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authorPhilipp Gesang <phg42.2a@gmail.com>2014-12-22 16:42:02 +0100
committerPhilipp Gesang <phg42.2a@gmail.com>2014-12-22 16:42:02 +0100
commit3a5009d6feedc1a4c4e5a8d61c7e67b9c35399fa (patch)
tree299468068c249d5e8edf663687b3d17c35bc342c /src/fontloader/misc/fontloader-fonts-inj.lua
parentd2a1af0a62a2540c8b88345b8d1e84ba61a8a49f (diff)
downloadluaotfload-3a5009d6feedc1a4c4e5a8d61c7e67b9c35399fa.tar.gz
[fontloader] sync with Context as of 2014-12-22
Diffstat (limited to 'src/fontloader/misc/fontloader-fonts-inj.lua')
-rw-r--r--src/fontloader/misc/fontloader-fonts-inj.lua1286
1 files changed, 852 insertions, 434 deletions
diff --git a/src/fontloader/misc/fontloader-fonts-inj.lua b/src/fontloader/misc/fontloader-fonts-inj.lua
index 4024035..3b93382 100644
--- a/src/fontloader/misc/fontloader-fonts-inj.lua
+++ b/src/fontloader/misc/fontloader-fonts-inj.lua
@@ -1,23 +1,25 @@
-if not modules then modules = { } end modules ['node-inj'] = {
+if not modules then modules = { } end modules ['font-inj'] = {
version = 1.001,
- comment = "companion to node-ini.mkiv",
+ comment = "companion to font-lib.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.
+-- This property based variant is not faster but looks nicer than the attribute one. We
+-- need to use rawget (which is apbout 4 times slower than a direct access but we cannot
+-- get/set that one for our purpose!
--- todo: ignore kerns between disc and glyph
+if not nodes.properties then return end
-local next = next
+local next, rawget = next, rawget
local utfchar = utf.char
-local trace_injections = false trackers.register("nodes.injections", function(v) trace_injections = v end)
+local trace_injections = false trackers.register("fonts.injections", function(v) trace_injections = v end)
-local report_injections = logs.reporter("nodes","injections")
+local report_injections = logs.reporter("fonts","injections")
+
+report_injections("using experimental injector")
local attributes, nodes, node = attributes, nodes, node
@@ -29,6 +31,7 @@ local injections = nodes.injections
local nodecodes = nodes.nodecodes
local glyph_code = nodecodes.glyph
+local disc_code = nodecodes.disc
local kern_code = nodecodes.kern
local nuts = nodes.nuts
@@ -40,207 +43,351 @@ local tonode = nuts.tonode
local tonut = nuts.tonut
local getfield = nuts.getfield
+local setfield = nuts.setfield
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 find_tail = nuts.tail
-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.
+local properties = nodes.properties.data
function injections.installnewkern(nk)
newkern = nk or newkern
end
-local cursives = { }
-local marks = { }
-local kerns = { }
+local nofregisteredkerns = 0
+local nofregisteredpairs = 0
+local nofregisteredmarks = 0
+local nofregisteredcursives = 0
+----- markanchors = { } -- one base can have more marks
+local keepregisteredcounts = false
--- 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.
+function injections.keepcounts()
+ keepregisteredcounts = true
+end
--- For the moment we pass the r2l key ... volt/arabtype tests .. idris: this needs
--- checking with husayni (volt and fontforge).
+function injections.resetcounts()
+ nofregisteredkerns = 0
+ nofregisteredpairs = 0
+ nofregisteredmarks = 0
+ nofregisteredcursives = 0
+ keepregisteredcounts = false
+end
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
+ local p = rawget(properties,start)
+ if p and p.injections then
+ -- todo: decrement counters? tricky as we then need to change the nof* to not increment
+ -- when we change a property
+ p.injections = nil -- should we keep the liga index?
