SGI SI GLU library

7 files changed, 10717 insertions, 0 deletions

diff --git a/src/glu/sgi/libutil/error.c b/src/glu/sgi/libutil/error.c
new file mode 100644
index 00000000000..7c8f065f6f3
--- /dev/null
+++ b/src/glu/sgi/libutil/error.c
@@ -0,0 +1,87 @@
+/*
+** 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.
+**
+** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libutil/error.c,v 1.1 2001/03/17 00:25:41 brianp Exp $
+*/
+
+#include "gluos.h"
+#include "gluint.h"
+#include <GL/glu.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static const char *glErrorStrings[GL_OUT_OF_MEMORY - GL_INVALID_ENUM + 1] = {
+    "invalid enumerant",
+    "invalid value",
+    "invalid operation",
+    "stack overflow",
+    "stack underflow",
+    "out of memory",
+};
+
+static const char *gluErrorStrings[GLU_INVALID_OPERATION - GLU_INVALID_ENUM + 1] = {
+    "invalid enumerant",
+    "invalid value",
+    "out of memory",
+    "",				/* never used but need placeholder */
+    "invalid operation",
+};
+
+#define NERRORS (sizeof(errorStrings)/sizeof(errorStrings[0]))
+
+const GLubyte* GLAPIENTRY
+gluErrorString(GLenum errorCode)
+{
+    if (errorCode == 0) {
+	return (const unsigned char *) "no error";
+    }
+    if ((errorCode >= GL_INVALID_ENUM) && (errorCode <= GL_OUT_OF_MEMORY)) {
+	return (const unsigned char *) glErrorStrings[errorCode - GL_INVALID_ENUM];
+    }
+    if (errorCode == GL_TABLE_TOO_LARGE) {
+        return (const unsigned char *) "table too large";
+    }
+    if ((errorCode >= GLU_INVALID_ENUM) && (errorCode <= GLU_INVALID_OPERATION)) {
+	return (const unsigned char *) gluErrorStrings[errorCode - GLU_INVALID_ENUM];
+    }
+    if ((errorCode >= GLU_NURBS_ERROR1) && (errorCode <= GLU_NURBS_ERROR37)) {
+	return (const unsigned char *) __gluNURBSErrorString(errorCode - (GLU_NURBS_ERROR1 - 1));
+    }
+    if ((errorCode >= GLU_TESS_ERROR1) && (errorCode <= GLU_TESS_ERROR8)) {
+	return (const unsigned char *) __gluTessErrorString(errorCode - (GLU_TESS_ERROR1 - 1));
+    }
+
+    return 0;
+}
+
diff --git a/src/glu/sgi/libutil/glue.c b/src/glu/sgi/libutil/glue.c
new file mode 100644
index 00000000000..a5fcb8dd496
--- /dev/null
+++ b/src/glu/sgi/libutil/glue.c
@@ -0,0 +1,100 @@
+/*
+** 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.
+**
+** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libutil/glue.c,v 1.1 2001/03/17 00:25:41 brianp Exp $
+*/
+
+#include <stdlib.h>
+#include "gluint.h"
+
+static char *__gluNurbsErrors[] = {
+    " ",
+    "spline order un-supported",
+    "too few knots",
+    "valid knot range is empty",
+    "decreasing knot sequence knot",
+    "knot multiplicity greater than order of spline",
+    "gluEndCurve() must follow gluBeginCurve()",
+    "gluBeginCurve() must precede gluEndCurve()",
+    "missing or extra geometric data",
+    "can't draw piecewise linear trimming curves",
+    "missing or extra domain data",
+    "missing or extra domain data",
+    "gluEndTrim() must precede gluEndSurface()",
+    "gluBeginSurface() must precede gluEndSurface()",
+    "curve of improper type passed as trim curve",
+    "gluBeginSurface() must precede gluBeginTrim()",
+    "gluEndTrim() must follow gluBeginTrim()",
+    "gluBeginTrim() must precede gluEndTrim()",
+    "invalid or missing trim curve",
+    "gluBeginTrim() must precede gluPwlCurve()",
+    "piecewise linear trimming curve referenced twice",
+    "piecewise linear trimming curve and nurbs curve mixed",
+    "improper usage of trim data type",
+    "nurbs curve referenced twice",
+    "nurbs curve and piecewise linear trimming curve mixed",
+    "nurbs surface referenced twice",
+    "invalid property",
+    "gluEndSurface() must follow gluBeginSurface()",
+    "intersecting or misoriented trim curves",
+    "intersecting trim curves",
+    "UNUSED",
+    "unconnected trim curves",
+    "unknown knot error",
+    "negative vertex count encountered",
+    "negative byte-stride encounteed",
+    "unknown type descriptor",
+    "null control point reference",
+    "duplicate point on piecewise linear trimming curve",
+};
+
+const char *__gluNURBSErrorString( int errno )
+{
+    return __gluNurbsErrors[errno];
+}
+
+static char *__gluTessErrors[] = {
+    " ",
+    "gluTessBeginPolygon() must precede a gluTessEndPolygon()",
+    "gluTessBeginContour() must precede a gluTessEndContour()",
+    "gluTessEndPolygon() must follow a gluTessBeginPolygon()",
+    "gluTessEndContour() must follow a gluTessBeginContour()",
+    "a coordinate is too large",
+    "need combine callback",
+};
+
+const char *__gluTessErrorString( int errno )
+{
+    return __gluTessErrors[errno];
+} /* __glTessErrorString() */
diff --git a/src/glu/sgi/libutil/gluint.h b/src/glu/sgi/libutil/gluint.h
new file mode 100644
index 00000000000..c04c5acda0e
--- /dev/null
+++ b/src/glu/sgi/libutil/gluint.h
@@ -0,0 +1,55 @@
+/*
+** 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.
+**
+** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libutil/gluint.h,v 1.1 2001/03/17 00:25:41 brianp Exp $
+*/
+
+#ifndef __gluint_h__
+#define __gluint_h__
+
+extern const char *__gluNURBSErrorString( int errno );
+
+extern const char *__gluTessErrorString( int errno );
+
+#ifdef _EXTENSIONS_
+#define COS cosf
+#define SIN sinf
+#define SQRT sqrtf
+#else
+#define COS cos
+#define SIN sin
+#define SQRT sqrt
+#endif
+
+#endif /* __gluint_h__ */
diff --git a/src/glu/sgi/libutil/mipmap.c b/src/glu/sgi/libutil/mipmap.c
new file mode 100644
index 00000000000..2538f7df28e
--- /dev/null
+++ b/src/glu/sgi/libutil/mipmap.c
@@ -0,0 +1,8832 @@
+/*
+** 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.
+**
+** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libutil/mipmap.c,v 1.1 2001/03/17 00:25:41 brianp Exp $
+*/
+
+#include "gluos.h"
+#include <assert.h>
+#include <GL/glu.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>		/* UINT_MAX */
+#include <math.h>
+#include "gluint.h"
+
+typedef union {
+    unsigned char ub[4];
+    unsigned short us[2];
+    unsigned int ui;
+    char b[4];
+    short s[2];
+    int i;
+    float f;
+} Type_Widget;
+
+/* Pixel storage modes */ 
+typedef struct {
+   GLint pack_alignment;
+   GLint pack_row_length; 
+   GLint pack_skip_rows;  
+   GLint pack_skip_pixels;
+   GLint pack_lsb_first;
+   GLint pack_swap_bytes;
+   GLint pack_skip_images;
+   GLint pack_image_height;
+
+   GLint unpack_alignment;
+   GLint unpack_row_length;
+   GLint unpack_skip_rows;
+   GLint unpack_skip_pixels;
+   GLint unpack_lsb_first;
+   GLint unpack_swap_bytes;
+   GLint unpack_skip_images;
+   GLint unpack_image_height;
+} PixelStorageModes;
+
+static int gluBuild1DMipmapLevelsCore(GLenum, GLint, 
+				      GLsizei,
+				      GLsizei,
+				      GLenum, GLenum, GLint, GLint, GLint, 
+				      const void *);
+static int gluBuild2DMipmapLevelsCore(GLenum, GLint, 
+				      GLsizei, GLsizei, 
+				      GLsizei, GLsizei, 
+				      GLenum, GLenum, GLint, GLint, GLint, 
+				      const void *);
+static int gluBuild3DMipmapLevelsCore(GLenum, GLint, 
+				      GLsizei, GLsizei, GLsizei,
+				      GLsizei, GLsizei, GLsizei,
+				      GLenum, GLenum, GLint, GLint, GLint, 
+				      const void *);
+
+/*
+ * internal function declarations
+ */
+static GLfloat bytes_per_element(GLenum type);
+static GLint elements_per_group(GLenum format, GLenum type);
+static GLint is_index(GLenum format);
+static GLint image_size(GLint width, GLint height, GLenum format, GLenum type);
+static void fill_image(const PixelStorageModes *,
+		       GLint width, GLint height, GLenum format, 
+		       GLenum type, GLboolean index_format, 
+		       const void *userdata, GLushort *newimage);
+static void empty_image(const PixelStorageModes *,
+			GLint width, GLint height, GLenum format, 
+		        GLenum type, GLboolean index_format, 
+			const GLushort *oldimage, void *userdata);
+static void scale_internal(GLint components, GLint widthin, GLint heightin, 
+			   const GLushort *datain, 
+			   GLint widthout, GLint heightout, 
+			   GLushort *dataout);
+
+static void scale_internal_ubyte(GLint components, GLint widthin, 
+		   	   GLint heightin, const GLubyte *datain, 
+			   GLint widthout, GLint heightout, 
+			   GLubyte *dataout, GLint element_size,
+			   GLint ysize, GLint group_size);
+static void scale_internal_byte(GLint components, GLint widthin,
+                           GLint heightin, const GLbyte *datain,
+                           GLint widthout, GLint heightout,
+                           GLbyte *dataout, GLint element_size,
+                           GLint ysize, GLint group_size);
+static void scale_internal_ushort(GLint components, GLint widthin,
+                           GLint heightin, const GLushort *datain,
+                           GLint widthout, GLint heightout,
+                           GLushort *dataout, GLint element_size,
+                           GLint ysize, GLint group_size,
+                           GLint myswap_bytes);
+static void scale_internal_short(GLint components, GLint widthin,
+                           GLint heightin, const GLshort *datain,
+                           GLint widthout, GLint heightout,
+                           GLshort *dataout, GLint element_size,
+                           GLint ysize, GLint group_size,
+                           GLint myswap_bytes);
+static void scale_internal_uint(GLint components, GLint widthin,
+                           GLint heightin, const GLuint *datain,
+                           GLint widthout, GLint heightout,
+                           GLuint *dataout, GLint element_size,
+                           GLint ysize, GLint group_size,
+                           GLint myswap_bytes);
+static void scale_internal_int(GLint components, GLint widthin,
+                           GLint heightin, const GLint *datain,
+                           GLint widthout, GLint heightout,
+                           GLint *dataout, GLint element_size,
+                           GLint ysize, GLint group_size,
+                           GLint myswap_bytes);
+static void scale_internal_float(GLint components, GLint widthin,
+                           GLint heightin, const GLfloat *datain,
+                           GLint widthout, GLint heightout,
+                           GLfloat *dataout, GLint element_size,
+                           GLint ysize, GLint group_size,
+                           GLint myswap_bytes);
+
+static int checkMipmapArgs(GLenum, GLenum, GLenum);
+static GLboolean legalFormat(GLenum);
+static GLboolean legalType(GLenum);
+static GLboolean isTypePackedPixel(GLenum);
+static GLboolean isLegalFormatForPackedPixelType(GLenum, GLenum);
+static GLboolean isLegalLevels(GLint, GLint, GLint, GLint);
+static void closestFit(GLenum, GLint, GLint, GLint, GLenum, GLenum,
+		       GLint *, GLint *);
+
+/* all extract/shove routines must return double to handle unsigned ints */
+static GLdouble extractUbyte(int, const void *);
+static void shoveUbyte(GLdouble, int, void *);
+static GLdouble extractSbyte(int, const void *);
+static void shoveSbyte(GLdouble, int, void *);
+static GLdouble extractUshort(int, const void *);
+static void shoveUshort(GLdouble, int, void *);
+static GLdouble extractSshort(int, const void *);
+static void shoveSshort(GLdouble, int, void *);
+static GLdouble extractUint(int, const void *);
+static void shoveUint(GLdouble, int, void *);
+static GLdouble extractSint(int, const void *);
+static void shoveSint(GLdouble, int, void *);
+static GLdouble extractFloat(int, const void *);
+static void shoveFloat(GLdouble, int, void *);
+static void halveImageSlice(int, GLdouble (*)(int, const void *),
+			    void (*)(GLdouble, int, void *),
+			    GLint, GLint, GLint,
+			    const void *, void *,
+			    GLint, GLint, GLint, GLint, GLint);
+static void halveImage3D(int, GLdouble (*)(int, const void *),
+			 void (*)(GLdouble, int, void *),
+			 GLint, GLint, GLint,
+			 const void *, void *,
+			 GLint, GLint, GLint, GLint, GLint);
+
+/* packedpixel type scale routines */
+static void extract332(int,const void *, GLfloat []);
+static void shove332(const GLfloat [],int ,void *);
+static void extract233rev(int,const void *, GLfloat []);
+static void shove233rev(const GLfloat [],int ,void *);
+static void extract565(int,const void *, GLfloat []);
+static void shove565(const GLfloat [],int ,void *);
+static void extract565rev(int,const void *, GLfloat []);
+static void shove565rev(const GLfloat [],int ,void *);
+static void extract4444(int,const void *, GLfloat []);
+static void shove4444(const GLfloat [],int ,void *);
+static void extract4444rev(int,const void *, GLfloat []);
+static void shove4444rev(const GLfloat [],int ,void *);
+static void extract5551(int,const void *, GLfloat []);
+static void shove5551(const GLfloat [],int ,void *);
+static void extract1555rev(int,const void *, GLfloat []);
+static void shove1555rev(const GLfloat [],int ,void *);
+static void extract8888(int,const void *, GLfloat []);
+static void shove8888(const GLfloat [],int ,void *);
+static void extract8888rev(int,const void *, GLfloat []);
+static void shove8888rev(const GLfloat [],int ,void *);
+static void extract1010102(int,const void *, GLfloat []);
+static void shove1010102(const GLfloat [],int ,void *);
+static void extract2101010rev(int,const void *, GLfloat []);
+static void shove2101010rev(const GLfloat [],int ,void *);
+static void scaleInternalPackedPixel(int,
+				     void (*)(int, const void *,GLfloat []),
+				     void (*)(const GLfloat [],int, void *),
+				     GLint,GLint, const void *,
+				     GLint,GLint,void *,GLint,GLint,GLint);
+static void halveImagePackedPixel(int,
+				  void (*)(int, const void *,GLfloat []),
+				  void (*)(const GLfloat [],int, void *),
+				  GLint, GLint, const void *,
+				  void *, GLint, GLint, GLint);
+static void halve1DimagePackedPixel(int,
+				    void (*)(int, const void *,GLfloat []),
+				    void (*)(const GLfloat [],int, void *),
+				    GLint, GLint, const void *,
+				    void *, GLint, GLint, GLint);
+
+static void halve1Dimage_ubyte(GLint, GLuint, GLuint,const GLubyte *,
+			       GLubyte *, GLint, GLint, GLint);
+static void halve1Dimage_byte(GLint, GLuint, GLuint,const GLbyte *, GLbyte *, 
+			      GLint, GLint, GLint);
+static void halve1Dimage_ushort(GLint, GLuint, GLuint, const GLushort *,
+				GLushort *, GLint, GLint, GLint, GLint);
+static void halve1Dimage_short(GLint, GLuint, GLuint,const GLshort *, GLshort *, 
+			       GLint, GLint, GLint, GLint);
+static void halve1Dimage_uint(GLint, GLuint, GLuint, const GLuint *, GLuint *, 
+			      GLint, GLint, GLint, GLint);
+static void halve1Dimage_int(GLint, GLuint, GLuint, const GLint *, GLint *, 
+			     GLint, GLint, GLint, GLint);
+static void halve1Dimage_float(GLint, GLuint, GLuint, const GLfloat *, GLfloat *, 
+			       GLint, GLint, GLint, GLint);
+
+static GLint imageSize3D(GLint, GLint, GLint, GLenum,GLenum);
+static void fillImage3D(const PixelStorageModes *, GLint, GLint, GLint,GLenum, 
+			GLenum, GLboolean, const void *, GLushort *);
+static void emptyImage3D(const PixelStorageModes *,
+			 GLint, GLint, GLint, GLenum, 
+			 GLenum, GLboolean, 
+			 const GLushort *, void *);
+static void scaleInternal3D(GLint, GLint, GLint, GLint, const GLushort *, 
+			    GLint, GLint, GLint, GLushort *);
+
+static void retrieveStoreModes(PixelStorageModes *psm)
+{
+    glGetIntegerv(GL_UNPACK_ALIGNMENT, &psm->unpack_alignment);
+    glGetIntegerv(GL_UNPACK_ROW_LENGTH, &psm->unpack_row_length);
+    glGetIntegerv(GL_UNPACK_SKIP_ROWS, &psm->unpack_skip_rows);
+    glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &psm->unpack_skip_pixels);
+    glGetIntegerv(GL_UNPACK_LSB_FIRST, &psm->unpack_lsb_first);
+    glGetIntegerv(GL_UNPACK_SWAP_BYTES, &psm->unpack_swap_bytes);
+
+    glGetIntegerv(GL_PACK_ALIGNMENT, &psm->pack_alignment);
+    glGetIntegerv(GL_PACK_ROW_LENGTH, &psm->pack_row_length);
+    glGetIntegerv(GL_PACK_SKIP_ROWS, &psm->pack_skip_rows);
+    glGetIntegerv(GL_PACK_SKIP_PIXELS, &psm->pack_skip_pixels);
+    glGetIntegerv(GL_PACK_LSB_FIRST, &psm->pack_lsb_first);
+    glGetIntegerv(GL_PACK_SWAP_BYTES, &psm->pack_swap_bytes);
+}
+
+static void retrieveStoreModes3D(PixelStorageModes *psm)
+{
+    glGetIntegerv(GL_UNPACK_ALIGNMENT, &psm->unpack_alignment);
+    glGetIntegerv(GL_UNPACK_ROW_LENGTH, &psm->unpack_row_length);
+    glGetIntegerv(GL_UNPACK_SKIP_ROWS, &psm->unpack_skip_rows);
+    glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &psm->unpack_skip_pixels);
+    glGetIntegerv(GL_UNPACK_LSB_FIRST, &psm->unpack_lsb_first);
+    glGetIntegerv(GL_UNPACK_SWAP_BYTES, &psm->unpack_swap_bytes);
+    glGetIntegerv(GL_UNPACK_SKIP_IMAGES, &psm->unpack_skip_images);
+    glGetIntegerv(GL_UNPACK_IMAGE_HEIGHT, &psm->unpack_image_height);
+
+    glGetIntegerv(GL_PACK_ALIGNMENT, &psm->pack_alignment);
+    glGetIntegerv(GL_PACK_ROW_LENGTH, &psm->pack_row_length);
+    glGetIntegerv(GL_PACK_SKIP_ROWS, &psm->pack_skip_rows);
+    glGetIntegerv(GL_PACK_SKIP_PIXELS, &psm->pack_skip_pixels);
+    glGetIntegerv(GL_PACK_LSB_FIRST, &psm->pack_lsb_first);
+    glGetIntegerv(GL_PACK_SWAP_BYTES, &psm->pack_swap_bytes);
+    glGetIntegerv(GL_PACK_SKIP_IMAGES, &psm->pack_skip_images);
+    glGetIntegerv(GL_PACK_IMAGE_HEIGHT, &psm->pack_image_height);
+}
+
+static int computeLog(GLuint value)
+{
+    int i;
+
+    i = 0;
+
+    /* Error! */
+    if (value == 0) return -1;
+
+    for (;;) {
+	if (value & 1) {
+	    /* Error ! */
+	    if (value != 1) return -1;
+	    return i;
+	}
+	value = value >> 1;
+	i++;
+    }
+}
+
+/* 
+** Compute the nearest power of 2 number.  This algorithm is a little 
+** strange, but it works quite well.
+*/
+static int nearestPower(GLuint value)
+{
+    int i;
+
+    i = 1;
+
+    /* Error! */
+    if (value == 0) return -1;
+
+    for (;;) {
+	if (value == 1) {
+	    return i;
+	} else if (value == 3) {
+	    return i*4;
+	}
+	value = value >> 1;
+	i *= 2;
+    }
+}
+
+#define __GLU_SWAP_2_BYTES(s)\
+(GLushort)(((GLushort)((const GLubyte*)(s))[1])<<8 | ((const GLubyte*)(s))[0])
+
+#define __GLU_SWAP_4_BYTES(s)\
+(GLuint)(((GLuint)((const GLubyte*)(s))[3])<<24 | \
+	((GLuint)((const GLubyte*)(s))[2])<<16 | \
+	((GLuint)((const GLubyte*)(s))[1])<<8  | ((const GLubyte*)(s))[0])
+
+static void halveImage(GLint components, GLuint width, GLuint height, 
+		       const GLushort *datain, GLushort *dataout)
+{
+    int i, j, k;
+    int newwidth, newheight;
+    int delta;
+    GLushort *s;
+    const GLushort *t;
+
+    newwidth = width / 2;
+    newheight = height / 2;
+    delta = width * components;
+    s = dataout;
+    t = datain;
+
+    /* Piece o' cake! */
+    for (i = 0; i < newheight; i++) {
+	for (j = 0; j < newwidth; j++) {
+	    for (k = 0; k < components; k++) {
+		s[0] = (t[0] + t[components] + t[delta] + 
+			t[delta+components] + 2) / 4;
+		s++; t++;
+	    }
+	    t += components;
+	}
+	t += delta;
+    }
+}
+
+static void halveImage_ubyte(GLint components, GLuint width, GLuint height, 
+			const GLubyte *datain, GLubyte *dataout,
+			GLint element_size, GLint ysize, GLint group_size)
+{
+    int i, j, k;
+    int newwidth, newheight;
+    GLubyte *s;
+    const char *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 = dataout;
+    t = (const char *)datain;
+
+    /* Piece o' cake! */
+    for (i = 0; i < newheight; i++) {
+	for (j = 0; j < newwidth; j++) {
+	    for (k = 0; k < components; k++) {
+                s[0] = (*(const GLubyte*)t + 
+			*(const GLubyte*)(t+group_size) +
+                        *(const GLubyte*)(t+ysize) +
+                        *(const GLubyte*)(t+ysize+group_size) + 2) / 4;
+                s++; t += element_size;
+	    }
+	    t += group_size;
+	}
+	t += ysize;
+    }
+}
+
+/* */
+static void halve1Dimage_ubyte(GLint components, GLuint width, GLuint height, 
+			       const GLubyte *dataIn, GLubyte *dataOut, 
+			       GLint element_size, GLint ysize, 
+			       GLint group_size)
+{
+   GLint halfWidth= width / 2;
+   GLint halfHeight= height / 2;
+   const char *src= (const char *) dataIn;
+   GLubyte *dest= dataOut;
+   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 1x1 */
+      halfHeight= 1;
+
+      for (jj= 0; jj< halfWidth; jj++) {
+	 int kk;
+	 for (kk= 0; kk< components; kk++) {
+	    *dest= (*(const GLubyte*)src +
+		 *(const GLubyte*)(src+group_size)) / 2;
+
+	    src+= element_size;
+	    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);	/* widthxheight can't be 1x1 */
+      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++) {
+	    *dest= (*(const GLubyte*)src + *(const GLubyte*)(src+ysize)) / 2;
+
+	    src+= element_size;
+	    dest++;
+	 }  
+	 src+= padBytes; /* add pad bytes, if any, to get to end to row */
+	 src+= ysize;
+      }
+   }
+
+   assert(src == &((const char *)dataIn)[ysize*height]);
+   assert((char *)dest == &((char *)dataOut)
+	  [components * element_size * halfWidth * halfHeight]);
+} /* halve1Dimage_ubyte() */
+
+static void halveImage_byte(GLint components, GLuint width, GLuint height, 
+			const GLbyte *datain, GLbyte *dataout,
+			GLint element_size,
+			GLint ysize, GLint group_size)
+{
+    int i, j, k;
+    int newwidth, newheight;
+    GLbyte *s;
+    const char *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_byte(components,width,height,datain,dataout,
+			 element_size,ysize,group_size);
+       return;
+    }
+
+    newwidth = width / 2;
+    newheight = height / 2;
+    s = dataout;
+    t = (const char *)datain;
+
+    /* Piece o' cake! */
+    for (i = 0; i < newheight; i++) {
+	for (j = 0; j < newwidth; j++) {
+	    for (k = 0; k < components; k++) {
+                s[0] = (*(const GLbyte*)t + 
+			*(const GLbyte*)(t+group_size) +
+                        *(const GLbyte*)(t+ysize) +
+                        *(const GLbyte*)(t+ysize+group_size) + 2) / 4;
+                s++; t += element_size;
+	    }
+	    t += group_size;
+	}
+	t += ysize;
+    }
+}
+
+static void halve1Dimage_byte(GLint components, GLuint width, GLuint height, 
+			      const GLbyte *dataIn, GLbyte *dataOut, 
+			      GLint element_size,GLint ysize, GLint group_size)
+{
+   GLint halfWidth= width / 2;
+   GLint halfHeight= height / 2;
+   const char *src= (const char *) dataIn;
+   GLbyte *dest= dataOut;
+   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 1x1 */
+      halfHeight= 1;
+
+      for (jj= 0; jj< halfWidth; jj++) {
+	 int kk;
+	 for (kk= 0; kk< components; kk++) {
+	    *dest= (*(const GLbyte*)src + *(const GLbyte*)(src+group_size)) / 2;
+
+	    src+= element_size;
+	    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);	/* widthxheight can't be 1x1 */
+      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++) {
+	    *dest= (*(const GLbyte*)src + *(const GLbyte*)(src+ysize)) / 2;
+
+	    src+= element_size;
+	    dest++;
+	 }  
+	 src+= padBytes; /* add pad bytes, if any, to get to end to row */
+	 src+= ysize;
+      }
+
+      assert(src == &((const char *)dataIn)[ysize*height]);
+   }
+
+   assert((char *)dest == &((char *)dataOut)
+	  [components * element_size * halfWidth * halfHeight]);
+} /* halve1Dimage_byte() */
+
+static void halveImage_ushort(GLint components, GLuint width, GLuint height, 
+		        const GLushort *datain, GLushort *dataout,
+			GLint element_size, GLint ysize, GLint group_size,
+			GLint myswap_bytes)
+{
+    int i, j, k, l;
+    int newwidth, newheight;
+    GLushort *s;
+    const char *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_ushort(components,width,height,datain,dataout,
+			   element_size,ysize,group_size, myswap_bytes);
+       return;
+    }
+
+    newwidth = width / 2;
+    newheight = height / 2;
+    s = dataout;
+    t = (const char *)datain;
+
+    /* Piece o' cake! */
+    if (!myswap_bytes)
+    for (i = 0; i < newheight; i++) {
+	for (j = 0; j < newwidth; j++) {
+	    for (k = 0; k < components; k++) {
+		s[0] = (*(const GLushort*)t + 
+			*(const GLushort*)(t+group_size) + 
+			*(const GLushort*)(t+ysize) + 
+			*(const GLushort*)(t+ysize+group_size) + 2) / 4;
+		s++; 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++) {
+		s[0] = (__GLU_SWAP_2_BYTES(t) +
+			__GLU_SWAP_2_BYTES(t+group_size) +
+			__GLU_SWAP_2_BYTES(t+ysize) +
+			__GLU_SWAP_2_BYTES(t+ysize+group_size)+ 2)/4;
+                s++; t += element_size;
+	    }
+	    t += group_size;
+        }
+        t += ysize;
+    }
+}
+
+static void halve1Dimage_ushort(GLint components, GLuint width, GLuint height, 
+				const GLushort *dataIn, GLushort *dataOut, 
+				GLint element_size, GLint ysize, 
+				GLint group_size, GLint myswap_bytes)
+{
+   GLint halfWidth= width / 2;
+   GLint halfHeight= height / 2;
+   const char *src= (const char *) dataIn;
+   GLushort *dest= dataOut;
+   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 1x1 */
+      halfHeight= 1;
+
+      for (jj= 0; jj< halfWidth; jj++) {
+	 int kk;
+	 for (kk= 0; kk< components; kk++) {
+#define BOX2 2
+	    GLushort ushort[BOX2];
+	    if (myswap_bytes) {
+	       ushort[0]= __GLU_SWAP_2_BYTES(src);
+	       ushort[1]= __GLU_SWAP_2_BYTES(src+group_size);
+	    }
+	    else {
+	       ushort[0]= *(const GLushort*)src;
+	       ushort[1]= *(const GLushort*)(src+group_size);
+	    }
+
+	    *dest= (ushort[0] + ushort[1]) / 2;
+	    src+= element_size;
+	    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);	/* widthxheight can't be 1x1 */
+      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++) {
+#define BOX2 2
+	    GLushort ushort[BOX2];
+	    if (myswap_bytes) {
+	       ushort[0]= __GLU_SWAP_2_BYTES(src);
+	       ushort[1]= __GLU_SWAP_2_BYTES(src+ysize);
+	    }
+	    else {
+	       ushort[0]= *(const GLushort*)src;
+	       ushort[1]= *(const GLushort*)(src+ysize);
+	    }
+	    *dest= (ushort[0] + ushort[1]) / 2;
+
+	    src+= element_size;
+	    dest++;
+	 }  
+	 src+= padBytes; /* add pad bytes, if any, to get to end to row */
+	 src+= ysize;
+      }
+
+      assert(src == &((const char *)dataIn)[ysize*height]);
+   }
+
+   assert((char *)dest == &((char *)dataOut)
+	  [components * element_size * halfWidth * halfHeight]);
+
+} /* halve1Dimage_ushort() */
+
+
+static void halveImage_short(GLint components, GLuint width, GLuint height, 
+			const GLshort *datain, GLshort *dataout,
+			GLint element_size, GLint ysize, GLint group_size,
+			GLint myswap_bytes)
+{
+    int i, j, k, l;
+    int newwidth, newheight;
+    GLshort *s;
+    const char *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_short(components,width,height,datain,dataout,
+			  element_size,ysize,group_size, myswap_bytes);
+       return;
+    }
+
+    newwidth = width / 2;
+    newheight = height / 2;
+    s = dataout;
+    t = (const char *)datain;
+
+    /* Piece o' cake! */
+    if (!myswap_bytes)
+    for (i = 0; i < newheight; i++) {
+	for (j = 0; j < newwidth; j++) {
+	    for (k = 0; k < components; k++) {
+		s[0] = (*(const GLshort*)t + 
+			*(const GLshort*)(t+group_size) + 
+			*(const GLshort*)(t+ysize) + 
+			*(const GLshort*)(t+ysize+group_size) + 2) / 4;
+		s++; 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++) {
+		GLushort b;
+		GLint buf;
+                b = __GLU_SWAP_2_BYTES(t);
+		buf = *(const GLshort*)&b;
+                b = __GLU_SWAP_2_BYTES(t+group_size);
+		buf += *(const GLshort*)&b;
+                b = __GLU_SWAP_2_BYTES(t+ysize);
+		buf += *(const GLshort*)&b;
+                b = __GLU_SWAP_2_BYTES(t+ysize+group_size);
+		buf += *(const GLshort*)&b;
+		s[0] = (GLshort)((buf+2)/4);
+                s++; t += element_size;
+	    }
+	    t += group_size;
+        }
+        t += ysize;
+    }
+}
+
+static void halve1Dimage_short(GLint components, GLuint width, GLuint height, 
+				const GLshort *dataIn, GLshort *dataOut, 
+				GLint element_size, GLint ysize, 
+				GLint group_size, GLint myswap_bytes)
+{
+   GLint halfWidth= width / 2;
+   GLint halfHeight= height / 2;
+   const char *src= (const char *) dataIn;
+   GLshort *dest= dataOut;
+   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 1x1 */
+      halfHeight= 1;
+
+      for (jj= 0; jj< halfWidth; jj++) {
+	 int kk;
+	 for (kk= 0; kk< components; kk++) {
+#define BOX2 2
+	    GLshort sshort[BOX2];
+	    if (myswap_bytes) {
+	       sshort[0]= __GLU_SWAP_2_BYTES(src);
+	       sshort[1]= __GLU_SWAP_2_BYTES(src+group_size);
+	    }
+	    else {
+	       sshort[0]= *(const GLshort*)src;
+	       sshort[1]= *(const GLshort*)(src+group_size);
+	    }
+
+	    *dest= (sshort[0] + sshort[1]) / 2;
+	    src+= element_size;
+	    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);	/* widthxheight can't be 1x1 */
+      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++) {
+#define BOX2 2
+	    GLshort sshort[BOX2];
+	    if (myswap_bytes) {
+	       sshort[0]= __GLU_SWAP_2_BYTES(src);
+	       sshort[1]= __GLU_SWAP_2_BYTES(src+ysize);
+	    }
+	    else {
+	       sshort[0]= *(const GLshort*)src;
+	       sshort[1]= *(const GLshort*)(src+ysize);
+	    }
+	    *dest= (sshort[0] + sshort[1]) / 2;
+
+	    src+= element_size;
+	    dest++;
+	 }  
+	 src+= padBytes; /* add pad bytes, if any, to get to end to row */
+	 src+= ysize;
+      }
+
+      assert(src == &((const char *)dataIn)[ysize*height]);
+   }
+
+   assert((char *)dest == &((char *)dataOut)
+	  [components * element_size * halfWidth * halfHeight]);
+
+} /* halve1Dimage_short() */
+
+
+static void halveImage_uint(GLint components, GLuint width, GLuint height, 
+		        const GLuint *datain, GLuint *dataout,
+			GLint element_size, GLint ysize, GLint group_size,
+			GLint myswap_bytes)
+{
+    int i, j, k, l;
+    int newwidth, newheight;
+    GLuint *s;
+    const char *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_uint(components,width,height,datain,dataout,
+			 element_size,ysize,group_size, myswap_bytes);
+       return;
+    }
+
+    newwidth = width / 2;
+    newheight = height / 2;
+    s = dataout;
+    t = (const char *)datain;
+
+    /* Piece o' cake! */
+    if (!myswap_bytes) 
+    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 */
+		s[0] = ((double)*(const GLuint*)t + 
+			(double)*(const GLuint*)(t+group_size) + 
+		        (double)*(const GLuint*)(t+ysize) + 
+		        (double)*(const GLuint*)(t+ysize+group_size))/4 + 0.5;
+		s++; 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 */
+		GLdouble buf;
+                buf = (GLdouble)__GLU_SWAP_4_BYTES(t) +
+                      (GLdouble)__GLU_SWAP_4_BYTES(t+group_size) +
+                      (GLdouble)__GLU_SWAP_4_BYTES(t+ysize) +
+                      (GLdouble)__GLU_SWAP_4_BYTES(t+ysize+group_size);
+                s[0] = (GLuint)(buf/4 + 0.5);
+
+		s++; t += element_size;
+	    }
+	    t += group_size;
+        }
+        t += ysize;
+    }
+}
+
+/* */
+static void halve1Dimage_uint(GLint components, GLuint width, GLuint height, 
+			      const GLuint *dataIn, GLuint *dataOut, 
+			      GLint element_size, GLint ysize, 
+			      GLint group_size, GLint myswap_bytes)
+{
+   GLint halfWidth= width / 2;
+   GLint halfHeight= height / 2;
+   const char *src= (const char *) dataIn;
+   GLuint *dest= dataOut;
+   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 1x1 */
+      halfHeight= 1;
+
+      for (jj= 0; jj< halfWidth; jj++) {
+	 int kk;
+	 for (kk= 0; kk< components; kk++) {
+#define BOX2 2
+	    GLuint uint[BOX2];
+	    if (myswap_bytes) {
+	       uint[0]= __GLU_SWAP_4_BYTES(src);
+	       uint[1]= __GLU_SWAP_4_BYTES(src+group_size);
+	    }
+	    else {
+	       uint[0]= *(const GLuint*)src;
+	       uint[1]= *(const GLuint*)(src+group_size);
+	    }
+	    *dest= ((double)uint[0]+(double)uint[1])/2.0;   
+
+	    src+= element_size;
+	    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);	/* widthxheight can't be 1x1 */
+      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++) {
+#define BOX2 2
+	    GLuint uint[BOX2];
+	    if (myswap_bytes) {
+	       uint[0]= __GLU_SWAP_4_BYTES(src);
+	       uint[1]= __GLU_SWAP_4_BYTES(src+ysize);
+	    }
+	    else {
+	       uint[0]= *(const GLuint*)src;
+	       uint[1]= *(const GLuint*)(src+ysize);
+	    }
+	    *dest= ((double)uint[0]+(double)uint[1])/2.0;
+
+	    src+= element_size;
+	    dest++;
+	 }  
+	 src+= padBytes; /* add pad bytes, if any, to get to end to row */
+	 src+= ysize;
+      }
+
+      assert(src == &((const char *)dataIn)[ysize*height]);
+   }
+
+   assert((char *)dest == &((char *)dataOut)
+	  [components * element_size * halfWidth * halfHeight]);
+
+} /* halve1Dimage_uint() */
+
+static void halveImage_int(GLint components, GLuint width, GLuint height, 
+		        const GLint *datain, GLint *dataout, GLint element_size,
+			GLint ysize, GLint group_size, GLint myswap_bytes)
+{
+    int i, j, k, l;
+    int newwidth, newheight;
+    GLint *s;
+    const char *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_int(components,width,height,datain,dataout,
+			element_size,ysize,group_size, myswap_bytes);
+       return;
+    }
+
+    newwidth = width / 2;
+    newheight = height / 2;
+    s = dataout;
+    t = (const char *)datain;
+
+    /* Piece o' cake! */
+    if (!myswap_bytes) 
+    for (i = 0; i < newheight; i++) {
+	for (j = 0; j < newwidth; j++) {
+	    for (k = 0; k < components; k++) {
+		s[0] = ((float)*(const GLint*)t + 
+			(float)*(const GLint*)(t+group_size) + 
+			(float)*(const GLint*)(t+ysize) + 
+			(float)*(const GLint*)(t+ysize+group_size))/4 + 0.5;
+		s++; 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++) {
+		GLuint b;
+                GLfloat buf;
+                b = __GLU_SWAP_4_BYTES(t);
+                buf = *(GLint*)&b;
+                b = __GLU_SWAP_4_BYTES(t+group_size);
+                buf += *(GLint*)&b;
+                b = __GLU_SWAP_4_BYTES(t+ysize);
+                buf += *(GLint*)&b;
+                b = __GLU_SWAP_4_BYTES(t+ysize+group_size);
+                buf += *(GLint*)&b;
+                s[0] = (GLint)(buf/4 + 0.5);
+
+                s++; t += element_size;
+	    }
+	    t += group_size;
+        }
+        t += ysize;
+    }
+}
+
+/* */
+static void halve1Dimage_int(GLint components, GLuint width, GLuint height, 
+			     const GLint *dataIn, GLint *dataOut, 
+			     GLint element_size, GLint ysize, 
+			     GLint group_size, GLint myswap_bytes)
+{
+   GLint halfWidth= width / 2;
+   GLint halfHeight= height / 2;
+   const char *src= (const char *) dataIn;
+   GLint *dest= dataOut;
+   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 1x1 */
+      halfHeight= 1;
+
+      for (jj= 0; jj< halfWidth; jj++) {
+	 int kk;
+	 for (kk= 0; kk< components; kk++) {
+#define BOX2 2
+	    GLuint uint[BOX2];
+	    if (myswap_bytes) {
+	       uint[0]= __GLU_SWAP_4_BYTES(src);
+	       uint[1]= __GLU_SWAP_4_BYTES(src+group_size);
+	    }
+	    else {
+	       uint[0]= *(const GLuint*)src;
+	       uint[1]= *(const GLuint*)(src+group_size);
+	    }
+	    *dest= ((float)uint[0]+(float)uint[1])/2.0;
+
+	    src+= element_size;
+	    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);	/* widthxheight can't be 1x1 */
+      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++) {
+#define BOX2 2
+	    GLuint uint[BOX2];
+	    if (myswap_bytes) {
+	       uint[0]= __GLU_SWAP_4_BYTES(src);
+	       uint[1]= __GLU_SWAP_4_BYTES(src+ysize);
+	    }
+	    else {
+	       uint[0]= *(const GLuint*)src;
+	       uint[1]= *(const GLuint*)(src+ysize);
+	    }
+	    *dest= ((float)uint[0]+(float)uint[1])/2.0;
+
+	    src+= element_size;
+	    dest++;
+	 }  
+	 src+= padBytes; /* add pad bytes, if any, to get to end to row */
+	 src+= ysize;
+      }
+
+      assert(src == &((const char *)dataIn)[ysize*height]);
+   }
+
+   assert((char *)dest == &((char *)dataOut)
+	  [components * element_size * halfWidth * halfHeight]);
+
+} /* halve1Dimage_int() */
+
+
+static void halveImage_float(GLint components, GLuint width, GLuint height, 
+		        const GLfloat *datain, GLfloat *dataout,
+			GLint element_size, GLint ysize, GLint group_size,
+			GLint myswap_bytes)
+{
+    int i, j, k, l;
+    int newwidth, newheight;
+    GLfloat *s;
+    const char *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_float(components,width,height,datain,dataout,
+			  element_size,ysize,group_size, myswap_bytes);
+       return;
+    }
+
+    newwidth = width / 2;
+    newheight = height / 2;
+    s = dataout;
+    t = (const char *)datain;
+
+    /* Piece o' cake! */
+    if (!myswap_bytes)
+    for (i = 0; i < newheight; i++) {
+	for (j = 0; j < newwidth; j++) {
+	    for (k = 0; k < components; k++) {
+		s[0] = (*(const GLfloat*)t + 
+			*(const GLfloat*)(t+group_size) + 
+			*(const GLfloat*)(t+ysize) + 
+			*(const GLfloat*)(t+ysize+group_size)) / 4;
+		s++; 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++) {
+		GLuint b;
+                b = __GLU_SWAP_4_BYTES(t);
+                s[0] = *(GLfloat*)&b;
+                b = __GLU_SWAP_4_BYTES(t+group_size);
+                s[0] += *(GLfloat*)&b;
+                b = __GLU_SWAP_4_BYTES(t+ysize);
+                s[0] += *(GLfloat*)&b;
+                b = __GLU_SWAP_4_BYTES(t+ysize+group_size);
+                s[0] += *(GLfloat*)&b;
+		s[0] /= 4;
+                s++; t += element_size;
+	    }
+	    t += group_size;
+        }
+        t += ysize;
+    }
+}
+
+/* */
+static void halve1Dimage_float(GLint components, GLuint width, GLuint height, 
+			       const GLfloat *dataIn, GLfloat *dataOut, 
+			       GLint element_size, GLint ysize, 
+			       GLint group_size, GLint myswap_bytes)
+{
+   GLint halfWidth= width / 2;
+   GLint halfHeight= height / 2;
+   const char *src= (const char *) dataIn;
+   GLfloat *dest= dataOut; 
+   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 1x1 */
+      halfHeight= 1;
+
+      for (jj= 0; jj< halfWidth; jj++) {
+	 int kk;
+	 for (kk= 0; kk< components; kk++) {
+#define BOX2 2
+	    GLfloat sfloat[BOX2];
+	    if (myswap_bytes) {
+	       sfloat[0]= __GLU_SWAP_4_BYTES(src);
+	       sfloat[1]= __GLU_SWAP_4_BYTES(src+group_size);
+	    }
+	    else {
+	       sfloat[0]= *(const GLfloat*)src;
+	       sfloat[1]= *(const GLfloat*)(src+group_size);
+	    }
+
+	    *dest= (sfloat[0] + sfloat[1]) / 2.0;
+	    src+= element_size;
+	    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);	/* widthxheight can't be 1x1 */
+      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++) {
+#define BOX2 2
+	    GLfloat sfloat[BOX2];
+	    if (myswap_bytes) {
+	       sfloat[0]= __GLU_SWAP_4_BYTES(src);
+	       sfloat[1]= __GLU_SWAP_4_BYTES(src+ysize);
+	    }
+	    else {
+	       sfloat[0]= *(const GLfloat*)src;
+	       sfloat[1]= *(const GLfloat*)(src+ysize);
+	    }
+	    *dest= (sfloat[0] + sfloat[1]) / 2.0;
+
+	    src+= element_size;
+	    dest++;
+	 }  
+	 src+= padBytes; /* add pad bytes, if any, to get to end to row */
+	 src+= ysize;		/* skip to odd row */
+      }
+   }
+
+   assert(src == &((const char *)dataIn)[ysize*height]);
+   assert((char *)dest == &((char *)dataOut)
+	  [components * element_size * halfWidth * halfHeight]);
+} /* halve1Dimage_float() */
+
+static void scale_internal(GLint components, GLint widthin, GLint heightin, 
+			   const GLushort *datain, 
+			   GLint widthout, GLint heightout, 
+			   GLushort *dataout)
+{
+    float x, lowx, highx, convx, halfconvx;
+    float y, lowy, highy, convy, halfconvy;
+    float xpercent,ypercent;
+    float percent;
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float area;
+    int i,j,k,yint,xint,xindex,yindex;
+    int temp;
+
+    if (widthin == widthout*2 && heightin == heightout*2) {
+	halveImage(components, widthin, heightin, datain, dataout);
+	return;
+    }
+    convy = (float) heightin/heightout;
+    convx = (float) widthin/widthout;
+    halfconvx = convx/2;
+    halfconvy = convy/2;
+    for (i = 0; i < heightout; i++) {
+	y = convy * (i+0.5);
+	if (heightin > heightout) {
+	    highy = y + halfconvy;
+	    lowy = y - halfconvy;
+	} else {
+	    highy = y + 0.5;
+	    lowy = y - 0.5;
+	}
+	for (j = 0; j < widthout; j++) {
+	    x = convx * (j+0.5);
+	    if (widthin > widthout) {
+		highx = x + halfconvx;
+		lowx = x - halfconvx;
+	    } else {
+		highx = x + 0.5;
+		lowx = x - 0.5;
+	    }
+
+	    /*
+	    ** Ok, now apply box filter to box that goes from (lowx, lowy)
+	    ** to (highx, highy) on input data into this pixel on output
+	    ** data.
