Merged JSR-231 branch on to the main JOGL trunk. The main trunk now

contains the evolving JSR-231 Reference Implementation and the JSR-231
branch is permanently closed.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@401 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 0 insertions, 1523 deletions

diff --git a/src/net/java/games/jogl/impl/mipmap/HalveImage.java b/src/net/java/games/jogl/impl/mipmap/HalveImage.java
deleted file mode 100644
index ea12577b9..000000000
--- a/src/net/java/games/jogl/impl/mipmap/HalveImage.java
+++ /dev/null
@@ -1,1523 +0,0 @@
-/*
- * 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.
- * 
- * 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 net.java.games.jogl.impl.mipmap;
-
-import net.java.games.jogl.GL;
-import java.nio.*;
-
-/**
- *
- * @author  Administrator
- */
-public class HalveImage {
-  
-  private static final int BOX2 = 2;
-  private static final int BOX4 = 4;
-  private static final int BOX8 = 8;
-  
-  public static void halveImage( int components, int width, int height,
-          ShortBuffer datain, ShortBuffer dataout ) {
-    int i, j, k;
-    int newwidth, newheight;
-    int delta;
-    int t = 0;
-    short temp = 0;
-    
-    newwidth = width / 2;
-    newheight = height /2;
-    delta = width * components;
-    
-    // Piece of cake
-    for( i = 0; i < newheight; i++ ) {
-      for( j = 0; j < newwidth; j++ ) {
-        for( k = 0; k < components; k++ ) {
-          datain.position( t );
-          temp = datain.get();
-          datain.position( t + components );
-          temp += datain.get();
-          datain.position( t + delta );
-          temp += datain.get();
-          datain.position( t + delta + components );
-          temp +=datain.get();
-          temp += 2;
-          temp /= 4;
-          dataout.put( temp );
-          t++;
-        }
-        t += components;
-      }
-      t += delta;
-    }
-  }
-  
-  public static void halveImage_ubyte( int components, int width, int height,
-                                      ByteBuffer datain, ByteBuffer dataout,
-                                      int element_size, int ysize, int group_size ) {
-    int i, j, k;
-    int newwidth, newheight;
-    int s;
-    int t;
-    
-    // Handle case where there is only 1 column/row
-    if( width == 1 || height == 1 ) {
-      assert( !( width == 1 && height == 1 ) ); // can't be 1x1
-      halve1Dimage_ubyte( components, width, height, datain, dataout, element_size, ysize, group_size );
-      return;
-    }
-    
-    newwidth = width / 2;
-    newheight = height / 2;
-    s = 0;
-    t = 0;
-    
-    int temp = 0;
-    // piece of cake
-    for( i = 0; i < newheight; i++ ) {
-      for( j = 0; j < newwidth; j++ ) {
-        for( k = 0; k < components; k++ ) {
-          datain.position( t );
-          temp = ( 0x000000FF & datain.get() );
-          datain.position( t + group_size );
-          temp += ( 0x000000FF & datain.get() );
-          datain.position( t + ysize );
-          temp += ( 0x000000FF & datain.get() );
-          datain.position( t + ysize + group_size );
-          temp += ( 0x000000FF & datain.get() ) + 2;
-          dataout.put( (byte)(temp / 4) );
-          t += element_size;
-        }
-        t += group_size;
-      }
-      t += ysize;
-    }
-  }
-  
-  public static void halve1Dimage_ubyte( int components, int width, int height,
-                      ByteBuffer datain, ByteBuffer dataout, 
-                      int element_size, int ysize, int group_size ) {
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int src = 0;
-    int dest = 0;
-    int jj;
-    int temp = 0;
-    
-    assert( width == 1 || height == 1 ); // Must be 1D
-    assert( width != height ); // can't be square
-    
-    if( height == 1 ) { // 1 row
-      assert( width != 1 ); // widthxheight can't be 1x1
-      halfHeight = 1;
-      
-      for( jj = 0; jj < halfWidth; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          datain.position( src );
-          temp = ( 0x000000FF & datain.get() );
-          datain.position( src + group_size );
-          temp += ( 0x000000FF & datain.get() );
-          temp /= 2;
-          dataout.put( (byte)temp );
-          /*
-          dataout.setByte( (byte)(((0x000000FF & datain.setIndexInBytes(src).getByte()) + 
-                    (0x000000FF & datain.setIndexInBytes( src + group_size ).getByte())) / 2 ) );
-           */
-          src += element_size;
-          //dataout.plusPlus();
-          dest++;
-        }
-        src += group_size; // skip to next 2
-      }
-      int padBytes = ysize - ( width * group_size );
-      src += padBytes; // for assertion only
-    } else if( width == 1 ) { // 1 column
-      int padBytes = ysize - ( width * group_size );
-      assert( height != 1 );
-      halfWidth = 1;
-      // one vertical column with possible pad bytes per row
-      // average two at a time
-      for( jj = 0; jj < halfHeight; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          datain.position( src );
-          temp = ( 0x000000FF & datain.get() );
-          datain.position( src + ysize );
-          temp += ( 0x000000FF & datain.get() );
-          temp /= 2;
-          dataout.put( (byte)temp );
-          /*
-          dataout.setByte( (byte)(((0x000000FF & datain.setIndexInBytes(src).getByte()) + 
-                    (0x000000FF & datain.setIndexInBytes(src + ysize).getByte()) ) / 2 ) );
-           */
-          src += element_size;
-          //dataout.plusPlus();
-          dest++;
-        }
-        src += padBytes; // add pad bytes, if any, to get to end of row
-        src += ysize;
-      }
-    }
-    assert( src == ysize * height );
-    assert( dest == components * element_size * halfWidth * halfHeight );
-  }
-  
-  public static void halveImage_byte( int components, int width, int height,
-                    ByteBuffer datain, ByteBuffer dataout, int element_size,
-                    int ysize, int group_size ) {
-    int i, j, k;
-    int newwidth, newheight;
-    int s = 0;
-    int t = 0;
-    byte temp = (byte)0;
-    
-    // handle case where there is only 1 column
-    if( width == 1 || height == 1 ) {
-      assert( !( width == 1 && height == 1 ) );
-      halve1Dimage_byte( components, width, height, datain, dataout, element_size,
-                                                            ysize, group_size );
-      return;
-    }
-    
-    newwidth = width / 2;
-    newheight = height / 2;
-    
-    for( i = 0; i < newheight; i++ ) {
-      for( j = 0; j < newwidth; j++ ) {
-        for( k = 0; k < components; k++ ) {
-          datain.position( t );
