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