Re: [Mesa3d-dev] Proposed new DD texture interface

[Gareth H. <ga...@va...>]

Brian Paul wrote:
> 
> How do power-of-two dimensions make for better optimization?
> 
> It's the case when then the source image row stride equals the dest
> image row stride and the stride equals the row length (all in bytes)
> that you can simplify the conversion down to a single loop.
> 
> As far as I see it, the only real difference between full image
> conversion and sub-image conversion is that dest image stride
> may not match the row length.  We handle that now as-is.

Sigh.  I need some sleep...

I've changed the parameters of the texsubimage call to take x, y, width,
height and pitch (like the Utah-style conversion functions).  Simple
test of width == pitch is all we need, as you say.  I'll add this to the
tdfx-3-1-0 branch Mesa code today.

-- Gareth