-          temp = datain.get();
-          datain.position( t + group_size );
-          temp += datain.get();
-          datain.position( t + ysize );
-          temp += datain.get();
-          datain.position( t + ysize + group_size );
-          temp += datain.get();
-          temp += 2;
-          temp /= 4;
-          dataout.put( temp );
-          t += element_size;
-        }
-        t += group_size;
-      }
-      t += ysize;
-    }
-  }
-  
-  public static void halve1Dimage_byte( int components, int width, int height,
-                      ByteBuffer datain, ByteBuffer dataout,
-                      int element_size, int ysize, int group_size ) {
-    int halfWidth = width / 2;
-    int halfHeight = width / 2;
-    int src = 0;
-    int dest = 0;
-    int jj;
-    byte temp = (byte)0;
-    
-    assert( width == 1 || height == 1 ); // must be 1D
-    assert( width != height ); // can't be square
-    
-    if( height == 1 ) { // 1 row
-      assert( width != 1 ); // widthxheight can't be 1
-      halfHeight = 1;
-      
-      for( jj = 0; jj < halfWidth; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          datain.position( src );
-          temp = datain.get();
-          datain.position( src + group_size );
-          temp += datain.get();
-          temp /= 2;
-          dataout.put( temp );
-          src += element_size;
-          dest++;
-        }
-        src += group_size; // skip to next 2
-      }
-      int padBytes = ysize - ( width * group_size );
-      src += padBytes; // for assert only
-    } else if( width == 1 ) { // 1 column
-      int padBytes = ysize - ( width * group_size );
-      assert( height != 1 ); // widthxheight can't be 1
-      halfWidth = 1;
-      // one vertical column with possible pad bytes per row
-      // average two at a time
-      
-      for( jj = 0; jj < halfHeight; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          datain.position( src );
-          temp = datain.get();
-          datain.position( src + ysize );
-          temp += datain.get();
-          temp /= 2;
-          src += element_size;
-          dest++;
-        }
-        src += padBytes; // add pad bytes, if any, to get to end of row
-        src += ysize;
-      }
-      assert( src == ysize * height );
-    }
-    assert( dest == components * element_size * halfWidth * halfHeight );
-  }
-  
-  public static void halveImage_ushort( int components, int width, int height,
-                          ByteBuffer datain, ShortBuffer dataout, int element_size,
-                          int ysize, int group_size, boolean myswap_bytes ) {
-    int i, j, k, l;
-    int newwidth, newheight;
-    int s = 0;
-    int t = 0;
-    int temp = 0;
-    // handle case where there is only 1 column/row
-    if( width == 1 || height == 1 ) {
-      assert( !( width == 1 && height == 1 ) ); // can't be 1x1
-      halve1Dimage_ushort( components, width, height, datain, dataout, element_size,
-                                ysize, group_size, myswap_bytes );
-      return;
-    }
-    
-    newwidth = width / 2;
-    newheight = height / 2;
-    
-    // Piece of cake
-    if( !myswap_bytes ) {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            datain.position( t );
-            temp = ( 0x0000FFFF & datain.getShort() );
-            datain.position( t + group_size );
-            temp += ( 0x0000FFFF & datain.getShort() );
-            datain.position( t + ysize );
-            temp += ( 0x0000FFFF & datain.getShort() );
-            datain.position( t + ysize + group_size );
-            temp += ( 0x0000FFFF & datain.getShort() );
-            dataout.put( (short)( ( temp + 2 ) / 4 ) );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    } else {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            datain.position( t );
-            temp = ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ) );
-            datain.position( t + group_size );
-            temp += ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ) );
-            datain.position( t + ysize );
-            temp += ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ) );
-            datain.position( t + ysize + group_size );
-            temp += ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ) );
-            dataout.put( (short)( ( temp + 2 ) / 4 ) );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    }
-  }
-  
-  public static void halve1Dimage_ushort( int components, int width, int height,
-                      ByteBuffer datain, ShortBuffer dataout, int element_size,
-                      int ysize, int group_size, boolean myswap_bytes ) {
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int src = 0;
-    int dest = 0;
-    int jj;
-    
-    assert( width == 1 || height == 1 ); // must be 1D
-    assert( width != height ); // can't be square
-    
-    if( height == 1 ) { // 1 row
-      assert( width != 1 ); // widthxheight can't be 1
-      halfHeight = 1;
-      
-      for( jj = 0; jj < halfWidth; jj++ ) {
-        int kk;
-        for( kk = 0; kk < halfHeight; kk++ ) {
-          int[] ushort = new int[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            ushort[0] = ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ) );
-            datain.position( src + group_size );
-            ushort[1] = (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ) );
-          } else {
-            datain.position( src );
-            ushort[0] = (0x0000FFFF & datain.getShort() );
-            datain.position( src + group_size );
-            ushort[1] = (0x0000FFFF & datain.getShort() );
-          }
-          dataout.put( (short)( (ushort[0] + ushort[1]) / 2 ) );
-          src += element_size;
-          dest += 2;
-        }
-        src += group_size; // skip to next 2
-      }
-      int padBytes = ysize - ( width * group_size );
-      src += padBytes; // for assertion only
-    } else if( width == 1 ) { // 1 column
-      int padBytes = ysize - ( width * group_size );
-      assert( height != 1 ); // widthxheight can't be 1
-      halfWidth = 1;
-      // one vertical column with possible pad bytes per row
-      // average two at a time
-      
-      for( jj = 0; jj < halfHeight; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          int[] ushort = new int[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            ushort[0] = ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ) );
-            datain.position( src + ysize );
-            ushort[0] = ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ) );
-          } else {
-            datain.position( src );
