Dimension GetScreenSize() const override;

	void InputLoop() override;

	bool LockVideoBuffer() override;

	void UnlockVideoBuffer() override;

	void CheckPaletteAnim() override;

	/** Indicate to the driver the client-side might have changed. */

	void ClientSizeChanged(int w, int h, bool force);

	/** (Re-)create the backing store. */

	virtual bool AllocateBackingStore(int w, int h, bool force = false) = 0;

	/** Hand video buffer back to the painting backend. */

	virtual void ReleaseVideoPointer() = 0;

	/** Create the main window. */

	virtual bool CreateMainWindow(uint w, uint h, uint flags = 0);

private:

	void LoopOnce();

	void MainLoopCleanup();

	bool CreateMainSurface(uint w, uint h, bool resize);

	const char *Initialize();

#ifdef __EMSCRIPTEN__