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+_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
+_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+_C_ 
+_C_ http://oss.sgi.com/projects/FreeB
+_C_ 
+_C_ Note that, as provided in the License, the Software is distributed on an
+_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+_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_ The first character in this file must be an '_'!
+_C_ Anything on a line after _C_ is ignored
+_define(_filters,tbl)_C_
+_header(Minmax,define minmax table)
+_names(Minmax)
+_define(@<__target>@,@<_param1>@)_C_
+_define(@<__internalformat>@,@<_param2>@)_C_
+_define(@<__sink>@,@<_param3>@)_C_
+.SH PARAMETERS
+_phead(__target)
+The minmax table whose parameters are to be set.
+Must be
+_const(MINMAX).
+_phead(__internalformat)
+The format of entries in the minmax table.
+Must be one of
+_const(ALPHA),
+_const(ALPHA4),
+_const(ALPHA8),
+_const(ALPHA12),
+_const(ALPHA16),
+_const(LUMINANCE),
+_const(LUMINANCE4),
+_const(LUMINANCE8),
+_const(LUMINANCE12),
+_const(LUMINANCE16),
+_const(LUMINANCE_ALPHA),
+_const(LUMINANCE4_ALPHA4),
+_const(LUMINANCE6_ALPHA2),
+_const(LUMINANCE8_ALPHA8),
+_const(LUMINANCE12_ALPHA4),
+_const(LUMINANCE12_ALPHA12),
+_const(LUMINANCE16_ALPHA16),
+_const(R3_G3_B2),
+_const(RGB),
+_const(RGB4),
+_const(RGB5),
+_const(RGB8),
+_const(RGB10),
+_const(RGB12),
+_const(RGB16),
+_const(RGBA),
+_const(RGBA2),
+_const(RGBA4),
+_const(RGB5_A1),
+_const(RGBA8),
+_const(RGB10_A2),
+_const(RGBA12), or
+_const(RGBA16).
+_phead(__sink)
+If _const(TRUE), pixels will be consumed by the minmax
+process and no drawing or texture loading will take place.
+If _const(FALSE), pixels will proceed to the final conversion process after
+minmax.
+.SH DESCRIPTION
+When _const(MINMAX) is enabled, the RGBA components of incoming pixels are
+compared to the minimum and maximum values for each component, which are
+stored in the 2-element minmax table.
+(The first element stores the minima, and the second element stores
+the maxima.)
+If a pixel component is greater than the corresponding component
+in the maximum element, then the maximum element is updated with the
+pixel component value.
+If a pixel component is less than the corresponding component in
+the minimum element, then the minimum element is updated with the
+pixel component value.
+(In both cases, if the internal format of the minmax table includes
+luminance, then the R color component of incoming pixels is used
+for comparison.)
+The contents of the minmax table may be retrieved at a later time
+by calling _cmnd(GetMinmax).
+The minmax operation is enabled or disabled by calling _cmnd(Enable) or
+_cmnd(Disable), respectively, with an argument of _const(MINMAX).
+.P
+_cmnd redefines the current minmax table to have entries of the format
+specified by __internalformat.
+The maximum element is initialized with the smallest possible component
+values, and the minimum element is initialized with the largest possible
+component values.
+The values in the previous minmax table, if any, are lost.
+If __sink is _const(TRUE), then pixels are discarded after minmax;
+no further processing of the pixels takes place, and no drawing,
+texture loading, or pixel readback will result.
+.P
+.SH NOTES
+_cmnd is present only if _arbstring(imaging) is returned when _cmnd(GetString)
+is called with an argument of _const(EXTENSIONS).
+.SH ERRORS
+_const(INVALID_ENUM) is generated if __target is not one of the allowable
+values.
+.P
+_const(INVALID_ENUM) is generated if __internalformat is not one of the
+allowable values.
+.P
+_const(INVALID_OPERATION) is generated if _cmnd is executed
+between the execution of _cmnd(Begin) and the corresponding
+execution of _cmnd(End).
+.SH ASSOCIATED GETS
+_cmnd(GetMinmaxParameter)
+.SH SEE ALSO
+_cmnd(GetMinmax),
+_cmnd(ResetMinmax)