.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
.\"
.\" Permission is hereby granted, free of charge, to any person obtaining
.\" a copy of this software and associated documentation files (the
.\" "Software"), to deal in the Software without restriction, including
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.\" distribute, sublicense, and/or sell copies of the Software, and to
.\" permit persons to whom the Software is furnished to do so, subject to
.\" the following conditions:
.\"
.\" The above copyright notice and this permission notice shall be included
.\" in all copies or substantial portions of the Software.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
.\" OTHER DEALINGS IN THE SOFTWARE.
.\"
.\" Except as contained in this notice, the name of the X Consortium shall
.\" not be used in advertising or otherwise to promote the sale, use or
.\" other dealings in this Software without prior written authorization
.\" from the X Consortium.
.\"
.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
.\" Digital Equipment Corporation
.\"
.\" Portions Copyright \(co 1990, 1991 by
.\" Tektronix, Inc.
.\"
.\" Permission to use, copy, modify and distribute this documentation for
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.\" of this documentation for any purpose.
.\" It is provided ``as is'' without express or implied warranty.
.\"
.\" $XFree86: xc/doc/man/X11/XERegion.man,v 1.3 2001/02/09 03:47:45 tsi Exp $
.\"
.ds xT X Toolkit Intrinsics \- C Language Interface
.ds xW Athena X Widgets \- C Language X Toolkit Interface
.ds xL Xlib \- C Language X Interface
.ds xC Inter-Client Communication Conventions Manual
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.TH XEmptyRegion __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
.SH NAME
XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion \- determine if regions are empty or equal
.SH SYNTAX
.HP
Bool XEmptyRegion\^(\^Region \fIr\fP\^);
.HP
Bool XEqualRegion\^(\^Region \fIr1\fP\^, Region \fIr2\fP\^);
.HP
Bool XPointInRegion\^(\^Region \fIr\fP\^, int \fIx\fP\^, int \fIy\fP\^);
.HP
int XRectInRegion\^(\^Region \fIr\fP\^, int \fIx\fP\^, int \fIy\fP\^, unsigned
int \fIwidth\fP\^, unsigned int \fIheight\fP\^);
.SH ARGUMENTS
.IP \fIr\fP 1i
Specifies the region.
.IP \fIr1\fP 1i
.br
.ns
.IP \fIr2\fP 1i
Specify the two regions.
.ds Wh , which define the rectangle
.IP \fIwidth\fP 1i
.br
.ns
.IP \fIheight\fP 1i
Specify the width and height\*(Wh.
.ds Xy , which define the point \
or the coordinates of the upper-left corner of the rectangle
.IP \fIx\fP 1i
.br
.ns
.IP \fIy\fP 1i
Specify the x and y coordinates\*(Xy.
.SH DESCRIPTION
The
.ZN XEmptyRegion
function returns
.ZN True
if the region is empty.
.LP
The
.ZN XEqualRegion
function returns
.ZN True
if the two regions have the same offset, size, and shape.
.LP
The
.ZN XPointInRegion
function returns
.ZN True
if the point (x, y) is contained in the region r.
.LP
The
.ZN XRectInRegion
function returns
.ZN RectangleIn
if the rectangle is entirely in the specified region,
.ZN RectangleOut
if the rectangle is entirely out of the specified region,
and
.ZN RectanglePart
if the rectangle is partially in the specified region.
.SH "SEE ALSO"
XCreateRegion(3X11),
XIntersectRegion(3X11)
.br
\fI\*(xL\fP