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Viewing changes to Source/WebCore/platform/graphics/filters/skia/FEGaussianBlurSkia.cpp

  • Committer: Package Import Robot
  • Author(s): Jonathan Riddell
  • Date: 2013-02-18 14:24:18 UTC
  • Revision ID: package-import@ubuntu.com-20130218142418-eon0jmjg3nj438uy
Tags: upstream-2.3
Import upstream version 2.3

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Source/WebCore/platform/graphics/filters/skia/FEGaussianBlurSkia.cpp
 
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/*
 
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 * Copyright (C) 2011 Google Inc. All rights reserved.
 
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 *
 
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 * Redistribution and use in source and binary forms, with or without
 
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 * modification, are permitted provided that the following conditions
 
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 * are met:
 
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 *
 
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 * 1.  Redistributions of source code must retain the above copyright
 
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 *     notice, this list of conditions and the following disclaimer.
 
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 * 2.  Redistributions in binary form must reproduce the above copyright
 
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 *     notice, this list of conditions and the following disclaimer in the
 
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 *     documentation and/or other materials provided with the distribution.
 
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 *
 
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 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 
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 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 
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 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 
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 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
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 */
 
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#include "config.h"
 
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#if USE(SKIA)
 
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#include "FEGaussianBlur.h"
 
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#include "BitmapImageSingleFrameSkia.h"
 
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#include "SkBlurImageFilter.h"
 
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#include "SkiaImageFilterBuilder.h"
 
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namespace WebCore {
 
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bool FEGaussianBlur::platformApplySkia()
 
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{
 
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    ImageBuffer* resultImage = createImageBufferResult();
 
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    if (!resultImage)
 
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        return false;
 
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    FilterEffect* in = inputEffect(0);
 
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    IntRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect());
 
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    setIsAlphaImage(in->isAlphaImage());
 
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    float stdX = filter()->applyHorizontalScale(m_stdX);
 
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    float stdY = filter()->applyVerticalScale(m_stdY);
 
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    RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore);
 
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    SkPaint paint;
 
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    GraphicsContext* dstContext = resultImage->context();
 
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    PlatformContextSkia* platformContext = dstContext->platformContext();
 
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    paint.setImageFilter(new SkBlurImageFilter(stdX, stdY))->unref();
 
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    platformContext->saveLayer(0, &paint);
 
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    paint.setColor(0xFFFFFFFF);
 
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    dstContext->drawImage(image.get(), ColorSpaceDeviceRGB, drawingRegion.location(), CompositeCopy);
 
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    platformContext->restoreLayer();
 
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    return true;
 
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}
 
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SkImageFilter* FEGaussianBlur::createImageFilter(SkiaImageFilterBuilder* builder)
 
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{
 
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    SkAutoTUnref<SkImageFilter> input(builder->build(inputEffect(0)));
 
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    return new SkBlurImageFilter(SkFloatToScalar(m_stdX), SkFloatToScalar(m_stdY), input);
 
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}
 
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};
 
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#endif