aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil
diff options
context:
space:
mode:
authorReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
committerReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
commitf4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch)
tree2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil
parenta840692edc9c6d19cd7c057f68e39c7d95eb767d (diff)
downloadnx-libs-f4092abdf94af6a99aff944d6264bc1284e8bdd4.tar.gz
nx-libs-f4092abdf94af6a99aff944d6264bc1284e8bdd4.tar.bz2
nx-libs-f4092abdf94af6a99aff944d6264bc1284e8bdd4.zip
Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository
Diffstat (limited to 'nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil')
-rw-r--r--nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/GNUmakefile68
-rw-r--r--nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/Imakefile57
-rw-r--r--nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/error.c87
-rw-r--r--nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/glue.c100
-rw-r--r--nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/gluint.h55
-rw-r--r--nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/mipmap.c8831
-rw-r--r--nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c379
-rw-r--r--nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/quad.c1162
-rw-r--r--nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/registry.c98
9 files changed, 10837 insertions, 0 deletions
diff --git a/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/GNUmakefile b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/GNUmakefile
new file mode 100644
index 000000000..df1ac2359
--- /dev/null
+++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/GNUmakefile
@@ -0,0 +1,68 @@
+#!gmake
+#
+# 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: 2004/03/14 08:29:11 $ $Revision: 1.1.1.4 $
+# $Header: /cvs/xorg/xc/extras/ogl-sample/main/gfx/lib/glu/libutil/GNUmakefile,v 1.1.1.4 2004/03/14 08:29:11 eich Exp $
+
+OBJECT_STYLE = N32
+
+include $(ROOT)/usr/include/make/commondefs
+
+TARGET = libutil.a
+
+TARGETS = $(TARGET)
+
+LCINCS = -I../include
+
+HFILES = \
+ gluint.h \
+ $(NULL)
+
+CFILES = \
+ error.c \
+ glue.c \
+ mipmap.c \
+ project.c \
+ quad.c \
+ registry.c \
+ $(NULL)
+
+default libs libs_install install: $(TARGET)
+
+headers headers_install apps:
+
+$(TARGET): $(OBJECTS)
+ $(AR) crl $@ $(OBJECTS);
+
+include $(COMMONRULES)
diff --git a/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/Imakefile b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/Imakefile
new file mode 100644
index 000000000..5ffeec402
--- /dev/null
+++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/Imakefile
@@ -0,0 +1,57 @@
+XCOMM License Applicability. Except to the extent portions of this file are
+XCOMM made subject to an alternative license as permitted in the SGI Free
+XCOMM Software License B, Version 1.1 (the "License"), the contents of this
+XCOMM file are subject only to the provisions of the License. You may not use
+XCOMM this file except in compliance with the License. You may obtain a copy
+XCOMM of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+XCOMM Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+XCOMM
+XCOMM http://oss.sgi.com/projects/FreeB
+XCOMM
+XCOMM Note that, as provided in the License, the Software is distributed on an
+XCOMM "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+XCOMM DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+XCOMM CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+XCOMM PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+XCOMM
+XCOMM Original Code. The Original Code is: OpenGL Sample Implementation,
+XCOMM Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+XCOMM Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+XCOMM Copyright in any portions created by third parties is as indicated
+XCOMM elsewhere herein. All Rights Reserved.
+XCOMM
+XCOMM Additional Notice Provisions: The application programming interfaces
+XCOMM established by SGI in conjunction with the Original Code are The
+XCOMM OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+XCOMM April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+XCOMM 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+XCOMM Window System(R) (Version 1.3), released October 19, 1998. This software
+XCOMM was created using the OpenGL(R) version 1.2.1 Sample Implementation
+XCOMM published by SGI, but has not been independently verified as being
+XCOMM compliant with the OpenGL(R) version 1.2.1 Specification.
