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|
if not modules then modules = { } end modules ['lpdf-ini'] = {
version = 1.001,
comment = "companion to lpdf-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- vkgoeswild: Pink Floyd - Shine on You Crazy Diamond - piano cover
-- At some point I wanted to have access to the shapes so that we could use them in
-- metapost. So, after looking at the cff and ttf specifications, I decided to write
-- parsers. At somepoint we needed a cff parser anyway in order to calculate the
-- dimensions. Then variable fonts came around and a option was added to recreate
-- streams of operators and a logical next step was to do all inclusion that way. It
-- was only then that I found out that some of the juggling also happens in the the
-- backend, but spread over places, so I could have saved myself some time
-- deciphering the specifications. Anyway, here we go.
local next, type, unpack = next, type, unpack
local char, byte, gsub, sub, match, rep, gmatch = string.char, string.byte, string.gsub, string.sub, string.match, string.rep, string.gmatch
local formatters = string.formatters
local format = string.format
local concat, sortedhash, sort = table.concat, table.sortedhash, table.sort
local utfchar = utf.char
local random, round, max, abs, ceiling = math.random, math.round, math.max, math.abs, math.ceiling
local extract, lshift, rshift, band, bor = bit32.extract, bit32.lshift, bit32.rshift, bit32.band, bit32.bor
local idiv = number.idiv
local setmetatableindex = table.setmetatableindex
local pdfnull = lpdf.null
local pdfdictionary = lpdf.dictionary
local pdfarray = lpdf.array
local pdfconstant = lpdf.constant
local pdfstring = lpdf.string
local pdfreference = lpdf.reference
local pdfreserveobject = lpdf.reserveobject
local pdfflushobject = lpdf.flushobject
local pdfflushstreamobject = lpdf.flushstreamobject
local fontstreams = fonts.hashes.streams
local report_fonts = logs.reporter("backend","fonts")
local trace_fonts = false
local trace_detail = false
trackers.register("backend.pdf.fonts",function(v) trace_fonts = v end)
local readers = fonts.handlers.otf.readers
local getinfo = readers.getinfo
local setposition = utilities.files.setposition
local readstring = utilities.files.readstring
local openfile = utilities.files.open
local closefile = utilities.files.close
-- needs checking: signed vs unsigned
local tocardinal1 = char
local function tocardinal2(n)
return char(extract(n,8,8),extract(n,0,8))
end
local function tocardinal3(n)
return char(extract(n,16,8),extract(n,8,8),extract(n,0,8))
end
local function tocardinal4(n)
return char(extract(n,24,8),extract(n,16,8),extract(n,8,8),extract(n,0,8))
end
local function tointeger2(n)
return char(extract(n,8,8),extract(n,0,8))
end
local function tointeger3(n)
return char(extract(n,16,8),extract(n,8,8),extract(n,0,8))
end
local function tointeger4(n)
return char(extract(n,24,8),extract(n,16,8),extract(n,8,8),extract(n,0,8))
end
local function tocardinal8(n)
local l = idiv(n,0x100000000)
local r = n % 0x100000000
return char(extract(l,24,8),extract(l,16,8),extract(l,8,8),extract(l,0,8),
extract(r,24,8),extract(r,16,8),extract(r,8,8),extract(r,0,8))
end
-- A couple of shared helpers.
local tounicodedictionary, widtharray, collectindices, subsetname, includecidset, tocidsetdictionary
do
-- Because we supply tounicodes ourselves we only use bfchar mappings (as in the
-- backend). In fact, we can now no longer pass the tounicodes to the frontend but
-- pick them up from the descriptions.
