| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CompositingReasonFinder_h |
| #define CompositingReasonFinder_h |
| |
| #include "core/rendering/RenderLayer.h" |
| #include "core/rendering/compositing/CompositingTriggers.h" |
| #include "platform/graphics/CompositingReasons.h" |
| |
| namespace blink { |
| |
| class RenderObject; |
| class RenderView; |
| |
| class CompositingReasonFinder { |
| WTF_MAKE_NONCOPYABLE(CompositingReasonFinder); |
| public: |
| explicit CompositingReasonFinder(RenderView&); |
| |
| CompositingReasons potentialCompositingReasonsFromStyle(RenderObject*) const; |
| CompositingReasons directReasons(const RenderLayer*) const; |
| |
| void updateTriggers(); |
| |
| bool hasOverflowScrollTrigger() const; |
| bool requiresCompositingForScrollableFrame() const; |
| |
| private: |
| bool isMainFrame() const; |
| |
| CompositingReasons nonStyleDeterminedDirectReasons(const RenderLayer*) const; |
| |
| bool requiresCompositingForTransform(RenderObject*) const; |
| bool requiresCompositingForAnimation(RenderStyle*) const; |
| bool requiresCompositingForPositionFixed(const RenderLayer*) const; |
| |
| RenderView& m_renderView; |
| CompositingTriggerFlags m_compositingTriggers; |
| }; |
| |
| } // namespace blink |
| |
| #endif // CompositingReasonFinder_h |