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 COMPUTER, 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 COMPUTER, 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 "platform/geometry/IntSize.h" 30 #include "platform/graphics/GeneratedImage.h" 31 #include "platform/graphics/Image.h" 32 #include "platform/graphics/ImageObserver.h" 33 #include "wtf/RefPtr.h" 34 35 namespace WebCore { 36 37 class CSSCrossfadeValue; 38 39 class PLATFORM_EXPORT CrossfadeGeneratedImage : public GeneratedImage { 40 public: create(Image * fromImage,Image * toImage,float percentage,IntSize crossfadeSize,const IntSize & size)41 static PassRefPtr<CrossfadeGeneratedImage> create(Image* fromImage, Image* toImage, float percentage, IntSize crossfadeSize, const IntSize& size) 42 { 43 return adoptRef(new CrossfadeGeneratedImage(fromImage, toImage, percentage, crossfadeSize, size)); 44 } 45 setContainerSize(const IntSize &)46 virtual void setContainerSize(const IntSize&) OVERRIDE { } usesContainerSize()47 virtual bool usesContainerSize() const OVERRIDE { return false; } hasRelativeWidth()48 virtual bool hasRelativeWidth() const OVERRIDE { return false; } hasRelativeHeight()49 virtual bool hasRelativeHeight() const OVERRIDE { return false; } 50 size()51 virtual IntSize size() const OVERRIDE { return m_crossfadeSize; } 52 53 protected: 54 virtual void draw(GraphicsContext*, const FloatRect&, const FloatRect&, 55 CompositeOperator, blink::WebBlendMode) OVERRIDE; 56 virtual void drawPattern(GraphicsContext*, const FloatRect&, 57 const FloatSize&, const FloatPoint&, CompositeOperator, 58 const FloatRect&, blink::WebBlendMode, const IntSize& repeatSpacing) OVERRIDE; 59 60 CrossfadeGeneratedImage(Image* fromImage, Image* toImage, float percentage, IntSize crossfadeSize, const IntSize&); 61 62 private: 63 void drawCrossfade(GraphicsContext*); 64 65 Image* m_fromImage; 66 Image* m_toImage; 67 68 float m_percentage; 69 IntSize m_crossfadeSize; 70 }; 71 72 } 73 74 #endif 75