Installation:

1. Copy png.image SYS:Classes/Images/
2. Copy z.library SYS:Libs/

Requirements:

 - 68020+ CPU (no FPU required)
 - AmigaOS 3.0 or newer
 - z.library (included in archive)
   
Source code:

Source code for png.image and z.library is available under LGPLv3 license here
as part of the diskimagedevice project:
http://sourceforge.net/projects/diskimagedevice/

Changes:

1.5 (22-Aug-2010)
 - The RGBA->CLUT remapping code now allocates enough memory for the mask if
   the source/destination bitmaps are interleaved

1.4 (15-Aug-2010)
 - Added OCS/ECS/AGA support in png.image (alpha threshold is >= 128)

1.3 (10-Aug-2010)
 - Added CyberGraphX support

Archive:  /home/aminet/aminet_root/doc//util/libs/png_image.zip
 Length   Method    Size  Ratio   Date   Time   CRC-32    Name
--------  ------  ------- -----   ----   ----   ------    ----
   12444  Defl:N     5596  55%  08-22-10 13:12  0fc3ded9  png.image
     862  Defl:N      520  40%  08-22-10 13:12  290e7962  png_image.readme
   48496  Defl:N    22875  53%  08-20-10 16:36  7fac6a02  z.library
--------          -------  ---                            -------
   61802            28991  53%                            3 files