Hi Chris,
On Tue, 2014-06-24 at 22:12 +1200, Chris Forbes wrote:
> Continuing from this, I think you need a test to ensure that the
> points emitted in nonzero streams are not accidentally rendered when
> SO isn't active.
>
> According to that same section of the Haswell PRM, if SO Function
> Ena
On Tuesday, June 24, 2014 09:53:02 PM Chris Forbes wrote:
> It looks like you can have the SOL stage increment that counter even
> when not doing any actual streamout, which should give you the correct
> semantics.
>
> See the definition of 3DSTATE_STREAMOUT in the Haswell PRM, Volume 2b. You
wan
Continuing from this, I think you need a test to ensure that the
points emitted in nonzero streams are not accidentally rendered when
SO isn't active.
According to that same section of the Haswell PRM, if SO Function
Enable is 0, it appears the StreamID bits are ignored entirely, rather
than filte
It looks like you can have the SOL stage increment that counter even
when not doing any actual streamout, which should give you the correct
semantics.
See the definition of 3DSTATE_STREAMOUT in the Haswell PRM, Volume 2b. You want:
- dw1.31 SO Function Enable = 1
- dw1.25 SO Statistics Enable = 1
So far we have been using CL_INVOCATION_COUNT to resolve this query but this
is no good with streams, as only stream 0 reaches the clipping stage.
>From ARB_transform_feedback3:
"When a generated primitive query for a vertex stream is active, the
primitives-generated count is incremented every t
