/*   モザイク化 ImageFilter  Ver 0.10   */
/*                                      */
/*                                      */
/*   by Atsushi             2005/8/20   */


package net.antun.lib.awt.image;

import java.awt.Dimension;
import java.awt.image.ColorModel;


public class MosaicImageFilter extends SinglepassImageFilter
{
	/*   ---   Field   ---   */

	private int size;

	/*   ---   Constructor   ---   */

	public MosaicImageFilter(int size)
	{
		this.size=size;
	}

	/*   ---   フィルタリング   ---   */

	public void setDimensions(int width,int height)
	{
		super.setDimensions(width,height);
		consumer.setDimensions(width,height);
	}

	protected void filterImage()
	{
		int rgb,p[],s;
		int r,g,b,a;
	
		p=new int[size];
		for (int y=0;y<=originalSize.height-1;y+=size)
		{
			for (int x=0;x<=originalSize.width-1;x+=size)
			{
				a=r=g=b=0;
				s=0;
				for (int iy=0;iy<=size-1;iy++)
				{
					for (int ix=0;ix<=size-1;ix++)
					{
						if (0<=x+ix && x+ix<=originalSize.width -1 &&
						    0<=y+iy && y+iy<=originalSize.height-1)
						{
							rgb=original[(x+ix)+(y+iy)*originalSize.width];
							a+=(int)((rgb>>24) & 0xff);
							r+=(int)((rgb>>16) & 0xff);
							g+=(int)((rgb>> 8) & 0xff);
							b+=(int)((rgb>> 0) & 0xff);
							s++;
						}
					}
				}
				for (int ix=0;ix<=size-1;ix++)
				{
					p[ix]=((a/s)<<24) | ((r/s)<<16) | ((g/s)<<8) | ((b/s)<<0);
				}
				for (int iy=0;iy<=Math.min(size,originalSize.height-y)-1;iy++)
				{
					consumer.setPixels(x,y+iy,
					    Math.min(size,originalSize.width-x),1,
					    defaultRGB,p,0,size);
				}
			}
		}
	}

	public void setHints(int hint)
	{
		consumer.setHints(SINGLEPASS | (hint & SINGLEFRAME));
	}

	/*   ---   文字列化   ---   */

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