close
Adds a line segment to the path from the current point to the beginning of the current sub-path, (the most recent point passed to moveTo), and closes this sub-path. After this call the current point will be at the joined endpoint of the sub-path. The behavior of closePath is distinct from simply calling lineTo with the equivalent coordinate in the case of stroking. When a closed sub-path is stroked there are no caps on the ends of the sub-path. Instead there is a line join connecting the final, and initial segments of the sub-path.
If there is no current point before the call to closePath then this function will have no effect. Note: As of cairo version 1.2.4 any call to closePath will place an explicit MOVE_TO element into the path immediately after the CLOSE_PATH element, (which can be seen in cairo_copy_path for example). This can simplify path processing in some cases as it may not be necessary to save the last move_to point during processing as the MOVE_TO immediately after the CLOSE_PATH will provide that point.