/* 
 * XImageBytes.java --
 *
 * Copyright 1997 Regents of the University of California
 * Permission to use, copy, modify, and distribute this
 * software and its documentation for any purpose and without
 * fee is hereby granted, provided that this copyright
 * notice appears in all copies.  The University of California
 * makes no representations about the suitability of this
 * software for any purpose.  It is provided "as is" without
 * express or implied warranty.
 *
 * rcsid = "$Header: /disks/barad-dur/now/rywang/src/java/classes/ryw/XVector.java,v 1.1 1995/11/09 12:19:39 rywang Exp $ xFS (Berkeley)"
 */

package ryw;

import java.lang.*;
import java.applet.*;
import java.net.*;
import java.io.*;
import java.awt.*;
import sun.net.www.protocol.memory.*;


/**
 * Converts a file name to an Image, and
 * converts a bunch of raw bytes to an Image.
 */
public class XImageBytes {
    Applet applet;
    int    count;
    String host;


    public XImageBytes () {}

    
    public XImageBytes (Applet applet, String host) {
	this.applet = applet;
	this.host   = host;
    }

    
    public Image bytes2image (byte bytes[], String format) {
	Image image;
	try {
	    image = (Image) MemoryURL.getImage
		(applet, "memory://"+host+"/foo"+count+"."+format, bytes);
	    count++;
	    MediaTracker tracker = new MediaTracker (applet);
	    tracker.addImage (image, 0);
	    tracker.waitForAll ();
	} catch (Exception e) {
	    image = null;
	    XError.yell ("bytes2image: MemoryURL.getContent failed");
	    e.printStackTrace ();
	}

	return image;
    }


    public byte[] name2bytes (String imageName) {
	
	File imageFile = new File (imageName);
	if (!imageFile.canRead ()) {
	    XError.yell ("name2bytes: can't read "+imageName);
	    return null;
	}
	long size = imageFile.length ();
	byte bytes[] = new byte [(int) size];

	try {
	    FileInputStream ins = new FileInputStream (imageFile);
	    if (ins.read (bytes) != size) {
		XError.yell ("name2bytes: read short file!");
		return null;
	    }
	    ins.close ();
	} catch (Exception e) {
	    XError.yell (e, "name2bytes: failed to read");
	    return null;
	}

	return bytes;
    }
}