michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef SkSFNTHeader_DEFINED
michael@0: #define SkSFNTHeader_DEFINED
michael@0: 
michael@0: #include "SkEndian.h"
michael@0: #include "SkOTTableTypes.h"
michael@0: 
michael@0: //All SK_SFNT_ prefixed types should be considered as big endian.
michael@0: typedef uint16_t SK_SFNT_USHORT;
michael@0: typedef uint32_t SK_SFNT_ULONG;
michael@0: 
michael@0: #pragma pack(push, 1)
michael@0: 
michael@0: struct SkSFNTHeader {
michael@0:     SK_SFNT_ULONG fontType;
michael@0:     struct fontType_WindowsTrueType {
michael@0:         static const SK_OT_CHAR TAG0 = 0;
michael@0:         static const SK_OT_CHAR TAG1 = 1;
michael@0:         static const SK_OT_CHAR TAG2 = 0;
michael@0:         static const SK_OT_CHAR TAG3 = 0;
michael@0:         static const SK_OT_ULONG TAG = SkOTTableTAG<fontType_WindowsTrueType>::value;
michael@0:     };
michael@0:     struct fontType_MacTrueType {
michael@0:         static const SK_OT_CHAR TAG0 = 't';
michael@0:         static const SK_OT_CHAR TAG1 = 'r';
michael@0:         static const SK_OT_CHAR TAG2 = 'u';
michael@0:         static const SK_OT_CHAR TAG3 = 'e';
michael@0:         static const SK_OT_ULONG TAG = SkOTTableTAG<fontType_MacTrueType>::value;
michael@0:     };
michael@0:     struct fontType_PostScript {
michael@0:         static const SK_OT_CHAR TAG0 = 't';
michael@0:         static const SK_OT_CHAR TAG1 = 'y';
michael@0:         static const SK_OT_CHAR TAG2 = 'p';
michael@0:         static const SK_OT_CHAR TAG3 = '1';
michael@0:         static const SK_OT_ULONG TAG = SkOTTableTAG<fontType_PostScript>::value;
michael@0:     };
michael@0:     struct fontType_OpenTypeCFF {
michael@0:         static const SK_OT_CHAR TAG0 = 'O';
michael@0:         static const SK_OT_CHAR TAG1 = 'T';
michael@0:         static const SK_OT_CHAR TAG2 = 'T';
michael@0:         static const SK_OT_CHAR TAG3 = 'O';
michael@0:         static const SK_OT_ULONG TAG = SkOTTableTAG<fontType_OpenTypeCFF>::value;
michael@0:     };
michael@0: 
michael@0:     SK_SFNT_USHORT numTables;
michael@0:     SK_SFNT_USHORT searchRange;
michael@0:     SK_SFNT_USHORT entrySelector;
michael@0:     SK_SFNT_USHORT rangeShift;
michael@0: 
michael@0:     struct TableDirectoryEntry {
michael@0:         SK_SFNT_ULONG tag;
michael@0:         SK_SFNT_ULONG checksum;
michael@0:         SK_SFNT_ULONG offset; //From beginning of header.
michael@0:         SK_SFNT_ULONG logicalLength;
michael@0:     }; //tableDirectoryEntries[numTables]
michael@0: };
michael@0: 
michael@0: #pragma pack(pop)
michael@0: 
michael@0: 
michael@0: SK_COMPILE_ASSERT(sizeof(SkSFNTHeader) == 12, sizeof_SkSFNTHeader_not_12);
michael@0: SK_COMPILE_ASSERT(sizeof(SkSFNTHeader::TableDirectoryEntry) == 16, sizeof_SkSFNTHeader_TableDirectoryEntry_not_16);
michael@0: 
michael@0: #endif