PDF::Writer:#ellipse2_at
require 'pdf/writer' pdf = PDF::Writer.new pdf.ellipse2_at(250, pdf.y, 20, 10) pdf.stroke File.open("2008012900.pdf", "wb") { |f| f.write pdf.render }
と
require 'pdf/writer' pdf = PDF::Writer.new pdf.ellipse2_at(250, pdf.y, 20, 10, 135, -45) pdf.stroke File.open("2008012901.pdf", "wb") { |f| f.write pdf.render }