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Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use-machine.rl')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use-machine.rl | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use-machine.rl b/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use-machine.rl new file mode 100644 index 0000000000..9b75b5c6e2 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use-machine.rl @@ -0,0 +1,195 @@ +/* + * Copyright © 2015 Mozilla Foundation. + * Copyright © 2015 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. + * + * Mozilla Author(s): Jonathan Kew + * Google Author(s): Behdad Esfahbod + */ + +#ifndef HB_OT_SHAPE_COMPLEX_USE_MACHINE_HH +#define HB_OT_SHAPE_COMPLEX_USE_MACHINE_HH + +#include "hb.hh" + +%%{ + machine use_syllable_machine; + alphtype unsigned char; + write data; +}%% + +%%{ + +# Same order as enum use_category_t. Not sure how to avoid duplication. + +O = 0; # OTHER + +B = 1; # BASE +IND = 3; # BASE_IND +N = 4; # BASE_NUM +GB = 5; # BASE_OTHER +CGJ = 6; # CGJ +#F = 7; # CONS_FINAL +#FM = 8; # CONS_FINAL_MOD +#M = 9; # CONS_MED +#CM = 10; # CONS_MOD +SUB = 11; # CONS_SUB +H = 12; # HALANT + +HN = 13; # HALANT_NUM +ZWNJ = 14; # Zero width non-joiner +ZWJ = 15; # Zero width joiner +WJ = 16; # Word joiner +Rsv = 17; # Reserved characters +R = 18; # REPHA +S = 19; # SYM +#SM = 20; # SYM_MOD +VS = 21; # VARIATION_SELECTOR +#V = 36; # VOWEL +#VM = 40; # VOWEL_MOD +CS = 43; # CONS_WITH_STACKER +HVM = 44; # HALANT_OR_VOWEL_MODIFIER +Sk = 48; # SAKOT + +FAbv = 24; # CONS_FINAL_ABOVE +FBlw = 25; # CONS_FINAL_BELOW +FPst = 26; # CONS_FINAL_POST +MAbv = 27; # CONS_MED_ABOVE +MBlw = 28; # CONS_MED_BELOW +MPst = 29; # CONS_MED_POST +MPre = 30; # CONS_MED_PRE +CMAbv = 31; # CONS_MOD_ABOVE +CMBlw = 32; # CONS_MOD_BELOW +VAbv = 33; # VOWEL_ABOVE / VOWEL_ABOVE_BELOW / VOWEL_ABOVE_BELOW_POST / VOWEL_ABOVE_POST +VBlw = 34; # VOWEL_BELOW / VOWEL_BELOW_POST +VPst = 35; # VOWEL_POST UIPC = Right +VPre = 22; # VOWEL_PRE / VOWEL_PRE_ABOVE / VOWEL_PRE_ABOVE_POST / VOWEL_PRE_POST +VMAbv = 37; # VOWEL_MOD_ABOVE +VMBlw = 38; # VOWEL_MOD_BELOW +VMPst = 39; # VOWEL_MOD_POST +VMPre = 23; # VOWEL_MOD_PRE +SMAbv = 41; # SYM_MOD_ABOVE +SMBlw = 42; # SYM_MOD_BELOW +FMAbv = 45; # CONS_FINAL_MOD UIPC = Top +FMBlw = 46; # CONS_FINAL_MOD UIPC = Bottom +FMPst = 47; # CONS_FINAL_MOD UIPC = Not_Applicable + +h = H | HVM | Sk; + +# Override: Adhoc ZWJ placement. https://github.com/harfbuzz/harfbuzz/issues/542#issuecomment-353169729 +consonant_modifiers = CMAbv* CMBlw* ((ZWJ?.h.ZWJ? B | SUB) VS? CMAbv? CMBlw*)*; +# Override: Allow two MBlw. https://github.com/harfbuzz/harfbuzz/issues/376 +medial_consonants = MPre? MAbv? MBlw?.MBlw? MPst?; +dependent_vowels = VPre* VAbv* VBlw* VPst*; +vowel_modifiers = HVM? VMPre* VMAbv* VMBlw* VMPst*; +final_consonants = FAbv* FBlw* FPst*; +final_modifiers = FMAbv* FMBlw* | FMPst?; + +complex_syllable_start = (R | CS)? (B | GB) VS?; +complex_syllable_middle = + consonant_modifiers + medial_consonants + dependent_vowels + vowel_modifiers + (Sk B)* +; +complex_syllable_tail = + complex_syllable_middle + final_consonants + final_modifiers +; +number_joiner_terminated_cluster_tail = (HN N VS?)* HN; +numeral_cluster_tail = (HN N VS?)+; +symbol_cluster_tail = SMAbv+ SMBlw* | SMBlw+; + +virama_terminated_cluster = + complex_syllable_start + consonant_modifiers + ZWJ?.h.ZWJ? +; +sakot_terminated_cluster = + complex_syllable_start + complex_syllable_middle + Sk +; +standard_cluster = + complex_syllable_start + complex_syllable_tail +; +broken_cluster = + R? + (complex_syllable_tail | number_joiner_terminated_cluster_tail | numeral_cluster_tail | symbol_cluster_tail) +; + +number_joiner_terminated_cluster = N VS? number_joiner_terminated_cluster_tail; +numeral_cluster = N VS? numeral_cluster_tail?; +symbol_cluster = (S | GB) VS? symbol_cluster_tail?; +independent_cluster = (IND | O | Rsv | WJ) VS?; +other = any; + +main := |* + independent_cluster => { found_syllable (independent_cluster); }; + virama_terminated_cluster => { found_syllable (virama_terminated_cluster); }; + sakot_terminated_cluster => { found_syllable (sakot_terminated_cluster); }; + standard_cluster => { found_syllable (standard_cluster); }; + number_joiner_terminated_cluster => { found_syllable (number_joiner_terminated_cluster); }; + numeral_cluster => { found_syllable (numeral_cluster); }; + symbol_cluster => { found_syllable (symbol_cluster); }; + broken_cluster => { found_syllable (broken_cluster); }; + other => { found_syllable (non_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) | use_##syllable_type; \ + syllable_serial++; \ + if (unlikely (syllable_serial == 16)) syllable_serial = 1; \ + } HB_STMT_END + +static void +find_syllables_use (hb_buffer_t *buffer) +{ + unsigned int p, pe, eof, ts, te, act; + int cs; + hb_glyph_info_t *info = buffer->info; + %%{ + write init; + getkey info[p].use_category(); + }%% + + p = 0; + pe = eof = buffer->len; + + unsigned int syllable_serial = 1; + %%{ + write exec; + }%% +} + +#undef found_syllable + +#endif /* HB_OT_SHAPE_COMPLEX_USE_MACHINE_HH */ |