XDrawPoint(3) XLIB FUNCTIONS XDrawPoint(3)
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
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,
BadMatch, 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(3),
XDrawLine(3),
XDrawRectangle(3) Xlib - C Language X InterfaceX Version 11 libX11 1.8.10 XDrawPoint(3)
