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HappySqurriel on 20 February 2010
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MikeB said:
WilliamWatts said:
MikeB said:
WilliamWatts said:
No, lossless. Lossy compression of textures has a much higher ratio.

Sounds strange, why not do this compression in DX9 as well if it's lossless?

Because its not in spec. Textures are just xxx by xxx bitmaps. Very easy to compress those.

Not in the spec? Still sounds strange. Compression alogritms are actually pretty complex and my PC sports a DX9 capable graphics card, but also sports a faster CPU for decoding than the Xenon is capable of. I see no reason why I would need a better GPU for my CPU to perform more efficient decoding.

While it is not (necessarily) a popular feature, there have been GPUs that handled realtime texture decompression in order to ensure that memory is used efficiently.