/*   1 パス ImageFilter  Ver 0.10   */
/*                                  */
/*                                  */
/*   by Atsushi            98/4/9   */


package net.antun.lib.awt.image;

import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.image.ColorModel;
import java.awt.image.ImageFilter;
import java.util.Hashtable;


public abstract class SinglepassImageFilter extends ImageFilter
{
	/*   ---   Field   ---   */

	protected int original[];
	protected Dimension originalSize;

	protected static ColorModel defaultRGB=ColorModel.getRGBdefault();

	/*   ---   Constructor   ---   */

	public SinglepassImageFilter()
	{
	}

	/*   ---   フィルタリング   ---   */

	public void setDimensions(int width,int height)
	{
		original    =new int[width*height];
		originalSize=new Dimension(width,height);
	}

	public void setPixels(int x,int y,int width,int height,ColorModel model,
	                      byte pixels[],int offset,int scansize)
	{
		for (int iy=0;iy<=height-1;iy++)
		{
			for (int ix=0;ix<=width-1;ix++)
			{
				original[x+ix+(y+iy)*originalSize.width]=model.getRGB(
				    pixels[offset+ix+iy*scansize] & 0xff);
			}
		}
	}

	public void setPixels(int x,int y,int width,int height,ColorModel model,
	                      int pixels[],int offset,int scansize)
	{
		if (model==defaultRGB)
		{
			for (int iy=0;iy<=height-1;iy++)
			{
				System.arraycopy(pixels,offset+iy*scansize,
				                 original,x+(y+iy)*originalSize.width,width);
			}
		}
		else
		{
			for (int iy=0;iy<=height-1;iy++)
			{
				for (int ix=0;ix<=width-1;ix++)
				{
					original[x+ix+(y+iy)*originalSize.width]=model.getRGB(
					    pixels[offset+ix+iy*scansize]);
				}
			}
		}
	}

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

	public void setColorModel(ColorModel model)
	{
		consumer.setColorModel(defaultRGB);
	}

	public void imageComplete(int status)
	{
		if (status==IMAGEERROR || status==IMAGEABORTED)
		{
			consumer.imageComplete(status);
			return;
		}
		filterImage();
		consumer.imageComplete(status);
	}

	protected abstract void filterImage();
}