1/*
2 * Copyright © 2018 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_SHAPE_COMPLEX_MYANMAR_HH
28#define HB_OT_SHAPE_COMPLEX_MYANMAR_HH
29
30#include "hb.hh"
31
32#include "hb-ot-shape-complex-indic.hh"
33
34
35/* buffer var allocations */
36#define myanmar_category() indic_category() /* myanmar_category_t */
37#define myanmar_position() indic_position() /* myanmar_position_t */
38
39
40/* Note: This enum is duplicated in the -machine.rl source file.
41 * Not sure how to avoid duplication. */
42enum myanmar_category_t {
43 OT_As = 18, /* Asat */
44 OT_D0 = 20, /* Digit zero */
45 OT_DB = OT_N, /* Dot below */
46 OT_GB = OT_PLACEHOLDER,
47 OT_MH = 21, /* Various consonant medial types */
48 OT_MR = 22, /* Various consonant medial types */
49 OT_MW = 23, /* Various consonant medial types */
50 OT_MY = 24, /* Various consonant medial types */
51 OT_PT = 25, /* Pwo and other tones */
52 //OT_VAbv = 26,
53 //OT_VBlw = 27,
54 //OT_VPre = 28,
55 //OT_VPst = 29,
56 OT_VS = 30, /* Variation selectors */
57 OT_P = 31, /* Punctuation */
58 OT_D = 32, /* Digits except zero */
59};
60
61
62static inline void
63set_myanmar_properties (hb_glyph_info_t &info)
64{
65 hb_codepoint_t u = info.codepoint;
66 unsigned int type = hb_indic_get_categories (u);
67 unsigned int cat = type & 0x7Fu;
68 indic_position_t pos = (indic_position_t) (type >> 8);
69
70 /* Myanmar
71 * https://docs.microsoft.com/en-us/typography/script-development/myanmar#analyze
72 */
73 if (unlikely (hb_in_range<hb_codepoint_t> (u, 0xFE00u, 0xFE0Fu)))
74 cat = OT_VS;
75
76 switch (u)
77 {
78 case 0x104Eu:
79 cat = OT_C; /* The spec says C, IndicSyllableCategory doesn't have. */
80 break;
81
82 case 0x002Du: case 0x00A0u: case 0x00D7u: case 0x2012u:
83 case 0x2013u: case 0x2014u: case 0x2015u: case 0x2022u:
84 case 0x25CCu: case 0x25FBu: case 0x25FCu: case 0x25FDu:
85 case 0x25FEu:
86 cat = OT_GB;
87 break;
88
89 case 0x1004u: case 0x101Bu: case 0x105Au:
90 cat = OT_Ra;
91 break;
92
93 case 0x1032u: case 0x1036u:
94 cat = OT_A;
95 break;
96
97 case 0x1039u:
98 cat = OT_H;
99 break;
100
101 case 0x103Au:
102 cat = OT_As;
103 break;
104
105 case 0x1041u: case 0x1042u: case 0x1043u: case 0x1044u:
106 case 0x1045u: case 0x1046u: case 0x1047u: case 0x1048u:
107 case 0x1049u: case 0x1090u: case 0x1091u: case 0x1092u:
108 case 0x1093u: case 0x1094u: case 0x1095u: case 0x1096u:
109 case 0x1097u: case 0x1098u: case 0x1099u:
110 cat = OT_D;
111 break;
112
113 case 0x1040u:
114 cat = OT_D; /* XXX The spec says D0, but Uniscribe doesn't seem to do. */
115 break;
116
117 case 0x103Eu: case 0x1060u:
118 cat = OT_MH;
119 break;
120
121 case 0x103Cu:
122 cat = OT_MR;
123 break;
124
125 case 0x103Du: case 0x1082u:
126 cat = OT_MW;
127 break;
128
129 case 0x103Bu: case 0x105Eu: case 0x105Fu:
130 cat = OT_MY;
131 break;
132
133 case 0x1063u: case 0x1064u: case 0x1069u: case 0x106Au:
134 case 0x106Bu: case 0x106Cu: case 0x106Du: case 0xAA7Bu:
135 cat = OT_PT;
136 break;
137
138 case 0x1038u: case 0x1087u: case 0x1088u: case 0x1089u:
139 case 0x108Au: case 0x108Bu: case 0x108Cu: case 0x108Du:
140 case 0x108Fu: case 0x109Au: case 0x109Bu: case 0x109Cu:
141 cat = OT_SM;
142 break;
143
144 case 0x104Au: case 0x104Bu:
145 cat = OT_P;
146 break;
147
148 case 0xAA74u: case 0xAA75u: case 0xAA76u:
149 /* https://github.com/harfbuzz/harfbuzz/issues/218 */
150 cat = OT_C;
151 break;
152 }
153
154 if (cat == OT_M)
155 {
156 switch ((int) pos)
157 {
158 case POS_PRE_C: cat = (myanmar_category_t) OT_VPre;
159 pos = POS_PRE_M; break;
160 case POS_ABOVE_C: cat = (myanmar_category_t) OT_VAbv; break;
161 case POS_BELOW_C: cat = (myanmar_category_t) OT_VBlw; break;
162 case POS_POST_C: cat = (myanmar_category_t) OT_VPst; break;
163 }
164 }
165
166 info.myanmar_category() = cat;
167 info.myanmar_position() = pos;
168}
169
170
171#endif /* HB_OT_SHAPE_COMPLEX_MYANMAR_HH */
172