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diff --git a/src/net/java/joglutils/msg/nodes/ShaderNode.java b/src/net/java/joglutils/msg/nodes/ShaderNode.java
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+/*
+ * Copyright (c) 2007 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.
+ */
+
+package net.java.joglutils.msg.nodes;
+
+import java.awt.image.*;
+import java.io.*;
+import java.net.*;
+import java.util.*;
+
+import javax.media.opengl.*;
+
+import net.java.joglutils.msg.actions.*;
+import net.java.joglutils.msg.elements.*;
+import net.java.joglutils.msg.misc.*;
+
+/** Represents a vertex/fragment shader. */
+public class ShaderNode extends Node {
+
+  private String vertexShaderCode;
+  private String fragmentShaderCode;
+  private Shader shader;
+  private List<Shader> disposedShaders = new ArrayList<Shader>();
+
+  static {
+    // Enable the elements this node affects for known actions
+    GLShaderElement.enable(GLRenderAction.getDefaultState());
+  }
+
+  /** Initializes this shader from the given String. No OpenGL work is
+      done during this call; it is done lazily when the Shader is
+      fetched. */
+  public void setShader(String fragmentShaderCode) {
+      disposeShader();
+      this.vertexShaderCode = null;
+      this.fragmentShaderCode = fragmentShaderCode;
+  }
+
+  /** Initializes this shader from the given String. No OpenGL work is
+      done during this call; it is done lazily when the Shader is
+      fetched. */
+  public void setShader(String vertexShaderCode, String fragmentShaderCode) {
+      disposeShader();
+      this.vertexShaderCode = vertexShaderCode;
+      this.fragmentShaderCode = fragmentShaderCode;
+  }
+
+  /** Fetches the Shader object associated with this ShaderNode.
+      It is required to call this each frame during rendering.
+      An OpenGL context must be current at the time this method is
+      called or a GLException will be thrown. */
+  public Shader getShader() throws GLException {
+    lazyDispose();
+    if (shader == null) {
+        this.shader = new Shader(vertexShaderCode, fragmentShaderCode);
+    }
+    return shader;
+  }
+
+  public void doAction(Action action) {
+    if (ShaderElement.isEnabled(action.getState())) {
+      ShaderElement.set(action.getState(), this);
+    }
+  }
+
+  private synchronized void disposeShader() {
+    if (shader != null) {
+      disposedShaders.add(shader);
+      shader = null;
+    }
+  }
+
+  private void lazyDispose() {
+    while (!disposedShaders.isEmpty()) {
+      Shader s = null;
+      synchronized (this) {
+        s = disposedShaders.remove(disposedShaders.size() - 1);
+      }
+      s.dispose();
+    }
+  }
+}