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|
-----------------------------------------------------------------------
-- FILE: luaotfload-main.lua
-- DESCRIPTION: OpenType layout system / luaotfload entry point
-- REQUIREMENTS: luatex v.0.95.0 or later; package lualibs
-- AUTHOR: Élie Roux, Khaled Hosny, Philipp Gesang, Ulrike Fischer, Marcel Krüger
-----------------------------------------------------------------------
local authors = "\z
Hans Hagen,\z
Khaled Hosny,\z
Elie Roux,\z
Will Robertson,\z
Philipp Gesang,\z
Dohyun Kim,\z
Reuben Thomas,\z
David Carlisle,\
Ulrike Fischer,\z
Marcel Krüger\z
"
-- version number is used below!
local ProvidesLuaModule = {
name = "luaotfload-main",
version = "3.00", --TAGVERSION
date = "2019-09-13", --TAGDATE
description = "luaotfload entry point",
author = authors,
copyright = authors,
license = "GPL v2.0"
}
if luatexbase and luatexbase.provides_module then
luatexbase.provides_module (ProvidesLuaModule)
end
local osgettimeofday = os.gettimeofday
config = config or { }
luaotfload = luaotfload or { }
local luaotfload = luaotfload
luaotfload.log = luaotfload.log or { }
luaotfload.version = ProvidesLuaModule.version
luaotfload.loaders = { }
luaotfload.min_luatex_version = { 0, 95, 0 }
luaotfload.fontloader_package = "reference" --- default: from current Context
if not tex or not tex.luatexversion then
error "this program must be run in TeX mode" --- or call tex.initialize() =)
else
--- version check
local major = tex.luatexversion / 100
local minor = tex.luatexversion % 100
local revision = tex.luatexrevision --[[ : string ]]
local revno = tonumber (revision)
local minimum = luaotfload.min_luatex_version
local actual = { major, minor, revno or 0 }
if actual [1] < minimum [1]
or actual == minimum and actual [2] < minimum [2]
or actual == minimum and actual [2] == minimum [2] and actual [3] < minimum [3]
then
texio.write_nl ("term and log",
string.format ("\tFATAL ERROR\n\z
\tLuaotfload requires a Luatex version >= %d.%d.%d.\n\z
\tPlease update your TeX distribution!\n\n",
(unpack or table.unpack) (minimum)))
error "version check failed"
end
end
if status.safer_option ~= 0 then
texio.write_nl("term and log","luaotfload can't run with option --safer. Aborting")
error("safer_option used")
end
--[[doc--
This file initializes the system and loads the font loader. To
minimize potential conflicts between other packages and the code
imported from \CONTEXT, several precautions are in order. Some of
the functionality that the font loader expects to be present, like
raw access to callbacks, are assumed to have been disabled by
\identifier{luatexbase} when this file is processed. In some cases
it is possible to trick it by putting dummies into place and
restoring the behavior from \identifier{luatexbase} after
initilization. Other cases such as attribute allocation require
that we hook the functionality from \identifier{luatexbase} into
locations where they normally wouldn’t be.
Anyways we can import the code base without modifications, which is
due mostly to the extra effort by Hans Hagen to make \LUATEX-Fonts
self-contained and encapsulate it, and especially due to his
willingness to incorporate our suggestions.
--doc]]--
local luatexbase = luatexbase
local require = require
local type = type
--[[doc--
\subsection{Module loading}
We load the files imported from \CONTEXT with function derived this way. It
automatically prepends a prefix to its argument, so we can refer to the
files with their actual \CONTEXT name.
--doc]]--
local make_loader_name = function (prefix, name)
local msg = luaotfload.log and luaotfload.log.report
or function (stream, lvl, cat, ...)
if lvl > 1 then --[[not pressing]] return end
texio.write_nl ("log",
string.format ("luaotfload | %s : ",
tostring (cat)))
texio.write (string.format (...))
end
if not name then
msg ("both", 0, "load",
"Fatal error: make_loader_name (“%s”, “%s”).",
tostring (prefix), tostring (name))
return "dummy-name"
end
name = tostring (name)
if prefix == false then
msg ("log", 9, "load",
"No prefix requested, passing module name “%s” unmodified.",
name)
return tostring (name) .. ".lua"
end
prefix = tostring (prefix)
msg ("log", 9, "load",
"Composing module name from constituents %s, %s.",
prefix, name)
return prefix .. "-" .. name .. ".lua"
end
local timing_info = {
t_load = { },
t_init = { },
}
local make_loader = function (prefix)
return function (name)
local t_0 = osgettimeofday ()
local modname = make_loader_name (prefix, name)
--- We don’t want the stack info from inside, so just pcall().
