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Diffstat (limited to 'tex/context/base/node-inj.lua')
-rw-r--r-- | tex/context/base/node-inj.lua | 603 |
1 files changed, 0 insertions, 603 deletions
diff --git a/tex/context/base/node-inj.lua b/tex/context/base/node-inj.lua deleted file mode 100644 index 402403529..000000000 --- a/tex/context/base/node-inj.lua +++ /dev/null @@ -1,603 +0,0 @@ -if not modules then modules = { } end modules ['node-inj'] = { - version = 1.001, - comment = "companion to node-ini.mkiv", - author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", - copyright = "PRAGMA ADE / ConTeXt Development Team", - license = "see context related readme files", -} - --- This is very experimental (this will change when we have luatex > .50 and --- a few pending thingies are available. Also, Idris needs to make a few more --- test fonts. Some optimizations can go away when we have faster machines. - --- todo: ignore kerns between disc and glyph - -local next = next -local utfchar = utf.char - -local trace_injections = false trackers.register("nodes.injections", function(v) trace_injections = v end) - -local report_injections = logs.reporter("nodes","injections") - -local attributes, nodes, node = attributes, nodes, node - -fonts = fonts -local fontdata = fonts.hashes.identifiers - -nodes.injections = nodes.injections or { } -local injections = nodes.injections - -local nodecodes = nodes.nodecodes -local glyph_code = nodecodes.glyph -local kern_code = nodecodes.kern - -local nuts = nodes.nuts -local nodepool = nuts.pool - -local newkern = nodepool.kern - -local tonode = nuts.tonode -local tonut = nuts.tonut - -local getfield = nuts.getfield -local getnext = nuts.getnext -local getprev = nuts.getprev -local getid = nuts.getid -local getattr = nuts.getattr -local getfont = nuts.getfont -local getsubtype = nuts.getsubtype -local getchar = nuts.getchar - -local setfield = nuts.setfield -local setattr = nuts.setattr - -local traverse_id = nuts.traverse_id -local insert_node_before = nuts.insert_before -local insert_node_after = nuts.insert_after - -local a_kernpair = attributes.private('kernpair') -local a_ligacomp = attributes.private('ligacomp') -local a_markbase = attributes.private('markbase') -local a_markmark = attributes.private('markmark') -local a_markdone = attributes.private('markdone') -local a_cursbase = attributes.private('cursbase') -local a_curscurs = attributes.private('curscurs') -local a_cursdone = attributes.private('cursdone') - -local unsetvalue = attributes.unsetvalue - --- This injector has been tested by Idris Samawi Hamid (several arabic fonts as well as --- the rather demanding Husayni font), Khaled Hosny (latin and arabic) and Kaj Eigner --- (arabic, hebrew and thai) and myself (whatever font I come across). I'm pretty sure --- that this code is not 100% okay but examples are needed to figure things out. - -function injections.installnewkern(nk) - newkern = nk or newkern -end - -local cursives = { } -local marks = { } -local kerns = { } - --- Currently we do gpos/kern in a bit inofficial way but when we have the extra fields in --- glyphnodes to manipulate ht/dp/wd explicitly I will provide an alternative; also, we --- can share tables. - --- For the moment we pass the r2l key ... volt/arabtype tests .. idris: this needs --- checking with husayni (volt and fontforge). - -function injections.reset(n) --- if getattr(n,a_kernpair) then --- setattr(n,a_kernpair,unsetvalue) --- end --- if getattr(n,a_markdone) then --- setattr(n,a_markbase,unsetvalue) --- setattr(n,a_markmark,unsetvalue) --- setattr(n,a_markdone,unsetvalue) --- end --- if getattr(n,a_cursdone) then --- setattr(n,a_cursbase,unsetvalue) --- setattr(n,a_curscurs,unsetvalue) --- setattr(n,a_cursdone,unsetvalue) --- end --- if getattr(n,a_ligacomp) then --- setattr(n,a_ligacomp,unsetvalue) --- end -end - -function injections.setligaindex(n,index) - setattr(n,a_ligacomp,index) -end - -function injections.getligaindex(n,default) - return getattr(n,a_ligacomp) or default -end - -function