From 0820a38252dd4a42b94f8e80bb517ba6ef0bb9c2 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 11 Aug 2026 08:50:05 +0530
Subject: [PATCH] Northern lights should stop animating on idle/focus out

---
 kitty/shaders/custom/northern-lights.pipeline | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kitty/shaders/custom/northern-lights.pipeline b/kitty/shaders/custom/northern-lights.pipeline
index 0d29d9c37..72e892b72 100644
--- a/kitty/shaders/custom/northern-lights.pipeline
+++ b/kitty/shaders/custom/northern-lights.pipeline
@@ -1,18 +1,22 @@
 textures a persist
 
 startgroup
+    animation_start os-window-focus-in | user-activity
+    animation_stop os-window-focus-out | user-idle
     var int STAGE = 0
     shaders northern-lights
     output_texture a
 endgroup
 
 startgroup
+    attach
     var int STAGE = 1
     shaders northern-lights
     output_texture persist
 endgroup
 
 startgroup
+    attach
     var int STAGE = 2
     shaders northern-lights
 endgroup