XDrawPoint(XS)    X Version 11 (Release 5) 6 January 1993     XDrawPoint(XS)


 Name

    XDrawPoint - draw points and points structure

 Syntax


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

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


 Arguments


    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
              CoordModePrevious.

    npoints   Specifies the number of points in the array.

    points    Specifies an array of points.

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

 Description

    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 CoordModePrevious treats all coordinates
    after the first as relative to the previous point.  XDrawPoints 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'', ``Bad-
    Match'', and ``BadValue'' errors.

 Structures

    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.

 Diagnostics


    ``BadDrawable''
                   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.

 See also

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