def get_barcode_img(string, xdim)
    binary_barcode = Barby::Code128C.new(string)
    outputter = Barby::RmagickOutputter.new(binary_barcode)
    outputter.height, outputter.xdim = 96, xdim
    encoded_image = Base64.encode64(outputter.to_jpg.to_s).gsub(/s+/, "")
end

<% barcode = get_barcode_img("123456", 1.44)  %>
<%= image_tag("data:image/jpg;base64,#{Rack::Utils.escape(barcode)}") %>