1FONTS-CONF(5) FONTS-CONF(5)
2
6 fonts.conf - Font configuration files
7
9 /etc/fonts/fonts.conf
10 /etc/fonts/fonts.dtd
11 /etc/fonts/conf.d
12 $XDG_CONFIG_HOME/fontconfig/conf.d
13 $XDG_CONFIG_HOME/fontconfig/fonts.conf
14 ~/.fonts.conf.d
15 ~/.fonts.conf
16
19 Fontconfig is a library designed to provide system-wide font configura‐
20 tion, customization and application access.
21
23 Fontconfig contains two essential modules, the configuration module
24 which builds an internal configuration from XML files and the matching
25 module which accepts font patterns and returns the nearest matching
26 font.
27 FONT CONFIGURATION
29 The configuration module consists of the FcConfig datatype, libexpat
30 and FcConfigParse which walks over an XML tree and amends a configura‐
31 tion with data found within. From an external perspective, configura‐
32 tion of the library consists of generating a valid XML tree and feeding
33 that to FcConfigParse. The only other mechanism provided to applica‐
34 tions for changing the running configuration is to add fonts and direc‐
35 tories to the list of application-provided font files.
36 The intent is to make font configurations relatively static, and shared
38 by as many applications as possible. It is hoped that this will lead to
39 more stable font selection when passing names from one application to
40 another. XML was chosen as a configuration file format because it pro‐
41 vides a format which is easy for external agents to edit while retain‐
42 ing the correct structure and syntax.
43 Font configuration is separate from font matching; applications needing
45 to do their own matching can access the available fonts from the
46 library and perform private matching. The intent is to permit applica‐
47 tions to pick and choose appropriate functionality from the library
48 instead of forcing them to choose between this library and a private
49 configuration mechanism. The hope is that this will ensure that config‐
50 uration of fonts for all applications can be centralized in one place.
51 Centralizing font configuration will simplify and regularize font
52 installation and customization.
53 FONT PROPERTIES
55 While font patterns may contain essentially any properties, there are
56 some well known properties with associated types. Fontconfig uses some
57 of these properties for font matching and font completion. Others are
58 provided as a convenience for the applications' rendering mechanism.
59 Property Type Description
61 --------------------------------------------------------------
62 family String Font family names
63 familylang String Languages corresponding to each family
64 style String Font style. Overrides weight and slant
65 stylelang String Languages corresponding to each style
66 fullname String Font full names (often includes style)
67 fullnamelang String Languages corresponding to each fullname
68 slant Int Italic, oblique or roman
69 weight Int Light, medium, demibold, bold or black
70 size Double Point size
71 width Int Condensed, normal or expanded
72 aspect Double Stretches glyphs horizontally before hinting
73 pixelsize Double Pixel size
74 spacing Int Proportional, dual-width, monospace or charcell
75 foundry String Font foundry name
76 antialias Bool Whether glyphs can be antialiased
77 hinting Bool Whether the rasterizer should use hinting
78 hintstyle Int Automatic hinting style
79 verticallayout Bool Use vertical layout
80 autohint Bool Use autohinter instead of normal hinter
81 globaladvance Bool Use font global advance data (deprecated)
82 file String The filename holding the font
83 index Int The index of the font within the file
84 ftface FT_Face Use the specified FreeType face object
85 rasterizer String Which rasterizer is in use (deprecated)
86 outline Bool Whether the glyphs are outlines
87 scalable Bool Whether glyphs can be scaled
88 color Bool Whether any glyphs have color
89 scale Double Scale factor for point->pixel conversions (deprecated)
90 dpi Double Target dots per inch
91 rgba Int unknown, rgb, bgr, vrgb, vbgr,
92 none - subpixel geometry
93 lcdfilter Int Type of LCD filter
94 minspace Bool Eliminate leading from line spacing
95 charset CharSet Unicode chars encoded by the font
96 lang String List of RFC-3066-style languages this
97 font supports
98 fontversion Int Version number of the font
99 capability String List of layout capabilities in the font
100 fontformat String String name of the font format
101 embolden Bool Rasterizer should synthetically embolden the font
102 embeddedbitmap Bool Use the embedded bitmap instead of the outline
103 decorative Bool Whether the style is a decorative variant
104 fontfeatures String List of the feature tags in OpenType to be enabled
105 namelang String Language name to be used for the default value of
106 familylang, stylelang, and fullnamelang
107 prgname String String Name of the running program
108 postscriptname String Font family name in PostScript
109 FONT MATCHING
113 Fontconfig performs matching by measuring the distance from a provided
114 pattern to all of the available fonts in the system. The closest match‐
115 ing font is selected. This ensures that a font will always be returned,
116 but doesn't ensure that it is anything like the requested pattern.
