On Tue, 3 Dec 2002, Brian Paul wrote: > > There was previously a dependency on the screen color depth when > > choosing the texture format in the radeon driver. > > I think that may have been a carry-over from the r128 (or tdfx?) driver > which may not have allowed 32bpp textures when the screen was 16bpp (but > I could be wrong). I doubt it's a hardware limitation, at least for r128 -- I don't know about tdfx. Even mach64 can handle 32bpp textures with a 16bpp screen. More likely it was done to help performance and memory usage at 16bpp. The other side of this coin is that with a 32bpp screen, you can actually save memory if the application only needs 16bpp for a texture and specifies an appropriate sized format.
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