+XCOMM
+
+#include <Library.tmpl>
+
+OBJS = \
+ error.o \
+ glue.o \
+ mipmap.o \
+ project.o \
+ quad.o \
+ registry.o
+
+INCLUDES = \
+ -I../include \
+ -I$(TOP)/include \
+ -I$(TOP)/include/GL
+
+DEFINES = \
+ -DNDEBUG
+
+NormalLibraryObjectRule()
+
+NormalLibraryTarget(util, $(OBJS))
+
+DependTarget()
+CleanTarget()
diff --git a/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/error.c b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/error.c
new file mode 100644
index 000000000..d8426a81b
--- /dev/null
+++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/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: 2004/03/14 08:29:11 $ $Revision: 1.1.1.4 $
+** $Header: /cvs/xorg/xc/extras/ogl-sample/main/gfx/lib/glu/libutil/error.c,v 1.1.1.4 2004/03/14 08:29:11 eich 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/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/glue.c b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/glue.c
new file mode 100644
index 000000000..5455b8544
--- /dev/null
+++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/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: 2004/03/14 08:29:11 $ $Revision: 1.1.1.4 $
+** $Header: /cvs/xorg/xc/extras/ogl-sample/main/gfx/lib/glu/libutil/glue.c,v 1.1.1.4 2004/03/14 08:29:11 eich 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/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/gluint.h b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/gluint.h
new file mode 100644
index 000000000..d3129ee30
--- /dev/null
+++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/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: 2004/03/14 08:29:11 $ $Revision: 1.1.1.4 $
+** $Header: /cvs/xorg/xc/extras/ogl-sample/main/gfx/lib/glu/libutil/gluint.h,v 1.1.1.4 2004/03/14 08:29:11 eich 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/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/mipmap.c b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/mipmap.c
new file mode 100644
index 000000000..d8dfd2ea2
--- /dev/null
+++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/mipmap.c
@@ -0,0 +1,8831 @@
+/*
+** 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.
+**
+*/
+/* $XFree86: xc/extras/ogl-sample/main/gfx/lib/glu/libutil/mipmap.c,v 1.4 2001/10/28 03:32:23 tsi 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;
+ 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;
+ 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;
+ 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;
+ 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;
+ 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 convx;
+ float 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 convx;
+ float 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 convx;
+ float 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 convx;
+ float 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 convx;
+ float 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 convx;
+ float 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 convx;
+ float 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 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;
+#if 0
+ GLint maxsize;
+#endif
+ 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 */
+ __GLU_INIT_SWAP_IMAGE;
+ GLint memreq;
+ 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() */
+
+#if 0
+/*
+** 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;
+#if 0
+ GLint maxsize;
+#endif
+ 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;
+}
+#endif
+
+/*
+ * 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 convx;
+ float 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;
+#if 0
+ const char *temp_index;
+#endif
+ 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 = 0;
+ 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 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;
+ __GLU_INIT_SWAP_IMAGE;
+ GLint memReq;
+ 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/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c
new file mode 100644
index 000000000..fb65e0f17
--- /dev/null
+++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c
@@ -0,0 +1,379 @@
+/* $XFree86: xc/extras/ogl-sample/main/gfx/lib/glu/libutil/project.c,v 1.2 2001/10/28 03:32:24 tsi Exp $ */
+/*
+** 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.
+**
+*/
+
+#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)
+{
+ 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/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/quad.c b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/quad.c
new file mode 100644
index 000000000..3055c6494
--- /dev/null
+++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/quad.c
@@ -0,0 +1,1162 @@
+/*
+** 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.
+**
+*/
+/* $XFree86: xc/extras/ogl-sample/main/gfx/lib/glu/libutil/quad.c,v 1.3tsi 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
+
+#undef PI
+#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,
+ GLvoid (GLAPIENTRY *fn)(GLvoid))
+{
+ 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;
+ 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 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;
+ GLfloat sinCache[CACHE_SIZE];
+ GLfloat cosCache[CACHE_SIZE];
+ GLfloat angle;
+ GLfloat sintemp, costemp;
+ GLfloat deltaRadius;
+ GLfloat radiusLow, radiusHigh;
+ GLfloat texLow = 0, texHigh = 0;
+ 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;
+ 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 zLow, zHigh;
+ GLfloat sintemp1, sintemp2 = 0, sintemp3 = 0, sintemp4 = 0;
+ GLfloat costemp1, costemp2 = 0, costemp3 = 0, costemp4 = 0;
+ 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/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/registry.c b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libutil/registry.c
new file mode 100644
index 000000000..786fab3c3
--- /dev/null
+++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/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: 2004/03/14 08:29:12 $ $Revision: 1.1.1.4 $
+** $Header: /cvs/xorg/xc/extras/ogl-sample/main/gfx/lib/glu/libutil/registry.c,v 1.1.1.4 2004/03/14 08:29:12 eich 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 ***/