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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.windows;
import java.nio.*;
import java.util.*;
import javax.media.opengl.*;
import com.sun.opengl.impl.*;
public class WindowsExternalGLContext extends WindowsGLContext {
private boolean firstMakeCurrent = true;
private boolean created = true;
private GLContext lastContext;
public WindowsExternalGLContext() {
super(null, null, true);
hglrc = WGL.wglGetCurrentContext();
if (hglrc == 0) {
throw new GLException("Error: attempted to make an external GLContext without a drawable/context current");
}
if (DEBUG) {
System.err.println(getThreadName() + ": !!! Created external OpenGL context " + toHexString(hglrc) + " for " + this);
}
GLContextShareSet.contextCreated(this);
resetGLFunctionAvailability();
}
public int makeCurrent() throws GLException {
// Save last context if necessary to allow external GLContexts to
// talk to other GLContexts created by this library
GLContext cur = getCurrent();
if (cur != null && cur != this) {
lastContext = cur;
setCurrent(null);
}
return super.makeCurrent();
}
public void release() throws GLException {
super.release();
setCurrent(lastContext);
lastContext = null;
}
protected int makeCurrentImpl() throws GLException {
if (firstMakeCurrent) {
firstMakeCurrent = false;
return CONTEXT_CURRENT_NEW;
}
return CONTEXT_CURRENT;
}
protected void releaseImpl() throws GLException {
}
protected void destroyImpl() throws GLException {
created = false;
GLContextShareSet.contextDestroyed(this);
}
public boolean isCreated() {
return created;
}
}
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