680 lines
31 KiB
Plaintext
680 lines
31 KiB
Plaintext
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V3.1//EN" [
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<!ENTITY version SYSTEM "version.sgml">
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<!ENTITY confdir SYSTEM "confdir.sgml">
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]>
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<!--
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Copyright © 2003 Keith Packard
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation, and that the name of Keith Packard not be used in
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advertising or publicity pertaining to distribution of the software without
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specific, written prior permission. Keith Packard makes no
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representations about the suitability of this software for any purpose. It
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is provided "as is" without express or implied warranty.
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KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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-->
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<refentry>
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<refmeta>
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<refentrytitle>fonts-conf</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>fonts.conf</refname>
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<refpurpose>Font configuration files</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<synopsis>
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&confdir;/fonts.conf
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&confdir;/fonts.dtd
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&confdir;/conf.d
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~/.fonts.conf
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</synopsis>
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</refsynopsisdiv>
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<refsect1><title>Description</title>
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<para>
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Fontconfig is a library designed to provide system-wide font configuration,
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customization and application access.
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</para>
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</refsect1>
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<refsect1><title>Functional Overview</title>
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<para>
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Fontconfig contains two essential modules, the configuration module which
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builds an internal configuration from XML files and the matching module
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which accepts font patterns and returns the nearest matching font.
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</para>
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<refsect2><title>Font Configuration</title>
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<para>
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The configuration module consists of the FcConfig datatype, libexpat and
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FcConfigParse which walks over an XML tree and amends a configuration with
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data found within. From an external perspective, configuration of the
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library consists of generating a valid XML tree and feeding that to
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FcConfigParse. The only other mechanism provided to applications for
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changing the running configuration is to add fonts and directories to the
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list of application-provided font files.
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</para><para>
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The intent is to make font configurations relatively static, and shared by
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as many applications as possible. It is hoped that this will lead to more
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stable font selection when passing names from one application to another.
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XML was chosen as a configuration file format because it provides a format
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which is easy for external agents to edit while retaining the correct
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structure and syntax.
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</para><para>
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Font configuration is separate from font matching; applications needing to
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do their own matching can access the available fonts from the library and
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perform private matching. The intent is to permit applications to pick and
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choose appropriate functionality from the library instead of forcing them to
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choose between this library and a private configuration mechanism. The hope
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is that this will ensure that configuration of fonts for all applications
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can be centralized in one place. Centralizing font configuration will
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simplify and regularize font installation and customization.
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</para>
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</refsect2>
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<refsect2>
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<title>Font Properties</title>
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<para>
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While font patterns may contain essentially any properties, there are some
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well known properties with associated types. Fontconfig uses some of these
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properties for font matching and font completion. Others are provided as a
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convenience for the applications' rendering mechanism.
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</para>
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<programlisting>
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Property Type Description
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--------------------------------------------------------------
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family String Font family names
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familylang String Languages corresponding to each family
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style String Font style. Overrides weight and slant
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stylelang String Languages corresponding to each style
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fullname String Font full names (often includes style)
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fullnamelang String Languages corresponding to each fullname
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slant Int Italic, oblique or roman
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weight Int Light, medium, demibold, bold or black
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size Double Point size
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width Int Condensed, normal or expanded
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aspect Double Stretches glyphs horizontally before hinting
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pixelsize Double Pixel size
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spacing Int Proportional, dual-width, monospace or charcell
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foundry String Font foundry name
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antialias Bool Whether glyphs can be antialiased
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hinting Bool Whether the rasterizer should use hinting
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hintstyle Int Automatic hinting style
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verticallayout Bool Use vertical layout
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autohint Bool Use autohinter instead of normal hinter
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globaladvance Bool Use font global advance data
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file String The filename holding the font
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index Int The index of the font within the file
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ftface FT_Face Use the specified FreeType face object
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rasterizer String Which rasterizer is in use
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outline Bool Whether the glyphs are outlines
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scalable Bool Whether glyphs can be scaled
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scale Double Scale factor for point->pixel conversions
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dpi Double Target dots per inch
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rgba Int unknown, rgb, bgr, vrgb, vbgr,
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none - subpixel geometry
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minspace Bool Eliminate leading from line spacing
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charset CharSet Unicode chars encoded by the font
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lang String List of RFC-3066-style languages this
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font supports
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fontversion Int Version number of the font
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capability String List of layout capabilities in the font
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embolden Bool Rasterizer should synthetically embolden the font
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</programlisting>
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</refsect2>
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<refsect2>
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<title>Font Matching</title>
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<para>
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Fontconfig performs matching by measuring the distance from a provided
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pattern to all of the available fonts in the system. The closest matching
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font is selected. This ensures that a font will always be returned, but
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doesn't ensure that it is anything like the requested pattern.
