Krita, still very buggy

[Cyrille Berger]

> Which says:
>
> The source, which alpha is reduced with the inverse of the destination
> alpha, is merged with the destination, which alpha is reduced by the
> inverse of the source alpha. CompositionMode_Xor is not the same as the
> bitwise Xor.
>
> And I have always understood that bitwise xor is what we needed
oh right, on the other, the gimp marching ants doesn't use xor. I can't test 
on photoshop right now but I don't remember it to use xor either.
-- 
--- Cyrille Berger ---