require 'rvg/rvg'

Magick::RVG.dpi = 90

TEXT_STYLES = {:writing_mode=>'lr',
               :glyph_orientation_horizontal=>0,
               :fill=>'red4',
               :font_weight=>'bold',
               :font_size=>16}

TEXT_STYLES2 = {:writing_mode=>'lr',
                :glyph_orientation_horizontal=>180,
                :fill=>'green',
                :font_weight=>'bold',
                :font_size=>16}

rvg = Magick::RVG.new(3.in, 1.in).viewbox(0,0,300,100) do |canvas|
  canvas.background_fill = 'white'

  canvas.text(15, 40, ':glyph_orientation_horizontal=0').styles(TEXT_STYLES)
  canvas.text(15, 80, ':glyph_orientation_horizontal=180').styles(TEXT_STYLES2)

  canvas.rect(299, 99).styles(:fill=>'none',:stroke=>'blue')
end

rvg.draw.write('writing_mode02.gif')