draw (Gruff::Area)

    # File lib/gruff/area.rb, line 6
      def draw
        super

        return unless @has_data

        @x_increment = @graph_width / (@column_count - 1).to_f
        @d = @d.stroke 'transparent'

        @norm_data.each do |data_row|
          poly_points = Array.new
          prev_x = prev_y = 0.0
          @d = @d.fill data_row[DATA_COLOR_INDEX]

          data_row[DATA_VALUES_INDEX].each_with_index do |data_point, index|
            # Use incremented x and scaled y
            new_x = @graph_left + (@x_increment * index)
            new_y = @graph_top + (@graph_height - data_point * @graph_height)

            if prev_x > 0 and prev_y > 0 then
              poly_points << new_x
              poly_points << new_y

              #@d = @d.polyline(prev_x, prev_y, new_x, new_y)
            else
              poly_points << @graph_left
              poly_points << @graph_bottom - 1
              poly_points << new_x
              poly_points << new_y

              #@d = @d.polyline(@graph_left, @graph_bottom, new_x, new_y)
            end

            draw_label(new_x, index)

            prev_x = new_x
            prev_y = new_y
          end

          # Add closing points, draw polygon
          poly_points << @graph_right
          poly_points << @graph_bottom - 1
          poly_points << @graph_left
          poly_points << @graph_bottom - 1

          @d = @d.polyline(*poly_points)

        end

        @d.draw(@base_image)
      end