diff options
Diffstat (limited to 'tex/context/base/font-otf.lua')
| -rw-r--r-- | tex/context/base/font-otf.lua | 134 |
1 files changed, 97 insertions, 37 deletions
diff --git a/tex/context/base/font-otf.lua b/tex/context/base/font-otf.lua index e7a97c66d..db0118d84 100644 --- a/tex/context/base/font-otf.lua +++ b/tex/context/base/font-otf.lua @@ -12,6 +12,12 @@ if not modules then modules = { } end modules ['font-otf'] = { -- to_table -> totable -- ascent descent +-- to be checked: combinations like: +-- +-- current="ABCD" with [A]=nothing, [BC]=ligature, [D]=single (applied to result of BC so funny index) +-- +-- unlikely but possible + -- more checking against low level calls of functions local utfbyte = utf.byte @@ -54,7 +60,7 @@ local otf = fonts.handlers.otf otf.glists = { "gsub", "gpos" } -otf.version = 2.812 -- beware: also sync font-mis.lua +otf.version = 2.814 -- beware: also sync font-mis.lua otf.cache = containers.define("fonts", "otf", otf.version, true) local hashes = fonts.hashes @@ -283,13 +289,17 @@ local ordered_enhancers = { "check glyphs", "check metadata", - "check extra features", -- after metadata +-- "check extra features", -- after metadata "prepare tounicode", "check encoding", -- moved "add duplicates", + "expand lookups", -- a temp hack awaiting the lua loader + + "check extra features", -- after metadata and duplicates + "cleanup tables", "compact lookups", @@ -386,6 +396,7 @@ function otf.load(filename,sub,featurefile) -- second argument (format) is gone if featurefile then name = name .. "@" .. file.removesuffix(file.basename(featurefile)) end + -- or: sub = tonumber(sub) if sub == "" then sub = false end @@ -476,6 +487,7 @@ function otf.load(filename,sub,featurefile) -- second argument (format) is gone data = { size = size, time = time, + subfont = sub, format = otf_format(filename), featuredata = featurefiles, resources = { @@ -819,35 +831,35 @@ actions["prepare glyphs"] = function(data,filename,raw) glyph = glyph, } descriptions[unicode] = description -local altuni = glyph.altuni -if altuni then - -- local d - for i=1,#altuni do - local a = altuni[i] - local u = a.unicode - if u ~= unicode then - local v = a.variant - if v then - -- tricky: no addition to d? needs checking but in practice such dups are either very simple - -- shapes or e.g cjk with not that many features - 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 - end - -- if d then - -- duplicates[unicode] = d -- is this needed ? - -- end -end + local altuni = glyph.altuni + if altuni then + -- local d + for i=1,#altuni do + local a = altuni[i] + local u = a.unicode + if u ~= unicode then + local v = a.variant + if v then + -- tricky: no addition to d? needs checking but in practice such dups are either very simple + -- shapes or e.g cjk with not that many features + 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 + end + -- if d then + -- duplicates[unicode] = d -- is this needed ? + -- end + end end end else @@ -1494,12 +1506,16 @@ end actions["reorganize lookups"] = function(data,filename,raw) -- we could check for "" and n == 0 -- we prefer the before lookups in a normal order if data.lookups then - local splitter = data.helpers.tounicodetable - local t_u_cache = { } - local s_u_cache = t_u_cache -- string keys - local t_h_cache = { } - local s_h_cache = t_h_cache -- table keys (so we could use one cache) - local r_u_cache = { } -- maybe shared + local helpers = data.helpers + local duplicates = data.resources.duplicates + local splitter = helpers.tounicodetable + local t_u_cache = { } + local s_u_cache = t_u_cache -- string keys + local t_h_cache = { } + local s_h_cache = t_h_cache -- table keys (so we could use one cache) + local r_u_cache = { } -- maybe shared + helpers.matchcache = t_h_cache -- so that we can add duplicates + -- for _, lookup in next, data.lookups do local rules = lookup.rules if rules then @@ -1653,6 +1669,50 @@ actions["reorganize lookups"] = function(data,filename,raw) -- we could check fo end end +actions["expand lookups"] = function(data,filename,raw) -- we could check for "" and n == 0 + if data.lookups then + local cache = data.helpers.matchcache + if cache then + local duplicates = data.resources.duplicates + for key, hash in next, cache do + local done = nil + for key in next, hash do + local unicode = duplicates[key] + if not unicode then + -- no duplicate + elseif type(unicode) == "table" then + -- multiple duplicates + for i=1,#unicode do + local u = unicode[i] + if hash[u] then + -- already in set + elseif done then + done[u] = key + else + done = { [u] = key } + end + end + else + -- one duplicate + if hash[unicode] then + -- already in set + elseif done then + done[unicode] = key + else + done = { [unicode] = key } + end + end + end + if done then + for u in next, done do + hash[u] = true + end + end + end + end + end +end + local function check_variants(unicode,the_variants,splitter,unicodes) local variants = the_variants.variants if variants then -- use splitter |