libharu：HPDFDoc::HPDF_PAGE_NUM_STYLE_LOWER_ROMAN

#!/usr/bin/env ruby

require "hpdf"

pdf  = HPDFDoc.new
pdf.add_page_label(0, HPDFDoc::HPDF_PAGE_NUM_STYLE_LOWER_ROMAN, 1, "")

page = pdf.add_page
page = pdf.add_page

pdf.save_to_file(File.basename($0, ".rb") + ".pdf")