1 /* 2 * Copyright © 2022 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): Garret Rieger 25 */ 26 27 #ifndef HB_SUBSET_ACCELERATOR_HH 28 #define HB_SUBSET_ACCELERATOR_HH 29 30 31 #include "hb.hh" 32 33 #include "hb-map.hh" 34 #include "hb-multimap.hh" 35 #include "hb-set.hh" 36 37 extern HB_INTERNAL hb_user_data_key_t _hb_subset_accelerator_user_data_key; 38 39 namespace CFF { 40 struct cff_subset_accelerator_t; 41 } 42 43 namespace OT { 44 struct SubtableUnicodesCache; 45 }; 46 47 struct hb_subset_accelerator_t 48 { user_data_keyhb_subset_accelerator_t49 static hb_user_data_key_t* user_data_key() 50 { 51 return &_hb_subset_accelerator_user_data_key; 52 } 53 createhb_subset_accelerator_t54 static hb_subset_accelerator_t* create(const hb_map_t& unicode_to_gid_, 55 const hb_multimap_t gid_to_unicodes_, 56 const hb_set_t& unicodes_, 57 bool has_seac_) { 58 hb_subset_accelerator_t* accel = 59 (hb_subset_accelerator_t*) hb_malloc (sizeof(hb_subset_accelerator_t)); 60 new (accel) hb_subset_accelerator_t (unicode_to_gid_, gid_to_unicodes_, unicodes_); 61 accel->has_seac = has_seac_; 62 return accel; 63 } 64 destroyhb_subset_accelerator_t65 static void destroy(void* value) { 66 if (!value) return; 67 68 hb_subset_accelerator_t* accel = (hb_subset_accelerator_t*) value; 69 70 if (accel->cff_accelerator && accel->destroy_cff_accelerator) 71 accel->destroy_cff_accelerator ((void*) accel->cff_accelerator); 72 73 if (accel->cmap_cache && accel->destroy_cmap_cache) 74 accel->destroy_cmap_cache ((void*) accel->cmap_cache); 75 76 accel->~hb_subset_accelerator_t (); 77 hb_free (accel); 78 } 79 hb_subset_accelerator_thb_subset_accelerator_t80 hb_subset_accelerator_t (const hb_map_t& unicode_to_gid_, 81 const hb_multimap_t& gid_to_unicodes_, 82 const hb_set_t& unicodes_) 83 : unicode_to_gid(unicode_to_gid_), gid_to_unicodes (gid_to_unicodes_), unicodes(unicodes_), 84 cmap_cache(nullptr), destroy_cmap_cache(nullptr), 85 has_seac(false), cff_accelerator(nullptr), destroy_cff_accelerator(nullptr) 86 { sanitized_table_cache_lock.init (); } 87 ~hb_subset_accelerator_thb_subset_accelerator_t88 ~hb_subset_accelerator_t () 89 { sanitized_table_cache_lock.fini (); } 90 91 // Generic 92 93 mutable hb_mutex_t sanitized_table_cache_lock; 94 mutable hb_hashmap_t<hb_tag_t, hb::unique_ptr<hb_blob_t>> sanitized_table_cache; 95 96 const hb_map_t unicode_to_gid; 97 const hb_multimap_t gid_to_unicodes; 98 const hb_set_t unicodes; 99 100 // cmap 101 const OT::SubtableUnicodesCache* cmap_cache; 102 hb_destroy_func_t destroy_cmap_cache; 103 104 // CFF 105 bool has_seac; 106 const CFF::cff_subset_accelerator_t* cff_accelerator; 107 hb_destroy_func_t destroy_cff_accelerator; 108 109 // TODO(garretrieger): cumulative glyf checksum map 110 in_errorhb_subset_accelerator_t111 bool in_error () const 112 { 113 return unicode_to_gid.in_error () || 114 gid_to_unicodes.in_error () || 115 unicodes.in_error () || 116 sanitized_table_cache.in_error (); 117 } 118 }; 119 120 121 #endif /* HB_SUBSET_ACCELERATOR_HH */ 122