[Mesa3d-dev] [Bug 24207] Extension for S3TC decompression only

[<bug...@fr...>]

http://bugs.freedesktop.org/show_bug.cgi?id=24207





--- Comment #2 from Stephane Marchesin <mar...@ic...>  2009-09-30 12:37:06 PST ---
(In reply to comment #1)
> There already is such an extension.  See:
> 
> http://www.opengl.org/registry/specs/EXT/texture_compression_dxt1.txt
> 
> However, supporting this outright still does not resolve the potential legal
> problem.  Furthermore, we still have to be able to support potential software
> fallbacks.  We can't do that without a way to handle compressed textures in
> software.  Without a license for S3TC, we're not going to add any further
> support for S3TC textures.
> 

for fallbacks, it can work as follows: render the texture to a buffer on the
GPU (which decompresses it on the way) and then work from the buffer. That
doesn't infringe the S3TC license.


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