diff options
Diffstat (limited to 'tex/context/base/font-ots.lua')
| -rw-r--r-- | tex/context/base/font-ots.lua | 374 |
1 files changed, 140 insertions, 234 deletions
diff --git a/tex/context/base/font-ots.lua b/tex/context/base/font-ots.lua index 27e0f161e..2204d1496 100644 --- a/tex/context/base/font-ots.lua +++ b/tex/context/base/font-ots.lua @@ -126,6 +126,7 @@ local trace_compruns = false registertracker("otf.compruns", function(v local quit_on_no_replacement = true -- maybe per font local zwnjruns = true +local optimizekerns = true registerdirective("otf.zwnjruns", function(v) zwnjruns = v end) registerdirective("otf.chain.quitonnoreplacement",function(value) quit_on_no_replacement = value end) @@ -196,11 +197,7 @@ local math_code = nodecodes.math local dir_code = whatcodes.dir local localpar_code = whatcodes.localpar - local discretionary_code = disccodes.discretionary -local regular_code = disccodes.regular ------ automatic_code = disccodes.automatic - local ligature_code = glyphcodes.ligature local privateattribute = attributes.private @@ -563,69 +560,7 @@ local function getcomponentindex(start) -- we could store this offset in the gly end end -local a_noligature = attributes.private("noligature") -local prehyphenchar = languages and languages.prehyphenchar -local posthyphenchar = languages and languages.posthyphenchar ------ preexhyphenchar = languages and languages.preexhyphenchar ------ postexhyphenchar = languages and languages.postexhyphenchar - -if prehyphenchar then - - -- okay - -elseif context then - - report_warning("no language support") os.exit() - -else - - local newlang = lang.new - local getpre = lang.prehyphenchar - local getpost = lang.posthyphenchar - -- local getpreex = lang.preexhyphenchar - -- local getpostex = lang.postexhyphenchar - - prehyphenchar = function(l) local l = newlang(l) return l and getpre (l) or -1 end - posthyphenchar = function(l) local l = newlang(l) return l and getpost (l) or -1 end - -- preexhyphenchar = function(l) local l = newlang(l) return l and getpreex (l) or -1 end - -- postexhyphenchar = function(l) local l = newlang(l) return l and getpostex(l) or -1 end - -end - -local function addhyphens(template,pre,post) - -- inserted by hyphenation algorithm - local l = getfield(template,"lang") - local p = prehyphenchar(l) - if p and p > 0 then - local c = copy_node(template) - setfield(c,"char",p) - if pre then - local t = find_node_tail(pre) - setfield(t,"next",c) - setfield(c,"prev",t) - else - pre = c - end - end - local p = posthyphenchar(l) - if p and p > 0 then - local c = copy_node(template) - setfield(c,"char",p) - if post then - -- post has a prev nesting node .. alternatively we could - local prev = getprev(post) - setfield(c,"next",post) - setfield(post,"prev",c) - if prev then - setfield(prev,"next",c) - setfield(c,"prev",prev) - end - else - post = c - end - end - return pre, post -end +local a_noligature = attributes.private("noligature") local function toligature(head,start,stop,char,dataset,sequence,markflag,discfound) -- brr head if getattr(start,a_noligature) == 1 then @@ -640,8 +575,8 @@ local function toligature(head,start,stop,char,dataset,sequence,markflag,discfou -- needs testing (side effects): local components = getfield(start,"components") if components then --- we get a double free .. needs checking --- flush_node_list(components) + -- we get a double free .. needs checking + -- flush_node_list(components) end -- local prev = getprev(start) @@ -663,8 +598,8 @@ local function toligature(head,start,stop,char,dataset,sequence,markflag,discfou if next then setfield(next,"prev",base) end - setfield(base,"next",next) setfield(base,"prev",prev) + setfield(base,"next",next) if not discfound then local deletemarks = markflag ~= "mark" local components = start @@ -711,53 +646,34 @@ local function toligature(head,start,stop,char,dataset,sequence,markflag,discfou local discprev = getfield(discfound,"prev") local discnext = getfield(discfound,"next") if discprev and discnext then - local subtype = getsubtype(discfound) - if subtype == discretionary_code then - local pre = getfield(discfound,"pre") - local post = getfield(discfound,"post") - local