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  1. Qt
  2. QTBUG-59318

QGraphicsView fails to properly set QOpenGLContex::defaultFramebufferObject

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      I'm using QGraphicsView with QOpenGLWidget as viewport. When using QOpenGLFramebufferObject::release() within QGraphicsItem::paint() the current OpenGL framebuffer is set to the system's default and not to the QOpenGLWidget's framebuffer.

      QOpenGLWidgetPrivate::invokeUserPaint() sets a flag on QOpenGLContext before calling virtual QOpenGLWidget::paintGL(). QOpenGLContext::defaultFramebufferObject() then returns the QOpenGLWidget's framebuffer while in paintGL().

      This initialization step seems to be missing when using QOpenGLWidget as viewport for QGraphicsView.

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            lagocs Laszlo Agocs
            tfm123 Ole
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