[png-mng-announce] pngcheck 2.1.0 (including pngsplit, png-fix-IDAT-windowsize)

[Greg R. <ne...@po...>]

I've uploaded the next release of pngcheck, version 2.1.0, to the usual
places:

	http://www.libpng.org/pub/png/apps/pngcheck.html

It now supports all officially defined PNG, MNG, and JNG chunks (including
the recently approved sTER), and it flags several more PNG errors, courtesy
of Chris Nokleberg's "brokensuite" images.  It also includes a pair of new
utilities, pngsplit and png-fix-IDAT-windowsize.  The latter simply fixes
the zlib header in images created with libpng 1.2.6, but pngsplit can be
used to break apart PNG, MNG or JNG images, rearrange chunk order, add or
delete chunks, and reassemble them trivially with basic filesystem tools
(e.g., cat(1) or "copy /b").  It is thus a reasonably useful utility for
creating specialty PNGs with features not yet supported by "normal" software.

pngcheck itself remains under its original MIT/X11-style license, but the
new utilities are GPL'd.

Greg

P.S.  I was unable to test Makefile.w32, so I'm not completely certain it
      will build the two new programs without some minor tweaking.  Please
      let me know of any issues.