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Issue 14863002: Only update composited-scrolling state once after layout. (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: . Created 7 years, 7 months ago
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1 /* 1 /*
2 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved. 2 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
3 * 3 *
4 * Portions are Copyright (C) 1998 Netscape Communications Corporation. 4 * Portions are Copyright (C) 1998 Netscape Communications Corporation.
5 * 5 *
6 * Other contributors: 6 * Other contributors:
7 * Robert O'Callahan <roc+@cs.cmu.edu> 7 * Robert O'Callahan <roc+@cs.cmu.edu>
8 * David Baron <dbaron@fas.harvard.edu> 8 * David Baron <dbaron@fas.harvard.edu>
9 * Christian Biesinger <cbiesinger@web.de> 9 * Christian Biesinger <cbiesinger@web.de>
10 * Randall Jesup <rjesup@wgate.com> 10 * Randall Jesup <rjesup@wgate.com>
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547 bool hasVisibleBoxDecorations() const; 547 bool hasVisibleBoxDecorations() const;
548 // Returns true if this layer has visible content (ignoring any child layers ). 548 // Returns true if this layer has visible content (ignoring any child layers ).
549 bool isVisuallyNonEmpty() const; 549 bool isVisuallyNonEmpty() const;
550 // True if this layer container renderers that paint. 550 // True if this layer container renderers that paint.
551 bool hasNonEmptyChildRenderers() const; 551 bool hasNonEmptyChildRenderers() const;
552 552
553 // FIXME: We should ASSERT(!m_hasSelfPaintingLayerDescendantDirty); here but we hit the same bugs as visible content above. 553 // FIXME: We should ASSERT(!m_hasSelfPaintingLayerDescendantDirty); here but we hit the same bugs as visible content above.
554 // Part of the issue is with subtree relayout: we don't check if our ancesto rs have some descendant flags dirty, missing some updates. 554 // Part of the issue is with subtree relayout: we don't check if our ancesto rs have some descendant flags dirty, missing some updates.
555 bool hasSelfPaintingLayerDescendant() const { return m_hasSelfPaintingLayerD escendant; } 555 bool hasSelfPaintingLayerDescendant() const { return m_hasSelfPaintingLayerD escendant; }
556 556
557 // This returns true if we have an out of flow positioned descendant whose 557 // FIXME: We should ASSERT(!m_hasOutOfFlowPositionedDescendantDirty) here. S ee above.
558 // containing block is not a descendant of ours. If this is true, we cannot
559 // automatically opt into composited scrolling since this out of flow
560 // positioned descendant would become clipped by us, possibly altering the
561 // rendering of the page.
562 // FIXME: We should ASSERT(!m_hasOutOfFlowPositionedDescendantDirty); here b ut we may hit the same bugs as visible content above.
563 bool hasOutOfFlowPositionedDescendant() const { return m_hasOutOfFlowPositio nedDescendant; } 558 bool hasOutOfFlowPositionedDescendant() const { return m_hasOutOfFlowPositio nedDescendant; }
564 559
560 bool hasUnclippedDescendant() const { return m_hasUnclippedDescendant; }
561 void updateHasUnclippedDescendant();
562
565 // Gets the nearest enclosing positioned ancestor layer (also includes 563 // Gets the nearest enclosing positioned ancestor layer (also includes
566 // the <html> layer and the root layer). 564 // the <html> layer and the root layer).
567 RenderLayer* enclosingPositionedAncestor() const; 565 RenderLayer* enclosingPositionedAncestor() const;
568 566
569 // Returns the nearest enclosing layer that is scrollable. 567 // Returns the nearest enclosing layer that is scrollable.
570 RenderLayer* enclosingScrollableLayer() const; 568 RenderLayer* enclosingScrollableLayer() const;
571 569
572 // The layer relative to which clipping rects for this layer are computed. 570 // The layer relative to which clipping rects for this layer are computed.
