bug#38176: 27.0.50; pdf-tools images do not display

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: ofv@wanadoo.es,  38176@debbugs.gnu.org
> Date: Sun, 17 Nov 2019 19:54:44 +0100
> 
> >> It's comparing the output of window-vscroll (which returns the position
> >> in number-of-lines, not pixels) with the return value of
> >> image-scroll-up, which returns a value in pixels.  It's not documented
> >> at all what the latter function is supposed to return, so it looks like
> >> a bug to me that pdf-tools relies on it.
> >
> > This was supposed to be fixed already, see bug#37578.
> 
> Hm...  That and the related bug#37874 fixes the problem in doc-view that
> the change in image-mode caused, if I read this correctly.  But the
> problem here was with the out-of-tree pdf-tools package, which
> apparently needs the same fixes that doc-view got.

No, 37874 is about pdf-tools.  The author says there the fix is on a
branch, so maybe that's why Óscar doesn't have it yet.