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 BSD license here
as part of the diskimagedevice project:
http://sf.net/projects/diskimagedevice/

Changes:

png.image 1.7 (19-Sep-2014)
- Fixed a bug in PenMap_ReleasePens() which could cause some pens to not get
  released.

png.image 1.6 (24-Aug-2010)
- Now uses WritePixelArray8 on OS3.0 instead of WritePixel loop.

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

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

png.image 1.3 (10-Aug-2010)
- Added CyberGraphX support.

Archive:  /home/aminet/aminet_root/doc//util/libs/png_image.zip
 Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
--------  ------  ------- ---- ---------- ----- --------  ----
   12580  Defl:N     5542  56% 2014-09-19 23:10 e15e935d  png.image
    1099  Defl:N      629  43% 2014-09-20 10:53 bf8b85a4  png_image.readme
   48628  Defl:N    22379  54% 2014-09-19 23:00 e544ed6e  z.library
--------          -------  ---                            -------
   62307            28550  54%                            3 files