Joannesalfa : when that blog post was out, in february, I was thinking about adding the effect to the image effect plugins. I started the integration, but it's not finished, since I'm forced to work on other things.
The idea is to use that kind of things on platforms were WebGL isn't available.
I'll release it as soon as possible.
I haven't noticed your idea, so it would be awesome if you did.
Also notice i wasn't talking about "plugin" and "behavior", it's just "effects" where you can use XOR, Destination In, Destination Out, etc.
I'm not sure if is possible, if not, then behavior