Java Tutorial/2D Graphics/MemoryImageSource

Memory Image Generator

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.MemoryImageSource;
import javax.swing.JApplet;
public class MemoryImageGenerator extends JApplet {
  Image img;
  public void init() {
    Dimension d = getSize();
    int w = d.width;
    int h = d.height;
    int pixels[] = new int[w * h];
    int i = 0;
    for (int y = 0; y < h; y++) {
      for (int x = 0; x < w; x++) {
        int r = (x ^ y) & 0xff;
        int g = (x * 2 ^ y * 2) & 0xff;
        int b = (x * 4 ^ y * 4) & 0xff;
        pixels[i++] = (255 << 24) | (r << 16) | (g << 8) | b;
      }
    }
    img = createImage(new MemoryImageSource(w, h, pixels, 0, w));
  }
  public void paint(Graphics g) {
    g.drawImage(img, 0, 0, this);
  }
}