# File lib/gruff/base.rb, line 857
    def draw_label(x_offset, index)
      return if @hide_line_markers

      if !@labels[index].nil? && @labels_seen[index].nil?
        y_offset = @graph_bottom + LABEL_MARGIN

        @d.fill = @font_color
        @d.font = @font if @font
        @d.stroke('transparent')
        @d.font_weight = NormalWeight
        @d.pointsize = scale_fontsize(@marker_font_size)
        @d.gravity = NorthGravity
        @d = @d.annotate_scaled(@base_image,
                                1.0, 1.0,
                                x_offset, y_offset,
                                @labels[index], @scale)
        @labels_seen[index] = 1
        debug { @d.line 0.0, y_offset, @raw_columns, y_offset }
      end
    end