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123 lines
4.6 KiB
C++
123 lines
4.6 KiB
C++
/*
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* Copyright (C) 2012 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_CORE_RENDERING_RENDERGEOMETRYMAP_H_
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#define SKY_ENGINE_CORE_RENDERING_RENDERGEOMETRYMAP_H_
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#include "flutter/sky/engine/core/rendering/RenderGeometryMapStep.h"
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#include "flutter/sky/engine/core/rendering/RenderObject.h"
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#include "flutter/sky/engine/platform/geometry/FloatPoint.h"
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#include "flutter/sky/engine/platform/geometry/FloatQuad.h"
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#include "flutter/sky/engine/platform/geometry/IntSize.h"
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#include "flutter/sky/engine/platform/geometry/LayoutSize.h"
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#include "flutter/sky/engine/wtf/OwnPtr.h"
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namespace blink {
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class RenderLayer;
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class RenderBox;
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class TransformationMatrix;
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class TransformState;
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// Can be used while walking the Renderer tree to cache data about offsets and
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// transforms.
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class RenderGeometryMap {
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WTF_MAKE_NONCOPYABLE(RenderGeometryMap);
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public:
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RenderGeometryMap(MapCoordinatesFlags = UseTransforms);
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~RenderGeometryMap();
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MapCoordinatesFlags mapCoordinatesFlags() const {
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return m_mapCoordinatesFlags;
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}
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FloatRect absoluteRect(const FloatRect& rect) const {
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return mapToContainer(rect, 0).boundingBox();
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}
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// Map to a container. Will assert that the container has been pushed onto
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// this map. A null container maps through the RenderView (including its scale
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// transform, if any). If the container is the RenderView, the scroll offset
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// is applied, but not the scale.
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FloatPoint mapToContainer(const FloatPoint&, const RenderBox*) const;
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FloatQuad mapToContainer(const FloatRect&, const RenderBox*) const;
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// Called by code walking the renderer or layer trees.
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void pushMappingsToAncestor(const RenderLayer*,
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const RenderLayer* ancestorLayer);
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void popMappingsToAncestor(const RenderLayer*);
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void pushMappingsToAncestor(const RenderObject*,
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const RenderBox* ancestorRenderer);
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void popMappingsToAncestor(const RenderBox*);
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// The following methods should only be called by renderers inside a call to
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// pushMappingsToAncestor().
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// Push geometry info between this renderer and some ancestor. The ancestor
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// must be its container() or some stacking context between the renderer and
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// its container.
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void push(const RenderObject*,
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const LayoutSize&,
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bool accumulatingTransform = false,
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bool isNonUniform = false,
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bool hasTransform = false);
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void push(const RenderObject*,
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const TransformationMatrix&,
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bool accumulatingTransform = false,
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bool isNonUniform = false,
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bool hasTransform = false);
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private:
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void mapToContainer(TransformState&, const RenderBox* container = 0) const;
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void stepInserted(const RenderGeometryMapStep&);
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void stepRemoved(const RenderGeometryMapStep&);
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bool hasNonUniformStep() const { return m_nonUniformStepsCount; }
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bool hasTransformStep() const { return m_transformedStepsCount; }
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#ifndef NDEBUG
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void dumpSteps() const;
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#endif
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#if ENABLE(ASSERT)
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bool isTopmostRenderView(const RenderObject* renderer) const;
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#endif
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typedef Vector<RenderGeometryMapStep, 32> RenderGeometryMapSteps;
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size_t m_insertionPosition;
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int m_nonUniformStepsCount;
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int m_transformedStepsCount;
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RenderGeometryMapSteps m_mapping;
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LayoutSize m_accumulatedOffset;
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MapCoordinatesFlags m_mapCoordinatesFlags;
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_RENDERING_RENDERGEOMETRYMAP_H_
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