[Mesa-stable] [PATCH] egl: support EGL_LARGEST_PBUFFER in eglCreatePbufferSurface(...)

[Emil Velikov]

Hi guys,

On 15 February 2016 at 10:54, Tapani Pälli <tapani.palli at intel.com> wrote:
> From: Daniel Czarnowski <daniel.czarnowski at intel.com>
>
> Patch provides a 'sane default' for a set pbuffer surface size when
Perhaps too cheeky of a question but "who is to determine these 'sane
defaults'" ?

If those are OK for one hardware/generation they won't be for another.
I believe the whole problem boils down to the fact that we don't do
anything in case of EGL_LARGEST_PBUFFER. Looking at GLX -
GLX_LARGEST_PBUFFER seems to be in the same boat :-\

Imho one should honour it while creating the surface. Afaics the spec
isn't clear if height/width should be ignored when the bool is set (or
I missed that hunk), so I'm leaning towards "yes".

> EGL_LARGEST_PBUFFER is used by the client. MIN2 macro is moved to
> egldefines so that it can be shared.
>
> Fixes following Piglit test:
>    egl-create-largest-pbuffer-surface
>
With the above said, I'm not sure how much sense it makes to have
explicit EGL_HEIGHT/WIDTH in the test, alongside EGL_LARGEST_PBUFFER
in the mentioned test.

In all fairness, fixing this properly might result in a serious
(series of) patch(es). Which might be a bit too much for stable ?
Better to cross that road as we reach it :-)

-Emil