[Mesa-dev] [PATCH 3/4] nine: handle D3DISSUE_END without previous D3DISSUE_BEGIN

[Ilia Mirkin]

On Sat, Nov 22, 2014 at 1:45 AM, John Ettedgui <john.ettedgui at gmail.com> wrote:
> On Fri Nov 21 2014 at 10:36:29 PM Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>>
>> Right, I figured as much. My point is that doing what I'm proposing
>> there would allow such usage even though it is illegal based on the
>> API description.
>>
> Alright.
>>
>> It requires a begin_query for some but not all queries.
>>
>> Perhaps the code should read like
>>
>>     } else {
>>         if (This->state != NINE_QUERY_STATE_RUNNING)
>>             pipe->begin_query(pipe, This->pq);
>>         pipe->end_query(pipe, This->pq);
>>         This->state = NINE_QUERY_STATE_ENDED;
>>     }
>>
>> This seems like it would also take care of the Ended -> Ended
>> transition which is supposed to restart the query.
>
> My understanding is that the End->End restart is only in the final state of
> the query, so it shouldn't happen in the others.
> Do you see that differently?

No, but it seems like my proposed code above handles all the
situations... if it's in the Building state (aka 'RUNNING'), then it
just executes end_query. If it's in any other state (i.e. FRESH,
ENDED, or FLUSHED) it will start a query anew and flip back to the
ENDED state (which roughly corresponds to Issued). I guess
FRESH/FLUSHED correspond to 'Signaled', although ENDED can mean
'Signaled' as well since nothing changes the state if
pipe->get_query_results succeeds.

BTW, please note that I know exceedingly little about the d3d9 api --
I'm just going by the msdn page you linked to + knowledge of gallium.
I could well have misunderstood something.

Cheers,

  -ilia