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  1. Qt
  2. QTBUG-46415

qquickviewcomparison example crashes when using EGL and Mesa (Intel)

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P1: Critical P1: Critical
    • 5.5.0 RC
    • 5.5.0 Beta
    • Quick: Widget
    • None

      We are using surfaceless contexts for QOffscreenSurface on EGL , when available (new in 5.5), and so calling OpenGL functions relying on the draw/read framebuffer with FBO 0 bound is undefined behavior. (in case of Mesa glViewport is apparently such a function, at least when running on Intel)

      This means anything using text rendering in a QQuickWidget may potentially crash when using EGL, depending on the drivers.

        For Gerrit Dashboard: QTBUG-46415
        # Subject Branch Project Status CR V
        113463,5 Fix incorrect FBO bindings with QQuickWidget 5.5 qt/qtdeclarative Status: ABANDONED 0 0
        113475,3 Redirect the default FBO correctly with QQuickWidget 5.5.0 qt/qtdeclarative Status: MERGED +2 0

            lagocs Laszlo Agocs
            lagocs Laszlo Agocs
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