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authorElie Roux <elie.roux@telecom-bretagne.eu>2009-04-08 13:18:29 +0200
committerElie Roux <elie.roux@telecom-bretagne.eu>2009-04-08 13:18:29 +0200
commitc3ccb3ee07e0a67171c24960966ae974e0dd8e98 (patch)
treec5e7ea101bca45dcadb4adda212b36e8b3203066
downloadluaotfload-c3ccb3ee07e0a67171c24960966ae974e0dd8e98.tar.gz
adding a first working version of luaotfload
Diffstat
-rw-r--r--luaotfload.lua144
-rw-r--r--luaotfload.sty42
-rw-r--r--otfl-font-cid.lua143
-rw-r--r--otfl-font-def.lua569
-rw-r--r--otfl-font-dum.lua85
-rw-r--r--otfl-font-ini.lua92
-rw-r--r--otfl-font-ota.lua305
-rw-r--r--otfl-font-otb.lua344
-rw-r--r--otfl-font-otc.lua127
-rw-r--r--otfl-font-otf.lua1577
-rw-r--r--otfl-font-otn.lua2453
-rw-r--r--otfl-font-tfm.lua780
-rw-r--r--otfl-font-xtx.lua109
-rw-r--r--otfl-luat-con.lua118
-rw-r--r--otfl-luat-dum.lua58
-rw-r--r--otfl-node-dum.lua24
-rw-r--r--otfl-node-fnt.lua194
-rw-r--r--otfl-node-ini.lua214
-rw-r--r--otfl-node-inj.lua606
19 files changed, 7984 insertions, 0 deletions
diff --git a/luaotfload.lua b/luaotfload.lua
new file mode 100644
index 0000000..360bb83
--- /dev/null
+++ b/luaotfload.lua
@@ -0,0 +1,144 @@
+luaotfload = { }
+
+luaotfload.module = {
+ name = "luaotfload",
+ version = 1.001,
+ date = "2009/04/08",
+ description = "ConTeXt font loading system.",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+luatextra.provides_module(luaotfload.module)
+
+function luaotfload.loadmodule(name)
+ local foundname = kpse.find_file('otfl-'..name,"tex") or ""
+ if not foundname then return end
+ dofile(foundname)
+end
+
+-- The following functions are made to map ConTeXt functions to luaextra functions.
+
+string.strip = string.stripspaces
+
+local splitters_s, splitters_m = { }, { }
+
+function lpeg.splitat(separator,single)
+ local splitter = (single and splitters_s[separator]) or splitters_m[separator]
+ if not splitter then
+ separator = lpeg.P(separator)
+ if single then
+ local other, any = lpeg.C((1 - separator)^0), lpeg.P(1)
+ splitter = other * (separator * lpeg.C(any^0) + "")
+ splitters_s[separator] = splitter
+ else
+ local other = lpeg.C((1 - separator)^0)
+ splitter = other * (separator * other)^0
+ splitters_m[separator] = splitter
+ end
+ end
+ return splitter
+end
+
+file = fpath
+file.extname = fpath.suffix
+
+function table.compact(t)
+ if t then
+ for k,v in next, t do
+ if not next(v) then
+ t[k] = nil
+ end
+ end
+ end
+end
+
+function table.sortedhashkeys(tab) -- fast one
+ local srt = { }
+ for key,_ in next, tab do
+ srt[#srt+1] = key
+ end
+ table.sort(srt)
+ return srt
+end
+
+-- The following modules contain code that is either not used
+-- at all outside ConTeXt or will fail when enabled due to
+-- lack of other modules.
+
+-- First we load a few helper modules. This is about the miminum
+-- needed to let the font modules do theuir work.
+
+luaotfload.loadmodule('luat-dum.lua') -- not used in context at all
+luaotfload.loadmodule('luat-con.lua') -- maybe some day we don't need this one
+
+-- We do need some basic node support although the following
+-- modules contain a little bit of code that is not used. It's
+-- not worth weeding.
+
+luaotfload.loadmodule('node-ini.lua')
+
+-- function to set the good attribute numbers, they are not arbitrary values
+-- between 127 and 255 like in the ConTeXt base code
+
+function attributes.private(name)
+ local number = tex.attributenumber['otfl@'..name]
+ if not number then
+ luatextra.module_error('luaotfload', string.format('asking for attribute %s, but not declared. Please report to the maintainer of luaotfload.', name))
+ end
+ return number
+end
+
+luaotfload.loadmodule('node-inj.lua') -- will be replaced (luatex > .50)
+luaotfload.loadmodule('node-fnt.lua')
+luaotfload.loadmodule('node-dum.lua')
+
+-- Now come the font modules that deal with traditional TeX fonts
+-- as well as open type fonts. We don't load the afm related code
+-- from font-enc.lua and font-afm.lua as only ConTeXt deals with
+-- it.
+--
+-- The font database file (if used at all) must be put someplace
+-- visible for kpse and is not shared with ConTeXt. The mtx-fonts
+-- script can be used to genate this file (using the --names
+-- option).
+
+luaotfload.loadmodule('font-ini.lua')
+luaotfload.loadmodule('font-tfm.lua') -- will be split (we may need font-log)
+--loadmodule('font-ott.lua') -- might be split
+luaotfload.loadmodule('font-otf.lua')
+luaotfload.loadmodule('font-otb.lua')
+luaotfload.loadmodule('font-cid.lua')
+luaotfload.loadmodule('font-otn.lua')
+luaotfload.loadmodule('font-ota.lua') -- might be split
+luaotfload.loadmodule('font-otc.lua')
+do
+ local temp = callback.register
+ callback.register = function (...)
+ return
+ end
+ luaotfload.loadmodule('font-def.lua')
+ callback.register = temp
+end
+luaotfload.loadmodule('font-xtx.lua')
+luaotfload.loadmodule('font-dum.lua')
+
+function luaotfload.register_callbacks()
+ callback.add('ligaturing', nodes.simple_font_dummy, 'nodes.simple_font_dummy')
+ callback.add('kerning', nodes.simple_font_dummy, 'nodes.simple_font_dummy')
+ callback.add('pre_linebreak_filter', nodes.simple_font_handler, 'nodes.simple_font_handler')
+ callback.add('hpack_filter', nodes.simple_font_handler, 'nodes.simple_font_handler')
+ callback.reset('define_font')
+ callback.add('define_font' , fonts.define.read, 'fonts.define.read', 1)
+ callback.add('find_vf_file', fonts.vf.find, 'fonts.vf.find')
+end
+
+function luaotfload.unregister_callbacks()
+ callback.remove('ligaturing', 'nodes.simple_font_dummy')
+ callback.remove('kerning', 'nodes.simple_font_dummy')
+ callback.remove('pre_linebreak_filter', 'nodes.simple_font_handler')
+ callback.remove('hpack_filter', 'nodes.simple_font_handler')
+ callback.reset('define_font')
+ callback.remove('find_vf_file', 'fonts.vf.find')
+end
diff --git a/luaotfload.sty b/luaotfload.sty
new file mode 100644
index 0000000..c01e966
--- /dev/null
+++ b/luaotfload.sty
@@ -0,0 +1,42 @@
+\expandafter\ifx\csname ProvidesPackage\endcsname\relax
+\expandafter\ifx\csname luaUseModule\endcsname\relax
+\input luatextra.sty
+\fi
+\else
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{luaotfload}%
+ [2009/04/08 v1.001 ConTeXt font loading system]
+\RequirePackage{luatextra}
+\fi
+
+\expandafter\edef\csname otfl@AtEnd\endcsname{%
+ \catcode64 \the\catcode64\relax
+}
+
+\catcode64 11
+
+\newluaattribute\otfl@state
+\newluaattribute\otfl@markbase
+\newluaattribute\otfl@markdone
+\newluaattribute\otfl@markmark
+\newluaattribute\otfl@cursbase
+\newluaattribute\otfl@curscurs
+\newluaattribute\otfl@cursdone
+\newluaattribute\otfl@kernpair
+\newluaattribute\otfl@color
+
+\def\otfl@off{
+\luadirect{luaotfload.unregister_callbacks()}
+}
+
+\def\otfl@on{
+\luadirect{luaotfload.register_callbacks()}
+}
+
+\luaUseModule{luaotfload}
+
+\otfl@on
+
+\otfl@AtEnd
+
+\endinput
diff --git a/otfl-font-cid.lua b/otfl-font-cid.lua
new file mode 100644
index 0000000..88de5fd
--- /dev/null
+++ b/otfl-font-cid.lua
@@ -0,0 +1,143 @@
+if not modules then modules = { } end modules ['font-cid'] = {
+ version = 1.001,
+ comment = "companion to font-otf.lua (cidmaps)",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local format, match = string.format, string.match
+local tonumber = tonumber
+
+local trace_loading = false trackers.register("otf.loading", function(v) trace_loading = v end)
+
+fonts = fonts or { }
+fonts.cid = fonts.cid or { }
+fonts.cid.map = fonts.cid.map or { }
+fonts.cid.max = fonts.cid.max or 10
+
+
+-- original string parser: 0.109, lpeg parser: 0.036 seconds for Adobe-CNS1-4.cidmap
+--
+-- 18964 18964 (leader)
+-- 0 /.notdef
+-- 1..95 0020
+-- 99 3000
+
+local number = lpeg.C(lpeg.R("09","af","AF")^1)
+local space = lpeg.S(" \n\r\t")
+local spaces = space^0
+local period = lpeg.P(".")
+local periods = period * period
+local name = lpeg.P("/") * lpeg.C((1-space)^1)
+
+local unicodes, names = { }, { }
+
+local function do_one(a,b)
+ unicodes[tonumber(a)] = tonumber(b,16)
+end
+
+local function do_range(a,b,c)
+ c = tonumber(c,16)
+ for i=tonumber(a),tonumber(b) do
+ unicodes[i] = c
+ c = c + 1
+ end
+end
+
+local function do_name(a,b)
+ names[tonumber(a)] = b
+end
+
+local grammar = lpeg.P { "start",
+ start = number * spaces * number * lpeg.V("series"),
+ series = (spaces * (lpeg.V("one") + lpeg.V("range") + lpeg.V("named")) )^1,
+ one = (number * spaces * number) / do_one,
+ range = (number * periods * number * spaces * number) / do_range,
+ named = (number * spaces * name) / do_name
+}
+
+function fonts.cid.load(filename)
+ local data = io.loaddata(filename)
+ if data then
+ unicodes, names = { }, { }
+ grammar:match(data)
+ local supplement, registry, ordering = match(filename,"^(.-)%-(.-)%-()%.(.-)$")
+ return {
+ supplement = supplement,
+ registry = registry,
+ ordering = ordering,
+ filename = filename,
+ unicodes = unicodes,
+ names = names
+ }
+ else
+ return nil
+ end
+end
+
+local template = "%s-%s-%s.cidmap"
+
+local function locate(registry,ordering,supplement)
+ local filename = format(template,registry,ordering,supplement)
+ local cidmap = fonts.cid.map[filename]
+ if not cidmap then
+ if trace_loading then
+ logs.report("load otf","checking cidmap, registry: %s, ordering: %s, supplement: %s, filename: %s",registry,ordering,supplement,filename)
+ end
+ local fullname = input.find_file(filename,'cid') or ""
+ if fullname ~= "" then
+ cidmap = fonts.cid.load(fullname)
+ if cidmap then
+ if trace_loading then
+ logs.report("load otf","using cidmap file %s",filename)
+ end
+ fonts.cid.map[filename] = cidmap
+ return cidmap
+ end
+ end
+ end
+ return cidmap
+end
+
+function fonts.cid.getmap(registry,ordering,supplement)
+ -- cf Arthur R. we can safely scan upwards since cids are downward compatible
+ local supplement = tonumber(supplement)
+ if trace_loading then
+ logs.report("load otf","needed cidmap, registry: %s, ordering: %s, supplement: %s",registry,ordering,supplement)
+ end
+ local cidmap = locate(registry,ordering,supplement)
+ if not cidmap then
+ local cidnum = nil
+ -- next highest (alternatively we could start high)
+ if supplement < fonts.cid.max then
+ for supplement=supplement+1,fonts.cid.max do
+ local c = locate(registry,ordering,supplement)
+ if c then
+ cidmap, cidnum = c, supplement
+ break
+ end
+ end
+ end
+ -- next lowest (least worse fit)
+ if not cidmap and supplement > 0 then
+ for supplement=supplement-1,0,-1 do
+ local c = locate(registry,ordering,supplement)
+ if c then
+ cidmap, cidnum = c, supplement
+ break
+ end
+ end
+ end
+ -- prevent further lookups
+ if cidmap and cidnum > 0 then
+ for s=0,cidnum-1 do
+ filename = format(template,registry,ordering,s)
+ if not fonts.cid.map[filename] then
+ fonts.cid.map[filename] = cidmap -- copy of ref
+ end
+ end
+ end
+ end
+ return cidmap
+end
diff --git a/otfl-font-def.lua b/otfl-font-def.lua
new file mode 100644
index 0000000..a437ef8
--- /dev/null
+++ b/otfl-font-def.lua
@@ -0,0 +1,569 @@
+if not modules then modules = { } end modules ['font-def'] = {
+ version = 1.001,
+ comment = "companion to font-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local format, concat, gmatch, match, find, lower = string.format, table.concat, string.gmatch, string.match, string.find, string.lower
+local tostring, next = tostring, next
+
+local trace_defining = false trackers.register("fonts.defining", function(v) trace_defining = v end)
+
+trackers.register("fonts.loading", "fonts.defining", "otf.loading", "afm.loading", "tfm.loading")
+trackers.register("fonts.all", "fonts.*", "otf.*", "afm.*", "tfm.*")
+
+--[[ldx--
+<p>Here we deal with defining fonts. We do so by intercepting the
+default loader that only handles <l n='tfm'/>.</p>
+--ldx]]--
+
+fonts = fonts or { }
+fonts.define = fonts.define or { }
+fonts.tfm = fonts.tfm or { }
+fonts.ids = fonts.ids or { }
+fonts.vf = fonts.vf or { }
+fonts.used = fonts.used or { }
+
+local tfm = fonts.tfm
+local vf = fonts.vf
+local define = fonts.define
+
+tfm.version = 1.01
+tfm.cache = containers.define("fonts", "tfm", tfm.version, false) -- better in font-tfm
+
+define.method = "afm or tfm" -- afm, tfm, afm or tfm, tfm or afm
+define.specify = fonts.define.specify or { }
+define.methods = fonts.define.methods or { }
+
+tfm.fonts = tfm.fonts or { }
+tfm.readers = tfm.readers or { }
+tfm.internalized = tfm.internalized or { } -- internal tex numbers
+
+tfm.readers.sequence = { 'otf', 'ttf', 'afm', 'tfm' }
+
+local readers = tfm.readers
+local sequence = readers.sequence
+
+--[[ldx--
+<p>We hardly gain anything when we cache the final (pre scaled)
+<l n='tfm'/> table. But it can be handy for debugging.</p>
+--ldx]]--
+
+fonts.version = 1.05
+fonts.cache = containers.define("fonts", "def", fonts.version, false)
+
+--[[ldx--
+<p>We can prefix a font specification by <type>name:</type> or
+<type>file:</type>. The first case will result in a lookup in the
+synonym table.</p>
+
+<typing>
+[ name: | file: ] identifier [ separator [ specification ] ]
+</typing>
+
+<p>The following function split the font specification into components
+and prepares a table that will move along as we proceed.</p>
+--ldx]]--
+
+-- beware, we discard additional specs
+--
+-- method:name method:name(sub) method:name(sub)*spec method:name*spec
+-- name name(sub) name(sub)*spec name*spec
+-- name@spec*oeps
+
+local splitter, specifiers = nil, ""
+
+function define.add_specifier(symbol)
+ specifiers = specifiers .. symbol
+ local left = lpeg.P("(")
+ local right = lpeg.P(")")
+ local colon = lpeg.P(":")
+ local method = lpeg.S(specifiers)
+ local lookup = lpeg.C(lpeg.P("file")+lpeg.P("name")) * colon -- hard test, else problems with : method
+ local sub = left * lpeg.C(lpeg.P(1-left-right-method)^1) * right
+ local specification = lpeg.C(method) * lpeg.C(lpeg.P(1-method)^1)
+ local name = lpeg.C((1-sub-specification)^1)
+ splitter = lpeg.P((lookup + lpeg.Cc("")) * name * (sub + lpeg.Cc("")) * (specification + lpeg.Cc("")))
+end
+
+function define.get_specification(str)
+ return splitter:match(str)
+end
+
+function define.register_split(symbol,action)
+ define.add_specifier(symbol)
+ define.specify[symbol] = action
+end
+
+function define.makespecification(specification, lookup, name, sub, method, detail, size)
+ size = size or 655360
+ if trace_defining then
+ logs.report("define font","%s -> lookup: %s, name: %s, sub: %s, method: %s, detail: %s",
+ specification, (lookup ~= "" and lookup) or "[file]", (name ~= "" and name) or "-",
+ (sub ~= "" and sub) or "-", (method ~= "" and method) or "-", (detail ~= "" and detail) or "-")
+ end
+--~ if specification.lookup then
+--~ lookup = specification.lookup -- can come from xetex [] syntax
+--~ specification.lookup = nil
+--~ end
+ if lookup ~= 'name' then -- for the moment only two lookups, maybe some day also system:
+ lookup = 'file'
+ end
+ local t = {
+ lookup = lookup, -- forced type
+ specification = specification, -- full specification
+ size = size, -- size in scaled points or -1000*n
+ name = name, -- font or filename
+ sub = sub, -- subfont (eg in ttc)
+ method = method, -- specification method
+ detail = detail, -- specification
+ resolved = "", -- resolved font name
+ forced = "", -- forced loader
+ features = { }, -- preprocessed features
+ }
+ return t
+end
+
+function define.analyze(specification, size)
+ -- can be optimized with locals
+ local lookup, name, sub, method, detail = define.get_specification(specification or "")
+ return define.makespecification(specification,lookup, name, sub, method, detail, size)
+end
+
+--[[ldx--
+<p>A unique hash value is generated by:</p>
+--ldx]]--
+
+local sortedhashkeys = table.sortedhashkeys
+
+function tfm.hash_features(specification)
+ local features = specification.features
+ if features then
+ local t = { }
+ local normal = features.normal
+ if normal and next(normal) then
+ local f = sortedhashkeys(normal)
+ for i=1,#f do
+ local v = f[i]
+ if v ~= "number" then
+ t[#t+1] = v .. '=' .. tostring(normal[v])
+ end
+ end
+ end
+ local vtf = features.vtf
+ if vtf and next(vtf) then
+ local f = sortedhashkeys(vtf)
+ for i=1,#f do
+ local v = f[i]
+ t[#t+1] = v .. '=' .. tostring(vtf[v])
+ end
+ end
+ if #t > 0 then
+ return concat(t,"+")
+ end
+ end
+ return "unknown"
+end
+
+fonts.designsizes = { }
+
+--[[ldx--
+<p>In principle we can share tfm tables when we are in node for a font, but then
+we need to define a font switch as an id/attr switch which is no fun, so in that
+case users can best use dynamic features ... so, we will not use that speedup. Okay,
+when we get rid of base mode we can optimize even further by sharing, but then we
+loose our testcases for <l n='luatex'/>.</p>
+--ldx]]--
+
+function tfm.hash_instance(specification,force)
+ local hash, size, fallbacks = specification.hash, specification.size, specification.fallbacks
+ if force or not hash then
+ hash = tfm.hash_features(specification)
+ specification.hash = hash
+ end
+ if size < 1000 and fonts.designsizes[hash] then
+ size = math.round(tfm.scaled(size, fonts.designsizes[hash]))
+ specification.size = size
+ end
+--~ local mathsize = specification.mathsize or 0
+--~ if mathsize > 0 then
+--~ local textsize = specification.textsize
+--~ if fallbacks then
+--~ return hash .. ' @ ' .. tostring(size) .. ' [ ' .. tostring(mathsize) .. ' : ' .. tostring(textsize) .. ' ] @ ' .. fallbacks
+--~ else
+--~ return hash .. ' @ ' .. tostring(size) .. ' [ ' .. tostring(mathsize) .. ' : ' .. tostring(textsize) .. ' ]'
+--~ end
+--~ else
+ if fallbacks then
+ return hash .. ' @ ' .. tostring(size) .. ' @ ' .. fallbacks
+ else
+ return hash .. ' @ ' .. tostring(size)
+ end
+--~ end
+end
+
+--[[ldx--
+<p>We can resolve the filename using the next function:</p>
+--ldx]]--
+
+function define.resolve(specification)
+ if not specification.resolved or specification.resolved == "" then -- resolved itself not per se in mapping hash
+ if specification.lookup == 'name' then
+ specification.resolved, specification.sub = fonts.names.resolve(specification.name,specification.sub)
+ if specification.resolved then
+ specification.forced = file.extname(specification.resolved)
+ specification.name = file.removesuffix(specification.resolved)
+ end
+ elseif specification.lookup == 'file' then
+ specification.forced = file.extname(specification.name)
+ specification.name = file.removesuffix(specification.name)
+ end
+ end
+ if specification.forced == "" then
+ specification.forced = nil
+ else
+ specification.forced = specification.forced
+ end
+--~ specification.hash = specification.name .. ' @ ' .. tfm.hash_features(specification)
+ specification.hash = lower(specification.name .. ' @ ' .. tfm.hash_features(specification))
+ if specification.sub and specification.sub ~= "" then
+ specification.hash = specification.sub .. ' @ ' .. specification.hash
+ end
+ return specification
+end
+
+--[[ldx--
+<p>The main read function either uses a forced reader (as determined by
+a lookup) or tries to resolve the name using the list of readers.</p>
+
+<p>We need to cache when possible. We do cache raw tfm data (from <l
+n='tfm'/>, <l n='afm'/> or <l n='otf'/>). After that we can cache based
+on specificstion (name) and size, that is, <l n='tex'/> only needs a number
+for an already loaded fonts. However, it may make sense to cache fonts
+before they're scaled as well (store <l n='tfm'/>'s with applied methods
+and features). However, there may be a relation between the size and
+features (esp in virtual fonts) so let's not do that now.</p>
+
+<p>Watch out, here we do load a font, but we don't prepare the
+specification yet.</p>
+--ldx]]--
+
+function tfm.read(specification)
+ local hash = tfm.hash_instance(specification)
+ local tfmtable = tfm.fonts[hash] -- hashes by size !
+ if not tfmtable then
+ local forced = specification.forced or ""
+ if forced ~= "" then
+ tfmtable = readers[lower(forced)](specification)
+ if not tfmtable then
+ logs.report("define font","forced type %s of %s not found",forced,specification.name)
+ end
+ else
+ for s=1,#sequence do -- reader sequence
+ local reader = sequence[s]
+ if readers[reader] then -- not really needed
+ if trace_defining then
+ logs.report("define font","trying type %s for %s with file %s",reader,specification.name,specification.filename or "unknown")
+ end
+ tfmtable = readers[reader](specification)
+ if tfmtable then break end
+ end
+ end
+ end
+ if tfmtable then
+ if tfmtable.filename and fonts.dontembed[tfmtable.filename] then
+ tfmtable.embedding = "no"
+ else
+ tfmtable.embedding = "subset"
+ end
+ tfm.fonts[hash] = tfmtable
+ fonts.designsizes[specification.hash] = tfmtable.designsize -- we only know this for sure after loading once
+ --~ tfmtable.mode = specification.features.normal.mode or "base"
+ end
+ end
+ if not tfmtable then
+ logs.report("define font","font with name %s is not found",specification.name)
+ end
+ return tfmtable
+end
+
+--[[ldx--
+<p>For virtual fonts we need a slightly different approach:</p>
+--ldx]]--
+
+function tfm.read_and_define(name,size) -- no id
+ local specification = define.analyze(name,size)
+ local method = specification.method
+ if method and define.specify[method] then
+ specification = define.specify[method](specification)
+ end
+ specification = define.resolve(specification)
+ local hash = tfm.hash_instance(specification)
+ local id = define.registered(hash)
+ if not id then
+ local fontdata = tfm.read(specification)
+ if fontdata then
+ fontdata.hash = hash
+ id = font.define(fontdata)
+ define.register(fontdata,id)
+ tfm.cleanup_table(fontdata)
+ else
+ id = 0 -- signal
+ end
+ end
+ return fonts.ids[id], id
+end
+
+--[[ldx--
+<p>Next follow the readers. This code was written while <l n='luatex'/>
+evolved. Each one has its own way of dealing with its format.</p>
+--ldx]]--
+
+local function check_tfm(specification,fullname)
+ -- ofm directive blocks local path search unless set
+ fullname = input.findbinfile(fullname, 'ofm') or "" -- just to be sure
+ if fullname ~= "" then
+ specification.filename, specification.format = fullname, "ofm"
+ return tfm.read_from_tfm(specification)
+ end
+end
+
+local function check_afm(specification,fullname)
+ fullname = input.findbinfile(fullname, 'afm') or "" -- just to be sure
+ if fullname ~= "" then
+ specification.filename, specification.format = fullname, "afm"
+ return tfm.read_from_afm(specification)
+ end
+end
+
+function readers.tfm(specification)
+ local fullname, tfmtable = specification.filename or "", nil
+ if fullname == "" then
+ local forced = specification.forced or ""
+ if forced ~= "" then
+ tfmtable = check_tfm(specification,specification.name .. "." .. forced)
+ end
+ if not tfmtable then
+ tfmtable = check_tfm(specification,specification.name)
+ end
+ else
+ tfmtable = check_tfm(specification,fullname)
+ end
+ return tfmtable
+end
+
+function readers.afm(specification,method)
+ local fullname, tfmtable = specification.filename or "", nil
+ if fullname == "" then
+ local forced = specification.forced or ""
+ if forced ~= "" then
+ tfmtable = check_afm(specification,specification.name .. "." .. forced)
+ end
+ if not tfmtable then
+ method = method or define.method or "afm or tfm"
+ if method == "tfm" then
+ tfmtable = check_tfm(specification,fullname)
+ elseif method == "afm" then
+ tfmtable = check_afm(specification,fullname)
+ elseif method == "tfm or afm" then
+ tfmtable = check_tfm(specification,fullname) or check_afm(specification,fullname)
+ else-- method == "afm or tfm" then
+ tfmtable = check_afm(specification,fullname) or check_tfm(specification,fullname)
+ end
+ end
+ else
+ tfmtable = check_afm(specification,fullname)
+ end
+ return tfmtable
+end
+
+local function check_otf(specification,suffix,what)
+ local fullname, tfmtable = input.findbinfile(specification.name,suffix) or "", nil
+ if fullname == "" then
+ local fb = fonts.names.old_to_new[specification.name]
+ if fb then
+ fullname = input.findbinfile(fb,suffix) or ""
+ end
+ end
+ if fullname == "" then
+ local fb = fonts.names.new_to_old[specification.name]
+ if fb then
+ fullname = input.findbinfile(fb,suffix) or ""
+ end
+ end
+ if fullname ~= "" then
+ specification.filename, specification.format = fullname, what -- hm, so we do set the filename, then
+ tfmtable = tfm.read_from_open_type(specification) -- we need to do it for all matches / todo
+ end
+ return tfmtable
+end
+
+function readers.opentype(specification,suffix,what)
+ local forced = specification.forced or ""
+ if forced == "otf" then
+ return check_otf(specification,forced,"opentype")
+ elseif forced == "ttf" then
+ return check_otf(specification,forced,"truetype")
+ elseif forced == "ttf" then
+ return check_otf(specification,forced,"truetype")
+ else
+ return check_otf(specification,suffix,what)
+ end
+end
+
+function readers.otf(specification) return readers.opentype(specification,"otf","opentype") end
+function readers.ttf(specification) return readers.opentype(specification,"ttf","truetype") end
+function readers.ttc(specification) return readers.opentype(specification,"ttf","truetype") end -- !!
+
+--[[ldx--
+<p>We need to check for default features. For this we provide
+a helper function.</p>
+--ldx]]--
+
+function define.check(features,defaults) -- nb adapts features !
+ local done = false
+ if table.is_empty(features) then
+ features, done = table.fastcopy(defaults), true
+ else
+ for k,v in next, defaults do
+ if features[k] == nil then
+ features[k], done = v, true
+ end
+ end
+ end
+ return features, done -- done signals a change
+end
+
+--[[ldx--
+<p>So far the specifyers. Now comes the real definer. Here we cache
+based on id's. Here we also intercept the virtual font handler. Since
+it evolved stepwise I may rewrite this bit (combine code).</p>
+
+In the previously defined reader (the one resulting in a <l n='tfm'/>
+table) we cached the (scaled) instances. Here we cache them again, but
+this time based on id. We could combine this in one cache but this does
+not gain much. By the way, passing id's back to in the callback was
+introduced later in the development.</p>
+--ldx]]--
+
+define.last = nil
+
+function define.register(fontdata,id)
+ if fontdata and id then
+ local hash = fontdata.hash
+ if not tfm.internalized[hash] then
+ if trace_defining then
+ logs.report("define font","loading at 2 id %s, hash: %s",id or "?",hash or "?")
+ end
+ fonts.ids[id] = fontdata
+ tfm.internalized[hash] = id
+ end
+ end
+end
+
+function define.registered(hash)
+ local id = tfm.internalized[hash]
+ return id, id and fonts.ids[id]
+end
+
+local cache_them = false
+
+function tfm.make(specification)
+ -- currently fonts are scaled while constructing the font, so we
+ -- have to do scaling of commands in the vf at that point using
+ -- e.g. "local scale = g.factor or 1" after all, we need to work
+ -- with copies anyway and scaling needs to be done at some point;
+ -- however, when virtual tricks are used as feature (makes more
+ -- sense) we scale the commands in fonts.tfm.scale (and set the
+ -- factor there)
+ local fvm = define.methods[specification.features.vtf.preset]
+ if fvm then
+ return fvm(specification)
+ else
+ return nil
+ end
+end
+
+function define.read(specification,size,id) -- id can be optional, name can already be table
+ statistics.starttiming(fonts)
+ if type(specification) == "string" then
+ specification = define.analyze(specification,size)
+ end
+ local method = specification.method
+ if method and define.specify[method] then
+ specification = define.specify[method](specification)
+ end
+ specification = define.resolve(specification)
+ local hash = tfm.hash_instance(specification)
+ if cache_them then
+ local fontdata = containers.read(fonts.cache(),hash) -- for tracing purposes
+ end
+ local fontdata = define.registered(hash) -- id
+ if not fontdata then
+ if specification.features.vtf and specification.features.vtf.preset then
+ fontdata = tfm.make(specification)
+ else
+ fontdata = tfm.read(specification)
+ if fontdata then
+ tfm.check_virtual_id(fontdata)
+ end
+ end
+ if cache_them then
+ fontdata = containers.write(fonts.cache(),hash,fontdata) -- for tracing purposes
+ end
+ if fontdata then
+ fontdata.hash = hash
+ if id then
+ define.register(fontdata,id)
+ end
+ end
+ end
+ define.last = fontdata or id -- todo ! ! ! ! !
+ if not fontdata then
+ logs.report("define font", "unknown font %s, loading aborted",specification.name)
+ elseif trace_defining and type(fontdata) == "table" then
+ logs.report("define font","using %s font with id %s, n:%s s:%s b:%s e:%s p:%s f:%s",
+ fontdata.type or "unknown",
+ id or "?",
+ fontdata.name or "?",
+ fontdata.size or "default",
+ fontdata.encodingbytes or "?",
+ fontdata.encodingname or "unicode",
+ fontdata.fullname or "?",
+ file.basename(fontdata.filename or "?"))
