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| -rw-r--r-- | doc/luaotfload.conf.rst | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/doc/luaotfload.conf.rst b/doc/luaotfload.conf.rst index 2a339ce..12dd887 100644 --- a/doc/luaotfload.conf.rst +++ b/doc/luaotfload.conf.rst @@ -276,6 +276,8 @@ Section ``run`` +------------------+--------+------------------------------+ | resolver | s | ``"cached"`` | +------------------+--------+------------------------------+ +| fontloader | s | ``"default"`` | ++------------------+--------+------------------------------+ The ``color-callback`` option determines the stage at which fonts that defined with a ``color=xxyyzz`` feature will be colorized. By default @@ -294,6 +296,29 @@ 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 fontloader backend can be selected by setting the value of +``fontloader``. Other than the default, which selects the packaged +``reference`` loader as shipped with Luaotfload, a file name accessible +by kpathsea can be specified. Alternatively, the individual files that +constitute the fontloader can be loaded directly. While less efficient, +this greatly aids debugging since error messages will reference the +actual line numbers of the source files and explanatory comments are +not stripped. Currently, three distinct loading strategies are +available: ``unpackaged`` will load the batch that is part of +Luaotfload. These contain the identical source code that the reference +fontloader has been compiled from. Another option, ``context`` will +attempt to load the same files by their names in the Context format +from the search path. Consequently this option allows to use the +version of Context that comes with the TeX distribution. Distros tend +to prefer the stable version (“current” in Context jargon) of those +files so certain bugs encountered in the more bleeding edge Luaotfload +can be avoided this way. A third option is to use ``context`` with a +colon to specify a directory prefix where the *TEXMF* is located that +the files should be loaded from, e. g. ``context:~/context/tex/texmf-context``. +This can be used when referencing another distribution like the Context +minimals that is installed under a different path not indexed by +kpathsea. + 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. |