Emmanuele Bassi 0cbfabcda4 stage: Add the NO_CLEAR_ON_PAINT hint ... Some apps or some use cases don't need to clear the stage on immediate rendering GPUs. A media player playing a fullscreen video or a tile-based game, for instance. These apps are redrawing the whole screen, so we can avoid clearing the color buffer when preparing to paint the stage, since there is no blending with the stage color being performed. We can add an private set of hints to ClutterStage, and expose accessors for each potential hint; the first hint is the 'no-clear' one. http://bugzilla.clutter-project.org/show_bug.cgi?id=2058		2010-07-13 14:57:48 +01:00
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