/*

 * 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 "WebCoreArgumentCoders.h"

using namespace WebCore;

namespace WebKit {

UpdateChunk::UpdateChunk()

    : m_bitmapSharedMemory(0)

{

}

UpdateChunk::UpdateChunk(const IntRect& rect)

    : m_rect(rect)

{

    // Create our shared memory mapping.

    unsigned memorySize = rect.height() * rect.width() * 4;

    m_bitmapSharedMemory = ::CreateFileMapping(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, 0, memorySize, 0);

}

UpdateChunk::UpdateChunk(const IntRect& rect, HANDLE bitmapSharedMemory)

    : m_rect(rect)

    , m_bitmapSharedMemory(bitmapSharedMemory)

{

}

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

{

    encoder.encode(m_rect);

    encoder.encode(reinterpret_cast<uintptr_t>(m_bitmapSharedMemory));

}

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

{

    IntRect rect;

    if (!decoder.decode(rect))

        return false;

    updateChunk.m_rect = rect;

    uintptr_t bitmapSharedMmemory;

    if (!decoder.decode(bitmapSharedMmemory))

        return false;

    updateChunk.m_bitmapSharedMemory = reinterpret_cast<HANDLE>(bitmapSharedMmemory);

    return true;

}

} // namespace WebKit