libXpm and color depth

Kommander Mighty Aura <[email protected]>
Newsgroups gmane.emacs.windows
Message-ID <[email protected]> 
What does handle the color depth for images and any other image and/or
video in Emacs? Is it libXpm or only the extension´s respective DLLs?

I did read somewhere it was handled by libXpm, and I need to clear
this up. The closest I got to my answer can be found here: 
<http://lists.gnu.org/archive/html/help-emacs-windows/2014-12/msg00006.html>

>It doesn't include any DLLs except libXpm (which is needed for the
tool-bar icons).
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