From 1d13522190346b20bf079ae48ce919c9e15a2c7a Mon Sep 17 00:00:00 2001
From: Jani Hautakangas <ext-jani.hautakangas@nokia.com>
Date: Mon, 23 Aug 2010 12:54:49 +0300
Subject: On Symbian QGLWidget::glDraw() must do nothing if widget isn't
 visible. Otherwise application crashes because rendering to invisible window
 surface will panic eventually.

Reviewed-by: Trond
---
 src/opengl/qgl.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index 51187cf..9e69816 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -4445,6 +4445,11 @@ void QGLWidget::glDraw()
     Q_D(QGLWidget);
     if (!isValid())
         return;
+#ifdef Q_OS_SYMBIAN
+    // Crashes on Symbian if trying to render to invisible surfaces
+    if (!isVisible() && d->glcx->device()->devType() == QInternal::Widget)
+        return;
+#endif
     makeCurrent();
 #ifndef QT_OPENGL_ES
     if (d->glcx->deviceIsPixmap())
-- 
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