The cpdf_arc() function draws an arc with center at point (x-coor, y-coor) and radius radius, starting at angle start and ending at angle end. Returns TRUE on success or FALSE on failure.
The optional parameter mode determines the unit length. If it is 0 or omitted the default unit as specified for the page is used. Otherwise the coordinates are measured in postscript points disregarding the current unit.
See also cpdf_circle().