tex4ebook：.svg 图像可以通过 \includegraphics 正确调整大小，但不能通过 \includesvg 正确调整大小

Question

问题在于当前版本的 TeX4ht 配置文件svg.sty没有将尺寸参数传递给\includegraphics，因此图像以其原始大小显示。

这是一个更好的版本，它为构建正确的尺寸，\includegraphics并且还支持\svgpath。将此代码保存为svg.4ht：

% svg.4ht (2018-12-30-09:31), generated from tex4ht-4ht.tex
% Copyright 2018 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.
\immediate\write-1{version 2018-12-30-09:31}

\renewcommand\includesvg[2][]{%
  % get file name with \svgpath support
  \svg@get@path{#2}{}%
  % set keys
  \svg@local@param@set{#1}%
  \if@svg@file@found%
    % convert supported parameters from \includesvg for use with \includegraphics
    \edef\svg@tempb{}
    \ifdim\svg@param@height>\z@\relax%
      \edef\svg@tempb{\svg@tempb,height=\svg@param@height}%
    \fi%
    \ifdim\svg@param@width>\z@\relax%
      \edef\svg@tempb{\svg@tempb,width=\svg@param@width}%
    \fi%
    \ifdim\dimexpr\svg@param@angle\p@\relax=\z@\relax\else%
      \edef\svg@tempb{%
        \svg@tempb,origin=\svg@param@origin,angle=\svg@param@angle%
      }%
    \fi%
    \expandafter\includegraphics\expandafter[\svg@tempb]{\svg@file@base.\svg@file@ext}
  \else
    \typeout{SVG file #1 cannot be found}
  \fi
}

\Hinput{svg}
\endinput

它重新定义了\includesvg命令。它通过获得 SVG 文件名\svg@get@path。大多数代码\includegraphics使用来自的代码构建维度svg.sty。仅支持width、height和参数。 TeX4ht 版本支持直接包含 SVG 文件，因此无需执行任何其他操作。angle\includegraphics

以下是修改后的示例：

\documentclass{book}

\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{svg}
\graphicspath{{./images}}
\svgpath{{./images}}
\begin{document}

\begin{figure}[ht]
\centering
\caption{Image generated with includegraphics}
\label{fig:frogone}
\includegraphics[width=0.50\textwidth]{simplefrog.svg}
\end{figure}

\begin{figure}[ht]
\centering
\caption{Image generated with includesvg}
\label{fig:frogtwo}
\includesvg[width=0.50\textwidth]{simplefrog.svg}
\end{figure}

\end{document}

这是渲染后的 HTML 文件：

Answer 1

问题在于当前版本的 TeX4ht 配置文件svg.sty没有将尺寸参数传递给\includegraphics，因此图像以其原始大小显示。

这是一个更好的版本，它为构建正确的尺寸，\includegraphics并且还支持\svgpath。将此代码保存为svg.4ht：

% svg.4ht (2018-12-30-09:31), generated from tex4ht-4ht.tex
% Copyright 2018 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.
\immediate\write-1{version 2018-12-30-09:31}

\renewcommand\includesvg[2][]{%
  % get file name with \svgpath support
  \svg@get@path{#2}{}%
  % set keys
  \svg@local@param@set{#1}%
  \if@svg@file@found%
    % convert supported parameters from \includesvg for use with \includegraphics
    \edef\svg@tempb{}
    \ifdim\svg@param@height>\z@\relax%
      \edef\svg@tempb{\svg@tempb,height=\svg@param@height}%
    \fi%
    \ifdim\svg@param@width>\z@\relax%
      \edef\svg@tempb{\svg@tempb,width=\svg@param@width}%
    \fi%
    \ifdim\dimexpr\svg@param@angle\p@\relax=\z@\relax\else%
      \edef\svg@tempb{%
        \svg@tempb,origin=\svg@param@origin,angle=\svg@param@angle%
      }%
    \fi%
    \expandafter\includegraphics\expandafter[\svg@tempb]{\svg@file@base.\svg@file@ext}
  \else
    \typeout{SVG file #1 cannot be found}
  \fi
}

\Hinput{svg}
\endinput

它重新定义了\includesvg命令。它通过获得 SVG 文件名\svg@get@path。大多数代码\includegraphics使用来自的代码构建维度svg.sty。仅支持width、height和参数。 TeX4ht 版本支持直接包含 SVG 文件，因此无需执行任何其他操作。angle\includegraphics

以下是修改后的示例：

\documentclass{book}

\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{svg}
\graphicspath{{./images}}
\svgpath{{./images}}
\begin{document}

\begin{figure}[ht]
\centering
\caption{Image generated with includegraphics}
\label{fig:frogone}
\includegraphics[width=0.50\textwidth]{simplefrog.svg}
\end{figure}

\begin{figure}[ht]
\centering
\caption{Image generated with includesvg}
\label{fig:frogtwo}
\includesvg[width=0.50\textwidth]{simplefrog.svg}
\end{figure}

\end{document}

这是渲染后的 HTML 文件：

tex4ebook：.svg 图像可以通过 \includegraphics 正确调整大小，但不能通过 \includesvg 正确调整大小

答案1

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