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|
module("luaotfload", package.seeall)
luaotfload.module = {
name = "luaotfload-legacy",
version = 1.31,
date = "2013/04/25",
description = "Unsupported Luaotfload",
author = "Elie Roux & Hans Hagen",
copyright = "Elie Roux",
license = "GPL v2"
}
local error, warning, info, log = luatexbase.provides_module(luaotfload.module)
--[[doc--
This used to be a necessary initalization in order not to rebuild an
existing font. Maybe 600 should be replaced by |\pdfpkresolution|
or |texconfig.pk_dpi| (and it should be replaced dynamically), but
we don't have access (yet) to the |texconfig| table, so we let it be
600. Anyway, it does still work fine even if |\pdfpkresolution| is
changed.
--doc]]--
kpse.init_prog("", 600, "/")
--[[doc--
The minimal required \luatex version.
We are tolerant folks.
--doc]]--
local luatex_version = 60
if tex.luatexversion < luatex_version then
warning("LuaTeX v%.2f is old, v%.2f is required, v0.76 recommended.",
tex.luatexversion/100,
luatex_version /100)
end
--[[doc--
\subsection{Module loading}
We load the outdated \context files with this function. It
automatically adds the |otfl-| prefix to it, so that we call it with
the actual \context name.
--doc]]--
function luaotfload.loadmodule(tofind)
local found = kpse.find_file(tofind,"tex")
if found then
log("loading file %s.", found)
dofile(found)
else
error("file %s not found.", tofind)
end
end
local loadmodule = luaotfload.loadmodule
--[[doc--
Keep away from these lines!
--doc]]--
loadmodule"luaotfload-legacy-merged.lua"
if not fonts then
loadmodule("otfl-luat-dum.lua") -- not used in context at all
loadmodule("otfl-luat-ovr.lua") -- override some luat-dum functions
loadmodule("otfl-data-con.lua") -- maybe some day we don't need this one
loadmodule("otfl-font-ini.lua")
loadmodule("otfl-node-dum.lua")
loadmodule("otfl-node-inj.lua")
--[[doc--
By default \context takes some private attributes for internal use. To
avoide attribute clashes with other packages, we override the function
that allocates new attributes, making it a wraper around
|luatexbase.new_attribute()|. We also prefix attributes with |otfl@| to
avoid possiple name clashes.
--doc]]--
loadmodule("luaotfload-legacy-attributes.lua") -- patch attributes
--[[doc--
Font handling modules.
--doc]]--
loadmodule("otfl-font-tfm.lua")
loadmodule("otfl-font-cid.lua")
loadmodule("otfl-font-ott.lua")
loadmodule("otfl-font-map.lua")
loadmodule("otfl-font-otf.lua")
loadmodule("otfl-font-otd.lua")
loadmodule("otfl-font-oti.lua")
loadmodule("otfl-font-otb.lua")
loadmodule("otfl-font-otn.lua")
loadmodule("otfl-font-ota.lua")
loadmodule("otfl-font-otc.lua")
loadmodule("otfl-font-def.lua")
--[[doc--
\textsf{old luaotfload} specific modules.
--doc]]--
loadmodule("otfl-font-xtx.lua")
loadmodule("otfl-font-dum.lua")
loadmodule("otfl-font-clr.lua")
end
loadmodule"luaotfload-legacy-database.lua" --- unmerged coz needed in db script
--[[doc--
This is a patch for |otfl-font-def.lua|, that defines a reader for ofm
fonts, this is necessary if we set the forced field of the specification
to |ofm|.
--doc]]--
if fonts and fonts.tfm and fonts.tfm.readers then
fonts.tfm.readers.ofm = fonts.tfm.readers.tfm
end
--[[doc--
\subsection{Post-processing TFM table}
Here we do some final touches to the loaded TFM table before passing it
to the \tex end.
First we create a callback for patching fonts on the fly, to be used by
other packages.
--doc]]--
luatexbase.create_callback("luaotfload.patch_font", "simple", function() end)
--[[doc--
then define a function where font manipulation will take place.
--doc]]--
local function def_font(...)
local fontdata = fonts.define.read(...)
if type(fontdata) == "table" and fontdata.shared then
--[[doc--
Then we populate |MathConstants| table, which is required for
OpenType math.
Note: actually it isn’t, but you’re asking for it by using outdated
code.
--doc]]--
local otfdata = fontdata.shared.otfdata
if otfdata.metadata.math then
local mc = { }
for k,v in next, otfdata.metadata.math do
if k:find("Percent") then
-- keep percent values as is
mc[k] = v
else
mc[k] = v / fontdata.units * fontdata.size
end
end
-- for \overwithdelims
mc.FractionDelimiterSize = 1.01 * fontdata.size
mc.FractionDelimiterDisplayStyleSize = 2.39 * fontdata.size
fontdata.MathConstants = mc
end
--[[doc--
Execute any registered font patching callbacks.
--doc]]--
luatexbase.call_callback("luaotfload.patch_font", fontdata)
end
return fontdata
end
--[[doc--
\subsection{\context override}
We have a unified function for both file and name resolver. This
line is commented as it makes database reload too often. This means
that in some cases, a font in the database will not be found if
it's not in the texmf tree. A similar thing will reappear in next
version.
--doc]]--
--fonts.define.resolvers.file = fonts.define.resolvers.name
--[[doc--
Overriding some defaults set in \context code.
--doc]]--
fonts.mode = "node"
--[[doc--
The following features are useful in math (e.g. in XITS Math font),
but \textsf{luaotfload} does not recognize them in |base| mode.