+ end
+ statistics.stoptiming(fonts)
+ return fontdata
+end
+
+function vf.find(name)
+ name = file.removesuffix(file.basename(name))
+ if tfm.resolve_vf then
+ local format = fonts.logger.format(name)
+ if format == 'tfm' or format == 'ofm' then
+ if trace_defining then
+ logs.report("define font","locating vf for %s",name)
+ end
+ return input.findbinfile(name,"ovf")
+ else
+ if trace_defining then
+ logs.report("define font","vf for %s is already taken care of",name)
+ end
+ return nil -- ""
+ end
+ else
+ if trace_defining then
+ logs.report("define font","locating vf for %s",name)
+ end
+ return input.findbinfile(name,"ovf")
+ end
+end
+
+--[[ldx--
+<p>We overload both the <l n='tfm'/> and <l n='vf'/> readers.</p>
+--ldx]]--
+
+callback.register('define_font' , define.read)
+callback.register('find_vf_file', vf.find ) -- not that relevant any more
diff --git a/otfl-font-dum.lua b/otfl-font-dum.lua
new file mode 100644
index 0000000..f364152
--- /dev/null
+++ b/otfl-font-dum.lua
@@ -0,0 +1,85 @@
+if not modules then modules = { } end modules ['font-dum'] = {
+ version = 1.001,
+ comment = "companion to luatex-*.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+fonts = fonts or { }
+
+-- general
+
+fonts.otf.pack = false
+fonts.tfm.resolve_vf = false -- no sure about this
+
+-- readers
+
+fonts.tfm.readers = fonts.tfm.readers or { }
+fonts.tfm.readers.sequence = { 'otf', 'ttf', 'tfm' }
+fonts.tfm.readers.afm = nil
+
+-- define
+
+fonts.define = fonts.define or { }
+
+--~ fonts.define.method = "tfm"
+
+fonts.define.specify.colonized_default_lookup = "name"
+
+function fonts.define.get_specification(str)
+ return "", str, "", ":", str
+end
+
+-- logger
+
+fonts.logger = fonts.logger or { }
+
+function fonts.logger.save()
+end
+
+-- names
+
+fonts.names = fonts.names or { }
+
+fonts.names.basename = "luatex-fonts-names.lua"
+fonts.names.new_to_old = { }
+fonts.names.old_to_new = { }
+
+local data, loaded = nil, false
+
+function fonts.names.resolve(name,sub)
+ if not loaded then
+ local basename = fonts.names.basename
+ if basename and basename ~= "" then
+ for _, format in ipairs { "lua", "tex", "other text files" } do
+ local foundname = input.find_file(basename,format) or ""
+ if foundname ~= "" then
+ data = dofile(foundname)
+ if data then
+ local d = { }
+ for k, v in pairs(data.mapping) do
+ local t = v[1]
+ if t == "ttf" or t == "otf" or t == "ttc" then
+ d[k] = v
+ end
+ end
+ data.mapping = d
+ end
+ break
+ end
+ end
+ end
+ loaded = true
+ end
+ if type(data) == "table" and data.version == 1.07 then
+ local condensed = string.gsub(name,"[^%a%d]","")
+ local found = data.mapping and data.mapping[condensed]
+ if found then
+ local filename, is_sub = found[3], found[4]
+ return filename, is_sub
+ else
+ return name, false -- fallback to filename
+ end
+ end
+end
diff --git a/otfl-font-ini.lua b/otfl-font-ini.lua
new file mode 100644
index 0000000..248a2ba
--- /dev/null
+++ b/otfl-font-ini.lua
@@ -0,0 +1,92 @@
+if not modules then modules = { } end modules ['font-ini'] = {
+ version = 1.001,
+ comment = "companion to font-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+--[[ldx--
+<p>Not much is happening here.</p>
+--ldx]]--
+
+local utf = unicode.utf8
+
+if not fontloader then fontloader = fontforge end
+
+fontloader.totable = fontloader.to_table
+
+-- vtf comes first
+-- fix comes last
+
+fonts = fonts or { }
+fonts.ids = fonts.ids or { } -- aka fontdata
+fonts.tfm = fonts.tfm or { }
+
+fonts.mode = 'base'
+fonts.private = 0xF0000 -- 0x10FFFF
+fonts.verbose = false -- more verbose cache tables
+
+fonts.methods = fonts.methods or {
+ base = { tfm = { }, afm = { }, otf = { }, vtf = { }, fix = { } },
+ node = { tfm = { }, afm = { }, otf = { }, vtf = { }, fix = { } },
+}
+
+fonts.initializers = fonts.initializers or {
+ base = { tfm = { }, afm = { }, otf = { }, vtf = { }, fix = { } },
+ node = { tfm = { }, afm = { }, otf = { }, vtf = { }, fix = { } }
+}
+
+fonts.triggers = fonts.triggers or {
+ 'mode',
+ 'language',
+ 'script',
+ 'strategy',
+}
+
+fonts.processors = fonts.processors or {
+}
+
+fonts.manipulators = fonts.manipulators or {
+}
+
+fonts.define = fonts.define or { }
+fonts.define.specify = fonts.define.specify or { }
+fonts.define.specify.synonyms = fonts.define.specify.synonyms or { }
+
+-- tracing
+
+fonts.color = fonts.color or { }
+
+local attribute = attributes.private('color')
+local mapping = (attributes and attributes.list[attribute]) or { }
+
+local set_attribute = node.set_attribute
+local unset_attribute = node.unset_attribute
+
+function fonts.color.set(n,c)
+ local mc = mapping[c]
+ if not mc then
+ unset_attribute(n,attribute)
+ else
+ set_attribute(n,attribute,mc)
+ end
+end
+function fonts.color.reset(n)
+ unset_attribute(n,attribute)
+end
+
+-- this will change ...
+
+function fonts.show_char_data(n)
+ local tfmdata = fonts.ids[font.current()]
+ if tfmdata then
+ if type(n) == "string" then
+ n = utf.byte(n)
+ end
+ local chr = tfmdata.characters[n]
+ if chr then
+ texio.write_nl(table.serialize(chr,string.format("U_%04X",n)))
+ end
+ end
+end
diff --git a/otfl-font-ota.lua b/otfl-font-ota.lua
new file mode 100644
index 0000000..c6a5b29
--- /dev/null
+++ b/otfl-font-ota.lua
@@ -0,0 +1,305 @@
+if not modules then modules = { } end modules ['font-ota'] = {
+ version = 1.001,
+ comment = "companion to font-otf.lua (analysing)",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+-- this might become scrp-*.lua
+
+local type, tostring, match, format, concat = type, tostring, string.match, string.format, table.concat
+
+if not trackers then trackers = { register = function() end } end
+
+local trace_analyzing = false trackers.register("otf.analyzing", function(v) trace_analyzing = v end)
+local trace_cjk = false trackers.register("cjk.injections", function(v) trace_cjk = v end)
+
+trackers.register("cjk.analyzing","otf.analyzing")
+
+fonts = fonts or { }
+fonts.analyzers = fonts.analyzers or { }
+fonts.analyzers.initializers = fonts.analyzers.initializers or { node = { otf = { } } }
+fonts.analyzers.methods = fonts.analyzers.methods or { node = { otf = { } } }
+
+local otf = fonts.otf
+local tfm = fonts.tfm
+
+local initializers = fonts.analyzers.initializers
+local methods = fonts.analyzers.methods
+
+local glyph = node.id('glyph')
+local glue = node.id('glue')
+local penalty = node.id('penalty')
+
+local set_attribute = node.set_attribute
+local has_attribute = node.has_attribute
+local traverse_id = node.traverse_id
+local remove_node = nodes.remove
+
+local fontdata = fonts.ids
+local state = attributes.private('state')
+
+local fcs = (fonts.color and fonts.color.set) or function() end
+local fcr = (fonts.color and fonts.color.reset) or function() end
+
+local a_to_script = otf.a_to_script
+local a_to_language = otf.a_to_language
+
+local remove_node = node.remove
+local delete_node = nodes.delete
+local insert_node_after = node.insert_after
+local insert_node_before = node.insert_before
+local traverse_node_list = node.traverse
+
+-- in the future we will use language/script attributes instead of the
+-- font related value, but then we also need dynamic features which is
+-- somewhat slower; and .. we need a chain of them
+
+
+function fonts.initializers.node.otf.analyze(tfmdata,value,attr)
+ if attr and attr > 0 then
+ script, language = a_to_script[attr], a_to_language[attr]
+ else
+ script, language = tfmdata.script, tfmdata.language
+ end
+ local action = initializers[script]
+ if action then
+ if type(action) == "function" then
+ return action(tfmdata,value)
+ else
+ local action = action[language]
+ if action then
+ return action(tfmdata,value)
+ end
+ end
+ end
+ return nil
+end
+
+function fonts.methods.node.otf.analyze(head,font,attr)
+ local tfmdata = fontdata[font]
+ local script, language
+ if attr and attr > 0 then
+ script, language = a_to_script[attr], a_to_language[attr]
+ else
+ script, language = tfmdata.script, tfmdata.language
+ end
+ local action = methods[script]
+ if action then
+ if type(action) == "function" then
+ return action(head,font,attr)
+ else
+ action = action[language]
+ if action then
+ return action(head,font,attr)
+ end
+ end
+ end
+ return head, false
+end
+
+otf.features.register("analyze",true) -- we always analyze
+table.insert(fonts.triggers,"analyze") -- we need a proper function for doing this
+
+-- latin
+
+fonts.analyzers.methods.latn = fonts.analyzers.aux.setstate
+
+-- this info eventually will go into char-def
+
+local zwnj = 0x200C
+local zwj = 0x200D
+
+local isol = {
+ [0x0600] = true, [0x0601] = true, [0x0602] = true, [0x0603] = true,
+ [0x0608] = true, [0x060B] = true, [0x0621] = true, [0x0674] = true,
+ [0x06DD] = true, [zwnj] = true,
+}
+
+local isol_fina = {
+ [0x0622] = true, [0x0623] = true, [0x0624] = true, [0x0625] = true,
+ [0x0627] = true, [0x0629] = true, [0x062F] = true, [0x0630] = true,
+ [0x0631] = true, [0x0632] = true, [0x0648] = true, [0x0671] = true,
+ [0x0672] = true, [0x0673] = true, [0x0675] = true, [0x0676] = true,
+ [0x0677] = true, [0x0688] = true, [0x0689] = true, [0x068A] = true,
+ [0x068B] = true, [0x068C] = true, [0x068D] = true, [0x068E] = true,
+ [0x068F] = true, [0x0690] = true, [0x0691] = true, [0x0692] = true,
+ [0x0693] = true, [0x0694] = true, [0x0695] = true, [0x0696] = true,
+ [0x0697] = true, [0x0698] = true, [0x0699] = true, [0x06C0] = true,
+ [0x06C3] = true, [0x06C4] = true, [0x06C5] = true, [0x06C6] = true,
+ [0x06C7] = true, [0x06C8] = true, [0x06C9] = true, [0x06CA] = true,
+ [0x06CB] = true, [0x06CD] = true, [0x06CF] = true, [0x06D2] = true,
+ [0x06D3] = true, [0x06D5] = true, [0x06EE] = true, [0x06EF] = true,
+ [0x0759] = true, [0x075A] = true, [0x075B] = true, [0x076B] = true,
+ [0x076C] = true, [0x0771] = true, [0x0773] = true, [0x0774] = true,
+ [0x0778] = true, [0x0779] = true,
+}
+
+local isol_fina_medi_init = {
+ [0x0626] = true, [0x0628] = true, [0x062A] = true, [0x062B] = true,
+ [0x062C] = true, [0x062D] = true, [0x062E] = true, [0x0633] = true,
+ [0x0634] = true, [0x0635] = true, [0x0636] = true, [0x0637] = true,
+ [0x0638] = true, [0x0639] = true, [0x063A] = true, [0x063B] = true,
+ [0x063C] = true, [0x063D] = true, [0x063E] = true, [0x063F] = true,
+ [0x0640] = true, [0x0641] = true, [0x0642] = true, [0x0643] = true,
+ [0x0644] = true, [0x0645] = true, [0x0646] = true, [0x0647] = true,
+ [0x0649] = true, [0x064A] = true, [0x066E] = true, [0x066F] = true,
+ [0x0678] = true, [0x0679] = true, [0x067A] = true, [0x067B] = true,
+ [0x067C] = true, [0x067D] = true, [0x067E] = true, [0x067F] = true,
+ [0x0680] = true, [0x0681] = true, [0x0682] = true, [0x0683] = true,
+ [0x0684] = true, [0x0685] = true, [0x0686] = true, [0x0687] = true,
+ [0x069A] = true, [0x069B] = true, [0x069C] = true, [0x069D] = true,
+ [0x069E] = true, [0x069F] = true, [0x06A0] = true, [0x06A1] = true,
+ [0x06A2] = true, [0x06A3] = true, [0x06A4] = true, [0x06A5] = true,
+ [0x06A6] = true, [0x06A7] = true, [0x06A8] = true, [0x06A9] = true,
+ [0x06AA] = true, [0x06AB] = true, [0x06AC] = true, [0x06AD] = true,
+ [0x06AE] = true, [0x06AF] = true, [0x06B0] = true, [0x06B1] = true,
+ [0x06B2] = true, [0x06B3] = true, [0x06B4] = true, [0x06B5] = true,
+ [0x06B6] = true, [0x06B7] = true, [0x06B8] = true, [0x06B9] = true,
+ [0x06BA] = true, [0x06BB] = true, [0x06BC] = true, [0x06BD] = true,
+ [0x06BE] = true, [0x06BF] = true, [0x06C1] = true, [0x06C2] = true,
+ [0x06CC] = true, [0x06CE] = true, [0x06D0] = true, [0x06D1] = true,
+ [0x06FA] = true, [0x06FB] = true, [0x06FC] = true, [0x06FF] = true,
+ [0x0750] = true, [0x0751] = true, [0x0752] = true, [0x0753] = true,
+ [0x0754] = true, [0x0755] = true, [0x0756] = true, [0x0757] = true,
+ [0x0758] = true, [0x075C] = true, [0x075D] = true, [0x075E] = true,
+ [0x075F] = true, [0x0760] = true, [0x0761] = true, [0x0762] = true,
+ [0x0763] = true, [0x0764] = true, [0x0765] = true, [0x0766] = true,
+ [0x0767] = true, [0x0768] = true, [0x0769] = true, [0x076A] = true,
+ [0x076D] = true, [0x076E] = true, [0x076F] = true, [0x0770] = true,
+ [0x0772] = true, [0x0775] = true, [0x0776] = true, [0x0777] = true,
+ [0x077A] = true, [0x077B] = true, [0x077C] = true, [0x077D] = true,
+ [0x077E] = true, [0x077F] = true, [zwj] = true,
+}
+
+local arab_warned = { }
+
+-- todo: gref
+
+local function warning(current,what)
+ local char = current.char
+ if not arab_warned[char] then
+ log.report("analyze","arab: character %s (U+%04X) has no %s class", char, char, what)
+ arab_warned[char] = true
+ end
+end
+
+function fonts.analyzers.methods.nocolor(head,font,attr)
+ for n in traverse_node_list(head,glyph) do
+ if not font or n.font == font then
+ fcr(n)
+ end
+ end
+ return head, true
+end
+
+otf.remove_joiners = false -- true -- for idris who want it as option
+
+local function finish(first,last)
+ if last then
+ if first == last then
+ local fc = first.char
+ if isol_fina_medi_init[fc] or isol_fina[fc] then
+ set_attribute(first,state,4) -- isol
+ if trace_analyzing then fcs(first,"font:isol") end
+ else
+ warning(first,"isol")
+ set_attribute(first,state,0) -- error
+ if trace_analyzing then fcr(first) end
+ end
+ else
+ local lc = last.char
+ if isol_fina_medi_init[lc] or isol_fina[lc] then -- why isol here ?
+ -- if laststate == 1 or laststate == 2 or laststate == 4 then
+ set_attribute(last,state,3) -- fina
+ if trace_analyzing then fcs(last,"font:fina") end
+ else
+ warning(last,"fina")
+ set_attribute(last,state,0) -- error
+ if trace_analyzing then fcr(last) end
+ end
+ end
+ first, last = nil, nil
+ elseif first then
+ -- first and last are either both set so we never com here
+ local fc = first.char
+ if isol_fina_medi_init[fc] or isol_fina[fc] then
+ set_attribute(first,state,4) -- isol
+ if trace_analyzing then fcs(first,"font:isol") end
+ else
+ warning(first,"isol")
+ set_attribute(first,state,0) -- error
+ if trace_analyzing then fcr(first) end
+ end
+ first = nil
+ end
+ return first, last
+end
+
+function fonts.analyzers.methods.arab(head,font,attr) -- maybe make a special version with no trace
+ local tfmdata = fontdata[font]
+--~ local marks = tfmdata.shared.otfdata.luatex.marks
+ local marks = tfmdata.marks
+ local first, last, current, done = nil, nil, head, false
+ local removejoiners = otf.remove_joiners
+ local joiners = { }
+ while current do
+ if current.id == glyph and current.subtype<256 and current.font == font and not has_attribute(current,state) then
+ done = true
+ local char = current.char
+ if removejoiners and char == zwj or char == zwnj then
+ joiners[#joiners+1] = current
+ end
+ if marks[char] then
+ set_attribute(current,state,5) -- mark
+ if trace_analyzing then fcs(current,"font:mark") end
+ elseif isol[char] then -- can be zwj or zwnj too
+ first, last = finish(first,last)
+ set_attribute(current,state,4) -- isol
+ if trace_analyzing then fcs(current,"font:isol") end
+ first, last = nil, nil
+ elseif not first then
+ if isol_fina_medi_init[char] then
+ set_attribute(current,state,1) -- init
+ if trace_analyzing then fcs(current,"font:init") end
+ first, last = first or current, current
+ elseif isol_fina[char] then
+ set_attribute(current,state,4) -- isol
+ if trace_analyzing then fcs(current,"font:isol") end
+ first, last = nil, nil
+ else -- no arab
+ first, last = finish(first,last)
+ end
+ elseif isol_fina_medi_init[char] then
+ first, last = first or current, current
+ set_attribute(current,state,2) -- medi
+ if trace_analyzing then fcs(current,"font:medi") end
+ elseif isol_fina[char] then
+ if not has_attribute(last,state,1) then
+ -- tricky, we need to check what last may be !
+ set_attribute(last,state,2) -- medi
+ if trace_analyzing then fcs(last,"font:medi") end
+ end
+ set_attribute(current,state,3) -- fina
+ if trace_analyzing then fcs(current,"font:fina") end
+ first, last = nil, nil
+ elseif char >= 0x0600 and char <= 0x06FF then
+ if trace_analyzing then fcs(current,"font:rest") end
+ first, last = finish(first,last)
+ else --no
+ first, last = finish(first,last)
+ end
+ else
+ first, last = finish(first,last)
+ end
+ current = current.next
+ end
+ first, last = finish(first,last)
+ if removejoiners then
+ for i=1,#joiners do
+ head = delete_node(head,joiners[i]) -- was remove so no free
+ end
+ end
+ return head, done
+end
diff --git a/otfl-font-otb.lua b/otfl-font-otb.lua
new file mode 100644
index 0000000..20ddbfc
--- /dev/null
+++ b/otfl-font-otb.lua
@@ -0,0 +1,344 @@
+if not modules then modules = { } end modules ['font-otb'] = {
+ version = 1.001,
+ comment = "companion to font-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local concat = table.concat
+local format, gmatch, gsub, find, match, lower, strip = string.format, string.gmatch, string.gsub, string.find, string.match, string.lower, string.strip
+local type, next, tonumber, tostring = type, next, tonumber, tostring
+
+local otf = fonts.otf
+local tfm = fonts.tfm
+
+local trace_baseinit = false trackers.register("otf.baseinit", function(v) trace_baseinit = v end)
+local trace_singles = false trackers.register("otf.singles", function(v) trace_singles = v end)
+local trace_multiples = false trackers.register("otf.multiples", function(v) trace_multiples = v end)
+local trace_alternatives = false trackers.register("otf.alternatives", function(v) trace_alternatives = v end)
+local trace_ligatures = false trackers.register("otf.ligatures", function(v) trace_ligatures = v end)
+local trace_kerns = false trackers.register("otf.kerns", function(v) trace_kerns = v end)
+local trace_preparing = false trackers.register("otf.preparing", function(v) trace_preparing = v end)
+
+local wildcard = "*"
+
+local split_at_space = lpeg.Ct(lpeg.splitat(" ")) -- no trailing or multiple spaces anyway
+
+local pcache, fcache = { }, { } -- could be weak
+
+local function gref(descriptions,n)
+ if type(n) == "number" then
+ local name = descriptions[n].name
+ if name then
+ return format("U+%04X (%s)",n,name)
+ else
+ return format("U+%04X")
+ end
+ elseif n then
+ local num, nam = { }, { }
+ for i=1,#n do
+ local ni = n[i]
+ num[i] = format("U+%04X",ni)
+ nam[i] = descriptions[ni].name or "?"
+ end
+ return format("%s (%s)",concat(num," "), concat(nam," "))
+ else
+ return "?"
+ end
+end
+
+local function cref(kind,lookupname)
+ if lookupname then
+ return format("feature %s, lookup %s",kind,lookupname)
+ else
+ return format("feature %s",kind)
+ end
+end
+
+local function resolve_ligatures(tfmdata,ligatures,kind)
+ kind = kind or "unknown"
+ local unicodes = tfmdata.unicodes
+ local characters = tfmdata.characters
+ local descriptions = tfmdata.descriptions
+ local changed = tfmdata.changed
+ local done = { }
+ while true do
+ local ok = false
+ for k,v in next, ligatures do
+ local lig = v[1]
+ if not done[lig] then
+ local ligs = split_at_space:match(lig)
+ if #ligs == 2 then
+ local uc = v[2]
+ local c, f, s = characters[uc], ligs[1], ligs[2]
+ local uft, ust = unicodes[f] or 0, unicodes[s] or 0
+ if not uft or not ust then
+ logs.report("define otf","%s: unicode problem with base ligature %s = %s + %s",cref(kind),gref(descriptions,uc),gref(descriptions,uft),gref(descriptions,ust))
+ -- some kind of error
+ else
+ if type(uft) == "number" then uft = { uft } end
+ if type(ust) == "number" then ust = { ust } end
+ for ufi=1,#uft do
+ local uf = uft[ufi]
+ for usi=1,#ust do
+ local us = ust[usi]
+ if changed[uf] or changed[us] then
+ if trace_baseinit and trace_ligatures then
+ logs.report("define otf","%s: base ligature %s + %s ignored",cref(kind),gref(descriptions,uf),gref(descriptions,us))
+ end
+ else
+ local first, second = characters[uf], us
+ if first and second then
+ local t = first.ligatures
+ if not t then
+ t = { }
+ first.ligatures = t
+ end
+ if type(uc) == "number" then
+ t[second] = { type = 0, char = uc }
+ else
+ t[second] = { type = 0, char = uc[1] } -- can this still happen?
+ end
+ if trace_baseinit and trace_ligatures then
+ logs.report("define otf","%s: base ligature %s + %s => %s",cref(kind),gref(descriptions,uf),gref(descriptions,us),gref(descriptions,uc))
+ end
+ end
+ end
+ end
+ end
+ end
+ ok, done[lig] = true, descriptions[uc].name
+ end
+ end
+ end
+ if ok then
+ -- done has "a b c" = "a_b_c" and ligatures the already set ligatures: "a b" = 123
+ -- and here we add extras (f i i = fi + i and alike)
+ --
+ -- we could use a hash for fnc and pattern
+ --
+ -- this might be interfering !
+ for d,n in next, done do
+ local pattern = pcache[d] if not pattern then pattern = "^(" .. d .. ") " pcache[d] = pattern end
+ local fnc = fcache[n] if not fnc then fnc = function() return n .. " " end fcache[n] = fnc end
+ for k,v in next, ligatures do
+ v[1] = gsub(v[1],pattern,fnc)
+ end
+ end
+ else
+ break
+ end
+ end
+end
+
+local function collect_lookups(otfdata,kind,script,language)
+ -- maybe store this in the font
+ local sequences = otfdata.luatex.sequences
+ if sequences then
+ local featuremap, featurelist = { }, { }
+ for s=1,#sequences do
+ local sequence = sequences[s]
+ local features = sequence.features
+ features = features and features[kind]
+ features = features and (features[script] or features[wildcard])
+ features = features and (features[language] or features[wildcard])
+ if features then
+ local subtables = sequence.subtables
+ if subtables then
+ for s=1,#subtables do
+ local ss = subtables[s]
+ if not featuremap[s] then
+ featuremap[ss] = true
+ featurelist[#featurelist+1] = ss
+ end
+ end
+ end
+ end
+ end
+ if #featurelist > 0 then
+ return featuremap, featurelist
+ end
+ end
+ return nil, nil
+end
+
+local splitter = lpeg.splitat(" ")
+
+function prepare_base_substitutions(tfmdata,kind,value) -- we can share some code with the node features
+ if value then
+ local otfdata = tfmdata.shared.otfdata
+ local validlookups, lookuplist = collect_lookups(otfdata,kind,tfmdata.script,tfmdata.language)
+ if validlookups then
+ local ligatures = { }
+ local unicodes = tfmdata.unicodes -- names to unicodes
+ local indices = tfmdata.indices
+ local characters = tfmdata.characters
+ local descriptions = tfmdata.descriptions
+ local changed = tfmdata.changed
+ for k,c in next, characters do
+ local glyph = descriptions[k]
+ local lookups = glyph.lookups
+ if lookups then
+ for l=1,#lookuplist do
+ local lookup = lookuplist[l]
+ local ps = lookups[lookup]
+ if ps then
+ for i=1,#ps do
+ local p = ps[i]
+ local t = p[1]
+ if t == 'substitution' then
+ local pv = p[2] -- p.variant
+ if pv then
+ local upv = unicodes[pv]
+ if upv then
+ if type(upv) == "table" then
+ upv = upv[1]
+ end
+ if characters[upv] then
+ if trace_baseinit and trace_singles then
+ logs.report("define otf","%s: base substitution %s => %s",cref(kind,lookup),gref(descriptions,k),gref(descriptions,upv))
+ end
+ changed[k] = upv
+ end
+ end
+ end
+ elseif t == 'alternate' then
+ local pc = p[2] -- p.components
+ if pc then
+ -- a bit optimized ugliness
+ if value == 1 then
+ pc = splitter:match(pc)
+ elseif value == 2 then
+ local a, b = splitter:match(pc)
+ pc = b or a
+ else
+ pc = { splitter:match(pc) }
+ pc = pc[value] or pc[#pc]
+ end
+ if pc then
+ local upc = unicodes[pc]
+ if upc then
+ if type(upc) == "table" then
+ upc = upc[1]
+ end
+ if characters[upc] then
+ if trace_baseinit and trace_alternatives then
+ logs.report("define otf","%s: base alternate %s => %s",cref(kind,lookup),gref(descriptions,k),gref(descriptions,upc))
+ end
+ changed[k] = upc
+ end
+ end
+ end
+ end
+ elseif t == 'ligature' and not changed[k] then
+ local pc = p[2]
+ if pc then
+ if trace_baseinit and trace_ligatures then
+ local upc = { splitter:match(pc) }
+ for i=1,#upc do upc[i] = unicodes[upc[i]] end
+ -- we assume that it's no table
+ logs.report("define otf","%s: base ligature %s => %s",cref(kind,lookup),gref(descriptions,upc),gref(descriptions,k))
+ end
+ ligatures[#ligatures+1] = { pc, k }
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+ resolve_ligatures(tfmdata,ligatures,kind)
+ end
+ else
+ tfmdata.ligatures = tfmdata.ligatures or { } -- left over from what ?
+ end
+end
+
+local function prepare_base_kerns(tfmdata,kind,value) -- todo what kind of kerns, currently all
+ if value then
+ local otfdata = tfmdata.shared.otfdata
+ local validlookups, lookuplist = collect_lookups(otfdata,kind,tfmdata.script,tfmdata.language)
+ if validlookups then
+ local unicodes = tfmdata.unicodes -- names to unicodes
+ local indices = tfmdata.indices
+ local characters = tfmdata.characters
+ local descriptions = tfmdata.descriptions
+ for u, chr in next, characters do
+ local d = descriptions[u]
+ if d then
+ local dk = d.mykerns
+ if dk then
+ local t, done = chr.kerns or { }, false
+ for l=1,#lookuplist do
+ local lookup = lookuplist[l]
+ local kerns = dk[lookup]
+ if kerns then
+ for k, v in next, kerns do
+ if v ~= 0 and not t[k] then -- maybe no 0 test here
+ t[k], done = v, true
+ if trace_baseinit and trace_kerns then
+ logs.report("define otf","%s: base kern %s + %s => %s",cref(kind,lookup),gref(descriptions,u),gref(descriptions,k),v)
+ end
+ end
+ end
+ end
+ end
+ if done then
+ chr.kerns = t -- no empty assignments
+ end
+ -- elseif d.kerns then
+ -- logs.report("define otf","%s: invalid mykerns for %s",cref(kind),gref(descriptions,u))
+ end
+ end
+ end
+ end
+ end
+end
+
+-- In principle we could register each feature individually which was
+-- what we did in earlier versions. However, after the rewrite it
+-- made more sense to collect them in an overall features initializer
+-- just as with the node variant. There it was needed because we need
+-- to do complete mixed runs and not run featurewise (as we did before).
+
+local supported_gsub = {
+ 'liga','dlig','rlig','hlig',
+ 'pnum','onum','tnum','lnum',
+ 'zero',
+ 'smcp','cpsp','c2sc','ornm','aalt',
+ 'hwid','fwid',
+ 'ssty', -- math
+}
+
+local supported_gpos = {
+ 'kern'
+}
+
+function otf.features.register_base_substitution(tag)
+ supported_gsub[#supported_gsub+1] = tag
+end
+function otf.features.register_base_kern(tag)
+ supported_gsub[#supported_gpos+1] = tag
+end
+
+function fonts.initializers.base.otf.features(tfmdata,value)
+ if true then -- value then
+ -- not shared
+ local t = trace_preparing and os.clock()
+ local features = tfmdata.shared.features
+ if features then
+ for f=1,#supported_gsub do
+ local feature = supported_gsub[f]
+ prepare_base_substitutions(tfmdata,feature,features[feature])
+ end
+ for f=1,#supported_gpos do
+ local feature = supported_gpos[f]
+ prepare_base_kerns(tfmdata,feature,features[feature])
+ end
+ end
+ if trace_preparing then
+ logs.report("otf define","preparation time is %0.3f seconds for %s",os.clock()-t,tfmdata.fullname or "?")
+ end
+ end
+end
diff --git a/otfl-font-otc.lua b/otfl-font-otc.lua
new file mode 100644
index 0000000..840d4a9
--- /dev/null
+++ b/otfl-font-otc.lua
@@ -0,0 +1,127 @@
+if not modules then modules = { } end modules ['font-otc'] = {
+ version = 1.001,
+ comment = "companion to font-otf.lua (context)",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local format, insert = string.format, table.insert
+local type, next = type, next
+
+-- we assume that the other otf stuff is loaded already
+
+local trace_loading = false trackers.register("otf.loading", function(v) trace_loading = v end)
+
+local otf = fonts.otf
+local tfm = fonts.tfm
+
+-- for good old times (usage is to be avoided)
+
+local tlig_list = {
+ endash = "hyphen hyphen",
+ emdash = "hyphen hyphen hyphen",
+--~ quotedblleft = "quoteleft quoteleft",
+--~ quotedblright = "quoteright quoteright",
+--~ quotedblleft = "grave grave",
+--~ quotedblright = "quotesingle quotesingle",
+--~ quotedblbase = "comma comma",
+}
+local trep_list = {
+--~ [0x0022] = 0x201D,
+ [0x0027] = 0x2019,
+--~ [0x0060] = 0x2018,
+}
+
+-- instead of "script = "DFLT", langs = { 'dflt' }" we now use wildcards (we used to
+-- have always); some day we can write a "force always when true" trick for other
+-- features as well
+
+local tlig_feature = {
+ features = { { scripts = { { script = "*", langs = { "*" }, } }, tag = "tlig", comment = "added bij mkiv" }, },
+ name = "ctx_tlig",
+ subtables = { { name = "ctx_tlig_1" } },
+ type = "gsub_ligature",
+ flags = { },
+}
+local trep_feature = {
+ features = { { scripts = { { script = "*", langs = { "*" }, } }, tag = "trep", comment = "added bij mkiv" }, },
+ name = "ctx_trep",
+ subtables = { { name = "ctx_trep_1" } },
+ type = "gsub_single",
+ flags = { },
+}
+
+fonts.otf.enhancers["enrich with features"] = function(data,filename)
+ local glyphs = data.glyphs
+ local indices = data.map.map
+ for unicode, index in next, indices do
+ local glyph = glyphs[index]
+ local l = tlig_list[glyph.name]
+ if l then
+ local o = glyph.lookups or { }
+ o["ctx_tlig_1"] = { { "ligature", l, glyph.name } }
+ glyph.lookups = o
+ end
+ local r = trep_list[unicode]
+ if r then
+ local replacement = indices[r]
+ if replacement then
+ local o = glyph.lookups or { }
+ o["ctx_trep_1"] = { { "substitution", glyphs[replacement].name } } ---
+ glyph.lookups = o
+ end
+ end
+ end
+ data.gsub = data.gsub or { }
+ if trace_loading then
+ logs.report("load otf","enhance: registering tlig feature")
+ end
+ insert(data.gsub,1,table.fastcopy(tlig_feature))
+ if trace_loading then
+ logs.report("load otf","enhance: registering trep feature")
+ end
+ insert(data.gsub,1,table.fastcopy(trep_feature))
+end
+
+otf.tables.features['tlig'] = 'TeX Ligatures'
+otf.tables.features['trep'] = 'TeX Replacements'
+
+otf.features.register_base_substitution('tlig')
+otf.features.register_base_substitution('trep')
+
+-- the functionality is defined elsewhere
+
+fonts.initializers.base.otf.equaldigits = fonts.initializers.common.equaldigits
+fonts.initializers.node.otf.equaldigits = fonts.initializers.common.equaldigits
+
+fonts.initializers.base.otf.lineheight = fonts.initializers.common.lineheight
+fonts.initializers.node.otf.lineheight = fonts.initializers.common.lineheight
+
+fonts.initializers.base.otf.compose = fonts.initializers.common.compose
+fonts.initializers.node.otf.compose = fonts.initializers.common.compose
+
+-- bonus function
+
+function otf.name_to_slot(name) -- todo: afm en tfm
+ local tfmdata = fonts.ids[font.current()]
+ if tfmdata and tfmdata.shared then
+ local otfdata = tfmdata.shared.otfdata
+ local unicode = otfdata.luatex.unicodes[name]
+ if type(unicode) == "number" then
+ return unicode
+ else
+ return unicode[1]
+ end
+ end
+ return nil
+end
+
+function otf.char(n) -- todo: afm en tfm
+ if type(n) == "string" then
+ n = otf.name_to_slot(n)
+ end
+ if n then
+ tex.sprint(tex.ctxcatcodes,format("\\char%s ",n))
+ end
+end
diff --git a/otfl-font-otf.lua b/otfl-font-otf.lua
new file mode 100644
index 0000000..9c1e6f0
--- /dev/null
+++ b/otfl-font-otf.lua
@@ -0,0 +1,1577 @@
+if not modules then modules = { } end modules ['font-otf'] = {
+ version = 1.001,
+ comment = "companion to font-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local utf = unicode.utf8
+
+local concat, getn, utfbyte = table.concat, table.getn, utf.byte
+local format, gmatch, gsub, find, match, lower, strip = string.format, string.gmatch, string.gsub, string.find, string.match, string.lower, string.strip
+local type, next, tonumber, tostring = type, next, tonumber, tostring
+
+local trace_private = false trackers.register("otf.private", function(v) trace_private = v end)
+local trace_loading = false trackers.register("otf.loading", function(v) trace_loading = v end)
+local trace_features = false trackers.register("otf.features", function(v) trace_features = v end)
+local trace_dynamics = false trackers.register("otf.dynamics", function(v) trace_dynamics = v end)
+local trace_sequences = false trackers.register("otf.sequences", function(v) trace_sequences = v end)
+local trace_math = false trackers.register("otf.math", function(v) trace_math = v end)
+
+--~ trackers.enable("otf.loading")
+
+local zwnj = 0x200C
+local zwj = 0x200D
+
+--[[ldx--
+<p>The fontforge table has organized lookups in a certain way. A first implementation
+of this code was organized featurewise: information related to features was
+collected and processing boiled down to a run over the features. The current
+implementation honors the order in the main feature table. Since we can reorder this
+table as we want, we can eventually support several models of processing. We kept
+the static as well as dynamic feature processing, because it had proved to be
+rather useful. The formerly three loop variants have beem discarded but will
+reapear at some time.</p>
+
+<itemize>
+<item>we loop over all lookups</item>
+<item>for each lookup we do a run over the list of glyphs</item>
+<item>but we only process them for features that are enabled</item>
+<item>if we're dealing with a contextual lookup, we loop over all contexts</item>
+<item>in that loop we quit at a match and then process the list of sublookups</item>
+<item>we always continue after the match</item>
+</itemize>
+
+<p>In <l n='context'/> we do this for each font that is used in a list, so in
+practice we have quite some nested loops.</p>
+
+<p>We process the whole list and then consult the glyph nodes. An alternative approach
+is to collect strings of characters using the same font including spaces (because some
+lookups involve spaces). However, we then need to reconstruct the list which is no fun.
