[Mesa-dev] Correction about GL_SUN_slice_accum

[Brian Paul]

On 09/19/2010 09:55 PM, randrianasulu at gmail.com wrote:
> It is not as old  as I was thinking ....
>
> http://www.opengl.org/registry/specs/SUN/slice_accum.txt
>
> $Date: 02/03/13 15:15:35  $Revision: 1.3 $
>
>
> But extension itself talks about accumulation buffer(s)[0], they supported
> currently in software in mesa, and many old  consumer-level cards seems don't
> have them implemented in hardware, unfortunately including old (pre-nv30)
> Nvidia cards, as far as i know .....
>
> On nv30 and up accumulation buffer can be emulated, sort of. See [1], or [2]
> for 12-bit accumulation buffer.  There was some interest in implementing
> accum. buffer  in Mesa as metaop (?) or in mesa state tracker for Gallium
> drivers, but nothing come out, AFAIK. Sorry, can't find  links right now
>
> [0]
> http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.91.4497&rep=rep1&type=pdf - "The
> Accumulation Buffer: Hardware Support for High-Quality Rendering"
>
> [1] http://www.petewarden.com/notes/archives/2005/05/fragment_progra.html
> [2]
> http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.14.9136&rep=rep1&type=pdf - "Complex
> Water Effects at Interactive Frame Rates"

Did you post an earlier message about this?  Are you advocating that 
we implement this extension?  If so, why?

-Brian