| /* |
| * Copyright (C) 2011-2017 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 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. |
| */ |
| |
| #pragma once |
| |
| #include "Filter.h" |
| #include "IntRectExtent.h" |
| #include "LayoutRect.h" |
| |
| namespace WebCore { |
| |
| class Document; |
| class FilterEffect; |
| class FilterOperations; |
| class GraphicsContext; |
| class ReferenceFilterOperation; |
| class RenderElement; |
| class RenderLayer; |
| class SourceGraphic; |
| |
| enum FilterConsumer { FilterProperty, FilterFunction }; |
| |
| class FilterEffectRendererHelper { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| FilterEffectRendererHelper(bool haveFilterEffect, GraphicsContext& targetContext); |
| |
| bool haveFilterEffect() const { return m_haveFilterEffect; } |
| bool hasStartedFilterEffect() const { return m_startedFilterEffect; } |
| |
| bool prepareFilterEffect(RenderLayer&, const LayoutRect& filterBoxRect, const LayoutRect& dirtyRect, const LayoutRect& layerRepaintRect); |
| bool beginFilterEffect(); |
| void applyFilterEffect(GraphicsContext& destinationContext); |
| |
| GraphicsContext* filterContext() const; |
| |
| const LayoutRect& repaintRect() const { return m_repaintRect; } |
| |
| private: |
| RenderLayer* m_renderLayer { nullptr }; // FIXME: this is mainly used to get the FilterEffectRenderer. FilterEffectRendererHelper should be weaned off it. |
| LayoutPoint m_paintOffset; |
| LayoutRect m_repaintRect; |
| const GraphicsContext& m_targetContext; |
| bool m_haveFilterEffect { false }; |
| bool m_startedFilterEffect { false }; |
| }; |
| |
| // This is used to render filters for the CSS filter: property, and the filter() image function. |
| class FilterEffectRenderer final : public Filter { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| friend class FilterEffectRendererHelper; |
| |
| static Ref<FilterEffectRenderer> create(); |
| |
| void setSourceImageRect(const FloatRect&); |
| void setFilterRegion(const FloatRect& filterRegion) { m_filterRegion = filterRegion; } |
| |
| ImageBuffer* output() const; |
| |
| bool build(RenderElement&, const FilterOperations&, FilterConsumer); |
| void clearIntermediateResults(); |
| void apply(); |
| |
| bool hasFilterThatMovesPixels() const { return m_hasFilterThatMovesPixels; } |
| bool hasFilterThatShouldBeRestrictedBySecurityOrigin() const { return m_hasFilterThatShouldBeRestrictedBySecurityOrigin; } |
| |
| private: |
| FilterEffectRenderer(); |
| virtual ~FilterEffectRenderer(); |
| |
| FloatRect sourceImageRect() const final { return m_sourceDrawingRegion; } |
| FloatRect filterRegion() const final { return m_filterRegion; } |
| |
| RefPtr<FilterEffect> buildReferenceFilter(RenderElement&, FilterEffect& previousEffect, ReferenceFilterOperation&); |
| |
| void setMaxEffectRects(const FloatRect&); |
| |
| GraphicsContext* inputContext(); |
| |
| bool updateBackingStoreRect(const FloatRect& filterRect); |
| void allocateBackingStoreIfNeeded(const GraphicsContext&); |
| |
| IntRect outputRect() const; |
| |
| LayoutRect computeSourceImageRectForDirtyRect(const LayoutRect& filterBoxRect, const LayoutRect& dirtyRect); |
| |
| FloatRect m_sourceDrawingRegion; |
| FloatRect m_filterRegion; |
| |
| Vector<Ref<FilterEffect>> m_effects; |
| Ref<SourceGraphic> m_sourceGraphic; |
| |
| IntRectExtent m_outsets; |
| |
| bool m_graphicsBufferAttached { false }; |
| bool m_hasFilterThatMovesPixels { false }; |
| bool m_hasFilterThatShouldBeRestrictedBySecurityOrigin { false }; |
| }; |
| |
| inline FilterEffectRendererHelper::FilterEffectRendererHelper(bool haveFilterEffect, GraphicsContext& targetContext) |
| : m_targetContext(targetContext) |
| , m_haveFilterEffect(haveFilterEffect) |
| { |
| } |
| |
| inline void FilterEffectRenderer::setSourceImageRect(const FloatRect& sourceImageRect) |
| { |
| m_sourceDrawingRegion = sourceImageRect; |
| setMaxEffectRects(sourceImageRect); |
| setFilterRegion(sourceImageRect); |
| m_graphicsBufferAttached = false; |
| } |
| |
| } // namespace WebCore |