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Thanks to John Brooks at Blue Shift, Inc. for inspiring this work by showing me his Dreamcast texture compression system around 2002, and for releasing etc2comp. I first saw the subblock flip estimation approach (used in basisu_etc.cpp) in etc2comp.
-Thanks to Colt McAnlis, for advertising one of my earlier open source texture compression libraries at GDC.
+Thanks to Colt McAnlis, for advertising one of my earlier open source texture compression libraries at GDC, and Won Chun, who originally suggested making a universal system.
I first saw using precomputed tables for quickly computing optimal encodings of solid color blocks in ryg_dxt. The method that limits the canonical Huffman codelengths to a maximum codesize was used in Yoshizaki's lharc.
