DrawingUtils.java

package mediabrowser.model.drawing;

/** 
 Class DrawingUtils
*/
public final class DrawingUtils
{
	/** 
	 Resizes a set of dimensions
	 
	 @param currentWidth Width of the current.
	 @param currentHeight Height of the current.
	 @param scaleFactor The scale factor.
	 @return ImageSize.
	*/
	public static ImageSize Scale(double currentWidth, double currentHeight, double scaleFactor)
	{
		ImageSize tempVar = new ImageSize();
		tempVar.setWidth(currentWidth);
		tempVar.setHeight(currentHeight);
		return Scale(tempVar.clone(), scaleFactor);
	}

	/** 
	 Resizes a set of dimensions
	 
	 @param size The size.
	 @param scaleFactor The scale factor.
	 @return ImageSize.
	*/
	public static ImageSize Scale(ImageSize size, double scaleFactor)
	{
		double newWidth = size.getWidth() * scaleFactor;

		return Resize(size.getWidth(), size.getHeight(), newWidth, null, null, null);
	}

	/** 
	 Resizes a set of dimensions
	 
	 @param currentWidth Width of the current.
	 @param currentHeight Height of the current.
	 @param width The width.
	 @param height The height.
	 @param maxWidth A max fixed width, if desired
	 @param maxHeight A max fixed height, if desired
	 @return ImageSize.
	*/
	public static ImageSize Resize(double currentWidth, double currentHeight, Double width, Double height, Double maxWidth, Double maxHeight)
	{
		ImageSize tempVar = new ImageSize();
		tempVar.setWidth(currentWidth);
		tempVar.setHeight(currentHeight);
		return Resize(tempVar.clone(), width, height, maxWidth, maxHeight);
	}

	/** 
	 Resizes a set of dimensions
	 
	 @param size The original size object
	 @param width A new fixed width, if desired
	 @param height A new fixed height, if desired
	 @param maxWidth A max fixed width, if desired
	 @param maxHeight A max fixed height, if desired
	 @return A new size object
	*/
	public static ImageSize Resize(ImageSize size, Double width, Double height, Double maxWidth, Double maxHeight)
	{
		double newWidth = size.getWidth();
		double newHeight = size.getHeight();

		if (width != null && height != null)
		{
			newWidth = width;
			newHeight = height;
		}

		else if (height != null)
		{
			newWidth = GetNewWidth(newHeight, newWidth, height);
			newHeight = height;
		}

		else if (width != null)
		{
			newHeight = GetNewHeight(newHeight, newWidth, width);
			newWidth = width;
		}

		if (maxHeight != null && maxHeight < newHeight)
		{
			newWidth = GetNewWidth(newHeight, newWidth, maxHeight);
			newHeight = maxHeight;
		}

		if (maxWidth != null && maxWidth < newWidth)
		{
			newHeight = GetNewHeight(newHeight, newWidth, maxWidth);
			newWidth = maxWidth;
		}

		ImageSize tempVar = new ImageSize();
		tempVar.setWidth(newWidth);
		tempVar.setHeight(newHeight);
		return tempVar;
	}

	/** 
	 Gets the new width.
	 
	 @param currentHeight Height of the current.
	 @param currentWidth Width of the current.
	 @param newHeight The new height.
	 @return System.Double.
	*/
	private static double GetNewWidth(double currentHeight, double currentWidth, double newHeight)
	{
		double scaleFactor = newHeight;
		scaleFactor /= currentHeight;
		scaleFactor *= currentWidth;

		return scaleFactor;
	}

	/** 
	 Gets the new height.
	 
	 @param currentHeight Height of the current.
	 @param currentWidth Width of the current.
	 @param newWidth The new width.
	 @return System.Double.
	*/
	private static double GetNewHeight(double currentHeight, double currentWidth, double newWidth)
	{
		double scaleFactor = newWidth;
		scaleFactor /= currentWidth;
		scaleFactor *= currentHeight;

		return scaleFactor;
	}
}