached to the base directly. 2909ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod */ 2919ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod if (_hb_glyph_info_get_general_category (&info) == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) 2929ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod cat = OT_N; 2939ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod } 2949ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 2959ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 2968bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 2978bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod /* 2986824a7194e01b77eddb95bd95a9b32e219140912Behdad Esfahbod * Re-assign position. 2998bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod */ 3008bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 3018bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod if ((FLAG (cat) & CONSONANT_FLAGS)) 3028bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod { 303f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod pos = consonant_position (u, map, font); 3049ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod if (is_ra (u)) 3059ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod cat = OT_Ra; 3068bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod } 3078bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod else if (cat == OT_M) 3088bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod { 3098bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod pos = matra_position (u, pos); 3108bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod } 3118bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod else if (cat == OT_SM || cat == OT_VD) 3128bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod { 3139ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod pos = POS_SMVD; 3148bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod } 3158bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 316bdd080431a40bc941ece3230f338b94a46bd12a2Behdad Esfahbod if (unlikely (u == 0x0B01)) pos = POS_BEFORE_SUB; /* Oriya Bindu is BeforeSub in the spec. */ 3178bb32458f95f13f66688e0811cc91f1bfffb867dBehdad Esfahbod 3187573799126e812a047daa5f64121ec959866b3c8Behdad Esfahbod 3199ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 3209ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod info.indic_category() = cat; 3219ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod info.indic_position() = pos; 3229ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod} 3239ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 3249ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 3259ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 3269ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 3279ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 3289ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 3299ccc6382ba43760167c134c18c1c4ada4b8c3f22Behdad Esfahbod 330eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodstruct feature_list_t { 331c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod hb_tag_t tag; 332c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod hb_bool_t is_global; 333eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod}; 334eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 335d5c4edcdd6df32f2f23aca44f14838b4baab4d7aBehdad Esfahbod/* These features are applied one at a time, given the order in this table. */ 336eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodstatic const feature_list_t 337eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodindic_basic_features[] = 338b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod{ 339c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('n','u','k','t'), true}, 340e0475345d5d7db8dbc8b554beedfa2435c5d7fd1Behdad Esfahbod {HB_TAG('a','k','h','n'), true}, 341c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('r','p','h','f'), false}, 3421ac075b227090a9ad930dcc1670236c176b27067Behdad Esfahbod {HB_TAG('r','k','r','f'), true}, 343c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('p','r','e','f'), false}, 344c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('b','l','w','f'), false}, 345c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('h','a','l','f'), false}, 34629f106d7fba25e1464debd3a4831a7380d75c4c9Behdad Esfahbod {HB_TAG('a','b','v','f'), false}, 347c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod {HB_TAG('p','s','t','f'), false}, 3480201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod {HB_TAG('c','f','a','r'), false}, 34920b68e699f73e6ce046c0ec143d40b3d6d48e06bBehdad Esfahbod {HB_TAG('c','j','c','t'), true}, 3501d6846db9ebf84561bb30a4e48c6c43184914099Behdad Esfahbod {HB_TAG('v','a','t','u'), true}, 351c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod}; 352c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod 353c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod/* Same order as the indic_basic_features array */ 354c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbodenum { 355c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod _NUKT, 356e0475345d5d7db8dbc8b554beedfa2435c5d7fd1Behdad Esfahbod _AKHN, 357c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod RPHF, 358df6d45c693c417bf311e6fa49f18a8558542e525Behdad Esfahbod _RKRF, 359c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod PREF, 360c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod BLWF, 361c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod HALF, 36229f106d7fba25e1464debd3a4831a7380d75c4c9Behdad Esfahbod ABVF, 363c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod PSTF, 3640201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod CFAR, 36520b68e699f73e6ce046c0ec143d40b3d6d48e06bBehdad Esfahbod _CJCT, 3661d6846db9ebf84561bb30a4e48c6c43184914099Behdad Esfahbod VATU 367b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod}; 368b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 369d5c4edcdd6df32f2f23aca44f14838b4baab4d7aBehdad Esfahbod/* These features are applied all at once. */ 370eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodstatic const feature_list_t 371eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbodindic_other_features[] = 372b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod{ 373eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('i','n','i','t'), false}, 374eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('p','r','e','s'), true}, 375eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('a','b','v','s'), true}, 376eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('b','l','w','s'), true}, 377eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('p','s','t','s'), true}, 378eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('h','a','l','n'), true}, 379eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 380eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('d','i','s','t'), true}, 381eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('a','b','v','m'), true}, 382eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod {HB_TAG('b','l','w','m'), true}, 383eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod}; 384eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 385743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 386743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 387743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodinitial_reordering (const hb_ot_map_t *map, 388743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_face_t *face, 389743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_buffer_t *buffer, 390743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod void *user_data HB_UNUSED); 391f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbodstatic void 392f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbodfinal_reordering (const hb_ot_map_t *map, 393f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod hb_face_t *face, 394f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod hb_buffer_t *buffer, 395743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod void *user_data HB_UNUSED); 396b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 397693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodstatic void 398693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodcollect_features_indic (const hb_ot_complex_shaper_t *shaper, 399693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod hb_ot_map_builder_t *map, 400693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod const hb_segment_properties_t *props) 401b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod{ 402f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod map->add_bool_feature (HB_TAG('l','o','c','l')); 403a54a5505a35eef5315a8e2e7a79502901e3eff5fBehdad Esfahbod /* The Indic specs do not require ccmp, but we apply it here since if 404a54a5505a35eef5315a8e2e7a79502901e3eff5fBehdad Esfahbod * there is a use of it, it's typically at the beginning. */ 405f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod map->add_bool_feature (HB_TAG('c','c','m','p')); 406f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod 407743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod map->add_gsub_pause (initial_reordering, NULL); 408f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod 409412b91889d9a1ae477e8b6907d0b9a76e78a6c91Behdad Esfahbod for (unsigned int i = 0; i < ARRAY_LENGTH (indic_basic_features); i++) { 41076f76812ac7cca8ac6935952a2360d5e151480faBehdad Esfahbod map->add_bool_feature (indic_basic_features[i].tag, indic_basic_features[i].is_global); 411412b91889d9a1ae477e8b6907d0b9a76e78a6c91Behdad Esfahbod map->add_gsub_pause (NULL, NULL); 412412b91889d9a1ae477e8b6907d0b9a76e78a6c91Behdad Esfahbod } 413b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 414f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod map->add_gsub_pause (final_reordering, NULL); 415f6fd3780e12b23ff7ed3743497c8996e71dcb064Behdad Esfahbod 416d5c4edcdd6df32f2f23aca44f14838b4baab4d7aBehdad Esfahbod for (unsigned int i = 0; i < ARRAY_LENGTH (indic_other_features); i++) 417eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod map->add_bool_feature (indic_other_features[i].tag, indic_other_features[i].is_global); 418b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod} 419b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 420693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodstatic