News and History of the PNG Development Group from 1996
Herein lie news items and historical stuff primarily of interest to the
Portable Network Graphics Development Group itself. Feel free to poke
around even if you're not a member, though. Note that some of the links,
particularly the older ones, are broken; in some cases this is explained by
later entries. Other links (CompuServe, tcg.arl.mil) have fallen prey to
reorganizations or upgrades; should they ever reappear, the entries below
will be updated as needed.
Keep in mind that this is history here...
- current - see here
- 31 December 1996 - The PNG home pages have now moved to an
even shorter URL, http://www.wco.com/~png/ . (This page, for example, can
now be referenced as http://www.wco.com/~png/pngnews.html). The zlib home
pages have also moved: http://www.cdrom.com/pub/infozip/zlib/ . The old site should have redirects in
place so that everything is transparent. (Big thanks to Mark Adler for hosting
the PNG pages until now!)
- 31 December 1996 - Draft 30 of the MNG specification is released.
- 30 December 1996 - Draft 29 of the MNG specification is released.
- 19 December 1996 - Draft 28 of the MNG specification is released.
- 12 December 1996 - Draft 27 of the MNG specification is released.
- 7 December 1996 - Draft 26 of the MNG specification is released.
- 22 November 1996 - Draft 25 of the MNG specification is released.
- 15 November 1996 - Michael
Battilana updates his article on the GIF/LZW
controversy with information on Unisys's new LZW licensing
- 15 November 1996 - Draft 24 of the MNG specification is released.
- 15 November 1996 - adobe.mag publishes an article
on the history
of PNG (PDF format only) by J. Scott Hamlin. (See the Past Articles archive
for a brief synopsis.)
- 11 November 1996 - MacWeek publishes an article on PNG by Jeff
Eaton. One interesting tidbit is that Netscape is still waffling
more than any five Eggo commercials... Sigh.
- 8 November 1996 - Draft 23 of the MNG specification is released.
- 1 November 1996 - Draft 22 of the MNG specification is released.
- October 1996 - The McGraw-Hill World Wide Web Training Manual, by
Wagner, is published with PNG excerpts taken from these very web
- 25 October 1996 - Draft 21 of the MNG specification is released.
- 14 October 1996 - The Internet Assigned Numbers Authority (IANA) formally approves
image/png as an Internet
Media Type. Can the official RFC issuance be far behind?
(See also the 11 July 1996 and 30 May 1996 entries below.)
- 7 October 1996 - Draft 20 of the MNG specification is released.
- 7 October 1996 - More press coverage on PNG: Investor's Business Daily and
- 4 October 1996 - Draft 19 of the MNG specification is released.
- 1 October 1996 - PNG is announced as the
W3C's first official
in this press
release. The endorsement is the subject of a mostly accurate
by C|Net's Tim Clark. The PNG
group's own Chris Lilley
is prominently quoted (from a 2am interview), you betcha.
- 30 September 1996 - Draft 18 of the MNG specification is released.
- 28 September 1996 - Draft 17 of the MNG specification is released.
- 14 September 1996 - Draft 16 of the MNG specification is released.
- 7 September 1996 - Draft 15 of the MNG specification is released.
- 2 September 1996 - Draft 14 of the MNG specification is released.
- 28 August 1996 - Draft 13 of the MNG specification is released.
- 24 August 1996 - Draft 12 of the MNG specification, formerly
known as "PNF," is released. (MNG stands for Multiple-image Network
Graphics and is the PNG-based animation format.)
- 16 August 1996 - Draft 11 of the PNF specification is released.
- 13 August 1996 - Draft 10 of the PNF specification is released.
- 10 August 1996 - Draft 9 of the PNF specification is released.
- 4 August 1996 - The Virtual Reality Modeling Language (VRML) 2.0
released, and PNG is one of two image formats required for
conformance. (JPEG is the other.) So there.
- 27 July 1996 - Draft 8 of the PNF specification is released.
- 24 July 1996 - zlib 1.0.4 is released. This version fixes a
rare bug wherein the decoder could continue "decoding" garbage beyond
the end of the true compressed data.
- 20 July 1996 - Draft 7 of the PNF specification is released.
- 11 July 1996 - Draft 6 of the PNF specification is released.
- 11 July 1996 - The Internet Engineering Steering Group (IESG)
approves the PNG Specification 1.0 as an official Informational RFC.
- 5 July 1996 - Draft 5 of the PNF specification is released.
