[Mesa-dev] [PATCH 2/5] st/mesa: require all s3tc formats for EXT_texture_compression_s3tc

[Marek Olšák]

On Mon, Jan 23, 2012 at 2:40 PM, Brian Paul <brian.e.paul at gmail.com> wrote:
>
> Just curious: is this just for the sake of completeness or some other reason?
>
> Reviewed-by: Brian Paul <brianp at vmware.com>

For the sake of completeness, but there are at least two valid reasons as well:
- We don't provide fallback formats for S3TC.
- DXT1_RGBA has premultiplied alpha, so it cannot be replaced with any
other S3TC format.

Marek