XDrawPoint(3X11) XLIB FUNCTIONS XDrawPoint(3X11)NAME
XDrawPoint, XDrawPoints, XPoint - 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 rela-
tive to the origin, and CoordModePrevious treats all coor-
dinates 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.
X Version 11 Release 6.4 1
XDrawPoint(3X11) XLIB FUNCTIONS XDrawPoint(3X11)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 cor-
rect 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 spe-
cific 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 ALSOXDrawArc(3X11), XDrawLine(3X11), XDrawRectangle(3X11)
Xlib - C Language X Interface
X Version 11 Release 6.4 2
