mirror of
https://github.com/webmproject/libwebp.git
synced 2025-01-30 00:22:55 +01:00
e1947a9299
Add code for Alpha encoding & decoding. The alpha compression is done via backward reference counts encoded with Arithmetic encoder (TCoder). Also provided is lossy Alpha pre-processing option via level-quantizations using kNN heuristic. Change-Id: Ib6b13530c1a4ab6493edcb586ad29fe242bc1766