452     TBool CollectPaintedRegion(TRegion& aRecursivePaintRegion, TInt aExcludeCanvasFlags) const;

   452     TBool CollectPaintedRegion(TRegion& aRecursivePaintRegion, TInt aExcludeCanvasFlags) const;

   453     TBool CollectRecursivePaintedRegion(TRegion& aRecursivePaintRegion, TInt aExcludeCanvasFlags) const;

   453     TBool CollectRecursivePaintedRegion(TRegion& aRecursivePaintRegion, TInt aExcludeCanvasFlags) const;

   454     

   454     

   455     TBool CanSkipDrawing() const;

   455     TBool CanSkipDrawing() const;

   456     TBool KeepNoCache() const;

   456     TBool KeepNoCache() const;

   457 

   458 

   458 private: 

   459 private: 

   459 

   460 

   460     struct THuiCanvasVisualData;

   461     struct THuiCanvasVisualData;

   461     THuiCanvasVisualData* iCanvasVisualData;

   462     THuiCanvasVisualData* iCanvasVisualData;