void 421693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodoverride_features_indic (const hb_ot_complex_shaper_t *shaper, 422693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod hb_ot_map_builder_t *map, 423693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod const hb_segment_properties_t *props) 424d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbod{ 425af92b4cc90e4184d5bdd8037c551ed482700114fBehdad Esfahbod /* Uniscribe does not apply 'kern'. */ 426af92b4cc90e4184d5bdd8037c551ed482700114fBehdad Esfahbod if (indic_options ().uniscribe_bug_compatible) 427af92b4cc90e4184d5bdd8037c551ed482700114fBehdad Esfahbod map->add_feature (HB_TAG('k','e','r','n'), 0, true); 428d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbod} 429d96838ef951ce6170eb2dc576ebcba2262cf7008Behdad Esfahbod 430867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 431693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodstatic void 432693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodsetup_masks_indic (const hb_ot_complex_shaper_t *shaper, 433693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod const hb_ot_map_t *map, 434693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod hb_buffer_t *buffer, 435693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod hb_font_t *font) 436b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod{ 4379f9bcceca6321d5a5812f878de1de39901349a78Behdad Esfahbod HB_BUFFER_ALLOCATE_VAR (buffer, indic_category); 4389f9bcceca6321d5a5812f878de1de39901349a78Behdad Esfahbod HB_BUFFER_ALLOCATE_VAR (buffer, indic_position); 4399f9bcceca6321d5a5812f878de1de39901349a78Behdad Esfahbod 440743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* We cannot setup masks here. We save information about characters 441743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * and setup masks later on in a pause-callback. */ 442743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 443743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod unsigned int count = buffer->len; 444b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod for (unsigned int i = 0; i < count; i++) 445f055442716ec7543ed156d4789955b19c11a5255Behdad Esfahbod set_indic_properties (buffer->info[i], map, font); 446743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 447b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 44845d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbodstatic int 44945d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbodcompare_indic_order (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb) 45045d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod{ 45145d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod int a = pa->indic_position(); 45245d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod int b = pb->indic_position(); 45345d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 45445d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod return a < b ? -1 : a == b ? 0 : +1; 45545d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod} 456867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 4577ea58db311bfb0d8f804d1e9f4a1f004bd45075aBehdad Esfahbod/* Rules from: 4587ea58db311bfb0d8f804d1e9f4a1f004bd45075aBehdad Esfahbod * https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx */ 4597ea58db311bfb0d8f804d1e9f4a1f004bd45075aBehdad Esfahbod 460743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 46170fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbodinitial_reordering_consonant_syllable (const hb_ot_map_t *map, hb_buffer_t *buffer, hb_mask_t *basic_mask_array, 462ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int start, unsigned int end) 463743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 464ee58f3bc75d2d071a71b94063bf12205a5871acbBehdad Esfahbod hb_glyph_info_t *info = buffer->info; 465743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 466617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod 467743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* 1. Find base consonant: 468743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 469743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * The shaping engine finds the base consonant of the syllable, using the 470743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * following algorithm: starting from the end of the syllable, move backwards 471743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * until a consonant is found that does not have a below-base or post-base 472743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * form (post-base forms have to follow below-base forms), or that is not a 473743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * pre-base reordering Ra, or arrive at the first consonant. The consonant 474743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * stopped at will be the base. 475743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 476743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o If the syllable starts with Ra + Halant (in a script that has Reph) 477743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * and has more than one consonant, Ra is excluded from candidates for 478743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * base consonants. 479743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod */ 480743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 4815e72071062c015237b79fbd0521341a63166a204Behdad Esfahbod unsigned int base = end; 48276b3409de6887c1cdd5c679939497b1b56f4554bBehdad Esfahbod bool has_reph = false; 483743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 48476b3409de6887c1cdd5c679939497b1b56f4554bBehdad Esfahbod { 485617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod /* -> If the syllable starts with Ra + Halant (in a script that has Reph) 486617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod * and has more than one consonant, Ra is excluded from candidates for 487617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod * base consonants. */ 488617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod unsigned int limit = start; 48970fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod if (basic_mask_array[RPHF] && 490617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod start + 3 <= end && 491617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod info[start].indic_category() == OT_Ra && 492617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod info[start + 1].indic_category() == OT_H && 493f31d97e44eeb6fb141f3de928e27e033fc7b1f47Behdad Esfahbod (unlikely (buffer->props.script == HB_SCRIPT_SINHALA || buffer->props.script == HB_SCRIPT_TELUGU) ? 494f31d97e44eeb6fb141f3de928e27e033fc7b1f47Behdad Esfahbod info[start + 2].indic_category() == OT_ZWJ /* In Sinhala & Telugu, form Reph only if ZWJ is present */: 4953285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod !is_joiner (info[start + 2] /* In other scripts, any joiner blocks Reph formation */ ) 4963285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod )) 497617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod { 498617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod limit += 2; 4993285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod while (limit < end && is_joiner (info[limit])) 5003285e107c9a83aeb552e67f9460680ff6d167d88Behdad Esfahbod limit++; 501617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod base = start; 502617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod has_reph = true; 503617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod }; 50476b3409de6887c1cdd5c679939497b1b56f4554bBehdad Esfahbod 50514dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod enum base_position_t { 50614dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod BASE_FIRST, 50714dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod BASE_LAST 50814dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod } base_pos; 50914dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod 51014dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod switch ((hb_tag_t) buffer->props.script) 51114dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod { 51234c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod case HB_SCRIPT_SINHALA: 51314dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod case HB_SCRIPT_KHMER: 51414dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod base_pos = BASE_FIRST; 51514dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod break; 51614dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod 51714dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod default: 51814dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod base_pos = BASE_LAST; 51914dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod break; 52014dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod } 52114dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod 52214dbdd9e39d3a869fd1521000c889c347433d22bBehdad Esfahbod if (base_pos == BASE_LAST) 5235d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod { 5245d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> starting from the end of the syllable, move backwards */ 5255d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod unsigned int i = end; 52692a1ad7bef9efb456ab87bd63818cfbed7da3f6fBehdad Esfahbod bool seen_below = false; 5275d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod do { 5285d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod i--; 5295d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> until a consonant is found */ 5305d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod if (is_consonant (info[i])) 5313c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod { 5325d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> that does not have a below-base or post-base form 5335d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod * (post-base forms have to follow below-base forms), */ 5345d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod if (info[i].indic_position() != POS_BELOW_C && 53592a1ad7bef9efb456ab87bd63818cfbed7da3f6fBehdad Esfahbod (info[i].indic_position() != POS_POST_C || seen_below)) 5365d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod { 5375d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod base = i; 5385d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod break; 5395d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod } 54092a1ad7bef9efb456ab87bd63818cfbed7da3f6fBehdad Esfahbod if (info[i].indic_position() == POS_BELOW_C) 54192a1ad7bef9efb456ab87bd63818cfbed7da3f6fBehdad Esfahbod seen_below = true; 5425d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod 5435d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> or that is not a pre-base reordering Ra, 5445d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod * 54525e302da9a712e6f1d63b0d243a8df0d326ddba3Behdad Esfahbod * IMPLEMENTATION NOTES: 54625e302da9a712e6f1d63b0d243a8df0d326ddba3Behdad Esfahbod * 54725e302da9a712e6f1d63b0d243a8df0d326ddba3Behdad Esfahbod * Our pre-base reordering Ra's are marked POS_BELOW, so will be skipped 54825e302da9a712e6f1d63b0d243a8df0d326ddba3Behdad Esfahbod * by the logic above already. 