PingPong version 1.28 readme-file
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PingPong is a dedicated PNG (Portable Network Graphics) viewer for the
NeXTstep platform. You can open PNG files by double-clicking on them
and you can save them as TIFF files. PNG-files with alpha channel or
transparency chunck are displayed on a light-gray background and will
be converted to TIFF files with alpha. The info-panel gives a demo of
the Adam-7 interlacing method adopted by the PNG standard.

To install, uncompress by "gzip -d PingPong-#.##-NI.tar.gz", followed
by "tar xvf PingPong-#.##-NI.tar" or use Opener.app. Then copy the 
PingPong.app to either your ~/Apps or to /LocalApps. After logout and 
login, you can view a PNG-file by double-clicking on it.

This utility uses the libpng software written by Guy Eric Schalnat, the
libz compression library from Jean-loup Gailly and Mark Adler and I
stole a lot from the .pic viewer written by by Don Yacktman.

This program is freeware: you may copy, distribute and use this
application as long as no fee is charged beyond standard distribution
fees. I always appreciate it of course to hear something from a happy
user, so send me your comments.

Because I run NeXTstep 3.2 (on a NeXTstation color), I could only 
compile for m68k and i386. If you need a version for HP or SUN, send
me an e-mail for the sources.

Willem van Schaik (willem@gintic.ntu.edu.sg), Singapore, 1996

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Version history:
	1.28	Solved some bugs related to large images in NS3.3
	1.27	Use gamma correction of libpng-0.90 instead of own
	1.26	Clean-up of info-panel, correct Adam-15 demo 
	1.21	Solved some bugs, a.o. output TIFF format 
	1.20	Inspector for PNG format
	1.10	Added Adam-7 demo to InfoPanel
	1.01	Compiled for FAT (black and white, no green or blue)
	1.00	First sunday-afternoon version.

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