+	    */
+	    totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+	    area = 0.0;
+
+	    y = lowy;
+	    yint = floor(y);
+	    while (y < highy) {
+		yindex = (yint + heightin) % heightin;
+		if (highy < yint+1) {
+		    ypercent = highy - y;
+		} else {
+		    ypercent = yint+1 - y;
+		}
+
+		x = lowx;
+		xint = floor(x);
+
+		while (x < highx) {
+		    xindex = (xint + widthin) % widthin;
+		    if (highx < xint+1) {
+			xpercent = highx - x;
+		    } else {
+			xpercent = xint+1 - x;
+		    }
+
+		    percent = xpercent * ypercent;
+		    area += percent;
+		    temp = (xindex + (yindex * widthin)) * components;
+		    for (k = 0; k < components; k++) {
+			totals[k] += datain[temp + k] * percent;
+		    }
+
+		    xint++;
+		    x = xint;
+		}
+		yint++;
+		y = yint;
+	    }
+
+	    temp = (j + (i * widthout)) * components;
+	    for (k = 0; k < components; k++) {
+		/* totals[] should be rounded in the case of enlarging an RGB
+		 * ramp when the type is 332 or 4444
+		 */
+		dataout[temp + k] = (totals[k]+0.5)/area;
+	    }
+	}
+    }
+}
+
+static void scale_internal_ubyte(GLint components, GLint widthin, 
+		   	   GLint heightin, const GLubyte *datain, 
+			   GLint widthout, GLint heightout, 
+			   GLubyte *dataout, GLint element_size,
+			   GLint ysize, GLint group_size)
+{
+    float x, convx;
+    float y, convy;
+    float percent;
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float area;
+    int i,j,k,xindex;
+
+    const char *temp, *temp0;
+    const char *temp_index;
+    int outindex;
+
+    int lowx_int, highx_int, lowy_int, highy_int;
+    float x_percent, y_percent;
+    float lowx_float, highx_float, lowy_float, highy_float;
+    float convy_float, convx_float;
+    int convy_int, convx_int;
+    int l, m;
+    const char *left, *right;
+
+    if (widthin == widthout*2 && heightin == heightout*2) {
+	halveImage_ubyte(components, widthin, heightin, 
+	(const GLubyte *)datain, (GLubyte *)dataout, 
+	element_size, ysize, group_size);
+	return;
+    }
+    convy = (float) heightin/heightout;
+    convx = (float) widthin/widthout;
+    convy_int = floor(convy);
+    convy_float = convy - convy_int;
+    convx_int = floor(convx);
+    convx_float = convx - convx_int;
+   
+    area = convx * convy;
+
+    lowy_int = 0;
+    lowy_float = 0;
+    highy_int = convy_int;
+    highy_float = convy_float;
+
+    for (i = 0; i < heightout; i++) {
+	lowx_int = 0;
+	lowx_float = 0;
+	highx_int = convx_int;
+	highx_float = convx_float;
+
+	for (j = 0; j < widthout; j++) {
+
+	    /*
+	    ** Ok, now apply box filter to box that goes from (lowx, lowy)
+	    ** to (highx, highy) on input data into this pixel on output
+	    ** data.
+	    */
+	    totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+
+	    /* calculate the value for pixels in the 1st row */
+	    xindex = lowx_int*group_size;
+	    if((highy_int>lowy_int) && (highx_int>lowx_int)) {
+
+		y_percent = 1-lowy_float;
+	    	temp = (const char *)datain + xindex + lowy_int * ysize;
+		percent = y_percent * (1-lowx_float);
+	      	for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+			totals[k] += (GLubyte)(*(temp_index)) * percent;
+	        }
+		left = temp;
+	    	for(l = lowx_int+1; l < highx_int; l++) {
+		    temp += group_size;
+		    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * y_percent;
+		    }
+	        }
+		temp += group_size;
+		right = temp;
+		percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * percent;
+                }
+
+                /* calculate the value for pixels in the last row */		
+		y_percent = highy_float;
+		percent = y_percent * (1-lowx_float);
+		temp = (const char *)datain + xindex + highy_int * ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * percent;
+                }
+		for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * y_percent;
+                    }
+                }
+                temp += group_size;
+		percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * percent;
+                }
+
+
+                /* calculate the value for pixels in the 1st and last column */
+		for(m = lowy_int+1; m < highy_int; m++) {
+		    left += ysize;
+		    right += ysize;
+                    for (k = 0; k < components; 
+		         k++, left += element_size, right += element_size) {
+                        totals[k] += (GLubyte)(*(left))*(1-lowx_float)
+				+(GLubyte)(*(right))*highx_float;
+		    }
+		}
+	    } else if (highy_int > lowy_int) {
+		x_percent = highx_float - lowx_float;
+		percent = (1-lowy_float)*x_percent;
+		temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * percent;
+	        }
+		for(m = lowy_int+1; m < highy_int; m++) {
+		    temp += ysize;
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * x_percent;
+		    }
+		}
+		percent = x_percent * highy_float;
+		temp += ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * percent;
+                }
+	    } else if (highx_int > lowx_int) {
+		y_percent = highy_float - lowy_float;
+		percent = (1-lowx_float)*y_percent;
+		temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * percent;
+                }
+		for (l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * y_percent;
+		    }
+		}
+		temp += group_size;
+		percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * percent;
+		}
+	    } else {
+		percent = (highy_float-lowy_float)*(highx_float-lowx_float);
+		temp = (const char *)datain + xindex + lowy_int * ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index)) * percent;
+                }
+	    }
+
+
+
+            /* this is for the pixels in the body */
+	    temp0 = (const char *)datain + xindex + group_size +
+		 (lowy_int+1)*ysize;
+	    for (m = lowy_int+1; m < highy_int; m++) {
+		temp = temp0;
+		for(l = lowx_int+1; l < highx_int; l++) {
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        totals[k] += (GLubyte)(*(temp_index));
+                    }
+                    temp += group_size;
+                }
+	    	temp0 += ysize;
+	    }
+
+	    outindex = (j + (i * widthout)) * components;
+	    for (k = 0; k < components; k++) {
+		dataout[outindex + k] = totals[k]/area;
+		/*printf("totals[%d] = %f\n", k, totals[k]);*/
+	    }
+	    lowx_int = highx_int;
+	    lowx_float = highx_float;
+	    highx_int += convx_int;
+ 	    highx_float += convx_float;
+	    if(highx_float > 1) {
+		highx_float -= 1.0;
+		highx_int++;
+	    }
+	}
+	lowy_int = highy_int;
+	lowy_float = highy_float;
+	highy_int += convy_int;
+	highy_float += convy_float;
+	if(highy_float > 1) {
+	    highy_float -= 1.0;
+	    highy_int++;
+	}
+    }
+}
+
+static void scale_internal_byte(GLint components, GLint widthin, 
+		   	   GLint heightin, const GLbyte *datain, 
+			   GLint widthout, GLint heightout, 
+			   GLbyte *dataout, GLint element_size,
+			   GLint ysize, GLint group_size)
+{
+    float x, convx;
+    float y, convy;
+    float percent;
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float area;
+    int i,j,k,xindex;
+
+    const char *temp, *temp0;
+    const char *temp_index;
+    int outindex;
+
+    int lowx_int, highx_int, lowy_int, highy_int;
+    float x_percent, y_percent;
+    float lowx_float, highx_float, lowy_float, highy_float;
+    float convy_float, convx_float;
+    int convy_int, convx_int;
+    int l, m;
+    const char *left, *right;
+
+    if (widthin == widthout*2 && heightin == heightout*2) {
+	halveImage_byte(components, widthin, heightin, 
+	(const GLbyte *)datain, (GLbyte *)dataout, 
+	element_size, ysize, group_size);
+	return;
+    }
+    convy = (float) heightin/heightout;
+    convx = (float) widthin/widthout;
+    convy_int = floor(convy);
+    convy_float = convy - convy_int;
+    convx_int = floor(convx);
+    convx_float = convx - convx_int;
+   
+    area = convx * convy;
+
+    lowy_int = 0;
+    lowy_float = 0;
+    highy_int = convy_int;
+    highy_float = convy_float;
+
+    for (i = 0; i < heightout; i++) {
+	lowx_int = 0;
+	lowx_float = 0;
+	highx_int = convx_int;
+	highx_float = convx_float;
+
+	for (j = 0; j < widthout; j++) {
+
+	    /*
+	    ** Ok, now apply box filter to box that goes from (lowx, lowy)
+	    ** to (highx, highy) on input data into this pixel on output
+	    ** data.
+	    */
+	    totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+
+            /* calculate the value for pixels in the 1st row */
+	    xindex = lowx_int*group_size;
+	    if((highy_int>lowy_int) && (highx_int>lowx_int)) {
+
+		y_percent = 1-lowy_float;
+	    	temp = (const char *)datain + xindex + lowy_int * ysize;
+		percent = y_percent * (1-lowx_float);
+	      	for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+			totals[k] += (GLbyte)(*(temp_index)) * percent;
+	        }
+		left = temp;
+	    	for(l = lowx_int+1; l < highx_int; l++) {
+		    temp += group_size;
+		    for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * y_percent;
+		    }
+	        }
+		temp += group_size;
+		right = temp;
+		percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * percent;
+                }
+
+                /* calculate the value for pixels in the last row */		
+		y_percent = highy_float;
+		percent = y_percent * (1-lowx_float);
+		temp = (const char *)datain + xindex + highy_int * ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * percent;
+                }
+		for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * y_percent;
+                    }
+                }
+                temp += group_size;
+		percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * percent;
+                }
+
+
+                /* calculate the value for pixels in the 1st and last column */
+		for(m = lowy_int+1; m < highy_int; m++) {
+		    left += ysize;
+		    right += ysize;
+                    for (k = 0; k < components; 
+		         k++, left += element_size, right += element_size) {
+                        totals[k] += (GLbyte)(*(left))*(1-lowx_float)
+				+(GLbyte)(*(right))*highx_float;
+		    }
+		}
+	    } else if (highy_int > lowy_int) {
+		x_percent = highx_float - lowx_float;
+		percent = (1-lowy_float)*x_percent;
+		temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * percent;
+	        }
+		for(m = lowy_int+1; m < highy_int; m++) {
+		    temp += ysize;
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * x_percent;
+		    }
+		}
+		percent = x_percent * highy_float;
+		temp += ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * percent;
+                }
+	    } else if (highx_int > lowx_int) {
+		y_percent = highy_float - lowy_float;
+		percent = (1-lowx_float)*y_percent;
+		temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * percent;
+                }
+		for (l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * y_percent;
+		    }
+		}
+		temp += group_size;
+		percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * percent;
+		}
+	    } else {
+		percent = (highy_float-lowy_float)*(highx_float-lowx_float);
+		temp = (const char *)datain + xindex + lowy_int * ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index)) * percent;
+                }
+	    }
+
+
+
+            /* this is for the pixels in the body */
+	    temp0 = (const char *)datain + xindex + group_size + 
+		(lowy_int+1)*ysize;
+	    for (m = lowy_int+1; m < highy_int; m++) {
+		temp = temp0;
+		for(l = lowx_int+1; l < highx_int; l++) {
+                    for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                        totals[k] += (GLbyte)(*(temp_index));
+                    }
+                    temp += group_size;
+                }
+	    	temp0 += ysize;
+	    }
+
+	    outindex = (j + (i * widthout)) * components;
+	    for (k = 0; k < components; k++) {
+		dataout[outindex + k] = totals[k]/area;
+		/*printf("totals[%d] = %f\n", k, totals[k]);*/
+	    }
+	    lowx_int = highx_int;
+	    lowx_float = highx_float;
+	    highx_int += convx_int;
+ 	    highx_float += convx_float;
+	    if(highx_float > 1) {
+		highx_float -= 1.0;
+		highx_int++;
+	    }
+	}
+	lowy_int = highy_int;
+	lowy_float = highy_float;
+	highy_int += convy_int;
+	highy_float += convy_float;
+	if(highy_float > 1) {
+	    highy_float -= 1.0;
+	    highy_int++;
+	}
+    }
+}
+
+static void scale_internal_ushort(GLint components, GLint widthin, 
+		   	   GLint heightin, const GLushort *datain, 
+			   GLint widthout, GLint heightout, 
+			   GLushort *dataout, GLint element_size,
+			   GLint ysize, GLint group_size,
+			   GLint myswap_bytes)
+{
+    float x, convx;
+    float y, convy;
+    float percent;
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float area;
+    int i,j,k,xindex;
+
+    const char *temp, *temp0;
+    const char *temp_index;
+    int outindex;
+
+    int lowx_int, highx_int, lowy_int, highy_int;
+    float x_percent, y_percent;
+    float lowx_float, highx_float, lowy_float, highy_float;
+    float convy_float, convx_float;
+    int convy_int, convx_int;
+    int l, m;
+    const char *left, *right;
+
+    if (widthin == widthout*2 && heightin == heightout*2) {
+	halveImage_ushort(components, widthin, heightin, 
+	(const GLushort *)datain, (GLushort *)dataout, 
+	element_size, ysize, group_size, myswap_bytes);
+	return;
+    }
+    convy = (float) heightin/heightout;
+    convx = (float) widthin/widthout;
+    convy_int = floor(convy);
+    convy_float = convy - convy_int;
+    convx_int = floor(convx);
+    convx_float = convx - convx_int;
+   
+    area = convx * convy;
+
+    lowy_int = 0;
+    lowy_float = 0;
+    highy_int = convy_int;
+    highy_float = convy_float;
+
+    for (i = 0; i < heightout; i++) {
+	lowx_int = 0;
+	lowx_float = 0;
+	highx_int = convx_int;
+	highx_float = convx_float;
+
+	for (j = 0; j < widthout; j++) {
+	    /*
+	    ** Ok, now apply box filter to box that goes from (lowx, lowy)
+	    ** to (highx, highy) on input data into this pixel on output
+	    ** data.
+	    */
+	    totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+
+	    /* calculate the value for pixels in the 1st row */
+	    xindex = lowx_int*group_size;
+	    if((highy_int>lowy_int) && (highx_int>lowx_int)) {
+
+		y_percent = 1-lowy_float;
+	    	temp = (const char *)datain + xindex + lowy_int * ysize;
+		percent = y_percent * (1-lowx_float);
+	      	for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+		    if (myswap_bytes) {
+			totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+		    } else {
+		        totals[k] += *(const GLushort*)temp_index * percent;
+		    }
+	        }
+		left = temp;
+	    	for(l = lowx_int+1; l < highx_int; l++) {
+		    temp += group_size;
+		    for (k = 0, temp_index = temp; k < components; 
+			 k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+                                 __GLU_SWAP_2_BYTES(temp_index) * y_percent;
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index * y_percent;
+                        }
+		    }
+	        }
+		temp += group_size;
+		right = temp;
+		percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+
+		/* calculate the value for pixels in the last row */		
+		y_percent = highy_float;
+		percent = y_percent * (1-lowx_float);
+		temp = (const char *)datain + xindex + highy_int * ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+		for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components; 
+			 k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+                                 __GLU_SWAP_2_BYTES(temp_index) * y_percent;
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+		percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+
+		/* calculate the value for pixels in the 1st and last column */
+		for(m = lowy_int+1; m < highy_int; m++) {
+		    left += ysize;
+		    right += ysize;
+                    for (k = 0; k < components; 
+		         k++, left += element_size, right += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+		 	        __GLU_SWAP_2_BYTES(left) * (1-lowx_float) +
+			        __GLU_SWAP_2_BYTES(right) * highx_float;
+                        } else {
+                            totals[k] += *(const GLushort*)left * (1-lowx_float)
+                                       + *(const GLushort*)right * highx_float;
+                        }
+		    }
+		}
+	    } else if (highy_int > lowy_int) {
+		x_percent = highx_float - lowx_float;
+		percent = (1-lowy_float)*x_percent;
+		temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+	        }
+		for(m = lowy_int+1; m < highy_int; m++) {
+		    temp += ysize;
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+				__GLU_SWAP_2_BYTES(temp_index) * x_percent;
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index * x_percent;
+                        }
+		    }
+		}
+		percent = x_percent * highy_float;
+		temp += ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+	    } else if (highx_int > lowx_int) {
+		y_percent = highy_float - lowy_float;
+		percent = (1-lowx_float)*y_percent;
+		temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+		for (l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+			        __GLU_SWAP_2_BYTES(temp_index) * y_percent;
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index * y_percent;
+                        }
+		    }
+		}
+		temp += group_size;
+		percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+		}
+	    } else {
+		percent = (highy_float-lowy_float)*(highx_float-lowx_float);
+		temp = (const char *)datain + xindex + lowy_int * ysize;
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+	    }
+
+	    /* this is for the pixels in the body */
+	    temp0 = (const char *)datain + xindex + group_size +
+		 (lowy_int+1)*ysize;
+	    for (m = lowy_int+1; m < highy_int; m++) {
+		temp = temp0;
+		for(l = lowx_int+1; l < highx_int; l++) {
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += __GLU_SWAP_2_BYTES(temp_index);
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index;
+                        }
+                    }
+                    temp += group_size;
+                }
+	    	temp0 += ysize;
+	    }
+
+	    outindex = (j + (i * widthout)) * components;
+	    for (k = 0; k < components; k++) {
+		dataout[outindex + k] = totals[k]/area;
+		/*printf("totals[%d] = %f\n", k, totals[k]);*/
+	    }
+	    lowx_int = highx_int;
+	    lowx_float = highx_float;
+	    highx_int += convx_int;
+ 	    highx_float += convx_float;
+	    if(highx_float > 1) {
+		highx_float -= 1.0;
+		highx_int++;
+	    }
+	}
+	lowy_int = highy_int;
+	lowy_float = highy_float;
+	highy_int += convy_int;
+	highy_float += convy_float;
+	if(highy_float > 1) {
+	    highy_float -= 1.0;
+	    highy_int++;
+	}
+    }
+}
+
+static void scale_internal_short(GLint components, GLint widthin,
+                           GLint heightin, const GLshort *datain,
+                           GLint widthout, GLint heightout,
+                           GLshort *dataout, GLint element_size,
+                           GLint ysize, GLint group_size,
+                           GLint myswap_bytes)
+{
+    float x, convx;
+    float y, convy;
+    float percent;
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float area;
+    int i,j,k,xindex;
+
+    const char *temp, *temp0;
+    const char *temp_index;
+    int outindex;
+
+    int lowx_int, highx_int, lowy_int, highy_int;
+    float x_percent, y_percent;
+    float lowx_float, highx_float, lowy_float, highy_float;
+    float convy_float, convx_float;
+    int convy_int, convx_int;
+    int l, m;
+    const char *left, *right;
+
+    GLushort swapbuf;	/* unsigned buffer */
+
+    if (widthin == widthout*2 && heightin == heightout*2) {
+        halveImage_short(components, widthin, heightin,
+        (const GLshort *)datain, (GLshort *)dataout,
+        element_size, ysize, group_size, myswap_bytes);
+        return;
+    }
+    convy = (float) heightin/heightout;
+    convx = (float) widthin/widthout;
+    convy_int = floor(convy);
+    convy_float = convy - convy_int;
+    convx_int = floor(convx);
+    convx_float = convx - convx_int;
+
+    area = convx * convy;
+
+    lowy_int = 0;
+    lowy_float = 0;
+    highy_int = convy_int;
+    highy_float = convy_float;
+
+    for (i = 0; i < heightout; i++) {
+        lowx_int = 0;
+        lowx_float = 0;
+        highx_int = convx_int;
+        highx_float = convx_float;
+
+        for (j = 0; j < widthout; j++) {
+            /*
+            ** Ok, now apply box filter to box that goes from (lowx, lowy)
+            ** to (highx, highy) on input data into this pixel on output
+            ** data.
+            */
+            totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+
+            /* calculate the value for pixels in the 1st row */
+            xindex = lowx_int*group_size;
+            if((highy_int>lowy_int) && (highx_int>lowx_int)) {
+
+                y_percent = 1-lowy_float;
+                temp = (const char *)datain + xindex + lowy_int * ysize;
+                percent = y_percent * (1-lowx_float);
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                        totals[k] += *(const GLshort*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLshort*)temp_index * percent;
+                    }
+                }
+                left = temp;
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                            totals[k] += *(const GLshort*)&swapbuf * y_percent;
+                        } else {
+                            totals[k] += *(const GLshort*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                right = temp;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                        totals[k] += *(const GLshort*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLshort*)temp_index * percent;
+                    }
+                }
+
+                /* calculate the value for pixels in the last row */
+                y_percent = highy_float;
+                percent = y_percent * (1-lowx_float);
+                temp = (const char *)datain + xindex + highy_int * ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                        totals[k] += *(const GLshort*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLshort*)temp_index * percent;
+                    }
+                }
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                            totals[k] += *(const GLshort*)&swapbuf * y_percent;
+                        } else {
+                            totals[k] += *(const GLshort*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                        totals[k] += *(const GLshort*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLshort*)temp_index * percent;
+                    }
+                }
+
+                /* calculate the value for pixels in the 1st and last column */
+                for(m = lowy_int+1; m < highy_int; m++) {
+                    left += ysize;
+                    right += ysize;
+                    for (k = 0; k < components;
+                         k++, left += element_size, right += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_2_BYTES(left);
+                            totals[k] += *(const GLshort*)&swapbuf * (1-lowx_float);
+			    swapbuf = __GLU_SWAP_2_BYTES(right);
+			    totals[k] += *(const GLshort*)&swapbuf * highx_float;
+                        } else {
+                            totals[k] += *(const GLshort*)left * (1-lowx_float)
+                                       + *(const GLshort*)right * highx_float;
+                        }
+                    }
+                }
+            } else if (highy_int > lowy_int) {
+                x_percent = highx_float - lowx_float;
+                percent = (1-lowy_float)*x_percent;
+                temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                        totals[k] += *(const GLshort*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLshort*)temp_index * percent;
+                    }
+                }
+                for(m = lowy_int+1; m < highy_int; m++) {
+                    temp += ysize;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                            totals[k] += *(const GLshort*)&swapbuf * x_percent;
+                        } else {
+                            totals[k] += *(const GLshort*)temp_index * x_percent;
+                        }
+                    }
+                }
+                percent = x_percent * highy_float;
+                temp += ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                        totals[k] += *(const GLshort*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLshort*)temp_index * percent;
+                    }
+                }
+            } else if (highx_int > lowx_int) {
+                y_percent = highy_float - lowy_float;
+                percent = (1-lowx_float)*y_percent;
+   
+             temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                        totals[k] += *(const GLshort*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLshort*)temp_index * percent;
+                    }
+                }
+                for (l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                            totals[k] += *(const GLshort*)&swapbuf * y_percent;
+                        } else {
+                            totals[k] += *(const GLshort*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                        totals[k] += *(const GLshort*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLshort*)temp_index * percent;
+                    }
+                }
+            } else {
+                percent = (highy_float-lowy_float)*(highx_float-lowx_float);
+                temp = (const char *)datain + xindex + lowy_int * ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                        totals[k] += *(const GLshort*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLshort*)temp_index * percent;
+                    }
+                }
+            }
+
+            /* this is for the pixels in the body */
+            temp0 = (const char *)datain + xindex + group_size +
+		 (lowy_int+1)*ysize;
+            for (m = lowy_int+1; m < highy_int; m++) {
+                temp = temp0;
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_2_BYTES(temp_index);
+                            totals[k] += *(const GLshort*)&swapbuf; 
+                        } else {
+                            totals[k] += *(const GLshort*)temp_index;
+                        }
+                    }
+                    temp += group_size;
+                }
+                temp0 += ysize;
+            }
+
+            outindex = (j + (i * widthout)) * components;
+            for (k = 0; k < components; k++) {
+                dataout[outindex + k] = totals[k]/area;
+                /*printf("totals[%d] = %f\n", k, totals[k]);*/
+            }
+            lowx_int = highx_int;
+            lowx_float = highx_float;
+            highx_int += convx_int;
+            highx_float += convx_float;
+            if(highx_float > 1) {
+                highx_float -= 1.0;
+                highx_int++;
+            }
+        }
+        lowy_int = highy_int;
+        lowy_float = highy_float;
+        highy_int += convy_int;
+        highy_float += convy_float;
+        if(highy_float > 1) {
+            highy_float -= 1.0;
+            highy_int++;
+        }
+    }
+}
+
+static void scale_internal_uint(GLint components, GLint widthin,
+                           GLint heightin, const GLuint *datain,
+                           GLint widthout, GLint heightout,
+                           GLuint *dataout, GLint element_size,
+                           GLint ysize, GLint group_size,
+                           GLint myswap_bytes)
+{
+    float x, convx;
+    float y, convy;
+    float percent;
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float area;
+    int i,j,k,xindex;
+
+    const char *temp, *temp0;
+    const char *temp_index;
+    int outindex;
+
+    int lowx_int, highx_int, lowy_int, highy_int;
+    float x_percent, y_percent;
+    float lowx_float, highx_float, lowy_float, highy_float;
+    float convy_float, convx_float;
+    int convy_int, convx_int;
+    int l, m;
+    const char *left, *right;
+
+    if (widthin == widthout*2 && heightin == heightout*2) {
+        halveImage_uint(components, widthin, heightin,
+        (const GLuint *)datain, (GLuint *)dataout,
+        element_size, ysize, group_size, myswap_bytes);
+        return;
+    }
+    convy = (float) heightin/heightout;
+    convx = (float) widthin/widthout;
+    convy_int = floor(convy);
+    convy_float = convy - convy_int;
+    convx_int = floor(convx);
+    convx_float = convx - convx_int;
+
+    area = convx * convy;
+
+    lowy_int = 0;
+    lowy_float = 0;
+    highy_int = convy_int;
+    highy_float = convy_float;
+
+    for (i = 0; i < heightout; i++) {
+        lowx_int = 0;
+        lowx_float = 0;
+        highx_int = convx_int;
+        highx_float = convx_float;
+
+        for (j = 0; j < widthout; j++) {
+            /*
+            ** Ok, now apply box filter to box that goes from (lowx, lowy)
+            ** to (highx, highy) on input data into this pixel on output
+            ** data.
+            */
+            totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+
+            /* calculate the value for pixels in the 1st row */
+            xindex = lowx_int*group_size;
+            if((highy_int>lowy_int) && (highx_int>lowx_int)) {
+
+                y_percent = 1-lowy_float;
+                temp = (const char *)datain + xindex + lowy_int * ysize;
+                percent = y_percent * (1-lowx_float);
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLuint*)temp_index * percent;
+                    }
+                }
+                left = temp;
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+                                 __GLU_SWAP_4_BYTES(temp_index) * y_percent;
+                        } else {
+                            totals[k] += *(const GLuint*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                right = temp;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLuint*)temp_index * percent;
+                    }
+                }
+
+                /* calculate the value for pixels in the last row */
+                y_percent = highy_float;
+                percent = y_percent * (1-lowx_float);
+                temp = (const char *)datain + xindex + highy_int * ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLuint*)temp_index * percent;
+                    }
+                }
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+                                 __GLU_SWAP_4_BYTES(temp_index) * y_percent;
+                        } else {
+                            totals[k] += *(const GLuint*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLuint*)temp_index * percent;
+                    }
+                }
+
+                /* calculate the value for pixels in the 1st and last column */
+                for(m = lowy_int+1; m < highy_int; m++) {
+                    left += ysize;
+                    right += ysize;
+                    for (k = 0; k < components;
+                         k++, left += element_size, right += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] +=
+                                __GLU_SWAP_4_BYTES(left) * (1-lowx_float)
+                              + __GLU_SWAP_4_BYTES(right) * highx_float;
+                        } else {
+                            totals[k] += *(const GLuint*)left * (1-lowx_float)
+                                       + *(const GLuint*)right * highx_float;
+                        }
+                    }
+                }
+            } else if (highy_int > lowy_int) {
+                x_percent = highx_float - lowx_float;
+                percent = (1-lowy_float)*x_percent;
+                temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLuint*)temp_index * percent;
+                    }
+                }
+                for(m = lowy_int+1; m < highy_int; m++) {
+                    temp += ysize;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+                                 __GLU_SWAP_4_BYTES(temp_index) * x_percent;
+                        } else {
+                            totals[k] += *(const GLuint*)temp_index * x_percent;
+                        }
+                    }
+                }
+                percent = x_percent * highy_float;
+                temp += ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLuint*)temp_index * percent;
+                    }
+                }
+            } else if (highx_int > lowx_int) {
+                y_percent = highy_float - lowy_float;
+                percent = (1-lowx_float)*y_percent;
+   
+             temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLuint*)temp_index * percent;
+                    }
+                }
+                for (l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+                                 __GLU_SWAP_4_BYTES(temp_index) * y_percent;
+                        } else {
+                            totals[k] += *(const GLuint*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLuint*)temp_index * percent;
+                    }
+                }
+            } else {
+                percent = (highy_float-lowy_float)*(highx_float-lowx_float);
+                temp = (const char *)datain + xindex + lowy_int * ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLuint*)temp_index * percent;
+                    }
+                }
+            }
+
+            /* this is for the pixels in the body */
+            temp0 = (const char *)datain + xindex + group_size +
+		 (lowy_int+1)*ysize;
+            for (m = lowy_int+1; m < highy_int; m++) {
+                temp = temp0;
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += __GLU_SWAP_4_BYTES(temp_index);
+                        } else {
+                            totals[k] += *(const GLuint*)temp_index;
+                        }
+                    }
+                    temp += group_size;
+                }
+                temp0 += ysize;
+            }
+
+            outindex = (j + (i * widthout)) * components;
+            for (k = 0; k < components; k++) {
+	        /* clamp at UINT_MAX */
+	        float value= totals[k]/area;
+		if (value >= (float) UINT_MAX) {	/* need '=' */
+		  dataout[outindex + k] = UINT_MAX;
+		}
+                else dataout[outindex + k] = value;
+	    }
+            lowx_int = highx_int;
+            lowx_float = highx_float;
+            highx_int += convx_int;
+            highx_float += convx_float;
+            if(highx_float > 1) {
+                highx_float -= 1.0;
+                highx_int++;
+            }
+        }
+        lowy_int = highy_int;
+        lowy_float = highy_float;
+        highy_int += convy_int;
+        highy_float += convy_float;
+        if(highy_float > 1) {
+            highy_float -= 1.0;
+            highy_int++;
+        }
+    }
+}
+
+
+
+static void scale_internal_int(GLint components, GLint widthin,
+                           GLint heightin, const GLint *datain,
+                           GLint widthout, GLint heightout,
+                           GLint *dataout, GLint element_size,
+                           GLint ysize, GLint group_size,
+                           GLint myswap_bytes)
+{
+    float x, convx;
+    float y, convy;
+    float percent;
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float area;
+    int i,j,k,xindex;
+
+    const char *temp, *temp0;
+    const char *temp_index;
+    int outindex;
+
+    int lowx_int, highx_int, lowy_int, highy_int;
+    float x_percent, y_percent;
+    float lowx_float, highx_float, lowy_float, highy_float;
+    float convy_float, convx_float;
+    int convy_int, convx_int;
+    int l, m;
+    const char *left, *right;
+
+    GLuint swapbuf;	/* unsigned buffer */
+
+    if (widthin == widthout*2 && heightin == heightout*2) {
+        halveImage_int(components, widthin, heightin,
+        (const GLint *)datain, (GLint *)dataout,
+        element_size, ysize, group_size, myswap_bytes);
+        return;
+    }
+    convy = (float) heightin/heightout;
+    convx = (float) widthin/widthout;
+    convy_int = floor(convy);
+    convy_float = convy - convy_int;
+    convx_int = floor(convx);
+    convx_float = convx - convx_int;
+
+    area = convx * convy;
+
+    lowy_int = 0;
+    lowy_float = 0;
+    highy_int = convy_int;
+    highy_float = convy_float;
+
+    for (i = 0; i < heightout; i++) {
+        lowx_int = 0;
+        lowx_float = 0;
+        highx_int = convx_int;
+        highx_float = convx_float;
+
+        for (j = 0; j < widthout; j++) {
+            /*
+            ** Ok, now apply box filter to box that goes from (lowx, lowy)
+            ** to (highx, highy) on input data into this pixel on output
+            ** data.
+            */
+            totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+
+            /* calculate the value for pixels in the 1st row */
+            xindex = lowx_int*group_size;
+            if((highy_int>lowy_int) && (highx_int>lowx_int)) {
+
+                y_percent = 1-lowy_float;
+                temp = (const char *)datain + xindex + lowy_int * ysize;
+                percent = y_percent * (1-lowx_float);
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLint*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLint*)temp_index * percent;
+                    }
+                }
+                left = temp;
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLint*)&swapbuf * y_percent;
+                        } else {
+                            totals[k] += *(const GLint*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                right = temp;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLint*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLint*)temp_index * percent;
+                    }
+                }
+
+                /* calculate the value for pixels in the last row */
+                y_percent = highy_float;
+                percent = y_percent * (1-lowx_float);
+                temp = (const char *)datain + xindex + highy_int * ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLint*)&swapbuf  * percent;
+                    } else {
+                        totals[k] += *(const GLint*)temp_index * percent;
+                    }
+                }
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLint*)&swapbuf * y_percent;
+                        } else {
+                            totals[k] += *(const GLint*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLint*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLint*)temp_index * percent;
+                    }
+                }
+
+                /* calculate the value for pixels in the 1st and last column */
+                for(m = lowy_int+1; m < highy_int; m++) {
+                    left += ysize;
+                    right += ysize;
+                    for (k = 0; k < components;
+                         k++, left += element_size, right += element_size) {
+                        if (myswap_bytes) {
+                            swapbuf = __GLU_SWAP_4_BYTES(left);
+                            totals[k] += *(const GLint*)&swapbuf * (1-lowx_float);
+                            swapbuf = __GLU_SWAP_4_BYTES(right);
+                            totals[k] += *(const GLint*)&swapbuf * highx_float;
+                        } else {
+                            totals[k] += *(const GLint*)left * (1-lowx_float)
+                                       + *(const GLint*)right * highx_float;
+                        }
+                    }
+                }
+            } else if (highy_int > lowy_int) {
+                x_percent = highx_float - lowx_float;
+                percent = (1-lowy_float)*x_percent;
+                temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLint*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLint*)temp_index * percent;
+                    }
+                }
+                for(m = lowy_int+1; m < highy_int; m++) {
+                    temp += ysize;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLint*)&swapbuf * x_percent;
+                        } else {
+                            totals[k] += *(const GLint*)temp_index * x_percent;
+                        }
+                    }
+                }
+                percent = x_percent * highy_float;
+                temp += ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLint*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLint*)temp_index * percent;
+                    }
+                }
+            } else if (highx_int > lowx_int) {
+                y_percent = highy_float - lowy_float;
+                percent = (1-lowx_float)*y_percent;
+   
+                 temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLint*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLint*)temp_index * percent;
+                    }
+                }
+                for (l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLint*)&swapbuf * y_percent;
+                        } else {
+                            totals[k] += *(const GLint*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLint*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLint*)temp_index * percent;
+                    }
+                }
+            } else {
+                percent = (highy_float-lowy_float)*(highx_float-lowx_float);
+                temp = (const char *)datain + xindex + lowy_int * ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLint*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLint*)temp_index * percent;
+                    }
+                }
+            }
+
+            /* this is for the pixels in the body */
+            temp0 = (const char *)datain + xindex + group_size +
+		 (lowy_int+1)*ysize;
+            for (m = lowy_int+1; m < highy_int; m++) {
+                temp = temp0;
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLint*)&swapbuf;
+                        } else {
+                            totals[k] += *(const GLint*)temp_index;
+                        }
+                    }
+                    temp += group_size;
+                }
+                temp0 += ysize;
+            }
+
+            outindex = (j + (i * widthout)) * components;
+            for (k = 0; k < components; k++) {
+                dataout[outindex + k] = totals[k]/area;
+                /*printf("totals[%d] = %f\n", k, totals[k]);*/
+            }
+            lowx_int = highx_int;
+            lowx_float = highx_float;
+            highx_int += convx_int;
+            highx_float += convx_float;
+            if(highx_float > 1) {
+                highx_float -= 1.0;
+                highx_int++;
+            }
+        }
+        lowy_int = highy_int;
+        lowy_float = highy_float;
+        highy_int += convy_int;
+        highy_float += convy_float;
+        if(highy_float > 1) {
+            highy_float -= 1.0;
+            highy_int++;
+        }
+    }
+}
+
+
+
+static void scale_internal_float(GLint components, GLint widthin,
+                           GLint heightin, const GLfloat *datain,
+                           GLint widthout, GLint heightout,
+                           GLfloat *dataout, GLint element_size,
+                           GLint ysize, GLint group_size,
+                           GLint myswap_bytes)
+{
+    float x, convx;
+    float y, convy;
+    float percent;
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float area;
+    int i,j,k,xindex;
+
+    const char *temp, *temp0;
+    const char *temp_index;
+    int outindex;
+
+    int lowx_int, highx_int, lowy_int, highy_int;
+    float x_percent, y_percent;
+    float lowx_float, highx_float, lowy_float, highy_float;
+    float convy_float, convx_float;
+    int convy_int, convx_int;
+    int l, m;
+    const char *left, *right;
+
+    GLuint swapbuf;	/* unsigned buffer */
+
+    if (widthin == widthout*2 && heightin == heightout*2) {
+        halveImage_float(components, widthin, heightin,
+        (const GLfloat *)datain, (GLfloat *)dataout,
+        element_size, ysize, group_size, myswap_bytes);
+        return;
+    }
+    convy = (float) heightin/heightout;
+    convx = (float) widthin/widthout;
+    convy_int = floor(convy);
+    convy_float = convy - convy_int;
+    convx_int = floor(convx);
+    convx_float = convx - convx_int;
+
+    area = convx * convy;
+
+    lowy_int = 0;
+    lowy_float = 0;
+    highy_int = convy_int;
+    highy_float = convy_float;
+
+    for (i = 0; i < heightout; i++) {
+        lowx_int = 0;
+        lowx_float = 0;
+        highx_int = convx_int;
+        highx_float = convx_float;
+
+        for (j = 0; j < widthout; j++) {
+            /*
+            ** Ok, now apply box filter to box that goes from (lowx, lowy)
+            ** to (highx, highy) on input data into this pixel on output
+            ** data.