+Also, we need to carry quite some information, like attributes, so eventually we don't
+gain much (if we gain something at all).</p>
+
+<p>Another consideration has been to operate on sublists (subhead, subtail) but again
+this would complicate matters as we then neext to keep track of a changing subhead
+and subtail. On the other hand, this might save some runtime. The number of changes
+involved is not that large. This only makes sense when we have many fonts in a list
+and don't change to frequently.</p>
+--ldx]]--
+
+fonts = fonts or { }
+fonts.otf = fonts.otf or { }
+
+local otf = fonts.otf
+local tfm = fonts.tfm
+
+local fontdata = fonts.ids
+
+otf.tables = otf.tables or { } -- defined in font-ott.lua
+otf.meanings = otf.meanings or { } -- defined in font-ott.lua
+otf.tables.features = otf.tables.features or { } -- defined in font-ott.lua
+otf.tables.languages = otf.tables.languages or { } -- defined in font-ott.lua
+otf.tables.scripts = otf.tables.scripts or { } -- defined in font-ott.lua
+
+otf.features = otf.features or { }
+otf.features.list = otf.features.list or { }
+otf.features.default = otf.features.default or { }
+
+otf.enhancers = otf.enhancers or { }
+
+otf.version = 2.617
+otf.pack = true
+otf.enhance_data = false
+otf.syncspace = true
+otf.notdef = false
+otf.cache = containers.define("fonts", "otf", otf.version, true)
+
+--[[ldx--
+<p>We start with a lot of tables and related functions.</p>
+--ldx]]--
+
+otf.tables.global_fields = table.tohash {
+ "lookups",
+ "glyphs",
+ "subfonts",
+ "luatex",
+ "pfminfo",
+ "cidinfo",
+ "tables",
+ "names",
+ "unicodes",
+ "names",
+ "anchor_classes",
+ "kern_classes",
+ "gpos",
+ "gsub"
+}
+
+otf.tables.valid_fields = {
+ "anchor_classes",
+ "ascent",
+ "cache_version",
+ "cidinfo",
+ "copyright",
+ "creationtime",
+ "descent",
+ "design_range_bottom",
+ "design_range_top",
+ "design_size",
+ "encodingchanged",
+ "extrema_bound",
+ "familyname",
+ "fontname",
+ "fontstyle_id",
+ "fontstyle_name",
+ "fullname",
+ "glyphs",
+ "hasvmetrics",
+ "head_optimized_for_cleartype",
+ "horiz_base",
+ "issans",
+ "isserif",
+ "italicangle",
+ "kerns",
+ "lookups",
+ -- "luatex",
+ "macstyle",
+ "modificationtime",
+ "onlybitmaps",
+ "origname",
+ "os2_version",
+ "pfminfo",
+ "private",
+ "serifcheck",
+ "sfd_version",
+ -- "size",
+ "strokedfont",
+ "strokewidth",
+ "subfonts",
+ "table_version",
+ -- "tables",
+ -- "ttf_tab_saved",
+ "ttf_tables",
+ "uni_interp",
+ "uniqueid",
+ "units_per_em",
+ "upos",
+ "use_typo_metrics",
+ "uwidth",
+ "validation_state",
+ "verbose",
+ "version",
+ "vert_base",
+ "weight",
+ "weight_width_slope_only",
+ "xuid",
+}
+
+--[[ldx--
+<p>Here we go.</p>
+--ldx]]--
+
+local function load_featurefile(ff,featurefile)
+ if featurefile then
+ featurefile = input.find_file(file.addsuffix(featurefile,'fea')) -- "FONTFEATURES"
+ if featurefile and featurefile ~= "" then
+ if trace_loading then
+ logs.report("load otf", "featurefile: %s", featurefile)
+ end
+ fontloader.apply_featurefile(ff, featurefile)
+ end
+ end
+end
+
+function otf.enhance(name,data,filename,verbose)
+ local enhancer = otf.enhancers[name]
+ if enhancer then
+ if (verbose ~= nil and verbose) or trace_loading then
+ logs.report("load otf","enhance: %s",name)
+ end
+ enhancer(data,filename)
+ end
+end
+
+local enhancers = {
+ -- pack and unpack are handled separately; they might even be moved
+ -- away from the enhancers namespace
+ "patch bugs",
+ "merge cid fonts", "prepare unicode", "cleanup ttf tables", "compact glyphs", "reverse coverage",
+ "enrich with features",
+ "reorganize kerns", -- moved here
+ "flatten glyph lookups", "flatten anchor tables", "flatten feature tables",
+ "prepare luatex tables", "analyse features", "analyse anchors", "analyse marks", "analyse unicodes", "analyse subtables",
+ "check italic correction","check math",
+ "share widths",
+ "strip not needed data",
+}
+
+function otf.load(filename,format,sub,featurefile)
+ local name = file.basename(file.removesuffix(filename))
+ if featurefile then
+ name = name .. "@" .. file.removesuffix(file.basename(featurefile))
+ end
+ if sub == "" then sub = false end
+ local hash = name
+ if sub then -- name cleanup will move to cache code
+ hash = hash .. "-" .. sub
+ hash = lower(hash)
+ hash = gsub(hash,"[^%w%d]+","-")
+ end
+ local data = containers.read(otf.cache(), hash)
+ local size = lfs.attributes(filename,"size") or 0
+ if not data or data.verbose ~= fonts.verbose or data.size ~= size then
+ logs.report("load otf","loading: %s",filename)
+ local ff, messages
+ if sub then
+ ff, messages = fontloader.open(filename,sub)
+ else
+ ff, messages = fontloader.open(filename)
+ end
+ if trace_loading and messages and #messages > 0 then
+ for m=1,#messages do
+ logs.report("load otf","warning: %s",messages[m])
+ end
+ end
+ if ff then
+ load_featurefile(ff,featurefile)
+ data = fontloader.to_table(ff)
+ fontloader.close(ff)
+ if data then
+ logs.report("load otf","file size: %s", size)
+ logs.report("load otf","enhancing ...")
+ for e=1,#enhancers do
+ otf.enhance(enhancers[e],data,filename)
+ end
+ if otf.pack and not fonts.verbose then
+ otf.enhance("pack",data,filename)
+ end
+ data.size = size
+ data.verbose = fonts.verbose
+ logs.report("load otf","saving in cache: %s",filename)
+ data = containers.write(otf.cache(), hash, data)
+ collectgarbage("collect")
+ data = containers.read(otf.cache(), hash) -- this frees the old table and load the sparse one
+ collectgarbage("collect")
+ else
+ logs.report("load otf","loading failed (table conversion error)")
+ end
+ else
+ logs.report("load otf","loading failed (file read error)")
+ end
+ end
+ if data then
+ otf.enhance("unpack",data,filename,false) -- no mesage here
+ otf.add_dimensions(data)
+ if trace_sequences then
+ otf.show_feature_order(data,filename)
+ end
+ end
+ return data
+end
+
+function otf.add_dimensions(data)
+ -- todo: forget about the width if it's the defaultwidth (saves mem)
+ -- we could also build the marks hash here (instead of storing it)
+ if data then
+ local force = otf.notdef
+ local luatex = data.luatex
+ local defaultwidth = luatex.defaultwidth or 0
+ local defaultheight = luatex.defaultheight or 0
+ local defaultdepth = luatex.defaultdepth or 0
+ for _, d in next, data.glyphs do
+ local bb, wd = d.boundingbox, d.width
+ if not wd then
+ d.width = defaultwidth
+ elseif wd ~= 0 and d.class == "mark" then
+ d.width = -wd
+ end
+ if force and not d.name then
+ d.name = ".notdef"
+ end
+ if bb then
+ local ht, dp = bb[4], -bb[2]
+ if ht == 0 or ht < 0 then
+ -- no need to set it and no negative heights, nil == 0
+ else
+ d.height = ht
+ end
+ if dp == 0 or dp < 0 then
+ -- no negative depths and no negative depths, nil == 0
+ else
+ d.depth = dp
+ end
+ end
+ end
+ end
+end
+
+function otf.show_feature_order(otfdata,filename)
+ local sequences = otfdata.luatex.sequences
+ if sequences and #sequences > 0 then
+ if trace_loading then
+ logs.report("otf check","font %s has %s sequences",filename,#sequences)
+ logs.report("otf check"," ")
+ end
+ for nos=1,#sequences do
+ local sequence = sequences[nos]
+ local typ = sequence.type or "no-type"
+ local name = sequence.name or "no-name"
+ local subtables = sequence.subtables or { "no-subtables" }
+ local features = sequence.features
+ if trace_loading then
+ logs.report("otf check","%3i %-15s %-20s [%s]",nos,name,typ,concat(subtables,","))
+ end
+ if features then
+ for feature, scripts in next, features do
+ local tt = { }
+ for script, languages in next, scripts do
+ local ttt = { }
+ for language, _ in next, languages do
+ ttt[#ttt+1] = language
+ end
+ tt[#tt+1] = format("[%s: %s]",script,concat(ttt," "))
+ end
+ if trace_loading then
+ logs.report("otf check"," %s: %s",feature,concat(tt," "))
+ end
+ end
+ end
+ end
+ if trace_loading then
+ logs.report("otf check","\n")
+ end
+ elseif trace_loading then
+ logs.report("otf check","font %s has no sequences",filename)
+ end
+end
+
+-- todo: normalize, design_size => designsize
+
+otf.enhancers["prepare luatex tables"] = function(data,filename)
+ data.luatex = data.luatex or { }
+ local luatex = data.luatex
+ luatex.filename = filename
+ luatex.version = otf.version
+ luatex.creator = "context mkiv"
+end
+
+local function analyze_features(g, features)
+ if g then
+ local t, done = { }, { }
+ for k=1,#g do
+ local f = features or g[k].features
+ if f then
+ for k=1,#f do
+ -- scripts and tag
+ local tag = f[k].tag
+ if not done[tag] then
+ t[#t+1] = tag
+ done[tag] = true
+ end
+ end
+ end
+ end
+ if #t > 0 then
+ return t
+ end
+ end
+ return nil
+end
+
+otf.enhancers["analyse features"] = function(data,filename)
+ local luatex = data.luatex
+ luatex.gposfeatures = analyze_features(data.gpos)
+ luatex.gsubfeatures = analyze_features(data.gsub)
+end
+
+otf.enhancers["analyse anchors"] = function(data,filename)
+ local classes = data.anchor_classes
+ local luatex = data.luatex
+ local anchor_to_lookup, lookup_to_anchor = { }, { }
+ luatex.anchor_to_lookup, luatex.lookup_to_anchor = anchor_to_lookup, lookup_to_anchor
+ if classes then
+ for c=1,#classes do
+ local class = classes[c]
+ local anchor = class.name
+ local lookups = class.lookup
+ if type(lookups) ~= "table" then
+ lookups = { lookups }
+ end
+ local a = anchor_to_lookup[anchor]
+ if not a then a = { } anchor_to_lookup[anchor] = a end
+ for l=1,#lookups do
+ local lookup = lookups[l]
+ local l = lookup_to_anchor[lookup]
+ if not l then l = { } lookup_to_anchor[lookup] = l end
+ l[anchor] = true
+ a[lookup] = true
+ end
+ end
+ end
+end
+
+otf.enhancers["analyse marks"] = function(data,filename)
+ local glyphs = data.glyphs
+ local marks = { }
+ data.luatex.marks = marks
+ for unicode, index in next, data.luatex.indices do
+ local glyph = glyphs[index]
+ if glyph.class == "mark" then
+ marks[unicode] = true
+ end
+ end
+end
+
+local other = lpeg.C((1 - lpeg.S("_."))^0)
+local ligsplitter = lpeg.Ct(other * (lpeg.P("_") * other)^0)
+
+--~ print(splitter:match("this"))
+--~ print(splitter:match("this.that"))
+--~ print(splitter:match("such_so_more"))
+--~ print(splitter:match("such_so_more.that"))
+
+otf.enhancers["analyse unicodes"] = function(data,filename)
+ local unicodes = data.luatex.unicodes
+ unicodes['space'] = unicodes['space'] or 32 -- handly later on
+ unicodes['hyphen'] = unicodes['hyphen'] or 45 -- handly later on
+ unicodes['zwj'] = unicodes['zwj'] or zwj -- handly later on
+ unicodes['zwnj'] = unicodes['zwnj'] or zwnj -- handly later on
+ -- the tounicode mapping is sparse and only needed for alternatives
+ local tounicode, originals, ns, nl, private, unknown = { }, { }, 0, 0, fonts.private, format("%04X",utfbyte("?"))
+ data.luatex.tounicode, data.luatex.originals = tounicode, originals
+ for index, glyph in next, data.glyphs do
+ local name, unic = glyph.name, glyph.unicode or -1 -- play safe
+ if unic == -1 or unic >= private or (unic >= 0xE000 and unic <= 0xF8FF) or unic == 0xFFFE or unic == 0xFFFF then
+ -- a.whatever or a_b_c.whatever or a_b_c
+ local split = ligsplitter:match(name)
+ if #split == 0 then
+ -- skip
+ elseif #split == 1 then
+ local u = unicodes[split[1]]
+ if u then
+ if type(u) == "table" then
+ u = u[1]
+ end
+ if u < 0x10000 then
+ originals[index], tounicode[index] = u, format("%04X",u)
+ else
+ originals[index], tounicode[index] = u, format("%04X%04X",u/1024+0xD800,u%1024+0xDC00)
+ end
+ ns = ns + 1
+ else
+ originals[index], tounicode[index] = 0xFFFD, "FFFD"
+ end
+ else
+ local as = { }
+ for l=1,#split do
+ local u = unicodes[split[l]]
+ if not u then
+ as[l], split[l] = 0xFFFD, "FFFD"
+ else
+ if type(u) == "table" then
+ u = u[1]
+ end
+ if u < 0x10000 then
+ as[l], split[l] = u, format("%04X",u)
+ else
+ as[l], split[l] = u, format("%04X%04X",u/1024+0xD800,u%1024+0xDC00)
+ end
+ end
+ end
+ split = concat(split)
+ if split ~= "" then
+ originals[index], tounicode[index] = as, split
+ nl = nl + 1
+ else
+ originals[index], tounicode[index] = 0xFFFD, "FFFD"
+ end
+ end
+ end
+ end
+ if trace_loading and (ns > 0 or nl > 0) then
+ logs.report("load otf","enhance: %s tounicode entries added (%s ligatures)",nl+ns, ns)
+ end
+end
+
+otf.enhancers["analyse subtables"] = function(data,filename)
+ data.luatex = data.luatex or { }
+ local luatex = data.luatex
+ local sequences = { }
+ local lookups = { }
+ luatex.sequences = sequences
+ luatex.lookups = lookups
+ for _, g in next, { data.gsub, data.gpos } do
+ for k=1,#g do
+ local gk = g[k]
+
+local typ = gk.type
+if typ == "gsub_contextchain" or typ == "gpos_contextchain" then
+ gk.chain = 1
+elseif typ == "gsub_reversecontextchain" or typ == "gpos_reversecontextchain" then
+ gk.chain = -1
+else
+ gk.chain = 0
+end
+
+ local features = gk.features
+ if features then
+ sequences[#sequences+1] = gk
+ -- scripts, tag, ismac
+ local t = { }
+ for f=1,#features do
+ local feature = features[f]
+ local hash = { }
+ -- only script and langs matter
+ for s, languages in next, feature.scripts do
+ s = lower(s)
+ local h = hash[s]
+ if not h then h = { } hash[s] = h end
+ for l=1,#languages do
+ h[strip(lower(languages[l]))] = true
+ end
+ end
+ t[feature.tag] = hash
+ end
+ gk.features = t
+ else
+ lookups[gk.name] = gk
+ gk.name = nil
+ end
+ local subtables = gk.subtables
+ if subtables then
+ local t = { }
+ for s=1,#subtables do
+ local subtable = subtables[s]
+ local name = subtable.name
+ t[#t+1] = name
+ end
+ gk.subtables = t
+ end
+ local flags = gk.flags
+ if flags then
+ gk.flags = { -- forcing false packs nicer
+ (flags.ignorecombiningmarks and "mark") or false,
+ (flags.ignoreligatures and "ligature") or false,
+ (flags.ignorebaseglyphs and "base") or false,
+ flags.r2l or false
+ }
+ end
+ end
+ end
+end
+
+otf.enhancers["merge cid fonts"] = function(data,filename)
+ -- we can also move the names to data.luatex.names which might
+ -- save us some more memory (at the cost of harder tracing)
+ if data.subfonts and table.is_empty(data.glyphs) then
+ local cidinfo = data.cidinfo
+ local verbose = fonts.verbose
+ if cidinfo.registry then
+ local cidmap = fonts.cid.getmap and fonts.cid.getmap(cidinfo.registry,cidinfo.ordering,cidinfo.supplement)
+ if cidmap then
+ local glyphs, uni_to_int, int_to_uni, nofnames, nofunicodes = { }, { }, { }, 0, 0
+ local unicodes, names = cidmap.unicodes, cidmap.names
+ for n, subfont in next, data.subfonts do
+ for index, g in next, subfont.glyphs do
+ if not next(g) then
+ -- dummy entry
+ else
+ local unicode, name = unicodes[index], names[index]
+ g.cidindex = n
+ g.boundingbox = g.boundingbox -- or zerobox
+ g.name = g.name or name or "unknown"
+ if unicode then
+ uni_to_int[unicode] = index
+ int_to_uni[index] = unicode
+ nofunicodes = nofunicodes + 1
+ g.unicode = unicode
+ elseif name then
+ nofnames = nofnames + 1
+ g.unicode = -1
+ end
+ glyphs[index] = g
+ end
+ end
+ subfont.glyphs = nil
+ end
+ if trace_loading then
+ logs.report("load otf","cid font remapped, %s unicode points, %s symbolic names, %s glyphs",nofunicodes, nofnames, nofunicodes+nofnames)
+ end
+ data.glyphs = glyphs
+ data.map = data.map or { }
+ data.map.map = uni_to_int
+ data.map.backmap = int_to_uni
+ elseif trace_loading then
+ logs.report("load otf","unable to remap cid font, missing cid file for %s",filename)
+ end
+ elseif trace_loading then
+ logs.report("load otf","font %s has no glyphs",filename)
+ end
+ end
+end
+
+otf.enhancers["prepare unicode"] = function(data,filename)
+ local luatex = data.luatex
+ if not luatex then luatex = { } data.luatex = luatex end
+ local indices, unicodes, multiples, internals = { }, { }, { }, { }
+ local glyphs = data.glyphs
+ local mapmap = data.map.map
+ local criterium = fonts.private
+ local private = fonts.private
+ for index, glyph in next, glyphs do
+ if index > 0 then
+ local name = glyph.name
+ if name then
+ local unicode = glyph.unicode
+ if unicode == -1 or unicode >= criterium then
+ glyph.unicode = private
+ indices[private] = index
+ unicodes[name] = private
+ internals[index] = true
+ if trace_private then
+ logs.report("load otf","enhance: glyph %s at index U+%04X is moved to private unicode slot U+%04X",name,index,private)
+ end
+ private = private + 1
+ else
+ indices[unicode] = index
+ unicodes[name] = unicode
+ end
+ end
+ end
+ end
+ -- beware: the indeces table is used to initialize the tfm table
+ for unicode, index in next, mapmap do
+ if not internals[index] then
+ local name = glyphs[index].name
+ if name then
+ local un = unicodes[name]
+ if not un then
+ unicodes[name] = unicode -- or 0
+ elseif type(un) == "number" then
+ if un ~= unicode then
+ multiples[#multiples+1] = name
+ unicodes[name] = { un, unicode }
+ indices[unicode] = index
+ end
+ else
+ local ok = false
+ for u=1,#un do
+ if un[u] == unicode then
+ ok = true
+ break
+ end
+ end
+ if not ok then
+ multiples[#multiples+1] = name
+ un[#un+1] = unicode
+ indices[unicode] = index
+ end
+ end
+ end
+ end
+ end
+ if trace_loading then
+ if #multiples > 0 then
+ logs.report("load otf","%s glyph are reused: %s",#multiples, concat(multiples," "))
+ else
+ logs.report("load otf","no glyph are reused")
+ end
+ end
+ luatex.indices = indices
+ luatex.unicodes = unicodes
+ luatex.private = private
+end
+
+otf.enhancers["cleanup ttf tables"] = function(data,filename)
+ local ttf_tables = data.ttf_tables
+ if ttf_tables then
+ for k=1,#ttf_tables do
+ if ttf_tables[k].data then ttf_tables[k].data = "deleted" end
+ end
+ end
+ data.ttf_tab_saved = nil
+end
+
+otf.enhancers["compact glyphs"] = function(data,filename)
+ table.compact(data.glyphs) -- needed?
+ if data.subfonts then
+ for _, subfont in next, data.subfonts do
+ table.compact(subfont.glyphs) -- needed?
+ end
+ end
+end
+
+otf.enhancers["reverse coverage"] = function(data,filename)
+ -- we prefer the before lookups in a normal order
+ if data.lookups then
+ for _, v in next, data.lookups do
+ if v.rules then
+ for _, vv in next, v.rules do
+ local c = vv.coverage
+ if c and c.before then
+ c.before = table.reverse(c.before)
+ end
+ end
+ end
+ end
+ end
+end
+
+otf.enhancers["check italic correction"] = function(data,filename)
+ local glyphs = data.glyphs
+ for index, glyph in next, glyphs do
+ local ic = glyph.italic_correction
+ if ic then
+ if ic ~= 0 then
+ glyph.italic = ic
+ end
+ glyph.italic_correction = nil
+ end
+ end
+end
+
+otf.enhancers["check math"] = function(data,filename)
+ if data.math then
+ -- we move the math stuff into a math subtable because we then can
+ -- test faster in the tfm copy
+ local glyphs = data.glyphs
+ local unicodes = data.luatex.unicodes
+ for index, glyph in next, glyphs do
+ local mk = glyph.mathkern
+ local hv = glyph.horiz_variants
+ local vv = glyph.vert_variants
+ if mk or hv or vv then
+ local math = { }
+ glyph.math = math
+ if mk then
+ for k, v in next, mk do
+ if not next(v) then
+ mk[k] = nil
+ end
+ end
+ math.kerns = mk
+ glyph.mathkern = nil
+ end
+ if hv then
+ math.horiz_variants = hv.variants
+ local p = hv.parts
+ if p then
+ if #p>0 then
+ for i=1,#p do
+ local pi = p[i]
+ pi.glyph = unicodes[pi.component] or 0
+ end
+ math.horiz_parts = p
+ end
+ end
+ local ic = hv.italic_correction
+ if ic and ic ~= 0 then
+ math.horiz_italic_correction = ic
+ end
+ glyph.horiz_variants = nil
+ end
+ if vv then
+ local uc = unicodes[index]
+ math.vert_variants = vv.variants
+ local p = vv.parts
+ if p then
+ if #p>0 then
+ for i=1,#p do
+ local pi = p[i]
+ pi.glyph = unicodes[pi.component] or 0
+ end
+ math.vert_parts = p
+ end
+ end
+ local ic = vv.italic_correction
+ if ic and ic ~= 0 then
+ math.vert_italic_correction = ic
+ end
+ glyph.vert_variants = nil
+ end
+ local ic = glyph.italic_correction
+ if ic then
+ if ic ~= 0 then
+ math.italic_correction = ic
+ end
+ glyph.italic_correction = nil
+ end
+ end
+ end
+ end
+end
+
+otf.enhancers["share widths"] = function(data,filename)
+ local glyphs = data.glyphs
+ local widths = { }
+ for index, glyph in next, glyphs do
+ local width = glyph.width
+ widths[width] = (widths[width] or 0) + 1
+ end
+ -- share width for cjk fonts
+ local wd, most = 0, 1
+ for k,v in next, widths do
+ if v > most then
+ wd, most = k, v
+ end
+ end
+ if most > 1000 then
+ if trace_loading then
+ logs.report("load otf", "most common width: %s (%s times), sharing (cjk font)",wd,most)
+ end
+ for k, v in next, glyphs do
+ if v.width == wd then
+ v.width = nil
+ end
+ end
+ data.luatex.defaultwidth = wd
+ end
+end
+
+-- kern: ttf has a table with kerns
+
+otf.enhancers["reorganize kerns"] = function(data,filename)
+ local glyphs, mapmap, unicodes = data.glyphs, data.luatex.indices, data.luatex.unicodes
+ local mkdone = false
+ for index, glyph in next, data.glyphs do
+ if glyph.kerns then
+ local mykerns = { }
+ for k,v in next, glyph.kerns do
+ local vc, vo, vl = v.char, v.off, v.lookup
+ if vc and vo and vl then -- brrr, wrong! we miss the non unicode ones
+ local uvc = unicodes[vc]
+ if not uvc then
+ if trace_loading then
+ logs.report("load otf","problems with unicode %s of kern %s at glyph %s",vc,k,index)
+ end
+ else
+ if type(vl) ~= "table" then
+ vl = { vl }
+ end
+ for l=1,#vl do
+ local vll = vl[l]
+ local mkl = mykerns[vll]
+ if not mkl then
+ mkl = { }
+ mykerns[vll] = mkl
+ end
+ if type(uvc) == "table" then
+ for u=1,#uvc do
+ mkl[uvc[u]] = vo
+ end
+ else
+ mkl[uvc] = vo
+ end
+ end
+ end
+ end
+ end
+ glyph.mykerns = mykerns
+ glyph.kerns = nil -- saves space and time
+ mkdone = true
+ end
+ end
+ if trace_loading and mkdone then
+ logs.report("load otf", "replacing 'kerns' tables by 'mykerns' tables")
+ end
+ if data.kerns then
+ if trace_loading then
+ logs.report("load otf", "removing global 'kern' table")
+ end
+ data.kerns = nil
+ end
+ local dgpos = data.gpos
+ if dgpos then
+ for gp=1,#dgpos do
+ local gpos = dgpos[gp]
+ local subtables = gpos.subtables
+ if subtables then
+ for s=1,#subtables do
+ local subtable = subtables[s]
+ local kernclass = subtable.kernclass -- name is inconsistent with anchor_classes
+ if kernclass then
+ for k=1,#kernclass do
+ local kcl = kernclass[k]
+ local firsts, seconds, offsets, lookups = kcl.firsts, kcl.seconds, kcl.offsets, kcl.lookup -- singular
+ if type(lookups) ~= "table" then
+ lookups = { lookups }
+ end
+ for l=1,#lookups do
+ local lookup = lookups[l]
+ local maxfirsts, maxseconds = getn(firsts), getn(seconds)
+ if trace_loading then
+ logs.report("load otf", "adding kernclass %s with %s times %s pairs",lookup, maxfirsts, maxseconds)
+ end
+ for fk, fv in next, firsts do
+ for first in gmatch(fv,"[^ ]+") do
+ local first_unicode = unicodes[first]
+ if type(first_unicode) == "number" then
+ first_unicode = { first_unicode }
+ end
+ for f=1,#first_unicode do
+ local glyph = glyphs[mapmap[first_unicode[f]]]
+ if glyph then
+ local mykerns = glyph.mykerns
+ if not mykerns then
+ mykerns = { } -- unicode indexed !
+ glyph.mykerns = mykerns
+ end
+ local lookupkerns = mykerns[lookup]
+ if not lookupkerns then
+ lookupkerns = { }
+ mykerns[lookup] = lookupkerns
+ end
+ for sk, sv in next, seconds do
+ local offset = offsets[(fk-1) * maxseconds + sk]
+ --~ local offset = offsets[sk] -- (fk-1) * maxseconds + sk]
+ for second in gmatch(sv,"[^ ]+") do
+ local second_unicode = unicodes[second]
+ if type(second_unicode) == "number" then
+ lookupkerns[second_unicode] = offset
+ else
+ for s=1,#second_unicode do
+ lookupkerns[second_unicode[s]] = offset
+ end
+ end
+ end
+ end
+ elseif trace_loading then
+ logs.report("load otf", "no glyph data for U+%04X", first_unicode[f])
+ end
+ end
+ end
+ end
+ end
+ end
+ subtable.comment = "The kernclass table is merged into mykerns in the indexed glyph tables."
+ subtable.kernclass = { }
+ end
+ end
+ end
+ end
+ end
+end
+
+otf.enhancers["strip not needed data"] = function(data,filename)
+ local verbose = fonts.verbose
+ local int_to_uni = data.luatex.unicodes
+ for k, v in next, data.glyphs do
+ local d = v.dependents
+ if d then v.dependents = nil end
+ local a = v.altuni
+ if a then v.altuni = nil end
+ if verbose then
+ local code = int_to_uni[k]
+ -- looks like this is done twice ... bug?
+ if code then
+ local vu = v.unicode
+ if not vu then
+ v.unicode = code
+ elseif type(vu) == "table" then
+ if vu[#vu] == code then
+ -- weird
+ else
+ vu[#vu+1] = code
+ end
+ elseif vu ~= code then
+ v.unicode = { vu, code }
+ end
+ end
+ else
+ v.unicode = nil
+ v.index = nil
+ end
+ end
+ data.luatex.comment = "Glyph tables have their original index. When present, mykern tables are indexed by unicode."
+ data.map = nil
+ data.names = nil -- funny names for editors
+ data.glyphcnt = nil
+ data.glyphmax = nil
+ if true then
+ data.gpos = nil
+ data.gsub = nil
+ data.anchor_classes = nil
+ end
+ local global_fields = otf.tables.global_fields
+ local metadata = { }
+ for k,v in next, data do
+ if not global_fields[k] then
+ metadata[k] = v
+ data[k] = nil
+ end
+ end
+ data.metadata = metadata
+ -- goodies
+ local pfminfo = data.pfminfo
+ metadata.isfixedpitch = metadata.isfixedpitch or (pfminfo.panose and pfminfo.panose["proportion"] == "Monospaced")
+ metadata.charwidth = pfminfo and pfminfo.avgwidth
+end
+
+otf.enhancers["flatten glyph lookups"] = function(data,filename)
+ for k, v in next, data.glyphs do
+ if v.lookups then
+ for kk, vv in next, v.lookups do
+ for kkk=1,#vv do
+ local vvv = vv[kkk]
+ local s = vvv.specification
+ if s then
+ local t = vvv.type
+ if t == "ligature" then
+ vv[kkk] = { "ligature", s.components, s.char }
+ elseif t == "alternate" then
+ vv[kkk] = { "alternate", s.components }
+ elseif t == "substitution" then
+ vv[kkk] = { "substitution", s.variant }
+ elseif t == "multiple" then
+ vv[kkk] = { "multiple", s.components }
+ elseif t == "position" then
+ vv[kkk] = { "position", { s.x or 0, s.y or 0, s.h or 0, s.v or 0 } }
+ elseif t == "pair" then
+ local one, two, paired = s.offsets[1], s.offsets[2], s.paired or ""
+ if one then
+ if two then
+ vv[kkk] = { "pair", paired, { one.x or 0, one.y or 0, one.h or 0, one.v or 0 }, { two.x or 0, two.y or 0, two.h or 0, two.v or 0 } }
+ else
+ vv[kkk] = { "pair", paired, { one.x or 0, one.y or 0, one.h or 0, one.v or 0 } }
+ end
+ else
+ if two then
+ vv[kkk] = { "pair", paired, { }, { two.x or 0, two.y or 0, two.h or 0, two.v or 0} } -- maybe nil instead of { }
+ else
+ vv[kkk] = { "pair", paired }
+ end
+ end
+ else
+ if trace_loading then
+ logs.report("load otf", "flattening needed, report to context list")
+ end
+ for a, b in next, s do
+ if trace_loading and vvv[a] then
+ logs.report("load otf", "flattening conflict, report to context list")
+ end
+ vvv[a] = b
+ end
+ vvv.specification = nil
+ end
+ end
+ end
+ end
+ end
+ end
+end
+
+otf.enhancers["flatten anchor tables"] = function(data,filename)
+ for k, v in next, data.glyphs do
+ if v.anchors then
+ for kk, vv in next, v.anchors do
+ for kkk, vvv in next, vv do
+ if vvv.x or vvv.y then
+ vv[kkk] = { vvv.x or 0, vvv.y or 0 }
+ else
+ for kkkk=1,#vvv do
+ local vvvv = vvv[kkkk]
+ vvv[kkkk] = { vvvv.x or 0, vvvv.y or 0 }
+ end
+ end
+ end
+ end
+ end
+ end
+end
+
+otf.enhancers["flatten feature tables"] = function(data,filename)
+ -- is this needed? do we still use them at all?
