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Diffstat (limited to 'gfx/harfbuzz/src/hb-ot-shape-complex-khmer.hh')
| -rw-r--r-- | gfx/harfbuzz/src/hb-ot-shape-complex-khmer.hh | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-ot-shape-complex-khmer.hh b/gfx/harfbuzz/src/hb-ot-shape-complex-khmer.hh new file mode 100644 index 0000000000..11a77bfd4b --- /dev/null +++ b/gfx/harfbuzz/src/hb-ot-shape-complex-khmer.hh @@ -0,0 +1,113 @@ +/* + * 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_KHMER_HH +#define HB_OT_SHAPE_COMPLEX_KHMER_HH + +#include "hb.hh" + +#include "hb-ot-shape-complex-indic.hh" + + +/* buffer var allocations */ +#define khmer_category() indic_category() /* khmer_category_t */ + + +/* Note: This enum is duplicated in the -machine.rl source file. + * Not sure how to avoid duplication. */ +enum khmer_category_t +{ + OT_Robatic = 20, + OT_Xgroup = 21, + OT_Ygroup = 22, + //OT_VAbv = 26, + //OT_VBlw = 27, + //OT_VPre = 28, + //OT_VPst = 29, +}; + +static inline void +set_khmer_properties (hb_glyph_info_t &info) +{ + hb_codepoint_t u = info.codepoint; + unsigned int type = hb_indic_get_categories (u); + khmer_category_t cat = (khmer_category_t) (type & 0x7Fu); + indic_position_t pos = (indic_position_t) (type >> 8); + + + /* + * Re-assign category + * + * These categories are experimentally extracted from what Uniscribe allows. + */ + switch (u) + { + case 0x179Au: + cat = (khmer_category_t) OT_Ra; + break; + + case 0x17CCu: + case 0x17C9u: + case 0x17CAu: + cat = OT_Robatic; + break; + + case 0x17C6u: + case 0x17CBu: + case 0x17CDu: + case 0x17CEu: + case 0x17CFu: + case 0x17D0u: + case 0x17D1u: + cat = OT_Xgroup; + break; + + case 0x17C7u: + case 0x17C8u: + case 0x17DDu: + case 0x17D3u: /* Just guessing. Uniscribe doesn't categorize it. */ + cat = OT_Ygroup; + break; + } + + /* + * Re-assign position. + */ + if (cat == (khmer_category_t) OT_M) + switch ((int) pos) + { + case POS_PRE_C: cat = (khmer_category_t) OT_VPre; break; + case POS_BELOW_C: cat = (khmer_category_t) OT_VBlw; break; + case POS_ABOVE_C: cat = (khmer_category_t) OT_VAbv; break; + case POS_POST_C: cat = (khmer_category_t) OT_VPst; break; + default: assert (0); + } + + info.khmer_category() = cat; +} + + +#endif /* HB_OT_SHAPE_COMPLEX_KHMER_HH */ |