5495d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod */ 5505d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod 5515d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* -> or arrive at the first consonant. The consonant stopped at will 5525d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod * be the base. */ 5533c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod base = i; 5543c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod } 5555d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod else 556a9e45c32e4a0d6da33c52f8427aa694e57f52eb9Behdad Esfahbod { 55788f413b56f2858d149e2fc067685aeecaea779caBehdad Esfahbod /* A ZWJ after a Halant stops the base search, and requests an explicit 55888f413b56f2858d149e2fc067685aeecaea779caBehdad Esfahbod * half form. 55988f413b56f2858d149e2fc067685aeecaea779caBehdad Esfahbod * A ZWJ before a Halant, requests a subjoined form instead, and hence 56088f413b56f2858d149e2fc067685aeecaea779caBehdad Esfahbod * search continues. This is particularly important for Bengali 56188f413b56f2858d149e2fc067685aeecaea779caBehdad Esfahbod * sequence Ra,H,Ya that shouls form Ya-Phalaa by subjoining Ya. */ 56288f413b56f2858d149e2fc067685aeecaea779caBehdad Esfahbod if (start < i && 56388f413b56f2858d149e2fc067685aeecaea779caBehdad Esfahbod info[i].indic_category() == OT_ZWJ && 56488f413b56f2858d149e2fc067685aeecaea779caBehdad Esfahbod info[i - 1].indic_category() == OT_H) 5655d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod break; 566a9e45c32e4a0d6da33c52f8427aa694e57f52eb9Behdad Esfahbod } 5675d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod } while (i > limit); 5685d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod } 5695d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod else 5705d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod { 5715d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod /* In scripts without half forms (eg. Khmer), the first consonant is always the base. */ 5725d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod 5735d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod if (!has_reph) 5745d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod base = limit; 57534c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod 57634c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod /* Find the last base consonant that is not blocked by ZWJ. If there is 57771fd5e80ad06c8e85a1112cc89e129d6cd03f82cBehdad Esfahbod * a ZWJ right before a base consonant, that would request a subjoined form. */ 57834c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod for (unsigned int i = limit; i < end; i++) 57934c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod if (is_consonant (info[i]) && info[i].indic_position() == POS_BASE_C) 58071fd5e80ad06c8e85a1112cc89e129d6cd03f82cBehdad Esfahbod { 58171fd5e80ad06c8e85a1112cc89e129d6cd03f82cBehdad Esfahbod if (limit < i && info[i - 1].indic_category() == OT_ZWJ) 58271fd5e80ad06c8e85a1112cc89e129d6cd03f82cBehdad Esfahbod break; 58371fd5e80ad06c8e85a1112cc89e129d6cd03f82cBehdad Esfahbod else 58471fd5e80ad06c8e85a1112cc89e129d6cd03f82cBehdad Esfahbod base = i; 58571fd5e80ad06c8e85a1112cc89e129d6cd03f82cBehdad Esfahbod } 58634c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod 58734c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod /* Mark all subsequent consonants as below. */ 58834c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 58934c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod if (is_consonant (info[i]) && info[i].indic_position() == POS_BASE_C) 59034c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod info[i].indic_position() = POS_BELOW_C; 5915d32690a3428fa86eb26fe5fcec943a10aa95881Behdad Esfahbod } 592743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 593617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod /* -> If the syllable starts with Ra + Halant (in a script that has Reph) 594617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod * and has more than one consonant, Ra is excluded from candidates for 5952278eefcdb3dd0d492b9d07176fbecc1f0516bb7Behdad Esfahbod * base consonants. 5962278eefcdb3dd0d492b9d07176fbecc1f0516bb7Behdad Esfahbod * 5972278eefcdb3dd0d492b9d07176fbecc1f0516bb7Behdad Esfahbod * Only do this for unforced Reph. (ie. not for Ra,H,ZWJ. */ 5982278eefcdb3dd0d492b9d07176fbecc1f0516bb7Behdad Esfahbod if (has_reph && base == start && start + 2 == limit) { 599617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod /* Have no other consonant, so Reph is not formed and Ra becomes base. */ 600617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod has_reph = false; 601617f4ac46f1084859d2034c08760e31e52d3bec3Behdad Esfahbod } 6025e4e21fce4b548b0b8a5951bc8f35a9f27428192Behdad Esfahbod } 6032278eefcdb3dd0d492b9d07176fbecc1f0516bb7Behdad Esfahbod 60434c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod if (base < end) 60534c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod info[base].indic_position() = POS_BASE_C; 6063d25079f8d6be81b9b4b91d3a97016b8a572f571Behdad Esfahbod 6073d25079f8d6be81b9b4b91d3a97016b8a572f571Behdad Esfahbod 608743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* 2. Decompose and reorder Matras: 609743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 610743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * Each matra and any syllable modifier sign in the cluster are moved to the 611743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * appropriate position relative to the consonant(s) in the cluster. The 612743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * shaping engine decomposes two- or three-part matras into their constituent 613743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * parts before any repositioning. Matra characters are classified by which 614743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * consonant in a conjunct they have affinity for and are reordered to the 615743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * following positions: 616743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 617743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o Before first half form in the syllable 618743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o After subjoined consonants 619743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o After post-form consonant 620743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * o After main consonant (for above marks) 621743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 622743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * IMPLEMENTATION NOTES: 623743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 624743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * The normalize() routine has already decomposed matras for us, so we don't 625743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * need to worry about that. 626743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod */ 627743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 628743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 629743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* 3. Reorder marks to canonical order: 630743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 631743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * Adjacent nukta and halant or nukta and vedic sign are always repositioned 632743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * if necessary, so that the nukta is first. 633743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 634743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * IMPLEMENTATION NOTES: 635743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * 636743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * We don't need to do this: the normalize() routine already did this for us. 637743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod */ 638743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 639743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 64045d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod /* Reorder characters */ 64145d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 6423c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = start; i < base; i++) 643900cf3d449bf36d4f8b1474590cae925fef48fc8Behdad Esfahbod info[i].indic_position() = MIN (POS_PRE_C, (indic_position_t) info[i].indic_position()); 64455f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod 645075d671f1093d2e3c58f7f45568696030f1b3efdBehdad Esfahbod if (base < end) 646075d671f1093d2e3c58f7f45568696030f1b3efdBehdad Esfahbod info[base].indic_position() = POS_BASE_C; 64745d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 64855f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod /* Mark final consonants. A final consonant is one appearing after a matra, 64955f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod * like in Khmer. */ 65055f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 65155f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod if (info[i].indic_category() == OT_M) { 65255f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod for (unsigned int j = i + 1; j < end; j++) 65355f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod if (is_consonant (info[j])) { 65455f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod info[j].indic_position() = POS_FINAL_C; 65555f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod break; 65655f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod } 65755f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod break; 65855f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod } 65955f70ebfb95083f515d9b0044a2a65ab11484bb5Behdad Esfahbod 660fd06bf56110e73826b3d5c73ac964e2609450d46Behdad Esfahbod /* Handle beginning Ra */ 6615e4e21fce4b548b0b8a5951bc8f35a9f27428192Behdad Esfahbod if (has_reph) 662dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod info[start].indic_position() = POS_RA_TO_BECOME_REPH; 663fd06bf56110e73826b3d5c73ac964e2609450d46Behdad Esfahbod 664f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod /* For old-style Indic script tags, move the first post-base Halant after 665f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod * last consonant. */ 666a3e04bee2c2fa648759a87e460db6b4f1b685586Behdad Esfahbod if (IS_OLD_INDIC_TAG (map->get_chosen_script (0))) { 6673c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 668f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod if (info[i].indic_category() == OT_H) { 669f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod unsigned int j; 670f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod for (j = end - 1; j > i; j--) 671190eb31a16178269aecaf5d2ecc9012f956749f4Behdad Esfahbod if (is_consonant (info[j])) 672f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod break; 673f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod if (j > i) { 674f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod /* Move Halant to after last consonant. */ 675f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod hb_glyph_info_t t = info[i]; 676f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod memmove (&info[i], &info[i + 1], (j - i) * sizeof (info[0])); 677f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod info[j] = t; 678f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod } 679f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod break; 680f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod } 681f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod } 682f5bc2725cb892264ba223e0a49f7fd2c622a0730Behdad Esfahbod 68381202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod /* Attach misc marks to previous char to move with them. */ 684ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod { 68581202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod indic_position_t last_pos = POS_START; 68681202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod for (unsigned int i = start; i < end; i++) 68781202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod { 68881202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod if ((FLAG (info[i].indic_category()) & (JOINER_FLAGS | FLAG (OT_N) | FLAG (OT_RS) | HALANT_OR_COENG_FLAGS))) 68981202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod { 69081202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod info[i].indic_position() = last_pos; 69181202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod if (unlikely (indic_options ().uniscribe_bug_compatible && 69281202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod info[i].indic_category() == OT_H && 69381202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod info[i].indic_position() == POS_PRE_M)) 69481202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod { 69581202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod /* 69681202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod * Uniscribe doesn't move the Halant with Left Matra. 69781202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod * TEST: U+092B,U+093F,U+094DE 69881202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod */ 699ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod for (unsigned int j = i; j > start; j--) 7006a091df9b403b147ef78f3974610dedf4ce1e08aBehdad Esfahbod if (info[j - 1].indic_position() != POS_PRE_M) { 701ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod info[i].indic_position() = info[j - 1].indic_position(); 702ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod break; 703ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod } 70481202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod } 70581202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod } else if (info[i].indic_position() != POS_SMVD) { 70681202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod last_pos = (indic_position_t) info[i].indic_position(); 707ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod } 70881202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod } 709ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod } 71074ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod /* Re-attach ZWJ, ZWNJ, and halant to next char, for after-base consonants. */ 71174ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod { 71274ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod unsigned int last_halant = end; 71374ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 714deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (is_halant_or_coeng (info[i])) 71574ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod last_halant = i; 71674ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod else if (is_consonant (info[i])) { 71774ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod for (unsigned int j = last_halant; j < i; j++) 71881202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod if (info[j].indic_position() != POS_SMVD) 71981202bd860e4034c18d9f80c5a4f33d9f48463a3Behdad Esfahbod info[j].indic_position() = info[i].indic_position(); 72074ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod } 72174ccc6a1322f8c48c5f2a05f04821783c4b87a14Behdad Esfahbod } 72245d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 723a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod { 7247b2a7dadd6c616bbfe1d8358700cab9cee88e584Behdad Esfahbod /* Things are out-of-control for post base positions, they may shuffle 7257b2a7dadd6c616bbfe1d8358700cab9cee88e584Behdad Esfahbod * around like crazy, so merge clusters. For pre-base stuff, we handle 7267b2a7dadd6c616bbfe1d8358700cab9cee88e584Behdad Esfahbod * cluster issues in final reordering. */ 7277b2a7dadd6c616bbfe1d8358700cab9cee88e584Behdad Esfahbod buffer->merge_clusters (base, end); 728a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod /* Sit tight, rock 'n roll! */ 729d3637edb248162970e202e9d0671540274192844Behdad Esfahbod hb_bubble_sort (info + start, end - start, compare_indic_order); 730a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod /* Find base again */ 731a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod base = end; 7323c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = start; i < end; i++) 733a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod if (info[i].indic_position() == POS_BASE_C) { 734a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod base = i; 735a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod break; 736a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod } 737a391ff50b9a7b6ac3e58d199ea726b20ee6839bbBehdad Esfahbod } 73845d6f29f15f1d2323bcaa2498aed23ff0c8a1567Behdad Esfahbod 739743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* Setup masks now */ 740743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 741281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod { 742281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod hb_mask_t mask; 743281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod 744dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod /* Reph */ 745668c6046c1b3af3bd316bda0cc8636f2a5e8df42Behdad Esfahbod for (unsigned int i = start; i < end && info[i].indic_position() == POS_RA_TO_BECOME_REPH; i++) 74670fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod info[i].mask |= basic_mask_array[RPHF]; 747dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 748281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod /* Pre-base */ 74920b68e699f73e6ce046c0ec143d40b3d6d48e06bBehdad Esfahbod mask = basic_mask_array[HALF]; 7503c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = start; i < base; i++) 751281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod info[i].mask |= mask; 752281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod /* Base */ 75320b68e699f73e6ce046c0ec143d40b3d6d48e06bBehdad Esfahbod mask = 0; 754075d671f1093d2e3c58f7f45568696030f1b3efdBehdad Esfahbod if (base < end) 755075d671f1093d2e3c58f7f45568696030f1b3efdBehdad Esfahbod info[base].mask |= mask; 756281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod /* Post-base */ 75720b68e699f73e6ce046c0ec143d40b3d6d48e06bBehdad Esfahbod mask = basic_mask_array[BLWF] | basic_mask_array[ABVF] | basic_mask_array[PSTF]; 7583c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 759281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod info[i].mask |= mask; 760281683995a46ed37aeeb84061249758c59822457Behdad Esfahbod } 7619da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod 76217d7de91d76406d3e92db37d9eef2fc615f06e68Behdad Esfahbod /* XXX This will not match for old-Indic spec since the Halant-Ra order is reversed already. */ 7635f0eaaad129ff04d56b8756bebf19fbc242718c9Behdad Esfahbod if (basic_mask_array[PREF] && base + 2 < end) 76417d7de91d76406d3e92db37d9eef2fc615f06e68Behdad Esfahbod { 765771a8f50289e8fa458cfc3cd84f73a380ce98077Behdad Esfahbod /* Find a Halant,Ra sequence and mark it for pre-base reordering processing. */ 7668e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod for (unsigned int i = base + 1; i + 1 < end; i++) 767deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (is_halant_or_coeng (info[i]) && 7688e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod info[i + 1].indic_category() == OT_Ra) 7698e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod { 7700201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod info[i++].mask |= basic_mask_array[PREF]; 7710201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod info[i++].mask |= basic_mask_array[PREF]; 7720201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod 7730201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod /* Mark the subsequent stuff with 'cfar'. Used in Khmer. 