--doc]]--
local register_base_sub = fonts.otf.features.register_base_substitution
local gsubs = {
"ss01", "ss02", "ss03", "ss04", "ss05",
"ss06", "ss07", "ss08", "ss09", "ss10",
"ss11", "ss12", "ss13", "ss14", "ss15",
"ss16", "ss17", "ss18", "ss19", "ss20",
}
for _,v in next, gsubs do
register_base_sub(v)
end
--[[doc--
Finally we register the callbacks
--doc]]--
luatexbase.add_to_callback("pre_linebreak_filter",
nodes.simple_font_handler,
"luaotfload.pre_linebreak_filter")
luatexbase.add_to_callback("hpack_filter",
nodes.simple_font_handler,
"luaotfload.hpack_filter")
luatexbase.reset_callback("define_font")
luatexbase.add_to_callback("define_font",
def_font,
"luaotfload.define_font", 1)
luatexbase.add_to_callback("find_vf_file",
fonts.vf.find,
"luaotfload.find_vf_file")
--[[doc--
XXX: see https://github.com/wspr/unicode-math/issues/185
\luatex does not provide interface to accessing
|(Script)ScriptPercentScaleDown| math constants, so we
emulate \xetex behaviour by setting |\fontdimen10| and
|\fontdimen11|.
Note: actually, it does now, but not unless you update.
--doc]]--
local function set_sscale_diments(fontdata)
local mc = fontdata.MathConstants
if mc then
if mc["ScriptPercentScaleDown"] then
fontdata.parameters[10] = mc.ScriptPercentScaleDown
else -- resort to plain TeX default
fontdata.parameters[10] = 70
end
if mc["ScriptScriptPercentScaleDown"] then
fontdata.parameters[11] = mc.ScriptScriptPercentScaleDown
else -- resort to plain TeX default
fontdata.parameters[11] = 50
end
end
end
luatexbase.add_to_callback("luaotfload.patch_font", set_sscale_diments, "unicodemath.set_sscale_diments")
--[[doc--
Version 2.3c of fontspec dropped a couple features that are now
provided in the luaotfload auxiliary libraries. To avoid breaking
Mik\TEX (again), which is sorta the entire point of distributing the
legacy codebase, we temporarily restore those functions here.
Note that apart from cosmetic changes these are still the same as in
pre-TL2013 fontspec, relying on pairs() and other inefficient methods.
--doc]]--
luaotfload.aux = luaotfload.aux or { }
local aux = luaotfload.aux
local stringlower = string.lower
local fontid = font.id
local identifiers = fonts.identifiers
local check_script = function (id, script)
local s = stringlower(script)
if id and id > 0 then
local tfmdata = identifiers[id]
local otfdata = tfmdata.shared and tfmdata.shared.otfdata
if otfdata then
local features = otfdata.luatex.features
for i, _ in pairs(features) do
for j, _ in pairs(features[i]) do
if features[i][j][s] then
fontspec.log("script '%s' exists in font '%s'",
script, tfmdata.fullname)
return true
end
end
end
end
end
end
local check_language = function (id, script, language)
local s = stringlower(script)
local l = stringlower(language)
if id and id > 0 then
local tfmdata = identifiers[id]
local otfdata = tfmdata.shared and tfmdata.shared.otfdata
if otfdata then
local features = otfdata.luatex.features
for i, _ in pairs(features) do
for j, _ in pairs(features[i]) do
if features[i][j][s] and features[i][j][s][l] then
fontspec.log("language '%s' for script '%s' exists in font '%s'",
language, script, tfmdata.fullname)
return true
end
end
end
end
end
end
local check_feature = function (id, script, language, feature)
local s = stringlower(script)
local l = stringlower(language)
local f = stringlower(feature:gsub("^[+-]", ""):gsub("=.*$", ""))
if id and id > 0 then
local tfmdata = identifiers[id]
local otfdata = tfmdata.shared and tfmdata.shared.otfdata
if otfdata then
local features = otfdata.luatex.features
for i, _ in pairs(features) do
if features[i][f] and features[i][f][s] then
if features[i][f][s][l] == true then
fontspec.log("feature '%s' for language '%s' and script '%s' exists in font '%s'",
feature, language, script, tfmdata.fullname)
return true
end
end
end
end
end
end
local get_math_dimension = function(fnt, str)
if type(fnt) == "string" then
fnt = fontid(fnt)
end
local tfmdata = identifiers[fnt]
if tfmdata then
local mathdata = tfmdata.MathConstants
if mathdata then
return mathdata[str]
end
end
end
aux.provides_script = check_script
aux.provides_language = check_language
aux.provides_feature = check_feature
aux.get_math_dimension = get_math_dimension
local set_capheight = function (tfmdata)
local capheight
local shared = tfmdata.shared
if shared then
local metadata = shared.otfdata.metadata
local units_per_em = metadata.units_per_em or tfmdata.units
local os2_capheight = shared.otfdata.pfminfo.os2_capheight
local size = tfmdata.size
if os2_capheight > 0 then
capheight = os2_capheight / units_per_em * size
else
local X8 = string.byte"X"
if tfmdata.characters[X8] then
capheight = tfmdata.characters[X8].height
else
capheight = metadata.ascent / units_per_em * size
end
end
else
local X8 = string.byte"X"
if tfmdata.characters[X8] then
capheight = tfmdata.characters[X8].height
end
end
if capheight then
tfmdata.parameters[8] = capheight
end
end
luatexbase.add_to_callback("luaotfload.patch_font",
set_capheight,
"luaotfload.set_capheight")
--[[doc--
End of auxiliary functionality that was moved from fontspec.lua.
--doc]]--
-- vim:ts=2:sw=2:expandtab:ft=lua
|