.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
.na
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.TH XIntersectRegion 3X11 "Release 5" "X Version 11" "XLIB FUNCTIONS"
.SH NAME
XIntersectRegion, XUnionRegion, XUnionRectWithRegion, XSubtractRegion, XXorRegion, XOffsetRegion, XShrinkRegion \- region arithmetic
.SH SYNTAX
.\" $Header: XInterReg.f,v 1.2 88/04/07 17:02:01 mento Exp $
XIntersectRegion\^(\^\fIsra\fP\^, \fIsrb\fP\^, \fIdr_return\fP\^)
.br
      Region \fIsra\fP\^, \fIsrb\fP\^, \fIdr_return\fP\^;
.LP
.\" $Header: XUnionRegion.f,v 1.2 88/04/07 17:03:24 mento Exp $
XUnionRegion\^(\^\fIsra\fP\^, \fIsrb\fP\^, \fIdr_return\fP\^)
.br
      Region \fIsra\fP\^, \fIsrb\fP\^, \fIdr_return\fP\^;
.LP
XUnionRectWithRegion\^(\^\fIrectangle\fP, \fIsrc_region\fP, \
\fIdest_region_return\fP\^)
.br
     XRectangle *\fIrectangle\fP\^;
.br
     Region \fIsrc_region\fP\^;
.br
     Region \fIdest_region_return\fP\^;
.LP
.\" $Header: XSubtractReg.f,v 1.2 88/04/07 17:07:58 mento Exp $
XSubtractRegion\^(\^\fIsra\fP\^, \fIsrb\fP\^, \fIdr_return\fP\^)
.br
      Region \fIsra\fP\^, \fIsrb\fP\^, \fIdr_return\fP\^;
.LP
.\" $Header: XXorRegion.f,v 1.2 88/04/07 17:09:05 mento Exp $
XXorRegion\^(\^\fIsra\fP\^, \fIsrb\fP\^, \fIdr_return\fP\^)
.br
      Region \fIsra\fP\^, \fIsrb\fP\^, \fIdr_return\fP\^;
.LP
.\" $Header: XOffsetReg.f,v 1.1 88/02/26 10:01:40 mento Exp $
XOffsetRegion\^(\^\fIr\fP\^, \fIdx\fP\^, \fIdy\fP\^)
.br
      Region \fIr\fP\^;
.br
      int \fIdx\fP\^, \fIdy\fP\^;
.LP
.\" $Header: XShrinkReg.f,v 1.1 88/02/26 10:03:47 mento Exp $
XShrinkRegion\^(\^\fIr\fP\^, \fIdx\fP\^, \fIdy\fP\^)
.br
      Region \fIr\fP\^;
.br
      int \fIdx\fP\^, \fIdy\fP\^;
.SH ARGUMENTS
.IP \fIdest_region_return\fP 1i
Returns the destination region.
.\" $Header: dr.a,v 1.2 88/04/07 17:02:49 mento Exp $
.IP \fIdr_return\fP 1i
Returns the result of the computation.
ds Dy move or shrink
.\" $Header: dxdy.a,v 1.3 88/08/04 11:11:24 mento Exp $
.IP \fIdx\fP 1i
.br
.ns
.IP \fIdy\fP 1i
Specify the x and y coordinates,
which define the amount you want to \*(Dy the specified region.
.\" $Header: r.a,v 1.1 88/02/26 10:29:50 mento Exp $
.IP \fIr\fP 1i
Specifies the region.
.IP \fIrectangle\fP 1i
Specifies the rectangle.
.\" $Header: srasrb.a,v 1.1 88/02/26 10:31:19 mento Exp $
.IP \fIsra\fP 1i
.br
.ns
.IP \fIsrb\fP 1i
Specify the two regions with which you want to perform the computation.
.IP \fIsrc_region\fP 1i
Specifies the source region to be used.
.SH DESCRIPTION
.\" $Header: XInterReg.d,v 1.1 88/02/26 10:48:58 mento Exp $
The
.ZN XIntersectRegion
function computes the intersection of two regions.
.LP
.\" $Header: XUnionRegion.d,v 1.1 88/02/26 10:51:31 mento Exp $
The
.ZN XUnionRegion
function computes the union of two regions.
.LP
The
.ZN XUnionRectWithRegion
function updates the destination region from a union of the specified rectangle
and the specified source region.
.LP
.\" $Header: XSubtractReg.d,v 1.3 88/08/20 10:20:59 mento Exp $
The
.ZN XSubtractRegion
function subtracts srb from sra and stores the results in dr_return.
.LP
.\" $Header: XXorRegion.d,v 1.1 88/02/26 10:51:39 mento Exp $
The
.ZN XXorRegion
function calculates the difference between the union and intersection
of two regions.
.LP
.\" $Header: XOffsetReg.d,v 1.1 88/02/26 10:49:23 mento Exp $
The
.ZN XOffsetRegion
function moves the specified region by a specified amount.
.LP
.\" $Header: XShrinkReg.d,v 1.2 88/06/11 07:53:39 mento Exp $
The
.ZN XShrinkRegion
function reduces the specified region by a specified amount.
Positive values shrink the size of the region,
and negative values expand the region.
.SH "SEE ALSO"
XCreateRegion(3X11),
XDrawRectangle(3X11),
XEmptyRegion(3X11)
.br
\fI\*(xL\fP