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