-            ushort[0] = ( 0x0000FFFF & datain.getShort() );
-            datain.position( src + ysize );
-            ushort[1] = ( 0x0000FFFF & datain.getShort() );
-          }
-          dataout.put( (short)((ushort[0] + ushort[1]) / 2) );
-          src += element_size;
-          dest += 2;
-        }
-        src += padBytes; // add pad bytes, if any, to get to end of row
-        src += ysize;
-      }
-      assert( src == ysize * height );
-    }
-    assert( dest == components * element_size * halfWidth * halfHeight );
-  }
-  
-  public static void halveImage_short( int components, int width, int height,
-                        ByteBuffer datain, ShortBuffer dataout, int element_size,
-                        int ysize, int group_size, boolean myswap_bytes ) {
-    int i, j, k, l;
-    int newwidth, newheight;
-    int s = 0;
-    int t = 0;
-    short temp = (short)0;
-    // handle case where there is only 1 column/row
-    if( width == 1 || height == 1 ) {
-      assert( !( width == 1 && height == 1 ) ); // can't be 1x1
-      halve1Dimage_short( components, width, height, datain, dataout, element_size,
-                            ysize, group_size, myswap_bytes );
-      return;
-    }
-    
-    newwidth = width / 2;
-    newheight = height / 2;
-    
-    // Piece of cake
-    if( !myswap_bytes ) {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            datain.position( t );
-            temp = datain.getShort();
-            datain.position( t + group_size );
-            temp += datain.getShort();
-            datain.position( t + ysize );
-            temp += datain.getShort();
-            datain.position( t + ysize + group_size );
-            temp += datain.getShort();
-            temp += 2;
-            temp /= 4;
-            dataout.put( (short)temp );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    } else {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            short b;
-            int buf;
-            datain.position( t );
-            temp = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() );
-            datain.position( t + group_size );
-            temp += Mipmap.GLU_SWAP_2_BYTES( datain.getShort() );
-            datain.position( t + ysize );
-            temp += Mipmap.GLU_SWAP_2_BYTES( datain.getShort() );
-            datain.position( t + ysize + group_size );
-            temp += Mipmap.GLU_SWAP_2_BYTES( datain.getShort() );
-            temp += 2;
-            temp /= 4;
-            dataout.put( temp );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    }
-  }
-  
-  public static void halve1Dimage_short( int components, int width, int height,
-              ByteBuffer datain, ShortBuffer dataout, int element_size, int ysize,
-              int group_size, boolean myswap_bytes ) {
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int src = 0;
-    int dest = 0;
-    int jj;
-    
-    assert( width == 1 || height == 1 ); // must be 1D
-    assert( width != height ); // can't be square
-    
-    if( height == 1 ) { // 1 row
-      assert( width != 1 ); // can't be 1x1
-      halfHeight = 1;
-      
-      for( jj = 0; jj < halfWidth; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          short[] sshort = new short[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            sshort[0] = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() );
-            datain.position( src + group_size );
-            sshort[1] = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() );
-          } else {
-            datain.position( src );
-            sshort[0] = datain.getShort();
-            datain.position( src + group_size );
-            sshort[1] = datain.getShort();
-          }
-          dataout.put( (short)(( sshort[0] + sshort[1] ) / 2) );
-          src += element_size;
-          dest += 2;
-        }
-        src += group_size; // skip to next 2
-      }
-      int padBytes = ysize - ( width * group_size );
-      src += padBytes; // for assertion only
-    } else if( width == 1 ) {
-      int padBytes = ysize - ( width * group_size );
-      assert( height != 1 );
-      halfWidth = 1;
-      // one vertical column with possible pad bytes per row
-      // average two at a time
-      
-      for( jj = 0; jj < halfHeight; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          short[] sshort = new short[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            sshort[0] = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() );
-            datain.position( src + ysize );
-            sshort[1] = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() );
-          } else {
-            datain.position( src );
-            sshort[0] = datain.getShort();
-            datain.position( src + ysize );
-            sshort[1] = datain.getShort();
-          }
-          dataout.put( (short)(( sshort[0] + sshort[1] ) / 2) );
-          src += element_size;
-          dest += 2;
-        }
-        src += padBytes; // add pad bytes, if any, to get to end of row
-        src += ysize;
-      }
-      assert( src == ysize * height );
-    }
-    assert( dest == ( components * element_size * halfWidth * halfHeight ) );
-  }
-  
-  public static void halveImage_uint( int components, int width, int height,
-                          ByteBuffer datain, IntBuffer dataout, int element_size,
-                          int ysize, int group_size, boolean myswap_bytes ) {
-    int i, j, k, l;
-    int newwidth, newheight;
-    int s = 0;
-    int t = 0;
-    double temp = 0;
-    
-    // handle case where there is only 1 column/row
-    if( width == 1 || height == 1 ) {
-      assert( !( width == 1 && height == 1 ) ); // can't be 1x1
-      halve1Dimage_uint( components, width, height, datain, dataout, element_size,
-                                ysize, group_size, myswap_bytes );
-      return;
-    }
-    
-    newwidth = width / 2;
-    newheight = height / 2;
-    
-    // Piece of cake
-    if( !myswap_bytes ) {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            datain.position( t );
-            temp = (0x000000007FFFFFFFL & datain.getInt() );
-            datain.position( t + group_size );
-            temp += (0x000000007FFFFFFFL & datain.getInt() );
-            datain.position( t + ysize );
-            temp += (0x000000007FFFFFFFL & datain.getInt() );
-            datain.position( t + ysize + group_size );
-            temp += (0x000000007FFFFFFFL & datain.getInt() );
-            dataout.put( (int)( ( temp / 4 ) + 0.5 ) );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    } else {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            // need to cast to double to hold large unsigned ints
