From dbf08f32cd06ebf5ef4eeeb53fa5bab69bab57b3 Mon Sep 17 00:00:00 2001
From: Michael Brasser <mbrasser@ford.com>
Date: Wed, 27 Jan 2021 08:34:44 -0600
Subject: Do less work when there are no active ImageParticle particles
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Don't mark geometry and material as dirty if there is nothing to change.

Task-number: QTBUG-41867
Change-Id: I016d2d76f4ebf731f5bfc931ba616ee5d074bc65
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
(cherry picked from commit e3cb305a6a19bf394c1068a7e483e1c95e11c22b)
---
 src/particles/qquickimageparticle_p.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/particles/qquickimageparticle_p.h')

diff --git a/src/particles/qquickimageparticle_p.h b/src/particles/qquickimageparticle_p.h
index 6eadfe10de..b040426a61 100644
--- a/src/particles/qquickimageparticle_p.h
+++ b/src/particles/qquickimageparticle_p.h
@@ -363,7 +363,7 @@ protected:
     void commit(int gIdx, int pIdx) override;
 
     QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *) override;
-    void prepareNextFrame(QSGNode**);
+    bool prepareNextFrame(QSGNode**);
     void buildParticleNodes(QSGNode**);
 
     void sceneGraphInvalidated() override;
@@ -460,6 +460,7 @@ private:
     int m_startedImageLoading;
     QRhi *m_rhi;
     bool m_apiChecked;
+    bool m_previousActive;
 };
 
 QT_END_NAMESPACE
-- 
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