'\"
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'\" All rights reserved.
'\"
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'\" license or royalty fees, to use, copy, modify, and distribute this
'\" documentation for any purpose, provided that the above copyright
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'\" $Header: /user6/ouster/wish/man/RCS/lower.n,v 1.2 93/07/07 16:27:47 ouster Exp $ SPRITE (Berkeley)
'/" 
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..
.HS glx_viewport tk 3.3
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
glx_viewport \- configure the GL viewport
.SH SYNOPSIS
\fBglx_viewport \fIwidth height\fR
.br
\fBglx_viewport \fIleft right bottom top\fR
.BE

.SH DESCRIPTION
.PP
\fBglx_viewport\fR calls the GL function \fIviewport()\fR.  If two arguments
are given, they are assumed to be the width and height of a viewport whose
origin is at (0, 0).  If four arguments are given, they represent the left,
right, bottom and top of the viewport.

Whenever a Configure event is received in a glxwin window, this
command should be called as \fB glx_viewport %w %h \fR to notify GL of
the new size of the window.  The change in viewport applies to the
current window only; if other windows or auxiliary windows (such as
overlays and popups) are in use, each should be selected in turn and 
\fBglx_viewport\fR should be called.

.SH KEYWORDS
viewport, GL, GLX
