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- This is a very simple PNG (Portable Network Graphics) viewer for
- NeXTstep. 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.
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- 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 M86K and I386. If you need a version for HP or SUN, send
- me a mail to get the sources.
-
- Willem van Schaik (gwillem@ntuvax.ntu.ac.sg), Singapore, 1995
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- Version history:
- 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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