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if not modules then modules = { } end modules ['s-fonts-features'] = {
version = 1.001,
comment = "companion to s-fonts-features.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
moduledata.fonts = moduledata.fonts or { }
moduledata.fonts.features = moduledata.fonts.features or { }
-- for the moment only otf
local sortedhash = table.sortedhash
local v_yes = interfaces.variables.yes
local v_no = interfaces.variables.no
local c_name = interfaces.constants.name
local NC, NR, bold = context.NC, context.NR, context.bold
function moduledata.fonts.features.showused(specification)
specification = interfaces.checkedspecification(specification)
-- local list = utilities.parsers.settings_to_set(specification.list or "all")
context.starttabulate { "|T|T|T|T|T|" }
context.HL()
NC() bold("feature")
NC()
NC() bold("description")
NC() bold("value")
NC() bold("internal")
NC() NR()
context.HL()
local usedfeatures = fonts.handlers.otf.statistics.usedfeatures
local features = fonts.handlers.otf.tables.features
local descriptions = fonts.handlers.otf.features.descriptions
for feature, keys in sortedhash(usedfeatures) do
-- if list.all or (list.otf and rawget(features,feature)) or (list.extra and rawget(descriptions,feature)) then
local done = false
for k, v in sortedhash(keys) do
if done then
NC()
NC()
NC()
elseif rawget(descriptions,feature) then
NC() context(feature)
NC() context("+") -- extra
NC() context.escaped(descriptions[feature])
done = true
elseif rawget(features,feature) then
NC() context(feature)
NC() -- otf
NC() context.escaped(features[feature])
done = true
else
NC() context(feature)
NC() context("-") -- unknown
NC()
done = true
end
NC() context(k)
NC() context(tostring(v))
NC() NR()
end
-- end
end
context.HL()
context.stoptabulate()
end
local function collectkerns(tfmdata,feature)
local combinations = { }
local resources = tfmdata.resources
local characters = tfmdata.characters
local sequences = resources.sequences
local lookuphash = resources.lookuphash
local feature = feature or "kern"
if sequences then
if true then
for i=1,#sequences do
local sequence = sequences[i]
if sequence.features and sequence.features[feature] then
local steps = sequence.steps
for i=1,#steps do
local step = steps[i]
local format = step.format
for unicode, hash in table.sortedhash(step.coverage) do
local kerns = combinations[unicode]
if not kerns then
kerns = { }
combinations[unicode] = kerns
end
for otherunicode, kern in table.sortedhash(hash) do
if format == "pair" then
local f = kern[1]
local s = kern[2]
if f then
if s then
-- todo
else
if not kerns[otherunicode] and f[3] ~= 0 then
kerns[otherunicode] = f[3]
end
end
elseif s then
-- todo
end
elseif format == "kern" then
if not kerns[otherunicode] and kern ~= 0 then
kerns[otherunicode] = kern
end
end
end
end
end
end
end
end
else -- old loader
for i=1,#sequences do
local sequence = sequences[i]
if sequence.features and sequence.features[feature] then
local lookuplist = sequence.subtables
if lookuplist then
for l=1,#lookuplist do
local lookupname = lookuplist[l]
local lookupdata = lookuphash[lookupname]
for unicode, data in next, lookupdata do
local kerns = combinations[unicode]
if not kerns then
kerns = { }
combinations[unicode] = kerns
end
for otherunicode, kern in next, data do
if not kerns[otherunicode] and kern ~= 0 then
kerns[otherunicode] = kern
end
end
end
end
end
end
end
end
return combinations
end
local showkernpair = context.showkernpair
function moduledata.fonts.features.showbasekerns(specification)
-- assumes that the font is loaded in base mode
specification = interfaces.checkedspecification(specification)
local id, cs = fonts.definers.internal(specification,"<module:fonts:features:font>")
local tfmdata = fonts.hashes.identifiers[id]
local done = false
for unicode, character in sortedhash(tfmdata.characters) do
local kerns = character.kerns
if kerns then
context.par()
for othercode, kern in sortedhash(kerns) do
showkernpair(unicode,kern,othercode)
end
context.par()
done = true
end
end
if not done then
context("no kern pairs found")
context.par()
end
end
function moduledata.fonts.features.showallkerns(specification)
specification = interfaces.checkedspecification(specification)
local id, cs = fonts.definers.internal(specification,"<module:fonts:features:font>")
local tfmdata = fonts.hashes.identifiers[id]
local allkerns = collectkerns(tfmdata)
local characters = tfmdata.characters
local hfactor = tfmdata.parameters.hfactor
if next(allkerns) then
for first, pairs in sortedhash(allkerns) do
context.par()
for second, kern in sortedhash(pairs) do
-- local kerns = characters[first].kerns
-- if not kerns and pairs[second] then
-- -- weird
-- end
showkernpair(first,kern*hfactor,second)
end
context.par()
end
else
context("no kern pairs found")
context.par()
end
end
function moduledata.fonts.features.showfeatureset(specification)
specification = interfaces.checkedspecification(specification)
local name = specification[c_name]
if name then
local s = fonts.specifiers.contextsetups[name]
if s then
local t = table.copy(s)
t.number = nil
if t and next(t) then
context.starttabulate { "|T|T|" }
for k, v in sortedhash(t) do
NC() context(k) NC() context(v == true and v_yes or v == false and v_no or tostring(v)) NC() NR()
end
context.stoptabulate()
end
end
end
end
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