if not modules then modules = { } end modules ['font-otf'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- langs -> languages enz
-- anchor_classes vs kernclasses
-- modification/creationtime in subfont is runtime dus zinloos
-- to_table -> totable
-- ascent descent
local utf = unicode.utf8
local utfbyte = 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 abs = math.abs
local getn = table.getn
local lpegmatch = lpeg.match
local reversed, concat, remove = table.reversed, table.concat, table.remove
local ioflush = io.flush
local fastcopy, tohash, derivetable = table.fastcopy, table.tohash, table.derive
local allocate = utilities.storage.allocate
local registertracker = trackers.register
local registerdirective = directives.register
local starttiming = statistics.starttiming
local stoptiming = statistics.stoptiming
local elapsedtime = statistics.elapsedtime
local findbinfile = resolvers.findbinfile
local trace_private = false registertracker("otf.private", function(v) trace_private = v end)
local trace_loading = false registertracker("otf.loading", function(v) trace_loading = v end)
local trace_features = false registertracker("otf.features", function(v) trace_features = v end)
local trace_dynamics = false registertracker("otf.dynamics", function(v) trace_dynamics = v end)
local trace_sequences = false registertracker("otf.sequences", function(v) trace_sequences = v end)
local trace_markwidth = false registertracker("otf.markwidth", function(v) trace_markwidth = v end)
local trace_defining = false registertracker("fonts.defining", function(v) trace_defining = v end)
local report_otf = logs.reporter("fonts","otf loading")
local fonts = fonts
local otf = fonts.handlers.otf
otf.glists = { "gsub", "gpos" }
otf.version = 2.735 -- beware: also sync font-mis.lua
otf.cache = containers.define("fonts", "otf", otf.version, true)
local fontdata = fonts.hashes.identifiers
local chardata = characters and characters.data -- not used
local otffeatures = fonts.constructors.newfeatures("otf")
local registerotffeature = otffeatures.register
local enhancers = allocate()
otf.enhancers = enhancers
local patches = { }
enhancers.patches = patches
local definers = fonts.definers
local readers = fonts.readers
local constructors = fonts.constructors
local forceload = false
local cleanup = 0 -- mk: 0=885M 1=765M 2=735M (regular run 730M)
local usemetatables = false -- .4 slower on mk but 30 M less mem so we might change the default -- will be directive
local packdata = true
local syncspace = true
local forcenotdef = false
local wildcard = "*"
local default = "dflt"
local fontloaderfields = fontloader.fields
local mainfields = nil
local glyphfields = nil -- not used yet
registerdirective("fonts.otf.loader.cleanup", function(v) cleanup = tonumber(v) or (v and 1) or 0 end)
registerdirective("fonts.otf.loader.force", function(v) forceload = v end)
registerdirective("fonts.otf.loader.usemetatables", function(v) usemetatables = v end)
registerdirective("fonts.otf.loader.pack", function(v) packdata = v end)
registerdirective("fonts.otf.loader.syncspace", function(v) syncspace = v end)
registerdirective("fonts.otf.loader.forcenotdef", function(v) forcenotdef = v end)
local function load_featurefile(raw,featurefile)
if featurefile and featurefile ~= "" then
if trace_loading then
report_otf("featurefile: %s", featurefile)
end
fontloader.apply_featurefile(raw, featurefile)
end
end
local function showfeatureorder(rawdata,filename)
local sequences = rawdata.resources.sequences
if sequences and #sequences > 0 then
if trace_loading then
report_otf("font %s has %s sequences",filename,#sequences)
report_otf(" ")
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
report_otf("%3i %-15s %-20s [%s]",nos,name,typ,concat(subtables,","))
end
if features then
for feature, scripts in next, features do
local tt = { }
if type(scripts) == "table" then
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
report_otf(" %s: %s",feature,concat(tt," "))
end
else
if trace_loading then
report_otf(" %s: %s",feature,tostring(scripts))
end
end
end
end
end
if trace_loading then
report_otf("\n")
end
elseif trace_loading then
report_otf("font %s has no sequences",filename)
end
end
--[[ldx--
We start with a lot of tables and related functions.
--ldx]]--
local valid_fields = table.tohash {
-- "anchor_classes",
"ascent",
-- "cache_version",
"cidinfo",
"copyright",
-- "creationtime",
"descent",
"design_range_bottom",
"design_range_top",
"design_size",
"encodingchanged",
"extrema_bound",
"familyname",
"fontname",
"fontname",
"fontstyle_id",
"fontstyle_name",
"fullname",
-- "glyphs",
"hasvmetrics",
-- "head_optimized_for_cleartype",
"horiz_base",
"issans",
"isserif",
"italicangle",
-- "kerns",
-- "lookups",
"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",
"version",
"vert_base",
"weight",
"weight_width_slope_only",
-- "xuid",
}
local ordered_enhancers = {
"prepare tables",
"prepare glyphs",
"prepare lookups",
"analyze glyphs",
"analyze math",
"prepare tounicode", -- maybe merge with prepare
"reorganize lookups",
"reorganize mark classes",
"reorganize anchor classes",
"reorganize glyph kerns",
"reorganize glyph lookups",
"reorganize glyph anchors",
"merge kern classes",
"reorganize features",
"reorganize subtables",
"check glyphs",
"check metadata",
"check extra features", -- after metadata
"add duplicates",
"check encoding",
"cleanup tables",
}
--[[ldx--
Here we go.
