[PATCH] Implement software DXT1 compression

[alberto at mattea.info]

Hi Stefan, thanks for your answer. I've checked the nvidia texture tools
but, sadly, I think it's impossible to use them in wine: while they have c
bindings, those bindings lack the essential function
nvttSetOutputOptionsOutputHandler(NvttOutputOptions * outputOptions,
nvttOutputHandler outputHandler, nvttImageHandler imageHandler) 
(commented out in the headers), so the output can only be written to a
file.
What about going the mesa way, where the drivers aren't linked with any
s3tc library, but load it at runtime if it is present?
Any idea is welcome.