bool SetVideoMode( bool a_bLarge, bool a_bFullScreen, int a_iAdditionalFlags )

{

	// SET THE PARAMETERS FOR THE VIDEO MODE



	int iBpp = 16;		// Try the display's BPP first.

	if ( NULL != gamescreen )

	{

		iBpp = gamescreen->format->BitsPerPixel;

	}



	int iFlags = a_iAdditionalFlags;

	if ( a_bFullScreen )

	{

		iFlags |= SDL_FULLSCREEN;

	}



	// CALL SDL_SetVideoMode



	int iWidth = a_bLarge ? 800 : 640;

	int iHeight = a_bLarge ? 600 : 480;

//	if ( !a_bFullScreen ) iHeight = 480;



	gamescreen = SDL_SetVideoMode( iWidth, iHeight, iBpp, iFlags );

	if ( NULL == gamescreen ) 

	{

		debug( "SDL_SetVideoMode( %d, %d, %d, %d ) failed.\n", iWidth, iHeight, iBpp, iFlags );

		return false;

	}



	// IF THE DISPLAY IS 24BPP OR 8 BPP OR LESS, EMULATE 16 BPP INSTEAD

	// (because we are lazy and won't write 8bpp and 24bpp code anymore)



	if ( gamescreen->format->BytesPerPixel != 2

		&& gamescreen->format->BytesPerPixel != 4 )

	{

		gamescreen = SDL_SetVideoMode( iWidth, iHeight, 16, iFlags );

		if ( NULL == gamescreen )

		{

			debug( "SDL_SetVideoMode( %d, %d, %d, %d ) failed.\n", iWidth, iHeight, 16, iFlags );

			return false;

		}

	}

	

	return true;

}