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

[Alex Deucher]

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

>
> Roland
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