ctrl.natt = NATIVE_ATTACHMENT_BACK_LEFT;
ctrl.preserve = (gsurf->base.SwapBehavior == EGL_BUFFER_PRESERVED);
ctrl.swap_interval = gsurf->base.SwapInterval;
ctrl.natt = NATIVE_ATTACHMENT_BACK_LEFT;
ctrl.preserve = (gsurf->base.SwapBehavior == EGL_BUFFER_PRESERVED);
ctrl.swap_interval = gsurf->base.SwapInterval;