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| author | marha <marha@users.sourceforge.net> | 2011-01-19 10:14:56 +0000 |
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| committer | marha <marha@users.sourceforge.net> | 2011-01-19 10:14:56 +0000 |
| commit | e75ba771a1b0e80ef8413d368213a942455a7e2e (patch) | |
| tree | eda0e3b99b6ef7da7474c3b5aad38eb322372d22 /fontconfig/doc/fontconfig-user.sgml | |
| parent | 36c829ccf632f2f3adc6d13313406d6383b33993 (diff) | |
| parent | 6e3cfc5bc8ca969856e4d56dec01870df709d75a (diff) | |
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diff --git a/fontconfig/doc/fontconfig-user.sgml b/fontconfig/doc/fontconfig-user.sgml new file mode 100644 index 000000000..298f8d5f5 --- /dev/null +++ b/fontconfig/doc/fontconfig-user.sgml @@ -0,0 +1,692 @@ +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V3.1//EN" [ +<!ENTITY version SYSTEM "version.sgml"> +<!ENTITY confdir SYSTEM "confdir.sgml"> +]> +<!-- + Copyright © 2003 Keith Packard + + Permission to use, copy, modify, distribute, and sell this software and its + documentation for any purpose is hereby granted without fee, provided that + the above copyright notice appear in all copies and that both that + copyright notice and this permission notice appear in supporting + documentation, and that the name of Keith Packard not be used in + advertising or publicity pertaining to distribution of the software without + specific, written prior permission. Keith Packard makes no + representations about the suitability of this software for any purpose. It + is provided "as is" without express or implied warranty. + + THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR + CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + PERFORMANCE OF THIS SOFTWARE. +--> +<refentry> +<refmeta> + <refentrytitle>fonts-conf</refentrytitle> + <manvolnum>5</manvolnum> +</refmeta> +<refnamediv> + <refname>fonts.conf</refname> + <refpurpose>Font configuration files</refpurpose> +</refnamediv> +<refsynopsisdiv> +<synopsis> + &confdir;/fonts.conf + &confdir;/fonts.dtd + &confdir;/conf.d + ~/.fonts.conf.d + ~/.fonts.conf +</synopsis> +</refsynopsisdiv> +<refsect1><title>Description</title> + <para> +Fontconfig is a library designed to provide system-wide font configuration, +customization and application access. + </para> +</refsect1> +<refsect1><title>Functional Overview</title> + <para> +Fontconfig contains two essential modules, the configuration module which +builds an internal configuration from XML files and the matching module +which accepts font patterns and returns the nearest matching font. + </para> + <refsect2><title>Font Configuration</title> + <para> +The configuration module consists of the FcConfig datatype, libexpat and +FcConfigParse which walks over an XML tree and amends a configuration with +data found within. From an external perspective, configuration of the +library consists of generating a valid XML tree and feeding that to +FcConfigParse. The only other mechanism provided to applications for +changing the running configuration is to add fonts and directories to the +list of application-provided font files. + </para><para> +The intent is to make font configurations relatively static, and shared by +as many applications as possible. It is hoped that this will lead to more +stable font selection when passing names from one application to another. +XML was chosen as a configuration file format because it provides a format +which is easy for external agents to edit while retaining the correct +structure and syntax. + </para><para> +Font configuration is separate from font matching; applications needing to +do their own matching can access the available fonts from the library and +perform private matching. The intent is to permit applications to pick and +choose appropriate functionality from the library instead of forcing them to +choose between this library and a private configuration mechanism. The hope +is that this will ensure that configuration of fonts for all applications +can be centralized in one place. Centralizing font configuration will +simplify and regularize font installation and customization. + </para> + </refsect2> + <refsect2> + <title>Font Properties</title> + <para> +While font patterns may contain essentially any properties, there are some +well known properties with associated types. Fontconfig uses some of these +properties for font matching and font completion. Others are provided as a +convenience for the applications' rendering mechanism. + </para> + <programlisting> + Property Type Description + -------------------------------------------------------------- + family String Font family names + familylang String Languages corresponding to each family + style String Font style. Overrides weight and slant + stylelang String Languages corresponding to each style + fullname String Font full names (often includes style) + fullnamelang String Languages corresponding to each fullname + slant Int Italic, oblique or roman + weight Int Light, medium, demibold, bold or black + size Double Point size + width Int Condensed, normal or expanded + aspect Double Stretches glyphs horizontally before hinting + pixelsize Double Pixel size + spacing Int Proportional, dual-width, monospace or charcell + foundry String Font foundry name + antialias Bool Whether glyphs can be antialiased + hinting Bool Whether the rasterizer should use hinting + hintstyle Int Automatic hinting style + verticallayout Bool Use vertical layout + autohint Bool Use autohinter instead of normal hinter + globaladvance Bool Use font global advance data + file String The filename holding the font + index Int The index of the font within the file + ftface FT_Face Use the specified FreeType face object + rasterizer String Which rasterizer is in use + outline Bool Whether the glyphs are outlines + scalable Bool Whether glyphs can be scaled + scale Double Scale factor for point->pixel conversions + dpi Double Target dots per inch + rgba Int unknown, rgb, bgr, vrgb, vbgr, + none - subpixel geometry + lcdfilter Int Type of LCD filter + minspace Bool Eliminate leading from line spacing + charset CharSet Unicode chars encoded by the font + lang String List of RFC-3066-style languages this + font supports + fontversion Int Version number of the font + capability String List of layout capabilities in the font + embolden Bool Rasterizer should synthetically embolden the font + </programlisting> + </refsect2> + <refsect2> + <title>Font Matching</title> + <para> +Fontconfig performs matching by measuring the distance from a provided +pattern to all of the available fonts in the system. The closest matching +font is selected. This ensures that a font will always be returned, but +doesn't ensure that it is anything like the requested pattern. + </para><para> +Font matching starts with an application constructed pattern. The desired +attributes of the resulting font are collected together in a pattern. Each +property of the pattern can contain one or more values; these are listed in +priority order; matches earlier in the list are considered "closer" than +matches later in the list. + </para><para> +The initial pattern is modified by applying the list of editing instructions +specific to patterns found in the configuration; each consists of a match +predicate and a set of editing operations. They are executed in the order +they appeared in the configuration. Each match causes the associated +sequence of editing operations to be applied. + </para><para> +After the pattern has been edited, a sequence of default substitutions are +performed to canonicalize the set of available properties; this avoids the +need for the lower layers to constantly provide default values for various +font properties during rendering. + </para><para> +The canonical font pattern is finally matched against all available fonts. +The distance from the pattern to the font is measured for each of several +properties: foundry, charset, family, lang, spacing, pixelsize, style, +slant, weight, antialias, rasterizer and outline. This list is in priority +order -- results of comparing earlier elements of this list weigh more +heavily than later elements. + </para><para> +There is one special case to this rule; family names are split into two +bindings; strong and weak. Strong family names are given greater precedence +in the match than lang elements while weak family names are given lower +precedence than lang elements. This permits the document language to drive +font selection when any document specified font is unavailable. + </para><para> +The pattern representing that font is augmented to include any properties +found in the pattern but not found in the font itself; this permits the +application to pass rendering instructions or any other data through the +matching system. Finally, the list of editing instructions specific to +fonts found in the configuration are applied to the pattern. This modified +pattern is returned to the application. + </para><para> +The return value contains sufficient information to locate and rasterize the +font, including the file name, pixel size and other rendering data. As +none of the information involved pertains to the FreeType library, +applications are free to use any rasterization engine or even to take +the identified font file and access it directly. + </para><para> +The match/edit sequences in the configuration are performed in two passes +because there are essentially two different operations necessary -- the +first is to modify how fonts are selected; aliasing families and adding +suitable defaults. The second is to modify how the selected fonts are +rasterized. Those must apply to the selected font, not the original pattern +as false matches will often occur. + </para> + </refsect2> + <refsect2><title>Font Names</title> + <para> +Fontconfig provides a textual representation for patterns that the library +can both accept and generate. The representation is in three parts, first a +list of family names, second a list of point sizes and finally a list of +additional properties: + </para> + <programlisting> + <families>-<point sizes>:<name1>=<values1>:<name2>=<values2>... + </programlisting> + <para> +Values in a list are separated with commas. The name needn't include either +families or point sizes; they can be elided. In addition, there are +symbolic