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