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|
-----------------------------------------------------------------------
-- FILE: luaotfload-main.lua
-- DESCRIPTION: Luaotfload entry point
-- REQUIREMENTS: luatex v.0.95 or later; packages lualibs
-- AUTHOR: Élie Roux, Khaled Hosny, Philipp Gesang
-----------------------------------------------------------------------
--
local osgettimeofday = os.gettimeofday
config = config or { }
luaotfload = luaotfload or { }
local luaotfload = luaotfload
luaotfload.log = luaotfload.log or { }
luaotfload.version = "2.7"
luaotfload.loaders = { }
luaotfload.min_luatex_version = 95 --- i. e. 0.95
luaotfload.fontloader_package = "reference" --- default: from current Context
local authors = "\z
Hans Hagen,\z
Khaled Hosny,\z
Elie Roux,\z
Will Robertson,\z
Philipp Gesang,\z
Dohyun Kim,\z
Reuben Thomas\z
"
luaotfload.module = {
name = "luaotfload-main",
version = 2.70002,
date = "2016/04/21",
description = "OpenType layout system.",
author = authors,
copyright = authors,
license = "GPL v2.0"
}
--[[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
luatexbase.provides_module (luaotfload.module)
--[[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)
local data = require (modname)
local t_end = osgettimeofday ()
timing_info.t_load [name] = t_end - t_0
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
if type (tmp) == "table" then
local init = tmp.init
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
end
return loaders
end
luaotfload.main = function ()
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.
luaotfload.resolvers = loadmodule "resolvers" --- Font lookup
luaotfload.resolvers.init ()
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
initialize "auxiliary" --- additional high-level functionality
luaotfload.aux.start_rewrite_fontname () --- to be migrated to fontspec
logreport ("both", 0, "main",
"initialization completed in %0.3f seconds",
osgettimeofday() - starttime)
----inspect (timing_info)
end
-- vim:tw=79:sw=4:ts=4:et
|
