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Diffstat (limited to 'thirdparty/harfbuzz/src/hb-ot-shape-complex-myanmar.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-ot-shape-complex-myanmar.hh | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/thirdparty/harfbuzz/src/hb-ot-shape-complex-myanmar.hh b/thirdparty/harfbuzz/src/hb-ot-shape-complex-myanmar.hh new file mode 100644 index 0000000000..7b9821e6ba --- /dev/null +++ b/thirdparty/harfbuzz/src/hb-ot-shape-complex-myanmar.hh @@ -0,0 +1,171 @@ +/* + * Copyright © 2018 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_MYANMAR_HH +#define HB_OT_SHAPE_COMPLEX_MYANMAR_HH + +#include "hb.hh" + +#include "hb-ot-shape-complex-indic.hh" + + +/* buffer var allocations */ +#define myanmar_category() indic_category() /* myanmar_category_t */ +#define myanmar_position() indic_position() /* myanmar_position_t */ + + +/* Note: This enum is duplicated in the -machine.rl source file. + * Not sure how to avoid duplication. */ +enum myanmar_category_t { + OT_As = 18, /* Asat */ + OT_D0 = 20, /* Digit zero */ + OT_DB = OT_N, /* Dot below */ + OT_GB = OT_PLACEHOLDER, + OT_MH = 21, /* Various consonant medial types */ + OT_MR = 22, /* Various consonant medial types */ + OT_MW = 23, /* Various consonant medial types */ + OT_MY = 24, /* Various consonant medial types */ + OT_PT = 25, /* Pwo and other tones */ + //OT_VAbv = 26, + //OT_VBlw = 27, + //OT_VPre = 28, + //OT_VPst = 29, + OT_VS = 30, /* Variation selectors */ + OT_P = 31, /* Punctuation */ + OT_D = 32, /* Digits except zero */ +}; + + +static inline void +set_myanmar_properties (hb_glyph_info_t &info) +{ + hb_codepoint_t u = info.codepoint; + unsigned int type = hb_indic_get_categories (u); + unsigned int cat = type & 0x7Fu; + indic_position_t pos = (indic_position_t) (type >> 8); + + /* Myanmar + * https://docs.microsoft.com/en-us/typography/script-development/myanmar#analyze + */ + if (unlikely (hb_in_range<hb_codepoint_t> (u, 0xFE00u, 0xFE0Fu))) + cat = OT_VS; + + switch (u) + { + case 0x104Eu: + cat = OT_C; /* The spec says C, IndicSyllableCategory doesn't have. */ + break; + + case 0x002Du: case 0x00A0u: case 0x00D7u: case 0x2012u: + case 0x2013u: case 0x2014u: case 0x2015u: case 0x2022u: + case 0x25CCu: case 0x25FBu: case 0x25FCu: case 0x25FDu: + case 0x25FEu: + cat = OT_GB; + break; + + case 0x1004u: case 0x101Bu: case 0x105Au: + cat = OT_Ra; + break; + + case 0x1032u: case 0x1036u: + cat = OT_A; + break; + + case 0x1039u: + cat = OT_H; + break; + + case 0x103Au: + cat = OT_As; + break; + + case 0x1041u: case 0x1042u: case 0x1043u: case 0x1044u: + case 0x1045u: case 0x1046u: case 0x1047u: case 0x1048u: + case 0x1049u: case 0x1090u: case 0x1091u: case 0x1092u: + case 0x1093u: case 0x1094u: case 0x1095u: case 0x1096u: + case 0x1097u: case 0x1098u: case 0x1099u: + cat = OT_D; + break; + + case 0x1040u: + cat = OT_D; /* XXX The spec says D0, but Uniscribe doesn't seem to do. */ + break; + + case 0x103Eu: case 0x1060u: + cat = OT_MH; + break; + + case 0x103Cu: + cat = OT_MR; + break; + + case 0x103Du: case 0x1082u: + cat = OT_MW; + break; + + case 0x103Bu: case 0x105Eu: case 0x105Fu: + cat = OT_MY; + break; + + case 0x1063u: case 0x1064u: case 0x1069u: case 0x106Au: + case 0x106Bu: case 0x106Cu: case 0x106Du: case 0xAA7Bu: + cat = OT_PT; + break; + + case 0x1038u: case 0x1087u: case 0x1088u: case 0x1089u: + case 0x108Au: case 0x108Bu: case 0x108Cu: case 0x108Du: + case 0x108Fu: case 0x109Au: case 0x109Bu: case 0x109Cu: + cat = OT_SM; + break; + + case 0x104Au: case 0x104Bu: + cat = OT_P; + break; + + case 0xAA74u: case 0xAA75u: case 0xAA76u: + /* https://github.com/harfbuzz/harfbuzz/issues/218 */ + cat = OT_C; + break; + } + + if (cat == OT_M) + { + switch ((int) pos) + { + case POS_PRE_C: cat = (myanmar_category_t) OT_VPre; + pos = POS_PRE_M; break; + case POS_ABOVE_C: cat = (myanmar_category_t) OT_VAbv; break; + case POS_BELOW_C: cat = (myanmar_category_t) OT_VBlw; break; + case POS_POST_C: cat = (myanmar_category_t) OT_VPst; break; + } + } + + info.myanmar_category() = cat; + info.myanmar_position() = pos; +} + + +#endif /* HB_OT_SHAPE_COMPLEX_MYANMAR_HH */ |