+ end
end
function injections.setligaindex(n,index)
- setattr(n,a_ligacomp,index)
+ local p = rawget(properties,n)
+ if p then
+ local i = p.injections
+ if i then
+ i.ligaindex = index
+ else
+ p.injections = {
+ ligaindex = index
+ }
+ end
+ else
+ properties[n] = {
+ injections = {
+ ligaindex = index
+ }
+ }
+ end
end
function injections.getligaindex(n,default)
- return getattr(n,a_ligacomp) or default
+ local p = rawget(properties,n)
+ if p then
+ p = p.injections
+ if p then
+ return p.ligaindex or default
+ end
+ end
+ return 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])
+function injections.setcursive(start,nxt,factor,rlmode,exit,entry,tfmstart,tfmnext) -- hm: nuts or nodes
+ local dx = factor*(exit[1]-entry[1])
+ local dy = -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
+ nofregisteredcursives = nofregisteredcursives + 1
+ if rlmode < 0 then
+ dx = -(dx + wn)
+ else
+ dx = dx - ws
+ end
+ --
+ local p = rawget(properties,start)
+ if p then
+ local i = p.injections
+ if i then
+ i.cursiveanchor = true
+ else
+ p.injections = {
+ cursiveanchor = true,
+ }
+ end
+ else
+ properties[start] = {
+ injections = {
+ cursiveanchor = true,
+ },
+ }
+ end
+ local p = rawget(properties,nxt)
+ if p then
+ local i = p.injections
+ if i then
+ i.cursivex = dx
+ i.cursivey = dy
+ else
+ p.injections = {
+ cursivex = dx,
+ cursivey = dy,
+ }
+ end
+ else
+ properties[nxt] = {
+ injections = {
+ cursivex = dx,
+ cursivey = dy,
+ },
+ }
+ end
+ return dx, dy, nofregisteredcursives
end
-function injections.setpair(current,factor,rlmode,r2lflag,spec,tfmchr)
+function injections.setpair(current,factor,rlmode,r2lflag,spec,injection) -- r2lflag & tfmchr not used
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
+ if x ~= 0 or w ~= 0 or y ~= 0 or h ~= 0 then -- okay?
+ local yoffset = y - h
+ local leftkern = x -- both kerns are set in a pair kern compared
+ local rightkern = w - x -- to normal kerns where we set only leftkern
+ if leftkern ~= 0 or rightkern ~= 0 or yoffset ~= 0 then
+ nofregisteredpairs = nofregisteredpairs + 1
+ if rlmode and rlmode < 0 then
+ leftkern, rightkern = rightkern, leftkern
+ end
+ local p = rawget(properties,current)
+ if p then
+ local i = p.injections
+ if i then
+ if leftkern ~= 0 or rightkern ~= 0 then
+ i.leftkern = i.leftkern or 0 + leftkern
+ i.rightkern = i.rightkern or 0 + rightkern
+ end
+ if yoffset ~= 0 then
+ i.yoffset = i.yoffset or 0 + yoffset
+ end
+ elseif leftkern ~= 0 or rightkern ~= 0 then
+ p.injections = {
+ leftkern = leftkern,
+ rightkern = rightkern,
+ yoffset = yoffset,
+ }
+ else
+ p.injections = {
+ yoffset = yoffset,
+ }
+ end
+ elseif leftkern ~= 0 or rightkern ~= 0 then
+ properties[current] = {
+ injections = {
+ leftkern = leftkern,
+ rightkern = rightkern,
+ yoffset = yoffset,
+ },
+ }
+ else
+ properties[current] = {
+ injections = {
+ yoffset = yoffset,
+ },
+ }
+ end
+ return x, y, w, h, nofregisteredpairs
+ end
end
return x, y, w, h -- no bound
end
-function injections.setkern(current,factor,rlmode,x,tfmchr)
- local dx = factor*x
+-- 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)
+
+function injections.setkern(current,factor,rlmode,x,injection)
+ local dx = factor * x
if dx ~= 0 then
- local bound = #kerns + 1
- setattr(current,a_kernpair,bound)
- kerns[bound] = { rlmode, dx }
- return dx, bound
+ nofregisteredkerns = nofregisteredkerns + 1
+ local p = rawget(properties,current)
+ if not injection then
+ injection = "injections"
+ end
+ if p then
+ local i = p[injection]
+ if i then
+ i.leftkern = dx + i.leftkern or 0
+ else
+ p[injection] = {
+ leftkern = dx,
+ }
+ end
+ else
+ properties[current] = {
+ [injection] = {
+ leftkern = dx,
+ },
+ }
+ end
+ return dx, nofregisteredkerns
else
return 0, 0
end
end
-function injections.setmark(start,base,factor,rlmode,ba,ma) -- ba=baseanchor, ma=markanchor
+function injections.setmark(start,base,factor,rlmode,ba,ma,tfmbase) -- 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
