| /* |
| * 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 */ |
