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Diffstat (limited to 'src/fontloader/misc/fontloader-font-oup.lua')
| -rw-r--r-- | src/fontloader/misc/fontloader-font-oup.lua | 2058 |
1 files changed, 2058 insertions, 0 deletions
diff --git a/src/fontloader/misc/fontloader-font-oup.lua b/src/fontloader/misc/fontloader-font-oup.lua new file mode 100644 index 0000000..b184a7f --- /dev/null +++ b/src/fontloader/misc/fontloader-font-oup.lua @@ -0,0 +1,2058 @@ +if not modules then modules = { } end modules ['font-oup'] = { + 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" +} + +local next, type = next, type +local P, R, S = lpeg.P, lpeg.R, lpeg.S +local lpegmatch = lpeg.match +local insert, remove, copy = table.insert, table.remove, table.copy + +local formatters = string.formatters +local sortedkeys = table.sortedkeys +local sortedhash = table.sortedhash +local tohash = table.tohash + +local report = logs.reporter("otf reader") + +local trace_markwidth = false trackers.register("otf.markwidth",function(v) trace_markwidth = v end) + +local readers = fonts.handlers.otf.readers +local privateoffset = fonts.constructors and fonts.constructors.privateoffset or 0xF0000 -- 0x10FFFF + +local f_private = formatters["P%05X"] +local f_unicode = formatters["U%05X"] +local f_index = formatters["I%05X"] +local f_character_y = formatters["%C"] +local f_character_n = formatters["[ %C ]"] + +local doduplicates = true -- can become an option (pseudo feature) + +local function replaced(list,index,replacement) + if type(list) == "number" then + return replacement + elseif type(replacement) == "table" then + local t = { } + local n = index-1 + for i=1,n do + t[i] = list[i] + end + for i=1,#replacement do + n = n + 1 + t[n] = replacement[i] + end + for i=index+1,#list do + n = n + 1 + t[n] = list[i] + end + else + list[index] = replacement + return list + end +end + +local function unifyresources(fontdata,indices) + local descriptions = fontdata.descriptions + local resources = fontdata.resources + if not descriptions or not resources then + return + end + -- + local variants = fontdata.resources.variants + if variants then + for selector, unicodes in next, variants do + for unicode, index in next, unicodes do + unicodes[unicode] = indices[index] + end + end + end + -- + local function remark(marks) + if marks then + local newmarks = { } + for k, v in next, marks do + local u = indices[k] + if u then + newmarks[u] = v + else + report("discarding mark %i",k) + end + end + return newmarks + end + end + -- + local marks = resources.marks + if marks then + resources.marks = remark(marks) + end + -- + local markclasses = resources.markclasses + if markclasses then + for class, marks in next, markclasses do + markclasses[class] = remark(marks) + end + end + -- + local marksets = resources.marksets + if marksets then + for class, marks in next, marksets do + marksets[class] = remark(marks) + end + end + -- + local done = { } -- we need to deal with shared ! + -- + local duplicates = doduplicates and resources.duplicates + if duplicates and not next(duplicates) then + duplicates = false + end + -- + local function recover(cover) -- can be packed + for i=1,#cover do + local c = cover[i] + if not done[c] then + local t = { } + for k, v in next, c do + t[indices[k]] = v + end + cover[i] = t + done[c] = d + end + end + end + -- + local function recursed(c) -- ligs are not packed + local t = { } + for g, d in next, c do + if type(d) == "table" then + t[indices[g]] = recursed(d) + else + t[g] = indices[d] -- ligature + end + end + return t + end + -- + -- the duplicates need checking (probably only in cjk fonts): currently we only check + -- gsub_single, gsub_alternate, gsub_multiple, gpos_single and gpos_cursive + -- + local function unifythem(sequences) + if not sequences then + return + end + for i=1,#sequences do + local sequence = sequences[i] + local kind = sequence.type + local steps = sequence.steps + local features = sequence.features + if steps then + for i=1,#steps do + local step = steps[i] + if kind == "gsub_single" then + local c = step.coverage + if c then + local t1 = done[c] + if not t1 then + t1 = { } + if duplicates then + for g1, d1 in next, c do + local ug1 = indices[g1] + local ud1 = indices[d1] + t1[ug1] = ud1 + -- + local dg1 = duplicates[ug1] + if dg1 then + for u in next, dg1 do + t1[u] = ud1 + end + end + end + else + for g1, d1 in next, c do + t1[indices[g1]] = indices[d1] + end + end + done[c] = t1 + end + step.coverage = t1 + end + elseif kind == "gpos_pair" then + local c = step.coverage + if c then + local t1 = done[c] + if not t1 then + t1 = { } + for g1, d1 in next, c do + local t2 = done[d1] + if not t2 then + t2 = { } + for g2, d2 in next, d1 do + t2[indices[g2]] = d2 + end + done[d1] = t2 + end + t1[indices[g1]] = t2 + end + done[c] = t1 + end + step.coverage = t1 + end + elseif kind == "gsub_ligature" then + local c = step.coverage + if c then + step.coverage = recursed(c) + end + elseif kind == "gsub_alternate" or kind == "gsub_multiple" then + local c = step.coverage + if c then + local t1 = done[c] + if not t1 then + t1 = { } + if duplicates then + for g1, d1 in next, c do + for i=1,#d1 do + d1[i] = indices[d1[i]] + end + local ug1 = indices[g1] + t1[ug1] = d1 + -- + local dg1 = duplicates[ug1] + if dg1 then + for u in next, dg1 do + t1[u] = copy(d1) + end + end + end + else + for g1, d1 in next, c do + for i=1,#d1 do + d1[i] = indices[d1[i]] + end + t1[indices[g1]] = d1 + end + end + done[c] = t1 + end + step.coverage = t1 + end + elseif kind == "gpos_mark2base" or kind == "gpos_mark2mark" or kind == "gpos_mark2ligature" then + local c = step.coverage + if c then + local t1 = done[c] + if not t1 then + t1 = { } + for g1, d1 in next, c do + t1[indices[g1]] = d1 + end + done[c] = t1 + end + step.coverage = t1 + end + local c = step.baseclasses + if c then + local t1 = done[c] + if not t1 then + for g1, d1 in next, c do + local t2 = done[d1] + if not t2 then + t2 = { } + for g2, d2 in next, d1 do + t2[indices[g2]] = d2 + end + done[d1] = t2 + end + c[g1] = t2 + end + done[c] = c + end + end + elseif kind == "gpos_single" then + local c = step.coverage + if c then + local t1 = done[c] + if not t1 then + t1 = { } + if duplicates then + for g1, d1 in next, c do + local ug1 = indices[g1] + t1[ug1] = d1 + -- + local dg1 = duplicates[ug1] + if dg1 then + for u in next, dg1 do + t1[u] = d1 + end + end + end + else + for g1, d1 in next, c do + t1[indices[g1]] = d1 + end + end + done[c] = t1 + end + step.coverage = t1 + end + elseif kind == "gpos_cursive" then + local c = step.coverage + if c then + local t1 = done[c] + if not t1 then + t1 = { } + if duplicates then + for g1, d1 in next, c do + local ug1 = indices[g1] + t1[ug1] = d1 + -- + local dg1 = duplicates[ug1] + if dg1 then + -- probably needs a bit more + for u in next, dg1 do + t1[u] = copy(d1) + end + end + end + else + for g1, d1 in next, c do + t1[indices[g1]] = d1 + end + end + done[c] = t1 + end + step.coverage = t1 + end + end + -- + local rules = step.rules + if rules then + for i=1,#rules do + local rule = rules[i] + -- + local before = rule.before if before then recover(before) end + local after = rule.after if after then recover(after) end + local current = rule.current if current then recover(current) end + -- + local replacements = rule.replacements + if replacements then + if not done[replacements] then + local r = { } + for k, v in next, replacements do + r[indices[k]] = indices[v] + end + rule.replacements = r + done[replacements] = r + end + end + end + end + end + end + end + end + -- + unifythem(resources.sequences) + unifythem(resources.sublookups) +end + +local function copyduplicates(fontdata) + if doduplicates then + local descriptions = fontdata.descriptions + local resources = fontdata.resources + local duplicates = resources.duplicates + if duplicates then + for u, d in next, duplicates do + local du = descriptions[u] + if du then + local t = { f_character_y(u), "@", f_index(du.index), "->" } + for u in next, d do + if descriptions[u] then + t[#t+1] = f_character_n(u) + else + local c = copy(du) + -- c.unicode = u -- maybe + descriptions[u] = c + t[#t+1] = f_character_y(u) + end + end + report("duplicates: % t",t) + else + -- what a mess + end + end + end + end +end + +local ignore = { -- should we fix them? + ["notdef"] = true, + [".notdef"] = true, + ["null"] = true, + [".null"] = true, + ["nonmarkingreturn"] = true, +} + + +local function checklookups(fontdata,missing,nofmissing) + local descriptions = fontdata.descriptions + local resources = fontdata.resources + if missing and nofmissing and nofmissing <= 0 then + return + end + -- + local singles = { } + local alternates = { } + local ligatures = { } + + if not missing then + missing = { } + nofmissing = 0 + for u, d in next, descriptions do + if not d.unicode then + nofmissing = nofmissing + 1 + missing[u] = true + end + end + end + + local function collectthem(sequences) + if not sequences then + return + end + for i=1,#sequences do + local sequence = sequences[i] + local kind = sequence.type + local steps = sequence.steps + if steps then + for i=1,#steps do + local step = steps[i] + if kind == "gsub_single" then + local c = step.coverage + if c then + singles[#singles+1] = c + end + elseif kind == "gsub_alternate" then + local c = step.coverage + if c then + alternates[#alternates+1] = c + end + elseif kind == "gsub_ligature" then + local c = step.coverage + if c then + ligatures[#ligatures+1] = c + end + end + end + end + end + end + + collectthem(resources.sequences) + collectthem(resources.sublookups) + + local loops = 0 + while true do + loops = loops + 1 + local old = nofmissing + for i=1,#singles do + local c = singles[i] + for g1, g2 in next, c do + if missing[g1] then + local u2 = descriptions[g2].unicode + if u2 then + missing[g1] = false + descriptions[g1].unicode = u2 + nofmissing = nofmissing - 1 + end + end + if missing[g2] then + local u1 = descriptions[g1].unicode + if u1 then + missing[g2] = false + descriptions[g2].unicode = u1 + nofmissing = nofmissing - 1 + end + end + end + end + for i=1,#alternates do + local c = alternates[i] + -- maybe first a g1 loop and then a g2 + for g1, d1 in next, c do + if missing[g1] then + for i=1,#d1 do + local g2 = d1[i] + local u2 = descriptions[g2].unicode + if u2 then + missing[g1] = false + descriptions[g1].unicode = u2 + nofmissing = nofmissing - 1 + end + end + end + if not missing[g1] then + for i=1,#d1 do + local g2 = d1[i] + if missing[g2] then + local u1 = descriptions[g1].unicode + if u1 then + missing[g2] = false + descriptions[g2].unicode = u1 + nofmissing = nofmissing - 1 + end + end + end + end + end + end + if