210 lines
5.0 KiB
Groff
210 lines
5.0 KiB
Groff
.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining
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.\" a copy of this software and associated documentation files (the
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.\" "Software"), to deal in the Software without restriction, including
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.\" without limitation the rights to use, copy, modify, merge, publish,
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.\" distribute, sublicense, and/or sell copies of the Software, and to
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.\" permit persons to whom the Software is furnished to do so, subject to
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.\" the following conditions:
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.\"
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.\" The above copyright notice and this permission notice shall be included
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.\" in all copies or substantial portions of the Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
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.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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.\" OTHER DEALINGS IN THE SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of the X Consortium shall
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.\" not be used in advertising or otherwise to promote the sale, use or
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.\" other dealings in this Software without prior written authorization
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.\" from the X Consortium.
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.\"
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
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.\" Digital Equipment Corporation
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.\"
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.\" Portions Copyright \(co 1990, 1991 by
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.\" Tektronix, Inc.
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.\"
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.\" Permission to use, copy, modify and distribute this documentation for
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.\" any purpose and without fee is hereby granted, provided that the above
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.\" copyright notice appears in all copies and that both that copyright notice
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.\" and this permission notice appear in all copies, and that the names of
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.\" Digital and Tektronix not be used in in advertising or publicity pertaining
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.\" to this documentation without specific, written prior permission.
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.\" Digital and Tektronix makes no representations about the suitability
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.\" of this documentation for any purpose.
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.\" It is provided ``as is'' without express or implied warranty.
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.\"
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.\"
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xW Athena X Widgets \- C Language X Toolkit Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.na
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.de Ds
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.nf
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.\\$1D \\$2 \\$1
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.ft 1
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.ny0
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.TH XEmptyRegion __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion \- determine if regions are empty or equal
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.SH SYNTAX
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.HP
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Bool XEmptyRegion\^(\^Region \fIr\fP\^);
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.HP
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Bool XEqualRegion\^(\^Region \fIr1\fP\^, Region \fIr2\fP\^);
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.HP
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Bool XPointInRegion\^(\^Region \fIr\fP\^, int \fIx\fP\^, int \fIy\fP\^);
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.HP
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int XRectInRegion\^(\^Region \fIr\fP\^, int \fIx\fP\^, int \fIy\fP\^, unsigned
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int \fIwidth\fP\^, unsigned int \fIheight\fP\^);
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.SH ARGUMENTS
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.IP \fIr\fP 1i
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Specifies the region.
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.IP \fIr1\fP 1i
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.br
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.ns
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.IP \fIr2\fP 1i
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Specify the two regions.
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.ds Wh , which define the rectangle
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.IP \fIwidth\fP 1i
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.br
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.ns
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.IP \fIheight\fP 1i
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Specify the width and height\*(Wh.
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.ds Xy , which define the point \
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or the coordinates of the upper-left corner of the rectangle
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.IP \fIx\fP 1i
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.br
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.ns
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.IP \fIy\fP 1i
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Specify the x and y coordinates\*(Xy.
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.SH DESCRIPTION
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The
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.ZN XEmptyRegion
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function returns
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.ZN True
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if the region is empty.
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.LP
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The
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.ZN XEqualRegion
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function returns
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.ZN True
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if the two regions have the same offset, size, and shape.
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.LP
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The
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.ZN XPointInRegion
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function returns
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.ZN True
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if the point (x, y) is contained in the region r.
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.LP
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The
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.ZN XRectInRegion
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function returns
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.ZN RectangleIn
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if the rectangle is entirely in the specified region,
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.ZN RectangleOut
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if the rectangle is entirely out of the specified region,
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and
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.ZN RectanglePart
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if the rectangle is partially in the specified region.
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.SH "SEE ALSO"
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XCreateRegion(__libmansuffix__),
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XIntersectRegion(__libmansuffix__)
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.br
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\fI\*(xL\fP
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