Re-add mesa-6.4.1 which was accidentally deleted

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+			Mesa 6.3 DOS/DJGPP Port v1.7
+			~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+
+Description:
+~~~~~~~~~~~~
+
+Well, guess what... this is the DOS port of Mesa 6.3, for DJGPP fans... Whoa!
+The driver has its origins in ddsample.c, written by Brian Paul and found by me
+in Mesa 3.4.2.
+
+
+
+Legal:
+~~~~~~
+
+Mesa copyright applies, provided this package is used within Mesa. For anything
+else, see GPL.
+
+
+
+Installation:
+~~~~~~~~~~~~~
+
+Unzip and type:
+
+	make -f Makefile.DJ [OPTIONS...]
+
+Available options:
+
+     Environment variables:
+	CPU		optimize for the given processor.
+			default = pentium
+	GLU=[mesa|sgi]	specify GLU directory; can be `sgi' (requires GNU/C++)
+			or `mesa'.
+			default = mesa
+	GLIDE		path to Glide3 SDK; used with FX.
+			default = $(TOP)/glide3
+	FX=1		build for 3dfx Glide3. Note that this disables
+			compilation of most DMesa code and requires fxMesa.
+			As a consequence, you'll need the DJGPP Glide3
+			library to build any application.
+			default = no
+	X86=1		optimize for x86 (if possible, use MMX, SSE, 3DNow).
+			default = no
+
+     Targets:
+	all:		build everything
+	libgl:		build GL
+	libglu:		build GLU
+	libglut:	build GLUT
+	clean:		remove object files
+	realclean:	remove all generated files
+
+
+
+Tested on:
+	CPU:		AMD Athlon XP 1800+
+	Mainboard:	GA-7VTXE w/ 512 MB DDRAM
+	Video card:	Voodoo5 6000 AGP w/ 128 MB SDRAM
+	DJGPP:		djdev 2.04 + gcc v3.4.3 + make v3.80
+	OS:		DOS and Win98SE
+
+
+
+FAQ:
+~~~~
+
+1. Compilation
+
+   Q) `make' barfs and exits because it cannot find some stupid file.
+   A) You need LFN support.
+   A) When compiling for Glide (FX=1), pay attention to Glide path.
+
+   Q) Libraries built OK, but linker complains about `vsnprintf' every time I
+      compile some demo.
+   A) Upgrade to DJGPP 2.04.
+   A) Add `vsnprintf.c' to the CORE_SOURCES in `src/Makefile.DJ' (untested!).
+   A) Patch `src/mesa/main/imports.c' with the following line:
+	#define vsnprintf(buf, max, fmt, arg) vsprintf(buf, fmt, arg)
+      This hack should be safe in 90% of the cases, but if anything goes wrong,
+      don't come back to me crying.
+
+   Q) `make' complains about DXE3 or something, yet it builds the libraries.
+   A) DXE3 refers to the DJGPP dynamic modules. You'll need either the latest
+      DJGPP distro, or download the separate package from my web page. Read the
+      DXE3 documentation on how to use them.
+   A) When compiling for Glide (FX=1), make sure `glide3x.dxe' can be found in
+      LD_LIBRARY_PATH (or top `lib' directory).
+
+2. Using Mesa for DJGPP
+
+   Q) Every test I tried crashes badly.
+   A) If you have compiled with SSE and you're running under plain DOS, you
+      have to disable SSE at run-time. See environment variables below.
+
+   Q) DMesa is so SLOOOW! The Win32 OpenGL performs so much better...
+   A) Is that a question? If you have a 3dfx Voodoo (any model), you're
+      lucky (check http://sourceforge.net/projects/glide for the DJGPP port).
+      If you haven't, sorry; everything is done in software. Suggestions?
+
+   Q) I tried to set refresh rate w/ DMesa, but without success.
+   A) Refresh rate control works only for VESA 3.0 and the 3dfx driver (in
+      which case FX_GLIDE_REFRESH will be overwritten if it is defined and
+      is not 0).
+
+   Q) I made a simple application and it does nothing. It exits right away. Not
+      even a blank screen.
+   A) Pure software drivers (VESA/VGA/NUL) support only double-buffered modes.
+   A) Another weird "feature" is that buffer width must be multiple of 8 (I'm a
+      lazy programmer and I found that the easiest way to keep buffer handling
+      at peak performance ;-).
+
+   Q) I'm getting a "bad font!" fatal error.
+   A) Always use GLUT_STROKE_* and GLUT_BITMAP_* constants when dealing with
+      GLUT fonts. If you're using `glut.dxe', then make sure GLUT_STROKE_* and
+      GLUT_BITMAP_* are mapped to integer constants, not to the actual font
+      address (same mechanism used for Win32 _DLL).
+
+   Q) What is NUL driver good for, if I don't get any output at all?
+   A) For debugging. The NUL driver is very much like OSMesa. Everything is
+      done just the same as VESA/VGA drivers, only it doesn't touch your video
+      hardware. You can query the actual buffer by issuing:
+	DMesaGetIntegerv(DMESA_GET_BUFFER_ADDR, &buffer);
+      and dump it to a file.
+
+   Q) How do I query for a list of available video modes to choose as a visual?
+   A) This is an ugly hack, for which I'm sure I'll burn in hell.
+      First, query for a list of modes:
+	n = DMesaGetIntegerv(DMESA_GET_VIDEO_MODES, NULL);
+      If `n' is strictly positive, you allocate an array of pointers to a given
+      struct (which is guaranteed to be extended only - not changed in future):
+	struct {
+		int xres, yres;
+		int bpp;
+	} **l = malloc(n * sizeof(void *));
+      Now pass the newly allocated buffer to fill in:
+	DMesaGetIntegerv(DMESA_GET_VIDEO_MODES, (GLint *)l);
+      And collect the info:
+	for (i = 0; i < n; i++) {
+	    printf("%dx%d:%d\n", l[i]->xres, l[i]->yres, l[i]->bpp);
+	}
+
+   Q) The GLUT is incomplete.
