1/* 2 * Copyright © 2015 Mozilla Foundation. 3 * Copyright © 2015 Google, Inc. 4 * 5 * This is part of HarfBuzz, a text shaping library. 6 * 7 * Permission is hereby granted, without written agreement and without 8 * license or royalty fees, to use, copy, modify, and distribute this 9 * software and its documentation for any purpose, provided that the 10 * above copyright notice and the following two paragraphs appear in 11 * all copies of this software. 12 * 13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 17 * DAMAGE. 18 * 19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 24 * 25 * Mozilla Author(s): Jonathan Kew 26 * Google Author(s): Behdad Esfahbod 27 */ 28 29#ifndef HB_OT_SHAPE_COMPLEX_USE_MACHINE_HH 30#define HB_OT_SHAPE_COMPLEX_USE_MACHINE_HH 31 32#include "hb-private.hh" 33 34%%{ 35 machine use_syllable_machine; 36 alphtype unsigned char; 37 write data; 38}%% 39 40%%{ 41 42# Same order as enum use_category_t. Not sure how to avoid duplication. 43 44O = 0; # OTHER 45 46B = 1; # BASE 47IND = 3; # BASE_IND 48N = 4; # BASE_NUM 49GB = 5; # BASE_OTHER 50CGJ = 6; # CGJ 51#F = 7; # CONS_FINAL 52FM = 8; # CONS_FINAL_MOD 53#M = 9; # CONS_MED 54#CM = 10; # CONS_MOD 55SUB = 11; # CONS_SUB 56H = 12; # HALANT 57 58HN = 13; # HALANT_NUM 59ZWNJ = 14; # Zero width non-joiner 60ZWJ = 15; # Zero width joiner 61WJ = 16; # Word joiner 62Rsv = 17; # Reserved characters 63R = 18; # REPHA 64S = 19; # SYM 65#SM = 20; # SYM_MOD 66VS = 21; # VARIATION_SELECTOR 67#V = 36; # VOWEL 68#VM = 40; # VOWEL_MOD 69 70FAbv = 24; # CONS_FINAL_ABOVE 71FBlw = 25; # CONS_FINAL_BELOW 72FPst = 26; # CONS_FINAL_POST 73MAbv = 27; # CONS_MED_ABOVE 74MBlw = 28; # CONS_MED_BELOW 75MPst = 29; # CONS_MED_POST 76MPre = 30; # CONS_MED_PRE 77CMAbv = 31; # CONS_MOD_ABOVE 78CMBlw = 32; # CONS_MOD_BELOW 79VAbv = 33; # VOWEL_ABOVE / VOWEL_ABOVE_BELOW / VOWEL_ABOVE_BELOW_POST / VOWEL_ABOVE_POST 80VBlw = 34; # VOWEL_BELOW / VOWEL_BELOW_POST 81VPst = 35; # VOWEL_POST UIPC = Right 82VPre = 22; # VOWEL_PRE / VOWEL_PRE_ABOVE / VOWEL_PRE_ABOVE_POST / VOWEL_PRE_POST 83VMAbv = 37; # VOWEL_MOD_ABOVE 84VMBlw = 38; # VOWEL_MOD_BELOW 85VMPst = 39; # VOWEL_MOD_POST 86VMPre = 23; # VOWEL_MOD_PRE 87SMAbv = 41; # SYM_MOD_ABOVE 88SMBlw = 42; # SYM_MOD_BELOW 89CS = 43; # CONS_WITH_STACKER 90 91 92# Override: Adjoc ZWJ placement. https://github.com/harfbuzz/harfbuzz/issues/542#issuecomment-353169729 93consonant_modifiers = CMAbv* CMBlw* ((ZWJ?.H.ZWJ? B | SUB) VS? CMAbv? CMBlw*)*; 94# Override: Allow two MBlw. https://github.com/harfbuzz/harfbuzz/issues/376 95medial_consonants = MPre? MAbv? MBlw?.MBlw? MPst?; 96dependent_vowels = VPre* VAbv* VBlw* VPst*; 97vowel_modifiers = VMPre* VMAbv* VMBlw* VMPst*; 98final_consonants = FAbv* FBlw* FPst* FM?; 99 100virama_terminated_cluster = 101 (R|CS)? (B | GB) VS? 102 consonant_modifiers 103 ZWJ?.H.ZWJ? 104; 105standard_cluster = 106 (R|CS)? (B | GB) VS? 107 consonant_modifiers 108 medial_consonants 109 dependent_vowels 110 vowel_modifiers 111 final_consonants 112; 113 114broken_cluster = 115 R? 116 consonant_modifiers 117 medial_consonants 118 dependent_vowels 119 vowel_modifiers 120 final_consonants 121; 122 123number_joiner_terminated_cluster = N VS? (HN N VS?)* HN; 124numeral_cluster = N VS? (HN N VS?)*; 125symbol_cluster = S VS? SMAbv* SMBlw*; 126independent_cluster = (IND | O | Rsv | WJ) VS?; 127other = any; 128 129main := |* 130 independent_cluster => { found_syllable (independent_cluster); }; 131 virama_terminated_cluster => { found_syllable (virama_terminated_cluster); }; 132 standard_cluster => { found_syllable (standard_cluster); }; 133 number_joiner_terminated_cluster => { found_syllable (number_joiner_terminated_cluster); }; 134 numeral_cluster => { found_syllable (numeral_cluster); }; 135 symbol_cluster => { found_syllable (symbol_cluster); }; 136 broken_cluster => { found_syllable (broken_cluster); }; 137 other => { found_syllable (non_cluster); }; 138*|; 139 140 141}%% 142 143#define found_syllable(syllable_type) \ 144 HB_STMT_START { \ 145 if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \ 146 for (unsigned int i = last; i < p+1; i++) \ 147 info[i].syllable() = (syllable_serial << 4) | syllable_type; \ 148 last = p+1; \ 149 syllable_serial++; \ 150 if (unlikely (syllable_serial == 16)) syllable_serial = 1; \ 151 } HB_STMT_END 152 153static void 154find_syllables (hb_buffer_t *buffer) 155{ 156 unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED; 157 int cs; 158 hb_glyph_info_t *info = buffer->info; 159 %%{ 160 write init; 161 getkey info[p].use_category(); 162 }%% 163 164 p = 0; 165 pe = eof = buffer->len; 166 167 unsigned int last = 0; 168 unsigned int syllable_serial = 1; 169 %%{ 170 write exec; 171 }%% 172} 173 174#undef found_syllable 175 176#endif /* HB_OT_SHAPE_COMPLEX_USE_MACHINE_HH */ 177