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tex4ebook：无法使用 \includegraphics 和包 \usepackage 包含图片

tag-icon • tag-icon miktex2.9 tex4ebook
tex4ebook：无法使用 \includegraphics 和包 \usepackage 包含图片

tex 文件的序言：

%% LyX 2.3.3 创建了此文件。有关更多信息，请参阅http://www.lyx.org/. %%除非您确实知道自己在做什么，否则请不要编辑。

\documentclass[letterpaper,oneside,english,oldfontcommands]{memoir}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}
\usepackage{amsmath}
\usepackage{graphicx}
\makeatletter

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% LyX specific LaTeX commands.  

\special{papersize=\the\paperwidth,\the\paperheight}
\makeatother
\usepackage{babel}  
\begin{document}

**The latex code block dealing with including graphics:**

\begin{figure}  
\centering  
\includegraphics[scale=0.5]{Integration.png}  
%\par\end{centering}    
\end{figure}    

**The tex4ebook command when executed goes like this:**

tex4ebook -s test2.tex -f epub3 mathml  
[STATUS]  tex4ebook: Conversion started
[STATUS]  tex4ebook: Input file: test2.tex
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (MiKTeX 2.9.7250 64-bit)
entering extended mode
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (MiKTeX 2.9.7250 64-bit)
entering extended mode
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (MiKTeX 2.9.7250 64-bit)
entering extended mode

**dvipng: Fatal error, PK file C:\Users\srirams05\AppData\Local\MiKTeX\2.9\fonts/pk/cx/jknappen/ec/dpi576\ecrm1000.pk ends prematurely**

        1 file(s) copied.
        1 file(s) copied.
        1 file(s) copied.
        1 file(s) copied.
The system cannot find the file specified.
        1 file(s) copied.
HTML Tidy for Windows released on 25 March 2009
        1 file(s) copied.
[STATUS]  tex4ebook: Conversion finished

唯一的问题EPUB是缺少图形。如果LaTeX删除上面处理图形的代码块，则不会出现问题……我怀疑问题出在dvipng和MikTeX……

我正在使用tex4ebook提供的MikTex 2.9。

答案1

看来 PNG 文件被错误识别了，TeX4ht 试图将其作为 EPS 文件包含。这导致调用dvipng。尝试将此文件放入graphics.4ht您的文档目录中：

% graphics.4ht (2019-11-25-09:03), generated from tex4ht-4ht.tex
% Copyright 1997-2009 Eitan M. Gurari
% Copyright 2009-2019 TeX Users Group
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either
% version 1.3c of this license or (at your option) any
% later version. The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions
% of LaTeX version 2005/12/01 or later.
%
% This work has the LPPL maintenance status "maintained".
%
% The Current Maintainer of this work
% is the TeX4ht Project <http://tug.org/tex4ht>.
%
% If you modify this program, changing the
% version identification would be appreciated.

   \expandafter\let\csname includegraphics \endcsname\includegraphics
\def\includegraphics{\expandafter\protect\csname includegraphics \endcsname}
\def\grf:removequote"#1"{#1}
\def\grf:thrashname#1\relax{}
\def\grf:fixquotes{%
    \@ifnextchar"{\edef\Gin@base{\expandafter\grf:removequote\Gin@base}\grf:thrashname}{\grf:thrashname}}
\def\grp:warning#1{\no:bound#1(no BoundingBox)//\:warning{#1}}
\def\no:bound#1(no BoundingBox)#2//{\gdef\noBoundingBox{#2}\ifx
   \noBoundingBox\empty \global\let\noBoundingBox\:UnDef\fi}
\let\:tempc\Gin@setfile
\pend:defIII\:tempc{\a:graphics
    \global\let\noBoundingBox\:UnDef
    \let\@latex@error\grp:warning \let\@ehc\empty}
\append:defIII\:tempc{\b:graphics\grf:gobble\leavevmode grf:gobble}
\HLet\Gin@setfile\:tempc
\NewConfigure{graphics*}[2]{%
   \expandafter\ifx \csname :.#1\endcsname\relax
      \pend:defIII\n:Gin@setfile:{\csname :.#1\endcsname}%
   \fi
   \def\:temp{#2}\ifx \:temp\empty
     \expandafter\let\csname :.#1\endcsname\:UnDef
   \else
     \expandafter\def\csname :.#1\endcsname{\edef\:temp{\detokenize{.#1}}%
        \ifx \:temp\Gin@ext  \let\a:graphics\relax
           \def\G:cnfg{#2}\expandafter\grf:gobble \fi}%
   \fi }
\NewConfigure{graphics}{2}
\def\grf:gobble#1\leavevmode#2grf:gobble{%
   \PictureOff\expandafter\grf:fixquotes\Gin@base\relax#1\PictureOn \G:cnfg \let\G:cnfg\relax}
\let\G:cnfg\relax

\let\old:GreadEps\Gread@eps
\def\Gread@eps#1{\old:GreadEps{"#1"}}
\def\if:boundingbox#1#2{\ifdim\Gin@req@width=\Gin@nat@width\ifx\noBoundingBox\UnDefined#1\else#2\fi\else#1\fi}

\Hinput{graphics}
\endinput

它是负责图形包含的当前代码。

答案2

我也遇到过丢失图像的情况，但问题的根源完全不同。似乎 tex4ebook (v0.3g，ubuntu) 几乎但并未完全处理图像的相对目录。图像../maps与 .tex 文件相关，tex4ebook 命令留下了一个目录，该目录似乎是它用于创建最终压缩.epub文件的输出。在该目录中，它已经有一个maps位于正确位置的目录，但它尚未包含在最终文件中。因此，以下命令将文件夹添加到 epub 并修复了最终文件：

zip -ur mybook.epub maps

此后，图像在亚马逊预览器中看起来很好。

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