// SelectColor.java -- prints out first 10 x 10 blue pixel values to standard output.  

// Erica Asai<easai@acm.org>
// Time-stamp: <2004-01-23 12:46:18 @easai>

// Comments: 

// Specify an image file name as command argument.  The first 10 x 10
// blue pixel values will be sent to standard output.

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

public class SelectColor extends Frame
{
    Image image;
    int memory[];
    String fileName="defaultImage.jpg";
    int imageWidth=0;
    int imageHeight=0;

    public void readImageFile(String fileName)
    {
	try
	    {
		image= getToolkit().getImage(fileName);	
		MediaTracker tracker=new MediaTracker(this);
		tracker.addImage(image,0);
		tracker.waitForID(0);
		if(tracker.isErrorAny())
		    {
			throw new Exception();
		    }
	    }
	catch(Exception e){e.printStackTrace();}
    }
    void captureImage()
    {
	imageWidth=image.getWidth(this);
	imageHeight=image.getHeight(this);

	memory=new int[imageWidth*imageHeight];
	PixelGrabber pg=
	    new PixelGrabber(image,
	                     0,
                             0,
			     imageWidth,
			     imageHeight,
			     memory,
			     0,
			     imageWidth);
	try
	    {
		pg.grabPixels();
	    }
	catch(Exception e){e.printStackTrace();}

	if(((pg.getStatus())&ABORT)!=0)
	    {
		System.err.println("Can not capture the image");
		return;
	    }
    }
    void init()
    {
	readImageFile(fileName);
	captureImage();	
	for(int i=0;i<10;i++)
	    {
		for(int j=0;j<10;j++)
		    System.out.print((memory[i*imageWidth+j]&0xff)+" ");
		System.out.println();
	    }
    }        
    public static void main(String args[])
    {
	SelectColor selectColor=new SelectColor();
	if(args.length>0)
	    selectColor.fileName=args[0];
	selectColor.init();
    }
}