replace = getfield(discfound,"replace") - if not replace then -- todo: signal simple hyphen - local prev = getfield(base,"prev") - local copied = copy_node_list(comp) - setfield(discnext,"prev",nil) -- also blocks funny assignments - setfield(discprev,"next",nil) -- also blocks funny assignments - if pre then - setfield(discprev,"next",pre) - setfield(pre,"prev",discprev) - end - pre = comp - if post then - local tail = find_node_tail(post) - setfield(tail,"next",discnext) - setfield(discnext,"prev",tail) - setfield(post,"prev",nil) - else - post = discnext - end - setfield(prev,"next",discfound) - setfield(next,"prev",discfound) - setfield(discfound,"next",next) - setfield(discfound,"prev",prev) - setfield(base,"next",nil) - setfield(base,"prev",nil) - setfield(base,"components",copied) - setfield(discfound,"pre",pre) - setfield(discfound,"post",post) - setfield(discfound,"replace",base) - setfield(discfound,"subtype",discretionary_code) - base = prev -- restart - end - elseif subtype == regular_code then - -- local prev = getfield(base,"prev") - -- local next = getfield(base,"next") + -- we assume normalization in context, and don't care about generic ... especially + -- \- can give problems as there we can have a negative char but that won't match + -- anyway + local pre = getfield(discfound,"pre") + local post = getfield(discfound,"post") + local replace = getfield(discfound,"replace") + if not replace then -- todo: signal simple hyphen + local prev = getfield(base,"prev") local copied = copy_node_list(comp) setfield(discnext,"prev",nil) -- also blocks funny assignments setfield(discprev,"next",nil) -- also blocks funny assignments - local pre, post = addhyphens(comp,comp,discnext,subtype) -- takes from components + if pre then + setfield(discprev,"next",pre) + setfield(pre,"prev",discprev) + end + pre = comp + if post then + local tail = find_node_tail(post) + setfield(tail,"next",discnext) + setfield(discnext,"prev",tail) + setfield(post,"prev",nil) + else + post = discnext + end setfield(prev,"next",discfound) - setfield(next,"prev",discfound) - setfield(discfound,"next",next) setfield(discfound,"prev",prev) + setfield(discfound,"next",next) + setfield(next,"prev",discfound) setfield(base,"next",nil) setfield(base,"prev",nil) setfield(base,"components",copied) @@ -765,9 +681,7 @@ local function toligature(head,start,stop,char,dataset,sequence,markflag,discfou setfield(discfound,"post",post) setfield(discfound,"replace",base) setfield(discfound,"subtype",discretionary_code) - base = next -- or restart - else - -- forget about it in generic usage + base = prev -- restart end end end @@ -790,8 +704,8 @@ local function multiple_glyphs(head,start,multiple,ignoremarks) local n = copy_node(start) -- ignore components resetinjection(n) setfield(n,"char",multiple[k]) - setfield(n,"next",sn) setfield(n,"prev",start) + setfield(n,"next",sn) if sn then setfield(sn,"prev",n) end @@ -980,13 +894,13 @@ function handlers.gpos_single(head,start,dataset,sequence,kerns,rlmode,step,i,in if step.format == "pair" then local dx, dy, w, h = setpair(start,factor,rlmode,sequence.flags[4],kerns,injection) if trace_kerns then - logprocess("%s: shifting single %s by (%p,%p) and correction (%p,%p)",pref(dataset,sequence),gref(startchar),dx,dy,w,h) + logprocess("%s: shifting single %s by (%p,%p) and correction (%p,%p) as %s",pref(dataset,sequence),gref(startchar),dx,dy,w,h,injection or "injections") end else -- needs checking .. maybe no kerns format for single local k = setkern(start,factor,rlmode,kerns,injection) if trace_kerns then - logprocess("%s: shifting single %s by %p",pref(dataset,sequence),gref(startchar),k) + logprocess("%s: shifting single %s by %p as %s",pref(dataset,sequence),gref(startchar),k,injection or "injections") end end return head, start, false @@ -1009,18 +923,30 @@ function handlers.gpos_pair(head,start,dataset,sequence,kerns,rlmode,step,i,inje break elseif step.format == "pair" then local a, b = krn[1], krn[2] + if optimizekerns then + -- this permits a mixed table, but we could also decide to optimize this + -- in the loader and use format 'kern' + if not b and a[1] == 0 and a[2] == 0 and a[4] == 0 then + local k = setkern(snext,factor,rlmode,a[3],injection) + if trace_kerns then + logprocess("%s: shifting single %s by %p",pref(dataset,sequence),gref(nextchar),k) + end + done = true + break + end + end if a and #a > 0 then - local x, y, w, h = setpair(start,factor,rlmode,sequence.flags[4],a,injection) -- characters[startchar]) + local x, y, w, h = setpair(start,factor,rlmode,sequence.flags[4],a,injection) if trace_kerns then local startchar = getchar(start) - logprocess("%s: shifting first of pair %s and %s by (%p,%p) and correction (%p,%p)",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h) + logprocess("%s: shifting first of pair %s and %s by (%p,%p) and correction (%p,%p) as %s",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h,injection or "injections") end end if b and #b > 0 then - local x, y, w, h = setpair(snext,factor,rlmode,sequence.flags[4],b,injection) -- characters[nextchar]) + local x, y, w, h = setpair(snext,factor,rlmode,sequence.flags[4],b,injection) if trace_kerns then local startchar = getchar(snext) - logprocess("%s: shifting second of pair %s and %s by (%p,%p) and correction (%p,%p)",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h) + logprocess("%s: shifting second of pair %s and %s by (%p,%p) and correction (%p,%p) as %s",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h,injection or "injections") end end done = true @@ -1028,7 +954,7 @@ function handlers.gpos_pair(head,start,dataset,sequence,kerns,rlmode,step,i,inje elseif krn ~= 0 then local k = setkern(snext,factor,rlmode,krn,injection) if trace_kerns then - logprocess("%s: inserting kern %p between %s and %s",pref(dataset,sequence),k,gref(getchar(prev)),gref(nextchar)) + logprocess("%s: inserting kern %p between %s and %s as %s",pref(dataset,sequence),k,gref(getchar(prev)),gref(nextchar),injection or "injections") end done = true break @@ -1566,16 +1492,28 @@ function chainprocs.gpos_pair(head,start,stop,dataset,sequence,currentlookup,rlm break elseif step.format == "pair" then local a, b = krn[1], krn[2] + if optimizekerns then + -- this permits a mixed table, but we could also decide to optimize this + -- in the loader and use format 'kern' + if not b and a[1] == 0 and a[2] == 0 and a[4] == 0 then + local k = setkern(snext,factor,rlmode,a[3],"injections") + if trace_kerns then + logprocess("%s: shifting single %s by %p",cref(dataset,sequence),gref(startchar),k) + end + done = true + break + end + end if a and #a > 0 then local startchar = getchar(start) - local x, y, w, h = setpair(start,factor,rlmode,sequence.flags[4],a) -- currentlookups flags? + local x, y, w, h = setpair(start,factor,rlmode,sequence.flags[4],a,"injections") -- currentlookups flags? if trace_kerns then logprocess("%s: shifting first of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h) end end if b and #b > 0 then local startchar = getchar(start) - local x, y, w, h = setpair(snext,factor,rlmode,sequence.flags[4],b) + local x, y, w, h = setpair(snext,factor,rlmode,sequence.flags[4],b,"injections") if trace_kerns then logprocess("%s: shifting second of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h) end @@ -1848,7 +1786,7 @@ end local function chaindisk(head,start,last,dataset,sequence,chainlookup,rlmode,k,ck,chainproc) if not start then - return -- safeguard + return head, start, false end local startishead = start == head @@ -2058,8 +1996,8 @@ local function chaindisk(head,start,last,dataset,sequence,chainlookup,rlmode,k,c setfield(tail,"next",replace) setfield(replace,"prev",tail) end - setfield(lookaheaddisc,"pre",cf) -- also updates pre-tail - setfield(lookaheaddisc,"replace",new) -- also updates replace-tail + setfield(lookaheaddisc,"pre",cf) -- also updates tail + setfield(lookaheaddisc,"replace",new) -- also updates tail start = getprev(lookaheaddisc) sweephead[cf] = getnext(clast) @@ -2114,8 +2052,8 @@ local function chaindisk(head,start,last,dataset,sequence,chainlookup,rlmode,k,c else replace = new end - setfield(backtrackdisc,"post",post) -- also updates post-tail - setfield(backtrackdisc,"replace",replace) -- also updates replace-tail + setfield(backtrackdisc,"post",post) -- also updates tail + setfield(backtrackdisc,"replace",replace) -- also updates tail start = getprev(backtrackdisc) sweephead[post] = getnext(clast) sweephead[replace] = getnext(last) @@ -2270,7 +2208,8 @@ local function handle_contextchain(head,start,dataset,sequence,contexts,rlmode) notmatchpre[last] = nil notmatchpost[last] = true notmatchreplace[last] = nil - local pre = getfield(last,"pre") + local pre = getfield(last,"pre") + local replace = getfield(last,"replace") if pre then local n = n while pre do @@ -2290,7 +2229,6 @@ local function handle_contextchain(head,start,dataset,sequence,contexts,rlmode) else notmatchpre[last] = true end - local replace = getfield(last,"replace") if replace then -- so far we never entered this branch while replace do @@ -2315,10 +2253,12 @@ local function handle_contextchain(head,start,dataset,sequence,contexts,rlmode) break end else - last = getnext(last) -- no skipping here + notmatchreplace[last] = true end + last = getnext(last) else - last = getnext(last) -- no skipping here + match = false + break end else match = false @@ -2808,78 +2748,61 @@ local function kernrun(disc,run) prevmarks = getprev(prevmarks) end -- - if prev and (pre or replace) then - if not (getid(prev) == glyph_code and getfont(prev) == currentfont and getsubtype(prev)<256) then - prev = false - end + if prev and (pre or replace) and not (getid(prev) == glyph_code and getfont(prev) == currentfont and getsubtype(prev)<256) then + prev = false end - if next and (post or replace) then - if not (getid(next) == glyph_code and getfont(next) == currentfont and getsubtype(next)<256) then - next = false - end + if next and (post or replace) and not (getid(next) == glyph_code and getfont(next) == currentfont and getsubtype(next)<256) then + next = false end -- - if not pre then - -- go on - elseif prev then - local nest = getprev(pre) - setfield(pre,"prev",prev) - setfield(prev,"next",pre) - run(prevmarks,"preinjections") - setfield(pre,"prev",nest) - setfield(prev,"next",disc) - else - run(pre,"preinjections") + if pre then + run(pre,"injections") + if prev then + local nest = getprev(pre) + setfield(pre,"prev",prev) + setfield(prev,"next",pre) + run(prevmarks,"preinjections",getnext(pre)) + setfield(pre,"prev",nest) + setfield(prev,"next",disc) + end end -- - if not post then - -- go on - elseif next then - local tail = find_node_tail(post) - setfield(tail,"next",next) - setfield(next,"prev",tail) - run(post,"postinjections",next) - setfield(tail,"next",nil) - setfield(next,"prev",disc) - else - run(post,"postinjections") + if post then + run(post,"injections") + if next then + local tail = find_node_tail(post) + setfield(tail,"next",next) + setfield(next,"prev",tail) + run(tail,"postinjections",next) + setfield(tail,"next",nil) + setfield(next,"prev",disc) + end end -- - if not replace and prev and next then - -- this should be already done by discfound + if replace then + run(replace,"injections") + if prev then + local nest = getprev(replace) + setfield(replace,"prev",prev) + setfield(prev,"next",replace) + run(prevmarks,"replaceinjections",getnext(replace)) + setfield(replace,"prev",nest) + setfield(prev,"next",disc) + end + if next then + local tail = find_node_tail(replace) + setfield(tail,"next",next) + setfield(next,"prev",tail) + run(tail,"replaceinjections",next) + setfield(tail,"next",nil) + setfield(next,"prev",disc) + end + elseif prev and next then setfield(prev,"next",next) setfield(next,"prev",prev) - run(prevmarks,"injections",next) - setfield(prev,"next",disc) - setfield(next,"prev",disc) - elseif prev and next then - local tail = find_node_tail(replace) - local nest = getprev(replace) - setfield(replace,"prev",prev) - setfield(prev,"next",replace) - setfield(tail,"next",next) - setfield(next,"prev",tail) - run(prevmarks,"replaceinjections",next) - setfield(replace,"prev",nest) - setfield(prev,"next",disc) - setfield(tail,"next",nil) - setfield(next,"prev",disc) - elseif prev then - local nest = getprev(replace) - setfield(replace,"prev",prev) - setfield(prev,"next",replace) - run(prevmarks,"replaceinjections") - setfield(replace,"prev",nest) + run(prevmarks,"emptyinjections",next) setfield(prev,"next",disc) - elseif next then - local