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# File 'lib/command_wrap/image.rb', line 12
def self.scale (source, target, width, height = nil)
height = width unless height
simg = Magick::Image.read(source)[0]
if simg.columns > width && simg.rows > height
simg.resize_to_fit!(width, height)
end
timg = Magick::Image.new(width, height)
d = Magick::Draw.new
d.fill('white')
d.draw(timg)
timg = timg.transparent('white')
timg.composite!(simg, Magick::CenterGravity, Magick::OverCompositeOp)
timg.write(target)
end
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