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

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Lars Ingebrigtsen <larsi@gnus.org>
>> Date: Sun, 17 Nov 2019 19:25:34 +0100
>> Cc: 38176@debbugs.gnu.org
>> 
>>         (when (or (= (window-vscroll) (image-scroll-up arg))
>> 
>> 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.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no