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7f6bcea331
Emit a signal so that interested parties can recreate their FBOs and queue a full scene graph redraw to ensure we don't end up showing graphical artifacts. This relies on the GL driver supporting the NV_robustness_video_memory_purge extension and cogl creating a suitable GL context. For now we only make use of it with the X backend since the only driver with which this is useful is NVIDIA. https://bugzilla.gnome.org/show_bug.cgi?id=739178