[Mesa-dev] [PATCH] egl: Add OpenGL_ES to API string regardless of GLES version

[Daniel Stone]

Hi,

On 18 May 2016 at 00:00, Ian Romanick <idr at freedesktop.org> wrote:
> On 05/17/2016 09:59 AM, Ben Widawsky wrote:
>> I think you misstated this. It's not invalid to have any other value. It's
>> invalid to not have one of the 3 values, which I suppose is technically possible
>> if you say support ES2, but not ES or GL (for example)
>>
>>  "Returns a string describing which client rendering APIs are supported. The
>>   string contains a space-separate list of API names. The list must include at
>>   least one of OpenGL, OpenGL_ES, or OpenVG. These strings correspond
>>   respectively to values EGL_OPENGL_API, EGL_OPENGL_ES_API, and EGL_OPENVG_API
>>   of the eglBindAPI, api argument."
>>
>> I am concerned by this change since I genuinely have no clue how EGL clients
>> might currently be depending on this, and as such could I request that you not
>> change the existing behavior (spit out when ES2 or ES3). At the bottom I put an
>> untested version of what i would have done.
>
> I think this might be right.  Outside of Mesa sources, I can't find any
> mention of OpenGL_ES2 or OpenGL_ES3 strings anywhere on the Internet.
> At least VLC
> (http://www.videolan.org/developers/vlc/modules/video_output/egl.c) uses
> OpenGL_ES for both OpenGL ES 1.x and 2.x.

Yes, and they'd be foolish not to: the proprietary Mali, PVR and
Vivante drivers don't expose these strings, just OpenGL_ES, OpenGL and
OpenVG. No idea what the proprietary Tegra drivers do, but I'd be
surprised if they were different.

Cheers,
Daniel