<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED WONTFIX - How to find which DRI version is used by Wayland, and what is the method to change DRI version on Wayland?" href="https://bugs.freedesktop.org/show_bug.cgi?id=101681#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED WONTFIX - How to find which DRI version is used by Wayland, and what is the method to change DRI version on Wayland?" href="https://bugs.freedesktop.org/show_bug.cgi?id=101681">bug 101681</a> from <a class="email" href="mailto:daniel@fooishbar.org" title="Daniel Stone <daniel@fooishbar.org>"> Daniel Stone</a> <pre>(In reply to _nobody_ from <a href="show_bug.cgi?id=101681#c4">comment #4</a>) > The primary reason I posted this Bugzilla was to help Sam. But I had aside > agenda as well. To better understand the whole Xorg server and Wayland > server architectures, which you greatly contributed to it/understanding! :-) Glad to hear it. :) > And here is what I got from your explanation. > > [1] Regarding X11 clients and Xorg server I am correct, as I see; > [2] For Wayland clients, the following picture shows correct relations > between Wayland clients and Mesa, which beneath has something lookalike DRI3 > implementation for the 3D applications: > <a href="https://upload.wikimedia.org/wikipedia/commons/a/a7/">https://upload.wikimedia.org/wikipedia/commons/a/a7/</a> > Wayland_display_server_protocol.svg Indeed. > [3] I missed point where X11 client has to connect to Wayland server, if > Wayland is chosen as server. in such a case, Wayland will continue to > support legacy Xorg server architecture, but ONLY for DRI3. In other words, > backward compatibility for X11 clients on Wayland server is supported, but > ONLY for DRI3. In that case, the Wayland server starts a separate process, called Xwayland. Xwayland is an X11 server and a Wayland client: X11 clients connect to Xwayland (sending buffers over DRI3), and Xwayland then forwards those buffers to the Wayland server. So X11 clients do not know the difference (they connect to a real X11 server), and all the translation between X11/Wayland is done inside this server. It is _in theory_ possible for Xwayland to implement DRI2 for X11 clients, but this is much more work than just fixing DRI3 for you; also fixing DRI3 has a larger benefit for everyone. > One more question for you, Daniel, if you allow: do you guys, allow Wayland > clients to run with Xorg server? I assume the answer is NO (forward > compatibility for Wayland clients on Xorg server is not supported)? Right, so far there is no kind of reverse-Xwayland. The closest equivalent is running Weston/Mutter/etc under X11, but this is not seamless in the same way that Xwayland is (i.e. showing the clients as part of your regular desktop). I probably wouldn't expect there to be either.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>