--ldx]]--
local actions = allocate()
local before = allocate()
local after = allocate()
patches.before = before
patches.after = after
local function enhance(name,data,filename,raw)
local enhancer = actions[name]
if enhancer then
if trace_loading then
report_otf("enhance: %s (%s)",name,filename)
ioflush()
end
enhancer(data,filename,raw)
elseif trace_loading then
-- report_otf("enhance: %s is undefined",name)
end
end
function enhancers.apply(data,filename,raw)
local basename = file.basename(lower(filename))
if trace_loading then
report_otf("start enhancing: %s",filename)
end
ioflush() -- we want instant messages
for e=1,#ordered_enhancers do
local enhancer = ordered_enhancers[e]
local b = before[enhancer]
if b then
for pattern, action in next, b do
if find(basename,pattern) then
action(data,filename,raw)
end
end
end
enhance(enhancer,data,filename,raw)
local a = after[enhancer]
if a then
for pattern, action in next, a do
if find(basename,pattern) then
action(data,filename,raw)
end
end
end
ioflush() -- we want instant messages
end
if trace_loading then
report_otf("stop enhancing")
end
ioflush() -- we want instant messages
end
-- patches.register("before","migrate metadata","cambria",function() end)
function patches.register(what,where,pattern,action)
local pw = patches[what]
if pw then
local ww = pw[where]
if ww then
ww[pattern] = action
else
pw[where] = { [pattern] = action}
end
end
end
function patches.report(fmt,...)
if trace_loading then
report_otf("patching: " ..fmt,...)
end
end
function enhancers.register(what,action) -- only already registered can be overloaded
actions[what] = action
end
function otf.load(filename,format,sub,featurefile)
local name = file.basename(file.removesuffix(filename))
local attr = lfs.attributes(filename)
local size = attr and attr.size or 0
local time = attr and attr.modification or 0
if featurefile then
name = name .. "@" .. file.removesuffix(file.basename(featurefile))
end
if sub == "" then
sub = false
end
local hash = name
if sub then
hash = hash .. "-" .. sub
end
hash = containers.cleanname(hash)
local featurefiles
if featurefile then
featurefiles = { }
for s in gmatch(featurefile,"[^,]+") do
local name = resolvers.findfile(file.addsuffix(s,'fea'),'fea') or ""
if name == "" then
report_otf("loading: no featurefile '%s'",s)
else
local attr = lfs.attributes(name)
featurefiles[#featurefiles+1] = {
name = name,
size = attr and attr.size or 0,
time = attr and attr.modification or 0,
}
end
end
if #featurefiles == 0 then
featurefiles = nil
end
end
local data = containers.read(otf.cache,hash)
local reload = not data or data.size ~= size or data.time ~= time
if forceload then
report_otf("loading: forced reload due to hard coded flag")
reload = true
end
if not reload then
local featuredata = data.featuredata
if featurefiles then
if not featuredata or #featuredata ~= #featurefiles then
reload = true
else
for i=1,#featurefiles do
local fi, fd = featurefiles[i], featuredata[i]
if fi.name ~= fd.name or fi.size ~= fd.size or fi.time ~= fd.time then
reload = true
break
end
end
end
elseif featuredata then
reload = true
end
if reload then
report_otf("loading: forced reload due to changed featurefile specification: %s",featurefile or "--")
end
end
if reload then
report_otf("loading: %s (hash: %s)",filename,hash)
local fontdata, messages
if sub then
fontdata, messages = fontloader.open(filename,sub)
else
fontdata, messages = fontloader.open(filename)
end
if fontdata then
mainfields = mainfields or (fontloaderfields and fontloaderfields(fontdata))
end
if trace_loading and messages and #messages > 0 then
if type(messages) == "string" then
report_otf("warning: %s",messages)
else
for m=1,#messages do
report_otf("warning: %s",tostring(messages[m]))
end
end
else
report_otf("font loaded okay")
end
if fontdata then
if featurefiles then
for i=1,#featurefiles do
load_featurefile(fontdata,featurefiles[i].name)
end
end
local unicodes = {
-- names to unicodes
}
local splitter = lpeg.splitter(" ",unicodes)
data = {
size = size,
time = time,
format = format,
featuredata = featurefiles,
resources = {
filename = resolvers.unresolve(filename), -- no shortcut
version = otf.version,
creator = "context mkiv",
unicodes = unicodes,
indices = {
-- index to unicodes
},
duplicates = {
-- alternative unicodes
},
variants = {
-- alternative unicodes (variants)
},
lookuptypes = {
},
},
metadata = {
-- raw metadata, not to be used
},
properties = {
-- normalized metadata
},
descriptions = {
},
goodies = {
},
helpers = {
tounicodelist = splitter,
tounicodetable = lpeg.Ct(splitter),
},
}
starttiming(data)
report_otf("file size: %s", size)
enhancers.apply(data,filename,fontdata)
if packdata then
if cleanup > 0 then
collectgarbage("collect")
--~ lua.collectgarbage()
end
enhance("pack",data,filename,nil)
end
report_otf("saving in cache: %s",filename)
data = containers.write(otf.cache, hash, data)
if cleanup > 1 then
collectgarbage("collect")
--~ lua.collectgarbage()
end
stoptiming(data)
if elapsedtime then -- not in generic
report_otf("preprocessing and caching took %s seconds",elapsedtime(data))
end
fontloader.close(fontdata) -- free memory
if cleanup > 3 then
collectgarbage("collect")
--~ lua.collectgarbage()
end
data = containers.read(otf.cache, hash) -- this frees the old table and load the sparse one
if cleanup > 2 then
collectgarbage("collect")
--~ lua.collectgarbage()
end
else
data = nil
report_otf("loading failed (file read error)")
end
end
if data then
if trace_defining then
report_otf("loading from cache: %s",hash)
end
enhance("unpack",data,filename,nil,false)
enhance("add dimensions",data,filename,nil,false)
if trace_sequences then
showfeatureorder(data,filename)
end
end
return data
end
local mt = {
__index = function(t,k) -- maybe set it
if k == "height" then
local ht = t.boundingbox[4]
return ht < 0 and 0 or ht
elseif k == "depth" then
local dp = -t.boundingbox[2]
return dp < 0 and 0 or dp
elseif k == "width" then
return 0
elseif k == "name" then -- or maybe uni*
return forcenotdef and ".notdef"
end
end
}
actions["prepare tables"] = function(data,filename,raw)
data.properties.italic_correction = false
end
actions["add dimensions"] = function(data,filename)
-- 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 descriptions = data.descriptions
local resources = data.resources
local defaultwidth = resources.defaultwidth or 0
local defaultheight = resources.defaultheight or 0
