Path: utzoo!attcan!uunet!cs.utexas.edu!usc!rutgers!aramis.rutgers.edu!topaz.rutgers.edu!eric
From: eric@topaz.rutgers.edu (Eric Lavitsky)
Newsgroups: comp.sys.amiga.tech
Subject: Re: 24bit/pixel
Keywords: IFF 24-bits truecolor
Message-ID: <Nov.4.14.46.13.1989.23574@topaz.rutgers.edu>
Date: 4 Nov 89 19:46:15 GMT
References: <5342@spudge.UUCP> <932@mit-amt.MEDIA.MIT.EDU> <Nov.3.11.11.45.1989.8156@pilot.njin.net>
Distribution: na
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 34

In article <Nov.3.11.11.45.1989.8156@pilot.njin.net> limonce@pilot.njin.net (Tom Limoncelli) writes:
> In article <932@mit-amt.MEDIA.MIT.EDU> ralph@atrp.mit.edu (Ralph L. Vinciguerra) writes:
> <much deleted>
> > I'm thinking of defining an alternate to ILBM chunks which
> > allow non-bitplane interleaved image storage (like perhaps line interleaved
> > instead).
> 
> That's called "chunky" bitmaps, and it's usually done on a per-pixel
> basis.  It is *much* easier for a program to work with if one is doing
> internal calculations.  At DevCon, C-A officially adopted a chunky
> bitmap IFF spec (which was co-developed by ASDG & C-A)

The 24-Bit IFF standard is *not* chunky. It is rather a natural
extension of the ILBM spec to support images up to 24-bitplanes. It
was developed by ASDG - the only thing that was changed in the final
spec due to external input was removal of ASDG's improper usage of
the CMAP chunk for color correction information. A new chunk has been
added for color correction, but the exact name escapes me at the
moment. The latest format can be found on BIX in amiga.dev/iff ...

> (DISCLAIMER:  I'm not associated with ASDG or C-A and I wasn't at
> DevCon, but this is what I recall from some net (and non-net)
> summaries of the last DevCon.  I'm sure I'll be flameboyantly
> corrected for any discrepancies :-))

I'm also not associated with ASDG, but I was at DevCon and I am an
interested party since my company's products support 24-bit image
processing.

> Drew University   -- Tom Limoncelli           
-- 
Eric Lavitsky				UUCP:	...rutgers!tstream!eric
Active Circuits, Inc.				eric@topaz.rutgers.edu
201-223-5999				BIX:	eric