117 Font matching starts with an application constructed pattern. The
119 desired attributes of the resulting font are collected together in a
120 pattern. Each property of the pattern can contain one or more values;
121 these are listed in priority order; matches earlier in the list are
122 considered "closer" than matches later in the list.
123 The initial pattern is modified by applying the list of editing
125 instructions specific to patterns found in the configuration; each con‐
126 sists of a match predicate and a set of editing operations. They are
127 executed in the order they appeared in the configuration. Each match
128 causes the associated sequence of editing operations to be applied.
129 After the pattern has been edited, a sequence of default substitutions
131 are performed to canonicalize the set of available properties; this
132 avoids the need for the lower layers to constantly provide default val‐
133 ues for various font properties during rendering.
134 The canonical font pattern is finally matched against all available
136 fonts. The distance from the pattern to the font is measured for each
137 of several properties: foundry, charset, family, lang, spacing, pixel‐
138 size, style, slant, weight, antialias, rasterizer and outline. This
139 list is in priority order -- results of comparing earlier elements of
140 this list weigh more heavily than later elements.
141 There is one special case to this rule; family names are split into two
143 bindings; strong and weak. Strong family names are given greater prece‐
144 dence in the match than lang elements while weak family names are given
145 lower precedence than lang elements. This permits the document language
146 to drive font selection when any document specified font is unavail‐
147 able.
148 The pattern representing that font is augmented to include any proper‐
150 ties found in the pattern but not found in the font itself; this per‐
151 mits the application to pass rendering instructions or any other data
152 through the matching system. Finally, the list of editing instructions
153 specific to fonts found in the configuration are applied to the pat‐
154 tern. This modified pattern is returned to the application.
155 The return value contains sufficient information to locate and raster‐
157 ize the font, including the file name, pixel size and other rendering
158 data. As none of the information involved pertains to the FreeType
159 library, applications are free to use any rasterization engine or even
160 to take the identified font file and access it directly.
161 The match/edit sequences in the configuration are performed in two
163 passes because there are essentially two different operations necessary
164 -- the first is to modify how fonts are selected; aliasing families and
165 adding suitable defaults. The second is to modify how the selected
166 fonts are rasterized. Those must apply to the selected font, not the
167 original pattern as false matches will often occur.
168 FONT NAMES
170 Fontconfig provides a textual representation for patterns that the
171 library can both accept and generate. The representation is in three
172 parts, first a list of family names, second a list of point sizes and
173 finally a list of additional properties:
174 <families>-<point sizes>:<name1>=<values1>:<name2>=<values2>...
176 Values in a list are separated with commas. The name needn't include
180 either families or point sizes; they can be elided. In addition, there
181 are symbolic constants that simultaneously indicate both a name and a
182 value. Here are some examples:
183 Name Meaning
185 ----------------------------------------------------------
186 Times-12 12 point Times Roman
187 Times-12:bold 12 point Times Bold
188 Courier:italic Courier Italic in the default size
189 Monospace:matrix=1 .1 0 1 The users preferred monospace font
190 with artificial obliquing
191 The '\', '-', ':' and ',' characters in family names must be preceded
195 by a '\' character to avoid having them misinterpreted. Similarly, val‐
196 ues containing '\', '=', '_', ':' and ',' must also have them preceded
197 by a '\' character. The '\' characters are stripped out of the family
198 name and values as the font name is read.
199
201 To help diagnose font and applications problems, fontconfig is built
202 with a large amount of internal debugging left enabled. It is con‐
203 trolled by means of the FC_DEBUG environment variable. The value of
204 this variable is interpreted as a number, and each bit within that
205 value controls different debugging messages.
