| // 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 WebCore { |
| |
| class RenderLayer; |
| class RenderObject; |
| class RenderView; |
| |
| class CompositingReasonFinder { |
| WTF_MAKE_NONCOPYABLE(CompositingReasonFinder); |
| public: |
| explicit CompositingReasonFinder(RenderView&); |
| |
| CompositingReasons styleDeterminedReasons(RenderObject*) const; |
| CompositingReasons directReasons(const RenderLayer*, bool* needToRecomputeCompositingRequirements) const; |
| |
| CompositingReasons suppressWillChangeAndAnimationForGpuRasterization(const RenderLayer*, CompositingReasons styleReasons) const; |
| |
| void updateTriggers(); |
| |
| bool hasOverflowScrollTrigger() const; |
| bool hasLegacyOverflowScrollTrigger() const; |
| |
| bool requiresCompositingForScrollableFrame() const; |
| bool requiresCompositingForPosition(RenderObject*, const RenderLayer*, RenderLayer::ViewportConstrainedNotCompositedReason*, bool* needToRecomputeCompositingRequirements) const; |
| |
| static bool isViewportConstrainedFixedOrStickyLayer(const RenderLayer*); |
| |
| private: |
| bool isMainFrame() const; |
| |
| CompositingReasons nonStyleDeterminedDirectReasons(const RenderLayer*, bool* needToRecomputeCompositingRequirements) const; |
| |
| bool requiresCompositingForAnimation(RenderObject*) const; |
| bool requiresCompositingForTransform(RenderObject*) const; |
| bool requiresCompositingForBackfaceVisibilityHidden(RenderObject*) const; |
| bool requiresCompositingForFilters(RenderObject*) const; |
| bool requiresCompositingForOverflowScrollingParent(const RenderLayer*) const; |
| bool requiresCompositingForOutOfFlowClipping(const RenderLayer*) const; |
| bool requiresCompositingForOverflowScrolling(const RenderLayer*) const; |
| bool requiresCompositingForPositionSticky(RenderObject*, const RenderLayer*) const; |
| bool requiresCompositingForPositionFixed(RenderObject*, const RenderLayer*, RenderLayer::ViewportConstrainedNotCompositedReason*, bool* needToRecomputeCompositingRequirements) const; |
| bool requiresCompositingForWillChangeCompositingHint(const RenderObject*) const; |
| bool requiresCompositingForWillChangeGpuRasterizationHint(const RenderObject*) const; |
| |
| RenderView& m_renderView; |
| CompositingTriggerFlags m_compositingTriggers; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // CompositingReasonFinder_h |