includegraphics without file extension

Question

How can I use includegraphics when I want to include an image which has no extension?

When I try to set type=jpg by hand I get the following error: LaTeX Error: Cannot determine size of graphic in images/posters/sample (no size specified)

If I change the sample to sample.jpg all works, but I have a bunch of theses images for which I cannot change the suffix (another application depends on it).

Any advice?

If you cannot change the original name of the image you could use a link/alias/whatever this is called on your OS with the name sample.jpg that links to sample. — samcarter_is_at_topanswers.xyz, Jul 25 '17 at 12:57
Sure, but the problem is I am including images from another system, and would prefer to avoid the overhead of copying / linking to images. Moreover, I have thousands of said images... — nir, Jul 25 '17 at 13:06
Call me lazy, but I would think there is a simple solution inside Latex — nir, Jul 25 '17 at 13:10
b.t.w, tried adding "\DeclareGraphicsExtensions{.pdf,.png,.jpg,}% Note the trailing ',' which defines an empty extension", but still am getting an error — nir, Jul 25 '17 at 13:10
Welcome to TeX.SX! Please help us (and also you) and add a minimal working example (MWE), that illustrates your problem. Reproducing the problem and finding out what the issue is will be much easier when we see compilable code, starting with \documentclass and ending with \end{document}. — Bobyandbob, Jul 25 '17 at 14:07
With context you could use something like `\starttext
\externalfigure[test][method=png]

\stoptext` seems to work — samcarter_is_at_topanswers.xyz, Jul 25 '17 at 14:43
Links may be just plain impossible - you could be working on a file system inside Dropbox. — Paulo Ney, Aug 07 '19 at 15:11
Related: Graphics file extensions and their order of inclusion when not specified — Werner, Aug 07 '19 at 17:09

score 1 · Answer 1 · answered Jul 26 '17 at 13:25

I can't think of a simple solution, but here's a possible solution that adapts the internals command used by \includegraphics.

\documentclass{article}
\usepackage{graphicx} 

\makeatletter
\newcommand{\jpg@Ginclude@graphics}[1]{%
  \begingroup
   \let\input@path\Ginput@path
   \filename@parse{#1}%
   \def\Gin@ext{.jpg}%
   \def\Gin@base{\filename@area\filename@base}%
   \Gread@jpg{\Gin@base}%
   \Gin@viewport@code\Gin@nat@height\Gin@ury bp%
   \advance\Gin@nat@height-\Gin@lly bp%
   \Gin@nat@width \Gin@urx bp%
   \advance\Gin@nat@width-\Gin@llx bp%
   \Gin@req@sizes
   \expandafter\ifx\csname Ginclude@jpg\endcsname\relax
     \Gin@drafttrue
     \expandafter\ifx\csname Gread@jpg\endcsname\relax
       \@latex@error {Can not include graphics of type: jpg}\@ehc
       \global\let\Gread@jpg\@empty
     \fi
   \fi
   \leavevmode
   \ifGin@draft
     \hb@xt@
     \Gin@req@width{\vrule \hss \vbox to \Gin@req@height{\hrule \@width
      \Gin@req@width \vss
      \edef\@tempa{\Gin@base}%
      \rlap{\ttfamily\expandafter\strip@prefix\meaning\@tempa}%
       \vss\hrule}\hss\vrule
     }%
   \else
    \@addtofilelist{\Gin@base}%
    \ProvidesFile{\Gin@base}[Graphic file (type jpg)]%
    \setbox\z@\hbox{\Ginclude@jpg{\Gin@base}}%
    \dp\z@\z@\ht\z@\Gin@req@height\wd\z@\Gin@req@width\box\z@
   \fi
  \endgroup
}%

\newcommand{\includejpgnoext}[2][]{%
 \begingroup
  \let\Ginclude@graphics\jpg@Ginclude@graphics
  \includegraphics[#1]{#2}%
 \endgroup
}

\makeatother

\begin{document}
\includejpgnoext{sample} % jpg image file called 'sample' with no extension   
\end{document}

It only works with PDFLaTeX.

includegraphics without file extension

1 Answers1