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comparison mupdf-source/thirdparty/harfbuzz/src/hb-ot-maxp-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 © 2011,2012 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_MAXP_TABLE_HH
28 #define HB_OT_MAXP_TABLE_HH
29
30 #include "hb-open-type.hh"
31
32 namespace OT {
33
34
35 /*
36 * maxp -- Maximum Profile
37 * https://docs.microsoft.com/en-us/typography/opentype/spec/maxp
38 */
39
40 #define HB_OT_TAG_maxp HB_TAG('m','a','x','p')
41
42 struct maxpV1Tail
43 {
44 bool sanitize (hb_sanitize_context_t *c) const
45 {
46 TRACE_SANITIZE (this);
47 return_trace (c->check_struct (this));
48 }
49
50 HBUINT16 maxPoints; /* Maximum points in a non-composite glyph. */
51 HBUINT16 maxContours; /* Maximum contours in a non-composite glyph. */
52 HBUINT16 maxCompositePoints; /* Maximum points in a composite glyph. */
53 HBUINT16 maxCompositeContours; /* Maximum contours in a composite glyph. */
54 HBUINT16 maxZones; /* 1 if instructions do not use the twilight zone (Z0),
55 * or 2 if instructions do use Z0; should be set to 2 in
56 * most cases. */
57 HBUINT16 maxTwilightPoints; /* Maximum points used in Z0. */
58 HBUINT16 maxStorage; /* Number of Storage Area locations. */
59 HBUINT16 maxFunctionDefs; /* Number of FDEFs, equal to the highest function number + 1. */
60 HBUINT16 maxInstructionDefs; /* Number of IDEFs. */
61 HBUINT16 maxStackElements; /* Maximum stack depth. (This includes Font and CVT
62 * Programs, as well as the instructions for each glyph.) */
63 HBUINT16 maxSizeOfInstructions; /* Maximum byte count for glyph instructions. */
64 HBUINT16 maxComponentElements; /* Maximum number of components referenced at
65 * "top level" for any composite glyph. */
66 HBUINT16 maxComponentDepth; /* Maximum levels of recursion; 1 for simple components. */
67 public:
68 DEFINE_SIZE_STATIC (26);
69 };
70
71
72 struct maxp
73 {
74 static constexpr hb_tag_t tableTag = HB_OT_TAG_maxp;
75
76 unsigned int get_num_glyphs () const { return numGlyphs; }
77
78 void set_num_glyphs (unsigned int count)
79 {
80 numGlyphs = count;
81 }
82
83 bool sanitize (hb_sanitize_context_t *c) const
84 {
85 TRACE_SANITIZE (this);
86 if (unlikely (!c->check_struct (this)))
87 return_trace (false);
88
89 if (version.major == 1)
90 {
91 const maxpV1Tail &v1 = StructAfter<maxpV1Tail> (*this);
92 return_trace (v1.sanitize (c));
93 }
94 return_trace (likely (version.major == 0 && version.minor == 0x5000u));
95 }
96
97 bool subset (hb_subset_context_t *c) const
98 {
99 TRACE_SUBSET (this);
100 maxp *maxp_prime = c->serializer->embed (this);
101 if (unlikely (!maxp_prime)) return_trace (false);
102
103 maxp_prime->numGlyphs = c->plan->num_output_glyphs ();
104 if (maxp_prime->version.major == 1)
105 {
106 const maxpV1Tail *src_v1 = &StructAfter<maxpV1Tail> (*this);
107 maxpV1Tail *dest_v1 = c->serializer->embed<maxpV1Tail> (src_v1);
108 if (unlikely (!dest_v1)) return_trace (false);
109
110 if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
111 drop_hint_fields (dest_v1);
112 }
113
114 return_trace (true);
115 }
116
117 static void drop_hint_fields (maxpV1Tail* dest_v1)
118 {
119 dest_v1->maxZones = 1;
120 dest_v1->maxTwilightPoints = 0;
121 dest_v1->maxStorage = 0;
122 dest_v1->maxFunctionDefs = 0;
123 dest_v1->maxInstructionDefs = 0;
124 dest_v1->maxStackElements = 0;
125 dest_v1->maxSizeOfInstructions = 0;
126 }
127
128 protected:
129 FixedVersion<>version;/* Version of the maxp table (0.5 or 1.0),
130 * 0x00005000u or 0x00010000u. */
131 HBUINT16 numGlyphs;
132 /* The number of glyphs in the font. */
133 /*maxpV1Tail v1Tail[HB_VAR_ARRAY]; */
134 public:
135 DEFINE_SIZE_STATIC (6);
136 };
137
138
139 } /* namespace OT */
140
141
142 #endif /* HB_OT_MAXP_TABLE_HH */