253 lines
6.3 KiB
Groff
253 lines
6.3 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 XDrawPoint __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XDrawPoint, XDrawPoints, XPoint \- draw points and points structure
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.SH SYNTAX
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.HP
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int XDrawPoint\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC
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\fIgc\fP\^, int \fIx\fP\^, int \fIy\fP\^);
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.HP
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int XDrawPoints\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC
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\fIgc\fP\^, XPoint *\fIpoints\fP\^, int \fInpoints\fP\^, int \fImode\fP\^);
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.SH ARGUMENTS
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.IP \fId\fP 1i
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Specifies the drawable.
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.IP \fIdisplay\fP 1i
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Specifies the connection to the X server.
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.IP \fIgc\fP 1i
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Specifies the GC.
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.IP \fImode\fP 1i
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Specifies the coordinate mode.
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You can pass
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.ZN CoordModeOrigin
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or
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.ZN CoordModePrevious .
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.IP \fInpoints\fP 1i
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Specifies the number of points in the array.
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.IP \fIpoints\fP 1i
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Specifies an array of points.
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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 where you want the point drawn.
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.SH DESCRIPTION
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The
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.ZN XDrawPoint
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function uses the foreground pixel and function components of the
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GC to draw a single point into the specified drawable;
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.ZN XDrawPoints
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draws multiple points this way.
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.ZN CoordModeOrigin
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treats all coordinates as relative to the origin,
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and
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.ZN CoordModePrevious
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treats all coordinates after the first as relative to the previous point.
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.ZN XDrawPoints
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draws the points in the order listed in the array.
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.LP
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Both functions use these GC components: function, plane-mask,
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foreground, subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask.
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.LP
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.ZN XDrawPoint
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can generate
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.ZN BadDrawable ,
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.ZN BadGC ,
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and
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.ZN BadMatch
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errors.
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.ZN XDrawPoints
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can generate
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.ZN BadDrawable ,
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.ZN BadGC ,
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.ZN BadMatch ,
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and
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.ZN BadValue
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errors.
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.SH STRUCTURES
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The
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.ZN XPoint
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structure contains:
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.LP
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.Ds 0
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.TA .5i
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.ta .5i
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typedef struct {
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short x, y;
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} XPoint;
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.De
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.LP
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All x and y members are signed integers.
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The width and height members are 16-bit unsigned integers.
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You should be careful not to generate coordinates and sizes
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out of the 16-bit ranges, because the protocol only has 16-bit fields
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for these values.
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.SH DIAGNOSTICS
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.TP 1i
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.ZN BadDrawable
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A value for a Drawable argument does not name a defined Window or Pixmap.
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.TP 1i
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.ZN BadGC
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A value for a GContext argument does not name a defined GContext.
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.TP 1i
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.ZN BadMatch
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An
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.ZN InputOnly
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window is used as a Drawable.
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.TP 1i
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.ZN BadMatch
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Some argument or pair of arguments has the correct type and range but fails
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to match in some other way required by the request.
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.TP 1i
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.ZN BadValue
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Some numeric value falls outside the range of values accepted by the request.
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Unless a specific range is specified for an argument, the full range defined
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by the argument's type is accepted. Any argument defined as a set of
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alternatives can generate this error.
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.SH "SEE ALSO"
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XDrawArc(__libmansuffix__),
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XDrawLine(__libmansuffix__),
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XDrawRectangle(__libmansuffix__)
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.br
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\fI\*(xL\fP
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