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Issue 14741004: NOT FOR REVIEW - Update comp-scrolling state at a well defined point in the pipeline. (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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542 // Part of the issue is with subtree relayout: we don't check if our ancesto rs have some descendant flags dirty, missing some updates. 542 // Part of the issue is with subtree relayout: we don't check if our ancesto rs have some descendant flags dirty, missing some updates.
543 bool hasSelfPaintingLayerDescendant() const { return m_hasSelfPaintingLayerD escendant; } 543 bool hasSelfPaintingLayerDescendant() const { return m_hasSelfPaintingLayerD escendant; }
544 544
545 // This returns true if we have an out of flow positioned descendant whose 545 // This returns true if we have an out of flow positioned descendant whose
546 // containing block is not a descendant of ours. If this is true, we cannot 546 // containing block is not a descendant of ours. If this is true, we cannot
547 // automatically opt into composited scrolling since this out of flow 547 // automatically opt into composited scrolling since this out of flow
548 // positioned descendant would become clipped by us, possibly altering the 548 // positioned descendant would become clipped by us, possibly altering the
549 // rendering of the page. 549 // rendering of the page.
550 // FIXME: We should ASSERT(!m_hasOutOfFlowPositionedDescendantDirty); here b ut we may hit the same bugs as visible content above. 550 // FIXME: We should ASSERT(!m_hasOutOfFlowPositionedDescendantDirty); here b ut we may hit the same bugs as visible content above.
551 bool hasOutOfFlowPositionedDescendant() const { return m_hasOutOfFlowPositio nedDescendant; } 551 bool hasOutOfFlowPositionedDescendant() const { return m_hasOutOfFlowPositio nedDescendant; }
552 void updateHasOutOfFlowPositionedDescendant(HashSet<const RenderObject*>* co ntainingBlocks = 0);
552 553
553 // Gets the nearest enclosing positioned ancestor layer (also includes 554 // Gets the nearest enclosing positioned ancestor layer (also includes
554 // the <html> layer and the root layer). 555 // the <html> layer and the root layer).
555 RenderLayer* enclosingPositionedAncestor() const; 556 RenderLayer* enclosingPositionedAncestor() const;
556 557
557 // Returns the nearest enclosing layer that is scrollable. 558 // Returns the nearest enclosing layer that is scrollable.
558 RenderLayer* enclosingScrollableLayer() const; 559 RenderLayer* enclosingScrollableLayer() const;
559 560
560 // The layer relative to which clipping rects for this layer are computed. 561 // The layer relative to which clipping rects for this layer are computed.
561 RenderLayer* clippingRootForPainting() const; 562 RenderLayer* clippingRootForPainting() const;
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807 }; 808 };
808 809
809 void setViewportConstrainedNotCompositedReason(ViewportConstrainedNotComposi tedReason reason) { m_compositingProperties.viewportConstrainedNotCompositedReas on = reason; } 810 void setViewportConstrainedNotCompositedReason(ViewportConstrainedNotComposi tedReason reason) { m_compositingProperties.viewportConstrainedNotCompositedReas on = reason; }
810 ViewportConstrainedNotCompositedReason viewportConstrainedNotCompositedReaso n() const { return static_cast<ViewportConstrainedNotCompositedReason>(m_composi tingProperties.viewportConstrainedNotCompositedReason); } 811 ViewportConstrainedNotCompositedReason viewportConstrainedNotCompositedReaso n() const { return static_cast<ViewportConstrainedNotCompositedReason>(m_composi tingProperties.viewportConstrainedNotCompositedReason); }
811 812
812 bool isOutOfFlowRenderFlowThread() const { return renderer()->isOutOfFlowRen derFlowThread(); } 813 bool isOutOfFlowRenderFlowThread() const { return renderer()->isOutOfFlowRen derFlowThread(); }
813 814
814 enum PaintOrderListType {BeforePromote, AfterPromote}; 815 enum PaintOrderListType {BeforePromote, AfterPromote};
815 void computePaintOrderList(PaintOrderListType type, Vector<RefPtr<Node> >&); 816 void computePaintOrderList(PaintOrderListType type, Vector<RefPtr<Node> >&);
816 817
818 enum ForceNeedsCompositedScrollingMode {
819 DoNotForceCompositedScrolling = 0,
820 ForceCompositedScrollingOn,
821 ForceCompositedScrollingOff
822 };
823 void setForceNeedsCompositedScrolling(ForceNeedsCompositedScrollingMode mode );
824
817 private: 825 private:
818 enum CollectLayersBehavior { StopAtStackingContexts, StopAtStackingContainer s }; 826 enum CollectLayersBehavior { StopAtStackingContexts, StopAtStackingContainer s };
819 827
820 void updateZOrderLists(); 828 void updateZOrderLists();
821 void rebuildZOrderLists(); 829 void rebuildZOrderLists();
822 // See the comment for collectLayers for information about the layerToForceA sStackingContainer parameter. 830 // See the comment for collectLayers for information about the layerToForceA sStackingContainer parameter.