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</para><para>
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Font matching starts with an application constructed pattern. The desired
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attributes of the resulting font are collected together in a pattern. Each
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property of the pattern can contain one or more values; these are listed in
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priority order; matches earlier in the list are considered "closer" than
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matches later in the list.
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</para><para>
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The initial pattern is modified by applying the list of editing instructions
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specific to patterns found in the configuration; each consists of a match
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predicate and a set of editing operations. They are executed in the order
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they appeared in the configuration. Each match causes the associated
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sequence of editing operations to be applied.
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</para><para>
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After the pattern has been edited, a sequence of default substitutions are
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performed to canonicalize the set of available properties; this avoids the
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need for the lower layers to constantly provide default values for various
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font properties during rendering.
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</para><para>
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The canonical font pattern is finally matched against all available fonts.
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The distance from the pattern to the font is measured for each of several
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properties: foundry, charset, family, lang, spacing, pixelsize, style,
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slant, weight, antialias, rasterizer and outline. This list is in priority
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order -- results of comparing earlier elements of this list weigh more
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heavily than later elements.
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</para><para>
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There is one special case to this rule; family names are split into two
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bindings; strong and weak. Strong family names are given greater precedence
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in the match than lang elements while weak family names are given lower
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precedence than lang elements. This permits the document language to drive
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font selection when any document specified font is unavailable.
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</para><para>
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The pattern representing that font is augmented to include any properties
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found in the pattern but not found in the font itself; this permits the
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application to pass rendering instructions or any other data through the
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matching system. Finally, the list of editing instructions specific to
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fonts found in the configuration are applied to the pattern. This modified
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pattern is returned to the application.
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</para><para>
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The return value contains sufficient information to locate and rasterize the
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font, including the file name, pixel size and other rendering data. As
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none of the information involved pertains to the FreeType library,
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applications are free to use any rasterization engine or even to take
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the identified font file and access it directly.
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</para><para>
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The match/edit sequences in the configuration are performed in two passes
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because there are essentially two different operations necessary -- the
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first is to modify how fonts are selected; aliasing families and adding
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suitable defaults. The second is to modify how the selected fonts are
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rasterized. Those must apply to the selected font, not the original pattern
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as false matches will often occur.
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</para>
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</refsect2>
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<refsect2><title>Font Names</title>
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<para>
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Fontconfig provides a textual representation for patterns that the library
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can both accept and generate. The representation is in three parts, first a
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list of family names, second a list of point sizes and finally a list of
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additional properties:
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</para>
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<programlisting>
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<families>-<point sizes>:<name1>=<values1>:<name2>=<values2>...
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</programlisting>
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<para>
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Values in a list are separated with commas. The name needn't include either
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families or point sizes; they can be elided. In addition, there are
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symbolic constants that simultaneously indicate both a name and a value.
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Here are some examples:
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</para>
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<programlisting>
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Name Meaning
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----------------------------------------------------------
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Times-12 12 point Times Roman
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Times-12:bold 12 point Times Bold
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Courier:italic Courier Italic in the default size
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Monospace:matrix=1 .1 0 1 The users preferred monospace font
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with artificial obliquing
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</programlisting>
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<para>
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The '\', '-', ':' and ',' characters in family names must be preceeded by a
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'\' character to avoid having them misinterpreted. Similarly, values
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containing '\', '=', '_', ':' and ',' must also have them preceeded by a
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'\' character. The '\' characters are stripped out of the family name and
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values as the font name is read.
