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|
-----------------------------------------------------------------------
-- FILE: luaotfload-main.lua
-- DESCRIPTION: Luaotfload entry point
-- REQUIREMENTS: luatex v.0.80 or later; packages lualibs, luatexbase
-- AUTHOR: Élie Roux, Khaled Hosny, Philipp Gesang
-- VERSION: same as Luaotfload
-- MODIFIED: 2015-06-09 23:08:18+0200
-----------------------------------------------------------------------
--
--- Note:
--- This file was part of the original luaotfload.dtx and has been
--- converted to a pure Lua file during the transition from Luaotfload
--- version 2.4 to 2.5. Thus, the comments are still in TeX (Latex)
--- markup.
local os = os
local osgettimeofday = os.gettimeofday
local initial_log_level = 0
luaotfload = luaotfload or { }
config = config or { }
local luaotfload = luaotfload
luaotfload.log = luaotfload.log or { }
luaotfload.version = "2.6"
luaotfload.loaders = { }
luaotfload.min_luatex_version = 79 --- i. e. 0.79
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 = 2.60001,
date = "2015/05/26",
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
local error, warning, info, log =
luatexbase.provides_module(luaotfload.module)
luaotfload.log.tex = {
error = error,
warning = warning,
info = info,
log = log,
}
--[[doc--
We set the minimum version requirement for \LUATEX to v0.76,
because the font loader requires recent features like direct
attribute indexing and \luafunction{node.end_of_math()} that aren’t
available in earlier versions.\footnote{%
See Taco’s announcement of v0.76:
\url{http://comments.gmane.org/gmane.comp.tex.luatex.user/4042}
and this commit by Hans that introduced those features.
\url{http://repo.or.cz/w/context.git/commitdiff/a51f6cf6ee087046a2ae5927ed4edff0a1acec1b}.
}
--doc]]--
if tex.luatexversion < luaotfload.min_luatex_version then
warning ("LuaTeX v%.2f is old, v%.2f or later is recommended.",
tex.luatexversion / 100,
luaotfload.min_luatex_version / 100)
warning ("using fallback fontloader -- newer functionality not available")
luaotfload.fontloader_package = "tl2014" --- TODO fallback should be configurable too
--- we install a fallback for older versions as a safety
end
--[[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 print
if prefix then
msg ("log", 7, "load",
"Composing fontloader name from constitutents %s, %s",
prefix, name)
return prefix .. "-" .. name .. ".lua"
end
msg ("log", 7, "load",
"Loading fontloader file %s literally.",
name)
return name
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
local install_loaders = function ()
local loaders = { }
local loadmodule = make_loader "luaotfload"
loaders.luaotfload = loadmodule
loaders.fontloader = make_loader "fontloader"
----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.",
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.install ()
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 "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
|
