hb-ot-shape-complex-indic-machine.rl revision 25bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2
1867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod/* 227aba594c90b4444c35273a38f5fedc8e09d9a88Behdad Esfahbod * Copyright © 2011,2012 Google, Inc. 3867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * 4867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * This is part of HarfBuzz, a text shaping library. 5867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * 6867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * Permission is hereby granted, without written agreement and without 7867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * license or royalty fees, to use, copy, modify, and distribute this 8867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * software and its documentation for any purpose, provided that the 9867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * above copyright notice and the following two paragraphs appear in 10867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * all copies of this software. 11867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * 12867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * DAMAGE. 17867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * 18867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * 24867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod * Google Author(s): Behdad Esfahbod 25867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod */ 26867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 27867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod#ifndef HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH 28867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod#define HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH 29867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 30867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod#include "hb-private.hh" 31867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 32867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod%%{ 33867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod machine indic_syllable_machine; 34867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod alphtype unsigned char; 35867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod write data; 36867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod}%% 37867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 38867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod%%{ 39867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 40c7fe56a1d5d3e969b6ec51cd9ecd471706a19568Behdad Esfahbod# Same order as enum indic_category_t. Not sure how to avoid duplication. 41867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodX = 0; 42867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodC = 1; 43867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodRa = 2; 44867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodV = 3; 45867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodN = 4; 46867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodH = 5; 47867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodZWNJ = 6; 48867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodZWJ = 7; 49867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodM = 8; 50867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodSM = 9; 51867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodVD = 10; 52867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodA = 11; 53867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad EsfahbodNBSP = 12; 5418c06e189bd078affbb84c3bb5bb80687a227c5eBehdad EsfahbodDOTTEDCIRCLE = 13; 557d09c98a1fff97127e48eae48d380dc9fcff288eBehdad EsfahbodRS = 14; 56deb521dee4fdca8c2124cfb39a205e6269d4a70dBehdad EsfahbodCoeng = 15; 57867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 5825bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbodc = C | Ra; # is_consonant 5925bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbodn = (N.N? | ZWNJ?.RS); # is_consonant_modifier 6025bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbodz = ZWJ|ZWNJ; # is_joiner 6125bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbodh = H | Coeng; # is_halant_or_coeng 6225bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbodmatra_group = M.N?.H?; 6325bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbodsyllable_tail = SM? (Coeng (c|V))? (VD VD?)?; 6418c06e189bd078affbb84c3bb5bb80687a227c5eBehdad Esfahbodplace_holder = NBSP | DOTTEDCIRCLE; 65867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 66867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 6725bc489498ef7d0beb8fe9ab663e3f0b2f52c9c2Behdad Esfahbodconsonant_syllable = (c.n? (h.z?|z.h))* c.n? A? (h.z? | matra_group*)? syllable_tail; 6811e2a601b19861b05dbb2051d2d078c3cfd75b29Behdad Esfahbodvowel_syllable = (Ra H)? V.n? (z?.h.c | ZWJ.c)* matra_group* syllable_tail; 6911e2a601b19861b05dbb2051d2d078c3cfd75b29Behdad Esfahbodstandalone_cluster = (Ra H)? place_holder.n? (z? h c)* matra_group* syllable_tail; 704be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbodother = any; 71867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 724be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbodmain := |* 734be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod consonant_syllable => { process_syllable (consonant_syllable); }; 744be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod vowel_syllable => { process_syllable (vowel_syllable); }; 754be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod standalone_cluster => { process_syllable (standalone_cluster); }; 764be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod other => { process_syllable (non_indic); }; 774be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod*|; 78867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 79867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 80867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod}%% 81867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 824be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod#define process_syllable(func) \ 834be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod HB_STMT_START { \ 849c09928989316e2befe00d52ed66e055637ccd36Behdad Esfahbod /* fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #func); */ \ 854be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod for (unsigned int i = last; i < p+1; i++) \ 864be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod info[i].syllable() = syllable_serial; \ 874be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod PASTE (initial_reordering_, func) (map, buffer, mask_array, last, p+1); \ 884be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod last = p+1; \ 894be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod syllable_serial++; \ 90ff24d1081af08a887895975285d7e38f5d07bc37Behdad Esfahbod if (unlikely (!syllable_serial)) syllable_serial++; \ 914be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod } HB_STMT_END 92867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 93743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodstatic void 94743807a3ce1b2229e5307a8aea074a7544623d8dBehdad Esfahbodfind_syllables (const hb_ot_map_t *map, hb_buffer_t *buffer, hb_mask_t *mask_array) 95867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod{ 964be46bade26faf13f7b4d447e9cc608e183955dcBehdad Esfahbod unsigned int p, pe, eof, ts, te, act; 97867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod int cs; 98ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod hb_glyph_info_t *info = buffer->info; 99867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod %%{ 100867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod write init; 101ef24cc8c8e2478a6352c340f4611a617646de4ccBehdad Esfahbod getkey info[p].indic_category(); 102867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod }%% 103867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 104867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod p = 0; 10576f76812ac7cca8ac6935952a2360d5e151480faBehdad Esfahbod pe = eof = buffer->len; 106867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 107d69d5ceaa0ad30e8d4b9783507c59c6d4221de4fBehdad Esfahbod unsigned int last = 0; 108ff24d1081af08a887895975285d7e38f5d07bc37Behdad Esfahbod uint8_t syllable_serial = 1; 109867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod %%{ 110867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod write exec; 111867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod }%% 112867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod} 113867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod 114867361c3ad39629a8d5b7dc48d558a1c19e37d43Behdad Esfahbod#endif /* HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH */ 115