gfx/harfbuzz/src/hb-ot-shape-complex-indic-private.hh@925c144e1f1f
gfx/harfbuzz/src/hb-ot-shape-complex-indic-private.hh
Fri, 16 Jan 2015 18:13:44 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 18:13:44 +0100
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
- permissions
- -rw-r--r--
Integrate suggestion from review to improve consistency with existing code.
1 /*
2 * Copyright © 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 */
27 #ifndef HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH
28 #define HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH
30 #include "hb-private.hh"
33 #include "hb-ot-shape-complex-private.hh"
34 #include "hb-ot-shape-private.hh" /* XXX Remove */
37 #define INDIC_TABLE_ELEMENT_TYPE uint16_t
39 /* Cateories used in the OpenType spec:
40 * https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx
41 */
42 /* Note: This enum is duplicated in the -machine.rl source file.
43 * Not sure how to avoid duplication. */
44 enum indic_category_t {
45 OT_X = 0,
46 OT_C = 1,
47 OT_V = 2,
48 OT_N = 3,
49 OT_H = 4,
50 OT_ZWNJ = 5,
51 OT_ZWJ = 6,
52 OT_M = 7,
53 OT_SM = 8,
54 OT_VD = 9,
55 OT_A = 10,
56 OT_NBSP = 11,
57 OT_DOTTEDCIRCLE = 12,
58 OT_RS = 13, /* Register Shifter, used in Khmer OT spec. */
59 OT_Coeng = 14, /* Khmer-style Virama. */
60 OT_Repha = 15, /* Atomically-encoded logical or visual repha. */
61 OT_Ra = 16,
62 OT_CM = 17, /* Consonant-Medial. */
63 OT_Avag = 18, /* Avagraha. */
64 OT_CM2 = 31 /* Consonant-Medial, second slot. */
65 };
67 /* Visual positions in a syllable from left to right. */
68 enum indic_position_t {
69 POS_START,
71 POS_RA_TO_BECOME_REPH,
72 POS_PRE_M,
73 POS_PRE_C,
75 POS_BASE_C,
76 POS_AFTER_MAIN,
78 POS_ABOVE_C,
80 POS_BEFORE_SUB,
81 POS_BELOW_C,
82 POS_AFTER_SUB,
84 POS_BEFORE_POST,
85 POS_POST_C,
86 POS_AFTER_POST,
88 POS_FINAL_C,
89 POS_SMVD,
91 POS_END
92 };
94 /* Categories used in IndicSyllabicCategory.txt from UCD. */
95 enum indic_syllabic_category_t {
96 INDIC_SYLLABIC_CATEGORY_OTHER = OT_X,
98 INDIC_SYLLABIC_CATEGORY_AVAGRAHA = OT_Avag,
99 INDIC_SYLLABIC_CATEGORY_BINDU = OT_SM,
100 INDIC_SYLLABIC_CATEGORY_CONSONANT = OT_C,
101 INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD = OT_C,
102 INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL = OT_CM,
103 INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C,
104 INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL = OT_CM,
105 INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_NBSP,
106 INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_CM,
107 INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA = OT_Repha,
108 INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER = OT_X,
109 INDIC_SYLLABIC_CATEGORY_NUKTA = OT_N,
110 INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER = OT_RS,
111 INDIC_SYLLABIC_CATEGORY_TONE_LETTER = OT_X,
112 INDIC_SYLLABIC_CATEGORY_TONE_MARK = OT_N,
113 INDIC_SYLLABIC_CATEGORY_VIRAMA = OT_H,
114 INDIC_SYLLABIC_CATEGORY_VISARGA = OT_SM,
115 INDIC_SYLLABIC_CATEGORY_VOWEL = OT_V,
116 INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT = OT_M,
117 INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT = OT_V
118 };
120 /* Categories used in IndicSMatraCategory.txt from UCD */
121 enum indic_matra_category_t {
122 INDIC_MATRA_CATEGORY_NOT_APPLICABLE = POS_END,
124 INDIC_MATRA_CATEGORY_LEFT = POS_PRE_C,
125 INDIC_MATRA_CATEGORY_TOP = POS_ABOVE_C,
126 INDIC_MATRA_CATEGORY_BOTTOM = POS_BELOW_C,
127 INDIC_MATRA_CATEGORY_RIGHT = POS_POST_C,
129 /* These should resolve to the position of the last part of the split sequence. */
130 INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
131 INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
132 INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM = INDIC_MATRA_CATEGORY_BOTTOM,
133 INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
134 INDIC_MATRA_CATEGORY_TOP_AND_LEFT = INDIC_MATRA_CATEGORY_TOP,
135 INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
136 INDIC_MATRA_CATEGORY_TOP_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
138 INDIC_MATRA_CATEGORY_INVISIBLE = INDIC_MATRA_CATEGORY_NOT_APPLICABLE,
139 INDIC_MATRA_CATEGORY_OVERSTRUCK = POS_AFTER_MAIN,
140 INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT = POS_PRE_M
141 };
143 /* Note: We use ASSERT_STATIC_EXPR_ZERO() instead of ASSERT_STATIC_EXPR() and the comma operation
144 * because gcc fails to optimize the latter and fills the table in at runtime. */
145 #define INDIC_COMBINE_CATEGORIES(S,M) \
146 (ASSERT_STATIC_EXPR_ZERO (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || (S == INDIC_SYLLABIC_CATEGORY_VIRAMA || S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT)) + \
147 ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \
148 ((M << 8) | S))
150 HB_INTERNAL INDIC_TABLE_ELEMENT_TYPE
151 hb_indic_get_categories (hb_codepoint_t u);
153 #endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */
