[Mesa-dev] Correction about GL_SUN_slice_accum

[randrianasulu at gmail.com]

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"