Avoid upsizing of images globally

Question

When I use common options of \includegraphics like width, height, scale, etc. I would like the resulting size of the image never exceeds its natural size.

In case of width, replacing it with the max width option (borrowed from adjustbox package) it's a solution, but what about scale?

And what if I want to avoid upsizing of images globally?

P.S. I think that a nice solution would be adding a new option to \includegraphics like did some answers to this other question: Size image by area

scale is surely not an issue at all. you are just saying the scale factor is at most 1 so that's an author requirement not something for latex to check. — David Carlisle, Jul 15 '21 at 12:36
@egreg Actually I use scale very rarely, but I would like the solution to be able to avoid upsizing of any image over its natural size also if I use scale or any other way to resize an image (at least with \includegraphics). — mmj, Jul 15 '21 at 12:56
A case may arise if you are writing a template that uploads images later,
provided by a user. You may want to keep images within certain dimensions, except if they are smaller than the allotted space.
In that case, you should check the actual dimensions of the image to be inserted and then decide which \includegraphics setup to apply.

See https://tex.stackexchange.com/a/185272/161015 — Simon Dispa, Jul 15 '21 at 13:21

John Kormylo · Accepted Answer · 2021-07-19T14:02:14.640

Here is a quick fix. THE MWE should produce three identical images and one smaller image. Note that \includelimit only supports size changes.

BTW, this also answers the linked question. Also, do not use \dimen0 with \includegraphics.

\documentclass{standalone}
\usepackage{graphicx}
\newcommand{\includelimit}[2][]% will get bad results with [rotate]
{\bgroup
  \sbox0{\includegraphics{#2}}%
  \sbox1{\includegraphics[#1]{#2}}%
  \dimen1=\ht0
  \ifdim\ht1<\dimen1 \dimen1=\ht1\fi
  \dimen2=\wd0
  \ifdim\wd1<\dimen2 \dimen2=\wd1\fi
  \includegraphics[width=\dimen2, height=\dimen1]{#2}%
\egroup}
\begin{document}
\includegraphics{example-image}
\includelimit[width=20cm]{example-image}
\includelimit[height=20cm]{example-image}
\includelimit[scale=0.5]{example-image}
\end{document}

This shows how to replace \includegraphics with the new version. I do NOT recommend this since it no longer supports all the keywords.

\documentclass{standalone}
\usepackage{graphicx}
\let\oldincludegraphics=\includegraphics
\renewcommand{\includegraphics}[2][]% will get bad results with [rotate]
{\bgroup
  \sbox0{\oldincludegraphics{#2}}%
  \sbox1{\oldincludegraphics[#1]{#2}}%
  \dimen1=\ht0
  \ifdim\ht1<\dimen1 \dimen1=\ht1\fi
  \dimen2=\wd0
  \ifdim\wd1<\dimen2 \dimen2=\wd1\fi
  \oldincludegraphics[width=\dimen2, height=\dimen1]{#2}%
\egroup}
\begin{document}
\oldincludegraphics{example-image}
\includegraphics[width=20cm]{example-image}
\includegraphics[height=20cm]{example-image}
\includegraphics[scale=0.5]{example-image}
\end{document}

This solution works, thanks! However I wonder if it's possible to add a new option to \includegraphics like did some answers to this other question: https://tex.stackexchange.com/q/446660 — mmj, Jul 16 '21 at 10:07

Avoid upsizing of images globally

1 Answers1