1/* 2 * Copyright (C) 2011 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. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef CrossfadeGeneratedImage_h 27#define CrossfadeGeneratedImage_h 28 29#include "FloatSize.h" 30#include "GeneratedImage.h" 31#include "Image.h" 32#include "ImageObserver.h" 33#include <wtf/RefPtr.h> 34 35namespace WebCore { 36 37class CSSCrossfadeValue; 38 39class CrossfadeGeneratedImage final : public GeneratedImage { 40public: 41 static PassRefPtr<CrossfadeGeneratedImage> create(Image* fromImage, Image* toImage, float percentage, const FloatSize& crossfadeSize, const FloatSize& size) 42 { 43 return adoptRef(new CrossfadeGeneratedImage(fromImage, toImage, percentage, crossfadeSize, size)); 44 } 45 46 virtual void setContainerSize(const FloatSize&) override { } 47 virtual bool usesContainerSize() const override { return false; } 48 virtual bool hasRelativeWidth() const override { return false; } 49 virtual bool hasRelativeHeight() const override { return false; } 50 51 virtual FloatSize size() const override { return m_crossfadeSize; } 52 53protected: 54 virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace styleColorSpace, CompositeOperator, BlendMode, ImageOrientationDescription) override; 55 virtual void drawPattern(GraphicsContext*, const FloatRect& srcRect, const AffineTransform& patternTransform, const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator, const FloatRect& dstRect, BlendMode) override; 56 57 CrossfadeGeneratedImage(Image* fromImage, Image* toImage, float percentage, const FloatSize& crossfadeSize, const FloatSize&); 58 59private: 60 void drawCrossfade(GraphicsContext*); 61 62 Image* m_fromImage; 63 Image* m_toImage; 64 65 float m_percentage; 66 FloatSize m_crossfadeSize; 67}; 68 69} 70 71#endif 72