mix-blend-mode implementation for accelerated layers - blink part

Source/core/rendering/RenderLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 339 matching lines @@
     bool hasCompositedMask() const;
     bool hasCompositedClippingMask() const;
     bool needsCompositedScrolling() const { return m_scrollableArea && m_scrollableArea->needsCompositedScrolling(); }
 
     RenderLayer* scrollParent() const;
     RenderLayer* clipParent() const;
 
     bool needsCompositingLayersRebuiltForClip(const RenderStyle* oldStyle, const RenderStyle* newStyle) const;
     bool needsCompositingLayersRebuiltForOverflow(const RenderStyle* oldStyle, const RenderStyle* newStyle) const;
     bool needsCompositingLayersRebuiltForFilters(const RenderStyle* oldStyle, const RenderStyle* newStyle, bool didPaintWithFilters) const;
+    bool needsCompositingLayersRebuiltForBlending(const RenderStyle* oldStyle, const RenderStyle* newStyle) const;
 
     bool paintsWithTransparency(PaintBehavior paintBehavior) const
     {
         return isTransparent() && ((paintBehavior & PaintBehaviorFlattenCompositingLayers) || compositingState() != PaintsIntoOwnBacking);
     }
 
     bool paintsWithTransform(PaintBehavior) const;
 
     // Returns true if background phase is painted opaque in the given rect.
     // The query rect is given in local coordinates.
@@ skipping 212 matching lines @@
     RenderLayer* enclosingTransformedAncestor() const;
 
     void updatePagination();
 
     // FIXME: Temporary. Remove when new columns come online.
     bool useRegionBasedColumns() const;
 
     bool hasCompositingDescendant() const { return m_compositingProperties.hasCompositingDescendant; }
     void setHasCompositingDescendant(bool b)  { m_compositingProperties.hasCompositingDescendant = b; }
 
+    bool shouldIsolateCompositedDescendants() const { return m_compositingProperties.shouldIsolateCompositedDescendants; }
+    void setShouldIsolateCompositedDescendants(bool b)  { m_compositingProperties.shouldIsolateCompositedDescendants = b; }
+
     void setCompositingReasons(CompositingReasons reasons) { m_compositingProperties.compositingReasons = reasons; }
     CompositingReasons compositingReasons() const { return m_compositingProperties.compositingReasons; }
 
     friend class CompositedLayerMapping;
     friend class RenderLayerCompositor;
     friend class RenderLayerModelObject;
 
 protected:
     unsigned m_isSelfPaintingLayer : 1;
 
@@ skipping 69 matching lines @@
     OwnPtr<TransformationMatrix> m_transform;
 
     // Pointer to the enclosing RenderLayer that caused us to be paginated. It is 0 if we are not paginated.
     RenderLayer* m_enclosingPaginationLayer;
 
     // Properties that are computed while updating compositing layers. These values may be dirty/invalid if
     // compositing status is not up-to-date before using them.
     struct CompositingProperties {
         CompositingProperties()
             : hasCompositingDescendant(false)
+            , shouldIsolateCompositedDescendants(false)
             , viewportConstrainedNotCompositedReason(NoNotCompositedReason)
             , compositingReasons(CompositingReasonNone)
         { }
 
         // Used only while determining what layers should be composited. Applies to the tree of z-order lists.
         bool hasCompositingDescendant : 1;
 
+        // Should be for stacking contexts having unisolated blending descendants.
+        bool shouldIsolateCompositedDescendants : 1;
+
         // The reason, if any exists, that a fixed-position layer is chosen not to be composited.
         unsigned viewportConstrainedNotCompositedReason : 2;
 
         // Once computed, indicates all that a layer needs to become composited using the CompositingReasons enum bitfield.
         CompositingReasons compositingReasons;
     };
 
     CompositingProperties m_compositingProperties;
 
 private:
@@ skipping 17 matching lines @@
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const WebCore::RenderLayer*);
 void showLayerTree(const WebCore::RenderObject*);
 #endif
 
 #endif // RenderLayer_h