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require 'rvg/rvg'
rvg = Magick::RVG.new(200, 100) do |canvas|
canvas.background_fill = 'white'
canvas.g.styles(font_size: 16, font_weight: 'normal', font_style: 'normal') do |grp|
grp.text(30, 30, ":text_anchor=>'start'").styles(text_anchor: 'start')
grp.circle(1, 30, 30).styles(stroke: 'red')
grp.text(100, 50, ":text_anchor=>'middle'").styles(text_anchor: 'middle')
grp.circle(1, 100, 50).styles(stroke: 'red')
grp.text(170, 70, ":text_anchor=>'end'").styles(text_anchor: 'end')
grp.circle(1, 170, 70).styles(stroke: 'red')
end
canvas.rect(199, 99).styles(fill: 'none', stroke: 'blue')
end
rvg.draw.write('text_styles.gif')
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