1 files changed, 9 insertions, 1 deletions
diff --git a/Source/WebCore/platform/graphics/GraphicsLayerClient.h b/Source/WebCore/platform/graphics/GraphicsLayerClient.h
index 7efee0e65..3e105ce6b 100644
--- a/Source/WebCore/platform/graphics/GraphicsLayerClient.h
+++ b/Source/WebCore/platform/graphics/GraphicsLayerClient.h
@@ -30,11 +30,12 @@
 
 namespace WebCore {
 
+class FloatPoint;
 class GraphicsContext;
 class GraphicsLayer;
 class IntPoint;
 class IntRect;
-class FloatPoint;
+class TransformationMatrix;
 
 enum GraphicsLayerPaintingPhaseFlags {
     GraphicsLayerPaintBackground = (1 << 0),
@@ -66,9 +67,16 @@ public:
     // to appear on the screen.
     virtual void notifyFlushRequired(const GraphicsLayer*) = 0;
     
+    // Notification that this layer requires a flush before the next display refresh.
+    virtual void notifyFlushBeforeDisplayRefresh(const GraphicsLayer*) { }
+
     virtual void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& inClip) = 0;
     virtual void didCommitChangesForLayer(const GraphicsLayer*) const { }
 
+    // Provides current transform (taking transform-origin and animations into account). Input matrix has been
+    // initialized to identity already. Returns false if the layer has no transform.
+    virtual bool getCurrentTransform(const GraphicsLayer*, TransformationMatrix&) const { return false; }
+
     // Multiplier for backing store size, related to high DPI.
     virtual float deviceScaleFactor() const { return 1; }
     // Page scale factor.