It's probably driver-specific. Some drivers might need glFlush before
you use gbm_bo_map because gbm might only wait for work that has been
flushed.
Marek
On Sat, Jun 15, 2024 at 4:29 AM Pierre Ossman wrote:
>
> On 15/06/2024 07:54, Marek Olšák wrote:
> > gbm_bo_map synchronizes if it needs to move memory to make the buffer
> > readable by the CPU or if the buffer is being used/written by the GPU.
> >
>
> Great, thanks! That means I need to look elsewhere for the source of my
> issue.
>
> I was concerned that since I was accessing the data using gbm_bo_map(),
> rather than using OpenGL, I was missing out on some synchronisation step
> and getting data before the GPU had finished any queued rendering.
>
> Regards
> --
> Pierre Ossman Software Development
> Cendio AB http://cendio.com
> Teknikringen 8 http://twitter.com/ThinLinc
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> Phone: +46-13-214600
>
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
>
