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diff --git a/src/classes/javax/media/opengl/GLDrawable.java b/src/classes/javax/media/opengl/GLDrawable.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;
+
+// FIXME: We need some way to tell when the device upon which the canvas is
+// being displayed has changed (e.g., the user drags the canvas's parent
+// window from one screen on multi-screen environment to another, when the
+// user changes the display bit depth or screen resolution, etc). When this
+// occurs, we need the canvas to reset the gl function pointer tables for the
+// canvas, because the new device may have different capabilities (e.g.,
+// doesn't support as many opengl extensions) from the original device. This
+// hook would also be useful in other GLDrawables (for example, offscreen
+// buffers such as pbuffers, whose contents may or may not be invalidated when
+// the display mode changes, depending on the vendor's GL implementation).
+//
+// Right now I'm not sure how hook into when this change occurs. There isn't
+// any AWT event corresponding to a device change (as far as I can
+// tell). We could constantly check the GraphicsConfiguration of the canvas's top-level
+// parent to see if it has changed, but this would be very slow (we'd have to
+// do it every time the context is made current). There has got to be a better
+// solution, but I'm not sure what it is.
+
+// FIXME: Subclasses need to call resetGLFunctionAvailability() on their
+// context whenever the displayChanged() function is called on our
+// GLEventListeners
+
+/** An abstraction for an OpenGL rendering target. A GLDrawable's
+    primary functionality is to create OpenGL contexts which can be
+    used to perform rendering. A GLDrawable does not automatically
+    create an OpenGL context, but all implementations of {@link
+    GLAutoDrawable} do so upon creation. */
+
+public interface GLDrawable {
+  /**
+   * Creates a new context for drawing to this drawable that will
+   * share display lists with the given GLContext.
+   *
+   * The GLContext <code>share</code> need not be associated with this
+   * GLDrawable.
+   */
+  public GLContext createContext(GLContext shareWith);
+
+  /**
+
+   * Indicates to on-screen GLDrawable implementations whether the
+   * underlying window has been created and can be drawn into. This
+   * method must be called from GLDrawables obtained from the
+   * GLDrawableFactory via the {@link GLDrawableFactory#getGLDrawable
+   * GLDrawableFactory.getGLDrawable()} method. It must typically be
+   * called with an argument of <code>true</code> in the
+   * <code>addNotify</code> method of components performing OpenGL
+   * rendering and with an argument of <code>false</code> in the
+   * <code>removeNotify</code> method. Calling this method has no
+   * other effects. For example, if <code>removeNotify</code> is
+   * called on a Canvas implementation for which a GLDrawable has been
+   * created, it is also necessary to destroy all OpenGL contexts
+   * associated with that GLDrawable. This is not done automatically
+   * by the implementation. It is not necessary to call
+   * <code>setRealized</code> on a GLCanvas, a GLJPanel, or a
+   * GLPbuffer, as these perform the appropriate calls on their
+   * underlying GLDrawables internally..
+   */
+  public void setRealized(boolean realized);
+
+  /** Requests a new width and height for this GLDrawable. Not all
+      drawables are able to respond to this request and may silently
+      ignore it. */
+  public void setSize(int width, int height);
+
+  /** Returns the current width of this GLDrawable. */
+  public int getWidth();
+
+  /** Returns the current height of this GLDrawable. */
+  public int getHeight();
+
+  /** Swaps the front and back buffers of this drawable. For {@link
+      GLAutoDrawable} implementations, when automatic buffer swapping
+      is enabled (as is the default), it is not necessary to call this
+      method and doing so may have undefined results. */
+  public void swapBuffers() throws GLException;
+}