-            double buf;
-            datain.position( t );
-            buf = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            datain.position( t + group_size );
-            buf += ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            datain.position( t + ysize );
-            buf += ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            datain.position( t + ysize + group_size );
-            buf += ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            temp /= 4;
-            temp += 0.5;
-            dataout.put( (int)temp );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    }
-  }
-  
-  public static void halve1Dimage_uint( int components, int width, int height,
-                      ByteBuffer datain, IntBuffer dataout, int element_size, int ysize,
-                      int group_size, boolean myswap_bytes ) {
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int src = 0;
-    int dest = 0;
-    int jj;
-    
-    assert( width == 1 || height == 1 ); // must be 1D
-    assert( width != height ); // can't be square
-    
-    if( height == 1 ) { // 1 row
-      assert( width != 1 ); // widthxheight can't be 1
-      halfHeight = 1;
-      
-      for( jj = 0; jj < halfWidth; jj++ ) {
-        int kk;
-        for( kk = 0; kk < halfHeight; kk++ ) {
-          long[] uint = new long[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            uint[0] = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            datain.position( src + group_size );
-            uint[1] = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-          } else {
-            datain.position( src );
-            uint[0] = ( 0x00000000FFFFFFFF & datain.getInt() );
-            datain.position( src + group_size );
-            uint[1] = (0x00000000FFFFFFFF & datain.getInt() );
-          }
-          dataout.put( (int)( ( uint[0] + uint[1] ) / 2.0 ) );
-          src += element_size;
-          dest += 4;
-        }
-        src += group_size; // skip to next 2
-      }
-      int padBytes = ysize - ( width * group_size );
-      src += padBytes; // for assertion only
-    } else if( width == 1 ) { // 1 column
-      int padBytes = ysize - ( width * group_size );
-      assert( height != 1 ); // widthxheight can't be 1
-      halfWidth = 1;
-      // one vertical column with possible pad bytes per row
-      // average two at a time
-      
-      for( jj = 0; jj < halfHeight; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          long[] uint = new long[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            uint[0] = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            datain.position( src + group_size );
-            uint[0] = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-          } else {
-            datain.position( src );
-            uint[0] = ( 0x00000000FFFFFFFF & datain.getInt() );
-            datain.position( src + ysize );
-            uint[1] = ( 0x00000000FFFFFFFF & datain.getInt() );
-          }
-          dataout.put( (int)( ( uint[0] + uint[1] ) / 2.0 ) );
-          src += element_size;
-          dest += 4;
-        }
-        src += padBytes; // add pad bytes, if any, to get to end of row
-        src += ysize;
-      }
-      assert( src == ysize * height );
-    }
-    assert( dest == components * element_size * halfWidth * halfHeight );
-  }
-  
-  public static void halveImage_int( int components, int width, int height,
-                        ByteBuffer datain, IntBuffer dataout, int element_size,
-                        int ysize, int group_size, boolean myswap_bytes ) {
-    int i, j, k, l;
-    int newwidth, newheight;
-    int s = 0;
-    int t = 0;
-    int temp = 0;
-    
-    // handle case where there is only 1 column/row
-    if( width == 1 || height == 1 ) {
-      assert( !( width == 1 && height == 1 ) ); // can't be 1x1
-      halve1Dimage_int( components, width, height, datain, dataout, element_size,
-                            ysize, group_size, myswap_bytes );
-      return;
-    }
-    
-    newwidth = width / 2;
-    newheight = height / 2;
-    
-    // Piece of cake
-    if( !myswap_bytes ) {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            datain.position( t );
-            temp = datain.getInt();
-            datain.position( t + group_size );
-            temp += datain.getInt();
-            datain.position( t + ysize );
-            temp += datain.getInt();
-            datain.position( t + ysize + group_size );
-            temp += datain.getInt();
-            temp = (int)( ( temp / 4.0f ) + 0.5f );
-            dataout.put( temp );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    } else {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            long b;
-            float buf;
-            datain.position( t );
-            b = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            buf = b;
-            datain.position( t + group_size );
-            b = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            buf += b;
-            datain.position( t + ysize );
-            b = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            buf += b;
-            datain.position( t + ysize + group_size );
-            b = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            buf += b;
-            dataout.put( (int)( ( buf / 4.0f ) + 0.5f ) );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    }
-  }
-  
-  public static void halve1Dimage_int( int components, int width, int height,
-              ByteBuffer datain, IntBuffer dataout, int element_size, int ysize,
-              int group_size, boolean myswap_bytes ) {
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int src = 0;
-    int dest = 0;
-    int jj;
-    
-    assert( width == 1 || height == 1 ); // must be 1D
-    assert( width != height ); // can't be square
-    
-    if( height == 1 ) { // 1 row
-      assert( width != 1 ); // can't be 1x1
-      halfHeight = 1;
-      
-      for( jj = 0; jj < halfWidth; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          long[] uint = new long[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            uint[0] = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            datain.position( src + group_size );
-            uint[1] = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-          } else {
-            datain.position( src );
-            uint[0] = ( 0x00000000FFFFFFFF & datain.getInt() );
-            datain.position( src + group_size );
