diff options
Diffstat (limited to 'src/fontloader/runtime/fontloader-reference.lua')
| -rw-r--r-- | src/fontloader/runtime/fontloader-reference.lua | 773 |
1 files changed, 772 insertions, 1 deletions
diff --git a/src/fontloader/runtime/fontloader-reference.lua b/src/fontloader/runtime/fontloader-reference.lua index 4cefe9a..6ef9430 100644 --- a/src/fontloader/runtime/fontloader-reference.lua +++ b/src/fontloader/runtime/fontloader-reference.lua @@ -1,6 +1,6 @@ -- merged file : c:/data/develop/context/sources/luatex-fonts-merged.lua -- parent file : c:/data/develop/context/sources/luatex-fonts.lua --- merge date : 07/30/16 00:26:47 +-- merge date : 08/11/16 13:56:03 do -- begin closure to overcome local limits and interference @@ -23430,6 +23430,777 @@ end -- closure do -- begin closure to overcome local limits and interference +if not modules then modules={} end modules ['font-otc']={ + version=1.001, + comment="companion to font-otf.lua (context)", + author="Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright="PRAGMA ADE / ConTeXt Development Team", + license="see context related readme files" +} +local format,insert,sortedkeys,tohash=string.format,table.insert,table.sortedkeys,table.tohash +local type,next=type,next +local lpegmatch=lpeg.match +local utfbyte,utflen=utf.byte,utf.len +local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end) +local report_otf=logs.reporter("fonts","otf loading") +local fonts=fonts +local otf=fonts.handlers.otf +local registerotffeature=otf.features.register +local setmetatableindex=table.setmetatableindex +local normalized={ + substitution="substitution", + single="substitution", + ligature="ligature", + alternate="alternate", + multiple="multiple", + kern="kern", + pair="pair", + chainsubstitution="chainsubstitution", + chainposition="chainposition", +} +local types={ + substitution="gsub_single", + ligature="gsub_ligature", + alternate="gsub_alternate", + multiple="gsub_multiple", + kern="gpos_pair", + pair="gpos_pair", + chainsubstitution="gsub_contextchain", + chainposition="gpos_contextchain", +} +local names={ + gsub_single="gsub", + gsub_multiple="gsub", + gsub_alternate="gsub", + gsub_ligature="gsub", + gsub_context="gsub", + gsub_contextchain="gsub", + gsub_reversecontextchain="gsub", + gpos_single="gpos", + gpos_pair="gpos", + gpos_cursive="gpos", + gpos_mark2base="gpos", + gpos_mark2ligature="gpos", + gpos_mark2mark="gpos", + gpos_context="gpos", + gpos_contextchain="gpos", +} +setmetatableindex(types,function(t,k) t[k]=k return k end) +local everywhere={ ["*"]={ ["*"]=true } } +local noflags={ false,false,false,false } +local function getrange(sequences,category) + local count=#sequences + local first=nil + local last=nil + for i=1,count do + local t=sequences[i].type + if t and names[t]==category then + if not first then + first=i + end + last=i + end + end + return first or 1,last or count +end +local function validspecification(specification,name) + local dataset=specification.dataset + if dataset then + elseif specification[1] then + dataset=specification + specification={ dataset=dataset } + else + dataset={ { data=specification.data } } + specification.data=nil + specification.dataset=dataset + end + local first=dataset[1] + if first then + first=first.data + end + if not first then + report_otf("invalid feature specification, no dataset") + return + end + if type(name)~="string" then + name=specification.name or first.name + end + if type(name)~="string" then + report_otf("invalid feature specification, no name") + return + end + local n=#dataset + if n>0 then + for i=1,n do + setmetatableindex(dataset[i],specification) + end + return specification,name + end +end +local function addfeature(data,feature,specifications) + if not specifications then + report_otf("missing specification") + return + end + local descriptions=data.descriptions + local resources=data.resources + local features=resources.features + local sequences=resources.sequences + if not features or not sequences then + report_otf("missing specification") + return + end + local alreadydone=resources.alreadydone + if not alreadydone then + alreadydone={} + resources.alreadydone=alreadydone + end + if alreadydone[specifications] then + return + else + alreadydone[specifications]=true + end + local fontfeatures=resources.features or everywhere + local unicodes=resources.unicodes + local splitter=lpeg.splitter(" ",unicodes) + local done=0 + local skip=0 + local aglunicodes=false + local specifications=validspecification(specifications,feature) + if not specifications then + return + end + local function