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       luaotfload.conf - Luaotfload configuration file


       · ./luaotfload{.conf,rc}

       · XDG_CONFIG_HOME/luaotfload/luaotfload{.conf,rc}

       · ~/.luaotfloadrc


       The file luaotfload.conf contains configuration options for Luaotfload,
       a font loading and font management component for LuaTeX.


       A small Luaotfload configuration file  with  few  customizations  could
       look as follows:

              formats = afm, pfa, pfb
              compress = false

              termwidth = 60

              log-level = 6

       This  will  make Luaotfload ignore all font files except for PostScript
       formats. NB: With a default Tex Live install the  PS  fonts  will  take
       much  longer  to  index  than  OpenType  or  TrueType  ones.  Also,  an
       uncompressed index file will be dumped which is going to be much larger
       due  to the huge amount of PostScript fonts indexed. The terminal width
       is truncated to 60  characters  which  influences  the  verbose  output
       during indexing. Finally, the verbosity is increased greatly: each font
       file being processed will be printed to the stdout on a separate  line,
       along with lots of other information.

       To   observe   the  difference  in  behavior,  save  above  snippet  to
       ./luaotfload.conf and update the font index:

          luaotfload --update --force


       The configuration file syntax follows the common INI format. For a more
       detailed  description  please refer to the section “CONFIGURATION FILE”
       of git-config(1). A brief list of rules is given below:

          · Blank lines and lines starting with a semicolon (;) are ignored.

          · A  configuration  file  is  partitioned  into  sections  that  are
            declared by specifying the section title in brackets on a separate

                ... section content ...

          · Sections consist of one or more variable assignments of  the  form
            variable-name = value  E. g.:

                    bar = baz
                    quux = xyzzy

          · Section   and  variable  names  may  contain  only  uppercase  and
            lowercase letters as well as dashes (-).


       Variables in belong into a configuration section and their values  must
       be  of  a  certain  type.  Some  of  them have further constraints. For
       example, the “color callback” must be a string of  one  of  the  values
       pre_linebreak_filter or pre_output_filter, defined in the section run.

       Currently, the configuration is organized into four sections:

       db     Options relating to the font index.

       misc   Options without a clearly defined category.

       paths  Path and file name settings.

       run    Options controlling runtime behavior of Luaotfload.

       The  list  of  valid variables, the sections they are part of and their
       type is given below. Types represent Lua types that the values must  be
       convertible to; they are abbreviated as follows: s for the string type,
       n for number, b for boolean. A value  of  nil  means  the  variable  is

   Section db
                     │variable    │ type │ default             │
                     │compress    │ b    │ true                │
                     │formats     │ s    │ "otf,ttf,ttc,dfont" │
                     │max-fonts   │ n    │ 2^51                │
                     │scan-local  │ b    │ false               │
                     │skip-read   │ b    │ false               │
                     │strip       │ b    │ true                │
                     │update-live │ b    │ true                │

       The   flag   compress   determines  whether  the  font  index  (usually
       luaotfload-names.lua[.gz] will be stored in compressed forms.  If unset
       it is equivalent of passing --no-compress to luaotfload-tool. Since the
       file is only created for convenience and has no effect on  the  runtime
       behavior  of  Luaotfload, the flag should remain set. Most editors come
       with zlib support anyways.

       The list of formats must be  a  comma  separated  sequence  of  strings
       containing one or more of these elements:

       · otf               (OpenType format),

       · ttf and ttc   (TrueType format),

       · dfont             (Macintosh TrueType format),

       · afm               (Adobe Font Metrics),

       · pfb and pfa   (PostScript format).

       It  corresponds  loosely  to  the  --formats option to luaotfload-tool.
       Invalid or duplicate members are ignored; if the list does not  contain
       any  useful  identifiers,  the default list "otf,ttf,ttc,dfont" will be

       The variable max-fonts determines after processing how many font  files
       the  font  scanner  will  terminate  the  search.  This  is  useful for
       debugging issues with the font index and has the  same  effect  as  the
       option --max-fonts to luaotfload-tools.

       The  scan-local  flag,  if  set,  will  incorporate the current working
       directory as a font search location. NB:  This  will  potentially  slow
       down document processing because a font index with local fonts will not
       be saved to disk, so these fonts will have to  be  re-indexed  whenever
       the document is built.

       The  skip-read  flag  is only useful for debugging: It makes Luaotfload
       skip reading fonts. The font information for rebuilding  the  index  is
       taken from the presently existing one.

       Unsetting  the  strip  flag prevents Luaotfload from removing data from
       the index that is only useful when processing font files. NB: this  can
       increase the size of the index files significantly and has no effect on
       the runtime behavior.

       If update-live is set, Luaotfload will reload the database if it cannot
       find  a  requested  font.  Those  who  prefer  to update manually using
       luaotfload-tool should unset this flag.