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</para>
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</refsect2>
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</refsect1>
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<refsect1><title>Debugging Applications</title>
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<para>
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To help diagnose font and applications problems, fontconfig is built with a
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large amount of internal debugging left enabled. It is controlled by means
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of the FC_DEBUG environment variable. The value of this variable is
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interpreted as a number, and each bit within that value controls different
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debugging messages.
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</para>
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<programlisting>
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Name Value Meaning
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---------------------------------------------------------
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MATCH 1 Brief information about font matching
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MATCHV 2 Extensive font matching information
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EDIT 4 Monitor match/test/edit execution
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FONTSET 8 Track loading of font information at startup
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CACHE 16 Watch cache files being written
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CACHEV 32 Extensive cache file writing information
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PARSE 64 (no longer in use)
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SCAN 128 Watch font files being scanned to build caches
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SCANV 256 Verbose font file scanning information
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MEMORY 512 Monitor fontconfig memory usage
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CONFIG 1024 Monitor which config files are loaded
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LANGSET 2048 Dump char sets used to construct lang values
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OBJTYPES 4096 Display message when value typechecks fail
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</programlisting>
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<para>
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Add the value of the desired debug levels together and assign that (in
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base 10) to the FC_DEBUG environment variable before running the
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application. Output from these statements is sent to stdout.
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</para>
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</refsect1>
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<refsect1><title>Lang Tags</title>
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<para>
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Each font in the database contains a list of languages it supports. This is
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computed by comparing the Unicode coverage of the font with the orthography
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of each language. Languages are tagged using an RFC-3066 compatible naming
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and occur in two parts -- the ISO 639 language tag followed a hyphen and then
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by the ISO 3166 country code. The hyphen and country code may be elided.
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</para><para>
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Fontconfig has orthographies for several languages built into the library.
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No provision has been made for adding new ones aside from rebuilding the
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library. It currently supports 122 of the 139 languages named in ISO 639-1,
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141 of the languages with two-letter codes from ISO 639-2 and another 30
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languages with only three-letter codes. Languages with both two and three
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letter codes are provided with only the two letter code.
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</para><para>
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For languages used in multiple territories with radically different
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character sets, fontconfig includes per-territory orthographies. This
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includes Azerbaijani, Kurdish, Pashto, Tigrinya and Chinese.
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</para>
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</refsect1>
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<refsect1><title>Configuration File Format</title>
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<para>
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Configuration files for fontconfig are stored in XML format; this
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format makes external configuration tools easier to write and ensures that
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they will generate syntactically correct configuration files. As XML
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files are plain text, they can also be manipulated by the expert user using
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a text editor.
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</para><para>
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The fontconfig document type definition resides in the external entity
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"fonts.dtd"; this is normally stored in the default font configuration
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directory (&confdir;). Each configuration file should contain the
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following structure:
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<programlisting>
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<?xml version="1.0"?>
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<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
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<fontconfig>
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...
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</fontconfig>
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</programlisting>
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</para>
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<refsect2><title><literal><fontconfig></literal></title><para>
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This is the top level element for a font configuration and can contain
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<sgmltag>dir</>, <sgmltag>cache</>, <sgmltag>include</>, <sgmltag>match</> and <sgmltag>alias</> elements in any order.
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</para></refsect2>
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<refsect2><title><sgmltag>dir</></title><para>
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This element contains a directory name which will be scanned for font files
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to include in the set of available fonts.
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</para></refsect2>
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<refsect2><title><sgmltag>cache</></title><para>
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This element contains a file name for the per-user cache of font
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information. If it starts with '~', it refers to a file in the users
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home directory. This file is used to hold information about fonts that
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isn't present in the per-directory cache files. It is automatically
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maintained by the fontconfig library. The default for this file
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is ``~/.fonts.cache-<sgmltag>version</>'', where <sgmltag>version</> is the font configuration
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file version number (currently 2).
