Barry Brevik <> wrote:
> I am writing an app which, at a certain point, needs to read a .PNG
> graphics file. 

Your unpack question having been ably answered by others, I just thought
to ask whether you had considered using any of the existing modules that
understand png files, if it is image meta data that you are after? For
example Image::Info or Image::ExifTool.

HTH

-- 
Brian Raven 
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