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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: [Patch] Basic WYSIWYG printing in GNU Emacs
Date: Wed, 11 Aug 2021 19:51:46 +0300
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 (message from Anand Tamariya on Wed, 11 Aug 2021 21:19:14 +0530)
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> From: Anand Tamariya <atamariya@gmail.com>
> Date: Wed, 11 Aug 2021 21:19:14 +0530
> Cc: emacs-devel@gnu.org
> 
>  > Theoretically, there's no dependency except Ghostscript which does most of the heavy lifting for
>  printing in
>  > Emacs. Fonts other than Truetype might require additional configuration as defined in Ghostscript
>  manual.
> 
>  Could you please point to the code which uses or requires Ghostscript,
>  I don't think I see it in the patch you sent.  And since you seem to
>  be using the HarfBuzz rendering, why do we need Ghostscript at all?
> 
>  Thanks.
> 
> Correction is in order - the screenshot/ rendering within Emacs requires Ghostscript. Printing to printer
> would use OS specific print commands e.g. lpr on *nix.

Now I'm even more confused.  How does one "render within Emacs with
Ghostscript"?  Emacs display rendering uses our display engine, which
doesn't need Ghostscript, and AFAIK cannot use it.  I guess I'm
misunderstanding something very basic here...