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/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution 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 Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package com.sun.opengl.impl;
import java.util.*;
import javax.media.opengl.*;
/** Encapsulates the implementation of most of the GLAutoDrawable's
methods to be able to share it between GLCanvas and GLJPanel. */
public class GLDrawableHelper {
private volatile List listeners = new ArrayList();
private static final boolean DEBUG = Debug.debug("GLDrawableHelper");
private static final boolean VERBOSE = Debug.verbose();
private static final boolean NVIDIA_CRASH_WORKAROUND = Debug.isPropertyDefined("jogl.nvidia.crash.workaround");
private boolean autoSwapBufferMode = true;
public GLDrawableHelper() {
}
public synchronized void addGLEventListener(GLEventListener listener) {
List newListeners = (List) ((ArrayList) listeners).clone();
newListeners.add(listener);
listeners = newListeners;
}
public synchronized void removeGLEventListener(GLEventListener listener) {
List newListeners = (List) ((ArrayList) listeners).clone();
newListeners.remove(listener);
listeners = newListeners;
}
public void init(GLAutoDrawable drawable) {
for (Iterator iter = listeners.iterator(); iter.hasNext(); ) {
((GLEventListener) iter.next()).init(drawable);
}
}
public void display(GLAutoDrawable drawable) {
for (Iterator iter = listeners.iterator(); iter.hasNext(); ) {
((GLEventListener) iter.next()).display(drawable);
}
}
public void reshape(GLAutoDrawable drawable,
int x, int y, int width, int height) {
for (Iterator iter = listeners.iterator(); iter.hasNext(); ) {
((GLEventListener) iter.next()).reshape(drawable, x, y, width, height);
}
}
public void setAutoSwapBufferMode(boolean onOrOff) {
autoSwapBufferMode = onOrOff;
}
public boolean getAutoSwapBufferMode() {
return autoSwapBufferMode;
}
private static final ThreadLocal perThreadInitAction = new ThreadLocal();
/** Principal helper method which runs a Runnable with the context
made current. This could have been made part of GLContext, but a
desired goal is to be able to implement the GLCanvas in terms of
the GLContext's public APIs, and putting it into a separate
class helps ensure that we don't inadvertently use private
methods of the GLContext or its implementing classes. */
public void invokeGL(GLDrawable drawable,
GLContext context,
Runnable runnable,
Runnable initAction) {
// FIXME: downcast to GLContextImpl undesirable
boolean isOptimizable = ((context instanceof GLContextImpl) &&
((GLContextImpl) context).isOptimizable());
if (GLWorkerThread.isStarted() &&
GLWorkerThread.isWorkerThread() &&
isOptimizable) {
// We're going to allow a context to be left current on the
// GLWorkerThread for optimization purposes
GLContext lastContext = GLContext.getCurrent();
Runnable lastInitAction = (Runnable) perThreadInitAction.get();
if (lastContext != null && lastContext != context) {
lastContext.release();
} else {
lastContext = null;
}
// FIXME: probably need to handle the case where the user is
// waiting for this context to be released; need to periodically
// release the context? See if anybody is waiting to make it
// current on another thread? (The latter would require the use
// of internal APIs...)
int res = 0;
try {
res = context.makeCurrent();
if (res != GLContext.CONTEXT_NOT_CURRENT) {
perThreadInitAction.set(initAction);
if (res == GLContext.CONTEXT_CURRENT_NEW) {
if (DEBUG) {
System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running initAction");
}
initAction.run();
}
if (DEBUG && VERBOSE) {
System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running runnable");
}
runnable.run();
if (autoSwapBufferMode) {
if (drawable != null) {
drawable.swapBuffers();
}
}
}
} finally {
// FIXME: take this out as soon as possible
if (NVIDIA_CRASH_WORKAROUND) {
try {
if (res != GLContext.CONTEXT_NOT_CURRENT) {
context.release();
}
} catch (Exception e) {
}
}
if (lastContext != null) {
int res2 = lastContext.makeCurrent();
if (res2 == GLContext.CONTEXT_CURRENT_NEW) {
lastInitAction.run();
}
}
}
} else {
// Support for recursive makeCurrent() calls as well as calling
// other drawables' display() methods from within another one's
GLContext lastContext = GLContext.getCurrent();
Runnable lastInitAction = (Runnable) perThreadInitAction.get();
if (lastContext != null) {
lastContext.release();
}
int res = 0;
try {
res = context.makeCurrent();
if (res != GLContext.CONTEXT_NOT_CURRENT) {
perThreadInitAction.set(initAction);
if (res == GLContext.CONTEXT_CURRENT_NEW) {
if (DEBUG) {
System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running initAction");
}
initAction.run();
}
if (DEBUG && VERBOSE) {
System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running runnable");
}
runnable.run();
if (autoSwapBufferMode) {
if (drawable != null) {
drawable.swapBuffers();
}
}
}
} finally {
try {
if (res != GLContext.CONTEXT_NOT_CURRENT) {
context.release();
}
} catch (Exception e) {
}
if (lastContext != null) {
int res2 = lastContext.makeCurrent();
if (res2 == GLContext.CONTEXT_CURRENT_NEW) {
lastInitAction.run();
}
}
}
}
}
}
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