tounicode(code) + if not code then + return + end + if type(code)=="number" then + return code + end + local u=unicodes[code] + if u then + return u + end + if utflen(code)==1 then + u=utfbyte(code) + if u then + return u + end + end + if not aglunicodes then + aglunicodes=fonts.encodings.agl.unicodes + end + return aglunicodes[code] + end + local coverup=otf.coverup + local coveractions=coverup.actions + local stepkey=coverup.stepkey + local register=coverup.register + local function prepare_substitution(list,featuretype) + local coverage={} + local cover=coveractions[featuretype] + for code,replacement in next,list do + local unicode=tounicode(code) + local description=descriptions[unicode] + if description then + if type(replacement)=="table" then + replacement=replacement[1] + end + replacement=tounicode(replacement) + if replacement and descriptions[replacement] then + cover(coverage,unicode,replacement) + done=done+1 + else + skip=skip+1 + end + else + skip=skip+1 + end + end + return coverage + end + local function prepare_alternate(list,featuretype) + local coverage={} + local cover=coveractions[featuretype] + for code,replacement in next,list do + local unicode=tounicode(code) + local description=descriptions[unicode] + if not description then + skip=skip+1 + elseif type(replacement)=="table" then + local r={} + for i=1,#replacement do + local u=tounicode(replacement[i]) + r[i]=descriptions[u] and u or unicode + end + cover(coverage,unicode,r) + done=done+1 + else + local u=tounicode(replacement) + if u then + cover(coverage,unicode,{ u }) + done=done+1 + else + skip=skip+1 + end + end + end + return coverage + end + local function prepare_multiple(list,featuretype) + local coverage={} + local cover=coveractions[featuretype] + for code,replacement in next,list do + local unicode=tounicode(code) + local description=descriptions[unicode] + if not description then + skip=skip+1 + elseif type(replacement)=="table" then + local r,n={},0 + for i=1,#replacement do + local u=tounicode(replacement[i]) + if descriptions[u] then + n=n+1 + r[n]=u + end + end + if n>0 then + cover(coverage,unicode,r) + done=done+1 + else + skip=skip+1 + end + else + local u=tounicode(replacement) + if u then + cover(coverage,unicode,{ u }) + done=done+1 + else + skip=skip+1 + end + end + end + return coverage + end + local function prepare_ligature(list,featuretype) + local coverage={} + local cover=coveractions[featuretype] + for code,ligature in next,list do + local unicode=tounicode(code) + local description=descriptions[unicode] + if description then + if type(ligature)=="string" then + ligature={ lpegmatch(splitter,ligature) } + end + local present=true + for i=1,#ligature do + local l=ligature[i] + local u=tounicode(l) + if descriptions[u] then + ligature[i]=u + else + present=false + break + end + end + if present then + cover(coverage,unicode,ligature) + done=done+1 + else + skip=skip+1 + end + else + skip=skip+1 + end + end + return coverage + end + local function prepare_kern(list,featuretype) + local coverage={} + local cover=coveractions[featuretype] + for code,replacement in next,list do + local unicode=tounicode(code) + local description=descriptions[unicode] + if description and type(replacement)=="table" then + local r={} + for k,v in next,replacement do + local u=tounicode(k) + if u then + r[u]=v + end + end + if next(r) then + cover(coverage,unicode,r) + done=done+1 + else + skip=skip+1 + end + else + skip=skip+1 + end + end + return coverage + end + local function prepare_pair(list,featuretype) + local coverage={} + local cover=coveractions[featuretype] + if cover then + for code,replacement in next,list do + local unicode=tounicode(code) + local description=descriptions[unicode] + if description and type(replacement)=="table" then + local r={} + for k,v in next,replacement do + local u=tounicode(k) + if u then + r[u]=v + end + end + if next(r) then + cover(coverage,unicode,r) + done=done+1 + else + skip=skip+1 + end + else + skip=skip+1 + end + end + else + report_otf("unknown cover type %a",featuretype) + end + return coverage + end + local function prepare_chain(list,featuretype,sublookups) + local rules=list.rules + local coverage={} + if rules then + local rulehash={} + local rulesize=0 + local sequence={} + local nofsequences=0 + local lookuptype=types[featuretype] + 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 and sublookups 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 + end + end + end + if nofsequences>0 then + local hashed={} + for i=1,nofsequences do + local t={} + local s=sequence[i] + for i=1,#s do + local u=tounicode(s[i]) + if