+            */
+            totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+
+            /* calculate the value for pixels in the 1st row */
+            xindex = lowx_int*group_size;
+            if((highy_int>lowy_int) && (highx_int>lowx_int)) {
+
+                y_percent = 1-lowy_float;
+                temp = (const char *)datain + xindex + lowy_int * ysize;
+                percent = y_percent * (1-lowx_float);
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLfloat*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLfloat*)temp_index * percent;
+                    }
+                }
+                left = temp;
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLfloat*)&swapbuf * y_percent;
+                        } else {
+                            totals[k] += *(const GLfloat*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                right = temp;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLfloat*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLfloat*)temp_index * percent;
+                    }
+                }
+
+                /* calculate the value for pixels in the last row */
+                y_percent = highy_float;
+                percent = y_percent * (1-lowx_float);
+                temp = (const char *)datain + xindex + highy_int * ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLfloat*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLfloat*)temp_index * percent;
+                    }
+                }
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLfloat*)&swapbuf * y_percent;
+                        } else {
+                            totals[k] += *(const GLfloat*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLfloat*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLfloat*)temp_index * percent;
+                    }
+                }
+
+                /* calculate the value for pixels in the 1st and last column */
+                for(m = lowy_int+1; m < highy_int; m++) {
+                    left += ysize;
+                    right += ysize;
+                    for (k = 0; k < components;
+                         k++, left += element_size, right += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_4_BYTES(left);
+                            totals[k] += *(const GLfloat*)&swapbuf * (1-lowx_float);
+                            swapbuf = __GLU_SWAP_4_BYTES(right);
+                            totals[k] += *(const GLfloat*)&swapbuf * highx_float;
+                        } else {
+                            totals[k] += *(const GLfloat*)left * (1-lowx_float)
+                                       + *(const GLfloat*)right * highx_float;
+                        }
+                    }
+                }
+            } else if (highy_int > lowy_int) {
+                x_percent = highx_float - lowx_float;
+                percent = (1-lowy_float)*x_percent;
+                temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLfloat*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLfloat*)temp_index * percent;
+                    }
+                }
+                for(m = lowy_int+1; m < highy_int; m++) {
+                    temp += ysize;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLfloat*)&swapbuf * x_percent;
+                        } else {
+                            totals[k] += *(const GLfloat*)temp_index * x_percent;
+                        }
+                    }
+                }
+                percent = x_percent * highy_float;
+                temp += ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLfloat*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLfloat*)temp_index * percent;
+                    }
+                }
+            } else if (highx_int > lowx_int) {
+                y_percent = highy_float - lowy_float;
+                percent = (1-lowx_float)*y_percent;
+   
+             temp = (const char *)datain + xindex + lowy_int*ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLfloat*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLfloat*)temp_index * percent;
+                    }
+                }
+                for (l = lowx_int+1; l < highx_int; l++) {
+                    temp += group_size;
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLfloat*)&swapbuf * y_percent;
+                        } else {
+                            totals[k] += *(const GLfloat*)temp_index * y_percent;
+                        }
+                    }
+                }
+                temp += group_size;
+                percent = y_percent * highx_float;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLfloat*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLfloat*)temp_index * percent;
+                    }
+                }
+            } else {
+                percent = (highy_float-lowy_float)*(highx_float-lowx_float);
+                temp = (const char *)datain + xindex + lowy_int * ysize;
+                for (k = 0, temp_index = temp; k < components;
+                     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+			swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                        totals[k] += *(const GLfloat*)&swapbuf * percent;
+                    } else {
+                        totals[k] += *(const GLfloat*)temp_index * percent;
+                    }
+                }
+            }
+
+            /* this is for the pixels in the body */
+            temp0 = (const char *)datain + xindex + group_size +
+		 (lowy_int+1)*ysize;
+            for (m = lowy_int+1; m < highy_int; m++) {
+                temp = temp0;
+                for(l = lowx_int+1; l < highx_int; l++) {
+                    for (k = 0, temp_index = temp; k < components;
+                         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+			    swapbuf = __GLU_SWAP_4_BYTES(temp_index);
+                            totals[k] += *(const GLfloat*)&swapbuf;
+                        } else {
+                            totals[k] += *(const GLfloat*)temp_index;
+                        }
+                    }
+                    temp += group_size;
+                }
+                temp0 += ysize;
+            }
+
+            outindex = (j + (i * widthout)) * components;
+            for (k = 0; k < components; k++) {
+                dataout[outindex + k] = totals[k]/area;
+                /*printf("totals[%d] = %f\n", k, totals[k]);*/
+            }
+            lowx_int = highx_int;
+            lowx_float = highx_float;
+            highx_int += convx_int;
+            highx_float += convx_float;
+            if(highx_float > 1) {
+                highx_float -= 1.0;
+                highx_int++;
+            }
+        }
+        lowy_int = highy_int;
+        lowy_float = highy_float;
+        highy_int += convy_int;
+        highy_float += convy_float;
+        if(highy_float > 1) {
+            highy_float -= 1.0;
+            highy_int++;
+        }
+    }
+}
+
+static int checkMipmapArgs(GLenum internalFormat, GLenum format, GLenum type)
+{
+    if (!legalFormat(format) || !legalType(type)) {
+	return GLU_INVALID_ENUM;
+    }
+    if (format == GL_STENCIL_INDEX) {
+	return GLU_INVALID_ENUM;
+    }
+
+    if (!isLegalFormatForPackedPixelType(format, type)) {
+	return GLU_INVALID_OPERATION; 
+    }
+
+    return 0;
+} /* checkMipmapArgs() */
+
+static GLboolean legalFormat(GLenum format)
+{
+    switch(format) {
+      case GL_COLOR_INDEX:
+      case GL_STENCIL_INDEX:
+      case GL_DEPTH_COMPONENT:
+      case GL_RED:
+      case GL_GREEN:
+      case GL_BLUE:
+      case GL_ALPHA:
+      case GL_RGB:
+      case GL_RGBA:
+      case GL_LUMINANCE:
+      case GL_LUMINANCE_ALPHA:
+      case GL_BGR:
+      case GL_BGRA:
+	return GL_TRUE;
+      default:
+	return GL_FALSE;
+    }
+}
+
+
+static GLboolean legalType(GLenum type)
+{
+    switch(type) {
+      case GL_BITMAP:
+      case GL_BYTE:
+      case GL_UNSIGNED_BYTE:
+      case GL_SHORT:
+      case GL_UNSIGNED_SHORT:
+      case GL_INT:
+      case GL_UNSIGNED_INT:
+      case GL_FLOAT:
+      case GL_UNSIGNED_BYTE_3_3_2:
+      case GL_UNSIGNED_BYTE_2_3_3_REV:	
+      case GL_UNSIGNED_SHORT_5_6_5:
+      case GL_UNSIGNED_SHORT_5_6_5_REV:
+      case GL_UNSIGNED_SHORT_4_4_4_4:
+      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+      case GL_UNSIGNED_SHORT_5_5_5_1:
+      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+      case GL_UNSIGNED_INT_8_8_8_8:
+      case GL_UNSIGNED_INT_8_8_8_8_REV:
+      case GL_UNSIGNED_INT_10_10_10_2:
+      case GL_UNSIGNED_INT_2_10_10_10_REV:
+         return GL_TRUE;
+      default:
+	return GL_FALSE;
+    }
+}
+
+/* */
+static GLboolean isTypePackedPixel(GLenum type)
+{
+   assert(legalType(type));
+
+   if (type == GL_UNSIGNED_BYTE_3_3_2 ||
+       type == GL_UNSIGNED_BYTE_2_3_3_REV ||
+       type == GL_UNSIGNED_SHORT_5_6_5 ||
+       type == GL_UNSIGNED_SHORT_5_6_5_REV ||
+       type == GL_UNSIGNED_SHORT_4_4_4_4 ||
+       type == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
+       type == GL_UNSIGNED_SHORT_5_5_5_1 ||
+       type == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
+       type == GL_UNSIGNED_INT_8_8_8_8 ||
+       type == GL_UNSIGNED_INT_8_8_8_8_REV ||
+       type == GL_UNSIGNED_INT_10_10_10_2 ||
+       type == GL_UNSIGNED_INT_2_10_10_10_REV) {
+      return 1;
+   }
+   else return 0;
+} /* isTypePackedPixel() */
+
+/* Determines if the packed pixel type is compatible with the format */
+static GLboolean isLegalFormatForPackedPixelType(GLenum format, GLenum type)
+{
+   /* if not a packed pixel type then return true */
+   if (!isTypePackedPixel(type)) {
+      return GL_TRUE;
+   }
+   
+   /* 3_3_2/2_3_3_REV & 5_6_5/5_6_5_REV are only compatible with RGB */
+   if ((type == GL_UNSIGNED_BYTE_3_3_2 || type == GL_UNSIGNED_BYTE_2_3_3_REV|| 
+	type == GL_UNSIGNED_SHORT_5_6_5|| type == GL_UNSIGNED_SHORT_5_6_5_REV)
+       && format != GL_RGB)
+      return GL_FALSE;
+   
+   /* 4_4_4_4/4_4_4_4_REV & 5_5_5_1/1_5_5_5_REV & 8_8_8_8/8_8_8_8_REV & 
+    * 10_10_10_2/2_10_10_10_REV are only compatible with RGBA, BGRA & ABGR_EXT.
+    */
+   if ((type == GL_UNSIGNED_SHORT_4_4_4_4 ||
+	type == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
+	type == GL_UNSIGNED_SHORT_5_5_5_1 ||
+	type == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
+	type == GL_UNSIGNED_INT_8_8_8_8 ||
+	type == GL_UNSIGNED_INT_8_8_8_8_REV ||
+	type == GL_UNSIGNED_INT_10_10_10_2 ||
+	type == GL_UNSIGNED_INT_2_10_10_10_REV) &&
+       (format != GL_RGBA && 
+	format != GL_BGRA)) {
+      return GL_FALSE;
+   }
+
+   return GL_TRUE;
+} /* isLegalFormatForPackedPixelType() */
+
+static GLboolean isLegalLevels(GLint userLevel,GLint baseLevel,GLint maxLevel, 
+			       GLint totalLevels)
+{
+   if (baseLevel < 0 || baseLevel < userLevel || maxLevel < baseLevel ||
+       totalLevels < maxLevel)
+      return GL_FALSE;
+   else return GL_TRUE;
+} /* isLegalLevels() */
+
+/* Given user requested texture size, determine if it fits. If it
+ * doesn't then halve both sides and make the determination again
+ * until it does fit (for IR only). 
+ * Note that proxy textures are not implemented in RE* even though
+ * they advertise the texture extension.  
+ * Note that proxy textures are implemented but not according to spec in
+ * IMPACT*.
+ */
+static void closestFit(GLenum target, GLint width, GLint height, 
+		       GLint internalFormat, GLenum format, GLenum type, 
+		       GLint *newWidth, GLint *newHeight)
+{
+   /* Use proxy textures if OpenGL version is >= 1.1 */
+   if ( (strtod((const char *)glGetString(GL_VERSION),NULL) >= 1.1)
+	) {
+      GLint widthPowerOf2= nearestPower(width);
+      GLint heightPowerOf2= nearestPower(height);   	
+      GLint proxyWidth;
+
+      do {
+	 /* compute level 1 width & height, clamping each at 1 */
+	 GLint widthAtLevelOne= (widthPowerOf2 > 1) ?
+	                         widthPowerOf2 >> 1 :
+				 widthPowerOf2;  
+	 GLint heightAtLevelOne= (heightPowerOf2 > 1) ?
+	                          heightPowerOf2 >> 1 :
+				  heightPowerOf2;  
+	 GLenum proxyTarget;
+	 assert(widthAtLevelOne > 0); assert(heightAtLevelOne > 0);
+
+	 /* does width x height at level 1 & all their mipmaps fit? */
+	 if (target == GL_TEXTURE_2D || target == GL_PROXY_TEXTURE_2D) {
+	    proxyTarget = GL_PROXY_TEXTURE_2D;
+	    glTexImage2D(proxyTarget, 1, /* must be non-zero */
+			 internalFormat,
+			 widthAtLevelOne,heightAtLevelOne,0,format,type,NULL);
+	 } else
+#if defined(GL_ARB_texture_cube_map)
+         if ((target == GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB) ||
+             (target == GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB) ||
+             (target == GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB) ||
+             (target == GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB) ||
+             (target == GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB) ||
+             (target == GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB)) {
+             proxyTarget = GL_PROXY_TEXTURE_CUBE_MAP_ARB;
+             glTexImage2D(proxyTarget, 1, /* must be non-zero */
+                          internalFormat,
+                          widthAtLevelOne,heightAtLevelOne,0,format,type,NULL);
+         } else
+#endif /* GL_ARB_texture_cube_map */
+         {
+	    assert(target == GL_TEXTURE_1D || target == GL_PROXY_TEXTURE_1D);
+	    proxyTarget = GL_PROXY_TEXTURE_1D;
+	    glTexImage1D(proxyTarget, 1, /* must be non-zero */
+			 internalFormat,widthAtLevelOne,0,format,type,NULL);
+	 }
+	 glGetTexLevelParameteriv(proxyTarget, 1,GL_TEXTURE_WIDTH,&proxyWidth);
+	 /* does it fit??? */
+	 if (proxyWidth == 0) { /* nope, so try again with these sizes */
+	    if (widthPowerOf2 == 1 && heightPowerOf2 == 1) {
+	       /* An 1x1 texture couldn't fit for some reason, so
+		* break out.  This should never happen. But things
+		* happen.  The disadvantage with this if-statement is
+		* that we will never be aware of when this happens
+		* since it will silently branch out.  
+		*/
+	       goto noProxyTextures;
+	    }
+	    widthPowerOf2= widthAtLevelOne;
+	    heightPowerOf2= heightAtLevelOne;
+	 } 
+	 /* else it does fit */
+      } while (proxyWidth == 0);
+      /* loop must terminate! */
+
+      /* return the width & height at level 0 that fits */
+      *newWidth= widthPowerOf2;
+      *newHeight= heightPowerOf2;
+/*printf("Proxy Textures\n");*/
+   } /* if gluCheckExtension() */
+   else {			/* no texture extension, so do this instead */
+      GLint maxsize;
+
+noProxyTextures:
+
+      glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
+      /* clamp user's texture sizes to maximum sizes, if necessary */
+      *newWidth = nearestPower(width);
+      if (*newWidth > maxsize) *newWidth = maxsize;
+      *newHeight = nearestPower(height);
+      if (*newHeight > maxsize) *newHeight = maxsize;
+/*printf("NO proxy textures\n");*/
+   }
+} /* closestFit() */
+
+GLint GLAPIENTRY
+gluScaleImage(GLenum format, GLsizei widthin, GLsizei heightin, 
+		    GLenum typein, const void *datain, 
+		    GLsizei widthout, GLsizei heightout, GLenum typeout,
+		    void *dataout)
+{
+    int components;
+    GLushort *beforeImage;
+    GLushort *afterImage;
+    PixelStorageModes psm;
+
+    if (widthin == 0 || heightin == 0 || widthout == 0 || heightout == 0) {
+	return 0;
+    }
+    if (widthin < 0 || heightin < 0 || widthout < 0 || heightout < 0) {
+	return GLU_INVALID_VALUE;
+    }
+    if (!legalFormat(format) || !legalType(typein) || !legalType(typeout)) {
+	return GLU_INVALID_ENUM;
+    }
+    if (!isLegalFormatForPackedPixelType(format, typein)) {
+       return GLU_INVALID_OPERATION;
+    }
+    if (!isLegalFormatForPackedPixelType(format, typeout)) {
+       return GLU_INVALID_OPERATION;
+    }
+    beforeImage =
+	malloc(image_size(widthin, heightin, format, GL_UNSIGNED_SHORT)); 
+    afterImage =
+	malloc(image_size(widthout, heightout, format, GL_UNSIGNED_SHORT));
+    if (beforeImage == NULL || afterImage == NULL) {
+	return GLU_OUT_OF_MEMORY;
+    }
+
+    retrieveStoreModes(&psm);
+    fill_image(&psm,widthin, heightin, format, typein, is_index(format),
+	    datain, beforeImage);
+    components = elements_per_group(format, 0);
+    scale_internal(components, widthin, heightin, beforeImage, 
+	    widthout, heightout, afterImage);
+    empty_image(&psm,widthout, heightout, format, typeout, 
+	    is_index(format), afterImage, dataout);
+    free((GLbyte *) beforeImage);
+    free((GLbyte *) afterImage);
+
+    return 0;
+}
+
+int gluBuild1DMipmapLevelsCore(GLenum target, GLint internalFormat,
+			       GLsizei width,
+			       GLsizei widthPowerOf2,
+			       GLenum format, GLenum type, 
+			       GLint userLevel, GLint baseLevel,GLint maxLevel,
+			       const void *data)
+{
+    GLint newwidth;
+    GLint level, levels;
+    GLushort *newImage;
+    GLint newImage_width;
+    GLushort *otherImage;
+    GLushort *imageTemp;
+    GLint memreq;
+    GLint maxsize;
+    GLint cmpts;
+    PixelStorageModes psm;
+
+    assert(checkMipmapArgs(internalFormat,format,type) == 0);
+    assert(width >= 1);
+
+    otherImage = NULL;
+
+    newwidth= widthPowerOf2;
+    levels = computeLog(newwidth);
+
+    levels+= userLevel;
+
+    retrieveStoreModes(&psm);
+    newImage = (GLushort *)
+	malloc(image_size(width, 1, format, GL_UNSIGNED_SHORT)); 
+    newImage_width = width;
+    if (newImage == NULL) {
+	return GLU_OUT_OF_MEMORY;
+    }
+    fill_image(&psm,width, 1, format, type, is_index(format),
+	    data, newImage);
+    cmpts = elements_per_group(format,type);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+    /*
+    ** If swap_bytes was set, swapping occurred in fill_image.
+    */
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
+
+    for (level = userLevel; level <= levels; level++) {
+	if (newImage_width == newwidth) {
+	    /* Use newImage for this level */
+	    if (baseLevel <= level && level <= maxLevel) {
+	    glTexImage1D(target, level, internalFormat, newImage_width, 
+		    0, format, GL_UNSIGNED_SHORT, (void *) newImage);
+	    }
+	} else {
+	    if (otherImage == NULL) {
+		memreq = image_size(newwidth, 1, format, GL_UNSIGNED_SHORT);
+		otherImage = (GLushort *) malloc(memreq);
+		if (otherImage == NULL) {
+		    glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+		    glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+		    glPixelStorei(GL_UNPACK_SKIP_PIXELS,psm.unpack_skip_pixels);
+		    glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+		    glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+		    return GLU_OUT_OF_MEMORY;
+		}
+	    }
+	    scale_internal(cmpts, newImage_width, 1, newImage, 
+		    newwidth, 1, otherImage);
+	    /* Swap newImage and otherImage */
+	    imageTemp = otherImage; 
+	    otherImage = newImage;
+	    newImage = imageTemp;
+
+	    newImage_width = newwidth;
+	    if (baseLevel <= level && level <= maxLevel) {
+	    glTexImage1D(target, level, internalFormat, newImage_width,
+		    0, format, GL_UNSIGNED_SHORT, (void *) newImage);
+	    }
+	}
+	if (newwidth > 1) newwidth /= 2;
+    }
+    glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+
+    free((GLbyte *) newImage);
+    if (otherImage) {
+	free((GLbyte *) otherImage);
+    }
+    return 0;
+}
+
+GLint GLAPIENTRY
+gluBuild1DMipmapLevels(GLenum target, GLint internalFormat, 
+			     GLsizei width,
+			     GLenum format, GLenum type, 
+			     GLint userLevel, GLint baseLevel, GLint maxLevel,
+			     const void *data)
+{
+   int levels;
+
+   int rc= checkMipmapArgs(internalFormat,format,type);
+   if (rc != 0) return rc;
+
+   if (width < 1) {
+       return GLU_INVALID_VALUE;
+   }
+
+   levels = computeLog(width);
+
+   levels+= userLevel;
+   if (!isLegalLevels(userLevel,baseLevel,maxLevel,levels)) 
+      return GLU_INVALID_VALUE;
+
+   return gluBuild1DMipmapLevelsCore(target, internalFormat, 
+				     width,
+				     width,format, type, 
+				     userLevel, baseLevel, maxLevel,
+				     data);
+} /* gluBuild1DMipmapLevels() */
+
+GLint GLAPIENTRY
+gluBuild1DMipmaps(GLenum target, GLint internalFormat, GLsizei width,
+			GLenum format, GLenum type, 
+			const void *data)
+{
+   GLint widthPowerOf2;
+   int levels;
+   GLint dummy;
+
+   int rc= checkMipmapArgs(internalFormat,format,type);
+   if (rc != 0) return rc;
+
+   if (width < 1) {
+       return GLU_INVALID_VALUE;
+   }
+
+   closestFit(target,width,1,internalFormat,format,type,&widthPowerOf2,&dummy);
+   levels = computeLog(widthPowerOf2);
+
+   return gluBuild1DMipmapLevelsCore(target,internalFormat,
+				     width,
+				     widthPowerOf2,
+				     format,type,0,0,levels,data);
+}
+
+static int bitmapBuild2DMipmaps(GLenum target, GLint internalFormat,
+		     GLint width, GLint height, GLenum format,
+                     GLenum type, const void *data)
+{
+    GLint newwidth, newheight;
+    GLint level, levels;
+    GLushort *newImage;
+    GLint newImage_width;
+    GLint newImage_height;
+    GLushort *otherImage;
+    GLushort *imageTemp;
+    GLint memreq;
+    GLint maxsize;
+    GLint cmpts;
+    PixelStorageModes psm;
+
+    retrieveStoreModes(&psm);
+
+#if 0
+    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
+    newwidth = nearestPower(width);
+    if (newwidth > maxsize) newwidth = maxsize;
+    newheight = nearestPower(height);
+    if (newheight > maxsize) newheight = maxsize;
+#else
+    closestFit(target,width,height,internalFormat,format,type,
+	       &newwidth,&newheight);
+#endif
+    levels = computeLog(newwidth);
+    level = computeLog(newheight);
+    if (level > levels) levels=level;
+
+    otherImage = NULL;
+    newImage = (GLushort *)
+        malloc(image_size(width, height, format, GL_UNSIGNED_SHORT));
+    newImage_width = width;
+    newImage_height = height;
+    if (newImage == NULL) {
+        return GLU_OUT_OF_MEMORY;
+    }
+
+    fill_image(&psm,width, height, format, type, is_index(format),
+          data, newImage);
+
+    cmpts = elements_per_group(format,type);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+    /*
+    ** If swap_bytes was set, swapping occurred in fill_image.
+    */
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
+
+    for (level = 0; level <= levels; level++) {
+        if (newImage_width == newwidth && newImage_height == newheight) {            /* Use newImage for this level */
+            glTexImage2D(target, level, internalFormat, newImage_width,
+                    newImage_height, 0, format, GL_UNSIGNED_SHORT,
+                    (void *) newImage);
+        } else {
+            if (otherImage == NULL) {
+                memreq =
+                    image_size(newwidth, newheight, format, GL_UNSIGNED_SHORT);
+                otherImage = (GLushort *) malloc(memreq);
+                if (otherImage == NULL) {
+                    glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+                    glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+                    glPixelStorei(GL_UNPACK_SKIP_PIXELS,psm.unpack_skip_pixels);
+                    glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+                    glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+                    return GLU_OUT_OF_MEMORY;
+                }
+            }
+            scale_internal(cmpts, newImage_width, newImage_height, newImage,
+                    newwidth, newheight, otherImage);
+            /* Swap newImage and otherImage */
+            imageTemp = otherImage;
+            otherImage = newImage;
+            newImage = imageTemp;
+
+            newImage_width = newwidth;
+            newImage_height = newheight;
+            glTexImage2D(target, level, internalFormat, newImage_width,
+                    newImage_height, 0, format, GL_UNSIGNED_SHORT,
+                    (void *) newImage);
+        }
+        if (newwidth > 1) newwidth /= 2;
+        if (newheight > 1) newheight /= 2;
+    }
+    glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+
+    free((GLbyte *) newImage);
+    if (otherImage) {
+        free((GLbyte *) otherImage);
+    }
+    return 0;
+}
+
+/* To make swapping images less error prone */
+#define __GLU_INIT_SWAP_IMAGE void *tmpImage
+#define __GLU_SWAP_IMAGE(a,b) tmpImage = a; a = b; b = tmpImage;
+
+static int gluBuild2DMipmapLevelsCore(GLenum target, GLint internalFormat, 
+				      GLsizei width, GLsizei height, 
+				      GLsizei widthPowerOf2, 
+				      GLsizei heightPowerOf2, 
+				      GLenum format, GLenum type, 
+				      GLint userLevel, 
+				      GLint baseLevel,GLint maxLevel,
+				      const void *data)
+{
+    GLint newwidth, newheight;
+    GLint level, levels;
+    const void *usersImage; /* passed from user. Don't touch! */
+    void *srcImage, *dstImage; /* scratch area to build mipmapped images */
+    GLint newImage_width;
+    GLint newImage_height;
+    __GLU_INIT_SWAP_IMAGE;
+    GLint memreq;
+    GLint maxsize;
+    GLint cmpts;
+
+    GLint myswap_bytes, groups_per_line, element_size, group_size;
+    GLint rowsize, padding;
+    PixelStorageModes psm;
+
+    assert(checkMipmapArgs(internalFormat,format,type) == 0);
+    assert(width >= 1 && height >= 1);
+
+    if(type == GL_BITMAP) {
+	return bitmapBuild2DMipmaps(target, internalFormat, width, height,
+                format, type, data);
+    }
+
+    srcImage = dstImage = NULL;
+
+    newwidth= widthPowerOf2;
+    newheight= heightPowerOf2;
+    levels = computeLog(newwidth);
+    level = computeLog(newheight);
+    if (level > levels) levels=level;
+
+    levels+= userLevel;
+
+    retrieveStoreModes(&psm);
+    myswap_bytes = psm.unpack_swap_bytes;
+    cmpts = elements_per_group(format,type);
+    if (psm.unpack_row_length > 0) {
+	groups_per_line = psm.unpack_row_length;
+    } else {
+	groups_per_line = width;
+    }
+
+    element_size = bytes_per_element(type);
+    group_size = element_size * cmpts;
+    if (element_size == 1) myswap_bytes = 0;
+
+    rowsize = groups_per_line * group_size;
+    padding = (rowsize % psm.unpack_alignment);
+    if (padding) {
+	rowsize += psm.unpack_alignment - padding;
+    }
+    usersImage = (const GLubyte *) data + psm.unpack_skip_rows * rowsize + 
+	psm.unpack_skip_pixels * group_size;
+
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+
+    level = userLevel;
+
+    /* already power-of-two square */
+    if (width == newwidth && height == newheight) {
+	/* Use usersImage for level userLevel */
+        if (baseLevel <= level && level <= maxLevel) { 
+	glTexImage2D(target, level, internalFormat, width, 
+		height, 0, format, type,
+		usersImage);
+	}
+	if(levels == 0) { /* we're done. clean up and return */
+	  glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	  glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	  glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	  glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	  glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	  return 0;
+	}
+	{
+	   int nextWidth= newwidth/2;
+	   int nextHeight= newheight/2;
+
+	   /* clamp to 1 */
+	   if (nextWidth < 1) nextWidth= 1;
+	   if (nextHeight < 1) nextHeight= 1;
+	memreq = image_size(nextWidth, nextHeight, format, type);
+        }
+
+	switch(type) {
+	case GL_UNSIGNED_BYTE:
+	  dstImage = (GLubyte *)malloc(memreq);
+	  break;
+	case GL_BYTE:
+	  dstImage = (GLbyte *)malloc(memreq);
+	  break;
+	case GL_UNSIGNED_SHORT:
+	  dstImage = (GLushort *)malloc(memreq);
+	  break;
+	case GL_SHORT:
+	  dstImage = (GLshort *)malloc(memreq);
+	  break;
+	case GL_UNSIGNED_INT:
+	  dstImage = (GLuint *)malloc(memreq);
+	  break;
+	case GL_INT:
+	  dstImage = (GLint *)malloc(memreq);
+	  break;
+	case GL_FLOAT:
+	  dstImage = (GLfloat *)malloc(memreq);
+	  break;
+        case GL_UNSIGNED_BYTE_3_3_2: 
+        case GL_UNSIGNED_BYTE_2_3_3_REV: 
+	  dstImage = (GLubyte *)malloc(memreq);
+	  break;
+        case GL_UNSIGNED_SHORT_5_6_5:
+        case GL_UNSIGNED_SHORT_5_6_5_REV:
+        case GL_UNSIGNED_SHORT_4_4_4_4:
+        case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+        case GL_UNSIGNED_SHORT_5_5_5_1:
+        case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	  dstImage = (GLushort *)malloc(memreq);
+          break;
+        case GL_UNSIGNED_INT_8_8_8_8:
+        case GL_UNSIGNED_INT_8_8_8_8_REV:
+        case GL_UNSIGNED_INT_10_10_10_2:
+        case GL_UNSIGNED_INT_2_10_10_10_REV:
+	  dstImage = (GLuint *)malloc(memreq);	  
+	  break;
+	default:
+	  return GLU_INVALID_ENUM;
+	}
+	if (dstImage == NULL) {
+	  glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	  glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	  glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	  glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	  glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	  return GLU_OUT_OF_MEMORY;
+	}
+	else
+	  switch(type) {
+	  case GL_UNSIGNED_BYTE:
+	    halveImage_ubyte(cmpts, width, height,
+			     (const GLubyte *)usersImage, (GLubyte *)dstImage, 
+			     element_size, rowsize, group_size);
+	    break;
+	  case GL_BYTE:
+	    halveImage_byte(cmpts, width, height,
+			    (const GLbyte *)usersImage, (GLbyte *)dstImage, 
+			    element_size, rowsize, group_size);
+	    break;
+	  case GL_UNSIGNED_SHORT:
+	    halveImage_ushort(cmpts, width, height,
+			      (const GLushort *)usersImage, (GLushort *)dstImage,
+			      element_size, rowsize, group_size, myswap_bytes);
+	    break;
+	  case GL_SHORT:
+	    halveImage_short(cmpts, width, height,
+			     (const GLshort *)usersImage, (GLshort *)dstImage, 
+			     element_size, rowsize, group_size, myswap_bytes);
+	    break;
+	  case GL_UNSIGNED_INT:
+	    halveImage_uint(cmpts, width, height,
+			    (const GLuint *)usersImage, (GLuint *)dstImage, 
+			    element_size, rowsize, group_size, myswap_bytes);
+	    break;
+	  case GL_INT:
+	    halveImage_int(cmpts, width, height,
+			   (const GLint *)usersImage, (GLint *)dstImage, 
+			   element_size, rowsize, group_size, myswap_bytes);
+	    break;
+	  case GL_FLOAT:
+	    halveImage_float(cmpts, width, height,
+			     (const GLfloat *)usersImage, (GLfloat *)dstImage,
+			     element_size, rowsize, group_size, myswap_bytes);
+	    break;
+	  case GL_UNSIGNED_BYTE_3_3_2: 
+	    assert(format == GL_RGB);
+	    halveImagePackedPixel(3,extract332,shove332,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;
+          case GL_UNSIGNED_BYTE_2_3_3_REV:
+	    assert(format == GL_RGB);
+	    halveImagePackedPixel(3,extract233rev,shove233rev,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;
+          case GL_UNSIGNED_SHORT_5_6_5:
+	    halveImagePackedPixel(3,extract565,shove565,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+  	    break;
+          case GL_UNSIGNED_SHORT_5_6_5_REV:
+	    halveImagePackedPixel(3,extract565rev,shove565rev,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+  	    break;
+          case GL_UNSIGNED_SHORT_4_4_4_4:
+	    halveImagePackedPixel(4,extract4444,shove4444,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;          
+          case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	    halveImagePackedPixel(4,extract4444rev,shove4444rev,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;          
+          case GL_UNSIGNED_SHORT_5_5_5_1:
+	    halveImagePackedPixel(4,extract5551,shove5551,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;          
+          case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	    halveImagePackedPixel(4,extract1555rev,shove1555rev,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;          
+          case GL_UNSIGNED_INT_8_8_8_8:
+	    halveImagePackedPixel(4,extract8888,shove8888,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;          
+          case GL_UNSIGNED_INT_8_8_8_8_REV:
+	    halveImagePackedPixel(4,extract8888rev,shove8888rev,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;          
+          case GL_UNSIGNED_INT_10_10_10_2:
+	    halveImagePackedPixel(4,extract1010102,shove1010102,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;          
+          case GL_UNSIGNED_INT_2_10_10_10_REV:
+	    halveImagePackedPixel(4,extract2101010rev,shove2101010rev,
+				  width,height,usersImage,dstImage,
+				  element_size,rowsize,myswap_bytes);
+	    break;          
+          default:
+	    assert(0);
+	    break;
+	  }
+	newwidth = width/2;
+	newheight = height/2;
+	/* clamp to 1 */
+	if (newwidth < 1) newwidth= 1;
+	if (newheight < 1) newheight= 1; 
+
+	myswap_bytes = 0;
+	rowsize = newwidth * group_size;
+	memreq = image_size(newwidth, newheight, format, type);
+	/* Swap srcImage and dstImage */
+	__GLU_SWAP_IMAGE(srcImage,dstImage);
+	switch(type) {
+	case GL_UNSIGNED_BYTE:
+	  dstImage = (GLubyte *)malloc(memreq);
+	  break;
+	case GL_BYTE:
+	  dstImage = (GLbyte *)malloc(memreq);
+	  break;
+	case GL_UNSIGNED_SHORT:
+	  dstImage = (GLushort *)malloc(memreq);
+	  break;
+	case GL_SHORT:
+	  dstImage = (GLshort *)malloc(memreq);
+	  break;
+	case GL_UNSIGNED_INT:
+	  dstImage = (GLuint *)malloc(memreq);
+	  break;
+	case GL_INT:
+	  dstImage = (GLint *)malloc(memreq);
+	  break;
+	case GL_FLOAT:
+	  dstImage = (GLfloat *)malloc(memreq);
+	  break;
+        case GL_UNSIGNED_BYTE_3_3_2:
+        case GL_UNSIGNED_BYTE_2_3_3_REV:
+	  dstImage = (GLubyte *)malloc(memreq);
+	  break;
+        case GL_UNSIGNED_SHORT_5_6_5:
+        case GL_UNSIGNED_SHORT_5_6_5_REV:
+        case GL_UNSIGNED_SHORT_4_4_4_4:
+        case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+        case GL_UNSIGNED_SHORT_5_5_5_1:
+        case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	  dstImage = (GLushort *)malloc(memreq);
+	  break;
+        case GL_UNSIGNED_INT_8_8_8_8:
+        case GL_UNSIGNED_INT_8_8_8_8_REV:
+        case GL_UNSIGNED_INT_10_10_10_2:
+        case GL_UNSIGNED_INT_2_10_10_10_REV:
+	  dstImage = (GLuint *)malloc(memreq);
+	  break;
+	default:
+	  return GLU_INVALID_ENUM;
+	}
+	if (dstImage == NULL) {
+	  glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	  glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	  glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	  glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	  glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	  return GLU_OUT_OF_MEMORY;
+	}
+	/* level userLevel+1 is in srcImage; level userLevel already saved */
+	level = userLevel+1;
+    } else { /* user's image is *not* nice power-of-2 sized square */
+	memreq = image_size(newwidth, newheight, format, type);
+	switch(type) {
+            case GL_UNSIGNED_BYTE:
+                dstImage = (GLubyte *)malloc(memreq);
+                break;
+            case GL_BYTE:
+                dstImage = (GLbyte *)malloc(memreq);
+                break;
+            case GL_UNSIGNED_SHORT:
+                dstImage = (GLushort *)malloc(memreq);
+                break;
+            case GL_SHORT:
+                dstImage = (GLshort *)malloc(memreq);
+                break;
+            case GL_UNSIGNED_INT:
+                dstImage = (GLuint *)malloc(memreq);
+                break;
+            case GL_INT:
+                dstImage = (GLint *)malloc(memreq);
+                break;
+            case GL_FLOAT:
+                dstImage = (GLfloat *)malloc(memreq);
+                break;
+            case GL_UNSIGNED_BYTE_3_3_2:
+            case GL_UNSIGNED_BYTE_2_3_3_REV:
+                dstImage = (GLubyte *)malloc(memreq);
+		break;
+	    case GL_UNSIGNED_SHORT_5_6_5:
+	    case GL_UNSIGNED_SHORT_5_6_5_REV:
+	    case GL_UNSIGNED_SHORT_4_4_4_4:
+	    case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	    case GL_UNSIGNED_SHORT_5_5_5_1:
+	    case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+		dstImage = (GLushort *)malloc(memreq);
+		break;
+	    case GL_UNSIGNED_INT_8_8_8_8:
+	    case GL_UNSIGNED_INT_8_8_8_8_REV:
+	    case GL_UNSIGNED_INT_10_10_10_2:
+	    case GL_UNSIGNED_INT_2_10_10_10_REV:
+		dstImage = (GLuint *)malloc(memreq);
+		break;
+            default:
+                return GLU_INVALID_ENUM;
+        }
+
+	if (dstImage == NULL) {
+	    glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	    glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	    glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	    glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	    glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	    return GLU_OUT_OF_MEMORY;
+	}
+
+	switch(type) {
+	case GL_UNSIGNED_BYTE:
+	    scale_internal_ubyte(cmpts, width, height,
+				 (const GLubyte *)usersImage, newwidth, newheight,
+				 (GLubyte *)dstImage, element_size,
+				 rowsize, group_size);
+	    break;
+	case GL_BYTE:
+	    scale_internal_byte(cmpts, width, height,
+				(const GLbyte *)usersImage, newwidth, newheight, 
+				(GLbyte *)dstImage, element_size,
+				rowsize, group_size);
+	    break;
+	case GL_UNSIGNED_SHORT:
+	    scale_internal_ushort(cmpts, width, height,
+				  (const GLushort *)usersImage, newwidth, newheight,
+				  (GLushort *)dstImage, element_size,
+				  rowsize, group_size, myswap_bytes);
+	    break;
+	case GL_SHORT:
+	    scale_internal_short(cmpts, width, height,
+				 (const GLshort *)usersImage, newwidth, newheight,
+				 (GLshort *)dstImage, element_size,
+				 rowsize, group_size, myswap_bytes);
+	    break;
+	case GL_UNSIGNED_INT:
+	    scale_internal_uint(cmpts, width, height,
+				(const GLuint *)usersImage, newwidth, newheight,
+				(GLuint *)dstImage, element_size,
+				rowsize, group_size, myswap_bytes);
+	    break;
+	case GL_INT:
+	    scale_internal_int(cmpts, width, height,
+			       (const GLint *)usersImage, newwidth, newheight, 
+			       (GLint *)dstImage, element_size,
+			       rowsize, group_size, myswap_bytes);
+	    break;
+	case GL_FLOAT:
+	    scale_internal_float(cmpts, width, height,
+				 (const GLfloat *)usersImage, newwidth, newheight, 
+				 (GLfloat *)dstImage, element_size,
+				 rowsize, group_size, myswap_bytes);
+	    break;
+        case GL_UNSIGNED_BYTE_3_3_2:
+	    scaleInternalPackedPixel(3,extract332,shove332,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_BYTE_2_3_3_REV:
+	    scaleInternalPackedPixel(3,extract233rev,shove233rev,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_SHORT_5_6_5:
+	    scaleInternalPackedPixel(3,extract565,shove565,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_SHORT_5_6_5_REV:
+	    scaleInternalPackedPixel(3,extract565rev,shove565rev,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_SHORT_4_4_4_4:
+	    scaleInternalPackedPixel(4,extract4444,shove4444,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	    scaleInternalPackedPixel(4,extract4444rev,shove4444rev,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_SHORT_5_5_5_1:
+	    scaleInternalPackedPixel(4,extract5551,shove5551,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	    scaleInternalPackedPixel(4,extract1555rev,shove1555rev,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_INT_8_8_8_8:
+	    scaleInternalPackedPixel(4,extract8888,shove8888,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_INT_8_8_8_8_REV:
+	    scaleInternalPackedPixel(4,extract8888rev,shove8888rev,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_INT_10_10_10_2:
+	    scaleInternalPackedPixel(4,extract1010102,shove1010102,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        case GL_UNSIGNED_INT_2_10_10_10_REV:
+	    scaleInternalPackedPixel(4,extract2101010rev,shove2101010rev,
+				     width, height,usersImage,
+				     newwidth,newheight,(void *)dstImage,
+				     element_size,rowsize,myswap_bytes);
+	    break;
+        default:
+	    assert(0);
+	    break;
+	}
+	myswap_bytes = 0;
+	rowsize = newwidth * group_size;
+	/* Swap dstImage and srcImage */
+	__GLU_SWAP_IMAGE(srcImage,dstImage);
+
+	if(levels != 0) { /* use as little memory as possible */
+          {
+	     int nextWidth= newwidth/2;
+	     int nextHeight= newheight/2;
+	     if (nextWidth < 1) nextWidth= 1;
+	     if (nextHeight < 1) nextHeight= 1;	     
+
+	  memreq = image_size(nextWidth, nextHeight, format, type);
+          }
+
+	  switch(type) {
+	  case GL_UNSIGNED_BYTE:
+	    dstImage = (GLubyte *)malloc(memreq);
+	    break;
+	  case GL_BYTE:
+	    dstImage = (GLbyte *)malloc(memreq);
+	    break;
+	  case GL_UNSIGNED_SHORT:
+	    dstImage = (GLushort *)malloc(memreq);
+	    break;
+	  case GL_SHORT:
+	    dstImage = (GLshort *)malloc(memreq);
+	    break;
+	  case GL_UNSIGNED_INT:
+	    dstImage = (GLuint *)malloc(memreq);
+	    break;
+	  case GL_INT:
+	    dstImage = (GLint *)malloc(memreq);
+	    break;
+	  case GL_FLOAT:
+	    dstImage = (GLfloat *)malloc(memreq);
+	    break;
+          case GL_UNSIGNED_BYTE_3_3_2:
+          case GL_UNSIGNED_BYTE_2_3_3_REV:
+	    dstImage = (GLubyte *)malloc(memreq);
+	    break;
+          case GL_UNSIGNED_SHORT_5_6_5:
+          case GL_UNSIGNED_SHORT_5_6_5_REV:
+	  case GL_UNSIGNED_SHORT_4_4_4_4:
+	  case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	  case GL_UNSIGNED_SHORT_5_5_5_1:
+	  case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	    dstImage = (GLushort *)malloc(memreq);
+	    break;
+	  case GL_UNSIGNED_INT_8_8_8_8:
+	  case GL_UNSIGNED_INT_8_8_8_8_REV:
+	  case GL_UNSIGNED_INT_10_10_10_2:
+	  case GL_UNSIGNED_INT_2_10_10_10_REV:
+	    dstImage = (GLuint *)malloc(memreq);
+	    break;
+	  default:
+	    return GLU_INVALID_ENUM;
+	  }
+	  if (dstImage == NULL) {
+	    glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	    glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	    glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	    glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	    glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	    return GLU_OUT_OF_MEMORY;
+	  }
+	}
+	/* level userLevel is in srcImage; nothing saved yet */
+	level = userLevel; 
+    }
+
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
+    if (baseLevel <= level && level <= maxLevel) {
+    glTexImage2D(target, level, internalFormat, newwidth, newheight, 0, 
+		 format, type, (void *)srcImage);
+    }
+
+    level++; /* update current level for the loop */
+    for (; level <= levels; level++) {
+	switch(type) {
+	    case GL_UNSIGNED_BYTE:
+		halveImage_ubyte(cmpts, newwidth, newheight,
+		(GLubyte *)srcImage, (GLubyte *)dstImage, element_size,
+		rowsize, group_size);
+		break;
+	    case GL_BYTE:
+		halveImage_byte(cmpts, newwidth, newheight,
+		(GLbyte *)srcImage, (GLbyte *)dstImage, element_size,
+		rowsize, group_size);
+		break;
+	    case GL_UNSIGNED_SHORT:
+		halveImage_ushort(cmpts, newwidth, newheight,
+		(GLushort *)srcImage, (GLushort *)dstImage, element_size,
+		rowsize, group_size, myswap_bytes);
+		break;
+	    case GL_SHORT:
+		halveImage_short(cmpts, newwidth, newheight,
+		(GLshort *)srcImage, (GLshort *)dstImage, element_size,
+		rowsize, group_size, myswap_bytes);
+		break;
+	    case GL_UNSIGNED_INT:
+		halveImage_uint(cmpts, newwidth, newheight,
+		(GLuint *)srcImage, (GLuint *)dstImage, element_size,
+		rowsize, group_size, myswap_bytes);
+		break;
+	    case GL_INT:
+		halveImage_int(cmpts, newwidth, newheight,
+		(GLint *)srcImage, (GLint *)dstImage, element_size,
+		rowsize, group_size, myswap_bytes);
+		break;
+	    case GL_FLOAT:
+		halveImage_float(cmpts, newwidth, newheight,
+		(GLfloat *)srcImage, (GLfloat *)dstImage, element_size,
+		rowsize, group_size, myswap_bytes);
+		break;
+            case GL_UNSIGNED_BYTE_3_3_2:
+	        halveImagePackedPixel(3,extract332,shove332,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+            case GL_UNSIGNED_BYTE_2_3_3_REV:
+	        halveImagePackedPixel(3,extract233rev,shove233rev,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+	    case GL_UNSIGNED_SHORT_5_6_5:
+	        halveImagePackedPixel(3,extract565,shove565,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+	        break;
+	    case GL_UNSIGNED_SHORT_5_6_5_REV:
+	        halveImagePackedPixel(3,extract565rev,shove565rev,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+	        break;
+            case GL_UNSIGNED_SHORT_4_4_4_4:
+	        halveImagePackedPixel(4,extract4444,shove4444,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+            case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	        halveImagePackedPixel(4,extract4444rev,shove4444rev,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+            case GL_UNSIGNED_SHORT_5_5_5_1: 		
+	        halveImagePackedPixel(4,extract5551,shove5551,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+            case GL_UNSIGNED_SHORT_1_5_5_5_REV: 		
+	        halveImagePackedPixel(4,extract1555rev,shove1555rev,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+            case GL_UNSIGNED_INT_8_8_8_8:
+	        halveImagePackedPixel(4,extract8888,shove8888,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+            case GL_UNSIGNED_INT_8_8_8_8_REV:
+	        halveImagePackedPixel(4,extract8888rev,shove8888rev,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+            case GL_UNSIGNED_INT_10_10_10_2:
+	        halveImagePackedPixel(4,extract1010102,shove1010102,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+            case GL_UNSIGNED_INT_2_10_10_10_REV:
+	        halveImagePackedPixel(4,extract2101010rev,shove2101010rev,
+				      newwidth,newheight,
+				      srcImage,dstImage,element_size,rowsize,
+				      myswap_bytes);
+		break;
+   	    default:
+	        assert(0);
+		break;
+	}
+
+	__GLU_SWAP_IMAGE(srcImage,dstImage);
+
+    	if (newwidth > 1) { newwidth /= 2; rowsize /= 2;}
+    	if (newheight > 1) newheight /= 2;
+      {
+       /* compute amount to pad per row, if any */
+       int rowPad= rowsize % psm.unpack_alignment; 
+
+       /* should row be padded? */
+       if (rowPad == 0) {	/* nope, row should not be padded */
+	   /* call tex image with srcImage untouched since it's not padded */
+	   if (baseLevel <= level && level <= maxLevel) {
+	   glTexImage2D(target, level, internalFormat, newwidth, newheight, 0, 
+	   format, type, (void *) srcImage);
+	   }
+       }
+       else {			/* yes, row should be padded */
+	  /* compute length of new row in bytes, including padding */
+	  int newRowLength= rowsize + psm.unpack_alignment - rowPad;
+	  int ii; unsigned char *dstTrav, *srcTrav; /* indices for copying */
+
+	  /* allocate new image for mipmap of size newRowLength x newheight */
+	  void *newMipmapImage= malloc((size_t) (newRowLength*newheight));
+	  if (newMipmapImage == NULL) {
+	     /* out of memory so return */
+	     glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	     glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	     glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	     glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	     glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	     return GLU_OUT_OF_MEMORY;
+	  }
+
+	  /* copy image from srcImage into newMipmapImage by rows */
+	  for (ii= 0,
+	       dstTrav= (unsigned char *) newMipmapImage,
+	       srcTrav= (unsigned char *) srcImage;
+	       ii< newheight; 
+	       ii++,
+	       dstTrav+= newRowLength, /* make sure the correct distance... */
+	       srcTrav+= rowsize) {    /* ...is skipped */
+	     memcpy(dstTrav,srcTrav,rowsize);
+	     /* note that the pad bytes are not visited and will contain
+	      * garbage, which is ok.
