| /* |
| * Copyright (C) 2011 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef FilterEffectRenderer_h |
| #define FilterEffectRenderer_h |
| |
| #include "core/svg/graphics/filters/SVGFilterBuilder.h" |
| #include "platform/geometry/FloatRect.h" |
| #include "platform/geometry/IntRectExtent.h" |
| #include "platform/geometry/LayoutRect.h" |
| #include "platform/graphics/ImageBuffer.h" |
| #include "platform/graphics/filters/Filter.h" |
| #include "platform/graphics/filters/FilterEffect.h" |
| #include "platform/graphics/filters/FilterOperations.h" |
| #include "platform/graphics/filters/SourceGraphic.h" |
| #include "wtf/PassRefPtr.h" |
| #include "wtf/RefCounted.h" |
| #include "wtf/RefPtr.h" |
| |
| namespace blink { |
| |
| class GraphicsContext; |
| class RenderLayer; |
| class RenderObject; |
| |
| class FilterEffectRendererHelper { |
| public: |
| FilterEffectRendererHelper(bool haveFilterEffect) |
| : m_savedGraphicsContext(0) |
| , m_renderLayer(0) |
| , m_haveFilterEffect(haveFilterEffect) |
| { |
| } |
| |
| bool haveFilterEffect() const { return m_haveFilterEffect; } |
| bool hasStartedFilterEffect() const { return m_savedGraphicsContext; } |
| |
| bool prepareFilterEffect(RenderLayer*, const LayoutRect& filterBoxRect, const LayoutRect& dirtyRect); |
| GraphicsContext* beginFilterEffect(GraphicsContext* oldContext); |
| GraphicsContext* applyFilterEffect(); |
| |
| const LayoutRect& repaintRect() const { return m_repaintRect; } |
| private: |
| GraphicsContext* m_savedGraphicsContext; |
| RenderLayer* m_renderLayer; |
| |
| LayoutRect m_repaintRect; |
| bool m_haveFilterEffect; |
| }; |
| |
| class FilterEffectRenderer FINAL : public Filter |
| { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| static PassRefPtr<FilterEffectRenderer> create() |
| { |
| return adoptRef(new FilterEffectRenderer()); |
| } |
| |
| void setSourceImageRect(const IntRect& sourceImageRect) |
| { |
| m_sourceDrawingRegion = sourceImageRect; |
| m_graphicsBufferAttached = false; |
| } |
| virtual IntRect sourceImageRect() const OVERRIDE { return m_sourceDrawingRegion; } |
| |
| GraphicsContext* inputContext(); |
| ImageBuffer* output() const { return lastEffect()->asImageBuffer(); } |
| |
| bool build(RenderObject* renderer, const FilterOperations&); |
| bool updateBackingStoreRect(const FloatRect& filterRect); |
| void allocateBackingStoreIfNeeded(); |
| void clearIntermediateResults(); |
| void apply(); |
| |
| IntRect outputRect() const { return lastEffect()->hasResult() ? lastEffect()->absolutePaintRect() : IntRect(); } |
| |
| bool hasFilterThatMovesPixels() const { return m_hasFilterThatMovesPixels; } |
| LayoutRect computeSourceImageRectForDirtyRect(const LayoutRect& filterBoxRect, const LayoutRect& dirtyRect); |
| |
| PassRefPtr<FilterEffect> lastEffect() const |
| { |
| return m_lastEffect; |
| } |
| private: |
| |
| FilterEffectRenderer(); |
| virtual ~FilterEffectRenderer(); |
| |
| IntRect m_sourceDrawingRegion; |
| |
| RefPtr<SourceGraphic> m_sourceGraphic; |
| RefPtr<FilterEffect> m_lastEffect; |
| |
| bool m_graphicsBufferAttached; |
| bool m_hasFilterThatMovesPixels; |
| }; |
| |
| } // namespace blink |
| |
| |
| #endif // FilterEffectRenderer_h |