+ nofregisteredmarks = nofregisteredmarks + 1
+ -- markanchors[nofregisteredmarks] = base
+ if rlmode >= 0 then
+ dx = tfmbase.width - dx -- see later commented ox
+ end
+ local p = rawget(properties,start)
+ if p then
+ local i = p.injections
+ if i then
+ i.markx = dx
+ i.marky = dy
+ i.markdir = rlmode or 0
+ i.markbase = nofregisteredmarks
+ i.markbasenode = base
else
- report_injections("possible problem, %U is base mark without data (id %a)",getchar(base),bound)
+ p.injections = {
+ markx = dx,
+ marky = dy,
+ markdir = rlmode or 0,
+ markbase = nofregisteredmarks,
+ markbasenode = base,
+ }
end
+ else
+ properties[start] = {
+ injections = {
+ markx = dx,
+ marky = dy,
+ markdir = rlmode or 0,
+ markbase = nofregisteredmarks,
+ markbasenode = base,
+ },
+ }
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
+ return dx, dy, nofregisteredmarks
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])
+local function showchar(n,nested)
+ local char = getchar(n)
+ report_injections("%wfont %s, char %U, glyph %c",nested and 2 or 0,getfont(n),char,char)
+end
+
+local function show(n,what,nested,symbol)
+ if n then
+ local p = rawget(properties,n)
+ if p then
+ local p = p[what]
+ if p then
+ local leftkern = p.leftkern or 0
+ local rightkern = p.rightkern or 0
+ local yoffset = p.yoffset or 0
+ local markx = p.markx or 0
+ local marky = p.marky or 0
+ local markdir = p.markdir or 0
+ local markbase = p.markbase or 0 -- will be markbasenode
+ local cursivex = p.cursivex or 0
+ local cursivey = p.cursivey or 0
+ local ligaindex = p.ligaindex or 0
+ local margin = nested and 4 or 2
+ --
+ if rightkern ~= 0 or yoffset ~= 0 then
+ report_injections("%w%s pair: lx %p, rx %p, dy %p",margin,symbol,leftkern,rightkern,yoffset)
+ elseif leftkern ~= 0 then
+ report_injections("%w%s kern: dx %p",margin,symbol,leftkern)
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])
+ if markx ~= 0 or marky ~= 0 or markbase ~= 0 then
+ report_injections("%w%s mark: dx %p, dy %p, dir %s, base %s",margin,symbol,markx,marky,markdir,markbase ~= 0 and "yes" or "no")
+ end
+ if cursivex ~= 0 or cursivey ~= 0 then
+ report_injections("%w%s curs: dx %p, dy %p",margin,symbol,cursivex,cursivey)
+ end
+ if ligaindex ~= 0 then
+ report_injections("%w%s liga: index %i",margin,symbol,ligaindex)
end
end
- if cb then
- report_injections(" cursbase: bound %a",cb)
+ end
+ end
+end
+
+local function showsub(n,what,where)
+ report_injections("begin subrun: %s",where)
+ for n in traverse_id(glyph_code,n) do
+ showchar(n,where)
+ show(n,what,where," ")
+ end
+ report_injections("end subrun")
+end
+
+local function trace(head)
+ report_injections("begin run: %s kerns, %s pairs, %s marks and %s cursives registered",
+ nofregisteredkerns,nofregisteredpairs,nofregisteredmarks,nofregisteredcursives)
+ local n = head
+ while n do
+ local id = getid(n)
+ if id == glyph_code then
+ showchar(n)
+ show(n,"injections",false," ")
+ show(n,"preinjections",false,"<")
+ show(n,"postinjections",false,">")
+ show(n,"replaceinjections",false,"=")
+ elseif id == disc_code then
+ local pre = getfield(n,"pre")
+ local post = getfield(n,"post")
+ local replace = getfield(n,"replace")
+ if pre then
+ showsub(pre,"preinjections","pre")
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])
+ if post then
+ showsub(post,"postinjections","post")
+ end
+ if replace then
+ showsub(replace,"replaceinjections","replace")
end
end
+ n = getnext(n)
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 current = head
local skipping = false
while current do
local id = getid(current)
@@ -259,345 +406,616 @@ local function show_result(head)
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)
+-- we could also check for marks here but maybe not all are registered (needs checking)
+
+local function collect_glyphs_1(head)
+ local glyphs, nofglyphs = { }, 0
+ local marks, nofmarks = { }, 0
