On Fri, Sep 22, 2000 at 09:10:24AM -0700, Ian D Romanick wrote:
> Is this extension going to only be supported on 3dfx hardware or will there
> be a software fallback? It sure would be nice to make sure that one's code
> works right with the FXT1 textures without having to go out and buy a Voodoo
> 4/5/6. The same could also be done with S3TC format textures, I suppose.
I don't think there are plans for software fallbacks, but in reality you
are much better off using non-compressed textures than using software
fallbacks. What really happens is that other drivers that don't
implement the feature don't advertise and it and the application doesn't
I am not a lawyer, but from what I understand FXT1 can be implemented in
software, because 3dfx made it open source and even provided code to do
so. S3TC is very heavily protected and I wouldn't want to go near it for
a software implementation for fear of legal issues.
> If this is not work that is currently planned, could someone perhaps provide
> some guidance for others that might want to try and tackle this?
Guidance: FXT1 should be portable, but isn't useful unless the hardware
you're using supports FXT1. S3TC is supported on lots of hardware, but
due to legal restraints I wouldn't go near it.