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 compo-
nents 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. XDraw-
Points draws the points in the order listed in the array.
Both functions use these GC components: function, plane-mask, fore-
ground, 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 Win-
dow or Pixmap.
BadGC A value for a GContext argument does not name a defined GCon-
text.
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 Interface
X Version 11 libX11 1.6.9 XDrawPoint(3)
xorg-libX11 1.6.9 - Generated Tue Oct 22 07:12:33 CDT 2019