local defaultdepth = resources.defaultdepth or 0
if usemetatables then
for _, d in next, descriptions do
local wd = d.width
if not wd then
d.width = defaultwidth
elseif trace_markwidth and wd ~= 0 and d.class == "mark" then
report_otf("mark with width %s (%s) in %s",wd,d.name or "",file.basename(filename))
-- d.width = -wd
end
setmetatable(d,mt)
end
else
for _, d in next, descriptions do
local bb, wd = d.boundingbox, d.width
if not wd then
d.width = defaultwidth
elseif trace_markwidth and wd ~= 0 and d.class == "mark" then
report_otf("mark with width %s (%s) in %s",wd,d.name or "",file.basename(filename))
-- d.width = -wd
end
-- if forcenotdef 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
-- not set
else
d.height = ht
end
if dp == 0 or dp < 0 then
-- not set
else
d.depth = dp
end
end
end
end
end
end
local function somecopy(old) -- fast one
if old then
local new = { }
if type(old) == "table" then
for k, v in next, old do
if k == "glyphs" then
-- skip
elseif type(v) == "table" then
new[k] = somecopy(v)
else
new[k] = v
end
end
else
for i=1,#mainfields do
local k = mainfields[i]
local v = old[k]
if k == "glyphs" then
-- skip
elseif type(v) == "table" then
new[k] = somecopy(v)
else
new[k] = v
end
end
end
return new
else
return { }
end
end
-- not setting italic_correction and class (when nil) during
-- table cronstruction can save some mem
actions["prepare glyphs"] = function(data,filename,raw)
local rawglyphs = raw.glyphs
local rawsubfonts = raw.subfonts
local rawcidinfo = raw.cidinfo
local criterium = constructors.privateoffset
local private = criterium
local resources = data.resources
local metadata = data.metadata
local properties = data.properties
local descriptions = data.descriptions
local unicodes = resources.unicodes -- name to unicode
local indices = resources.indices -- index to unicode
local duplicates = resources.duplicates
local variants = resources.variants
if rawsubfonts then
metadata.subfonts = { }
properties.cidinfo = rawcidinfo
if rawcidinfo.registry then
local cidmap = fonts.cid.getmap(rawcidinfo)
if cidmap then
rawcidinfo.usedname = cidmap.usedname
local nofnames, nofunicodes = 0, 0
local cidunicodes, cidnames = cidmap.unicodes, cidmap.names
for cidindex=1,#rawsubfonts do
local subfont = rawsubfonts[cidindex]
local cidglyphs = subfont.glyphs
metadata.subfonts[cidindex] = somecopy(subfont)
for index=0,subfont.glyphcnt-1 do -- we could take the previous glyphcnt instead of 0
local glyph = cidglyphs[index]
if glyph then
local unicode = glyph.unicode
local name = glyph.name or cidnames[index]
if not unicode or unicode == -1 or unicode >= criterium then
unicode = cidunicodes[index]
end
if not unicode or unicode == -1 or unicode >= criterium then
if not name then
name = format("u%06X",private)
end
unicode = private
unicodes[name] = private
if trace_private then
report_otf("enhance: glyph %s at index 0x%04X is moved to private unicode slot U+%05X",name,index,private)
end
private = private + 1
nofnames = nofnames + 1
else
if not name then
name = format("u%06X",unicode)
end
unicodes[name] = unicode
nofunicodes = nofunicodes + 1
end
indices[index] = unicode -- each index is unique (at least now)
local description = {
-- width = glyph.width,
boundingbox = glyph.boundingbox,
name = glyph.name or name or "unknown", -- uniXXXX
cidindex = cidindex,
index = index,
glyph = glyph,
}
descriptions[unicode] = description
else
-- report_otf("potential problem: glyph 0x%04X is used but empty",index)
end
end
end
if trace_loading then
report_otf("cid font remapped, %s unicode points, %s symbolic names, %s glyphs",nofunicodes, nofnames, nofunicodes+nofnames)
end
elseif trace_loading then
report_otf("unable to remap cid font, missing cid file for %s",filename)
end
elseif trace_loading then
report_otf("font %s has no glyphs",filename)
end
else
for index=0,raw.glyphcnt-1 do -- not raw.glyphmax-1 (as that will crash)
local glyph = rawglyphs[index]
if glyph then
local unicode = glyph.unicode
local name = glyph.name
if not unicode or unicode == -1 or unicode >= criterium then
unicode = private
unicodes[name] = private
if trace_private then
report_otf("enhance: glyph %s at index 0x%04X is moved to private unicode slot U+%05X",name,index,private)
end
private = private + 1
else
unicodes[name] = unicode
end
indices[index] = unicode
if not name then
name = format("u%06X",unicode)
end
descriptions[unicode] = {
-- width = glyph.width,
boundingbox = glyph.boundingbox,
name = name,
index = index,
glyph = glyph,
}
local altuni = glyph.altuni
if altuni then
local d
for i=1,#altuni do
local a = altuni[i]
local u = a.unicode
local v = a.variant
if v then
local vv = variants[v]
if vv then
vv[u] = unicode
else -- xits-math has some:
vv = { [u] = unicode }
variants[v] = vv
end
elseif d then
d[#d+1] = u
else
d = { u }
end
end
if d then
duplicates[unicode] = d
end
end
else
report_otf("potential problem: glyph 0x%04X is used but empty",index)
end
end
end
resources.private = private
end
-- the next one is still messy but will get better when we have
-- flattened map/enc tables in the font loader
actions["check encoding"] = function(data,filename,raw)
local descriptions = data.descriptions
local resources = data.resources
local properties = data.properties
local unicodes = resources.unicodes -- name to unicode
local indices = resources.indices -- index to unicodes
-- begin of messy (not needed when cidmap)
local mapdata = raw.map or { }
local unicodetoindex = mapdata and mapdata.map or { }
-- local encname = lower(data.enc_name or raw.enc_name or mapdata.enc_name or "")
local encname = lower(data.enc_name or mapdata.enc_name or "")
local criterium = 0xFFFF -- for instance cambria has a lot of mess up there
-- end of messy
if find(encname,"unicode") then -- unicodebmp, unicodefull, ...
if trace_loading then
report_otf("checking embedded unicode map '%s'",encname)
end
for unicode, index in next, unicodetoindex do -- altuni already covers this
if unicode <= criterium and not descriptions[unicode] then
local parent = indices[index] -- why nil?
if parent then
report_otf("weird, unicode U+%05X points to U+%05X with index 0x%04X",unicode,parent,index)
else
report_otf("weird, unicode U+%05X points to nowhere with index 0x%04X",unicode,index)
end
end
end
elseif properties.cidinfo then
report_otf("warning: no unicode map, used cidmap '%s'",properties.cidinfo.usedname or "?")
