[Mesa-dev] glxinfo updates?

[Eric Anholt]

Dave Airlie <airlied at gmail.com> writes:

> On Fri, Aug 31, 2012 at 1:32 AM, Ian Romanick <idr at freedesktop.org> wrote:
>> On 08/30/2012 02:33 PM, Brian Paul wrote:
>>>
>>> On 08/30/2012 08:08 AM, Ian Romanick wrote:
>>>>
>>>> It occurs to me that, even though the i965 driver can support OpenGL
>>>> 3.1 on some hardware, glxinfo will only (ever) say 3.0. We don't
>>>> support GL_ARB_compatibility,
>>>
>>>
>>> What features of GL_ARB_compatibility are you missing?  Do you plan on
>>> supporting GL_ARB_compatibility someday?
>>
>>
>> No.  There are several 3.1 features that interact poorly with some
>> compatibility features (especially TexBOs and some legacy texture formats).
>> We'd have to jump through hoops to make some of these features at all, and
>> I'd much rather have the time spent optimizing the features we do support,
>> finishing OpenGL ES 3.0, and working on OpenGL 3.2
>>
>
> I'm just wondering have you actually done a survey of apps that may or
> may not require ARB_compatibility?
>
> Since both major vendor drivers provide this, are you locking mesa out
> of some known use cases?

We haven't done any survey.  However, given that Apple doesn't expose
ARB_compat for their 3.2+ contexts, and given that they're a much bigger
market share than we are, it seemed like a reasonable way to save us a
ton of work to implement interactions on things that people shouldn't be
using.
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