1 files changed, 7 insertions, 0 deletions

diff --git a/include/sway/surface.h b/include/sway/surface.h
index 06874af2..4da96c02 100644
--- a/include/sway/surface.h
+++ b/include/sway/surface.h
@@ -6,6 +6,13 @@ struct sway_surface {
         struct wlr_surface *wlr_surface;
 
         struct wl_listener destroy;
+
+        /**
+         * This timer can be used for issuing delayed frame done callbacks (for
+         * example, to improve presentation latency). Its handler is set to a
+         * function that issues a frame done callback to this surface.
+         */
+        struct wl_event_source *frame_done_timer;
 };
 
 #endif