void cpdf_circle (int pdf document, double x-koor, double y-koor, double radius, int mode)
The cpdf_circle() function draws a circle with center at point (x-koor, y-koor) and radius radius.
The last optional parameter determines the unit length. If is 0 or omitted the default unit as specified for the page is used. Otherwise the koodinates are measured in postscript points disregarding the current unit.
See also cpdf_arc().