206 Name Value Meaning
208 ---------------------------------------------------------
209 MATCH 1 Brief information about font matching
210 MATCHV 2 Extensive font matching information
211 EDIT 4 Monitor match/test/edit execution
212 FONTSET 8 Track loading of font information at startup
213 CACHE 16 Watch cache files being written
214 CACHEV 32 Extensive cache file writing information
215 PARSE 64 (no longer in use)
216 SCAN 128 Watch font files being scanned to build caches
217 SCANV 256 Verbose font file scanning information
218 MEMORY 512 Monitor fontconfig memory usage
219 CONFIG 1024 Monitor which config files are loaded
220 LANGSET 2048 Dump char sets used to construct lang values
221 MATCH2 4096 Display font-matching transformation in patterns
222 Add the value of the desired debug levels together and assign that (in
226 base 10) to the FC_DEBUG environment variable before running the appli‐
227 cation. Output from these statements is sent to stdout.
228
230 Each font in the database contains a list of languages it supports.
231 This is computed by comparing the Unicode coverage of the font with the
232 orthography of each language. Languages are tagged using an RFC-3066
233 compatible naming and occur in two parts -- the ISO 639 language tag
234 followed a hyphen and then by the ISO 3166 country code. The hyphen and
235 country code may be elided.
236 Fontconfig has orthographies for several languages built into the
238 library. No provision has been made for adding new ones aside from
239 rebuilding the library. It currently supports 122 of the 139 languages
240 named in ISO 639-1, 141 of the languages with two-letter codes from ISO
241 639-2 and another 30 languages with only three-letter codes. Languages
242 with both two and three letter codes are provided with only the two
243 letter code.
244 For languages used in multiple territories with radically different
246 character sets, fontconfig includes per-territory orthographies. This
247 includes Azerbaijani, Kurdish, Pashto, Tigrinya and Chinese.
248
250 Configuration files for fontconfig are stored in XML format; this for‐
251 mat makes external configuration tools easier to write and ensures that
252 they will generate syntactically correct configuration files. As XML
253 files are plain text, they can also be manipulated by the expert user
254 using a text editor.
255 The fontconfig document type definition resides in the external entity
257 "fonts.dtd"; this is normally stored in the default font configuration
258 directory (/etc/fonts). Each configuration file should contain the fol‐
259 lowing structure:
260 <?xml version="1.0"?>
262 <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
263 <fontconfig>
264 ...
265 </fontconfig>
266 <FONTCONFIG>
270 This is the top level element for a font configuration and can contain
271 <dir>, <cachedir>, <include>, <match> and <alias> elements in any
272 order.
273 <DIR PREFIX="DEFAULT">
275 This element contains a directory name which will be scanned for font
276 files to include in the set of available fonts. If 'prefix' is set to
277 "xdg", the value in the XDG_DATA_HOME environment variable will be
278 added as the path prefix. please see XDG Base Directory Specification
279 for more details.
280 <CACHEDIR PREFIX="DEFAULT">
282 This element contains a directory name that is supposed to be stored or
283 read the cache of font information. If multiple elements are specified
284 in the configuration file, the directory that can be accessed first in
285 the list will be used to store the cache files. If it starts with '~',
286 it refers to a directory in the users home directory. If 'prefix' is
287 set to "xdg", the value in the XDG_CACHE_HOME environment variable will
288 be added as the path prefix. please see XDG Base Directory Specifica‐
289 tion for more details. The default directory is
290 ``$XDG_CACHE_HOME/fontconfig'' and it contains the cache files named
291 ``<hash value>-<architecture>.cache-<version>'', where <version> is the
292 fontconfig cache file version number (currently 7).
293 <INCLUDE IGNORE_MISSING="NO" PREFIX="DEFAULT">
295 This element contains the name of an additional configuration file or
296 directory. If a directory, every file within that directory starting
297 with an ASCII digit (U+0030 - U+0039) and ending with the string
298 ``.conf'' will be processed in sorted order. When the XML datatype is
299 traversed by FcConfigParse, the contents of the file(s) will also be
300 incorporated into the configuration by passing the filename(s) to
301 FcConfigLoadAndParse. If 'ignore_missing' is set to "yes" instead of
302 the default "no", a missing file or directory will elicit no warning
303 message from the library. If 'prefix' is set to "xdg", the value in the
304 XDG_CONFIG_HOME environment variable will be added as the path prefix.
305 please see XDG Base Directory Specification for more details.
306 <CONFIG>
308 This element provides a place to consolidate additional configuration
309 information. <config> can contain <blank> and <rescan> elements in any
310 order.
