_C_ License Applicability. Except to the extent portions of this file are
_C_ made subject to an alternative license as permitted in the SGI Free
_C_ Software License B, Version 1.1 (the "License"), the contents of this
_C_ file are subject only to the provisions of the License. You may not use
_C_ this file except in compliance with the License. You may obtain a copy
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_C_ 
_C_ http://oss.sgi.com/projects/FreeB
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_C_ Note that, as provided in the License, the Software is distributed on an
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_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
_C_ 
_C_ Original Code. The Original Code is: OpenGL Sample Implementation,
_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
_C_ Copyright in any portions created by third parties is as indicated
_C_ elsewhere herein. All Rights Reserved.
_C_ 
_C_ Additional Notice Provisions: The application programming interfaces
_C_ established by SGI in conjunction with the Original Code are The
_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
_C_ Window System(R) (Version 1.3), released October 19, 1998. This software
_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation
_C_ published by SGI, but has not been independently verified as being
_C_ compliant with the OpenGL(R) version 1.2.1 Specification.
_C_
_C_ $Date: 2004/12/14 16:20:38 $ $Revision: 1.1.1.1 $
_C_ The first character in this file must be an '_'!
_C_ Anything on a line after _C_ is ignored
_define(_filters,eqn)_C_
_C_      eqn is automatically replaced with neqn for nroff
_header(ErrorString, produce an error string from a GL or GLU error code)
_names(ErrorString)
.EQ
delim $$
.EN
.SH PARAMETERS
_phead(_param1)
Specifies a GL or GLU error code.
.SH DESCRIPTION
_cmnd produces an error string from a GL or GLU error code. The string
is in ISO Latin 1 format. For example,
_cmnd(ErrorString)(_const(OUT_OF_MEMORY)) returns the string 
\f2out of memory\fP.
.P
The standard GLU error codes are _gluconst(INVALID_ENUM), 
_gluconst(INVALID_VALUE),
and _gluconst(OUT_OF_MEMORY).
Certain other GLU functions can return specialized error codes
through callbacks.
See the _glcmnd(GetError) reference page for the list of 
GL error codes.
.SH ERRORS
_xconst(NULL) is returned if _param1 is not a valid GL or GLU error code.
.SH SEE ALSO
_glcmnd(GetError),
_cmnd(NurbsCallback),
_cmnd(QuadricCallback),
_cmnd(TessCallback)
