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author | Norbert Preining <norbert@preining.info> | 2020-09-26 03:03:17 +0000 |
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committer | Norbert Preining <norbert@preining.info> | 2020-09-26 03:03:17 +0000 |
commit | 66ebd4914b367eb00a52ce5d5bb51f695101931b (patch) | |
tree | e5e4a5148bbf213f7ecc242d333bbde165d41e3b /macros/latex/contrib/fontspec/fontspec-doc-xetex.tex | |
parent | 56c9134f4aa02292ed17e726efd8e493b90e6011 (diff) |
CTAN sync 202009260303
Diffstat (limited to 'macros/latex/contrib/fontspec/fontspec-doc-xetex.tex')
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diff --git a/macros/latex/contrib/fontspec/fontspec-doc-xetex.tex b/macros/latex/contrib/fontspec/fontspec-doc-xetex.tex deleted file mode 100644 index 5c1e3e3e7d..0000000000 --- a/macros/latex/contrib/fontspec/fontspec-doc-xetex.tex +++ /dev/null @@ -1,294 +0,0 @@ -%%^^A%% fontspec-doc-xetex.tex -- part of FONTSPEC <wspr.io/fontspec> - -\documentclass[a4paper]{l3doc} -\usepackage{fontspec-doc-style} -\showexamplesfalse -\begin{document} - -\part{Fonts and features with \XeTeX} -\label{sec:xetex-features} - -\section{\XeTeX-only font features} - -The features described here are available for any font -selected by \pkg{fontspec}. - -\subsection{Mapping} -\label{sec:mapping} - -The \feat{Mapping} feature enables a \XeTeX\ text-mapping scheme, with an example shown in \exref{mapping}. - -\begin{Xexample}{mapping}{\XeTeX's \feat{Mapping} feature.} - \fontspec{texgyrepagella-regular.otf}[Mapping=tex-text] - ``!`A small amount of---text!'' -\end{Xexample} - -Only one mapping can be active at a time and a second call to \feat{Mapping} -will override the first. -Using the |tex-text| mapping is also equivalent to writing |Ligatures=TeX|. -The use of the latter syntax is recommended for better compatibility with -\LuaTeX\ documents. - - -\subsection{Different font technologies: \AAT, OpenType, and Graphite}\label{sec:renderer-xetex} - -\textbf{Note that from 2020 it appears that \XeTeX\ can no longer support \AAT\ fonts in \MacOSX.} - -\XeTeX\ supports three rendering technologies for typesetting, selected with -the \feat{Renderer} font feature. The first, \opt{AAT}, is -that provided only by \MacOSX. -The second, \opt{OpenType}, is an open source OpenType interpreter. -It provides greater support for OpenType features, notably contextual arrangement, over \opt{AAT}. -The third is \opt{Graphite}, which is an alternative to OpenType with particular features for less-common languages and the capability for more powerful font options. -Features for \opt{OpenType} have already been discussed in \vref{sec:opentype-features}; -\opt{Graphite} and \opt{AAT} features are discussed later in \vref{sec:graphite-features} and \vref{sec:aat-features}. - -Unless you have a particular need, the \feat{Renderer} feature is rarely explicitly required: for OpenType -fonts, the \opt{OpenType} renderer is used automatically, and for \AAT\ fonts, -\opt{AAT} is chosen by default. Some fonts, however, will contain font tables -for multiple rendering technologies, such as the Hiragino Japanese fonts -distributed with \MacOSX, and in these cases one over the other may be preferred. - -Among some other font features only available through a specific renderer, -\opt{OpenType} provides for the \feat{Script} and \feat{Language} features, which allow -different font behaviour for different alphabets and languages; see \vref{sec:ot} -for the description of these features. {\em Because these font features can -change which features are able to be selected for the font instance, they are selected -by \pkg{fontspec} before all others and will automatically and without warning -select the \opt{OpenType} renderer.} - - -\subsection{Optical font sizes} \label{sec:aat-opticalsize} - -Multiple Master fonts are parameterised over -orthogonal font axes, allowing continuous selection along such -features as weight, width, and optical size. -Whereas an OpenType font will have only a few separate -optical sizes, a Multiple Master font's optical size can be -specified over a continuous range. Unfortunately, this flexibility makes -it harder to create an automatic interface through \LaTeX, and the -optical size for a Multiple Master font must always be specified -explicitly. -\begin{Verbatim} - \fontspec{Minion MM Roman}[OpticalSize=11] - MM optical size test \\ - \fontspec{Minion MM Roman}[OpticalSize=47] - MM optical size test \\ - \fontspec{Minion MM Roman}[OpticalSize=71] - MM optical size test \\ -\end{Verbatim} - - -\subsection{Vertical typesetting} - -\XeTeX\ provides for vertical typesetting simply with the ability to rotate -the individual glyphs as a font is used for typesetting, as shown in -\exref{vert}. - -\begin{Xexample}[firstline=2]{vert}{Vertical typesetting.