311 <BLANK>
313 Fonts often include "broken" glyphs which appear in the encoding but
314 are drawn as blanks on the screen. Within the <blank> element, place
315 each Unicode characters which is supposed to be blank in an <int> ele‐
316 ment. Characters outside of this set which are drawn as blank will be
317 elided from the set of characters supported by the font.
318 <RESCAN>
320 The <rescan> element holds an <int> element which indicates the default
321 interval between automatic checks for font configuration changes.
322 Fontconfig will validate all of the configuration files and directories
323 and automatically rebuild the internal datastructures when this inter‐
324 val passes.
325 <SELECTFONT>
327 This element is used to black/white list fonts from being listed or
328 matched against. It holds acceptfont and rejectfont elements.
329 <ACCEPTFONT>
331 Fonts matched by an acceptfont element are "whitelisted"; such fonts
332 are explicitly included in the set of fonts used to resolve list and
333 match requests; including them in this list protects them from being
334 "blacklisted" by a rejectfont element. Acceptfont elements include glob
335 and pattern elements which are used to match fonts.
336 <REJECTFONT>
338 Fonts matched by an rejectfont element are "blacklisted"; such fonts
339 are excluded from the set of fonts used to resolve list and match
340 requests as if they didn't exist in the system. Rejectfont elements
341 include glob and pattern elements which are used to match fonts.
342 <GLOB>
344 Glob elements hold shell-style filename matching patterns (including ?
345 and *) which match fonts based on their complete pathnames. This can be
346 used to exclude a set of directories (/usr/share/fonts/uglyfont*), or
347 particular font file types (*.pcf.gz), but the latter mechanism relies
348 rather heavily on filenaming conventions which can't be relied upon.
349 Note that globs only apply to directories, not to individual fonts.
350 <PATTERN>
352 Pattern elements perform list-style matching on incoming fonts; that
353 is, they hold a list of elements and associated values. If all of those
354 elements have a matching value, then the pattern matches the font. This
355 can be used to select fonts based on attributes of the font (scalable,
356 bold, etc), which is a more reliable mechanism than using file exten‐
357 sions. Pattern elements include patelt elements.
358 <PATELT NAME="PROPERTY">
360 Patelt elements hold a single pattern element and list of values. They
361 must have a 'name' attribute which indicates the pattern element name.
362 Patelt elements include int, double, string, matrix, bool, charset and
363 const elements.
364 <MATCH TARGET="PATTERN">
366 This element holds first a (possibly empty) list of <test> elements and
367 then a (possibly empty) list of <edit> elements. Patterns which match
368 all of the tests are subjected to all the edits. If 'target' is set to
369 "font" instead of the default "pattern", then this element applies to
370 the font name resulting from a match rather than a font pattern to be
371 matched. If 'target' is set to "scan", then this element applies when
372 the font is scanned to build the fontconfig database.
373 <TEST QUAL="ANY" NAME="PROPERTY" TARGET="DEFAULT" COMPARE="EQ">
375 This element contains a single value which is compared with the target
376 ('pattern', 'font', 'scan' or 'default') property "property" (substi‐
377 tute any of the property names seen above). 'compare' can be one of
378 "eq", "not_eq", "less", "less_eq", "more", "more_eq", "contains" or
379 "not_contains". 'qual' may either be the default, "any", in which case
380 the match succeeds if any value associated with the property matches
381 the test value, or "all", in which case all of the values associated
382 with the property must match the test value. 'ignore-blanks' takes a
383 boolean value. if 'ignore-blanks' is set "true", any blanks in the
384 string will be ignored on its comparison. this takes effects only when
385 compare="eq" or compare="not_eq". When used in a <match target="font">
386 element, the target= attribute in the <test> element selects between
387 matching the original pattern or the font. "default" selects whichever
388 target the outer <match> element has selected.