else
report_otf("warning: non unicode map '%s', only using glyph unicode data",encname or "whatever")
end
if mapdata then
mapdata.map = { } -- clear some memory
end
end
-- for the moment we assume that a fotn with lookups will not use
-- altuni so we stick to kerns only
actions["add duplicates"] = function(data,filename,raw)
local descriptions = data.descriptions
local resources = data.resources
local properties = data.properties
local unicodes = resources.unicodes -- name to unicode
local indices = resources.indices -- index to unicodes
local duplicates = resources.duplicates
for unicode, d in next, duplicates do
for i=1,#d do
local u = d[i]
if not descriptions[u] then
local description = descriptions[unicode]
local duplicate = table.copy(description) -- else packing problem
duplicate.comment = format("copy of U+%05X", unicode)
descriptions[u] = duplicate
local n = 0
for _, description in next, descriptions do
if kerns then
local kerns = description.kerns
for _, k in next, kerns do
local ku = k[unicode]
if ku then
k[u] = ku
n = n + 1
end
end
end
-- todo: lookups etc
end
if trace_loading then
report_otf("duplicating U+%05X to U+%05X with index 0x%04X (%s kerns)",unicode,u,description.index,n)
end
end
end
end
end
-- class : nil base mark ligature component (maybe we don't need it in description)
-- boundingbox: split into ht/dp takes more memory (larger tables and less sharing)
actions["analyze glyphs"] = function(data,filename,raw) -- maybe integrate this in the previous
local descriptions = data.descriptions
local resources = data.resources
local metadata = data.metadata
local properties = data.properties
local italic_correction = false
local widths = { }
local marks = { }
for unicode, description in next, descriptions do
local glyph = description.glyph
local italic = glyph.italic_correction
if not italic then
-- skip
elseif italic == 0 then
-- skip
else
description.italic = italic
italic_correction = true
end
local width = glyph.width
widths[width] = (widths[width] or 0) + 1
local class = glyph.class
if class then
if class == "mark" then
marks[unicode] = true
end
description.class = class
end
end
-- flag italic
properties.italic_correction = italic_correction
-- flag marks
resources.marks = marks
-- share most common 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 -- maybe 500
if trace_loading then
report_otf("most common width: %s (%s times), sharing (cjk font)",wd,most)
end
for unicode, description in next, descriptions do
if description.width == wd then
-- description.width = nil
else
description.width = description.glyph.width
end
end
resources.defaultwidth = wd
else
for unicode, description in next, descriptions do
description.width = description.glyph.width
end
end
end
actions["reorganize mark classes"] = function(data,filename,raw)
local mark_classes = raw.mark_classes
if mark_classes then
local resources = data.resources
local unicodes = resources.unicodes
local markclasses = { }
resources.markclasses = markclasses -- reversed
for name, class in next, mark_classes do
local t = { }
for s in gmatch(class,"[^ ]+") do
t[unicodes[s]] = true
end
markclasses[name] = t
end
end
end
actions["reorganize features"] = function(data,filename,raw) -- combine with other
local features = { }
data.resources.features = features
for k, what in next, otf.glists do
local dw = raw[what]
if dw then
local f = { }
features[what] = f
for i=1,#dw do
local d= dw[i]
local dfeatures = d.features
if dfeatures then
for i=1,#dfeatures do
local df = dfeatures[i]
local tag = strip(lower(df.tag))
local ft = f[tag]
if not ft then
ft = { }
f[tag] = ft
end
local dscripts = df.scripts
for i=1,#dscripts do
local d = dscripts[i]
local languages = d.langs
local script = strip(lower(d.script))
local fts = ft[script] if not fts then fts = {} ft[script] = fts end
for i=1,#languages do
fts[strip(lower(languages[i]))] = true
end
end
end
end
end
end
end
end
actions["reorganize anchor classes"] = function(data,filename,raw)
local resources = data.resources
local anchor_to_lookup = { }
local lookup_to_anchor = { }
resources.anchor_to_lookup = anchor_to_lookup
resources.lookup_to_anchor = lookup_to_anchor
local classes = raw.anchor_classes -- anchor classes not in final table
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 l then
l[anchor] = true
else
l = { [anchor] = true }
lookup_to_anchor[lookup] = l
end
a[lookup] = true
end
end
end
end
actions["prepare tounicode"] = function(data,filename,raw)
fonts.mappings.addtounicode(data,filename)
end
local g_directions = {
gsub_contextchain = 1,
gpos_contextchain = 1,
-- gsub_context = 1,
-- gpos_context = 1,
gsub_reversecontextchain = -1,
gpos_reversecontextchain = -1,
}
actions["reorganize subtables"] = function(data,filename,raw)
local resources = data.resources
local sequences = { }
local lookups = { }
local chainedfeatures = { }
resources.sequences = sequences
resources.lookups = lookups
for _, what in next, otf.glists do
local dw = raw[what]
if dw then
for k=1,#dw do
local gk = dw[k]
local typ = gk.type
local chain = g_directions[typ] or 0
local subtables = gk.subtables
if subtables then
local t = { }
for s=1,#subtables do
t[s] = subtables[s].name
end
subtables = t
end
local flags, markclass = gk.flags, nil
if flags then
local t = { -- 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,
}
markclass = flags.mark_class
if markclass then
markclass = resources.markclasses[markclass]
end
flags = t
end
--
local name = gk.name
--
local features = gk.features
if features then
-- scripts, tag, ismac
local f = { }
for i=1,#features do
local df = features[i]
local tag = strip(lower(df.tag))
local ft = f[tag] if not ft then ft = {} f[tag] = ft end
local dscripts = df.scripts
for i=1,#dscripts do
local d = dscripts[i]
local languages = d.langs
local script = strip(lower(d.script))
local fts = ft[script] if not fts then fts = {} ft[script] = fts end
for i=1,#languages do
fts[strip(lower(languages[i]))] = true
end
end
end
sequences[#sequences+1] = {
type = typ,
chain = chain,
flags = flags,
name = name,
subtables = subtables,
markclass = markclass,
features = f,
}
else
lookups[name] = {
type = typ,
chain = chain,
flags = flags,
subtables = subtables,
markclass = markclass,
}
end
end
end
end
end
-- test this:
--
-- for _, what in next, otf.glists do
-- raw[what] = nil
-- end
actions["prepare lookups"] = function(data,filename,raw)
local lookups = raw.lookups
if lookups then
data.lookups = lookups
end
end
-- The reverse handler does a bit redundant splitting but it's seldom
-- seen so we don' tbother too much. We could store the replacement
-- in the current list (value instead of true) but it makes other code
-- uglier. Maybe some day.
