Re: Seed 514 in feTurbulence causes squares

It was the algorithm. At line 50 of the reference code there needs to be a check to make sure that both [k][i][0] and [k][i][1] are not zero.

fix for Batik
if (u == 0 && v == 0) u=v=1;

or the fix for my JS port of the spec code

                    if (fGradient[k][i][0] == 0 && fGradient[k][i][1] == 0)
                        {
                            fGradient[k][i][0] = 1;
                            fGradient[k][i][1] = 1;
                        }