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require 'rvg/rvg'
rvg = Magick::RVG.new(300, 300) do |canvas|
canvas.background_fill = 'white'
triangles = Magick::RVG::Pattern.new(16, 16).viewbox(0, 0, 50, 50) do |pat|
pat.rect(50, 50).styles(fill: 'darkblue')
pat.polygon(0, 0, 25, 50, 50, 0, 0, 0).styles(fill: 'yellow', stroke: 'red')
end
canvas.ellipse(130, 60, 150, 75).styles(stroke_width: 16, fill: 'none', stroke: triangles)
hat = Magick::Image.read('images/Flower_Hat.jpg').first
hats = Magick::RVG::Pattern.new(hat.columns / 4.0, hat.rows / 4.0) do |pat|
pat.image(hat, hat.columns / 4.0, hat.rows / 4.0)
end
canvas.g.translate(0, 150) do |grp|
grp.ellipse(130, 60, 150, 75).styles(fill: hats)
end
canvas.rect(299, 299, 0, 0).styles(fill: 'none', stroke: 'blue')
canvas.line(1, 150, 299, 150)
end
rvg.draw.write('rvg_pattern.gif')
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