Re: Basic WYSIWYG printing in GNU Emacs (Arabic & Hebrew)

[Eli Zaretskii <eliz@gnu.org>]

> From: Anand Tamariya <atamariya@gmail.com>
> Date: Thu, 12 Aug 2021 14:21:58 +0530
> Cc: emacs-devel@gnu.org
> 
>  Since you know much more than I do about PostScript and PS printers,
>  may I ask you a question: if one sends RTL text embedded in a PS
>  program to a PS printer, does the printer have the capability to
>  reorder RTL text when it prints it?  That is, if you send a string of
>  RTL characters that way, are they printed in reverse order?  Or do PS
>  printers need the text in the "visual" order, already reordered for
>  display?
> 
> Two things to remember about PS printer:
> - It's like dumb terminal which places characters left to right unless specified otherwise.
> - It doesn't understand unicode, let alone RTL re-ordering.

Thanks.  Then maybe we should expose to Lisp the Emacs bidi reordering
engine, in the form of a function that would accept a string and
return that string reordered for display according to the UBA.  Let me
know if that would help you improve the ps-print machinery.