[Mesa-dev] [PATCH 01/10] mesa: add infra for ARB_shader_texture_image_samples

[Ilia Mirkin]

On Tue, Sep 8, 2015 at 11:38 PM, Ian Romanick <idr at freedesktop.org> wrote:
> On 09/08/2015 08:17 PM, Ian Romanick wrote:
>> On 09/08/2015 08:10 PM, Ilia Mirkin wrote:
>>> I'll give it a shot on NVIDIA and see what happens... my tests might
>>> require GL 3.2 because I didn't want to deal with the various
>>> differences that happen otherwise.
>>
>> That should be good enough.  Perhaps someone else can try on AMD
>> closed-source drivers.  If they both ignore the spec, then I feel pretty
>> comfortable ignoring it too... while I work on getting it changed.
>
> I have attached the spec changes that I am proposing.

This drops the dependence on images, which means that gallium drivers
can get this straight away. From a "allow the extension to run on as
many devices as possible" standpoint, this makes sense. There's an
alternate viewpoint which is that this should perhaps require *both*
images and ARB_texture_multisample (without requiring any specific
GLSL version).

I've only looked at things from the driver writer's standpoint, i.e.
"make as many exts available as possible", so I'm definitely in favor
:) But I could also easily live with leaving the images requirement in
there.

  -ilia