apng

This is a fork of code in Go's image/png package.

Package apng is used to do low-level APNG encoding. The APNG format is not widely supported in browsers, however, it can be an efficient way to represent raster graphics in a lossless encoding, for instance to overlay over a video with ffmpeg.

For encoding details, see:

• https://en.wikipedia.org/wiki/APNG#Technical_details
• https://wiki.mozilla.org/APNG_Specification
• https://www.w3.org/TR/PNG/