libweston: Create the 'timeline' scope

With everything now in place, it is time to create the timeline scope.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>

include/libweston/libweston.h

@@ -1118,6 +1118,7 @@ struct weston_compositor {
 
 	struct weston_log_context *weston_log_ctx;
 	struct weston_log_scope *debug_scene;
+	struct weston_log_scope *timeline;
 
 	struct content_protection *content_protection;
 };

libweston/compositor.c

@@ -7294,6 +7294,12 @@ weston_compositor_create(struct wl_display *display,
 						debug_scene_graph_cb, NULL,
 						ec);
 
+	ec->timeline =
+		weston_compositor_add_log_scope(ec->weston_log_ctx, "timeline",
+						"Timeline event points\n",
+						weston_timeline_create_subscription,
+						weston_timeline_destroy_subscription,
+						ec);
 	return ec;
 
 fail:
@@ -7618,6 +7624,9 @@ weston_compositor_tear_down(struct weston_compositor *compositor)
 
 	weston_compositor_log_scope_destroy(compositor->debug_scene);
 	compositor->debug_scene = NULL;
+
+	weston_compositor_log_scope_destroy(compositor->timeline);
+	compositor->timeline = NULL;
 }
 
 /** Destroys the compositor.

libweston/weston-log-internal.h

@@ -108,4 +108,12 @@ weston_log_subscription_get_data(struct weston_log_subscription *sub);
 void
 weston_log_subscription_set_data(struct weston_log_subscription *sub, void *data);
 
+void
+weston_timeline_create_subscription(struct weston_log_subscription *sub,
+				    void *user_data);
+
+void
+weston_timeline_destroy_subscription(struct weston_log_subscription *sub,
+				     void *user_data);
+
 #endif /* WESTON_LOG_INTERNAL_H */