constants that simultaneously indicate both a name and a value. +Here are some examples: + </para> + <programlisting> + Name Meaning + ---------------------------------------------------------- + Times-12 12 point Times Roman + Times-12:bold 12 point Times Bold + Courier:italic Courier Italic in the default size + Monospace:matrix=1 .1 0 1 The users preferred monospace font + with artificial obliquing + </programlisting> + <para> +The '\', '-', ':' and ',' characters in family names must be preceeded by a +'\' character to avoid having them misinterpreted. Similarly, values +containing '\', '=', '_', ':' and ',' must also have them preceeded by a +'\' character. The '\' characters are stripped out of the family name and +values as the font name is read. + </para> + </refsect2> +</refsect1> +<refsect1><title>Debugging Applications</title> + <para> +To help diagnose font and applications problems, fontconfig is built with a +large amount of internal debugging left enabled. It is controlled by means +of the FC_DEBUG environment variable. The value of this variable is +interpreted as a number, and each bit within that value controls different +debugging messages. + </para> + <programlisting> + Name Value Meaning + --------------------------------------------------------- + MATCH 1 Brief information about font matching + MATCHV 2 Extensive font matching information + EDIT 4 Monitor match/test/edit execution + FONTSET 8 Track loading of font information at startup + CACHE 16 Watch cache files being written + CACHEV 32 Extensive cache file writing information + PARSE 64 (no longer in use) + SCAN 128 Watch font files being scanned to build caches + SCANV 256 Verbose font file scanning information + MEMORY 512 Monitor fontconfig memory usage + CONFIG 1024 Monitor which config files are loaded + LANGSET 2048 Dump char sets used to construct lang values + OBJTYPES 4096 Display message when value typechecks fail + </programlisting> + <para> +Add the value of the desired debug levels together and assign that (in +base 10) to the FC_DEBUG environment variable before running the +application. Output from these statements is sent to stdout. + </para> +</refsect1> +<refsect1><title>Lang Tags</title> + <para> +Each font in the database contains a list of languages it supports. This is +computed by comparing the Unicode coverage of the font with the orthography +of each language. Languages are tagged using an RFC-3066 compatible naming +and occur in two parts -- the ISO 639 language tag followed a hyphen and then +by the ISO 3166 country code. The hyphen and country code may be elided. + </para><para> +Fontconfig has orthographies for several languages built into the library. +No provision has been made for adding new ones aside from rebuilding the +library. It currently supports 122 of the 139 languages named in ISO 639-1, +141 of the languages with two-letter codes from ISO 639-2 and another 30 +languages with only three-letter codes. Languages with both two and three +letter codes are provided with only the two letter code. + </para><para> +For languages used in multiple territories with radically different +character sets, fontconfig includes per-territory orthographies. This +includes Azerbaijani, Kurdish, Pashto, Tigrinya and Chinese. + </para> +</refsect1> +<refsect1><title>Configuration File Format</title> + <para> +Configuration files for fontconfig are stored in XML format; this +format makes external configuration tools easier to write and ensures that +they will generate syntactically correct configuration files. As XML +files are plain text, they can also be manipulated by the expert user using +a text editor. + </para><para> +The fontconfig document type definition resides in the external entity +"fonts.dtd"; this is normally stored in the default font configuration +directory (&confdir;). Each configuration file should contain the +following structure: + <programlisting> + <?xml version="1.0"?> + <!DOCTYPE fontconfig SYSTEM "fonts.dtd"> + <fontconfig> + ... + </fontconfig> + </programlisting> + </para> +<refsect2><title><literal><fontconfig></literal></title><para> +This is the top level element for a font configuration and can contain +<literal><dir></literal>, <literal><cache></literal>, <literal><include></literal>, <literal><match></literal> and <literal><alias></literal> elements in any order. + </para></refsect2> + <refsect2><title><literal><dir></literal></title><para> +This element contains a directory name which will be scanned for font files +to include in the set of available fonts. + </para></refsect2> + <refsect2><title><literal><cache></literal></title><para> +This element contains a file name for the per-user cache of font +information. If it starts with '~', it refers to a file in the users +home directory. This file is used to hold information about fonts that +isn't present in the per-directory cache files. It is automatically +maintained by the fontconfig library. The default for this file +is ``~/.fonts.cache-<literal><version></literal>'', where <literal><version></literal> is the font configuration +file version number (currently 2). + </para></refsect2> + <refsect2><title><literal><include