SkOTTable_EBDT.h revision 058670b1e52910e61d9de294a46b5023ed6dd964 
1/*
2 * Copyright 2014 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 SkOTTable_EBDT_DEFINED
9#define SkOTTable_EBDT_DEFINED
10
11#include "SkEndian.h"
12#include "SkOTTableTypes.h"
13#include "SkOTTable_head.h"
14#include "SkOTTable_loca.h"
15#include "SkTypedEnum.h"
16
17#pragma pack(push, 1)
18
19struct SkOTTableEmbeddedBitmapData {
20    static const SK_OT_CHAR TAG0 = 'E';
21    static const SK_OT_CHAR TAG1 = 'B';
22    static const SK_OT_CHAR TAG2 = 'D';
23    static const SK_OT_CHAR TAG3 = 'T';
24    static const SK_OT_ULONG TAG = SkOTTableTAG<SkOTTableEmbeddedBitmapData>::value;
25
26    SK_OT_Fixed version;
27    static const SK_OT_Fixed version_initial = SkTEndian_SwapBE32(0x00020000);
28
29    struct BigGlyphMetrics {
30        SK_OT_BYTE height;
31        SK_OT_BYTE width;
32        SK_OT_CHAR horiBearingX;
33        SK_OT_CHAR horiBearingY;
34        SK_OT_BYTE horiAdvance;
35        SK_OT_CHAR vertBearingX;
36        SK_OT_CHAR vertBearingY;
37        SK_OT_BYTE vertAdvance;
38    };
39
40    struct SmallGlyphMetrics {
41        SK_OT_BYTE height;
42        SK_OT_BYTE width;
43        SK_OT_CHAR bearingX;
44        SK_OT_CHAR bearingY;
45        SK_OT_BYTE advance;
46    };
47
48    // Small metrics, byte-aligned data.
49    struct Format1 {
50        SmallGlyphMetrics smallGlyphMetrics;
51        //SK_OT_BYTE[] byteAlignedBitmap;
52    };
53
54    // Small metrics, bit-aligned data.
55    struct Format2 {
56        SmallGlyphMetrics smallGlyphMetrics;
57        //SK_OT_BYTE[] bitAlignedBitmap;
58    };
59
60    // Format 3 is not used.
61
62    // EBLC metrics (IndexSubTable::header::indexFormat 2 or 5), compressed data.
63    // Only used on Mac.
64    struct Format4 {
65        SK_OT_ULONG whiteTreeOffset;
66        SK_OT_ULONG blackTreeOffset;
67        SK_OT_ULONG glyphDataOffset;
68    };
69
70    // EBLC metrics (IndexSubTable::header::indexFormat 2 or 5), bit-aligned data.
71    struct Format5 {
72        //SK_OT_BYTE[] bitAlignedBitmap;
73    };
74
75    // Big metrics, byte-aligned data.
76    struct Format6 {
77        BigGlyphMetrics bigGlyphMetrics;
78        //SK_OT_BYTE[] byteAlignedBitmap;
79    };
80
81    // Big metrics, bit-aligned data.
82    struct Format7 {
83        BigGlyphMetrics bigGlyphMetrics;
84        //SK_OT_BYTE[] bitAlignedBitmap;
85    };
86
87    struct EBDTComponent {
88        SK_OT_USHORT glyphCode; // Component glyph code
89        SK_OT_CHAR xOffset; // Position of component left
90        SK_OT_CHAR yOffset; // Position of component top
91    };
92
93    struct Format8 {
94        SmallGlyphMetrics smallMetrics; // Metrics information for the glyph
95        SK_OT_BYTE pad; // Pad to short boundary
96        SK_OT_USHORT numComponents; // Number of components
97        //EBDTComponent componentArray[numComponents]; // Glyph code, offset array
98    };
99
100    struct Format9 {
101        BigGlyphMetrics bigMetrics; // Metrics information for the glyph
102        SK_OT_USHORT numComponents; // Number of components
103        //EBDTComponent componentArray[numComponents]; // Glyph code, offset array
104    };
105};
106
107#pragma pack(pop)
108
109#endif
110