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</para></refsect2>
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<refsect2><title><sgmltag>include ignore_missing="no"</></title><para>
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This element contains the name of an additional configuration file or
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directory. If a directory, every file within that directory starting with an
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ASCII digit (U+0030 - U+0039) and ending with the string ``.conf'' will be processed in sorted order. When
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the XML datatype is traversed by FcConfigParse, the contents of the file(s)
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will also be incorporated into the configuration by passing the filename(s) to
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FcConfigLoadAndParse. If 'ignore_missing' is set to "yes" instead of the
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default "no", a missing file or directory will elicit no warning message from
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the library.
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</para></refsect2>
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<refsect2><title><sgmltag>config</></title><para>
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This element provides a place to consolidate additional configuration
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information. <sgmltag>config</> can contain <sgmltag>blank</> and <sgmltag>rescan</> elements in any
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order.
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</para></refsect2>
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<refsect2><title><sgmltag>blank</></title><para>
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Fonts often include "broken" glyphs which appear in the encoding but are
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drawn as blanks on the screen. Within the <sgmltag>blank</> element, place each
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Unicode characters which is supposed to be blank in an <sgmltag>int</> element.
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Characters outside of this set which are drawn as blank will be elided from
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the set of characters supported by the font.
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</para></refsect2>
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<refsect2><title><sgmltag>rescan</></title><para>
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The <sgmltag>rescan</> element holds an <sgmltag>int</> element which indicates the default
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interval between automatic checks for font configuration changes.
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Fontconfig will validate all of the configuration files and directories and
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automatically rebuild the internal datastructures when this interval passes.
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</para></refsect2>
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<refsect2><title><sgmltag>selectfont</></title><para>
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This element is used to black/white list fonts from being listed or matched
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against. It holds acceptfont and rejectfont elements.
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</para></refsect2>
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<refsect2><title><sgmltag>acceptfont</></title><para>
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Fonts matched by an acceptfont element are "whitelisted"; such fonts are
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explicitly included in the set of fonts used to resolve list and match
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requests; including them in this list protects them from being "blacklisted"
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by a rejectfont element. Acceptfont elements include glob and pattern
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elements which are used to match fonts.
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</para></refsect2>
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<refsect2><title><sgmltag>rejectfont</></title><para>
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Fonts matched by an rejectfont element are "blacklisted"; such fonts are
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excluded from the set of fonts used to resolve list and match requests as if
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they didn't exist in the system. Rejectfont elements include glob and
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pattern elements which are used to match fonts.
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</para></refsect2>
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<refsect2><title><sgmltag>glob</></title><para>
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Glob elements hold shell-style filename matching patterns (including ? and
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*) which match fonts based on their complete pathnames. This can be used to
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exclude a set of directories (/usr/share/fonts/uglyfont*), or particular
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font file types (*.pcf.gz), but the latter mechanism relies rather heavily
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on filenaming conventions which can't be relied upon. Note that globs
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only apply to directories, not to individual fonts.
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</para></refsect2>
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<refsect2><title><sgmltag>pattern</></title><para>
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Pattern elements perform list-style matching on incoming fonts; that is,
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they hold a list of elements and associated values. If all of those
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elements have a matching value, then the pattern matches the font. This can
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be used to select fonts based on attributes of the font (scalable, bold,
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etc), which is a more reliable mechanism than using file extensions.
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Pattern elements include patelt elements.
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</para></refsect2>
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<refsect2><title><sgmltag>patelt name="property"</></title><para>
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Patelt elements hold a single pattern element and list of values. They must
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have a 'name' attribute which indicates the pattern element name. Patelt
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elements include int, double, string, matrix, bool, charset and const
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elements.
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</para></refsect2>
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<refsect2><title><sgmltag>match target="pattern"</></title><para>
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This element holds first a (possibly empty) list of <sgmltag>test</> elements and then
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a (possibly empty) list of <sgmltag>edit</> elements. Patterns which match all of the
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tests are subjected to all the edits. If 'target' is set to "font" instead
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of the default "pattern", then this element applies to the font name
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resulting from a match rather than a font pattern to be matched.
