1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
Mesa 5.0 DOS/DJGPP Port v1.3
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Description:
~~~~~~~~~~~~
Well, guess what... this is the DOS port of Mesa 5.0, 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 = k6
BIG_OPT=1 crazy optimizations; not very useful, though...
default = no
SGI_GLU=1 build SGI's GLU instead of Mesa's.
default = no
GLIDE absolute path to Glide library; used with FX.
default = $(TOP)/include/glide3
FX=1 build for 3dfx Glide3; use it if you have the Glide
SDK (designed for your platform), and, of course, a
3dfx card... Note that this disables compilation of
actual DMesa code, as Glide does all the stuff!
default = no
HAVE_X86=1 optimize for i386.
default = no
HAVE_MMX=1 MMX instructions; use only if you assembler/compiler
supports MMX instruction set; backwards compatibility
with older processors is still preserved.
default = no
HAVE_SSE=1 (see HAVE_MMX)
default = no
HAVE_3DNOW=1 (see HAVE_MMX)
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: K6-2 (CXT) @500(412.5) MHz
Mainboard: ViA Apollo VP2/97 w/ 128 MB SDRAM
Video card: PowerColor EvilKing3 (Voodoo3 3000 PCI) w/ 16 MB SDRAM
DJGPP: djdev 2.04 + gcc v3.2 + make v3.79.1
OS: DOS and Win9x
FAQ:
~~~~
1. Compilation
Q) I tried to run `make' and it exits because `gcc' complains it cannot find
some stupid file.
A) You need LFN support.
A) When compiling for Glide (FX=1), pay attention to Glide path.
2. Dynamic modules
Q) What are you mumbling about dynamic modules?
A) You must have the DXE3 package (available on my site) installed in order
to build the dynamic modules.
Q) DXE3 modules give me headaches...
A) The DXE3 modules are not compulsory. The static libraries are still built
and you can use them in the old-fashioned, classic way... and learn to
live with your huge executable size. For example:
gcc -o OUT.exe IN.c -lglut -lglu -lgl
Q) Okay, DXE3 modules are built. How can I use them?
A) Build your export object file; then link it with your application.
For example:
dxe3res -o dmesadxe.c gl.dxe glu.dxe glut.dxe
gcc -o dmesadxe.o -c -fno-builtin dmesadxe.c
gcc -o OUT.exe dmesadxe.o IN.c -liglut -liglu -ligl -ldl
3. Using Mesa for DJGPP
Q) DMesa is so SLOOOW! The Win32 OpenGL performs so much better...
A) Is that a question? If you have a Voodoo3/Banshee card, you're lucky. The
Glide port is on my web page. If you haven't, sorry; everything is done
in software. Suggestions?
Q) I made a simple application and it does nothing. It exits right away. Not
even a blank screen.
A) Single-buffered is not allowed at all. Until I can find a way to use
*REAL* hardware acceleration, it won't get implemented.
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) My demo doesn't display text. I know I used the glut font routines!
A) Then you probably use GLUT as a DXE. Well, there is no direct access to
variables due to the way DXE works. Read the documentation. The author of
GLUT took this into account for _WIN32 DLL's only; I don't want to modify
his headers. The only workaround is to link GLUT the old way :-(
Q) I tried to set refresh rate w/ DMesa, but without success.
A) Refresh rate control works only for VESA 3.0. If you were compiling for
Glide, see Glide info. If not, sorry!
Q) The GLUT is incomplete.
A) See below.
libGLUT (the toolkit):
~~~~~~~~~~~~~~~~~~~~~~
Well, this "skeletal" GLUT implementation is not mine. 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.
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 positioning, drawing, etc), but
is enough to make almost all the demos work.
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: 640x480x16 at (0,0), 8-bit stencil, 16-bit accum.
However, the video mode is chosen in such a way that first window will fit. If
you need high resolution with small windows, try to place them far to the right
(or way down).
The following environment variables can customize GLUT behaviour:
DMESA_GLUT_REFRESH - set vertical screen refresh rate
DMESA_GLUT_BPP - set default bits per pixel
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 (dec-2002)
+ enabled OpenGL 1.4 support
+ added MMX clear/blit routines
+ enabled SGI's GLU compilation
+ added color-index modes
+ added 8bit FakeColor (thanks to Neil Funk)
+ added VGA support (to keep Ben Decker happy)
* fixed GLUT compilation error (reported by Chan Kar Heng)
* overhauled virtual buffer and internal video drivers
* better fxMesa integration
* extended GLUT functionality
* switched to DXE3
Contact:
~~~~~~~~
Name: Borca Daniel
E-mail: dborca@yahoo.com
WWW: http://www.geocities.com/dborca/
|