7740201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod * Read the feature spec. 7750201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod * This allows distinguishing the following cases with MS Khmer fonts: 7760201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod * U+1784,U+17D2,U+179A,U+17D2,U+1782 7770201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod * U+1784,U+17D2,U+1782,U+17D2,U+179A 7780201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod */ 7790201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod for (; i < end; i++) 7800201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod info[i].mask |= basic_mask_array[CFAR]; 7810201e0a4649ad5b607e50bcb9605e7a5b7143812Behdad Esfahbod 7828e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod break; 7838e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod } 78417d7de91d76406d3e92db37d9eef2fc615f06e68Behdad Esfahbod } 78517d7de91d76406d3e92db37d9eef2fc615f06e68Behdad Esfahbod 7869da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod /* Apply ZWJ/ZWNJ effects */ 7873c2ea9481b1028e927e615a5434ebf8edcb5f891Behdad Esfahbod for (unsigned int i = start + 1; i < end; i++) 7889da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod if (is_joiner (info[i])) { 7899da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod bool non_joiner = info[i].indic_category() == OT_ZWNJ; 7906b37bc80843e38ca7b62500f95fd70c08af68d62Behdad Esfahbod unsigned int j = i; 7919da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod 7929da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod do { 7939da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod j--; 7946b37bc80843e38ca7b62500f95fd70c08af68d62Behdad Esfahbod 79520b68e699f73e6ce046c0ec143d40b3d6d48e06bBehdad Esfahbod /* A ZWJ disables CJCT, however, it's mere presence is enough 79620b68e699f73e6ce046c0ec143d40b3d6d48e06bBehdad Esfahbod * to disable ligation. No explicit action needed. */ 79720b68e699f73e6ce046c0ec143d40b3d6d48e06bBehdad Esfahbod 79820b68e699f73e6ce046c0ec143d40b3d6d48e06bBehdad Esfahbod /* A ZWNJ disables HALF. */ 7996b37bc80843e38ca7b62500f95fd70c08af68d62Behdad Esfahbod if (non_joiner) 80070fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod info[j].mask &= ~basic_mask_array[HALF]; 8016b37bc80843e38ca7b62500f95fd70c08af68d62Behdad Esfahbod 8029da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod } while (j > start && !is_consonant (info[j])); 8039da0487cd452d780673e24329ce03e174a4ef83bBehdad Esfahbod } 804743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 805743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 806743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 807743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 8089f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbodinitial_reordering_vowel_syllable (const hb_ot_map_t *map, 8099f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod hb_buffer_t *buffer, 81070fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod hb_mask_t *basic_mask_array, 811ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int start, unsigned int end) 812743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 813c5306b6861cfaa50af40e8ceb058791fa06d7981Behdad Esfahbod /* We made the vowels look like consonants. So let's call the consonant logic! */ 81470fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod initial_reordering_consonant_syllable (map, buffer, basic_mask_array, start, end); 815743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 816743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 817743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 8189f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbodinitial_reordering_standalone_cluster (const hb_ot_map_t *map, 8199f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod hb_buffer_t *buffer, 82070fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod hb_mask_t *basic_mask_array, 821ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int start, unsigned int end) 822743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 82318c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod /* We treat NBSP/dotted-circle as if they are consonants, so we should just chain. 82418c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod * Only if not in compatibility mode that is... */ 82518c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod 826a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod if (indic_options ().uniscribe_bug_compatible) 82718c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod { 82818c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod /* For dotted-circle, this is what Uniscribe does: 82918c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod * If dotted-circle is the last glyph, it just does nothing. 83018c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod * Ie. It doesn't form Reph. */ 83118c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod if (buffer->info[end - 1].indic_category() == OT_DOTTEDCIRCLE) 83218c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod return; 83318c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod } 83418c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbod 83570fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod initial_reordering_consonant_syllable (map, buffer, basic_mask_array, start, end); 836743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 837743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 838743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 8399f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbodinitial_reordering_non_indic (const hb_ot_map_t *map HB_UNUSED, 8409f377ed3210fe7d9f15e0c4f82020556f9a8f6f0Behdad Esfahbod hb_buffer_t *buffer HB_UNUSED, 84170fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod hb_mask_t *basic_mask_array HB_UNUSED, 8423f18236a03880c0960f5990dc90685f6146951a6Behdad Esfahbod unsigned int start HB_UNUSED, unsigned int end HB_UNUSED) 843743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 844743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod /* Nothing to do right now. If we ever switch to using the output 845743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod * buffer in the reordering process, we'd need to next_glyph() here. */ 846743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 847743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 848743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod#include "hb-ot-shape-complex-indic-machine.hh" 849743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 850743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 851743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodinitial_reordering (const hb_ot_map_t *map, 8523f18236a03880c0960f5990dc90685f6146951a6Behdad Esfahbod hb_face_t *face HB_UNUSED, 853743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod hb_buffer_t *buffer, 854743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod void *user_data HB_UNUSED) 855743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 85670fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod hb_mask_t basic_mask_array[ARRAY_LENGTH (indic_basic_features)] = {0}; 857b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod unsigned int num_masks = ARRAY_LENGTH (indic_basic_features); 858b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod for (unsigned int i = 0; i < num_masks; i++) 85970fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod basic_mask_array[i] = map->get_1_mask (indic_basic_features[i].tag); 860743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 86170fe77bb9a25922bd34f206826d8731d901fb451Behdad Esfahbod find_syllables (map, buffer, basic_mask_array); 862b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod} 863b9ddbd55930228422e82b34a141ad1b6093f5376Behdad Esfahbod 864743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 86546e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbodfinal_reordering_syllable (hb_buffer_t *buffer, 86646e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod hb_mask_t init_mask, hb_mask_t pref_mask, 867ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int start, unsigned int end) 868743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod{ 8694ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod hb_glyph_info_t *info = buffer->info; 8704ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 871e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod /* 4. Final reordering: 872e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * 873e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * After the localized forms and basic shaping forms GSUB features have been 874e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * applied (see below), the shaping engine performs some final glyph 875e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * reordering before applying all the remaining font features to the entire 876e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * cluster. 8774ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod */ 8784ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 8794ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod /* Find base again */ 8805f0eaaad129ff04d56b8756bebf19fbc242718c9Behdad Esfahbod unsigned int base; 8815f0eaaad129ff04d56b8756bebf19fbc242718c9Behdad Esfahbod for (base = start; base < end; base++) 8825f0eaaad129ff04d56b8756bebf19fbc242718c9Behdad Esfahbod if (info[base].indic_position() >= POS_BASE_C) { 8835f0eaaad129ff04d56b8756bebf19fbc242718c9Behdad Esfahbod if (start < base && info[base].indic_position() > POS_BASE_C) 8845f0eaaad129ff04d56b8756bebf19fbc242718c9Behdad Esfahbod base--; 8855f0eaaad129ff04d56b8756bebf19fbc242718c9Behdad Esfahbod break; 8865f0eaaad129ff04d56b8756bebf19fbc242718c9Behdad Esfahbod } 8874ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 8884705a7026900e51f6430f03a73c87f2df035df92Behdad Esfahbod 8894ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod /* o Reorder matras: 890e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * 891e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * If a pre-base matra character had been reordered before applying basic 892e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * features, the glyph can be moved closer to the main consonant based on 893e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * whether half-forms had been formed. Actual position for the matra is 894e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * defined as “after last standalone halant glyph, after initial matra 895e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * position and before the main consonant”. If ZWJ or ZWNJ follow this 896e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * halant, position is moved after it. 8974ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod */ 8984ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 89965c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod if (start + 1 < end && start < base) /* Otherwise there can't be any pre-base matra characters. */ 9009d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod { 90165c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod /* If we lost track of base, alas, position before last thingy. */ 90265c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod unsigned int new_pos = base == end ? base - 2 : base - 1; 90365c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod 90465c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod /* Malayalam does not have "half" forms or explicit virama forms. 