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-bool fgOSIsMainCamera(const osg::Camera* camera);
-bool fgOSIsMainContext(const osg::GraphicsContext* context);
-
-/** Get graphics context of the main camera. This is the principal
- * window in multi-window configurations, or the only window in an
- * embedded configuration. The GUI will be added to this context.
- */
-osg::GraphicsContext* fgOSGetMainContext();
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