   Section default-features
       By default Luaotfload enables node mode  and  picks  the  default  font
       features  that  are  prescribed in the OpenType standard. This behavior
       may be overridden in the default-features section. Global defaults that
       will  be  applied  for  all  scripts  can be set via the global option,
       others by the script they are to be applied to. For example, a  setting

              global = mode=base,color=0000FF
              dflt   = smcp,onum

       would  force base mode, tint all fonts blue and activate small capitals
       and text figures globally. Features are specified as a comma  separated
       list  of  variables  or  variable-value  pairs.  Variables  without  an
       explicit value are set to true.

   Section misc
                          │variable   │ type │ default     │
                          │statistics │ b    │ false       │
                          │termwidth  │ n    │ nil         │
                          │version    │ s    │ <Luaotfload │
                          │           │      │ version>    │

       With  statistics  enabled,  extra  statistics  will be collected during
       index creation and appended to the index file. It may then  be  queried
       at the Lua end or inspected by reading the file itself.

       The  value  of  termwidth,  if  set,  overrides  the value retrieved by
       querying the properties of the terminal in which Luatex runs.  This  is
       useful  if  the  engine  runs with shell_escape disabled and the actual
       terminal dimensions cannot be retrieved.

       The value of version is derived from the version string  hard-coded  in
       the Luaotfload source. Override at your own risk.

   Section paths
                │variable     │ type │ default                       │
                │cache-dir    │ s    │ "fonts"                       │
                │names-dir    │ s    │ "names"                       │
                │index-file   │ s    │ "luaotfload-names.lua"        │
                │lookups-file │ s    │ "luaotfload-lookup-cache.lua" │

       The paths cache-dir and names-dir determine the subdirectory inside the
       Luaotfload subtree of the luatex-cache directory where the  font  cache
       and the font index will be stored, respectively.

       Inside  the  index  directory, the names of the index file and the font
       lookup cache will be derived from the respective values  of  index-file
       and  lookups-file.  This is the filename base for the bytecode compiled
       version as well as -- for the index -- the gzipped version.

   Section run
                  │variable       │ type │ default                │
                  │color-callback │ s    │ "pre_linebreak_filter" │
                  │definer        │ s    │ "patch"                │
                  │log-level      │ n    │ 0                      │
                  │resolver       │ s    │ "cached"               │

       The  color-callback  option  determines  the  stage at which fonts that
       defined with a color=xxyyzz feature will be colorized. By default  this
       happens    in    a    pre_linebreak_filter    but   alternatively   the
       pre_output_filter may be chosen, which  is  faster  but  might  produce
       inconsistent  output. The latter also was the default in the 1.x series
       of Luaotfload.

       The definer allows for switching the define_font callback.  Apart  from
       the  default  patch one may also choose the generic one that comes with
       the vanilla  fontloader.  Beware  that  this  might  break  tools  like
       Fontspect  that  rely on the patch_font callback provided by Luaotfload
       to perform important corrections on font data.

       The value of log-level sets the default verbosity of  messages  printed
       by  Luaotfload.  Only messages defined with a verbosity of less than or
       equal to the supplied value will be output on the terminal.  At  a  log
       level  of  five  Luaotfload  can be very noisy. Also, printing too many
       messages will slow down the interpreter due  to  line  buffering  being
       disabled (see setbuf(3)).

       The resolver setting allows choosing the font name resolution function:
       With the  default  value  cached  Luaotfload  saves  the  result  of  a
       successful  font  name  request  to a cache file to speed up subsequent
       lookups. The alternative, normal circumvents  the  cache  and  resolves
       every  request  individually.  (Since  to the restructuring of the font
       name index in Luaotfload 2.4 the  performance  difference  between  the
       cached and uncached lookups should be marginal.)


       Luaotfload only processes the first configuration file it encounters at
       one  of  the  search  locations.  The   file   name   may   be   either
       luaotfload.conf  or  luaotfloadrc, except for the dotfile in the user’s
       home directory which is expected at ~/.luaotfloadrc.

       Configuration files are located following a series of steps. The search
       terminates  as  soon as a suitable file is encountered. The sequence of
       locations that Luaotfload looks at is

       i.   The current working directory of the LuaTeX process.

       ii.  The subdirectory luaotfload/ inside the XDG configuration tree, e.
            g. /home/oenothea/config/luaotfload/.

       iii. The dotfile.

       iv.  The TEXMF (using kpathsea).


       luaotfload-tool(1), luatex(1), lua(1)

       · texdoc  luaotfload  to  display  the  PDF  manual  for the Luaotfload

       · Luaotfload development

       · LuaLaTeX mailing list

       · LuaTeX       

       · Luaotfload on CTAN


       · The               XDG               base                specification


       Luaotfload   is   maintained   by   the   LuaLaTeX    dev    team    (‐

       This    manual    page    was    written    by    Philipp   Gesang   <‐>.


       GPL v2.0

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