90565c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod * The glyphs formed by 'half' are Chillus. We want to position 90665c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod * matra after them all. 90765c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod */ 90865c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod if (buffer->props.script != HB_SCRIPT_MALAYALAM) 909e6b01a878cd2e63cb675e7e0c6ac4d83a8c10f37Behdad Esfahbod { 91065c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod while (new_pos > start && 91165c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod !(is_one_of (info[new_pos], (FLAG (OT_M) | FLAG (OT_H) | FLAG (OT_Coeng))))) 91265c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod new_pos--; 91365c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod 91465c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod /* If we found no Halant we are done. 91565c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod * Otherwise only proceed if the Halant does 91665c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod * not belong to the Matra itself! */ 91765c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod if (is_halant_or_coeng (info[new_pos]) && 91865c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod info[new_pos].indic_position() != POS_PRE_M) 91965c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod { 92065c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod /* -> If ZWJ or ZWNJ follow this halant, position is moved after it. */ 92165c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod if (new_pos + 1 < end && is_joiner (info[new_pos + 1])) 92265c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod new_pos++; 92365c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod } 92465c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod else 92565c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod new_pos = start; /* No move. */ 92665c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod } 9279d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod 92865c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod if (start < new_pos) 92965c43accdc4d2082282d5cedba8514b8df0c18a2Behdad Esfahbod { 9309d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod /* Now go see if there's actually any matras... */ 931921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod for (unsigned int i = new_pos; i > start; i--) 9326a091df9b403b147ef78f3974610dedf4ce1e08aBehdad Esfahbod if (info[i - 1].indic_position () == POS_PRE_M) 9339d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod { 9341a1dbe9a2787f226f3e43063da8eb6633438b0a0Behdad Esfahbod unsigned int old_pos = i - 1; 9351a1dbe9a2787f226f3e43063da8eb6633438b0a0Behdad Esfahbod hb_glyph_info_t tmp = info[old_pos]; 9361a1dbe9a2787f226f3e43063da8eb6633438b0a0Behdad Esfahbod memmove (&info[old_pos], &info[old_pos + 1], (new_pos - old_pos) * sizeof (info[0])); 9371a1dbe9a2787f226f3e43063da8eb6633438b0a0Behdad Esfahbod info[new_pos] = tmp; 938921ce5b17daf06af8e17989a3e335b9f5df20483Behdad Esfahbod new_pos--; 9399d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod } 9402cc933aff97916e5d0fe42883f40f0879f848e25Behdad Esfahbod buffer->merge_clusters (new_pos, MIN (end, base + 1)); 941abb3239ef92cc5dccb4638806d7ae9868b9ac9b3Behdad Esfahbod } else { 942e6b01a878cd2e63cb675e7e0c6ac4d83a8c10f37Behdad Esfahbod for (unsigned int i = start; i < base; i++) 943abb3239ef92cc5dccb4638806d7ae9868b9ac9b3Behdad Esfahbod if (info[i].indic_position () == POS_PRE_M) { 9442cc933aff97916e5d0fe42883f40f0879f848e25Behdad Esfahbod buffer->merge_clusters (i, MIN (end, base + 1)); 945abb3239ef92cc5dccb4638806d7ae9868b9ac9b3Behdad Esfahbod break; 946abb3239ef92cc5dccb4638806d7ae9868b9ac9b3Behdad Esfahbod } 9479d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod } 9484ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod } 9494ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 9504ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod 9514ac9e98d9d2ea973dd612dc4063cf78496c643a0Behdad Esfahbod /* o Reorder reph: 952e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * 953e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * Reph’s original position is always at the beginning of the syllable, 954e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * (i.e. it is not reordered at the character reordering stage). However, 955e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * it will be reordered according to the basic-forms shaping results. 956e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * Possible positions for reph, depending on the script, are; after main, 957e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * before post-base consonant forms, and after post-base consonant forms. 958dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod */ 959dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 960dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod /* If there's anything after the Ra that has the REPH pos, it ought to be halant. 961dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * Which means that the font has failed to ligate the Reph. In which case, we 962dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * shouldn't move. */ 963dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod if (start + 1 < end && 964dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod info[start].indic_position() == POS_RA_TO_BECOME_REPH && 965dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod info[start + 1].indic_position() != POS_RA_TO_BECOME_REPH) 966dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod { 96702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod unsigned int new_reph_pos; 96802b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 96902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod enum reph_position_t { 970f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod REPH_AFTER_MAIN, 971f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod REPH_BEFORE_SUBSCRIPT, 972f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod REPH_AFTER_SUBSCRIPT, 973f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod REPH_BEFORE_POSTSCRIPT, 9749fc7a11469113d31d8095757c4fc038c3427d44aBehdad Esfahbod REPH_AFTER_POSTSCRIPT 975f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod } reph_pos; 976f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 977f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod /* XXX Figure out old behavior too */ 9787f852b644b8143492a02edfc853114aaa23446bdBehdad Esfahbod switch ((hb_tag_t) buffer->props.script) 979f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod { 980f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_MALAYALAM: 981f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_ORIYA: 98234c215036f5fcdc7599b1ab0591b56dbb3811902Behdad Esfahbod case HB_SCRIPT_SINHALA: 983f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_AFTER_MAIN; 984f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 985f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 986f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_GURMUKHI: 987f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_BEFORE_SUBSCRIPT; 988f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 989f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 990f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_BENGALI: 991f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_AFTER_SUBSCRIPT; 992f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 993f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 994f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod default: 995f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_DEVANAGARI: 996f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_GUJARATI: 997f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_BEFORE_POSTSCRIPT; 998f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 999f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod 1000f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_KANNADA: 1001f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_TAMIL: 1002f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod case HB_SCRIPT_TELUGU: 1003f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod reph_pos = REPH_AFTER_POSTSCRIPT; 1004f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod break; 1005f89367251109af235f4f0446c13c261a5a4a6f72Behdad Esfahbod } 100602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 1007dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod /* 1. If reph should be positioned after post-base consonant forms, 1008dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * proceed to step 5. 