    # File lib/prawn/graphics.rb, line 64
        def curve_to(dest,options={})
           options[:bounds] or raise Prawn::Errors::InvalidGraphicsPath,
             "Bounding points for bezier curve must be specified "+
             "as :bounds => [[x1,y1],[x2,y2]]"

           curve_points = (options[:bounds] << dest).map { |e| map_to_absolute(e) }
           add_content("%.3f %.3f %.3f %.3f %.3f %.3f c" %
                         curve_points.flatten )
        end