From 93e8009c78831b5f2e00e84513d1b523a5128421 Mon Sep 17 00:00:00 2001
From: Uwe Rathmann <Uwe.Rathmann@tigertal.de>
Date: Mon, 28 Oct 2019 09:41:12 +0100
Subject: [PATCH] 0 filling of the FBO in the OpenGL path

---
 src/nodes/QskTextureRenderer.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/nodes/QskTextureRenderer.cpp b/src/nodes/QskTextureRenderer.cpp
index f0f6471d..aaedfcaf 100644
--- a/src/nodes/QskTextureRenderer.cpp
+++ b/src/nodes/QskTextureRenderer.cpp
@@ -42,6 +42,10 @@ static uint qskCreateTextureOpenGL(
     {
         QPainter painter( &pd );
 
+        painter.setCompositionMode( QPainter::CompositionMode_Source );
+        painter.fillRect( 0, 0, width, height, Qt::transparent );
+        painter.setCompositionMode( QPainter::CompositionMode_SourceOver );
+
         helper->paint( &painter, size );
 
 #if 1