An up-to-date description of FXAA?


I’m implementing FXAA, and in typical style for an algorithm that everyone and his dog has implemented, the available information on the algorithm seems to be pitiful.

There’s the original whitepaper:

There’s a presentation on the 3.11 version of the algorithm (presumably the most recent), that’s so vague as to be pretty useless:

The author maintains a blog, and apparently decided it was in the best interests of the internet to delete all of his posts on the algorithm years back.

There are multiple implementations:

… both of which only seem to have a passing resemblance to the algorithm described in the original whitepaper.

Does anyone have a detailed and up-to-date description of the current algorithm? I’m interested in doing a clean room implementation, not copying and pasting stuff I found online. An 800 line header file full of '#ifdefs doesn’t qualify!