local function t_uncover(splitter,cache,covers)
local result = { }
for n=1,#covers do
local cover = covers[n]
local uncovered = cache[cover]
if not uncovered then
uncovered = lpegmatch(splitter,cover)
cache[cover] = uncovered
end
result[n] = uncovered
end
return result
end
local function t_hashed(t,cache)
if t then
local ht = { }
for i=1,#t do
local ti = t[i]
local tih = cache[ti]
if not tih then
tih = { }
for i=1,#ti do
tih[ti[i]] = true
end
cache[ti] = tih
end
ht[i] = tih
end
return ht
else
return nil
end
end
local function s_uncover(splitter,cache,cover)
if cover == "" then
return nil
else
local uncovered = cache[cover]
if not uncovered then
uncovered = lpegmatch(splitter,cover)
for i=1,#uncovered do
uncovered[i] = { [uncovered[i]] = true }
end
cache[cover] = uncovered
end
return uncovered
end
end
local s_hashed = t_hashed
local function r_uncover(splitter,cache,cover,replacements)
if cover == "" then
return nil
else
-- we always have current as { } even in the case of one
local uncovered = cover[1]
local replaced = cache[replacements]
if not replaced then
replaced = lpegmatch(splitter,replacements)
cache[replacements] = replaced
end
local nu, nr = #uncovered, #replaced
local r = { }
if nu == nr then
for i=1,nu do
r[uncovered[i]] = replaced[i]
end
end
return r
end
end
actions["reorganize lookups"] = function(data,filename,raw)
-- we prefer the before lookups in a normal order
if data.lookups then
local splitter = data.helpers.tounicodetable
local cache, h_cache = { }, { }
for _, lookup in next, data.lookups do
local rules = lookup.rules
if rules then
local format = lookup.format
if format == "class" then
local before_class = lookup.before_class
if before_class then
before_class = t_uncover(splitter,cache,reversed(before_class))
end
local current_class = lookup.current_class
if current_class then
current_class = t_uncover(splitter,cache,current_class)
end
local after_class = lookup.after_class
if after_class then
after_class = t_uncover(splitter,cache,after_class)
end
for i=1,#rules do
local rule = rules[i]
local class = rule.class
local before = class.before
if before then
for i=1,#before do
before[i] = before_class[before[i]] or { }
end
rule.before = t_hashed(before,h_cache)
end
local current = class.current
local lookups = rule.lookups
if current then
for i=1,#current do
current[i] = current_class[current[i]] or { }
if lookups and not lookups[i] then
lookups[i] = false -- e.g. we can have two lookups and one replacement
end
end
rule.current = t_hashed(current,h_cache)
end
local after = class.after
if after then
for i=1,#after do
after[i] = after_class[after[i]] or { }
end
rule.after = t_hashed(after,h_cache)
end
rule.class = nil
end
lookup.before_class = nil
lookup.current_class = nil
lookup.after_class = nil
lookup.format = "coverage"
elseif format == "coverage" then
for i=1,#rules do
local rule = rules[i]
local coverage = rule.coverage
if coverage then
local before = coverage.before
if before then
before = t_uncover(splitter,cache,reversed(before))
rule.before = t_hashed(before,h_cache)
end
local current = coverage.current
if current then
current = t_uncover(splitter,cache,current)
rule.current = t_hashed(current,h_cache)
end
local after = coverage.after
if after then
after = t_uncover(splitter,cache,after)
rule.after = t_hashed(after,h_cache)
end
rule.coverage = nil
end
end
elseif format == "reversecoverage" then -- special case, single substitution only
for i=1,#rules do
local rule = rules[i]
local reversecoverage = rule.reversecoverage
if reversecoverage then
local before = reversecoverage.before
if before then
before = t_uncover(splitter,cache,reversed(before))
rule.before = t_hashed(before,h_cache)
end
local current = reversecoverage.current
if current then
current = t_uncover(splitter,cache,current)
rule.current = t_hashed(current,h_cache)
end
local after = reversecoverage.after
if after then
after = t_uncover(splitter,cache,after)
rule.after = t_hashed(after,h_cache)
end
local replacements = reversecoverage.replacements
if replacements then
rule.replacements = r_uncover(splitter,cache,current,replacements)
end
rule.reversecoverage = nil
end
end
elseif format == "glyphs" then
for i=1,#rules do
local rule = rules[i]
local glyphs = rule.glyphs
if glyphs then
local fore = glyphs.fore
if fore then
fore = s_uncover(splitter,cache,fore)
rule.before = s_hashed(fore,h_cache)
end
local back = glyphs.back
if back then
back = s_uncover(splitter,cache,back)
rule.after = s_hashed(back,h_cache)
end
local names = glyphs.names
if names then
names = s_uncover(splitter,cache,names)
rule.current = s_hashed(names,h_cache)
end
rule.glyphs = nil
end
end
end
end
end
end
end
-- to be checked italic_correction
local function check_variants(unicode,the_variants,splitter,unicodes)
local variants = the_variants.variants
if variants then -- use splitter
local glyphs = lpegmatch(splitter,variants)
local done = { [unicode] = true }
local n = 0
for i=1,#glyphs do
local g = glyphs[i]
if done[g] then
report_otf("skipping cyclic reference U+%05X in math variant U+%05X",g,unicode)
elseif n == 0 then
n = 1
variants = { g }
else
n = n + 1
variants[n] = g
end
end
if n == 0 then
variants = nil
end
end
local parts = the_variants.parts
if parts then
local p = #parts
if p > 0 then
for i=1,p do
local pi = parts[i]
pi.glyph = unicodes[pi.component] or 0
pi.component = nil
end
else
parts = nil
end
end