+   A) See below.
+
+
+
+libGLUT (the toolkit):
+~~~~~~~~~~~~~~~~~~~~~~
+
+Well, this "skeletal" GLUT implementation was taken from AllegGL project and
+heavily changed. Thanks should go to Bernhard Tschirren, Mark Kilgard, Brian
+Paul and probably others (or probably not ;-). GLUT functionality will be
+extended only on an "as needed" basis.
+
+GLUT talks to hardware via PC_HW package which was put together from various
+pieces I wrote long time ago. It consists from the keyboard, mouse and timer
+drivers.
+
+My keyboard driver used only scancodes; as GLUT requires ASCII values for keys,
+I borrowed the translation tables (and maybe more) from Allegro -- many thanks
+to Shawn Hargreaves et co. Ctrl-Alt-Del (plus Ctrl-Alt-End, for Windows users)
+will shut down the GLUT engine unconditionally: it will raise SIGINT, which in
+turn will (hopefully) call the destructors, thus cleaning up your/my mess ;-)
+NB: since the DJGPP guys ensured signal handlers won't go beyond program's
+space (and since dynamic modules shall) the SIGINT can't be hooked (well, it
+can, but it is useless), therefore you must live with the 'Exiting due to
+signal SIGINT' message...
+
+The mouse driver is far from complete (lack of drawing, etc), but is enough to
+make almost all the demos work. Supports the CuteMouse WheelAPI.
+
+The timer is pretty versatile for it supports multiple timers with different
+frequencies. While not being the most accurate timer in the known universe, I
+think it's OK. Take this example: you have timer A with a very high rate, and
+then you have timer B with very low rate compared to A; now, A ticks OK, but
+timer B will probably loose precision!
+
+As an addition, stdout and stderr are redirected and dumped upon exit. This
+means that `printf' can be safely called during graphics. A bit of a hack, I
+know, because all messages come in bulk, but I think it's better than nothing.
+"Borrowed" from LIBRHUTI (Robert Hoehne).
+
+Window creating defaults: (0, 0, 300, 300), 16bpp. However, the video mode is
+chosen in such a way that first window will fit. If you need high resolution
+with small windows, set initial position far to the right (or way down); then
+you can move them back to any position right before the main loop.
+
+
+
+Environment variables:
+~~~~~~~~~~~~~~~~~~~~~~
+	DMESA_NULDRV		- (any value) force NUL driver
+	GLUT_FPS		- print frames/second statistics to stderr
+	MESA_NO_SSE		- (any value) safe option under pure DOS
+	DMESA_GLUT_REFRESH	- set vertical screen refresh rate (VESA3)
+	DMESA_GLUT_BPP		- set default bits per pixel (VGA needs 8)
+	DMESA_GLUT_ALPHA	- set default alpha bits (8)
+	DMESA_GLUT_DEPTH	- set default depth bits (16)
+	DMESA_GLUT_STENCIL	- set default stencil bits (8)
+	DMESA_GLUT_ACCUM	- set default accum bits (16)
+
+
+
+History:
+~~~~~~~~
+
+v1.0 (mar-2002)
+	initial release
+
+v1.1 (sep-2002)
+	+ added 3dfx Glide3 support
+	+ added refresh rate control
+	+ added fonts in GLUT
+	* lots of minor changes
+
+v1.2 (nov-2002)
+	* synced w/ Mesa-4.1
+	- removed dmesadxe.h
+
+v1.3 (mar-2003)
+	+ enabled OpenGL 1.4 support
+	+ added MMX clear/blit routines
+	+ enabled SGI's GLU compilation
+	+ added samples makefile
+	+ added new GLUT functions
+	+ added color-index modes
+	+ added Matrox Millennium MGA2064W driver
+	+ added 8bit FakeColor (thanks to Neil Funk)
+	+ added VGA support (to keep Ben Decker happy)
+	! fixed some compilation errors (reported by Chan Kar Heng)
+	* optimized driver for faster callback access... yeah, right :)
+	* overhauled virtual buffer and internal video drivers
+	* better fxMesa integration
+	* revamped GLUT
+	* switched to DXE3
+
+v1.4 (dec-2003)
+	+ enabled GLUT fonts with DXE
+	+ truly added multi-window support in GLUT (for Adrian Woodward)
+	* accomodated makefiles with the new sourcetree
+	* fixed some ALPHA issues
+	* minor changes to PC_HW/timer interface
+	x hacked and slashed the 3dfx driver (w/ help from Hiroshi Morii)
+
+v1.5 (jan-2004)
+	+ added interface to query available "visuals" (GLFW - Marcus Geelnard)
+	+ added GLUT timer callback
+	- removed Matrox Millennium MGA2064W driver
+	x more changes to the 3dfx driver
+
+v1.6 (aug-2004)
+	+ implemented NUL driver
+	+ added DMesaGetProcAddress and glutGetProcAddress
+	* reorganized fxMesa wrapper to handle multiple contexts
+	! fixed a horrible bug in VGA initialization routine
+	! fixed partial clears
+
+v1.7 (???-2005)
+	+ enabled OpenGL 2.0 support
+	+ added support for sw texture compression
+	+ added FreeGLUT specific functions
+	* no more GLX sources in DOS GLUT
+	* made GLUT timer callbacks less accurate but safer
+
+
+
+Contact:
+~~~~~~~~
+
+Name:   Daniel Borca
+E-mail: [email protected]
+WWW:    http://www.geocities.com/dborca/