823 void rebuildZOrderLists(CollectLayersBehavior, OwnPtr<Vector<RenderLayer*> > &, OwnPtr<Vector<RenderLayer*> >&, const RenderLayer* layerToForceAsStackingCont ainer = 0); 831 void rebuildZOrderLists(CollectLayersBehavior, OwnPtr<Vector<RenderLayer*> > &, OwnPtr<Vector<RenderLayer*> >&, const RenderLayer* layerToForceAsStackingCont ainer = 0);
824 void clearZOrderLists(); 832 void clearZOrderLists();
825 833
826 void updateNormalFlowList(); 834 void updateNormalFlowList();
827 835
828 bool isStackingContext(const RenderStyle* style) const { return !style->hasA utoZIndex() || isRootLayer(); } 836 bool isStackingContext(const RenderStyle* style) const { return !style->hasA utoZIndex() || isRootLayer(); }
829 837
830 bool isDirtyStackingContainer() const { return m_zOrderListsDirty && isStack ingContainer(); } 838 bool isDirtyStackingContainer() const { return m_zOrderListsDirty && isStack ingContainer(); }
831 839
832 void setAncestorChainHasSelfPaintingLayerDescendant(); 840 void setAncestorChainHasSelfPaintingLayerDescendant();
833 void dirtyAncestorChainHasSelfPaintingLayerDescendantStatus(); 841 void dirtyAncestorChainHasSelfPaintingLayerDescendantStatus();
834 842
835 bool acceleratedCompositingForOverflowScrollEnabled() const; 843 bool acceleratedCompositingForOverflowScrollEnabled() const;
836 void updateDescendantsAreContiguousInStackingOrder(); 844 void updateCanBeStackingContainer(RenderLayer*);
837 void updateDescendantsAreContiguousInStackingOrderRecursive(const HashMap<co nst RenderLayer*, int>&, int& minIndex, int& maxIndex, int& count, bool firstIte ration); 845 void updateCanBeStackingContainerRecursively(RenderLayer*);
838 void collectBeforePromotionZOrderList(RenderLayer* ancestorStackingContext, OwnPtr<Vector<RenderLayer*> >& posZOrderListBeforePromote, OwnPtr<Vector<RenderL ayer*> >& negZOrderListBeforePromote); 846 void collectBeforePromotionZOrderList(RenderLayer* ancestorStackingContext, OwnPtr<Vector<RenderLayer*> >& posZOrderListBeforePromote, OwnPtr<Vector<RenderL ayer*> >& negZOrderListBeforePromote);
839 void collectAfterPromotionZOrderList(RenderLayer* ancestorStackingContext, O wnPtr<Vector<RenderLayer*> >& posZOrderListAfterPromote, OwnPtr<Vector<RenderLay er*> >& negZOrderListAfterPromote); 847 void collectAfterPromotionZOrderList(RenderLayer* ancestorStackingContext, O wnPtr<Vector<RenderLayer*> >& posZOrderListAfterPromote, OwnPtr<Vector<RenderLay er*> >& negZOrderListAfterPromote);
840 848
841 void computeRepaintRects(const RenderLayerModelObject* repaintContainer, con st RenderGeometryMap* = 0); 849 void computeRepaintRects(const RenderLayerModelObject* repaintContainer, con st RenderGeometryMap* = 0);
842 void computeRepaintRectsIncludingDescendants(); 850 void computeRepaintRectsIncludingDescendants();
843 void clearRepaintRects(); 851 void clearRepaintRects();
844 852
845 void clipToRect(RenderLayer* rootLayer, GraphicsContext*, const LayoutRect& paintDirtyRect, const ClipRect&, 853 void clipToRect(RenderLayer* rootLayer, GraphicsContext*, const LayoutRect& paintDirtyRect, const ClipRect&,
846 BorderRadiusClippingRule = IncludeSelfForBorderRadius); 854 BorderRadiusClippingRule = IncludeSelfForBorderRadius);
