[gtk/wip/jimmac/fix-maximized-shadows-gtk3] adwaita: disable shadows when window is maximized, fullscreen, tiled

[Jakub Steiner <jimmac src gnome org>]

commit 6f4ebce9143a049368cf9c04610a4d1b4282cd8a
Author: Jakub Steiner <jimmac gmail com>
Date:   Wed Feb 10 18:18:10 2021 +0100

    adwaita: disable shadows when window is maximized, fullscreen, tiled
    
    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           | 2 +-
 gtk/theme/Adwaita/gtk-contained-dark.css | 2 +-
 gtk/theme/Adwaita/gtk-contained.css      | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 01d1dc9324..4510cfa784 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -4579,7 +4579,7 @@ decoration {
   .tiled-top &,
   .tiled-right &,
   .tiled-bottom &,
-  .tiled-left & { border-radius: 0; }
+  .tiled-left & { border-radius: 0; box-shadow: none; }
 
   .popup & { box-shadow: none; }
 
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index c10e35b9a2..a0e94dc079 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -1838,7 +1838,7 @@ decoration { border-radius: 8px 8px 0 0; border-width: 0px; box-shadow: 0 3px 9p
 
 decoration:backdrop { box-shadow: 0 3px 9px 1px transparent, 0 2px 6px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px 
rgba(27, 27, 27, 0.9); transition: 200ms ease-out; }
 
-.maximized decoration, .fullscreen decoration, .tiled decoration, .tiled-top decoration, .tiled-right 
decoration, .tiled-bottom decoration, .tiled-left decoration { border-radius: 0; }
+.maximized decoration, .fullscreen decoration, .tiled decoration, .tiled-top decoration, .tiled-right 
decoration, .tiled-bottom decoration, .tiled-left decoration { border-radius: 0; box-shadow: none; }
 
 .popup decoration { box-shadow: none; }
 
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index 3b4f3dd966..56b3af7641 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -1854,7 +1854,7 @@ decoration { border-radius: 8px 8px 0 0; border-width: 0px; box-shadow: 0 3px 9p
 
 decoration:backdrop { box-shadow: 0 3px 9px 1px transparent, 0 2px 6px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px 
rgba(0, 0, 0, 0.18); transition: 200ms ease-out; }
 
-.maximized decoration, .fullscreen decoration, .tiled decoration, .tiled-top decoration, .tiled-right 
decoration, .tiled-bottom decoration, .tiled-left decoration { border-radius: 0; }
+.maximized decoration, .fullscreen decoration, .tiled decoration, .tiled-top decoration, .tiled-right 
decoration, .tiled-bottom decoration, .tiled-left decoration { border-radius: 0; box-shadow: none; }
 
 .popup decoration { box-shadow: none; }