573 RenderLayer* clippingRootForPainting() const; 571 RenderLayer* clippingRootForPainting() const;
574 572
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845 843
846 void updateNormalFlowList(); 844 void updateNormalFlowList();
847 845
848 bool isStackingContext(const RenderStyle* style) const { return !style->hasA utoZIndex() || isRootLayer(); } 846 bool isStackingContext(const RenderStyle* style) const { return !style->hasA utoZIndex() || isRootLayer(); }
849 847
850 bool isDirtyStackingContainer() const { return m_zOrderListsDirty && isStack ingContainer(); } 848 bool isDirtyStackingContainer() const { return m_zOrderListsDirty && isStack ingContainer(); }
851 849
852 void setAncestorChainHasSelfPaintingLayerDescendant(); 850 void setAncestorChainHasSelfPaintingLayerDescendant();
853 void dirtyAncestorChainHasSelfPaintingLayerDescendantStatus(); 851 void dirtyAncestorChainHasSelfPaintingLayerDescendantStatus();
854 852
853 void setAncestorChainHasOutOfFlowPositionedDescendant();
854 void dirtyAncestorChainHasOutOfFlowPositionedDescendantStatus();
855
855 bool acceleratedCompositingForOverflowScrollEnabled() const; 856 bool acceleratedCompositingForOverflowScrollEnabled() const;
856 void updateDescendantsAreContiguousInStackingOrder(); 857 void updateDescendantsAreContiguousInStackingOrder();
857 void updateDescendantsAreContiguousInStackingOrderRecursive(const HashMap<co nst RenderLayer*, int>&, int& minIndex, int& maxIndex, int& count, bool firstIte ration); 858 void updateDescendantsAreContiguousInStackingOrderRecursive(const HashMap<co nst RenderLayer*, int>&, int& minIndex, int& maxIndex, int& count, bool firstIte ration);
858 void collectBeforePromotionZOrderList(RenderLayer* ancestorStackingContext, OwnPtr<Vector<RenderLayer*> >& posZOrderListBeforePromote, OwnPtr<Vector<RenderL ayer*> >& negZOrderListBeforePromote); 859 void collectBeforePromotionZOrderList(RenderLayer* ancestorStackingContext, OwnPtr<Vector<RenderLayer*> >& posZOrderListBeforePromote, OwnPtr<Vector<RenderL ayer*> >& negZOrderListBeforePromote);
859 void collectAfterPromotionZOrderList(RenderLayer* ancestorStackingContext, O wnPtr<Vector<RenderLayer*> >& posZOrderListAfterPromote, OwnPtr<Vector<RenderLay er*> >& negZOrderListAfterPromote); 860 void collectAfterPromotionZOrderList(RenderLayer* ancestorStackingContext, O wnPtr<Vector<RenderLayer*> >& posZOrderListAfterPromote, OwnPtr<Vector<RenderLay er*> >& negZOrderListAfterPromote);
860 861
861 void computeRepaintRects(const RenderLayerModelObject* repaintContainer, con st RenderGeometryMap* = 0); 862 void computeRepaintRects(const RenderLayerModelObject* repaintContainer, con st RenderGeometryMap* = 0);
862 void computeRepaintRectsIncludingDescendants(); 863 void computeRepaintRectsIncludingDescendants();
863 void clearRepaintRects(); 864 void clearRepaintRects();
864 865
865 void clipToRect(RenderLayer* rootLayer, GraphicsContext*, const LayoutRect& paintDirtyRect, const ClipRect&, 866 void clipToRect(RenderLayer* rootLayer, GraphicsContext*, const LayoutRect& paintDirtyRect, const ClipRect&,
866 BorderRadiusClippingRule = IncludeSelfForBorderRadius); 867 BorderRadiusClippingRule = IncludeSelfForBorderRadius);
867 void restoreClip(GraphicsContext*, const LayoutRect& paintDirtyRect, const C lipRect&); 868 void restoreClip(GraphicsContext*, const LayoutRect& paintDirtyRect, const C lipRect&);
868 869
869 bool shouldRepaintAfterLayout() const; 870 bool shouldRepaintAfterLayout() const;
