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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: SVG displayed image size
Date: Sat, 13 Mar 2021 09:15:19 +0200
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In-Reply-To: <87ft1046yx.fsf@gmail.com> (message from Matt Huszagh on Fri, 12
 Mar 2021 09:28:22 -0800)
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> From: Matt Huszagh <huszaghmatt@gmail.com>
> Cc: help-gnu-emacs@gnu.org
> Date: Fri, 12 Mar 2021 09:28:22 -0800
> 
> SVG images are displayed smaller than I would expect in Emacs. How is
> this controlled? I spent a while looking through image display functions
> in elisp, but was not able to figure out how Emacs determines the actual
> size of the image display in, e.g., image-mode. I've compiled Emacs with
> SVG support, of course.
> 
> For instance, I have an SVG image with the width attribute specified as
> about 20mm, but it displays as well below 2cm on my screen. I have an
> HiDPI display and I expect these things are related.

If this is a HiDPI display, I guess the next question will be "what
Emacs version is that?"