[gnome-shell] windowManager: Use MetaWindowActor.paint_to_content() for window effects

[Marge Bot <marge-bot src gnome org>]

commit 36a1fb78cddf4be8b26430ff3ab998600356f075
Author: Robert Mader <robert mader posteo de>
Date:   Sun Jun 6 14:29:47 2021 +0200

    windowManager: Use MetaWindowActor.paint_to_content() for window effects
    
    Previously we used `get_image()`, which returned `cairo_surface`,
    in order to create a `ClutterContent` with a screenshot of the
    `MetaWindowActor`. This added a roundtrip from GPU to CPU memory.
    
    Instead, use the new `paint_to_content()` API which lets us use a
    `CoglTexture` directly as source of our `ClutterContent`.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1879>

 js/ui/windowManager.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/windowManager.js b/js/ui/windowManager.js
index c485fd0f99..caaecec410 100644
--- a/js/ui/windowManager.js
+++ b/js/ui/windowManager.js
@@ -1283,7 +1283,7 @@ var WindowManager = class {
     _prepareAnimationInfo(shellwm, actor, oldFrameRect, _change) {
         // Position a clone of the window on top of the old position,
         // while actor updates are frozen.
-        let actorContent = Shell.util_get_content_for_window_actor(actor, oldFrameRect);
+        let actorContent = actor.paint_to_content(oldFrameRect);
         let actorClone = new St.Widget({ content: actorContent });
         actorClone.set_offscreen_redirect(Clutter.OffscreenRedirect.ALWAYS);
         actorClone.set_position(oldFrameRect.x, oldFrameRect.y);