-            uint[1] = ( 0x00000000FFFFFFFF & datain.getInt() );
-          }
-          dataout.put( (int)( ( (float)uint[0] + (float)uint[1] ) / 2.0f) );
-          src += element_size;
-          dest += 4;
-        }
-        src += group_size; // skip to next 2
-      }
-      int padBytes = ysize - ( width * group_size );
-      src += padBytes; // for assertion only
-    } else if( width == 1 ) {
-      int padBytes = ysize - ( width * group_size );
-      assert( height != 1 );
-      halfWidth = 1;
-      // one vertical column with possible pad bytes per row
-      // average two at a time
-      
-      for( jj = 0; jj < halfHeight; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          long[] uint = new long[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            uint[0] = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-            datain.position( src + ysize );
-            uint[1] = ( 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ) );
-          } else {
-            datain.position( src );
-            uint[0] = ( 0x00000000FFFFFFFF & datain.getInt() );
-            datain.position( src + ysize );
-            uint[1] = ( 0x00000000FFFFFFFF & datain.getInt() );
-          }
-          dataout.put( (int)(( (float)uint[0] + (float)uint[1] ) / 2.0f) );
-          src += element_size;
-          dest += 4;
-        }
-        src += padBytes; // add pad bytes, if any, to get to end of row
-        src += ysize;
-      }
-      assert( src == ysize * height );
-    }
-    assert( dest == ( components * element_size * halfWidth * halfHeight ) );
-  }
-  
-  public static void halveImage_float( int components, int width, int height,
-                    ByteBuffer datain, FloatBuffer dataout, int element_size,
-                    int ysize, int group_size, boolean myswap_bytes ) {
-    int i, j, k, l;
-    int newwidth, newheight;
-    int s = 0;
-    int t = 0;
-    float temp = 0.0f;
-    // handle case where there is only 1 column/row
-    if( width == 1 || height == 1 ) {
-      assert( !( width == 1 && height == 1 ) ); // can't be 1x1
-      halve1Dimage_float( components, width, height, datain, dataout, element_size,
-                                              ysize, group_size, myswap_bytes );
-      return;
-    }
-    
-    newwidth = width / 2;
-    newheight = height / 2;
-    
-    // Piece of cake
-    if( !myswap_bytes ) {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            datain.position( t );
-            temp = datain.getFloat();
-            datain.position( t + group_size );
-            temp += datain.getFloat();
-            datain.position( t + ysize );
-            temp += datain.getFloat();
-            datain.position( t + ysize + group_size );
-            temp /= 4.0f;
-            dataout.put( temp );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    } else {
-      for( i = 0; i < newheight; i++ ) {
-        for( j = 0; j < newwidth; j++ ) {
-          for( k = 0; k < components; k++ ) {
-            float buf;
-            datain.position( t );
-            buf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() );
-            datain.position( t + group_size );
-            buf += Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() );
-            datain.position( t + ysize );
-            buf += Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() );
-            datain.position( t + ysize + group_size );
-            buf += Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() );
-            dataout.put( buf / 4.0f );
-            t += element_size;
-          }
-          t += group_size;
-        }
-        t += ysize;
-      }
-    }
-  }
-  
-  public static void halve1Dimage_float( int components, int width, int height,
-              ByteBuffer datain, FloatBuffer dataout, int element_size, int ysize,
-              int group_size, boolean myswap_bytes ) {
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int src = 0;
-    int dest = 0;
-    int jj;
-    
-    assert( width == 1 || height == 1 ); // must be 1D
-    assert( width != height ); // can't be square
-    
-    if( height == 1 ) { // 1 row
-      assert( width != 1 ); // can't be 1x1
-      halfHeight = 1;
-      
-      for( jj = 0; jj < halfWidth; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          float[] sfloat = new float[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            sfloat[0] = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() );
-            datain.position( src + group_size );
-            sfloat[1] = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() );
-          } else {
-            datain.position( src );
-            sfloat[0] = datain.getFloat();
-            datain.position( src + group_size );
-            sfloat[1] = datain.getFloat();
-          }
-          dataout.put( (sfloat[0] + sfloat[1]) / 2.0f );
-          src += element_size;
-          dest += 4;
-        }
-        src += group_size; // skip to next 2
-      }
-      int padBytes = ysize - ( width * group_size );
-      src += padBytes; // for assertion only
-    } else if( width == 1 ) {
-      int padBytes = ysize - ( width * group_size );
-      assert( height != 1 );
-      halfWidth = 1;
-      // one vertical column with possible pad bytes per row
-      // average two at a time
-      
-      for( jj = 0; jj < halfHeight; jj++ ) {
-        int kk;
-        for( kk = 0; kk < components; kk++ ) {
-          float[] sfloat = new float[BOX2];
-          if( myswap_bytes ) {
-            datain.position( src );
-            sfloat[0] = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() );
-            datain.position( src + ysize );
-            sfloat[1] = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() );
-          } else {
-            datain.position( src );
-            sfloat[0] = datain.getFloat();
-            datain.position( src + ysize );
-            sfloat[1] = datain.getFloat();
-          }
-          dataout.put( ( sfloat[0] + sfloat[1] ) / 2.0f );
-          src += element_size;
-          dest += 4;
-        }
-        src += padBytes; // add pad bytes, if any, to get to end of row
-        src += ysize;
-      }
-      assert( src == ysize * height );
-    }
-    assert( dest == ( components * element_size * halfWidth * halfHeight ) );
-  }
-  
-  public static void halveImagePackedPixel( int components, Extract extract, int width, 
-          int height, ByteBuffer datain, ByteBuffer dataout, 
-          int pixelSizeInBytes, int rowSizeInBytes, boolean isSwap ) {
-    if( width == 1 || height == 1 ) {
-      assert( !( width == 1 && height == 1 ) );
