| /* |
| * Copyright © 2011,2012 Google, Inc. |
| * |
| * This is part of HarfBuzz, a text shaping library. |
| * |
| * Permission is hereby granted, without written agreement and without |
| * license or royalty fees, to use, copy, modify, and distribute this |
| * software and its documentation for any purpose, provided that the |
| * above copyright notice and the following two paragraphs appear in |
| * all copies of this software. |
| * |
| * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| * |
| * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| * |
| * Google Author(s): Behdad Esfahbod |
| */ |
| |
| #ifndef HB_OT_SHAPER_MYANMAR_MACHINE_HH |
| #define HB_OT_SHAPER_MYANMAR_MACHINE_HH |
| |
| #include "hb.hh" |
| |
| #include "hb-ot-layout.hh" |
| #include "hb-ot-shaper-indic.hh" |
| |
| /* buffer var allocations */ |
| #define myanmar_category() ot_shaper_var_u8_category() /* myanmar_category_t */ |
| #define myanmar_position() ot_shaper_var_u8_auxiliary() /* myanmar_position_t */ |
| |
| using myanmar_category_t = unsigned; |
| using myanmar_position_t = ot_position_t; |
| |
| #define M_Cat(Cat) myanmar_syllable_machine_ex_##Cat |
| |
| enum myanmar_syllable_type_t { |
| myanmar_consonant_syllable, |
| myanmar_broken_cluster, |
| myanmar_non_myanmar_cluster, |
| }; |
| |
| %%{ |
| machine myanmar_syllable_machine; |
| alphtype unsigned char; |
| write exports; |
| write data; |
| }%% |
| |
| %%{ |
| |
| |
| # Spec category D is folded into GB; D0 is not implemented by Uniscribe and as such folded into D |
| # Spec category P is folded into GB |
| |
| export C = 1; |
| export IV = 2; |
| export DB = 3; # Dot below = OT_N |
| export H = 4; |
| export ZWNJ = 5; |
| export ZWJ = 6; |
| export SM = 8; # Visarga and Shan tones |
| export GB = 10; # = OT_PLACEHOLDER |
| export DOTTEDCIRCLE = 11; |
| export A = 9; |
| export Ra = 15; |
| export CS = 18; |
| |
| export VAbv = 20; |
| export VBlw = 21; |
| export VPre = 22; |
| export VPst = 23; |
| |
| # 32+ are for Myanmar-specific values |
| export As = 32; # Asat |
| export MH = 35; # Medial Ha |
| export MR = 36; # Medial Ra |
| export MW = 37; # Medial Wa, Shan Wa |
| export MY = 38; # Medial Ya, Mon Na, Mon Ma |
| export PT = 39; # Pwo and other tones |
| export VS = 40; # Variation selectors |
| export ML = 41; # Medial Mon La |
| |
| |
| j = ZWJ|ZWNJ; # Joiners |
| k = (Ra As H); # Kinzi |
| |
| c = C|Ra; # is_consonant |
| |
| medial_group = MY? As? MR? ((MW MH? ML? | MH ML? | ML) As?)?; |
| main_vowel_group = (VPre.VS?)* VAbv* VBlw* A* (DB As?)?; |
| post_vowel_group = VPst MH? ML? As* VAbv* A* (DB As?)?; |
| pwo_tone_group = PT A* DB? As?; |
| |
| complex_syllable_tail = As* medial_group main_vowel_group post_vowel_group* pwo_tone_group* SM* j?; |
| syllable_tail = (H (c|IV).VS?)* (H | complex_syllable_tail); |
| |
| consonant_syllable = (k|CS)? (c|IV|GB|DOTTEDCIRCLE).VS? syllable_tail; |
| broken_cluster = k? VS? syllable_tail; |
| other = any; |
| |
| main := |* |
| consonant_syllable => { found_syllable (myanmar_consonant_syllable); }; |
| j => { found_syllable (myanmar_non_myanmar_cluster); }; |
| broken_cluster => { found_syllable (myanmar_broken_cluster); buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_BROKEN_SYLLABLE; }; |
| other => { found_syllable (myanmar_non_myanmar_cluster); }; |
| *|; |
| |
| |
| }%% |
| |
| #define found_syllable(syllable_type) \ |
| HB_STMT_START { \ |
| if (0) fprintf (stderr, "syllable %d..%d %s\n", ts, te, #syllable_type); \ |
| for (unsigned int i = ts; i < te; i++) \ |
| info[i].syllable() = (syllable_serial << 4) | syllable_type; \ |
| syllable_serial++; \ |
| if (unlikely (syllable_serial == 16)) syllable_serial = 1; \ |
| } HB_STMT_END |
| |
| inline void |
| find_syllables_myanmar (hb_buffer_t *buffer) |
| { |
| unsigned int p, pe, eof, ts, te, act HB_UNUSED; |
| int cs; |
| hb_glyph_info_t *info = buffer->info; |
| %%{ |
| write init; |
| getkey info[p].myanmar_category(); |
| }%% |
| |
| p = 0; |
| pe = eof = buffer->len; |
| |
| unsigned int syllable_serial = 1; |
| %%{ |
| write exec; |
| }%% |
| } |
| |
| #undef found_syllable |
| |
| #endif /* HB_OT_SHAPER_MYANMAR_MACHINE_HH */ |