Cartoon shader improvements

[Technologicat]

@Thaumaturge

Sorry that it’s taken me so long to respond–I started an entry for a one-week game development competition on Monday, and have been kept rather busy! However, thank you very much for the explanation of your antialiasing algorithm–it seems rather good.

One week for developing a game sounds awfully short

Yeah, it seems this algorithm does the job. Looking forward to getting it integrated into 1.9.0.

I have some stuff to take care of in CommonFilters first, so that we can also get ninth’s lens flare in (and some simple filters of my own: CommonFilters - some new filters, and the future).