/* * 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). */ OT_CM2 = 31 /* Consonant-Medial, second slot. */ }; #define MEDIAL_FLAGS (FLAG (OT_CM) | FLAG (OT_CM2)) /* 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, /* TODO */ 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_MEDIAL = OT_CM, INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_PLACEHOLDER, INDIC_SYLLABIC_CATEGORY_CONSONANT_PRECEDING_REPHA = OT_Repha, INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_CM, INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA = OT_N, INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK = OT_SM, INDIC_SYLLABIC_CATEGORY_INVISIBLE_STACKER = OT_H, /* TODO */ 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, /* TODO */ INDIC_SYLLABIC_CATEGORY_PURE_KILLER = OT_H, /* TODO */ INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER = OT_RS, 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 (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || \ ( \ 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)) + \ ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \ ((M << 8) | S)) HB_INTERNAL INDIC_TABLE_ELEMENT_TYPE hb_indic_get_categories (hb_codepoint_t u); #endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */