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diff --git a/doc/groff.html.node/Using-Fonts.html b/doc/groff.html.node/Using-Fonts.html new file mode 100644 index 0000000..81f48e6 --- /dev/null +++ b/doc/groff.html.node/Using-Fonts.html @@ -0,0 +1,148 @@ +<!DOCTYPE html> +<html> +<!-- Created by GNU Texinfo 7.0.3, https://www.gnu.org/software/texinfo/ --> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> +<!-- This manual documents GNU troff version 1.23.0. + +Copyright © 1994-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with no +Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A +copy of the license is included in the section entitled "GNU Free +Documentation License". --> +<title>Using Fonts (The GNU Troff Manual)</title> + +<meta name="description" content="Using Fonts (The GNU Troff Manual)"> +<meta name="keywords" content="Using Fonts (The GNU Troff Manual)"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta name="viewport" content="width=device-width,initial-scale=1"> + +<link href="index.html" rel="start" title="Top"> +<link href="Request-Index.html" rel="index" title="Request Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="GNU-troff-Reference.html" rel="up" title="GNU troff Reference"> +<link href="Manipulating-Type-Size-and-Vertical-Spacing.html" rel="next" title="Manipulating Type Size and Vertical Spacing"> +<link href="Page-Control.html" rel="prev" title="Page Control"> + + +</head> + +<body lang="en"> +<div class="section-level-extent" id="Using-Fonts"> +<div class="nav-panel"> +<p> +Next: <a href="Manipulating-Type-Size-and-Vertical-Spacing.html" accesskey="n" rel="next">Manipulating Type Size and Vertical Spacing</a>, Previous: <a href="Page-Control.html" accesskey="p" rel="prev">Page Control</a>, Up: <a href="GNU-troff-Reference.html" accesskey="u" rel="up">GNU <code class="code">troff</code> Reference</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Request-Index.html" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<h3 class="section" id="Using-Fonts-1">5.19 Using Fonts</h3> +<a class="index-entry-id" id="index-font"></a> + +<a class="index-entry-id" id="index-typeface"></a> +<a class="index-entry-id" id="index-font-family"></a> +<a class="index-entry-id" id="index-font-style"></a> +<a class="index-entry-id" id="index-style_002c-font"></a> +<a class="index-entry-id" id="index-family_002c-font"></a> +<a class="index-entry-id" id="index-text-font"></a> +<a class="index-entry-id" id="index-special-font"></a> +<a class="index-entry-id" id="index-unstyled-font"></a> +<a class="index-entry-id" id="index-font_002c-text"></a> +<a class="index-entry-id" id="index-font_002c-special"></a> +<a class="index-entry-id" id="index-font_002c-unstyled"></a> +<p>In digital typography, a <em class="dfn">font</em> is a collection of characters in a +specific typeface that a device can render as glyphs at a desired +size.<a class="footnote" id="DOCF72" href="groff.html_fot.html#FOOT72"><sup>72</sup></a> A <code class="code">roff</code> formatter can change typefaces at any +point in the text. The basic faces are a set of <em class="dfn">styles</em> combining +upright and slanted shapes with normal and heavy stroke weights: +‘<samp class="samp">R</samp>’, ‘<samp class="samp">I</samp>’, ‘<samp class="samp">B</samp>’, and ‘<samp class="samp">BI</samp>’—these stand for +<i class="slanted">roman</i>, <i class="slanted">italic</i>, <i class="slanted">bold</i>, and +<i class="slanted">bold-italic</i>. For linguistic text, GNU <code class="code">troff</code> groups +typefaces into <em class="dfn">families</em> containing each of these +styles.<a class="footnote" id="DOCF73" href="groff.html_fot.html#FOOT73"><sup>73</sup></a> A <em class="dfn">text font</em> is thus often a family +combined with a style, but it need not be: consider the <code class="code">ps</code> and +<code class="code">pdf</code> devices’ <code class="code">ZCMI</code> (Zapf Chancery Medium italic)—often, +no other style of Zapf Chancery Medium is provided. On typesetting +devices, at least one <em class="dfn">special font</em> is available, comprising +<em class="dfn">unstyled</em> glyphs for mathematical operators and other purposes. +</p> +<a class="index-entry-id" id="index-font-description-file"></a> +<a class="index-entry-id" id="index-description-file_002c-font"></a> +<a class="index-entry-id" id="index-file_002c-font-description"></a> +<a class="index-entry-id" id="index-font-metrics"></a> +<a class="index-entry-id" id="index-metrics_002c-font"></a> +<a class="index-entry-id" id="index-mounting-position"></a> +<a class="index-entry-id" id="index-mounting-position-1"></a> +<a class="index-entry-id" id="index-position_002c-mounting"></a> +<p>Like <abbr class="acronym">AT&T</abbr> <code class="code">troff</code>, GNU <code class="code">troff</code> does not itself load +or manipulate a digital font file;<a class="footnote" id="DOCF74" href="groff.html_fot.html#FOOT74"><sup>74</sup></a> instead it +works with a <em class="dfn">font description file</em> that characterizes it, +including its glyph repertoire and the <em class="dfn">metrics</em> (dimensions) of +each glyph.