Thanks a lot. Would you know if/when Wayland will support OpenGL? Rainer
On Mon, Jun 20, 2016 at 4:46 PM, Daniel Stone <daniel at fooishbar.org> wrote: > Hi Rainer, > > On 17 June 2016 at 22:00, Rainer Hochecker <fernetmenta at kodi.tv> wrote: > > I agree. GLX_OML_sync_control fulfils all our requirements apart from > being > > available for EGL. It would be great to have it available for EGL. In > regard > > to Wayland this is really important. For the time being Kodi stopped > > supporting Wayland because a/v sync is not possible on that platform. > > This isn't true. For Wayland, you can use the wp_presentation_time > extension: > > https://cgit.freedesktop.org/wayland/wayland-protocols/tree/stable/presentation-time/presentation-time.xml > > If you're using the zwp_linux_dmabuf extension directly, then you can > easily and obviously use the extension to get feedback, and there are > examples of using this. But even if you're using EGL, Wayland's EGL > client platform has the property that a wl_surface::commit request > must be issued from inside eglSwapBuffers. So you can make use of this > to issue a presentation_time feedback request immediately before > calling eglSwapBuffers, which will return a unique event giving you > the exact time that the buffer swap was actually displayed on screen. > This is far better than vblank requests which only give you hardware > clock ticks, and tell you nothing about actual display time. > > I do discuss this with Peter occasionally, but please get in touch if > you feel there is anything else missing, because we have gone to great > lengths to make Wayland as good as it possibly can be for exactly > these usecases. > > Cheers, > Daniel > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20160620/9348a018/attachment-0001.html>
