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require 'rmagick'
imgl = Magick::ImageList.new
imgl.new_image(300, 200, Magick::HatchFill.new('white', 'LightCyan2'))
gc = Magick::Draw.new
gc.fill_opacity(0)
gc.stroke('red')
gc.stroke_width(3)
# Draw rounded rectangle
gc.roundrectangle(20, 20, 280, 180, 8, 8)
gc.stroke('gray50')
gc.stroke_width(1)
gc.circle(20, 20, 23, 23)
gc.circle(280, 180, 283, 183)
# Annotate
gc.font_weight(Magick::NormalWeight)
gc.font_style(Magick::NormalStyle)
gc.fill('black')
gc.fill_opacity(1)
gc.stroke('transparent')
gc.text(30, 35, "'20,20'")
gc.text(230, 175, "'280,180'")
gc.draw(imgl)
imgl.border!(1, 1, 'lightcyan2')
imgl.write('roundrect.gif')
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