1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/harfbuzz/src/hb-ot-shape-complex-indic-private.hh Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,153 @@
1.4 +/*
1.5 + * Copyright © 2012 Google, Inc.
1.6 + *
1.7 + * This is part of HarfBuzz, a text shaping library.
1.8 + *
1.9 + * Permission is hereby granted, without written agreement and without
1.10 + * license or royalty fees, to use, copy, modify, and distribute this
1.11 + * software and its documentation for any purpose, provided that the
1.12 + * above copyright notice and the following two paragraphs appear in
1.13 + * all copies of this software.
1.14 + *
1.15 + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
1.16 + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
1.17 + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
1.18 + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
1.19 + * DAMAGE.
1.20 + *
1.21 + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
1.22 + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.23 + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
1.24 + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
1.25 + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
1.26 + *
1.27 + * Google Author(s): Behdad Esfahbod
1.28 + */
1.29 +
1.30 +#ifndef HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH
1.31 +#define HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH
1.32 +
1.33 +#include "hb-private.hh"
1.34 +
1.35 +
1.36 +#include "hb-ot-shape-complex-private.hh"
1.37 +#include "hb-ot-shape-private.hh" /* XXX Remove */
1.38 +
1.39 +
1.40 +#define INDIC_TABLE_ELEMENT_TYPE uint16_t
1.41 +
1.42 +/* Cateories used in the OpenType spec:
1.43 + * https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx
1.44 + */
1.45 +/* Note: This enum is duplicated in the -machine.rl source file.
1.46 + * Not sure how to avoid duplication. */
1.47 +enum indic_category_t {
1.48 + OT_X = 0,
1.49 + OT_C = 1,
1.50 + OT_V = 2,
1.51 + OT_N = 3,
1.52 + OT_H = 4,
1.53 + OT_ZWNJ = 5,
1.54 + OT_ZWJ = 6,
1.55 + OT_M = 7,
1.56 + OT_SM = 8,
1.57 + OT_VD = 9,
1.58 + OT_A = 10,
1.59 + OT_NBSP = 11,
1.60 + OT_DOTTEDCIRCLE = 12,
1.61 + OT_RS = 13, /* Register Shifter, used in Khmer OT spec. */
1.62 + OT_Coeng = 14, /* Khmer-style Virama. */
1.63 + OT_Repha = 15, /* Atomically-encoded logical or visual repha. */
1.64 + OT_Ra = 16,
1.65 + OT_CM = 17, /* Consonant-Medial. */
1.66 + OT_Avag = 18, /* Avagraha. */
1.67 + OT_CM2 = 31 /* Consonant-Medial, second slot. */
1.68 +};
1.69 +
1.70 +/* Visual positions in a syllable from left to right. */
1.71 +enum indic_position_t {
1.72 + POS_START,
1.73 +
1.74 + POS_RA_TO_BECOME_REPH,
1.75 + POS_PRE_M,
1.76 + POS_PRE_C,
1.77 +
1.78 + POS_BASE_C,
1.79 + POS_AFTER_MAIN,
1.80 +
1.81 + POS_ABOVE_C,
1.82 +
1.83 + POS_BEFORE_SUB,
1.84 + POS_BELOW_C,
1.85 + POS_AFTER_SUB,
1.86 +
1.87 + POS_BEFORE_POST,
1.88 + POS_POST_C,
1.89 + POS_AFTER_POST,
1.90 +
1.91 + POS_FINAL_C,
1.92 + POS_SMVD,
1.93 +
1.94 + POS_END
1.95 +};
1.96 +
1.97 +/* Categories used in IndicSyllabicCategory.txt from UCD. */
1.98 +enum indic_syllabic_category_t {
1.99 + INDIC_SYLLABIC_CATEGORY_OTHER = OT_X,
1.100 +
1.101 + INDIC_SYLLABIC_CATEGORY_AVAGRAHA = OT_Avag,
1.102 + INDIC_SYLLABIC_CATEGORY_BINDU = OT_SM,
1.103 + INDIC_SYLLABIC_CATEGORY_CONSONANT = OT_C,
1.104 + INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD = OT_C,
1.105 + INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL = OT_CM,
1.106 + INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C,
1.107 + INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL = OT_CM,
1.108 + INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_NBSP,
1.109 + INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_CM,
1.110 + INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA = OT_Repha,
1.111 + INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER = OT_X,
1.112 + INDIC_SYLLABIC_CATEGORY_NUKTA = OT_N,
1.113 + INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER = OT_RS,
1.114 + INDIC_SYLLABIC_CATEGORY_TONE_LETTER = OT_X,
1.115 + INDIC_SYLLABIC_CATEGORY_TONE_MARK = OT_N,
1.116 + INDIC_SYLLABIC_CATEGORY_VIRAMA = OT_H,
1.117 + INDIC_SYLLABIC_CATEGORY_VISARGA = OT_SM,
1.118 + INDIC_SYLLABIC_CATEGORY_VOWEL = OT_V,
1.119 + INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT = OT_M,
1.120 + INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT = OT_V
1.121 +};
1.122 +
1.123 +/* Categories used in IndicSMatraCategory.txt from UCD */
1.124 +enum indic_matra_category_t {
1.125 + INDIC_MATRA_CATEGORY_NOT_APPLICABLE = POS_END,
1.126 +
1.127 + INDIC_MATRA_CATEGORY_LEFT = POS_PRE_C,
1.128 + INDIC_MATRA_CATEGORY_TOP = POS_ABOVE_C,
1.129 + INDIC_MATRA_CATEGORY_BOTTOM = POS_BELOW_C,
1.130 + INDIC_MATRA_CATEGORY_RIGHT = POS_POST_C,
1.131 +
1.132 + /* These should resolve to the position of the last part of the split sequence. */
1.133 + INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
1.134 + INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
1.135 + INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM = INDIC_MATRA_CATEGORY_BOTTOM,
1.136 + INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
1.137 + INDIC_MATRA_CATEGORY_TOP_AND_LEFT = INDIC_MATRA_CATEGORY_TOP,
1.138 + INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
1.139 + INDIC_MATRA_CATEGORY_TOP_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
1.140 +
1.141 + INDIC_MATRA_CATEGORY_INVISIBLE = INDIC_MATRA_CATEGORY_NOT_APPLICABLE,
1.142 + INDIC_MATRA_CATEGORY_OVERSTRUCK = POS_AFTER_MAIN,
1.143 + INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT = POS_PRE_M
1.144 +};
1.145 +
1.146 +/* Note: We use ASSERT_STATIC_EXPR_ZERO() instead of ASSERT_STATIC_EXPR() and the comma operation
1.147 + * because gcc fails to optimize the latter and fills the table in at runtime. */
1.148 +#define INDIC_COMBINE_CATEGORIES(S,M) \
1.149 + (ASSERT_STATIC_EXPR_ZERO (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || (S == INDIC_SYLLABIC_CATEGORY_VIRAMA || S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT)) + \
1.150 + ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \
1.151 + ((M << 8) | S))
1.152 +
1.153 +HB_INTERNAL INDIC_TABLE_ELEMENT_TYPE
1.154 +hb_indic_get_categories (hb_codepoint_t u);
1.155 +
1.156 +#endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */
