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diff --git a/src/demos/readbuffer/Surface2File.java b/src/demos/readbuffer/Surface2File.java
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+++ b/src/demos/readbuffer/Surface2File.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.TextureData;
+import com.sun.opengl.util.BufferUtil;
+
+import com.sun.opengl.util.texture.spi.awt.IIOTextureWriter;
+import java.io.File;
+import java.io.IOException;
+
+import javax.media.nativewindow.*;
+
+public class Surface2File implements SurfaceUpdatedListener {
+
+    ReadBufferUtil readBufferUtil = new ReadBufferUtil();
+    IIOTextureWriter textureWriter = new IIOTextureWriter();
+    int shotNum=0;
+
+    public void dispose() {
+        readBufferUtil.dispose();
+    }
+
+    public void surfaceUpdated(Object updater, NativeWindow window, long when) {
+        if(updater instanceof GLDrawable) {
+            GLDrawable drawable = (GLDrawable) updater;
+            GLContext ctx = GLContext.getCurrent();
+            if(null!=ctx && ctx.getGLDrawable()==drawable) {
+                readBufferUtil.fetchOffscreenTexture(drawable, ctx.getGL());
+                surface2File("/tmp/shot/shot");
+            }
+        }
+    }
+
+    public void surface2File(String basename) {
+      if(!readBufferUtil.isValid()) return;
+
+      try {
+        textureWriter.write(new File(basename+"-"+shotNum+".jpg"), readBufferUtil.getTextureData());
+        shotNum++;
+      } catch (IOException ioe) { ioe.printStackTrace(); }
+      readBufferUtil.rewindPixelBuffer();
+    }
+}
+