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')