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includegraphics 无文件扩展名

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includegraphics 无文件扩展名

当我想包含没有扩展名的图像时，如何使用 includegraphics？

当我尝试type=jpg手动设置时出现以下错误： LaTeX Error: Cannot determine size of graphic in images/posters/sample (no size specified)

如果我将其更改sample为sample.jpg全部有效，但我有一堆这些图像，我无法更改其后缀（另一个应用程序依赖于它）。

有什么建议吗？

答案1

我想不出一个简单的解决方案，但这里有一个可能的解决方案，可以适应所使用的内部命令\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}

它仅适用于 PDFLaTeX。

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