# File lib/prawn/graphics/transformation.rb, line 144
      def transformation_matrix(a, b, c, d, e, f)
        values = [a, b, c, d, e, f].map { |x| "%.5f" % x }.join(" ")
        save_graphics_state if block_given?
        add_content "#{values} cm"
        if block_given?
          yield
          restore_graphics_state
        end
      end