local italic_correction = the_variants.italic_correction
if italic_correction and italic_correction == 0 then
italic_correction = nil
end
return variants, parts, italic_correction
end
actions["analyze math"] = function(data,filename,raw)
if raw.math then
data.metadata.math = raw.math
local unicodes = data.resources.unicodes
local splitter = data.helpers.tounicodetable
for unicode, description in next, data.descriptions do
local glyph = description.glyph
local mathkerns = glyph.mathkern -- singular
local horiz_variants = glyph.horiz_variants
local vert_variants = glyph.vert_variants
local top_accent = glyph.top_accent
if mathkerns or horiz_variants or vert_variants or top_accent then
local math = { }
if top_accent then
math.top_accent = top_accent
end
if mathkerns then
for k, v in next, mathkerns do
if not next(v) then
mathkerns[k] = nil
else
for k, v in next, v do
if v == 0 then
k[v] = nil -- height / kern can be zero
end
end
end
end
math.kerns = mathkerns
end
if horiz_variants then
math.horiz_variants, math.horiz_parts, math.horiz_italic_correction = check_variants(unicode,horiz_variants,splitter,unicodes)
end
if vert_variants then
math.vert_variants, math.vert_parts, math.vert_italic_correction = check_variants(unicode,vert_variants,splitter,unicodes)
end
local italic_correction = description.italic
if italic_correction and italic_correction ~= 0 then
math.italic_correction = italic_correction
end
description.math = math
end
end
end
end
actions["reorganize glyph kerns"] = function(data,filename,raw)
local descriptions = data.descriptions
local resources = data.resources
local unicodes = resources.unicodes
for unicode, description in next, descriptions do
local kerns = description.glyph.kerns
if kerns then
local newkerns = { }
for k, kern in next, kerns do
local name = kern.char
local offset = kern.off
local lookup = kern.lookup
if name and offset and lookup then
local unicode = unicodes[name]
if unicode then
if type(lookup) == "table" then
for l=1,#lookup do
local lookup = lookup[l]
local lookupkerns = newkerns[lookup]
if lookupkerns then
lookupkerns[unicode] = offset
else
newkerns[lookup] = { [unicode] = offset }
end
end
else
local lookupkerns = newkerns[lookup]
if lookupkerns then
lookupkerns[unicode] = offset
else
newkerns[lookup] = { [unicode] = offset }
end
end
elseif trace_loading then
report_otf("problems with unicode %s of kern %s of glyph U+%05X",name,k,unicode)
end
end
end
description.kerns = newkerns
end
end
end
actions["merge kern classes"] = function(data,filename,raw)
local gposlist = raw.gpos
if gposlist then
local descriptions = data.descriptions
local resources = data.resources
local unicodes = resources.unicodes
local splitter = data.helpers.tounicodetable
for gp=1,#gposlist do
local gpos = gposlist[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 -- the next one is quite slow
local split = { } -- saves time
for k=1,#kernclass do
local kcl = kernclass[k]
local firsts = kcl.firsts
local seconds = kcl.seconds
local offsets = kcl.offsets
local lookups = kcl.lookup -- singular
if type(lookups) ~= "table" then
lookups = { lookups }
end
-- we can check the max in the loop
-- local maxseconds = getn(seconds)
for n, s in next, firsts do
split[s] = split[s] or lpegmatch(splitter,s)
end
local maxseconds = 0
for n, s in next, seconds do
if n > maxseconds then
maxseconds = n
end
split[s] = split[s] or lpegmatch(splitter,s)
end
for l=1,#lookups do
local lookup = lookups[l]
for fk=1,#firsts do -- maxfirsts ?
local fv = firsts[fk]
local splt = split[fv]
if splt then
local extrakerns = { }
local baseoffset = (fk-1) * maxseconds
-- for sk=2,maxseconds do
-- local sv = seconds[sk]
for sk, sv in next, seconds do
local splt = split[sv]
if splt then -- redundant test
local offset = offsets[baseoffset + sk]
if offset then
for i=1,#splt do
extrakerns[splt[i]] = offset
end
end
end
end
for i=1,#splt do
local first_unicode = splt[i]
local description = descriptions[first_unicode]
if description then
local kerns = description.kerns
if not kerns then
kerns = { } -- unicode indexed !
description.kerns = kerns
end
local lookupkerns = kerns[lookup]
if not lookupkerns then
lookupkerns = { }
kerns[lookup] = lookupkerns
end
for second_unicode, kern in next, extrakerns do
lookupkerns[second_unicode] = kern
end
elseif trace_loading then
report_otf("no glyph data for U+%05X", first_unicode)
end
end
end
end
end
end
subtable.kernclass = { }
end
end
end
end
end
end
actions["check glyphs"] = function(data,filename,raw)
for unicode, description in next, data.descriptions do
description.glyph = nil
end
end
-- future versions will remove _
actions["check metadata"] = function(data,filename,raw)
local metadata = data.metadata
for _, k in next, mainfields do
if valid_fields[k] then
local v = raw[k]
if not metadata[k] then
metadata[k] = v
end
end
end
-- metadata.pfminfo = raw.pfminfo -- not already done?
local ttftables = metadata.ttf_tables
if ttftables then
for i=1,#ttftables do
ttftables[i].data = "deleted"
end
end
end
actions["cleanup tables"] = function(data,filename,raw)
data.resources.indices = nil -- not needed
data.helpers = nil
end
-- kern: ttf has a table with kerns
--
-- Weird, as maxfirst and maxseconds can have holes, first seems to be indexed, but
-- seconds can start at 2 .. this need to be fixed as getn as well as # are sort of
-- unpredictable alternatively we could force an [1] if not set (maybe I will do that
-- anyway).
