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_AAT_MAP_HH 28 #define HB_AAT_MAP_HH 29 30 #include "hb.hh" 31 32 33 struct hb_aat_map_t 34 { 35 friend struct hb_aat_map_builder_t; 36 37 public: 38 inithb_aat_map_t39 void init () 40 { 41 hb_memset (this, 0, sizeof (*this)); 42 chain_flags.init (); 43 } finihb_aat_map_t44 void fini () { chain_flags.fini (); } 45 46 public: 47 hb_vector_t<hb_mask_t> chain_flags; 48 }; 49 50 struct hb_aat_map_builder_t 51 { 52 public: 53 hb_aat_map_builder_thb_aat_map_builder_t54 HB_INTERNAL hb_aat_map_builder_t (hb_face_t *face_, 55 const hb_segment_properties_t props_) : 56 face (face_), 57 props (props_) {} 58 59 HB_INTERNAL void add_feature (hb_tag_t tag, unsigned int value=1); 60 61 HB_INTERNAL void compile (hb_aat_map_t &m); 62 63 public: 64 struct feature_info_t 65 { 66 hb_aat_layout_feature_type_t type; 67 hb_aat_layout_feature_selector_t setting; 68 bool is_exclusive; 69 unsigned seq; /* For stable sorting only. */ 70 cmphb_aat_map_builder_t::feature_info_t71 HB_INTERNAL static int cmp (const void *pa, const void *pb) 72 { 73 const feature_info_t *a = (const feature_info_t *) pa; 74 const feature_info_t *b = (const feature_info_t *) pb; 75 if (a->type != b->type) return (a->type < b->type ? -1 : 1); 76 if (!a->is_exclusive && 77 (a->setting & ~1) != (b->setting & ~1)) return (a->setting < b->setting ? -1 : 1); 78 return (a->seq < b->seq ? -1 : a->seq > b->seq ? 1 : 0); 79 } 80 81 /* compares type & setting only, not is_exclusive flag or seq number */ cmphb_aat_map_builder_t::feature_info_t82 int cmp (const feature_info_t& f) const 83 { 84 return (f.type != type) ? (f.type < type ? -1 : 1) : 85 (f.setting != setting) ? (f.setting < setting ? -1 : 1) : 0; 86 } 87 }; 88 89 public: 90 hb_face_t *face; 91 hb_segment_properties_t props; 92 93 public: 94 hb_sorted_vector_t<feature_info_t> features; 95 }; 96 97 98 #endif /* HB_AAT_MAP_HH */ 99