tail = find_node_tail(replace) - setfield(tail,"next",next) - setfield(next,"prev",tail) - run(replace,"replaceinjections",next) - setfield(tail,"next",nil) setfield(next,"prev",disc) - else - run(replace,"replaceinjections") end end @@ -2903,7 +2826,7 @@ local function comprun(disc,run) local pre = getfield(disc,"pre") if pre then sweepnode = disc - sweeptype = "pre" -- in alternative code preinjections is used (also used then for proeprties, saves a variable) + sweeptype = "pre" local new, done = run(pre) if done then setfield(disc,"pre",new) @@ -3144,7 +3067,7 @@ local function featuresprocessor(head,font,attr) local start = head -- local ? rlmode = 0 -- to be checked ? if nofsteps == 1 then -- happens often - local step = steps[1] + local step = steps[1] local lookupcache = step.coverage if not lookupcache then -- also check for empty cache report_missing_cache(dataset,sequence) @@ -3247,14 +3170,14 @@ if not a or (a == attr) then -- sequence kan weg local h, d, ok = handler(head,start,dataset,sequence,lookupmatch,rlmode,step,1) if ok then - done = true + done = true success = true end end end end - local function k_run(sub,injection,last) + local function k_run(sub,injection,last,bound) local a = getattr(sub,0) -- if a then -- a = (a == attr) and (not attribute or getprop(sub,a_state) == attribute) @@ -3272,9 +3195,9 @@ if not a or (a == attr) then if id == glyph_code then local lookupmatch = lookupcache[getchar(n)] if lookupmatch then - local h, d, ok = handler(sub,n,dataset,sequence,lookupmatch,rlmode,step,1,injection) + local h, d, ok = handler(sub,n,dataset,sequence,lookupmatch,rlmode,step,1,injection,bound) if ok then - done = true + done = true success = true end end @@ -3318,24 +3241,15 @@ if not a or (a == attr) then start = getnext(start) end elseif id == disc_code then - local discretionary = getsubtype(start) == discretionary_code - if gpossing then - if discretionary then - kernrun(start,k_run) - else - discrun(start,d_run,k_run) - end - start = getnext(start) - elseif discretionary then - if typ == "gsub_ligature" then - start = testrun(start,t_run,c_run) - else - comprun(start,c_run) - start = getnext(start) - end - else + if gpossing then + kernrun(start,k_run) + start = getnext(start) + elseif typ == "gsub_ligature" then + start = testrun(start,t_run,c_run) + else + comprun(start,c_run) start = getnext(start) - end + end elseif id == whatsit_code then -- will be function local subtype = getsubtype(start) if subtype == dir_code then @@ -3472,7 +3386,7 @@ if not a or (a == attr) then end end - local function k_run(sub,injection,last) + local function k_run(sub,injection,last,bound) local a = getattr(sub,0) -- if a then -- a = (a == attr) and (not attribute or getprop(sub,a_state) == attribute) @@ -3494,7 +3408,7 @@ if not a or (a == attr) then if lookupcache then local lookupmatch = lookupcache[char] if lookupmatch then - local h, d, ok = handler(head,n,dataset,sequence,lookupmatch,step,rlmode,i,injection) + local h, d, ok = handler(head,n,dataset,sequence,lookupmatch,step,rlmode,i,injection,bound) if ok then done = true break @@ -3525,7 +3439,7 @@ if not a or (a == attr) then if not a or (a == attr) then local char = getchar(start) for i=1,nofsteps do - local step = steps[i] + local step = steps[i] local lookupcache = step.coverage if lookupcache then local lookupmatch = lookupcache[char] @@ -3603,27 +3517,19 @@ if not a or (a == attr) then start = getnext(start) end elseif id == disc_code then - local discretionary = getsubtype(start) == discretionary_code if gpossing then - if discretionary then - kernrun(start,k_run) - else - discrun(start,d_run,k_run) - end + kernrun(start,k_run) start = getnext(start) - elseif discretionary then - if typ == "gsub_ligature" then - start = testrun(start,t_run,c_run) - else - comprun(start,c_run) - start = getnext(start) - end + elseif typ == "gsub_ligature" then + start = testrun(start,t_run,c_run) else + comprun(start,c_run) start = getnext(start) end elseif id == whatsit_code then local subtype = getsubtype(start) if subtype == dir_code then + local dir = getfield(start,"dir") if dir == "+TLT" then topstack = topstack + 1 dirstack[topstack] = dir |