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70 lines
2.9 KiB
C++
70 lines
2.9 KiB
C++
/*
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* Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
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* Copyright (C) 2014 Google 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 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 CompositingRequirementsUpdater_h
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#define CompositingRequirementsUpdater_h
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#include "platform/geometry/IntRect.h"
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#include "platform/graphics/CompositingReasons.h"
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#include "wtf/Vector.h"
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namespace blink {
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class CompositingReasonFinder;
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class RenderLayer;
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class RenderObject;
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class RenderView;
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class CompositingRequirementsUpdater {
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public:
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CompositingRequirementsUpdater(RenderView&, CompositingReasonFinder&);
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~CompositingRequirementsUpdater();
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// Recurse through the layers in z-index and overflow order (which is equivalent to painting order)
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// For the z-order children of a compositing layer:
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// If a child layers has a compositing layer, then all subsequent layers must
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// be compositing in order to render above that layer.
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//
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// If a child in the negative z-order list is compositing, then the layer itself
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// must be compositing so that its contents render over that child.
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// This implies that its positive z-index children must also be compositing.
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//
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void update(RenderLayer* root);
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private:
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class OverlapMap;
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class RecursionData;
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void updateRecursive(RenderLayer* ancestorLayer, RenderLayer* currentLayer, OverlapMap&, RecursionData&, bool& descendantHas3DTransform, Vector<RenderLayer*>& unclippedDescendants, IntRect& absoluteDecendantBoundingBox);
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RenderView& m_renderView;
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CompositingReasonFinder& m_compositingReasonFinder;
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};
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} // namespace blink
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#endif // CompositingRequirementsUpdater_h
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