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diff --git a/src/classes/com/sun/opengl/impl/glu/mipmap/ExtractSInt.java b/src/classes/com/sun/opengl/impl/glu/mipmap/ExtractSInt.java
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+++ b/src/classes/com/sun/opengl/impl/glu/mipmap/ExtractSInt.java
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+/*
+ * License Applicability. Except to the extent portions of this file are
+ * made subject to an alternative license as permitted in the SGI Free
+ * Software License B, Version 1.1 (the "License"), the contents of this
+ * file are subject only to the provisions of the License. You may not use
+ * this file except in compliance with the License. You may obtain a copy
+ * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+ * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+ * 
+ * http://oss.sgi.com/projects/FreeB
+ * 
+ * Note that, as provided in the License, the Software is distributed on an
+ * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+ * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+ * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+ * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+ * 
+ * NOTE:  The Original Code (as defined below) has been licensed to Sun
+ * Microsystems, Inc. ("Sun") under the SGI Free Software License B
+ * (Version 1.1), shown above ("SGI License").   Pursuant to Section
+ * 3.2(3) of the SGI License, Sun is distributing the Covered Code to
+ * you under an alternative license ("Alternative License").  This
+ * Alternative License includes all of the provisions of the SGI License
+ * except that Section 2.2 and 11 are omitted.  Any differences between
+ * the Alternative License and the SGI License are offered solely by Sun
+ * and not by SGI.
+ *
+ * Original Code. The Original Code is: OpenGL Sample Implementation,
+ * Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+ * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+ * Copyright in any portions created by third parties is as indicated
+ * elsewhere herein. All Rights Reserved.
+ * 
+ * Additional Notice Provisions: The application programming interfaces
+ * established by SGI in conjunction with the Original Code are The
+ * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+ * April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+ * 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+ * Window System(R) (Version 1.3), released October 19, 1998. This software
+ * was created using the OpenGL(R) version 1.2.1 Sample Implementation
+ * published by SGI, but has not been independently verified as being
+ * compliant with the OpenGL(R) version 1.2.1 Specification.
+ */
+
+package com.sun.opengl.impl.glu.mipmap;
+
+import java.nio.*;
+
+/**
+ *
+ * @author Administrator
+ */
+public class ExtractSInt implements ExtractPrimitive {
+  
+  /** Creates a new instance of ExtractSInt */
+  public ExtractSInt() {
+  }
+  
+  public double extract( boolean isSwap, ByteBuffer uint ) {
+    int i = 0;
+    if( isSwap ) {
+      i = Mipmap.GLU_SWAP_4_BYTES( uint.getInt() );
+    } else {
+      i = uint.getInt();
+    }
+    assert( i <= 0x7FFFFFFF );
+    return( i );
+  }
+  
+  public void shove( double value, int index, ByteBuffer data ) {
+    assert(0.0 <= value && value < Integer.MAX_VALUE);
+    IntBuffer ib = data.asIntBuffer();
+    ib.position( index );
+    ib.put( (int)value );
+  }
+}