On Mon, Aug 12, 2013 at 3:05 PM, Marek Olšák <mar...@gmail.com> wrote: > On Mon, Aug 12, 2013 at 11:36 PM, Stéphane Marchesin > <stephane.marche...@gmail.com> wrote: >>> Other than hybrid systems (of which >>> there are none with i915 graphics), is there any case where >>> __DRI_IMAGE_USE_SHARE can occur? >> >> You could do interesting things like cross-process sharing with it. I >> think it's worth doing it, no matter what. It's easy to pick up now, >> and hard to fix up later. > > Cross-process sharing is mandatory already and exposed via > resource_from_handle and resource_get_handle. I don't think this is > useful for cross-process sharing anyway, because it disables tiling.
No, we need a different flag for this. I can't speak to the gallium flag, but the __DRI_IMAGE_USE_SHARE flag is use for same-gpu cross process sharing under wayland, either using GEM names or Prime fd passing. We can't drop tiling in this case, there's an obvious performance penalty. We need a flag to indicate that a buffer will be used on multiple GPUs. The next level up in the stack (src/egl/drivers/dri2/platform_wayland.c in case of Wayland) needs to know whether or not a buffer will be used in this way and pass the flag when applicable. Kristian _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
