1 /* 2 * Copyright © 2018 Google, Inc. 3 * 4 * This is part of HarfBuzz, a text shaping library. 5 * 6 * Permission is hereby granted, without written agreement and without 7 * license or royalty fees, to use, copy, modify, and distribute this 8 * software and its documentation for any purpose, provided that the 9 * above copyright notice and the following two paragraphs appear in 10 * all copies of this software. 11 * 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16 * DAMAGE. 17 * 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23 * 24 * Google Author(s): Behdad Esfahbod 25 */ 26 27 #ifndef HB_OT_SHAPE_COMPLEX_KHMER_HH 28 #define HB_OT_SHAPE_COMPLEX_KHMER_HH 29 30 #include "hb.hh" 31 32 #include "hb-ot-shape-complex-indic.hh" 33 34 35 /* buffer var allocations */ 36 #define khmer_category() indic_category() /* khmer_category_t */ 37 38 39 /* Note: This enum is duplicated in the -machine.rl source file. 40 * Not sure how to avoid duplication. */ 41 enum khmer_category_t 42 { 43 OT_Robatic = 20, 44 OT_Xgroup = 21, 45 OT_Ygroup = 22, 46 47 OT_VAbv = 26, 48 OT_VBlw = 27, 49 OT_VPre = 28, 50 OT_VPst = 29, 51 }; 52 53 static inline void 54 set_khmer_properties (hb_glyph_info_t &info) 55 { 56 hb_codepoint_t u = info.codepoint; 57 unsigned int type = hb_indic_get_categories (u); 58 khmer_category_t cat = (khmer_category_t) (type & 0x7Fu); 59 indic_position_t pos = (indic_position_t) (type >> 8); 60 61 62 /* 63 * Re-assign category 64 * 65 * These categories are experimentally extracted from what Uniscribe allows. 66 */ 67 switch (u) 68 { 69 case 0x179Au: 70 cat = (khmer_category_t) OT_Ra; 71 break; 72 73 case 0x17CCu: 74 case 0x17C9u: 75 case 0x17CAu: 76 cat = OT_Robatic; 77 break; 78 79 case 0x17C6u: 80 case 0x17CBu: 81 case 0x17CDu: 82 case 0x17CEu: 83 case 0x17CFu: 84 case 0x17D0u: 85 case 0x17D1u: 86 cat = OT_Xgroup; 87 break; 88 89 case 0x17C7u: 90 case 0x17C8u: 91 case 0x17DDu: 92 case 0x17D3u: /* Just guessing. Uniscribe doesn't categorize it. */ 93 cat = OT_Ygroup; 94 break; 95 } 96 97 /* 98 * Re-assign position. 99 */ 100 if (cat == (khmer_category_t) OT_M) 101 switch ((int) pos) 102 { 103 case POS_PRE_C: cat = OT_VPre; break; 104 case POS_BELOW_C: cat = OT_VBlw; break; 105 case POS_ABOVE_C: cat = OT_VAbv; break; 106 case POS_POST_C: cat = OT_VPst; break; 107 default: assert (0); 108 }; 109 110 info.khmer_category() = cat; 111 } 112 113 114 #endif /* HB_OT_SHAPE_COMPLEX_KHMER_HH */