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Lionel Landwerlin authored
If we call _clutter_stage_do_update() on a ClutterStage that isn't mapped/visible, no GL command will be queued, and the Mesa/DRI2 implementation of SwapBuffers will do nothing. This causes GLX_INTEL_swap_event to not be emitted by the X server because no swapping has been requested through DRI2 and it eventually leads to a deadlock situation in ClutterStageCogl because we're waiting for an event before we start the next draw cycle. This patch removes the non mapped stages from the list of stages to process. This is consistent with a previous patch for the ClutterMasterClockGdk [1]. [1] : 5733ad58 https://bugzilla.gnome.org/show_bug.cgi?id=755014
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