100902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 10109d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod if (reph_pos == REPH_AFTER_POSTSCRIPT) 101102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 10129d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod goto reph_step_5; 101302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 101402b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 101502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 2. If the reph repositioning class is not after post-base: target 1016dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * position is after the first explicit halant glyph between the 1017dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * first post-reph consonant and last main consonant. If ZWJ or ZWNJ 1018dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * are following this halant, position is moved after it. If such 1019dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * position is found, this is the target position. Otherwise, 1020dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * proceed to the next step. 1021dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * 1022dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * Note: in old-implementation fonts, where classifications were 1023dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * fixed in shaping engine, there was no case where reph position 1024dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * will be found on this step. 102502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 102602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 102702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos = start + 1; 1028deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod while (new_reph_pos < base && !is_halant_or_coeng (info[new_reph_pos])) 102902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos++; 103002b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 1031deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (new_reph_pos < base && is_halant_or_coeng (info[new_reph_pos])) { 103202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* ->If ZWJ or ZWNJ are following this halant, position is moved after it. */ 103302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod if (new_reph_pos + 1 < base && is_joiner (info[new_reph_pos + 1])) 103402b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos++; 103502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod goto reph_move; 103602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 103702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 103802b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 103902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 3. If reph should be repositioned after the main consonant: find the 1040dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * first consonant not ligated with main, or find the first 1041dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * consonant that is not a potential pre-base reordering Ra. 104202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 10439d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod if (reph_pos == REPH_AFTER_MAIN) 104402b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 1045b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod new_reph_pos = base; 1046b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod /* XXX Skip potential pre-base reordering Ra. */ 104734ae336f3fae93ef9372881d545c817bce383041Behdad Esfahbod while (new_reph_pos + 1 < end && info[new_reph_pos + 1].indic_position() <= POS_AFTER_MAIN) 1048b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod new_reph_pos++; 1049b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod if (new_reph_pos < end) 1050b504e060f008e95b1ba36c06600c9fea4f5d4808Behdad Esfahbod goto reph_move; 105102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 105202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 105302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 4. If reph should be positioned before post-base consonant, find 1054dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * first post-base classified consonant not ligated with main. If no 1055dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * consonant is found, the target position should be before the 1056dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * first matra, syllable modifier sign or vedic sign. 105702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 10589d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod /* This is our take on what step 4 is trying to say (and failing, BADLY). */ 10599d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod if (reph_pos == REPH_AFTER_SUBSCRIPT) 106002b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 10619d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod new_reph_pos = base; 10629d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod while (new_reph_pos < end && 1063be8b9f5f715f6fb36b98bd33c3303f79cc068f8aBehdad Esfahbod !( FLAG (info[new_reph_pos + 1].indic_position()) & (FLAG (POS_POST_C) | FLAG (POS_AFTER_POST) | FLAG (POS_SMVD)))) 10649d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod new_reph_pos++; 10659d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod if (new_reph_pos < end) 10669d0d319a4a7e85d922e58fade0f40caae1c9f109Behdad Esfahbod goto reph_move; 106702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 106802b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 106902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 5. If no consonant is found in steps 3 or 4, move reph to a position 1070dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * immediately before the first post-base matra, syllable modifier 1071dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * sign or vedic sign that has a reordering class after the intended 1072dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * reph position. For example, if the reordering position for reph 1073dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * is post-main, it will skip above-base matras that also have a 1074dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod * post-main position. 1075dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod */ 107602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod reph_step_5: 107702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 1078d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod /* Copied from step 2. */ 1079d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod new_reph_pos = start + 1; 1080d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod while (new_reph_pos < base && !is_halant_or_coeng (info[new_reph_pos])) 1081d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod new_reph_pos++; 1082d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod 1083d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod if (new_reph_pos < base && is_halant_or_coeng (info[new_reph_pos])) { 1084d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod /* ->If ZWJ or ZWNJ are following this halant, position is moved after it. */ 1085d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod if (new_reph_pos + 1 < base && is_joiner (info[new_reph_pos + 1])) 1086d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod new_reph_pos++; 1087d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod goto reph_move; 1088d0e68dbd0b9fc9a42c4280d01c8ffd9c5015d550Behdad Esfahbod } 108902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 1090dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 109102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* 6. Otherwise, reorder reph to the end of the syllable. 109202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod */ 109302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 109402b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos = end - 1; 109502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod while (new_reph_pos > start && info[new_reph_pos].indic_position() == POS_SMVD) 109602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos--; 109702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod 1098892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod /* 1099892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * If the Reph is to be ending up after a Matra,Halant sequence, 1100892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * position it before that Halant so it can interact with the Matra. 1101892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * However, if it's a plain Consonant,Halant we shouldn't do that. 1102892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * Uniscribe doesn't do this. 1103892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod * TEST: U+0930,U+094D,U+0915,U+094B,U+094D 1104892eb7878238d810a2a70f9dadbf958207bfeaa1Behdad Esfahbod */ 1105a2b471df821b32625d127f83b2f90e6d6a967e7eBehdad Esfahbod if (!indic_options ().uniscribe_bug_compatible && 1106deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod unlikely (is_halant_or_coeng (info[new_reph_pos]))) { 110702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod for (unsigned int i = base + 1; i < new_reph_pos; i++) 110802b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod if (info[i].indic_category() == OT_M) { 110902b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* Ok, got it. */ 111002b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod new_reph_pos--; 111102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 111202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 111302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod goto reph_move; 11148df5636968389ac7bf8620ccd091fd4872b0bbeeBehdad Esfahbod } 11158df5636968389ac7bf8620ccd091fd4872b0bbeeBehdad Esfahbod 111602b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod reph_move: 111702b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod { 1118e6b01a878cd2e63cb675e7e0c6ac4d83a8c10f37Behdad Esfahbod /* Yay, one big cluster! Merge before moving. */ 1119e6b01a878cd2e63cb675e7e0c6ac4d83a8c10f37Behdad Esfahbod buffer->merge_clusters (start, end); 1120e6b01a878cd2e63cb675e7e0c6ac4d83a8c10f37Behdad Esfahbod 112102b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod /* Move */ 112202b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod hb_glyph_info_t reph = info[start]; 112302b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod memmove (&info[start], &info[start + 1], (new_reph_pos - start) * sizeof (info[0])); 112402b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod info[new_reph_pos] = reph; 112502b2922fbf098c8282eb23dc2c54d5829cf67024Behdad Esfahbod } 1126dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod } 1127dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 1128dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod 1129dbb105883c6e9b83e78dc8b10766cd56b98cd7e1Behdad Esfahbod /* o Reorder pre-base reordering consonants: 1130e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * 1131e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * If a pre-base reordering consonant is found, reorder it according to 1132e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod * the following rules: 1133e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod */ 1134e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod 113546e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod if (pref_mask && base + 1 < end) /* Otherwise there can't be any pre-base reordering Ra. */ 113646e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod { 11378e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod for (unsigned int i = base + 1; i < end; i++) 11388e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod if ((info[i].mask & pref_mask) != 0) 113978818124b17691ec2c647142fdb9ae743aa03deeBehdad Esfahbod { 11408e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod /* 1. Only reorder a glyph produced by substitution during application 11418e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * of the <pref> feature. (Note that a font may shape a Ra consonant with 11428e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * the feature generally but block it in certain contexts.) 