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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.
*/
package com.sun.opengl.impl.awt;
import com.sun.nativewindow.impl.jawt.*;
import com.sun.opengl.impl.*;
import javax.media.opengl.*;
import java.lang.reflect.*;
import java.awt.GraphicsEnvironment;
public class AWTUtil {
// See whether we're running in headless mode
private static boolean headlessMode;
private static Class j2dClazz = null;
private static Method isOGLPipelineActive = null;
private static Method isQueueFlusherThread = null;
private static boolean j2dOk = false;
static {
lockedToolkit = false;
headlessMode = GraphicsEnvironment.isHeadless();
try {
j2dClazz = Class.forName("com.sun.opengl.impl.awt.Java2D");
isOGLPipelineActive = j2dClazz.getMethod("isOGLPipelineActive", null);
isQueueFlusherThread = j2dClazz.getMethod("isQueueFlusherThread", null);
j2dOk = true;
} catch (Exception e) {}
}
private static boolean lockedToolkit;
public static synchronized void lockToolkit() throws GLException {
if (lockedToolkit) {
throw new GLException("Toolkit already locked");
}
lockedToolkit = true;
if (headlessMode) {
// Workaround for running (to some degree) in headless
// environments but still supporting rendering via pbuffers
// For full correctness, would need to implement a Lock class
return;
}
if(j2dOk) {
try {
if( !((Boolean)isOGLPipelineActive.invoke(null, null)).booleanValue() ||
!((Boolean)isQueueFlusherThread.invoke(null, null)).booleanValue() ) {
JAWTUtil.lockToolkit();
}
} catch (Exception e) { j2dOk=false; }
}
if(!j2dOk) {
JAWTUtil.lockToolkit();
}
}
public static synchronized void unlockToolkit() {
if (lockedToolkit) {
lockedToolkit = false;
if (headlessMode) {
// Workaround for running (to some degree) in headless
// environments but still supporting rendering via pbuffers
// For full correctness, would need to implement a Lock class
return;
}
if(j2dOk) {
try {
if( !((Boolean)isOGLPipelineActive.invoke(null, null)).booleanValue() ||
!((Boolean)isQueueFlusherThread.invoke(null, null)).booleanValue() ) {
JAWTUtil.unlockToolkit();
}
} catch (Exception e) { j2dOk=false; }
}
if(!j2dOk) {
JAWTUtil.unlockToolkit();
}
}
}
public static boolean isToolkitLocked() {
return lockedToolkit;
}
}
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