MirOS Manual: XDrawPoint(3), XDrawPoints(3), XPoint(3)


XDrawPoint(3X11)         XLIB FUNCTIONS          XDrawPoint(3X11)

NAME

     XDrawPoint, XDrawPoints, XPoint - draw points and points
     structure

SYNTAX

     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 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 Coord-
               ModeOrigin 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 func-
     tion 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;

XFree86                   Version 4.5.0                         1

XDrawPoint(3X11)         XLIB FUNCTIONS          XDrawPoint(3X11)

     } 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 gen-
               erate this error.

SEE ALSO

     XDrawArc(3X11), XDrawLine(3X11), XDrawRectangle(3X11)
     Xlib - C Language X Interface

XFree86                   Version 4.5.0                         2

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