From 2aabe2eef38868107f0011bf91e68cda3bf2fb19 Mon Sep 17 00:00:00 2001
From: Leon Styhre <leon@leonstyhre.com>
Date: Wed, 19 Jan 2022 19:31:27 +0100
Subject: [PATCH] Reduced CPU usage significantly when a menu is open.

---
 es-core/src/Window.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/es-core/src/Window.cpp b/es-core/src/Window.cpp
index 1ee087921..89abbdd7e 100644
--- a/es-core/src/Window.cpp
+++ b/es-core/src/Window.cpp
@@ -438,6 +438,16 @@ void Window::render()
                  Settings::getInstance()->getString("ScreensaverType") == "slideshow")
             renderBottom = false;
 
+        // Don't render the bottom if the menu is open and the opening animation has finished
+        // playing. If the background is invalidated rendering will be enabled briefly until
+        // a new cached background has been generated.
+        if (mGuiStack.size() > 1 && mCachedBackground) {
+            if ((Settings::getInstance()->getString("MenuOpeningEffect") == "scale-up" &&
+                 mBackgroundOverlayOpacity == 255) ||
+                Settings::getInstance()->getString("MenuOpeningEffect") != "scale-up")
+                renderBottom = false;
+        }
+
         if (renderBottom)
             bottom->render(trans);