DrawSurfaceToScreen();

		} else {

			SDL_CALL SDL_Delay(1);

			_screen.dst_ptr = _sdl_screen->pixels;

			DrawTextMessage();

			DrawMouseCursor();

			DrawSurfaceToScreen();

		}

	}

}

static bool SdlVideoChangeRes(int w, int h)

{

	/* See if the mode is available. Ignore return value

	 * since we will get back a valid resolution anyways. Either exactly

	 * the same one, or one clamped to the closest available one */

	GetAvailableVideoMode(&w, &h);

	CreateMainSurface(w, h);

	return true;

}

void ToggleFullScreen(bool full_screen)

{

	GetVideoModes(); // get the list of available video modes

	if (!_video_driver->change_resolution(_cur_resolution[0], _cur_resolution[1]))

		_fullscreen ^= true; // switching resolution failed, put back full_screen to original status

}

const HalVideoDriver _sdl_video_driver = {

	SdlVideoStart,

	SdlVideoStop,

	SdlVideoMakeDirty,

	SdlVideoMainLoop,

	SdlVideoChangeRes,

};

static void CDECL fill_sound_buffer(void *userdata, Uint8 *stream, int len)

{

	MxMixSamples(_mixer, stream, len / 4);

}

static const char *SdlSoundStart(const char * const *parm)

{

	SDL_AudioSpec spec;

	const char *s = SdlOpen(SDL_INIT_AUDIO);

	if (s != NULL) return s;