[Mesa-dev] Wrong colors in 3D apps on big-endian systems

[Christian Zigotzky]

Am 11.03.14 12:08, schrieb Richard Sandiford:
> Michel Dänzer <michel at daenzer.net> writes:
>> On Mon, 2014-03-10 at 10:11 +0100, Christian Zigotzky wrote:
>>> On 10.03.2014 02:49, Michel Dänzer wrote:
>>>> Congratulations, you just broke llvmpipe again on big endian systems. ;)
>>> I'm sorry but Mesa classic works very well on Debian Sid and Lubuntu
>>> 14.04 with these changes. ;) Why does Mesa classic work with the
>>> little-endian defines?
>> What do you mean by 'Mesa classic'? The r600g driver works with the
>> little endian defines because r600g assumes st/mesa uses the formats the
>> way it did before the llvmpipe big endian fixes.
>>
>>>> Did you even look at the commits introducing those defines? Did you
>>>> really think those defines, with explicit endianness checks, were
>>>> introduced for no reason but to break drivers on big endian systems?
>>>>
>>>>
>>>> I explained the problem in r600g and how it could be solved. Please
>>>> explore that.
>>> I'll try to explore that but I don't have any knowledge about the Mesa
>>> source code. The Fedora guys have solved the problem with the patch
>>> "mesa-9.2-llvmpipe-on-big-endian.patch". What do you think of this patch?
>> It sounds like an older downstream attempt at fixing llvmpipe on big
>> endian hosts, which was superseded by the upstream fixes, which were
>> incidentally pushed by the 'Fedora guy' Adam Jackson. Adding him and
>> Richard Sandiford (the author of the fixes) to CC, maybe they can help
>> you fix up r600g.
> I don't know the r600 code at all, sorry.  But like you say, if the code
> is treating the x8y8z8w8 formats as low-to-high integers (x in lsb, z in msb)
> then the right fix should be to use PIPE_FORMAT_xyzw8888_* instead of
> PIPE_FORMAT_x8y8z8w8_*.
>
> Thanks,
> Richard
>
>
Richard,

How can I change the formats x8y8z8w8 to xyzw8888?

Cheers,
Christian