Re: Question about eglCreatePbufferSurface with empty attrib_list

AFAIK this was the pre-framebuffer-object / OES_surfaceless_context way of
making a context current without (really) having a bound surface. That said
I don't think Mesa actually implements that feature correctly, atm I think
you'll get a BadValue from the xcb_create_pixmap call, but patches to fix
that would be welcome.

- ajax

On Mon, Jul 18, 2022 at 10:28 PM Lin, Shuicheng <[email protected]>
wrote:

> Hi,
>
> In spec, eglCreatePbufferSurface is allowed to be called with attrib_list
> is NULL or empty, which means EGL_WIDTH/EGL_HEIGHT for the surface is 0.
>
> And in mesa code, specific to android path, I cannot find the width/height
> could be updated to a normal value.
>
> Also the eglMakeCurrent call after the eglCreatePbufferSurface, will use
> the 0 width/height to allocate buffer, which seems un-reasonable.
>
> Could you share me why 0 is allowed for width/height, and how app will use
> the PbufferSurface later?
>
> Thanks.
>
>
>
> Best Regards
>
> Shuicheng
>
>
>