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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(PixelZoom,specify the pixel zoom factors)
-_names(PixelZoom)
-.EQ
-delim $$
-.EN
-.SH PARAMETERS
-_phead(_param1 _param2)
-Specify the $x$ and $y$ zoom factors for pixel write operations.
-.SH DESCRIPTION
-_cmnd specifies values for the $x$ and $y$ zoom factors.
-During the execution of _cmnd(DrawPixels) or _cmnd(CopyPixels),
-if ($xr $, $yr $) is the current raster position,
-and a given element is in the $m$th row and $n$th column of the pixel rectangle,
-then pixels whose centers are in the rectangle with corners at
-.sp
-.ce
-($xr ~+~ n cdot _eqnparam1$, $yr ~+~ m cdot _eqnparam2$)
-.sp
-.ce
-($xr ~+~ (n+1) cdot _eqnparam1$, $yr ~+~ (m+1) cdot _eqnparam2$)
-.sp
-are candidates for replacement.
-Any pixel whose center lies on the bottom or left edge of this rectangular
-region is also modified.
-.P
-Pixel zoom factors are not limited to positive values.
-Negative zoom factors reflect the resulting image about the current
-raster position.
-.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(Get) with argument _const(ZOOM_X)
-.br
-_cmnd(Get) with argument _const(ZOOM_Y)
-.SH SEE ALSO
-_cmnd(CopyPixels),
-_cmnd(DrawPixels)