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       fonts.conf - Font configuration files


       Fontconfig is a library designed	to provide system-wide font configura-
       tion, customization and application access.

       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

       The  configuration  module  consists of the FcConfig datatype, libexpat
       and FcConfigParse which walks over an XML tree and amends a  configura-
       tion  with  data	found within. From an external perspective, configura-
       tion of the library consists of generating a valid XML tree and feeding
       that  to	 FcConfigParse.	 The only other	mechanism provided to applica-
       tions for changing the running configuration is to add fonts and	direc-
       tories to the list of application-provided font files.

       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 pro-
       vides  a	format which is	easy for external agents to edit while retain-
       ing the correct structure and syntax.

       Font configuration is separate from font	matching; applications needing
       to  do  their  own matching can access the available fonts from the li-
       brary and perform private matching. The intent is  to  permit  applica-
       tions to	pick and choose	appropriate functionality from the library in-
       stead of	forcing	them to	choose between this library and	a private con-
       figuration mechanism. The hope is that this will	ensure that configura-
       tion of fonts for all applications can be  centralized  in  one	place.
       Centralizing  font  configuration will simplify and regularize font in-
       stallation and customization.

       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.

	 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 (deprecated)
	 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 (deprecated)
	 outline	 Bool	 Whether the glyphs are	outlines
	 scalable	 Bool	 Whether glyphs	can be scaled
	 color		 Bool	 Whether any glyphs have color
	 scale		 Double	 Scale factor for point->pixel conversions (deprecated)
	 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
	 fontformat	 String	 String	name of	the font format
	 embolden	 Bool	 Rasterizer should synthetically embolden the font
	 embeddedbitmap	 Bool	 Use the embedded bitmap instead of the	outline
	 decorative	 Bool	 Whether the style is a	decorative variant
	 fontfeatures	 String	 List of the feature tags in OpenType to be enabled
	 namelang	 String	 Language name to be used for the default value	of
				 familylang, stylelang,	and fullnamelang
	 prgname	 String	 String	 Name of the running program
	 postscriptname	 String	 Font family name in PostScript
	 fonthashint	 Bool	 Whether the font has hinting
	 order		 Int	 Order number of the font

       Fontconfig  performs matching by	measuring the distance from a provided
       pattern to all of the available fonts in	the system. The	closest	match-
       ing font	is selected. This ensures that a font will always be returned,
       but doesn't ensure that it is anything like the requested pattern.

       Font matching starts with an application	constructed pattern.  The  de-
       sired attributes	of the resulting font are collected together in	a pat-
       tern. 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.

       The initial pattern is modified by applying the	list  of  editing  in-
       structions  specific  to	patterns found in the configuration; each con-
       sists 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.

       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 val-
       ues for various font properties during rendering.

       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,	pixel-
       size, 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.

       There is	one special case to this rule; family names are	split into two
       bindings; strong	and weak. Strong family	names are given	greater	prece-
       dence 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  unavail-

       The  pattern representing that font is augmented	to include any proper-
       ties found in the pattern but not found in the font itself;  this  per-
       mits  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 pat-
       tern. This modified pattern is returned to the application.

       The return value	contains sufficient information	to locate and  raster-
       ize  the	 font, including the file name,	pixel size and other rendering
       data. As	none of	the information	involved pertains to the FreeType  li-
       brary, applications are free to use any rasterization engine or even to
       take the	identified font	file and access	it directly.

       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.

       Fontconfig  provides a textual representation for patterns that the li-
       brary 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:

	    <families>-<point sizes>:<name1>=<values1>:<name2>=<values2>...

       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:

	 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

       The  '\',  '-', ':' and ',' characters in family	names must be preceded
       by a '\'	character to avoid having them misinterpreted. Similarly, val-
       ues  containing '\', '=', '_', ':' and ',' must also have them preceded
       by a '\'	character. The '\' characters are stripped out of  the	family
       name and	values as the font name	is read.

       To  help	 diagnose  font	and applications problems, fontconfig is built
       with a large amount of internal debugging  left	enabled.  It  is  con-
       trolled	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.

	 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
	 MATCH2	       4096    Display font-matching transformation in patterns

       Add  the	value of the desired debug levels together and assign that (in
       base 10)	to the FC_DEBUG	environment variable before running the	appli-
       cation. Output from these statements is sent to stdout.

       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.

       Fontconfig has orthographies for	several	languages built	into  the  li-
       brary.	No  provision has been made for	adding new ones	aside from re-
       building	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.

