[Mesa-dev] [PATCH] linker: Reject shaders that use too many varyings

[Jerome Glisse]

On Wed, Jun 22, 2011 at 10:49 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
> On Wed, Jun 22, 2011 at 10:12 PM, Roland Scheidegger <sroland at vmware.com> wrote:
>> Am 21.06.2011 20:59, schrieb Sven Arvidsson:
>>> This change broke a whole lot of stuff on r600g, for example Unigine
>>> Heaven:
>>>
>>>       shader uses too many varying components (36 > 32)
>>
>> It looks like the r600g driver claims to only support 10 varyings, which
>> the state tracker reduces to 8 (as it subtracts the supposedly included
>> color varyings).
>> At first sight I can't quite see why it's limited to 10, all r600 chips
>> should be able to handle 32 (dx10 requirement) but of course the driver
>> might not (mesa itself is limited to 16 it seems). If it worked just
>> fine before that suggests it indeed works just fine with more...
>> Someone more familiar with the driver should be able to tell if it's
>> safe to increase the limit to 32 (the state tracker will cap it to 16).
>
> The hardware definitely supports 32.  I'm not sure why it's currently
> set to 10; I don't see any limitations in the code off hand.
>
> Alex

IIRC it's just cut & paste from r300g it can be safely bump

Cheers,
Jerome