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diff --git a/src/jogl/classes/javax/media/opengl/GLContext.java b/src/jogl/classes/javax/media/opengl/GLContext.java
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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 javax.media.opengl;
+
+import com.sun.opengl.impl.Debug;
+import java.util.HashMap;
+
+/** Abstraction for an OpenGL rendering context. In order to perform
+    OpenGL rendering, a context must be "made current" on the current
+    thread. OpenGL rendering semantics specify that only one context
+    may be current on the current thread at any given time, and also
+    that a given context may be current on only one thread at any
+    given time. Because components can be added to and removed from
+    the component hierarchy at any time, it is possible that the
+    underlying OpenGL context may need to be destroyed and recreated
+    multiple times over the lifetime of a given component. This
+    process is handled by the implementation, and the GLContext
+    abstraction provides a stable object which clients can use to
+    refer to a given context. */
+
+public abstract class GLContext {
+  protected static final boolean DEBUG = Debug.isPropertyDefined("jogl.debug.GLContext"); // Debug.debug("GLContext");
+
+  /** Indicates that the context was not made current during the last call to {@link #makeCurrent makeCurrent}. */
+  public static final int CONTEXT_NOT_CURRENT = 0;
+  /** Indicates that the context was made current during the last call to {@link #makeCurrent makeCurrent}. */
+  public static final int CONTEXT_CURRENT     = 1;
+  /** Indicates that a newly-created context was made current during the last call to {@link #makeCurrent makeCurrent}. */
+  public static final int CONTEXT_CURRENT_NEW = 2;
+
+  private static ThreadLocal currentContext = new ThreadLocal();
+
+  private HashMap/*<int, Object>*/ attachedObjects = new HashMap();
+
+  /**
+   * Returns the GLDrawable to which this context may be used to
+   * draw.
+   */
+  public abstract GLDrawable getGLDrawable();
+
+  /**
+   * Makes this GLContext current on the calling thread.
+   *
+   * There are two return values that indicate success and one that
+   * indicates failure. A return value of CONTEXT_CURRENT_NEW
+   * indicates that that context has been made current, and that
+   * this is the first time this context has been made current, or
+   * that the state of the underlying context or drawable may have
+   * changed since the last time this context was made current. In
+   * this case, the application may wish to initialize the state.  A
+   * return value of CONTEXT_CURRENT indicates that the context has
+   * been made currrent, with its previous state restored.
+   * 
+   * If the context could not be made current (for example, because
+   * the underlying drawable has not ben realized on the display) ,
+   * a value of CONTEXT_NOT_CURRENT is returned.
+   *
+   * If the context is in use by another thread at the time of the
+   * call, then if isSynchronized() is true the call will
+   * block. If isSynchronized() is false, an exception will be
+   * thrown and the context will remain current on the other thread.
+   *
+   * @return CONTEXT_CURRENT if the context was successfully made current
+   * @return CONTEXT_CURRENT_NEW if the context was successfully made
+   * current, but need to be initialized.
+   *
+   * @return CONTEXT_NOT_CURRENT if the context could not be made current.
+   *
+   * @throws GLException if synchronization is disabled and the
+   * context is current on another thread, or because the context
+   * could not be created or made current due to non-recoverable,
+   * window system-specific errors.
+   */
+  public abstract int makeCurrent() throws GLException;
+
+  /**
+   * Releases control of this GLContext from the current thread.
+   *
+   * @throws GLException if the context had not previously been made
+   * current on the current thread
+   */
+  public abstract void release() throws GLException;
+
+  /**
+   * Copies selected groups of OpenGL state variables from the
+   * supplied source context into this one. The <code>mask</code>
+   * parameter indicates which groups of state variables are to be
+   * copied. <code>mask</code> contains the bitwise OR of the same
+   * symbolic names that are passed to the GL command {@link
+   * GL#glPushAttrib glPushAttrib}. The single symbolic constant
+   * {@link GL#GL_ALL_ATTRIB_BITS GL_ALL_ATTRIB_BITS} can be used to
+   * copy the maximum possible portion of rendering state. <P>
+   *
+   * Not all values for GL state can be copied. For example, pixel
+   * pack and unpack state, render mode state, and select and feedback
+   * state are not copied. The state that can be copied is exactly the
+   * state that is manipulated by the GL command {@link
+   * GL#glPushAttrib glPushAttrib}. <P>
+   *
+   * On most platforms, this context may not be current to any thread,
+   * including the calling thread, when this method is called. Some
+   * platforms have additional requirements such as whether this
+   * context or the source context must occasionally be made current
+   * in order for the results of the copy to be seen; these
+   * requirements are beyond the scope of this specification.
