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/*
* 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 */
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