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ce43f3d0c1
This is all wasted effort in sky since we invalidate the whole viewport on every frame. We'll probably eventually add back in some invalidation, but it likely won't be rect-based. R=esprehn@chromium.org Review URL: https://codereview.chromium.org/840403003
86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved.
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* Copyright (C) 2010, 2012 Google Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef SKY_ENGINE_CORE_RENDERING_RENDERLAYERMODELOBJECT_H_
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#define SKY_ENGINE_CORE_RENDERING_RENDERLAYERMODELOBJECT_H_
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#include "sky/engine/core/rendering/RenderObject.h"
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namespace blink {
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class RenderLayer;
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class ScrollableArea;
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enum LayerType {
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NoLayer,
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NormalLayer,
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// A forced or overflow clip layer is required for bookkeeping purposes,
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// but does not force a layer to be self painting.
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OverflowClipLayer,
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ForcedLayer
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};
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class RenderLayerModelObject : public RenderObject {
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public:
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explicit RenderLayerModelObject(ContainerNode*);
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virtual ~RenderLayerModelObject();
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// This is the only way layers should ever be destroyed.
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void destroyLayer();
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bool hasSelfPaintingLayer() const;
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RenderLayer* layer() const { return m_layer.get(); }
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ScrollableArea* scrollableArea() const;
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virtual void styleWillChange(StyleDifference, const RenderStyle& newStyle) override;
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virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
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virtual void updateFromStyle() { }
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virtual LayerType layerTypeRequired() const = 0;
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// Returns true if the background is painted opaque in the given rect.
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// The query rect is given in local coordinate system.
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virtual bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const { return false; }
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// This is null for anonymous renderers.
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ContainerNode* node() const { return toContainerNode(RenderObject::node()); }
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virtual void invalidateTreeIfNeeded(const PaintInvalidationState&) override;
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protected:
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void createLayer(LayerType);
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virtual void willBeDestroyed() override;
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private:
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virtual bool isLayerModelObject() const override final { return true; }
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OwnPtr<RenderLayer> m_layer;
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// Used to store state between styleWillChange and styleDidChange
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static bool s_wasFloating;
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};
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DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderLayerModelObject, isLayerModelObject());
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} // namespace blink
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#endif // SKY_ENGINE_CORE_RENDERING_RENDERLAYERMODELOBJECT_H_
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