This is a quick hack of Quake ported to the Simple DirectMedia Layer library.
http://www.devolution.com/~slouken/SDL/

To build under Linux, simply run ./configure; make

This game requires the original Quake datafiles.  You can get the shareware
data files from http://www.idsoftware.com/.

Of interest in the original X sources is the following:
	// Duff's Device
	count = width;
	n = (count + 7) / 8;
	dest = ((PIXEL16 *)src) + x+width - 1;
	src += x+width - 1;

	switch (count % 8) {
	case 0:	do {	*dest-- = st2d_8to16table[*src--];
	case 7:		*dest-- = st2d_8to16table[*src--];
	case 6:		*dest-- = st2d_8to16table[*src--];
	case 5:		*dest-- = st2d_8to16table[*src--];
	case 4:		*dest-- = st2d_8to16table[*src--];
	case 3:		*dest-- = st2d_8to16table[*src--];
	case 2:		*dest-- = st2d_8to16table[*src--];
	case 1:		*dest-- = st2d_8to16table[*src--];
		} while (--n > 0);
	}
This idea may make it into the SDL blitters if it turns out to be faster
than my current code. :)

Thanks to Zoid, Dave Taylor, John Carmack, and everyone else involved in the
open source release of id games. :)

- Sam Lantinga (slouken@devolution.com) 12/25/1999