} - \def\verttext{共産主義者は} - \fontspec{Hiragino Mincho Pro} - \verttext - - \fontspec{Hiragino Mincho Pro}[Renderer=AAT,Vertical=RotatedGlyphs] - \rotatebox{-90}{\verttext}% requires the graphicx package -\end{Xexample} - -No actual provision is made for typesetting top-to-bottom -languages; for an example of how to do this, see the vertical Chinese -example provided in the \XeTeX\ documentation. - - -\section{The Graphite renderer} -\label{sec:graphite-features} - -Since the Graphite renderer is designed for less common scripts and languages, usually with -specific or unique requirements, Graphite features are not standard across fonts. - -Currently \pkg{fontspec} does not support a convenient interface to select Graphite font -features and all selection must be done via `raw' font feature selection. - -Here's an example: -\begin{Verbatim} - \fontspec{Charis SIL}[ - Renderer=Graphite, - RawFeature={Uppercase Eng alternates=Large eng on baseline}] - Ŋ -\end{Verbatim} - -Here's another: -\begin{Verbatim} -\fontspec{AwamiNastaliq-Regular.ttf}[Renderer=Graphite] ^^^^06b5 -\addfontfeature{RawFeature={Lam with V=V over bowl}} ^^^^06b5 -\end{Verbatim} - - - -\section{\MacOSX's \AAT\ fonts} -\label{sec:aat-features} - -\begin{quote}\itshape -\textbf{Warning!} -\XeTeX's implementation on \MacOSX\ is currently in a state of flux and the information contained below may well be wrong from 2013 onwards. -There is a good chance that the features described in this section will not be available any more as \XeTeX's completes its transition to a cross-platform--only application. -All examples in this section have now been removed. -\end{quote} - -\MacOSX's font technology began life before the ubiquitous-OpenType era -and revolved around the Apple-invented `\AAT' font format. This format -had some advantages (and other disadvantages) but it never became widely -popular in the font world. - -Nonetheless, this is the font format that was first supported by \XeTeX\ -(due to its pedigree on \MacOSX\ in the first place) and was the first -font format supported by \pkg{fontspec}. A number of fonts distributed with -\MacOSX\ are still in the \AAT\ format, such as `Skia'. - -\subsection{Ligatures} - -\feat{Ligatures} refer to the replacement of two separate characters -with a specially drawn glyph for functional or \ae sthetic reasons. -For \AAT\ fonts, you may choose from any combination of \opt{Required}, -\opt{Common}, \opt{Rare} (or \opt{Discretionary}), \opt{Logos}, \opt{Rebus}, -\opt{Diphthong}, \opt{Squared}, \opt{AbbrevSquared}, and \opt{Icelandic}. - -Some other Apple \AAT\ fonts have those `Rare' ligatures contained in -the \opt{Icelandic} feature. Notice also that the old \TeX\ trick of -splitting up a ligature with an empty brace pair does not work in -\XeTeX; you must use a 0\,pt kern or \cs{hbox} (\eg, \cs{null}) to -split the characters up if you do not want a ligature to be performed (the usual examples for when this might be desired are words like `shelf\null full'). - -\subsection{Letters} \label{sec:aat-letters} -The \opt{Letters} feature specifies how the letters in the current font -will look. For \AAT\ fonts, you may choose from \opt{Normal}, -\opt{Uppercase}, \opt{Lowercase}, \opt{SmallCaps}, and -\opt{InitialCaps}. - - -\subsection{Numbers} -The \feat{Numbers} feature defines how numbers will look in the -selected font. For \AAT\ fonts, they may be a -combination of \opt{Lining} or \opt{OldStyle} and \opt{Proportional} or -\opt{Monospaced} (the latter is good for tabular material). The synonyms -\opt{Uppercase} and \opt{Lowercase} are equivalent to \opt{Lining} and -\opt{OldStyle}, respectively. The differences have been shown previously -in \vref{sec:addfontfeatures}. - -\subsection{Contextuals} \label{sec:contextuals} -This feature refers to glyph substitution that vary by their position; -things like contextual swashes are implemented here. -The options for \AAT\ fonts are -\opt{WordInitial}, \opt{WordFinal} (\exref{wordcx}), \opt{LineInitial}, -\opt{LineFinal}, and \opt{Inner} (\exref{longsaat}, also called `non-final' sometimes). As -non-exclusive selectors, like the ligatures, you can turn them off -by prefixing their name with \opt{No}. - -\subsection{Vertical position} -The \feat{VerticalPosition} feature is used to access things like -subscript (\opt{Inferior}) and superscript (\opt{Superior}) numbers and -letters (and a small