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  1. Qt
  2. QTBUG-59318

QGraphicsView fails to properly set QOpenGLContex::defaultFramebufferObject

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Done
    • Affects Version/s: 5.7.1
    • Fix Version/s: 5.9.0 Beta 2
    • Component/s: GUI: OpenGL, Widgets: GraphicsView
    • Labels:
      None
    • Environment:
      Debian, GCC 6.2.1, Qt 5.7.1

      Description

      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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            Assignee:
            lagocs Laszlo Agocs
            Reporter:
            tfm123 Ole
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              Dates

              Created:
              Updated:
              Resolved:

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