backend: create renderer and allocator in wlr_backend_autocreate

Instead of ensuring the renderer and allocator are initialized in each
backend, do it in wlr_backend_autocreate. This allows compositors to
create backends without any renderer/allocator if they side-step
wlr_backend_autocreate.

Since the wlr_backend_get_renderer and backend_get_allocator end up
calling wlr_renderer_autocreate and wlr_allocator_autocreate, it sounds
like a good idea to centralize all of the opimionated bits in one place.

1 files changed, 0 insertions, 7 deletions

diff --git a/backend/drm/backend.c b/backend/drm/backend.c
index 52230592..9ae4dbf0 100644
--- a/backend/drm/backend.c
+++ b/backend/drm/backend.c
@@ -11,7 +11,6 @@
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/util/log.h>
 #include <xf86drm.h>
-#include "backend/backend.h"
 #include "backend/drm/drm.h"
 #include "util/signal.h"
 
@@ -258,12 +257,6 @@ struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
 		}
 	}
 
-	struct wlr_renderer *renderer = wlr_backend_get_renderer(&drm->backend);
-	struct wlr_allocator *allocator = backend_get_allocator(&drm->backend);
-	if (renderer == NULL || allocator == NULL) {
-		goto error_mgpu_renderer;
-	}
-
 	drm->session_destroy.notify = handle_session_destroy;
 	wl_signal_add(&session->events.destroy, &drm->session_destroy);