- 3 July 1996 - zlib 1.0.3 is released.
- 2 July 1996 - Draft 4 of the PNF specification is released.
- 1 July 1996 - The W3C promotes
the PNG specification from Working Draft status to Proposed
Recommendation. Final disposition is to be announced by
14 September 1996.
- 28 June 1996 - Draft 3 of the PNF specification is released.
- 26 June 1996 - Draft 2 of the PNF specification is released.
- 25 June 1996 - Glenn Randers-Pehrson releases Draft 1 of the PNF
specification ("Portable Network Frame"). This describes how multiple
sub-images can be placed to create a single frame and is intended to be
the foundation for MNG, the Multiple-image Network Graphics format (i.e.,
the follow-on to PNG that supports animations).
- 17 June 1996 - libpng 0.89 beta is released by Andreas Dilger in
the absence of Guy, who appears to have vanished into the hyperspace
- 30 May 1996 - Tom Lane, final editor of the PNG spec, declares,
"The PNG Spec Is Done." It
still has "Draft" boilerplate at the top and will have "0.98" in
the filename until the W3C and IETF folks finish whatever it is they
do, but this is the PNG 1.0 specification. After the W3C Tech Report
and IETF RFC are released, the filenames will also be updated to refer
to "1.0." (Official IANA image/png status should occur at
that time as well.)
- 23 May 1996 - zlib 1.0.2 is released. This version includes
Windows DLL and Unix shared-library support, DOS medium-memory-model
support, and generally all the little odds and ends that have been on
the to-do list. In other words, this is the one to get, and don't
expect another release for a while.
- 22 May 1996 - The specifications for zlib, the deflate algorithm
and gzip are all released as official Internet RFCs (numbers 1950, 1951
and 1952, respectively). Nice work, guys.
- 21 May 1996 - zlib 1.0.1 (not a beta!) is released. (1.0
was skipped due to some premature `1.0' references in beta version 0.99.)
- 24 April 1996 - The top three image viewers on
Stroud's Win95 Graphics
Viewers page all support PNG and got 4 1/2 stars each; program
number four only got 4 stars, and its review listed lack of PNG support
as one of its cons(!). There ya go: PNG support is all you need to be
- 19 April 1996 - The primary European mirror site at the
University of Manchester,
formerly maintained by Chris Lilley, is dying. The mirroring software broke silently
several months ago (without being noticed), and Chris has recently
moved on to a new job. The good news is that Dave Beckett still
maintains an alternate UK
mirror site at HENSA; see 20 December 1995 below for details.
- 3 April 1996 - The first PNG baby (see 24 October 1995
below) repeatedly tries to grab some rendered balls off of Dad's PNG
T-shirt. Oy, will the cuteness never cease?
- 15 March 1996 - An old revision of the PNG spec, draft 10 (see
5 May 1995 below) is given a
three-star rating (out of four; represents 22-27 points out of 30)
by Magellan. [Enter "PNG" in
Magellan's search field. The URL changes every day, apparently.]
- 11 March 1996 - Version 0.96 of the PNG specification is released.
Aside from the image/png registry issue, this thing is done.
Consider this to be effectively the 1.0 specification.
- 24 February 1996 - PNG on TV! CSPAN-2 broadcasts a one-hour
talk by Tim
Berners-Lee on the future of the WWW (from a conference at the
JFK School of Government on 6 February), and PNG is mentioned
several times. Unfortunately, Greg doesn't get CSPAN-2...
- 23 February 1996 - The PNG specification (version 0.95) is
released as an Internet Draft by the Internet Engineering Task Force (IETF). (See the
PNG docs page for up-to-date pointers.)
- 19 February 1996 - The zlib Home Page is ready to rock.
- 14 February 1996 - Vince Sabio of the
Army Research Laboratory writes a
PNG for the Adobe Photoshop mailing list. See also his related
- 12 February 1996 - The March 1996 issue of the
Linux Journal arrives with
a reasonably accurate article on graphics formats, including PNG.
- 29 January 1996 - zlib 0.99 beta is released.
- 26 January 1996 - libpng 0.88 beta is released.
- 16 January 1996 - libpng 0.87 beta is released, virtually
complete in all respects except for improved dithering support.
- 10 January 1996 - libpng 0.86 beta is released with push-model
support at last (although Greg always thought it was pull-model...).
Here are some related PNG pages at this site:
Last modified 27 January 2013.
Copyright © 1995-2013 Greg Roelofs.