nofmissing <= 0 then + report("all done in %s loops",loops) + return + elseif old == nofmissing then + break + end + end + + local t, n -- no need to insert/remove and allocate many times + + local function recursed(c) + for g, d in next, c do + if g ~= "ligature" then + local u = descriptions[g].unicode + if u then + n = n + 1 + t[n] = u + recursed(d) + n = n - 1 + end + elseif missing[d] then + local l = { } + local m = 0 + for i=1,n do + local u = t[i] + if type(u) == "table" then + for i=1,#u do + m = m + 1 + l[m] = u[i] + end + else + m = m + 1 + l[m] = u + end + end + missing[d] = false + descriptions[d].unicode = l + nofmissing = nofmissing - 1 + end + end + end + + if nofmissing > 0 then + t = { } + n = 0 + local loops = 0 + while true do + loops = loops + 1 + local old = nofmissing + for i=1,#ligatures do + recursed(ligatures[i]) + end + if nofmissing <= 0 then + report("all done in %s loops",loops) + return + elseif old == nofmissing then + break + end + end + t = nil + n = 0 + end + + if nofmissing > 0 then + local done = { } + for i, r in next, missing do + if r then + local name = descriptions[i].name or f_index(i) + if not ignore[name] then + done[#done+1] = name + end + end + end + if #done > 0 then + table.sort(done) + report("not unicoded: % t",done) + end + end +end + +local function unifymissing(fontdata) + if not fonts.mappings then + require("font-map") + require("font-agl") + end + local unicodes = { } + local private = fontdata.private + local resources = fontdata.resources + resources.unicodes = unicodes + for unicode, d in next, fontdata.descriptions do + if unicode < privateoffset then + local name = d.name + if name then + unicodes[name] = unicode + end + end + end + fonts.mappings.addtounicode(fontdata,fontdata.filename,checklookups) + resources.unicodes = nil +end + +local function unifyglyphs(fontdata,usenames) + local private = fontdata.private or privateoffset + local glyphs = fontdata.glyphs + local indices = { } + local descriptions = { } + local names = usenames and { } + local resources = fontdata.resources + local zero = glyphs[0] + local zerocode = zero.unicode + if not zerocode then + zerocode = private + zero.unicode = zerocode + private = private + 1 + end + descriptions[zerocode] = zero + if names then + local name = glyphs[0].name or f_private(zerocode) + indices[0] = name + names[name] = zerocode + else + indices[0] = zerocode + end + -- + for index=1,#glyphs do + local glyph = glyphs[index] + local unicode = glyph.unicode -- this is the primary one + if not unicode then + -- report("assigning private unicode %U to glyph indexed %05X (%s)",private,index,"unset") + unicode = private + -- glyph.unicode = -1 + if names then + local name = glyph.name or f_private(unicode) + indices[index] = name + names[name] = unicode + else + indices[index] = unicode + end + private = private + 1 + elseif descriptions[unicode] then + -- real weird + report("assigning private unicode %U to glyph indexed %05X (%C)",private,index,unicode) + unicode = private + -- glyph.unicode = -1 + if names then + local name = glyph.name or f_private(unicode) + indices[index] = name + names[name] = unicode + else + indices[index] = unicode + end + private = private + 1 + else + if names then + local name = glyph.name or f_unicode(unicode) + indices[index] = name + names[name] = unicode + else + indices[index] = unicode + end + end + descriptions[unicode] = glyph + end + -- + for index=1,#glyphs do + local math = glyphs[index].math + if math then + local list = math.vparts + if list then + for i=1,#list do local l = list[i] l.glyph = indices[l.glyph] end + end + local list = math.hparts + if list then + for i=1,#list do local l = list[i] l.glyph = indices[l.glyph] end + end + local list = math.vvariants + if list then + -- for i=1,#list do local l = list[i] l.glyph = indices[l.glyph] end + for i=1,#list do list[i] = indices[list[i]] end + end + local list = math.hvariants + if list then + -- for i=1,#list do local l = list[i] l.glyph = indices[l.glyph] end + for i=1,#list do list[i] = indices[list[i]] end + end + end + end + -- + fontdata.private = private + fontdata.glyphs = nil + fontdata.names = names + fontdata.descriptions = descriptions + fontdata.hashmethod = hashmethod + -- + return indices, names +end + +local p_bogusname = ( + (P("uni") + P("UNI") + P("Uni") + P("U") + P("u")) * S("Xx")^0 * R("09","AF")^1 + + (P("identity") + P("Identity") + P("IDENTITY")) * R("09","AF")^1 + + (P("index") + P("Index") + P("INDEX")) * R("09")^1 +) * P(-1) + +local function stripredundant(fontdata) + local descriptions = fontdata.descriptions + if descriptions then + local n = 0 + local c = 0 + for unicode, d in next, descriptions do + local name = d.name + if name and lpegmatch(p_bogusname,name) then + d.name = nil + n = n + 1 + end + if d.class == "base" then + d.class = nil + c = c + 1 + end + end + if n > 0 then + report("%s bogus names removed (verbose unicode)",n) + end + if c > 0 then + report("%s base class tags removed (default is base)",c) + end + end +end + +function readers.rehash(fontdata,hashmethod) -- TODO: combine loops in one + if not (fontdata and fontdata.glyphs) then + return + end + if hashmethod == "indices" then + fontdata.hashmethod = "indices" + elseif hashmethod == "names" then + fontdata.hashmethod = "names" + local indices = unifyglyphs(fontdata,true) + unifyresources(fontdata,indices) + copyduplicates(fontdata) + unifymissing(fontdata) + -- stripredundant(fontdata) + else + fontdata.hashmethod = "unicode" + local indices = unifyglyphs(fontdata) + unifyresources(fontdata,indices) + copyduplicates(fontdata) + unifymissing(fontdata) + stripredundant(fontdata) + end +end + +function readers.checkhash(fontdata) + local hashmethod = fontdata.hashmethod + if hashmethod == "unicodes" then + fontdata.names = nil -- just to be sure + elseif hashmethod == "names" and fontdata.names then + unifyresources(fontdata,fontdata.names) + copyduplicates(fontdata) + fontdata.hashmethod = "unicode" + fontdata.names = nil -- no need for it + else + readers.rehash(fontdata,"unicode") + end +end + +function readers.addunicodetable(fontdata) + local resources = fontdata.resources + local unicodes = resources.unicodes + if not unicodes then + local descriptions = fontdata.descriptions + if descriptions then + unicodes = { } + resources.unicodes = unicodes + for u, d in next, descriptions do + local n = d.name + if n then + unicodes[n] = u + end + end + end + end +end + +-- for the moment here: + +local concat, sort = table.concat, table.sort +local next, type, tostring = next, type, tostring + +local criterium = 1 +local threshold = 0 + +local trace_packing = false trackers.register("otf.packing", function(v) trace_packing = v end) +local trace_loading = false trackers.register("otf.loading", function(v) trace_loading = v end) + +local report_otf = logs.reporter("fonts","otf loading") + +local function tabstr_normal(t) + local s = { } + local n = 0 + for k, v in next, t do + n = n + 1 + if type(v) == "table" then + s[n] = k .. ">" .. tabstr_normal(v) + elseif v == true then + s[n] = k .. "+" -- "=true" + elseif v then + s[n] = k .. "=" .. v + else + s[n] = k .. "-" -- "=false" + end + end + if n == 0 then + return "" + elseif n == 1 then + return s[1] + else + sort(s) -- costly but needed (occasional wrong hit otherwise) + return concat(s,",") + end +end + +local function tabstr_flat(t) + local s = { } + local n = 0 + for k, v in next, t do + n = n + 1 + s[n] = k .. "=" .. v + end + if n == 0 then + return "" + elseif n == 1 then + return s[1] + else + sort(s) -- costly but needed (occasional wrong hit otherwise) + return concat(s,",") + end +end + +local function tabstr_mixed(t) -- indexed + local s = { } + local n = #t + if n == 0 then + return "" + elseif n == 1 then + local k = t[1] + if k == true then + return "++" -- we need to distinguish from "true" + elseif k == false then + return "--" -- we need to distinguish from "false" + else + return tostring(k) -- number or string + end + else + for i=1,n do + local k = t[i] + if k == true then + s[i] = "++" -- we need to distinguish from "true" + elseif k == false then + s[i] = "--" -- we need to distinguish from "false" + else + s[i] = k -- number or string + end + end + return concat(s,",") + end +end + +local function tabstr_boolean(t) + local s = { } + local n = 0 + for k, v in next, t do + n = n + 1 + if v then + s[n] = k .. "+" + else + s[n] = k .. "-" + end + end + if n == 0 then + return "" + elseif n == 1 then + return s[1] + else + sort(s) -- costly but needed (occasional wrong hit otherwise) + return concat(s,",") + end +end + +-- beware: we cannot unpack and repack the same table because then sharing +-- interferes (we could catch this if needed) .. so for now: save, reload +-- and repack in such cases (never needed anyway) .. a tricky aspect is that +-- we then need to sort more thanks to random hashing + +function readers.pack(data) + + if data then + + local h, t, c = { }, { }, { } + local hh, tt, cc = { }, { }, { } + local nt, ntt = 0, 0 + + local function pack_normal(v) + local tag = tabstr_normal(v) + local ht = h[tag] + if ht then + c[ht] = c[ht] + 1 + return ht + else + nt = nt + 1 + t[nt] = v + h[tag] = nt + c[nt] = 1 + return nt + end + end + + local function pack_flat(v) + local tag = tabstr_flat(v) + local ht = h[tag] + if ht then + c[ht] = c[ht] + 1 + return ht + else + nt = nt + 1 + t[nt] = v + h[tag] = nt + c[nt] = 1 + return nt + end + end + + local function pack_boolean(v) + local tag = tabstr_boolean(v) + local ht = h[tag] + if ht then + c[ht] = c[ht] + 1 + return ht + else + nt = nt + 1 + t[nt] = v + h[tag] = nt + c[nt] = 1 + return nt + end + end + + local function pack_indexed(v) + local tag = concat(v," ") + local ht = h[tag] + if ht then + c[ht] = c[ht] + 1 + return ht + else + nt = nt + 1 + t[nt] = v + h[tag] = nt + c[nt] = 1 + return nt + end + end + + local function pack_mixed(v) + local tag = tabstr_mixed(v) + local ht = h[tag] + if ht then + c[ht] = c[ht] + 1 + return ht + else + nt = nt + 1 + t[nt] = v + h[tag] = nt + c[nt] = 1 + return nt + end + end + + local function pack_final(v) + -- v == number + if c[v] <= criterium then + return t[v] + else + -- compact hash + local hv = hh[v] + if hv then + return hv + else + ntt = ntt + 1 + tt[ntt] = t[v] + hh[v] = ntt + cc[ntt] = c[v] + return ntt + end + end + end + + local function success(stage,pass) + if nt == 0 then + if trace_loading or trace_packing then + report_otf("pack quality: nothing to pack") + end + return false + elseif nt >= threshold then + local one, two, rest = 0, 0, 0 + if pass == 1 then + for k,v in next, c do + if v == 1 then + one = one + 1 + elseif v == 2 then + two = two + 1 + else + rest = rest + 1 + end + end + else + for k,v in next, cc do + if v > 20 then + rest = rest + 1 + elseif v > 10 then + two = two + 1 + else + one = one + 1 + end + end + data.tables = tt + end + if trace_loading or trace_packing then + report_otf("pack quality: stage %s, pass %s, %s packed, 1-10:%s, 11-20:%s, rest:%s (criterium: %s)", + stage, pass, one+two+rest, one, two, rest, criterium) + end + return true + else + if trace_loading or trace_packing then + report_otf("pack quality: stage %s, pass %s, %s packed, aborting pack (threshold: %s)", + stage, pass, nt, threshold) + end + return false + end + end + + local function packers(pass) + if pass == 1 then + return pack_normal, pack_indexed, pack_flat, pack_boolean, pack_mixed + else + return pack_final, pack_final, pack_final, pack_final, pack_final + end + end + + local resources = data.resources + local sequences = resources.sequences + local sublookups = resources.sublookups + local features = resources.features + + local chardata = characters and characters.data + local descriptions = data.descriptions or data.glyphs + + if not descriptions then + return + end + + -- + + for pass=1,2 do + + if trace_packing then + report_otf("start packing: stage 1, pass %s",pass) + end + + local pack_normal, pack_indexed, pack_flat, pack_boolean, pack_mixed = packers(pass) + + for unicode, description in next, descriptions do + local boundingbox = description.boundingbox + if boundingbox then + description.boundingbox = pack_indexed(boundingbox) + end + local math = description.math + if math then + local kerns = math.kerns + if kerns then + for tag, kern in next, kerns do + kerns[tag] = pack_normal(kern) + end + end + end + end + + local function packthem(sequences) + for i=1,#sequences do + local sequence = sequences[i] + local kind = sequence.type + local steps = sequence.steps + local order = sequence.order + local features = sequence.features + local flags = sequence.flags + if steps then + for i=1,#steps do + local step = steps[i] + if kind == "gpos_pair" then + local c = step.coverage + if c then + if step.format == "kern" then + for g1, d1 in next, c do + c[g1] = pack_normal(d1) + end + else + for g1, d1 in next, c do + for g2, d2 in next, d1 do + local f = d2[1] if f then d2[1] = pack_indexed(f) end + local s = d2[2] if s then d2[2] = pack_indexed(s) end + end + end + end + end + elseif kind == "gpos_single" then + local c = step.coverage + if c then + if step.format == "kern" then + step.coverage = pack_normal(c) + else + for g1, d1 in next, c do + c[g1] = pack_indexed(d1) + end + end + end + elseif kind == "gpos_cursive" then + local c = step.coverage + if c then + for g1, d1 in next, c do + local f = d1[2] if f then d1[2] = pack_indexed(f) end + local s = d1[3] if s then d1[3] = pack_indexed(s) end + end + end + elseif kind == "gpos_mark2base" or kind == "gpos_mark2mark" then + local c = step.baseclasses + if c then + for g1, d1 in next, c do + for g2, d2 in next, d1 do + d1[g2] = pack_indexed(d2) + end + end + end + local c = step.coverage + if c then + for g1, d1 in next, c do + d1[2] = pack_indexed(d1[2]) + end + end + elseif kind == "gpos_mark2ligature" then + local c = step.baseclasses + if c then + for g1, d1 in next, c do + for g2, d2 in next, d1 do + for g3, d3 in next, d2 do + d2[g3] = pack_indexed(d3) + end + end + end + end + local c = step.coverage + if c then + for g1, d1 in next, c do + d1[2] = pack_indexed(d1[2]) + end + end + end + -- if ... chain ... + local rules = step.rules + if rules then + for i=1,#rules do + local rule = rules[i] + local r = rule.before if r then for i=1,#r do r[i] = pack_boolean(r[i]) end end + local r = rule.after if r then for i=1,#r do r[i] = pack_boolean(r[i]) end end + local r = rule.current if r then for i=1,#r do r[i] = pack_boolean(r[i]) end end + local r = rule.replacements if r then rule.replacements = pack_flat (r) end -- can have holes + end + end + end + end + if order then + sequence.order = pack_indexed(order) + end + if features then + for script, feature in next, features do + features[script] = pack_normal(feature) + end + end + if flags then + sequence.flags = pack_normal(flags) + end + end + end + + if sequences then + packthem(sequences) + end + + if sublookups then + packthem(sublookups) + end + + if features then + for k, list in next, features do + for feature, spec in next, list do + list[feature] = pack_normal(spec) + end + end + end + + if not success(1,pass) then + return + end + + end + + if nt > 0 then + + for pass=1,2 do + + if trace_packing then + report_otf("start packing: stage 2, pass %s",pass) + end + + local pack_normal, pack_indexed, pack_flat, pack_boolean, pack_mixed = packers(pass) + + for unicode, description in next, descriptions do + local math = description.math + if math then + local kerns = math.kerns + if kerns then + math.kerns = pack_normal(kerns) + end + end + end + + local function packthem(sequences) + for i=1,#sequences do + local sequence = sequences[i] + local kind = sequence.type + local steps = sequence.steps + local features = sequence.features + if steps then + for i=1,#steps do + local step = steps[i] + if kind == "gpos_pair" then + local c = step.coverage + if c then + if step.format == "kern" then + -- todo ! + else + for g1, d1 in next, c do + for g2, d2 in next, d1 do + d1[g2] = pack_normal(d2) + end + end + end + end +-- elseif kind == "gpos_mark2base" or kind == "gpos_mark2mark" or kind == "gpos_mark2ligature" then +-- local c = step.baseclasses +-- for k, v in next, c do +-- c[k] = pack_normal(v) +-- end + end + local rules = step.rules + if rules then + for i=1,#rules do + local rule = rules[i] + local r = rule.before if r then rule.before = pack_normal(r) end + local r = rule.after if r then rule.after = pack_normal(r) end + local r = rule.current if r then rule.current = pack_normal(r) end + end + end + end + end + if features then + sequence.features = pack_normal(features) + end + end + end + if sequences then + packthem(sequences) + end + if sublookups then + packthem(sublookups) + end + -- features + if not success(2,pass) then + -- return + end + end + + for pass=1,2 do + if trace_packing then + report_otf("start packing: stage 3, pass %s",pass) + end + + local pack_normal, pack_indexed, pack_flat, pack_boolean, pack_mixed = packers(pass) + + local function packthem(sequences) + for i=1,#sequences do + local sequence = sequences[i] + local kind = sequence.type + local steps = sequence.steps + local features = sequence.features + if steps then + for i=1,#steps do + local step = steps[i] + if kind == "gpos_pair" then + local c = step.coverage + if c then + if step.format == "kern" then + -- todo ! + else + for g1, d1 in next, c do + c[g1] = pack_normal(d1) + end + end + end + end + end + end + end + end + + if sequences then + packthem(sequences) + end + if sublookups then + packthem(sublookups) + end + + end + + end + + end +end + +local unpacked_mt = { + __index = + function(t,k) + t[k] = false + return k -- next time true + end +} + +function readers.unpack(data) + + if data then + local tables = data.tables + if tables then + local resources = data.resources + local descriptions = data.descriptions or data.glyphs + local sequences = resources.sequences + local sublookups = resources.sublookups + local features = resources.features + local unpacked = { } + setmetatable(unpacked,unpacked_mt) + for unicode, description in next, descriptions do + local tv = tables[description.boundingbox] + if tv then + description.boundingbox = tv + end + local math = description.math + if math then + local kerns = math.kerns + if kerns then + local tm = tables[kerns] + if tm then + math.kerns = tm + kerns = unpacked[tm] + end + if kerns then + for k, kern in next, kerns do + local tv = tables[kern] + if tv then + kerns[k] = tv + end + end + end + end + end + end + + local function unpackthem(sequences) + for i=1,#sequences do + local sequence = sequences[i] + local kind = sequence.type + local steps = sequence.steps + local order = sequence.order + local features = sequence.features + local flags = sequence.flags + local markclass = sequence.markclass + if steps then + for i=1,#steps do + local step = steps[i] + if kind == "gpos_pair" then + local c = step.coverage + if c then + if step.format == "kern" then + for g1, d1 in next, c do + local tv = tables[d1] + if tv then + c[g1] = tv + end + end + else + for g1, d1 in next, c do + local tv = tables[d1] + if tv then + c[g1] = tv + d1 = tv + end + for g2, d2 in next, d1 do + local tv = tables[d2] + if tv then + d1[g2] = tv + d2 = tv + end + local f = tables[d2[1]] if f then d2[1] = f end + local s = tables[d2[2]] if s then d2[2] = s end + end + end + end + end + elseif kind == "gpos_single" then + local c = step.coverage + if c then + if step.format == "kern" then + local tv = tables[c] + if tv then + step.coverage = tv + end + else + for g1, d1 in next, c do + local tv = tables[d1] + if tv then + c[g1] = tv + end + end + end + end + elseif kind == "gpos_cursive" then + local c = step.coverage + if c then + for g1, d1 in next, c do + local f = tables[d1[2]] if f then d1[2] = f end + local s = tables[d1[3]] if s then d1[3] = s end + end + end + elseif kind == "gpos_mark2base" or kind == "gpos_mark2mark" then + local c = step.baseclasses + if c then +-- for k, v in next, c do +-- local tv = tables[v] +-- if tv then +-- c[k] = tv +-- end +-- end + for g1, d1 in next, c do + for g2, d2 in next, d1 do + local tv = tables[d2] + if tv then + d1[g2] = tv + end + end + end + end + local c = step.coverage + if c then + for g1, d1 in next, c do + local tv = tables[d1[2]] + if tv then + d1[2] = tv + end + end + end + elseif kind == "gpos_mark2ligature" then + local c = step.baseclasses + if c then +-- for k, v in next, c do +-- local tv = tables[v] +-- if tv then +-- c[k] = tv +-- end +-- end + for g1, d1 in next, c do + for g2, d2 in next, d1 do + for g3, d3 in next, d2 do + local tv = tables[d2[g3]] + if tv then + d2[g3] = tv + end + end + end + end + end + local c = step.coverage + if c then + for g1, d1 in next, c do + local tv = tables[d1[2]] + if tv then + d1[2] = tv + end + end + end + end + local rules = step.rules + if rules then + for i=1,#rules do + local rule = rules[i] + local before = rule.before + if before then + local tv = tables[before] + if tv then + rule.before = tv + before = tv + end + for i=1,#before do + local tv = tables[before[i]] + if tv then + before[i] = tv + end + end + end + local after = rule.after + if after then + local tv = tables[after] + if tv then + rule.after = tv + after = tv + end + for i=1,#after do + local tv = tables[after[i]] + if tv then + after[i] = tv + end + end + end + local current = rule.current + if current then + local tv = tables[current] + if tv then + rule.current = tv + current = tv + end + for i=1,#current do + local tv = tables[current[i]] + if tv then + current[i] = tv + end + end + end + local replacements = rule.replacements + if replacements then + local tv = tables[replace] + if tv then + rule.replacements = tv + end + end + end + end + end + end + if features then + local tv = tables[features] + if tv then + sequence.features = tv + features = tv + end + for script, feature in next, features do + local tv = tables[feature] + if tv then + features[script] = tv + end + end + end + if order then + local tv = tables[order] + if tv then + sequence.order = tv + end + end + if flags then + local tv = tables[flags] + if tv then + sequence.flags = tv + end + end + end + end + + if sequences then + unpackthem(sequences) + end + + if sublookups then + unpackthem(sublookups) + end + + if features then + for k, list in next, features do + for feature, spec in next, list do + local tv = tables[spec] + if tv then + list[feature] = tv + end + end + end + end + + data.tables = nil + end + end +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 +} + +local function sameformat(sequence,steps,first,nofsteps,kind) + return true +end + +local function mergesteps_1(lookup,strict) + local steps = lookup.steps + local nofsteps = lookup.nofsteps + local first = steps[1] + if strict then + local f = first.format + for i=2,nofsteps do + if steps[i].format ~= f then + report("not merging %a steps of %a lookup %a, different formats",nofsteps,lookup.type,lookup.name) + return 0 + end + end + end + report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name) + local target = first.coverage + for i=2,nofsteps do + for k, v in next, steps[i].coverage do + if not target[k] then + target[k] = v + end + end + end + lookup.nofsteps = 1 + lookup.merged = true + lookup.steps = { first } + return nofsteps - 1 +end + + +local function mergesteps_2(lookup,strict) -- pairs + local steps = lookup.steps + local nofsteps = lookup.nofsteps + local first = steps[1] + if strict then + local f = first.format + for i=2,nofsteps do + if steps[i].format ~= f then + report("not merging %a steps of %a lookup %a, different formats",nofsteps,lookup.type,lookup.name) + return 0 + end + end + end + report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name) + local target = first.coverage + for i=2,nofsteps do + for k, v in next, steps[i].coverage do + local tk = target[k] + if tk then + for k, v in next, v do + if not tk[k] then + tk[k] = v + end + end + else + target[k] = v + end + end + end + lookup.nofsteps = 1 + lookup.steps = { first } + return nofsteps - 1 +end + + +local function mergesteps_3(lookup,strict) -- marks + local steps = lookup.steps + local nofsteps = lookup.nofsteps + local first = steps[1] + report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name) + local baseclasses = { } + local coverage = { } + local used = { } + for i=1,nofsteps do + local offset = i*10 + local step = steps[i] + for k, v in sortedhash(step.baseclasses) do + baseclasses[offset+k] = v + end + for k, v in next, step.coverage do + local tk = coverage[k] + if tk then + for k, v in next, v do + if not tk[k] then + tk[k] = v + local c = offset + v[1] + v[1] = c + if not used[c] then + used[c] = true + end + end + end + else + coverage[k] = v + local c = offset + v[1] + v[1] = c + if not used[c] then + used[c] = true + end + end + end + end + for k, v in next, baseclasses do + if not used[k] then + baseclasses[k] = nil + report("discarding not used baseclass %i",k) + end + end + first.baseclasses = baseclasses + first.coverage = coverage + lookup.nofsteps = 1 + lookup.steps = { first } + return nofsteps - 1 +end + +local function nested(old,new) + for k, v in next, old do + if k == "ligature" then + if not new.ligature then + new.ligature = v + end + else + local n = new[k] + if n then + nested(v,n) + else + new[k] = v + end + end + end +end + +local function mergesteps_4(lookup) -- ligatures + local steps = lookup.steps + local nofsteps = lookup.nofsteps + local first = steps[1] + report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name) + local target = first.coverage + for i=2,nofsteps do + for k, v in next, steps[i].coverage do + local tk = target[k] + if tk then + nested(v,tk) + else + target[k] = v + end + end + end + lookup.nofsteps = 1 + lookup.steps = { first } + return nofsteps - 1 +end + +local function checkkerns(lookup) + local steps = lookup.steps + local nofsteps = lookup.nofsteps + for i=1,nofsteps do + local step = steps[i] + if step.format == "pair" then + local coverage = step.coverage + local kerns = true + for g1, d1 in next, coverage do + if d1[1] ~= 0 or d1[2] ~= 0 or d1[4] ~= 0 then + kerns = false + break + end + end + if kerns then + report("turning pairs of step %a of %a lookup %a into kerns",i,lookup.type,lookup.name) + for g1, d1 in next, coverage do + coverage[g1] = d1[3] + end + step.format = "kern" + end + end + end +end + +local function checkpairs(lookup) + local steps = lookup.steps + local nofsteps = lookup.nofsteps + local kerned = 0 + for i=1,nofsteps do + local step = steps[i] + if step.format == "pair" then + local coverage = step.coverage + local kerns = true + for g1, d1 in next, coverage do + for g2, d2 