-      halve1DimagePackedPixel( components, extract, width, height, datain, dataout,
-                          pixelSizeInBytes, rowSizeInBytes, isSwap );
-      return;
-    }
-    int ii, jj;
-    
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int src = 0;
-    int padBytes = rowSizeInBytes - ( width * pixelSizeInBytes );
-    int outIndex = 0;
-    
-    for( ii = 0; ii < halfHeight; ii++ ) {
-      for( jj = 0; jj < halfWidth; jj++ ) {
-        float totals[] = new float[4];
-        float extractTotals[][] = new float[BOX4][4];
-        int cc;
-        
-        datain.position( src );
-        extract.extract( isSwap, datain, extractTotals[0] );
-        datain.position( src + pixelSizeInBytes );
-        extract.extract( isSwap, datain, extractTotals[1] );
-        datain.position( src + rowSizeInBytes );
-        extract.extract( isSwap, datain, extractTotals[2] );
-        datain.position( src + rowSizeInBytes + pixelSizeInBytes );
-        extract.extract( isSwap, datain, extractTotals[3] );
-        for( cc = 0; cc < components; cc++ ) {
-          int kk = 0;
-          // grab 4 pixels to average
-          totals[cc] = 0.0f;
-          for( kk = 0; kk < BOX4; kk++ ) {
-            totals[cc] += extractTotals[kk][cc];
-          }
-          totals[cc] /= BOX4;
-        }
-        extract.shove( totals, outIndex, dataout );
-        outIndex++;
-        src += pixelSizeInBytes + pixelSizeInBytes;
-      }
-      // skip past pad bytes, if any, to get to next row
-      src += padBytes;
-      src += rowSizeInBytes;
-    }
-    assert( src == rowSizeInBytes * height );
-    assert( outIndex == halfWidth * halfHeight );
-  }
-  
-  public static void halve1DimagePackedPixel( int components, Extract extract, int width,
-              int height, ByteBuffer datain, ByteBuffer dataout,
-              int pixelSizeInBytes, int rowSizeInBytes, boolean isSwap ) {
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int src = 0;
-    int jj;
-    
-    assert( width == 1 || height == 1 );
-    assert( width != height );
-    
-    if( height == 1 ) {
-      int outIndex = 0;
-      
-      assert( width != 1 );
-      halfHeight = 1;
-      
-      // one horizontal row with possible pad bytes
-      
-      for( jj = 0; jj < halfWidth; jj++ ) {
-        float[] totals = new float[4];
-        float[][] extractTotals = new float[BOX2][4];
-        int cc;
-        
-        datain.position( src );
-        extract.extract( isSwap, datain, extractTotals[0] );
-        datain.position( src + pixelSizeInBytes );
-        extract.extract( isSwap, datain, extractTotals[1] );
-        for( cc = 0; cc < components; cc++ ) {
-          int kk = 0;
-          // grab 4 pixels to average
-          totals[cc] = 0.0f;
-          for( kk = 0; kk < BOX2; kk++ ) {
-            totals[cc] += extractTotals[kk][cc];
-          }
-          totals[cc] /= BOX2;
-        }
-        extract.shove( totals, outIndex, dataout );
-        outIndex++;
-        // skip over to next group of 2
-        src += pixelSizeInBytes + pixelSizeInBytes;
-      }
-      int padBytes = rowSizeInBytes - ( width * pixelSizeInBytes );
-      src += padBytes;
-      
-      assert( src == rowSizeInBytes );
-      assert( outIndex == halfWidth * halfHeight );
-    } else if( width == 1 ) {
-      int outIndex = 0;
-      
-      assert( height != 1 );
-      halfWidth = 1;
-      // one vertical volumn with possible pad bytes per row
-      // average two at a time
-      
-      for( jj = 0; jj < halfHeight; jj++ ) {
-        float[] totals = new float[4];
-        float[][] extractTotals = new float[BOX2][4];
-        int cc;
-        // average two at a time, instead of four
-        datain.position( src );
-        extract.extract( isSwap, datain, extractTotals[0] );
-        datain.position( src + rowSizeInBytes );
-        extract.extract( isSwap, datain, extractTotals[1] );
-        for( cc = 0; cc < components; cc++ ) {
-          int kk = 0;
-          // grab 4 pixels to average
-          totals[cc] = 0.0f;
-          for( kk = 0; kk < BOX2; kk++ ) {
-            totals[cc] += extractTotals[kk][cc];
-          }
-          totals[cc] /= BOX2;
-        }
-        extract.shove( totals, outIndex, dataout );
-        outIndex++;
-        // skip over to next group of 2
-        src += rowSizeInBytes + rowSizeInBytes;
-      }
-      assert( src == rowSizeInBytes );
-      assert( outIndex == halfWidth * halfHeight );
-    }
-  }
-  
-  public static void halveImagePackedPixelSlice( int components, Extract extract,
-          int width, int height, int depth, ByteBuffer dataIn,
-          ByteBuffer dataOut, int pixelSizeInBytes, int rowSizeInBytes,
-          int imageSizeInBytes, boolean isSwap ) {
-    int ii, jj;
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int halfDepth = depth / 2;
-    int src = 0;
-    int padBytes = rowSizeInBytes - ( width * pixelSizeInBytes );
-    int outIndex = 0;
-    
-    assert( (width == 1 || height == 1) && depth >= 2 );
-    
-    if( width == height ) {
-      assert( width == 1 && height == 1 );
-      assert( depth >= 2 );
-      
-      for( ii = 0; ii < halfDepth; ii++ ) {
-        float totals[] = new float[4];
-        float extractTotals[][] = new float[BOX2][4];
-        int cc;
-        
-        dataIn.position( src );
-        extract.extract( isSwap, dataIn, extractTotals[0] );
-        dataIn.position( src + imageSizeInBytes );
-        extract.extract( isSwap, dataIn, extractTotals[1] );
-        
-        for( cc = 0; cc < components; cc++ ) {
-          int kk;
-          
-          // average only 2 pixels since a column
-          totals[cc]= 0.0f;
-          for( kk = 0; kk < BOX2; kk++ ) {
-            totals[cc] += extractTotals[kk][cc];
-          }
-          totals[cc] /= BOX2;
-        } // for cc
-        
-        extract.shove( totals, outIndex, dataOut );
-        outIndex++;
-        // skip over to next group of 2
-        src += imageSizeInBytes + imageSizeInBytes;
-      } // for ii
-    } else if( height == 1 ) {
-      assert( width != 1 );
-      
-      for( ii = 0; ii < halfDepth; ii++ ) {
-        for( jj = 0; jj < halfWidth; jj++ ) {
-          float totals[] = new float[4];
-          float extractTotals[][] = new float[BOX4][4];
-          int cc;
-          
-          dataIn.position( src );
-          extract.extract( isSwap, dataIn, extractTotals[0] );
-          dataIn.position( src + pixelSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[1] );
-          dataIn.position( src + imageSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[2] );
