backend: remove wlr_backend_get_renderer

backend/backend.c

@@ -45,9 +45,6 @@ void wlr_backend_init(struct wlr_backend *backend,
 
 void wlr_backend_finish(struct wlr_backend *backend) {
 	wlr_signal_emit_safe(&backend->events.destroy, backend);
-	if (backend->has_own_renderer) {
-		wlr_renderer_destroy(backend->renderer);
-	}
 }
 
 bool wlr_backend_start(struct wlr_backend *backend) {
@@ -69,36 +66,6 @@ void wlr_backend_destroy(struct wlr_backend *backend) {
 	}
 }
 
-static bool backend_create_renderer(struct wlr_backend *backend) {
-	if (backend->renderer != NULL) {
-		return true;
-	}
-
-	backend->renderer = wlr_renderer_autocreate(backend);
-	if (backend->renderer == NULL) {
-		return false;
-	}
-
-	backend->has_own_renderer = true;
-	return true;
-}
-
-struct wlr_renderer *wlr_backend_get_renderer(struct wlr_backend *backend) {
-	if (backend->impl->get_renderer) {
-		return backend->impl->get_renderer(backend);
-	}
-	if (backend_get_buffer_caps(backend) != 0) {
-		// If the backend is capable of presenting buffers, automatically create
-		// the renderer if necessary.
-		if (!backend_create_renderer(backend)) {
-			wlr_log(WLR_ERROR, "Failed to create backend renderer");
-			return NULL;
-		}
-		return backend->renderer;
-	}
-	return NULL;
-}
-
 struct wlr_session *wlr_backend_get_session(struct wlr_backend *backend) {
 	if (backend->impl->get_session) {
 		return backend->impl->get_session(backend);

include/wlr/backend.h

@@ -25,11 +25,6 @@ struct wlr_backend {
 		/** Raised when new outputs are added, passed the wlr_output */
 		struct wl_signal new_output;
 	} events;
-
-	// Private state
-
-	bool has_own_renderer;
-	struct wlr_renderer *renderer;
 };
 
 /**
@@ -49,10 +44,6 @@ bool wlr_backend_start(struct wlr_backend *backend);
  * automatically when the wl_display is destroyed.
  */
 void wlr_backend_destroy(struct wlr_backend *backend);
-/**
- * Obtains the wlr_renderer reference this backend is using.
- */
-struct wlr_renderer *wlr_backend_get_renderer(struct wlr_backend *backend);
 /**
  * Obtains the wlr_session reference from this backend if there is any.
  * Might return NULL for backends that don't use a session.

include/wlr/backend/interface.h

@@ -16,7 +16,6 @@
 struct wlr_backend_impl {
 	bool (*start)(struct wlr_backend *backend);
 	void (*destroy)(struct wlr_backend *backend);
-	struct wlr_renderer *(*get_renderer)(struct wlr_backend *backend);
 	struct wlr_session *(*get_session)(struct wlr_backend *backend);
 	clockid_t (*get_presentation_clock)(struct wlr_backend *backend);
 	int (*get_drm_fd)(struct wlr_backend *backend);