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comparison mupdf-source/thirdparty/harfbuzz/src/hb-subset-accelerator.hh @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
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 {
49 static hb_user_data_key_t* user_data_key()
50 {
51 return &_hb_subset_accelerator_user_data_key;
52 }
53
54 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
65 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
80 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
88 ~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
111 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 */