The PNG Guide is an eBook based on Greg Roelofs' book, originally published by O'Reilly.


Amaya replaced Arena as the W3C's test-bed browser in 1996 and has always included PNG support. Unlike Arena, it runs under not only various flavors of Unix, but also Windows 95, 98, and NT. Although it supports transparency, its implementation was still somewhat broken as of version 1.4; under Linux, it appeared to support only binary transparency, and that only for palette-alpha images (that is, images whose palette effectively consists of red, green, blue, and alpha values). Amaya 1.4's support for gamma correction also appeared to be incorrect but at least partially functional. On the positive side--and not surprisingly--it handled OBJECT image tags completely correctly, including those with other OBJECTs nested inside. Amaya is freely available for download from

Last Update: 2010-Nov-26