void cpdf_rlineto (int pdf document, double x-koor, double y-koor, int mode)
The cpdf_rlineto() function draws a line from the current point to the relative point with coordinates (x-koor, y-koor).
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_moveto(), cpdf_rmoveto(), cpdf_curveto().