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</para></refsect2>
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<refsect2><title><sgmltag>test qual="any" name="property" target="default" compare="eq"</></title><para>
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This element contains a single value which is compared with the target
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('pattern', 'font' or 'default') property "property" (substitute any of the property names seen
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above). 'compare' can be one of "eq", "not_eq", "less", "less_eq", "more", or
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"more_eq". 'qual' may either be the default, "any", in which case the match
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succeeds if any value associated with the property matches the test value, or
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"all", in which case all of the values associated with the property must
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match the test value. When used in a <match target="font"> element,
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the target= attribute in the <test> element selects between matching
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the original pattern or the font. "default" selects whichever target the
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outer <match> element has selected.
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</para></refsect2>
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<refsect2><title><sgmltag>edit name="property" mode="assign" binding="weak"</></title><para>
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This element contains a list of expression elements (any of the value or
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operator elements). The expression elements are evaluated at run-time and
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modify the property "property". The modification depends on whether
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"property" was matched by one of the associated <sgmltag>test</> elements, if so, the
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modification may affect the first matched value. Any values inserted into
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the property are given the indicated binding ("strong", "weak" or "same")
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with "same" binding using the value from the matched pattern element.
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'mode' is one of:
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<programlisting>
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Mode With Match Without Match
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---------------------------------------------------------------------
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"assign" Replace matching value Replace all values
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"assign_replace" Replace all values Replace all values
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"prepend" Insert before matching Insert at head of list
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"prepend_first" Insert at head of list Insert at head of list
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"append" Append after matching Append at end of list
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"append_last" Append at end of list Append at end of list
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</programlisting>
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</para></refsect2>
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<refsect2><title><sgmltag>int</>, <sgmltag>double</>, <sgmltag>string</>, <sgmltag>bool</></title><para>
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These elements hold a single value of the indicated type. <sgmltag>bool</>
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elements hold either true or false. An important limitation exists in
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the parsing of floating point numbers -- fontconfig requires that
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the mantissa start with a digit, not a decimal point, so insert a leading
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zero for purely fractional values (e.g. use 0.5 instead of .5 and -0.5
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instead of -.5).
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</para></refsect2>
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<refsect2><title><sgmltag>matrix</></title><para>
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This element holds the four <sgmltag>double</> elements of an affine
|
|
transformation.
|
|
</para></refsect2>
|
|
<refsect2><title><sgmltag>name</></title><para>
|
|
Holds a property name. Evaluates to the first value from the property of
|
|
the font, not the pattern.
|
|
</para></refsect2>
|
|
<refsect2><title><sgmltag>const</></title><para>
|
|
Holds the name of a constant; these are always integers and serve as
|
|
symbolic names for common font values:
|
|
<programlisting>
|
|
Constant Property Value
|
|
-------------------------------------
|
|
thin weight 0
|
|
extralight weight 40
|
|
ultralight weight 40
|
|
light weight 50
|
|
book weight 75
|
|
regular weight 80
|
|
normal weight 80
|
|
medium weight 100
|
|
demibold weight 180
|
|
semibold weight 180
|
|
bold weight 200
|
|
extrabold weight 205
|
|
black weight 210
|
|
heavy weight 210
|
|
roman slant 0
|
|
italic slant 100
|
|
oblique slant 110
|
|
ultracondensed width 50
|
|
extracondensed width 63
|
|
condensed width 75
|
|
semicondensed width 87
|
|
normal width 100
|
|
semiexpanded width 113
|
|
expanded width 125
|
|
extraexpanded width 150
|
|
ultraexpanded width 200
|
|
proportional spacing 0
|
|
dual spacing 90
|
|
mono spacing 100
|
|
charcell spacing 110
|
|
unknown rgba 0
|
|
rgb rgba 1
|
|
bgr rgba 2
|
|
vrgb rgba 3
|
|
vbgr rgba 4
|
|
none rgba 5
|
|
hintnone hintstyle 0
|
|
hintslight hintstyle 1
|
|
hintmedium hintstyle 2
|
|
hintfull hintstyle 3
|
|
</programlisting>
|
|
</para>
|
|
</refsect2>
|
|
<refsect2>
|
|
<title><sgmltag>or</>, <sgmltag>and</>, <sgmltag>plus</>, <sgmltag>minus</>, <sgmltag>times</>, <sgmltag>divide</></title>
|
|
<para>
|
|
These elements perform the specified operation on a list of expression
|
|
elements. <sgmltag>or</> and <sgmltag>and</> are boolean, not bitwise.
