1/*
2 * Copyright 2012 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef SkSFNTHeader_DEFINED
9#define SkSFNTHeader_DEFINED
10
11#include "src/core/SkEndian.h"
12#include "src/sfnt/SkOTTableTypes.h"
13
14//All SK_SFNT_ prefixed types should be considered as big endian.
15typedef uint16_t SK_SFNT_USHORT;
16typedef uint32_t SK_SFNT_ULONG;
17
18#pragma pack(push, 1)
19
20struct SkSFNTHeader {
21 SK_SFNT_ULONG fontType;
22 struct fontType_WindowsTrueType {
23 static const SK_OT_CHAR TAG0 = 0;
24 static const SK_OT_CHAR TAG1 = 1;
25 static const SK_OT_CHAR TAG2 = 0;
26 static const SK_OT_CHAR TAG3 = 0;
27 static const SK_OT_ULONG TAG = SkOTTableTAG<fontType_WindowsTrueType>::value;
28 };
29 struct fontType_MacTrueType {
30 static const SK_OT_CHAR TAG0 = 't';
31 static const SK_OT_CHAR TAG1 = 'r';
32 static const SK_OT_CHAR TAG2 = 'u';
33 static const SK_OT_CHAR TAG3 = 'e';
34 static const SK_OT_ULONG TAG = SkOTTableTAG<fontType_MacTrueType>::value;
35 };
36 struct fontType_PostScript {
37 static const SK_OT_CHAR TAG0 = 't';
38 static const SK_OT_CHAR TAG1 = 'y';
39 static const SK_OT_CHAR TAG2 = 'p';
40 static const SK_OT_CHAR TAG3 = '1';
41 static const SK_OT_ULONG TAG = SkOTTableTAG<fontType_PostScript>::value;
42 };
43 struct fontType_OpenTypeCFF {
44 static const SK_OT_CHAR TAG0 = 'O';
45 static const SK_OT_CHAR TAG1 = 'T';
46 static const SK_OT_CHAR TAG2 = 'T';
47 static const SK_OT_CHAR TAG3 = 'O';
48 static const SK_OT_ULONG TAG = SkOTTableTAG<fontType_OpenTypeCFF>::value;
49 };
50
51 SK_SFNT_USHORT numTables;
52 SK_SFNT_USHORT searchRange;
53 SK_SFNT_USHORT entrySelector;
54 SK_SFNT_USHORT rangeShift;
55
56 struct TableDirectoryEntry {
57 SK_SFNT_ULONG tag;
58 SK_SFNT_ULONG checksum;
59 SK_SFNT_ULONG offset; //From beginning of header.
60 SK_SFNT_ULONG logicalLength;
61 }; //tableDirectoryEntries[numTables]
62};
63
64#pragma pack(pop)
65
66
67static_assert(sizeof(SkSFNTHeader) == 12, "sizeof_SkSFNTHeader_not_12");
68static_assert(sizeof(SkSFNTHeader::TableDirectoryEntry) == 16, "sizeof_SkSFNTHeader_TableDirectoryEntry_not_16");
69
70#endif
71