On Thu, 20 Mar 2014 13:31:31 +0000 "Konopelko, Pavel (P.)" <pkono...@visteon.com> wrote:
> Hello everybody, > > Question: > Given that somebody has Wayland/Weston 1.3 already integrated in > their system, what would it take to upgrade to the upcoming > Wayland/Weston 1.5? Is this just a matter of re-building it and > everything will continue working out of the box? Are there any > adjustments in the graphics stack (drivers, EGL support, etc.) needed > to support 1.5? Are there any adjustments on the application side > needed to work with 1.5? Hi, oh, 1.3 seems like ages ago, I can't remember. But, looking at the git history of few selected files should be enlightening, for instance in Wayland src/wayland-client.h and src/wayland-server.h, and also the protocol specification in protocol/wayland.xml. In Weston src/compositor.h. For clients, things are kept backward-compatible. For Weston plugins, change from 1.n to 1.n+1 is not guaranteed to be compatible. Libwayland API is stable and backward-compatible. The Wayland protocol is also kept stable, but we are moving from wl_shell to xdg_shell, though that probably does not concern you. On EGL front, you probably should be looking at the history of the specification files in Mesa, e.g.: http://cgit.freedesktop.org/mesa/mesa/log/docs/specs/WL_bind_wayland_display.spec to get an overview. I think application side should just work, all in all. > Background: > The question is related to the weston-ivi-shell patch series > submitted by Nobuhiko Tanibata. This work is connected to the work > that GENIVI [1] previously did in the area of IVI Layer Management. > On the GENIVI side, the original plan was to propose the ivi-shell > and the corresponding protocol to the Wayland project. However, it > was expected that it will take time to review and agree the > protocols. Until then the plan provided for adopting an out-of-tree > patch based on Wayland/Weston 1.3 for GENIVI purposes. Once the > ivi-shell would be integrated in Wayland/Weston, GENIVI would switch > to the upstream version. > > Now that the patch series was well accepted and that only a few > changes were suggested to the original protocol, it would make more > sense for GENIVI to align with the upstream right away. The only > catch is that the content of the next GENIVI release is being > finalized right now and the decision must be done quickly. During > the original reviews in GENIVI, using Wayland/Weston 1.3 as the basis > was already approved. The above question is an attempt to estimate > the impact of adopting 1.5 instead. Any hints and information on > possible upgrade problems would be therefore greatly appreciated. Sorry, I think "well accepted" may still be a slight overstatement at the moment. It's just so hard to find time to review anything. When you get a "looks good to me" then that's accepted by that particular person, but even that is not enough to get into Wayland/Weston upstream. For that you need to convince Kristian, who seems to be extremely busy nowadays. Thanks, pq _______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/wayland-devel