in next, d1 do + if d2[2] then + kerns = false + break + else + local v = d2[1] + if v[1] ~= 0 or v[2] ~= 0 or v[4] ~= 0 then + kerns = false + break + end + end + end + end + if kerns then + report("turning pairs of step %a of %a lookup %a into kerns",i,lookup.type,lookup.name) + for g1, d1 in next, coverage do + for g2, d2 in next, d1 do + d1[g2] = d2[1][3] + end + end + step.format = "kern" + kerned = kerned + 1 + end + end + end + return kerned +end + +function readers.compact(data) + if not data or data.compacted then + return + else + data.compacted = true + end + local resources = data.resources + local merged = 0 + local kerned = 0 + local allsteps = 0 + local function compact(what) + local lookups = resources[what] + if lookups then + for i=1,#lookups do + local lookup = lookups[i] + local nofsteps = lookup.nofsteps + allsteps = allsteps + nofsteps + if nofsteps > 1 then + local kind = lookup.type + if kind == "gsub_single" or kind == "gsub_alternate" or kind == "gsub_multiple" then + merged = merged + mergesteps_1(lookup) + elseif kind == "gsub_ligature" then + merged = merged + mergesteps_4(lookup) + elseif kind == "gpos_single" then + merged = merged + mergesteps_1(lookup,true) + checkkerns(lookup) + elseif kind == "gpos_pair" then + merged = merged + mergesteps_2(lookup,true) + kerned = kerned + checkpairs(lookup) + elseif kind == "gpos_cursive" then + merged = merged + mergesteps_2(lookup) + elseif kind == "gpos_mark2mark" or kind == "gpos_mark2base" or kind == "gpos_mark2ligature" then + merged = merged + mergesteps_3(lookup) + end + end + end + else + report("no lookups in %a",what) + end + end + compact("sequences") + compact("sublookups") + if merged > 0 then + report("%i steps of %i removed due to merging",merged,allsteps) + end + if kerned > 0 then + report("%i steps of %i steps turned from pairs into kerns",kerned,allsteps) + end +end + +function readers.expand(data) + if not data or data.expanded then + return + else + data.expanded = true + end + local resources = data.resources + local sublookups = resources.sublookups + local sequences = resources.sequences -- were one level up + local markclasses = resources.markclasses + local descriptions = data.descriptions + if descriptions then + local defaultwidth = resources.defaultwidth or 0 + local defaultheight = resources.defaultheight or 0 + local defaultdepth = resources.defaultdepth or 0 + local basename = trace_markwidth and file.basename(resources.filename) + for u, d in next, descriptions do + local bb = d.boundingbox + local wd = d.width + if not wd then + -- or bb? + d.width = defaultwidth + elseif trace_markwidth and wd ~= 0 and d.class == "mark" then + report("mark %a with width %b found in %a",d.name or "<noname>",wd,basename) + end + if bb then + local ht = bb[4] + local dp = -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 + local function expandlookups(sequences) + if sequences then + -- we also need to do sublookups + for i=1,#sequences do + local sequence = sequences[i] + local steps = sequence.steps + if steps then + local kind = sequence.type + local markclass = sequence.markclass + if markclass then + if not markclasses then + report_warning("missing markclasses") + sequence.markclass = false + else + sequence.markclass = markclasses[markclass] + end + end + for i=1,sequence.nofsteps do + local step = steps[i] + local baseclasses = step.baseclasses + if baseclasses then + local coverage = step.coverage + for k, v in next, coverage do + v[1] = baseclasses[v[1]] -- slot 1 is a placeholder + end + elseif kind == "gpos_cursive" then + local coverage = step.coverage + for k, v in next, coverage do + v[1] = coverage -- slot 1 is a placeholder + end + end + local rules = step.rules + if rules then + local rulehash = { } + local rulesize = 0 + local coverage = { } + local lookuptype = sequence.type + step.coverage = coverage -- combined hits + for nofrules=1,#rules do + local rule = rules[nofrules] + local current = rule.current + local before = rule.before + local after = rule.after + local replacements = rule.replacements or false + local sequence = { } + local nofsequences = 0 + if before then + for n=1,#before do + nofsequences = nofsequences + 1 + sequence[nofsequences] = before[n] + end + end + local start = nofsequences + 1 + for n=1,#current do + nofsequences = nofsequences + 1 + sequence[nofsequences] = current[n] + end + local stop = nofsequences + if after then + for n=1,#after do + nofsequences = nofsequences + 1 + sequence[nofsequences] = after[n] + end + end + local lookups = rule.lookups or false + local subtype = nil + if lookups then + for k, v in next, lookups do + local lookup = sublookups[v] + if lookup then + lookups[k] = lookup + if not subtype then + subtype = lookup.type + end + else + -- already expanded + end + end + end + if sequence[1] then -- we merge coverage into one + rulesize = rulesize + 1 + rulehash[rulesize] = { + nofrules, -- 1 + lookuptype, -- 2 + sequence, -- 3 + start, -- 4 + stop, -- 5 + lookups, -- 6 (6/7 also signal of what to do) + replacements, -- 7 + subtype, -- 8 + } + for unic in next, sequence[start] do + local cu = coverage[unic] + if not cu then + coverage[unic] = rulehash -- can now be done cleaner i think + end + end + end + end + end + end + end + end + end + end + expandlookups(sequences) + expandlookups(sublookups) +end |