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. */
42 enum 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 OT_ML = 33, /* Various consonant medial types */
60 };
61
62 using myanmar_position_t = indic_position_t;
63
64 static inline void
set_myanmar_properties(hb_glyph_info_t & info)65 set_myanmar_properties (hb_glyph_info_t &info)
66 {
67 hb_codepoint_t u = info.codepoint;
68 unsigned int type = hb_indic_get_categories (u);
69 unsigned int cat = type & 0xFFu;
70 myanmar_position_t pos = (myanmar_position_t) (type >> 8);
71
72 /* Myanmar
73 * https://docs.microsoft.com/en-us/typography/script-development/myanmar#analyze
74 */
75 if (unlikely (hb_in_range<hb_codepoint_t> (u, 0xFE00u, 0xFE0Fu)))
76 cat = OT_VS;
77
78 switch (u)
79 {
80 case 0x104Eu:
81 cat = OT_C; /* The spec says C, IndicSyllableCategory doesn't have. */
82 break;
83
84 case 0x002Du: case 0x00A0u: case 0x00D7u: case 0x2012u:
85 case 0x2013u: case 0x2014u: case 0x2015u: case 0x2022u:
86 case 0x25CCu: case 0x25FBu: case 0x25FCu: case 0x25FDu:
87 case 0x25FEu:
88 cat = OT_GB;
89 break;
90
91 case 0x1004u: case 0x101Bu: case 0x105Au:
92 cat = OT_Ra;
93 break;
94
95 case 0x1032u: case 0x1036u:
96 cat = OT_A;
97 break;
98
99 case 0x1039u:
100 cat = OT_H;
101 break;
102
103 case 0x103Au:
104 cat = OT_As;
105 break;
106
107 case 0x1041u: case 0x1042u: case 0x1043u: case 0x1044u:
108 case 0x1045u: case 0x1046u: case 0x1047u: case 0x1048u:
109 case 0x1049u: case 0x1090u: case 0x1091u: case 0x1092u:
110 case 0x1093u: case 0x1094u: case 0x1095u: case 0x1096u:
111 case 0x1097u: case 0x1098u: case 0x1099u:
112 cat = OT_D;
113 break;
114
115 case 0x1040u:
116 cat = OT_D; /* XXX The spec says D0, but Uniscribe doesn't seem to do. */
117 break;
118
119 case 0x103Eu:
120 cat = OT_MH;
121 break;
122
123 case 0x1060u:
124 cat = OT_ML;
125 break;
126
127 case 0x103Cu:
128 cat = OT_MR;
129 break;
130
131 case 0x103Du: case 0x1082u:
132 cat = OT_MW;
133 break;
134
135 case 0x103Bu: case 0x105Eu: case 0x105Fu:
136 cat = OT_MY;
137 break;
138
139 case 0x1063u: case 0x1064u: case 0x1069u: case 0x106Au:
140 case 0x106Bu: case 0x106Cu: case 0x106Du: case 0xAA7Bu:
141 cat = OT_PT;
142 break;
143
144 case 0x1038u: case 0x1087u: case 0x1088u: case 0x1089u:
145 case 0x108Au: case 0x108Bu: case 0x108Cu: case 0x108Du:
146 case 0x108Fu: case 0x109Au: case 0x109Bu: case 0x109Cu:
147 cat = OT_SM;
148 break;
149
150 case 0x104Au: case 0x104Bu:
151 cat = OT_P;
152 break;
153
154 case 0xAA74u: case 0xAA75u: case 0xAA76u:
155 /* https://github.com/harfbuzz/harfbuzz/issues/218 */
156 cat = OT_C;
157 break;
158 }
159
160 if (cat == OT_M)
161 {
162 switch ((int) pos)
163 {
164 case POS_PRE_C: cat = (myanmar_category_t) OT_VPre;
165 pos = POS_PRE_M; break;
166 case POS_ABOVE_C: cat = (myanmar_category_t) OT_VAbv; break;
167 case POS_BELOW_C: cat = (myanmar_category_t) OT_VBlw; break;
168 case POS_POST_C: cat = (myanmar_category_t) OT_VPst; break;
169 }
170 }
171
172 info.myanmar_category() = cat;
173 info.myanmar_position() = pos;
174 }
175
176
177 #endif /* HB_OT_SHAPE_COMPLEX_MYANMAR_HH */
178