-- we can share { } as it is never set
--- ligatures have an extra specification.char entry that we don't use
actions["reorganize glyph lookups"] = function(data,filename,raw)
local resources = data.resources
local unicodes = resources.unicodes
local descriptions = data.descriptions
local splitter = data.helpers.tounicodelist
local lookuptypes = resources.lookuptypes
for unicode, description in next, descriptions do
local lookups = description.glyph.lookups
if lookups then
for tag, lookuplist in next, lookups do
for l=1,#lookuplist do
local lookup = lookuplist[l]
local specification = lookup.specification
local lookuptype = lookup.type
local lt = lookuptypes[tag]
if not lt then
lookuptypes[tag] = lookuptype
elseif lt ~= lookuptype then
report_otf("conflicting lookuptypes: %s => %s and %s",tag,lt,lookuptype)
end
if lookuptype == "ligature" then
lookuplist[l] = { lpegmatch(splitter,specification.components) }
elseif lookuptype == "alternate" then
lookuplist[l] = { lpegmatch(splitter,specification.components) }
elseif lookuptype == "substitution" then
lookuplist[l] = unicodes[specification.variant]
elseif lookuptype == "multiple" then
lookuplist[l] = { lpegmatch(splitter,specification.components) }
elseif lookuptype == "position" then
lookuplist[l] = {
specification.x or 0,
specification.y or 0,
specification.h or 0,
specification.v or 0
}
elseif lookuptype == "pair" then
local one = specification.offsets[1]
local two = specification.offsets[2]
local paired = unicodes[specification.paired]
if one then
if two then
lookuplist[l] = { 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
lookuplist[l] = { paired, { one.x or 0, one.y or 0, one.h or 0, one.v or 0 } }
end
else
if two then
lookuplist[l] = { paired, { }, { two.x or 0, two.y or 0, two.h or 0, two.v or 0} } -- maybe nil instead of { }
else
lookuplist[l] = { paired }
end
end
end
end
end
local slookups, mlookups
for tag, lookuplist in next, lookups do
if #lookuplist == 1 then
if slookups then
slookups[tag] = lookuplist[1]
else
slookups = { [tag] = lookuplist[1] }
end
else
if mlookups then
mlookups[tag] = lookuplist
else
mlookups = { [tag] = lookuplist }
end
end
end
if slookups then
description.slookups = slookups
end
if mlookups then
description.mlookups = mlookups
end
end
end
end
actions["reorganize glyph anchors"] = function(data,filename,raw) -- when we replace inplace we safe entries
local descriptions = data.descriptions
for unicode, description in next, descriptions do
local anchors = description.glyph.anchors
if anchors then
for class, data in next, anchors do
if class == "baselig" then
for tag, specification in next, data do
for i=1,#specification do
local si = specification[i]
specification[i] = { si.x or 0, si.y or 0 }
end
end
else
for tag, specification in next, data do
data[tag] = { specification.x or 0, specification.y or 0 }
end
end
end
description.anchors = anchors
end
end
end
-- modes: node, base, none
function otf.setfeatures(tfmdata,features)
local okay = constructors.initializefeatures("otf",tfmdata,features,trace_features,report_otf)
if okay then
return constructors.collectprocessors("otf",tfmdata,features,trace_features,report_otf)
else
return { } -- will become false
end
end
-- 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)
--
-- we cannot share descriptions as virtual fonts might extend them (ok,
-- we could use a cache with a hash
--
-- we already assing an empty tabel to characters as we can add for
-- instance protruding info and loop over characters; one is not supposed
-- to change descriptions and if one does so one should make a copy!
local function copytotfm(data,cache_id)
if data then
local metadata = data.metadata
local resources = data.resources
local properties = derivetable(data.properties)
local descriptions = derivetable(data.descriptions)
local goodies = derivetable(data.goodies)
local characters = { }
local parameters = { }
local mathparameters = { }
--
local pfminfo = metadata.pfminfo or { }
local resources = data.resources
local unicodes = resources.unicodes
-- local mode = data.mode or "base"
local spaceunits = 500
local spacer = "space"
local designsize = metadata.designsize or metadata.design_size or 100
local mathspecs = metadata.math
--
if designsize == 0 then
designsize = 100
end
if mathspecs then
for name, value in next, mathspecs do
mathparameters[name] = value
end
end
for unicode, _ in next, data.descriptions do -- use parent table
characters[unicode] = { }
end
if mathspecs then
-- we could move this to the scaler but not that much is saved
-- and this is cleaner
for unicode, character in next, characters do
local d = descriptions[unicode]
local m = d.math
if m then
-- watch out: luatex uses horiz_variants for the parts
local variants = m.horiz_variants
local parts = m.horiz_parts
-- local done = { [unicode] = true }
if variants then
local c = character
for i=1,#variants do
local un = variants[i]
-- if done[un] then
-- -- report_otf("skipping cyclic reference U+%05X in math variant U+%05X",un,unicode)
-- else
c.next = un
c = characters[un]
-- done[un] = true
-- end
end -- c is now last in chain
c.horiz_variants = parts
elseif parts then
character.horiz_variants = parts
end
local variants = m.vert_variants
local parts = m.vert_parts
-- local done = { [unicode] = true }
if variants then
local c = character
for i=1,#variants do
local un = variants[i]
-- if done[un] then
-- -- report_otf("skipping cyclic reference U+%05X in math variant U+%05X",un,unicode)
-- else
c.next = un
c = characters[un]
-- done[un] = true
-- end
end -- c is now last in chain
c.vert_variants = parts
elseif parts then
character.vert_variants = parts
end
local italic_correction = m.vert_italic_correction
if italic_correction then
character.vert_italic_correction = italic_correction -- was c.
end
local top_accent = m.top_accent
if top_accent then
character.top_accent = top_accent
end
local kerns = m.kerns
if kerns then
character.mathkerns = kerns
end
end
end
end
-- end math
local monospaced = metadata.isfixedpitch or (pfminfo.panose and pfminfo.panose.proportion == "Monospaced")
local charwidth = pfminfo.avgwidth -- or unset
local italicangle = metadata.italicangle
local charxheight = pfminfo.os2_xheight and pfminfo.os2_xheight > 0 and pfminfo.os2_xheight
properties.monospaced = monospaced
parameters.italicangle = italicangle
parameters.charwidth = charwidth
parameters.charxheight = charxheight
--
local space = 0x0020 -- unicodes['space'], unicodes['emdash']
local emdash = 0x2014 -- unicodes['space'], unicodes['emdash']
if monospaced then
if descriptions[space] then
spaceunits, spacer = descriptions[space].width, "space"
end
if not spaceunits and descriptions[emdash] then
spaceunits, spacer = descriptions[emdash].width, "emdash"
end
if not spaceunits and charwidth then
spaceunits, spacer = charwidth, "charwidth"
end
else
if descriptions[space] then
spaceunits, spacer = descriptions[space].width, "space"
end
if not spaceunits and descriptions[emdash] then
spaceunits, spacer = descriptions[emdash].width/2, "emdash/2"
end
if not spaceunits and charwidth then
spaceunits, spacer = charwidth, "charwidth"
end
end
spaceunits = tonumber(spaceunits) or 500 -- brrr
-- we need a runtime lookup because of running from cdrom or zip, brrr (shouldn't we use the basename then?)