+ for _, tag in next, { "gsub", "gpos" } do
+ if data[tag] then
+ if trace_loading then
+ logs.report("load otf", "flattening %s table", tag)
+ end
+ for k, v in next, data[tag] do
+ local features = v.features
+ if features then
+ for kk=1,#features do
+ local vv = features[kk]
+ local t = { }
+ local scripts = vv.scripts
+ for kkk=1,#scripts do
+ local vvv = scripts[kkk]
+ t[vvv.script] = vvv.langs
+ end
+ vv.scripts = t
+ end
+ end
+ end
+ end
+ end
+end
+
+otf.enhancers.patches = otf.enhancers.patches or { }
+
+otf.enhancers["patch bugs"] = function(data,filename)
+ local basename = file.basename(lower(filename))
+ for pattern, action in next, otf.enhancers.patches do
+ if find(basename,pattern) then
+ action(data,filename)
+ end
+ end
+end
+
+-- tex features
+
+fonts.otf.enhancers["enrich with features"] = function(data,filename)
+ -- later, ctx only
+end
+
+function otf.features.register(name,default)
+ otf.features.list[#otf.features.list+1] = name
+ otf.features.default[name] = default
+end
+
+function otf.set_features(tfmdata,features)
+ local processes = { }
+ if not table.is_empty(features) then
+ local lists = {
+ fonts.triggers,
+ fonts.processors,
+ fonts.manipulators,
+ }
+ local mode = tfmdata.mode or fonts.mode -- or features.mode
+ local initializers = fonts.initializers
+ local fi = initializers[mode]
+ if fi then
+ local fiotf = fi.otf
+ if fiotf then
+ local done = { }
+ for l=1,4 do
+ local list = lists[l]
+ if list then
+ for i=1,#list do
+ local f = list[i]
+ local value = features[f]
+ if value and fiotf[f] then -- brr
+ if not done[f] then -- so, we can move some to triggers
+ if trace_features then
+ logs.report("define otf","initializing feature %s to %s for mode %s for font %s",f,tostring(value),mode or 'unknown', tfmdata.fullname or 'unknown')
+ end
+ fiotf[f](tfmdata,value) -- can set mode (no need to pass otf)
+ mode = tfmdata.mode or fonts.mode -- keep this, mode can be set local !
+ local im = initializers[mode]
+ if im then
+ fiotf = initializers[mode].otf
+ end
+ done[f] = true
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+ local fm = fonts.methods[mode]
+ if fm then
+ local fmotf = fm.otf
+ if fmotf then
+ for l=1,4 do
+ local list = lists[l]
+ if list then
+ for i=1,#list do
+ local f = list[i]
+ if fmotf[f] then -- brr
+ if trace_features then
+ logs.report("define otf","installing feature handler %s for mode %s for font %s",f,mode or 'unknown', tfmdata.fullname or 'unknown')
+ end
+ processes[#processes+1] = fmotf[f]
+ end
+ end
+ end
+ end
+ end
+ else
+ -- message
+ end
+ end
+ return processes, features
+end
+
+function otf.otf_to_tfm(specification)
+ local name = specification.name
+ local sub = specification.sub
+ local filename = specification.filename
+ local format = specification.format
+ local features = specification.features.normal
+ local cache_id = specification.hash
+ local tfmdata = containers.read(tfm.cache(),cache_id)
+ if not tfmdata then
+ local otfdata = otf.load(filename,format,sub,features and features.featurefile)
+ if not table.is_empty(otfdata) then
+ otfdata.shared = otfdata.shared or {
+ featuredata = { },
+ anchorhash = { },
+ initialized = false,
+ }
+ tfmdata = otf.copy_to_tfm(otfdata)
+ if not table.is_empty(tfmdata) then
+ tfmdata.unique = tfmdata.unique or { }
+ tfmdata.shared = tfmdata.shared or { } -- combine
+ local shared = tfmdata.shared
+ shared.otfdata = otfdata
+ shared.features = features -- default
+ shared.dynamics = { }
+ shared.processes = { }
+ shared.set_dynamics = otf.set_dynamics -- fast access and makes other modules independent
+ -- this will be done later anyway, but it's convenient to have
+ -- them already for fast access
+ tfmdata.luatex = otfdata.luatex
+ tfmdata.indices = otfdata.luatex.indices
+ tfmdata.unicodes = otfdata.luatex.unicodes
+ tfmdata.marks = otfdata.luatex.marks
+ tfmdata.originals = otfdata.luatex.originals
+ tfmdata.changed = { }
+ if not tfmdata.language then tfmdata.language = 'dflt' end
+ if not tfmdata.script then tfmdata.script = 'dflt' end
+ shared.processes, shared.features = otf.set_features(tfmdata,fonts.define.check(features,otf.features.default))
+ end
+ end
+ containers.write(tfm.cache(),cache_id,tfmdata)
+ end
+ return tfmdata
+end
+
+--~ {
+--~ ['boundingbox']={ 95, -458, 733, 1449 },
+--~ ['class']="base",
+--~ ['name']="braceleft",
+--~ ['unicode']=123,
+--~ ['vert_variants']={
+--~ ['italic_correction']=0,
+--~ ['parts']={
+--~ { ['component']="uni23A9", ['endConnectorLength']=1000, ['fullAdvance']=2546, ['is_extender']=0, ['startConnectorLength']=0, }, -- bot
+--~ { ['component']="uni23AA", ['endConnectorLength']=2500, ['fullAdvance']=2501, ['is_extender']=1, ['startConnectorLength']=2500, }, -- rep
+--~ { ['component']="uni23A8", ['endConnectorLength']=1000, ['fullAdvance']=4688, ['is_extender']=0, ['startConnectorLength']=1000, }, -- mid
+--~ { ['component']="uni23AA", ['endConnectorLength']=2500, ['fullAdvance']=2501, ['is_extender']=1, ['startConnectorLength']=2500, }, -- rep
+--~ { ['component']="uni23A7", ['endConnectorLength']=0, ['fullAdvance']=2546, ['is_extender']=0, ['startConnectorLength']=1000, }, -- top
+--~ },
+--~ ['variants']="braceleft braceleft.vsize1 braceleft.vsize2 braceleft.vsize3 braceleft.vsize4 braceleft.vsize5 braceleft.vsize6 braceleft.vsize7",
+--~ },
+--~ ['width']=793,
+--~ },
+
+-- the first version made a top/mid/not extensible table, now we just pass on the variants data
+-- and deal with it in the tfm scaler (there is no longer an extensible table anyway)
+
+function otf.copy_to_tfm(data) -- we can save a copy when we reorder the tma to unicode (nasty due to one->many)
+ if data then
+ local glyphs, pfminfo, metadata = data.glyphs or { }, data.pfminfo or { }, data.metadata or { }
+ local luatex = data.luatex
+ local unicodes = luatex.unicodes -- names to unicodes
+ local indices = luatex.indices
+ local characters, parameters, math_parameters, descriptions = { }, { }, { }, { }
+ local tfm = {
+ characters = characters,
+ parameters = parameters,
+ math_parameters = math_parameters,
+ descriptions = descriptions,
+ indices = indices,
+ unicodes = unicodes,
+ }
+ -- indices maps from unicodes to indices
+ for u, i in next, indices do
+ local d = glyphs[i]
+ characters[u] = { } -- we need this because for instance we add protruding info
+ descriptions[u] = d
+ end
+ -- math
+ if metadata.math then
+ -- parameters
+ for name, value in next, metadata.math do
+ math_parameters[name] = value
+ end
+ -- we could use a subset
+ for u, char in next, characters do
+ local d = descriptions[u]
+ local m = d.math
+ -- we could prepare the variants
+ if m then
+ local variants = m.horiz_variants
+ if variants then
+ local c = char
+ for n in variants:gmatch("[^ ]+") do
+ local un = unicodes[n]
+ if un and u ~= un then
+ c.next = un
+ c = characters[un]
+ end
+ end
+ c.horiz_variants = m.horiz_parts
+ else
+ local variants = m.vert_variants
+ if variants then
+ local c = char
+ for n in variants:gmatch("[^ ]+") do
+ local un = unicodes[n]
+ if un and u ~= un then
+ c.next = un
+ c = characters[un]
+ end
+ end
+ c.vert_variants = m.vert_parts
+ end
+ end
+ end
+ end
+ end
+ -- end math
+ local designsize = metadata.designsize or metadata.design_size or 100
+ if designsize == 0 then
+ designsize = 100
+ end
+ local spaceunits = 500
+ tfm.units = metadata.units_per_em or 1000
+ -- we need a runtime lookup because of running from cdrom or zip, brrr
+ tfm.filename = input.findbinfile(luatex.filename,"") or luatex.filename
+ tfm.fullname = metadata.fontname or metadata.fullname
+ tfm.encodingbytes = 2
+ tfm.cidinfo = data.cidinfo
+ tfm.cidinfo.registry = tfm.cidinfo.registry or ""
+ tfm.type = "real"
+ tfm.stretch = 0 -- stretch
+ tfm.slant = 0 -- slant
+ tfm.direction = 0
+ tfm.boundarychar_label = 0
+ tfm.boundarychar = 65536
+ tfm.designsize = (designsize/10)*65536
+ tfm.spacer = "500 units"
+ local endash, emdash = 0x20, 0x2014 -- unicodes['space'], unicodes['emdash']
+ if metadata.isfixedpitch then
+ if descriptions[endash] then
+ spaceunits, tfm.spacer = descriptions[endash].width, "space"
+ end
+ if not spaceunits and descriptions[emdash] then
+ spaceunits, tfm.spacer = descriptions[emdash].width, "emdash"
+ end
+ if not spaceunits and metadata.charwidth then
+ spaceunits, tfm.spacer = metadata.charwidth, "charwidth"
+ end
+ else
+ if descriptions[endash] then
+ spaceunits, tfm.spacer = descriptions[endash].width, "space"
+ end
+ if not spaceunits and descriptions[emdash] then
+ spaceunits, tfm.spacer = descriptions[emdash].width/2, "emdash/2"
+ end
+ if not spaceunits and metadata.charwidth then
+ spaceunits, tfm.spacer = metadata.charwidth, "charwidth"
+ end
+ end
+ spaceunits = tonumber(spaceunits) or tfm.units/2 -- 500 -- brrr
+ parameters.slant = 0
+ parameters.space = spaceunits
+ parameters.space_stretch = tfm.units/2 -- 500
+ -- parameters.space_shrink = 2*tfm.units/3 -- 333
+ parameters.space_shrink = 1*tfm.units/3 -- 333
+ -- parameters.x_height = 4*tfm.units/5 -- 400
+ parameters.x_height = 2*tfm.units/5 -- 400
+ parameters.quad = tfm.units -- 1000
+ parameters.extra_space = 0
+ if spaceunits < 2*tfm.units/5 then
+ -- todo: warning
+ end
+ local italicangle = metadata.italicangle
+ tfm.ascender = math.abs(metadata.ascent or 0)
+ tfm.descender = math.abs(metadata.descent or 0)
+ if italicangle then -- maybe also in afm _
+ tfm.italicangle = italicangle
+ parameters.slant = parameters.slant - math.round(math.tan(italicangle*math.pi/180))
+ end
+ if metadata.isfixedpitch then
+ parameters.space_stretch = 0
+ parameters.space_shrink = 0
+ elseif otf.syncspace then --
+ parameters.space_stretch = spaceunits/2
+ parameters.space_shrink = spaceunits/3
+ end
+ if pfminfo.os2_xheight and pfminfo.os2_xheight > 0 then
+ parameters.x_height = pfminfo.os2_xheight
+ else
+ local x = 0x78 -- unicodes['x']
+ if x then
+ local x = descriptions[x]
+ if x then
+ parameters.x_height = x.height
+ end
+ end
+ end
+ -- [6]
+ return tfm
+ else
+ return nil
+ end
+end
+
+otf.features.register('mathsize')
+
+function tfm.read_from_open_type(specification)
+ local tfmtable = otf.otf_to_tfm(specification)
+ if tfmtable then
+ local otfdata = tfmtable.shared.otfdata
+ tfmtable.name = specification.name
+ tfmtable.sub = specification.sub
+ local s = specification.size
+ local m = otfdata.metadata.math
+ if m then
+ local f = specification.features
+ if f then
+ local f = f.normal
+ if f and f.mathsize then
+ local mathsize = specification.mathsize or 0
+ if mathsize == 2 then
+ local p = m.ScriptPercentScaleDown
+ if p then
+ local ps = p * specification.textsize / 100
+ if trace_math then
+ logs.report("define font","asked script size: %s, used: %s (%2.2f %%)",s,ps,(ps/s)*100)
+ end
+ s = ps
+ end
+ elseif mathsize == 3 then
+ local p = m.ScriptScriptPercentScaleDown
+ if p then
+ local ps = p * specification.textsize / 100
+ if trace_math then
+ logs.report("define font","asked scriptscript size: %s, used: %s (%2.2f %%)",s,ps,(ps/s)*100)
+ end
+ s = ps
+ end
+ end
+ end
+ end
+ end
+ tfmtable = tfm.scale(tfmtable,s)
+ -- here we resolve the name; file can be relocated, so this info is not in the cache
+ local filename = (otfdata and otfdata.luatex and otfdata.luatex.filename) or specification.filename
+ if not filename then
+ -- try to locate anyway and set otfdata.luatex.filename
+ end
+ if filename then
+ tfmtable.encodingbytes = 2
+ tfmtable.filename = input.findbinfile(filename,"") or filename
+ tfmtable.fullname = otfdata.metadata.fontname or otfdata.metadata.fullname
+ local order = otfdata and otfdata.metadata.order2
+ if order == 0 then
+ tfmtable.format = 'opentype'
+ elseif order == 1 then
+ tfmtable.format = 'truetype'
+ else
+ tfmtable.format = specification.format
+ end
+ tfmtable.name = tfmtable.filename or tfmtable.fullname
+ end
+ fonts.logger.save(tfmtable,file.extname(specification.filename),specification)
+ end
+ return tfmtable
+end
+
+local a_to_script = { } otf.a_to_script = a_to_script
+local a_to_language = { } otf.a_to_language = a_to_language
+
+otf.default_language = 'latn'
+otf.default_script = 'dflt'
+
+local context_setups = fonts.define.specify.context_setups
+local context_numbers = fonts.define.specify.context_numbers
+
+function otf.set_dynamics(font,dynamics,attribute)
+ features = context_setups[context_numbers[attribute]] -- can be moved to caller
+ if features then
+ local script = features.script or 'dflt'
+ local language = features.language or 'dflt'
+ local ds = dynamics[script]
+ if not ds then
+ ds = { }
+ dynamics[script] = ds
+ end
+ local dsl = ds[language]
+ if not dsl then
+ dsl = { }
+ ds[language] = dsl
+ end
+ local dsla = dsl[attribute]
+ if dsla then
+ -- if trace_dynamics then
+ -- logs.report("otf define","using dynamics %s: attribute %s, script %s, language %s",context_numbers[attribute],attribute,script,language)
+ -- end
+ return dsla
+ else
+ local tfmdata = fontdata[font]
+ a_to_script [attribute] = script
+ a_to_language[attribute] = language
+ -- we need to save some values
+ local saved = {
+ script = tfmdata.script,
+ language = tfmdata.language,
+ mode = tfmdata.mode,
+ features = tfmdata.shared.features
+ }
+ tfmdata.mode = "node"
+ tfmdata.language = language
+ tfmdata.script = script
+ tfmdata.shared.features = { }
+ -- end of save
+ dsla = otf.set_features(tfmdata,fonts.define.check(features,otf.features.default))
+ if trace_dynamics then
+ logs.report("otf define","setting dynamics %s: attribute %s, script %s, language %s",context_numbers[attribute],attribute,script,language)
+ end
+ -- we need to restore some values
+ tfmdata.script = saved.script
+ tfmdata.language = saved.language
+ tfmdata.mode = saved.mode
+ tfmdata.shared.features = saved.features
+ -- end of restore
+ dynamics[script][language][attribute] = dsla -- cache
+ return dsla
+ end
+ end
+ return nil -- { }
+end
+
+-- common stuff
+
+function otf.features.language(tfmdata,value)
+ if value then
+ value = lower(value)
+ if otf.tables.languages[value] then
+ tfmdata.language = value
+ end
+ end
+end
+
+function otf.features.script(tfmdata,value)
+ if value then
+ value = lower(value)
+ if otf.tables.scripts[value] then
+ tfmdata.script = value
+ end
+ end
+end
+
+function otf.features.mode(tfmdata,value)
+ if value then
+ tfmdata.mode = lower(value)
+ end
+end
+
+fonts.initializers.base.otf.language = otf.features.language
+fonts.initializers.base.otf.script = otf.features.script
+fonts.initializers.base.otf.mode = otf.features.mode
+fonts.initializers.base.otf.method = otf.features.mode
+
+fonts.initializers.node.otf.language = otf.features.language
+fonts.initializers.node.otf.script = otf.features.script
+fonts.initializers.node.otf.mode = otf.features.mode
+fonts.initializers.node.otf.method = otf.features.mode
+
+otf.features.register("features",true) -- we always do features
+table.insert(fonts.processors,"features") -- we need a proper function for doing this
+
diff --git a/otfl-font-otn.lua b/otfl-font-otn.lua
new file mode 100644
index 0000000..91deb87
--- /dev/null
+++ b/otfl-font-otn.lua
@@ -0,0 +1,2453 @@
+if not modules then modules = { } end modules ['font-otn'] = {
+ version = 1.001,
+ comment = "companion to font-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+-- this is still somewhat preliminary and it will get better in due time;
+-- much functionality could only be implemented thanks to the husayni font
+-- of Idris Samawi Hamid to who we dedicate this module.
+
+-- we can use more lpegs when lpeg is extended with function args and so
+-- resolving to unicode does not gain much
+
+-- in retrospect it always looks easy but believe it or not, it took a lot
+-- of work to get proper open type support done: buggy fonts, fuzzy specs,
+-- special made testfonts, many skype sessions between taco, idris and me,
+-- torture tests etc etc ... unfortunately the code does not show how much
+-- time it took ...
+
+-- todo:
+--
+-- kerning is probably not yet ok for latin around dics nodes
+-- extension infrastructure (for usage out of context)
+-- sorting features according to vendors/renderers
+-- alternative loop quitters
+-- check cursive and r2l
+-- find out where ignore-mark-classes went
+-- remove unused tables
+-- slide tail (always glue at the end so only needed once
+-- default features (per language, script)
+-- cleanup kern(class) code, remove double info
+-- handle positions (we need example fonts)
+-- handle gpos_single (we might want an extra width field in glyph nodes because adding kerns might interfere)
+
+--[[ldx--
+<p>This module is a bit more split up that I'd like but since we also want to test
+with plain <l n='tex'/> it has to be so. This module is part of <l n='context'/>
+and discussion about improvements and functionality mostly happens on the
+<l n='context'/> mailing list.</p>
+
+<p>The specification of OpenType is kind of vague. Apart from a lack of a proper
+free specifications there's also the problem that Microsoft and Adobe
+may have their own interpretation of how and in what order to apply features.
+In general the Microsoft website has more detailed specifications and is a
+better reference. There is also some information in the FontForge help files.</p>
+
+<p>Because there is so much possible, fonts might contain bugs and/or be made to
+work with certain rederers. These may evolve over time which may have the side
+effect that suddenly fonts behave differently.</p>
+
+<p>After a lot of experiments (mostly by Taco, me and Idris) we're now at yet another
+implementation. Of course all errors are mine and of course the code can be
+improved. There are quite some optimizations going on here and processing speed
+is currently acceptable. Not all functions are implemented yet, often because I
+lack the fonts for testing. Many scripts are not yet supported either, but I will
+look into them as soon as <l n='context'/> users ask for it.</p>
+
+<p>Because there are different interpretations possible, I will extend the code
+with more (configureable) variants. I can also add hooks for users so that they can
+write their own extensions.</p>
+
+<p>Glyphs are indexed not by unicode but in their own way. This is because there is no
+relationship with unicode at all, apart from the fact that a font might cover certain
+ranges of characters. One character can have multiple shapes. However, at the
+<l n='tex'/> end we use unicode so and all extra glyphs are mapped into a private
+space. This is needed because we need to access them and <l n='tex'/> has to include
+then in the output eventually.</p>
+
+<p>The raw table as it coms from <l n='fontforge'/> gets reorganized in to fit out needs.
+In <l n='context'/> that table is packed (similar tables are shared) and cached on disk
+so that successive runs can use the optimized table (after loading the table is
+unpacked). The flattening code used later is a prelude to an even more compact table
+format (and as such it keeps evolving).</p>
+
+<p>This module is sparsely documented because it is a moving target. The table format
+of the reader changes and we experiment a lot with different methods for supporting
+features.</p>
+
+<p>As with the <l n='afm'/> code, we may decide to store more information in the
+<l n='otf'/> table.</p>
+
+<p>Incrementing the version number will force a re-cache. We jump the number by one
+when there's a fix in the <l n='fontforge'/> library or <l n='lua'/> code that
+results in different tables.</p>
+--ldx]]--
+
+-- action handler chainproc chainmore comment
+--
+-- gsub_single ok ok ok
+-- gsub_multiple ok ok not implemented yet
+-- gsub_alternate ok ok not implemented yet
+-- gsub_ligature ok ok ok
+-- gsub_context ok --
+-- gsub_contextchain ok --
+-- gsub_reversecontextchain ok --
+-- chainsub -- ok
+-- reversesub -- ok
+-- gpos_mark2base ok ok
+-- gpos_mark2ligature ok ok
+-- gpos_mark2mark ok ok
+-- gpos_cursive ok untested
+-- gpos_single ok ok
+-- gpos_pair ok ok
+-- gpos_context ok --
+-- gpos_contextchain ok --
+--
+-- actions:
+--
+-- handler : actions triggered by lookup
+-- chainproc : actions triggered by contextual lookup
+-- chainmore : multiple substitutions triggered by contextual lookup (e.g. fij -> f + ij)
+--
+-- remark: the 'not implemented yet' variants will be done when we have fonts that use them
+-- remark: we need to check what to do with discretionaries
+
+local concat = table.concat
+local format, gmatch, gsub, find, match, lower, strip = string.format, string.gmatch, string.gsub, string.find, string.match, string.lower, string.strip
+local type, next, tonumber, tostring = type, next, tonumber, tostring
+
+local otf = fonts.otf
+local tfm = fonts.tfm
+
+local trace_lookups = false trackers.register("otf.lookups", function(v) trace_lookups = v end)
+local trace_singles = false trackers.register("otf.singles", function(v) trace_singles = v end)
+local trace_multiples = false trackers.register("otf.multiples", function(v) trace_multiples = v end)
+local trace_alternatives = false trackers.register("otf.alternatives", function(v) trace_alternatives = v end)
+local trace_ligatures = false trackers.register("otf.ligatures", function(v) trace_ligatures = v end)
+local trace_contexts = false trackers.register("otf.contexts", function(v) trace_contexts = v end)
+local trace_marks = false trackers.register("otf.marks", function(v) trace_marks = v end)
+local trace_kerns = false trackers.register("otf.kerns", function(v) trace_kerns = v end)
+local trace_cursive = false trackers.register("otf.cursive", function(v) trace_cursive = v end)
+local trace_preparing = false trackers.register("otf.preparing", function(v) trace_preparing = v end)
+local trace_bugs = false trackers.register("otf.bugs", function(v) trace_bugs = v end)
+local trace_details = false trackers.register("otf.details", function(v) trace_details = v end)
+
+trackers.register("otf.verbose_chain", function(v) otf.setcontextchain(v and "verbose") end)
+trackers.register("otf.normal_chain", function(v) otf.setcontextchain(v and "normal") end)
+
+trackers.register("otf.replacements", "otf.singles,otf.multiples,otf.alternatives,otf.ligatures")
+trackers.register("otf.positions","otf.marks,otf.kerns,otf.cursive")
+trackers.register("otf.actions","otf.replacements,otf.positions")
+trackers.register("otf.injections","nodes.injections")
+
+trackers.register("*otf.sample","otf.steps,otf.actions,otf.analyzing")
+
+local insert_node_after = node.insert_after
+local delete_node = nodes.delete
+local copy_node = node.copy
+local slide_node_list = node.slide
+local set_attribute = node.set_attribute
+local has_attribute = node.has_attribute
+
+local zwnj = 0x200C
+local zwj = 0x200D
+local wildcard = "*"
+
+local split_at_space = lpeg.Ct(lpeg.splitat(" ")) -- no trailing or multiple spaces anyway
+
+local glyph = node.id('glyph')
+local glue = node.id('glue')
+local kern = node.id('kern')
+local disc = node.id('disc')
+local whatsit = node.id('whatsit')
+
+local state = attributes.private('state')
+local markbase = attributes.private('markbase')
+local markmark = attributes.private('markmark')
+local markdone = attributes.private('markdone')
+local cursbase = attributes.private('cursbase')
+local curscurs = attributes.private('curscurs')
+local cursdone = attributes.private('cursdone')
+local kernpair = attributes.private('kernpair')
+
+local set_mark = nodes.set_mark
+local set_cursive = nodes.set_cursive
+local set_kern = nodes.set_kern
+local set_pair = nodes.set_pair
+
+local markonce = true
+local cursonce = true
+local kernonce = true
+
+local fontdata = fonts.ids
+
+otf.features.process = { }
+
+-- we share some vars here, after all, we have no nested lookups and
+-- less code
+
+local tfmdata = false
+local otfdata = false
+local characters = false
+local descriptions = false
+local marks = false
+local indices = false
+local unicodes = false
+local currentfont = false
+local lookuptable = false
+local anchorlookups = false
+local handlers = { }
+local rlmode = 0
+
+-- we cheat a bit and assume that a font,attr combination are kind of ranged
+
+local context_setups = fonts.define.specify.context_setups
+local context_numbers = fonts.define.specify.context_numbers
+
+-- we cannot optimize with "start = first_character(head)" because then we don't
+-- know which rlmode we're in which messes up cursive handling later on
+--
+-- head is always a whatsit so we can safely assume that head is not changed
+
+local special_attributes = {
+ init = 1,
+ medi = 2,
+ fina = 3,
+ isol = 4
+}
+
+-- we use this for special testing and documentation
+
+local checkstep = (nodes and nodes.tracers and nodes.tracers.steppers.check) or function() end
+local registerstep = (nodes and nodes.tracers and nodes.tracers.steppers.register) or function() end
+local registermessage = (nodes and nodes.tracers and nodes.tracers.steppers.message) or function() end
+
+local function logprocess(...)
+ logs.report("otf direct",registermessage(...))
+end
+local function logwarning(...)
+ logs.report("otf direct",...)
+end
+
+local function gref(n)
+ if type(n) == "number" then
+ local description = descriptions[n]
+ local name = description and description.name
+ if name then
+ return format("U+%04X (%s)",n,name)
+ else
+ return format("U+%04X",n)
+ end
+ elseif not n then
+ return "<error in tracing>"
+ else
+ local num, nam = { }, { }
+ for i=1,#n do
+ local ni = n[i]
+ num[#num+1] = format("U+%04X",ni)
+ local dni = descriptions[ni]
+ nam[#num] = (dni and dni.name) or "?"