       For languages used in multiple  territories  with  radically  different
       character  sets,	 fontconfig includes per-territory orthographies. This
       includes	Azerbaijani, Kurdish, Pashto, Tigrinya and Chinese.

       Configuration files for fontconfig are stored in	XML format; this  for-
       mat 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.

       The fontconfig document type definition resides in the external	entity
       "fonts.dtd";  this is normally stored in	the default font configuration
       directory (/etc/fonts). Each configuration file should contain the fol-
       lowing structure:

	    <?xml version="1.0"?>
	    <!DOCTYPE fontconfig SYSTEM	"urn:fontconfig:fonts.dtd">

       This  is	the top	level element for a font configuration and can contain
       <dir>, <cachedir>, <include>, <match> and <alias> elements in  any  or-

       This  element  contains a directory name	which will be scanned for font
       files to	include	in the set of available	fonts.

       If 'prefix' is set to "default" or "cwd", the current working directory
       will be added as	the path prefix	prior to the value. If 'prefix'	is set
       to "xdg", the value in the XDG_DATA_HOME	environment variable  will  be
       added  as  the path prefix. please see XDG Base Directory Specification
       for more	details. If 'prefix' is	set to "relative", the path of current
       file will be added prior	to the value.

       'salt' property affects to determine cache filename. this is useful for
       example when having different fonts sets	on same	path at	container  and
       share fonts from	host on	different font path.

       This element contains a directory name that is supposed to be stored or
       read the	cache of font information. If multiple elements	are  specified
       in  the configuration file, the directory that can be accessed first in
       the list	will be	used to	store the cache	files. If it starts with  '~',
       it  refers  to  a directory in the users	home directory.	If 'prefix' is
       set to "xdg", the value in the XDG_CACHE_HOME environment variable will
       be  added  as the path prefix. please see XDG Base Directory Specifica-
       tion    for    more    details.	   The	  default     directory	    is
       ``$XDG_CACHE_HOME/fontconfig''  and  it	contains the cache files named
       ``<hash value>-<architecture>.cache-<version>'',	where <version>	is the
       fontconfig cache	file version number (currently 7).

       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  Fc-
       ConfigLoadAndParse.  If 'ignore_missing'	is set to "yes"	instead	of the
       default "no", a missing file or directory will elicit no	 warning  mes-
       sage  from  the	library. If 'prefix' is	set to "xdg", the value	in the
       XDG_CONFIG_HOME environment variable will be added as the path  prefix.
       please see XDG Base Directory Specification for more details.

       This  element  provides a place to consolidate additional configuration
       information. <config> can contain <blank> and <rescan> elements in  any

       This  element  is supposed to hold strings which	describe what a	config
       is used for.  This string can be	translated through  gettext.  'domain'
       needs  to  be set the proper name to apply then.	 fontconfig will tries
       to retrieve translations	with 'domain' from gettext.

       Fonts often include "broken" glyphs which appear	in  the	 encoding  but
       are  drawn  as  blanks on the screen. Within the	<blank>	element, place
       each Unicode characters which is	supposed to be blank in	an <int>  ele-
       ment.   Characters outside of this set which are	drawn as blank will be
       elided from the set of characters supported by the font.

       This element contains a directory name where will be mapped as the path
       'as-path'  in cached information.  This is useful if the	directory name
       is an alias (via	a bind mount or	symlink) to another directory  in  the
       system for which	cached font information	is likely to exist.

       'salt'  property	 affects  to determine cache filename as same as <dir>

       This element removes all	of fonts directories where added by <dir> ele-
       ments.  This is useful to override fonts	directories from system	to own
       fonts directories only.

       The <rescan> element holds an <int> 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	inter-
       val passes.

       This element is used to black/white list	fonts  from  being  listed  or
       matched against.	It holds acceptfont and	rejectfont elements.

       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.

       Fonts  matched  by  an rejectfont element are "blacklisted"; such fonts
       are excluded from the set of fonts used to resolve list and  match  re-
       quests  as  if they didn't exist	in the system. Rejectfont elements in-
       clude glob and pattern elements which are used to match fonts.

       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.

       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	exten-
       sions.  Pattern elements	include	patelt elements.

       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.

       This element holds first	a (possibly empty) list	of <test> elements and
       then a (possibly	empty) list of <edit> 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.

