void (SDLCALL *SDL_CloseAudio)();

	int (SDLCALL *SDL_LockSurface)(SDL_Surface*);

	void (SDLCALL *SDL_UnlockSurface)(SDL_Surface*);

	SDLMod (SDLCALL *SDL_GetModState)();

	void (SDLCALL *SDL_Delay)(Uint32);

	void (SDLCALL *SDL_Quit)();

	void (SDLCALL *SDL_EnableUNICODE)(int);

	void (SDLCALL *SDL_VideoDriverName)(char *, int);

	SDL_Rect **(SDLCALL *SDL_ListModes)(void *, int);

	Uint8 *(SDLCALL *SDL_GetKeyState)(int *);

} SDLProcs;

	M("")

;

#undef M

static SDLProcs _proc;

{

	if (_proc.SDL_Init != NULL)

		return NULL;

	if (!LoadLibraryList((void**)&_proc, sdl_files))

		return "Unable to load sdl.dll";

	return NULL;

#endif

static char *SdlOpen(uint32 x)

{

#if defined(DYNAMICALLY_LOADED_SDL) && defined(WIN32)

#endif

	if (_sdl_usage++ == 0) {

		if (SDL_CALL SDL_Init(x) == -1)

			return SDL_CALL SDL_GetError();

		if (SDL_CALL SDL_InitSubSystem(x) == -1)

			return SDL_CALL SDL_GetError();

	}

#ifdef UNIX

	signal(SIGABRT, SdlAbort);

	return NULL;

}

static void SdlClose(uint32 x)

{

		SDL_CALL SDL_QuitSubSystem(x);

	if (--_sdl_usage == 0) {

		SDL_CALL SDL_Quit();

	}

}

static void SdlVideoMakeDirty(int left, int top, int width, int height)

{

//	printf("(%d,%d)-(%d,%d)\n", left, top, width, height);

	}

	_num_dirty_rects++;

}

static SDL_Color pal[256];

	uint i;

	byte *b;

		pal[i].r = b[0];

		pal[i].g = b[1];

		pal[i].b = b[2];

		pal[i].unused = b[3];

	}

	SDL_CALL SDL_SetColors(_sdl_screen, pal, start, end);

}

	UpdatePalette(0, 256);

}

{

	if(_pal_last_dirty != -1) {

		UpdatePalette(_pal_first_dirty, _pal_last_dirty + 1);

		_pal_last_dirty = -1;

	}

}

{

		_num_dirty_rects = 0;

		if (n > MAX_DIRTY_RECTS)

			SDL_CALL SDL_UpdateRect(_sdl_screen, 0, 0, 0, 0);

			SDL_CALL SDL_UpdateRects(_sdl_screen, n, _dirty_rects);

	}

}

static int CDECL compare_res(const void *pa, const void *pb)

{

	int x = ((const uint16*)pa)[0] - ((const uint16*)pb)[0];

	return ((const uint16*)pa)[1] - ((const uint16*)pb)[1];

}

static const uint16 default_resolutions[][2] = {

};

	int i;

	SDL_Rect **modes;

	modes = SDL_CALL SDL_ListModes(NULL, SDL_SWSURFACE + (_fullscreen ? SDL_FULLSCREEN : 0));

		error("sdl: no modes available");

	_all_modes = (modes == (void*)-1);

	if (_all_modes) {

		// all modes available, put some default ones here

		memcpy(_resolutions, default_resolutions, sizeof(default_resolutions));

		_num_resolutions = lengthof(default_resolutions);

	} else {

		int n = 0;

			int w = modes[i]->w;

			int h = modes[i]->h;

			if (IS_INT_INSIDE(w, 640, MAX_SCREEN_WIDTH + 1) &&

					IS_INT_INSIDE(h, 480, MAX_SCREEN_HEIGHT + 1)) {

				int j;

				for (j = 0; j < n; ++j)

		uint newdelta = abs((_resolutions[i][0] - *w) * (_resolutions[i][1] - *h));

		if (newdelta < delta) {

			best = i;

			delta = newdelta;

		}

	}

	*w = _resolutions[best][0];

	*h = _resolutions[best][1];

	return 2;

}

static bool CreateMainSurface(int w, int h)

	GetAvailableVideoMode(&w, &h);

	DEBUG(misc, 0) ("sdl: using mode %dx%d", w, h);

	// DO NOT CHANGE TO HWSURFACE, IT DOES NOT WORK

		return false;

	_screen.width = newscreen->w;

	_screen.height = newscreen->h;

	_screen.pitch = newscreen->pitch;

	GameSizeChanged();

	return true;

}

	uint16 vk_from;

	byte vk_count;

	byte map_to;

} VkMapping;

static const VkMapping _vk_mapping[] = {

	// Pageup stuff + up/down

	AS(SDLK_UP,			WKC_UP),

	AS(SDLK_DOWN,		WKC_DOWN),

	AS(SDLK_LEFT,		WKC_LEFT),

	AS(SDLK_RIGHT,	WKC_RIGHT),

	AS(SDLK_HOME,		WKC_HOME),

	AS(SDLK_END,		WKC_END),

	AS(SDLK_INSERT,	WKC_INSERT),

	AS(SDLK_DELETE,	WKC_DELETE),

	// Map letters & digits

	AS(SDLK_ESCAPE,	WKC_ESC),

	AS(SDLK_BACKSPACE,	WKC_BACKSPACE),

	AS(SDLK_SPACE,		WKC_SPACE),

	AS(SDLK_RETURN,		WKC_RETURN),

	AS(SDLK_TAB,			WKC_TAB),

	// Function keys

	// Numeric part.

