9c4213ed3e
The only way to attach some data to a wl_client seems to be setting up a destroy listener and use wl_container_of. Let's make it straight forward to attach some data. Having an explicit destroy callback for the user data makes managing the user data lifetime much more convenient. All other callbacks, be they wl_resource request listeners, destroy listeners or destructors, or wl_client destroy listeners, can assume that the wl_client user data still exists if it was set. Otherwise making that guarantee would be complicated. Co-authored-by: Pekka Paalanen <pekka.paalanen@collabora.com> Signed-off-by: Sebastian Wick <sebastian@sebastianwick.net> |
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Wayland
Wayland is a project to define a protocol for a compositor to talk to its clients as well as a library implementation of the protocol. The compositor can be a standalone display server running on Linux kernel modesetting and evdev input devices, an X application, or a wayland client itself. The clients can be traditional applications, X servers (rootless or fullscreen) or other display servers.
The wayland protocol is essentially only about input handling and buffer management. The compositor receives input events and forwards them to the relevant client. The clients creates buffers and renders into them and notifies the compositor when it needs to redraw. The protocol also handles drag and drop, selections, window management and other interactions that must go through the compositor. However, the protocol does not handle rendering, which is one of the features that makes wayland so simple. All clients are expected to handle rendering themselves, typically through cairo or OpenGL.
Building the wayland libraries is fairly simple, aside from libffi, they don't have many dependencies:
$ git clone https://gitlab.freedesktop.org/wayland/wayland
$ cd wayland
$ meson build/ --prefix=PREFIX
$ ninja -C build/ install
where PREFIX is where you want to install the libraries.
See https://wayland.freedesktop.org for documentation.