bug#65187: 29.1; right edge of wide image can not be displayed in image-mode

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: 65187-done@debbugs.gnu.org,  awrhygty@outlook.com
> Date: Tue, 15 Aug 2023 01:58:12 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > It _is_ made visible, but if the portion of the image that exceeds the
> > window's width is small enough, the result is that the few extra
> > pixels are clipped, but from the display engine's POV we are "at the
> > right edge".  IOW, the horizontal scrolling in Emacs works on the
> > column granularity, not on pixel granularity.
> 
> Would it make sense to scroll one column further then?

That wouldn't help in this case.  Here, we already have just one
column, it just is a very wide column.

Once again, this is something very inherent in how we display images
that exceed the window edge, and changing that is not possible by some
simple tricks.  Sorry.