389 <EDIT NAME="PROPERTY" MODE="ASSIGN" BINDING="WEAK">
391 This element contains a list of expression elements (any of the value
392 or operator elements). The expression elements are evaluated at run-
393 time and modify the property "property". The modification depends on
394 whether "property" was matched by one of the associated <test> ele‐
395 ments, if so, the modification may affect the first matched value. Any
396 values inserted into the property are given the indicated binding
397 ("strong", "weak" or "same") with "same" binding using the value from
398 the matched pattern element. 'mode' is one of:
399 Mode With Match Without Match
401 ---------------------------------------------------------------------
402 "assign" Replace matching value Replace all values
403 "assign_replace" Replace all values Replace all values
404 "prepend" Insert before matching Insert at head of list
405 "prepend_first" Insert at head of list Insert at head of list
406 "append" Append after matching Append at end of list
407 "append_last" Append at end of list Append at end of list
408 "delete" Delete matching value Delete all values
409 "delete_all" Delete all values Delete all values
410 <INT>, <DOUBLE>, <STRING>, <BOOL>
414 These elements hold a single value of the indicated type. <bool> ele‐
415 ments hold either true or false. An important limitation exists in the
416 parsing of floating point numbers -- fontconfig requires that the man‐
417 tissa start with a digit, not a decimal point, so insert a leading zero
418 for purely fractional values (e.g. use 0.5 instead of .5 and -0.5
419 instead of -.5).
420 <MATRIX>
422 This element holds four numerical expressions of an affine transforma‐
423 tion. At their simplest these will be four <double> elements but they
424 can also be more involved expressions.
425 <RANGE>
427 This element holds the two <int> elements of a range representation.
428 <CHARSET>
430 This element holds at least one <int> element of an Unicode code point
431 or more.
432 <LANGSET>
434 This element holds at least one <string> element of a RFC-3066-style
435 languages or more.
436 <NAME>
438 Holds a property name. Evaluates to the first value from the property
439 of the pattern. If the 'target' attribute is not present, it will
440 default to 'default', in which case the property is returned from the
441 font pattern during a target="font" match, and to the pattern during a
442 target="pattern" match. The attribute can also take the values 'font'
443 or 'pattern' to explicitly choose which pattern to use. It is an error
444 to use a target of 'font' in a match that has target="pattern".
445 <CONST>
447 Holds the name of a constant; these are always integers and serve as
448 symbolic names for common font values:
449 Constant Property Value
451 -------------------------------------
452 thin weight 0
453 extralight weight 40
454 ultralight weight 40
455 light weight 50
456 demilight weight 55
457 semilight weight 55
458 book weight 75
459 regular weight 80
460 normal weight 80
461 medium weight 100
462 demibold weight 180
463 semibold weight 180
464 bold weight 200
465 extrabold weight 205
466 black weight 210
467 heavy weight 210
468 roman slant 0
469 italic slant 100
470 oblique slant 110
471 ultracondensed width 50
472 extracondensed width 63
473 condensed width 75
474 semicondensed width 87
475 normal width 100
476 semiexpanded width 113
477 expanded width 125
478 extraexpanded width 150
479 ultraexpanded width 200
480 proportional spacing 0
481 dual spacing 90
482 mono spacing 100
483 charcell spacing 110
484 unknown rgba 0
485 rgb rgba 1
486 bgr rgba 2
487 vrgb rgba 3
488 vbgr rgba 4
489 none rgba 5
490 lcdnone lcdfilter 0
491 lcddefault lcdfilter 1
492 lcdlight lcdfilter 2
493 lcdlegacy lcdfilter 3
494 hintnone hintstyle 0
495 hintslight hintstyle 1
496 hintmedium hintstyle 2
497 hintfull hintstyle 3
498 <OR>, <AND>, <PLUS>, <MINUS>, <TIMES>, <DIVIDE>
502 These elements perform the specified operation on a list of expression
503 elements. <or> and <and> are boolean, not bitwise.
504 <EQ>, <NOT_EQ>, <LESS>, <LESS_EQ>, <MORE>, <MORE_EQ>, <CONTAINS>, <NOT_CON‐
506 TAINS
507 These elements compare two values, producing a boolean result.
508 <NOT>
510 Inverts the boolean sense of its one expression element
511 <IF>
513 This element takes three expression elements; if the value of the first
514 is true, it produces the value of the second, otherwise it produces the
515 value of the third.
516 <ALIAS>
518 Alias elements provide a shorthand notation for the set of common match
519 operations needed to substitute one font family for another. They con‐
520 tain a <family> element followed by optional <prefer>, <accept> and
521 <default> elements. Fonts matching the <family> element are edited to
522 prepend the list of <prefer>ed families before the matching <family>,
523 append the <accept>able families after the matching <family> and append
524 the <default> families to the end of the family list.
