     /// Saves the current state of the chart to the camera roll
     public func saveToCameraRoll()
     {
-        UIImageWriteToSavedPhotosAlbum(getChartImage(), nil, nil, nil);
+        UIImageWriteToSavedPhotosAlbum(getChartImage(transparent: false), nil, nil, nil);
     }
     
     internal typealias VoidClosureType = () -> ()

    /// :returns: true if the image was saved successfully
    public func saveToPath(path: String, format: ImageFormat, compressionQuality: Float) -> Bool
    {
        var image = getChartImage();

        var imageData: NSData!;
        switch (format)

    }
    
    /// Returns the bitmap that represents the chart.
    public func getChartImage(#transparent: Bool) -> UIImage
    {
        UIGraphicsBeginImageContextWithOptions(bounds.size, opaque || !transparent, UIScreen.mainScreen().scale);
        
        var context = UIGraphicsGetCurrentContext();
        var rect = CGRect(origin: CGPoint(x: 0, y: 0), size: bounds.size);
        
        if (opaque || !transparent)
        {
            // Background color may be partially transparent, we must fill with white if we want to output an opaque image
            CGContextSetFillColorWithColor(context, UIColor.whiteColor().CGColor);
            CGContextFillRect(context, rect);
            
            if (self.backgroundColor !== nil)
            {
                CGContextSetFillColorWithColor(context, self.backgroundColor?.CGColor);
                CGContextFillRect(context, rect);
            }
        }
        
        layer.renderInContext(UIGraphicsGetCurrentContext());
        