+	      */
+	  } 
+
+	  /* ...and use this new image for mipmapping instead */ 
+	  if (baseLevel <= level && level <= maxLevel) {
+	  glTexImage2D(target, level, internalFormat, newwidth, newheight, 0, 
+		       format, type, newMipmapImage);
+	  }
+	  free(newMipmapImage);	/* don't forget to free it! */
+       } /* else */
+      }
+    } /* for level */
+    glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+
+    free(srcImage); /*if you get to here, a srcImage has always been malloc'ed*/
+    if (dstImage) { /* if it's non-rectangular and only 1 level */
+      free(dstImage);
+    }
+    return 0;
+} /* gluBuild2DMipmapLevelsCore() */
+
+GLint GLAPIENTRY
+gluBuild2DMipmapLevels(GLenum target, GLint internalFormat, 
+			     GLsizei width, GLsizei height, 
+			     GLenum format, GLenum type, 
+			     GLint userLevel, GLint baseLevel, GLint maxLevel,
+			     const void *data)
+{
+   int level, levels;
+
+   int rc= checkMipmapArgs(internalFormat,format,type);
+   if (rc != 0) return rc;
+
+   if (width < 1 || height < 1) {
+       return GLU_INVALID_VALUE;
+   }
+
+   levels = computeLog(width);
+   level = computeLog(height);
+   if (level > levels) levels=level;
+
+   levels+= userLevel;
+   if (!isLegalLevels(userLevel,baseLevel,maxLevel,levels)) 
+      return GLU_INVALID_VALUE;
+
+   return gluBuild2DMipmapLevelsCore(target, internalFormat, 
+				     width, height,
+				     width, height,
+				     format, type, 
+				     userLevel, baseLevel, maxLevel,
+				     data);
+} /* gluBuild2DMipmapLevels() */
+
+GLint GLAPIENTRY
+gluBuild2DMipmaps(GLenum target, GLint internalFormat, 
+			GLsizei width, GLsizei height, 
+			GLenum format, GLenum type, 
+			const void *data)
+{
+   GLint widthPowerOf2, heightPowerOf2;
+   int level, levels;
+
+   int rc= checkMipmapArgs(internalFormat,format,type);
+   if (rc != 0) return rc;
+
+   if (width < 1 || height < 1) {
+       return GLU_INVALID_VALUE;
+   }
+
+   closestFit(target,width,height,internalFormat,format,type,
+	      &widthPowerOf2,&heightPowerOf2);
+
+   levels = computeLog(widthPowerOf2);
+   level = computeLog(heightPowerOf2);
+   if (level > levels) levels=level;
+
+   return gluBuild2DMipmapLevelsCore(target,internalFormat,
+				     width, height,
+				     widthPowerOf2,heightPowerOf2,
+				     format,type,
+				     0,0,levels,data);
+}  /* gluBuild2DMipmaps() */
+
+/*
+** This routine is for the limited case in which
+**	type == GL_UNSIGNED_BYTE && format != index  && 
+**	unpack_alignment = 1 && unpack_swap_bytes == false
+**
+** so all of the work data can be kept as ubytes instead of shorts.
+*/
+static int fastBuild2DMipmaps(const PixelStorageModes *psm,
+		       GLenum target, GLint components, GLint width, 
+		     GLint height, GLenum format, 
+		     GLenum type, void *data)
+{
+    GLint newwidth, newheight;
+    GLint level, levels;
+    GLubyte *newImage;
+    GLint newImage_width;
+    GLint newImage_height;
+    GLubyte *otherImage;
+    GLubyte *imageTemp;
+    GLint memreq;
+    GLint maxsize;
+    GLint cmpts;
+
+
+#if 0
+    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
+    newwidth = nearestPower(width);
+    if (newwidth > maxsize) newwidth = maxsize;
+    newheight = nearestPower(height);
+    if (newheight > maxsize) newheight = maxsize;
+#else
+    closestFit(target,width,height,components,format,type,
+	       &newwidth,&newheight);
+#endif
+    levels = computeLog(newwidth);
+    level = computeLog(newheight);
+    if (level > levels) levels=level;
+
+    cmpts = elements_per_group(format,type);
+
+    otherImage = NULL;
+    /**
+    ** No need to copy the user data if its in the packed correctly.
+    ** Make sure that later routines don't change that data.
+    */
+    if (psm->unpack_skip_rows == 0 && psm->unpack_skip_pixels == 0) {
+	newImage = (GLubyte *)data;
+	newImage_width = width;
+	newImage_height = height;
+    } else {
+	GLint rowsize;
+	GLint groups_per_line;
+	GLint elements_per_line;
+	const GLubyte *start;
+	const GLubyte *iter;
+	GLubyte *iter2;
+	GLint i, j;
+
+	newImage = (GLubyte *) 
+	    malloc(image_size(width, height, format, GL_UNSIGNED_BYTE)); 
+	newImage_width = width;
+	newImage_height = height;
+	if (newImage == NULL) {
+	    return GLU_OUT_OF_MEMORY;
+	}
+
+	/*
+	** Abbreviated version of fill_image for this restricted case.
+	*/
+	if (psm->unpack_row_length > 0) {
+	    groups_per_line = psm->unpack_row_length;
+	} else {
+	    groups_per_line = width;
+	}
+	rowsize = groups_per_line * cmpts;
+	elements_per_line = width * cmpts;
+	start = (const GLubyte *) data + psm->unpack_skip_rows * rowsize + 
+		psm->unpack_skip_pixels * cmpts;
+	iter2 = newImage;
+
+	for (i = 0; i < height; i++) {
+	    iter = start;
+	    for (j = 0; j < elements_per_line; j++) {
+		*iter2 = *iter;
+		iter++;
+		iter2++;
+	    }
+	    start += rowsize;
+	}
+    }
+
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
+
+    for (level = 0; level <= levels; level++) {
+	if (newImage_width == newwidth && newImage_height == newheight) {
+	    /* Use newImage for this level */
+	    glTexImage2D(target, level, components, newImage_width, 
+		    newImage_height, 0, format, GL_UNSIGNED_BYTE, 
+		    (void *) newImage);
+	} else {
+	    if (otherImage == NULL) {
+		memreq = 
+		    image_size(newwidth, newheight, format, GL_UNSIGNED_BYTE);
+		otherImage = (GLubyte *) malloc(memreq);
+		if (otherImage == NULL) {
+		    glPixelStorei(GL_UNPACK_ALIGNMENT, psm->unpack_alignment);
+		    glPixelStorei(GL_UNPACK_SKIP_ROWS, psm->unpack_skip_rows);
+		    glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm->unpack_skip_pixels);
+		    glPixelStorei(GL_UNPACK_ROW_LENGTH,psm->unpack_row_length);
+		    glPixelStorei(GL_UNPACK_SWAP_BYTES,psm->unpack_swap_bytes);
+		    return GLU_OUT_OF_MEMORY;
+		}
+	    }
+/*
+	    scale_internal_ubyte(cmpts, newImage_width, newImage_height, 
+		    newImage, newwidth, newheight, otherImage);
+*/
+	    /* Swap newImage and otherImage */
+	    imageTemp = otherImage; 
+	    otherImage = newImage;
+	    newImage = imageTemp;
+
+	    newImage_width = newwidth;
+	    newImage_height = newheight;
+	    glTexImage2D(target, level, components, newImage_width, 
+		    newImage_height, 0, format, GL_UNSIGNED_BYTE, 
+		    (void *) newImage);
+	}
+	if (newwidth > 1) newwidth /= 2;
+	if (newheight > 1) newheight /= 2;
+    }
+    glPixelStorei(GL_UNPACK_ALIGNMENT, psm->unpack_alignment);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, psm->unpack_skip_rows);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm->unpack_skip_pixels);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, psm->unpack_row_length);
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, psm->unpack_swap_bytes);
+
+    if (newImage != (const GLubyte *)data) {
+	free((GLbyte *) newImage);
+    }
+    if (otherImage && otherImage != (const GLubyte *)data) {
+	free((GLbyte *) otherImage);
+    }
+    return 0;
+}
+
+/*
+ * Utility Routines
+ */
+static GLint elements_per_group(GLenum format, GLenum type) 
+{
+    /*
+     * Return the number of elements per group of a specified format
+     */
+
+    /* If the type is packedpixels then answer is 1 (ignore format) */
+    if (type == GL_UNSIGNED_BYTE_3_3_2 || 
+	type == GL_UNSIGNED_BYTE_2_3_3_REV ||
+	type == GL_UNSIGNED_SHORT_5_6_5 ||
+	type == GL_UNSIGNED_SHORT_5_6_5_REV ||
+	type == GL_UNSIGNED_SHORT_4_4_4_4 ||
+	type == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
+	type == GL_UNSIGNED_SHORT_5_5_5_1  ||
+	type == GL_UNSIGNED_SHORT_1_5_5_5_REV  ||
+	type == GL_UNSIGNED_INT_8_8_8_8 ||
+	type == GL_UNSIGNED_INT_8_8_8_8_REV ||
+	type == GL_UNSIGNED_INT_10_10_10_2 ||
+	type == GL_UNSIGNED_INT_2_10_10_10_REV) {
+        return 1;
+    }
+
+    /* Types are not packed pixels, so get elements per group */
+    switch(format) {
+      case GL_RGB:
+      case GL_BGR:
+	return 3;
+      case GL_LUMINANCE_ALPHA:
+	return 2;
+      case GL_RGBA:
+      case GL_BGRA:
+	return 4;
+      default:
+	return 1;
+    }
+}
+
+static GLfloat bytes_per_element(GLenum type) 
+{
+    /*
+     * Return the number of bytes per element, based on the element type
+     */
+    switch(type) {
+      case GL_BITMAP:
+	return 1.0 / 8.0;
+      case GL_UNSIGNED_SHORT:
+	return(sizeof(GLushort));
+      case GL_SHORT:
+	return(sizeof(GLshort));
+      case GL_UNSIGNED_BYTE:
+	return(sizeof(GLubyte));
+      case GL_BYTE:
+	return(sizeof(GLbyte));
+      case GL_INT:
+	return(sizeof(GLint));
+      case GL_UNSIGNED_INT:
+	return(sizeof(GLuint));
+      case GL_FLOAT:
+	return(sizeof(GLfloat));
+      case GL_UNSIGNED_BYTE_3_3_2:
+      case GL_UNSIGNED_BYTE_2_3_3_REV:	
+	return(sizeof(GLubyte));
+      case GL_UNSIGNED_SHORT_5_6_5:
+      case GL_UNSIGNED_SHORT_5_6_5_REV:
+      case GL_UNSIGNED_SHORT_4_4_4_4:
+      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+      case GL_UNSIGNED_SHORT_5_5_5_1:
+      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	return(sizeof(GLushort));
+      case GL_UNSIGNED_INT_8_8_8_8:
+      case GL_UNSIGNED_INT_8_8_8_8_REV:
+      case GL_UNSIGNED_INT_10_10_10_2:
+      case GL_UNSIGNED_INT_2_10_10_10_REV:
+	return(sizeof(GLuint));
+      default:
+	return 4;
+    }
+}
+
+static GLint is_index(GLenum format) 
+{
+    return format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX;
+}
+
+/*
+** Compute memory required for internal packed array of data of given type
+** and format.
+*/
+static GLint image_size(GLint width, GLint height, GLenum format, GLenum type) 
+{
+    int bytes_per_row;
+    int components;
+
+assert(width > 0);
+assert(height > 0);
+    components = elements_per_group(format,type);
+    if (type == GL_BITMAP) {
+	bytes_per_row = (width + 7) / 8;
+    } else {
+	bytes_per_row = bytes_per_element(type) * width;
+    }
+    return bytes_per_row * height * components;
+}
+
+/*
+** Extract array from user's data applying all pixel store modes.
+** The internal format used is an array of unsigned shorts.
+*/
+static void fill_image(const PixelStorageModes *psm,
+		       GLint width, GLint height, GLenum format, 
+		       GLenum type, GLboolean index_format, 
+		       const void *userdata, GLushort *newimage)
+{
+    GLint components;
+    GLint element_size;
+    GLint rowsize;
+    GLint padding;
+    GLint groups_per_line;
+    GLint group_size;
+    GLint elements_per_line;
+    const GLubyte *start;
+    const GLubyte *iter;
+    GLushort *iter2;
+    GLint i, j, k;
+    GLint myswap_bytes;
+
+    myswap_bytes = psm->unpack_swap_bytes;
+    components = elements_per_group(format,type);
+    if (psm->unpack_row_length > 0) {
+	groups_per_line = psm->unpack_row_length;
+    } else {
+	groups_per_line = width;
+    }
+
+    /* All formats except GL_BITMAP fall out trivially */
+    if (type == GL_BITMAP) {
+	GLint bit_offset;
+	GLint current_bit;
+
+	rowsize = (groups_per_line * components + 7) / 8;
+	padding = (rowsize % psm->unpack_alignment);
+	if (padding) {
+	    rowsize += psm->unpack_alignment - padding;
+	}
+	start = (const GLubyte *) userdata + psm->unpack_skip_rows * rowsize + 
+		(psm->unpack_skip_pixels * components / 8);
+	elements_per_line = width * components;
+	iter2 = newimage;
+	for (i = 0; i < height; i++) {
+	    iter = start;
+	    bit_offset = (psm->unpack_skip_pixels * components) % 8;
+	    for (j = 0; j < elements_per_line; j++) {
+		/* Retrieve bit */
+		if (psm->unpack_lsb_first) {
+		    current_bit = iter[0] & (1 << bit_offset);
+		} else {
+		    current_bit = iter[0] & (1 << (7 - bit_offset));
+		}
+		if (current_bit) {
+		    if (index_format) {
+			*iter2 = 1;
+		    } else {
+			*iter2 = 65535;
+		    }
+		} else {
+		    *iter2 = 0;
+		}
+		bit_offset++;
+		if (bit_offset == 8) {
+		    bit_offset = 0;
+		    iter++;
+		}
+		iter2++;
+	    }
+	    start += rowsize;
+	}
+    } else {
+	element_size = bytes_per_element(type);
+	group_size = element_size * components;
+	if (element_size == 1) myswap_bytes = 0;
+
+	rowsize = groups_per_line * group_size;
+	padding = (rowsize % psm->unpack_alignment);
+	if (padding) {
+	    rowsize += psm->unpack_alignment - padding;
+	}
+	start = (const GLubyte *) userdata + psm->unpack_skip_rows * rowsize + 
+		psm->unpack_skip_pixels * group_size;
+	elements_per_line = width * components;
+
+	iter2 = newimage;
+	for (i = 0; i < height; i++) {
+	    iter = start;
+	    for (j = 0; j < elements_per_line; j++) {
+		Type_Widget widget;
+		float extractComponents[4];
+
+		switch(type) {
+		  case GL_UNSIGNED_BYTE_3_3_2:
+		    extract332(0,iter,extractComponents);
+		    for (k = 0; k < 3; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+		  case GL_UNSIGNED_BYTE_2_3_3_REV:  
+		    extract233rev(0,iter,extractComponents);
+		    for (k = 0; k < 3; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+		  case GL_UNSIGNED_BYTE:
+		    if (index_format) {
+			*iter2++ = *iter;
+		    } else {
+			*iter2++ = (*iter) * 257;
+		    }
+		    break;
+		  case GL_BYTE:
+		    if (index_format) {
+			*iter2++ = *((const GLbyte *) iter);
+		    } else {
+			/* rough approx */
+			*iter2++ = (*((const GLbyte *) iter)) * 516;
+		    }
+		    break;
+		  case GL_UNSIGNED_SHORT_5_6_5:               		    
+		    extract565(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 3; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+		  case GL_UNSIGNED_SHORT_5_6_5_REV:            		    
+		    extract565rev(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 3; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+                  case GL_UNSIGNED_SHORT_4_4_4_4:		    
+		    extract4444(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 4; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+                  case GL_UNSIGNED_SHORT_4_4_4_4_REV:		    
+		    extract4444rev(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 4; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+                  case GL_UNSIGNED_SHORT_5_5_5_1:		    
+		    extract5551(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 4; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+ 		  case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+		    extract1555rev(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 4; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+		  case GL_UNSIGNED_SHORT:
+		  case GL_SHORT:
+		    if (myswap_bytes) {
+			widget.ub[0] = iter[1];
+			widget.ub[1] = iter[0];
+		    } else {
+			widget.ub[0] = iter[0];
+			widget.ub[1] = iter[1];
+		    }
+		    if (type == GL_SHORT) {
+			if (index_format) {
+			    *iter2++ = widget.s[0];
+			} else {
+			    /* rough approx */
+			    *iter2++ = widget.s[0]*2;
+			}
+		    } else {
+			*iter2++ = widget.us[0];
+		    }
+		    break;
+                  case GL_UNSIGNED_INT_8_8_8_8:		    
+		    extract8888(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 4; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+                  case GL_UNSIGNED_INT_8_8_8_8_REV:		    
+		    extract8888rev(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 4; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+                  case GL_UNSIGNED_INT_10_10_10_2:		    
+		    extract1010102(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 4; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+		  case GL_UNSIGNED_INT_2_10_10_10_REV:
+		    extract2101010rev(myswap_bytes,iter,extractComponents);
+		    for (k = 0; k < 4; k++) {
+		      *iter2++ = (GLushort)(extractComponents[k]*65535);
+		    }
+		    break;
+		  case GL_INT:
+		  case GL_UNSIGNED_INT:
+		  case GL_FLOAT:
+		    if (myswap_bytes) {
+			widget.ub[0] = iter[3];
+			widget.ub[1] = iter[2];
+			widget.ub[2] = iter[1];
+			widget.ub[3] = iter[0];
+		    } else {
+			widget.ub[0] = iter[0];
+			widget.ub[1] = iter[1];
+			widget.ub[2] = iter[2];
+			widget.ub[3] = iter[3];
+		    }
+		    if (type == GL_FLOAT) {
+			if (index_format) {
+			    *iter2++ = widget.f;
+			} else {
+			    *iter2++ = 65535 * widget.f;
+			}
+		    } else if (type == GL_UNSIGNED_INT) {
+			if (index_format) {
+			    *iter2++ = widget.ui;
+			} else {
+			    *iter2++ = widget.ui >> 16;
+			}
+		    } else {
+			if (index_format) {
+			    *iter2++ = widget.i;
+			} else {
+			    *iter2++ = widget.i >> 15;
+			}
+		    }
+		    break;
+		}
+		iter += element_size;
+	    } /* for j */
+	    start += rowsize;
+#if 1
+	    /* want 'iter' pointing at start, not within, row for assertion
+	     * purposes
+	     */
+	    iter= start;	
+#endif
+	} /* for i */
+
+       /* iterators should be one byte past end */
+       if (!isTypePackedPixel(type)) {
+	  assert(iter2 == &newimage[width*height*components]);
+       }
+       else {
+	  assert(iter2 == &newimage[width*height*
+				    elements_per_group(format,0)]);
+       }
+       assert( iter == &((const GLubyte *)userdata)[rowsize*height +
+					psm->unpack_skip_rows * rowsize + 
+					psm->unpack_skip_pixels * group_size] );
+
+    } /* else */
+} /* fill_image() */
+
+/*
+** Insert array into user's data applying all pixel store modes.
+** The internal format is an array of unsigned shorts.
+** empty_image() because it is the opposite of fill_image().