amount of punctuation, sometimes). -The \opt{Ordinal} option is (supposed to be) -contextually sensitive to only raise characters that appear directly -after a number. - -The \pkg{realscripts} package redefines the \cmd\textsubscript\ and -\cmd\textsuperscript\ commands to use the above font features, -including for use in footnote labels. - -\subsection{Fractions} -Many fonts come with the capability to typeset various forms of -fractional material. This is accessed in \pkg{fontspec} with the -\feat{Fractions} feature, which may be turned \opt{On} or \opt{Off} -in both \AAT\ and OpenType fonts. - -In \AAT\ fonts, the `fraction slash' or solidus character, is -to be used to create fractions. When \feat{Fractions} are turned -\opt{On}, then only pre-drawn fractions will be used. - -Using the \opt{Diagonal} option (\AAT\ only), the font will attempt -to create the fraction from superscript and subscript -characters. - -Some (Asian fonts predominantly) also provide for the -\opt{Alternate} feature. - -\subsection{Variants} -The \feat{Variant} feature takes a single numerical input for -choosing different alphabetic shapes. -See \vref{sec:newfeatures} for a way to assign names to variants, -which should be done on a per-font basis. - -\subsection{Alternates} -Selection of \feat{Alternate}s again must be done numerically. -See \vref{sec:newfeatures} for a way to assign names to alternates, -which should be done on a per-font basis. - - -\subsection{Style} -The options of the \feat{Style} feature -are defined in \AAT\ as one of the following: \opt{Display}, -\opt{Engraved}, \opt{IlluminatedCaps}, \opt{Italic}, -\opt{Ruby},\footnotemark\ \opt{TallCaps}, or \opt{Titling}. -\footnotetext{`Ruby' refers to a small optical size, used in -Japanese typography for annotations.} - -Typical examples for these features are shown in \ref{sec:ot-feat-style}. - -\subsection{CJK shape} -There have been many standards for how CJK ideographic -glyphs are `supposed' to look. Some fonts will contain many alternate -glyphs in order to be able to display these gylphs -correctly in whichever form is appropriate. Both \AAT\ and OpenType -fonts support the following \feat{CJKShape} options: -\opt{Traditional}, \opt{Simplified}, \opt{JIS1978}, \opt{JIS1983}, -\opt{JIS1990}, and \opt{Expert}. OpenType also supports the \opt{NLC} option. - -\subsection{Character width} -See \vref{sec:CharacterWidth} for relevant examples; the features are -the same between OpenType and \AAT\ fonts. -\AAT\ also allows \feat{CharacterWidth}|=|\opt{Default} to return to -the original font settings. - -\subsection{Diacritics} -Diacritics are marks, such as the acute accent or the tilde, applied to letters; they usually indicate a change in pronunciation. -In Arabic scripts, diacritics are used to indicate vowels. -You may either choose -to \opt{Show}, \opt{Hide} or \opt{Decompose} them in \AAT\ fonts. -The \opt{Hide} option is for scripts such as Arabic which may be -displayed either with or without vowel markings. E.g., -\verb|\fontspec[Diacritics=Hide]{...}| - -Some older fonts distributed with \MacOSX\ included `|O/|' \etc\ as shorthand for writing `\O' under the label of the \feat{Diacritics} feature. If you come across such fonts, you'll -want to turn this feature off (imagine typing |hello/goodbye| and -getting `hell\o goodbye' instead!) by decomposing the two characters -in the diacritic into the ones you actually -want. I recommend using -the proper \LaTeX\ input conventions for obtaining such characters -instead. - - -\subsection{Annotation} -Various Asian fonts are equipped with a more extensive range of -numbers and numerals in different forms. These are accessed through -the \feat{Annotation} feature with the following -options: \opt{Off}, -\opt{Box}, \opt{RoundedBox}, \opt{Circle}, \opt{BlackCircle}, -\opt{Parenthesis}, \opt{Period}, \opt{RomanNumerals}, \opt{Diamond}, -\opt{BlackSquare}, \opt{BlackRoundSquare}, and \opt{DoubleCircle}. - -\end{document} - -% /© -% ------------------------------------------------ -% The FONTSPEC package <wspr.io/fontspec> -% ------------------------------------------------ -% Copyright 2004-2020 Will Robertson, LPPL "maintainer" -% Copyright 2009-2015 Khaled Hosny -% Copyright 2013 Philipp Gesang -% Copyright 2013-2016 Joseph Wright -% ------------------------------------------------ -% This package is free software and may be redistributed and/or modified under -% the conditions of the LaTeX Project Public License, version 1.3c or higher -% (your choice): <http://www.latex-project.org/lppl/>. -% ------------------------------------------------ -% ©/ |