1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Copyright © 2011,2012 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_OT_MAXP_TABLE_HH
#define HB_OT_MAXP_TABLE_HH
#include "hb-open-type.hh"
namespace OT {
/*
* maxp -- Maximum Profile
* https://docs.microsoft.com/en-us/typography/opentype/spec/maxp
*/
#define HB_OT_TAG_maxp HB_TAG('m','a','x','p')
struct maxpV1Tail
{
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
HBUINT16 maxPoints; /* Maximum points in a non-composite glyph. */
HBUINT16 maxContours; /* Maximum contours in a non-composite glyph. */
HBUINT16 maxCompositePoints; /* Maximum points in a composite glyph. */
HBUINT16 maxCompositeContours; /* Maximum contours in a composite glyph. */
HBUINT16 maxZones; /* 1 if instructions do not use the twilight zone (Z0),
* or 2 if instructions do use Z0; should be set to 2 in
* most cases. */
HBUINT16 maxTwilightPoints; /* Maximum points used in Z0. */
HBUINT16 maxStorage; /* Number of Storage Area locations. */
HBUINT16 maxFunctionDefs; /* Number of FDEFs, equal to the highest function number + 1. */
HBUINT16 maxInstructionDefs; /* Number of IDEFs. */
HBUINT16 maxStackElements; /* Maximum stack depth. (This includes Font and CVT
* Programs, as well as the instructions for each glyph.) */
HBUINT16 maxSizeOfInstructions; /* Maximum byte count for glyph instructions. */
HBUINT16 maxComponentElements; /* Maximum number of components referenced at
* "top level" for any composite glyph. */
HBUINT16 maxComponentDepth; /* Maximum levels of recursion; 1 for simple components. */
public:
DEFINE_SIZE_STATIC (26);
};
struct maxp
{
static constexpr hb_tag_t tableTag = HB_OT_TAG_maxp;
unsigned int get_num_glyphs () const { return numGlyphs; }
void set_num_glyphs (unsigned int count)
{
numGlyphs = count;
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (unlikely (!c->check_struct (this)))
return_trace (false);
if (version.major == 1)
{
const maxpV1Tail &v1 = StructAfter<maxpV1Tail> (*this);
return_trace (v1.sanitize (c));
}
return_trace (likely (version.major == 0 && version.minor == 0x5000u));
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
maxp *maxp_prime = c->serializer->embed (this);
if (unlikely (!maxp_prime)) return_trace (false);
maxp_prime->numGlyphs = c->plan->num_output_glyphs ();
if (maxp_prime->version.major == 1)
{
const maxpV1Tail *src_v1 = &StructAfter<maxpV1Tail> (*this);
maxpV1Tail *dest_v1 = c->serializer->embed<maxpV1Tail> (src_v1);
if (unlikely (!dest_v1)) return_trace (false);
if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
drop_hint_fields (dest_v1);
}
return_trace (true);
}
static void drop_hint_fields (maxpV1Tail* dest_v1)
{
dest_v1->maxZones = 1;
dest_v1->maxTwilightPoints = 0;
dest_v1->maxStorage = 0;
dest_v1->maxFunctionDefs = 0;
dest_v1->maxInstructionDefs = 0;
dest_v1->maxStackElements = 0;
dest_v1->maxSizeOfInstructions = 0;
}
protected:
FixedVersion<>version;/* Version of the maxp table (0.5 or 1.0),
* 0x00005000u or 0x00010000u. */
HBUINT16 numGlyphs;
/* The number of glyphs in the font. */
/*maxpV1Tail v1Tail[HB_VAR_ARRAY]; */
public:
DEFINE_SIZE_STATIC (6);
};
} /* namespace OT */
#endif /* HB_OT_MAXP_TABLE_HH */
|