lodePNG

LodePNG version 20160124 Copyright (c) 2005-2016 Lode Vandevenne LodePNG is a PNG image decoder and encoder, all in one, no dependency or linkage to zlib or libpng required. It's made for C (ISO C90), and has a C++ wrapper with a more convenient interface on top. https://github.com/lvandeve/lodepng