       This  element contains a	single value which is compared with the	target
       ('pattern', 'font', 'scan' or 'default')	property  "property"  (substi-
       tute  any  of  the  property names seen above). 'compare' can be	one of
       "eq", "not_eq", "less", "less_eq",  "more",  "more_eq",	"contains"  or
       "not_contains".	'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.  'ignore-blanks'  takes  a
       boolean	value.	if  'ignore-blanks'  is	 set "true", any blanks	in the
       string will be ignored on its comparison. this takes effects only  when
       compare="eq" or compare="not_eq".  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.

       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 <test> ele-
       ments, 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:

	 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
	 "delete"		 Delete	matching value	 Delete	all values
	 "delete_all"		 Delete	all values	 Delete	all values

       These  elements	hold a single value of the indicated type. <bool> ele-
       ments hold either true or false.	An important limitation	exists in  the
       parsing	of floating point numbers -- fontconfig	requires that the man-
       tissa 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 in-
       stead of	-.5).

       This element holds four numerical expressions of	an affine  transforma-
       tion.   At their	simplest these will be four <double> elements but they
       can also	be more	involved expressions.

       This element holds the two <int>	elements of a range representation.

       This element holds at least one <int> element of	an Unicode code	 point
       or more.

       This  element  holds  at	least one <string> element of a	RFC-3066-style
       languages or more.

       Holds a property	name. Evaluates	to the first value from	 the  property
       of  the	pattern. If the	'target' attribute is not present, it will de-
       fault to	'default', in which case the property  is  returned  from  the
       font  pattern during a target="font" match, and to the pattern during a
       target="pattern"	match. The attribute can also take the	values	'font'
       or  'pattern' to	explicitly choose which	pattern	to use.	It is an error
       to use a	target of 'font' in a match that has target="pattern".

       Holds the name of a constant; these are always integers	and  serve  as
       symbolic	names for common font values:

	 Constant	 Property	 Value
	 thin		 weight		 0
	 extralight	 weight		 40
	 ultralight	 weight		 40
	 light		 weight		 50
	 demilight	 weight		 55
	 semilight	 weight		 55
	 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

   <OR>, <AND>,	<PLUS>,	<MINUS>, <TIMES>, <DIVIDE>
       These  elements perform the specified operation on a list of expression
       elements. <or> and <and>	are boolean, not bitwise.

       These elements compare two values, producing a boolean result.

       Inverts the boolean sense of its	one expression element

       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.

       Alias elements provide a	shorthand notation for the set of common match
       operations needed to substitute one font	family for another. They  con-
       tain  a	<family>  element  followed by optional	<prefer>, <accept> and
       <default> elements. Fonts matching the <family> element are  edited  to
       prepend	the  list of <prefer>ed	families before	the matching <family>,
       append the <accept>able families	after the matching <family> and	append
       the <default> families to the end of the	family list.

       Holds a single font family name

       These  hold  a list of <family> elements	to be used by the <alias> ele-

       This is an example of a system-wide configuration file

       <?xml version="1.0"?>
       <!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
       <!-- /etc/fonts/fonts.conf file to configure system font	access -->
	    Find fonts in these	directories

	    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>

	    Names not including	any well known alias are given 'sans-serif'
       <match target="pattern">
	    <test qual="all" name="family" compare="not_eq"><string>sans-serif</string></test>
	    <test qual="all" name="family" compare="not_eq"><string>serif</string></test>
	    <test qual="all" name="family" compare="not_eq"><string>monospace</string></test>
	    <edit name="family"	mode="append_last"><string>sans-serif</string></edit>

	    Load per-user customization	file, but don't	complain
	    if it doesn't exist
       <include	ignore_missing="yes" prefix="xdg">fontconfig/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.
	    <prefer><family>Times New Roman</family></prefer>
	    <prefer><family>Courier New</family></prefer>

	    Provide required aliases for standard names
	    Do these after the users configuration file	so that
	    any	aliases	there are used preferentially
	    <prefer><family>Times New Roman</family></prefer>
	    <prefer><family>Andale Mono</family></prefer>

	    The	example	of the requirements of OR operator;
	    If the 'family' contains 'Courier New' OR 'Courier'
	    add	'monospace' as the alternative
       <match target="pattern">
	    <test name="family"	compare="eq">
		 <string>Courier New</string>
	    <edit name="family"	mode="prepend">
       <match target="pattern">
	    <test name="family"	compare="eq">
	    <edit name="family"	mode="prepend">