870 871
871 void updateSelfPaintingLayer(); 872 void updateSelfPaintingLayer();
872 void updateIsNormalFlowOnly(); 873 void updateIsNormalFlowOnly();
873 void updateVisibilityAfterStyleChange(const RenderStyle* oldStyle); 874 void updateVisibilityAfterStyleChange(const RenderStyle* oldStyle);
874 void updateStackingContextsAfterStyleChange(const RenderStyle* oldStyle); 875 void updateStackingContextsAfterStyleChange(const RenderStyle* oldStyle);
875 876
876 void updateScrollbarsAfterStyleChange(const RenderStyle* oldStyle); 877 void updateScrollbarsAfterStyleChange(const RenderStyle* oldStyle);
877 void updateScrollbarsAfterLayout(); 878 void updateScrollbarsAfterLayout();
878 879
879 void setAncestorChainHasOutOfFlowPositionedDescendant(RenderObject* containi ngBlock);
880 void dirtyAncestorChainHasOutOfFlowPositionedDescendantStatus();
881 void updateOutOfFlowPositioned(const RenderStyle* oldStyle); 880 void updateOutOfFlowPositioned(const RenderStyle* oldStyle);
882 881
883 void updateNeedsCompositedScrolling(); 882 virtual void updateNeedsCompositedScrolling() OVERRIDE;
883 void setNeedsCompositedScrolling(bool);
884 void didUpdateNeedsCompositedScrolling(); 884 void didUpdateNeedsCompositedScrolling();
885 885
886 // Returns true if the position changed. 886 // Returns true if the position changed.
887 bool updateLayerPosition(); 887 bool updateLayerPosition();
888 888
889 void updateLayerPositions(RenderGeometryMap* = 0, UpdateLayerPositionsFlags = defaultFlags); 889 void updateLayerPositions(RenderGeometryMap* = 0, UpdateLayerPositionsFlags = defaultFlags);
890 890
891 enum UpdateLayerPositionsAfterScrollFlag { 891 enum UpdateLayerPositionsAfterScrollFlag {
892 NoFlag = 0, 892 NoFlag = 0,
893 IsOverflowScroll = 1 << 0, 893 IsOverflowScroll = 1 << 0,
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1040 void updateCompositingLayersAfterScroll(); 1040 void updateCompositingLayersAfterScroll();
1041 1041
1042 IntSize scrollbarOffset(const Scrollbar*) const; 1042 IntSize scrollbarOffset(const Scrollbar*) const;
1043 1043
1044 void updateResizerAreaSet(); 1044 void updateResizerAreaSet();
1045 void updateScrollableAreaSet(bool hasOverflow); 1045 void updateScrollableAreaSet(bool hasOverflow);
1046 1046
1047 void dirtyAncestorChainVisibleDescendantStatus(); 1047 void dirtyAncestorChainVisibleDescendantStatus();
1048 void setAncestorChainHasVisibleDescendant(); 1048 void setAncestorChainHasVisibleDescendant();
1049 1049
1050 void updateDescendantDependentFlags(HashSet<const RenderObject*>* outOfFlowD escendantContainingBlocks = 0); 1050 void updateDescendantDependentFlags();
1051 1051
1052 // This flag is computed by RenderLayerCompositor, which knows more about 3d hierarchies than we do. 1052 // This flag is computed by RenderLayerCompositor, which knows more about 3d hierarchies than we do.
1053 void setHas3DTransformedDescendant(bool b) { m_has3DTransformedDescendant = b; } 1053 void setHas3DTransformedDescendant(bool b) { m_has3DTransformedDescendant = b; }
1054 bool has3DTransformedDescendant() const { return m_has3DTransformedDescendan t; } 1054 bool has3DTransformedDescendant() const { return m_has3DTransformedDescendan t; }
1055 1055
1056 void dirty3DTransformedDescendantStatus(); 1056 void dirty3DTransformedDescendantStatus();
1057 // Both updates the status, and returns true if descendants of this have 3d. 1057 // Both updates the status, and returns true if descendants of this have 3d.