-          dataIn.position( src + pixelSizeInBytes + imageSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[3] );
-          
-          for( cc = 0; cc < components; cc++ ) {
-            int kk;
-            
-            // grab 4 pixels to average
-            totals[cc] = 0.0f;
-            for( kk = 0; kk < BOX4; kk++ ) {
-              totals[cc]+= extractTotals[kk][cc];
-            }
-            totals[cc]/= (float)BOX4;
-          }
-          extract.shove( totals, outIndex, dataOut );
-          outIndex++;
-          // skip over to next horizontal square of 4
-          src += imageSizeInBytes + imageSizeInBytes;
-        }
-      }
-    } else if( width == 1 ) {
-      assert( height != 1 );
-      
-      for( ii = 0; ii < halfDepth; ii++ ) {
-        for( jj = 0; jj < halfWidth; jj++ ) {
-          float totals[] = new float[4];
-          float extractTotals[][] = new float[BOX4][4];
-          int cc;
-          
-          dataIn.position( src );
-          extract.extract( isSwap, dataIn, extractTotals[0] );
-          dataIn.position( src + rowSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[1] );
-          dataIn.position( src + imageSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[2] );
-          dataIn.position( src + rowSizeInBytes + imageSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[3] );
-          
-          for( cc = 0; cc < components; cc++ ) {
-            int kk;
-            
-            // grab 4 pixels to average
-            totals[cc] = 0.0f;
-            for( kk = 0; kk < BOX4; kk++ ) {
-              totals[cc]+= extractTotals[kk][cc];
-            }
-            totals[cc]/= (float)BOX4;
-          }
-          extract.shove( totals, outIndex, dataOut );
-          outIndex++;
-          // skip over to next horizontal square of 4
-          src += imageSizeInBytes + imageSizeInBytes;
-        }
-      }
-    }
-  }
-  
-  public static void halveImageSlice( int components, ExtractPrimitive extract, int width,
-          int height, int depth, ByteBuffer dataIn, ByteBuffer dataOut,
-          int elementSizeInBytes, int groupSizeInBytes, int rowSizeInBytes,
-          int imageSizeInBytes, boolean isSwap ) {
-    int ii, jj;
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int halfDepth = depth / 2;
-    int src = 0;
-    int padBytes = rowSizeInBytes - ( width * groupSizeInBytes );
-    int outIndex = 0;
-    
-    assert( (width == 1 || height == 1) && depth >= 2 );
-    
-    if( width == height ) {
-      assert( width == 1 && height == 1 );
-      assert( depth >= 2 );
-      
-      for( ii = 0; ii < halfDepth; ii++ ) {
-        int cc;
-        for( cc = 0; cc < components; cc++ ) {
-          double[] totals = new double[4];
-          double[][] extractTotals = new double[BOX2][4];
-          int kk;
-          
-          dataIn.position( src );
-          extractTotals[0][cc] = extract.extract( isSwap, dataIn );
-          dataIn.position( src + imageSizeInBytes );
-          extractTotals[1][cc] = extract.extract( isSwap, dataIn );
-          
-          // average 2 pixels since only a column
-          totals[cc] = 0.0f;
-          // totals[red] = extractTotals[0][red] + extractTotals[1][red];
-          // totals[red] = red / 2;
-          for( kk = 0; kk < BOX2; kk++ ) {
-            totals[cc] += extractTotals[kk][cc];
-          }
-          totals[cc] /= (double)BOX2;
-          
-          extract.shove( totals[cc], outIndex, dataOut );
-          outIndex++;
-          src += elementSizeInBytes;
-        } // for cc
-        // skip over next group of 2
-        src += rowSizeInBytes;
-      } // for ii
-      
-      assert( src == rowSizeInBytes * height * depth );
-      assert( outIndex == halfDepth * components );
-    } else if( height == 1 ) {
-      assert( width != 1 );
-      
-      for( ii = 0; ii < halfDepth; ii++ ) {
-        for( jj = 0; jj < halfWidth; jj++ ) {
-          int cc;
-          for( cc = 0; cc < components; cc++ ) {
-            int kk;
-            double totals[] = new double[4];
-            double extractTotals[][] = new double[BOX4][4];
-            
-            dataIn.position( src );
-            extractTotals[0][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + groupSizeInBytes );
-            extractTotals[1][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + imageSizeInBytes );
-            extractTotals[2][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + imageSizeInBytes + groupSizeInBytes );
-            extractTotals[3][cc] = extract.extract( isSwap, dataIn );
-            
-            // grab 4 pixels to average
-            totals[cc] = 0.0f;
-            // totals[red] = extractTotals[0][red] + extractTotals[1][red] +
-            //               extractTotals[2][red] + extractTotals[3][red];
-            // totals[red] /= (double)BOX4;
-            for( kk = 0; kk < BOX4; kk++ ) {
-              totals[cc] += extractTotals[kk][cc];
-            }
-            totals[cc] /= (double)BOX4;
-            
-            extract.shove( totals[cc], outIndex, dataOut );
-            outIndex++;
-            src += elementSizeInBytes;
-          } // for cc
-          // skip over to next horizontal square of 4
-          src += elementSizeInBytes;
-        } // for jj
-        src += padBytes;
-        src += rowSizeInBytes;
-      } // for ii
-      assert( src == rowSizeInBytes * height * depth );
-      assert( outIndex == halfWidth * halfDepth * components );
-    } else if( width == 1 ) {
-      assert( height != 1 );
-      
-      for( ii = 0; ii < halfDepth; ii++ ) {
-        for( jj = 0; jj < halfHeight; jj++ ) {
-          int cc;
-          for( cc = 0; cc < components; cc++ ) {
-            int kk;
-            double totals[] = new double[4];
-            double extractTotals[][] = new double[BOX4][4];
-            
-            dataIn.position( src );
-            extractTotals[0][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + rowSizeInBytes );
-            extractTotals[1][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + imageSizeInBytes );
-            extractTotals[2][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + imageSizeInBytes + groupSizeInBytes );
-            extractTotals[3][cc] = extract.extract( isSwap, dataIn );
-            
-            
-            // grab 4 pixels to average
-            totals[cc] = 0.0f;
-            // totals[red] = extractTotals[0][red] + extractTotals[1][red] +
-            //               extractTotals[2][red] + extractTotals[3][red];
-            // totals[red] /= (double)BOX4;
-            for( kk = 0; kk < BOX4; kk++ ) {
