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 "ChunkedUpdateDrawingArea.h"

    27 

    28 #include "UpdateChunk.h"

    29 #include "WebPage.h"

    30 #include <WebCore/GraphicsContext.h>

    31 #include <wtf/RetainPtr.h>

    32 

    33 using namespace WebCore;

    34 

    35 namespace WebKit {

    36 

    37 void ChunkedUpdateDrawingArea::paintIntoUpdateChunk(UpdateChunk* updateChunk)

    38 {

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

    40     RetainPtr<CGContextRef> bitmapContext(AdoptCF, CGBitmapContextCreate(updateChunk->data(), updateChunk->rect().width(), updateChunk->rect().height(), 8, updateChunk->rect().width() * 4, colorSpace.get(), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host));

    41 

    42     // WebCore expects a flipped coordinate system.

    43     CGContextTranslateCTM(bitmapContext.get(), 0.0, updateChunk->rect().height());

    44     CGContextScaleCTM(bitmapContext.get(), 1.0, -1.0);

    45 

    46     // Now paint into the backing store.

    47     GraphicsContext graphicsContext(bitmapContext.get());

    48     graphicsContext.translate(-updateChunk->rect().x(), -updateChunk->rect().y());

    49     

    50     m_webPage->drawRect(graphicsContext, updateChunk->rect());

    51 }

    52 

    53 } // namespace WebKit