Begin a new sub-path. Note that the existing path is not affected. After this call there will be no current point. In many cases, this call is not needed since new sub-paths are frequently started with cairo_move_to(). A call to cairo_new_sub_path() is particularly useful when beginning a new sub-path with one of the cairo_arc() calls. This makes things easier as it is no longer necessary to manually compute the arc's initial coordinates for a call to cairo_move_to(). Since 1.2

class Context