Re: image that resizes automatically to screen size in epub

[Chris Jones <cjns1989-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On Sun, Jun 14, 2020 at 06:15:47PM EDT, Chris Jones wrote:
> I have an image meant to be fit exactly one page (or should I say 
> screenful) that I would like the e-reading application to resize 
> automatically to the size of the e-reader's screen while preserving aspect 
> ration as is already done with the cover image.
> 
> The image can be a png, jpeg, or svg (the png and jpeg are generated from 
> the svg, itself created initially under latex as a pdf and converted to svg 
> via inkscape).
> 
> The svg file displays correctly under firefox and can be resized with no 
> visible loss of crispness & resolution.
> 
> Is there any way to do this currently in pandoc?
> 
> Thanks,
> 
> CJ
> 
> N.B. I tried to open this via the traditional mailing list 
> pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org from my mailer and it apparently never got 
> through.

I thought I'd experiment a little and use some "raw latex":

| # Planche 7
| <div id="cover-image">
| <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="100%" height="100%" viewBox="0 0 900 1200" preserveAspectRatio="none">
| <image width="900" height="1200" xlink:href="images/planches/pl7.jpg" />
| </svg>
| </div>

This html snippet works as expected when I manaually create the epub:
the pl7.jpg image is automatically sized to the full size of a 4:3
screen (by most ereader software).

But when I run a "pandoc md/snippet.md -o snippet.epub" command or such
the ensuing epubcheck complains about not finding pl7.jpg in the epub.

A quick look inside the epub reveals that the jpeg image is not
referenced in the EPUB/content.opf (the "manifest", I believe they call
it...) and that pandoc did not copy the image file to the EPUB/media/
directory.

In effect it looks as if pandoc silently ignores the contents of the
<image ... /> tag.

Is this the expected behaviour?

If so what would be the recommended workaroundą?

Thanks,

CJ

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