[] (PDF::Writer::TagDisc)

          # File lib/pdf/writer.rb, line 2677
    2677:       def [](pdf, info)
    2678:         @foreground ||= DEFAULT_FOREGROUND
    2679:         @background ||= DEFAULT_BACKGROUND
    2680:
    2681:         desc  = info[:descender].abs
    2682:         xpos  = info[:x] - (desc * 2.00)
    2683:         ypos  = info[:y] + (desc * 1.05)
    2684:
    2685:         ss = StrokeStyle.new(desc)
    2686:         ss.cap  = :butt
    2687:         ss.join = :miter
    2688:         pdf.stroke_style! ss
    2689:         pdf.stroke_color @foreground
    2690:         pdf.circle_at(xpos, ypos, 1).stroke
    2691:         pdf.stroke_color @background
    2692:         pdf.circle_at(xpos, ypos, 0.5).stroke
    2693:       end