+ local nf, tm = nil, nil
+ for n in traverse_id(glyph_code,head) do -- only needed for relevant fonts
+ if getsubtype(n) < 256 then
+ local pn = rawget(properties,n)
+ if pn then
+ pn = pn.injections
+ end
+ local f = getfont(n)
+ if f ~= nf then
+ nf = f
+ tm = fontdata[nf].resources.marks -- other hash in ctx
+ end
+ if tm and tm[getchar(n)] then
+ nofmarks = nofmarks + 1
+ marks[nofmarks] = n
+ else
+ nofglyphs = nofglyphs + 1
+ glyphs[nofglyphs] = n
+ end
+ -- yoffsets can influence curs steps
+ if pn then
+ local yoffset = pn.yoffset
+ if yoffset and yoffset ~= 0 then
+ setfield(n,"yoffset",yoffset)
+ end
+ end
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
+ return glyphs, nofglyphs, marks, nofmarks
+end
+
+local function collect_glyphs_2(head)
+ local glyphs, nofglyphs = { }, 0
+ local marks, nofmarks = { }, 0
+ local nf, tm = nil, nil
+ for n in traverse_id(glyph_code,head) do
+ if getsubtype(n) < 256 then
+ local f = getfont(n)
+ if f ~= nf then
+ nf = f
+ tm = fontdata[nf].resources.marks -- other hash in ctx
+ end
+ if tm and tm[getchar(n)] then
+ nofmarks = nofmarks + 1
+ marks[nofmarks] = n
+ else
+ nofglyphs = nofglyphs + 1
+ glyphs[nofglyphs] = n
+ end
+ end
+ end
+ return glyphs, nofglyphs, marks, nofmarks
+end
+
+local function inject_marks(marks,nofmarks)
+ for i=1,nofmarks do
+ local n = marks[i]
+ local pn = rawget(properties,n)
+ if pn then
+ pn = pn.injections
+ end
+ if pn then
+ -- local markbase = pn.markbase
+ -- if markbase then
+ -- local p = markanchors[markbase]
+ local p = pn.markbasenode
+ if p then
+ local px = getfield(p,"xoffset")
+ local ox = 0
+ local pp = rawget(properties,p)
+ local rightkern = pp and pp.rightkern
+ if rightkern then -- x and w ~= 0
+ if pn.markdir < 0 then
+ -- kern(w-x) glyph(p) kern(x) mark(n)
+ ox = px - pn.markx - rightkern
+ -- report_injections("r2l case 1: %p",ox)
+ else
+ -- kern(x) glyph(p) kern(w-x) mark(n)
+ -- ox = px - getfield(p,"width") + pn.markx - pp.leftkern
+ ox = px - pn.markx - pp.leftkern
+ -- report_injections("l2r case 1: %p",ox)
+ end
+ else
+ -- we need to deal with fonts that have marks with width
+ -- if pn.markdir < 0 then
+ -- ox = px - pn.markx
+ -- -- report_injections("r2l case 3: %p",ox)
+ -- else
+ -- -- ox = px - getfield(p,"width") + pn.markx
+ ox = px - pn.markx
+ -- report_injections("l2r case 3: %p",ox)
+ -- end
+ local wn = getfield(n,"width") -- in arial marks have widths
+ if wn ~= 0 then
+ -- bad: we should center
+ -- insert_node_before(head,n,newkern(-wn/2))
+ -- insert_node_after(head,n,newkern(-wn/2))
+ pn.leftkern = -wn/2
+ pn.rightkern = -wn/2
+ -- wx[n] = { 0, -wn/2, 0, -wn }
+ end
+ -- so far
end
- if tm then
- mk[n] = tm[getchar(n)]
+ setfield(n,"xoffset",ox)
+ --
+ local py = getfield(p,"yoffset")
+ local oy = 0
+ if marks[p] then
+ oy = py + pn.marky
+ else
+ oy = getfield(n,"yoffset") + py + pn.marky
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
+ setfield(n,"yoffset",oy)
+ else
+ -- normally this can't happen (only when in trace mode which is a special case anyway)
+ -- report_injections("missing mark anchor %i",pn.markbase or 0)
+ end
+ -- end
+ end
+ end
+end
+
+local function inject_cursives(glyphs,nofglyphs)
+ local cursiveanchor, lastanchor = nil, nil
+ local minc, maxc, last = 0, 0, nil
+ for i=1,nofglyphs do
+ local n = glyphs[i]
+ local pn = rawget(properties,n)
+ if pn then
+ pn = pn.injections
+ end
+ if pn then
+ local cursivex = pn.cursivex
+ if cursivex then
+ if cursiveanchor then
+ if cursivex ~= 0 then
+ pn.leftkern = pn.leftkern or 0 + cursivex
+ end
+ if lastanchor then
+ if maxc == 0 then
+ minc = lastanchor
end
+ maxc = lastanchor
+ properties[cursiveanchor].cursivedy = pn.cursivey
end
+ last = n
+ else
+ maxc = 0
+ end
+ elseif maxc > 0 then
+ local ny = getfield(n,"yoffset")
+ for i=maxc,minc,-1 do
+ local ti = glyphs[i]
+ ny = ny + properties[ti].cursivedy
+ setfield(ti,"yoffset",ny) -- why not add ?