+ end
+ return format("%s (%s)",concat(num," "), concat(nam," "))
+ end
+end
+
+local function cref(kind,chainname,chainlookupname,lookupname,index)
+ if index then
+ return format("feature %s, chain %s, sub %s, lookup %s, index %s",kind,chainname,chainlookupname,lookupname,index)
+ elseif lookupname then
+ return format("feature %s, chain %s, sub %s, lookup %s",kind,chainname,chainlookupname,lookupname)
+ elseif chainlookupname then
+ return format("feature %s, chain %s, sub %s",kind,chainname,chainlookupname)
+ elseif chainname then
+ return format("feature %s, chain %s",kind,chainname)
+ else
+ return format("feature %s",kind)
+ end
+end
+
+local function pref(kind,lookupname)
+ return format("feature %s, lookup %s",kind,lookupname)
+end
+
+-- we can assume that languages that use marks are not hyphenated
+-- we can also assume that at most one discretionary is present
+
+local function markstoligature(kind,lookupname,start,stop,char)
+ local n = copy_node(start)
+ local keep = start
+ local current
+ current, start = insert_node_after(start,start,n)
+ local snext = stop.next
+ current.next = snext
+ if snext then
+ snext.prev = current
+ end
+ start.prev, stop.next = nil, nil
+ current.char, current.subtype, current.components = char, 2, start
+ return keep
+end
+
+local function toligature(kind,lookupname,start,stop,char,markflag,discfound) -- brr head
+ if start ~= stop then
+ if discfound then
+ local lignode = copy_node(start)
+ lignode.font = start.font
+ lignode.char = char
+ lignode.subtype = 2
+ start = node.do_ligature_n(start, stop, lignode)
+ if start.id == disc then
+ local prev = start.prev
+ start = start.next
+ end
+ else -- start is the ligature
+ local deletemarks = markflag ~= "mark"
+ local n = copy_node(start)
+ local current
+ current, start = insert_node_after(start,start,n)
+ local snext = stop.next
+ current.next = snext
+ if snext then
+ snext.prev = current
+ end
+ start.prev, stop.next = nil, nil
+ current.char, current.subtype, current.components = char, 2, start
+ local head = current
+ if deletemarks then
+ if trace_marks then
+ while start do
+ if marks[start.char] then
+ logwarning("%s: remove mark %s",pref(kind,lookupname),gref(start.char))
+ end
+ start = start.next
+ end
+ end
+ else
+ local i = 0
+ while start do
+ if marks[start.char] then
+ set_attribute(start,markdone,i)
+ if trace_marks then
+ logwarning("%s: keep mark %s, gets index %s",pref(kind,lookupname),gref(start.char),i)
+ end
+ head, current = insert_node_after(head,current,copy_node(start))
+ else
+ i = i + 1
+ end
+ start = start.next
+ end
+ start = current.next
+ while start and start.id == glyph do
+ if marks[start.char] then
+ set_attribute(start,markdone,i)
+ if trace_marks then
+ logwarning("%s: keep mark %s, gets index %s",pref(kind,lookupname),gref(start.char),i)
+ end
+ else
+ break
+ end
+ start = start.next
+ end
+ end
+ return head
+ end
+ else
+ start.char = char
+ end
+ return start
+end
+
+function handlers.gsub_single(start,kind,lookupname,replacement)
+ if trace_singles then
+ logprocess("%s: replacing %s by single %s",pref(kind,lookupname),gref(start.char),gref(replacement))
+ end
+ start.char = replacement
+ return start, true
+end
+
+local function alternative_glyph(start,alternatives,kind,chainname,chainlookupname,lookupname) -- chainname and chainlookupname optional
+ local value, choice, n = tfmdata.shared.features[kind], nil, #alternatives
+ if value == "random" then
+ local r = math.random(1,n)
+ value, choice = format("random, choice %s",r), alternatives[r]
+ elseif value == "first" then
+ value, choice = format("first, choice %s",1), alternatives[1]
+ elseif value == "last" then
+ value, choice = format("last, choice %s",n), alternatives[n]
+ elseif type(value) ~= "number" then
+ value, choice = "default, choice 1", alternatives[1]
+ elseif value > n then
+ value, choice = format("no %s variants, taking %s",value,n), alternatives[n]
+ elseif value < 1 then
+ value, choice = format("no %s variants, taking %s",value,1), alternatives[1]
+ else
+ value, choice = format("choice %s",value), alternatives[value]
+ end
+ if not choice then
+ logwarning("%s: no variant %s for %s",cref(kind,chainname,chainlookupname,lookupname),value,gref(start.char))
+ choice, value = start.char, format("no replacement instead of %s",value)
+ end
+ return choice, value
+end
+
+function handlers.gsub_alternate(start,kind,lookupname,alternative,sequence)
+ local choice, index = alternative_glyph(start,alternative,kind,lookupname)
+ if trace_alternatives then
+ logprocess("%s: replacing %s by alternative %s (%s)",pref(kind,lookupname),gref(start.char),gref(choice),index)
+ end
+ start.char = choice
+ return start, true
+end
+
+function handlers.gsub_multiple(start,kind,lookupname,multiple)
+ if trace_multiples then
+ logprocess("%s: replacing %s by multiple %s",pref(kind,lookupname),gref(start.char),gref(multiple))
+ end
+ start.char = multiple[1]
+ if #multiple > 1 then
+ for k=2,#multiple do
+ local n = copy_node(start)
+ n.char = multiple[k]
+ local sn = start.next
+ n.next = sn
+ n.prev = start
+ if sn then
+ sn.prev = n
+ end
+ start.next = n
+ start = n
+ end
+ end
+ return start, true
+end
+
+function handlers.gsub_ligature(start,kind,lookupname,ligature,sequence) --or maybe pass lookup ref
+ local s, stop, discfound = start.next, nil, false
+ if marks[start.char] then
+ while s do
+ local id = s.id
+ if id == glyph and s.subtype<256 then
+ if s.font == currentfont then
+ local char = s.char
+ local lg = ligature[1][char]
+ if not lg then
+ break
+ else
+ stop = s
+ ligature = lg
+ s = s.next
+ end
+ else
+ break
+ end
+ else
+ break
+ end
+ end
+ if stop and ligature[2] then
+ if trace_ligatures then
+ local startchar, stopchar = start.char, stop.char
+ start = markstoligature(kind,lookupname,start,stop,ligature[2])
+ logprocess("%s: replacing %s upto %s by ligature %s",pref(kind,lookupname),gref(startchar),gref(stopchar),gref(start.char))
+ else
+ start = markstoligature(kind,lookupname,start,stop,ligature[2])
+ end
+ return start, true
+ end
+ else
+ local skipmark = sequence.flags[1]
+ while s do
+ local id = s.id
+ if id == glyph and s.subtype<256 then
+ if s.font == currentfont then
+ local char = s.char
+ if skipmark and marks[char] then
+ s = s.next
+ else
+ local lg = ligature[1][char]
+ if not lg then
+ break
+ else
+ stop = s
+ ligature = lg
+ s = s.next
+ end
+ end
+ else
+ break
+ end
+ elseif id == disc then
+ discfound = true
+ s = s.next
+ else
+ break
+ end
+ end
+ if stop and ligature[2] then
+ if trace_ligatures then
+ local startchar, stopchar = start.char, stop.char
+ start = toligature(kind,lookupname,start,stop,ligature[2],skipmark,discfound)
+ logprocess("%s: replacing %s upto %s by ligature %s",pref(kind,lookupname),gref(startchar),gref(stopchar),gref(start.char))
+ else
+ start = toligature(kind,lookupname,start,stop,ligature[2],skipmark,discfound)
+ end
+ return start, true
+ end
+ end
+ return start, false
+end
+
+--[[ldx--
+<p>We get hits on a mark, but we're not sure if the it has to be applied so
+we need to explicitly test for basechar, baselig and basemark entries.</p>
+--ldx]]--
+
+function handlers.gpos_mark2base(start,kind,lookupname,markanchors,sequence)
+ local markchar = start.char
+ if marks[markchar] then
+ local base = start.prev -- [glyph] [start=mark]
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then
+ local basechar = base.char
+ if marks[basechar] then
+ while true do
+ base = base.prev
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then
+ basechar = base.char
+ if not marks[basechar] then
+ break
+ end
+ else
+ if trace_bugs then
+ logwarning("%s: no base for mark %s",pref(kind,lookupname),gref(markchar))
+ end
+ return start, false
+ end
+ end
+ end
+ local baseanchors = descriptions[basechar]
+ if baseanchors then
+ baseanchors = baseanchors.anchors
+ end
+ if baseanchors then
+ local baseanchors = baseanchors['basechar']
+ if baseanchors then
+ local al = anchorlookups[lookupname]
+ for anchor,ba in next, baseanchors do
+ if al[anchor] then
+ local ma = markanchors[anchor]
+ if ma then
+ local dx, dy, bound = set_mark(start,base,tfmdata.factor,rlmode,ba,ma)
+ if trace_marks then
+ logprocess("%s, anchor %s, bound %s: anchoring mark %s to basechar %s => (%s,%s)",
+ pref(kind,lookupname),anchor,bound,gref(markchar),gref(basechar),dx,dy)
+ end
+ return start, true
+ end
+ end
+ end
+ if trace_bugs then
+ logwarning("%s, no matching anchors for mark %s and base %s",pref(kind,lookupname),gref(markchar),gref(basechar))
+ end
+ end
+ else -- if trace_bugs then
+ -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(basechar))
+ fonts.register_missing(currentfont,basechar)
+ end
+ elseif trace_bugs then
+ logwarning("%s: prev node is no char",pref(kind,lookupname))
+ end
+ elseif trace_bugs then
+ logwarning("%s: mark %s is no mark",pref(kind,lookupname),gref(markchar))
+ end
+ return start, false
+end
+
+function handlers.gpos_mark2ligature(start,kind,lookupname,markanchors,sequence)
+ -- check chainpos variant
+ local markchar = start.char
+ if marks[markchar] then
+ local base = start.prev -- [glyph] [optional marks] [start=mark]
+ local index = 1
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then
+ local basechar = base.char
+ if marks[basechar] then
+ index = index + 1
+ while true do
+ base = base.prev
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then
+ basechar = base.char
+ if marks[basechar] then
+ index = index + 1
+ else
+ break
+ end
+ else
+ if trace_bugs then
+ logwarning("%s: no base for mark %s",pref(kind,lookupname),gref(markchar))
+ end
+ return start, false
+ end
+ end
+ end
+ local i = has_attribute(start,markdone)
+ if i then index = i end
+ local baseanchors = descriptions[basechar]
+ if baseanchors then
+ baseanchors = baseanchors.anchors
+ if baseanchors then
+ local baseanchors = baseanchors['baselig']
+ if baseanchors then
+ local al = anchorlookups[lookupname]
+ for anchor,ba in next, baseanchors do
+ if al[anchor] then
+ local ma = markanchors[anchor]
+ if ma then
+ ba = ba[index]
+ if ba then
+ local dx, dy, bound = set_mark(start,base,tfmdata.factor,rlmode,ba,ma,index)
+ if trace_marks then
+ logprocess("%s, anchor %s, index %s, bound %s: anchoring mark %s to baselig %s at index %s => (%s,%s)",
+ pref(kind,lookupname),anchor,index,bound,gref(markchar),gref(basechar),index,dx,dy)
+ end
+ return start, true
+ end
+ end
+ end
+ end
+ if trace_bugs then
+ logwarning("%s: no matching anchors for mark %s and baselig %s",pref(kind,lookupname),gref(markchar),gref(basechar))
+ end
+ end
+ end
+ else -- if trace_bugs then
+ -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(basechar))
+ fonts.register_missing(currentfont,basechar)
+ end
+ elseif trace_bugs then
+ logwarning("%s: prev node is no char",pref(kind,lookupname))
+ end
+ elseif trace_bugs then
+ logwarning("%s: mark %s is no mark",pref(kind,lookupname),gref(markchar))
+ end
+ return start, false
+end
+
+function handlers.gpos_mark2mark(start,kind,lookupname,markanchors,sequence)
+ local markchar = start.char
+ if marks[markchar] then
+ local alreadydone = markonce and has_attribute(start,markmark)
+ if not alreadydone then
+ local base = start.prev -- [glyph] [basemark] [start=mark]
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then -- subtype test can go
+ local basechar = base.char
+ local baseanchors = descriptions[basechar]
+ if baseanchors then
+ baseanchors = baseanchors.anchors
+ if baseanchors then
+ baseanchors = baseanchors['basemark']
+ if baseanchors then
+ local al = anchorlookups[lookupname]
+ for anchor,ba in next, baseanchors do
+ if al[anchor] then
+ local ma = markanchors[anchor]
+ if ma then
+ local dx, dy, bound = set_mark(start,base,tfmdata.factor,rlmode,ba,ma)
+ if trace_marks then
+ logprocess("%s, anchor %s, bound %s: anchoring mark %s to basemark %s => (%s,%s)",
+ pref(kind,lookupname),anchor,bound,gref(markchar),gref(basechar),dx,dy)
+ end
+ return start,true
+ end
+ end
+ end
+ if trace_bugs then
+ logwarning("%s: no matching anchors for mark %s and basemark %s",pref(kind,lookupname),gref(markchar),gref(basechar))
+ end
+ end
+ end
+ else -- if trace_bugs then
+ -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(basechar))
+ fonts.register_missing(currentfont,basechar)
+ end
+ elseif trace_bugs then
+ logwarning("%s: prev node is no mark",pref(kind,lookupname))
+ end
+ elseif trace_marks and trace_details then
+ logprocess("%s, mark %s is already bound (n=%s), ignoring mark2mark",pref(kind,lookupname),gref(markchar),alreadydone)
+ end
+ elseif trace_bugs then
+ logwarning("%s: mark %s is no mark",pref(kind,lookupname),gref(markchar))
+ end
+ return start,false
+end
+
+function handlers.gpos_cursive(start,kind,lookupname,exitanchors,sequence) -- to be checked
+ local alreadydone = cursonce and has_attribute(start,cursbase)
+ if not alreadydone then
+ local done = false
+ local startchar = start.char
+ if marks[startchar] then
+ if trace_cursive then
+ logprocess("%s: ignoring cursive for mark %s",pref(kind,lookupname),gref(startchar))
+ end
+ else
+ local nxt = start.next
+ while not done and nxt and nxt.id == glyph and nxt.subtype<256 and nxt.font == currentfont do
+ local nextchar = nxt.char
+ if marks[nextchar] then
+ -- should not happen (maybe warning)
+ nxt = nxt.next
+ else
+ local entryanchors = descriptions[nextchar]
+ if entryanchors then
+ entryanchors = entryanchors.anchors
+ if entryanchors then
+ entryanchors = entryanchors['centry']
+ if entryanchors then
+ local al = anchorlookups[lookupname]
+ for anchor, entry in next, entryanchors do
+ if al[anchor] then
+ local exit = exitanchors[anchor]
+ if exit then
+ local dx, dy, bound = set_cursive(start,nxt,tfmdata.factor,rlmode,exit,entry,characters[startchar],characters[nextchar])
+ if trace_cursive then
+ logprocess("%s: moving %s to %s cursive (%s,%s) using anchor %s and bound %s",pref(kind,lookupname),gref(startchar),gref(nextchar),dx,dy,anchor,bound)
+ end
+ done = true
+ break
+ end
+ end
+ end
+ end
+ end
+ else -- if trace_bugs then
+ -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(startchar))
+ fonts.register_missing(currentfont,startchar)
+ end
+ break
+ end
+ end
+ end
+ return start, done
+ else
+ if trace_cursive and trace_details then
+ logprocess("%s, cursive %s is already done",pref(kind,lookupname),gref(start.char),alreadydone)
+ end
+ return start, false
+ end
+end
+
+function handlers.gpos_single(start,kind,lookupname,kerns,sequence)
+ local startchar = start.char
+ local dx, dy = set_pair(start,tfmdata.factor,rlmode,kerns,characters[startchar])
+ if trace_kerns then
+ logprocess("%s: shifting single %s by (%s,%s)",pref(kind,lookupname),gref(startchar),dx,dy)
+ end
+ return start, false
+end
+
+function handlers.gpos_pair(start,kind,lookupname,kerns,sequence)
+ -- todo: kerns in disc nodes: pre, post, replace -> loop over disc too
+ -- todo: kerns in components of ligatures
+--~ local alreadydone = cursonce and has_attribute(start,curscurs)
+local alreadydone = false
+if not alreadydone then
+ local snext = start.next
+ if not snext then
+ return start, false
+ else
+ local prev, done = start, false
+ local factor = tfmdata.factor
+ while snext and snext.id == glyph and snext.subtype<256 and snext.font == currentfont do
+ local nextchar = snext.char
+ if marks[nextchar] then
+ prev = snext
+ snext = snext.next
+ else
+ local krn = kerns[nextchar]
+ if not krn then
+ -- skip
+ elseif type(krn) == "table" then
+ if krn[1] == "pair" then
+ local a, b = krn[3], krn[4]
+ if a and #a > 0 then
+ local startchar = start.char
+ local x, y, w, h = set_pair(start,factor,rlmode,a,characters[startchar])
+ if trace_kerns then
+ logprocess("%s: shifting first of pair %s and %s by (%s,%s) and correction (%s,%s)",pref(kind,lookupname),gref(startchar),gref(nextchar),x,y,w,h)
+ end
+ end
+ if b and #b > 0 then
+ local startchar = start.char
+ local x, y, w, h = set_pair(snext,factor,rlmode,b,characters[nextchar])
+ if trace_kerns then
+ logprocess("%s: shifting second of pair %s and %s by (%s,%s) and correction (%s,%s)",pref(kind,lookupname),gref(startchar),gref(nextchar),x,y,w,h)
+ end
+ end
+ else
+ logs.report("%s: check this out (old kern stuff)",pref(kind,lookupname))
+ local a, b = krn[3], krn[7]
+ if a and a ~= 0 then
+ local k = set_kern(snext,factor,rlmode,a)
+ if trace_kerns then
+ logprocess("%s: inserting first kern %s between %s and %s",pref(kind,lookupname),k,gref(prev.char),gref(nextchar))
+ end
+ end
+ if b and b ~= 0 then
+ logwarning("%s: ignoring second kern xoff %s",pref(kind,lookupname),b*factor)
+ end
+ end
+ done = true
+ elseif krn ~= 0 then
+ local k = set_kern(snext,factor,rlmode,krn)
+ if trace_kerns then
+ logprocess("%s: inserting kern %s between %s and %s",pref(kind,lookupname),k,gref(prev.char),gref(nextchar))
+ end
+ done = true
+ end
+ break
+ end
+ end
+ return start, done
+ end
+else
+return start, false
+end
+end
+
+--[[ldx--
+<p>I will implement multiple chain replacements once I run into a font that uses
+it. It's not that complex to handle.</p>
+--ldx]]--
+
+local chainmores = { }
+local chainprocs = { }
+
+local function logprocess(...)
+ logs.report("otf subchain",registermessage(...))
+end
+local function logwarning(...)
+ logs.report("otf subchain",...)
+end
+
+-- ['coverage']={
+-- ['after']={ "r" },
+-- ['before']={ "q" },
+-- ['current']={ "a", "b", "c" },
+-- },
+-- ['lookups']={ "ls_l_1", "ls_l_1", "ls_l_1" },
+
+function chainmores.chainsub(start,stop,kind,chainname,currentcontext,cache,lookuplist,chainlookupname,n)
+ logprocess("%s: a direct call to chainsub cannot happen",cref(kind,chainname,chainlookupname))
+ return start, false
+end
+
+-- handled later:
+--
+-- function chainmores.gsub_single(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname,n)
+-- return chainprocs.gsub_single(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname,n)
+-- end
+
+function chainmores.gsub_multiple(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname,n)
+ logprocess("%s: gsub_multiple not yet supported",cref(kind,chainname,chainlookupname))
+ return start, false
+end
+function chainmores.gsub_alternate(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname,n)
+ logprocess("%s: gsub_alternate not yet supported",cref(kind,chainname,chainlookupname))
+ return start, false
+end
+
+-- handled later:
+--
+-- function chainmores.gsub_ligature(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname,n)
+-- return chainprocs.gsub_ligature(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname,n)
+-- end
+
+local function logprocess(...)
+ logs.report("otf chain",registermessage(...))
+end
+local function logwarning(...)
+ logs.report("otf chain",...)
+end
+
+-- We could share functions but that would lead to extra function calls with many
+-- arguments, redundant tests and confusing messages.
+
+function chainprocs.chainsub(start,stop,kind,chainname,currentcontext,cache,lookuplist,chainlookupname)
+ logwarning("%s: a direct call to chainsub cannot happen",cref(kind,chainname,chainlookupname))
+ return start, false
+end
+
+-- The reversesub is a special case, which is why we need to store the replacements
+-- in a bit weird way. There is no lookup and the replacement comes from the lookup
+-- itself. It is meant mostly for dealing with Urdu.
+
+function chainprocs.reversesub(start,stop,kind,chainname,currentcontext,cache,replacements)
+ local char = start.char
+ local replacement = replacements[char]
+ if replacement then
+ if trace_singles then
+ logprocess("%s: single reverse replacement of %s by %s",cref(kind,chainname),gref(char),gref(replacement))
+ end
+ start.char = replacement
+ return start, true
+ else
+ return start, false
+ end
+end
+
+--[[ldx--
+<p>This chain stuff is somewhat tricky since we can have a sequence of actions to be
+applied: single, alternate, multiple or ligature where ligature can be an invalid
+one in the sense that it will replace multiple by one but not neccessary one that
+looks like the combination (i.e. it is the counterpart of multiple then). For
+example, the following is valid:</p>
+
+<typing>
+<line>xxxabcdexxx [single a->A][multiple b->BCD][ligature cde->E] xxxABCDExxx</line>
+</typing>
+
+<p>Therefore we we don't really do the replacement here already unless we have the
+single lookup case. The efficiency of the replacements can be improved by deleting
+as less as needed but that would also mke the code even more messy.</p>
+--ldx]]--
+
+local function delete_till_stop(start,stop,ignoremarks)
+ if start ~= stop then
+ -- todo keep marks
+ local done = false
+ while not done do
+ done = start == stop
+ delete_node(start,start.next)
+ end
+ end
+end
+
+--[[ldx--
+<p>Here we replace start by a single variant, First we delete the rest of the
+match.</p>
+--ldx]]--
+
+function chainprocs.gsub_single(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname,chainindex)
+ -- todo: marks ?
+ if not chainindex then
+ delete_till_stop(start,stop) -- ,currentlookup.flags[1])
+ end
+ local current = start
+ local subtables = currentlookup.subtables
+ while current do
+ if current.id == glyph then
+ local currentchar = current.char
+ local lookupname = subtables[1]
+ local replacement = cache.gsub_single[lookupname]
+ if not replacement then
+ if trace_bugs then
+ logwarning("%s: no single hits",cref(kind,chainname,chainlookupname,lookupname,chainindex))
+ end
+ else
+ replacement = replacement[currentchar]
+ if not replacement then
+ if trace_bugs then
+ logwarning("%s: no single for %s",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(currentchar))
+ end
+ else
+ if trace_singles then
+ logprocess("%s: replacing single %s by %s",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(currentchar),gref(replacement))
+ end
+ current.char = replacement
+ end
+ end
+ return start, true
+ elseif current == stop then
+ break
+ else
+ current = current.next
+ end
+ end
+ return start, false
+end
+
+chainmores.gsub_single = chainprocs.gsub_single
+
+--[[ldx--
+<p>Here we replace start by a sequence of new glyphs. First we delete the rest of
+the match.</p>
+--ldx]]--
+
+function chainprocs.gsub_multiple(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname)
+ delete_till_stop(start,stop)
+ local startchar = start.char
+ local subtables = currentlookup.subtables
+ local lookupname = subtables[1]
+ local replacements = cache.gsub_multiple[lookupname]
+ if not replacements then
+ if trace_bugs then
+ logwarning("%s: no multiple hits",cref(kind,chainname,chainlookupname,lookupname))
+ end
+ else
+ replacements = replacements[startchar]
+ if not replacements then
+ if trace_bugs then
+ logwarning("%s: no multiple for %s",cref(kind,chainname,chainlookupname,lookupname),gref(startchar))
+ end
+ else
+ if trace_multiples then
+ logprocess("%s: replacing %s by multiple characters %s",cref(kind,chainname,chainlookupname,lookupname),gref(startchar),gref(replacements))
+ end
+ local sn = start.next
+ for k=1,#replacements do
+ if k == 1 then
+ start.char = replacements[k]
+ else
+ local n = copy_node(start) -- maybe delete the components and such
+ n.char = replacements[k]
+ n.next, n.prev = sn, start
+ if sn then
+ sn.prev = n
+ end
+ start.next, start = n, n
+ end
+ end
+ return start, true
+ end
+ end
+ return start, false
+end
+
+--[[ldx--
+<p>Here we replace start by new glyph. First we delete the rest of the match.</p>
+--ldx]]--
+
+function chainprocs.gsub_alternate(start,stop,kind,lookupname,currentcontext,cache,currentlookup)
+ -- todo: marks ?
+ delete_till_stop(start,stop)
+ local current = start
+ local subtables = currentlookup.subtables
+ while current do
+ if current.id == glyph then
+ local currentchar = current.char
+ local lookupname = subtables[1]
+ local alternatives = cache.gsub_alternate[lookupname]
+ if not alternatives then
+ if trace_bugs then
+ logwarning("%s: no alternative hits",cref(kind,chainname,chainlookupname,lookupname))
+ end
+ else
+ alternatives = alternatives[currentchar]
+ if not alternatives then
+ if trace_bugs then
+ logwarning("%s: no alternative for %s",cref(kind,chainname,chainlookupname,lookupname),gref(currentchar))
+ end
+ else
+ local choice, index = alternative_glyph(current,alternatives,kind,chainname,chainlookupname,lookupname)
+ current.char = choice
+ if trace_alternatives then
+ logprocess("%s: replacing single %s by alternative %s (%s)",cref(kind,chainname,chainlookupname,lookupname),index,gref(currentchar),gref(choice),index)
+ end
+ end
+ end
+ return start, true
+ elseif current == stop then
+ break
+ else
+ current = current.next
+ end
+ end
+ return start, false
+end
+
+--[[ldx--
+<p>When we replace ligatures we use a helper that handles the marks. I might change
+this function (move code inline and handle the marks by a separate function). We
+assume rather stupid ligatures (no complex disc nodes).</p>
+--ldx]]--
+
+function chainprocs.gsub_ligature(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname,chainindex)
+ local startchar = start.char
+ local subtables = currentlookup.subtables
+ local lookupname = subtables[1]
+ local ligatures = cache.gsub_ligature[lookupname]
+ if not ligatures then
+ if trace_bugs then
+ logwarning("%s: no ligature hits",cref(kind,chainname,chainlookupname,lookupname,chainindex))
+ end
+ else
+ ligatures = ligatures[startchar]
+ if not ligatures then
+ if trace_bugs then
+ logwarning("%s: no ligatures starting with %s",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar))
+ end
+ else
+ local s, discfound, last, nofreplacements = start.next, false, stop, 0
+ while s do
+ local id = s.id
+ if id == disc then
+ s = s.next
+ discfound = true
+ else
+ local schar = s.char
+ if marks[schar] then -- marks
+ s = s.next
+ else
+ local lg = ligatures[1][schar]
+ if not lg then
+ break
+ else
+ ligatures, last, nofreplacements = lg, s, nofreplacements + 1
+ if s == stop then
+ break
+ else
+ s = s.next
+ end
+ end
+ end
+ end
+ end
+ local l2 = ligatures[2]
+ if l2 then
+ if chainindex then
+ stop = last
+ end
+ if trace_ligatures then
+ if start == stop then
+ logprocess("%s: replacing character %s by ligature %s",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar),gref(l2))
+ else
+ logprocess("%s: replacing character %s upto %s by ligature %s",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar),gref(stop.char),gref(l2))
+ end
+ end
+ start = toligature(kind,lookup,start,stop,l2,currentlookup.flags[1],discfound)
+ return start, true, nofreplacements
+ elseif trace_bugs then
+ if start == stop then
+ logwarning("%s: replacing character %s by ligature fails",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar))
+ else
+ logwarning("%s: replacing character %s upto %s by ligature fails",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar),gref(stop.char))
+ end
+ end
+ end
+ end
+ return start, false, 0
+end
+
+chainmores.gsub_ligature = chainprocs.gsub_ligature
+
+function chainprocs.gpos_mark2base(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname)
+ local markchar = start.char
+ if marks[markchar] then
+ local subtables = currentlookup.subtables
+ local lookupname = subtables[1]
+ local markanchors = cache.gpos_mark2base[lookupname]
+ if markanchors then
+ markanchors = markanchors[markchar]
+ end
+ if markanchors then
+ local base = start.prev -- [glyph] [start=mark]
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then
+ local basechar = base.char
+ if marks[basechar] then
+ while true do
+ base = base.prev
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then
+ basechar = base.char
+ if not marks[basechar] then
+ break
+ end
+ else
+ if trace_bugs then
+ logwarning("%s: no base for mark %s",pref(kind,lookupname),gref(markchar))
+ end
+ return start, false
+ end
+ end
+ end
+ local baseanchors = descriptions[basechar].anchors
+ if baseanchors then
+ local baseanchors = baseanchors['basechar']
+ if baseanchors then
+ local al = anchorlookups[lookupname]
+ for anchor,ba in next, baseanchors do
+ if al[anchor] then
+ local ma = markanchors[anchor]
+ if ma then
+ local dx, dy, bound = set_mark(start,base,tfmdata.factor,rlmode,ba,ma)
+ if trace_marks then
+ logprocess("%s, anchor %s, bound %s: anchoring mark %s to basechar %s => (%s,%s)",
+ cref(kind,chainname,chainlookupname,lookupname),anchor,bound,gref(markchar),gref(basechar),dx,dy)
+ end
+ return start, true
+ end
+ end
+ end
+ if trace_bugs then
+ logwarning("%s, no matching anchors for mark %s and base %s",cref(kind,chainname,chainlookupname,lookupname),gref(markchar),gref(basechar))
+ end
+ end
+ end
+ elseif trace_bugs then
+ logwarning("%s: prev node is no char",cref(kind,chainname,chainlookupname,lookupname))
+ end
+ elseif trace_bugs then
+ logwarning("%s: mark %s has no anchors",cref(kind,chainname,chainlookupname,lookupname),gref(markchar))
+ end
+ elseif trace_bugs then
+ logwarning("%s: mark %s is no mark",cref(kind,chainname,chainlookupname),gref(markchar))
+ end
+ return start, false
+end
+
+function chainprocs.gpos_mark2ligature(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname)
+ local markchar = start.char
+ if marks[markchar] then
+ local subtables = currentlookup.subtables
+ local lookupname = subtables[1]
+ local markanchors = cache.gpos_mark2ligature[lookupname]
+ if markanchors then
+ markanchors = markanchors[markchar]
+ end
+ if markanchors then
+ local base = start.prev -- [glyph] [optional marks] [start=mark]
+ local index = 1
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then
+ local basechar = base.char
+ if marks[basechar] then
+ index = index + 1
+ while true do
+ base = base.prev
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then
+ basechar = base.char
+ if marks[basechar] then
+ index = index + 1
+ else
+ break
+ end
+ else
+ if trace_bugs then
+ logwarning("%s: no base for mark %s",cref(kind,chainname,chainlookupname,lookupname),markchar)
+ end
+ return start, false
+ end
+ end
+ end
+ -- todo: like marks a ligatures hash
+ local i = has_attribute(start,markdone)
+ if i then index = i end
+ local baseanchors = descriptions[basechar].anchors
+ if baseanchors then
+ local baseanchors = baseanchors['baselig']
+ if baseanchors then
+ local al = anchorlookups[lookupname]
+ for anchor,ba in next, baseanchors do
+ if al[anchor] then
+ local ma = markanchors[anchor]
+ if ma then
+ ba = ba[index]
+ if ba then
+ local dx, dy, bound = set_mark(start,base,tfmdata.factor,rlmode,ba,ma,index)
+ if trace_marks then
+ logprocess("%s, anchor %s, bound %s: anchoring mark %s to baselig %s at index %s => (%s,%s)",
+ cref(kind,chainname,chainlookupname,lookupname),anchor,a or bound,gref(markchar),gref(basechar),index,dx,dy)
+ end
+ return start, true
+ end
+ end
+ end
+ end
+ if trace_bugs then
+ logwarning("%s: no matching anchors for mark %s and baselig %s",cref(kind,chainname,chainlookupname,lookupname),gref(markchar),gref(basechar))
+ end
+ end
+ end
+ elseif trace_bugs then
+ logwarning("feature %s, lookup %s: prev node is no char",kind,lookupname)
+ end
+ elseif trace_bugs then
+ logwarning("%s: mark %s has no anchors",cref(kind,chainname,chainlookupname,lookupname),gref(markchar))
+ end
+ elseif trace_bugs then
+ logwarning("%s: mark %s is no mark",cref(kind,chainname,chainlookupname),gref(markchar))
+ end
+ return start, false
+end
+
+function chainprocs.gpos_mark2mark(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname)
+ local markchar = start.char
+ if marks[markchar] then
+ local alreadydone = markonce and has_attribute(start,markmark)
+ if not alreadydone then
+ -- local markanchors = descriptions[markchar].anchors markanchors = markanchors and markanchors.mark
+ local subtables = currentlookup.subtables
+ local lookupname = subtables[1]
+ local markanchors = cache.gpos_mark2mark[lookupname]
+ if markanchors then
+ markanchors = markanchors[markchar]
+ end
+ if markanchors then
+ local base = start.prev -- [glyph] [basemark] [start=mark]
+ if base and base.id == glyph and base.subtype<256 and base.font == currentfont then -- subtype test can go
+ local basechar = base.char
+ local baseanchors = descriptions[basechar].anchors
+ if baseanchors then
+ baseanchors = baseanchors['basemark']
+ if baseanchors then
+ local al = anchorlookups[lookupname]
+ for anchor,ba in next, baseanchors do
+ if al[anchor] then
+ local ma = markanchors[anchor]
+ if ma then
+ local dx, dy, bound = set_mark(start,base,tfmdata.factor,rlmode,ba,ma)
+ if trace_marks then
+ logprocess("%s, anchor %s, bound %s: anchoring mark %s to basemark %s => (%s,%s)",
+ cref(kind,chainname,chainlookupname,lookupname),anchor,bound,gref(markchar),gref(basechar),dx,dy)
+ end
+ return start, true
+ end
+ end
+ end
+ if trace_bugs then
+ logwarning("%s: no matching anchors for mark %s and basemark %s",gref(kind,chainname,chainlookupname,lookupname),gref(markchar),gref(basechar))
+ end
+ end
+ end
+ elseif trace_bugs then
+ logwarning("%s: prev node is no mark",cref(kind,chainname,chainlookupname,lookupname))
+ end
+ elseif trace_bugs then
+ logwarning("%s: mark %s has no anchors",cref(kind,chainname,chainlookupname,lookupname),gref(markchar))
+ end
+ elseif trace_marks and trace_details then
+ logprocess("%s, mark %s is already bound (n=%s), ignoring mark2mark",pref(kind,lookupname),gref(markchar),alreadydone)
+ end
+ elseif trace_bugs then
+ logwarning("%s: mark %s is no mark",cref(kind,chainname,chainlookupname),gref(markchar))
+ end
+ return start, false
+end
+
+-- ! ! ! untested ! ! !