+   *
+   * @param source the source OpenGL context from which to copy state
+   * @param mask a mask of symbolic names indicating which groups of state to copy
+
+   * @throws GLException if an OpenGL-related error occurred
+   */
+  public abstract void copy(GLContext source, int mask) throws GLException;
+
+  /**
+   * Returns the GL object bound to this thread current context.
+   * If no context is current, throw an GLException
+   *
+   * @return the current context's GL object on this thread
+   * @thows GLException if no context is current
+   */
+  public static GL getCurrentGL() throws GLException {
+    GLContext glc = getCurrent();
+    if(null==glc) {
+        throw new GLException("No OpenGL context current on this thread");
+    }
+    return glc.getGL();
+  }
+
+  /**
+   * Returns this thread current context.
+   * If no context is current, returns null.
+   *
+   * @return the context current on this thread, or null if no context
+   * is current.
+   */
+  public static GLContext getCurrent() {
+    return (GLContext) currentContext.get();
+  }
+
+  /**
+   * Sets the thread-local variable returned by {@link #getCurrent}
+   * and has no other side-effects. For use by third parties adding
+   * new GLContext implementations; not for use by end users.
+   */
+  protected static void setCurrent(GLContext cur) {
+    if(DEBUG) {
+        Exception e = new Exception("setCurrent: "+Thread.currentThread()+", "+currentContext.get()+" -> "+cur);
+        e.printStackTrace();
+    }
+
+    currentContext.set(cur);
+  }
+  
+  /**
+   * Destroys this OpenGL context and frees its associated
+   * resources. The context should have been released before this
+   * method is called.
+   */
+  public abstract void destroy();
+
+  /**
+   * Returns true if 'makeCurrent' will exhibit synchronized behavior.
+   */
+  public abstract boolean isSynchronized();
+    
+  /** 
+   * Determines whether 'makeCurrent' will exhibit synchronized behavior.
+   */
+  public abstract void setSynchronized(boolean isSynchronized);
+
+  /**
+   * Returns the GL pipeline object for this GLContext.
+   */
+  public abstract GL getGL();
+
+  /**
+   * Sets the GL pipeline object for this GLContext.
+   */
+  public abstract void setGL(GL gl);
+
+  /**
+   * Returns the attached user object for the given name to this GLContext.
+   */
+  public Object getAttachedObject(int name) {
+    return attachedObjects.get(new Integer(name));
+  }
+
+  /**
+   * Returns the attached user object for the given name to this GLContext.
+   */
+  public Object getAttachedObject(String name) {
+    return attachedObjects.get(name);
+  }
+
+  /**
+   * Sets the attached user object for the given name to this GLContext.
+   * Returns the previously set object or null.
+   */
+  public Object putAttachedObject(int name, Object obj) {
+    return attachedObjects.put(new Integer(name), obj);
+  }
+
+  /**
+   * Sets the attached user object for the given name to this GLContext.
+   * Returns the previously set object or null.
+   */
+  public Object putAttachedObject(String name, Object obj) {
+    return attachedObjects.put(name, obj);
+  }
+
+  /**
+   * Classname, GL, GLDrawable
+   */
+  public final String toString() {
+    return getClass().getName()+" ["+getGL()+
+           ",\n\tDrawable: "+ getGLDrawable()+"] ";
+  }
+
+  /** Returns a non-null (but possibly empty) string containing the
+      space-separated list of available platform-dependent (e.g., WGL,
+      GLX) extensions. Can only be called while this context is
+      current. */
+  public abstract String getPlatformExtensionsString();
+}