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snippet_normalize (cr, width, height)
image = cairo.ImageSurface.create_from_png ("data/romedalen.png")
w = image.get_width()
h = image.get_height()
cr.translate (0.5, 0.5)
cr.rotate (45* M_PI/180)
cr.scale (1.0/w, 1.0/h)
cr.translate (-0.5*w, -0.5*h)
cr.set_source_surface (image, 0, 0)
cr.paint ()