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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,eqn)_C_
-_C_      eqn is automatically replaced with neqn for nroff
-_header(PolygonStipple,set the polygon stippling pattern)
-_names(PolygonStipple)
-.EQ
-delim $$
-.EN
-.SH PARAMETERS
-_phead(_param1)
-Specifies a pointer to a $32 ~times~ 32$ stipple pattern that will be unpacked
-from memory in the same way that _cmnd(DrawPixels) unpacks pixels.
-.SH DESCRIPTION
-Polygon stippling,
-like line stippling
-(see _cmnd(LineStipple)),
-masks out certain fragments produced by rasterization,
-creating a pattern.
-Stippling is independent of polygon antialiasing.
-.P
-_param1 is a pointer to a $32 ~times~ 32$ stipple pattern that is stored
-in memory just like the pixel data supplied to a _cmnd(DrawPixels)
-call with 
-.I
-height
-and
-.I width
-both equal to 32, a pixel format
-of _const(COLOR_INDEX), and data type 
-of _const(BITMAP).
-That is,
-the stipple pattern is represented as a $32 ~times~ 32$ array
-of 1-bit color indices packed in unsigned bytes.
-_cmnd(PixelStore) parameters like _const(UNPACK_SWAP_BYTES)
-and _const(UNPACK_LSB_FIRST) affect the assembling of the bits into a
-stipple pattern.
-Pixel transfer operations
-(shift, offset, pixel map)
-are not applied to the stipple image,
-however.
-.P
-To enable and disable polygon stippling, call
-_cmnd(Enable) and _cmnd(Disable)
-with argument _const(POLYGON_STIPPLE). Polygon stippling is initially
-disabled. If it's enabled,
-a rasterized polygon fragment with window coordinates $x sub w$ and $y sub w$
-is sent to the next stage of the GL if and only if the
-($x sub w~roman mod~32$)th bit in the ($y sub w~roman mod~32$)th row
-of the stipple pattern is 1 (one).
-When polygon stippling is disabled, it is as if the stipple pattern
-consists of all 1's.
-.SH ERRORS
-_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(GetPolygonStipple)
-.br
-_cmnd(IsEnabled) with argument _const(POLYGON_STIPPLE)
-.SH SEE ALSO
-_cmnd(DrawPixels),
-_cmnd(LineStipple),
-_cmnd(PixelStore),
-_cmnd(PixelTransfer)