#pragma once

/******************************************************************************
	KDirectDrawOverlay exposes a Direct Draw overlay facility.
******************************************************************************/


class KDirectDrawOverlay : public KDirectDraw
{
protected:

#ifdef KDEBUG
	KException::KDxException e_dx;
#endif

	KOverlaySurface m_overlay;	
	KOverlaySurface m_backbuffer;

	HWND m_hWnd, m_hTop;
	bool m_full_screen, m_mode_changed;
	DWORD m_w, m_h, m_bpp;
	DDCAPS m_ddcaps;
	int m_buf_count;
	TCHAR * m_bmp_file_name;

	BITMAPINFO * m_dib;

	HRESULT Discharge();

public:

	KDirectDrawOverlay();
	~KDirectDrawOverlay();
	HRESULT SetupDirectDraw(HWND hTop, HWND hWnd, const TCHAR * bmp_file, 
							int buf_count=0, bool full_screen = false, int w=0, int h=0, int bpp=0);
	void Init(HWND hTop, HWND hWnd, bool full_screen, DWORD w, DWORD h, DWORD bpp);
	bool TestStateAndRecover(void);
	void LoadBitmap(const TCHAR * file_name);
	void ReLoadBitmap(void);
	void GetDisplayMode(DWORD& w, DWORD& h, DWORD& bpp);
};