1 files changed, 12 insertions, 5 deletions
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index e84bc29..f98dcff 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -190,7 +190,10 @@ public:
     QGLWidget *shareWidget() {
         if (!initializing && !widget && !cleanedUp) {
             initializing = true;
-            widget = new QGLWidget;
+
+            widget = new QGLWidget(QGLFormat(QGL::SingleBuffer | QGL::NoDepthBuffer | QGL::NoStencilBuffer));
+            widget->resize(1, 1);
+
             // We dont need this internal widget to appear in QApplication::topLevelWidgets()
             if (QWidgetPrivate::allWidgets)
                 QWidgetPrivate::allWidgets->remove(widget);
@@ -342,12 +345,14 @@ QGLWindowSurface::~QGLWindowSurface()
 
 void QGLWindowSurface::deleted(QObject *object)
 {
-    // Make sure that the fbo is destroyed before destroying its context.
-    delete d_ptr->fbo;
-    d_ptr->fbo = 0;
-
     QWidget *widget = qobject_cast<QWidget *>(object);
     if (widget) {
+        if (widget == window()) {
+            // Make sure that the fbo is destroyed before destroying its context.
+            delete d_ptr->fbo;
+            d_ptr->fbo = 0;
+        }
+
         QWidgetPrivate *widgetPrivate = widget->d_func();
         if (widgetPrivate->extraData()) {
             union { QGLContext **ctxPtr; void **voidPtr; };
@@ -419,6 +424,8 @@ QPaintDevice *QGLWindowSurface::paintDevice()
 
     QGLContext *ctx = reinterpret_cast<QGLContext *>(window()->d_func()->extraData()->glContext);
     ctx->makeCurrent();
+
+    Q_ASSERT(d_ptr->fbo);
     return d_ptr->fbo;
 }