525 <FAMILY>
527 Holds a single font family name
528 <PREFER>, <ACCEPT>, <DEFAULT>
530 These hold a list of <family> elements to be used by the <alias> ele‐
531 ment.
532
534 SYSTEM CONFIGURATION FILE
535 This is an example of a system-wide configuration file
536 <?xml version="1.0"?>
538 <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
539 <!-- /etc/fonts/fonts.conf file to configure system font access -->
540 <fontconfig>
541 <!--
542 Find fonts in these directories
543 -->
544 <dir>/usr/share/fonts</dir>
545 <dir>/usr/X11R6/lib/X11/fonts</dir>
546 <!--
548 Accept deprecated 'mono' alias, replacing it with 'monospace'
549 -->
550 <match target="pattern">
551 <test qual="any" name="family"><string>mono</string></test>
552 <edit name="family" mode="assign"><string>monospace</string></edit>
553 </match>
554 <!--
556 Names not including any well known alias are given 'sans-serif'
557 -->
558 <match target="pattern">
559 <test qual="all" name="family" compare="not_eq"><string>sans-serif</string></test>
560 <test qual="all" name="family" compare="not_eq"><string>serif</string></test>
561 <test qual="all" name="family" compare="not_eq"><string>monospace</string></test>
562 <edit name="family" mode="append_last"><string>sans-serif</string></edit>
563 </match>
564 <!--
566 Load per-user customization file, but don't complain
567 if it doesn't exist
568 -->
569 <include ignore_missing="yes" prefix="xdg">fontconfig/fonts.conf</include>
570 <!--
572 Load local customization files, but don't complain
573 if there aren't any
574 -->
575 <include ignore_missing="yes">conf.d</include>
576 <include ignore_missing="yes">local.conf</include>
577 <!--
579 Alias well known font names to available TrueType fonts.
580 These substitute TrueType faces for similar Type1
581 faces to improve screen appearance.
582 -->
583 <alias>
584 <family>Times</family>
585 <prefer><family>Times New Roman</family></prefer>
586 <default><family>serif</family></default>
587 </alias>
588 <alias>
589 <family>Helvetica</family>
590 <prefer><family>Arial</family></prefer>
591 <default><family>sans</family></default>
592 </alias>
593 <alias>
594 <family>Courier</family>
595 <prefer><family>Courier New</family></prefer>
596 <default><family>monospace</family></default>
597 </alias>
598 <!--
600 Provide required aliases for standard names
601 Do these after the users configuration file so that
602 any aliases there are used preferentially
603 -->
604 <alias>
605 <family>serif</family>
606 <prefer><family>Times New Roman</family></prefer>
607 </alias>
608 <alias>
609 <family>sans</family>
610 <prefer><family>Arial</family></prefer>
611 </alias>
612 <alias>
613 <family>monospace</family>
614 <prefer><family>Andale Mono</family></prefer>
615 </alias>
616 <--
618 The example of the requirements of OR operator;
619 If the 'family' contains 'Courier New' OR 'Courier'
620 add 'monospace' as the alternative
621 -->
622 <match target="pattern">
623 <test name="family" compare="eq">
624 <string>Courier New</string>
625 </test>
626 <edit name="family" mode="prepend">
627 <string>monospace</string>
628 </edit>
629 </match>
630 <match target="pattern">
631 <test name="family" compare="eq">
632 <string>Courier</string>
633 </test>
634 <edit name="family" mode="prepend">
635 <string>monospace</string>
636 </edit>
637 </match>
638 </fontconfig>
640 USER CONFIGURATION FILE
644 This is an example of a per-user configuration file that lives in
645 $XDG_CONFIG_HOME/fontconfig/fonts.conf
646 <?xml version="1.0"?>
648 <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
649 <!-- $XDG_CONFIG_HOME/fontconfig/fonts.conf for per-user font configuration -->
650 <fontconfig>
651 <!--
653 Private font directory
654 -->
655 <dir prefix="xdg">fonts</dir>
656 <!--
658 use rgb sub-pixel ordering to improve glyph appearance on
659 LCD screens. Changes affecting rendering, but not matching
660 should always use target="font".
661 -->
662 <match target="font">
663 <edit name="rgba" mode="assign"><const>rgb</const></edit>
664 </match>
665 <!--
666 use WenQuanYi Zen Hei font when serif is requested for Chinese
667 -->
668 <match>
669 <!--
670 If you don't want to use WenQuanYi Zen Hei font for zh-tw etc,
671 you can use zh-cn instead of zh.
