#ifndef SG_SCREEN
#define SG_SCREEN

#include <ostream>
#include <string>

typedef unsigned int mm;

class Screen {
public:
	virtual ~Screen();

	mm getHeight() const;
	mm getWidth() const;

	friend std::ostream& operator<<(std::ostream& ostr, const Screen& screen);

protected:
	mm width;
	mm height;

	Screen(mm width, mm height);
	virtual std::string extraOutput() const = 0;
};

std::ostream& operator<<(std::ostream& ostr, const Screen& screen);

#endif /* SG_SCREEN */