import java.awt.*;
import java.awt.image.*;

public class ColorSep extends java.applet.Applet { 
	Image img, redImg, greenImg, blueImg;
	public void init() {
		img = getImage( getClass().getResource( getParameter("img")) );
		redImg = createImage(new FilteredImageSource(img.getSource(), 
										new ColorMaskFilter( Color.red )));
		greenImg = createImage(new FilteredImageSource(img.getSource(), 
										new ColorMaskFilter( Color.green )));
		blueImg = createImage(new FilteredImageSource(img.getSource(), 
										new ColorMaskFilter( Color.blue )));
	}
	public void paint( Graphics g ) {
		int width = getSize().width, height = getSize().height;
		g.drawImage( redImg, 0, 0, width/3, height, this );
		g.drawImage( greenImg, width/3, 0, width/3, height, this );
		g.drawImage( blueImg, 2*width/3, 0, width/3, height, this );
	}
}

class ColorMaskFilter extends RGBImageFilter {
	Color color;

	ColorMaskFilter( Color mask ) {
		color = mask;
		canFilterIndexColorModel = true;
	}
	public int filterRGB(int x, int y, int pixel ) {
		return 
			255 << 24 |
			(((pixel & 0xff0000) >> 16) * color.getRed()/255) << 16 |
			(((pixel & 0xff00) >> 8) * color.getGreen()/255) << 8 |
			(pixel & 0xff) * color.getBlue()/255 ;
	}
}