[visionegg] Re: 10-bit framebuffers

  • From: Andrew Straw <astraw@xxxxxxxxxxx>
  • To: visionegg@xxxxxxxxxxxxx
  • Date: Tue, 10 Aug 2004 00:25:08 -0700

Dear Martin,

I keep my fingers optimistically crossed that 10-bit framebuffers are available in a consumer-level card. If it works, it should simply be a matter of typing "32 10 10 10 0" for the total preferred bit depth and the number of R G B and A bits per pixel in the Vision Egg initial GUI screen.

Let us know how it turns out!

Cheers!
Andrew

Martin Spacek wrote:

Hi Andrew,

Well, I got this not-so-useful reply from ATI:



Regarding 10-bit frame buffer support.

The RADEON 9800 products all offer 10-bit frame buffer support. In


regards >to developing with OpenGL you can refer to the Developer
Relations >department. Please visit their portion of the ATI website at


http://www.ati.com/developer/index.html


Regards,

Kyra Plouffe
Customer Care
ATI Technologies, Inc.
http://www.ati.com



ATI seem to lump 10-bit frame buffer support under the term
"Smartshader":

http://ati.com/companyinfo/glossary/includes/list.html#smartshader

From what I can tell, "Smartshader" has been supported in both D3D and
OpenGL since the release of ATI's Catalyst 3.8 drivers:

http://www2.ati.com/drivers/catalyst_38_release_notes.html#168664

This occurred back in Oct. 2003:

http://www.ati.com/companyinfo/press/2003/4694.html

less than a year ago. So, perhaps the 10 bit framebuffers are now
supported in the OpenGL drivers. Either way, we're about to buy the
card. We'll give it a try and report what we find.

Cheers,

Martin Spacek
PhD student, Graduate Program in Neuroscience
Dept. of Ophthalmology and Visual Sciences
University of British Columbia, Vancouver, BC, Canada
604-875-4555 ext. 66282
mspacek@xxxxxxxxxxxxxxx
http://swindale.ecc.ubc.ca

----- Original Message ----- From: "Andrew Straw" <astraw@xxxxxxxxxxx>
To: <visionegg@xxxxxxxxxxxxx>
Sent: Thursday, July 29, 2004 11:57 PM
Subject: [visionegg] Re: 10-bit framebuffers


Martin Spacek wrote:



Hello,

There's some mention of 10-bit framebuffer support on the website.


We're


thinking of getting the ATI Radeon 9800, which claims to have both 10
bit DACs and 10 bit framebuffers, and using this with Vision Egg. Does
anyone have any experience with this? Can we expect to get 2^10 shades
of grey, or are there still OpenGL driver problems as mentioned on the
site?





I've tried and failed to get the 10 bit framebuffers to work in Windows
using OpenGL on both the Radeon 9800 Pro and the Matrox Parhelia.  This
was over a year ago now, though, so times may have changed.  There was a
thread about this on the psychtoolbox list with myself and Jon Peirce,
among others, sometime last year, if you want to read further.

Cheers!
Andrew



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