end
+ maxc = 0
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)]
+ if pn.cursiveanchor then
+ cursiveanchor = n
+ lastanchor = i
+ else
+ cursiveanchor = nil
+ lastanchor = nil
+ if maxc > 0 then
+ local ny = getfield(n,"yoffset")
+ for i=maxc,minc,-1 do
+ local ti = glyphs[i]
+ ny = ny + properties[ti].cursivedy
+ setfield(ti,"yoffset",ny) -- why not add ?
end
+ maxc = 0
end
end
+ elseif maxc > 0 then
+ local ny = getfield(n,"yoffset")
+ for i=maxc,minc,-1 do
+ local ti = glyphs[i]
+ ny = ny + properties[ti].cursivedy
+ setfield(ti,"yoffset",getfield(ti,"yoffset") + ny) -- ?
+ end
+ maxc = 0
+ cursiveanchor = nil
+ lastanchor = nil
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
+ -- if maxc > 0 and not cursiveanchor then
+ -- local ny = getfield(n,"yoffset")
+ -- for i=maxc,minc,-1 do
+ -- local ti = glyphs[i]
+ -- ny = ny + properties[ti].cursivedy
+ -- setfield(ti,"yoffset",ny) -- why not add ?
+ -- end
+ -- maxc = 0
+ -- end
+ end
+ if last and maxc > 0 then
+ local ny = getfield(last,"yoffset")
+ for i=maxc,minc,-1 do
+ local ti = glyphs[i]
+ ny = ny + properties[ti].cursivedy
+ setfield(ti,"yoffset",ny) -- why not add ?
+ end
+ end
+end
+
+local function inject_kerns(head,glyphs,nofglyphs)
+ -- todo: pre/post/replace
+ for i=1,#glyphs do
+ local n = glyphs[i]
+ local pn = rawget(properties,n)
+ if pn then
+ pn = pn.injections
+ end
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ insert_node_before(head,n,newkern(leftkern)) -- type 0/2
+ end
+ local rightkern = pn.rightkern
+ if rightkern and rightkern ~= 0 then
+ insert_node_after(head,n,newkern(rightkern)) -- type 0/2
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
+end
+
+local function inject_everything(head,where)
+ head = tonut(head)
+ if trace_injections then
+ trace(head)
+ end
+ local glyphs, nofglyphs, marks, nofmarks
+ if nofregisteredpairs > 0 then
+ glyphs, nofglyphs, marks, nofmarks = collect_glyphs_1(head)
+ else
+ glyphs, nofglyphs, marks, nofmarks = collect_glyphs_2(head)
+ end
+ if nofglyphs > 0 then
+ if nofregisteredcursives > 0 then
+ inject_cursives(glyphs,nofglyphs)
+ end
+ if nofregisteredmarks > 0 then
+ inject_marks(marks,nofmarks)
+ end
+ inject_kerns(head,glyphs,nofglyphs)
+ end
+ if keepregisteredcounts then
+ keepregisteredcounts = false
+ else
+ nofregisteredkerns = 0
+ nofregisteredpairs = 0
+ nofregisteredmarks = 0
+ nofregisteredcursives = 0
+ end
+ return tonode(head), true
+end
+
+local function inject_kerns_only(head,where)
+ head = tonut(head)
+ if trace_injections then
+ trace(head)
+ end
+ local n = head
+ local p = nil
+ while n do
+ local id = getid(n)
+ if id == glyph_code then
+ if getsubtype(n) < 256 then
+ local pn = rawget(properties,n)
+ if pn then
+ if p then
+ local d = getfield(p,"post")
+ if d then
+ local pn = pn.postinjections
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ local t = find_tail(d)
+ insert_node_after(d,t,newkern(leftkern))
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
+ local d = getfield(p,"replace")
+ if d then
+ local pn = pn.replaceinjections
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ local t = find_tail(d)
+ insert_node_after(d,t,newkern(leftkern))
+ end
+ end
+ else
+ local pn = pn.injections
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ setfield(p,"replace",newkern(leftkern))
+ end
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
+ else
+ local pn = pn.injections
