1/* 2 * Copyright (C) 2010 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "ShareableBitmap.h" 28 29#include "SharedMemory.h" 30#include "WebCoreArgumentCoders.h" 31#include <WebCore/GraphicsContext.h> 32 33using namespace WebCore; 34 35namespace WebKit { 36 37ShareableBitmap::Handle::Handle() 38 : m_flags(0) 39{ 40} 41 42void ShareableBitmap::Handle::encode(IPC::ArgumentEncoder& encoder) const 43{ 44 encoder << m_handle; 45 encoder << m_size; 46 encoder << m_flags; 47} 48 49bool ShareableBitmap::Handle::decode(IPC::ArgumentDecoder& decoder, Handle& handle) 50{ 51 if (!decoder.decode(handle.m_handle)) 52 return false; 53 if (!decoder.decode(handle.m_size)) 54 return false; 55 if (!decoder.decode(handle.m_flags)) 56 return false; 57 return true; 58} 59 60void ShareableBitmap::Handle::clear() 61{ 62 m_handle.clear(); 63 m_size = IntSize(); 64 m_flags = Flag::NoFlags; 65} 66 67PassRefPtr<ShareableBitmap> ShareableBitmap::create(const IntSize& size, Flags flags) 68{ 69 size_t numBytes = numBytesForSize(size); 70 71 void* data = 0; 72 if (!tryFastMalloc(numBytes).getValue(data)) 73 return nullptr; 74 75 return adoptRef(new ShareableBitmap(size, flags, data)); 76} 77 78PassRefPtr<ShareableBitmap> ShareableBitmap::createShareable(const IntSize& size, Flags flags) 79{ 80 size_t numBytes = numBytesForSize(size); 81 82 RefPtr<SharedMemory> sharedMemory = SharedMemory::create(numBytes); 83 if (!sharedMemory) 84 return nullptr; 85 86 return adoptRef(new ShareableBitmap(size, flags, sharedMemory)); 87} 88 89PassRefPtr<ShareableBitmap> ShareableBitmap::create(const IntSize& size, Flags flags, PassRefPtr<SharedMemory> sharedMemory) 90{ 91 ASSERT(sharedMemory); 92 93 size_t numBytes = numBytesForSize(size); 94 ASSERT_UNUSED(numBytes, sharedMemory->size() >= numBytes); 95 96 return adoptRef(new ShareableBitmap(size, flags, sharedMemory)); 97} 98 99PassRefPtr<ShareableBitmap> ShareableBitmap::create(const Handle& handle, SharedMemory::Protection protection) 100{ 101 // Create the shared memory. 102 RefPtr<SharedMemory> sharedMemory = SharedMemory::create(handle.m_handle, protection); 103 if (!sharedMemory) 104 return nullptr; 105 106 return create(handle.m_size, handle.m_flags, sharedMemory.release()); 107} 108 109bool ShareableBitmap::createHandle(Handle& handle, SharedMemory::Protection protection) 110{ 111 ASSERT(isBackedBySharedMemory()); 112 113 if (!m_sharedMemory->createHandle(handle.m_handle, protection)) 114 return false; 115 handle.m_size = m_size; 116 handle.m_flags = m_flags; 117 return true; 118} 119 120ShareableBitmap::ShareableBitmap(const IntSize& size, Flags flags, void* data) 121 : m_size(size) 122 , m_flags(flags) 123 , m_data(data) 124{ 125} 126 127ShareableBitmap::ShareableBitmap(const IntSize& size, Flags flags, PassRefPtr<SharedMemory> sharedMemory) 128 : m_size(size) 129 , m_flags(flags) 130 , m_sharedMemory(sharedMemory) 131 , m_data(0) 132{ 133} 134 135ShareableBitmap::~ShareableBitmap() 136{ 137 if (!isBackedBySharedMemory()) 138 fastFree(m_data); 139} 140 141bool ShareableBitmap::resize(const IntSize& size) 142{ 143 // We can't resize backing stores that are backed by shared memory. 144 ASSERT(!isBackedBySharedMemory()); 145 146 if (size == m_size) 147 return true; 148 149 size_t newNumBytes = numBytesForSize(size); 150 151 // Try to resize. 152 char* newData = 0; 153 if (!tryFastRealloc(m_data, newNumBytes).getValue(newData)) { 154 // We failed, but the backing store is still kept in a consistent state. 155 return false; 156 } 157 158 m_size = size; 159 m_data = newData; 160 161 return true; 162} 163 164void* ShareableBitmap::data() const 165{ 166 if (isBackedBySharedMemory()) 167 return m_sharedMemory->data(); 168 169 ASSERT(m_data); 170 return m_data; 171} 172 173} // namespace WebKit 174