Using QGraphicsView::render() and QPainter to render the graphicsview's viewport onto a QOpenGLPaintDevice fails if the scene consists of a large image

Using QGraphicsView::render() and QPainter to render the graphicsview's viewport onto a QOpenGLPaintDevice fails if the scene consists of a large image. This happens even though the image is fitted in the view, and thus, the image rendered is not large. If this is a limitation of this method it should be documented.

Steps to reproduce:

• run the sample attached
• press "Render" button
  EXPECTED: rendered images appear on the QOpenGLWidgets
  ACTUAL: the large image does not appear. only the smaller image used for comparison appears.