local ok, data = pcall (require, modname)
local t_end = osgettimeofday ()
timing_info.t_load [name] = t_end - t_0
if not ok then
io.write "\n"
local msg = luaotfload.log and luaotfload.log.report or print
msg ("both", 0, "load", "FATAL ERROR")
msg ("both", 0, "load", " × Failed to load module %q.",
tostring (modname))
local lines = string.split (data, "\n\t")
if not lines then
msg ("both", 0, "load", " × Error message: %q", data)
else
msg ("both", 0, "load", " × Error message:")
for i = 1, #lines do
msg ("both", 0, "load", " × %q.", lines [i])
end
end
io.write "\n\n"
local debug = debug
if debug then
io.write (debug.traceback())
io.write "\n\n"
end
os.exit(-1)
end
return data
end
end
--[[doc--
Certain files are kept around that aren’t loaded because they are part of
the imported fontloader. In order to keep the initialization structure
intact we also provide a no-op version of the module loader that can be
called in the expected places.
--doc]]--
local dummy_loader = function (name)
luaotfload.log.report ("log", 3, "load",
"Skipping module “%s” on purpose.",
name)
end
local context_loader = function (name, path)
luaotfload.log.report ("log", 3, "load",
"Loading module “%s” from Context.",
name)
local t_0 = osgettimeofday ()
local modname = make_loader_name (false, name)
local modpath = modname
if path then
if lfs.isdir (path) then
luaotfload.log.report ("log", 3, "load",
"Prepending path “%s”.",
path)
modpath = file.join (path, modname)
else
luaotfload.log.report ("both", 0, "load",
"Non-existant path “%s” specified, ignoring.",
path)
end
end
local ret = require (modpath)
local t_end = osgettimeofday ()
timing_info.t_load [name] = t_end - t_0
if ret ~= true then
--- require () returns “true” upon success unless the loaded file
--- yields a non-zero exit code. This isn’t per se indicating that
--- something isn’t right, but against HH’s coding practices. We’ll
--- silently ignore this ever happening on lower log levels.
luaotfload.log.report ("log", 4, "load",
"Module “%s” returned “%s”.", ret)
end
return ret
end
local install_loaders = function ()
local loaders = { }
local loadmodule = make_loader "luaotfload"
loaders.luaotfload = loadmodule
loaders.fontloader = make_loader "fontloader"
loaders.context = context_loader
loaders.ignore = dummy_loader
----loaders.plaintex = make_loader "luatex" --=> for Luatex-Plain
loaders.initialize = function (name)
local tmp = loadmodule (name)
local logreport = luaotfload.log.report
local init = type(tmp) == "table" and tmp.init or tmp
if init and type (init) == "function" then
local t_0 = osgettimeofday ()
if not init () then
logreport ("log", 0, "load",
"Failed to load module “%s”.", name)
return
end
local t_end = osgettimeofday ()
local d_t = t_end - t_0
logreport ("log", 4, "load",
"Module “%s” loaded in %d ms.",
name, d_t)
timing_info.t_init [name] = d_t
end
end
return loaders
end
local luaotfload_initialized = false --- prevent multiple invocations
luaotfload.main = function ()
if luaotfload_initialized then
logreport ("log", 0, "load",
"Luaotfload initialization requested but is already \z
loaded, ignoring.")
return
end
luaotfload_initialized = true
luaotfload.loaders = install_loaders ()
local loaders = luaotfload.loaders
local loadmodule = loaders.luaotfload
local initialize = loaders.initialize
local starttime = osgettimeofday ()
local init = loadmodule "init" --- fontloader initialization
local store = init.early () --- injects the log module too
local logreport = luaotfload.log.report
initialize "parsers" --- fonts.conf and syntax
initialize "configuration" --- configuration options
if not init.main (store) then
logreport ("log", 0, "load", "Main fontloader initialization failed.")
end
initialize "loaders" --- Font loading; callbacks
initialize "database" --- Font management.
initialize "colors" --- Per-font colors.
local init_resolvers = loadmodule "resolvers" --- Font lookup
init_resolvers ()
if not config.actions.reconfigure () then
logreport ("log", 0, "load", "Post-configuration hooks failed.")
end
initialize "features" --- font request and feature handling
loadmodule "letterspace" --- extra character kerning
loadmodule "embolden" --- fake bold
loadmodule "notdef" --- missing glyph handling
initialize "auxiliary" --- additional high-level functionality
loadmodule "multiscript" --- ...
luaotfload.aux.start_rewrite_fontname () --- to be migrated to fontspec
logreport ("both", 0, "main",
"initialization completed in %0.3f seconds\n",
osgettimeofday() - starttime)
----inspect (timing_info)
end
-- vim:tw=79:sw=4:ts=4:et
|