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
|
/*
* Copyright (C) 2010 Apple Inc. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 "ShareableBitmap.h"
#include "SharedMemory.h"
#include <WebCore/GraphicsContext.h>
using namespace WebCore;
namespace WebKit {
PassRefPtr<ShareableBitmap> ShareableBitmap::create(const WebCore::IntSize& size)
{
size_t numBytes = numBytesForSize(size);
void* data = 0;
if (!tryFastMalloc(numBytes).getValue(data))
return 0;
return adoptRef(new ShareableBitmap(size, data));
}
PassRefPtr<ShareableBitmap> ShareableBitmap::createShareable(const IntSize& size)
{
size_t numBytes = numBytesForSize(size);
RefPtr<SharedMemory> sharedMemory = SharedMemory::create(numBytes);
if (!sharedMemory)
return 0;
return adoptRef(new ShareableBitmap(size, sharedMemory));
}
PassRefPtr<ShareableBitmap> ShareableBitmap::create(const WebCore::IntSize& size, const SharedMemory::Handle& handle)
{
// Create the shared memory.
RefPtr<SharedMemory> sharedMemory = SharedMemory::create(handle, SharedMemory::ReadWrite);
if (!sharedMemory)
return 0;
size_t numBytes = numBytesForSize(size);
ASSERT_UNUSED(numBytes, sharedMemory->size() >= numBytes);
return adoptRef(new ShareableBitmap(size, sharedMemory));
}
bool ShareableBitmap::createHandle(SharedMemory::Handle& handle)
{
ASSERT(isBackedBySharedMemory());
return m_sharedMemory->createHandle(handle, SharedMemory::ReadWrite);
}
ShareableBitmap::ShareableBitmap(const IntSize& size, void* data)
: m_size(size)
, m_data(data)
{
}
ShareableBitmap::ShareableBitmap(const IntSize& size, PassRefPtr<SharedMemory> sharedMemory)
: m_size(size)
, m_sharedMemory(sharedMemory)
, m_data(0)
{
}
ShareableBitmap::~ShareableBitmap()
{
if (!isBackedBySharedMemory())
fastFree(m_data);
}
bool ShareableBitmap::resize(const IntSize& size)
{
// We can't resize backing stores that are backed by shared memory.
ASSERT(!isBackedBySharedMemory());
if (size == m_size)
return true;
size_t newNumBytes = numBytesForSize(size);
// Try to resize.
char* newData = 0;
if (!tryFastRealloc(m_data, newNumBytes).getValue(newData)) {
// We failed, but the backing store is still kept in a consistent state.
return false;
}
m_size = size;
m_data = newData;
return true;
}
void* ShareableBitmap::data() const
{
if (isBackedBySharedMemory())
return m_sharedMemory->data();
ASSERT(m_data);
return m_data;
}
} // namespace WebKit
|
