The shape at the ends of open subpaths and dashes when they are stroked.
public enum LineCap
ISO 32000-2 §8.4.3.3, Table 53.
kind:method, kind:property, kind:ctor. Press Esc to clear.ButtButt cap (0): the stroke is squared off at the endpoint.ProjectingSquareProjecting square cap (2): the stroke continues half the line width beyond the endpoint.RoundRound cap (1): a semicircular arc with a diameter equal to the line width.