1058 bool update3DTransformedDescendantStatus(); 1058 bool update3DTransformedDescendantStatus();
1059 1059
1060 void createReflection(); 1060 void createReflection();
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1139 bool m_normalFlowListDirty: 1; 1139 bool m_normalFlowListDirty: 1;
1140 bool m_isNormalFlowOnly : 1; 1140 bool m_isNormalFlowOnly : 1;
1141 1141
1142 bool m_isSelfPaintingLayer : 1; 1142 bool m_isSelfPaintingLayer : 1;
1143 1143
1144 // If have no self-painting descendants, we don't have to walk our children during painting. This can lead to 1144 // If have no self-painting descendants, we don't have to walk our children during painting. This can lead to
1145 // significant savings, especially if the tree has lots of non-self-painting layers grouped together (e.g. table cells). 1145 // significant savings, especially if the tree has lots of non-self-painting layers grouped together (e.g. table cells).
1146 bool m_hasSelfPaintingLayerDescendant : 1; 1146 bool m_hasSelfPaintingLayerDescendant : 1;
1147 bool m_hasSelfPaintingLayerDescendantDirty : 1; 1147 bool m_hasSelfPaintingLayerDescendantDirty : 1;
1148 1148
1149 // If we have no out of flow positioned descendants and no non-descendant
1150 // appears between our descendants in stacking order, then we may become a
1151 // stacking context.
1152 bool m_hasOutOfFlowPositionedDescendant : 1; 1149 bool m_hasOutOfFlowPositionedDescendant : 1;
1153 bool m_hasOutOfFlowPositionedDescendantDirty : 1; 1150 bool m_hasOutOfFlowPositionedDescendantDirty : 1;
1154 1151
1152 // This is true if we have an out-of-flow positioned descendant whose
1153 // containing block is our ancestor. If this is the case, the descendant
1154 // may fall outside of our clip preventing things like opting into
1155 // composited scrolling (which causes clipping of all descendants).
1156 bool m_hasUnclippedDescendant : 1;
1157
1155 bool m_needsCompositedScrolling : 1; 1158 bool m_needsCompositedScrolling : 1;
1156 1159
1157 // If this is true, then no non-descendant appears between any of our 1160 // If this is true, then no non-descendant appears between any of our
1158 // descendants in stacking order. This is one of the requirements of being 1161 // descendants in stacking order. This is one of the requirements of being
1159 // able to safely become a stacking context. 1162 // able to safely become a stacking context.
1160 bool m_descendantsAreContiguousInStackingOrder : 1; 1163 bool m_descendantsAreContiguousInStackingOrder : 1;
1161 bool m_descendantsAreContiguousInStackingOrderDirty : 1; 1164 bool m_descendantsAreContiguousInStackingOrderDirty : 1;
1162 1165
1163 const bool m_isRootLayer : 1; 1166 const bool m_isRootLayer : 1;
1164 1167
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1335 1338
1336 } // namespace WebCore 1339 } // namespace WebCore
1337 1340
1338 #ifndef NDEBUG 1341 #ifndef NDEBUG
1339 // Outside the WebCore namespace for ease of invocation from gdb. 1342 // Outside the WebCore namespace for ease of invocation from gdb.
1340 void showLayerTree(const WebCore::RenderLayer*); 1343 void showLayerTree(const WebCore::RenderLayer*);
1341 void showLayerTree(const WebCore::RenderObject*); 1344 void showLayerTree(const WebCore::RenderObject*);
1342 #endif 1345 #endif
1343 1346
1344 #endif // RenderLayer_h 1347 #endif // RenderLayer_h
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