114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
/*
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* Copyright © 2018 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_SHAPE_COMPLEX_KHMER_HH
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#define HB_OT_SHAPE_COMPLEX_KHMER_HH
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#include "hb.hh"
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#include "hb-ot-shape-complex-indic.hh"
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/* buffer var allocations */
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#define khmer_category() indic_category() /* khmer_category_t */
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/* Note: This enum is duplicated in the -machine.rl source file.
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* Not sure how to avoid duplication. */
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enum khmer_category_t
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{
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OT_Robatic = 20,
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OT_Xgroup = 21,
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OT_Ygroup = 22,
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//OT_VAbv = 26,
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//OT_VBlw = 27,
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//OT_VPre = 28,
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//OT_VPst = 29,
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};
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static inline void
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set_khmer_properties (hb_glyph_info_t &info)
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{
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hb_codepoint_t u = info.codepoint;
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unsigned int type = hb_indic_get_categories (u);
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khmer_category_t cat = (khmer_category_t) (type & 0x7Fu);
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indic_position_t pos = (indic_position_t) (type >> 8);
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/*
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* Re-assign category
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*
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* These categories are experimentally extracted from what Uniscribe allows.
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*/
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switch (u)
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{
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case 0x179Au:
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cat = (khmer_category_t) OT_Ra;
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break;
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case 0x17CCu:
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case 0x17C9u:
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case 0x17CAu:
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cat = OT_Robatic;
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break;
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case 0x17C6u:
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case 0x17CBu:
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case 0x17CDu:
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case 0x17CEu:
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case 0x17CFu:
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case 0x17D0u:
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case 0x17D1u:
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cat = OT_Xgroup;
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break;
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case 0x17C7u:
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case 0x17C8u:
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case 0x17DDu:
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case 0x17D3u: /* Just guessing. Uniscribe doesn't categorize it. */
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cat = OT_Ygroup;
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break;
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}
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/*
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* Re-assign position.
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*/
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if (cat == (khmer_category_t) OT_M)
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switch ((int) pos)
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{
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case POS_PRE_C: cat = (khmer_category_t) OT_VPre; break;
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case POS_BELOW_C: cat = (khmer_category_t) OT_VBlw; break;
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case POS_ABOVE_C: cat = (khmer_category_t) OT_VAbv; break;
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case POS_POST_C: cat = (khmer_category_t) OT_VPst; break;
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default: assert (0);
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}
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info.khmer_category() = cat;
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}
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#endif /* HB_OT_SHAPE_COMPLEX_KHMER_HH */
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