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
|
/*
* Copyright (C) 2008-2016 Apple Inc. All rights reserved.
* Copyright (C) 2014 Adobe Systems Incorporated. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ImageData.h"
#include "ExceptionCode.h"
#include <runtime/JSCInlines.h>
#include <runtime/TypedArrayInlines.h>
namespace WebCore {
PassRefPtr<ImageData> ImageData::create(unsigned sw, unsigned sh, ExceptionCode& ec)
{
if (!sw || !sh) {
ec = INDEX_SIZE_ERR;
return nullptr;
}
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= sw;
dataSize *= sh;
if (dataSize.hasOverflowed()) {
ec = TypeError;
return nullptr;
}
IntSize size(sw, sh);
RefPtr<ImageData> data = adoptRef(new ImageData(size));
data->data()->zeroFill();
return data.release();
}
PassRefPtr<ImageData> ImageData::create(const IntSize& size)
{
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (dataSize.hasOverflowed())
return 0;
return adoptRef(new ImageData(size));
}
PassRefPtr<ImageData> ImageData::create(const IntSize& size, PassRefPtr<Uint8ClampedArray> byteArray)
{
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (dataSize.hasOverflowed())
return 0;
if (dataSize.unsafeGet() < 0
|| static_cast<unsigned>(dataSize.unsafeGet()) > byteArray->length())
return 0;
return adoptRef(new ImageData(size, byteArray));
}
PassRefPtr<ImageData> ImageData::create(PassRefPtr<Uint8ClampedArray> byteArray, unsigned sw, unsigned sh, ExceptionCode& ec)
{
unsigned length = byteArray->length();
if (!length || length % 4 != 0) {
ec = INVALID_STATE_ERR;
return nullptr;
}
if (!sw) {
ec = INDEX_SIZE_ERR;
return nullptr;
}
length /= 4;
if (length % sw != 0) {
ec = INVALID_STATE_ERR;
return nullptr;
}
unsigned height = length / sw;
if (sh && sh != height) {
ec = INDEX_SIZE_ERR;
return nullptr;
}
return create(IntSize(sw, height), byteArray);
}
ImageData::ImageData(const IntSize& size)
: m_size(size)
, m_data(Uint8ClampedArray::createUninitialized(size.width() * size.height() * 4))
{
ASSERT_WITH_SECURITY_IMPLICATION(m_data);
}
ImageData::ImageData(const IntSize& size, PassRefPtr<Uint8ClampedArray> byteArray)
: m_size(size)
, m_data(byteArray)
{
ASSERT_WITH_SECURITY_IMPLICATION(static_cast<unsigned>(size.width() * size.height() * 4) <= m_data->length());
}
}
|