private void Cleanup()
{
CleanupLayers();
CleanupPerformanceTracking();
CleanupDebugFont();
CleanupDebugRuler();
CleanupTiledTextureManager();
CleanupTextures();
CleanupShaders();
CleanupRenderRequiredFlag();
CleanupScreenCamera();
CleanupWorldCamera();
CleanupOpenGlBlendMode();
CleanupClearColor();
CleanupRender();
CleanupGraphicsContext();
}