<a class="footnote" id="DOCF75" href="groff.html_fot.html#FOOT75"><sup>75</sup></a> This +information permits the formatter to accurately place glyphs with +respect to each other. Before using a font description, the formatter +associates it with a <em class="dfn">mounting position</em>, a place in an ordered list +of available typefaces. +<a class="index-entry-id" id="index-abstract-font-style"></a> +<a class="index-entry-id" id="index-font-style_002c-abstract"></a> +<a class="index-entry-id" id="index-style_002c-font_002c-abstract"></a> +So that a document need not be strongly coupled to a specific font +family, in GNU <code class="code">troff</code> an output device can associate a style in +the abstract sense with a mounting position. Thus the default family +can be combined with a style dynamically, producing a <em class="dfn">resolved font +name</em>. +</p> +<p>Fonts often have trademarked names, and even Free Software fonts can +require renaming upon modification. <code class="code">groff</code> maintains a +convention that a device’s serif font family is given the name ‘<samp class="samp">T</samp>’ +(“Times”), its sans-serif family ‘<samp class="samp">H</samp>’ (“Helvetica”), and its +monospaced family ‘<samp class="samp">C</samp>’ (“Courier”). Historical inertia has driven +<code class="code">groff</code>’s font identifiers to short uppercase abbreviations of font +names, as with ‘<samp class="samp">TR</samp>’, ‘<samp class="samp">TI</samp>’, ‘<samp class="samp">TB</samp>’, ‘<samp class="samp">TBI</samp>’, and a +special font ‘<samp class="samp">S</samp>’. +</p> +<p>The default family used with abstract styles can be changed at any time; +initially, it is ‘<samp class="samp">T</samp>’. Typically, abstract styles are arranged in +the first four mounting positions in the order shown above. The default +mounting position, and therefore style, is always ‘<samp class="samp">1</samp>’ (‘<samp class="samp">R</samp>’). +By issuing appropriate formatter instructions, you can override these +defaults before your document writes its first glyph. +</p> +<a class="index-entry-id" id="index-graphic-renditions"></a> +<a class="index-entry-id" id="index-renditions_002c-graphic"></a> +<a class="index-entry-id" id="index-character-cell-attributes"></a> +<a class="index-entry-id" id="index-attributes_002c-character-cell"></a> +<a class="index-entry-id" id="index-cell_002c-character_002c-attributes"></a> +<p>Terminal output devices cannot change font families and lack special +fonts. They support style changes by overstriking, or by altering +ISO 6429/ECMA-48 <em class="dfn">graphic renditions</em> (character cell +attributes). +</p> + + +<ul class="mini-toc"> +<li><a href="Selecting-Fonts.html" accesskey="1">Selecting Fonts</a></li> +<li><a href="Font-Families.html" accesskey="2">Font Families</a></li> +<li><a href="Font-Positions.html" accesskey="3">Font Positions</a></li> +<li><a href="Using-Symbols.html" accesskey="4">Using Symbols</a></li> +<li><a href="Character-Classes.html" accesskey="5">Character Classes</a></li> +<li><a href="Special-Fonts.html" accesskey="6">Special Fonts</a></li> +<li><a href="Artificial-Fonts.html" accesskey="7">Artificial Fonts</a></li> +<li><a href="Ligatures-and-Kerning.html" accesskey="8">Ligatures and Kerning</a></li> +<li><a href="Italic-Corrections.html" accesskey="9">Italic Corrections</a></li> +<li><a href="Dummy-Characters.html">Dummy Characters</a></li> +</ul> +</div> +<hr> +<div class="nav-panel"> +<p> +Next: <a href="Manipulating-Type-Size-and-Vertical-Spacing.html">Manipulating Type Size and Vertical Spacing</a>, Previous: <a href="Page-Control.html">Page Control</a>, Up: <a href="GNU-troff-Reference.html">GNU <code class="code">troff</code> Reference</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Request-Index.html" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |