# File lib/rqrcode-rails3.rb, line 14
  def render_qrcode(string, format, options)
    size   = options[:size]  || RQRCode.minimum_qr_size_from_string(string)
    level  = options[:level] || :h

    qrcode = RQRCode::QRCode.new(string, :size => size, :level => level)
    svg    = RQRCode::Renderers::SVG::render(qrcode, options)

    if format && format == :svg
      svg
    else
      image = MiniMagick::Image.read(svg) { |i| i.format "svg" }
      image.format format
      image.to_blob
    end
  end