Date: Mon, 19 Oct 1998 08:53:54 +0200
From: Alexander Bokovoy <bokovoy AT bspu DOT unibel DOT by>
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Organization: BSPU named after Maxim Tank
Message-ID: <14370.981019@bspu.unibel.by>
To: Ilya Ryzhenkov <djgpp AT delorie DOT com>
CC: djgpp AT delorie DOT com
Subject: Re[2]: MESA/OpenGL  used with DJGPP
References: <362A446C DOT FB3E9105 AT inetlab DOT com>
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Reply-To: djgpp AT delorie DOT com

Ilya wrote:

>> However, the Mesa package comes with DJ makefiles, so that tells me
>> it  can be done. I tried to compile the mesa libs, but got a lot of
>> errors such as these:
> It  compiled  well for me with slightly changed native makefiles and
> djgpp  v2.02  (gcc  2.8.1) except that include/mgl/mglver.h file was
> missed  from  the  package for some reason. However it seems that it
> doesn't  conatain  any  vital  information,  so it compiled. But was
> failed  to  work ;) The problem seems to be in pmode lib, which uses
> (seems  to)  incompatible  with djgpp usage of DPMI host. It doesn't
> use  native  djgpp  DPMI  funcs except one - enable near ptr - which
> itself  can  cause  problems  ...  Instead,  it  issues  direct 0x33
> interrupts and seems to be inaccurate.
I have used MGL 4.05 for my diploma work with DJGPP 2.01+GCC 2.8.1.
All library working good except some problems with bank's detection
under several video cards. As for Mesa/MGL, it works fine for me. I
have able to compile and run all tests for MESA - even Dolphin test
and Fractal Surface. There is no problem with PMode for DJGPP 2.01.
>> Has  anyone compiled this on DJ 2 , gcc 2.8.1 ? The errors mean, to
>> me, that either this DJGPP or Mesa version is incompatible with the
>> other.
> I'm  working  extensively  on  djgpp port of MGL (i use it as a test
> project  for  DLMs  http://www.iis.nsk.su/orangy/dlm/)  and  plan to
> contact  SciTech  Soft  to work in coord. If you wish to help, email
> me.  There  also  will separate hell with porting MGL to support not
> only  dos  host, but also windows host under djgpp with RSXNTDJ, but
> this is plans for far future.
I  have  already  contacted  with  MGL  author  (Kendall  Bennet)  and
described  him problems with DJGPP port known to me. He said that they
are  working  on  better  DJGPP  support.  In particular, MGL 4.1alpha
compiled  on  DJGPP  2.01+GCC  2.8.1  without  problems.  For the next
version of MGL it will be default behavior. But next version will have
different  internal  organization  and  many  new features such as TTF
support,  multilanguage  keyboard layouts, Linux version, multimonitor
support, etc, so probably you'll need to contact with Scitech Software
now  to avoid reinventing the wheel on the old version of library. MGL
4.1a  is  accessible  on  their  FTP  as /devel/beta/mgl41a1.zip. Also
/devel/beta  contains  inc.zip  which includes many useful headers and
implementation  of  PE DLL loading for any Intel-based 32bit operating
system   (it   includes  DOS  too),  and  dj20lib.zip  which  contains
precompiled MGL 4.1a for DJGPP 2.01+GCC 2.8.1.

Best regards,
Alexander Bokovoy, <bokovoy AT bspu DOT unibel DOT by>
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