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diff --git a/src/classes/com/sun/opengl/util/texture/TextureUtil.java b/src/classes/com/sun/opengl/util/texture/TextureUtil.java
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+/*
+ * Copyright (c) 2005 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 com.sun.opengl.util.texture;
+
+import javax.media.opengl.*;
+import javax.media.opengl.glu.*;
+
+public class TextureUtil {
+  /** Constant which can be used as a file suffix to indicate a
+      DirectDraw Surface file. */
+  public static final String DDS     = "dds";
+
+  /** Constant which can be used as a file suffix to indicate an SGI
+      RGB file. */
+  public static final String SGI     = "sgi";
+
+  /** Constant which can be used as a file suffix to indicate an SGI
+      RGB file. */
+  public static final String SGI_RGB = "rgb";
+
+  /** Constant which can be used as a file suffix to indicate a GIF
+      file. */
+  public static final String GIF     = "gif";
+
+  /** Constant which can be used as a file suffix to indicate a JPEG
+      file. */
+  public static final String JPG     = "jpg";
+
+  /** Constant which can be used as a file suffix to indicate a PNG
+      file. */
+  public static final String PNG     = "png";
+
+  /** Constant which can be used as a file suffix to indicate a Targa
+      file. */
+  public static final String TGA     = "tga";
+
+  /** Constant which can be used as a file suffix to indicate a TIFF
+      file. */
+  public static final String TIFF    = "tiff";
+
+  // For manually disabling the use of the texture rectangle
+  // extensions so you know the texture target is GL_TEXTURE_2D; this
+  // is useful for shader writers (thanks to Chris Campbell for this
+  // observation)
+  private static boolean texRectEnabled = true;
+
+  //---------------------------------------------------------------------------
+  // Global disabling of texture rectangle extension
+  //
+
+  /** Toggles the use of the GL_ARB_texture_rectangle extension by the
+      TextureIO classes. By default, on hardware supporting this
+      extension, the TextureIO classes may use the
+      GL_ARB_texture_rectangle extension for non-power-of-two
+      textures. (If the hardware supports the
+      GL_ARB_texture_non_power_of_two extension, that one is
+      preferred.) In some situations, for example when writing
+      shaders, it is advantageous to force the texture target to
+      always be GL_TEXTURE_2D in order to have one version of the
+      shader, even at the expense of texture memory in the case where
+      NPOT textures are not supported. This method allows the use of
+      the GL_ARB_texture_rectangle extension to be turned off globally
+      for this purpose. The default is that the use of the extension
+      is enabled. */
+  public static void setTexRectEnabled(boolean enabled) {
+    texRectEnabled = enabled;
+  }
+
+  /** Indicates whether the GL_ARB_texture_rectangle extension is
+      allowed to be used for non-power-of-two textures; see {@link
+      #setTexRectEnabled setTexRectEnabled}. */
+  public static boolean isTexRectEnabled() {
+    return texRectEnabled;
+  }
+
+}