672 Please note, even if you set zh-cn, it still matches zh.
673 if you don't like it, you can use compare="eq"
674 instead of compare="contains".
675 -->
676 <test name="lang" compare="contains">
677 <string>zh</string>
678 </test>
679 <test name="family">
680 <string>serif</string>
681 </test>
682 <edit name="family" mode="prepend">
683 <string>WenQuanYi Zen Hei</string>
684 </edit>
685 </match>
686 <!--
687 use VL Gothic font when sans-serif is requested for Japanese
688 -->
689 <match>
690 <test name="lang" compare="contains">
691 <string>ja</string>
692 </test>
693 <test name="family">
694 <string>sans-serif</string>
695 </test>
696 <edit name="family" mode="prepend">
697 <string>VL Gothic</string>
698 </edit>
699 </match>
700 </fontconfig>
701
705 fonts.conf contains configuration information for the fontconfig
706 library consisting of directories to look at for font information as
707 well as instructions on editing program specified font patterns before
708 attempting to match the available fonts. It is in XML format.
709 conf.d is the conventional name for a directory of additional configu‐
711 ration files managed by external applications or the local administra‐
712 tor. The filenames starting with decimal digits are sorted in lexico‐
713 graphic order and used as additional configuration files. All of these
714 files are in XML format. The master fonts.conf file references this
715 directory in an <include> directive.
716 fonts.dtd is a DTD that describes the format of the configuration
718 files.
719 $XDG_CONFIG_HOME/fontconfig/conf.d and ~/.fonts.conf.d is the conven‐
721 tional name for a per-user directory of (typically auto-generated) con‐
722 figuration files, although the actual location is specified in the
723 global fonts.conf file. please note that ~/.fonts.conf.d is deprecated
724 now. it will not be read by default in the future version.
725 $XDG_CONFIG_HOME/fontconfig/fonts.conf and ~/.fonts.conf is the conven‐
727 tional location for per-user font configuration, although the actual
728 location is specified in the global fonts.conf file. please note that
729 ~/.fonts.conf is deprecated now. it will not be read by default in the
730 future version.
731 $XDG_CACHE_HOME/fontconfig/*.cache-* and ~/.fontconfig/*.cache-* is
733 the conventional repository of font information that isn't found in the
734 per-directory caches. This file is automatically maintained by fontcon‐
735 fig. please note that ~/.fontconfig/*.cache-* is deprecated now. it
736 will not be read by default in the future version.
737
739 FONTCONFIG_FILE is used to override the default configuration file.
740 FONTCONFIG_PATH is used to override the default configuration direc‐
742 tory.
743 FONTCONFIG_SYSROOT is used to set a default sysroot directory.
745 FC_DEBUG is used to output the detailed debugging messages. see Debug‐
747 ging Applications section for more details.
748 FC_DBG_MATCH_FILTER is used to filter out the patterns. this takes a
750 comma-separated list of object names and effects only when FC_DEBUG has
751 MATCH2. see Debugging Applications section for more details.
752 FC_LANG is used to specify the default language as the weak binding in
754 the query. if this isn't set, the default language will be determined
755 from current locale.
756 FONTCONFIG_USE_MMAP is used to control the use of mmap(2) for the cache
758 files if available. this take a boolean value. fontconfig will checks
759 if the cache files are stored on the filesystem that is safe to use
760 mmap(2). explicitly setting this environment variable will causes skip‐
761 ping this check and enforce to use or not use mmap(2) anyway.
762 SOURCE_DATE_EPOCH is used to ensure fc-cache(1) generates files in a
764 deterministic manner in order to support reproducible builds. When set
765 to a numeric representation of UNIX timestamp, fontconfig will prefer
766 this value over using the modification timestamps of the input files in
767 order to identify which cache files require regeneration. If
768 SOURCE_DATE_EPOCH is not set (or is newer than the mtime of the direc‐
769 tory), the existing behaviour is unchanged.
770
772 fc-cat(1), fc-cache(1), fc-list(1), fc-match(1), fc-query(1),
773 SOURCE_DATE_EPOCH <URL:https://reproducible-builds.org/specs/source-
774 date-epoch/>.
775
777 Fontconfig version 2.13.1
778 30 8月 2018 FONTS-CONF(5)