ignore_missing="no"></literal></title><para> +This element contains the name of an additional configuration file or +directory. If a directory, every file within that directory starting with an +ASCII digit (U+0030 - U+0039) and ending with the string ``.conf'' will be processed in sorted order. When +the XML datatype is traversed by FcConfigParse, the contents of the file(s) +will also be incorporated into the configuration by passing the filename(s) to +FcConfigLoadAndParse. If 'ignore_missing' is set to "yes" instead of the +default "no", a missing file or directory will elicit no warning message from +the library. + </para></refsect2> + <refsect2><title><literal><config></literal></title><para> +This element provides a place to consolidate additional configuration +information. <literal><config></literal> can contain <literal><blank></literal> and <literal><rescan></literal> elements in any +order. + </para></refsect2> + <refsect2><title><literal><blank></literal></title><para> +Fonts often include "broken" glyphs which appear in the encoding but are +drawn as blanks on the screen. Within the <literal><blank></literal> element, place each +Unicode characters which is supposed to be blank in an <literal><int></literal> element. +Characters outside of this set which are drawn as blank will be elided from +the set of characters supported by the font. + </para></refsect2> + <refsect2><title><literal><rescan></literal></title><para> +The <literal><rescan></literal> element holds an <literal><int></literal> element which indicates the default +interval between automatic checks for font configuration changes. +Fontconfig will validate all of the configuration files and directories and +automatically rebuild the internal datastructures when this interval passes. + </para></refsect2> + <refsect2><title><literal><selectfont></literal></title><para> +This element is used to black/white list fonts from being listed or matched +against. It holds acceptfont and rejectfont elements. + </para></refsect2> + <refsect2><title><literal><acceptfont></literal></title><para> +Fonts matched by an acceptfont element are "whitelisted"; such fonts are +explicitly included in the set of fonts used to resolve list and match +requests; including them in this list protects them from being "blacklisted" +by a rejectfont element. Acceptfont elements include glob and pattern +elements which are used to match fonts. + </para></refsect2> + <refsect2><title><literal><rejectfont></literal></title><para> +Fonts matched by an rejectfont element are "blacklisted"; such fonts are +excluded from the set of fonts used to resolve list and match requests as if +they didn't exist in the system. Rejectfont elements include glob and +pattern elements which are used to match fonts. + </para></refsect2> + <refsect2><title><literal><glob></literal></title><para> +Glob elements hold shell-style filename matching patterns (including ? and +*) which match fonts based on their complete pathnames. This can be used to +exclude a set of directories (/usr/share/fonts/uglyfont*), or particular +font file types (*.pcf.gz), but the latter mechanism relies rather heavily +on filenaming conventions which can't be relied upon. Note that globs +only apply to directories, not to individual fonts. + </para></refsect2> + <refsect2><title><literal><pattern></literal></title><para> +Pattern elements perform list-style matching on incoming fonts; that is, +they hold a list of elements and associated values. If all of those +elements have a matching value, then the pattern matches the font. This can +be used to select fonts based on attributes of the font (scalable, bold, +etc), which is a more reliable mechanism than using file extensions. +Pattern elements include patelt elements. + </para></refsect2> + <refsect2><title><literal><patelt name="property"></literal></title><para> +Patelt elements hold a single pattern element and list of values. They must +have a 'name' attribute which indicates the pattern element name. Patelt +elements include int, double, string, matrix, bool, charset and const +elements. + </para></refsect2> + <refsect2><title><literal><match target="pattern"></literal></title><para> +This element holds first a (possibly empty) list of <literal><test></literal> elements and then +a (possibly empty) list of <literal><edit></literal> elements. Patterns which match all of the +tests are subjected to all the edits. If 'target' is set to "font" instead +of the default "pattern", then this element applies to the font name +resulting from a match rather than a font pattern to be matched. If 'target' +is set to "scan", then this element applies when the font is scanned to +build the fontconfig database. + </para></refsect2> + <refsect2><title><literal><test qual="any" name="property" target="default" compare="eq"></literal></title><para> +This element contains a single value which is compared with the target +('pattern', 'font', 'scan' or 'default') property "property" (substitute any of the property names seen +above). 'compare' can be one of "eq", "not_eq", "less", "less_eq", "more", or +"more_eq". 