+*/
+static void empty_image(const PixelStorageModes *psm,
+			GLint width, GLint height, GLenum format, 
+		        GLenum type, GLboolean index_format, 
+			const GLushort *oldimage, void *userdata)
+{
+    GLint components;
+    GLint element_size;
+    GLint rowsize;
+    GLint padding;
+    GLint groups_per_line;
+    GLint group_size;
+    GLint elements_per_line;
+    GLubyte *start;
+    GLubyte *iter;
+    const GLushort *iter2;
+    GLint i, j, k;
+    GLint myswap_bytes;
+
+    myswap_bytes = psm->pack_swap_bytes;
+    components = elements_per_group(format,type);
+    if (psm->pack_row_length > 0) {
+	groups_per_line = psm->pack_row_length;
+    } else {
+	groups_per_line = width;
+    }
+
+    /* All formats except GL_BITMAP fall out trivially */
+    if (type == GL_BITMAP) {
+	GLint bit_offset;
+	GLint current_bit;
+
+	rowsize = (groups_per_line * components + 7) / 8;
+	padding = (rowsize % psm->pack_alignment);
+	if (padding) {
+	    rowsize += psm->pack_alignment - padding;
+	}
+	start = (GLubyte *) userdata + psm->pack_skip_rows * rowsize + 
+		(psm->pack_skip_pixels * components / 8);
+	elements_per_line = width * components;
+	iter2 = oldimage;
+	for (i = 0; i < height; i++) {
+	    iter = start;
+	    bit_offset = (psm->pack_skip_pixels * components) % 8;
+	    for (j = 0; j < elements_per_line; j++) {
+		if (index_format) {
+		    current_bit = iter2[0] & 1;
+		} else {
+		    if (iter2[0] > 32767) {
+			current_bit = 1;
+		    } else {
+			current_bit = 0;
+		    }
+		}
+
+		if (current_bit) {
+		    if (psm->pack_lsb_first) {
+			*iter |= (1 << bit_offset);
+		    } else {
+			*iter |= (1 << (7 - bit_offset));
+		    }
+		} else {
+		    if (psm->pack_lsb_first) {
+			*iter &= ~(1 << bit_offset);
+		    } else {
+			*iter &= ~(1 << (7 - bit_offset));
+		    }
+		}
+
+		bit_offset++;
+		if (bit_offset == 8) {
+		    bit_offset = 0;
+		    iter++;
+		}
+		iter2++;
+	    }
+	    start += rowsize;
+	}
+    } else {
+        float shoveComponents[4];
+
+	element_size = bytes_per_element(type);
+	group_size = element_size * components;
+	if (element_size == 1) myswap_bytes = 0;
+
+	rowsize = groups_per_line * group_size;
+	padding = (rowsize % psm->pack_alignment);
+	if (padding) {
+	    rowsize += psm->pack_alignment - padding;
+	}
+	start = (GLubyte *) userdata + psm->pack_skip_rows * rowsize + 
+		psm->pack_skip_pixels * group_size;
+	elements_per_line = width * components;
+
+	iter2 = oldimage;
+	for (i = 0; i < height; i++) {
+	    iter = start;
+	    for (j = 0; j < elements_per_line; j++) {
+		Type_Widget widget;
+
+		switch(type) {
+		  case GL_UNSIGNED_BYTE_3_3_2: 
+		    for (k = 0; k < 3; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove332(shoveComponents,0,(void *)iter);
+		    break;
+		  case GL_UNSIGNED_BYTE_2_3_3_REV:
+		    for (k = 0; k < 3; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove233rev(shoveComponents,0,(void *)iter);
+		    break; 
+		  case GL_UNSIGNED_BYTE:
+		    if (index_format) {
+			*iter = *iter2++;
+		    } else {
+			*iter = *iter2++ >> 8;
+		    }
+		    break;
+		  case GL_BYTE:
+		    if (index_format) {
+			*((GLbyte *) iter) = *iter2++;
+		    } else {
+			*((GLbyte *) iter) = *iter2++ >> 9;
+		    }
+		    break;
+		  case GL_UNSIGNED_SHORT_5_6_5:		    
+		    for (k = 0; k < 3; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove565(shoveComponents,0,(void *)&widget.us[0]);
+		    if (myswap_bytes) {
+		       iter[0] = widget.ub[1];
+		       iter[1] = widget.ub[0];
+		    }
+		    else {
+		       *(GLushort *)iter = widget.us[0];
+		    }
+		    break;
+		  case GL_UNSIGNED_SHORT_5_6_5_REV:		    
+		    for (k = 0; k < 3; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove565rev(shoveComponents,0,(void *)&widget.us[0]);
+		    if (myswap_bytes) {
+		       iter[0] = widget.ub[1];
+		       iter[1] = widget.ub[0];
+		    }
+		    else {
+		       *(GLushort *)iter = widget.us[0];
+		    }
+		    break;
+                  case GL_UNSIGNED_SHORT_4_4_4_4:
+		    for (k = 0; k < 4; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove4444(shoveComponents,0,(void *)&widget.us[0]);
+		    if (myswap_bytes) {
+		       iter[0] = widget.ub[1];
+		       iter[1] = widget.ub[0];
+		    } else {
+		       *(GLushort *)iter = widget.us[0];
+		    }
+		    break;
+                  case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+		    for (k = 0; k < 4; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove4444rev(shoveComponents,0,(void *)&widget.us[0]);
+		    if (myswap_bytes) {
+		       iter[0] = widget.ub[1];
+		       iter[1] = widget.ub[0];
+		    } else {
+		       *(GLushort *)iter = widget.us[0];
+		    }
+		    break;
+		  case GL_UNSIGNED_SHORT_5_5_5_1:
+		    for (k = 0; k < 4; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove5551(shoveComponents,0,(void *)&widget.us[0]);
+		    if (myswap_bytes) {
+		       iter[0] = widget.ub[1];
+		       iter[1] = widget.ub[0];
+		    } else {
+		       *(GLushort *)iter = widget.us[0];
+		    }
+		    break;
+		  case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+		    for (k = 0; k < 4; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove1555rev(shoveComponents,0,(void *)&widget.us[0]);
+		    if (myswap_bytes) {
+		       iter[0] = widget.ub[1];
+		       iter[1] = widget.ub[0];
+		    } else {
+		       *(GLushort *)iter = widget.us[0];
+		    }
+		    break;
+		  case GL_UNSIGNED_SHORT:
+		  case GL_SHORT:
+		    if (type == GL_SHORT) {
+			if (index_format) {
+			    widget.s[0] = *iter2++;
+			} else {
+			    widget.s[0] = *iter2++ >> 1;
+			}
+		    } else {
+			widget.us[0] = *iter2++;
+		    }
+		    if (myswap_bytes) {
+			iter[0] = widget.ub[1];
+			iter[1] = widget.ub[0];
+		    } else {
+			iter[0] = widget.ub[0];
+			iter[1] = widget.ub[1];
+		    }
+		    break;
+		  case GL_UNSIGNED_INT_8_8_8_8:  
+		    for (k = 0; k < 4; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove8888(shoveComponents,0,(void *)&widget.ui);
+		    if (myswap_bytes) {
+			iter[3] = widget.ub[0];
+			iter[2] = widget.ub[1];
+			iter[1] = widget.ub[2];
+			iter[0] = widget.ub[3];
+		    } else {
+		        *(GLuint *)iter= widget.ui;
+		    }
+
+		    break;
+		  case GL_UNSIGNED_INT_8_8_8_8_REV:  
+		    for (k = 0; k < 4; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove8888rev(shoveComponents,0,(void *)&widget.ui);
+		    if (myswap_bytes) {
+			iter[3] = widget.ub[0];
+			iter[2] = widget.ub[1];
+			iter[1] = widget.ub[2];
+			iter[0] = widget.ub[3];
+		    } else {
+		        *(GLuint *)iter= widget.ui;
+		    }
+		    break;
+		  case GL_UNSIGNED_INT_10_10_10_2:  
+		    for (k = 0; k < 4; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove1010102(shoveComponents,0,(void *)&widget.ui);
+		    if (myswap_bytes) {
+			iter[3] = widget.ub[0];
+			iter[2] = widget.ub[1];
+			iter[1] = widget.ub[2];
+			iter[0] = widget.ub[3];
+		    } else {
+		        *(GLuint *)iter= widget.ui;
+		    }
+		    break;
+		  case GL_UNSIGNED_INT_2_10_10_10_REV:
+		    for (k = 0; k < 4; k++) {
+		       shoveComponents[k]= *iter2++ / 65535.0;
+		    } 
+		    shove2101010rev(shoveComponents,0,(void *)&widget.ui);
+		    if (myswap_bytes) {
+			iter[3] = widget.ub[0];
+			iter[2] = widget.ub[1];
+			iter[1] = widget.ub[2];
+			iter[0] = widget.ub[3];
+		    } else {
+		        *(GLuint *)iter= widget.ui;
+		    }
+		    break;
+		  case GL_INT:
+		  case GL_UNSIGNED_INT:
+		  case GL_FLOAT:
+		    if (type == GL_FLOAT) {
+			if (index_format) {
+			    widget.f = *iter2++;
+			} else {
+			    widget.f = *iter2++ / (float) 65535.0;
+			}
+		    } else if (type == GL_UNSIGNED_INT) {
+			if (index_format) {
+			    widget.ui = *iter2++;
+			} else {
+			    widget.ui = (unsigned int) *iter2++ * 65537;
+			}
+		    } else {
+			if (index_format) {
+			    widget.i = *iter2++;
+			} else {
+			    widget.i = ((unsigned int) *iter2++ * 65537)/2;
+			}
+		    }
+		    if (myswap_bytes) {
+			iter[3] = widget.ub[0];
+			iter[2] = widget.ub[1];
+			iter[1] = widget.ub[2];
+			iter[0] = widget.ub[3];
+		    } else {
+			iter[0] = widget.ub[0];
+			iter[1] = widget.ub[1];
+			iter[2] = widget.ub[2];
+			iter[3] = widget.ub[3];
+		    }
+		    break;
+		}
+		iter += element_size;
+	    } /* for j */
+	    start += rowsize;
+#if 1
+	    /* want 'iter' pointing at start, not within, row for assertion
+	     * purposes
+	     */
+	    iter= start;	
+#endif
+	} /* for i */
+
+	/* iterators should be one byte past end */
+	if (!isTypePackedPixel(type)) {
+	   assert(iter2 == &oldimage[width*height*components]);
+	}
+	else {
+	   assert(iter2 == &oldimage[width*height*
+				     elements_per_group(format,0)]);
+	}
+	assert( iter == &((GLubyte *)userdata)[rowsize*height +
+					psm->pack_skip_rows * rowsize + 
+					psm->pack_skip_pixels * group_size] );
+
+    } /* else */
+} /* empty_image() */
+
+/*--------------------------------------------------------------------------
+ * Decimation of packed pixel types 
+ *--------------------------------------------------------------------------
+ */ 
+static void extract332(int isSwap,
+		       const void *packedPixel, GLfloat extractComponents[])
+{
+   GLubyte ubyte= *(const GLubyte *)packedPixel;
+
+   isSwap= isSwap;		/* turn off warnings */
+
+   /* 11100000 == 0xe0 */
+   /* 00011100 == 0x1c */
+   /* 00000011 == 0x03 */
+
+   extractComponents[0]=   (float)((ubyte & 0xe0)  >> 5) / 7.0;
+   extractComponents[1]=   (float)((ubyte & 0x1c)  >> 2) / 7.0; /* 7 = 2^3-1 */
+   extractComponents[2]=   (float)((ubyte & 0x03)      ) / 3.0;	/* 3 = 2^2-1 */
+} /* extract332() */
+
+static void shove332(const GLfloat shoveComponents[], 
+		     int index, void *packedPixel)	       
+{
+   /* 11100000 == 0xe0 */
+   /* 00011100 == 0x1c */
+   /* 00000011 == 0x03 */
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLubyte *)packedPixel)[index]  = 
+     ((GLubyte)((shoveComponents[0] * 7)+0.5)  << 5) & 0xe0;
+   ((GLubyte *)packedPixel)[index] |= 
+     ((GLubyte)((shoveComponents[1] * 7)+0.5)  << 2) & 0x1c;
+   ((GLubyte *)packedPixel)[index]  |=
+     ((GLubyte)((shoveComponents[2] * 3)+0.5)      ) & 0x03;
+} /* shove332() */
+
+static void extract233rev(int isSwap,
+			  const void *packedPixel, GLfloat extractComponents[])
+{
+   GLubyte ubyte= *(const GLubyte *)packedPixel;
+
+   isSwap= isSwap;		/* turn off warnings */
+
+   /* 0000,0111 == 0x07 */
+   /* 0011,1000 == 0x38 */  
+   /* 1100,0000 == 0xC0 */
+
+   extractComponents[0]= (float)((ubyte & 0x07)     ) / 7.0;
+   extractComponents[1]= (float)((ubyte & 0x38) >> 3) / 7.0;
+   extractComponents[2]= (float)((ubyte & 0xC0) >> 6) / 3.0;
+} /* extract233rev() */
+
+static void shove233rev(const GLfloat shoveComponents[], 
+			int index, void *packedPixel)	       
+{
+   /* 0000,0111 == 0x07 */
+   /* 0011,1000 == 0x38 */  
+   /* 1100,0000 == 0xC0 */
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLubyte *)packedPixel)[index] = 
+     ((GLubyte)((shoveComponents[0] * 7.0)+0.5)     ) & 0x07;
+   ((GLubyte *)packedPixel)[index]|= 
+     ((GLubyte)((shoveComponents[1] * 7.0)+0.5) << 3) & 0x38;
+   ((GLubyte *)packedPixel)[index]|= 
+     ((GLubyte)((shoveComponents[2] * 3.0)+0.5) << 6) & 0xC0;
+} /* shove233rev() */
+
+static void extract565(int isSwap,
+		       const void *packedPixel, GLfloat extractComponents[])
+{
+   GLushort ushort= *(const GLushort *)packedPixel; 
+
+   if (isSwap) {
+     ushort= __GLU_SWAP_2_BYTES(packedPixel);
+   }
+   else {
+     ushort= *(const GLushort *)packedPixel;
+   }
+
+   /* 11111000,00000000 == 0xf800 */
+   /* 00000111,11100000 == 0x07e0 */
+   /* 00000000,00011111 == 0x001f */
+
+   extractComponents[0]=(float)((ushort & 0xf800) >> 11) / 31.0;/* 31 = 2^5-1*/
+   extractComponents[1]=(float)((ushort & 0x07e0) >>  5) / 63.0;/* 63 = 2^6-1*/
+   extractComponents[2]=(float)((ushort & 0x001f)      ) / 31.0;
+} /* extract565() */
+
+static void shove565(const GLfloat shoveComponents[],
+		     int index,void *packedPixel)
+{
+   /* 11111000,00000000 == 0xf800 */
+   /* 00000111,11100000 == 0x07e0 */
+   /* 00000000,00011111 == 0x001f */
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLushort *)packedPixel)[index] = 
+     ((GLushort)((shoveComponents[0] * 31)+0.5) << 11) & 0xf800;
+   ((GLushort *)packedPixel)[index]|= 
+     ((GLushort)((shoveComponents[1] * 63)+0.5) <<  5) & 0x07e0;
+   ((GLushort *)packedPixel)[index]|= 
+     ((GLushort)((shoveComponents[2] * 31)+0.5)      ) & 0x001f;
+} /* shove565() */
+
+static void extract565rev(int isSwap,
+			  const void *packedPixel, GLfloat extractComponents[])
+{
+   GLushort ushort= *(const GLushort *)packedPixel; 
+
+   if (isSwap) {
+     ushort= __GLU_SWAP_2_BYTES(packedPixel);
+   }
+   else {
+     ushort= *(const GLushort *)packedPixel;
+   }
+
+   /* 00000000,00011111 == 0x001f */
+   /* 00000111,11100000 == 0x07e0 */
+   /* 11111000,00000000 == 0xf800 */
+
+   extractComponents[0]= (float)((ushort & 0x001F)      ) / 31.0;
+   extractComponents[1]= (float)((ushort & 0x07E0) >>  5) / 63.0;
+   extractComponents[2]= (float)((ushort & 0xF800) >> 11) / 31.0;
+} /* extract565rev() */
+
+static void shove565rev(const GLfloat shoveComponents[],
+			int index,void *packedPixel)
+{
+   /* 00000000,00011111 == 0x001f */
+   /* 00000111,11100000 == 0x07e0 */
+   /* 11111000,00000000 == 0xf800 */
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLushort *)packedPixel)[index] = 
+     ((GLushort)((shoveComponents[0] * 31.0)+0.5)      ) & 0x001F;
+   ((GLushort *)packedPixel)[index]|=   
+     ((GLushort)((shoveComponents[1] * 63.0)+0.5) <<  5) & 0x07E0;
+   ((GLushort *)packedPixel)[index]|=   
+     ((GLushort)((shoveComponents[2] * 31.0)+0.5) << 11) & 0xF800;
+} /* shove565rev() */
+
+static void extract4444(int isSwap,const void *packedPixel, 
+			GLfloat extractComponents[])
+{
+   GLushort ushort;
+
+   if (isSwap) {
+     ushort= __GLU_SWAP_2_BYTES(packedPixel);
+   }
+   else {
+     ushort= *(const GLushort *)packedPixel;
+   }
+
+   /* 11110000,00000000 == 0xf000 */  
+   /* 00001111,00000000 == 0x0f00 */  
+   /* 00000000,11110000 == 0x00f0 */  
+   /* 00000000,00001111 == 0x000f */  
+
+   extractComponents[0]= (float)((ushort & 0xf000) >> 12) / 15.0;/* 15=2^4-1 */
+   extractComponents[1]= (float)((ushort & 0x0f00) >>  8) / 15.0;
+   extractComponents[2]= (float)((ushort & 0x00f0) >>  4) / 15.0;
+   extractComponents[3]= (float)((ushort & 0x000f)      ) / 15.0;
+} /* extract4444() */
+
+static void shove4444(const GLfloat shoveComponents[],
+		      int index,void *packedPixel)
+{
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+   assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLushort *)packedPixel)[index] = 
+     ((GLushort)((shoveComponents[0] * 15)+0.5) << 12) & 0xf000;
+   ((GLushort *)packedPixel)[index]|= 
+     ((GLushort)((shoveComponents[1] * 15)+0.5) <<  8) & 0x0f00;
+   ((GLushort *)packedPixel)[index]|= 
+     ((GLushort)((shoveComponents[2] * 15)+0.5) <<  4) & 0x00f0;
+   ((GLushort *)packedPixel)[index]|= 
+     ((GLushort)((shoveComponents[3] * 15)+0.5)      ) & 0x000f;
+} /* shove4444() */
+
+static void extract4444rev(int isSwap,const void *packedPixel, 
+			   GLfloat extractComponents[])
+{
+   GLushort ushort;
+
+   if (isSwap) {
+     ushort= __GLU_SWAP_2_BYTES(packedPixel);
+   }
+   else {
+     ushort= *(const GLushort *)packedPixel;
+   }
+
+   /* 00000000,00001111 == 0x000f */  
+   /* 00000000,11110000 == 0x00f0 */  
+   /* 00001111,00000000 == 0x0f00 */  
+   /* 11110000,00000000 == 0xf000 */  
+
+   /* 15 = 2^4-1 */
+   extractComponents[0]= (float)((ushort & 0x000F)      ) / 15.0;
+   extractComponents[1]= (float)((ushort & 0x00F0) >>  4) / 15.0;
+   extractComponents[2]= (float)((ushort & 0x0F00) >>  8) / 15.0;
+   extractComponents[3]= (float)((ushort & 0xF000) >> 12) / 15.0;
+} /* extract4444rev() */
+
+static void shove4444rev(const GLfloat shoveComponents[],
+			 int index,void *packedPixel)
+{
+   /* 00000000,00001111 == 0x000f */  
+   /* 00000000,11110000 == 0x00f0 */  
+   /* 00001111,00000000 == 0x0f00 */  
+   /* 11110000,00000000 == 0xf000 */  
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+   assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLushort *)packedPixel)[index] =   
+     ((GLushort)((shoveComponents[0] * 15)+0.5)      ) & 0x000F;
+   ((GLushort *)packedPixel)[index]|=   
+     ((GLushort)((shoveComponents[1] * 15)+0.5) <<  4) & 0x00F0;
+   ((GLushort *)packedPixel)[index]|=   
+     ((GLushort)((shoveComponents[2] * 15)+0.5) <<  8) & 0x0F00;
+   ((GLushort *)packedPixel)[index]|=   
+     ((GLushort)((shoveComponents[3] * 15)+0.5) << 12) & 0xF000;
+} /* shove4444rev() */
+
+static void extract5551(int isSwap,const void *packedPixel, 
+			GLfloat extractComponents[])
+{
+   GLushort ushort;
+
+   if (isSwap) {
+     ushort= __GLU_SWAP_2_BYTES(packedPixel);
+   }
+   else {
+     ushort= *(const GLushort *)packedPixel;
+   }
+
+   /* 11111000,00000000 == 0xf800 */  
+   /* 00000111,11000000 == 0x07c0 */  
+   /* 00000000,00111110 == 0x003e */  
+   /* 00000000,00000001 == 0x0001 */  
+
+   extractComponents[0]=(float)((ushort & 0xf800) >> 11) / 31.0;/* 31 = 2^5-1*/
+   extractComponents[1]=(float)((ushort & 0x07c0) >>  6) / 31.0;
+   extractComponents[2]=(float)((ushort & 0x003e) >>  1) / 31.0;
+   extractComponents[3]=(float)((ushort & 0x0001)      );
+} /* extract5551() */
+
+static void shove5551(const GLfloat shoveComponents[],
+		      int index,void *packedPixel)
+{
+   /* 11111000,00000000 == 0xf800 */  
+   /* 00000111,11000000 == 0x07c0 */  
+   /* 00000000,00111110 == 0x003e */  
+   /* 00000000,00000001 == 0x0001 */  
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+   assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLushort *)packedPixel)[index]  = 
+     ((GLushort)((shoveComponents[0] * 31)+0.5) << 11) & 0xf800;
+   ((GLushort *)packedPixel)[index]|= 
+     ((GLushort)((shoveComponents[1] * 31)+0.5) <<  6) & 0x07c0;
+   ((GLushort *)packedPixel)[index]|= 
+     ((GLushort)((shoveComponents[2] * 31)+0.5) <<  1) & 0x003e;
+   ((GLushort *)packedPixel)[index]|= 
+     ((GLushort)((shoveComponents[3])+0.5)           ) & 0x0001;
+} /* shove5551() */
+
+static void extract1555rev(int isSwap,const void *packedPixel, 
+			   GLfloat extractComponents[])
+{
+   GLushort ushort;
+
+   if (isSwap) {
+     ushort= __GLU_SWAP_2_BYTES(packedPixel);
+   }
+   else {
+     ushort= *(const GLushort *)packedPixel;
+   }
+
+   /* 00000000,00011111 == 0x001F */  
+   /* 00000011,11100000 == 0x03E0 */  
+   /* 01111100,00000000 == 0x7C00 */  
+   /* 10000000,00000000 == 0x8000 */  
+
+   /* 31 = 2^5-1 */
+   extractComponents[0]= (float)((ushort & 0x001F)      ) / 31.0;  
+   extractComponents[1]= (float)((ushort & 0x03E0) >>  5) / 31.0;
+   extractComponents[2]= (float)((ushort & 0x7C00) >> 10) / 31.0;
+   extractComponents[3]= (float)((ushort & 0x8000) >> 15);
+} /* extract1555rev() */
+
+static void shove1555rev(const GLfloat shoveComponents[],
+			 int index,void *packedPixel)
+{
+   /* 00000000,00011111 == 0x001F */  
+   /* 00000011,11100000 == 0x03E0 */  
+   /* 01111100,00000000 == 0x7C00 */  
+   /* 10000000,00000000 == 0x8000 */  
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+   assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLushort *)packedPixel)[index] =   
+     ((GLushort)((shoveComponents[0] * 31)+0.5)      ) & 0x001F;
+   ((GLushort *)packedPixel)[index]|=   
+     ((GLushort)((shoveComponents[1] * 31)+0.5) <<  5) & 0x03E0;
+   ((GLushort *)packedPixel)[index]|=   
+     ((GLushort)((shoveComponents[2] * 31)+0.5) << 10) & 0x7C00;
+   ((GLushort *)packedPixel)[index]|=   
+     ((GLushort)((shoveComponents[3])+0.5)      << 15) & 0x8000;
+} /* shove1555rev() */ 
+
+static void extract8888(int isSwap,
+			const void *packedPixel, GLfloat extractComponents[])
+{
+   GLuint uint;
+
+   if (isSwap) {
+     uint= __GLU_SWAP_4_BYTES(packedPixel);
+   }
+   else {
+     uint= *(const GLuint *)packedPixel;
+   }
+
+   /* 11111111,00000000,00000000,00000000 == 0xff000000 */  
+   /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */  
+   /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */  
+   /* 00000000,00000000,00000000,11111111 == 0x000000ff */  
+
+   /* 255 = 2^8-1 */
+   extractComponents[0]= (float)((uint & 0xff000000) >> 24) / 255.0;
+   extractComponents[1]= (float)((uint & 0x00ff0000) >> 16) / 255.0;
+   extractComponents[2]= (float)((uint & 0x0000ff00) >>  8) / 255.0;
+   extractComponents[3]= (float)((uint & 0x000000ff)      ) / 255.0;
+} /* extract8888() */
+
+static void shove8888(const GLfloat shoveComponents[],
+		      int index,void *packedPixel)
+{
+   /* 11111111,00000000,00000000,00000000 == 0xff000000 */  
+   /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */  
+   /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */  
+   /* 00000000,00000000,00000000,11111111 == 0x000000ff */  
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+   assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLuint *)packedPixel)[index] = 
+     ((GLuint)((shoveComponents[0] * 255)+0.5) << 24) & 0xff000000;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[1] * 255)+0.5) << 16) & 0x00ff0000;
+   ((GLuint *)packedPixel)[index]|=    
+     ((GLuint)((shoveComponents[2] * 255)+0.5) <<  8) & 0x0000ff00;
+   ((GLuint *)packedPixel)[index]|=    
+     ((GLuint)((shoveComponents[3] * 255)+0.5)      ) & 0x000000ff;
+} /* shove8888() */
+
+static void extract8888rev(int isSwap,
+			   const void *packedPixel,GLfloat extractComponents[])
+{
+   GLuint uint;
+
+   if (isSwap) {
+     uint= __GLU_SWAP_4_BYTES(packedPixel);
+   }
+   else {
+     uint= *(const GLuint *)packedPixel;
+   }
+
+   /* 00000000,00000000,00000000,11111111 == 0x000000ff */  
+   /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */  
+   /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */  
+   /* 11111111,00000000,00000000,00000000 == 0xff000000 */  
+
+   /* 255 = 2^8-1 */
+   extractComponents[0]= (float)((uint & 0x000000FF)      ) / 255.0; 
+   extractComponents[1]= (float)((uint & 0x0000FF00) >>  8) / 255.0;
+   extractComponents[2]= (float)((uint & 0x00FF0000) >> 16) / 255.0;
+   extractComponents[3]= (float)((uint & 0xFF000000) >> 24) / 255.0;
+} /* extract8888rev() */
+
+static void shove8888rev(const GLfloat shoveComponents[],
+			 int index,void *packedPixel)
+{
+   /* 00000000,00000000,00000000,11111111 == 0x000000ff */  
+   /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */  
+   /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */  
+   /* 11111111,00000000,00000000,00000000 == 0xff000000 */  
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+   assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLuint *)packedPixel)[index] = 
+     ((GLuint)((shoveComponents[0] * 255)+0.5)      ) & 0x000000FF;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[1] * 255)+0.5) <<  8) & 0x0000FF00;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[2] * 255)+0.5) << 16) & 0x00FF0000;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[3] * 255)+0.5) << 24) & 0xFF000000;
+} /* shove8888rev() */
+
+static void extract1010102(int isSwap,
+			   const void *packedPixel,GLfloat extractComponents[])
+{
+   GLuint uint;
+
+   if (isSwap) {
+     uint= __GLU_SWAP_4_BYTES(packedPixel);
+   }
+   else {
+     uint= *(const GLuint *)packedPixel;
+   }
+
+   /* 11111111,11000000,00000000,00000000 == 0xffc00000 */  
+   /* 00000000,00111111,11110000,00000000 == 0x003ff000 */  
+   /* 00000000,00000000,00001111,11111100 == 0x00000ffc */  
+   /* 00000000,00000000,00000000,00000011 == 0x00000003 */  
+
+   /* 1023 = 2^10-1 */
+   extractComponents[0]= (float)((uint & 0xffc00000) >> 22) / 1023.0; 
+   extractComponents[1]= (float)((uint & 0x003ff000) >> 12) / 1023.0;
+   extractComponents[2]= (float)((uint & 0x00000ffc) >>  2) / 1023.0;
+   extractComponents[3]= (float)((uint & 0x00000003)      ) / 3.0;
+} /* extract1010102() */
+
+static void shove1010102(const GLfloat shoveComponents[],
+			 int index,void *packedPixel)
+{
+   /* 11111111,11000000,00000000,00000000 == 0xffc00000 */  
+   /* 00000000,00111111,11110000,00000000 == 0x003ff000 */  
+   /* 00000000,00000000,00001111,11111100 == 0x00000ffc */  
+   /* 00000000,00000000,00000000,00000011 == 0x00000003 */  
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+   assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLuint *)packedPixel)[index] = 
+     ((GLuint)((shoveComponents[0] * 1023)+0.5) << 22) & 0xffc00000;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[1] * 1023)+0.5) << 12) & 0x003ff000;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[2] * 1023)+0.5) <<  2) & 0x00000ffc;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[3] * 3)+0.5)         ) & 0x00000003;
+} /* shove1010102() */ 
+
+static void extract2101010rev(int isSwap,
+			      const void *packedPixel,
+			      GLfloat extractComponents[])
+{
+   GLuint uint;
+
+   if (isSwap) {
+     uint= __GLU_SWAP_4_BYTES(packedPixel);
+   }
+   else {
+     uint= *(const GLuint *)packedPixel;
+   }
+
+   /* 00000000,00000000,00000011,11111111 == 0x000003FF */  
+   /* 00000000,00001111,11111100,00000000 == 0x000FFC00 */  
+   /* 00111111,11110000,00000000,00000000 == 0x3FF00000 */  
+   /* 11000000,00000000,00000000,00000000 == 0xC0000000 */  
+
+   /* 1023 = 2^10-1 */
+   extractComponents[0]= (float)((uint & 0x000003FF)      ) / 1023.0;  
+   extractComponents[1]= (float)((uint & 0x000FFC00) >> 10) / 1023.0;
+   extractComponents[2]= (float)((uint & 0x3FF00000) >> 20) / 1023.0;
+   extractComponents[3]= (float)((uint & 0xC0000000) >> 30) / 3.0;  
+   /* 3 = 2^2-1 */
+} /* extract2101010rev() */
+
+static void shove2101010rev(const GLfloat shoveComponents[],
+			    int index,void *packedPixel)
+{
+   /* 00000000,00000000,00000011,11111111 == 0x000003FF */  
+   /* 00000000,00001111,11111100,00000000 == 0x000FFC00 */  
+   /* 00111111,11110000,00000000,00000000 == 0x3FF00000 */  
+   /* 11000000,00000000,00000000,00000000 == 0xC0000000 */  
+
+   assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
+   assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
+   assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
+   assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
+
+   /* due to limited precision, need to round before shoving */
+   ((GLuint *)packedPixel)[index] = 
+     ((GLuint)((shoveComponents[0] * 1023)+0.5)      ) & 0x000003FF;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[1] * 1023)+0.5) << 10) & 0x000FFC00;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[2] * 1023)+0.5) << 20) & 0x3FF00000;
+   ((GLuint *)packedPixel)[index]|= 
+     ((GLuint)((shoveComponents[3] * 3)+0.5)    << 30) & 0xC0000000;
+} /* shove2101010rev() */
+
+static void scaleInternalPackedPixel(int components,
+				     void (*extractPackedPixel)
+				     (int, const void *,GLfloat []),
+				     void (*shovePackedPixel)
+				     (const GLfloat [], int, void *),
+				     GLint widthIn,GLint heightIn, 
+				     const void *dataIn,
+				     GLint widthOut,GLint heightOut,
+				     void *dataOut,
+				     GLint pixelSizeInBytes,
+				     GLint rowSizeInBytes,GLint isSwap)
+{
+    float x, convx;
+    float y, convy;
+    float percent;
+
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float extractTotals[4], extractMoreTotals[4], shoveTotals[4];
+
+    float area;
+    int i,j,k,xindex;
+
+    const char *temp, *temp0;
+    const char *temp_index;
+    int outindex;
+
+    int lowx_int, highx_int, lowy_int, highy_int;
+    float x_percent, y_percent;
+    float lowx_float, highx_float, lowy_float, highy_float;
+    float convy_float, convx_float;
+    int convy_int, convx_int;
+    int l, m;
+    const char *left, *right;
+
+    if (widthIn == widthOut*2 && heightIn == heightOut*2) {
+	halveImagePackedPixel(components,extractPackedPixel,shovePackedPixel,
+			      widthIn, heightIn, dataIn, dataOut,
+			      pixelSizeInBytes,rowSizeInBytes,isSwap);
+	return;
+    }
+    convy = (float) heightIn/heightOut;
+    convx = (float) widthIn/widthOut;
+    convy_int = floor(convy);
+    convy_float = convy - convy_int;
+    convx_int = floor(convx);
+    convx_float = convx - convx_int;
+   
+    area = convx * convy;
+
+    lowy_int = 0;
+    lowy_float = 0;
+    highy_int = convy_int;
+    highy_float = convy_float;
+
+    for (i = 0; i < heightOut; i++) {
+	lowx_int = 0;
+	lowx_float = 0;
+	highx_int = convx_int;
+	highx_float = convx_float;
+
+	for (j = 0; j < widthOut; j++) {
+	    /*
+	    ** Ok, now apply box filter to box that goes from (lowx, lowy)
+	    ** to (highx, highy) on input data into this pixel on output
+	    ** data.
+	    */
+	    totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+
+	    /* calculate the value for pixels in the 1st row */
+	    xindex = lowx_int*pixelSizeInBytes;
+	    if((highy_int>lowy_int) && (highx_int>lowx_int)) {
+
+		y_percent = 1-lowy_float;
+	    	temp = (const char *)dataIn + xindex + lowy_int * rowSizeInBytes;
+		percent = y_percent * (1-lowx_float);
+#if 0
+	      	for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+		    if (myswap_bytes) {
+			totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+		    } else {
+		        totals[k] += *(const GLushort*)temp_index * percent;
+		    }
+	        }
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * percent;
+		} 
+#endif
+		left = temp;
+	    	for(l = lowx_int+1; l < highx_int; l++) {
+		    temp += pixelSizeInBytes;
+#if 0
+		    for (k = 0, temp_index = temp; k < components; 
+			 k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+                                 __GLU_SWAP_2_BYTES(temp_index) * y_percent;
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index * y_percent;
+                        }
+		    }
+#else
+		    (*extractPackedPixel)(isSwap,temp,extractTotals);
+		    for (k = 0; k < components; k++) {
+		       totals[k]+= extractTotals[k] * y_percent;
+		    } 
+#endif
+	        }
+		temp += pixelSizeInBytes;
+		right = temp;
+		percent = y_percent * highx_float;
+#if 0
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * percent;
+		} 
+#endif
+
+		/* calculate the value for pixels in the last row */
+		
+		y_percent = highy_float;
+		percent = y_percent * (1-lowx_float);
+		temp = (const char *)dataIn + xindex + highy_int * rowSizeInBytes;
+#if 0
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * percent;
+		} 
+#endif
+		for(l = lowx_int+1; l < highx_int; l++) {
+                    temp += pixelSizeInBytes;
+#if 0
+                    for (k = 0, temp_index = temp; k < components; 
+			 k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+                                 __GLU_SWAP_2_BYTES(temp_index) * y_percent;
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index * y_percent;
+                        }
+                    }
+#else
+		    (*extractPackedPixel)(isSwap,temp,extractTotals);
+		    for (k = 0; k < components; k++) {
+		       totals[k]+= extractTotals[k] * y_percent;
+		    } 
+#endif
+
+                }
+                temp += pixelSizeInBytes;
+		percent = y_percent * highx_float;
+#if 0
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * percent;
+		} 
+#endif
+
+		/* calculate the value for pixels in the 1st and last column */
+		for(m = lowy_int+1; m < highy_int; m++) {
+		    left += rowSizeInBytes;
+		    right += rowSizeInBytes;
+#if 0
+                    for (k = 0; k < components; 
+		         k++, left += element_size, right += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+		 	        __GLU_SWAP_2_BYTES(left) * (1-lowx_float) +
+			        __GLU_SWAP_2_BYTES(right) * highx_float;
+                        } else {
+                            totals[k] += *(const GLushort*)left * (1-lowx_float)
+                                       + *(const GLushort*)right * highx_float;
+                        }
+		    }
+#else
+		    (*extractPackedPixel)(isSwap,left,extractTotals);
+		    (*extractPackedPixel)(isSwap,right,extractMoreTotals);
+		    for (k = 0; k < components; k++) {
+		       totals[k]+= (extractTotals[k]*(1-lowx_float) +
+			           extractMoreTotals[k]*highx_float);
+		    }
+#endif
+		}
+	    } else if (highy_int > lowy_int) {
+		x_percent = highx_float - lowx_float;
+		percent = (1-lowy_float)*x_percent;
+		temp = (const char *)dataIn + xindex + lowy_int*rowSizeInBytes;
+#if 0
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+	        }
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * percent;
+		} 
+#endif
+		for(m = lowy_int+1; m < highy_int; m++) {
+		    temp += rowSizeInBytes;
+#if 0
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+				__GLU_SWAP_2_BYTES(temp_index) * x_percent;
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index * x_percent;
+                        }
+		    }
+#else
+		    (*extractPackedPixel)(isSwap,temp,extractTotals);
+		    for (k = 0; k < components; k++) {
+		       totals[k]+= extractTotals[k] * x_percent;
+		    } 
+#endif
+		}
+		percent = x_percent * highy_float;
+		temp += rowSizeInBytes;
+#if 0
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * percent;
+		} 
+#endif
+	    } else if (highx_int > lowx_int) {
+		y_percent = highy_float - lowy_float;
+		percent = (1-lowx_float)*y_percent;
+		temp = (const char *)dataIn + xindex + lowy_int*rowSizeInBytes;
+#if 0
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * percent;
+		} 
+#endif
+		for (l = lowx_int+1; l < highx_int; l++) {
+                    temp += pixelSizeInBytes;
+#if 0
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += 
+			        __GLU_SWAP_2_BYTES(temp_index) * y_percent;
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index * y_percent;
+                        }
+		    }
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * y_percent;
+		} 
+#endif
+		}
+		temp += pixelSizeInBytes;
+		percent = y_percent * highx_float;
+#if 0
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+		}
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * percent;
+		} 
+#endif
+	    } else {
+		percent = (highy_float-lowy_float)*(highx_float-lowx_float);
+		temp = (const char *)dataIn + xindex + lowy_int * rowSizeInBytes;
+#if 0
+                for (k = 0, temp_index = temp; k < components; 
+		     k++, temp_index += element_size) {
+                    if (myswap_bytes) {
+                        totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
+                    } else {
+                        totals[k] += *(const GLushort*)temp_index * percent;
+                    }
+                }
+#else
+		(*extractPackedPixel)(isSwap,temp,extractTotals);
+		for (k = 0; k < components; k++) {
+		   totals[k]+= extractTotals[k] * percent;
+		} 
+#endif
+	    }
+
+	    /* this is for the pixels in the body */
+	    temp0 = (const char *)dataIn + xindex + pixelSizeInBytes + (lowy_int+1)*rowSizeInBytes;
+	    for (m = lowy_int+1; m < highy_int; m++) {
+		temp = temp0;
+		for(l = lowx_int+1; l < highx_int; l++) {
+#if 0
+                    for (k = 0, temp_index = temp; k < components; 
+		         k++, temp_index += element_size) {
+                        if (myswap_bytes) {
+                            totals[k] += __GLU_SWAP_2_BYTES(temp_index);
+                        } else {
+                            totals[k] += *(const GLushort*)temp_index;
+                        }
+                    }
+#else
+		    (*extractPackedPixel)(isSwap,temp,extractTotals);
+		    for (k = 0; k < components; k++) {
+		       totals[k]+= extractTotals[k];
+		    } 
+#endif
+                    temp += pixelSizeInBytes;
+                }
+	    	temp0 += rowSizeInBytes;
+	    }
+
+	    outindex = (j + (i * widthOut)); /* * (components == 1) */
+#if 0
+	    for (k = 0; k < components; k++) {
+		dataout[outindex + k] = totals[k]/area;
+		/*printf("totals[%d] = %f\n", k, totals[k]);*/
+	    }
+#else
+	    for (k = 0; k < components; k++) {
+	        shoveTotals[k]= totals[k]/area;
+	    }
+	    (*shovePackedPixel)(shoveTotals,outindex,(void *)dataOut);
+#endif
+	    lowx_int = highx_int;
+	    lowx_float = highx_float;
+	    highx_int += convx_int;
+ 	    highx_float += convx_float;
+	    if(highx_float > 1) {
+		highx_float -= 1.0;
+		highx_int++;
+	    }
+	}
+	lowy_int = highy_int;
+	lowy_float = highy_float;
+	highy_int += convy_int;
+	highy_float += convy_float;
+	if(highy_float > 1) {
+	    highy_float -= 1.0;
+	    highy_int++;
+	}
+    }
+
+    assert(outindex == (widthOut*heightOut - 1));
+} /* scaleInternalPackedPixel() */
+
+/* rowSizeInBytes is at least the width (in bytes) due to padding on 
+ *  inputs; not always equal. Output NEVER has row padding.  
+ */
+static void halveImagePackedPixel(int components,
+				  void (*extractPackedPixel)
+				  (int, const void *,GLfloat []),
+				  void (*shovePackedPixel)
+				  (const GLfloat [],int, void *),
+				  GLint width, GLint height, 
+				  const void *dataIn, void *dataOut,
+				  GLint pixelSizeInBytes, 
+				  GLint rowSizeInBytes, GLint isSwap)
+{
+   /* handle case where there is only 1 column/row */
+   if (width == 1 || height == 1) {
+      assert(!(width == 1 && height == 1)); /* can't be 1x1 */
+      halve1DimagePackedPixel(components,extractPackedPixel,shovePackedPixel,
+			      width,height,dataIn,dataOut,pixelSizeInBytes,
+			      rowSizeInBytes,isSwap);
+      return;
+   }
+
+   {
+      int ii, jj;
+
+      int halfWidth= width / 2;
+      int halfHeight= height / 2;
+      const char *src= (const char *) dataIn;
+      int padBytes= rowSizeInBytes - (width*pixelSizeInBytes);
+      int outIndex= 0;
+
+      for (ii= 0; ii< halfHeight; ii++) {
+	 for (jj= 0; jj< halfWidth; jj++) {
+#define BOX4 4
+	    float totals[4];	/* 4 is maximum components */
+	    float extractTotals[BOX4][4]; /* 4 is maximum components */
+	    int cc;
+
+	    (*extractPackedPixel)(isSwap,src,
+				  &extractTotals[0][0]);
+	    (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes),
+				  &extractTotals[1][0]);
+	    (*extractPackedPixel)(isSwap,(src+rowSizeInBytes),
+				  &extractTotals[2][0]);
+	    (*extractPackedPixel)(isSwap,
+				  (src+rowSizeInBytes+pixelSizeInBytes),
+				  &extractTotals[3][0]);
+	    for (cc = 0; cc < components; cc++) { 
+	       int kk;
+
+	       /* grab 4 pixels to average */
+	       totals[cc]= 0.0;
+	       /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
+		*              extractTotals[2][RED]+extractTotals[3][RED];
+		* totals[RED]/= 4.0;
+		*/
+	       for (kk = 0; kk < BOX4; kk++) {
+		  totals[cc]+= extractTotals[kk][cc];
+	       }
+	       totals[cc]/= (float)BOX4;
+	    }
+	    (*shovePackedPixel)(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 is at beginning of a row here, but it's the second row of
+	  * the square block of 4 pixels that we just worked on so we
+	  * need to go one more row.  
+	  * i.e.,             
+	  *                   OO... 
+	  *           here -->OO...
+	  *       but want -->OO...
+	  *                   OO... 
+	  *                   ...
+	  */
+	 src+= rowSizeInBytes;
+      }
+
+      /* both pointers must reach one byte after the end */
+      assert(src == &((const char *)dataIn)[rowSizeInBytes*height]);
+      assert(outIndex == halfWidth * halfHeight);
+   }
+} /* halveImagePackedPixel() */
+
+static void halve1DimagePackedPixel(int components,
+				    void (*extractPackedPixel)
+				    (int, const void *,GLfloat []),
+				    void (*shovePackedPixel)
+				    (const GLfloat [],int, void *),
+				    GLint width, GLint height, 
+				    const void *dataIn, void *dataOut,
+				    GLint pixelSizeInBytes, 
+				    GLint rowSizeInBytes, GLint isSwap)
+{
+   int halfWidth= width / 2;
+   int halfHeight= height / 2;
+   const char *src= (const char *) dataIn;
+   int jj;
+
+   assert(width == 1 || height == 1); /* must be 1D */
+   assert(width != height);	/* can't be square */
+
+   if (height == 1) {	/* 1 row */
+      int outIndex= 0;
+
+      assert(width != 1);	/* widthxheight can't be 1x1 */
+      halfHeight= 1;
+
+      /* one horizontal row with possible pad bytes */
+
+      for (jj= 0; jj< halfWidth; jj++) {
+#define BOX2 2
+	 float totals[4];	/* 4 is maximum components */
+	 float extractTotals[BOX2][4]; /* 4 is maximum components */
+	 int cc;
+
+	 /* average two at a time, instead of four */
+	 (*extractPackedPixel)(isSwap,src,
+			       &extractTotals[0][0]);
+	 (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes),
+			       &extractTotals[1][0]);			       
+	 for (cc = 0; cc < components; cc++) { 
+	    int kk;
+
+	    /* grab 2 pixels to average */
+	    totals[cc]= 0.0;
+	    /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
+	     * totals[RED]/= 2.0;
+	     */
+	    for (kk = 0; kk < BOX2; kk++) {
+	       totals[cc]+= extractTotals[kk][cc];
+	    }
+	    totals[cc]/= (float)BOX2;
+	 }
+	 (*shovePackedPixel)(totals,outIndex,dataOut);
+
+	 outIndex++;
+	 /* skip over to next group of 2 */
+	 src+= pixelSizeInBytes + pixelSizeInBytes;
+      }
+
+      {
+	 int padBytes= rowSizeInBytes - (width*pixelSizeInBytes); 
+	 src+= padBytes;	/* for assertion only */
+      }
+      assert(src == &((const char *)dataIn)[rowSizeInBytes]);
+      assert(outIndex == halfWidth * halfHeight);
+   }
+   else if (width == 1) { /* 1 column */
+      int outIndex= 0;
+
+      assert(height != 1);	/* widthxheight can't be 1x1 */
+      halfWidth= 1;
+      /* one vertical column with possible pad bytes per row */
+      /* average two at a time */
+
+      for (jj= 0; jj< halfHeight; jj++) {
+#define BOX2 2
+	 float totals[4];	/* 4 is maximum components */
+	 float extractTotals[BOX2][4]; /* 4 is maximum components */
+	 int cc;
+
+	 /* average two at a time, instead of four */
+	 (*extractPackedPixel)(isSwap,src,
+			       &extractTotals[0][0]);
+	 (*extractPackedPixel)(isSwap,(src+rowSizeInBytes),
+			       &extractTotals[1][0]);			       
+	 for (cc = 0; cc < components; cc++) { 
+	    int kk;
+
+	    /* grab 2 pixels to average */
+	    totals[cc]= 0.0;
+	    /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
+	     * totals[RED]/= 2.0;
+	     */
+	    for (kk = 0; kk < BOX2; kk++) {
+	       totals[cc]+= extractTotals[kk][cc];
+	    }
+	    totals[cc]/= (float)BOX2;
+	 }
+	 (*shovePackedPixel)(totals,outIndex,dataOut);
+
+	 outIndex++;
+	 src+= rowSizeInBytes + rowSizeInBytes; /* go to row after next */
+      }
+
+      assert(src == &((const char *)dataIn)[rowSizeInBytes*height]);
+      assert(outIndex == halfWidth * halfHeight);
+   }
+} /* halve1DimagePackedPixel() */
+
+/*===========================================================================*/
+
+static GLint imageSize3D(GLint width, GLint height, GLint depth,
+			 GLenum format, GLenum type) 
+{
+    int components= elements_per_group(format,type);
+    int bytes_per_row=  bytes_per_element(type) * width;
+
+assert(width > 0 && height > 0 && depth > 0);
+assert(type != GL_BITMAP);
+
+    return bytes_per_row * height * depth * components;
+} /* imageSize3D() */
+
+static void fillImage3D(const PixelStorageModes *psm, 
+			GLint width, GLint height, GLint depth, GLenum format, 
+			GLenum type, GLboolean indexFormat, 
+			const void *userImage, GLushort *newImage)
+{
+   int myswapBytes;
+   int components;
+   int groupsPerLine;
+   int elementSize;
+   int groupSize;
+   int rowSize;
+   int padding;
+   int elementsPerLine;
+   int rowsPerImage;
+   int imageSize;
+   const GLubyte *start, *rowStart, *iter; 
+   GLushort *iter2;
+   int ww, hh, dd, k; 
+   
+   myswapBytes= psm->unpack_swap_bytes;
+   components= elements_per_group(format,type);
+   if (psm->unpack_row_length > 0) {
+      groupsPerLine= psm->unpack_row_length;
+   }
+   else {
+      groupsPerLine= width;
+   }
+   elementSize= bytes_per_element(type);
+   groupSize= elementSize * components;
+   if (elementSize == 1) myswapBytes= 0;
+
+   /* 3dstuff begin */
+   if (psm->unpack_image_height > 0) { 
+      rowsPerImage= psm->unpack_image_height; 
+   }
+   else {
+      rowsPerImage= height;
+   }
+   /* 3dstuff end */
+
+   rowSize= groupsPerLine * groupSize;
+   padding= rowSize % psm->unpack_alignment;
+   if (padding) {
+      rowSize+= psm->unpack_alignment - padding;
+   }
+
+   imageSize= rowsPerImage * rowSize; /* 3dstuff */
+
+   start= (const GLubyte *)userImage + psm->unpack_skip_rows * rowSize + 
+                                 psm->unpack_skip_pixels * groupSize +
+                                 /*3dstuff*/
+                                 psm->unpack_skip_images * imageSize;
+   elementsPerLine = width * components;
+
+   iter2= newImage;
+   for (dd= 0; dd < depth; dd++) {
+      rowStart= start;
+
+      for (hh= 0; hh < height; hh++) {
+	 iter= rowStart;
+
+	 for (ww= 0; ww < elementsPerLine; ww++) {
+	    Type_Widget widget;
+	    float extractComponents[4];
+
+	    switch(type) {
+	    case GL_UNSIGNED_BYTE:
+	      if (indexFormat) {
+		  *iter2++ = *iter;
+	      } else {
+		  *iter2++ = (*iter) * 257;
+	      }
+	      break;
+	    case GL_BYTE:
+	      if (indexFormat) {
+		  *iter2++ = *((const GLbyte *) iter);
+	      } else {
+		  /* rough approx */
+		  *iter2++ = (*((const GLbyte *) iter)) * 516;
+	      }
+	      break;
+	    case GL_UNSIGNED_BYTE_3_3_2:
+	      extract332(0,iter,extractComponents);
+	      for (k = 0; k < 3; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_BYTE_2_3_3_REV:  
+	      extract233rev(0,iter,extractComponents);
+	      for (k = 0; k < 3; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_5_6_5:               		    
+	      extract565(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 3; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_5_6_5_REV:            		    
+	      extract565rev(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 3; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_4_4_4_4:		    
+	      extract4444(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 4; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_4_4_4_4_REV:		    
+	      extract4444rev(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 4; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_5_5_5_1:		    
+	      extract5551(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 4; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	      extract1555rev(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 4; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT:
+	    case GL_SHORT:
+	      if (myswapBytes) {
+		  widget.ub[0] = iter[1];
+		  widget.ub[1] = iter[0];
+	      } else {
+		  widget.ub[0] = iter[0];
+		  widget.ub[1] = iter[1];
+	      }
+	      if (type == GL_SHORT) {
+		  if (indexFormat) {
+		      *iter2++ = widget.s[0];
+		  } else {
+		      /* rough approx */
+		      *iter2++ = widget.s[0]*2;
+		  }
+	      } else {
+		  *iter2++ = widget.us[0];
+	      }
+	      break;
+	    case GL_UNSIGNED_INT_8_8_8_8:		    
+	      extract8888(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 4; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_INT_8_8_8_8_REV:		    
+	      extract8888rev(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 4; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_INT_10_10_10_2:		    
+	      extract1010102(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 4; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_UNSIGNED_INT_2_10_10_10_REV:
+	      extract2101010rev(myswapBytes,iter,extractComponents);
+	      for (k = 0; k < 4; k++) {
+		*iter2++ = (GLushort)(extractComponents[k]*65535);
+	      }
+	      break;
+	    case GL_INT:
+	    case GL_UNSIGNED_INT:
+	    case GL_FLOAT:
+	      if (myswapBytes) {
+		  widget.ub[0] = iter[3];
+		  widget.ub[1] = iter[2];
+		  widget.ub[2] = iter[1];
+		  widget.ub[3] = iter[0];
+	      } else {
+		  widget.ub[0] = iter[0];
+		  widget.ub[1] = iter[1];
+		  widget.ub[2] = iter[2];
+		  widget.ub[3] = iter[3];
+	      }
+	      if (type == GL_FLOAT) {
+		  if (indexFormat) {
+		      *iter2++ = widget.f;
+		  } else {
+		      *iter2++ = 65535 * widget.f;
+		  }
+	      } else if (type == GL_UNSIGNED_INT) {
+		  if (indexFormat) {
+		      *iter2++ = widget.ui;
+		  } else {
+		      *iter2++ = widget.ui >> 16;
+		  }
+	      } else {
+		  if (indexFormat) {
+		      *iter2++ = widget.i;
+		  } else {
+		      *iter2++ = widget.i >> 15;
+		  }
+	      }
+	      break;
+            default:
+ 	      assert(0);
+	    }
+
+	    iter+= elementSize;
+	 } /* for ww */
+	 rowStart+= rowSize;
+
+	 iter= rowStart;	/* for assertion purposes */
+      } /* for hh */
+
+      start+= imageSize;
+   } /* for dd */
+
+   /* iterators should be one byte past end */
+   if (!isTypePackedPixel(type)) {
+      assert(iter2 == &newImage[width*height*depth*components]);
+   }
+   else {
+      assert(iter2 == &newImage[width*height*depth*
+				elements_per_group(format,0)]);
+   }
+   assert( iter == &((const GLubyte *)userImage)[rowSize*height*depth +
+					psm->unpack_skip_rows * rowSize + 
+					psm->unpack_skip_pixels * groupSize +
+					/*3dstuff*/
+					psm->unpack_skip_images * imageSize] );
+} /* fillImage3D () */
+
+static void scaleInternal3D(GLint components, 
+			    GLint widthIn, GLint heightIn, GLint depthIn,
+			    const GLushort *dataIn,
+			    GLint widthOut, GLint heightOut, GLint depthOut,
+			    GLushort *dataOut)
+{
+    float x, lowx, highx, convx, halfconvx;
+    float y, lowy, highy, convy, halfconvy;
+    float z, lowz, highz, convz, halfconvz;
+    float xpercent,ypercent,zpercent; 
+    float percent;
+    /* Max components in a format is 4, so... */
+    float totals[4];
+    float volume;
+    int i,j,d,k,zint,yint,xint,xindex,yindex,zindex;
+    int temp;
+
+    convz = (float) depthIn/depthOut;
+    convy = (float) heightIn/heightOut;
+    convx = (float) widthIn/widthOut;
+    halfconvx = convx/2;
+    halfconvy = convy/2;
+    halfconvz = convz/2;
+    for (d = 0; d < depthOut; d++) { 
+       z = convz * (d+0.5);
+       if (depthIn > depthOut) {
+	   highz = z + halfconvz;
+	   lowz = z - halfconvz;
+       } else {
+	   highz = z + 0.5;
+	   lowz = z - 0.5;
+       }
+       for (i = 0; i < heightOut; i++) {
+	   y = convy * (i+0.5);
+	   if (heightIn > heightOut) {
+	       highy = y + halfconvy;
+	       lowy = y - halfconvy;
+	   } else {
+	       highy = y + 0.5;
+	       lowy = y - 0.5;
+	   }
+	   for (j = 0; j < widthOut; j++) {
+	       x = convx * (j+0.5);
+	       if (widthIn > widthOut) {
+		   highx = x + halfconvx;
+		   lowx = x - halfconvx;
+	       } else {
+		   highx = x + 0.5;
+		   lowx = x - 0.5;
+	       }
+
+	       /*
+	       ** Ok, now apply box filter to box that goes from (lowx, lowy,
+	       ** lowz) to (highx, highy, highz) on input data into this pixel
+	       ** on output data.
