On Mon, 14 Feb 2005 16:13:18 +0100, Jerome Glisse <[EMAIL PROTECTED]> wrote:
> On Mon, 14 Feb 2005 10:02:07 -0500 (EST), Vladimir Dergachev
> <[EMAIL PROTECTED]> wrote:
> >
> >
> > On Mon, 14 Feb 2005, Jerome Glisse wrote:
> >
> > >> On Mon, 14 Feb 2005 17:17:05 +1100, Paul Mackerras <[EMAIL PROTECTED]>
> > >> wrote:
> > >>> Vladimir Dergachev writes:
> > >>>
> > >>>> I am a bit puzzled with your patch - do you really need to hard code
> > >>>> format field in r300_state.c ?
> > >
> > > Ok i think i understand, Mesa tell us that the format is
> > > MESA_FORMAT_RGBA8888_REV on big endiand and
> > > MESA_FORMAT_RGBA8888 on little endian. Thus if i change
> > > {0xffffff01, 0},
> > > to
> > > {R300_EASY_TX_FORMAT(Z, Y, X, W, W8Z8Y8X8), 0},
> > >
> > > it works. Vlad does this lead to some strange things on x86 ?
> >
> > The reason these entries are as they are is because I (and probably no one
> > else yet) was not able to trigger them with any test program.
> >
> > Of course, it must be possible to debug them by writing a custom program,
> > but I did not have time for that yet..
>
> Yes but my understanding is that mesa will never give you
> MESA_FORMAT_RGBA8888_REV on x86 because this tell you
> that data are in reverse order (see mesa texformat). So i think
> that all odd entry in this table are for REV order (which we will
> found on big endian) and all even entry are for "normal" order
> x86. I think that you can ask mesa to give you texture in REV
> order on x86 but don't know how.
>
> I am really want to commit this simple patch, maybe someone
> with a better understand of mesa & who know radeon driver
> could tell us if i am wrong. More over if you look at all table
> (r200 table or table0 in r300) you will see that allmost all
> odd entry have the _REV suffix.
>
> So every even entry for you x86 and odd for us ppc ;)
>
> By the way with which program do you test :
> {0xffffff11, 0},
> ->{R300_EASY_TX_FORMAT(Y, Y, Y, X, Y8X8), 0},
> {0xffffff13, 0},
>
> the 0xffffff13 would be
> {0xffffff11, 0},
> {R300_EASY_TX_FORMAT(Y, Y, Y, X, Y8X8), 0},
> {R300_EASY_TX_FORMAT(Y, Y, X, Y, Y8X8), 0},
>
> But testing if the result is good is better :)
I commited a patch for big endian, i will do a test prog
so we can test texture format on x86 & ppc.
Jerome Glisse
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