Specification: http://wiki.mozilla.org/APNG_Specification http://littlesvr.ca/apng/ Implemented in Mozilla Firefox 3 and Opera 9.5 on. (Other applications: http://en.wikipedia.org/wiki/Animated_Portable_Network_Graphics#Application_support) Note: This it unsupported by upstream, even more - it was rejected in voting. Tested to compile, no functionality testing from my POV.
Created attachment 140372 [details] libpng ebuild with APNG support
*** This bug has been marked as a duplicate of bug 183370 ***