847 void restoreClip(GraphicsContext*, const LayoutRect& paintDirtyRect, const C lipRect&); 855 void restoreClip(GraphicsContext*, const LayoutRect& paintDirtyRect, const C lipRect&);
848 856
849 bool shouldRepaintAfterLayout() const; 857 bool shouldRepaintAfterLayout() const;
850 858
851 void updateSelfPaintingLayer(); 859 void updateSelfPaintingLayer();
852 void updateIsNormalFlowOnly(); 860 void updateIsNormalFlowOnly();
853 void updateVisibilityAfterStyleChange(const RenderStyle* oldStyle); 861 void updateVisibilityAfterStyleChange(const RenderStyle* oldStyle);
854 void updateStackingContextsAfterStyleChange(const RenderStyle* oldStyle); 862 void updateStackingContextsAfterStyleChange(const RenderStyle* oldStyle);
855 863
856 void updateScrollbarsAfterStyleChange(const RenderStyle* oldStyle); 864 void updateScrollbarsAfterStyleChange(const RenderStyle* oldStyle);
857 void updateScrollbarsAfterLayout(); 865 void updateScrollbarsAfterLayout();
858 866
859 void setAncestorChainHasOutOfFlowPositionedDescendant(RenderObject* containi ngBlock);
860 void dirtyAncestorChainHasOutOfFlowPositionedDescendantStatus();
861 void updateOutOfFlowPositioned(const RenderStyle* oldStyle); 867 void updateOutOfFlowPositioned(const RenderStyle* oldStyle);
862 868
863 void updateNeedsCompositedScrolling(); 869 void updateNeedsCompositedScrolling();
870 void setNeedsCompositedScrolling(bool);
871
872 void didSetNeedsCompositedScrolling();
864 873
865 // Returns true if the position changed. 874 // Returns true if the position changed.
866 bool updateLayerPosition(); 875 bool updateLayerPosition();
867 876
868 void updateLayerPositions(RenderGeometryMap* = 0, UpdateLayerPositionsFlags = defaultFlags); 877 void updateLayerPositions(RenderGeometryMap* = 0, UpdateLayerPositionsFlags = defaultFlags);
869 878
870 enum UpdateLayerPositionsAfterScrollFlag { 879 enum UpdateLayerPositionsAfterScrollFlag {
871 NoFlag = 0, 880 NoFlag = 0,
872 IsOverflowScroll = 1 << 0, 881 IsOverflowScroll = 1 << 0,
873 HasSeenViewportConstrainedAncestor = 1 << 1, 882 HasSeenViewportConstrainedAncestor = 1 << 1,
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1018 void scrollTo(int, int); 1027 void scrollTo(int, int);
1019 void updateCompositingLayersAfterScroll(); 1028 void updateCompositingLayersAfterScroll();
1020 1029
1021 IntSize scrollbarOffset(const Scrollbar*) const; 1030 IntSize scrollbarOffset(const Scrollbar*) const;
1022 1031
1023 void updateScrollableAreaSet(bool hasOverflow); 1032 void updateScrollableAreaSet(bool hasOverflow);
1024 1033
1025 void dirtyAncestorChainVisibleDescendantStatus(); 1034 void dirtyAncestorChainVisibleDescendantStatus();
1026 void setAncestorChainHasVisibleDescendant(); 1035 void setAncestorChainHasVisibleDescendant();
1027 1036
1028 void updateDescendantDependentFlags(HashSet<const RenderObject*>* outOfFlowD escendantContainingBlocks = 0); 1037 void updateDescendantDependentFlags();
1029 1038
1030 // This flag is computed by RenderLayerCompositor, which knows more about 3d hierarchies than we do. 1039 // This flag is computed by RenderLayerCompositor, which knows more about 3d hierarchies than we do.
