XDrawPoint(3X11)XDrawPoint(3X11)NAME
XDrawPoint, XDrawPoints, XPoint - draw points and points structure
SYNOPSIS
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
Specifies the drawable. Specifies the connection to the X server.
Specifies the GC. Specifies the coordinate mode. You can pass Coord‐
ModeOrigin or CoordModePrevious. Specifies the number of points in the
array. Specifies an array of points. 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
A value for a Drawable argument does not name a defined Window or
Pixmap. A value for a GContext argument does not name a defined GCon‐
text. An InputOnly window is used as a Drawable. Some argument or
pair of arguments has the correct type and range but fails to match in
some other way required by the request. Some numeric value falls out‐
side the range of values accepted by the request. Unless a specific
range is specified for an argument, the full range defined by the argu‐
ment'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
XDrawPoint(3X11)
