package infinitefiltertest;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.ColorModel;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.awt.image.ImageProducer;
import java.awt.image.MemoryImageSource;
import java.awt.image.RGBImageFilter;
import javax.swing.JComponent;
import javax.swing.JFrame;

public class InfiniteFilterTest {

    public static void main(String[] args) {
        final int w = 100;
        final int h = 100;

        int[] buf = new int[w * h];
        java.util.Arrays.fill(buf, 0xffff0000);

        MemoryImageSource s = new MemoryImageSource(w, h, ColorModel.getRGBdefault(), buf, 0, 0);

        final Image i = Toolkit.getDefaultToolkit().createImage(s);


        JFrame f = new JFrame("Filter");
        f.add(new JComponent() {
            Image image = i;
            int count = 0;
            public Dimension getPreferredSize() {
                return new Dimension(w, h);
            }

            public void paintComponent(Graphics g) {
                ImageFilter f = new RGBImageFilter() {

                    @Override
                    public int filterRGB(int x, int y, int rgb) {
                        switch (rgb) {
                            case 0xFFFF0000:
                                return 0xFF00FF00;
                            case 0xFF00FF00:
                                return 0xFF0000FF;
                            case 0xFF0000FF:
                                return 0xFFFF0000;
                            default:
                                return 0xFFFF0000;
                        }
                    }
                };

                count += 1;
                // note: we add next element to the consumers's chain
                ImageProducer p = new FilteredImageSource(image.getSource(), f);

                image  = Toolkit.getDefaultToolkit().createImage(p);

                g.drawImage(image, 0, 0, this);

                System.out.println("Count: " + count);
            }
        });

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.pack();
        f.setVisible(true);
    }

}