"the libpng/zlib license"
© Copyright 1995-2000 Anders F Björklund
except where indicated otherwise in the source code.
This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: