void            SetDisplay(int i, int col, const Display& d);

template <const int COLOR>
class ColorDisplayTemplate : public Display
{
	virtual void Paint(Draw& w, const Rect& r, const Value& q,
			Color ink, Color paper, dword style) const
			{ StdDisplay().Paint(w, r, q, ink, Color::FromRaw(COLOR), style); }
};

const Display &RedDisplay() 	{ return Single< ColorDisplayTemplate<RGB(255, 0, 0)> >(); }
const Display &BlueDisplay() 	{ return Single< ColorDisplayTemplate<RGB(0, 0, 255)> >(); }
const Display &GreenDisplay() 	{ return Single< ColorDisplayTemplate<RGB(0, 255, 0)> >(); }