[Mesa-dev] classic driver cleanup: ChooseTexFormat

Jerome Glisse j.glisse at gmail.com
Sat Sep 25 06:31:59 PDT 2010

On Fri, Sep 24, 2010 at 8:08 PM, Eric Anholt <eric at anholt.net> wrote:
> One of the uglier bits of the classic drivers, in my opinion, is the
> ChooseTexFormat hook.  Most drivers are trying to get to a similar set
> of formats, and using similar fallbacks for unavailable formats.
> Worse, they need to cleverly choose formats based on the incoming
> type/format to avoid having to munge the data on the way in if
> possible, and everyone needs to work those out.  So, rather than
> having each driver have these smarts, move it to the core.
> There are still some rough edges.  There are not enough fallbacks yet
> to cover everything (see i810 for example), so drivers with a more
> restricted set of supported formats may need to add more lines to
> _mesa_choose_tex_format.  Also, the endianness-dependent choice of
> formats in texmem.c and radeon's texturing isn't merged -- I knew I'd
> mess it up somehow if I did it on my own, so I'm leaving radeon for
> someone with big-endian to finish off.
> Any complaints, or should I go ahead and merge this?

Do we care about all those old GPU ? r128, sis .. ? To me it seems
like we pretend they work but my feeling is that no one use them.
I think only radeon, nouveau & intel classic driver are still in use.
For the others i wouldn't mind stop pretending supporting them and
removing them from the tree.


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