GNU/Linux Gentoo Installing Libpng12 Guide
Hi! The Article shows you How to Install libpng 1.2 or libpng12 Library on Gentoo GNU/Linux.
Finally, the post’s Content is Expressly Reduced to Give Focus to the Essentials Instructions and Commands.

Open a Terminal Window
(Press “Enter” to Execute Commands)Installing the libpng12 Library.
If Got “User is Not in Sudoers file” then see: How to Enable sudoCopysudo su
Copyemerge libpng:1.2