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.
The optional parameter
mode determines the unit length. If it's 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().