[Mesa-dev] Quick EGL questions

[Thomas Hellstrom]

On 02/09/2012 03:18 PM, Benjamin Franzke wrote:
> 2012/2/9 Thomas Hellstrom<thellstrom at vmware.com>:
>> Hi!
>>
>> I have a couple of quick EGL questions that I hope someone knows the answer
>> to:
>>
>> 1) I'm trying to test the vmwgfx_dri driver with EGL driver egl_dri2,
>> platform drm, but it doesn't seem like this
>> configuration supports EGL_MESA_screen_surface so basically all relevant EGL
>> demos fail. Is this the case, or
>> is it more likely that we are missing something in the vmwgfx driver?
> Yes, egl_dri2 intentionally doesnt support EGL_MESA_screen_surface.
> The plan was to deprecate (and later remove) that one,
> and it replace with an egl surface type for gbm.
>
> There are already patches for this on the wayland devel list:
> http://lists.freedesktop.org/archives/wayland-devel/2012-January/001856.html
>
> In the meantime you may want to get src/egl/opengl/eglkms.c working.
>
>> 2) Why is --enable-shared-glapi needed with the drm EGL platform?
> The gbm dri backend and egl_dri2 code both use a dri_screen, and share that.
> When gbm_dri loads a dri driver, those require some _glapi_* symbols.
> In a non-shared-glapi configuration they are either in libGL, libGLESv2, etc
> But we cant link gbm against any of those, since the application
> should choose which one to link to, thats why we need to link against
> the shared glapi.

OK, thanks for the info.

/Thomas





>
>> Thanks,
>>
>> Thomas
>>
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