1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* Copyright © 2012 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_INDIC_PRIVATE_HH
#define HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH
#include "hb-private.hh"
#include "hb-ot-shape-complex-private.hh"
#include "hb-ot-shape-private.hh" /* XXX Remove */
#define INDIC_TABLE_ELEMENT_TYPE uint16_t
/* Cateories used in the OpenType spec:
* https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx
*/
/* Note: This enum is duplicated in the -machine.rl source file.
* Not sure how to avoid duplication. */
enum indic_category_t {
OT_X = 0,
OT_C = 1,
OT_V = 2,
OT_N = 3,
OT_H = 4,
OT_ZWNJ = 5,
OT_ZWJ = 6,
OT_M = 7,
OT_SM = 8,
OT_VD = 9,
OT_A = 10,
OT_PLACEHOLDER = 11,
OT_DOTTEDCIRCLE = 12,
OT_RS = 13, /* Register Shifter, used in Khmer OT spec. */
OT_Coeng = 14, /* Khmer-style Virama. */
OT_Repha = 15, /* Atomically-encoded logical or visual repha. */
OT_Ra = 16,
OT_CM = 17, /* Consonant-Medial. */
OT_Symbol = 18 /* Avagraha, etc that take marks (SM,A,VD). */
};
#define MEDIAL_FLAGS (FLAG (OT_CM))
/* Note:
*
* We treat Vowels and placeholders as if they were consonants. This is safe because Vowels
* cannot happen in a consonant syllable. The plus side however is, we can call the
* consonant syllable logic from the vowel syllable function and get it all right! */
#define CONSONANT_FLAGS (FLAG (OT_C) | FLAG (OT_Ra) | MEDIAL_FLAGS | FLAG (OT_V) | FLAG (OT_PLACEHOLDER) | FLAG (OT_DOTTEDCIRCLE))
#define JOINER_FLAGS (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ))
#define HALANT_OR_COENG_FLAGS (FLAG (OT_H) | FLAG (OT_Coeng))
/* Visual positions in a syllable from left to right. */
enum indic_position_t {
POS_START,
POS_RA_TO_BECOME_REPH,
POS_PRE_M,
POS_PRE_C,
POS_BASE_C,
POS_AFTER_MAIN,
POS_ABOVE_C,
POS_BEFORE_SUB,
POS_BELOW_C,
POS_AFTER_SUB,
POS_BEFORE_POST,
POS_POST_C,
POS_AFTER_POST,
POS_FINAL_C,
POS_SMVD,
POS_END
};
/* Categories used in IndicSyllabicCategory.txt from UCD. */
enum indic_syllabic_category_t {
INDIC_SYLLABIC_CATEGORY_OTHER = OT_X,
INDIC_SYLLABIC_CATEGORY_AVAGRAHA = OT_Symbol,
INDIC_SYLLABIC_CATEGORY_BINDU = OT_SM,
INDIC_SYLLABIC_CATEGORY_BRAHMI_JOINING_NUMBER = OT_PLACEHOLDER, /* Don't care. */
INDIC_SYLLABIC_CATEGORY_CANTILLATION_MARK = OT_A,
INDIC_SYLLABIC_CATEGORY_CONSONANT = OT_C,
INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD = OT_C,
INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL = OT_CM,
INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C,
INDIC_SYLLABIC_CATEGORY_CONSONANT_KILLER = OT_M, /* U+17CD only. */
INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL = OT_CM,
INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_PLACEHOLDER,
INDIC_SYLLABIC_CATEGORY_CONSONANT_PRECEDING_REPHA = OT_Repha,
INDIC_SYLLABIC_CATEGORY_CONSONANT_PREFIXED = OT_X, /* Don't care. */
INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_CM,
INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA = OT_N,
INDIC_SYLLABIC_CATEGORY_CONSONANT_WITH_STACKER = OT_Repha, /* TODO */
INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK = OT_SM,
INDIC_SYLLABIC_CATEGORY_INVISIBLE_STACKER = OT_Coeng,
INDIC_SYLLABIC_CATEGORY_JOINER = OT_ZWJ,
INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER = OT_X,
INDIC_SYLLABIC_CATEGORY_NON_JOINER = OT_ZWNJ,
INDIC_SYLLABIC_CATEGORY_NUKTA = OT_N,
INDIC_SYLLABIC_CATEGORY_NUMBER = OT_PLACEHOLDER,
INDIC_SYLLABIC_CATEGORY_NUMBER_JOINER = OT_PLACEHOLDER, /* Don't care. */
INDIC_SYLLABIC_CATEGORY_PURE_KILLER = OT_M, /* Is like a vowel matra. */
INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER = OT_RS,
INDIC_SYLLABIC_CATEGORY_SYLLABLE_MODIFIER = OT_M, /* Misc Khmer signs. */
INDIC_SYLLABIC_CATEGORY_TONE_LETTER = OT_X,
INDIC_SYLLABIC_CATEGORY_TONE_MARK = OT_N,
INDIC_SYLLABIC_CATEGORY_VIRAMA = OT_H,
INDIC_SYLLABIC_CATEGORY_VISARGA = OT_SM,
INDIC_SYLLABIC_CATEGORY_VOWEL = OT_V,
INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT = OT_M,
INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT = OT_V
};
/* Categories used in IndicSMatraCategory.txt from UCD */
enum indic_matra_category_t {
INDIC_MATRA_CATEGORY_NOT_APPLICABLE = POS_END,
INDIC_MATRA_CATEGORY_LEFT = POS_PRE_C,
INDIC_MATRA_CATEGORY_TOP = POS_ABOVE_C,
INDIC_MATRA_CATEGORY_BOTTOM = POS_BELOW_C,
INDIC_MATRA_CATEGORY_RIGHT = POS_POST_C,
/* These should resolve to the position of the last part of the split sequence. */
INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM = INDIC_MATRA_CATEGORY_BOTTOM,
INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
INDIC_MATRA_CATEGORY_TOP_AND_LEFT = INDIC_MATRA_CATEGORY_TOP,
INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
INDIC_MATRA_CATEGORY_TOP_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
INDIC_MATRA_CATEGORY_OVERSTRUCK = POS_AFTER_MAIN,
INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT = POS_PRE_M
};
#define INDIC_COMBINE_CATEGORIES(S,M) \
( \
ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \
( S | \
( \
( \
S == INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL || \
S == INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK || \
S == INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER || \
S == INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA || \
S == INDIC_SYLLABIC_CATEGORY_VIRAMA || \
S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT || \
false \
? M : INDIC_MATRA_CATEGORY_NOT_APPLICABLE \
) << 8 \
) \
) \
)
HB_INTERNAL INDIC_TABLE_ELEMENT_TYPE
hb_indic_get_categories (hb_codepoint_t u);
#endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */
|
