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gfx/harfbuzz/src/hb-ot-shape-complex-indic-private.hh@925c144e1f1f (annotated)

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.

michael@0 1 /*
michael@0 2 * Copyright © 2012 Google, Inc.
michael@0 3 *
michael@0 4 * This is part of HarfBuzz, a text shaping library.
michael@0 5 *
michael@0 6 * Permission is hereby granted, without written agreement and without
michael@0 7 * license or royalty fees, to use, copy, modify, and distribute this
michael@0 8 * software and its documentation for any purpose, provided that the
michael@0 9 * above copyright notice and the following two paragraphs appear in
michael@0 10 * all copies of this software.
michael@0 11 *
michael@0 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
michael@0 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
michael@0 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
michael@0 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
michael@0 16 * DAMAGE.
michael@0 17 *
michael@0 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
michael@0 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
michael@0 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
michael@0 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
michael@0 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
michael@0 23 *
michael@0 24 * Google Author(s): Behdad Esfahbod
michael@0 25 */
michael@0 26
michael@0 27 #ifndef HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH
michael@0 28 #define HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH
michael@0 29
michael@0 30 #include "hb-private.hh"
michael@0 31
michael@0 32
michael@0 33 #include "hb-ot-shape-complex-private.hh"
michael@0 34 #include "hb-ot-shape-private.hh" /* XXX Remove */
michael@0 35
michael@0 36
michael@0 37 #define INDIC_TABLE_ELEMENT_TYPE uint16_t
michael@0 38
michael@0 39 /* Cateories used in the OpenType spec:
michael@0 40 * https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx
michael@0 41 */
michael@0 42 /* Note: This enum is duplicated in the -machine.rl source file.
michael@0 43 * Not sure how to avoid duplication. */
michael@0 44 enum indic_category_t {
michael@0 45 OT_X = 0,
michael@0 46 OT_C = 1,
michael@0 47 OT_V = 2,
michael@0 48 OT_N = 3,
michael@0 49 OT_H = 4,
michael@0 50 OT_ZWNJ = 5,
michael@0 51 OT_ZWJ = 6,
michael@0 52 OT_M = 7,
michael@0 53 OT_SM = 8,
michael@0 54 OT_VD = 9,
michael@0 55 OT_A = 10,
michael@0 56 OT_NBSP = 11,
michael@0 57 OT_DOTTEDCIRCLE = 12,
michael@0 58 OT_RS = 13, /* Register Shifter, used in Khmer OT spec. */
michael@0 59 OT_Coeng = 14, /* Khmer-style Virama. */
michael@0 60 OT_Repha = 15, /* Atomically-encoded logical or visual repha. */
michael@0 61 OT_Ra = 16,
michael@0 62 OT_CM = 17, /* Consonant-Medial. */
michael@0 63 OT_Avag = 18, /* Avagraha. */
michael@0 64 OT_CM2 = 31 /* Consonant-Medial, second slot. */
michael@0 65 };
michael@0 66
michael@0 67 /* Visual positions in a syllable from left to right. */
michael@0 68 enum indic_position_t {
michael@0 69 POS_START,
michael@0 70
michael@0 71 POS_RA_TO_BECOME_REPH,
michael@0 72 POS_PRE_M,
michael@0 73 POS_PRE_C,
michael@0 74
michael@0 75 POS_BASE_C,
michael@0 76 POS_AFTER_MAIN,
michael@0 77
michael@0 78 POS_ABOVE_C,
michael@0 79
michael@0 80 POS_BEFORE_SUB,
michael@0 81 POS_BELOW_C,
michael@0 82 POS_AFTER_SUB,
michael@0 83
michael@0 84 POS_BEFORE_POST,
michael@0 85 POS_POST_C,
michael@0 86 POS_AFTER_POST,
michael@0 87
michael@0 88 POS_FINAL_C,
michael@0 89 POS_SMVD,
michael@0 90
michael@0 91 POS_END
michael@0 92 };
michael@0 93
michael@0 94 /* Categories used in IndicSyllabicCategory.txt from UCD. */