local f_mapping = formatters["<%04X> <%s>"]
local tounicode = fonts.mappings.tounicode
local tounicode_template = [[
%%!PS-Adobe-3.0 Resource-CMap
%%%%DocumentNeededResources: ProcSet (CIDInit)
%%%%IncludeResource: ProcSet (CIDInit)
%%%%BeginResource: CMap (TeX-%s-0)
%%%%Title: (TeX-%s-0 TeX %s 0)|
%%%%Version: 1.000
%%%%EndComments
/CIDInit /ProcSet findresource begin
12 dict begin
begincmap
/CIDSystemInfo
<< /Registry (TeX) /Ordering (%s) /Supplement 0 >>
def
/CMapName
/TeX-Identity-%s
def
/CMapType
2
def
1 begincodespacerange
<0000> <FFFF>
endcodespacerange
%i beginbfchar
%s
endbfchar
endcmap
CMapName currentdict /CMap defineresource pop
end
end
%%%%EndResource
%%%%EOF]]
tounicodedictionary = function(details,indices,maxindex,name)
local mapping = { }
local length = 0
if maxindex > 0 then
for index=1,maxindex do
local data = indices[index]
if data then
length = length + 1
local unicode = data.unicode
if unicode then
unicode = tounicode(unicode)
else
unicode = "FFFD"
end
mapping[length] = f_mapping(index,unicode)
end
end
end
local name = gsub(name,"%+","-") -- like luatex does
local blob = format(tounicode_template,name,name,name,name,name,length,concat(mapping,"\n"))
return blob
end
widtharray = function(details,indices,maxindex,units)
local widths = pdfarray()
local length = 0
local factor = 10000 / units
if maxindex > 0 then
local lastindex = -1
local sublist = nil
for index=1,maxindex do
local data = indices[index]
if data then
local width = data.width -- hm, is inaccurate for cff, so take from elsewhere
if width then
-- width = round(width * 10000 / units) / 10
width = round(width * factor) / 10
else
width = 0
end
if index == lastindex + 1 then
sublist[#sublist+1] = width
else
if sublist then
length = length + 1
widths[length] = sublist
end
sublist = pdfarray { width }
length = length + 1
widths[length] = index
end
lastindex = index
end
end
length = length + 1
widths[length] = sublist
end
return widths
end
collectindices = function(descriptions,indices)
local minindex = 0xFFFF
local maxindex = 0
local reverse = { }
-- todo: already at definition time trigger copying streams
-- and add extra indices ... first i need a good example of
-- a clash
-- for unicode, data in next, descriptions do
-- local i = data.index or unicode
-- if reverse[i] then
-- print("CLASH")
-- else
-- reverse[i] = data
-- end
-- end
for unicode, data in next, descriptions do
reverse[data.index or unicode] = data
end
for index in next, indices do
if index > maxindex then
maxindex = index
end
if index < minindex then
minindex = index
end
indices[index] = reverse[index]
end
if minindex > maxindex then
minindex = maxindex
end
return indices, minindex, maxindex
end
includecidset = false
tocidsetdictionary = function(indices,min,max)
if includecidset then
local b = { }
local m = idiv(max+7,8)
for i=0,max do
b[i] = 0
end
for i=min,max do
if indices[i] then
local bi = idiv(i,8)
local ni = i % 8
b[bi] = bor(b[bi],lshift(1,7-ni))
end
end
b = char(unpack(b,0,#b))
return pdfreference(pdfflushstreamobject(b))
end
end
-- Actually we can use the same as we only embed once.
-- subsetname = function(name)
-- return "CONTEXT" .. name
-- end
local prefixes = { } -- todo: set fixed one
subsetname = function(name)
local prefix
while true do
prefix = utfchar(random(65,90),random(65,90),random(65,90),random(65,90),random(65,90),random(65,90))
if not prefixes[prefix] then
prefixes[prefix] = true
break
end
end
return prefix .. "+" .. name
end
end
-- Map file mess.
local loadmapfile, loadmapline, getmapentry do
-- We only need to pick up the filename and optionally the enc file
-- as we only use them for old school virtual math fonts. We might as
-- we drop this completely.
local find, match, splitlines = string.find, string.match, string.splitlines
local mappings = { }
loadmapline = function(n)
local name, fullname, encfile, pfbfile = match(n,"(%S+)%s+(%S+).-<(.-%.enc).-<(.-%.pfb)")
if name then
mappings[name] = { fullname, encfile, pfbfile }
end
end
loadmapfile = function(n)
local okay, data = resolvers.loadbinfile(n,"map")
if okay and data then
data = splitlines(data)
for i=1,#data do
local d = data[i]
if d ~= "" and not find(d,"^[#%%]") then
loadmapline(d)
end
end
end
end
getmapentry = function(n)
local n = file.nameonly(n)
local m = mappings[n]
if m then
local encfile = m[2]
local encoding = fonts.encodings.load(encfile)
if not encoding then
return
end
local pfbfile = resolvers.find_file(m[3],"pfb")
if not pfbfile or pfbfile == "" then
return
end
return encoding, pfbfile, encfile
end
end
end
-- The three writers: opentype, truetype and type1.
