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 "UpdateChunk.h" 28 29#include "ArgumentDecoder.h" 30#include "ArgumentEncoder.h" 31#include "Attachment.h" 32#include "WebCoreArgumentCoders.h" 33#include <WebCore/FloatRect.h> 34#include <mach/vm_map.h> 35#include <wtf/RetainPtr.h> 36 37using namespace WebCore; 38 39namespace WebKit { 40 41UpdateChunk::UpdateChunk() 42 : m_data(0) 43 , m_size(0) 44{ 45} 46 47UpdateChunk::UpdateChunk(const IntRect& rect) 48 : m_rect(rect) 49 , m_size(size()) 50{ 51 vm_allocate(mach_task_self(), reinterpret_cast<vm_address_t*>(&m_data), m_size, VM_FLAGS_ANYWHERE); 52} 53 54UpdateChunk::~UpdateChunk() 55{ 56 if (m_data) 57 vm_deallocate(mach_task_self(), reinterpret_cast<vm_address_t>(m_data), m_size); 58} 59 60RetainPtr<CGImageRef> UpdateChunk::createImage() 61{ 62 RetainPtr<CGDataProviderRef> provider(AdoptCF, CGDataProviderCreateWithData(0, m_data, size(), 0)); 63 RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB()); 64 RetainPtr<CGImageRef> image(AdoptCF, CGImageCreate(m_rect.width(), m_rect.height(), 8, 32, m_rect.width() * 4, colorSpace.get(), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host, provider.get(), 0, false, kCGRenderingIntentDefault)); 65 66 return image; 67} 68 69void UpdateChunk::encode(CoreIPC::ArgumentEncoder* encoder) const 70{ 71 encoder->encode(m_rect); 72 encoder->encode(CoreIPC::Attachment(m_data, size(), MACH_MSG_VIRTUAL_COPY, true)); 73 74 m_data = 0; 75} 76 77bool UpdateChunk::decode(CoreIPC::ArgumentDecoder* decoder, UpdateChunk& chunk) 78{ 79 IntRect rect; 80 if (!decoder->decode(rect)) 81 return false; 82 chunk.m_rect = rect; 83 84 CoreIPC::Attachment attachment; 85 if (!decoder->decode(attachment)) 86 return false; 87 88 chunk.m_size = attachment.size(); 89 chunk.m_data = reinterpret_cast<uint8_t*>(attachment.address()); 90 return true; 91} 92 93} // namespace WebKit 94