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 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 FilterEffectRenderer_h 27 #define FilterEffectRenderer_h 28 29 #include "core/svg/graphics/filters/SVGFilterBuilder.h" 30 #include "platform/geometry/FloatRect.h" 31 #include "platform/geometry/IntRectExtent.h" 32 #include "platform/geometry/LayoutRect.h" 33 #include "platform/graphics/GraphicsContext.h" 34 #include "platform/graphics/ImageBuffer.h" 35 #include "platform/graphics/filters/Filter.h" 36 #include "platform/graphics/filters/FilterEffect.h" 37 #include "platform/graphics/filters/FilterOperations.h" 38 #include "platform/graphics/filters/SourceGraphic.h" 39 #include "wtf/PassRefPtr.h" 40 #include "wtf/RefCounted.h" 41 #include "wtf/RefPtr.h" 42 43 namespace WebCore { 44 45 class ShaderResource; 46 class CustomFilterProgram; 47 class Document; 48 class GraphicsContext; 49 class RenderLayer; 50 class RenderObject; 51 52 class FilterEffectRendererHelper { 53 public: FilterEffectRendererHelper(bool haveFilterEffect)54 FilterEffectRendererHelper(bool haveFilterEffect) 55 : m_savedGraphicsContext(0) 56 , m_renderLayer(0) 57 , m_haveFilterEffect(haveFilterEffect) 58 { 59 } 60 haveFilterEffect()61 bool haveFilterEffect() const { return m_haveFilterEffect; } hasStartedFilterEffect()62 bool hasStartedFilterEffect() const { return m_savedGraphicsContext; } 63 64 bool prepareFilterEffect(RenderLayer*, const LayoutRect& filterBoxRect, const LayoutRect& dirtyRect, const LayoutRect& layerRepaintRect); 65 GraphicsContext* beginFilterEffect(GraphicsContext* oldContext); 66 GraphicsContext* applyFilterEffect(); 67 repaintRect()68 const LayoutRect& repaintRect() const { return m_repaintRect; } 69 private: 70 GraphicsContext* m_savedGraphicsContext; 71 RenderLayer* m_renderLayer; 72 73 LayoutRect m_repaintRect; 74 bool m_haveFilterEffect; 75 }; 76 77 class FilterEffectRenderer : public Filter 78 { 79 WTF_MAKE_FAST_ALLOCATED; 80 public: create()81 static PassRefPtr<FilterEffectRenderer> create() 82 { 83 return adoptRef(new FilterEffectRenderer()); 84 } 85 setSourceImageRect(const FloatRect & sourceImageRect)86 void setSourceImageRect(const FloatRect& sourceImageRect) 87 { 88 m_sourceDrawingRegion = sourceImageRect; 89 m_graphicsBufferAttached = false; 90 } sourceImageRect()91 virtual FloatRect sourceImageRect() const { return m_sourceDrawingRegion; } 92 93 GraphicsContext* inputContext(); output()94 ImageBuffer* output() const { return lastEffect()->asImageBuffer(); } 95 96 bool build(RenderObject* renderer, const FilterOperations&); 97 bool updateBackingStoreRect(const FloatRect& filterRect); 98 void allocateBackingStoreIfNeeded(); 99 void clearIntermediateResults(); 100 void apply(); 101 outputRect()102 IntRect outputRect() const { return lastEffect()->hasResult() ? lastEffect()->absolutePaintRect() : IntRect(); } 103 hasFilterThatMovesPixels()104 bool hasFilterThatMovesPixels() const { return m_hasFilterThatMovesPixels; } 105 LayoutRect computeSourceImageRectForDirtyRect(const LayoutRect& filterBoxRect, const LayoutRect& dirtyRect); 106 hasCustomShaderFilter()107 bool hasCustomShaderFilter() const { return m_hasCustomShaderFilter; } lastEffect()108 PassRefPtr<FilterEffect> lastEffect() const 109 { 110 return m_lastEffect; 111 } 112 private: 113 114 FilterEffectRenderer(); 115 virtual ~FilterEffectRenderer(); 116 117 FloatRect m_sourceDrawingRegion; 118 119 RefPtr<SourceGraphic> m_sourceGraphic; 120 RefPtr<FilterEffect> m_lastEffect; 121 122 IntRectExtent m_outsets; 123 124 bool m_graphicsBufferAttached; 125 bool m_hasFilterThatMovesPixels; 126 bool m_hasCustomShaderFilter; 127 }; 128 129 } // namespace WebCore 130 131 132 #endif // FilterEffectRenderer_h 133