% [![Build Status](https://travis-ci.org/michal-h21/tex4ebook.svg?branch=master)](https://travis-ci.org/michal-h21/tex4ebook) # Introduction `TeX4ebook` is a tool for conversion from \LaTeX\ to ebook formats, such as EPUB, MOBI and EPUB 3. It is based on `TeX4ht`^[https://tug.org/tex4ht/], which provides instructions for the actual \LaTeX\ to HTML conversion, and on `make4ht`^[https://ctan.org/pkg/make4ht?lang=en]. The conversion is focused on the logical structure of the converted document and metadata. Basic visual appearance is preserved as well, but you should use custom configurations if you want to make the document more visually appealing. You can include custom `CSS` or fonts in a configuration file. `TeX4ebook` supports the same features as `make4ht`, in particular build files and extensions. These may be used for post-processing of the generated HTML files, or to configure the image conversion. See the `make4ht` documentation to see the supported features. ## License Permission is granted to copy, distribute and/or modify this software under the terms of the LaTeX Project Public License, version 1.3. # Usage Run on the command line: tex4ebook [options] filename You don't have to modify your source files unless you want to use commands defined by `tex4ebook` in the document, or when your document uses a package which causes a compilation error. If you want to use `tex4ebook` commands, add this line to your document preamble: \usepackage{tex4ebook} But it is optional. You shouldn't need to modify your \TeX\ files ## Available commands - `\coverimage[]{coverimage.name}` -- include cover image to the document. You can pass the same options as to `\includegraphics` command in the optional argument. For example: \thispagestyle{empty} \begin{document} \coverimage[scale=0.8]{coverimage.name} % include scaled cover image ... \pagestyle{headings} - `\epubpage` -- add page break to the document. # Command line options `-a,--loglevel` : Set message log level. Possible values: debug, info, status, warning, error, fatal. Default: status. `-c,--config` : specify custom config file for `TeX4ht` **example config file**: File `sample.cfg` \Preamble{xhtml} \CutAt{section} \begin{document} \EndPreamble run tex4ebook -c sample filename.tex This config file will create `xhtml` file for every section. Note that this behaviour is default. `-e,--build-file (default nil)` : Specify make4ht build file^[https://github.com/michal-h21/make4ht#build-file]. Default build file filename is `filename.mk4`, use this option if you use different filename. `-f,--format (default epub)` : Output format. Possible values are `epub`, `epub3`, `mobi`, `azw` and `azw3`. `-j,--jobname` : Specify the output file name, without file extension. `-l,--lua` : Use LuaLaTeX as TeX engine. `-m,--mode (default default)` : This set `mode` variable, accessible in the build file. Default supported values are `default` and `draft`. In `draft` mode, document is compiled only once, instead of three times. `-s,--shell-escape` : Enable shell escape in the `htlatex` run. This is necessary for the execution of the external commands from your source files. `-t,--tidy` : clean-up output HTML files using the `HTML tidy` command^[if it is available on your system]. `-x,--xetex` : Use xelatex for document compilation `-v,--version` : Print the version number. # Configuration `TeX4ebook` uses `TeX4ht`^[http://www.tug.org/tex4ht/] for conversion from LaTeX to html. `TeX4ht` is highly configurable using config files. Basic config file structure is \Preamble{xhtml, comma separated list of options} ... \begin{document} ... \EndPreamble Basic info about command configurations can be found in a work-in-progres *TeX4ht tutorial*^[https://github.com/michal-h21/helpers4ht/wiki/tex4ht-tutorial], *TeX4ht documentation*^[http://www.tug.org/applications/tex4ht/mn11.html], and in series of blogposts on CV Radhakrishnan's blog: *Configure part 1*^[https://web.archive.org/web/20180908234227/http://www.cvr.cc/?p=323], *Configure part 2*^[https://web.archive.org/web/20180908201057/http://www.cvr.cc/?p=362], *Low level commands*^[https://web.archive.org/web/20180909101325/http://cvr.cc/?p=482]. Available options for `\Preamble` command are listed in the article *TeX4ht: options*^[https://web.archive.org/web/20180813043722/http://cvr.cc/?p=504]. *Comparison of tex4ebook and Pandoc output*^[https://github.com/richelbilderbeek/travis_tex_to_epub_example_1] A great source of tips for `TeX4ht` configuration is *tex4ht tag on TeX.sx*^[http://tex.stackexchange.com/questions/tagged/tex4ht]. There is also a *tag for tex4ebook*^[http://tex.stackexchange.com/questions/tagged/tex4ebook]. Examples of interesting questions are *including images and fonts in ebooks*^[http://tex.stackexchange.com/a/213165/2891] or *setting image size in em units instead of pt*^[http://tex.stackexchange.com/a/195718/2891]. ## Provided configurations `tex4ebook` provides some configurations for your usage: \Configure{UniqueIdentifier}{identifier} Every EPUB file should have unique identifier, like ISBN, DOI, URI etc. Default identifier is URI, with value `http://example.com/\jobname`. \Configure{@author}{\let\footnote\@gobble} Local definitions of commands used in the `\author` command. As contents of `\author` are used in XML files, it is necessary to strip away any information which don't belongs here, such as `\footnote`. \Configure{OpfScheme}{URI} Type of unique identifier, default type is URI. It is used only in the EPUB format, it is deprecated for EPUB 3. \Configure{resettoclevels}{list of section types in descending order} Configure section types which should be included in the `NCX` file. Default value is the whole document hierarchy, from `\part` to `\paragraph`. \Configure{DocumentLanguage}{language code} Each EPUB file must declare the document language. It is inferred from `babel` main language by default, but you can configure it when it doesn't work correctly. The `language code` should be in [ISO 639-1](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) form. \Configure{CoverImage}{before cover image}{after cover image} By default, cover image is inserted in `