michael@0 95 enum indic_syllabic_category_t {
michael@0 96 INDIC_SYLLABIC_CATEGORY_OTHER = OT_X,
michael@0 97
michael@0 98 INDIC_SYLLABIC_CATEGORY_AVAGRAHA = OT_Avag,
michael@0 99 INDIC_SYLLABIC_CATEGORY_BINDU = OT_SM,
michael@0 100 INDIC_SYLLABIC_CATEGORY_CONSONANT = OT_C,
michael@0 101 INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD = OT_C,
michael@0 102 INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL = OT_CM,
michael@0 103 INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C,
michael@0 104 INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL = OT_CM,
michael@0 105 INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_NBSP,
michael@0 106 INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_CM,
michael@0 107 INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA = OT_Repha,
michael@0 108 INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER = OT_X,
michael@0 109 INDIC_SYLLABIC_CATEGORY_NUKTA = OT_N,
michael@0 110 INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER = OT_RS,
michael@0 111 INDIC_SYLLABIC_CATEGORY_TONE_LETTER = OT_X,
michael@0 112 INDIC_SYLLABIC_CATEGORY_TONE_MARK = OT_N,
michael@0 113 INDIC_SYLLABIC_CATEGORY_VIRAMA = OT_H,
michael@0 114 INDIC_SYLLABIC_CATEGORY_VISARGA = OT_SM,
michael@0 115 INDIC_SYLLABIC_CATEGORY_VOWEL = OT_V,
michael@0 116 INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT = OT_M,
michael@0 117 INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT = OT_V
michael@0 118 };
michael@0 119
michael@0 120 /* Categories used in IndicSMatraCategory.txt from UCD */
michael@0 121 enum indic_matra_category_t {
michael@0 122 INDIC_MATRA_CATEGORY_NOT_APPLICABLE = POS_END,
michael@0 123
michael@0 124 INDIC_MATRA_CATEGORY_LEFT = POS_PRE_C,
michael@0 125 INDIC_MATRA_CATEGORY_TOP = POS_ABOVE_C,
michael@0 126 INDIC_MATRA_CATEGORY_BOTTOM = POS_BELOW_C,
michael@0 127 INDIC_MATRA_CATEGORY_RIGHT = POS_POST_C,
michael@0 128
michael@0 129 /* These should resolve to the position of the last part of the split sequence. */
michael@0 130 INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
michael@0 131 INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
michael@0 132 INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM = INDIC_MATRA_CATEGORY_BOTTOM,
michael@0 133 INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
michael@0 134 INDIC_MATRA_CATEGORY_TOP_AND_LEFT = INDIC_MATRA_CATEGORY_TOP,
michael@0 135 INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
michael@0 136 INDIC_MATRA_CATEGORY_TOP_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
michael@0 137
michael@0 138 INDIC_MATRA_CATEGORY_INVISIBLE = INDIC_MATRA_CATEGORY_NOT_APPLICABLE,
michael@0 139 INDIC_MATRA_CATEGORY_OVERSTRUCK = POS_AFTER_MAIN,
michael@0 140 INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT = POS_PRE_M
michael@0 141 };
michael@0 142
michael@0 143 /* Note: We use ASSERT_STATIC_EXPR_ZERO() instead of ASSERT_STATIC_EXPR() and the comma operation
michael@0 144 * because gcc fails to optimize the latter and fills the table in at runtime. */
michael@0 145 #define INDIC_COMBINE_CATEGORIES(S,M) \
michael@0 146 (ASSERT_STATIC_EXPR_ZERO (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || (S == INDIC_SYLLABIC_CATEGORY_VIRAMA || S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT)) + \
michael@0 147 ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \
michael@0 148 ((M << 8) | S))
michael@0 149
michael@0 150 HB_INTERNAL INDIC_TABLE_ELEMENT_TYPE
michael@0 151 hb_indic_get_categories (hb_codepoint_t u);
michael@0 152
michael@0 153 #endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */

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