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CentOS 7.0 - man page for xpoint (centos section 3)

XDrawPoint(3)				  XLIB FUNCTIONS			    XDrawPoint(3)

       XDrawPoint, XDrawPoints, XPoint - draw points and points structure

       int XDrawPoint(Display *display, Drawable d, GC gc, int x, int y);

       int XDrawPoints(Display *display, Drawable d, GC gc, XPoint *points, int npoints, int

       d	 Specifies the drawable.

       display	 Specifies the connection to the X server.

       gc	 Specifies the GC.

       mode	 Specifies the coordinate mode.  You can pass CoordModeOrigin or CoordModePrevi-

       npoints	 Specifies the number of points in the array.

       points	 Specifies an array of points.

       y	 Specify the x and y coordinates where you want the point drawn.

       The XDrawPoint function uses the foreground pixel and function components of the GC to
       draw a single point into the specified drawable; XDrawPoints draws multiple points this
       way.  CoordModeOrigin treats all coordinates as relative to the origin, and CoordModePre-
       vious treats all coordinates after the first as relative to the previous point.	XDraw-
       Points draws the points in the order listed in the array.

       Both functions use these GC components: function, plane-mask, foreground, subwindow-mode,
       clip-x-origin, clip-y-origin, and clip-mask.

       XDrawPoint can generate BadDrawable, BadGC, and BadMatch errors.  XDrawPoints can generate
       BadDrawable, BadGC, BadMatch, and BadValue errors.

       The XPoint structure contains:

       typedef struct {
	       short x, y;
       } XPoint;

       All x and y members are signed integers.  The width and height members are 16-bit unsigned
       integers.  You should be careful not to generate coordinates and sizes out of the 16-bit
       ranges, because the protocol only has 16-bit fields for these values.

		 A value for a Drawable argument does not name a defined Window or Pixmap.

       BadGC	 A value for a GContext argument does not name a defined GContext.

       BadMatch  An InputOnly window is used as a Drawable.

       BadMatch  Some argument or pair of arguments has the correct type and range but fails to
		 match in some other way required by the request.

       BadValue  Some numeric value falls outside the range of values accepted by the request.
		 Unless a specific range is specified for an argument, the full range defined by
		 the argument's type is accepted.  Any argument defined as a set of alternatives
		 can generate this error.

       XDrawArc(3), XDrawLine(3), XDrawRectangle(3)
       Xlib - C Language X Interface

X Version 11				   libX11 1.6.0 			    XDrawPoint(3)

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