/*

 * 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 "UpdateChunk.h"

#include "ArgumentDecoder.h"

#include "ArgumentEncoder.h"

#include "Attachment.h"

#include "WebCoreArgumentCoders.h"

#include <WebCore/FloatRect.h>

#include <mach/vm_map.h>

#include <wtf/RetainPtr.h>

using namespace WebCore;

namespace WebKit {

UpdateChunk::UpdateChunk()

    : m_data(0)

    , m_size(0)

{

}

UpdateChunk::UpdateChunk(const IntRect& rect)

    : m_rect(rect)

    , m_size(size())

{

    vm_allocate(mach_task_self(), reinterpret_cast<vm_address_t*>(&m_data), m_size, VM_FLAGS_ANYWHERE);

}

UpdateChunk::~UpdateChunk()

{

    if (m_data)

        vm_deallocate(mach_task_self(), reinterpret_cast<vm_address_t>(m_data), m_size);

}

RetainPtr<CGImageRef> UpdateChunk::createImage()

{

    RetainPtr<CGDataProviderRef> provider(AdoptCF, CGDataProviderCreateWithData(0, m_data, size(), 0));

    RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB());

    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));

    return image;

}

void UpdateChunk::encode(CoreIPC::ArgumentEncoder& encoder) const

{

    encoder.encode(m_rect);

    encoder.encode(CoreIPC::Attachment(m_data, size(), MACH_MSG_VIRTUAL_COPY, true));

    m_data = 0;

}

bool UpdateChunk::decode(CoreIPC::ArgumentDecoder& decoder, UpdateChunk& chunk)

{

    IntRect rect;

    if (!decoder.decode(rect))

        return false;

    chunk.m_rect = rect;

    CoreIPC::Attachment attachment;

    if (!decoder.decode(attachment))

        return false;

    chunk.m_size = attachment.size();

    chunk.m_data = reinterpret_cast<uint8_t*>(attachment.address());

    return true;

}

} // namespace WebKit