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
|
/*
* Copyright 2011 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef TYPOGRAPHY_FONT_SFNTLY_SRC_SFNTLY_DATA_FONT_DATA_H_
#define TYPOGRAPHY_FONT_SFNTLY_SRC_SFNTLY_DATA_FONT_DATA_H_
#include <vector>
#include "sfntly/port/type.h"
#include "sfntly/data/byte_array.h"
#include "sfntly/port/refcount.h"
namespace sfntly {
struct DataSize {
enum {
kBYTE = 1,
kCHAR = 1,
kUSHORT = 2,
kSHORT = 2,
kUINT24 = 3,
kULONG = 4,
kLONG = 4,
kFixed = 4,
kFUNIT = 4,
kFWORD = 2,
kUFWORD = 2,
kF2DOT14 = 2,
kLONGDATETIME = 8,
kTag = 4,
kGlyphID = 2,
kOffset = 2
};
};
class FontData : virtual public RefCount {
public:
// Gets the maximum size of the FontData. This is the maximum number of bytes
// that the font data can hold and all of it may not be filled with data or
// even fully allocated yet.
// @return the maximum size of this font data
virtual int32_t Size() const;
// Sets limits on the size of the FontData. The FontData is then only
// visible within the bounds set.
// @param offset the start of the new bounds
// @param length the number of bytes in the bounded array
// @return true if the bounding range was successful; false otherwise
virtual bool Bound(int32_t offset, int32_t length);
// Sets limits on the size of the FontData. This is a offset bound only so if
// the FontData is writable and growable then there is no limit to that growth
// from the bounding operation.
// @param offset the start of the new bounds which must be within the current
// size of the FontData
// @return true if the bounding range was successful; false otherwise
virtual bool Bound(int32_t offset);
// Makes a slice of this FontData. The returned slice will share the data with
// the original <code>FontData</code>.
// @param offset the start of the slice
// @param length the number of bytes in the slice
// @return a slice of the original FontData
virtual CALLER_ATTACH FontData* Slice(int32_t offset, int32_t length) = 0;
// Makes a bottom bound only slice of this array. The returned slice will
// share the data with the original <code>FontData</code>.
// @param offset the start of the slice
// @return a slice of the original FontData
virtual CALLER_ATTACH FontData* Slice(int32_t offset) = 0;
// Gets the length of the data.
virtual int32_t Length() const;
protected:
// Constructor.
// @param ba the byte array to use for the backing data
explicit FontData(ByteArray* ba);
// Constructor.
// @param data the data to wrap
// @param offset the offset to start the wrap from
// @param length the length of the data wrapped
FontData(FontData* data, int32_t offset, int32_t length);
// Constructor.
// @param data the data to wrap
// @param offset the offset to start the wrap from
FontData(FontData* data, int32_t offset);
virtual ~FontData();
void Init(ByteArray* ba);
// Gets the offset in the underlying data taking into account any bounds on
// the data.
// @param offset the offset to get the bound compensated offset for
// @return the bound compensated offset
int32_t BoundOffset(int32_t offset);
// Gets the length in the underlying data taking into account any bounds on the data.
// @param offset the offset that the length is being used at
// @param length the length to get the bound compensated length for
// @return the bound compensated length
int32_t BoundLength(int32_t offset, int32_t length);
// TODO(arthurhsu): style guide violation: refactor this protected member
ByteArrayPtr array_;
private:
int32_t bound_offset_;
int32_t bound_length_;
};
typedef Ptr<FontData> FontDataPtr;
} // namespace sfntly
#endif // TYPOGRAPHY_FONT_SFNTLY_SRC_SFNTLY_DATA_FONT_DATA_H_
|
