Re: OpenGL/MesaGL -> TosGL?

From: Jo Even Skarstein <>
Date: Thu, 23 Jul 1998 16:48:02 +0200 (CEST)

On Thu, 23 Jul 1998, Rodolphe Pineau wrote:

> >But yes, the OpenGL device context should support offscreen rendering, and
> >normal
> >window rendering - through VDI if required. But it would definitely benefit
> >from some
> >optimisation work using non-vdi calls, for the sake of fast realtime
> >applications.
> Yes but if you don't use VDI calls you've got to make a version for each
> diferent video card you could found on atari computer. May be these
> optimisation could be donne directly in VDI (ie in Fenix for example).

What about this: MesaGL renders to VDI-compatible device-dependant
offscreen bitmaps (phew!), and VDI blits it to screen? If you use
vq_scrn-something you can inquire the screen-layout, so it should be
possible to support all graphics-card. Remember that there's a lot of
potential users that has Mach64, S3, ET4000/6000 etc. This method would
also make it easy to use GL in GEM-applications :-)

Btw. I partially ported SRGP and SPHIGS to VDI. It worked, sortof, but
after having spent a couple of months with it I realised that SPHIGS
itself is pretty unusable... The speed was acceptable though.

** Jo Even Skarstein
** beer - maria mckee - atari falcon - babylon 5
Received on to. juli 23 1998 - 21:57:00 CEST

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