Re: math as image in Info INFO_MATH_IMAGES

[Eli Zaretskii]

> Date: Wed, 8 Jan 2025 20:46:59 +0100
> From: pertusus@free.fr
> 
> On Thu, Jan 02, 2025 at 12:57:43AM +0000, Gavin Smith wrote:
> > If texi2any generates the images with a given DPI (dots per inch) setting
> > to dvips (-d argument) (say 200), then it seems that all Emacs would need
> > is a variable to specify the DPI of the Info images.  The image size
> > would then be scaled according to the size of the font used to display
> > the text in the Info buffer.  Suppose this is a nominal 10pt (10/72.27 in).
> 
> I think that we should also know/transmit the actual font size, as it
> depends on how we call LaTeX.

AFAIU, that can only be done in the printed output.  In Info output,
makeinfo cannot know the size of the font that will be used by Emacs,
since this is subject to customization of the Emacs users on their
end-user systems, and could well be different between users.

> What to do next?  Add information on DPI/font size/DPL to the image in
> Info, contact Emacs persons who could discuss the issue/do the change?
> (Through Eli, maybe?).

My suggestion would be to start a discussion on emacs-devel@gnu.org,
where you will find people who can adapt the Emacs Info reader to this
new functionality, and can also give you feedback for any concrete
proposals for extending the Info format in support of this.