injections.setcursive(start,nxt,factor,rlmode,exit,entry,tfmstart,tfmnext) - local dx, dy = factor*(exit[1]-entry[1]), factor*(exit[2]-entry[2]) - local ws, wn = tfmstart.width, tfmnext.width - local bound = #cursives + 1 - setattr(start,a_cursbase,bound) - setattr(nxt,a_curscurs,bound) - cursives[bound] = { rlmode, dx, dy, ws, wn } - return dx, dy, bound -end - -function injections.setpair(current,factor,rlmode,r2lflag,spec,tfmchr) - local x, y, w, h = factor*spec[1], factor*spec[2], factor*spec[3], factor*spec[4] - -- dy = y - h - if x ~= 0 or w ~= 0 or y ~= 0 or h ~= 0 then - local bound = getattr(current,a_kernpair) - if bound then - local kb = kerns[bound] - -- inefficient but singles have less, but weird anyway, needs checking - kb[2], kb[3], kb[4], kb[5] = (kb[2] or 0) + x, (kb[3] or 0) + y, (kb[4] or 0)+ w, (kb[5] or 0) + h - else - bound = #kerns + 1 - setattr(current,a_kernpair,bound) - kerns[bound] = { rlmode, x, y, w, h, r2lflag, tfmchr.width } - end - return x, y, w, h, bound - end - return x, y, w, h -- no bound -end - -function injections.setkern(current,factor,rlmode,x,tfmchr) - local dx = factor*x - if dx ~= 0 then - local bound = #kerns + 1 - setattr(current,a_kernpair,bound) - kerns[bound] = { rlmode, dx } - return dx, bound - else - return 0, 0 - end -end - -function injections.setmark(start,base,factor,rlmode,ba,ma) -- ba=baseanchor, ma=markanchor - local dx, dy = factor*(ba[1]-ma[1]), factor*(ba[2]-ma[2]) - local bound = getattr(base,a_markbase) - local index = 1 - if bound then - local mb = marks[bound] - if mb then - -- if not index then index = #mb + 1 end - index = #mb + 1 - mb[index] = { dx, dy, rlmode } - setattr(start,a_markmark,bound) - setattr(start,a_markdone,index) - return dx, dy, bound - else - report_injections("possible problem, %U is base mark without data (id %a)",getchar(base),bound) - end - end - index = index or 1 - bound = #marks + 1 - setattr(base,a_markbase,bound) - setattr(start,a_markmark,bound) - setattr(start,a_markdone,index) - marks[bound] = { [index] = { dx, dy, rlmode } } - return dx, dy, bound -end - -local function dir(n) - return (n and n<0 and "r-to-l") or (n and n>0 and "l-to-r") or "unset" -end - -local function trace(head) - report_injections("begin run") - for n in traverse_id(glyph_code,head) do - if getsubtype(n) < 256 then - local kp = getattr(n,a_kernpair) - local mb = getattr(n,a_markbase) - local mm = getattr(n,a_markmark) - local md = getattr(n,a_markdone) - local cb = getattr(n,a_cursbase) - local cc = getattr(n,a_curscurs) - local char = getchar(n) - report_injections("font %s, char %U, glyph %c",getfont(n),char,char) - if kp then - local k = kerns[kp] - if k[3] then - report_injections(" pairkern: dir %a, x %p, y %p, w %p, h %p",dir(k[1]),k[2],k[3],k[4],k[5]) - else - report_injections(" kern: dir %a, dx %p",dir(k[1]),k[2]) - end - end - if mb then - report_injections(" markbase: bound %a",mb) - end - if mm then - local m = marks[mm] - if mb then - local m = m[mb] - if m then - report_injections(" markmark: bound %a, index %a, dx %p, dy %p",mm,md,m[1],m[2]) - else - report_injections(" markmark: bound %a, missing index",mm) - end - else - m = m[1] - report_injections(" markmark: bound %a, dx %p, dy %p",mm,m and m[1],m and m[2]) - end - end - if cb then - report_injections(" cursbase: bound %a",cb) - end - if cc then - local c = cursives[cc] - report_injections(" curscurs: bound %a, dir %a, dx %p, dy %p",cc,dir(c[1]),c[2],c[3]) - end - end - end - report_injections("end run") -end - --- todo: reuse tables (i.e. no collection), but will be extra fields anyway --- todo: check for attribute - --- We can have a fast test on a font being processed, so we can check faster for marks etc --- but I'll make a context variant anyway. - -local function show_result(head) - local current = head - local skipping = false - while current do - local id = getid(current) - if id == glyph_code then - report_injections("char: %C, width %p, xoffset %p, yoffset %p", - getchar(current),getfield(current,"width"),getfield(current,"xoffset"),getfield(current,"yoffset")) - skipping = false - elseif id == kern_code then - report_injections("kern: %p",getfield(current,"kern")) - skipping = false - elseif not skipping then - report_injections() - skipping = true - end - current = getnext(current) - end -end - -function injections.handler(head,where,keep) - head = tonut(head) - local has_marks, has_cursives, has_kerns = next(marks), next(cursives), next(kerns) - if has_marks or has_cursives then - if trace_injections then - trace(head) - end - -- in the future variant we will not copy items but refs to tables - local done, ky, rl, valid, cx, wx, mk, nofvalid = false, { }, { }, { }, { }, { }, { }, 0 - if has_kerns then -- move outside loop - local nf, tm = nil, nil - for n in traverse_id(glyph_code,head) do -- only needed for relevant fonts - if getsubtype(n) < 256 then - nofvalid = nofvalid + 1 - valid[nofvalid] = n - local f = getfont(n) - if f ~= nf then - nf = f - tm = fontdata[nf].resources.marks -- other hash in ctx - end - if tm then - mk[n] = tm[getchar(n)] - end - local k = getattr(n,a_kernpair) - if k then - local kk = kerns[k] - if kk then - local x, y, w, h = kk[2] or 0, kk[3] or 0, kk[4] or 0, kk[5] or 0 - local dy = y - h - if dy ~= 0 then - ky[n] = dy - end - if w ~= 0 or x ~= 0 then - wx[n] = kk - end - rl[n] = kk[1] -- could move in test - end - end - end - end - else - local nf, tm = nil, nil - for n in traverse_id(glyph_code,head) do - if getsubtype(n) < 256 then - nofvalid = nofvalid + 1 - valid[nofvalid] = n - local f = getfont(n) - if f ~= nf then - nf = f - tm = fontdata[nf].resources.marks -- other hash in ctx - end - if tm then - mk[n] = tm[getchar(n)] - end - end - end - end - if nofvalid > 0 then - -- we can assume done == true because we have cursives and marks - local cx = { } - if has_kerns and next(ky) then - for n, k in next, ky do - setfield(n,"yoffset",k) - end - end - -- todo: reuse t and use maxt - if has_cursives then - local p_cursbase, p = nil, nil - -- since we need valid[n+1] we can also use a "while true do" - local t, d, maxt = { }, { }, 0 - for i=1,nofvalid do -- valid == glyphs - local n = valid[i] - if not mk[n] then - local n_cursbase = getattr(n,a_cursbase) - if p_cursbase then - local n_curscurs = getattr(n,a_curscurs) - if p_cursbase == n_curscurs then - local c = cursives[n_curscurs] - if c then - local rlmode, dx, dy, ws, wn = c[1], c[2], c[3], c[4], c[5] - if rlmode >= 0 then - dx = dx - ws - else - dx = dx + wn - end - if dx ~= 0 then - cx[n] = dx - rl[n] = rlmode - end - -- if rlmode and rlmode < 0 then - dy = -dy - -- end - maxt = maxt + 1 - t[maxt] = p - d[maxt] = dy - else - maxt = 0 - end - end - elseif maxt > 0 then - local ny = getfield(n,"yoffset") - for i=maxt,1,-1 do - ny = ny + d[i] - local ti = t[i] - setfield(ti,"yoffset",getfield(ti,"yoffset") + ny) - end - maxt = 0 - end - if not n_cursbase and maxt > 0 then - local ny = getfield(n,"yoffset") - for i=maxt,1,-1 do - ny = ny + d[i] - local ti = t[i] - setfield(ti,"yoffset",ny) -- maybe add to current yoffset - end - maxt = 0 - end - p_cursbase, p = n_cursbase, n - end - end - if maxt > 0 then - local ny = getfield(n,"yoffset") -- hm, n unset ? - for i=maxt,1,-1 do - ny = ny + d[i] - local ti = t[i] - setfield(ti,"yoffset",ny) - end - maxt = 0 - end - if not keep then - cursives = { } - end - end - if has_marks then - for i=1,nofvalid do - local p = valid[i] - local p_markbase = getattr(p,a_markbase) - if p_markbase then - local mrks = marks[p_markbase] - local nofmarks = #mrks - for n in traverse_id(glyph_code,getnext(p)) do - local n_markmark = getattr(n,a_markmark) - if p_markbase == n_markmark then - local index = getattr(n,a_markdone) or 1 - local d = mrks[index] - if d then - local rlmode = d[3] - -- - local k = wx[p] - local px = getfield(p,"xoffset") - local ox = 0 - if k then - local x = k[2] - local w = k[4] - if w then - if rlmode and rlmode >= 0 then - -- kern(x) glyph(p) kern(w-x) mark(n) - ox = px - getfield(p,"width") + d[1] - (w-x) - -- report_injections("l2r case 1: %p",ox) - else - -- kern(w-x) glyph(p) kern(x) mark(n) - ox = px - d[1] - x - -- report_injections("r2l case 1: %p",ox) - end - else - if rlmode and rlmode >= 0 then - -- okay for husayni - ox = px - getfield(p,"width") + d[1] - -- report_injections("r2l case 2: %p",ox) - else - -- needs checking: is x ok here? - ox = px - d[1] - x - -- report_injections("r2l case 2: %p",ox) - end - end - else - -- if rlmode and rlmode >= 0 then - -- ox = px - getfield(p,"width") + d[1] - -- -- report_injections("l2r case 3: %p",ox) - -- else - -- ox = px - d[1] - -- -- report_injections("r2l case 3: %p",ox) - -- end - -- - -- we need to deal with fonts that have marks with width - -- - local wp = getfield(p,"width") - local wn = getfield(n,"width") -- in arial marks have widths - if rlmode and rlmode >= 0 then - ox = px - wp + d[1] - -- report_injections("l2r case 3: %p",ox) - else - ox = px - d[1] - -- report_injections("r2l case 3: %p",ox) - end - if wn ~= 0 then - -- bad: we should center - insert_node_before(head,n,newkern(-wn/2)) - insert_node_after(head,n,newkern(-wn/2)) - -- wx[n] = { 0, -wn/2, 0, -wn } - end - -- so far - end - setfield(n,"xoffset",ox) - -- - local py = getfield(p,"yoffset") - local oy = 0 - if mk[p] then - oy = py + d[2] - else - oy = getfield(n,"yoffset") + py + d[2] - end - setfield(n,"yoffset",oy) - -- - if nofmarks == 1 then - break - else - nofmarks = nofmarks - 1 - end - end - elseif not n_markmark then - break -- HH: added 2013-09-12: no need to deal with non marks - else - -- KE: there can be <mark> <mkmk> <mark> sequences in ligatures - end - end - end - end - if not keep then - marks = { } - end - end - -- todo : combine - if next(wx) then - for n, k in next, wx do - -- only w can be nil (kernclasses), can be sped up when w == nil - local x = k[2] - local w = k[4] - if w then - local rl = k[1] -- r2l = k[6] - local wx = w - x - if rl < 0 then -- KE: don't use r2l here - if wx ~= 0 then - insert_node_before(head,n,newkern(wx)) -- type 0/2 - end - if x ~= 0 then - insert_node_after (head,n,newkern(x)) -- type 0/2 - end - else - if x ~= 0 then - insert_node_before(head,n,newkern(x)) -- type 0/2 - end - if wx ~= 0 then - insert_node_after (head,n,newkern(wx)) -- type 0/2 - end - end - elseif x ~= 0 then - -- this needs checking for rl < 0 but it is unlikely that a r2l script - -- uses kernclasses between glyphs so we're probably safe (KE has a - -- problematic font where marks interfere with rl < 0 in the previous - -- case) - insert_node_before(head,n,newkern(x)) -- a real font kern, type 0 - end - end - end - if next(cx) then - for n, k in next, cx do - if k ~= 0 then - local rln = rl[n] - if rln and rln < 0 then - insert_node_before(head,n,newkern(-k)) -- type 0/2 - else - insert_node_before(head,n,newkern(k)) -- type 0/2 - end - end - end - end - if not keep then - kerns = { } - end - -- if trace_injections then - -- show_result(head) - -- end - return tonode(head), true - elseif not keep then - kerns, cursives, marks = { }, { }, { } - end - elseif has_kerns then - if trace_injections then - trace(head) - end - for n in traverse_id(glyph_code,head) do - if getsubtype(n) < 256 then - local k = getattr(n,a_kernpair) - if k then - local kk = kerns[k] - if kk then - local rl, x, y, w = kk[1], kk[2] or 0, kk[3], kk[4] - if y and y ~= 0 then - setfield(n,"yoffset",y) -- todo: h ? - end - if w then - -- copied from above - -- local r2l = kk[6] - local wx = w - x - if rl < 0 then -- KE: don't use r2l here - if wx ~= 0 then - insert_node_before(head,n,newkern(wx)) - end - if x ~= 0 then - insert_node_after (head,n,newkern(x)) - end - else - if x ~= 0 then - insert_node_before(head,n,newkern(x)) - end - if wx ~= 0 then - insert_node_after(head,n,newkern(wx)) - end - end - else - -- simple (e.g. kernclass kerns) - if x ~= 0 then - insert_node_before(head,n,newkern(x)) - end - end - end - end - end - end - if not keep then - kerns = { } - end - -- if trace_injections then - -- show_result(head) - -- end - return tonode(head), true - else - -- no tracing needed - end - return tonode(head), false -end |