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From: Eric Abrahamsen <eric@ericabrahamsen.net>
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Subject: Re: [26.3] large image scrolling gets stuck
Date: Thu, 10 Oct 2019 10:06:39 -0700
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Eric S Fraga <e.fraga@ucl.ac.uk> writes:

> On Wednesday,  9 Oct 2019 at 20:38, dick.r.chiang@gmail.com wrote:
>> SPC is `gnus-summary-next-page` from the summary buffer.  If the article
>> contains a large image, SPC stops scrolling upon hitting the image.
>
> Just to add that I see this as well.  If the image is larger than the
> window, possibly in either dimension, scrolling doesn't happen.

My understanding is that this is a general problem with image display in
Emacs, nothing particular to Gnus. Something about how Emacs calculates
line heights when scrolling -- maybe images are calculated to fit on a
single really tall line, so you can only scroll all the way past them?
Something like that.