+	       */
+	       totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
+	       volume = 0.0;
+
+	       z = lowz;
+	       zint = floor(z);
+	       while (z < highz) {
+		  zindex = (zint + depthIn) % depthIn;
+		  if (highz < zint+1) {
+		      zpercent = highz - z;
+		  } else {
+		      zpercent = zint+1 - z;
+		  }
+
+		  y = lowy;
+		  yint = floor(y);
+		  while (y < highy) {
+		      yindex = (yint + heightIn) % heightIn;
+		      if (highy < yint+1) {
+			  ypercent = highy - y;
+		      } else {
+			  ypercent = yint+1 - y;
+		      }
+
+		      x = lowx;
+		      xint = floor(x);
+
+		      while (x < highx) {
+			  xindex = (xint + widthIn) % widthIn;
+			  if (highx < xint+1) {
+			      xpercent = highx - x;
+			  } else {
+			      xpercent = xint+1 - x;
+			  }
+
+			  percent = xpercent * ypercent * zpercent;
+			  volume += percent;
+
+			  temp = (xindex + (yindex*widthIn) + 
+				  (zindex*widthIn*heightIn)) * components;
+			  for (k = 0; k < components; k++) {
+			      assert(0 <= (temp+k) && 
+				     (temp+k) < 
+				     (widthIn*heightIn*depthIn*components));
+			      totals[k] += dataIn[temp + k] * percent;
+			  }
+
+			  xint++;
+			  x = xint;
+		      } /* while x */
+
+		      yint++;
+		      y = yint;
+		  } /* while y */
+
+		  zint++;
+		  z = zint;
+	       } /* while z */
+
+	       temp = (j + (i * widthOut) + 
+		       (d*widthOut*heightOut)) * components;
+	       for (k = 0; k < components; k++) {
+		   /* totals[] should be rounded in the case of enlarging an 
+		    * RGB ramp when the type is 332 or 4444
+		    */
+		   assert(0 <= (temp+k) && 
+			  (temp+k) < (widthOut*heightOut*depthOut*components));
+		   dataOut[temp + k] = (totals[k]+0.5)/volume;
+	       }
+	   } /* for j */
+       } /* for i */
+    } /* for d */
+} /* scaleInternal3D() */
+
+static void emptyImage3D(const PixelStorageModes *psm,
+			 GLint width, GLint height, GLint depth,
+			 GLenum format, GLenum type, GLboolean indexFormat,
+			 const GLushort *oldImage, void *userImage)
+{
+   int myswapBytes;
+   int components;
+   int groupsPerLine;
+   int elementSize;
+   int groupSize;
+   int rowSize;
+   int padding;
+   GLubyte *start, *rowStart, *iter;
+   int elementsPerLine;
+   const GLushort *iter2;
+   int ii, jj, dd, k;
+   int rowsPerImage;
+   int imageSize;
+
+   myswapBytes= psm->pack_swap_bytes;
+   components = elements_per_group(format,type);
+   if (psm->pack_row_length > 0) {
+      groupsPerLine = psm->pack_row_length;
+   }
+   else {
+      groupsPerLine = width;
+   }
+
+   elementSize= bytes_per_element(type);
+   groupSize= elementSize * components;
+   if (elementSize == 1) myswapBytes= 0;
+   
+   /* 3dstuff begin */
+   if (psm->pack_image_height > 0) {
+      rowsPerImage= psm->pack_image_height;
+   }
+   else {
+      rowsPerImage= height;
+   }
+
+   /* 3dstuff end */   
+
+   rowSize = groupsPerLine * groupSize;
+   padding = rowSize % psm->pack_alignment;
+   if (padding) {
+      rowSize+= psm->pack_alignment - padding;
+   }
+   
+   imageSize= rowsPerImage * rowSize; /* 3dstuff */
+
+   start = (GLubyte *)userImage + psm->pack_skip_rows * rowSize +
+                                  psm->pack_skip_pixels * groupSize +
+                                  /*3dstuff*/
+                                  psm->pack_skip_images * imageSize;
+   elementsPerLine= width * components;
+
+   iter2 = oldImage;
+   for (dd= 0; dd < depth; dd++) { 
+      rowStart= start;
+
+      for (ii= 0; ii< height; ii++) {
+	 iter = rowStart;
+
+	 for (jj = 0; jj < elementsPerLine; jj++) {
+	    Type_Widget widget;
+	    float shoveComponents[4];
+
+	    switch(type){
+	    case GL_UNSIGNED_BYTE:
+	      if (indexFormat) {
+		  *iter = *iter2++;
+	      } else {
+		  *iter = *iter2++ >> 8;
+	      }
+	      break;
+	    case GL_BYTE:
+	      if (indexFormat) {
+		  *((GLbyte *) iter) = *iter2++;
+	      } else {
+		  *((GLbyte *) iter) = *iter2++ >> 9;
+	      }
+	      break;
+	    case GL_UNSIGNED_BYTE_3_3_2: 
+	      for (k = 0; k < 3; k++) {
+		 shoveComponents[k]= *iter2++ / 65535.0;
+	      } 
+	      shove332(shoveComponents,0,(void *)iter);
+	      break;
+	    case GL_UNSIGNED_BYTE_2_3_3_REV:
+	      for (k = 0; k < 3; k++) {
+		 shoveComponents[k]= *iter2++ / 65535.0;
+	      } 
+	      shove233rev(shoveComponents,0,(void *)iter);
+	      break; 
+	    case GL_UNSIGNED_SHORT_5_6_5:		    
+	      for (k = 0; k < 3; k++) {
+		 shoveComponents[k]= *iter2++ / 65535.0;
+	      } 
+	      shove565(shoveComponents,0,(void *)&widget.us[0]);
+	      if (myswapBytes) {
+		 iter[0] = widget.ub[1];
+		 iter[1] = widget.ub[0];
+	      }
+	      else {
+		 *(GLushort *)iter = widget.us[0];
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_5_6_5_REV:		    
+	      for (k = 0; k < 3; k++) {
+		 shoveComponents[k]= *iter2++ / 65535.0;
+	      } 
+	      shove565rev(shoveComponents,0,(void *)&widget.us[0]);
+	      if (myswapBytes) {
+		 iter[0] = widget.ub[1];
+		 iter[1] = widget.ub[0];
+	      }
+	      else {
+		 *(GLushort *)iter = widget.us[0];
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_4_4_4_4:
+	      for (k = 0; k < 4; k++) {
+		 shoveComponents[k]= *iter2++ / 65535.0;
+	      } 
+	      shove4444(shoveComponents,0,(void *)&widget.us[0]);
+	      if (myswapBytes) {
+		 iter[0] = widget.ub[1];
+		 iter[1] = widget.ub[0];
+	      } else {
+		 *(GLushort *)iter = widget.us[0];
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	      for (k = 0; k < 4; k++) {
+		 shoveComponents[k]= *iter2++ / 65535.0;
+	      } 
+	      shove4444rev(shoveComponents,0,(void *)&widget.us[0]);
+	      if (myswapBytes) {
+		 iter[0] = widget.ub[1];
+		 iter[1] = widget.ub[0];
+	      } else {
+		 *(GLushort *)iter = widget.us[0];
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_5_5_5_1:
+	      for (k = 0; k < 4; k++) {
+		 shoveComponents[k]= *iter2++ / 65535.0;
+	      } 
+	      shove5551(shoveComponents,0,(void *)&widget.us[0]);
+	      if (myswapBytes) {
+		 iter[0] = widget.ub[1];
+		 iter[1] = widget.ub[0];
+	      } else {
+		 *(GLushort *)iter = widget.us[0];
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	      for (k = 0; k < 4; k++) {
+		 shoveComponents[k]= *iter2++ / 65535.0;
+	      } 
+	      shove1555rev(shoveComponents,0,(void *)&widget.us[0]);
+	      if (myswapBytes) {
+		 iter[0] = widget.ub[1];
+		 iter[1] = widget.ub[0];
+	      } else {
+		 *(GLushort *)iter = widget.us[0];
+	      }
+	      break;
+	    case GL_UNSIGNED_SHORT:
+	    case GL_SHORT:
+	      if (type == GL_SHORT) {
+		  if (indexFormat) {
+		      widget.s[0] = *iter2++;
+		  } else {
+		      widget.s[0] = *iter2++ >> 1;
+		  }
+	      } else {
+		  widget.us[0] = *iter2++;
+	      }
+	      if (myswapBytes) {
+		  iter[0] = widget.ub[1];
+		  iter[1] = widget.ub[0];
+	      } else {
+		  iter[0] = widget.ub[0];
+		  iter[1] = widget.ub[1];
+	      }
+	      break;
+	    case GL_UNSIGNED_INT_8_8_8_8:
+	       for (k = 0; k < 4; k++) {
+		  shoveComponents[k]= *iter2++ / 65535.0;
+	       } 
+	       shove8888(shoveComponents,0,(void *)&widget.ui);
+	       if (myswapBytes) {
+		   iter[3] = widget.ub[0];
+		   iter[2] = widget.ub[1];
+		   iter[1] = widget.ub[2];
+		   iter[0] = widget.ub[3];
+	       } else {
+		   *(GLuint *)iter= widget.ui;
+	       }
+	       break;
+	    case GL_UNSIGNED_INT_8_8_8_8_REV:
+	       for (k = 0; k < 4; k++) {
+		  shoveComponents[k]= *iter2++ / 65535.0;
+	       } 
+	       shove8888rev(shoveComponents,0,(void *)&widget.ui);
+	       if (myswapBytes) {
+		   iter[3] = widget.ub[0];
+		   iter[2] = widget.ub[1];
+		   iter[1] = widget.ub[2];
+		   iter[0] = widget.ub[3];
+	       } else {
+		   *(GLuint *)iter= widget.ui;
+	       }
+	       break;
+	    case GL_UNSIGNED_INT_10_10_10_2:  
+	       for (k = 0; k < 4; k++) {
+		  shoveComponents[k]= *iter2++ / 65535.0;
+	       } 
+	       shove1010102(shoveComponents,0,(void *)&widget.ui);
+	       if (myswapBytes) {
+		   iter[3] = widget.ub[0];
+		   iter[2] = widget.ub[1];
+		   iter[1] = widget.ub[2];
+		   iter[0] = widget.ub[3];
+	       } else {
+		   *(GLuint *)iter= widget.ui;
+	       }
+	       break;
+	    case GL_UNSIGNED_INT_2_10_10_10_REV:  
+	       for (k = 0; k < 4; k++) {
+		  shoveComponents[k]= *iter2++ / 65535.0;
+	       } 
+	       shove2101010rev(shoveComponents,0,(void *)&widget.ui);
+	       if (myswapBytes) {
+		   iter[3] = widget.ub[0];
+		   iter[2] = widget.ub[1];
+		   iter[1] = widget.ub[2];
+		   iter[0] = widget.ub[3];
+	       } else {
+		   *(GLuint *)iter= widget.ui;
+	       }
+	       break;
+	    case GL_INT:
+	    case GL_UNSIGNED_INT:
+	    case GL_FLOAT:
+	      if (type == GL_FLOAT) {
+		  if (indexFormat) {
+		      widget.f = *iter2++;
+		  } else {
+		      widget.f = *iter2++ / (float) 65535.0;
+		  }
+	      } else if (type == GL_UNSIGNED_INT) {
+		  if (indexFormat) {
+		      widget.ui = *iter2++;
+		  } else {
+		      widget.ui = (unsigned int) *iter2++ * 65537;
+		  }
+	      } else {
+		  if (indexFormat) {
+		      widget.i = *iter2++;
+		  } else {
+		      widget.i = ((unsigned int) *iter2++ * 65537)/2;
+		  }
+	      }
+	      if (myswapBytes) {
+		  iter[3] = widget.ub[0];
+		  iter[2] = widget.ub[1];
+		  iter[1] = widget.ub[2];
+		  iter[0] = widget.ub[3];
+	      } else {
+		  iter[0] = widget.ub[0];
+		  iter[1] = widget.ub[1];
+		  iter[2] = widget.ub[2];
+		  iter[3] = widget.ub[3];
+	      }
+	      break;
+	    default:
+	       assert(0);
+	    }
+
+	    iter+= elementSize;
+	 }  /* for jj */
+
+	 rowStart+= rowSize;
+      } /* for ii */
+
+      start+= imageSize;
+   } /* for dd */
+
+   /* iterators should be one byte past end */
+   if (!isTypePackedPixel(type)) {
+      assert(iter2 == &oldImage[width*height*depth*components]);
+   }
+   else {
+      assert(iter2 == &oldImage[width*height*depth*
+				elements_per_group(format,0)]);
+   }
+   assert( iter == &((GLubyte *)userImage)[rowSize*height*depth +
+					psm->unpack_skip_rows * rowSize + 
+					psm->unpack_skip_pixels * groupSize +
+					/*3dstuff*/
+					psm->unpack_skip_images * imageSize] );
+} /* emptyImage3D() */
+
+int gluScaleImage3D(GLenum format, 
+		    GLint widthIn, GLint heightIn, GLint depthIn,
+		    GLenum typeIn, const void *dataIn, 
+		    GLint widthOut, GLint heightOut, GLint depthOut,
+		    GLenum typeOut, void *dataOut)
+{
+   int components;
+   GLushort *beforeImage, *afterImage;
+   PixelStorageModes psm;
+
+   if (widthIn == 0 || heightIn == 0 || depthIn == 0 || 
+       widthOut == 0 || heightOut == 0 || depthOut == 0) {
+      return 0;
+   }
+
+   if (widthIn < 0 || heightIn < 0 || depthIn < 0 || 
+       widthOut < 0 || heightOut < 0 || depthOut < 0) {
+      return GLU_INVALID_VALUE;
+   }
+      
+   if (!legalFormat(format) || !legalType(typeIn) || !legalType(typeOut) ||
+       typeIn == GL_BITMAP || typeOut == GL_BITMAP) {
+      return GLU_INVALID_ENUM;
+   }
+   if (!isLegalFormatForPackedPixelType(format, typeIn)) {
+      return GLU_INVALID_OPERATION;
+   }
+   if (!isLegalFormatForPackedPixelType(format, typeOut)) {
+      return GLU_INVALID_OPERATION;
+   }
+
+   beforeImage = malloc(imageSize3D(widthIn, heightIn, depthIn, format,
+				    GL_UNSIGNED_SHORT)); 
+   afterImage = malloc(imageSize3D(widthOut, heightOut, depthOut, format, 
+				   GL_UNSIGNED_SHORT));
+   if (beforeImage == NULL || afterImage == NULL) {
+       return GLU_OUT_OF_MEMORY;
+   } 
+   retrieveStoreModes3D(&psm);
+
+   fillImage3D(&psm,widthIn,heightIn,depthIn,format,typeIn, is_index(format),
+	       dataIn, beforeImage);
+   components = elements_per_group(format,0);
+   scaleInternal3D(components,widthIn,heightIn,depthIn,beforeImage,
+		   widthOut,heightOut,depthOut,afterImage);
+   emptyImage3D(&psm,widthOut,heightOut,depthOut,format,typeOut,
+		is_index(format),afterImage, dataOut);
+   free((void *) beforeImage);
+   free((void *) afterImage);
+
+   return 0;
+} /* gluScaleImage3D() */
+
+static void closestFit3D(GLenum target, GLint width, GLint height, GLint depth,
+			 GLint internalFormat, GLenum format, GLenum type, 
+			 GLint *newWidth, GLint *newHeight, GLint *newDepth)
+{
+   GLint widthPowerOf2= nearestPower(width);
+   GLint heightPowerOf2= nearestPower(height);   	
+   GLint depthPowerOf2= nearestPower(depth);
+   GLint proxyWidth;
+
+   do {
+      /* compute level 1 width & height & depth, clamping each at 1 */
+      GLint widthAtLevelOne= (widthPowerOf2 > 1) ?
+			      widthPowerOf2 >> 1 :
+			      widthPowerOf2;  
+      GLint heightAtLevelOne= (heightPowerOf2 > 1) ?
+			       heightPowerOf2 >> 1 :
+			       heightPowerOf2;  
+      GLint depthAtLevelOne= (depthPowerOf2 > 1) ?
+			      depthPowerOf2 >> 1 :
+			      depthPowerOf2;  
+      GLenum proxyTarget;
+      assert(widthAtLevelOne > 0); 
+      assert(heightAtLevelOne > 0);
+      assert(depthAtLevelOne > 0);
+
+      /* does width x height x depth at level 1 & all their mipmaps fit? */
+      if (target == GL_TEXTURE_3D || target == GL_PROXY_TEXTURE_3D) {
+	 proxyTarget = GL_PROXY_TEXTURE_3D;
+	 glTexImage3D(proxyTarget, 1, /* must be non-zero */
+		      internalFormat,
+		      widthAtLevelOne,heightAtLevelOne,depthAtLevelOne,
+		      0,format,type,NULL);
+      }
+      glGetTexLevelParameteriv(proxyTarget, 1,GL_TEXTURE_WIDTH,&proxyWidth);
+      /* does it fit??? */
+      if (proxyWidth == 0) { /* nope, so try again with these sizes */
+	 if (widthPowerOf2 == 1 && heightPowerOf2 == 1 &&
+	     depthPowerOf2 == 1) {
+	    *newWidth= *newHeight= *newDepth= 1; /* must fit 1x1x1 texture */
+	    return;
+	 }
+	 widthPowerOf2= widthAtLevelOne;
+	 heightPowerOf2= heightAtLevelOne;
+	 depthPowerOf2= depthAtLevelOne;
+      } 
+      /* else it does fit */
+   } while (proxyWidth == 0);
+   /* loop must terminate! */
+
+   /* return the width & height at level 0 that fits */
+   *newWidth= widthPowerOf2;
+   *newHeight= heightPowerOf2;
+   *newDepth= depthPowerOf2;
+/*printf("Proxy Textures\n");*/
+} /* closestFit3D() */
+
+static void halveImagePackedPixelSlice(int components,
+				       void (*extractPackedPixel)
+				       (int, const void *,GLfloat []),
+				       void (*shovePackedPixel)
+				       (const GLfloat [],int, void *),
+				       GLint width, GLint height, GLint depth,
+				       const void *dataIn, void *dataOut,
+				       GLint pixelSizeInBytes, 
+				       GLint rowSizeInBytes, 
+				       GLint imageSizeInBytes,
+				       GLint isSwap)
+{
+   int ii, jj;
+   int halfWidth= width / 2;
+   int halfHeight= height / 2;
+   int halfDepth= depth / 2;
+   const char *src= (const char *)dataIn;
+   int padBytes= rowSizeInBytes - (width * pixelSizeInBytes);
+   int outIndex= 0;
+
+   assert((width == 1 || height == 1) && depth >= 2);
+
+   if (width == height) {	/* a 1-pixel column viewed from top */
+      assert(width == 1 && height == 1);
+      assert(depth >= 2);
+
+      for (ii= 0; ii< halfDepth; ii++) {
+	 float totals[4];
+	 float extractTotals[BOX2][4];
+	 int cc;
+
+	 (*extractPackedPixel)(isSwap,src,&extractTotals[0][0]);
+	 (*extractPackedPixel)(isSwap,(src+imageSizeInBytes),
+			       &extractTotals[1][0]);
+	 for (cc = 0; cc < components; cc++) {
+	    int kk;
+
+	    /* average 2 pixels since only a column */
+	    totals[cc]= 0.0;
+	    /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
+	     * totals[RED]/= 2.0;
+	     */
+	    for (kk = 0; kk < BOX2; kk++) {
+	      totals[cc]+= extractTotals[kk][cc];
+	    }
+	    totals[cc]/= (float)BOX2;
+	 } /* for cc */
+	 
+	 (*shovePackedPixel)(totals,outIndex,dataOut);
+	 outIndex++;
+	 /* skip over to next group of 2 */
+	 src+= imageSizeInBytes + imageSizeInBytes;
+      } /* for ii */
+   }
+   else if (height == 1) {	/* horizontal slice viewed from top */
+      assert(width != 1);
+
+      for (ii= 0; ii< halfDepth; ii++) {
+	 for (jj= 0; jj< halfWidth; jj++) {
+	     float totals[4];
+	     float extractTotals[BOX4][4]; 
+	     int cc;
+
+	     (*extractPackedPixel)(isSwap,src,
+				   &extractTotals[0][0]);
+	     (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes),
+				   &extractTotals[1][0]);
+	     (*extractPackedPixel)(isSwap,(src+imageSizeInBytes),
+				   &extractTotals[2][0]);
+	     (*extractPackedPixel)(isSwap,
+				   (src+imageSizeInBytes+pixelSizeInBytes),
+				   &extractTotals[3][0]);
+	     for (cc = 0; cc < components; cc++) {
+	        int kk;
+
+		/* grab 4 pixels to average */
+		totals[cc]= 0.0;
+		/* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
+		 *              extractTotals[2][RED]+extractTotals[3][RED];
+		 * totals[RED]/= 4.0;
+		 */
+		for (kk = 0; kk < BOX4; kk++) {
+		   totals[cc]+= extractTotals[kk][cc];
+		}
+		totals[cc]/= (float)BOX4;
+	     }
+	     (*shovePackedPixel)(totals,outIndex,dataOut);
+
+	     outIndex++;
+	     /* skip over to next horizontal square of 4 */
+	     src+= imageSizeInBytes + imageSizeInBytes;
+	 }
+      }
+
+      /* assert() */
+   }
+   else if (width == 1) {	/* vertical slice viewed from top */
+      assert(height != 1);
+
+      for (ii= 0; ii< halfDepth; ii++) {
+	 for (jj= 0; jj< halfHeight; jj++) {
+	    float totals[4];
+	    float extractTotals[BOX4][4];
+	    int cc;
+
+	    (*extractPackedPixel)(isSwap,src,
+				  &extractTotals[0][0]);
+	    (*extractPackedPixel)(isSwap,(src+rowSizeInBytes),
+				  &extractTotals[1][0]);
+	    (*extractPackedPixel)(isSwap,(src+imageSizeInBytes),
+				  &extractTotals[2][0]);
+	    (*extractPackedPixel)(isSwap,
+				  (src+imageSizeInBytes+rowSizeInBytes),
+				  &extractTotals[3][0]);
+	    for (cc = 0; cc < components; cc++) {
+	       int kk;
+
+	       /* grab 4 pixels to average */
+	       totals[cc]= 0.0;
+	       /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
+		*              extractTotals[2][RED]+extractTotals[3][RED];
+		* totals[RED]/= 4.0;
+		*/
+	       for (kk = 0; kk < BOX4; kk++) {
+		  totals[cc]+= extractTotals[kk][cc];
+	       }
+	       totals[cc]/= (float)BOX4;
+	    }
+	    (*shovePackedPixel)(totals,outIndex,dataOut);
+
+	    outIndex++;
+
+	    /* skip over to next vertical square of 4 */
+	    src+= imageSizeInBytes + imageSizeInBytes;
+	 }
+      } 
+      /* assert() */
+   }
+
+} /* halveImagePackedPixelSlice() */
+
+static void halveImagePackedPixel3D(int components,
+				    void (*extractPackedPixel)
+				    (int, const void *,GLfloat []),
+				    void (*shovePackedPixel)
+				    (const GLfloat [],int, void *),
+				    GLint width, GLint height, GLint depth,
+				    const void *dataIn, void *dataOut,
+				    GLint pixelSizeInBytes, 
+				    GLint rowSizeInBytes, 
+				    GLint imageSizeInBytes,
+				    GLint isSwap)
+{
+   if (depth == 1) {
+      assert(1 <= width && 1 <= height);
+
+      halveImagePackedPixel(components,extractPackedPixel,shovePackedPixel,
+			    width,height,dataIn,dataOut,pixelSizeInBytes,
+			    rowSizeInBytes,isSwap);
+      return;
+   }
+   /* a horizontal or vertical slice viewed from top */
+   else if (width == 1 || height == 1) { 
+      assert(1 <= depth);
+
+      halveImagePackedPixelSlice(components,
+				 extractPackedPixel,shovePackedPixel,
+				 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;  
+      const char *src= (const char *) dataIn;
+      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++) {
+#define BOX8 8
+	       float totals[4];	/* 4 is maximum components */
+	       float extractTotals[BOX8][4]; /* 4 is maximum components */
+	       int cc;
+
+	       (*extractPackedPixel)(isSwap,src,
+				     &extractTotals[0][0]);
+	       (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes),
+				     &extractTotals[1][0]);
+	       (*extractPackedPixel)(isSwap,(src+rowSizeInBytes),
+				     &extractTotals[2][0]);
+	       (*extractPackedPixel)(isSwap,
+				     (src+rowSizeInBytes+pixelSizeInBytes),
+				     &extractTotals[3][0]);
+
+	       (*extractPackedPixel)(isSwap,(src+imageSizeInBytes),
+				     &extractTotals[4][0]);
+	       (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes+imageSizeInBytes),
+				     &extractTotals[5][0]);
+	       (*extractPackedPixel)(isSwap,(src+rowSizeInBytes+imageSizeInBytes),
+				     &extractTotals[6][0]);
+	       (*extractPackedPixel)(isSwap,
+				     (src+rowSizeInBytes+pixelSizeInBytes+imageSizeInBytes),
+				     &extractTotals[7][0]);
+	       for (cc = 0; cc < components; cc++) { 
+		  int kk;
+
+		  /* grab 8 pixels to average */
+		  totals[cc]= 0.0;
+		  /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
+		   *              extractTotals[2][RED]+extractTotals[3][RED]+
+		   *              extractTotals[4][RED]+extractTotals[5][RED]+
+		   *              extractTotals[6][RED]+extractTotals[7][RED];
+		   * totals[RED]/= 8.0;
+		   */
+		  for (kk = 0; kk < BOX8; kk++) {
+		     totals[cc]+= extractTotals[kk][cc];
+		  }
+		  totals[cc]/= (float)BOX8;
+	       }
+	       (*shovePackedPixel)(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 is at beginning of a row here, but it's the second row of
+	     * the square block of 4 pixels that we just worked on so we
+	     * need to go one more row.  
+	     * i.e.,             
+	     *                   OO... 
+	     *           here -->OO...
+	     *       but want -->OO...
+	     *                   OO... 
+	     *                   ...
