def annotate_pdf(pdf, opts={})
opts = options(opts)
xpos, ypos, height, xdim = opts[:x], opts[:y], opts[:height], opts[:xdim]
ydim = opts[:ydim] || xdim
orig_xpos = xpos
if barcode.two_dimensional?
boolean_groups.reverse_each do |groups|
groups.each do |bar,amount|
if bar
pdf.move_to(xpos, ypos)
pdf.line_to(xpos, ypos+ydim)
pdf.line_to(xpos+(xdim*amount), ypos+ydim)
pdf.line_to(xpos+(xdim*amount), ypos)
pdf.line_to(xpos, ypos)
pdf.fill
end
xpos += (xdim*amount)
end
xpos = orig_xpos
ypos += ydim
end
else
boolean_groups.each do |bar,amount|
if bar
pdf.move_to(xpos, ypos)
pdf.line_to(xpos, ypos+height)
pdf.line_to(xpos+(xdim*amount), ypos+height)
pdf.line_to(xpos+(xdim*amount), ypos)
pdf.line_to(xpos, ypos)
pdf.fill
end
xpos += (xdim*amount)
end
end
pdf
end