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 "ChunkedUpdateDrawingAreaProxy.h"

    27 

    28 #include "DrawingAreaMessageKinds.h"

    29 #include "DrawingAreaProxyMessageKinds.h"

    30 #include "UpdateChunk.h"

    31 #include "WKAPICast.h"

    32 #include "WKView.h"

    33 #include "WebPageProxy.h"

    34 

    35 using namespace WebCore;

    36 

    37 namespace WebKit {

    38 

    39 WebPageProxy* ChunkedUpdateDrawingAreaProxy::page()

    40 {

    41     return toWK([m_webView pageRef]);

    42 }

    43 

    44 void ChunkedUpdateDrawingAreaProxy::ensureBackingStore()

    45 {

    46     if (m_bitmapContext)

    47         return;

    48 

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

    50     m_bitmapContext.adoptCF(CGBitmapContextCreate(0, m_viewSize.width(), m_viewSize.height(), 8, m_viewSize.width() * 4, colorSpace.get(), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host));

    51     

    52     // Flip the bitmap context coordinate system.

    53     CGContextTranslateCTM(m_bitmapContext.get(), 0, m_viewSize.height());

    54     CGContextScaleCTM(m_bitmapContext.get(), 1, -1);

    55 }

    56 

    57 void ChunkedUpdateDrawingAreaProxy::invalidateBackingStore()

    58 {

    59     m_bitmapContext = 0;

    60 }

    61 

    62 void ChunkedUpdateDrawingAreaProxy::platformPaint(const IntRect& rect, CGContextRef context)

    63 {

    64     if (!m_bitmapContext)

    65         return;

    66 

    67     RetainPtr<CGImageRef> image(AdoptCF, CGBitmapContextCreateImage(m_bitmapContext.get()));

    68     CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image.get()), CGImageGetHeight(image.get())), image.get());

    69 }

    70 

    71 void ChunkedUpdateDrawingAreaProxy::drawUpdateChunkIntoBackingStore(UpdateChunk* updateChunk)

    72 {

    73     ensureBackingStore();

    74 

    75     RetainPtr<CGImageRef> image(updateChunk->createImage());

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

    77 

    78     CGContextDrawImage(m_bitmapContext.get(), CGRectMake(updateChunkRect.x(), m_viewSize.height() - updateChunkRect.bottom(), 

    79                                                          updateChunkRect.width(), updateChunkRect.height()), image.get());

    80     [m_webView setNeedsDisplayInRect:NSRectFromCGRect(updateChunkRect)];

    81 }

    82 

    83 } // namespace WebKit