|
|
</para>
|
|
</refsect2>
|
|
<refsect2>
|
|
<title><sgmltag>eq</>, <sgmltag>not_eq</>, <sgmltag>less</>, <sgmltag>less_eq</>, <sgmltag>more</>, <sgmltag>more_eq</></title>
|
|
<para>
|
|
These elements compare two values, producing a boolean result.
|
|
</para></refsect2>
|
|
<refsect2><title><sgmltag>not</></title><para>
|
|
Inverts the boolean sense of its one expression element
|
|
</para></refsect2>
|
|
<refsect2><title><sgmltag>if</></title><para>
|
|
This element takes three expression elements; if the value of the first is
|
|
true, it produces the value of the second, otherwise it produces the value
|
|
of the third.
|
|
</para></refsect2>
|
|
<refsect2><title><sgmltag>alias</></title><para>
|
|
Alias elements provide a shorthand notation for the set of common match
|
|
operations needed to substitute one font family for another. They contain a
|
|
<sgmltag>family</> element followed by optional <sgmltag>prefer</>, <sgmltag>accept</> and <sgmltag>default</>
|
|
elements. Fonts matching the <sgmltag>family</> element are edited to prepend the
|
|
list of <sgmltag>prefer</>ed families before the matching <sgmltag>family</>, append the
|
|
<sgmltag>accept</>able families after the matching <sgmltag>family</> and append the <sgmltag>default</>
|
|
families to the end of the family list.
|
|
</para></refsect2>
|
|
<refsect2><title><sgmltag>family</></title><para>
|
|
Holds a single font family name
|
|
</para></refsect2>
|
|
<refsect2><title><sgmltag>prefer</>, <sgmltag>accept</>, <sgmltag>default</></title><para>
|
|
These hold a list of <sgmltag>family</> elements to be used by the <sgmltag>alias</> element.
|
|
<sgmltag>/article</>
|
|
</para></refsect2>
|
|
</refsect1>
|
|
<refsect1><title>EXAMPLE CONFIGURATION FILE</title>
|
|
<refsect2><title>System configuration file</title>
|
|
<para>
|
|
This is an example of a system-wide configuration file
|
|
</para>
|
|
<programlisting>
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
|
|
<!-- &confdir;/fonts.conf file to configure system font access -->
|
|
<fontconfig>
|
|
<!--
|
|
Find fonts in these directories
|
|
-->
|
|
<dir>/usr/share/fonts</dir>
|
|
<dir>/usr/X11R6/lib/X11/fonts</dir>
|
|
|
|
<!--
|
|
Accept deprecated 'mono' alias, replacing it with 'monospace'
|
|
-->
|
|
<match target="pattern">
|
|
<test qual="any" name="family"><string>mono</string></test>
|
|
<edit name="family" mode="assign"><string>monospace</string></edit>
|
|
</match>
|
|
|
|
<!--
|
|
Names not including any well known alias are given 'sans'
|
|
-->
|
|
<match target="pattern">
|
|
<test qual="all" name="family" mode="not_eq">sans</test>
|
|
<test qual="all" name="family" mode="not_eq">serif</test>
|
|
<test qual="all" name="family" mode="not_eq">monospace</test>
|
|
<edit name="family" mode="append_last"><string>sans</string></edit>
|
|
</match>
|
|
|
|
<!--
|
|
Load per-user customization file, but don't complain
|
|
if it doesn't exist
|
|
-->
|
|
<include ignore_missing="yes">~/.fonts.conf</include>
|
|
|
|
<!--
|
|
Load local customization files, but don't complain
|
|
if there aren't any
|
|
-->
|
|
<include ignore_missing="yes">conf.d</include>
|
|
<include ignore_missing="yes">local.conf</include>
|
|
|
|
<!--
|
|
Alias well known font names to available TrueType fonts.
