// (c) 1998 Ekkehard Kraemer (ekraemer@pluto.camelot.de)

import java.awt.*;
import java.awt.image.*;
import java.util.*;
import java.io.*;
import java.net.*;

/**
 * Sorry, not documented yet.
 * <p>
 * <a href="Images.txt">Source</a>
 */
class Images
{
    static boolean init(Component comp,URL base,Label label) 
    {
	try 
	{ 
	    System.err.println("loadAll");
	    loadAll(base,comp);
	    System.err.println("splitUp");
	    splitUp(base,comp);
	    System.err.println("makeTransparent");
	    makeTransparent(comp,label);
	    System.err.println("setupAliases");
	    setupAliases();
	}
	catch (Exception e) 
	{ 
	    e.printStackTrace(System.err);
	    return false; 
	}
	return true;
    }

    static void loadAll(URL base,Component comp) throws Exception
    {
	URL u=new URL(base,"images/all.jpg");
	System.err.println(u);
	all=comp.getToolkit().getImage(u);
 	MediaTracker tracker=new MediaTracker(comp);;
	tracker.addImage(all,1);
	tracker.waitForAll(); 
	if (tracker.isErrorAny())
	    throw new Exception("loading all: tracker.isErrorAny()");
    }

    static void splitUp(URL base,Component comp) throws Exception
    {
	InputStream is=new URL(base,"images/all.desc").openStream();
	DataInputStream dis=new DataInputStream(is);
	Vector v=new Vector();
	try 
	{
	    while (true)
	    {
		String s=dis.readLine();
		if (s==null) break;	
// 		System.err.println(s);
		StringTokenizer st=new StringTokenizer(s);
		String tmp=st.nextToken();
		Point p=new Point(Integer.parseInt(st.nextToken()),
				  Integer.parseInt(st.nextToken()));
		v.addElement(p);
	    }
	} 
	catch (EOFException e) {}

	imgs=new Image[v.size()];
	int y=0,t=0;
	for (Enumeration e=v.elements(); e.hasMoreElements(); )
	{
	    Point p=(Point)(e.nextElement());

	    ImageFilter f=new CropImageFilter(0,y,p.x,p.y);
	    ImageProducer s=all.getSource();
	    ImageProducer ip=new FilteredImageSource(s,f);
	    Image i=comp.createImage(ip);
// 	    MediaTracker mt=new MediaTracker(comp);
// 	    mt.addImage(i,1);
// 	    mt.waitForAll();

// 	    if (mt.isErrorAny())
// 		throw new Exception("splitUp: tracker.isErrorAny(), "+p);
	    
	    y+=p.y;
	    imgs[t++]=i;
	}
    }

    static void makeTransparent(Component comp,Label label) throws Exception
    {
	for (int t=0; t<imgs.length; t++)
	{
	    label.setText(""+(t+1)+"/"+imgs.length);
	    System.err.println("trans "+t);
	    ImageFilter f=new TransparentFilter();
	    ImageProducer s=imgs[t].getSource();
	    ImageProducer p=new FilteredImageSource(s,f);
	    Image i=comp.createImage(p);
	    MediaTracker mt=new MediaTracker(comp);
	    mt.addImage(i,1);
	    mt.waitForAll();
	    if (mt.isErrorAny())
		throw new Exception("makeTransparent: tracker.isErrorAny()");
	    imgs[t]=i;
	}
    }

    static void setupAliases()
    {	
	int t,cnt=0;

	ball=imgs[cnt++];
	back=imgs[cnt++];
	bullet=imgs[cnt++];
	for (t=0; t<5; t++)
	    delay[t]=imgs[cnt++];
	wall=imgs[cnt++];
	triple=imgs[cnt++];
	for (t=0; t<3; t++)
	    paddle[t]=imgs[cnt++];	
	shrink=imgs[cnt++];
	grow=imgs[cnt++];
	newball=imgs[cnt++];
	bomb=imgs[cnt++];
	teleport=imgs[cnt++];
	for (t=0; t<7; t++)
	    block[t]=imgs[cnt++];
    }

    static Image all;
    static Image[] imgs;
    static Image ball,back,bullet,delay[]=new Image[5],wall,
	triple,paddle[]=new Image[3],shrink,grow,newball,bomb,teleport,
	block[]=new Image[7];
    static String errFile;
}

/**
 * Sorry, not documented yet.
 * <p>
 * <a href="Images.txt">Source</a>
 */
class TransparentFilter extends RGBImageFilter 
{
    public TransparentFilter()
    {
	canFilterIndexColorModel=true;
    }

    public int filterRGB(int x, int y, int rgb) 
    {
 	int r = (rgb >> 16) & 0xff;
 	int g = (rgb >> 8) & 0xff;
 	int b = (rgb >> 0) & 0xff;
	float[] hsv=Color.RGBtoHSB(r,g,b,null);
	if (hsv[2]<0.2) return 0;
	return rgb;
    }
}