public static class PdfCanvasConstants.LineJoinStyle
The line join style specifies the shape to be used at the corners of
paths that are stroked. Join styles are significant only at points where
consecutive segments of a path connect at an angle; segments that meet or
intersect fortuitously receive no special treatment.
All documentation for this class is taken from ISO 32000-1, section
184.108.40.206 "Line Join Style".
An arc of a circle with a diameter equal to the line width is drawn
around the point where the two segments meet, connecting the outer
edges of the strokes for the two segments. This pieslice-shaped
figure is filled in, producing a rounded corner.