+	     */
+	    src+= rowSizeInBytes;
+	 }
+
+	 src+= imageSizeInBytes; 
+      } /* for dd */
+
+      /* both pointers must reach one byte after the end */
+      assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
+      assert(outIndex == halfWidth * halfHeight * halfDepth);
+   } /* for dd */
+
+} /* halveImagePackedPixel3D() */
+
+static int gluBuild3DMipmapLevelsCore(GLenum target, GLint internalFormat, 
+				      GLsizei width, 
+				      GLsizei height, 
+				      GLsizei depth,
+				      GLsizei widthPowerOf2, 
+				      GLsizei heightPowerOf2, 
+				      GLsizei depthPowerOf2,
+				      GLenum format, GLenum type, 
+				      GLint userLevel,
+				      GLint baseLevel,GLint maxLevel,
+				      const void *data)
+{
+   GLint newWidth, newHeight, newDepth;
+   GLint level, levels;
+   const void *usersImage;
+   void *srcImage, *dstImage;
+   GLint newImageWidth, newImageHeight, newImageDepth;
+   __GLU_INIT_SWAP_IMAGE;
+   GLint memReq;
+   GLint maxSize;
+   GLint cmpts;
+
+   GLint myswapBytes, groupsPerLine, elementSize, groupSize;
+   GLint rowsPerImage, imageSize;
+   GLint rowSize, padding;
+   PixelStorageModes psm;
+
+   assert(checkMipmapArgs(internalFormat,format,type) == 0);
+   assert(width >= 1 && height >= 1 && depth >= 1);
+   assert(type != GL_BITMAP);
+
+   srcImage = dstImage = NULL;
+
+   newWidth= widthPowerOf2;
+   newHeight= heightPowerOf2;
+   newDepth= depthPowerOf2;
+   levels = computeLog(newWidth);
+   level = computeLog(newHeight);
+   if (level > levels) levels=level;
+   level = computeLog(newDepth);
+   if (level > levels) levels=level;
+
+   levels+= userLevel;
+
+   retrieveStoreModes3D(&psm);
+   myswapBytes = psm.unpack_swap_bytes;
+   cmpts = elements_per_group(format,type);
+   if (psm.unpack_row_length > 0) {
+       groupsPerLine = psm.unpack_row_length;
+   } else {
+       groupsPerLine = width;
+   }
+
+   elementSize = bytes_per_element(type);
+   groupSize = elementSize * cmpts;
+   if (elementSize == 1) myswapBytes = 0;
+
+   /* 3dstuff begin */
+   if (psm.unpack_image_height > 0) { 
+      rowsPerImage= psm.unpack_image_height; 
+   }
+   else {
+      rowsPerImage= height;
+   }
+
+   /* 3dstuff end */
+   rowSize = groupsPerLine * groupSize;
+   padding = (rowSize % psm.unpack_alignment);
+   if (padding) {
+       rowSize += psm.unpack_alignment - padding;
+   }
+
+   imageSize= rowsPerImage * rowSize; /* 3dstuff */
+
+   usersImage = (const GLubyte *)data + psm.unpack_skip_rows * rowSize + 
+				  psm.unpack_skip_pixels * groupSize +
+				  /* 3dstuff */
+				  psm.unpack_skip_images * imageSize;      
+
+   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
+   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
+
+   level = userLevel;
+
+   if (width == newWidth && height == newHeight && depth == newDepth) {
+       /* Use usersImage for level userLevel */
+       if (baseLevel <= level && level <= maxLevel) {
+          glTexImage3D(target, level, internalFormat, width, 
+		       height, depth, 0, format, type,
+		       usersImage);
+       }
+       if(levels == 0) { /* we're done. clean up and return */
+	 glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	 glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	 glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	 glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	 glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	 glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
+	 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
+	 return 0;
+       }
+       {
+	  int nextWidth= newWidth/2;
+	  int nextHeight= newHeight/2;
+	  int nextDepth= newDepth/2;
+
+	  /* clamp to 1 */
+	  if (nextWidth < 1) nextWidth= 1;
+	  if (nextHeight < 1) nextHeight= 1;
+	  if (nextDepth < 1) nextDepth= 1;	   
+       memReq = imageSize3D(nextWidth, nextHeight, nextDepth, format, type);
+       }
+       switch(type) {
+       case GL_UNSIGNED_BYTE:
+	 dstImage = (GLubyte *)malloc(memReq);
+	 break;
+       case GL_BYTE:
+	 dstImage = (GLbyte *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_SHORT:
+	 dstImage = (GLushort *)malloc(memReq);
+	 break;
+       case GL_SHORT:
+	 dstImage = (GLshort *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_INT:
+	 dstImage = (GLuint *)malloc(memReq);
+	 break;
+       case GL_INT:
+	 dstImage = (GLint *)malloc(memReq);
+	 break;
+       case GL_FLOAT:
+	 dstImage = (GLfloat *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_BYTE_3_3_2: 
+       case GL_UNSIGNED_BYTE_2_3_3_REV: 
+	 dstImage = (GLubyte *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_SHORT_5_6_5:
+       case GL_UNSIGNED_SHORT_5_6_5_REV:
+       case GL_UNSIGNED_SHORT_4_4_4_4:
+       case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+       case GL_UNSIGNED_SHORT_5_5_5_1:
+       case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	 dstImage = (GLushort *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_INT_8_8_8_8:
+       case GL_UNSIGNED_INT_8_8_8_8_REV:
+       case GL_UNSIGNED_INT_10_10_10_2:
+       case GL_UNSIGNED_INT_2_10_10_10_REV:
+	 dstImage = (GLuint *)malloc(memReq);	  
+	 break;
+       default:
+	 return GLU_INVALID_ENUM; /* assertion */
+       }
+       if (dstImage == NULL) {
+	 glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	 glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	 glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	 glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	 glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	 glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
+	 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
+	 return GLU_OUT_OF_MEMORY;
+       }
+       else
+	 switch(type) {
+	 case GL_UNSIGNED_BYTE:
+	   if (depth > 1) {
+	     halveImage3D(cmpts,extractUbyte,shoveUbyte,
+			  width,height,depth,
+			  usersImage,dstImage,elementSize,groupSize,rowSize,
+			  imageSize,myswapBytes);
+	   }
+	   else {
+	     halveImage_ubyte(cmpts,width,height,usersImage,dstImage,
+			      elementSize,rowSize,groupSize);
+	   }
+	   break;
+	 case GL_BYTE:
+	   if (depth > 1) {
+	   halveImage3D(cmpts,extractSbyte,shoveSbyte,
+			width,height,depth,
+			usersImage,dstImage,elementSize,groupSize,rowSize,
+			imageSize,myswapBytes);
+	   }
+	   else {
+	     halveImage_byte(cmpts,width,height,usersImage,dstImage,
+			     elementSize,rowSize,groupSize);
+	   }
+	   break;
+	 case GL_UNSIGNED_SHORT:
+	   if (depth > 1) {
+	   halveImage3D(cmpts,extractUshort,shoveUshort,
+			width,height,depth,
+			usersImage,dstImage,elementSize,groupSize,rowSize,
+			imageSize,myswapBytes);
+	   }
+	   else {
+	     halveImage_ushort(cmpts,width,height,usersImage,dstImage,
+			       elementSize,rowSize,groupSize,myswapBytes);
+	   }
+	   break;
+	 case GL_SHORT:
+           if (depth > 1) { 
+	   halveImage3D(cmpts,extractSshort,shoveSshort,
+			width,height,depth,
+			usersImage,dstImage,elementSize,groupSize,rowSize,
+			imageSize,myswapBytes);
+	   }
+	   else {
+	     halveImage_short(cmpts,width,height,usersImage,dstImage,
+			      elementSize,rowSize,groupSize,myswapBytes);
+	   }
+	   break;
+	 case GL_UNSIGNED_INT:
+	   if (depth > 1) { 
+	   halveImage3D(cmpts,extractUint,shoveUint,
+			width,height,depth,
+			usersImage,dstImage,elementSize,groupSize,rowSize,
+			imageSize,myswapBytes);
+	   }
+	   else {
+	     halveImage_uint(cmpts,width,height,usersImage,dstImage,
+			     elementSize,rowSize,groupSize,myswapBytes);
+	   }
+	   break;
+	 case GL_INT:
+	   if (depth > 1) { 
+	   halveImage3D(cmpts,extractSint,shoveSint,
+			width,height,depth,
+			usersImage,dstImage,elementSize,groupSize,rowSize,
+			imageSize,myswapBytes);
+	   }
+	   else {
+	     halveImage_int(cmpts,width,height,usersImage,dstImage,
+			    elementSize,rowSize,groupSize,myswapBytes);
+	   }
+	   break;
+	 case GL_FLOAT:
+	   if (depth > 1 ) {
+	   halveImage3D(cmpts,extractFloat,shoveFloat,
+			width,height,depth,
+			usersImage,dstImage,elementSize,groupSize,rowSize,
+			imageSize,myswapBytes);
+	   }
+	   else {
+	     halveImage_float(cmpts,width,height,usersImage,dstImage,
+			      elementSize,rowSize,groupSize,myswapBytes);
+	   }
+	   break;
+	 case GL_UNSIGNED_BYTE_3_3_2: 
+	   assert(format == GL_RGB);
+	   halveImagePackedPixel3D(3,extract332,shove332,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;
+	 case GL_UNSIGNED_BYTE_2_3_3_REV:
+	   assert(format == GL_RGB);
+	   halveImagePackedPixel3D(3,extract233rev,shove233rev,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;
+	 case GL_UNSIGNED_SHORT_5_6_5:
+	   halveImagePackedPixel3D(3,extract565,shove565,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;
+	 case GL_UNSIGNED_SHORT_5_6_5_REV:
+	   halveImagePackedPixel3D(3,extract565rev,shove565rev,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;
+	 case GL_UNSIGNED_SHORT_4_4_4_4:
+	   halveImagePackedPixel3D(4,extract4444,shove4444,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;          
+	 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	   halveImagePackedPixel3D(4,extract4444rev,shove4444rev,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;          
+	 case GL_UNSIGNED_SHORT_5_5_5_1:
+	   halveImagePackedPixel3D(4,extract5551,shove5551,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;          
+	 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	   halveImagePackedPixel3D(4,extract1555rev,shove1555rev,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;          
+	 case GL_UNSIGNED_INT_8_8_8_8:
+	   halveImagePackedPixel3D(4,extract8888,shove8888,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;          
+	 case GL_UNSIGNED_INT_8_8_8_8_REV:
+	   halveImagePackedPixel3D(4,extract8888rev,shove8888rev,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;          
+	 case GL_UNSIGNED_INT_10_10_10_2:
+	   halveImagePackedPixel3D(4,extract1010102,shove1010102,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;          
+	 case GL_UNSIGNED_INT_2_10_10_10_REV:
+	   halveImagePackedPixel3D(4,extract2101010rev,shove2101010rev,
+				   width,height,depth,usersImage,dstImage,
+				   elementSize,rowSize,imageSize,myswapBytes);
+	   break;          
+	 default:
+	   assert(0);
+	   break;
+	 }
+       newWidth = width/2;
+       newHeight = height/2;
+       newDepth = depth/2;
+       /* clamp to 1 */
+       if (newWidth < 1) newWidth= 1;
+       if (newHeight < 1) newHeight= 1; 
+       if (newDepth < 1) newDepth= 1;
+
+       myswapBytes = 0;
+       rowSize = newWidth * groupSize;
+       imageSize= rowSize * newHeight; /* 3dstuff */
+       memReq = imageSize3D(newWidth, newHeight, newDepth, format, type);
+       /* Swap srcImage and dstImage */
+       __GLU_SWAP_IMAGE(srcImage,dstImage);
+       switch(type) {
+       case GL_UNSIGNED_BYTE:
+	 dstImage = (GLubyte *)malloc(memReq);
+	 break;
+       case GL_BYTE:
+	 dstImage = (GLbyte *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_SHORT:
+	 dstImage = (GLushort *)malloc(memReq);
+	 break;
+       case GL_SHORT:
+	 dstImage = (GLshort *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_INT:
+	 dstImage = (GLuint *)malloc(memReq);
+	 break;
+       case GL_INT:
+	 dstImage = (GLint *)malloc(memReq);
+	 break;
+       case GL_FLOAT:
+	 dstImage = (GLfloat *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_BYTE_3_3_2:
+       case GL_UNSIGNED_BYTE_2_3_3_REV:
+	 dstImage = (GLubyte *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_SHORT_5_6_5:
+       case GL_UNSIGNED_SHORT_5_6_5_REV:
+       case GL_UNSIGNED_SHORT_4_4_4_4:
+       case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+       case GL_UNSIGNED_SHORT_5_5_5_1:
+       case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	 dstImage = (GLushort *)malloc(memReq);
+	 break;
+       case GL_UNSIGNED_INT_8_8_8_8:
+       case GL_UNSIGNED_INT_8_8_8_8_REV:
+       case GL_UNSIGNED_INT_10_10_10_2:
+       case GL_UNSIGNED_INT_2_10_10_10_REV:
+	 dstImage = (GLuint *)malloc(memReq);
+	 break;
+       default:
+	 return GLU_INVALID_ENUM; /* assertion */
+       }
+       if (dstImage == NULL) {
+	 glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	 glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	 glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	 glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	 glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	 glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
+	 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
+	 return GLU_OUT_OF_MEMORY;
+       }
+       /* level userLevel+1 is in srcImage; level userLevel already saved */
+       level = userLevel+1; 
+   } else {/* user's image is *not* nice power-of-2 sized square */
+       memReq = imageSize3D(newWidth, newHeight, newDepth, format, type);
+       switch(type) {
+	   case GL_UNSIGNED_BYTE:
+	       dstImage = (GLubyte *)malloc(memReq);
+	       break;
+	   case GL_BYTE:
+	       dstImage = (GLbyte *)malloc(memReq);
+	       break;
+	   case GL_UNSIGNED_SHORT:
+	       dstImage = (GLushort *)malloc(memReq);
+	       break;
+	   case GL_SHORT:
+	       dstImage = (GLshort *)malloc(memReq);
+	       break;
+	   case GL_UNSIGNED_INT:
+	       dstImage = (GLuint *)malloc(memReq);
+	       break;
+	   case GL_INT:
+	       dstImage = (GLint *)malloc(memReq);
+	       break;
+	   case GL_FLOAT:
+	       dstImage = (GLfloat *)malloc(memReq);
+	       break;
+	   case GL_UNSIGNED_BYTE_3_3_2:
+	   case GL_UNSIGNED_BYTE_2_3_3_REV:
+	       dstImage = (GLubyte *)malloc(memReq);
+	       break;
+	   case GL_UNSIGNED_SHORT_5_6_5:
+	   case GL_UNSIGNED_SHORT_5_6_5_REV:
+	   case GL_UNSIGNED_SHORT_4_4_4_4:
+	   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	   case GL_UNSIGNED_SHORT_5_5_5_1:
+	   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	       dstImage = (GLushort *)malloc(memReq);
+	       break;
+	   case GL_UNSIGNED_INT_8_8_8_8:
+	   case GL_UNSIGNED_INT_8_8_8_8_REV:
+	   case GL_UNSIGNED_INT_10_10_10_2:
+	   case GL_UNSIGNED_INT_2_10_10_10_REV:
+	       dstImage = (GLuint *)malloc(memReq);
+	       break;
+	   default:
+	       return GLU_INVALID_ENUM;	/* assertion */
+       }
+
+       if (dstImage == NULL) {
+	   glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	   glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	   glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	   glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	   glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	   glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
+	   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
+	   return GLU_OUT_OF_MEMORY;
+       }
+       /*printf("Build3DMipmaps(): ScaleImage3D %d %d %d->%d %d %d\n",
+       width,height,depth,newWidth,newHeight,newDepth);*/
+
+       gluScaleImage3D(format, width, height, depth, type, usersImage,
+		       newWidth, newHeight, newDepth, type, dstImage);
+
+       myswapBytes = 0;
+       rowSize = newWidth * groupSize;
+       imageSize = rowSize * newHeight; /* 3dstuff */
+       /* Swap dstImage and srcImage */
+       __GLU_SWAP_IMAGE(srcImage,dstImage);
+
+       if(levels != 0) { /* use as little memory as possible */
+	 {
+	    int nextWidth= newWidth/2;
+	    int nextHeight= newHeight/2;
+	    int nextDepth= newDepth/2;
+	    if (nextWidth < 1) nextWidth= 1;
+	    if (nextHeight < 1) nextHeight= 1;	     
+	    if (nextDepth < 1) nextDepth= 1;	     
+
+	 memReq = imageSize3D(nextWidth, nextHeight, nextDepth, format, type);
+	 }
+	 switch(type) {
+	 case GL_UNSIGNED_BYTE:
+	   dstImage = (GLubyte *)malloc(memReq);
+	   break;
+	 case GL_BYTE:
+	   dstImage = (GLbyte *)malloc(memReq);
+	   break;
+	 case GL_UNSIGNED_SHORT:
+	   dstImage = (GLushort *)malloc(memReq);
+	   break;
+	 case GL_SHORT:
+	   dstImage = (GLshort *)malloc(memReq);
+	   break;
+	 case GL_UNSIGNED_INT:
+	   dstImage = (GLuint *)malloc(memReq);
+	   break;
+	 case GL_INT:
+	   dstImage = (GLint *)malloc(memReq);
+	   break;
+	 case GL_FLOAT:
+	   dstImage = (GLfloat *)malloc(memReq);
+	   break;
+	 case GL_UNSIGNED_BYTE_3_3_2:
+	 case GL_UNSIGNED_BYTE_2_3_3_REV:
+	   dstImage = (GLubyte *)malloc(memReq);
+	   break;
+	 case GL_UNSIGNED_SHORT_5_6_5:
+	 case GL_UNSIGNED_SHORT_5_6_5_REV:
+	 case GL_UNSIGNED_SHORT_4_4_4_4:
+	 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	 case GL_UNSIGNED_SHORT_5_5_5_1:
+	 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+	   dstImage = (GLushort *)malloc(memReq);
+	   break;
+	 case GL_UNSIGNED_INT_8_8_8_8:
+	 case GL_UNSIGNED_INT_8_8_8_8_REV:
+	 case GL_UNSIGNED_INT_10_10_10_2:
+	 case GL_UNSIGNED_INT_2_10_10_10_REV:
+	   dstImage = (GLuint *)malloc(memReq);
+	   break;
+	 default:
+	   return GLU_INVALID_ENUM; /* assertion */
+	 }
+	 if (dstImage == NULL) {
+	   glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+	   glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+	   glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+	   glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+	   glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+	   glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
+	   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
+	   return GLU_OUT_OF_MEMORY;
+	 }
+       }
+       /* level userLevel is in srcImage; nothing saved yet */
+       level = userLevel;	
+   }
+
+   glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
+   if (baseLevel <= level && level <= maxLevel) {
+     glTexImage3D(target, level, internalFormat, newWidth, newHeight, newDepth,
+		  0,format, type, (void *)srcImage);
+   }
+   level++; /* update current level for the loop */
+   for (; level <= levels; level++) {
+       switch(type) {
+	   case GL_UNSIGNED_BYTE:
+	       if (newDepth > 1) {
+	       halveImage3D(cmpts,extractUbyte,shoveUbyte,
+			    newWidth,newHeight,newDepth,
+			    srcImage,dstImage,elementSize,groupSize,rowSize,
+			    imageSize,myswapBytes);
+	       }
+	       else {
+		 halveImage_ubyte(cmpts,newWidth,newHeight,srcImage,dstImage,
+				  elementSize,rowSize,groupSize);
+	       }
+	       break;
+	   case GL_BYTE:
+	       if (newDepth > 1) {
+	       halveImage3D(cmpts,extractSbyte,shoveSbyte,
+			    newWidth,newHeight,newDepth,
+			    srcImage,dstImage,elementSize,groupSize,rowSize,
+			    imageSize,myswapBytes);
+	       }
+	       else {
+		 halveImage_byte(cmpts,newWidth,newHeight,srcImage,dstImage,
+				  elementSize,rowSize,groupSize);
+	       }
+	       break;
+	   case GL_UNSIGNED_SHORT:
+	       if (newDepth > 1) { 
+	       halveImage3D(cmpts,extractUshort,shoveUshort,
+			    newWidth,newHeight,newDepth,
+			    srcImage,dstImage,elementSize,groupSize,rowSize,
+			    imageSize,myswapBytes);
+	       }
+	       else {
+		 halveImage_ushort(cmpts,newWidth,newHeight,srcImage,dstImage,
+				   elementSize,rowSize,groupSize,myswapBytes);
+	       }
+	       break;
+	   case GL_SHORT:
+	       if (newDepth > 1) {
+	       halveImage3D(cmpts,extractSshort,shoveSshort,
+			    newWidth,newHeight,newDepth,
+			    srcImage,dstImage,elementSize,groupSize,rowSize,
+			    imageSize,myswapBytes);
+	       }
+	       else {
+		 halveImage_short(cmpts,newWidth,newHeight,srcImage,dstImage,
+				  elementSize,rowSize,groupSize,myswapBytes);
+	       }
+	       break;
+	   case GL_UNSIGNED_INT:
+	       if (newDepth > 1) {
+	       halveImage3D(cmpts,extractUint,shoveUint,
+			    newWidth,newHeight,newDepth,
+			    srcImage,dstImage,elementSize,groupSize,rowSize,
+			    imageSize,myswapBytes);
+	       }
+	       else {
+		 halveImage_uint(cmpts,newWidth,newHeight,srcImage,dstImage,
+				 elementSize,rowSize,groupSize,myswapBytes);
+	       }
+	       break;
+	   case GL_INT:
+	       if (newDepth > 1) {
+	       halveImage3D(cmpts,extractSint,shoveSint,
+			    newWidth,newHeight,newDepth,
+			    srcImage,dstImage,elementSize,groupSize,rowSize,
+			    imageSize,myswapBytes);
+	       }
+	       else {
+		 halveImage_int(cmpts,newWidth,newHeight,srcImage,dstImage,
+				elementSize,rowSize,groupSize,myswapBytes);
+	       }
+	       break;
+	   case GL_FLOAT:
+	       if (newDepth > 1) {
+	       halveImage3D(cmpts,extractFloat,shoveFloat,
+			    newWidth,newHeight,newDepth,
+			    srcImage,dstImage,elementSize,groupSize,rowSize,
+			    imageSize,myswapBytes);
+	       }
+	       else {
+		 halveImage_float(cmpts,newWidth,newHeight,srcImage,dstImage,
+				  elementSize,rowSize,groupSize,myswapBytes);
+	       }
+	       break;
+	   case GL_UNSIGNED_BYTE_3_3_2:
+	       halveImagePackedPixel3D(3,extract332,shove332,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_BYTE_2_3_3_REV:
+	       halveImagePackedPixel3D(3,extract233rev,shove233rev,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_SHORT_5_6_5:
+	       halveImagePackedPixel3D(3,extract565,shove565,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_SHORT_5_6_5_REV:
+	       halveImagePackedPixel3D(3,extract565rev,shove565rev,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_SHORT_4_4_4_4:
+	       halveImagePackedPixel3D(4,extract4444,shove4444,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+	       halveImagePackedPixel3D(4,extract4444rev,shove4444rev,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_SHORT_5_5_5_1: 		
+	       halveImagePackedPixel3D(4,extract5551,shove5551,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_SHORT_1_5_5_5_REV: 		
+	       halveImagePackedPixel3D(4,extract1555rev,shove1555rev,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_INT_8_8_8_8:
+	       halveImagePackedPixel3D(4,extract8888,shove8888,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_INT_8_8_8_8_REV:
+	       halveImagePackedPixel3D(4,extract8888rev,shove8888rev,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_INT_10_10_10_2:
+	       halveImagePackedPixel3D(4,extract1010102,shove1010102,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   case GL_UNSIGNED_INT_2_10_10_10_REV:
+	       halveImagePackedPixel3D(4,extract2101010rev,shove2101010rev,
+				       newWidth,newHeight,newDepth,
+				       srcImage,dstImage,elementSize,rowSize,
+				       imageSize,myswapBytes);
+	       break;
+	   default:
+	       assert(0);
+	       break;
+       }
+
+       __GLU_SWAP_IMAGE(srcImage,dstImage);
+
+       if (newWidth > 1) { newWidth /= 2; rowSize /= 2;}
+       if (newHeight > 1) { newHeight /= 2; imageSize = rowSize * newHeight; }
+       if (newDepth > 1) newDepth /= 2;
+       {
+	  /* call tex image with srcImage untouched since it's not padded */
+	  if (baseLevel <= level && level <= maxLevel) {
+	    glTexImage3D(target, level, internalFormat, newWidth, newHeight,
+			 newDepth,0, format, type, (void *) srcImage);
+	  }
+       }
+   } /* for level */
+   glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
+   glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
+   glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
+   glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
+   glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
+   glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
+   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
+
+   free(srcImage); /*if you get to here, a srcImage has always been malloc'ed*/
+   if (dstImage) { /* if it's non-rectangular and only 1 level */
+     free(dstImage);
+   }
+   return 0;
+} /* gluBuild3DMipmapLevelsCore() */
+
+GLint GLAPIENTRY
+gluBuild3DMipmapLevels(GLenum target, GLint internalFormat, 
+			     GLsizei width, GLsizei height, GLsizei depth,
+			     GLenum format, GLenum type, 
+			     GLint userLevel, GLint baseLevel, GLint maxLevel,
+			     const void *data)
+{
+   int level, levels;
+
+   int rc= checkMipmapArgs(internalFormat,format,type);
+   if (rc != 0) return rc;
+
+   if (width < 1 || height < 1 || depth < 1) {
+       return GLU_INVALID_VALUE;
+   }
+
+   if(type == GL_BITMAP) {
+      return GLU_INVALID_ENUM;
+   }
+
+   levels = computeLog(width);
+   level = computeLog(height);
+   if (level > levels) levels=level;
+   level = computeLog(depth);
+   if (level > levels) levels=level;
+
+   levels+= userLevel;
+   if (!isLegalLevels(userLevel,baseLevel,maxLevel,levels)) 
+      return GLU_INVALID_VALUE;
+
+   return gluBuild3DMipmapLevelsCore(target, internalFormat, 
+				     width, height, depth,
+				     width, height, depth,
+				     format, type, 
+				     userLevel, baseLevel, maxLevel,
+				     data);
+} /* gluBuild3DMipmapLevels() */
+
+GLint GLAPIENTRY
+gluBuild3DMipmaps(GLenum target, GLint internalFormat, 
+			GLsizei width, GLsizei height, GLsizei depth,
+			GLenum format, GLenum type, const void *data)
+{
+   GLint widthPowerOf2, heightPowerOf2, depthPowerOf2;
+   int level, levels;
+
+   int rc= checkMipmapArgs(internalFormat,format,type);
+   if (rc != 0) return rc;
+
+   if (width < 1 || height < 1 || depth < 1) {
+       return GLU_INVALID_VALUE;
+   }
+
+   if(type == GL_BITMAP) {
+      return GLU_INVALID_ENUM;
+   }
+
+   closestFit3D(target,width,height,depth,internalFormat,format,type,
+		&widthPowerOf2,&heightPowerOf2,&depthPowerOf2);
+
+   levels = computeLog(widthPowerOf2);
+   level = computeLog(heightPowerOf2);
+   if (level > levels) levels=level;
+   level = computeLog(depthPowerOf2);
+   if (level > levels) levels=level;
+
+   return gluBuild3DMipmapLevelsCore(target, internalFormat, 
+				     width, height, depth,
+				     widthPowerOf2, heightPowerOf2, 
+				     depthPowerOf2,
+				     format, type, 0, 0, levels,
+				     data);
+} /* gluBuild3DMipmaps() */
+
+static GLdouble extractUbyte(int isSwap, const void *ubyte)
+{
+   isSwap= isSwap;		/* turn off warnings */
+
+   assert(*((const GLubyte *)ubyte) <= 255);
+
+   return (GLdouble)(*((const GLubyte *)ubyte));
+} /* extractUbyte() */
+
+static void shoveUbyte(GLdouble value, int index, void *data)
+{
+   assert(0.0 <= value && value < 256.0);
+
+   ((GLubyte *)data)[index]= (GLubyte)value;
+} /* shoveUbyte() */
+
+static GLdouble extractSbyte(int isSwap, const void *sbyte)
+{
+   isSwap= isSwap;		/* turn off warnings */
+
+   assert(*((const GLbyte *)sbyte) <= 127);
+
+   return (GLdouble)(*((const GLbyte *)sbyte));
+} /* extractSbyte() */
+
+static void shoveSbyte(GLdouble value, int index, void *data)
+{
+   ((GLbyte *)data)[index]= (GLbyte)value;
+} /* shoveSbyte() */
+
+static GLdouble extractUshort(int isSwap, const void *uitem)
+{
+   GLushort ushort;
+
+   if (isSwap) {
+     ushort= __GLU_SWAP_2_BYTES(uitem);
+   }
+   else {
+     ushort= *(const GLushort *)uitem;
+   }
+
+   assert(ushort <= 65535);  
+
+   return (GLdouble)ushort;
+} /* extractUshort() */
+
+static void shoveUshort(GLdouble value, int index, void *data)
+{
+   assert(0.0 <= value && value < 65536.0);
+
+   ((GLushort *)data)[index]= (GLushort)value;
+} /* shoveUshort() */
+
+static GLdouble extractSshort(int isSwap, const void *sitem)
+{
+   GLshort sshort;
+
+   if (isSwap) {
+     sshort= __GLU_SWAP_2_BYTES(sitem);
+   }
+   else {
+     sshort= *(const GLshort *)sitem;
+   }
+
+   assert(sshort <= 32767);  
+
+   return (GLdouble)sshort;
+} /* extractSshort() */
+
+static void shoveSshort(GLdouble value, int index, void *data)
+{
+   assert(0.0 <= value && value < 32768.0);
+
+   ((GLshort *)data)[index]= (GLshort)value;
+} /* shoveSshort() */
+
+static GLdouble extractUint(int isSwap, const void *uitem)
+{
+   GLuint uint;
+
+   if (isSwap) {
+     uint= __GLU_SWAP_4_BYTES(uitem);
+   }
+   else {
+     uint= *(const GLuint *)uitem;
+   }
+
+   assert(uint <= 0xffffffff);  
+
+   return (GLdouble)uint;
+} /* extractUint() */
+
+static void shoveUint(GLdouble value, int index, void *data)
+{
+   assert(0.0 <= value && value <= (GLdouble) UINT_MAX); 
+
+   ((GLuint *)data)[index]= (GLuint)value;
+} /* shoveUint() */
+
+static GLdouble extractSint(int isSwap, const void *sitem)
+{
+   GLint sint;
+
+   if (isSwap) {
+     sint= __GLU_SWAP_4_BYTES(sitem);
+   }
+   else {
+     sint= *(const GLint *)sitem;
+   }
+
+   assert(sint <= 0x7fffffff);  
+
+   return (GLdouble)sint;
+} /* extractSint() */
+
+static void shoveSint(GLdouble value, int index, void *data)
+{
+   assert(0.0 <= value && value <= (GLdouble) INT_MAX); 
+
+   ((GLint *)data)[index]= (GLint)value;
+} /* shoveSint() */
+
+static GLdouble extractFloat(int isSwap, const void *item)
+{
+   GLfloat ffloat;
+
+   if (isSwap) {
+     ffloat= __GLU_SWAP_4_BYTES(item);
+   }
+   else {
+     ffloat= *(const GLfloat *)item;
+   }
+
+   assert(ffloat <= 1.0);  
+
+   return (GLdouble)ffloat;
+} /* extractFloat() */
+
+static void shoveFloat(GLdouble value, int index, void *data)
+{
+   assert(0.0 <= value && value <= 1.0);
+
+   ((GLfloat *)data)[index]= value;
+} /* shoveFloat() */
+
+static void halveImageSlice(int components,
+			    GLdouble (*extract)(int, const void *),
+			    void (*shove)(GLdouble, int, void *),
+			    GLint width, GLint height, GLint depth,
+			    const void *dataIn, void *dataOut,
+			    GLint elementSizeInBytes,
+			    GLint groupSizeInBytes, 
+			    GLint rowSizeInBytes, 
+			    GLint imageSizeInBytes,
+			    GLint isSwap)
+{
+   int ii, jj;
+   int halfWidth= width / 2;
+   int halfHeight= height / 2;
+   int halfDepth= depth / 2;
+   const char *src= (const char *)dataIn;
+   int padBytes= rowSizeInBytes - (width * groupSizeInBytes);
+   int outIndex= 0;
+
+   assert((width == 1 || height == 1) && depth >= 2);
+
+   if (width == height) {	/* a 1-pixel column viewed from top */
+      /* printf("1-column\n");*/
+      assert(width == 1 && height == 1);
+      assert(depth >= 2);
+
+      for (ii= 0; ii< halfDepth; ii++) {
+	 int cc;
+
+	 for (cc = 0; cc < components; cc++) {
+	    double totals[4];
+	    double extractTotals[BOX2][4];
+	    int kk;
+
+	    extractTotals[0][cc]= (*extract)(isSwap,src);
+	    extractTotals[1][cc]= (*extract)(isSwap,(src+imageSizeInBytes));
+
+	    /* average 2 pixels since only a column */
+	    totals[cc]= 0.0;
+	    /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
+	     * totals[RED]/= 2.0;
+	     */
+	    for (kk = 0; kk < BOX2; kk++) {
+	      totals[cc]+= extractTotals[kk][cc];
+	    }
+	    totals[cc]/= (double)BOX2;
+
+	    (*shove)(totals[cc],outIndex,dataOut);
+	    outIndex++;
+	    src+= elementSizeInBytes;
+	 } /* for cc */
+
+	 /* skip over to next group of 2 */
+	 src+= rowSizeInBytes;
+      } /* for ii */
+
+      assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
+      assert(outIndex == halfDepth * components);
+   }
+   else if (height == 1) {	/* horizontal slice viewed from top */
+      /* printf("horizontal slice\n"); */
+      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[4];
+	       double extractTotals[BOX4][4]; 
+
+	       extractTotals[0][cc]=(*extract)(isSwap,src);
+	       extractTotals[1][cc]=(*extract)(isSwap,
+					       (src+groupSizeInBytes));
+	       extractTotals[2][cc]=(*extract)(isSwap,
+					       (src+imageSizeInBytes));
+	       extractTotals[3][cc]=(*extract)(isSwap,
+					       (src+imageSizeInBytes+groupSizeInBytes));
+
+	       /* grab 4 pixels to average */
+	       totals[cc]= 0.0;
+	       /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
+		*              extractTotals[2][RED]+extractTotals[3][RED];
+		* totals[RED]/= 4.0;
+		*/
+	       for (kk = 0; kk < BOX4; kk++) {
+		  totals[cc]+= extractTotals[kk][cc];
+	       }
+	       totals[cc]/= (double)BOX4;
+
+	       (*shove)(totals[cc],outIndex,dataOut);
+	       outIndex++;
+
+	       src+= elementSizeInBytes;
+	    } /* for cc */ 
+
+	    /* skip over to next horizontal square of 4 */
+	    src+= groupSizeInBytes;
+	 } /* for jj */
+	 src+= padBytes;
+
+	 src+= rowSizeInBytes;
+      } /* for ii */
+
+      assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
+      assert(outIndex == halfWidth * halfDepth * components);
+   } 
+   else if (width == 1) {	/* vertical slice viewed from top */
+      /* printf("vertical slice\n"); */
+      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[4];
+	       double extractTotals[BOX4][4];
+
+	       extractTotals[0][cc]=(*extract)(isSwap,src);
+	       extractTotals[1][cc]=(*extract)(isSwap,
+					       (src+rowSizeInBytes));
+	       extractTotals[2][cc]=(*extract)(isSwap,
+					       (src+imageSizeInBytes));
+	       extractTotals[3][cc]=(*extract)(isSwap,
+					       (src+imageSizeInBytes+rowSizeInBytes));
+
+	       /* grab 4 pixels to average */
+	       totals[cc]= 0.0;
+	       /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
+		*              extractTotals[2][RED]+extractTotals[3][RED];
+		* totals[RED]/= 4.0;
+		*/
+	       for (kk = 0; kk < BOX4; kk++) {
+		  totals[cc]+= extractTotals[kk][cc];
+	       }
+	       totals[cc]/= (double)BOX4;
+
+	       (*shove)(totals[cc],outIndex,dataOut);
+	       outIndex++;
+
+	       src+= elementSizeInBytes;
+	    } /* for cc */
+	    src+= padBytes;
+
+	    /* skip over to next vertical square of 4 */
+	    src+= rowSizeInBytes;
+	 } /* for jj */
+
+	 src+= imageSizeInBytes;
+      } /* for ii */ 
+
+      assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
+      assert(outIndex == halfHeight * halfDepth * components);
+   }
+
+} /* halveImageSlice() */
+
+static void halveImage3D(int components,
+			 GLdouble (*extract)(int, const void *),
+			 void (*shove)(GLdouble, int, void *),
+			 GLint width, GLint height, GLint depth,
+			 const void *dataIn, void *dataOut,
+			 GLint elementSizeInBytes,
+			 GLint groupSizeInBytes, 
+			 GLint rowSizeInBytes, 
+			 GLint imageSizeInBytes,
+			 GLint isSwap)
+{
+   assert(depth > 1); 
+
+   /* a horizontal/vertical/one-column slice viewed from top */
+   if (width == 1 || height == 1) { 
+      assert(1 <= depth);
+
+      halveImageSlice(components,extract,shove, 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;  
+      const char *src= (const char *) dataIn;
+      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;
+#define BOX8 8
+		  double totals[4];	/* 4 is maximum components */
+		  double extractTotals[BOX8][4]; /* 4 is maximum components */
+
+		  extractTotals[0][cc]= (*extract)(isSwap,src);
+		  extractTotals[1][cc]= (*extract)(isSwap,
+						   (src+groupSizeInBytes));
+		  extractTotals[2][cc]= (*extract)(isSwap,
+						   (src+rowSizeInBytes));
+		  extractTotals[3][cc]= (*extract)(isSwap,
+						   (src+rowSizeInBytes+groupSizeInBytes));
+
+		  extractTotals[4][cc]= (*extract)(isSwap,
+						   (src+imageSizeInBytes));
+
+		  extractTotals[5][cc]= (*extract)(isSwap,
+						   (src+groupSizeInBytes+imageSizeInBytes));
+		  extractTotals[6][cc]= (*extract)(isSwap,
+						   (src+rowSizeInBytes+imageSizeInBytes));
+		  extractTotals[7][cc]= (*extract)(isSwap,
+						   (src+rowSizeInBytes+groupSizeInBytes+imageSizeInBytes));
+
+		  totals[cc]= 0.0;
+
+		  /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
+		   *              extractTotals[2][RED]+extractTotals[3][RED]+
+		   *              extractTotals[4][RED]+extractTotals[5][RED]+
+		   *              extractTotals[6][RED]+extractTotals[7][RED];
+		   * totals[RED]/= 8.0;
+		   */
+		  for (kk = 0; kk < BOX8; kk++) {
+		     totals[cc]+= extractTotals[kk][cc];
+		  }
+		  totals[cc]/= (double)BOX8;
+
+		  (*shove)(totals[cc],outIndex,dataOut);
+
+		  outIndex++;
+
+		  src+= elementSizeInBytes; /* go to next component */
+	       } /* 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 is at beginning of a row here, but it's the second row of
+	     * the square block of 4 pixels that we just worked on so we
+	     * need to go one more row.  
+	     * i.e.,             
+	     *                   OO... 
+	     *           here -->OO...
+	     *       but want -->OO...
+	     *                   OO... 
+	     *                   ...
+	     */
+	    src+= rowSizeInBytes;
+	 } /* for ii */
+
+	 src+= imageSizeInBytes; 
+      } /* for dd */
+
+      /* both pointers must reach one byte after the end */
+      assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
+      assert(outIndex == halfWidth * halfHeight * halfDepth * components);
+   }
+} /* halveImage3D() */
+
+
+
+/*** mipmap.c ***/
+
diff --git a/src/glu/sgi/libutil/project.c b/src/glu/sgi/libutil/project.c
new file mode 100644
index 00000000000..9440f429da3
--- /dev/null
+++ b/src/glu/sgi/libutil/project.c
@@ -0,0 +1,381 @@
+/*
+** 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.
+**
+** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libutil/project.c,v 1.1 2001/03/17 00:25:41 brianp Exp $
+*/
+
+#include "gluos.h"
+#include <math.h>
+#include <GL/gl.h>
+#include <GL/glu.h>
+#include "gluint.h"
+
+/*
+** Make m an identity matrix
+*/
+static void __gluMakeIdentityd(GLdouble m[16])
+{
+    m[0+4*0] = 1; m[0+4*1] = 0; m[0+4*2] = 0; m[0+4*3] = 0;
+    m[1+4*0] = 0; m[1+4*1] = 1; m[1+4*2] = 0; m[1+4*3] = 0;
+    m[2+4*0] = 0; m[2+4*1] = 0; m[2+4*2] = 1; m[2+4*3] = 0;
+    m[3+4*0] = 0; m[3+4*1] = 0; m[3+4*2] = 0; m[3+4*3] = 1;
+}
+
+static void __gluMakeIdentityf(GLfloat m[16])
+{
+    m[0+4*0] = 1; m[0+4*1] = 0; m[0+4*2] = 0; m[0+4*3] = 0;
+    m[1+4*0] = 0; m[1+4*1] = 1; m[1+4*2] = 0; m[1+4*3] = 0;
+    m[2+4*0] = 0; m[2+4*1] = 0; m[2+4*2] = 1; m[2+4*3] = 0;
+    m[3+4*0] = 0; m[3+4*1] = 0; m[3+4*2] = 0; m[3+4*3] = 1;
+}
+
+void GLAPIENTRY
+gluOrtho2D(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top)
+{
+    glOrtho(left, right, bottom, top, -1, 1);
+}
+
+#define __glPi 3.14159265358979323846
+
+void GLAPIENTRY
+gluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar)
+{
+    GLdouble m[4][4];
+    double sine, cotangent, deltaZ;
+    double radians = fovy / 2 * __glPi / 180;
+
+    deltaZ = zFar - zNear;
+    sine = sin(radians);
+    if ((deltaZ == 0) || (sine == 0) || (aspect == 0)) {
+	return;
+    }
+    cotangent = COS(radians) / sine;
+
+    __gluMakeIdentityd(&m[0][0]);
+    m[0][0] = cotangent / aspect;
+    m[1][1] = cotangent;
+    m[2][2] = -(zFar + zNear) / deltaZ;
+    m[2][3] = -1;
+    m[3][2] = -2 * zNear * zFar / deltaZ;
+    m[3][3] = 0;
+    glMultMatrixd(&m[0][0]);
+}
+
+static void normalize(float v[3])
+{
+    float r;
+
+    r = sqrt( v[0]*v[0] + v[1]*v[1] + v[2]*v[2] );
+    if (r == 0.0) return;
+
+    v[0] /= r;
+    v[1] /= r;
+    v[2] /= r;
+}
+
+static void cross(float v1[3], float v2[3], float result[3])
+{
+    result[0] = v1[1]*v2[2] - v1[2]*v2[1];
+    result[1] = v1[2]*v2[0] - v1[0]*v2[2];
+    result[2] = v1[0]*v2[1] - v1[1]*v2[0];
+}
+
+void GLAPIENTRY
+gluLookAt(GLdouble eyex, GLdouble eyey, GLdouble eyez, GLdouble centerx,
+	  GLdouble centery, GLdouble centerz, GLdouble upx, GLdouble upy,
+	  GLdouble upz)
+{
+    int i;
+    float forward[3], side[3], up[3];
+    GLfloat m[4][4];
+
+    forward[0] = centerx - eyex;
+    forward[1] = centery - eyey;
+    forward[2] = centerz - eyez;
+
+    up[0] = upx;
+    up[1] = upy;
+    up[2] = upz;
+
+    normalize(forward);
+
+    /* Side = forward x up */
+    cross(forward, up, side);
+    normalize(side);
+
+    /* Recompute up as: up = side x forward */
+    cross(side, forward, up);
+
+    __gluMakeIdentityf(&m[0][0]);
+    m[0][0] = side[0];
+    m[1][0] = side[1];
+    m[2][0] = side[2];
+
+    m[0][1] = up[0];
+    m[1][1] = up[1];
+    m[2][1] = up[2];
+
+    m[0][2] = -forward[0];
+    m[1][2] = -forward[1];
+    m[2][2] = -forward[2];
+
+    glMultMatrixf(&m[0][0]);
+    glTranslated(-eyex, -eyey, -eyez);
+}
+
+static void __gluMultMatrixVecd(const GLdouble matrix[16], const GLdouble in[4],
+		      GLdouble out[4])
+{
+    int i;
+
+    for (i=0; i<4; i++) {
+	out[i] = 
+	    in[0] * matrix[0*4+i] +
+	    in[1] * matrix[1*4+i] +
+	    in[2] * matrix[2*4+i] +
+	    in[3] * matrix[3*4+i];
+    }
+}
+
+/*
+** inverse = invert(src)
+*/
+static int __gluInvertMatrixd(const GLdouble src[16], GLdouble inverse[16])
+{
+    int i, j, k, swap;
+    double t;
+    GLdouble temp[4][4];
+
+    for (i=0; i<4; i++) {
+	for (j=0; j<4; j++) {
+	    temp[i][j] = src[i*4+j];
+	}
+    }
+    __gluMakeIdentityd(inverse);
+
+    for (i = 0; i < 4; i++) {
+	/*
+	** Look for largest element in column
+	*/
+	swap = i;
+	for (j = i + 1; j < 4; j++) {
+	    if (fabs(temp[j][i]) > fabs(temp[i][i])) {
+		swap = j;
+	    }
+	}
+
+	if (swap != i) {
+	    /*
+	    ** Swap rows.
+	    */
+	    for (k = 0; k < 4; k++) {
+		t = temp[i][k];
+		temp[i][k] = temp[swap][k];
+		temp[swap][k] = t;
+
+		t = inverse[i*4+k];
+		inverse[i*4+k] = inverse[swap*4+k];
+		inverse[swap*4+k] = t;
+	    }
+	}
+
+	if (temp[i][i] == 0) {
+	    /*
+	    ** No non-zero pivot.  The matrix is singular, which shouldn't
+	    ** happen.  This means the user gave us a bad matrix.
+	    */
+	    return GL_FALSE;
+	}
+
+	t = temp[i][i];
+	for (k = 0; k < 4; k++) {
+	    temp[i][k] /= t;
+	    inverse[i*4+k] /= t;
+	}
+	for (j = 0; j < 4; j++) {
+	    if (j != i) {
+		t = temp[j][i];
+		for (k = 0; k < 4; k++) {
+		    temp[j][k] -= temp[i][k]*t;
+		    inverse[j*4+k] -= inverse[i*4+k]*t;
+		}
+	    }
+	}
+    }
+    return GL_TRUE;
+}
+
+static void __gluMultMatricesd(const GLdouble a[16], const GLdouble b[16],
+				GLdouble r[16])
+{
+    int i, j;
+
+    for (i = 0; i < 4; i++) {
+	for (j = 0; j < 4; j++) {
+	    r[i*4+j] = 
+		a[i*4+0]*b[0*4+j] +
+		a[i*4+1]*b[1*4+j] +
+		a[i*4+2]*b[2*4+j] +
+		a[i*4+3]*b[3*4+j];
+	}
+    }
+}
+
+GLint GLAPIENTRY
+gluProject(GLdouble objx, GLdouble objy, GLdouble objz, 
+	      const GLdouble modelMatrix[16], 
+	      const GLdouble projMatrix[16],
+              const GLint viewport[4],
+	      GLdouble *winx, GLdouble *winy, GLdouble *winz)
+{
+    double in[4];
+    double out[4];
+
+    in[0]=objx;
+    in[1]=objy;
+    in[2]=objz;
+    in[3]=1.0;
+    __gluMultMatrixVecd(modelMatrix, in, out);
+    __gluMultMatrixVecd(projMatrix, out, in);
+    if (in[3] == 0.0) return(GL_FALSE);
+    in[0] /= in[3];
+    in[1] /= in[3];
+    in[2] /= in[3];
+    /* Map x, y and z to range 0-1 */
+    in[0] = in[0] * 0.5 + 0.5;
+    in[1] = in[1] * 0.5 + 0.5;
+    in[2] = in[2] * 0.5 + 0.5;
+
+    /* Map x,y to viewport */
+    in[0] = in[0] * viewport[2] + viewport[0];
+    in[1] = in[1] * viewport[3] + viewport[1];
+
+    *winx=in[0];
+    *winy=in[1];
+    *winz=in[2];
+    return(GL_TRUE);
+}
+
+GLint GLAPIENTRY
+gluUnProject(GLdouble winx, GLdouble winy, GLdouble winz,
+		const GLdouble modelMatrix[16], 
+		const GLdouble projMatrix[16],
+                const GLint viewport[4],
+	        GLdouble *objx, GLdouble *objy, GLdouble *objz)
+{
+    double finalMatrix[16];
+    double in[4];
+    double out[4];
+
+    __gluMultMatricesd(modelMatrix, projMatrix, finalMatrix);
+    if (!__gluInvertMatrixd(finalMatrix, finalMatrix)) return(GL_FALSE);
+
+    in[0]=winx;
+    in[1]=winy;
+    in[2]=winz;
+    in[3]=1.0;
+
+    /* Map x and y from window coordinates */
+    in[0] = (in[0] - viewport[0]) / viewport[2];
+    in[1] = (in[1] - viewport[1]) / viewport[3];
+
+    /* Map to range -1 to 1 */
+    in[0] = in[0] * 2 - 1;
+    in[1] = in[1] * 2 - 1;
+    in[2] = in[2] * 2 - 1;
+
+    __gluMultMatrixVecd(finalMatrix, in, out);
+    if (out[3] == 0.0) return(GL_FALSE);
+    out[0] /= out[3];
+    out[1] /= out[3];
+    out[2] /= out[3];
+    *objx = out[0];
+    *objy = out[1];
+    *objz = out[2];
+    return(GL_TRUE);
+}
+
+GLint GLAPIENTRY
+gluUnProject4(GLdouble winx, GLdouble winy, GLdouble winz, GLdouble clipw,
+	      const GLdouble modelMatrix[16], 
+	      const GLdouble projMatrix[16],
+	      const GLint viewport[4],
+	      GLclampd near, GLclampd far,		    
+	      GLdouble *objx, GLdouble *objy, GLdouble *objz,
+	      GLdouble *objw)
+{
+    double finalMatrix[16];
+    double in[4];
+    double out[4];
+
+    __gluMultMatricesd(modelMatrix, projMatrix, finalMatrix);
+    if (!__gluInvertMatrixd(finalMatrix, finalMatrix)) return(GL_FALSE);
+
+    in[0]=winx;
+    in[1]=winy;
+    in[2]=winz;
+    in[3]=clipw;
+
+    /* Map x and y from window coordinates */
+    in[0] = (in[0] - viewport[0]) / viewport[2];
+    in[1] = (in[1] - viewport[1]) / viewport[3];
+    in[2] = (in[2] - near) / (far - near);
+
+    /* Map to range -1 to 1 */
+    in[0] = in[0] * 2 - 1;
+    in[1] = in[1] * 2 - 1;
+    in[2] = in[2] * 2 - 1;
+
+    __gluMultMatrixVecd(finalMatrix, in, out);
+    if (out[3] == 0.0) return(GL_FALSE);
+    *objx = out[0];
+    *objy = out[1];
+    *objz = out[2];
+    *objw = out[3];
+    return(GL_TRUE);
+}
+
+void GLAPIENTRY
+gluPickMatrix(GLdouble x, GLdouble y, GLdouble deltax, GLdouble deltay,
+		  GLint viewport[4])
+{
+    if (deltax <= 0 || deltay <= 0) { 
+	return;
+    }
+
+    /* Translate and scale the picked region to the entire window */
+    glTranslatef((viewport[2] - 2 * (x - viewport[0])) / deltax,
+	    (viewport[3] - 2 * (y - viewport[1])) / deltay, 0);
+    glScalef(viewport[2] / deltax, viewport[3] / deltay, 1.0);
+}
diff --git a/src/glu/sgi/libutil/quad.c b/src/glu/sgi/libutil/quad.c
new file mode 100644
index 00000000000..84a4d7161a3
--- /dev/null
+++ b/src/glu/sgi/libutil/quad.c
@@ -0,0 +1,1164 @@
+/*
+** 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.