'qual' may either be the default, "any", in which case the match +succeeds if any value associated with the property matches the test value, or +"all", in which case all of the values associated with the property must +match the test value. When used in a <match target="font"> element, +the target= attribute in the <test> element selects between matching +the original pattern or the font. "default" selects whichever target the +outer <match> element has selected. + </para></refsect2> + <refsect2><title><literal><edit name="property" mode="assign" binding="weak"></literal></title><para> +This element contains a list of expression elements (any of the value or +operator elements). The expression elements are evaluated at run-time and +modify the property "property". The modification depends on whether +"property" was matched by one of the associated <literal><test></literal> elements, if so, the +modification may affect the first matched value. Any values inserted into +the property are given the indicated binding ("strong", "weak" or "same") +with "same" binding using the value from the matched pattern element. +'mode' is one of: + <programlisting> + Mode With Match Without Match + --------------------------------------------------------------------- + "assign" Replace matching value Replace all values + "assign_replace" Replace all values Replace all values + "prepend" Insert before matching Insert at head of list + "prepend_first" Insert at head of list Insert at head of list + "append" Append after matching Append at end of list + "append_last" Append at end of list Append at end of list + </programlisting> + </para></refsect2> + <refsect2><title><literal><int></literal>, <literal><double></literal>, <literal><string></literal>, <literal><bool></literal></title><para> +These elements hold a single value of the indicated type. <literal><bool></literal> +elements hold either true or false. An important limitation exists in +the parsing of floating point numbers -- fontconfig requires that +the mantissa start with a digit, not a decimal point, so insert a leading +zero for purely fractional values (e.g. use 0.5 instead of .5 and -0.5 +instead of -.5). + </para></refsect2> + <refsect2><title><literal><matrix></literal></title><para> +This element holds the four <literal><double></literal> elements of an affine +transformation. + </para></refsect2> + <refsect2><title><literal><name></literal></title><para> +Holds a property name. Evaluates to the first value from the property of +the font, not the pattern. + </para></refsect2> + <refsect2><title><literal><const></literal></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 + lcdnone lcdfilter 0 + lcddefault lcdfilter 1 + lcdlight lcdfilter 2 + lcdlegacy lcdfilter 3 + hintnone hintstyle 0 + hintslight hintstyle 1 + hintmedium hintstyle 2 + hintfull hintstyle 3 + </programlisting> + </para> + </refsect2> + <refsect2> + <title><literal><or></literal>, <literal><and></literal>, <literal><plus></literal>, <literal><minus></literal>, <literal><times></literal>, <literal><divide></literal></title> + <para> +These elements perform the specified operation on a list of expression +elements. <literal><or></literal> and <literal><and></literal> are boolean, not bitwise. + </para> + </refsect2> + <refsect2> + <title><literal><eq></literal>, <literal><not_eq></literal>, <literal><less></literal>, <literal><less_eq></literal>, <literal><more></literal>, <literal><more_eq></literal></title> + <para> +These elements compare two values, producing a boolean result. + </para></refsect2> + <refsect2><title><literal><not></literal></title><para> +Inverts the boolean sense of its one expression element + </para></refsect2> + <refsect2><title><literal><if></literal></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><literal><alias></literal></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 +<literal><family></literal> element followed by optional <literal><prefer></literal>, <literal><accept></literal> and <literal><default></literal> +elements. Fonts matching the <literal><family></literal> element are edited to prepend the +list of <literal><prefer></literal>ed families before the matching <literal><family></literal>, append the +<literal><accept></literal>able families after the matching <literal><family></literal> and append the <literal><default></literal> +families to the end of the family list. + </para></refsect2> + <refsect2><title><literal><family></literal></title><para> +Holds a single font family name + </para></refsect2> + <refsect2><title><literal><prefer></literal>, <literal><accept></literal>, <literal><default></literal></title><para> +These hold a list of <literal><family></literal> elements to be used by the <literal><alias></literal> element. + </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.d</emphasis> +is the conventional name for a per-user directory of (typically +auto-generated) configuration files, although the +actual location is specified in the global fonts.conf file. + </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-cat(1), fc-cache(1), fc-list(1), fc-match(1), fc-query(1) + </para> +</refsect1> +<refsect1><title>Version</title> + <para> +Fontconfig version &version; + </para> +</refsect1> +</refentry> |