       This is an example of a	per-user  configuration	 file  that  lives  in

       <?xml version="1.0"?>
       <!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
       <!-- $XDG_CONFIG_HOME/fontconfig/fonts.conf for per-user	font configuration -->

	    Private font directory
       <dir prefix="xdg">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>
	    use	WenQuanYi Zen Hei font when serif is requested for Chinese
		 If you	don't want to use WenQuanYi Zen	Hei font for zh-tw etc,
		 you can use zh-cn instead of zh.
		 Please	note, even if you set zh-cn, it	still matches zh.
		 if you	don't like it, you can use compare="eq"
		 instead of compare="contains".
	    <test name="lang" compare="contains">
	    <test name="family">
	    <edit name="family"	mode="prepend">
		 <string>WenQuanYi Zen Hei</string>
	    use	VL Gothic font when sans-serif is requested for	Japanese
	    <test name="lang" compare="contains">
	    <test name="family">
	    <edit name="family"	mode="prepend">
		 <string>VL Gothic</string>

       fonts.conf  contains  configuration  information	for the	fontconfig li-
       brary consisting	of directories to look at for font information as well
       as  instructions	 on editing program specified font patterns before at-
       tempting	to match the available fonts. It is in XML format.

       conf.d is the conventional name for a directory of additional  configu-
       ration  files managed by	external applications or the local administra-
       tor. The	filenames starting with	decimal	digits are sorted  in  lexico-
       graphic	order and used as additional configuration files. All of these
       files are in XML	format.	The master fonts.conf file references this di-
       rectory in an <include> directive.

       fonts.dtd  is  a	 DTD  that  describes  the format of the configuration

       $XDG_CONFIG_HOME/fontconfig/conf.d and ~/.fonts.conf.d is  the  conven-
       tional name for a per-user directory of (typically auto-generated) con-
       figuration files, although the actual  location	is  specified  in  the
       global  fonts.conf file.	please note that ~/.fonts.conf.d is deprecated
       now. it will not	be read	by default in the future version.

       $XDG_CONFIG_HOME/fontconfig/fonts.conf and ~/.fonts.conf	is the conven-
       tional  location	 for  per-user font configuration, although the	actual
       location	is specified in	the global fonts.conf file. please  note  that
       ~/.fonts.conf  is deprecated now. it will not be	read by	default	in the
       future version.

       $XDG_CACHE_HOME/fontconfig/*.cache-*  and   ~/.fontconfig/*.cache-*  is
       the conventional	repository of font information that isn't found	in the
       per-directory caches. This file is automatically	maintained by fontcon-
       fig.  please  note  that	 ~/.fontconfig/*.cache-* is deprecated now. it
       will not	be read	by default in the future version.

       FONTCONFIG_FILE is used to override the default configuration file.

       FONTCONFIG_PATH is used to override the	default	 configuration	direc-

       FONTCONFIG_SYSROOT is used to set a default sysroot directory.

       FC_DEBUG	 is used to output the detailed	debugging messages. see	Debug-
       ging Applications section for more details.

       FC_DBG_MATCH_FILTER is used to filter out the patterns.	this  takes  a
       comma-separated list of object names and	effects	only when FC_DEBUG has
       MATCH2. see Debugging Applications section for more details.

       FC_LANG is used to specify the default language as the weak binding  in
       the  query.  if this isn't set, the default language will be determined
       from current locale.

       FONTCONFIG_USE_MMAP is used to control the use of mmap(2) for the cache
       files  if  available. this take a boolean value.	fontconfig will	checks
       if the cache files are stored on	the filesystem that  is	 safe  to  use
       mmap(2).	explicitly setting this	environment variable will causes skip-
       ping this check and enforce to use or not use mmap(2) anyway.

       SOURCE_DATE_EPOCH is used to ensure fc-cache(1) generates  files	 in  a
       deterministic  manner in	order to support reproducible builds. When set
       to a numeric representation of UNIX timestamp, fontconfig  will	prefer
       this value over using the modification timestamps of the	input files in
       order  to  identify  which  cache  files	  require   regeneration.   If
       SOURCE_DATE_EPOCH  is not set (or is newer than the mtime of the	direc-
       tory), the existing behaviour is	unchanged.

       fc-cat(1),   fc-cache(1),   fc-list(1),	  fc-match(1),	  fc-query(1),

       Fontconfig version 2.14.0

				  31 3ae 2022			 FONTS-CONF(5)


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