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comparison mupdf-source/thirdparty/harfbuzz/src/hb-ot-var-mvar-table.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 © 2017 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_VAR_MVAR_TABLE_HH
28 #define HB_OT_VAR_MVAR_TABLE_HH
29
30 #include "hb-ot-layout-common.hh"
31
32
33 namespace OT {
34
35
36 struct VariationValueRecord
37 {
38 bool sanitize (hb_sanitize_context_t *c) const
39 {
40 TRACE_SANITIZE (this);
41 return_trace (c->check_struct (this));
42 }
43
44 public:
45 Tag valueTag; /* Four-byte tag identifying a font-wide measure. */
46 VarIdx varIdx; /* Outer/inner index into VariationStore item. */
47
48 public:
49 DEFINE_SIZE_STATIC (8);
50 };
51
52
53 /*
54 * MVAR -- Metrics Variations
55 * https://docs.microsoft.com/en-us/typography/opentype/spec/mvar
56 */
57 #define HB_OT_TAG_MVAR HB_TAG('M','V','A','R')
58
59 struct MVAR
60 {
61 static constexpr hb_tag_t tableTag = HB_OT_TAG_MVAR;
62
63 bool sanitize (hb_sanitize_context_t *c) const
64 {
65 TRACE_SANITIZE (this);
66 return_trace (version.sanitize (c) &&
67 likely (version.major == 1) &&
68 c->check_struct (this) &&
69 valueRecordSize >= VariationValueRecord::static_size &&
70 varStore.sanitize (c, this) &&
71 c->check_range (valuesZ.arrayZ,
72 valueRecordCount,
73 valueRecordSize));
74 }
75
76 float get_var (hb_tag_t tag,
77 const int *coords, unsigned int coord_count) const
78 {
79 const VariationValueRecord *record;
80 record = (VariationValueRecord *) hb_bsearch (tag,
81 (const VariationValueRecord *)
82 (const HBUINT8 *) valuesZ,
83 valueRecordCount, valueRecordSize,
84 tag_compare);
85 if (!record)
86 return 0.;
87
88 return (this+varStore).get_delta (record->varIdx, coords, coord_count);
89 }
90
91 protected:
92 static int tag_compare (const void *pa, const void *pb)
93 {
94 const hb_tag_t *a = (const hb_tag_t *) pa;
95 const Tag *b = (const Tag *) pb;
96 return b->cmp (*a);
97 }
98
99 protected:
100 FixedVersion<>version; /* Version of the metrics variation table
101 * initially set to 0x00010000u */
102 HBUINT16 reserved; /* Not used; set to 0. */
103 HBUINT16 valueRecordSize;/* The size in bytes of each value record —
104 * must be greater than zero. */
105 HBUINT16 valueRecordCount;/* The number of value records — may be zero. */
106 Offset16To<VariationStore>
107 varStore; /* Offset to item variation store table. */
108 UnsizedArrayOf<HBUINT8>
109 valuesZ; /* Array of value records. The records must be
110 * in binary order of their valueTag field. */
111
112 public:
113 DEFINE_SIZE_ARRAY (12, valuesZ);
114 };
115
116 } /* namespace OT */
117
118
119 #endif /* HB_OT_VAR_MVAR_TABLE_HH */