Enable picom

modules/desktop/default.nix

@@ -36,6 +36,69 @@ in {
       };
 
       services = {
+        picom = {
+          backend = "glx";
+          vSync = true;
+          opacityRules = [
+            # "100:class_g = 'Firefox'"
+            # Art/image programs where we need fidelity
+            "100:class_g = 'Gimp'"
+            "100:class_g = 'Inkscape'"
+            "100:class_g = 'aseprite'"
+            "100:class_g = 'krita'"
+            "100:class_g = 'feh'"
+            "100:class_g = 'mpv'"
+            "100:class_g = 'Rofi'"
+            "100:class_g = 'Peek'"
+            "99:_NET_WM_STATE@:32a = '_NET_WM_STATE_FULLSCREEN'"
+          ];
+          shadowExclude = [
+            # Put shadows on notifications, the scratch popup and rofi only
+            "! name~='(rofi|scratch|Dunst)$'"
+          ];
+
+          fade = true;
+          fadeDelta = 1;
+          fadeSteps = [ 1.0e-2 1.2e-2 ];
+          shadow = true;
+          shadowOffsets = [ (-10) (-10) ];
+          shadowOpacity = 0.22;
+          # activeOpacity = "1.00";
+          # inactiveOpacity = "0.92";
+          #
+          settings = {
+            blur-background-exclude = [
+              "window_type = 'dock'"
+              "window_type = 'desktop'"
+              "class_g = 'Rofi'"
+              "_GTK_FRAME_EXTENTS@:c"
+            ];
+
+            # Unredirect all windows if a full-screen opaque window is detected, to
+            # maximize performance for full-screen windows. Known to cause
+            # flickering when redirecting/unredirecting windows.
+            unredir-if-possible = true;
+
+            # GLX backend: Avoid using stencil buffer, useful if you don't have a
+            # stencil buffer. Might cause incorrect opacity when rendering
+            # transparent content (but never practically happened) and may not work
+            # with blur-background. My tests show a 15% performance boost.
+            # Recommended.
+            glx-no-stencil = true;
+
+            # Use X Sync fence to sync clients' draw calls, to make sure all draw
+            # calls are finished before picom starts drawing. Needed on
+            # nvidia-drivers with GLX backend for some users.
+            xrender-sync-fence = true;
+
+            shadow-radius = 12;
+            # blur-background = true;
+            # blur-background-frame = true;
+            # blur-background-fixed = true;
+            blur-kern = "7x7box";
+            blur-strength = 320;
+          };
+        };
         nextcloud-client.enable = true;
         udiskie.enable = true;
         gpg-agent = {