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Simon Ser 8fe3aa29da xdg-shell: specify version in wlr_xdg_shell_create 
With protocol additions such as [1], compositors currently have no
way to opt out of the version upgrade. The protocol upgrade will
always be backwards-compatible but may require new compositor
features.

The status quo doesn't make it possible to ship a protocol addition
without breaking the wlroots API. This will be an issue for API
stabilization [2].

To address this, let compositors provide a maximum version in the
function creating the global. We need to support all previous versions
of the interface anyways because of older clients.

This mechanism works the same way as Wayland clients passing a version
in wl_global.bind.

[1]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3514
[2]: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/1008

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3397
2022-05-15 15:44:40 +00:00
..
.gitignore Tiny Wayland compositor 2018-08-15 18:27:48 -04:00
LICENSE CC0 2018-08-15 19:17:20 -04:00
Makefile tinywl: don't generate xdg-shell-protocol.c 2022-04-01 11:51:24 +03:00
meson.build tinywl: build with meson if examples option is enabled 2021-11-19 16:42:14 +00:00
README.md tinywl: remove outdated non-feature from README.md 2022-04-01 14:22:28 +00:00
tinywl.c xdg-shell: specify version in wlr_xdg_shell_create 2022-05-15 15:44:40 +00:00

README.md

TinyWL

This is the "minimum viable product" Wayland compositor based on wlroots. It aims to implement a Wayland compositor in the fewest lines of code possible, while still supporting a reasonable set of features. Reading this code is the best starting point for anyone looking to build their own Wayland compositor based on wlroots.

Building TinyWL

TinyWL is disconnected from the main wlroots build system, in order to make it easier to understand the build requirements for your own Wayland compositors. Simply install the dependencies:

  • wlroots
  • wayland-protocols

And run make.

Running TinyWL

You can run TinyWL with ./tinywl. In an existing Wayland or X11 session, tinywl will open a Wayland or X11 window respectively to act as a virtual display. You can then open Wayland windows by setting WAYLAND_DISPLAY to the value shown in the logs. You can also run ./tinywl from a TTY.

In either case, you will likely want to specify -s [cmd] to run a command at startup, such as a terminal emulator. This will be necessary to start any new programs from within the compositor, as TinyWL does not support any custom keybindings. TinyWL supports the following keybindings:

  • Alt+Escape: Terminate the compositor
  • Alt+F1: Cycle between windows

Limitations

Notable omissions from TinyWL:

  • HiDPI support
  • Any kind of configuration, e.g. output layout
  • Any protocol other than xdg-shell (e.g. layer-shell, for panels/taskbars/etc; or Xwayland, for proxied X11 windows)
  • Optional protocols, e.g. screen capture, primary selection, virtual keyboard, etc. Most of these are plug-and-play with wlroots, but they're omitted for brevity.