/*

 * Copyright (C) 2010 Apple Inc. All rights reserved.

 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)

 *

 * 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 "ChunkedUpdateDrawingAreaProxy.h"

#include "DrawingAreaMessageKinds.h"

#include "DrawingAreaProxyMessageKinds.h"

#include "UpdateChunk.h"

#include "WKAPICast.h"

#include "WebPageProxy.h"

#include "qgraphicswkview.h"

#include <QPainter>

using namespace WebCore;

namespace WebKit {

WebPageProxy* ChunkedUpdateDrawingAreaProxy::page()

{

    return toWK(m_webView->page()->pageRef());

}

void ChunkedUpdateDrawingAreaProxy::ensureBackingStore()

{

    if (!m_backingStoreImage.isNull())

        return;

    m_backingStoreImage = QImage(m_viewSize.width(), m_viewSize.height(), QImage::Format_RGB32);

}

void ChunkedUpdateDrawingAreaProxy::invalidateBackingStore()

{

    m_backingStoreImage = QImage();

}

void ChunkedUpdateDrawingAreaProxy::platformPaint(const IntRect& rect, QPainter* painter)

{

    if (m_backingStoreImage.isNull())

        return;

    painter->drawImage(QPoint(0, 0), m_backingStoreImage);

}

void ChunkedUpdateDrawingAreaProxy::drawUpdateChunkIntoBackingStore(UpdateChunk* updateChunk)

{

    ensureBackingStore();

    QImage image(updateChunk->createImage());

    const IntRect& updateChunkRect = updateChunk->rect();

    QPainter painter(&m_backingStoreImage);

    painter.drawImage(updateChunkRect.topLeft(), image);

    m_webView->update(QRect(updateChunkRect));

}

} // namespace WebKit