Re: [Mesa3d-dev] [rfc] to SpanRenderStart to avoid texture mapping overheads

[Keith W. <ke...@vm...>]

On Sat, 2010-03-06 at 00:30 -0800, Dave Airlie wrote:
> So in classic drivers we can hit swrast fallbacks for things like
> ReadPixels where we know we aren't going to have to want to touch
> textures at all. This would be useful for the r300 driver where Maciej
> is working on texture tiling will allow us to avoid the untiling
> overheads that mapping textures requires for most sw fallbacks.
> 
> There may be other operations where we can do this also. For render to
> texture scenarios the driver should still map the textures via the
> FBOs anyways.
> 
> Dave.

Looks like a reasonable idea to me. 

Keith