Update surface fractional scale on output change

Closes: https://github.com/swaywm/sway/issues/7464

3 files changed, 9 insertions, 1 deletions

diff --git a/include/sway/surface.h b/include/sway/surface.h
index 50681897..a7a8ec3f 100644
--- a/include/sway/surface.h
+++ b/include/sway/surface.h
@@ -15,6 +15,7 @@ struct sway_surface {
         struct wl_event_source *frame_done_timer;
 };
 
+void surface_update_outputs(struct wlr_surface *surface);
 void surface_enter_output(struct wlr_surface *surface,
         struct sway_output *output);
 void surface_leave_output(struct wlr_surface *surface,
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index 141edb49..302f9fda 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -859,6 +859,12 @@ static void update_textures(struct sway_container *con, void *data) {
         container_update_marks_textures(con);
 }
 
+static void update_output_scale_iterator(struct sway_output *output,
+                struct sway_view *view, struct wlr_surface *surface,
+                struct wlr_box *box, void *user_data) {
+        surface_update_outputs(surface);
+}
+
 static void handle_commit(struct wl_listener *listener, void *data) {
         struct sway_output *output = wl_container_of(listener, output, commit);
         struct wlr_output_event_commit *event = data;
@@ -873,6 +879,7 @@ static void handle_commit(struct wl_listener *listener, void *data) {
 
         if (event->committed & WLR_OUTPUT_STATE_SCALE) {
                 output_for_each_container(output, update_textures, NULL);
+                output_for_each_surface(output, update_output_scale_iterator, NULL);
         }
 
         if (event->committed & (WLR_OUTPUT_STATE_TRANSFORM | WLR_OUTPUT_STATE_SCALE)) {
diff --git a/sway/desktop/surface.c b/sway/desktop/surface.c
index 949cfdc2..68772ee0 100644
--- a/sway/desktop/surface.c
+++ b/sway/desktop/surface.c
@@ -47,7 +47,7 @@ void handle_compositor_new_surface(struct wl_listener *listener, void *data) {
         }
 }
 
-static void surface_update_outputs(struct wlr_surface *surface) {
+void surface_update_outputs(struct wlr_surface *surface) {
         float scale = 1;
         struct wlr_surface_output *surface_output;
         wl_list_for_each(surface_output, &surface->current_outputs, link) {