screenshot: Enable opacity redirect for the panel

This makes the panel look correct when it fades out (e.g. while dragging
the area selection around or while the screenshot UI is fading in and
out).

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2138>

diff --git a/js/ui/screenshot.js b/js/ui/screenshot.js
index 5c338120e16bc9f8f147c41aec5254a353f815e0..56f3cab7f1f0f52331e4241b2a949c4fbb92b670 100644 (file)
--- a/js/ui/screenshot.js
+++ b/js/ui/screenshot.js
@@ -1081,6 +1081,7 @@ var ScreenshotUI = GObject.registerClass({
             y_align: Clutter.ActorAlign.END,
             y_expand: true,
             vertical: true,
+            offscreen_redirect: Clutter.OffscreenRedirect.AUTOMATIC_FOR_OPACITY,
         });
         this._primaryMonitorBin.add_child(this._panel);