Add lite damage tracking

This skips the renderer if nothing has changed, and renders
everything otherwise.

3 files changed, 16 insertions, 3 deletions

diff --git a/include/sway/output.h b/include/sway/output.h
index 6fb79987..b4980cd8 100644
--- a/include/sway/output.h
+++ b/include/sway/output.h
@@ -5,6 +5,7 @@
 #include <wayland-server.h>
 #include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_output.h>
+#include "sway/tree/view.h"
 
 struct sway_server;
 struct sway_container;
@@ -13,17 +14,26 @@ struct sway_output {
         struct wlr_output *wlr_output;
         struct sway_container *swayc;
         struct sway_server *server;
-        struct timespec last_frame;
 
         struct wl_list layers[4]; // sway_layer_surface::link
         struct wlr_box usable_area;
 
-        struct wl_listener frame;
+        struct timespec last_frame;
+        struct wlr_output_damage *damage;
+
         struct wl_listener destroy;
         struct wl_listener mode;
         struct wl_listener transform;
 
+        struct wl_listener damage_destroy;
+        struct wl_listener damage_frame;
+
         pid_t bg_pid;
 };
 
+void output_damage_whole(struct sway_output *output);
+
+void output_damage_whole_view(struct sway_output *output,
+        struct sway_view *view);
+
 #endif
diff --git a/include/sway/server.h b/include/sway/server.h
index db81932f..61f21cdb 100644
--- a/include/sway/server.h
+++ b/include/sway/server.h
@@ -25,7 +25,6 @@ struct sway_server {
         struct sway_input_manager *input;
 
         struct wl_listener new_output;
-        struct wl_listener output_frame;
 
         struct wlr_layer_shell *layer_shell;
         struct wl_listener layer_shell_surface;
diff --git a/include/sway/tree/view.h b/include/sway/tree/view.h
index 54f6d90e..526a8485 100644
--- a/include/sway/tree/view.h
+++ b/include/sway/tree/view.h
@@ -113,4 +113,8 @@ void view_close(struct sway_view *view);
 
 void view_update_outputs(struct sway_view *view, const struct wlr_box *before);
 
+void view_damage_whole(struct sway_view *view);
+
+void view_damage_from(struct sway_view *view);
+
 #endif