QQuickWidget - QOpenGLFramebufferObject::release() called from incompatible context

aatwo

Hi all.

I am trying to render a QQuickWidget (which contains a QML application) to an offscreen surface which I am rendering to a surface in my game. However I am encountering the following warning contantly and my application is leaking memory very quickly:

QOpenGLFramebufferObject::release() called from incompatible context

This is strange because if I swap the QQuickWidget for any normal QWidget derrived class (e.g. a QDial) I get absolutely no warnings / memory leakage.

Does anyone have any idea why this is happening?

My code looks roughly like this:

// Variable types defined in header
QOpenGLContext* openGLContext;
QGraphicsScene* graphicsScene;
QOpenGLFramebufferObject* openGLFrameBuffer;
QOffscreenSurface* offscreenSurface ;

// Render loop
void Render()
{
    openGLContext->makeCurrent( offscreenSurface );
    openGLFrameBuffer->bind();

    QOpenGLPaintDevice device( openGLFrameBuffer->size() );
    QPainter painter( &device );
    graphicsScene->render( &painter );

    openGLFrameBuffer->release();

    GLuint unTexture = openGLFrameBuffer->texture();

    ...