Re: Translating the eps files in lispintro

[Jean-Christophe Helary]

> On Jan 21, 2024, at 23:40, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> On January 21, 2024 3:47:42 PM GMT+02:00, Stefan Kangas 
> <stefankangas@gmail.com> wrote:
>> Jean-Christophe Helary <jean.christophe.helary@traductaire-libre.org>
>> writes:
>> 
>>> Is there a practical way to edit the EPS files in the Introduction to 
>>> Programming in Emacs Lisp?
>>> 
>>> I tried to modify the text directly in Emacs but the result was not 
>>> satisfying.
>>> 
>>> I was wondering if it would not be a better solution to use SVG instead?
>> 
>> Why not, but does texinfo support SVG?  Starting with which version?

It's more a question of using SVG as a base from which to convert to other 
formats. See below.

> AFAIK, Texinfo doesn't support SVG images in Info documents.

Info is not concerned by eps or pdf either.

eps seems to be here to cover the TeX (DVI) output and pdf is here for the TeX 
(PDF) output. Html and info use the plain text graphs that are in the texi 
sources, and I guess DocBook too:

@c cons-cell-diagram #2
@ifnottex
@smallexample
@group
bouquet
     |
     |     ___ ___      ___ ___      ___ ___
      --> |___|___|--> |___|___|--> |___|___|--> nil
            |            |            |
            |            |            |
             --> rose     --> violet   --> buttercup
@end group


The problem is that it does not seem trivial to edit the files in Emacs and 
replace the English with Japanese strings, for ex. So my question is: is EPS an 
accepted (editable) source format?

It would seem more practical to have a format that's a bit easier to edit (SVG, 
if only because it supports unicode) and from there use conversion tools to 
create the required formats:

eps for TeX (DVI output)
pdf/png/jpg (jpeg) for TeX (PDF output)
png, jpg (jpeg), gif for HTML output (although the current output does not use 
images but just plain text)
eps, gif, jpeg (jpg), pdf, png, svg for DocBook output

https://www.gnu.org/software/texinfo/manual/texinfo/texinfo.html#Images


Considering the needs of the lisp introduction, we could have svg for an 
eventual DocBook output, png for the HTML and PDF output, eps for the DVI 
output and we'd be all set.

Or maybe the actual source for the EPS (and PDF) files found in the intro is 
somewhere else? Are the files created from the texinfo source?