/**************************************************************************
* Copyright (c) 2001, 2002, 2003 by Punch Telematix. All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in the *
* documentation and/or other materials provided with the distribution. *
* 3. Neither the name of Punch Telematix nor the names of *
* other contributors may be used to endorse or promote products *
* derived from this software without specific prior written permission.*
* *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED *
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. *
* IN NO EVENT SHALL PUNCH TELEMATIX OR OTHER CONTRIBUTORS BE LIABLE *
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF *
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR *
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, *
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE *
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN *
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
**************************************************************************/
package com.acunia.wonka.rudolph;
import java.awt.image.*;
import java.util.*;
class GIFAnimator extends Thread {
private WeakHashMap producers;
private int tick = 0;
private static GIFAnimator ga = null;
public static GIFAnimator getInstance() {
if(ga == null) ga = new GIFAnimator();
return ga;
}
private GIFAnimator() {
super("GIF Animator");
producers = new WeakHashMap();
setPriority(7);
start();
}
public void registerGIF(GIFImageSource producer, ImageConsumer consumer) {
WeakHashMap consumers = (WeakHashMap)producers.get(producer);
if(consumers == null) {
consumers = new WeakHashMap();
producers.put(producer, consumers);
}
if(!consumers.containsKey(consumer)) {
consumers.put(consumer, null);
}
}
public void startAnimator() {
synchronized(this) {
this.notify();
}
}
private boolean checkProducers() {
boolean result = false;
Iterator p = producers.keySet().iterator();
GIFImageSource producer;
while(p.hasNext()) {
producer = (GIFImageSource)p.next();
if(producer != null) {
if(tick >= producer.next_event) {
WeakHashMap consumers = (WeakHashMap)producers.get(producer);
if(consumers != null) {
result |= producer.produceNextFrame(consumers, tick);
}
}
else {
result = true;
}
}
}
return result;
}
public void run() {
boolean keepOnGoing = false;
while(true) {
try {
synchronized(this) {
if(!keepOnGoing) {
wait();
}
}
sleep(50);
keepOnGoing = checkProducers();
if(!keepOnGoing) {
if(producers.size() == 0) {
ga = null;
return;
}
}
tick++;
}
catch(Exception e) {
e.printStackTrace();
}
}
}
}