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diff --git a/src/jogl/classes/com/jogamp/opengl/GLOffscreenAutoDrawable.java b/src/jogl/classes/com/jogamp/opengl/GLOffscreenAutoDrawable.java
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+/**
+ * Copyright 2012 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package com.jogamp.opengl;
+
+import com.jogamp.nativewindow.NativeWindowException;
+
+import com.jogamp.opengl.FBObject;
+
+/**
+ * Platform-independent {@link GLAutoDrawable} specialization,
+ * exposing offscreen functionality.
+ * <p>
+ * This class distinguishes itself from {@link GLAutoDrawable}
+ * with it's {@link #setSurfaceSize(int, int)} functionality.
+ * </p>
+ * <p>
+ * <a name="contextSharing"><h5>OpenGL Context Sharing</h5></a>
+ * To share a {@link GLContext} see the following note in the documentation overview:
+ * <a href="../../../overview-summary.html#SHARING">context sharing</a>
+ * as well as {@link GLSharedContextSetter}.
+ * </p>
+ */
+public interface GLOffscreenAutoDrawable extends GLAutoDrawable, GLSharedContextSetter {
+
+    /**
+     * Resize this {@link GLAutoDrawable}'s surface
+     * @param newWidth new width in pixel units
+     * @param newHeight new height in pixel units
+     * @throws NativeWindowException in case the surface could no be locked
+     * @throws GLException in case of an error during the resize operation
+     */
+    void setSurfaceSize(int newWidth, int newHeight) throws NativeWindowException, GLException;
+
+    /**
+     * Set the upstream UI toolkit object.
+     * @see #getUpstreamWidget()
+     */
+    void setUpstreamWidget(Object newUpstreamWidget);
+
+    /** {@link FBObject} based {@link GLOffscreenAutoDrawable} specialization */
+    public interface FBO extends GLOffscreenAutoDrawable, GLFBODrawable {
+    }
+}