u then + t[u]=true + end + end + hashed[i]=t + end + sequence=hashed + rulesize=rulesize+1 + rulehash[rulesize]={ + nofrules, + lookuptype, + sequence, + start, + stop, + lookups, + replacements, + subtype, + } + for unic in next,sequence[start] do + local cu=coverage[unic] + if not cu then + coverage[unic]=rulehash + end + end + end + end + end + return coverage + end + local dataset=specifications.dataset + local function report(name,category,position,first,last,sequences) + report_otf("injecting name %a of category %a at position %i in [%i,%i] of [%i,%i]", + name,category,position,first,last,1,#sequences) + end + local function inject(specification,sequences,sequence,first,last,category,name) + local position=specification.position or false + if not position then + position=specification.prepend + if position==true then + if trace_loading then + report(name,category,first,first,last,sequences) + end + insert(sequences,first,sequence) + return + end + end + if not position then + position=specification.append + if position==true then + if trace_loading then + report(name,category,last+1,first,last,sequences) + end + insert(sequences,last+1,sequence) + return + end + end + local kind=type(position) + if kind=="string" then + local index=false + for i=first,last do + local s=sequences[i] + local f=s.features + if f then + for k in next,f do + if k==position then + index=i + break + end + end + if index then + break + end + end + end + if index then + position=index + else + position=last+1 + end + elseif kind=="number" then + if position<0 then + position=last-position+1 + end + if position>last then + position=last+1 + elseif position<first then + position=first + end + else + position=last+1 + end + if trace_loading then + report(name,category,position,first,last,sequences) + end + insert(sequences,position,sequence) + end + for s=1,#dataset do + local specification=dataset[s] + local valid=specification.valid + local feature=specification.name or feature + if not feature or feature=="" then + report_otf("no valid name given for extra feature") + elseif not valid or valid(data,specification,feature) then + local initialize=specification.initialize + if initialize then + specification.initialize=initialize(specification,data) and initialize or nil + end + local askedfeatures=specification.features or everywhere + local askedsteps=specification.steps or specification.subtables or { specification.data } or {} + local featuretype=normalized[specification.type or "substitution"] or "substitution" + local featureflags=specification.flags or noflags + local featureorder=specification.order or { feature } + local featurechain=(featuretype=="chainsubstitution" or featuretype=="chainposition") and 1 or 0 + local nofsteps=0 + local steps={} + local sublookups=specification.lookups + local category=nil + if sublookups then + local s={} + for i=1,#sublookups do + local specification=sublookups[i] + local askedsteps=specification.steps or specification.subtables or { specification.data } or {} + local featuretype=normalized[specification.type or "substitution"] or "substitution" + local featureflags=specification.flags or noflags + local nofsteps=0 + local steps={} + for i=1,#askedsteps do + local list=askedsteps[i] + local coverage=nil + local format=nil + if featuretype=="substitution" then + coverage=prepare_substitution(list,featuretype) + elseif featuretype=="ligature" then + coverage=prepare_ligature(list,featuretype) + elseif featuretype=="alternate" then + coverage=prepare_alternate(list,featuretype) + elseif featuretype=="multiple" then + coverage=prepare_multiple(list,featuretype) + elseif featuretype=="kern" then + format="kern" + coverage=prepare_kern(list,featuretype) + elseif featuretype=="pair" then + format="pair" + coverage=prepare_pair(list,featuretype) + end + if coverage and next(coverage) then + nofsteps=nofsteps+1 + steps[nofsteps]=register(coverage,featuretype,format,feature,nofsteps,descriptions,resources) + end + end + s[i]={ + [stepkey]=steps, + nofsteps=nofsteps, + type=types[featuretype], + } + end + sublookups=s + end + for i=1,#askedsteps do + local list=askedsteps[i] + local coverage=nil + local format=nil + if featuretype=="substitution" then + category="gsub" + coverage=prepare_substitution(list,featuretype) + elseif featuretype=="ligature" then + category="gsub" + coverage=prepare_ligature(list,featuretype) + elseif featuretype=="alternate" then + category="gsub" + coverage=prepare_alternate(list,featuretype) + elseif featuretype=="multiple" then + category="gsub" + coverage=prepare_multiple(list,featuretype) + elseif