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ head = insert_node_before(head,n,newkern(leftkern))
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)
+ else
+ break
+ end
+ p = nil
+ elseif id == disc_code then
+ local d = getfield(n,"pre")
+ if d then
+ local h = d
+ for n in traverse_id(glyph_code,d) do
+ if getsubtype(n) < 256 then
+ local pn = rawget(properties,n)
+ if pn then
+ pn = pn.preinjections
+ end
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ h = insert_node_before(h,n,newkern(leftkern))
+ end
+ end
+ else
+ break
end
- maxt = 0
end
- if not keep then
- cursives = { }
+ if h ~= d then
+ setfield(n,"pre",h)
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
+ local d = getfield(n,"post")
+ if d then
+ local h = d
+ for n in traverse_id(glyph_code,d) do
+ if getsubtype(n) < 256 then
+ local pn = rawget(properties,n)
+ if pn then
+ pn = pn.postinjections
+ end
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ h = insert_node_before(h,n,newkern(leftkern))
end
end
+ else
+ break
end
end
- if not keep then
- marks = { }
+ if h ~= d then
+ setfield(n,"post",h)
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
+ local d = getfield(n,"replace")
+ if d then
+ local h = d
+ for n in traverse_id(glyph_code,d) do
+ if getsubtype(n) < 256 then
+ local pn = rawget(properties,n) -- why can it be empty { }
+ if pn then
+ pn = pn.replaceinjections
+ end
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ h = insert_node_before(h,n,newkern(leftkern))
end
- if x ~= 0 then
- insert_node_after (head,n,newkern(x)) -- type 0/2
+ end
+ else
+ break
+ end
+ end
+ if h ~= d then
+ setfield(n,"replace",h)
+ end
+ end
+ p = n
+ else
+ p = nil
+ end
+ n = getnext(n)
+ end
+ --
+ if keepregisteredcounts then
+ keepregisteredcounts = false
+ else
+ nofregisteredkerns = 0
+ end
+ return tonode(head), true
+end
+
+local function inject_pairs_only(head,where)
+ head = tonut(head)
+ if trace_injections then
+ trace(head)
+ end
+ --
+ local n = head
+ local p = nil
+ while n do
+ local id = getid(n)
+ if id == glyph_code then
+ if getsubtype(n) < 256 then
+ local pn = rawget(properties,n)
+ if pn then
+ if p then
+ local d = getfield(p,"post")
+ if d then
+ local pn = pn.postinjections
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ local t = find_tail(d)
+ insert_node_after(d,t,newkern(leftkern))
+ end
+ -- local rightkern = pn.rightkern
+ -- if rightkern and rightkern ~= 0 then
+ -- insert_node_after(head,n,newkern(rightkern))
+ -- n = getnext(n) -- to be checked
+ -- end
+ end
+ end
+ local d = getfield(p,"replace")
+ if d then
+ local pn = pn.replaceinjections
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ local t = find_tail(d)
+ insert_node_after(d,t,newkern(leftkern))
+ end
+ -- local rightkern = pn.rightkern
+ -- if rightkern and rightkern ~= 0 then
+ -- insert_node_after(head,n,newkern(rightkern))
+ -- n = getnext(n) -- to be checked
+ -- end
end
else
- if x ~= 0 then
- insert_node_before(head,n,newkern(x)) -- type 0/2
+ local pn = pn.injections
+ if pn then
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ setfield(p,"replace",newkern(leftkern))
+ end
+ -- local rightkern = pn.rightkern
+ -- if rightkern and rightkern ~= 0 then
+ -- insert_node_after(head,n,newkern(rightkern))
+ -- n = getnext(n) -- to be checked
+ -- end
+ end
+ end
+ else
+ -- this is the most common case
+ local pn = pn.injections
+ if pn then
+ local yoffset = pn.yoffset
+ if yoffset and yoffset ~= 0 then
+ setfield(n,"yoffset",yoffset)
end
