from scipy import pi
from enthought.kiva.backend_image import GraphicsContext

def draw_ellipse(gc, x, y, major, minor, angle):
    """ Draws an ellipse given major and minor axis lengths.  **angle** is
    the angle between the major axis and the X axis, in radians.
    """
    gc.save_state()
    gc.translate_ctm(x, y)
    ratio = float(major) / minor
    gc.rotate_ctm(angle)
    gc.scale_ctm(ratio, 1.0)
    gc.arc(0, 0, minor, 0.0, 2 * pi)
    gc.stroke_path()
    gc.move_to(-minor, 0)
    gc.line_to(minor, 0)
    gc.move_to(0, -minor)
    gc.line_to(0, minor)
    gc.stroke_path()
    gc.restore_state()

gc = GraphicsContext((300,300))

gc.save_state()
gc.set_alpha(0.3)
gc.set_stroke_color((1.0,0.0,0.0))
gc.set_fill_color((0.0,1.0,0.0))
gc.rect(95, 95, 10, 10)
gc.fill_path()
draw_ellipse(gc, 100, 100, 35.0, 25.0, pi / 6)
gc.save("ellipse.bmp")