|
|
These substitute TrueType faces for similar Type1
|
|
faces to improve screen appearance.
|
|
-->
|
|
<alias>
|
|
<family>Times</family>
|
|
<prefer><family>Times New Roman</family></prefer>
|
|
<default><family>serif</family></default>
|
|
</alias>
|
|
<alias>
|
|
<family>Helvetica</family>
|
|
<prefer><family>Arial</family></prefer>
|
|
<default><family>sans</family></default>
|
|
</alias>
|
|
<alias>
|
|
<family>Courier</family>
|
|
<prefer><family>Courier New</family></prefer>
|
|
<default><family>monospace</family></default>
|
|
</alias>
|
|
|
|
<!--
|
|
Provide required aliases for standard names
|
|
Do these after the users configuration file so that
|
|
any aliases there are used preferentially
|
|
-->
|
|
<alias>
|
|
<family>serif</family>
|
|
<prefer><family>Times New Roman</family></prefer>
|
|
</alias>
|
|
<alias>
|
|
<family>sans</family>
|
|
<prefer><family>Arial</family></prefer>
|
|
</alias>
|
|
<alias>
|
|
<family>monospace</family>
|
|
<prefer><family>Andale Mono</family></prefer>
|
|
</alias>
|
|
</fontconfig>
|
|
</programlisting>
|
|
</refsect2>
|
|
<refsect2><title>User configuration file</title>
|
|
<para>
|
|
This is an example of a per-user configuration file that lives in
|
|
~/.fonts.conf
|
|
</para>
|
|
<programlisting>
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
|
|
<!-- ~/.fonts.conf for per-user font configuration -->
|
|
<fontconfig>
|
|
|
|
<!--
|
|
Private font directory
|
|
-->
|
|
<dir>~/.fonts</dir>
|
|
|
|
<!--
|
|
use rgb sub-pixel ordering to improve glyph appearance on
|
|
LCD screens. Changes affecting rendering, but not matching
|
|
should always use target="font".
|
|
-->
|
|
<match target="font">
|
|
<edit name="rgba" mode="assign"><const>rgb</const></edit>
|
|
</match>
|
|
</fontconfig>
|
|
</programlisting>
|
|
</refsect2>
|
|
</refsect1>
|
|
<refsect1><title>Files</title>
|
|
<para>
|
|
<emphasis>fonts.conf</emphasis>
|
|
contains configuration information for the fontconfig library
|
|
consisting of directories to look at for font information as well as
|
|
instructions on editing program specified font patterns before attempting to
|
|
match the available fonts. It is in xml format.
|
|
</para>
|
|
<para>
|
|
<emphasis>conf.d</emphasis>
|
|
is the conventional name for a directory of additional configuration files
|
|
managed by external applications or the local administrator. The
|
|
filenames starting with decimal digits are sorted in lexicographic order
|
|
and used as additional configuration files. All of these files are in xml
|
|
format. The master fonts.conf file references this directory in an
|
|
<include> directive.
|
|
</para>
|
|
<para>
|
|
<emphasis>fonts.dtd</emphasis>
|
|
is a DTD that describes the format of the configuration files.
|
|
</para>
|
|
<para>
|
|
<emphasis>~/.fonts.conf</emphasis>
|
|
is the conventional location for per-user font configuration, although the
|
|
actual location is specified in the global fonts.conf file.
|
|
</para>
|
|
<para>
|
|
<emphasis> ~/.fonts.cache-*</emphasis>
|
|
is the conventional repository of font information that isn't found in the
|
|
per-directory caches. This file is automatically maintained by fontconfig.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1><title>See Also</title>
|
|
<para>
|
|
fc-cache(1), fc-match(1), fc-list(1)
|
|
</para>
|
|
</refsect1>
|
|
<refsect1><title>Version</title>
|
|
<para>
|
|
Fontconfig version &version;
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|