// 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.
// See http://cap-lore.com/MathPhys/Hydro/Thud/java/
// about whether any FileInputStream is needed.
import java.awt.*;
import java.awt.image.*;
import java.io.*;
class Main {
    static int[] col = {0x00ffff, 0xff00ff, 0xffff00, 0xFFFFFF};
    static final int X = 700, Y = 700;
    static short gs(FileInputStream s) throws IOException, java.io.FileNotFoundException
      {byte x = (byte)s.read(), y = (byte)s.read(); 
           short z = (short)(((0xff&y)|(x<<8)));
           if (z<X) return z; return X-1;}
   
    static public void main( String[] args )
      throws FileNotFoundException, IOException
    { char[] abc = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
       'N', 'O', 'P'};
      FileInputStream is;
      for(int j=0; j<26; ++j) {
        BufferedImage I = new BufferedImage(X, Y, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = I.createGraphics();
        g.setColor(Color.white);
        try{is = new FileInputStream(args[0]+"trail"+abc[j]);}
        catch(java.io.FileNotFoundException nf){
    System.out.println("No file called \""+args[0]+"trail"+abc[j]+"\"");
        return;}
        Frame f = new Frame("aa"+abc[j]);
        f.add("Center", new MainCanvas(I));
        f.setSize(new Dimension(X,Y+22));
        try {for(int ww=0; ww<300000; ++ww) {
          byte pn = (byte)is.read(); short x = gs(is), y = gs(is);
      //    System.out.println(pn+","+x+","+y);
        if(y<Y) if(pn==3) g.fillOval(x-1, Y-2-y, 3, 3);
                else I.setRGB(x, Y-1-y, col[pn]);}}
        catch(Exception e){System.out.println("ex="+e);
       }f.setVisible(0<1);}
    }
}
class MainCanvas extends Canvas
{
    MainCanvas(BufferedImage J){super(); I=J;}
    BufferedImage I;
    
    public void paint(Graphics g)
    {
        g.drawImage(I, 0, 0, Color.red, null);
    }
}