+
+function chainprocs.gpos_cursive(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname)
+ local alreadydone = cursonce and has_attribute(start,cursbase)
+ if not alreadydone then
+ local startchar = start.char
+ local subtables = currentlookup.subtables
+ local lookupname = subtables[1]
+ local exitanchors = cache.gpos_cursive[lookupname]
+ if exitanchors then
+ exitanchors = exitanchors[startchar]
+ end
+ if exitanchors then
+ local done = false
+ if marks[startchar] then
+ if trace_cursive then
+ logprocess("%s: ignoring cursive for mark %s",pref(kind,lookupname),gref(startchar))
+ end
+ else
+ local nxt = start.next
+ while not done and nxt and nxt.id == glyph and nxt.subtype<256 and nxt.font == currentfont do
+ local nextchar = nxt.char
+ if marks[nextchar] then
+ -- should not happen (maybe warning)
+ nxt = nxt.next
+ else
+ local entryanchors = descriptions[nextchar]
+ if entryanchors then
+ entryanchors = entryanchors.anchors
+ if entryanchors then
+ entryanchors = entryanchors['centry']
+ if entryanchors then
+ local al = anchorlookups[lookupname]
+ for anchor, entry in next, entryanchors do
+ if al[anchor] then
+ local exit = exitanchors[anchor]
+ if exit then
+ local dx, dy, bound = set_cursive(start,nxt,tfmdata.factor,rlmode,exit,entry,characters[startchar],characters[nextchar])
+ if trace_cursive then
+ logprocess("%s: moving %s to %s cursive (%s,%s) using anchor %s and bound %s",pref(kind,lookupname),gref(startchar),gref(nextchar),dx,dy,anchor,bound)
+ end
+ done = true
+ break
+ end
+ end
+ end
+ end
+ end
+ else -- if trace_bugs then
+ -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(startchar))
+ fonts.register_missing(currentfont,startchar)
+ end
+ break
+ end
+ end
+ end
+ return start, done
+ else
+ if trace_cursive and trace_details then
+ logprocess("%s, cursive %s is already done",pref(kind,lookupname),gref(start.char),alreadydone)
+ end
+ return start, false
+ end
+ end
+ return start, false
+end
+
+function chainprocs.gpos_single(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname)
+ -- untested
+ local startchar = start.char
+ local subtables = currentlookup.subtables
+ local lookupname = subtables[1]
+ local kerns = cache.gpos_single[lookupname]
+ if kerns then
+ kerns = kerns[startchar]
+ if kerns then
+ local dx, dy = set_pair(start,tfmdata.factor,rlmode,kerns,characters[startchar])
+ if trace_kerns then
+ logprocess("%s: shifting single %s by (%s,%s)",cref(kind,chainname,chainlookupname),gref(startchar),dx,dy)
+ end
+ end
+ end
+ return start, false
+end
+
+-- when machines become faster i will make a shared function
+
+function chainprocs.gpos_pair(start,stop,kind,chainname,currentcontext,cache,currentlookup,chainlookupname)
+-- logwarning("%s: gpos_pair not yet supported",cref(kind,chainname,chainlookupname))
+ local snext = start.next
+ if snext then
+ local startchar = start.char
+ local subtables = currentlookup.subtables
+ local lookupname = subtables[1]
+ local kerns = cache.gpos_pair[lookupname]
+ if kerns then
+ kerns = kerns[startchar]
+ if kerns then
+ local prev, done = start, false
+ local factor = tfmdata.factor
+ while snext and snext.id == glyph and snext.subtype<256 and snext.font == currentfont do
+ local nextchar = snext.char
+ if marks[nextchar] then
+ prev = snext
+ snext = snext.next
+ else
+ local krn = kerns[nextchar]
+ if not krn then
+ -- skip
+ elseif type(krn) == "table" then
+ if krn[1] == "pair" then
+ local a, b = krn[3], krn[4]
+ if a and #a > 0 then
+ local startchar = start.char
+ local x, y, w, h = set_pair(start,factor,rlmode,a,characters[startchar])
+ if trace_kerns then
+ logprocess("%s: shifting first of pair %s and %s by (%s,%s) and correction (%s,%s)",cref(kind,chainname,chainlookupname),gref(startchar),gref(nextchar),x,y,w,h)
+ end
+ end
+ if b and #b > 0 then
+ local startchar = start.char
+ local x, y, w, h = set_pair(snext,factor,rlmode,b,characters[nextchar])
+ if trace_kerns then
+ logprocess("%s: shifting second of pair %s and %s by (%s,%s) and correction (%s,%s)",cref(kind,chainname,chainlookupname),gref(startchar),gref(nextchar),x,y,w,h)
+ end
+ end
+ else
+ logs.report("%s: check this out (old kern stuff)",cref(kind,chainname,chainlookupname))
+ local a, b = krn[3], krn[7]
+ if a and a ~= 0 then
+ local k = set_kern(snext,factor,rlmode,a)
+ if trace_kerns then
+ logprocess("%s: inserting first kern %s between %s and %s",cref(kind,chainname,chainlookupname),k,gref(prev.char),gref(nextchar))
+ end
+ end
+ if b and b ~= 0 then
+ logwarning("%s: ignoring second kern xoff %s",cref(kind,chainname,chainlookupname),b*factor)
+ end
+ end
+ done = true
+ elseif krn ~= 0 then
+ local k = set_kern(snext,factor,rlmode,krn)
+ if trace_kerns then
+ logprocess("%s: inserting kern %s between %s and %s",cref(kind,chainname,chainlookupname),k,gref(prev.char),gref(nextchar))
+ end
+ done = true
+ end
+ break
+ end
+ end
+ return start, done
+ end
+ end
+ end
+ return start, false
+end
+
+-- what pointer to return, spec says stop
+-- to be discussed ... is bidi changer a space?
+-- elseif char == zwnj and sequence[n][32] then -- brrr
+
+-- somehow l or f is global
+-- we don't need to pass the currentcontext, saves a bit
+-- make a slow variant then can be activated but with more tracing
+
+local function normal_handle_contextchain(start,kind,chainname,contexts,sequence,cache)
+ -- local rule, lookuptype, sequence, f, l, lookups = ck[1], ck[2] ,ck[3], ck[4], ck[5], ck[6]
+ local flags, done = sequence.flags, false
+ local skipmark, skipligature, skipbase = flags[1], flags[2], flags[3]
+ local someskip = skipmark or skipligature or skipbase -- could be stored in flags for a fast test (hm, flags could be false !)
+ for k=1,#contexts do
+ local match, current, last = true, start, start
+ local ck = contexts[k]
+ local sequence = ck[3]
+ local s = #sequence
+ if s == 1 then
+ -- never happens
+ match = current.id == glyph and current.subtype<256 and current.font == currentfont and sequence[1][current.char]
+ else
+ -- todo: better space check (maybe check for glue)
+ local f, l = ck[4], ck[5]
+ if f == l then
+ -- already a hit
+ match = true
+ else
+ -- no need to test first hit (to be optimized)
+ local n = f + 1
+ last = last.next
+ -- we cannot optimize for n=2 because there can be disc nodes
+ -- if not someskip and n == l then
+ -- -- n=2 and no skips then faster loop
+ -- match = last and last.id == glyph and last.subtype<256 and last.font == currentfont and sequence[n][last.char]
+ -- else
+ while n <= l do
+ if last then
+ local id = last.id
+ if id == glyph then
+ if last.subtype<256 and last.font == currentfont then
+ local char = last.char
+ local ccd = descriptions[char]
+ if ccd then
+ local class = ccd.class
+ if class == skipmark or class == skipligature or class == skipbase then
+--~ if someskip and class == skipmark or class == skipligature or class == skipbase then
+ -- skip 'm
+ last = last.next
+ elseif sequence[n][char] then
+ if n < l then
+ last = last.next
+ end
+ n = n + 1
+ else
+ match = false break
+ end
+ else
+ match = false break
+ end
+ else
+ match = false break
+ end
+ elseif id == disc then -- what to do with kerns?
+ last = last.next
+ else
+ match = false break
+ end
+ else
+ match = false break
+ end
+ end
+ -- end
+ end
+ if match and f > 1 then
+ local prev = start.prev
+ if prev then
+ local n = f-1
+ while n >= 1 do
+ if prev then
+ local id = prev.id
+ if id == glyph then
+ if prev.subtype<256 and prev.font == currentfont then -- normal char
+ local char = prev.char
+ local ccd = descriptions[char]
+ if ccd then
+ local class = ccd.class
+ if class == skipmark or class == skipligature or class == skipbase then
+--~ if someskip and class == skipmark or class == skipligature or class == skipbase then
+ -- skip 'm
+ elseif sequence[n][char] then
+ n = n -1
+ else
+ match = false break
+ end
+ else
+ match = false break
+ end
+ else
+ match = false break
+ end
+ elseif id == disc then
+ -- skip 'm
+ elseif sequence[n][32] then
+ n = n -1
+ else
+ match = false break
+ end
+ prev = prev.prev
+ elseif sequence[n][32] then
+ n = n -1
+ else
+ match = false break
+ end
+ end
+ elseif f == 2 then
+ match = sequence[1][32]
+ else
+ for n=f-1,1 do
+ if not sequence[n][32] then
+ match = false break
+ end
+ end
+ end
+ end
+ if match and s > l then
+ local current = last.next
+ if current then
+ -- removed optimiziation for s-l == 1, we have to deal with marks anyway
+ local n = l + 1
+ while n <= s do
+ if current then
+ local id = current.id
+ if id == glyph then
+ if current.subtype<256 and current.font == currentfont then -- normal char
+ local char = current.char
+ local ccd = descriptions[char]
+ if ccd then
+ local class = ccd.class
+ if class == skipmark or class == skipligature or class == skipbase then
+--~ if someskip and class == skipmark or class == skipligature or class == skipbase then
+ -- skip 'm
+ elseif sequence[n][char] then
+ n = n + 1
+ else
+ match = false break
+ end
+ else
+ match = false break
+ end
+ else
+ match = false break
+ end
+ elseif id == disc then
+ -- skip 'm
+ elseif sequence[n][32] then -- brrr
+ n = n + 1
+ else
+ match = false break
+ end
+ current = current.next
+ elseif sequence[n][32] then
+ n = n + 1
+ else
+ match = false break
+ end
+ end
+ elseif s-l == 1 then
+ match = sequence[s][32]
+ else
+ for n=l+1,s do
+ if not sequence[n][32] then
+ match = false break
+ end
+ end
+ end
+ end
+ end
+ if match then
+ -- ck == currentcontext
+ if trace_contexts then
+ local rule, lookuptype, sequence, f, l = ck[1], ck[2] ,ck[3], ck[4], ck[5]
+ local char = start.char
+ if ck[9] then
+ logwarning("%s: rule %s matches at char %s for (%s,%s,%s) chars, lookuptype %s (%s=>%s)",cref(kind,chainname),rule,gref(char),f-1,l-f+1,s-l,lookuptype,ck[9],ck[10])
+ else
+ logwarning("%s: rule %s matches at char %s for (%s,%s,%s) chars, lookuptype %s",cref(kind,chainname),rule,gref(char),f-1,l-f+1,s-l,lookuptype)
+ end
+ end
+ local chainlookups = ck[6]
+ if chainlookups then
+ local nofchainlookups = #chainlookups
+ -- we can speed this up if needed
+ if nofchainlookups == 1 then
+ local chainlookupname = chainlookups[1]
+ local chainlookup = lookuptable[chainlookupname]
+ local cp = chainprocs[chainlookup.type]
+ if cp then
+ start, done = cp(start,last,kind,chainname,ck,cache,chainlookup,chainlookupname)
+ else
+ logprocess("%s: %s is not yet supported",cref(kind,chainname,chainlookupname),chainlookup.type)
+ end
+ else
+ -- actually this needs a more complex treatment for which we will use chainmores
+ local i = 1
+ repeat
+ local chainlookupname = chainlookups[i]
+ local chainlookup = lookuptable[chainlookupname]
+ local cp = chainmores[chainlookup.type]
+ if cp then
+ local ok, n
+ start, ok, n = cp(start,last,kind,chainname,ck,cache,chainlookup,chainlookupname,i)
+ -- messy since last can be changed !
+ if ok then
+ done = true
+ start = start.next
+ if n then
+ -- skip next one(s) if ligature
+ i = i + n - 1
+ end
+ end
+ else
+ logprocess("%s: multiple subchains for %s are not yet supported",cref(kind,chainname,chainlookupname),chainlookup.type)
+ end
+ i = i + 1
+ until i > nofchainlookups
+ end
+ else
+ local replacements = ck[7]
+ if replacements then
+ start, done = chainprocs.reversesub(start,last,kind,chainname,ck,cache,replacements)
+ else
+ done = true -- can be meant to be skipped
+ if trace_contexts then
+ logprocess("%s: skipping match",cref(kind,chainname))
+ end
+ end
+ end
+ end
+ end
+ return start, done
+end
+
+-- Because we want to keep this elsewhere (an because speed is less an issue) we
+-- pass the font id so that the verbose variant can access the relevant helper tables.
+
+local verbose_handle_contextchain = function(font,...)
+ logwarning("no verbose handler installed, reverting to 'normal'")
+ otf.setcontextchain()
+ return normal_handle_contextchain(...)
+end
+
+otf.chainhandlers = {
+ normal = normal_handle_contextchain,
+ verbose = verbose_handle_contextchain,
+}
+
+function otf.setcontextchain(method)
+ if not method or method == "normal" or not otf.chainhandlers[method] then
+ if handlers.contextchain then -- no need for a message while making the format
+ logwarning("installing normal contextchain handler")
+ end
+ handlers.contextchain = normal_handle_contextchain
+ else
+ logwarning("installing contextchain handler '%s'",method)
+ local handler = otf.chainhandlers[method]
+ handlers.contextchain = function(...)
+ return handler(currentfont,...)
+ end
+ end
+ handlers.gsub_context = handlers.contextchain
+ handlers.gsub_contextchain = handlers.contextchain
+ handlers.gsub_reversecontextchain = handlers.contextchain
+ handlers.gpos_contextchain = handlers.contextchain
+ handlers.gpos_context = handlers.contextchain
+end
+
+otf.setcontextchain()
+
+local missing = { } -- we only report once
+
+local function logprocess(...)
+ logs.report("otf process",registermessage(...))
+end
+local function logwarning(...)
+ logs.report("otf process",...)
+end
+
+local function report_missing_cache(typ,lookup)
+ local f = missing[currentfont] if not f then f = { } missing[currentfont] = f end
+ local t = f[typ] if not t then t = { } f[typ] = t end
+ if not t[lookup] then
+ t[lookup] = true
+ logwarning("missing cache for lookup %s of type %s in font %s (%s)",lookup,typ,currentfont,tfmdata.fullname)
+ end
+end
+
+local resolved = { } -- we only resolve a font,script,language pair once
+
+function fonts.methods.node.otf.features(head,font,attr)
+ if trace_steps then
+ checkstep(head)
+ end
+ tfmdata = fontdata[font]
+ local shared = tfmdata.shared
+ otfdata = shared.otfdata
+ local luatex = otfdata.luatex
+ descriptions = tfmdata.descriptions
+ characters = tfmdata.characters
+ indices = tfmdata.indices
+ unicodes = tfmdata.unicodes
+ marks = tfmdata.marks
+ anchorlookups = luatex.lookup_to_anchor
+ currentfont = font
+ rlmode = 0
+ local featuredata = otfdata.shared.featuredata -- can be made local to closure
+ local sequences = luatex.sequences
+ lookuptable = luatex.lookups
+ local done = false
+ local script, language, enabled
+ if attr and attr > 0 then
+ local features = context_setups[context_numbers[attr]] -- could be a direct list
+ language, script = features.language or "dflt", features.script or "dflt"
+ enabled = features -- shared.features -- can be made local to the resolver
+ else
+ language, script = tfmdata.language or "dflt", tfmdata.script or "dflt"
+ enabled = shared.features -- can be made local to the resolver
+ end
+ -- we can save some runtime by caching feature tests
+ local res = resolved[font] if not res then res = { } resolved[font] = res end
+ local rs = res [script] if not rs then rs = { } res [script] = rs end
+ local rl = rs [language] if not rl then rl = { } rs [language] = rl end
+ local ra = rl [attr] if ra == nil then ra = { } rl [attr] = ra end -- attr can be false
+ -- sequences always > 1 so no need for optimization
+ for s=1,#sequences do
+ local success = false
+ local sequence = sequences[s]
+ local r = ra[s] -- cache
+ if not r then
+ local typ = sequence.type
+ -- we could save this in the tma/c file
+--~ local chain
+--~ if typ == "gsub_contextchain" or typ == "gpos_contextchain" then
+--~ chain = 1
+--~ elseif typ == "gsub_reversecontextchain" or typ == "gpos_reversecontextchain" then
+--~ chain = -1
+--~ else
+--~ chain = 0
+--~ end
+local chain = sequence.chain or 0
+ local features = sequence.features
+ if not features then
+ -- indirect lookup, part of chain (todo: make this a separate table)
+ r = { false, false, chain }
+ else
+ local valid, attribute, kind = false, false
+ for k,v in next, features do
+ if enabled[k] then
+ local l = v[script] or v[wildcard]
+ if l and (l[language] or l[wildcard]) then
+ valid = true
+ kind = k
+ attribute = special_attributes[k] or false -- only first, so we assume simple fina's
+ break
+ end
+ end
+ end
+ if kind then
+ r = { valid, attribute, chain, kind }
+ else
+ r = { valid, attribute, chain, "generic" } -- false anyway
+ end
+ end
+ ra[s] = r
+ end
+ if r[1] then -- valid
+ local attribute, chain, typ, subtables = r[2], r[3], sequence.type, sequence.subtables
+ if chain < 0 then
+ -- this is a limited case, no special treatments like 'init' etc
+ local handler = handlers[typ]
+ local thecache = featuredata[typ] or { }
+ -- we need to get rid of this slide !
+ start = slide_node_list(head) -- slow (we can store tail because there's always a skip at the end): todo
+ while start do
+ local id = start.id
+ if id == glyph then
+ if start.subtype<256 and start.font == font and (not attr or has_attribute(start,0,attr)) then
+ for i=1,#subtables do
+ local lookupname = subtables[i]
+ local lookupcache = thecache[lookupname]
+ if lookupcache then
+ local lookupmatch = lookupcache[start.char]
+ if lookupmatch then
+ start, success = handler(start,r[4],lookupname,lookupmatch,sequence,featuredata,i)
+ if success then
+ break
+ end
+ end
+ else
+ report_missing_cache(typ,lookupname)
+ end
+ end
+ if start then start = start.prev end
+ else
+ start = start.prev
+ end
+ else
+ start = start.prev
+ end
+ end
+ else
+ local handler = handlers[typ]
+ local ns = #subtables
+ local thecache = featuredata[typ] or { }
+ start = head -- local ?
+ rlmode = 0
+ if ns == 1 then
+ local lookupname = subtables[1]
+ local lookupcache = thecache[lookupname]
+ if not lookupcache then
+ report_missing_cache(typ,lookupname)
+ else
+ while start do
+ local id = start.id
+ if id == glyph then
+ if start.font == font and start.subtype<256 and (not attr or has_attribute(start,0,attr)) and (not attribute or has_attribute(start,state,attribute)) then
+ local lookupmatch = lookupcache[start.char]
+ if lookupmatch then
+ -- sequence kan weg
+ local ok
+ start, ok = handler(start,r[4],lookupname,lookupmatch,sequence,featuredata,1)
+ if ok then
+ success = true
+ end
+ end
+ if start then start = start.next end
+ else
+ start = start.next
+ end
+ -- elseif id == glue then
+ -- if p[5] then -- chain
+ -- local pc = pp[32]
+ -- if pc then
+ -- start, ok = start, false -- p[1](start,kind,p[2],pc,p[3],p[4])
+ -- if ok then
+ -- done = true
+ -- end
+ -- if start then start = start.next end
+ -- else
+ -- start = start.next
+ -- end
+ -- else
+ -- start = start.next
+ -- end
+ elseif id == whatsit then
+ local subtype = start.subtype
+ if subtype == 7 then
+ local dir = start.dir
+ if dir == "+TRT" then
+ rlmode = -1
+ elseif dir == "+TLT" then
+ rlmode = 1
+ else
+ rlmode = 0
+ end
+ elseif subtype == 6 then
+ local dir = start.dir
+ if dir == "TRT" then
+ rlmode = -1
+ elseif dir == "TLT" then
+ rlmode = 1
+ else
+ rlmode = 0
+ end
+ end
+ start = start.next
+ else
+ start = start.next
+ end
+ end
+
+ end
+ else
+ while start do
+ local id = start.id
+ if id == glyph then
+ if start.subtype<256 and start.font == font and (not attr or has_attribute(start,0,attr)) and (not attribute or has_attribute(start,state,attribute)) then
+ for i=1,ns do
+ local lookupname = subtables[i]
+ local lookupcache = thecache[lookupname]
+ if lookupcache then
+ local lookupmatch = lookupcache[start.char]
+ if lookupmatch then
+ -- we could move all code inline but that makes things even more unreadable
+ local ok
+ start, ok = handler(start,r[4],lookupname,lookupmatch,sequence,featuredata,i)
+ if ok then
+ success = true
+ break
+ end
+ end
+ else
+ report_missing_cache(typ,lookupname)
+ end
+ end
+ if start then start = start.next end
+ else
+ start = start.next
+ end
+ -- elseif id == glue then
+ -- if p[5] then -- chain
+ -- local pc = pp[32]
+ -- if pc then
+ -- start, ok = start, false -- p[1](start,kind,p[2],pc,p[3],p[4])
+ -- if ok then
+ -- done = true
+ -- end
+ -- if start then start = start.next end
+ -- else
+ -- start = start.next
+ -- end
+ -- else
+ -- start = start.next
+ -- end
+ elseif id == whatsit then
+ local subtype = start.subtype
+ if subtype == 7 then
+ local dir = start.dir
+ if dir == "+TRT" then
+ rlmode = -1
+ elseif dir == "+TLT" then
+ rlmode = 1
+ else
+ rlmode = 0
+ end
+ elseif subtype == 6 then
+ local dir = start.dir
+ if dir == "TRT" then
+ rlmode = -1
+ elseif dir == "TLT" then
+ rlmode = 1
+ else
+ rlmode = 0
+ end
+ end
+ start = start.next
+ else
+ start = start.next
+ end
+ end
+ end
+ end
+ if success then
+ done = true
+ end
+--~ if trace_steps then
+ registerstep(head)
+--~ end
+ end
+ end
+ return head, done
+end
+
+otf.features.prepare = { }
+
+-- we used to share code in the following functions but that costs a lot of
+-- memory due to extensive calls to functions (easily hundreds of thousands per
+-- document)
+
+local function split(replacement,original,cache,unicodes)
+ -- we can cache this too, but not the same
+ local o, t, n = { }, { }, 0
+ for s in gmatch(original,"[^ ]+") do
+ local us = unicodes[s]
+ if type(us) == "number" then
+ o[#o+1] = us
+ else
+ o[#o+1] = us[1]
+ end
+ end
+ for s in gmatch(replacement,"[^ ]+") do
+ n = n + 1
+ local us = unicodes[s]
+ if type(us) == "number" then
+ t[o[n]] = us
+ else
+ t[o[n]] = us[1]
+ end
+ end
+ return t
+end
+
+local function uncover(covers,result,cache,unicodes)
+ -- lpeg hardly faster (.005 sec on mk)
+ for n=1,#covers do
+ local c = covers[n]
+ local cc = cache[c]
+ if not cc then
+ local t = { }
+ for s in gmatch(c,"[^ ]+") do
+ local us = unicodes[s]
+ if type(us) == "number" then
+ t[us] = true
+ else
+ for i=1,#us do
+ t[us[i]] = true
+ end
+ end
+ end
+ cache[c] = t
+ result[#result+1] = t
+ else
+ result[#result+1] = cc
+ end
+ end
+end
+
+local function prepare_lookups(tfmdata)
+ local otfdata = tfmdata.shared.otfdata
+ local featuredata = otfdata.shared.featuredata
+ local anchor_to_lookup = otfdata.luatex.anchor_to_lookup
+ local lookup_to_anchor = otfdata.luatex.lookup_to_anchor
+ --
+ local multiple = featuredata.gsub_multiple
+ local alternate = featuredata.gsub_alternate
+ local single = featuredata.gsub_single
+ local ligature = featuredata.gsub_ligature
+ local pair = featuredata.gpos_pair
+ local position = featuredata.gpos_single
+ local kerns = featuredata.gpos_pair
+ local mark = featuredata.gpos_mark2mark
+ local cursive = featuredata.gpos_cursive
+ --
+ local unicodes = tfmdata.unicodes -- names to unicodes
+ local indices = tfmdata.indices
+ local descriptions = tfmdata.descriptions
+ --
+ -- we can change the otf table after loading but then we need to adapt base mode
+ -- as well (no big deal)
+ --
+ for unicode, glyph in next, descriptions do
+ local lookups = glyph.lookups
+ if lookups then
+ for lookup, whatever in next, lookups do
+ for i=1,#whatever do -- normaly one
+ local p = whatever[i]
+ local what = p[1]
+ if what == 'substitution' then
+ local old, new = unicode, unicodes[p[2]]
+ if type(new) == "table" then
+ new = new[1]
+ end
+ local s = single[lookup]
+ if not s then s = { } single[lookup] = s end
+ s[old] = new
+--~ if trace_lookups then
+--~ logs.report("define otf","lookup %s: substitution %s => %s",lookup,old,new)
+--~ end
+ break
+ elseif what == 'multiple' then
+ local old, new = unicode, { }
+ local m = multiple[lookup]
+ if not m then m = { } multiple[lookup] = m end
+ m[old] = new
+ for pc in gmatch(p[2],"[^ ]+") do
+ local upc = unicodes[pc]
+ if type(upc) == "number" then
+ new[#new+1] = upc
+ else
+ new[#new+1] = upc[1]
+ end
+ end
+--~ if trace_lookups then
+--~ logs.report("define otf","lookup %s: multiple %s => %s",lookup,old,concat(new," "))
+--~ end
+ break
+ elseif what == 'alternate' then
+ local old, new = unicode, { }
+ local a = alternate[lookup]
+ if not a then a = { } alternate[lookup] = a end
+ a[old] = new
+ for pc in gmatch(p[2],"[^ ]+") do
+ local upc = unicodes[pc]
+ if type(upc) == "number" then
+ new[#new+1] = upc
+ else
+ new[#new+1] = upc[1]
+ end
+ end
+--~ if trace_lookups then
+--~ logs.report("define otf","lookup %s: alternate %s => %s",lookup,old,concat(new,"|"))
+--~ end
+ break
+ elseif what == "ligature" then
+--~ if trace_lookups then
+--~ logs.report("define otf","lookup %s: ligature %s => %s",lookup,p[2],glyph.name)
+--~ end
+ local first = true
+ local t = ligature[lookup]
+ if not t then t = { } ligature[lookup] = t end
+ for s in gmatch(p[2],"[^ ]+") do
+ if first then
+ local u = unicodes[s]
+ if not u then
+ logs.report("define otf","lookup %s: ligature %s => %s ignored due to invalid unicode",lookup,p[2],glyph.name)
+ break
+ elseif type(u) == "number" then
+ if not t[u] then
+ t[u] = { { } }
+ end
+ t = t[u]
+ else
+ local tt = t
+ local tu
+ for i=1,#u do
+ local u = u[i]
+ if i==1 then
+ if not t[u] then
+ t[u] = { { } }
+ end
+ tu = t[u]
+ t = tu
+ else
+ if not t[u] then
+ tt[u] = tu
+ end
+ end
+ end
+ end
+ first = false
+ else
+ s = unicodes[s]
+ local t1 = t[1]
+ if not t1[s] then
+ t1[s] = { { } }
+ end
+ t = t1[s]
+ end
+ end
+ t[2] = unicode
+ elseif what == 'position' then
+ -- not used
+ local s = position[lookup]
+ if not s then s = { } position[lookup] = s end
+ s[unicode] = p[2] -- direct pointer to kern spec
+ elseif what == 'pair' then
+ local s = pair[lookup]
+ if not s then s = { } pair[lookup] = s end
+ local others = s[unicode]
+ if not others then others = { } s[unicode] = others end
+ -- todo: fast check for space
+ local two = p[2]
+ local upc = unicodes[two]
+ if not upc then
+ for pc in gmatch(two,"[^ ]+") do
+ local upc = unicodes[pc]
+ if type(upc) == "number" then
+ others[upc] = p -- direct pointer to main table
+ else
+ for i=1,#upc do
+ others[upc[i]] = p -- direct pointer to main table
+ end
+ end
+ end
+ elseif type(upc) == "number" then
+ others[upc] = p -- direct pointer to main table
+ else
+ for i=1,#upc do
+ others[upc[i]] = p -- direct pointer to main table
+ end
+ end
+--~ if trace_lookups then
+--~ logs.report("define otf","lookup %s: pair for U+%04X",lookup,unicode)
+--~ end
+ end
+ end
+ end
+ end
+ local list = glyph.mykerns
+ if list then
+ for lookup, krn in next, list do
+ local k = kerns[lookup]
+ if not k then k = { } kerns[lookup] = k end
+ k[unicode] = krn -- ref to glyph, saves lookup
+--~ if trace_lookups then
+--~ logs.report("define otf","lookup %s: kern for U+%04X",lookup,unicode)
+--~ end
+ end
+ end
+ local oanchor = glyph.anchors
+ if oanchor then
+ for typ, anchors in next, oanchor do -- types
+ if typ == "mark" then
+ for name, anchor in next, anchors do
+ local lookups = anchor_to_lookup[name]
+ if lookups then
+ for lookup, _ in next, lookups do
+ local f = mark[lookup]
+ if not f then f = { } mark[lookup] = f end
+ f[unicode] = anchors -- ref to glyph, saves lookup
+--~ if trace_lookups then
+--~ logs.report("define otf","lookup %s: mark anchor %s for U+%04X",lookup,name,unicode)
+--~ end
+ end
+ end
+ end
+ elseif typ == "cexit" then -- or entry?
+ for name, anchor in next, anchors do
+ local lookups = anchor_to_lookup[name]
+ if lookups then
+ for lookup, _ in next, lookups do
+ local f = cursive[lookup]
+ if not f then f = { } cursive[lookup] = f end
+ f[unicode] = anchors -- ref to glyph, saves lookup
+--~ if trace_lookups then
+--~ logs.report("define otf","lookup %s: exit anchor %s for U+%04X",lookup,name,unicode)
+--~ end
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+end
+
+-- local cache = { }
+luatex = luatex or {} -- this has to change ... we need a better one
+
+function prepare_contextchains(tfmdata)
+ local otfdata = tfmdata.shared.otfdata
+ local lookups = otfdata.lookups
+ if lookups then
+ local featuredata = otfdata.shared.featuredata
+ local contextchain = featuredata.gsub_contextchain -- shared with gpos
+ local reversecontextchain = featuredata.gsub_reversecontextchain -- shared with gpos
+ local characters = tfmdata.characters
+ local unicodes = tfmdata.unicodes
+ local indices = tfmdata.indices
+ local cache = luatex.covers
+ if not cache then
+ cache = { }
+ luatex.covers = cache
+ end
+ --
+ for lookupname, lookupdata in next, otfdata.lookups do
+ local lookuptype = lookupdata.type
+ if not lookuptype then
+ logs.report("otf process","missing lookuptype for %s",lookupname)
+ else
+ local rules = lookupdata.rules
+ if rules then
+ local fmt = lookupdata.format
+ -- contextchain[lookupname][unicode]
+ if fmt == "coverage" then
+ if lookuptype ~= "chainsub" and lookuptype ~= "chainpos" then
+ logs.report("otf process","unsupported coverage %s for %s",lookuptype,lookupname)
+ else
+ local contexts = contextchain[lookupname]
+ if not contexts then
+ contexts = { }
+ contextchain[lookupname] = contexts
+ end
+ local t = { }
+ for nofrules=1,#rules do -- does #rules>1 happen often?
+ local rule = rules[nofrules]
+ local coverage = rule.coverage
+ if coverage and coverage.current then
+ local current, before, after, sequence = coverage.current, coverage.before, coverage.after, { }
+ if before then
+ uncover(before,sequence,cache,unicodes)
+ end
+ local start = #sequence + 1
+ uncover(current,sequence,cache,unicodes)
+ local stop = #sequence
+ if after then
+ uncover(after,sequence,cache,unicodes)
+ end
+ if sequence[1] then
+ t[#t+1] = { nofrules, lookuptype, sequence, start, stop, rule.lookups }
+ for unic, _ in next, sequence[start] do
+ local cu = contexts[unic]
+ if not cu then
+ contexts[unic] = t
+ end
+ end
+ end
+ end
+ end
+ end
+ elseif fmt == "reversecoverage" then
+ if lookuptype ~= "reversesub" then
+ logs.report("otf process","unsupported reverse coverage %s for %s",lookuptype,lookupname)
+ else
+ local contexts = reversecontextchain[lookupname]
+ if not contexts then
+ contexts = { }
+ reversecontextchain[lookupname] = contexts
+ end
+ local t = { }
+ for nofrules=1,#rules do
+ local rule = rules[nofrules]
+ local reversecoverage = rule.reversecoverage
+ if reversecoverage and reversecoverage.current then
+ local current, before, after, replacements, sequence = reversecoverage.current, reversecoverage.before, reversecoverage.after, reversecoverage.replacements, { }
+ if before then
+ uncover(before,sequence,cache,unicodes)
+ end
+ local start = #sequence + 1
+ uncover(current,sequence,cache,unicodes)
+ local stop = #sequence
+ if after then
+ uncover(after,sequence,cache,unicodes)
+ end
+ if replacements then
+ replacements = split(replacements,current[1],cache,unicodes)
+ end
+ if sequence[1] then
+ -- this is different from normal coverage, we assume only replacements
+ t[#t+1] = { nofrules, lookuptype, sequence, start, stop, rule.lookups, replacements }
+ for unic, _ in next, sequence[start] do
+ local cu = contexts[unic]
+ if not cu then
+ contexts[unic] = t
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+end
+
+function fonts.initializers.node.otf.features(tfmdata,value)
+ if true then -- value then
+ if not tfmdata.shared.otfdata.shared.initialized then
+ local t = trace_preparing and os.clock()
+ local otfdata = tfmdata.shared.otfdata
+ local featuredata = otfdata.shared.featuredata
+ -- caches
+ featuredata.gsub_multiple = { }
+ featuredata.gsub_alternate = { }
+ featuredata.gsub_single = { }
+ featuredata.gsub_ligature = { }
+ featuredata.gsub_contextchain = { }
+ featuredata.gsub_reversecontextchain = { }
+ featuredata.gpos_pair = { }
+ featuredata.gpos_single = { }
+ featuredata.gpos_mark2base = { }
+ featuredata.gpos_mark2ligature = featuredata.gpos_mark2base
+ featuredata.gpos_mark2mark = featuredata.gpos_mark2base
+ featuredata.gpos_cursive = { }
+ featuredata.gpos_contextchain = featuredata.gsub_contextchain
+ featuredata.gpos_reversecontextchain = featuredata.gsub_reversecontextchain
+ --
+ prepare_contextchains(tfmdata)
+ prepare_lookups(tfmdata)
+ otfdata.shared.initialized = true
+ if trace_preparing then
+ logs.report("otf process","preparation time is %0.3f seconds for %s",os.clock()-t,tfmdata.fullname or "?")
