[Mesa-dev] [RFC PATCH] gallium: add interface for EQAA
Marek Olšák
maraeo at gmail.com
Mon May 7 17:47:02 UTC 2018
On Mon, May 7, 2018 at 8:17 AM, Nicolai Hähnle <nhaehnle at gmail.com> wrote:
> On 01.05.2018 22:48, Marek Olšák wrote:
>
>> +**nr_color_samples**: This is the number of color samples for
>> EQAA, while
>> +``nr_samples`` is the number of coverage samples. If the format
>> is Z/S,
>> +``nr_color_samples`` is ignored. Constraints:
>> +* ``nr_color_samples`` must not be greater than ``nr_samples``.
>> +* If ``nr_color_samples`` is equal to ``nr_samples``, it is
>> called MSAA.
>> +* If ``nr_color_samples`` is less than ``nr_samples``, it is
>> called EQAA.
>> +* If ``nr_color_samples`` is equal to 1, the behavior of the
>> resolve blit is
>> +driver-dependent.
>>
>>
>> Why the last buller?
>>
>>
>> Because we can support N >= 2 coverage samples and 1 color sample.
>>
>
> Okay, but for EQAA the behavior of the resolve blit is driver-dependent
> also when there are >= 2 color samples, because you can still have samples
> whose color fragment was discarded.
>
Yes.
Marek
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