- if wx ~= 0 then
- insert_node_after (head,n,newkern(wx)) -- type 0/2
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ insert_node_before(head,n,newkern(leftkern))
+ end
+ local rightkern = pn.rightkern
+ if rightkern and rightkern ~= 0 then
+ insert_node_after(head,n,newkern(rightkern))
+ n = getnext(n) -- to be checked
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
+ else
+ break
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
+ p = nil
+ elseif id == disc_code then
+ local d = getfield(n,"pre")
+ if d then
+ local h = d
+ for n in traverse_id(glyph_code,d) do
+ if getsubtype(n) < 256 then
+ local pn = rawget(properties,n)
+ if pn then
+ pn = pn.preinjections
end
+ if pn then
+ local yoffset = pn.yoffset
+ if yoffset and yoffset ~= 0 then
+ setfield(n,"yoffset",yoffset)
+ end
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ h = insert_node_before(h,n,newkern(leftkern))
+ end
+ local rightkern = pn.rightkern
+ if rightkern and rightkern ~= 0 then
+ insert_node_after(head,n,newkern(rightkern))
+ n = getnext(n) -- to be checked
+ end
+ end
+ else
+ break
end
end
+ if h ~= d then
+ setfield(n,"pre",h)
+ end
end
- if not keep then
- kerns = { }
+ local d = getfield(n,"post")
+ if d then
+ local h = d
+ for n in traverse_id(glyph_code,d) do
+ if getsubtype(n) < 256 then
+ local pn = rawget(properties,n)
+ if pn then
+ pn = pn.postinjections
+ end
+ if pn then
+ local yoffset = pn.yoffset
+ if yoffset and yoffset ~= 0 then
+ setfield(n,"yoffset",yoffset)
+ end
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ h = insert_node_before(h,n,newkern(leftkern))
+ end
+ local rightkern = pn.rightkern
+ if rightkern and rightkern ~= 0 then
+ insert_node_after(head,n,newkern(rightkern))
+ n = getnext(n) -- to be checked
+ end
+ end
+ else
+ break
+ end
+ end
+ if h ~= d then
+ setfield(n,"post",h)
+ end
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 ?
+ local d = getfield(n,"replace")
+ if d then
+ local h = d
+ for n in traverse_id(glyph_code,d) do
+ if getsubtype(n) < 256 then
+ local pn = rawget(properties,n)
+ if pn then
+ pn = pn.replaceinjections
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
+ if pn then
+ local yoffset = pn.yoffset
+ if yoffset and yoffset ~= 0 then
+ setfield(n,"yoffset",yoffset)
end
- else
- -- simple (e.g. kernclass kerns)
- if x ~= 0 then
- insert_node_before(head,n,newkern(x))
+ local leftkern = pn.leftkern
+ if leftkern ~= 0 then
+ h = insert_node_before(h,n,newkern(leftkern))
+ end
+ local rightkern = pn.rightkern
+ if rightkern and rightkern ~= 0 then
+ insert_node_after(head,n,newkern(rightkern))
+ n = getnext(n) -- to be checked
end
end
+ else
+ break
end
end
+ if h ~= d then
+ setfield(n,"replace",h)
+ end
end
+ p = n
+ else
+ p = nil
end
- if not keep then
- kerns = { }
- end
- -- if trace_injections then
- -- show_result(head)
- -- end
- return tonode(head), true
+ n = getnext(n)
+ end
+ --
+ if keepregisteredcounts then
+ keepregisteredcounts = false
+ else
+ nofregisteredpairs = 0
+ nofregisteredkerns = 0
+ end
+ return tonode(head), true
+end
+
+function injections.handler(head,where) -- optimize for n=1 ?
+ if nofregisteredmarks > 0 or nofregisteredcursives > 0 then
+ return inject_everything(head,where)
+ elseif nofregisteredpairs > 0 then
+ return inject_pairs_only(head,where)
+ elseif nofregisteredkerns > 0 then
+ return inject_kerns_only(head,where)
else
- -- no tracing needed
+ return head, false
end
- return tonode(head), false
end