| /* |
| * 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 = OT_VPre; break; |
| case POS_BELOW_C: cat = OT_VBlw; break; |
| case POS_ABOVE_C: cat = OT_VAbv; break; |
| case POS_POST_C: cat = OT_VPst; break; |
| default: assert (0); |
| }; |
| |
| info.khmer_category() = cat; |
| } |
| |
| |
| #endif /* HB_OT_SHAPE_COMPLEX_KHMER_HH */ |