/*   明るくする ImageFilter  Ver 0.10   */
/*                                      */
/*                                      */
/*   by Atsushi                98/4/9   */


package net.antun.lib.awt.image;

import java.awt.image.RGBImageFilter;


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

	private int deltaR,deltaB,deltaG;

	/*   ---   Constructor   ---   */

	public BrightImageFilter(int delta)
	{
		this.deltaR=delta;
		this.deltaG=delta;
		this.deltaB=delta;
		
		canFilterIndexColorModel=true;
	}

	public BrightImageFilter(int deltaR,int deltaG,int deltaB)
	{
		this.deltaR=deltaR;
		this.deltaG=deltaG;
		this.deltaB=deltaB;
		
		canFilterIndexColorModel=true;
	}

	/*   ---   フィルタリング   ---   */

	public int filterRGB(int x,int y,int rgb)
	{
		int r,g,b;
	
		r=Math.min(Math.max(((rgb>>16) & 0xff)+deltaR,0),255);
		g=Math.min(Math.max(((rgb>> 8) & 0xff)+deltaG,0),255);
		b=Math.min(Math.max(((rgb>> 0) & 0xff)+deltaB,0),255);
		return ((rgb & 0xFF000000) | (r<<16) | (g<<8) | (b<<0));
	}

	/*   ---   文字列化   ---   */

	public String toString()
	{
		return getClass().getName()+"[delta(R)="+deltaR+",delta(G)="+deltaG+
		                            ",delta(B)="+deltaB+"]";
	}
}