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if not modules then modules = { } end modules ['font-mis'] = {
version = 1.001,
comment = "companion to mtx-fonts",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local next = next
local lower, strip = string.lower, string.strip
-- also used in other scripts so we need to check some tables:
fonts = fonts or { }
fonts.helpers = fonts.helpers or { }
local helpers = fonts.helpers
fonts.handlers = fonts.handlers or { }
local handlers = fonts.handlers
handlers.otf = handlers.otf or { }
local otf = handlers.otf
otf.version = otf.version or 2.751
otf.cache = otf.cache or containers.define("fonts", "otf", otf.version, true)
function otf.loadcached(filename,format,sub)
-- no recache when version mismatch
local name = file.basename(file.removesuffix(filename))
if sub == "" then sub = false end
local hash = name
if sub then
hash = hash .. "-" .. sub
end
hash = containers.cleanname(hash)
local data = containers.read(otf.cache, hash)
if data and not data.verbose then
otf.enhancers.unpack(data)
return data
else
return nil
end
end
local featuregroups = { "gsub", "gpos" }
function fonts.helpers.getfeatures(name,t,script,language) -- maybe per font type
local t = lower(t or (name and file.suffix(name)) or "")
if t == "otf" or t == "ttf" or t == "ttc" or t == "dfont" then
local filename = resolvers.findfile(name,t) or ""
if filename ~= "" then
local data = otf.loadcached(filename)
if data and data.resources and data.resources.features then
return data.resources.features
else
local ff = fontloader.open(filename)
if ff then
local data = fontloader.to_table(ff)
fontloader.close(ff)
local features = { }
for k=1,#featuregroups do
local what = featuregroups[k]
local dw = data[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 dfscripts = df.scripts
for i=1,#dfscripts do
local ds = dfscripts[i]
local scri = strip(lower(ds.script))
local fts = ft[scri] if not fts then fts = {} ft[scri] = fts end
local dslangs = ds.langs
for i=1,#dslangs do
local lang = dslangs[i]
lang = strip(lower(lang))
if scri == script then
if lang == language then
fts[lang] = 'sl'
else
fts[lang] = 's'
end
else
if lang == language then
fts[lang] = 'l'
else
fts[lang] = true
end
end
end
end
end
end
end
end
end
return features
end
end
end
end
return nil, nil
end
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