featuretype=="kern" then + category="gpos" + format="kern" + coverage=prepare_kern(list,featuretype) + elseif featuretype=="pair" then + category="gpos" + format="pair" + coverage=prepare_pair(list,featuretype) + elseif featuretype=="chainsubstitution" then + category="gsub" + coverage=prepare_chain(list,featuretype,sublookups) + elseif featuretype=="chainposition" then + category="gpos" + coverage=prepare_chain(list,featuretype,sublookups) + else + report_otf("not registering feature %a, unknown category",feature) + return + end + if coverage and next(coverage) then + nofsteps=nofsteps+1 + steps[nofsteps]=register(coverage,featuretype,format,feature,nofsteps,descriptions,resources) + end + end + if nofsteps>0 then + for k,v in next,askedfeatures do + if v[1] then + askedfeatures[k]=tohash(v) + end + end + if featureflags[1] then featureflags[1]="mark" end + if featureflags[2] then featureflags[2]="ligature" end + if featureflags[3] then featureflags[3]="base" end + local steptype=types[featuretype] + local sequence={ + chain=featurechain, + features={ [feature]=askedfeatures }, + flags=featureflags, + name=feature, + order=featureorder, + [stepkey]=steps, + nofsteps=nofsteps, + type=steptype, + } + local first,last=getrange(sequences,category) + inject(specification,sequences,sequence,first,last,category,feature) + local features=fontfeatures[category] + if not features then + features={} + fontfeatures[category]=features + end + local k=features[feature] + if not k then + k={} + features[feature]=k + end + for script,languages in next,askedfeatures do + local kk=k[script] + if not kk then + kk={} + k[script]=kk + end + for language,value in next,languages do + kk[language]=value + end + end + end + end + end + if trace_loading then + report_otf("registering feature %a, affected glyphs %a, skipped glyphs %a",feature,done,skip) + end +end +otf.enhancers.addfeature=addfeature +local extrafeatures={} +local knownfeatures={} +function otf.addfeature(name,specification) + if type(name)=="table" then + specification=name + end + if type(specification)~="table" then + report_otf("invalid feature specification, no valid table") + return + end + specification,name=validspecification(specification,name) + if name and specification then + local slot=knownfeatures[name] + if slot then + else + slot=#extrafeatures+1 + knownfeatures[name]=slot + end + specification.name=name + extrafeatures[slot]=specification + end +end +local function enhance(data,filename,raw) + for slot=1,#extrafeatures do + local specification=extrafeatures[slot] + addfeature(data,specification.name,specification) + end +end +otf.enhancers.enhance=enhance +otf.enhancers.register("check extra features",enhance) +local tlig={ + [0x2013]={ 0x002D,0x002D }, + [0x2014]={ 0x002D,0x002D,0x002D }, +} +local tlig_specification={ + type="ligature", + features=everywhere, + data=tlig, + order={ "tlig" }, + flags=noflags, + prepend=true, +} +otf.addfeature("tlig",tlig_specification) +registerotffeature { + name='tlig', + description='tex ligatures', +} +local trep={ + [0x0027]=0x2019, +} +local trep_specification={ + type="substitution", + features=everywhere, + data=trep, + order={ "trep" }, + flags=noflags, + prepend=true, +} +otf.addfeature("trep",trep_specification) +registerotffeature { + name='trep', + description='tex replacements', +} +local anum_arabic={ + [0x0030]=0x0660, + [0x0031]=0x0661, + [0x0032]=0x0662, + [0x0033]=0x0663, + [0x0034]=0x0664, + [0x0035]=0x0665, + [0x0036]=0x0666, + [0x0037]=0x0667, + [0x0038]=0x0668, + [0x0039]=0x0669, +} +local anum_persian={ + [0x0030]=0x06F0, + [0x0031]=0x06F1, + [0x0032]=0x06F2, + [0x0033]=0x06F3, + [0x0034]=0x06F4, + [0x0035]=0x06F5, + [0x0036]=0x06F6, + [0x0037]=0x06F7, + [0x0038]=0x06F8, + [0x0039]=0x06F9, +} +local function valid(data) + local features=data.resources.features + if features then + for k,v in next,features do + for k,v in next,v do + if v.arab then + return true + end + end + end + end +end +local anum_specification={ + { + type="substitution", + features={ arab={ urd=true,dflt=true } }, + order={ "anum" }, + data=anum_arabic, + flags=noflags, + valid=valid, + }, + { + type="substitution", + features={ arab={ urd=true } }, + order={ "anum" }, + data=anum_persian, + flags=noflags, + valid=valid, + }, +} +otf.addfeature("anum",anum_specification) +registerotffeature { + name='anum', + description='arabic digits', +} + +end -- closure + +do -- begin closure to overcome local limits and interference + if not modules then modules={} end modules ['font-onr']={ version=1.001, comment="companion to font-ini.mkiv", |