-              totals[cc] += extractTotals[kk][cc];
-            }
-            totals[cc] /= (double)BOX4;
-            
-            extract.shove( totals[cc], outIndex, dataOut );
-            outIndex++;
-            src += elementSizeInBytes;
-          } // for cc
-          // skip over to next horizontal square of 4
-          src += padBytes;
-          src += rowSizeInBytes;
-        } // for jj
-        src += imageSizeInBytes;
-      } // for ii
-      assert( src == rowSizeInBytes * height * depth );
-      assert( outIndex == halfWidth * halfDepth * components );
-    }
-  }
-  
-  public static void halveImage3D( int components, ExtractPrimitive extract,
-          int width, int height, int depth, ByteBuffer dataIn, ByteBuffer dataOut,
-          int elementSizeInBytes, int groupSizeInBytes, int rowSizeInBytes,
-          int imageSizeInBytes, boolean isSwap ) {
-    assert( depth > 1 );
-    
-    // horizontal/vertical/onecolumn slice viewed from top
-    if( width == 1 || height == 1 ) {
-      assert( 1 <= depth );
-      
-      halveImageSlice( components, extract, width, height, depth, dataIn, dataOut,
-              elementSizeInBytes, groupSizeInBytes, rowSizeInBytes, imageSizeInBytes,
-              isSwap );
-      return;
-    }
-    
-    int ii, jj, dd;
-    
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int halfDepth = depth / 2;
-    int src = 0;
-    int padBytes = rowSizeInBytes - ( width * groupSizeInBytes );
-    int outIndex = 0;
-    
-    for( dd = 0; dd < halfDepth; dd++ ) {
-      for( ii = 0; ii < halfHeight; ii++ ) {
-        for( jj = 0; jj < halfWidth; jj++ ) {
-          int cc;
-          for( cc = 0; cc < components; cc++ ) {
-            int kk;
-            double totals[] = new double[4];
-            double extractTotals[][] = new double[BOX8][4];
-            
-            dataIn.position( src );
-            extractTotals[0][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + groupSizeInBytes );
-            extractTotals[1][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + rowSizeInBytes );
-            extractTotals[2][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + rowSizeInBytes + groupSizeInBytes );
-            extractTotals[3][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + imageSizeInBytes );
-            extractTotals[4][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + groupSizeInBytes + imageSizeInBytes );
-            extractTotals[5][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + rowSizeInBytes + imageSizeInBytes );
-            extractTotals[6][cc] = extract.extract( isSwap, dataIn );
-            dataIn.position( src + rowSizeInBytes + imageSizeInBytes + groupSizeInBytes );
-            extractTotals[7][cc] = extract.extract( isSwap, dataIn );
-            
-            totals[cc] = 0.0f;
-            
-            for( kk = 0; kk < BOX8; kk++ ) {
-              totals[cc] += extractTotals[kk][cc];
-            }
-            totals[cc] /= (double)BOX8;
-            
-            extract.shove( totals[cc], outIndex, dataOut );
-            outIndex++;
-            
-            src += elementSizeInBytes;
-          } // for cc
-          // skip over to next square of 4
-          src += groupSizeInBytes;
-        } // for jj
-        // skip past pad bytes, if any, to get to next row
-        src += padBytes;
-        src += rowSizeInBytes;
-      } // for ii
-      src += imageSizeInBytes;
-    } // for dd
-    assert( src == rowSizeInBytes * height * depth );
-    assert( outIndex == halfWidth * halfHeight * halfDepth * components );
-  }
-  
-  public static void halveImagePackedPixel3D( int components, Extract extract,
-          int width, int height, int depth, ByteBuffer dataIn, 
-          ByteBuffer dataOut, int pixelSizeInBytes, int rowSizeInBytes,
-          int imageSizeInBytes, boolean isSwap ) {
-    if( depth == 1 ) {
-      assert( 1 <= width && 1 <= height );
-      
-      halveImagePackedPixel( components, extract, width, height, dataIn, dataOut,
-              pixelSizeInBytes, rowSizeInBytes, isSwap );
-      return;
-    } else if( width == 1 || height == 1 ) { // a horizontal or vertical slice viewed from top
-      assert( 1 <= depth );
-      
-      halveImagePackedPixelSlice( components, extract, width, height, depth, dataIn,
-              dataOut, pixelSizeInBytes, rowSizeInBytes, imageSizeInBytes, isSwap );
-      return;
-    }
-    int ii, jj, dd;
-    
-    int halfWidth = width / 2;
-    int halfHeight = height / 2;
-    int halfDepth = depth / 2;
-    int src = 0;
-    int padBytes = rowSizeInBytes - ( width * pixelSizeInBytes );
-    int outIndex = 0;
-    
-    for( dd = 0; dd < halfDepth; dd++ ) {
-      for( ii = 0; ii < halfHeight; ii++ ) {
-        for( jj = 0; jj < halfWidth; jj++ ) {
-          float totals[] = new float[4]; // 4 is max components
-          float extractTotals[][] = new float[BOX8][4];
-          int cc;
-          
-          dataIn.position( src );
-          extract.extract( isSwap, dataIn, extractTotals[0] );
-          dataIn.position( src + pixelSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[1] );
-          dataIn.position( src + rowSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[2] );
-          dataIn.position( src + rowSizeInBytes + pixelSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[3] );
-          dataIn.position( src + imageSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[4] );
-          dataIn.position( src + pixelSizeInBytes + imageSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[5] );
-          dataIn.position( src + rowSizeInBytes + imageSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[6] );
-          dataIn.position( src + rowSizeInBytes + pixelSizeInBytes + imageSizeInBytes );
-          extract.extract( isSwap, dataIn, extractTotals[7] );
-          
-          for( cc = 0; cc < components; cc++ ) {
-            int kk;
-            // grab 8 pixels to average
-            totals[cc] = 0.0f;
-            for( kk = 0; kk < BOX8; kk++ ) {
-              totals[cc] += extractTotals[kk][cc];
-            }
-            totals[cc] /= (float)BOX8;
-          }
-          extract.shove( totals, outIndex, dataOut );
-          outIndex++;
-          // skip over to next square of 4
-          src += pixelSizeInBytes + pixelSizeInBytes;
-        }
-        // skip past pad bytes, if any, to get to next row
-        src += padBytes;
-        src += rowSizeInBytes;
-      }
-      src += imageSizeInBytes;
-    }
-    assert( src == rowSizeInBytes * height * depth );
-    assert( outIndex == halfWidth * halfHeight * halfDepth );
-  }
-}