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backend: return wlr_session in wlr_backend_autocreate() call

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Up until now, wlr_backend_autocreate() created the wlr_session and
then stuffed it into struct wlr_multi_backend so that compositors
can grab it later.

This is an abuse of wlr_multi_backend and the wlr_backend API:
wlr_backend_get_session() and wlr_multi_backend.session only exist
to accomodate the needs of wlr_backend_autocreate(). What's more,
the DRM and libinput backends don't implement
wlr_backend_impl.get_session.

Instead, return the struct wlr_session to the compositor in the
wlr_backend_autocreate() call. wlr_backend_get_session() will be
removed in the next commit.
This commit is contained in:
Simon Ser 2022-11-03 18:25:05 +01:00 • committed by Alexander Orzechowski
parent 265439600e
commit 41b7acbab7
13 changed files with 57 additions and 50 deletions
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6
include/wlr/backend.h
View file

@ -34,8 +34,12 @@ struct wlr_backend {
* Automatically initializes the most suitable backend given the environment.
* Will always return a multi-backend. The backend is created but not started.
* Returns NULL on failure.
*
* If session_ptr is not NULL, it's populated with the session which has been
* created with the backend, if any.
*/
struct wlr_backend *wlr_backend_autocreate(struct wl_display *display);
struct wlr_backend *wlr_backend_autocreate(struct wl_display *display,
struct wlr_session **session_ptr);
/**
* Start the backend. This may signal new_input or new_output immediately, but
* may also wait until the display's event loop begins. Returns false on