1031 void setHas3DTransformedDescendant(bool b) { m_has3DTransformedDescendant = b; } 1040 void setHas3DTransformedDescendant(bool b) { m_has3DTransformedDescendant = b; }
1032 bool has3DTransformedDescendant() const { return m_has3DTransformedDescendan t; } 1041 bool has3DTransformedDescendant() const { return m_has3DTransformedDescendan t; }
1033 1042
1034 void dirty3DTransformedDescendantStatus(); 1043 void dirty3DTransformedDescendantStatus();
1035 // Both updates the status, and returns true if descendants of this have 3d. 1044 // Both updates the status, and returns true if descendants of this have 3d.
1036 bool update3DTransformedDescendantStatus(); 1045 bool update3DTransformedDescendantStatus();
1037 1046
1038 void createReflection(); 1047 void createReflection();
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1121 1130
1122 // If have no self-painting descendants, we don't have to walk our children during painting. This can lead to 1131 // If have no self-painting descendants, we don't have to walk our children during painting. This can lead to
1123 // significant savings, especially if the tree has lots of non-self-painting layers grouped together (e.g. table cells). 1132 // significant savings, especially if the tree has lots of non-self-painting layers grouped together (e.g. table cells).
1124 bool m_hasSelfPaintingLayerDescendant : 1; 1133 bool m_hasSelfPaintingLayerDescendant : 1;
1125 bool m_hasSelfPaintingLayerDescendantDirty : 1; 1134 bool m_hasSelfPaintingLayerDescendantDirty : 1;
1126 1135
1127 // If we have no out of flow positioned descendants and no non-descendant 1136 // If we have no out of flow positioned descendants and no non-descendant
1128 // appears between our descendants in stacking order, then we may become a 1137 // appears between our descendants in stacking order, then we may become a
1129 // stacking context. 1138 // stacking context.
1130 bool m_hasOutOfFlowPositionedDescendant : 1; 1139 bool m_hasOutOfFlowPositionedDescendant : 1;
1131 bool m_hasOutOfFlowPositionedDescendantDirty : 1;
1132 1140
1141 ForceNeedsCompositedScrollingMode m_forceNeedsCompositedScrolling;
1133 bool m_needsCompositedScrolling : 1; 1142 bool m_needsCompositedScrolling : 1;
1143 bool m_updatingNeedsCompositedScrolling : 1;
1134 1144
1135 // If this is true, then no non-descendant appears between any of our 1145 // If this is true, then no non-descendant appears between any of our
1136 // descendants in stacking order. This is one of the requirements of being 1146 // descendants in stacking order. This is one of the requirements of being
1137 // able to safely become a stacking context. 1147 // able to safely become a stacking context.
1138 bool m_descendantsAreContiguousInStackingOrder : 1; 1148 bool m_canBePromotedToStackingContainer : 1;
1139 bool m_descendantsAreContiguousInStackingOrderDirty : 1; 1149 bool m_updatingCanBePromotedToStackingContainer : 1;
1140 1150
1141 const bool m_isRootLayer : 1; 1151 const bool m_isRootLayer : 1;
1142 1152
1143 bool m_usedTransparency : 1; // Tracks whether we need to close a transparen t layer, i.e., whether 1153 bool m_usedTransparency : 1; // Tracks whether we need to close a transparen t layer, i.e., whether
1144 // we ended up painting this layer or any desce ndants (and therefore need to 1154 // we ended up painting this layer or any desce ndants (and therefore need to
1145 // blend). 1155 // blend).
1146 bool m_paintingInsideReflection : 1; // A state bit tracking if we are pain ting inside a replica. 1156 bool m_paintingInsideReflection : 1; // A state bit tracking if we are pain ting inside a replica.
1147 bool m_inOverflowRelayout : 1; 1157 bool m_inOverflowRelayout : 1;
1148 unsigned m_repaintStatus : 2; // RepaintStatus 1158 unsigned m_repaintStatus : 2; // RepaintStatus
1149 1159
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1311 1321
1312 } // namespace WebCore 1322 } // namespace WebCore
1313 1323
1314 #ifndef NDEBUG 1324 #ifndef NDEBUG
1315 // Outside the WebCore namespace for ease of invocation from gdb. 1325 // Outside the WebCore namespace for ease of invocation from gdb.
1316 void showLayerTree(const WebCore::RenderLayer*); 1326 void showLayerTree(const WebCore::RenderLayer*);
1317 void showLayerTree(const WebCore::RenderObject*); 1327 void showLayerTree(const WebCore::RenderObject*);
1318 #endif 1328 #endif
1319 1329
1320 #endif // RenderLayer_h 1330 #endif // RenderLayer_h
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