Hi all,
About the recent discussion about trying to make a wrapper around OpenGL
that would forward calls to Direct3D, in a recent post I said I had
found info about SciTech's GLDirect, which was open sourced and
integrated into the Mesa code repository.
Well, recently Pat Wood (who is not a subscriber to this list but got
wind of my searching) sent along this info. (see below for the full message)
I think the GLDirect code is pretty much dead in the Mesa code
repository - it doesn't seem to be kept up to date and there are
probably some improvements that could be made to make it perform better.
I wonder if we could put together a working group of OSG users that
could take over the code, get it to work and update it so it could at
least give us an idea of what such a wrapper would look like and how it
would perform on modern machines and graphics cards.
Is there any interest in such a working group? I've never done driver
development myself (apart from a little thing that would control an ADC
and stepper motor through the parallel port back in the DOS days) but
I'd be happy to lend a hand if there's something I can help with. We'd
need some more knowledgeable people if we want this to take off.
Thoughts?
J-S
----- Forwarded message from Pat Wood <pat.w...@efi.com> -----
Date: Mon, 16 Mar 2009 16:34:39 -0700
From: Pat Wood <pat.w...@efi.com>
Reply-To: Pat Wood <pat.w...@efi.com>
Subject: Mesa and gldirect
To: "Jean-Sebastien Guay" <jean-sebastien.g...@cm-labs.com>
I've been playing around with the gldirect5 version of mesa
(essentially, the
code that SciTech released), which is integrated into mesa 6 (GL 1.1).
I saw
the dx7/8/9 directories in Mesa 7.3 and am thinking of taking on the task of
updating the gldirect code to work with it (I believe the gldirect code
hasn't
been updated for some time). This code might be very useful, since a lot of
non-nVidia OpenGL implementations have lots of problems, are old 1.2 or 1.3
APIs, or just don't work. In particular, we're using Ogre for one of our
products, and it doesn't play well with non-compliant GL implementations.
As for performance, it's about 2.5x slower than the native GL on my GeForce
8600GT, and almost the same speed as the native GL on my laptop with a
Mobility
Radeon 9000. Shaders are handled by translating GLSL to the DirectX 9
shader
language HLSL.
If you have any other questions, feel free to email me. I'm not a
member on the
OpenSceneGraph Forum.
Pat
----- End forwarded message -----
--
______________________________________________________
Jean-Sebastien Guay jean-sebastien.g...@cm-labs.com
http://www.cm-labs.com/
http://whitestar02.webhop.org/
--
______________________________________________________
Jean-Sebastien Guay jean-sebastien.g...@cm-labs.com
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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