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comparison mupdf-source/thirdparty/harfbuzz/src/hb-ot-shaper-myanmar-machine.rl @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * Copyright © 2011,2012 Google, Inc.
3 *
4 * This is part of HarfBuzz, a text shaping library.
5 *
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.
11 *
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
16 * DAMAGE.
17 *
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.
23 *
24 * Google Author(s): Behdad Esfahbod
25 */
26
27 #ifndef HB_OT_SHAPER_MYANMAR_MACHINE_HH
28 #define HB_OT_SHAPER_MYANMAR_MACHINE_HH
29
30 #include "hb.hh"
31
32 #include "hb-ot-layout.hh"
33 #include "hb-ot-shaper-indic.hh"
34
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 */
38
39 using myanmar_category_t = unsigned;
40 using myanmar_position_t = ot_position_t;
41
42 #define M_Cat(Cat) myanmar_syllable_machine_ex_##Cat
43
44 enum myanmar_syllable_type_t {
45 myanmar_consonant_syllable,
46 myanmar_broken_cluster,
47 myanmar_non_myanmar_cluster,
48 };
49
50 %%{
51 machine myanmar_syllable_machine;
52 alphtype unsigned char;
53 write exports;
54 write data;
55 }%%
56
57 %%{
58
59
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
62
63 export C = 1;
64 export IV = 2;
65 export DB = 3; # Dot below = OT_N
66 export H = 4;
67 export ZWNJ = 5;
68 export ZWJ = 6;
69 export SM = 8; # Visarga and Shan tones
70 export GB = 10; # = OT_PLACEHOLDER
71 export DOTTEDCIRCLE = 11;
72 export A = 9;
73 export Ra = 15;
74 export CS = 18;
75
76 export VAbv = 20;
77 export VBlw = 21;
78 export VPre = 22;
79 export VPst = 23;
80
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
90
91
92 j = ZWJ|ZWNJ; # Joiners
93 k = (Ra As H); # Kinzi
94
95 c = C|Ra; # is_consonant
96
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?;
101
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);
104
105 consonant_syllable = (k|CS)? (c|IV|GB|DOTTEDCIRCLE).VS? syllable_tail;
106 broken_cluster = k? VS? syllable_tail;
107 other = any;
108
109 main := |*
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); };
114 *|;
115
116
117 }%%
118
119 #define found_syllable(syllable_type) \
120 HB_STMT_START { \
121 if (0) fprintf (stderr, "syllable %d..%d %s\n", ts, te, #syllable_type); \
122 for (unsigned int i = ts; i < te; i++) \
123 info[i].syllable() = (syllable_serial << 4) | syllable_type; \
124 syllable_serial++; \
125 if (syllable_serial == 16) syllable_serial = 1; \
126 } HB_STMT_END
127
128 inline void
129 find_syllables_myanmar (hb_buffer_t *buffer)
130 {
131 unsigned int p, pe, eof, ts, te, act HB_UNUSED;
132 int cs;
133 hb_glyph_info_t *info = buffer->info;
134 %%{
135 write init;
136 getkey info[p].myanmar_category();
137 }%%
138
139 p = 0;
140 pe = eof = buffer->len;
141
142 unsigned int syllable_serial = 1;
143 %%{
144 write exec;
145 }%%
146 }
147
148 #undef found_syllable
149
150 #endif /* HB_OT_SHAPER_MYANMAR_MACHINE_HH */