` element, you may use this configuration option to insert different markup, or even to place the cover image to standalone page. \Configure{CoverMimeType}{mime type of cover image} Default value is `image/png`, change this value if you use other image type than `png`. If you don't want to include the cover image in the document, use command \CoverMetadata{filename} in the config file. \Configure{OpfMetadata}{item element} Add item to `` section in the `OPF` file. \Configure{OpfManifest}{maifest element} Add item to `` section in the `OPF` file. \Configure{xmlns}{prefix}{uri} Add `XML` name space to the generated `XHTML` files. Useful in `EPUB 3`. ### Example config file \Preamble{xhtml} \begin{document} \Configure{DocumentLanguage}{de} % Use following lines if your document has ISBN: % \Configure{OpfScheme}{ISBN} % \Configure{UniqueIdentifier}{3-0000-1111-X} % Another possibility is URI that points for example to the ebook homepage: \Configure{OpfScheme}{URI} \Configure{UniqueIdentifier} {https://de.wikipedia.org/wiki/Der_achte_Schöpfungstag} \Configure{CoverMimeType}{image/jpeg} % If you don't use \coverimage in the document text, % add cover image using this command: \CoverMetadata{coverimage.jpg} % You can also add more authors to your ebook metadata: \Configure{OpfMetadata} {\HCode{Deutscher Bücherbund}} \Configure{OpfMetadata} {\HCode{Image Artist}} \Configure{OpfMetadata} {\HCode{Trans Lator}} \Configure{OpfMetadata} {\HCode{1888}} \EndPreamble Remarks: - Leading percent signs in the `.cfg` file introduce comments - If the unique identifier is a URI which contains diacritical characters, the equivalent HTML code needs to be inserted. `UTF8` is not recognized at that place. - `UTF8` characters may be used in the `OpfMetadata` sections. ## \TeX4ht options \TeX4ht supports lot of options, that change produced HTML code without need to use configurations. Their list is available in the [\TeX4ht documentation](https://www.kodymirus.cz/tex4ht-doc/texfourhtOptions.html). You can pass options to `tex4ebook` in the argument that follows filename: tex4ebook filename.tex "option1,option2" Alternatively, they can be put in the `\Preamble` command in the config file: \Preamble{xhtml,option1,option2} ### Options provided by `tex4ebook` `no-cut` : By default `tex4ebook` splits document to separate HTML pages on `\chapter` command when it is available. Othervise, it splits on `\section`. This can be changed using the `\CutAt` command or numeric options, but you need to use the `no-cut` option to prevent fatal error. ## Commands available in the config file `\OpfRegisterFile[filename]` : register file in the `OPF` file. Current output file is added by default. `\OpfAddProperty{property type}` : add `EPUB3` property for the current file. See *EPUB3 spec*^[http://www.idpf.org/epub/301/spec/epub-publications.html#sec-item-property-values] `\OpfGuide[filename]{title}{type}` : Add file to the `` section in the `OPF` file. See *Where do you start an ePUB and what is the `` section of the `.OPF` file?*^[http://epubsecrets.com/where-do-you-start-an-epub-and-what-is-the-guide-section-of-the-opf-file.php] for some details. Note that `` is deprecated in `EPUB 3`. ## Build files `tex4ebook` uses `make4ht`^[https://github.com/michal-h21/make4ht] as a build system. It provides support for build files written in Lua. These build files can be used to call additional commands, like Bib\TeX\ or Makeindex, post-process generated HTML files, change the way how images are created, or to modify parameters of the conversion. Sample build file can look like this: if mode=="draft" then Make:htlatex {} else Make:htlatex {} Make:htlatex {} Make:htlatex {} end Make:image("png$", "dvipng -bg Transparent -T tight -o ${output} -D 170 -pp ${page} ${source}") The `mode` variable holds value of the `--mode` argument to `tex4ebook`. The `draft` mode is used for faster compilation, it calls LaTeX only once. The `Make:image` function can configure handling of images created by extraction from the DVI file. It can be complex math, TikZ or PSTricks pictures, and so on. The `${}` placeholders are filled by `tex4ebook` with parameters like current page number of the image DVI file, or output image name. You can compile your document with a build file using the `-e` option: tex4ebook -m draft -e build.lua filename.tex See `make4ht` documentation for more details on configuration files. ## `.tex4ebook` configuration file `tex4ebook` supports a default build file, which is loaded automatically without need to use the `-e` option. ### Location The configuration file can be saved either in `$HOME/.config/tex4ebook/config.lua` or in `.tex4ebook` in the current directory or it's parents (up to `$HOME`). See the `make4ht` documentation for an example and more information. # Troubleshooting ## Kindle formats `tex4ebook` uses `kindlegen` command for the conversion to Kindle formats (`mobi`, `azw` and `azw3`). Unfortunatelly, Amazon discontinued this command, so we use also `ebook-convert` provided by Calibre if `kindlegen` fails. ## Fixed layout EPUB The basic support for the Fixed layout EPUB 3 can be enabled using the following configurations: \Configure{OpfMetadata} {\HCode{pre-paginated}} \Configure{OpfMetadata} {\HCode{landscape}} \Configure{OpfMetadata} {\HCode{none}} \Configure{@HEAD} {\HCode{\Hnewline}} Modify the dimensions in the `