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Linux and compressed textures

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I currently compress my textures on load time, but I would like to switch it so they are stored on my disk in the same format as the card will use. I was planning on using s3tc, but I''ve read a little bit about it only working in linux with the nvidia drivers. Is that true? If so, what other formats do work well for cross-platform projects?

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At one time it was true, but at least some of the closed ATI drivers support it too. The open drivers refuse to support S3TC because of algorithm patent issues (the DRI team says it''ll implement it in the drivers they maintain as soon as they know it''s safe to do so). (See Google for the many existing arguments proclaiming the evilness of software and algorithm patents.) If you''re aiming at maximum compatibility with hardware, you shouldn''t make any assumptions about any compressed format support (which means you should store the textures in some format from which you can get uncompressed data).

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