/*   透明化 ImageFilter  Ver 0.40   */
/*                                  */
/*                                  */
/*   by Atsushi            98/4/9   */


package net.antun.lib.awt.image;

import java.awt.image.RGBImageFilter;


public class AlphaImageFilter extends RGBImageFilter
{
	/*   ---   Field   ---   */

	private int alpha;

	/*   ---   Constructor   ---   */

	public AlphaImageFilter(int alpha)
	{
		this.alpha=alpha;
		
		canFilterIndexColorModel=true;
	}

	public AlphaImageFilter()
	{
		this(0);
	}

	/*   ---   フィルタリング   ---   */

	public int filterRGB(int x,int y,int rgb)
	{
		return (alpha*0x01000000) | (rgb & 0x00ffffff);
	}

	/*   ---   文字列化   ---   */

	public String toString()
	{
		return getClass().getName()+"[alpha="+alpha+"]";
	}
}