# From http://sourceforge.net/projects/libpng/files/libpng16/1.6.28/
sha1 ff4dceadb15e2c929ad26283118d56f66f4a6cff libpng-1.6.28.tar.xz
# Locally computed:
sha256 d8d3ec9de6b5db740fefac702c37ffcf96ae46cb17c18c1544635a3852f78f7a  libpng-1.6.28.tar.xz