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

[Roland Scheidegger]

Am 23.06.2011 16:09, schrieb 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

Ok Marek bumped it to 34. That seems to be lying too I don't think it
could handle 32 generic inputs and 2 colors. But there's no way to
really express that right now.

Roland