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Diffstat (limited to 'src/hb-ot-shape-complex-sea-machine.rl')
| -rw-r--r-- | src/hb-ot-shape-complex-sea-machine.rl | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/hb-ot-shape-complex-sea-machine.rl b/src/hb-ot-shape-complex-sea-machine.rl new file mode 100644 index 0000000..46140fc --- /dev/null +++ b/src/hb-ot-shape-complex-sea-machine.rl @@ -0,0 +1,102 @@ +/* + * Copyright © 2011,2012,2013 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_SHAPE_COMPLEX_SEA_MACHINE_HH +#define HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH + +#include "hb-private.hh" + +%%{ + machine sea_syllable_machine; + alphtype unsigned char; + write data; +}%% + +%%{ + +# Same order as enum sea_category_t. Not sure how to avoid duplication. +C = 1; +GB = 12; # Generic Base +H = 4; # Halant +IV = 2; # Independent Vowel +MR = 22; # Medial Ra +CM = 17; # Consonant Medial +VAbv = 26; +VBlw = 27; +VPre = 28; +VPst = 29; +T = 3; # Tone Marks +A = 10; # Anusvara + +syllable_tail = (VPre|VAbv|VBlw|VPst|H.C|CM|MR|T|A)*; + +consonant_syllable = (C|IV|GB) syllable_tail; +broken_cluster = syllable_tail; +other = any; + +main := |* + consonant_syllable => { found_syllable (consonant_syllable); }; + broken_cluster => { found_syllable (broken_cluster); }; + other => { found_syllable (non_sea_cluster); }; +*|; + + +}%% + +#define found_syllable(syllable_type) \ + HB_STMT_START { \ + if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \ + for (unsigned int i = last; i < p+1; i++) \ + info[i].syllable() = (syllable_serial << 4) | syllable_type; \ + last = p+1; \ + syllable_serial++; \ + if (unlikely (syllable_serial == 16)) syllable_serial = 1; \ + } HB_STMT_END + +static void +find_syllables (hb_buffer_t *buffer) +{ + unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED; + int cs; + hb_glyph_info_t *info = buffer->info; + %%{ + write init; + getkey info[p].sea_category(); + }%% + + p = 0; + pe = eof = buffer->len; + + unsigned int last = 0; + unsigned int syllable_serial = 1; + %%{ + write exec; + }%% +} + +#undef found_syllable + +#endif /* HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH */ |