Returns plot, renderer and format for single frame export.

def single_frame_plot(obj):
    """
    Returns plot, renderer and format for single frame export.
    """
    obj = Layout.from_values(obj) if isinstance(obj, AdjointLayout) else obj

    backend = Store.current_backend
    renderer = Store.renderers[backend]

    plot_cls = renderer.plotting_class(obj)
    plot = plot_cls(obj, **renderer.plot_options(obj, renderer.size))
    fmt = renderer.params('fig').objects[0] if renderer.fig == 'auto' else renderer.fig
    return plot, renderer, fmt