/*
* Copyright (c) 2009-2012 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT OWNER OR
* 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.jme3.system;
import com.jme3.input.JoyInput;
import com.jme3.input.KeyInput;
import com.jme3.input.MouseInput;
import com.jme3.input.TouchInput;
import com.jme3.input.dummy.DummyKeyInput;
import com.jme3.input.dummy.DummyMouseInput;
import com.jme3.renderer.Renderer;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.logging.Level;
import java.util.logging.Logger;
public class NullContext implements JmeContext, Runnable {
protected static final Logger logger = Logger.getLogger(NullContext.class.getName());
protected AtomicBoolean created = new AtomicBoolean(false);
protected AtomicBoolean needClose = new AtomicBoolean(false);
protected final Object createdLock = new Object();
protected int frameRate;
protected AppSettings settings = new AppSettings(true);
protected Timer timer;
protected SystemListener listener;
protected NullRenderer renderer;
public Type getType() {
return Type.Headless;
}
public void setSystemListener(SystemListener listener){
this.listener = listener;
}
protected void initInThread(){
logger.fine("NullContext created.");
logger.log(Level.FINE, "Running on thread: {0}", Thread.currentThread().getName());
Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
public void uncaughtException(Thread thread, Throwable thrown) {
listener.handleError("Uncaught exception thrown in "+thread.toString(), thrown);
}
});
timer = new NanoTimer();
renderer = new NullRenderer();
synchronized (createdLock){
created.set(true);
createdLock.notifyAll();
}
listener.initialize();
}
protected void deinitInThread(){
listener.destroy();
timer = null;
synchronized (createdLock){
created.set(false);
createdLock.notifyAll();
}
}
private static long timeThen;
private static long timeLate;
public void sync(int fps) {
long timeNow;
long gapTo;
long savedTimeLate;
gapTo = timer.getResolution() / fps + timeThen;
timeNow = timer.getTime();
savedTimeLate = timeLate;
try {
while (gapTo > timeNow + savedTimeLate) {
Thread.sleep(1);
timeNow = timer.getTime();
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
if (gapTo < timeNow) {
timeLate = timeNow - gapTo;
} else {
timeLate = 0;
}
timeThen = timeNow;
}
public void run(){
initInThread();
while (!needClose.get()){
listener.update();
if (frameRate > 0)
sync(frameRate);
}
deinitInThread();
logger.fine("NullContext destroyed.");
}
public void destroy(boolean waitFor){
needClose.set(true);
if (waitFor)
waitFor(false);
}
public void create(boolean waitFor){
if (created.get()){
logger.warning("create() called when NullContext is already created!");
return;
}
new Thread(this, "Headless Application Thread").start();
if (waitFor)
waitFor(true);
}
public void restart() {
}
public void setAutoFlushFrames(boolean enabled){
}
public MouseInput getMouseInput() {
return new DummyMouseInput();
}
public KeyInput getKeyInput() {
return new DummyKeyInput();
}
public JoyInput getJoyInput() {
return null;
}
public TouchInput getTouchInput() {
return null;
}
public void setTitle(String title) {
}
public void create(){
create(false);
}
public void destroy(){
destroy(false);
}
protected void waitFor(boolean createdVal){
synchronized (createdLock){
while (created.get() != createdVal){
try {
createdLock.wait();
} catch (InterruptedException ex) {
}
}
}
}
public boolean isCreated(){
return created.get();
}
public void setSettings(AppSettings settings) {
this.settings.copyFrom(settings);
frameRate = settings.getFrameRate();
if (frameRate <= 0)
frameRate = 60; // use default update rate.
}
public AppSettings getSettings(){
return settings;
}
public Renderer getRenderer() {
return renderer;
}
public Timer getTimer() {
return timer;
}
public boolean isRenderable() {
return true; // Doesn't really matter if true or false. Either way
// RenderManager won't render anything.
}
}