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Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-indic-private.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-indic-private.hh | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-indic-private.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-indic-private.hh new file mode 100644 index 0000000000..39268b1453 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-indic-private.hh @@ -0,0 +1,151 @@ +/* + * 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, + 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. */ + OT_CM +}; + +/* 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_CM, + INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C, + INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL = OT_CM, + 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_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_INVISIBLE = INDIC_MATRA_CATEGORY_NOT_APPLICABLE, + INDIC_MATRA_CATEGORY_OVERSTRUCK = POS_AFTER_MAIN, + INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT = POS_PRE_M +}; + +/* 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 < 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 */ |