2 * Copyright © 2011,2012 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 * Google Author(s): Behdad Esfahbod
27 #ifndef HB_OT_SHAPER_MYANMAR_MACHINE_HH
28 #define HB_OT_SHAPER_MYANMAR_MACHINE_HH
32 #include "hb-ot-layout.hh"
33 #include "hb-ot-shaper-indic.hh"
35 /* buffer var allocations */
36 #define myanmar_category() ot_shaper_var_u8_category() /* myanmar_category_t */
37 #define myanmar_position() ot_shaper_var_u8_auxiliary() /* myanmar_position_t */
39 using myanmar_category_t = unsigned;
40 using myanmar_position_t = ot_position_t;
42 #define M_Cat(Cat) myanmar_syllable_machine_ex_##Cat
44 enum myanmar_syllable_type_t {
45 myanmar_consonant_syllable,
46 myanmar_broken_cluster,
47 myanmar_non_myanmar_cluster,
51 machine myanmar_syllable_machine;
52 alphtype unsigned char;
60 # Spec category D is folded into GB; D0 is not implemented by Uniscribe and as such folded into D
61 # Spec category P is folded into GB
65 export DB = 3; # Dot below = OT_N
69 export SM = 8; # Visarga and Shan tones
70 export GB = 10; # = OT_PLACEHOLDER
71 export DOTTEDCIRCLE = 11;
81 # 32+ are for Myanmar-specific values
82 export As = 32; # Asat
83 export MH = 35; # Medial Ha
84 export MR = 36; # Medial Ra
85 export MW = 37; # Medial Wa, Shan Wa
86 export MY = 38; # Medial Ya, Mon Na, Mon Ma
87 export PT = 39; # Pwo and other tones
88 export VS = 40; # Variation selectors
89 export ML = 41; # Medial Mon La
92 j = ZWJ|ZWNJ; # Joiners
93 k = (Ra As H); # Kinzi
95 c = C|Ra; # is_consonant
97 medial_group = MY? As? MR? ((MW MH? ML? | MH ML? | ML) As?)?;
98 main_vowel_group = (VPre.VS?)* VAbv* VBlw* A* (DB As?)?;
99 post_vowel_group = VPst MH? ML? As* VAbv* A* (DB As?)?;
100 pwo_tone_group = PT A* DB? As?;
102 complex_syllable_tail = As* medial_group main_vowel_group post_vowel_group* pwo_tone_group* SM* j?;
103 syllable_tail = (H (c|IV).VS?)* (H | complex_syllable_tail);
105 consonant_syllable = (k|CS)? (c|IV|GB|DOTTEDCIRCLE).VS? syllable_tail;
106 broken_cluster = k? VS? syllable_tail;
110 consonant_syllable => { found_syllable (myanmar_consonant_syllable); };
111 j => { found_syllable (myanmar_non_myanmar_cluster); };
112 broken_cluster => { found_syllable (myanmar_broken_cluster); buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_BROKEN_SYLLABLE; };
113 other => { found_syllable (myanmar_non_myanmar_cluster); };
119 #define found_syllable(syllable_type) \
121 if (0) fprintf (stderr, "syllable %u..%u %s\n", ts, te, #syllable_type); \
122 for (unsigned int i = ts; i < te; i++) \
123 info[i].syllable() = (syllable_serial << 4) | syllable_type; \
125 if (syllable_serial == 16) syllable_serial = 1; \
129 find_syllables_myanmar (hb_buffer_t *buffer)
131 unsigned int p, pe, eof, ts, te, act HB_UNUSED;
133 hb_glyph_info_t *info = buffer->info;
136 getkey info[p].myanmar_category();
140 pe = eof = buffer->len;
142 unsigned int syllable_serial = 1;
148 #undef found_syllable
150 #endif /* HB_OT_SHAPER_MYANMAR_MACHINE_HH */