+ end
+ end
+ end
+end
diff --git a/otfl-font-tfm.lua b/otfl-font-tfm.lua
new file mode 100644
index 0000000..9d5a774
--- /dev/null
+++ b/otfl-font-tfm.lua
@@ -0,0 +1,780 @@
+if not modules then modules = { } end modules ['font-tfm'] = {
+ version = 1.001,
+ comment = "companion to font-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local utf = unicode.utf8
+
+local next, format, match, lower = next, string.format, string.match, string.lower
+local concat, sortedkeys, utfbyte = table.concat, table.sortedkeys, utf.byte
+
+local trace_defining = false trackers.register("fonts.defining", function(v) trace_defining = v end)
+local trace_scaling = false trackers.register("fonts.scaling" , function(v) trace_scaling = v end)
+
+-- tfmdata has also fast access to indices and unicodes
+-- to be checked: otf -> tfm -> tfmscaled
+--
+-- watch out: no negative depths and negative eights permitted in regular fonts
+
+--[[ldx--
+<p>Here we only implement a few helper functions.</p>
+--ldx]]--
+
+fonts = fonts or { }
+fonts.tfm = fonts.tfm or { }
+fonts.ids = fonts.ids or { }
+
+local tfm = fonts.tfm
+
+fonts.loaded = fonts.loaded or { }
+fonts.dontembed = fonts.dontembed or { }
+fonts.triggers = fonts.triggers or { } -- brrr
+fonts.initializers = fonts.initializers or { }
+fonts.initializers.common = fonts.initializers.common or { }
+
+local fontdata = fonts.ids
+local glyph = node.id('glyph')
+local set_attribute = node.set_attribute
+
+--[[ldx--
+<p>The next function encapsulates the standard <l n='tfm'/> loader as
+supplied by <l n='luatex'/>.</p>
+--ldx]]--
+
+tfm.resolve_vf = true -- false
+tfm.share_base_kerns = false -- true (.5 sec slower on mk but brings down mem from 410M to 310M, beware: then script/lang share too)
+tfm.mathactions = { }
+
+function tfm.enhance(tfmdata,specification)
+ local name, size = specification.name, specification.size
+ local encoding, filename = match(name,"^(.-)%-(.*)$") -- context: encoding-name.*
+ if filename and encoding and fonts.enc.known[encoding] then
+ local data = fonts.enc.load(encoding)
+ if data then
+ local characters = tfmdata.characters
+ tfmdata.encoding = encoding
+ local vector = data.vector
+ local original = { }
+ for k, v in next, characters do
+ v.name = vector[k]
+ v.index = k
+ original[k] = v
+ end
+ for k,v in next, data.unicodes do
+ if k ~= v then
+ if trace_defining then
+ logs.report("define font","mapping %s onto %s",k,v)
+ end
+ characters[k] = original[v]
+ end
+ end
+ end
+ end
+end
+
+function tfm.read_from_tfm(specification)
+ local fname, tfmdata = specification.filename or "", nil
+ if fname ~= "" then
+ if trace_defining then
+ logs.report("define font","loading tfm file %s at size %s",fname,specification.size)
+ end
+ tfmdata = font.read_tfm(fname,specification.size) -- not cached, fast enough
+ if tfmdata then
+ tfmdata.descriptions = tfmdata.descriptions or { }
+ if tfm.resolve_vf then
+ fonts.logger.save(tfmdata,file.extname(fname),specification) -- strange, why here
+ fname = input.findbinfile(specification.name, 'ovf')
+ if fname and fname ~= "" then
+ local vfdata = font.read_vf(fname,specification.size) -- not cached, fast enough
+ if vfdata then
+ local chars = tfmdata.characters
+ for k,v in next, vfdata.characters do
+ chars[k].commands = v.commands
+ end
+ tfmdata.type = 'virtual'
+ tfmdata.fonts = vfdata.fonts
+ end
+ end
+ end
+ tfm.enhance(tfmdata,specification)
+ end
+ else
+ if trace_defining then
+ logs.report("define font","loading tfm with name %s fails",specification.name)
+ end
+ end
+ return tfmdata
+end
+
+--[[ldx--
+<p>We need to normalize the scale factor (in scaled points). This has to
+do with the fact that <l n='tex'/> uses a negative multiple of 1000 as
+a signal for a font scaled based on the design size.</p>
+--ldx]]--
+
+local factors = {
+ pt = 65536.0,
+ bp = 65781.8,
+}
+
+function tfm.setfactor(f)
+ tfm.factor = factors[f or 'pt'] or factors.pt
+end
+
+tfm.setfactor()
+
+function tfm.scaled(scaledpoints, designsize) -- handles designsize in sp as well
+ if scaledpoints < 0 then
+ if designsize then
+ if designsize > tfm.factor then -- or just 1000 / when? mp?
+ return (- scaledpoints/1000) * designsize -- sp's
+ else
+ return (- scaledpoints/1000) * designsize * tfm.factor
+ end
+ else
+ return (- scaledpoints/1000) * 10 * tfm.factor
+ end
+ else
+ return scaledpoints
+ end
+end
+
+--[[ldx--
+<p>Before a font is passed to <l n='tex'/> we scale it. Here we also need
+to scale virtual characters.</p>
+--ldx]]--
+
+function tfm.get_virtual_id(tfmdata)
+ -- since we don't know the id yet, we use 0 as signal
+ if not tfmdata.fonts then
+ tfmdata.type = "virtual"
+ tfmdata.fonts = { { id = 0 } }
+ return 1
+ else
+ tfmdata.fonts[#tfmdata.fonts+1] = { id = 0 }
+ return #tfmdata.fonts
+ end
+end
+
+function tfm.check_virtual_id(tfmdata, id)
+ if tfmdata and tfmdata.type == "virtual" then
+ if not tfmdata.fonts or #tfmdata.fonts == 0 then
+ tfmdata.type, tfmdata.fonts = "real", nil
+ else
+ local vfonts = tfmdata.fonts
+ for f=1,#vfonts do
+ local fnt = vfonts[f]
+ if fnt.id and fnt.id == 0 then
+ fnt.id = id
+ end
+ end
+ end
+ end
+end
+
+--[[ldx--
+<p>Beware, the boundingbox is passed as reference so we may not overwrite it
+in the process; numbers are of course copies. Here 65536 equals 1pt. (Due to
+excessive memory usage in CJK fonts, we no longer pass the boundingbox.)</p>
+--ldx]]--
+
+fonts.trace_scaling = false
+
+-- the following hack costs a bit of runtime but safes memory
+--
+-- basekerns are scaled and will be hashed by table id
+-- sharedkerns are unscaled and are be hashed by concatenated indexes
+
+function tfm.check_base_kerns(tfmdata)
+ if tfm.share_base_kerns then
+ local sharedkerns = tfmdata.sharedkerns
+ if sharedkerns then
+ local basekerns = { }
+ tfmdata.basekerns = basekerns
+ return sharedkerns, basekerns
+ end
+ end
+ return nil, nil
+end
+
+function tfm.prepare_base_kerns(tfmdata)
+ if tfm.share_base_kerns and not tfmdata.sharedkerns then
+ local sharedkerns = { }
+ tfmdata.sharedkerns = sharedkerns
+ for u, chr in next, tfmdata.characters do
+ local kerns = chr.kerns
+ if kerns then
+ local hash = concat(sortedkeys(kerns), " ")
+ local base = sharedkerns[hash]
+ if not base then
+ sharedkerns[hash] = kerns
+ else
+ chr.kerns = base
+ end
+ end
+ end
+ end
+end
+
+function tfm.do_scale(tfmtable, scaledpoints)
+ tfm.prepare_base_kerns(tfmtable) -- optimalization
+ if scaledpoints < 0 then
+ scaledpoints = (- scaledpoints/1000) * tfmtable.designsize -- already in sp
+ end
+ local delta = scaledpoints/(tfmtable.units or 1000) -- brr, some open type fonts have 2048
+ local t = { }
+ -- unicoded unique descriptions shared cidinfo characters changed parameters indices
+ for k,v in next, tfmtable do
+ if type(v) == "table" then
+ -- print(k)
+ else
+ t[k] = v
+ end
+ end
+ -- status
+ local isvirtual = tfmtable.type == "virtual" or tfmtable.virtualized
+ local hasmath = tfmtable.math_parameters ~= nil or tfmtable.MathConstants ~= nil
+ local nodemode = tfmtable.mode == "node"
+ local hasquality = tfmtable.auto_expand or tfmtable.auto_protrude
+ --
+ t.parameters = { }
+ t.characters = { }
+ t.MathConstants = { }
+ -- fast access
+ local descriptions = tfmtable.descriptions or { }
+ t.unicodes = tfmtable.unicodes
+ t.indices = tfmtable.indices
+ t.marks = tfmtable.marks
+ t.descriptions = descriptions
+ if tfmtable.fonts then
+ t.fonts = table.fastcopy(tfmtable.fonts) -- hm also at the end
+ end
+ local tp = t.parameters
+ local mp = t.math_parameters
+ local tfmp = tfmtable.parameters -- let's check for indexes
+ --
+ tp.slant = (tfmp.slant or tfmp[1] or 0)
+ tp.space = (tfmp.space or tfmp[2] or 0)*delta
+ tp.space_stretch = (tfmp.space_stretch or tfmp[3] or 0)*delta
+ tp.space_shrink = (tfmp.space_shrink or tfmp[4] or 0)*delta
+ tp.x_height = (tfmp.x_height or tfmp[5] or 0)*delta
+ tp.quad = (tfmp.quad or tfmp[6] or 0)*delta
+ tp.extra_space = (tfmp.extra_space or tfmp[7] or 0)*delta
+--~ texio.write_nl("START")
+--~ texio.write_nl(tfmtable.designsize)
+--~ texio.write_nl(scaledpoints)
+--~ texio.write_nl(tfmtable.units)
+--~ texio.write_nl(delta)
+--~ texio.write_nl(tfmtable.math_parameters.AxisHeight or "?")
+-- t.MathConstants = tfm.scaled_math_parameters(tfmtable.math_parameters,delta)
+--~ texio.write_nl(t.MathConstants.AxisHeight or "?")
+ local protrusionfactor = (tp.quad ~= 0 and 1000/tp.quad) or 0
+ local tc = t.characters
+ local characters = tfmtable.characters
+ local nameneeded = not tfmtable.shared.otfdata --hack
+ local changed = tfmtable.changed or { } -- for base mode
+ local ischanged = not table.is_empty(changed)
+ local indices = tfmtable.indices
+ local luatex = tfmtable.luatex
+ local tounicode = luatex and luatex.tounicode
+ local defaultwidth = luatex and luatex.defaultwidth or 0
+ local defaultheight = luatex and luatex.defaultheight or 0
+ local defaultdepth = luatex and luatex.defaultdepth or 0
+ -- experimental, sharing kerns (unscaled and scaled) saves memory
+ local sharedkerns, basekerns = tfm.check_base_kerns(tfmtable)
+ -- loop over descriptions (afm and otf have descriptions, tfm not)
+ -- there is no need (yet) to assign a value to chr.tonunicode
+ local scaledwidth = defaultwidth * delta
+ local scaledheight = defaultheight * delta
+ local scaleddepth = defaultdepth * delta
+ for k,v in next, characters do
+ local chr, description, index
+ if ischanged then
+ -- basemode hack
+ local c = changed[k]
+ if c then
+ description = descriptions[c] or v
+ v = characters[c] or v
+ index = (indices and indices[c]) or c
+ else
+ description = descriptions[k] or v
+ index = (indices and indices[k]) or k
+ end
+ else
+ description = descriptions[k] or v
+ index = (indices and indices[k]) or k
+ end
+ local width = description.width
+ local height = description.height
+ local depth = description.depth
+ if width then width = delta*width else width = scaledwidth end
+ if height then height = delta*height else height = scaledheight end
+ -- if depth then depth = delta*depth else depth = scaleddepth end
+ if depth and depth ~= 0 then
+ depth = delta*depth
+ if nameneeded then
+ chr = {
+ name = description.name,
+ index = index,
+ height = height,
+ depth = depth,
+ width = width,
+ }
+ else
+ chr = {
+ index = index,
+ height = height,
+ depth = depth,
+ width = width,
+ }
+ end
+ else
+ -- this saves a little bit of memory time and memory, esp for big cjk fonts
+ if nameneeded then
+ chr = {
+ name = description.name,
+ index = index,
+ height = height,
+ width = width,
+ }
+ else
+ chr = {
+ index = index,
+ height = height,
+ width = width,
+ }
+ end
+ end
+ -- if trace_scaling then
+ -- logs.report("define font","t=%s, u=%s, i=%s, n=%s c=%s",k,chr.tounicode or k,description.index,description.name or '-',description.class or '-')
+ -- end
+ if tounicode then
+ local tu = tounicode[index]
+ if tu then
+ chr.tounicode = tu
+ end
+ end
+ if hasquality then
+ local ve = v.expansion_factor
+ if ve then
+ chr.expansion_factor = ve*1000 -- expansionfactor
+ end
+ local vl = v.left_protruding
+ if vl then
+ chr.left_protruding = protrusionfactor*width*vl
+ end
+ local vr = v.right_protruding
+ if vr then
+ chr.right_protruding = protrusionfactor*width*vr
+ end
+ end
+ -- todo: hasitalic
+ local vi = description.italic or v.italic
+ if vi then
+ chr.italic = vi*delta
+ end
+ -- note needed if no math: todo: hasmath
+--~ if hasmath then
+ local vn = v.next
+ if vn then
+ chr.next = vn
+ else
+ local vv = v.vert_variants
+ if vv then
+ local t = { }
+ for i=1,#vv do
+ local vvi = vv[i]
+ t[i] = {
+ ["start"] = (vvi["start"] or 0)*delta,
+ ["end"] = (vvi["end"] or 0)*delta,
+ ["advance"] = (vvi["advance"] or 0)*delta,
+ ["extender"] = vvi["extender"],
+ ["glyph"] = vvi["glyph"],
+ }
+ end
+ chr.vert_variants = t
+ else
+ local hv = v.horiz_variants
+ if hv then
+ local t = { }
+ for i=1,#hv do
+ local hvi = hv[i]
+ t[i] = {
+ ["start"] = (hvi["start"] or 0)*delta,
+ ["end"] = (hvi["end"] or 0)*delta,
+ ["advance"] = (hvi["advance"] or 0)*delta,
+ ["extender"] = hvi["extender"],
+ ["glyph"] = hvi["glyph"],
+ }
+ end
+ chr.horiz_variants = t
+ end
+ end
+ end
+ local vt = description.top_accent
+ if vt then
+ chr.top_accent = delta*vt
+ end
+--~ end
+ if not nodemode then
+ local vk = v.kerns
+ if vk then
+ if sharedkerns then
+ local base = basekerns[vk] -- hashed by table id, not content
+ if not base then
+ base = {}
+ for k,v in next, vk do base[k] = v*delta end
+ basekerns[vk] = base
+ end
+ chr.kerns = base
+ else
+ local tt = {}
+ for k,v in next, vk do tt[k] = v*delta end
+ chr.kerns = tt
+ end
+ end
+ local vl = v.ligatures
+ if vl then
+ if true then
+ chr.ligatures = vl -- shared
+ else
+ local tt = { }
+ for i,l in next, vl do
+ tt[i] = l
+ end
+ chr.ligatures = tt
+ end
+ end
+ end
+ if isvirtual then
+ local vc = v.commands
+ if vc then
+ -- we assume non scaled commands here
+ local ok = false
+ for i=1,#vc do
+ local key = vc[i][1]
+ if key == "right" or key == "down" then
+ ok = true
+ break
+ end
+ end
+ if ok then
+ local tt = { }
+ for i=1,#vc do
+ local ivc = vc[i]
+ local key = ivc[1]
+ if key == "right" or key == "down" then
+ tt[#tt+1] = { key, ivc[2]*delta }
+ else -- not comment
+ tt[#tt+1] = ivc -- shared since in cache and untouched
+ end
+ end
+ chr.commands = tt
+ else
+ chr.commands = vc
+ end
+ end
+ end
+ tc[k] = chr
+ end
+ -- t.encodingbytes, t.filename, t.fullname, t.name: elsewhere
+ t.size = scaledpoints
+ t.factor = delta
+ if t.fonts then
+ t.fonts = table.fastcopy(t.fonts) -- maybe we virtualize more afterwards
+ end
+ if hasmath then
+ -- mathematics.extras.copy(t) -- can be done elsewhere if needed
+ local ma = tfm.mathactions
+ for i=1,#ma do
+ ma[i](t,tfmtable,delta)
+ end
+ end
+ -- needed for \high cum suis
+ local tpx = tp.x_height
+ if not tp[13] then tp[13] = .86*tpx end -- mathsupdisplay
+ if not tp[14] then tp[14] = .86*tpx end -- mathsupnormal
+ if not tp[15] then tp[15] = .86*tpx end -- mathsupcramped
+ if not tp[16] then tp[16] = .48*tpx end -- mathsubnormal
+ if not tp[17] then tp[17] = .48*tpx end -- mathsubcombined
+ if not tp[22] then tp[22] = 0 end -- mathaxisheight
+ if t.MathConstants then t.MathConstants.AccentBaseHeight = nil end -- safeguard
+--~ print(t.fullname,table.serialize(t.MathConstants),t.parameters.x_height)
+t.tounicode = 1
+ return t, delta
+end
+
+--[[ldx--
+<p>The reason why the scaler is split, is that for a while we experimented
+with a helper function. However, in practice the <l n='api'/> calls are too slow to
+make this profitable and the <l n='lua'/> based variant was just faster. A days
+wasted day but an experience richer.</p>
+--ldx]]--
+
+tfm.auto_cleanup = true
+
+local lastfont = nil
+
+-- we can get rid of the tfm instance when we have fast access to the
+-- scaled character dimensions at the tex end, e.g. a fontobject.width
+--
+-- flushing the kern and ligature tables from memory saves a lot (only
+-- base mode) but it complicates vf building where the new characters
+-- demand this data
+
+--~ for id, f in pairs(fonts.ids) do
+--~ local ffi = font.fonts[id]
+--~ f.characters = ffi.characters
+--~ f.kerns = ffi.kerns
+--~ f.ligatures = ffi.ligatures
+--~ end
+
+function tfm.cleanup_table(tfmdata) -- we need a cleanup callback, now we miss the last one
+ if tfm.auto_cleanup then -- ok, we can hook this into everyshipout or so ... todo
+ if tfmdata.type == 'virtual' or tfmdata.virtualized then
+ for k, v in next, tfmdata.characters do
+ if v.commands then v.commands = nil end
+ end
+ end
+ end
+end
+
+function tfm.cleanup(tfmdata) -- we need a cleanup callback, now we miss the last one
+end
+
+function tfm.scale(tfmtable, scaledpoints)
+ local t, factor = tfm.do_scale(tfmtable, scaledpoints)
+ t.factor = factor
+ t.ascender = factor*(tfmtable.ascender or 0)
+ t.descender = factor*(tfmtable.descender or 0)
+ t.shared = tfmtable.shared or { }
+ t.unique = table.fastcopy(tfmtable.unique or {})
+--~ print("scaling", t.name, t.factor) -- , tfm.hash_features(tfmtable.specification))
+ tfm.cleanup(t)
+ return t
+end
+
+--[[ldx--
+<p>Analyzers run per script and/or language and are needed in order to
+process features right.</p>
+--ldx]]--
+
+fonts.analyzers = fonts.analyzers or { }
+fonts.analyzers.aux = fonts.analyzers.aux or { }
+fonts.analyzers.methods = fonts.analyzers.methods or { }
+fonts.analyzers.initializers = fonts.analyzers.initializers or { }
+
+-- todo: analyzers per script/lang, cross font, so we need an font id hash -> script
+-- e.g. latin -> hyphenate, arab -> 1/2/3 analyze
+
+-- an example analyzer (should move to font-ota.lua)
+
+local state = attributes.private('state')
+
+function fonts.analyzers.aux.setstate(head,font)
+ local tfmdata = fontdata[font]
+ local characters = tfmdata.characters
+ local descriptions = tfmdata.descriptions
+ local first, last, current, n, done = nil, nil, head, 0, false -- maybe make n boolean
+ while current do
+ if current.id == glyph and current.font == font then
+ local d = descriptions[current.char]
+ if d then
+ if d.class == "mark" then
+ done = true
+ set_attribute(current,state,5) -- mark
+ elseif n == 0 then
+ first, last, n = current, current, 1
+ set_attribute(current,state,1) -- init
+ else
+ last, n = current, n+1
+ set_attribute(current,state,2) -- medi
+ end
+ else -- finish
+ if first and first == last then
+ set_attribute(last,state,4) -- isol
+ elseif last then
+ set_attribute(last,state,3) -- fina
+ end
+ first, last, n = nil, nil, 0
+ end
+ else -- finish
+ if first and first == last then
+ set_attribute(last,state,4) -- isol
+ elseif last then
+ set_attribute(last,state,3) -- fina
+ end
+ first, last, n = nil, nil, 0
+ end
+ current = current.next
+ end
+ if first and first == last then
+ set_attribute(last,state,4) -- isol
+ elseif last then
+ set_attribute(last,state,3) -- fina
+ end
+ return head, done
+end
+
+function tfm.replacements(tfm,value)
+ -- tfm.characters[0x0022] = table.fastcopy(tfm.characters[0x201D])
+ -- tfm.characters[0x0027] = table.fastcopy(tfm.characters[0x2019])
+ -- tfm.characters[0x0060] = table.fastcopy(tfm.characters[0x2018])
+ -- tfm.characters[0x0022] = tfm.characters[0x201D]
+ tfm.characters[0x0027] = tfm.characters[0x2019]
+ -- tfm.characters[0x0060] = tfm.characters[0x2018]
+end
+
+-- auto complete font with missing composed characters
+
+table.insert(fonts.manipulators,"compose")
+
+function fonts.initializers.common.compose(tfmdata,value)
+ if value then
+ fonts.vf.aux.compose_characters(tfmdata)
+ end
+end
+
+-- tfm features, experimental
+
+tfm.features = tfm.features or { }
+tfm.features.list = tfm.features.list or { }
+tfm.features.default = tfm.features.default or { }
+
+function tfm.enhance(tfmdata,specification)
+ -- we don't really share tfm data because we always reload
+ -- but this is more in sycn with afm and such
+ local features = (specification.features and specification.features.normal ) or { }
+ tfmdata.shared = tfmdata.shared or { }
+ tfmdata.shared.features = features
+ -- tfmdata.shared.tfmdata = tfmdata -- circular
+tfmdata.filename = specification.name
+ if not features.encoding then
+ local name, size = specification.name, specification.size
+ local encoding, filename = match(name,"^(.-)%-(.*)$") -- context: encoding-name.*
+ if filename and encoding and fonts.enc.known[encoding] then
+ features.encoding = encoding
+ end
+ end
+ tfm.set_features(tfmdata)
+end
+
+function tfm.set_features(tfmdata)
+ -- todo: no local functions
+ local shared = tfmdata.shared
+-- local tfmdata = shared.tfmdata
+ local features = shared.features
+ if not table.is_empty(features) then
+ local mode = tfmdata.mode or fonts.mode
+ local fi = fonts.initializers[mode]
+ if fi and fi.tfm then
+ local function initialize(list) -- using tex lig and kerning
+ if list then
+ for i=1,#list do
+ local f = list[i]
+ local value = features[f]
+ if value and fi.tfm[f] then -- brr
+ if tfm.trace_features then
+ logs.report("define tfm","initializing feature %s to %s for mode %s for font %s",f,tostring(value),mode or 'unknown',tfmdata.name or 'unknown')
+ end
+ fi.tfm[f](tfmdata,value)
+ mode = tfmdata.mode or fonts.mode
+ fi = fonts.initializers[mode]
+ end
+ end
+ end
+ end
+ initialize(fonts.triggers)
+ initialize(tfm.features.list)
+ initialize(fonts.manipulators)
+ end
+ local fm = fonts.methods[mode]
+ if fm and fm.tfm then
+ local function register(list) -- node manipulations
+ if list then
+ for i=1,#list do
+ local f = list[i]
+ if features[f] and fm.tfm[f] then -- brr
+ if not shared.processors then -- maybe also predefine
+ shared.processors = { fm.tfm[f] }
+ else
+ shared.processors[#shared.processors+1] = fm.tfm[f]
+ end
+ end
+ end
+ end
+ end
+ register(tfm.features.list)
+ end
+ end
+end
+
+function tfm.features.register(name,default)
+ tfm.features.list[#tfm.features.list+1] = name
+ tfm.features.default[name] = default
+end
+
+function tfm.reencode(tfmdata,encoding)
+ if encoding and fonts.enc.known[encoding] then
+ local data = fonts.enc.load(encoding)
+ if data then
+ local characters, original, vector = tfmdata.characters, { }, data.vector
+ tfmdata.encoding = encoding -- not needed
+ for k, v in next, characters do
+ v.name, v.index, original[k] = vector[k], k, v
+ end
+ for k,v in next, data.unicodes do
+ if k ~= v then
+ if trace_defining then
+ logs.report("define font","reencoding U+%04X to U+%04X",k,v)
+ end
+ characters[k] = original[v]
+ end
+ end
+ end
+ end
+end
+
+tfm.features.register('reencode')
+
+fonts.initializers.base.tfm.reencode = tfm.reencode
+fonts.initializers.node.tfm.reencode = tfm.reencode
+
+fonts.enc = fonts.enc or { }
+fonts.enc.remappings = fonts.enc.remappings or { }
+
+function tfm.remap(tfmdata,remapping)
+ local vector = remapping and fonts.enc.remappings[remapping]
+ if vector then
+ local characters, original = tfmdata.characters, { }
+ for k, v in next, characters do
+ original[k], characters[k] = v, nil
+ end
+ for k,v in next, vector do
+ if k ~= v then
+ if trace_defining then
+ logs.report("define font","remapping U+%04X to U+%04X",k,v)
+ end
+ local c = original[k]
+ characters[v] = c
+ c.index = k
+ end
+ end
+ tfmdata.encodingbytes = 2
+ tfmdata.format = 'type1'
+ end
+end
+
+tfm.features.register('remap')
+
+fonts.initializers.base.tfm.remap = tfm.remap
+fonts.initializers.node.tfm.remap = tfm.remap
+
+-- status info
+
+statistics.register("fonts load time", function()
+ return format("%s seconds",statistics.elapsedtime(fonts))
+end)
diff --git a/otfl-font-xtx.lua b/otfl-font-xtx.lua
new file mode 100644
index 0000000..5672068
--- /dev/null
+++ b/otfl-font-xtx.lua
@@ -0,0 +1,109 @@
+if not modules then modules = { } end modules ['font-xtx'] = {
+ version = 1.001,
+ comment = "companion to font-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local texsprint, count = tex.sprint, tex.count
+local format, concat, gmatch, match, find, lower = string.format, table.concat, string.gmatch, string.match, string.find, string.lower
+local tostring, next = tostring, next
+
+local trace_defining = false trackers.register("fonts.defining", function(v) trace_defining = v end)
+
+--[[ldx--
+<p>Choosing a font by name and specififying its size is only part of the
+game. In order to prevent complex commands, <l n='xetex'/> introduced
+a method to pass feature information as part of the font name. At the
+risk of introducing nasty parsing and compatinility problems, this
+syntax was expanded over time.</p>
+
+<p>For the sake of users who have defined fonts using that syntax, we
+will support it, but we will provide additional methods as well.
+Normally users will not use this direct way, but use a more abstract
+interface.</p>
+
+<p>The next one is the official one. However, in the plain
+variant we need to support the crappy [] specification as
+well and that does not work too well with the general design
+of the specifier.</p>
+--ldx]]--
+
+--~ function fonts.define.specify.colonized(specification) -- xetex mode
+--~ local list = { }
+--~ if specification.detail and specification.detail ~= "" then
+--~ for v in gmatch(specification.detail,"%s*([^;]+)%s*") do
+--~ local a, b = match(v,"^(%S*)%s*=%s*(%S*)$")
+--~ if a and b then
+--~ list[a] = b:is_boolean()
+--~ if type(list[a]) == "nil" then
+--~ list[a] = b
+--~ end
+--~ else
+--~ local a, b = match(v,"^([%+%-]?)%s*(%S+)$")
+--~ if a and b then
+--~ list[b] = a ~= "-"
+--~ end
+--~ end
+--~ end
+--~ end
+--~ specification.features.normal = list
+--~ return specification
+--~ end
+
+--~ check("oeps/BI:+a;-b;c=d")
+--~ check("[oeps]/BI:+a;-b;c=d")
+--~ check("file:oeps/BI:+a;-b;c=d")
+--~ check("name:oeps/BI:+a;-b;c=d")
+
+local list = { }
+
+fonts.define.specify.colonized_default_lookup = "file"
+
+local function issome() list.lookup = fonts.define.specify.colonized_default_lookup end
+local function isfile() list.lookup = 'file' end
+local function isname() list.lookup = 'name' end
+local function thename(s) list.name = s end
+local function iscrap(s) list.crap = string.lower(s) end
+local function istrue(s) list[s] = 'yes' end
+local function isfalse(s) list[s] = 'no' end
+local function iskey(k,v) list[k] = v end
+
+local spaces = lpeg.P(" ")^0
+local namespec = (1-lpeg.S("/: "))^0
+local crapspec = spaces * lpeg.P("/") * (((1-lpeg.P(":"))^0)/iscrap) * spaces
+local filename = (lpeg.P("file:")/isfile * (namespec/thename)) + (lpeg.P("[") * lpeg.P(true)/isname * (((1-lpeg.P("]"))^0)/thename) * lpeg.P("]"))
+local fontname = (lpeg.P("name:")/isname * (namespec/thename)) + lpeg.P(true)/issome * (namespec/thename)
+local sometext = (lpeg.R("az") + lpeg.R("AZ") + lpeg.R("09"))^1
+local truevalue = lpeg.P("+") * spaces * (sometext/istrue)
+local falsevalue = lpeg.P("-") * spaces * (sometext/isfalse)
+local keyvalue = (lpeg.C(sometext) * spaces * lpeg.P("=") * spaces * lpeg.C(sometext))/iskey
+local somevalue = sometext/istrue
+local option = spaces * (keyvalue + falsevalue + truevalue + somevalue) * spaces
+local options = lpeg.P(":") * spaces * (lpeg.P(";")^0 * option)^0
+local pattern = (filename + fontname) * crapspec^0 * options^0
+
+function fonts.define.specify.colonized(specification) -- xetex mode
+ list = { }
+ pattern:match(specification.specification)
+ for k, v in next, list do
+ list[k] = v:is_boolean()
+ if type(list[a]) == "nil" then
+ list[k] = v
+ end
+ end
+ list.crap = nil -- style not supported, maybe some day
+ if list.name then
+ specification.name = list.name
+ list.name = nil
+ end
+ if list.lookup then
+ specification.lookup = list.lookup
+ list.lookup = nil
+ end
+ specification.features.normal = list
+ return specification
+end
+
+fonts.define.register_split(":", fonts.define.specify.colonized)
diff --git a/otfl-luat-con.lua b/otfl-luat-con.lua
new file mode 100644
index 0000000..e93e920
--- /dev/null
+++ b/otfl-luat-con.lua
@@ -0,0 +1,118 @@
+if not modules then modules = { } end modules ['luat-loc'] = {
+ version = 1.001,
+ comment = "companion to luat-lib.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local format, lower, gsub = string.format, string.lower, string.gsub
+
+local trace_cache = false trackers.register("input.cache", function(v) trace_cache = v end)
+local trace_containers = false trackers.register("input.containers", function(v) trace_containers = v end)
+local trace_storage = false trackers.register("input.storage", function(v) trace_storage = v end)
+local trace_verbose = false trackers.register("input.verbose", function(v) trace_verbose = v end)
+local trace_locating = false trackers.register("input.locating", function(v) trace_locating = v trace_verbose = v end)
+
+--[[ldx--
+<p>Once we found ourselves defining similar cache constructs
+several times, containers were introduced. Containers are used
+to collect tables in memory and reuse them when possible based
+on (unique) hashes (to be provided by the calling function).</p>
+
+<p>Caching to disk is disabled by default. Version numbers are
+stored in the saved table which makes it possible to change the
+table structures without bothering about the disk cache.</p>
+
+<p>Examples of usage can be found in the font related code.</p>
+--ldx]]--
+
+containers = containers or { }
+
+containers.usecache = true
+
+local function report(container,tag,name)
+ if trace_cache or trace_containers then
+ logs.report(format("%s cache",container.subcategory),"%s: %s",tag,name or 'invalid')
+ end
+end
+
+local allocated = { }
+
+-- tracing
+
+function containers.define(category, subcategory, version, enabled)
+ return function()
+ if category and subcategory then
+ local c = allocated[category]
+ if not c then
+ c = { }
+ allocated[category] = c
+ end
+ local s = c[subcategory]
+ if not s then
+ s = {
+ category = category,
+ subcategory = subcategory,
+ storage = { },
+ enabled = enabled,
+ version = version or 1.000,
+ trace = false,
+ path = caches and caches.setpath(category,subcategory),
+ }
+ c[subcategory] = s
+ end
+ return s
+ else
+ return nil
+ end
+ end
+end
+
+function containers.is_usable(container, name)
+ return container.enabled and caches and caches.is_writable(container.path, name)
+end
+
+function containers.is_valid(container, name)
+ if name and name ~= "" then
+ local storage = container.storage[name]
+ return storage and not table.is_empty(storage) and storage.cache_version == container.version
+ else
+ return false
+ end
+end
+
+function containers.read(container,name)
+ if container.enabled and caches and not container.storage[name] and containers.usecache then
+ container.storage[name] = caches.loaddata(container.path,name)
+ if containers.is_valid(container,name) then
+ report(container,"loaded",name)
+ else
+ container.storage[name] = nil
+ end
+ end
+ if container.storage[name] then
+ report(container,"reusing",name)
+ end
+ return container.storage[name]
+end
+
+function containers.write(container, name, data)
+ if data then
+ data.cache_version = container.version
+ if container.enabled and caches then
+ local unique, shared = data.unique, data.shared
+ data.unique, data.shared = nil, nil
+ caches.savedata(container.path, name, data)
+ report(container,"saved",name)
+ data.unique, data.shared = unique, shared
+ end
+ report(container,"stored",name)
+ container.storage[name] = data
+ end
+ return data
+end
+
+function containers.content(container,name)
+ return container.storage[name]
+end
diff --git a/otfl-luat-dum.lua b/otfl-luat-dum.lua
new file mode 100644
index 0000000..7b959ca
--- /dev/null
+++ b/otfl-luat-dum.lua
@@ -0,0 +1,58 @@
+if not modules then modules = { } end modules ['luat-dum'] = {
+ version = 1.001,
+ comment = "companion to luatex-*.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local dummyfunction = function() end
+
+statistics = {
+ register = dummyfunction,
+ starttiming = dummyfunction,
+ stoptiming = dummyfunction,
+}
+trackers = {
+ register = dummyfunction,
+ enable = dummyfunction,
+ disable = dummyfunction,
+}
+storage = {
+ register = dummyfunction,
+}
+logs = {
+ report = dummyfunction,
+ simple = dummyfunction,
+}
+tasks = {
+ new = dummyfunction,
+ actions = dummyfunction,
+ appendaction = dummyfunction,
+ prependaction = dummyfunction,
+}
+
+
+-- we need to cheat a bit here
+
+texconfig.kpse_init = true
+
+input = { } -- no fancy file helpers used
+
+local remapper = {
+ otf = "opentype fonts",
+ ttf = "truetype fonts",
+ ttc = "truetype fonts"
+}
+
+function input.find_file(name,kind)
+ name = name:gsub("\\","\/")
+ return kpse.find_file(name,(kind ~= "" and kind) or "tex")
+end
+
+function input.findbinfile(name,kind)
+ if not kind or kind == "" then
+ kind = string.match(name,"%.(.-)$")
+ end
+ return input.find_file(name,kind and remapper[kind])
+end
diff --git a/otfl-node-dum.lua b/otfl-node-dum.lua
new file mode 100644
index 0000000..274e0cd
--- /dev/null
+++ b/otfl-node-dum.lua
@@ -0,0 +1,24 @@
+if not modules then modules = { } end modules ['node-dum'] = {
+ version = 1.001,
+ comment = "companion to luatex-*.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+nodes = nodes or { }
+
+function nodes.simple_font_dummy(head,tail)
+ return tail
+end
+
+function nodes.simple_font_handler(head)
+ local tail = node.slide(head)
+-- lang.hyphenate(head,tail)
+ head = nodes.process_characters(head,tail)
+ nodes.inject_kerns(head)
+ nodes.protect_glyphs(head)
+ tail = node.ligaturing(head,tail)
+ tail = node.kerning(head,tail)
+ return head
+end
diff --git a/otfl-node-fnt.lua b/otfl-node-fnt.lua
new file mode 100644
index 0000000..52b5a24
--- /dev/null
+++ b/otfl-node-fnt.lua
@@ -0,0 +1,194 @@
+if not modules then modules = { } end modules ['node-fnt'] = {
+ version = 1.001,
+ comment = "companion to font-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local next, type = next, type
+
+local trace_characters = false trackers.register("nodes.characters", function(v) trace_characters = v end)
+
+local glyph = node.id('glyph')
+
+local traverse_id = node.traverse_id
+local has_attribute = node.has_attribute
+
+local starttiming, stoptiming = statistics.starttiming, statistics.stoptiming
+
+fonts = fonts or { }
+fonts.tfm = fonts.tfm or { }
+fonts.ids = fonts.ids or { }
+
+local fontdata = fonts.ids
+
+-- some tests with using an array of dynamics[id] and processes[id] demonstrated
+-- that there was nothing to gain (unless we also optimize other parts)
+--
+-- maybe getting rid of the intermediate shared can save some time
+
+-- potential speedup: check for subtype < 256 so that we can remove that test
+-- elsewhere, danger: injected nodes will not be dealt with but that does not
+-- happen often; we could consider processing sublists but that might need mor
+-- checking later on; the current approach also permits variants
+
+function nodes.process_characters(head)
+ -- either next or not, but definitely no already processed list
+ starttiming(nodes)
+ local usedfonts, attrfonts, done = { }, { }, false
+ local a, u, prevfont, prevattr = 0, 0, nil, 0
+ for n in traverse_id(glyph,head) do
+ local font, attr = n.font, has_attribute(n,0) -- zero attribute is reserved for fonts, preset to 0 is faster (first match)
+ if attr and attr > 0 then
+ if font ~= prevfont or attr ~= prevattr then
+ local used = attrfonts[font]
+ if not used then
+ used = { }
+ attrfonts[font] = used
+ end
+ if not used[attr] then
+ -- we do some testing outside the function
+ local tfmdata = fontdata[font]
+ local shared = tfmdata.shared
+ if shared then
+ local dynamics = shared.dynamics
+ if dynamics then
+ local d = shared.set_dynamics(font,dynamics,attr)
+ if d then
+ used[attr] = d
+ a = a + 1
+ end
+ end
+ end
+ end
+ prevfont, prevattr = font, attr
+ end
+ elseif font ~= prevfont then
+ prevfont, prevattr = font, 0
+ local used = usedfonts[font]
+ if not used then
+ local tfmdata = fontdata[font]
+ if tfmdata then
+ local shared = tfmdata.shared -- we need to check shared, only when same features
+ if shared then
+ local processors = shared.processes
+ if processors and #processors > 0 then
+ usedfonts[font] = processors
+ u = u + 1
+ end
+ end
+ else
+ -- probably nullfont
+ end
+ end
+ else
+ prevattr = attr
+ end
+ end
+ -- we could combine these and just make the attribute nil
+ if u == 1 then
+ local font, processors = next(usedfonts)
+ local n = #processors
+ if n > 0 then
+ local h, d = processors[1](head,font,false)
+ head, done = h or head, done or d
+ if n > 1 then
+ for i=2,n do
+ local h, d = processors[i](head,font,false)
+ head, done = h or head, done or d
+ end
+ end
+ end
+ elseif u > 0 then
+ for font, processors in next, usedfonts do
+ local n = #processors
+ local h, d = processors[1](head,font,false)
+ head, done = h or head, done or d
+ if n > 1 then
+ for i=2,n do
+ local h, d = processors[i](head,font,false)
+ head, done = h or head, done or d
+ end
+ end
+ end
+ end
+ if a == 1 then
+ local font, dynamics = next(attrfonts)
+ for attribute, processors in next, dynamics do -- attr can switch in between
+ local n = #processors
+ local h, d = processors[1](head,font,attribute)
+ head, done = h or head, done or d
+ if n > 1 then
+ for i=2,n do
+ local h, d = processors[i](head,font,attribute)
+ head, done = h or head, done or d
+ end
+ end
+ end
+ elseif a > 0 then
+ for font, dynamics in next, attrfonts do
+ for attribute, processors in next, dynamics do -- attr can switch in between
+ local n = #processors
+ local h, d = processors[1](head,font,attribute)
+ head, done = h or head, done or d
+ if n > 1 then
+ for i=2,n do
+ local h, d = processors[i](head,font,attribute)
+ head, done = h or head, done or d
+ end
+ end
+ end
+ end
+ end
+ stoptiming(nodes)
+ if trace_characters then
+ nodes.report(head,done)
+ end
+ return head, true
+end
+
+if node.protect_glyphs then
+
+ nodes.protect_glyphs = node.protect_glyphs
+ nodes.unprotect_glyphs = node.unprotect_glyphs
+
+else do
+
+ -- initial value subtype : X000 0001 = 1 = 0x01 = char
+ --
+ -- expected before linebreak : X000 0000 = 0 = 0x00 = glyph
+ -- X000 0010 = 2 = 0x02 = ligature
+ -- X000 0100 = 4 = 0x04 = ghost
+ -- X000 1010 = 10 = 0x0A = leftboundary lig
+ -- X001 0010 = 18 = 0x12 = rightboundary lig
+ -- X001 1010 = 26 = 0x1A = both boundaries lig
+ -- X000 1100 = 12 = 0x1C = leftghost
+ -- X001 0100 = 20 = 0x14 = rightghost
+
+
+ function nodes.protect_glyphs(head)
+ local done = false
+ for g in traverse_id(glyph,head) do
+ local s = g.subtype
+ if s == 1 then
+ done, g.subtype = true, 256
+ elseif s <= 256 then
+ done, g.subtype = true, 256 + s
+ end
+ end
+ return done
+ end
+
+ function nodes.unprotect_glyphs(head)
+ local done = false
+ for g in traverse_id(glyph,head) do
+ local s = g.subtype
+ if s > 256 then
+ done, g.subtype = true, s - 256
+ end
+ end
+ return done
+ end
+
+end end
diff --git a/otfl-node-ini.lua b/otfl-node-ini.lua
new file mode 100644
index 0000000..563260d
--- /dev/null
+++ b/otfl-node-ini.lua
@@ -0,0 +1,214 @@
+if not modules then modules = { } end modules ['node-ini'] = {
+ version = 1.001,
+ comment = "companion to node-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+--[[ldx--
+<p>Most of the code that had accumulated here is now separated in
+modules.</p>
+--ldx]]--
+
+-- this module is being reconstructed
+
+local utf = unicode.utf8
+local next, type = next, type
+local format, concat, match, utfchar = string.format, table.concat, string.match, utf.char
+
+local chardata = characters and characters.data
+
+--[[ldx--
+<p>We start with a registration system for atributes so that we can use the
+symbolic names later on.</p>
+--ldx]]--
+
+attributes = attributes or { }
+
+attributes.names = attributes.names or { }
+attributes.numbers = attributes.numbers or { }
+attributes.list = attributes.list or { }
+attributes.unsetvalue = -0x7FFFFFFF
+
+storage.register(false, "attributes/names", attributes.names, "attributes.names")
+storage.register(false, "attributes/numbers", attributes.numbers, "attributes.numbers")
+storage.register(false, "attributes/list", attributes.list, "attributes.list")
+
+local names, numbers, list = attributes.names, attributes.numbers, attributes.list
+
+function attributes.define(name,number) -- at the tex end
+ if not numbers[name] then
+ numbers[name], names[number], list[number] = number, name, { }
+ end
+end
+
+--[[ldx--
+<p>We can use the attributes in the range 127-255 (outside user space). These
+are only used when no attribute is set at the \TEX\ end which normally
+happens in <l n='context'/>.</p>
+--ldx]]--
+
+local last = 127
+
+function attributes.private(name) -- at the lua end (hidden from user)
+ local number = numbers[name]
+ if not number then
+ if last < 255 then
+ last = last + 1
+ end
+ number = last
+ numbers[name], names[number], list[number] = number, name, { }
+ end
+ return number
+end
+
+--[[ldx--
+<p>Access to nodes is what gives <l n='luatex'/> its power. Here we
+implement a few helper functions. These functions are rather optimized.</p>
+--ldx]]--
+
+--[[ldx--
+<p>When manipulating node lists in <l n='context'/>, we will remove
+nodes and insert new ones. While node access was implemented, we did
+quite some experiments in order to find out if manipulating nodes
+in <l n='lua'/> was feasible from the perspective of performance.</p>
+
+<p>First of all, we noticed that the bottleneck is more with excessive
+callbacks (some gets called very often) and the conversion from and to
+<l n='tex'/>'s datastructures. However, at the <l n='lua'/> end, we
+found that inserting and deleting nodes in a table could become a
+bottleneck.</p>
+
+<p>This resulted in two special situations in passing nodes back to
+<l n='tex'/>: a table entry with value <type>false</type> is ignored,
+and when instead of a table <type>true</type> is returned, the
+original table is used.</p>
+
+<p>Insertion is handled (at least in <l n='context'/> as follows. When
+we need to insert a node at a certain position, we change the node at
+that position by a dummy node, tagged <type>inline</type> which itself
+has_attribute the original node and one or more new nodes. Before we pass
+back the list we collapse the list. Of course collapsing could be built
+into the <l n='tex'/> engine, but this is a not so natural extension.</p>
+
+<p>When we collapse (something that we only do when really needed), we
+also ignore the empty nodes. [This is obsolete!]</p>
+--ldx]]--
+
+nodes = nodes or { }
+
+local hlist = node.id('hlist')
+local vlist = node.id('vlist')
+local glyph = node.id('glyph')
+local glue = node.id('glue')
+local penalty = node.id('penalty')
+local kern = node.id('kern')
+local whatsit = node.id('whatsit')
+
+local traverse_id = node.traverse_id
+local traverse = node.traverse
+local slide_nodes = node.slide
+local free_node = node.free
+local remove_node = node.remove
+
+function nodes.remove(head, current, free_too)
+ local t = current
+ head, current = remove_node(head,current)
+ if t then
+ if free_too then
+ free_node(t)
+ t = nil
+ else
+ t.next, t.prev = nil, nil
+ end
+ end
+ return head, current, t
+end
+
+function nodes.delete(head,current)
+ return nodes.remove(head,current,true)
+end
+
+nodes.before = node.insert_before -- broken
+nodes.after = node.insert_after
+
+-- we need to test this, as it might be fixed
+
+function nodes.before(h,c,n)
+ if c then
+ if c == h then
+ n.next = h
+ n.prev = nil
+ h.prev = n
+ else
+ local cp = c.prev
+ n.next = c
+ n.prev = cp
+ if cp then
+ cp.next = n
+ end
+ c.prev = n
+ return h, n
+ end
+ end
+ return n, n
+end
+
+function nodes.after(h,c,n)
+ if c then
+ local cn = c.next
+ if cn then
+ n.next = cn
+ cn.prev = n
+ else
+ n.next = nil
+ end
+ c.next = n
+ n.prev = c
+ return h, n
+ end
+ return n, n
+end
+
+-- will move
+
+local function count(stack,flat)
+ local n = 0
+ while stack do
+ local id = stack.id
+ if not flat and id == hlist or id == vlist then
+ local list = stack.list
+ if list then
+ n = n + 1 + count(list) -- self counts too
+ else
+ n = n + 1
+ end
+ else
+ n = n + 1
+ end
+ stack = stack.next
+ end
+ return n
+end
+
+nodes.count = count
+
+-- new
+
+function attributes.ofnode(n)
+ local a = n.attr
+ if a then
+ local names = attributes.names
+ a = a.next
+ while a do
+ local number, value = a.number, a.value
+ texio.write_nl(format("%s : attribute %3i, value %4i, name %s",tostring(n),number,value,names[number] or '?'))
+ a = a.next
+ end
+ end
+end
+
+local left, space = lpeg.P("<"), lpeg.P(" ")
+
+nodes.filterkey = left * (1-left)^0 * left * space^0 * lpeg.C((1-space)^0)
diff --git a/otfl-node-inj.lua b/otfl-node-inj.lua
new file mode 100644
index 0000000..6fd93fa
--- /dev/null
+++ b/otfl-node-inj.lua
@@ -0,0 +1,606 @@
+if not modules then modules = { } end modules ['node-inj'] = {
+ version = 1.001,
+ comment = "companion to node-ini.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+-- tricky ... fonts.ids is not yet defined .. to be solved (maybe general tex ini)
+
+-- This is very experimental (this will change when we have luatex > .50 and
+-- a few pending thingies are available. Also, Idris needs to make a few more
+-- test fonts.
+
+local next = next
+
+local trace_injections = false trackers.register("nodes.injections", function(v) trace_injections = v end)
+
+fonts = fonts or { }
+fonts.tfm = fonts.tfm or { }
+fonts.ids = fonts.ids or { }
+
+local fontdata = fonts.ids
+
+local glyph = node.id('glyph')
+local kern = node.id('kern')
+
+local traverse_id = node.traverse_id
+local has_attribute = node.has_attribute
+local set_attribute = node.set_attribute
+local insert_node_before = node.insert_before
+local insert_node_after = node.insert_after
+
+local newkern = nodes.kern
+
+local markbase = attributes.private('markbase')
+local markmark = attributes.private('markmark')
+local markdone = attributes.private('markdone')
+local cursbase = attributes.private('cursbase')
+local curscurs = attributes.private('curscurs')
+local cursdone = attributes.private('cursdone')
+local kernpair = attributes.private('kernpair')
+
+local cursives = { }
+local marks = { }
+local kerns = { }
+
+-- currently we do gpos/kern in a bit inofficial way but when we
+-- have the extra fields in glyphnodes to manipulate ht/dp/wd
+-- explicitly i will provide an alternative; also, we can share
+-- tables
+
+function nodes.set_cursive(start,nxt,factor,rlmode,exit,entry,tfmstart,tfmnext)
+ local dx, dy = factor*(exit[1]-entry[1]), factor*(exit[2]-entry[2])
+ local ws, wn = tfmstart.width, tfmnext.width
+ local bound = #cursives + 1
+ set_attribute(start,cursbase,bound)
+ set_attribute(nxt,curscurs,bound)
+ cursives[bound] = { rlmode, dx, dy, ws, wn }
+ return dx, dy, bound
+end
+
+function nodes.set_pair(current,factor,rlmode,spec,tfmchr)
+ local x, y, w, h = factor*spec[1], factor*spec[2], factor*spec[3], factor*spec[4]
+ -- dy = y - h
+ if x ~= 0 or w ~= 0 or y ~= 0 or h ~= 0 then
+ local bound = has_attribute(current,kernpair)
+ if bound then
+ local kb = kerns[bound]
+ kb[2], kb[3], kb[4], kb[5] = kb[2] + x, kb[3] + y, kb[4] + w, kb[5] + h
+ else
+ bound = #kerns + 1
+ set_attribute(current,kernpair,bound)
+ kerns[bound] = { rlmode, x, y, w, h }
+ end
+ return x, y, w, h, bound
+ end
+ return x, y, w, h -- no bound
+end
+
+function nodes.set_kern(current,factor,rlmode,x,tfmchr)
+ local dx = factor*x
+ if dx ~= 0 then
+ local bound = #kerns + 1
+ set_attribute(current,kernpair,bound)
+ kerns[bound] = { rlmode, dx }
+ end
+ return dx, bound
+end
+
+function nodes.set_mark(start,base,factor,rlmode,ba,ma,index) --ba=baseanchor, ma=markanchor
+ local dx, dy = factor*(ba[1]-ma[1]), factor*(ba[2]-ma[2])
+ local bound = has_attribute(base,markbase)
+ if bound then
+ local mb = marks[bound]
+ if mb then
+ if not index then index = #mb + 1 end
+ mb[index] = { dx, dy }
+ set_attribute(start,markmark,bound)
+ set_attribute(start,markdone,index)
+ return dx, dy, bound
+ else
+ logs.report("nodes mark", "possible problem, U+%04X is base without data (id: %s)",base.char,bound)
+ end
+ end
+ index = index or 1
+ bound = #marks + 1
+ set_attribute(base,markbase,bound)
+ set_attribute(start,markmark,bound)
+ set_attribute(start,markdone,index)
+ marks[bound] = { [index] = { dx, dy } }
+ return dx, dy, bound
+end
+
+function nodes.trace_injection(head)
+ local function dir(n)
+ return (n<0 and "r-to-l") or (n>0 and "l-to-r") or ("unset")
+ end
+ local function report(...)
+ logs.report("nodes finisher",...)
+ end
+ report("begin run")
+ for n in traverse_id(glyph,head) do
+ if n.subtype < 256 then
+ local kp = has_attribute(n,kernpair)
+ local mb = has_attribute(n,markbase)
+ local mm = has_attribute(n,markmark)
+ local md = has_attribute(n,markdone)
+ local cb = has_attribute(n,cursbase)
+ local cc = has_attribute(n,curscurs)
+ report("char U+%05X, font=%s",n.char,n.font)
+ if kp then
+ local k = kerns[kp]
+ if k[3] then
+ report(" pairkern: dir=%s, x=%s, y=%s, w=%s, h=%s",dir(k[1]),k[2],k[3],k[4],k[5])
+ else
+ report(" kern: dir=%s, dx=%s",dir(k[1]),k[2])
+ end
+ end
+ if mb then
+ report(" markbase: bound=%s",mb)
+ end
+ if mm then
+ local m = marks[mm]
+ if mb then
+ local m = m[mb]
+ if m then
+ report(" markmark: bound=%s, index=%s, dx=%s, dy=%s",mm,j,m[1],m[2])
+ else
+ report(" markmark: bound=%s, missing index",mm)
+ end
+ else
+ m = m[1]
+ report(" markmark: bound=%s, dx=%s, dy=%s",mm,m[1],m[2])
+ end
+ end
+ if cb then
+ report(" cursbase: bound=%s",cb)
+ end
+ if cc then
+ local c = cursives[cc]
+ report(" curscurs: bound=%s, dir=%s, dx=%s, dy=%s",cc,dir(c[1]),c[2],c[3])
+ end
+ end
+ end
+ report("end run")
+end
+
+function nodes.inject_kerns(head,tail,keep)
+ if trace_injections then
+ nodes.trace_injection(head)
+ end
+ local has_marks, has_cursives, has_kerns = next(marks), next(cursives), next(kerns)
+ if has_marks or has_cursives then
+ -- in the future variant we will not copy items but refs to tables
+ local done, ky, rl, valid, cx, wx = false, { }, { }, { }, { }, { }
+ for n in traverse_id(glyph,head) do
+ if n.subtype < 256 then
+ valid[#valid+1] = n
+ if has_kerns then -- move outside loop
+ local k = has_attribute(n,kernpair)
+ if k then
+ local kk = kerns[k]
+ if kk then
+ local x, y, w, h = kk[2], kk[3], kk[4], kk[5]
+ local dy = y - h
+ if dy ~= 0 then
+ ky[n] = dy
+ end
+ if w ~= 0 or x ~= 0 then
+ wx[n] = kk
+ end
+ rl[n] = kk[1] -- could move in test
+ end
+ end
+ end
+ end
+ end
+ if #valid > 0 then
+ -- we can assume done == true because we have cursives and marks
+ local cx = { }
+ if has_kerns and next(ky) then
+ for n, k in next, ky do
+ n.yoffset = k
+ end
+ end
+ -- todo: reuse t and use maxt
+ if has_cursives then
+ local n_cursbase, n_curscurs, p_cursbase, n, p, nf, tm = nil, nil, nil, nil, nil, nil, nil
+ -- since we need valid[n+1] we can also use a "while true do"
+ local t, d, maxt = { }, { }, 0
+ for i=1,#valid do -- valid == glyphs
+ n = valid[i]
+ if n.font ~= nf then
+ nf = n.font
+ tm = fontdata[nf].marks
+ -- maybe flush
+ maxt = 0
+ end
+ if not tm[n.char] then
+ n_cursbase = has_attribute(n,cursbase)
+ n_curscurs = has_attribute(n,curscurs)
+ if p_cursbase then
+ if p_cursbase == n_curscurs then
+ local c = cursives[n_curscurs]
+ if c then
+ local rlmode, dx, dy, ws, wn = c[1], c[2], c[3], c[4], c[5]
+ if rlmode >= 0 then
+ dx = dx - ws
+ else
+ dx = dx + wn
+ end
+ if dx ~= 0 then
+ cx[n] = dx
+ rl[n] = rlmode
+ end
+ -- if rlmode and rlmode < 0 then
+ dy = -dy
+ -- end
+ maxt = maxt + 1
+ t[maxt] = p
+ d[maxt] = dy
+ else
+ maxt = 0
+ end
+ end
+ elseif maxt > 0 then
+ local ny = n.yoffset
+ for i=maxt,1,-1 do
+ ny = ny + d[i]
+ t[i].yoffset = t[i].yoffset + ny
+ end
+ maxt = 0
+ end
+ if not n_cursbase and maxt > 0 then
+ local ny = n.yoffset
+ for i=maxt,1,-1 do
+ ny = ny + d[i]
+ t[i].yoffset = ny
+ end
+ maxt = 0
+ end
+ p_cursbase, p = n_cursbase, n
+ end
+ end
+ if maxt > 0 then
+ local ny = n.yoffset
+ for i=maxt,1,-1 do
+ ny = ny + d[i]
+ t[i].yoffset = ny
+ end
+ maxt = 0
+ end
+ if not keep then
+ cursives = { }
+ end
+ end
+ if has_marks then
+ local p_markbase, n_markmark = nil, nil
+ for i=1,#valid do
+ local p = valid[i]
+ p_markbase = has_attribute(p,markbase)
+ if p_markbase then
+ local mrks = marks[p_markbase]
+ for n in traverse_id(glyph,p.next) do
+ n_markmark = has_attribute(n,markmark)
+ if p_markbase == n_markmark then
+ local index = has_attribute(n,markdone) or 1
+ local d = mrks[index]
+ if d then
+ -- local rlmode = d[3] -- not used
+ -- if rlmode and rlmode < 0 then
+ -- n.xoffset = p.xoffset + d[1]
+ -- else
+ n.xoffset = p.xoffset - d[1]
+ -- end
+ n.yoffset = p.yoffset + d[2]
+ end
+ else
+ break
+ end
+ end
+ end
+ end
+ if not keep then
+ marks = { }
+ end
+ end
+ -- todo : combine
+ if next(wx) then
+ for n, k in next, wx do
+ -- only w can be nil, can be sped up when w == nil
+ local rl, x, w = k[1], k[2] or 0, k[4] or 0
+ local wx = w - x
+ if rl < 0 then
+ if wx ~= 0 then
+ insert_node_before(head,n,newkern(wx))
+ end
+ if x ~= 0 then
+ insert_node_after (head,n,newkern(x))
+ end
+ else
+ -- if wx ~= 0 then
+ -- insert_node_after(head,n,newkern(wx))
+ -- end
+ if x ~= 0 then
+ insert_node_before(head,n,newkern(x))
+ end
+ end
+ end
+ end
+ if next(cx) then
+ for n, k in next, cx do
+ if k ~= 0 then
+ local rln = rl[n]
+ if rln and rln < 0 then
+ insert_node_before(head,n,newkern(-k))
+ else
+ insert_node_before(head,n,newkern(k))
+ end
+ end
+ end
+ end
+ if not keep then
+ kerns = { }
+ end
+ return head, true
+ elseif not keep then
+ kerns, cursives, marks = { }, { }, { }
+ end
+ elseif has_kerns then
+ -- we assume done is true because there are kerns
+ for n in traverse_id(glyph,head) do
+ local k = has_attribute(n,kernpair)
+ if k then
+ local kk = kerns[k]
+ if kk then
+ -- only w can be nil, can be sped up when w == nil
+ local rl, x, y, w = kk[1], kk[2] or 0, kk[3] or 0, kk[4] or 0
+ if y ~= 0 then
+ n.yoffset = y -- todo: h ?
+ end
+ local wx = w - x
+ if rl < 0 then
+ if wx ~= 0 then
+ insert_node_before(head,n,newkern(wx))
+ end
+ if x ~= 0 then
+ insert_node_after (head,n,newkern(x))
+ end
+ else
+ -- if wx ~= 0 then
+ -- insert_node_after(head,n,newkern(wx))
+ -- end
+ if x ~= 0 then
+ insert_node_before(head,n,newkern(x))
+ end
+ end
+ end
+ end
+ end
+ if not keep then
+ kerns = { }
+ end
+ return head, true
+ end
+ return head, false
+end
+
+-- -- -- KEEP OLD ONE, THE NEXT IS JUST OPTIMIZED -- -- --
+
+function nodes.XXXXXXXxinject_kerns(head,tail,keep)
+ if trace_injections then
+ nodes.trace_injection(head)
+ end
+ local has_marks, has_cursives, has_kerns = next(marks), next(cursives), next(kerns)
+ if has_marks or has_cursives then
+ -- in the future variant we will not copy items but refs to tables
+ local done, ky, valid, cx, wx = false, { }, { }, { }, { }
+ for n in traverse_id(glyph,head) do
+ if n.subtype < 256 then
+ valid[#valid+1] = n
+ if has_kerns then -- move outside loop
+ local k = has_attribute(n,kernpair)
+ if k then
+ local kk = kerns[k]
+ if kk then
+ local x, y, w, h = kk[2], kk[3], kk[4], kk[5]
+ local dy = y - h
+ if dy ~= 0 then
+ ky[n] = dy
+ end
+ if w ~= 0 or x ~= 0 then
+ wx[n] = kk
+ end
+ end
+ end
+ end
+ end
+ end
+ if #valid > 0 then
+ -- we can assume done == true because we have cursives and marks
+ local cx = { }
+ if has_kerns and next(ky) then
+ for n, k in next, ky do
+ n.yoffset = k
+ end
+ end
+ -- todo: reuse t and use maxt
+ if has_cursives then
+ local n_cursbase, n_curscurs, p_cursbase, n, p, nf, tm = nil, nil, nil, nil, nil, nil, nil
+ -- since we need valid[n+1] we can also use a "while true do"
+ local t, d, maxt = { }, { }, 0
+ for i=1,#valid do -- valid == glyphs
+ n = valid[i]
+ if n.font ~= nf then
+ nf = n.font
+ tm = fontdata[nf].marks
+ -- maybe flush
+ maxt = 0
+ end
+ if not tm[n.char] then
+ n_cursbase = has_attribute(n,cursbase)
+ n_curscurs = has_attribute(n,curscurs)
+ if p_cursbase then
+ if p_cursbase == n_curscurs then
+ local c = cursives[n_curscurs]
+ if c then
+ local rlmode, dx, dy, ws, wn = c[1], c[2], c[3], c[4], c[5]
+ if rlmode >= 0 then
+ dx = dx - ws
+ else
+ dx = dx + wn
+ end
+ if dx ~= 0 then
+if rlmode < 0 then
+ cx[n] = -dx
+else
+ cx[n] = dx
+end
+ end
+ -- if rlmode and rlmode < 0 then
+ dy = -dy
+ -- end
+ maxt = maxt + 1
+ t[maxt] = p
+ d[maxt] = dy
+ else
+ maxt = 0
+ end
+ end
+ elseif maxt > 0 then
+ local ny = n.yoffset
+ for i=maxt,1,-1 do
+ ny = ny + d[i]
+ t[i].yoffset = t[i].yoffset + ny
+ end
+ maxt = 0
+ end
+ if not n_cursbase and maxt > 0 then
+ local ny = n.yoffset
+ for i=maxt,1,-1 do
+ ny = ny + d[i]
+ t[i].yoffset = ny
+ end
+ maxt = 0
+ end
+ p_cursbase, p = n_cursbase, n
+ end
+ end
+ if maxt > 0 then
+ local ny = n.yoffset
+ for i=maxt,1,-1 do
+ ny = ny + d[i]
+ t[i].yoffset = ny
+ end
+ maxt = 0
+ end
+ if not keep then
+ cursives = { }
+ end
+ end
+ if has_marks then
+ local p_markbase, n_markmark = nil, nil
+ for i=1,#valid do
+ local p = valid[i]
+ p_markbase = has_attribute(p,markbase)
+ if p_markbase then
+ local mrks = marks[p_markbase]
+ for n in traverse_id(glyph,p.next) do
+ n_markmark = has_attribute(n,markmark)
+ if p_markbase == n_markmark then
+ local index = has_attribute(n,markdone) or 1
+ local d = mrks[index]
+ if d then
+ local d1, d2 = d[1], d[2]
+ if d1 ~= 0 then
+ n.xoffset = p.xoffset - d[1]
+ end
+ if d2 ~= 0 then
+ n.yoffset = p.yoffset + d[2]
+ end
+ end
+ else
+ break
+ end
+ end
+ end
+ end
+ if not keep then
+ marks = { }
+ end
+ end
+ -- todo : combine
+ if next(wx) then
+ for n, k in next, wx do
+ -- only w can be nil, can be sped up when w == nil
+ local rl, x, w = k[1], k[2] or 0, k[4] or 0
+ local wx = w - x
+ if rl < 0 then
+ if wx ~= 0 then
+ insert_node_before(head,n,newkern(wx))
+ end
+ if x ~= 0 then
+ insert_node_after (head,n,newkern(x))
+ end
+ else
+ -- if wx ~= 0 then
+ -- insert_node_after(head,n,newkern(wx))
+ -- end
+ if x ~= 0 then
+ insert_node_before(head,n,newkern(x))
+ end
+ end
+ end
+ end
+ if next(cx) then
+ for n, k in next, cx do
+ insert_node_before(head,n,newkern(k))
+ end
+ end
+ if not keep then
+ kerns = { }
+ end
+ return head, true
+ elseif not keep then
+ kerns, cursives, marks = { }, { }, { }
+ end
+ elseif has_kerns then
+ -- we assume done is true because there are kerns
+ for n in traverse_id(glyph,head) do
+ local k = has_attribute(n,kernpair)
+ if k then
+ local kk = kerns[k]
+ if kk then
+ -- only w can be nil, can be sped up when w == nil
+ local rl, x, y, w = kk[1], kk[2] or 0, kk[3] or 0, kk[4] or 0
+ if y ~= 0 then
+ n.yoffset = y -- todo: h ?
+ end
+ local wx = w - x
+ if rl < 0 then
+ if wx ~= 0 then
+ insert_node_before(head,n,newkern(wx))
+ end
+ if x ~= 0 then
+ insert_node_after (head,n,newkern(x))
+ end
+ else
+ -- if wx ~= 0 then
+ -- insert_node_after(head,n,newkern(wx))
+ -- end
+ if x ~= 0 then
+ insert_node_before(head,n,newkern(x))
+ end
+ end
+ end
+ end
+ end
+ if not keep then
+ kerns = { }
+ end
+ return head, true
+ end
+ return head, false
+end
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-14 01:38:40 +0000