[Mesa-dev] GL4.5 or bust...

[Dave Airlie]

On 17 May 2016 at 07:24, Ian Romanick <idr at freedesktop.org> wrote:
> On 05/15/2016 01:32 PM, Dave Airlie wrote:
>> So I said this on irc over the weekend and it seemed like we had some
>> consensus on holding off 12.0 until we could announce 4.5 on some
>> hardware. This assumes the FP64 stuff is going in at least.
>>
>> So I decided to roll out the proposal here, which is that we finish
>> GL4.5 features off for at least Skylake I think.
>>
>> So what is needed/missing: please add as you see fit.
>>
>> a) robustness - radeonsi has some bits of this. We need to get
>> KHR_robustness bits, that I think Kayden has patches started for, and
>> i965 needs to ensure it uses robust buffer stuff. I don't think this
>> one in unobtainable.
>>
>> b) cull_distance - I merged something, it broke, I'll fix it today, job done.
>>
>> c) enhanced_layouts - So tarceri has posted patches, we know that to
>> do it properly we probably need to rip up attribute packing and
>> rewrite it, however if Kayden thinks what tarceri has done is
>> functional enough for now, we could merge the final pieces and work on
>> perfection later.
>>
>> d) SIMD32 for i965 compute shaders - this is probably the most unknown
>> to me, curro says he's got some patches, that need to rebase onto FP64
>> when it lands, assuming he can do that, and reviewers can get on top
>> of things, and we possibly only enable SIMD32 in the corner cases
>> initially, it might be possible to get this landed.
>>
>> Have I missed anything? Should we go for it?
>
> One other thing... if we start advertising GL 4.4 or GL 4.5, I believe
> we are obligated to pass conformance.  I know you've been working on it,
> but I suspect there's still a non-trivial amount of work to be done.

I don't think we are, we should want to pass conformance, but nobody is
asking Khronos yet to state we are a conformant implementation their website,
and we aren't advertising OpenGL conformance either. If we wanted to
get official
GL conformance for 4.4 or 4.5 or one of the companies providing
drivers from mesa
wanted to then I expect we'd have to pass CTS.

Though from what I can see how you pass CTS is you provide a patch
ifdeffing out all the tests you don't pass and say you've passed.

Dave.