// This program copies pixel data from a file to the screeen.
// It reads 256 by 256 bytes from file pic.data and makes each into a gray pixel.
// C code in mpd.c makes such a file as a test.
import java.awt.*;
import java.awt.image.*;
import java.io.*;
class Main {
    static BufferedImage I;
    static int rgb(FileInputStream is)throws IOException
      {int r=is.read(), g=is.read(), b=is.read(); return r<<16|g<<8|b;}
    static int shrt(FileInputStream is)throws IOException
      {int r=is.read(), g=is.read(); return r<<8|g;}
    static public void main( String[] args )
      throws FileNotFoundException, IOException
    {
        FileInputStream is = new FileInputStream("pic.data");
        final int X = shrt(is), Y = shrt(is); 
        I = new BufferedImage(X, Y, BufferedImage.TYPE_INT_RGB);
        Frame f = new Frame( "paint Example" );
        f.add("Center", new MainCanvas());
        f.setSize(new Dimension(X,Y+22));
        for (int i = 0; i<X; ++i) for(int j=0; j<Y; ++j)
           I.setRGB(i, j, (is.read())*0x010101);
        f.show();
    }
}
class MainCanvas extends Canvas
{
    public void paint(Graphics g)
    {
        g.drawImage(Main.I, 0, 0, Color.red, null);
    }
}