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diff --git a/src/demos/readbuffer/ReadBufferBase.java b/src/demos/readbuffer/ReadBufferBase.java
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+/*
+ * Copyright (c) 2008 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.
+ * 
+ */
+
+package demos.readbuffer;
+
+import java.nio.*;
+import javax.media.opengl.*;
+
+import com.sun.opengl.util.texture.Texture;
+import com.sun.opengl.util.texture.TextureData;
+import com.sun.opengl.util.BufferUtil;
+
+
+public class ReadBufferBase implements GLEventListener {
+    public boolean glDebug = false ;
+    public boolean glTrace = false ;
+
+    protected GLDrawable externalRead;
+
+    ReadBufferUtil readBufferUtil = new ReadBufferUtil();
+
+    public ReadBufferBase (GLDrawable externalRead) {
+        this.externalRead = externalRead ;
+    }
+
+    public void init(GLAutoDrawable drawable) {
+        GL _gl = drawable.getGL();
+
+        _gl.glGetError(); // flush error ..
+
+        if(glDebug) {
+            try {
+                _gl = _gl.getContext().setGL( GLPipelineFactory.create("javax.media.opengl.Debug", null, _gl, null) );
+            } catch (Exception e) {e.printStackTrace();} 
+        }
+
+        if(glTrace) {
+            try {
+                _gl = _gl.getContext().setGL( GLPipelineFactory.create("javax.media.opengl.Trace", null, _gl, new Object[] { System.err } ) );
+            } catch (Exception e) {e.printStackTrace();} 
+        }
+
+        System.out.println(_gl);
+
+        _gl.getContext().setGLDrawableRead(externalRead);
+        if(_gl.isGL2GL3()) {
+            _gl.getGL2GL3().glReadBuffer(GL2GL3.GL_FRONT);
+        }
+    }
+
+    public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
+    }
+
+    public void dispose(GLAutoDrawable drawable) {
+        readBufferUtil.dispose();
+    }
+
+    public void display(GLAutoDrawable drawable) {
+        GL gl = drawable.getGL();
+
+        readBufferUtil.fetchOffscreenTexture(drawable, gl);
+    }
+
+}
+