_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
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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_ 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(BlendColor, set the blend color)
_names(BlendColor)
.EQ
delim $$
.EN
.SH PARAMETERS
_phead(_param1 _param2 _param3 _param4)
specify the components of _const(BLEND_COLOR)
.SH DESCRIPTION
The _const(BLEND_COLOR) may be used to calculate the source and destination
blending factors. The color components are clamped to the range [0,\ 1]
before being stored. See _cmnd(BlendFunc) for a complete description of the
blending operations.
Initially the _const(BLEND_COLOR) is set to (0, 0, 0, 0).
.SH NOTES
_cmnd is part of the _arbstring(imaging) subset. _cmnd is present only
if _arbstring(imaging) is returned when _cmnd(GetString) is called with
_const(EXTENSIONS) as its argument.
.SH ERRORS
_const(INVALID_OPERATION) is generated if _cmnd is executed
between the execution of _cmnd(Begin) and the corresponding
execution of _cmnd(End).
.P
.SH ASSOCIATED GETS
_cmnd(Get) with an argument of _const(BLEND_COLOR)
.SH SEE ALSO
_cmnd(BlendEquation),
_cmnd(BlendFunc),
_cmnd(GetString)