Are you aware of the existence of CPAN, a repository of modules to perform specific functions/provide extensions?

If not, you should take the earliest opportunity to become away aware.

For just one sample (from many in CPAN), a simple search, "site:CPAN.org png," provides:

Image::PNG - search.cpan.org
search.cpan.org/perldoc?Image::PNG
NAME ^. Image::PNG - Read and write PNG (Portable Network Graphics) files ...

Since it appears that 'doze is your OS, you may be using Active State's Perl... in which case, many Modules found in CPAN have been provided in Win form for acquisition and installation with ppm.