1 /*

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

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

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions

     7  * are met:

     8  * 1. Redistributions of source code must retain the above copyright

     9  *    notice, this list of conditions and the following disclaimer.

    10  * 2. Redistributions in binary form must reproduce the above copyright

    11  *    notice, this list of conditions and the following disclaimer in the

    12  *    documentation and/or other materials provided with the distribution.

    13  *

    14  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

    15  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

    16  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    17  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

    18  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    19  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    20  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    21  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    22  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    23  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

    24  * THE POSSIBILITY OF SUCH DAMAGE.

    25  */

    26 

    27 #include "ChunkedUpdateDrawingAreaProxy.h"

    28 

    29 #include "DrawingAreaMessageKinds.h"

    30 #include "DrawingAreaProxyMessageKinds.h"

    31 #include "UpdateChunk.h"

    32 #include "WKAPICast.h"

    33 #include "WebPageProxy.h"

    34 #include "qgraphicswkview.h"

    35 #include <QPainter>

    36 

    37 using namespace WebCore;

    38 

    39 namespace WebKit {

    40 

    41 WebPageProxy* ChunkedUpdateDrawingAreaProxy::page()

    42 {

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

    44 }

    45 

    46 void ChunkedUpdateDrawingAreaProxy::ensureBackingStore()

    47 {

    48     if (!m_backingStoreImage.isNull())

    49         return;

    50 

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

    52 }

    53 

    54 void ChunkedUpdateDrawingAreaProxy::invalidateBackingStore()

    55 {

    56     m_backingStoreImage = QImage();

    57 }

    58 

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

    60 {

    61     if (m_backingStoreImage.isNull())

    62         return;

    63 

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

    65 }

    66 

    67 void ChunkedUpdateDrawingAreaProxy::drawUpdateChunkIntoBackingStore(UpdateChunk* updateChunk)

    68 {

    69     ensureBackingStore();

    70 

    71     QImage image(updateChunk->createImage());

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

    73 

    74     QPainter painter(&m_backingStoreImage);

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

    76 

    77     m_webView->update(QRect(updateChunkRect));

    78 }

    79 

    80 } // namespace WebKit