2 * Copyright (C) 2010 Apple Inc. All rights reserved.
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27 #include "ShareableBitmap.h"
29 #include "SharedMemory.h"
30 #include <WebCore/GraphicsContext.h>
32 using namespace WebCore;
36 PassRefPtr<ShareableBitmap> ShareableBitmap::create(const WebCore::IntSize& size)
38 size_t numBytes = numBytesForSize(size);
41 if (!tryFastMalloc(numBytes).getValue(data))
44 return adoptRef(new ShareableBitmap(size, data));
47 PassRefPtr<ShareableBitmap> ShareableBitmap::createShareable(const IntSize& size)
49 size_t numBytes = numBytesForSize(size);
51 RefPtr<SharedMemory> sharedMemory = SharedMemory::create(numBytes);
55 return adoptRef(new ShareableBitmap(size, sharedMemory));
58 PassRefPtr<ShareableBitmap> ShareableBitmap::create(const WebCore::IntSize& size, const SharedMemory::Handle& handle)
60 // Create the shared memory.
61 RefPtr<SharedMemory> sharedMemory = SharedMemory::create(handle, SharedMemory::ReadWrite);
65 size_t numBytes = numBytesForSize(size);
66 ASSERT_UNUSED(numBytes, sharedMemory->size() >= numBytes);
68 return adoptRef(new ShareableBitmap(size, sharedMemory));
71 bool ShareableBitmap::createHandle(SharedMemory::Handle& handle)
73 ASSERT(isBackedBySharedMemory());
75 return m_sharedMemory->createHandle(handle, SharedMemory::ReadWrite);
78 ShareableBitmap::ShareableBitmap(const IntSize& size, void* data)
84 ShareableBitmap::ShareableBitmap(const IntSize& size, PassRefPtr<SharedMemory> sharedMemory)
86 , m_sharedMemory(sharedMemory)
91 ShareableBitmap::~ShareableBitmap()
93 if (!isBackedBySharedMemory())
97 bool ShareableBitmap::resize(const IntSize& size)
99 // We can't resize backing stores that are backed by shared memory.
100 ASSERT(!isBackedBySharedMemory());
105 size_t newNumBytes = numBytesForSize(size);
109 if (!tryFastRealloc(m_data, newNumBytes).getValue(newData)) {
110 // We failed, but the backing store is still kept in a consistent state.
120 void* ShareableBitmap::data() const
122 if (isBackedBySharedMemory())
123 return m_sharedMemory->data();
129 } // namespace WebKit