[Dri-devel] Mach64 / Rage128 texture compression update

[Ian Romanick]

While I was searching around the net for papers on texture memory management, I came across some references to Talisman and DirectX 6.0 texture compression. It seems that the compression algorithm used is called "TREC," which is short for "Texture and Rendering Compression."

http://www.ubicom.tudelft.nl/docs/UbiCom-TechnicalReport_1998_6.PDF
http://research.microsoft.com/MSRSIGGRAPH/96/Talisman.htm

Apparently, it is some sort of DCT based compression scheme. That would explain why ATI is the only company to ever implement it in hardware. :)



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