Specify the width and height, which are the major and minor axes of the arc. Each arc is specified by a rectangle and two angles. The center of the circle or ellipse is the center of the rectangle, and the major and minor axes are specified by the width and height.
Positive angles indicate counterclockwise motion, and negative angles indicate clockwise motion.
If the magnitude of angle2 is greater than 360 degrees, XDrawArc or XDrawArcs truncates it to 360 degrees. These coordinates can be fractional and so are not truncated to discrete coordinates. The path should be defined by the ideal mathematical path. For any given arc, XDrawArc and XDrawArcs do not draw a pixel more than once. If two arcs join correctly and if the line-width is greater than zero and the arcs intersect, XDrawArc and XDrawArcs do not draw a pixel more than once.