+**
+** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libutil/quad.c,v 1.1 2001/03/17 00:25:41 brianp Exp $
+*/
+
+#include "gluos.h"
+#include "gluint.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+/* Make it not a power of two to avoid cache thrashing on the chip */
+#define CACHE_SIZE	240
+
+#define PI            3.14159265358979323846
+
+struct GLUquadric {
+    GLint 	normals;
+    GLboolean	textureCoords;
+    GLint	orientation;
+    GLint	drawStyle;
+    void	(GLAPIENTRY *errorCallback)( GLint );
+};
+
+GLUquadric * GLAPIENTRY
+gluNewQuadric(void)
+{
+    GLUquadric *newstate;
+
+    newstate = (GLUquadric *) malloc(sizeof(GLUquadric));
+    if (newstate == NULL) {
+	/* Can't report an error at this point... */
+	return NULL;
+    }
+    newstate->normals = GLU_SMOOTH;
+    newstate->textureCoords = GL_FALSE;
+    newstate->orientation = GLU_OUTSIDE;
+    newstate->drawStyle = GLU_FILL;
+    newstate->errorCallback = NULL; 
+    return newstate;
+}
+
+
+void GLAPIENTRY
+gluDeleteQuadric(GLUquadric *state)
+{
+    free(state);
+}
+
+static void gluQuadricError(GLUquadric *qobj, GLenum which)
+{
+    if (qobj->errorCallback) {
+	qobj->errorCallback(which);
+    }
+}
+
+void GLAPIENTRY
+gluQuadricCallback(GLUquadric *qobj, GLenum which, void (GLAPIENTRY *fn)())
+{
+    switch (which) {
+      case GLU_ERROR:
+	qobj->errorCallback = (void (GLAPIENTRY *)(GLint)) fn;
+	break;
+      default:
+	gluQuadricError(qobj, GLU_INVALID_ENUM);
+	return;
+    }
+}
+
+void GLAPIENTRY
+gluQuadricNormals(GLUquadric *qobj, GLenum normals)
+{
+    switch (normals) {
+      case GLU_SMOOTH:
+      case GLU_FLAT:
+      case GLU_NONE:
+	break;
+      default:
+	gluQuadricError(qobj, GLU_INVALID_ENUM);
+	return;
+    }
+    qobj->normals = normals;
+}
+
+void GLAPIENTRY
+gluQuadricTexture(GLUquadric *qobj, GLboolean textureCoords)
+{
+    qobj->textureCoords = textureCoords;
+}
+
+void GLAPIENTRY
+gluQuadricOrientation(GLUquadric *qobj, GLenum orientation)
+{
+    switch(orientation) {
+      case GLU_OUTSIDE:
+      case GLU_INSIDE:
+	break;
+      default:
+	gluQuadricError(qobj, GLU_INVALID_ENUM);
+	return;
+    }
+    qobj->orientation = orientation;
+}
+
+void GLAPIENTRY
+gluQuadricDrawStyle(GLUquadric *qobj, GLenum drawStyle)
+{
+    switch(drawStyle) {
+      case GLU_POINT:
+      case GLU_LINE:
+      case GLU_FILL:
+      case GLU_SILHOUETTE:
+	break;
+      default:
+	gluQuadricError(qobj, GLU_INVALID_ENUM);
+	return;
+    }
+    qobj->drawStyle = drawStyle;
+}
+
+void GLAPIENTRY
+gluCylinder(GLUquadric *qobj, GLdouble baseRadius, GLdouble topRadius, 
+		GLdouble height, GLint slices, GLint stacks)
+{
+    GLint i,j,max;
+    GLfloat sinCache[CACHE_SIZE];
+    GLfloat cosCache[CACHE_SIZE];
+    GLfloat sinCache2[CACHE_SIZE];
+    GLfloat cosCache2[CACHE_SIZE];
+    GLfloat sinCache3[CACHE_SIZE];
+    GLfloat cosCache3[CACHE_SIZE];
+    GLfloat angle;
+    GLfloat x, y, zLow, zHigh;
+    GLfloat sintemp, costemp;
+    GLfloat length;
+    GLfloat deltaRadius;
+    GLfloat zNormal;
+    GLfloat xyNormalRatio;
+    GLfloat radiusLow, radiusHigh;
+    int needCache2, needCache3;
+
+    if (slices >= CACHE_SIZE) slices = CACHE_SIZE-1;
+
+    if (slices < 2 || stacks < 1 || baseRadius < 0.0 || topRadius < 0.0 ||
+	    height < 0.0) {
+	gluQuadricError(qobj, GLU_INVALID_VALUE);
+	return;
+    }
+
+    /* Compute length (needed for normal calculations) */
+    deltaRadius = baseRadius - topRadius;
+    length = SQRT(deltaRadius*deltaRadius + height*height);
+    if (length == 0.0) {
+	gluQuadricError(qobj, GLU_INVALID_VALUE);
+	return;
+    }
+
+    /* Cache is the vertex locations cache */
+    /* Cache2 is the various normals at the vertices themselves */
+    /* Cache3 is the various normals for the faces */
+    needCache2 = needCache3 = 0;
+    if (qobj->normals == GLU_SMOOTH) {
+	needCache2 = 1;
+    }
+
+    if (qobj->normals == GLU_FLAT) {
+	if (qobj->drawStyle != GLU_POINT) {
+	    needCache3 = 1;
+	}
+	if (qobj->drawStyle == GLU_LINE) {
+	    needCache2 = 1;
+	}
+    }
+
+    zNormal = deltaRadius / length;
+    xyNormalRatio = height / length;
+
+    for (i = 0; i < slices; i++) {
+	angle = 2 * PI * i / slices;
+	if (needCache2) {
+	    if (qobj->orientation == GLU_OUTSIDE) {
+		sinCache2[i] = xyNormalRatio * SIN(angle);
+		cosCache2[i] = xyNormalRatio * COS(angle);
+	    } else {
+		sinCache2[i] = -xyNormalRatio * SIN(angle);
+		cosCache2[i] = -xyNormalRatio * COS(angle);
+	    }
+	} 
+	sinCache[i] = SIN(angle);
+	cosCache[i] = COS(angle);
+    }
+
+    if (needCache3) {
+	for (i = 0; i < slices; i++) {
+	    angle = 2 * PI * (i-0.5) / slices;
+	    if (qobj->orientation == GLU_OUTSIDE) {
+		sinCache3[i] = xyNormalRatio * SIN(angle);
+		cosCache3[i] = xyNormalRatio * COS(angle);
+	    } else {
+		sinCache3[i] = -xyNormalRatio * SIN(angle);
+		cosCache3[i] = -xyNormalRatio * COS(angle);
+	    }
+	}
+    } 
+
+    sinCache[slices] = sinCache[0];
+    cosCache[slices] = cosCache[0];
+    if (needCache2) {
+	sinCache2[slices] = sinCache2[0];
+	cosCache2[slices] = cosCache2[0];
+    }
+    if (needCache3) {
+	sinCache3[slices] = sinCache3[0];
+	cosCache3[slices] = cosCache3[0];
+    }
+
+    switch (qobj->drawStyle) {
+      case GLU_FILL:
+	/* Note:
+	** An argument could be made for using a TRIANGLE_FAN for the end
+	** of the cylinder of either radii is 0.0 (a cone).  However, a 
+	** TRIANGLE_FAN would not work in smooth shading mode (the common 
+	** case) because the normal for the apex is different for every
+	** triangle (and TRIANGLE_FAN doesn't let me respecify that normal).
+	** Now, my choice is GL_TRIANGLES, or leave the GL_QUAD_STRIP and
+	** just let the GL trivially reject one of the two triangles of the
+	** QUAD.  GL_QUAD_STRIP is probably faster, so I will leave this code
+	** alone.
+	*/
+	for (j = 0; j < stacks; j++) {
+	    zLow = j * height / stacks;
+	    zHigh = (j + 1) * height / stacks;
+	    radiusLow = baseRadius - deltaRadius * ((float) j / stacks);
+	    radiusHigh = baseRadius - deltaRadius * ((float) (j + 1) / stacks);
+
+	    glBegin(GL_QUAD_STRIP);
+	    for (i = 0; i <= slices; i++) {
+		switch(qobj->normals) {
+		  case GLU_FLAT:
+		    glNormal3f(sinCache3[i], cosCache3[i], zNormal);
+		    break;
+		  case GLU_SMOOTH:
+		    glNormal3f(sinCache2[i], cosCache2[i], zNormal);
+		    break;
+		  case GLU_NONE:
+		  default:
+		    break;
+		}
+		if (qobj->orientation == GLU_OUTSIDE) {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(1 - (float) i / slices,
+				(float) j / stacks);
+		    }
+		    glVertex3f(radiusLow * sinCache[i], 
+			    radiusLow * cosCache[i], zLow);
+		    if (qobj->textureCoords) {
+			glTexCoord2f(1 - (float) i / slices,
+				(float) (j+1) / stacks);
+		    }
+		    glVertex3f(radiusHigh * sinCache[i], 
+			    radiusHigh * cosCache[i], zHigh);
+		} else {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(1 - (float) i / slices,
+				(float) (j+1) / stacks);
+		    }
+		    glVertex3f(radiusHigh * sinCache[i], 
+			    radiusHigh * cosCache[i], zHigh);
+		    if (qobj->textureCoords) {
+			glTexCoord2f(1 - (float) i / slices,
+				(float) j / stacks);
+		    }
+		    glVertex3f(radiusLow * sinCache[i], 
+			    radiusLow * cosCache[i], zLow);
+		}
+	    }
+	    glEnd();
+	}
+	break;
+      case GLU_POINT:
+	glBegin(GL_POINTS);
+	for (i = 0; i < slices; i++) {
+	    switch(qobj->normals) {
+	      case GLU_FLAT:
+	      case GLU_SMOOTH:
+		glNormal3f(sinCache2[i], cosCache2[i], zNormal);
+		break;
+	      case GLU_NONE:
+	      default:
+		break;
+	    }
+	    sintemp = sinCache[i];
+	    costemp = cosCache[i];
+	    for (j = 0; j <= stacks; j++) {
+		zLow = j * height / stacks;
+		radiusLow = baseRadius - deltaRadius * ((float) j / stacks);
+
+		if (qobj->textureCoords) {
+		    glTexCoord2f(1 - (float) i / slices,
+			    (float) j / stacks);
+		}
+		glVertex3f(radiusLow * sintemp, 
+			radiusLow * costemp, zLow);
+	    }
+	}
+	glEnd();
+	break;
+      case GLU_LINE:
+	for (j = 1; j < stacks; j++) {
+	    zLow = j * height / stacks;
+	    radiusLow = baseRadius - deltaRadius * ((float) j / stacks);
+
+	    glBegin(GL_LINE_STRIP);
+	    for (i = 0; i <= slices; i++) {
+		switch(qobj->normals) {
+		  case GLU_FLAT:
+		    glNormal3f(sinCache3[i], cosCache3[i], zNormal);
+		    break;
+		  case GLU_SMOOTH:
+		    glNormal3f(sinCache2[i], cosCache2[i], zNormal);
+		    break;
+		  case GLU_NONE:
+		  default:
+		    break;
+		}
+		if (qobj->textureCoords) {
+		    glTexCoord2f(1 - (float) i / slices,
+			    (float) j / stacks);
+		}
+		glVertex3f(radiusLow * sinCache[i], 
+			radiusLow * cosCache[i], zLow);
+	    }
+	    glEnd();
+	}
+	/* Intentionally fall through here... */
+      case GLU_SILHOUETTE:
+	for (j = 0; j <= stacks; j += stacks) {
+	    zLow = j * height / stacks;
+	    radiusLow = baseRadius - deltaRadius * ((float) j / stacks);
+
+	    glBegin(GL_LINE_STRIP);
+	    for (i = 0; i <= slices; i++) {
+		switch(qobj->normals) {
+		  case GLU_FLAT:
+		    glNormal3f(sinCache3[i], cosCache3[i], zNormal);
+		    break;
+		  case GLU_SMOOTH:
+		    glNormal3f(sinCache2[i], cosCache2[i], zNormal);
+		    break;
+		  case GLU_NONE:
+		  default:
+		    break;
+		}
+		if (qobj->textureCoords) {
+		    glTexCoord2f(1 - (float) i / slices,
+			    (float) j / stacks);
+		}
+		glVertex3f(radiusLow * sinCache[i], radiusLow * cosCache[i], 
+			zLow);
+	    }
+	    glEnd();
+	}
+	for (i = 0; i < slices; i++) {
+	    switch(qobj->normals) {
+	      case GLU_FLAT:
+	      case GLU_SMOOTH:
+		glNormal3f(sinCache2[i], cosCache2[i], 0.0);
+		break;
+	      case GLU_NONE:
+	      default:
+		break;
+	    }
+	    sintemp = sinCache[i];
+	    costemp = cosCache[i];
+	    glBegin(GL_LINE_STRIP);
+	    for (j = 0; j <= stacks; j++) {
+		zLow = j * height / stacks;
+		radiusLow = baseRadius - deltaRadius * ((float) j / stacks);
+
+		if (qobj->textureCoords) {
+		    glTexCoord2f(1 - (float) i / slices,
+			    (float) j / stacks);
+		}
+		glVertex3f(radiusLow * sintemp, 
+			radiusLow * costemp, zLow);
+	    }
+	    glEnd();
+	}
+	break;
+      default:
+	break;
+    }
+}
+
+void GLAPIENTRY
+gluDisk(GLUquadric *qobj, GLdouble innerRadius, GLdouble outerRadius, 
+	    GLint slices, GLint loops)
+{
+    gluPartialDisk(qobj, innerRadius, outerRadius, slices, loops, 0.0, 360.0);
+}
+
+void GLAPIENTRY
+gluPartialDisk(GLUquadric *qobj, GLdouble innerRadius, 
+		   GLdouble outerRadius, GLint slices, GLint loops,
+		   GLdouble startAngle, GLdouble sweepAngle)
+{
+    GLint i,j,max;
+    GLfloat sinCache[CACHE_SIZE];
+    GLfloat cosCache[CACHE_SIZE];
+    GLfloat angle;
+    GLfloat x, y;
+    GLfloat sintemp, costemp;
+    GLfloat deltaRadius;
+    GLfloat radiusLow, radiusHigh;
+    GLfloat texLow, texHigh;
+    GLfloat angleOffset;
+    GLint slices2;
+    GLint finish;
+
+    if (slices >= CACHE_SIZE) slices = CACHE_SIZE-1;
+    if (slices < 2 || loops < 1 || outerRadius <= 0.0 || innerRadius < 0.0 ||
+	    innerRadius > outerRadius) {
+	gluQuadricError(qobj, GLU_INVALID_VALUE);
+	return;
+    }
+
+    if (sweepAngle < -360.0) sweepAngle = 360.0;
+    if (sweepAngle > 360.0) sweepAngle = 360.0;
+    if (sweepAngle < 0) {
+	startAngle += sweepAngle;
+	sweepAngle = -sweepAngle;
+    }
+
+    if (sweepAngle == 360.0) {
+	slices2 = slices;
+    } else {
+	slices2 = slices + 1;
+    }
+
+    /* Compute length (needed for normal calculations) */
+    deltaRadius = outerRadius - innerRadius;
+
+    /* Cache is the vertex locations cache */
+
+    angleOffset = startAngle / 180.0 * PI;
+    for (i = 0; i <= slices; i++) {
+	angle = angleOffset + ((PI * sweepAngle) / 180.0) * i / slices;
+	sinCache[i] = SIN(angle);
+	cosCache[i] = COS(angle);
+    }
+
+    if (sweepAngle == 360.0) {
+	sinCache[slices] = sinCache[0];
+	cosCache[slices] = cosCache[0];
+    }
+
+    switch(qobj->normals) {
+      case GLU_FLAT:
+      case GLU_SMOOTH:
+	if (qobj->orientation == GLU_OUTSIDE) {
+	    glNormal3f(0.0, 0.0, 1.0);
+	} else {
+	    glNormal3f(0.0, 0.0, -1.0);
+	}
+	break;
+      default:
+      case GLU_NONE:
+	break;
+    }
+
+    switch (qobj->drawStyle) {
+      case GLU_FILL:
+	if (innerRadius == 0.0) {
+	    finish = loops - 1;
+	    /* Triangle strip for inner polygons */
+	    glBegin(GL_TRIANGLE_FAN);
+	    if (qobj->textureCoords) {
+		glTexCoord2f(0.5, 0.5);
+	    }
+	    glVertex3f(0.0, 0.0, 0.0);
+	    radiusLow = outerRadius - 
+		    deltaRadius * ((float) (loops-1) / loops);
+	    if (qobj->textureCoords) {
+		texLow = radiusLow / outerRadius / 2;
+	    }
+
+	    if (qobj->orientation == GLU_OUTSIDE) {
+		for (i = slices; i >= 0; i--) {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(texLow * sinCache[i] + 0.5,
+				texLow * cosCache[i] + 0.5);
+		    }
+		    glVertex3f(radiusLow * sinCache[i], 
+			    radiusLow * cosCache[i], 0.0);
+		}
+	    } else {
+		for (i = 0; i <= slices; i++) {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(texLow * sinCache[i] + 0.5,
+				texLow * cosCache[i] + 0.5);
+		    }
+		    glVertex3f(radiusLow * sinCache[i], 
+			    radiusLow * cosCache[i], 0.0);
+		}
+	    }
+	    glEnd();
+	} else {
+	    finish = loops;
+	}
+	for (j = 0; j < finish; j++) {
+	    radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+	    radiusHigh = outerRadius - deltaRadius * ((float) (j + 1) / loops);
+	    if (qobj->textureCoords) {
+		texLow = radiusLow / outerRadius / 2;
+		texHigh = radiusHigh / outerRadius / 2;
+	    }
+
+	    glBegin(GL_QUAD_STRIP);
+	    for (i = 0; i <= slices; i++) {
+		if (qobj->orientation == GLU_OUTSIDE) {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(texLow * sinCache[i] + 0.5,
+				texLow * cosCache[i] + 0.5);
+		    }
+		    glVertex3f(radiusLow * sinCache[i], 
+			    radiusLow * cosCache[i], 0.0);
+
+		    if (qobj->textureCoords) {
+			glTexCoord2f(texHigh * sinCache[i] + 0.5,
+				texHigh * cosCache[i] + 0.5);
+		    }
+		    glVertex3f(radiusHigh * sinCache[i], 
+			    radiusHigh * cosCache[i], 0.0);
+		} else {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(texHigh * sinCache[i] + 0.5,
+				texHigh * cosCache[i] + 0.5);
+		    }
+		    glVertex3f(radiusHigh * sinCache[i], 
+			    radiusHigh * cosCache[i], 0.0);
+
+		    if (qobj->textureCoords) {
+			glTexCoord2f(texLow * sinCache[i] + 0.5,
+				texLow * cosCache[i] + 0.5);
+		    }
+		    glVertex3f(radiusLow * sinCache[i], 
+			    radiusLow * cosCache[i], 0.0);
+		}
+	    }
+	    glEnd();
+	}
+	break;
+      case GLU_POINT:
+	glBegin(GL_POINTS);
+	for (i = 0; i < slices2; i++) {
+	    sintemp = sinCache[i];
+	    costemp = cosCache[i];
+	    for (j = 0; j <= loops; j++) {
+		radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+
+		if (qobj->textureCoords) {
+		    texLow = radiusLow / outerRadius / 2;
+
+		    glTexCoord2f(texLow * sinCache[i] + 0.5,
+			    texLow * cosCache[i] + 0.5);
+		}
+		glVertex3f(radiusLow * sintemp, radiusLow * costemp, 0.0);
+	    }
+	}
+	glEnd();
+	break;
+      case GLU_LINE:
+	if (innerRadius == outerRadius) {
+	    glBegin(GL_LINE_STRIP);
+
+	    for (i = 0; i <= slices; i++) {
+		if (qobj->textureCoords) {
+		    glTexCoord2f(sinCache[i] / 2 + 0.5,
+			    cosCache[i] / 2 + 0.5);
+		}
+		glVertex3f(innerRadius * sinCache[i],
+			innerRadius * cosCache[i], 0.0);
+	    }
+	    glEnd();
+	    break;
+	}
+	for (j = 0; j <= loops; j++) {
+	    radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+	    if (qobj->textureCoords) {
+		texLow = radiusLow / outerRadius / 2;
+	    }
+
+	    glBegin(GL_LINE_STRIP);
+	    for (i = 0; i <= slices; i++) {
+		if (qobj->textureCoords) {
+		    glTexCoord2f(texLow * sinCache[i] + 0.5,
+			    texLow * cosCache[i] + 0.5);
+		}
+		glVertex3f(radiusLow * sinCache[i], 
+			radiusLow * cosCache[i], 0.0);
+	    }
+	    glEnd();
+	}
+	for (i=0; i < slices2; i++) {
+	    sintemp = sinCache[i];
+	    costemp = cosCache[i];
+	    glBegin(GL_LINE_STRIP);
+	    for (j = 0; j <= loops; j++) {
+		radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+		if (qobj->textureCoords) {
+		    texLow = radiusLow / outerRadius / 2;
+		}
+
+		if (qobj->textureCoords) {
+		    glTexCoord2f(texLow * sinCache[i] + 0.5,
+			    texLow * cosCache[i] + 0.5);
+		}
+		glVertex3f(radiusLow * sintemp, radiusLow * costemp, 0.0);
+	    }
+	    glEnd();
+	}
+	break;
+      case GLU_SILHOUETTE:
+	if (sweepAngle < 360.0) {
+	    for (i = 0; i <= slices; i+= slices) {
+		sintemp = sinCache[i];
+		costemp = cosCache[i];
+		glBegin(GL_LINE_STRIP);
+		for (j = 0; j <= loops; j++) {
+		    radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+
+		    if (qobj->textureCoords) {
+			texLow = radiusLow / outerRadius / 2;
+			glTexCoord2f(texLow * sinCache[i] + 0.5,
+				texLow * cosCache[i] + 0.5);
+		    }
+		    glVertex3f(radiusLow * sintemp, radiusLow * costemp, 0.0);
+		}
+		glEnd();
+	    }
+	}
+	for (j = 0; j <= loops; j += loops) {
+	    radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+	    if (qobj->textureCoords) {
+		texLow = radiusLow / outerRadius / 2;
+	    }
+
+	    glBegin(GL_LINE_STRIP);
+	    for (i = 0; i <= slices; i++) {
+		if (qobj->textureCoords) {
+		    glTexCoord2f(texLow * sinCache[i] + 0.5,
+			    texLow * cosCache[i] + 0.5);
+		}
+		glVertex3f(radiusLow * sinCache[i], 
+			radiusLow * cosCache[i], 0.0);
+	    }
+	    glEnd();
+	    if (innerRadius == outerRadius) break;
+	}
+	break;
+      default:
+	break;
+    }
+}
+
+void GLAPIENTRY
+gluSphere(GLUquadric *qobj, GLdouble radius, GLint slices, GLint stacks)
+{
+    GLint i,j,max;
+    GLfloat sinCache1a[CACHE_SIZE];
+    GLfloat cosCache1a[CACHE_SIZE];
+    GLfloat sinCache2a[CACHE_SIZE];
+    GLfloat cosCache2a[CACHE_SIZE];
+    GLfloat sinCache3a[CACHE_SIZE];
+    GLfloat cosCache3a[CACHE_SIZE];
+    GLfloat sinCache1b[CACHE_SIZE];
+    GLfloat cosCache1b[CACHE_SIZE];
+    GLfloat sinCache2b[CACHE_SIZE];
+    GLfloat cosCache2b[CACHE_SIZE];
+    GLfloat sinCache3b[CACHE_SIZE];
+    GLfloat cosCache3b[CACHE_SIZE];
+    GLfloat angle;
+    GLfloat x, y, zLow, zHigh;
+    GLfloat sintemp1, sintemp2, sintemp3, sintemp4;
+    GLfloat costemp1, costemp2, costemp3, costemp4;
+    GLfloat zNormal;
+    GLfloat xyNormalRatio;
+    GLboolean needCache2, needCache3;
+    GLint start, finish;
+
+    if (slices >= CACHE_SIZE) slices = CACHE_SIZE-1;
+    if (stacks >= CACHE_SIZE) stacks = CACHE_SIZE-1;
+    if (slices < 2 || stacks < 1 || radius < 0.0) {
+	gluQuadricError(qobj, GLU_INVALID_VALUE);
+	return;
+    }
+
+    /* Cache is the vertex locations cache */
+    /* Cache2 is the various normals at the vertices themselves */
+    /* Cache3 is the various normals for the faces */
+    needCache2 = needCache3 = GL_FALSE;
+
+    if (qobj->normals == GLU_SMOOTH) {
+	needCache2 = GL_TRUE;
+    }
+
+    if (qobj->normals == GLU_FLAT) {
+	if (qobj->drawStyle != GLU_POINT) {
+	    needCache3 = GL_TRUE;
+	}
+	if (qobj->drawStyle == GLU_LINE) {
+	    needCache2 = GL_TRUE;
+	}
+    }
+
+    for (i = 0; i < slices; i++) {
+	angle = 2 * PI * i / slices;
+	sinCache1a[i] = SIN(angle);
+	cosCache1a[i] = COS(angle);
+	if (needCache2) {
+	    sinCache2a[i] = sinCache1a[i];
+	    cosCache2a[i] = cosCache1a[i];
+	}
+    }
+
+    for (j = 0; j <= stacks; j++) {
+	angle = PI * j / stacks;
+	if (needCache2) {
+	    if (qobj->orientation == GLU_OUTSIDE) {
+		sinCache2b[j] = SIN(angle);
+		cosCache2b[j] = COS(angle);
+	    } else {
+		sinCache2b[j] = -SIN(angle);
+		cosCache2b[j] = -COS(angle);
+	    }
+	}
+	sinCache1b[j] = radius * SIN(angle);
+	cosCache1b[j] = radius * COS(angle);
+    }
+    /* Make sure it comes to a point */
+    sinCache1b[0] = 0;
+    sinCache1b[stacks] = 0;
+
+    if (needCache3) {
+	for (i = 0; i < slices; i++) {
+	    angle = 2 * PI * (i-0.5) / slices;
+	    sinCache3a[i] = SIN(angle);
+	    cosCache3a[i] = COS(angle);
+	}
+	for (j = 0; j <= stacks; j++) {
+	    angle = PI * (j - 0.5) / stacks;
+	    if (qobj->orientation == GLU_OUTSIDE) {
+		sinCache3b[j] = SIN(angle);
+		cosCache3b[j] = COS(angle);
+	    } else {
+		sinCache3b[j] = -SIN(angle);
+		cosCache3b[j] = -COS(angle);
+	    }
+	}
+    } 
+
+    sinCache1a[slices] = sinCache1a[0];
+    cosCache1a[slices] = cosCache1a[0];
+    if (needCache2) {
+	sinCache2a[slices] = sinCache2a[0];
+	cosCache2a[slices] = cosCache2a[0];
+    }
+    if (needCache3) {
+	sinCache3a[slices] = sinCache3a[0];
+	cosCache3a[slices] = cosCache3a[0];
+    }
+
+    switch (qobj->drawStyle) {
+      case GLU_FILL:
+	/* Do ends of sphere as TRIANGLE_FAN's (if not texturing)
+	** We don't do it when texturing because we need to respecify the
+	** texture coordinates of the apex for every adjacent vertex (because
+	** it isn't a constant for that point)
+	*/
+	if (!(qobj->textureCoords)) {
+	    start = 1;
+	    finish = stacks - 1;
+
+	    /* Low end first (j == 0 iteration) */
+	    sintemp2 = sinCache1b[1];
+	    zHigh = cosCache1b[1];
+	    switch(qobj->normals) {
+	      case GLU_FLAT:
+		sintemp3 = sinCache3b[1];
+		costemp3 = cosCache3b[1];
+		break;
+	      case GLU_SMOOTH:
+		sintemp3 = sinCache2b[1];
+		costemp3 = cosCache2b[1];
+		glNormal3f(sinCache2a[0] * sinCache2b[0],
+			cosCache2a[0] * sinCache2b[0],
+			cosCache2b[0]);
+		break;
+	      default:
+		break;
+	    }
+	    glBegin(GL_TRIANGLE_FAN);
+	    glVertex3f(0.0, 0.0, radius);
+	    if (qobj->orientation == GLU_OUTSIDE) {
+		for (i = slices; i >= 0; i--) {
+		    switch(qobj->normals) {
+		      case GLU_SMOOTH:
+			glNormal3f(sinCache2a[i] * sintemp3,
+				cosCache2a[i] * sintemp3,
+				costemp3);
+			break;
+		      case GLU_FLAT:
+			if (i != slices) {
+			    glNormal3f(sinCache3a[i+1] * sintemp3,
+				    cosCache3a[i+1] * sintemp3,
+				    costemp3);
+			}
+			break;
+		      case GLU_NONE:
+		      default:
+			break;
+		    }
+		    glVertex3f(sintemp2 * sinCache1a[i],
+			    sintemp2 * cosCache1a[i], zHigh);
+		}
+	    } else {
+		for (i = 0; i <= slices; i++) {
+		    switch(qobj->normals) {
+		      case GLU_SMOOTH:
+			glNormal3f(sinCache2a[i] * sintemp3,
+				cosCache2a[i] * sintemp3,
+				costemp3);
+			break;
+		      case GLU_FLAT:
+			glNormal3f(sinCache3a[i] * sintemp3,
+				cosCache3a[i] * sintemp3,
+				costemp3);
+			break;
+		      case GLU_NONE:
+		      default:
+			break;
+		    }
+		    glVertex3f(sintemp2 * sinCache1a[i],
+			    sintemp2 * cosCache1a[i], zHigh);
+		}
+	    }
+	    glEnd();
+
+	    /* High end next (j == stacks-1 iteration) */
+	    sintemp2 = sinCache1b[stacks-1];
+	    zHigh = cosCache1b[stacks-1];
+	    switch(qobj->normals) {
+	      case GLU_FLAT:
+		sintemp3 = sinCache3b[stacks];
+		costemp3 = cosCache3b[stacks];
+		break;
+	      case GLU_SMOOTH:
+		sintemp3 = sinCache2b[stacks-1];
+		costemp3 = cosCache2b[stacks-1];
+		glNormal3f(sinCache2a[stacks] * sinCache2b[stacks],
+			cosCache2a[stacks] * sinCache2b[stacks],
+			cosCache2b[stacks]);
+		break;
+	      default:
+		break;
+	    }
+	    glBegin(GL_TRIANGLE_FAN);
+	    glVertex3f(0.0, 0.0, -radius);
+	    if (qobj->orientation == GLU_OUTSIDE) {
+		for (i = 0; i <= slices; i++) {
+		    switch(qobj->normals) {
+		      case GLU_SMOOTH:
+			glNormal3f(sinCache2a[i] * sintemp3,
+				cosCache2a[i] * sintemp3,
+				costemp3);
+			break;
+		      case GLU_FLAT:
+			glNormal3f(sinCache3a[i] * sintemp3,
+				cosCache3a[i] * sintemp3,
+				costemp3);
+			break;
+		      case GLU_NONE:
+		      default:
+			break;
+		    }
+		    glVertex3f(sintemp2 * sinCache1a[i],
+			    sintemp2 * cosCache1a[i], zHigh);
+		}
+	    } else {
+		for (i = slices; i >= 0; i--) {
+		    switch(qobj->normals) {
+		      case GLU_SMOOTH:
+			glNormal3f(sinCache2a[i] * sintemp3,
+				cosCache2a[i] * sintemp3,
+				costemp3);
+			break;
+		      case GLU_FLAT:
+			if (i != slices) {
+			    glNormal3f(sinCache3a[i+1] * sintemp3,
+				    cosCache3a[i+1] * sintemp3,
+				    costemp3);
+			}
+			break;
+		      case GLU_NONE:
+		      default:
+			break;
+		    }
+		    glVertex3f(sintemp2 * sinCache1a[i],
+			    sintemp2 * cosCache1a[i], zHigh);
+		}
+	    }
+	    glEnd();
+	} else {
+	    start = 0;
+	    finish = stacks;
+	}
+	for (j = start; j < finish; j++) {
+	    zLow = cosCache1b[j];
+	    zHigh = cosCache1b[j+1];
+	    sintemp1 = sinCache1b[j];
+	    sintemp2 = sinCache1b[j+1];
+	    switch(qobj->normals) {
+	      case GLU_FLAT:
+		sintemp4 = sinCache3b[j+1];
+		costemp4 = cosCache3b[j+1];
+		break;
+	      case GLU_SMOOTH:
+		if (qobj->orientation == GLU_OUTSIDE) {
+		    sintemp3 = sinCache2b[j+1];
+		    costemp3 = cosCache2b[j+1];
+		    sintemp4 = sinCache2b[j];
+		    costemp4 = cosCache2b[j];
+		} else {
+		    sintemp3 = sinCache2b[j];
+		    costemp3 = cosCache2b[j];
+		    sintemp4 = sinCache2b[j+1];
+		    costemp4 = cosCache2b[j+1];
+		}
+		break;
+	      default:
+	        break;
+	    }
+
+	    glBegin(GL_QUAD_STRIP);
+	    for (i = 0; i <= slices; i++) {
+		switch(qobj->normals) {
+		  case GLU_SMOOTH:
+		    glNormal3f(sinCache2a[i] * sintemp3,
+			    cosCache2a[i] * sintemp3,
+			    costemp3);
+		    break;
+		  case GLU_FLAT:
+		  case GLU_NONE:
+		  default:
+		    break;
+		}
+		if (qobj->orientation == GLU_OUTSIDE) {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(1 - (float) i / slices,
+				1 - (float) (j+1) / stacks);
+		    }
+		    glVertex3f(sintemp2 * sinCache1a[i],
+			    sintemp2 * cosCache1a[i], zHigh);
+		} else {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(1 - (float) i / slices,
+				1 - (float) j / stacks);
+		    }
+		    glVertex3f(sintemp1 * sinCache1a[i],
+			    sintemp1 * cosCache1a[i], zLow);
+		}
+		switch(qobj->normals) {
+		  case GLU_SMOOTH:
+		    glNormal3f(sinCache2a[i] * sintemp4,
+			    cosCache2a[i] * sintemp4,
+			    costemp4);
+		    break;
+		  case GLU_FLAT:
+		    glNormal3f(sinCache3a[i] * sintemp4,
+			    cosCache3a[i] * sintemp4,
+			    costemp4);
+		    break;
+		  case GLU_NONE:
+		  default:
+		    break;
+		}
+		if (qobj->orientation == GLU_OUTSIDE) {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(1 - (float) i / slices,
+				1 - (float) j / stacks);
+		    }
+		    glVertex3f(sintemp1 * sinCache1a[i],
+			    sintemp1 * cosCache1a[i], zLow);
+		} else {
+		    if (qobj->textureCoords) {
+			glTexCoord2f(1 - (float) i / slices,
+				1 - (float) (j+1) / stacks);
+		    }
+		    glVertex3f(sintemp2 * sinCache1a[i],
+			    sintemp2 * cosCache1a[i], zHigh);
+		}
+	    }
+	    glEnd();
+	}
+	break;
+      case GLU_POINT:
+	glBegin(GL_POINTS);
+	for (j = 0; j <= stacks; j++) {
+	    sintemp1 = sinCache1b[j];
+	    costemp1 = cosCache1b[j];
+	    switch(qobj->normals) {
+	      case GLU_FLAT:
+	      case GLU_SMOOTH:
+		sintemp2 = sinCache2b[j];
+		costemp2 = cosCache2b[j];
+		break;
+	      default:
+	        break;
+	    }
+	    for (i = 0; i < slices; i++) {
+		switch(qobj->normals) {
+		  case GLU_FLAT:
+		  case GLU_SMOOTH:
+		    glNormal3f(sinCache2a[i] * sintemp2,
+			    cosCache2a[i] * sintemp2,
+			    costemp2);
+		    break;
+		  case GLU_NONE:
+		  default:
+		    break;
+		}
+
+		zLow = j * radius / stacks;
+
+		if (qobj->textureCoords) {
+		    glTexCoord2f(1 - (float) i / slices,
+			    1 - (float) j / stacks);
+		}
+		glVertex3f(sintemp1 * sinCache1a[i], 
+			sintemp1 * cosCache1a[i], costemp1);
+	    }
+	}
+	glEnd();
+	break;
+      case GLU_LINE:
+      case GLU_SILHOUETTE:
+	for (j = 1; j < stacks; j++) {
+	    sintemp1 = sinCache1b[j];
+	    costemp1 = cosCache1b[j];
+	    switch(qobj->normals) {
+	      case GLU_FLAT:
+	      case GLU_SMOOTH:
+		sintemp2 = sinCache2b[j];
+		costemp2 = cosCache2b[j];
+		break;
+	      default:
+		break;
+	    }
+
+	    glBegin(GL_LINE_STRIP);
+	    for (i = 0; i <= slices; i++) {
+		switch(qobj->normals) {
+		  case GLU_FLAT:
+		    glNormal3f(sinCache3a[i] * sintemp2,
+			    cosCache3a[i] * sintemp2,
+			    costemp2);
+		    break;
+		  case GLU_SMOOTH:
+		    glNormal3f(sinCache2a[i] * sintemp2,
+			    cosCache2a[i] * sintemp2,
+			    costemp2);
+		    break;
+		  case GLU_NONE:
+		  default:
+		    break;
+		}
+		if (qobj->textureCoords) {
+		    glTexCoord2f(1 - (float) i / slices,
+			    1 - (float) j / stacks);
+		}
+		glVertex3f(sintemp1 * sinCache1a[i], 
+			sintemp1 * cosCache1a[i], costemp1);
+	    }
+	    glEnd();
+	}
+	for (i = 0; i < slices; i++) {
+	    sintemp1 = sinCache1a[i];
+	    costemp1 = cosCache1a[i];
+	    switch(qobj->normals) {
+	      case GLU_FLAT:
+	      case GLU_SMOOTH:
+		sintemp2 = sinCache2a[i];
+		costemp2 = cosCache2a[i];
+		break;
+	      default:
+		break;
+	    }
+
+	    glBegin(GL_LINE_STRIP);
+	    for (j = 0; j <= stacks; j++) {
+		switch(qobj->normals) {
+		  case GLU_FLAT:
+		    glNormal3f(sintemp2 * sinCache3b[j],
+			    costemp2 * sinCache3b[j],
+			    cosCache3b[j]);
+		    break;
+		  case GLU_SMOOTH:
+		    glNormal3f(sintemp2 * sinCache2b[j],
+			    costemp2 * sinCache2b[j],
+			    cosCache2b[j]);
+		    break;
+		  case GLU_NONE:
+		  default:
+		    break;
+		}
+
+		if (qobj->textureCoords) {
+		    glTexCoord2f(1 - (float) i / slices,
+			    1 - (float) j / stacks);
+		}
+		glVertex3f(sintemp1 * sinCache1b[j], 
+			costemp1 * sinCache1b[j], cosCache1b[j]);
+	    }
+	    glEnd();
+	}
+	break;
+      default:
+	break;
+    }
+}
diff --git a/src/glu/sgi/libutil/registry.c b/src/glu/sgi/libutil/registry.c
new file mode 100644
index 00000000000..e486ffa8ca9
--- /dev/null
+++ b/src/glu/sgi/libutil/registry.c
@@ -0,0 +1,98 @@
+/*
+** 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.
+**
+** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libutil/registry.c,v 1.1 2001/03/17 00:25:41 brianp Exp $
+*/
+
+#include "gluos.h"
+#include <GL/glu.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static const GLubyte versionString[] = "1.3";
+static const GLubyte extensionString[] =
+    "GLU_EXT_nurbs_tessellator "
+    "GLU_EXT_object_space_tess "
+    ;
+
+const GLubyte * GLAPIENTRY
+gluGetString(GLenum name)
+{
+
+    if (name == GLU_VERSION) {
+	return versionString;
+    } else if (name == GLU_EXTENSIONS) {
+	return extensionString;
+    }
+    return NULL;
+}
+
+/* extName is an extension name.
+ * extString is a string of extensions separated by blank(s). There may or 
+ * may not be leading or trailing blank(s) in extString.
+ * This works in cases of extensions being prefixes of another like
+ * GL_EXT_texture and GL_EXT_texture3D.
+ * Returns GL_TRUE if extName is found otherwise it returns GL_FALSE.
+ */
+GLboolean GLAPIENTRY
+gluCheckExtension(const GLubyte *extName, const GLubyte *extString)
+{
+  GLboolean flag = GL_FALSE;
+  char *word;
+  char *lookHere;
+  char *deleteThis;
+
+  if (extString == NULL) return GL_FALSE;
+
+  deleteThis = lookHere = (char *)malloc(strlen((const char *)extString)+1); 
+  if (lookHere == NULL)
+     return GL_FALSE;
+  /* strtok() will modify string, so copy it somewhere */
+  strcpy(lookHere,(const char *)extString);
+
+  while ((word= strtok(lookHere," ")) != NULL) {
+     if (strcmp(word,(const char *)extName) == 0) {
+        flag = GL_TRUE;
+	break;
+     }  
+     lookHere = NULL;		/* get next token */
+  }
+  free((void *)deleteThis);
+  return flag;
+} /* gluCheckExtension() */
+
+
+
+/*** registry.c ***/