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

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

Gareth Hughes wrote:
> 
> Gareth Hughes wrote:
> >
> > > > The Driver.TexImage* callbacks are now no longer allowed to fail.
> > >
> > > Because it'll be up to core Mesa to unpack and store the texture image
> > > under all circumstances?
> > >
> > > I'm a bit worried about expecting core Mesa to do all this.  Consider
> > > a card that uses some sort of tiled texture memory layout.  I think it
> > > should be up to the driver to handle image conversion for something
> > > like this and not burdon core Mesa with strange conversion routines.
> 
> I should add the following:
> 
> Cards that do tiled textures will generally tile them for you on the
> texture upload blit.  This is perhaps the only really efficient way to
> do tiled textures, as tiling them manually would be a comparatively
> expensive operation.  This is true in all the cases I've seen, at least,
> and my experience may be unfairly biased.

My experience (i810) is the same.  The i810 handles all tiling transparently
to the driver, just imposes a few rules about surfaces not crossing boundaries
between tiled/untiled memory.h

Keith