	// What is the virtual keycode for numeric enter??

	AS(SDLK_KP_DIVIDE,		WKC_NUM_DIV),

	AS(SDLK_KP_MULTIPLY,	WKC_NUM_MUL),

	AS(SDLK_KP_MINUS,			WKC_NUM_MINUS),

	AS(SDLK_KP_PLUS,			WKC_NUM_PLUS),

	AS(SDLK_KP_ENTER,			WKC_NUM_ENTER),

};

static uint32 ConvertSdlKeyIntoMy(SDL_keysym *sym)

{

			break;

		}

	}

	// check scancode for BACKQUOTE key, because we want the key left of "1", not anything else (on non-US keyboards)

#if defined(WIN32)

	if (sym->scancode == 41) key |= WKC_BACKQUOTE;

#else

#endif

	// META are the command keys on mac

	if (sym->mod & KMOD_META) key |= WKC_META;

	if (sym->mod & KMOD_SHIFT) key |= WKC_SHIFT;

	if (sym->mod & KMOD_CTRL) key |= WKC_CTRL;

	if (sym->mod & KMOD_ALT) key |= WKC_ALT;

	//printf("scancode character pressed %d\n", sym->scancode);

	//printf("unicode character pressed %d\n", sym->unicode);

	return (key << 16) + sym->unicode;

}

	SDL_Event ev;

	if (!SDL_CALL SDL_PollEvent(&ev))

		return -2;

	case SDL_MOUSEMOTION:

		if (_cursor.fix_at) {

			int dx = ev.motion.x - _cursor.pos.x;

			int dy = ev.motion.y - _cursor.pos.y;

			if (dx != 0 || dy != 0) {

				_cursor.delta.x += dx;

		break;

	case SDL_MOUSEBUTTONDOWN:

		if (_rightclick_emulate && (SDL_CALL SDL_GetModState() & (KMOD_LCTRL | KMOD_RCTRL)))

			ev.button.button = SDL_BUTTON_RIGHT;

#if !defined(WIN32)

		}

		break;

	case SDL_MOUSEBUTTONUP:

		if (_rightclick_emulate) {

			_right_button_down = false;

			_left_button_down = false;

			_right_button_down = false;

		}

		break;

	case SDL_QUIT:

		// do not ask to quit on the main screen

			AskExitGame();

		else

			return ML_QUIT;

		break;

	case SDL_KEYDOWN:

			_fullscreen ^= true;

			GetVideoModes();

			CreateMainSurface(_screen.width, _screen.height);

			MarkWholeScreenDirty();

		} else {

			_pressed_key = ConvertSdlKeyIntoMy(&ev.key.keysym);

		}

		break;

	case SDL_VIDEORESIZE: {

	}

	return -1;

}

static const char *SdlVideoStart(char **parm)

{

	SDL_CALL SDL_VideoDriverName(buf, 30);

	DEBUG(misc, 0) ("sdl: using driver '%s'", buf);

	GetVideoModes();

	CreateMainSurface(_cur_resolution[0], _cur_resolution[1]);

	SDL_CALL SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);

	SDL_CALL SDL_EnableUNICODE(1);

	return NULL;

}

{

	SdlClose(SDL_INIT_VIDEO);

}

{

	int i;

	uint32 mod;

	int numkeys;

	Uint8 *keys;

		InteractiveRandom(); // randomness

		if (_exit_game)	return ML_QUIT;

		mod = SDL_CALL SDL_GetModState();

		keys = SDL_CALL SDL_GetKeyState(&numkeys);

#if defined(_DEBUG)

#else

#endif

			if (!_networking) _fast_forward |= 2;

			_fast_forward = 0;

		}

		if ((_fast_forward && !_pause) || cur_ticks > next_tick)

			next_tick = cur_ticks;

		if (cur_ticks == next_tick) {

			next_tick += 30;

			_ctrl_pressed = !!(mod & (KMOD_LCTRL | KMOD_RCTRL));

			_shift_pressed = !!(mod & (KMOD_LSHIFT | KMOD_RSHIFT));

			_dbg_screen_rect = !!(mod & KMOD_CAPS);

			// determine which directional keys are down

			_dirkeys =

			GameLoop();

			_screen.dst_ptr = _sdl_screen->pixels;

			UpdateWindows();

			}

 			DrawSurfaceToScreen();

		} else {

			SDL_CALL SDL_Delay(1);

			_screen.dst_ptr = _sdl_screen->pixels;

			DrawMouseCursor();

	SdlVideoMainLoop,

	SdlVideoChangeRes,

};

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

{

}

static char *SdlSoundStart(char **parm)

{

	SDL_AudioSpec spec;

	spec.freq = GetDriverParamInt(parm, "hz", 11025);

	spec.format = AUDIO_S16SYS;

	spec.channels = 2;

	spec.samples = 512;

	SDL_CALL SDL_OpenAudio(&spec, &spec);

	SDL_CALL SDL_PauseAudio(0);

	return NULL;

}

{

	SDL_CALL SDL_CloseAudio();

	SdlClose(SDL_INIT_AUDIO);

}

const HalSoundDriver _sdl_sound_driver = {

	SdlSoundStart,

	SdlSoundStop,

};

#include "viewport.h"

void redsq_debug(int tile)

{

	_thd.redsq = tile;

	MarkWholeScreenDirty();

	_screen.dst_ptr = _sdl_screen->pixels;

static void DbgRedraw()

{

	SdlVideoMakeDirty(0,0,_screen.width,_screen.height);

	DrawSurfaceToScreen();

}

#endif // WITH_SDL