local filename = constructors.checkedfilename(resources)
local fontname = metadata.fontname
local fullname = metadata.fullname or fontname
local units = metadata.units_per_em or 1000
--
parameters.slant = 0
parameters.space = spaceunits -- 3.333 (cmr10)
parameters.space_stretch = units/2 -- 500 -- 1.666 (cmr10)
parameters.space_shrink = 1*units/3 -- 333 -- 1.111 (cmr10)
parameters.x_height = 2*units/5 -- 400
parameters.quad = units -- 1000
if spaceunits < 2*units/5 then
-- todo: warning
end
if italicangle then
parameters.italicangle = italicangle
parameters.italicfactor = math.cos(math.rad(90+italicangle))
parameters.slant = - math.round(math.tan(italicangle*math.pi/180))
end
if monospaced then
parameters.space_stretch = 0
parameters.space_shrink = 0
elseif syncspace then --
parameters.space_stretch = spaceunits/2
parameters.space_shrink = spaceunits/3
end
parameters.extra_space = parameters.space_shrink -- 1.111 (cmr10)
if charxheight then
parameters.x_height = charxheight
else
local x = 0x78 -- unicodes['x']
if x then
local x = descriptions[x]
if x then
parameters.x_height = x.height
end
end
end
--
parameters.designsize = (designsize/10)*65536
parameters.ascender = abs(metadata.ascent or 0)
parameters.descender = abs(metadata.descent or 0)
parameters.units = units
--
properties.space = spacer
properties.encodingbytes = 2
properties.format = data.format or fonts.formats[filename] or "opentype"
properties.noglyphnames = true
properties.filename = filename
properties.fontname = fontname
properties.fullname = fullname
properties.psname = fontname or fullname
properties.name = filename or fullname
--
-- properties.name = specification.name
-- properties.sub = specification.sub
return {
characters = characters,
descriptions = descriptions,
parameters = parameters,
mathparameters = mathparameters,
resources = resources,
properties = properties,
goodies = goodies,
}
end
end
local function otftotfm(specification)
local cache_id = specification.hash
local tfmdata = containers.read(constructors.cache,cache_id)
if not tfmdata then
local name = specification.name
local sub = specification.sub
local filename = specification.filename
local format = specification.format
local features = specification.features.normal
local rawdata = otf.load(filename,format,sub,features and features.featurefile)
if rawdata and next(rawdata) then
rawdata.lookuphash = { }
tfmdata = copytotfm(rawdata,cache_id)
if tfmdata and next(tfmdata) then
-- at this moment no characters are assigned yet, only empty slots
local features = constructors.checkedfeatures("otf",features)
local shared = tfmdata.shared
if not shared then
shared = { }
tfmdata.shared = shared
end
shared.rawdata = rawdata
shared.features = features -- default
shared.dynamics = { }
shared.processes = { }
tfmdata.changed = { }
shared.features = features
shared.processes = otf.setfeatures(tfmdata,features)
end
end
containers.write(constructors.cache,cache_id,tfmdata)
end
return tfmdata
end
local function read_from_otf(specification)
local tfmdata = otftotfm(specification)
if tfmdata then
-- this late ? .. needs checking
tfmdata.properties.name = specification.name
tfmdata.properties.sub = specification.sub
--
tfmdata = constructors.scale(tfmdata,specification)
constructors.applymanipulators("otf",tfmdata,specification.features.normal,trace_features,report_otf)
constructors.setname(tfmdata,specification) -- only otf?
fonts.loggers.register(tfmdata,file.extname(specification.filename),specification)
end
return tfmdata
end
local function checkmathsize(tfmdata,mathsize)
local mathdata = tfmdata.shared.rawdata.metadata.math
local mathsize = tonumber(mathsize)
if mathdata then -- we cannot use mathparameters as luatex will complain
local parameters = tfmdata.parameters
parameters.scriptpercentage = mathdata.ScriptPercentScaleDown
parameters.scriptscriptpercentage = mathdata.ScriptScriptPercentScaleDown
parameters.mathsize = mathsize
end
end
registerotffeature {
name = "mathsize",
description = "apply mathsize as specified in the font",
initializers = {
base = checkmathsize,
node = checkmathsize,
}
}
-- helpers
function otf.collectlookups(rawdata,kind,script,language)
local sequences = rawdata.resources.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[default] or features[wildcard])
features = features and (features[language] or features[default] 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
-- readers
local function check_otf(forced,specification,suffix,what)
local name = specification.name
if forced then
name = file.addsuffix(name,suffix,true)
end
local fullname = findbinfile(name,suffix) or ""
if fullname == "" then
fullname = fonts.names.getfilename(name,suffix) or ""
end
if fullname ~= "" then
specification.filename = fullname
specification.format = what
return read_from_otf(specification)
end
end
local function opentypereader(specification,suffix,what)
local forced = specification.forced or ""
if forced == "otf" then
return check_otf(true,specification,forced,"opentype")
elseif forced == "ttf" or forced == "ttc" or forced == "dfont" then
return check_otf(true,specification,forced,"truetype")
else
return check_otf(false,specification,suffix,what)
end
end
readers.opentype = opentypereader
local formats = fonts.formats
formats.otf = "opentype"
formats.ttf = "truetype"
formats.ttc = "truetype"
formats.dfont = "truetype"
function readers.otf (specification) return opentypereader(specification,"otf",formats.otf ) end
function readers.ttf (specification) return opentypereader(specification,"ttf",formats.ttf ) end
function readers.ttc (specification) return opentypereader(specification,"ttf",formats.ttc ) end
function readers.dfont(specification) return opentypereader(specification,"ttf",formats.dfont) end
-- this will be overloaded
function otf.scriptandlanguage(tfmdata,attr)
local properties = tfmdata.properties
return properties.script or "dflt", properties.language or "dflt"
end