11438e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod */ 11448e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod if (i + 1 == end || (info[i + 1].mask & pref_mask) == 0) 11458e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod { 11468e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod /* 11478e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * 2. Try to find a target position the same way as for pre-base matra. 11488e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * If it is found, reorder pre-base consonant glyph. 11498e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * 11508e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * 3. If position is not found, reorder immediately before main 11518e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod * consonant. 11528e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod */ 11538e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod 11548e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod unsigned int new_pos = base; 11550afb84c12567ac35adac657bf8be29999b8c5a50Behdad Esfahbod while (new_pos > start && 11560afb84c12567ac35adac657bf8be29999b8c5a50Behdad Esfahbod !(is_one_of (info[new_pos - 1], FLAG(OT_M) | HALANT_OR_COENG_FLAGS))) 11578e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod new_pos--; 11588e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod 1159d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod /* In Khmer coeng model, a V,Ra can go *after* matras. If it goes after a 1160d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod * split matra, it should be reordered to *before* the left part of such matra. */ 1161d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod if (new_pos > start && info[new_pos - 1].indic_category() == OT_M) 1162d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod { 1163d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod unsigned int old_pos = i; 1164d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod for (unsigned int i = base + 1; i < old_pos; i++) 1165d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod if (info[i].indic_category() == OT_M) 1166d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod { 1167d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod new_pos--; 1168d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod break; 1169d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod } 1170d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod } 1171d90b8e841e0068a601c96ab184d18b0f48eec9d1Behdad Esfahbod 1172deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad Esfahbod if (new_pos > start && is_halant_or_coeng (info[new_pos - 1])) 11738e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod /* -> If ZWJ or ZWNJ follow this halant, position is moved after it. */ 11748e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod if (new_pos < end && is_joiner (info[new_pos])) 11758e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod new_pos++; 11768e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod 11778e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod { 11788e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod unsigned int old_pos = i; 1179e6b01a878cd2e63cb675e7e0c6ac4d83a8c10f37Behdad Esfahbod buffer->merge_clusters (new_pos, old_pos + 1); 11808e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod hb_glyph_info_t tmp = info[old_pos]; 11818e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod memmove (&info[new_pos + 1], &info[new_pos], (old_pos - new_pos) * sizeof (info[0])); 11828e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod info[new_pos] = tmp; 11838e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod } 11848e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod } 11858e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod 11868e7b5882fb4c1921c9d030d354a9b998115cdb8cBehdad Esfahbod break; 118778818124b17691ec2c647142fdb9ae743aa03deeBehdad Esfahbod } 118846e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod } 1189eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 1190eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 1191a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod /* Apply 'init' to the Left Matra if it's a word start. */ 11926a091df9b403b147ef78f3974610dedf4ce1e08aBehdad Esfahbod if (info[start].indic_position () == POS_PRE_M && 1193a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod (!start || 1194eace47b173807d94b29a6490d0bc3c9f8f6168d1Behdad Esfahbod !(FLAG (_hb_glyph_info_get_general_category (&info[start - 1])) & 11952c372b80f6befad69e216e3f218b38640b8cc044Behdad Esfahbod FLAG_RANGE (HB_UNICODE_GENERAL_CATEGORY_FORMAT, HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)))) 119646e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod info[start].mask |= init_mask; 1197a913b024d84973556094fd64ce5f0b7106fcc3b5Behdad Esfahbod 1198eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 11998ed248de77e5d2ed978e55c0ce1a11727bc9e34cBehdad Esfahbod /* 12008ed248de77e5d2ed978e55c0ce1a11727bc9e34cBehdad Esfahbod * Finish off the clusters and go home! 12018ed248de77e5d2ed978e55c0ce1a11727bc9e34cBehdad Esfahbod */ 1202decf6ffca475fe01ff3151b7641f629f031137d2Behdad Esfahbod if (indic_options ().uniscribe_bug_compatible) 1203ebe29733d44fe0fa9fb30f946ab0dd7a40336a24Behdad Esfahbod { 120430c3d5e9fc61b49c2c6ad4e744300edd6f3e0261Behdad Esfahbod /* Uniscribe merges the entire cluster. 120521d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod * This means, half forms are submerged into the main consonants cluster. 120621d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod * This is unnecessary, and makes cursor positioning harder, but that's what 120721d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod * Uniscribe does. */ 1208e6b01a878cd2e63cb675e7e0c6ac4d83a8c10f37Behdad Esfahbod buffer->merge_clusters (start, end); 120921d2803133c2c424ed37a9f3d17c7fc4963e5a60Behdad Esfahbod } 1210ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod} 1211e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod 1212e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod 1213ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbodstatic void 1214ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbodfinal_reordering (const hb_ot_map_t *map, 12153f18236a03880c0960f5990dc90685f6146951a6Behdad Esfahbod hb_face_t *face HB_UNUSED, 1216ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod hb_buffer_t *buffer, 1217ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod void *user_data HB_UNUSED) 1218ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod{ 1219ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int count = buffer->len; 1220ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod if (!count) return; 1221ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod 122246e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod hb_mask_t init_mask = map->get_1_mask (HB_TAG('i','n','i','t')); 122346e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod hb_mask_t pref_mask = map->get_1_mask (HB_TAG('p','r','e','f')); 1224eed903b1644e087178438959664a6a57bebc398bBehdad Esfahbod 1225ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod hb_glyph_info_t *info = buffer->info; 1226ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod unsigned int last = 0; 1227cee7187447b76b22e1bb6136d137b35ac49c3a5dBehdad Esfahbod unsigned int last_syllable = info[0].syllable(); 1228ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod for (unsigned int i = 1; i < count; i++) 1229cee7187447b76b22e1bb6136d137b35ac49c3a5dBehdad Esfahbod if (last_syllable != info[i].syllable()) { 123046e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod final_reordering_syllable (buffer, init_mask, pref_mask, last, i); 1231ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod last = i; 1232cee7187447b76b22e1bb6136d137b35ac49c3a5dBehdad Esfahbod last_syllable = info[last].syllable(); 1233ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod } 123446e645ec4b59f0a278347be11f40c7df700d5bb6Behdad Esfahbod final_reordering_syllable (buffer, init_mask, pref_mask, last, count); 1235e7be05702447ae270d797398132c1930cd3a9b86Behdad Esfahbod 1236743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod HB_BUFFER_DEALLOCATE_VAR (buffer, indic_category); 1237743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod HB_BUFFER_DEALLOCATE_VAR (buffer, indic_position); 1238743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod} 1239743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 1240743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbod 1241693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbodconst hb_ot_complex_shaper_t _hb_ot_complex_shaper_indic = 1242693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod{ 1243693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod "indic", 1244693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod collect_features_indic, 1245693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod override_features_indic, 1246693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod NULL, /* normalization_preference */ 1247693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod setup_masks_indic, 12481e7d860613032e40a3f90e2caa2ee5ac44ab8c8cBehdad Esfahbod false, /* zero_width_attached_marks */ 1249693918ef8541014a5ef7dfb91c6ea0ae36d9c368Behdad Esfahbod}; 1250