/* * 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" /* buffer var allocations */ #define indic_category() complex_var_persistent_u8_0() /* indic_category_t */ #define indic_position() complex_var_persistent_u8_1() /* indic_matra_category_t */ #define IN_HALF_BLOCK(u, Base) (((u) & ~0x7F) == (Base)) #define IS_DEVA(u) (IN_HALF_BLOCK (u, 0x900)) #define IS_BENG(u) (IN_HALF_BLOCK (u, 0x980)) #define IS_GURM(u) (IN_HALF_BLOCK (u, 0xA00)) #define IS_GUJA(u) (IN_HALF_BLOCK (u, 0xA80)) #define IS_ORYA(u) (IN_HALF_BLOCK (u, 0xB00)) #define IS_TAML(u) (IN_HALF_BLOCK (u, 0xB80)) #define IS_TELU(u) (IN_HALF_BLOCK (u, 0xC00)) #define IS_KNDA(u) (IN_HALF_BLOCK (u, 0xC80)) #define IS_MLYM(u) (IN_HALF_BLOCK (u, 0xD00)) #define IS_SINH(u) (IN_HALF_BLOCK (u, 0xD80)) #define INDIC_TABLE_ELEMENT_TYPE uint8_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, OT_V, OT_N, OT_H, OT_ZWNJ, OT_ZWJ, OT_M, OT_SM, OT_VD, OT_A, OT_NBSP, OT_DOTTEDCIRCLE, /* Not in the spec, but special in Uniscribe. /Very very/ special! */ OT_RS, /* Register Shifter, used in Khmer OT spec */ OT_Coeng, OT_Repha, OT_Ra /* Not explicitly listed in the OT spec, but used in the grammar. */ }; /* 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_X, INDIC_SYLLABIC_CATEGORY_BINDU = OT_SM, INDIC_SYLLABIC_CATEGORY_CONSONANT = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_NBSP, INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_C, INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA = OT_Repha, INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER = OT_X, INDIC_SYLLABIC_CATEGORY_NUKTA = OT_N, INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER = OT_RS, INDIC_SYLLABIC_CATEGORY_TONE_LETTER = OT_X, INDIC_SYLLABIC_CATEGORY_TONE_MARK = OT_X, 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_INVISIBLE = INDIC_MATRA_CATEGORY_NOT_APPLICABLE, INDIC_MATRA_CATEGORY_OVERSTRUCK = INDIC_MATRA_CATEGORY_NOT_APPLICABLE, INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT = INDIC_MATRA_CATEGORY_NOT_APPLICABLE }; /* Note: We use ASSERT_STATIC_EXPR_ZERO() instead of ASSERT_STATIC_EXPR() and the comma operation * because gcc fails to optimize the latter and fills the table in at runtime. */ #define INDIC_COMBINE_CATEGORIES(S,M) \ (ASSERT_STATIC_EXPR_ZERO (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || (S == INDIC_SYLLABIC_CATEGORY_VIRAMA || S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT)) + \ ASSERT_STATIC_EXPR_ZERO (S < 16 && M < 16) + \ ((M << 4) | S)) #include "hb-ot-shape-complex-indic-table.hh" /* XXX * This is a hack for now. We should move this data into the main Indic table. * Or completely remove it and just check in the tables. */ static const hb_codepoint_t ra_chars[] = { 0x0930, /* Devanagari */ 0x09B0, /* Bengali */ 0x09F0, /* Bengali */ 0x0A30, /* Gurmukhi */ /* No Reph */ 0x0AB0, /* Gujarati */ 0x0B30, /* Oriya */ 0x0BB0, /* Tamil */ /* No Reph */ 0x0C30, /* Telugu */ /* Reph formed only with ZWJ */ 0x0CB0, /* Kannada */ 0x0D30, /* Malayalam */ /* No Reph, Logical Repha */ 0x0DBB, /* Sinhala */ /* Reph formed only with ZWJ */ 0x179A, /* Khmer */ /* No Reph, Visual Repha */ }; #endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */