From 461fe36707a346957e4efac56ca504a23bfa2006 Mon Sep 17 00:00:00 2001
From: Christian Hergert <chergert@redhat.com>
Date: Wed, 3 Feb 2021 16:15:02 -0800
Subject: [PATCH] adwaita: disable shadows when window is maximized or
 fullscreen

These shadows cause a significant draw performance drop for maximized
windows. Disabling them increases the chances we can have faster scroll
performance of text.

There is some risk here for systems where they have a dock and you expect
the shadow to draw beneath that dock for transparency reasons.
---
 gtk/theme/Adwaita/_common.scss | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 5588e4fb40..e7c33f8d19 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -4100,6 +4100,9 @@ window {
 
       &:backdrop { box-shadow: inset 0 0 0 3px $backdrop_bg_color, inset 0 1px $top_hilight; }
     }
+
+    &.maximized,
+    &.fullscreen { box-shadow: none; }
   }
 
   &.maximized,
-- 
2.30.2