gentoo-overlay/kde-plasma/plasma-workspace/files/plasma-workspace-5.20.5-avoid-render-invisible-contents.patch

From 45e0a722fb85bb5d1ab8bef92080e934254b13aa Mon Sep 17 00:00:00 2001
From: David Edmundson <kde@davidedmundson.co.uk>
Date: Thu, 7 Jan 2021 13:36:29 +0000
Subject: [PATCH] [lookandfeel] Avoid rendering invisible contents

An opacity of 0 but still visible still results in nodes in the
scenegraph, which is wasteful.  This is shown in gammaray with some
warnings.

Enabled is also bound to visible as if a text field has focus it still
animates the cursor icon even if inivisble, producing wakeups.

BUG: 347772
FIXED-IN: 5.21
---
 lookandfeel/contents/lockscreen/LockScreenUi.qml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lookandfeel/contents/lockscreen/LockScreenUi.qml b/lookandfeel/contents/lockscreen/LockScreenUi.qml
index a2eba8e6d..83564fc0a 100644
--- a/lookandfeel/contents/lockscreen/LockScreenUi.qml
+++ b/lookandfeel/contents/lockscreen/LockScreenUi.qml
@@ -228,6 +228,12 @@ PlasmaCore.ColorScope {
             height: lockScreenRoot.height + units.gridUnit * 3
             focus: true //StackView is an implicit focus scope, so we need to give this focus so the item inside will have it
 
+            // this isn't implicit, otherwise items still get processed for the scenegraph
+            visible: opacity > 0
+            // changing enabled will toggle if an item can have activeFocus, which otherwise
+            //keeps the text cursor blinking even when invisble
+            enabled: visible
+
             initialItem: MainBlock {
                 id: mainBlock
                 lockScreenUiVisible: lockScreenRoot.uiVisible
-- 
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