def max_y_error()

in genweights.py [0:0]

• 14 lines of code
• 4 McCabe index (conditional complexity)

def max_y_error(xr, xg, xb, ar, ag, ab, y_min):
    err = 0.0
    shift = (y_min << FIX16) + (1 << (FIX16 - 1))

    for red in range(256):
        y_tmp = xr * red + shift
        yf_tmp = ar * red + y_min

        for green in range(256):
            y_tmp2 = xg * green + y_tmp
            yf_tmp2 = ag * green + yf_tmp

            for blue in range(256):
                y = (xb * blue + y_tmp2) >> FIX16
                yf = ab * blue + yf_tmp2
                err = max(err, abs(yf - y))

    return err