local mainwriters = { }
do
-- advh = os2.ascender - os2.descender
-- tsb = default_advh - os2.ascender
-- truetype has the following tables:
-- head : mandate
-- hhea : mandate
-- vhea : mandate
-- hmtx : mandate
-- maxp : mandate
-- glyf : mandate
-- loca : mandate
--
-- cvt : if needed (but we flatten)
-- fpgm : if needed (but we flatten)
-- prep : if needed (but we flatten)
-- PCLT : if needed (but we flatten)
--
-- name : not needed for T2: backend does that
-- post : not needed for T2: backend does that
-- OS/2 : not needed for T2: backend does that
-- cmap : not needed for T2: backend does that
local streams = utilities.streams
local openstring = streams.openstring
local readcardinal2 = streams.readcardinal2
----- readcardinal4 = streams.readcardinal4
local otfreaders = fonts.handlers.otf.readers
local function readcardinal4(f) -- this needs to be sorted out
local a = readcardinal2(f)
local b = readcardinal2(f)
if a and b then
return a * 0x10000 + b
end
end
-- -- --
local tablereaders = { }
local tablewriters = { }
local tablecreators = { }
local tableloaders = { }
local openfontfile, closefontfile, makefontfile, makemetadata do
local details = {
details = true,
platformnames = true,
platformextras = true,
}
-- .022 sec on luatex manual, neglectable:
-- local function checksum(data)
-- local s = openstring(data)
-- local n = 0
-- local d = #data
-- while true do
-- local c = readcardinal4(s)
-- if c then
-- n = (n + c) % 0x100000000
-- else
-- break
-- end
-- end
-- return n
-- end
local function checksum(data)
local s = openstring(data)
local n = 0
local d = #data
while true do
local a = readcardinal2(s)
local b = readcardinal2(s)
if b then
n = (n + a * 0x10000 + b) % 0x100000000
else
break
end
end
return n
end
openfontfile = function(details)
return {
offset = 0,
order = { },
used = { },
details = details,
streams = details.streams,
}
end
closefontfile = function(fontfile)
for k, v in next, fontfile do
fontfile[k] = nil -- so it can be collected asap
end
end
local metakeys = {
"uniqueid", "version",
"copyright", "license", "licenseurl",
"manufacturer", "vendorurl",
"family", "subfamily",
"typographicfamily", "typographicsubfamily",
"fullname", "postscriptname",
}
local template = [[
<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>
<x:xmpmeta xmlns:x="adobe:ns:meta/">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<rdf:Description rdf:about="" xmlns:pdfx="http://ns.adobe.com/pdfx/1.3/">
%s
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>
<?xpacket end="w"?>]]
makemetadata = function(fontfile)
local names = fontfile.streams.names
local list = { }
local f_name = formatters["<pdfx:%s>%s</pdfx:%s>"]
for i=1,#metakeys do
local m = metakeys[i]
local n = names[m]
if n then
list[#list+1] = f_name(m,n,m)
end
end
return format(template,concat(list,"\n"))
end
makefontfile = function(fontfile)
local order = fontfile.order
local used = fontfile.used
local count = 0
for i=1,#order do
local tag = order[i]
local data = fontfile[tag]
if data and #data > 0 then
count = count + 1
else
fontfile[tag] = false
end
end
local offset = 12 + (count * 16)
local headof = 0
local list = {
"" -- placeholder
}
local i = 1
local k = 0
while i <= count do
i = lshift(i,1)
k = k + 1
end
local searchrange = lshift(i,3)
local entryselector = k - 1
local rangeshift = lshift(count,4) - lshift(i,3)
local index = {
tocardinal4(0x00010000), -- tables.version
tocardinal2(count),
tocardinal2(searchrange),
tocardinal2(entryselector),
tocardinal2(rangeshift),
}
--
local ni = #index
local nl = #list
for i=1,#order do
local tag = order[i]
local data = fontfile[tag]
if data then
local csum = checksum(data)
local dlength = #data
local length = idiv(dlength+3,4) * 4
local padding = length - dlength
nl = nl + 1 ; list[nl] = data
for i=1,padding do
nl = nl + 1 ; list[nl] = "\0"
end
if #tag == 3 then
tag = tag .. " "
end
ni = ni + 1 ; index[ni] = tag -- must be 4 chars
ni = ni + 1 ; index[ni] = tocardinal4(csum)
ni = ni + 1 ; index[ni] = tocardinal4(offset)
ni = ni + 1 ; index[ni] = tocardinal4(dlength)
used[i] = offset -- not used
if tag == "head" then
headof = offset
end
offset = offset + length
end
end
list[1] = concat(index)
local off = #list[1] + headof + 1 + 8
list = concat(list)
local csum = (0xB1B0AFBA - checksum(list)) % 0x100000000
list = sub(list,1,off-1) .. tocardinal4(csum) .. sub(list,off+4,#list)
return list
end
local function register(fontfile,name)
local u = fontfile.used
local o = fontfile.order
if not u[name] then
o[#o+1] = name
u[name] = true
end
end
local function create(fontfile,name)
local t = { }
fontfile[name] = t
return t
end
local function write(fontfile,name)
local t = fontfile[name]
if not t then
return
end
register(fontfile,name)
if type(t) == "table" then
if t[0] then
fontfile[name] = concat(t,"",0,#t)
elseif #t > 0 then
fontfile[name] = concat(t)
else
fontfile[name] = false
end
end
end
tablewriters.head = function(fontfile)
register(fontfile,"head")
local t = fontfile.streams.fontheader
fontfile.head = concat {
tocardinal4(t.version),
tocardinal4(t.fontversionnumber),
tocardinal4(t.checksum),
tocardinal4(t.magic),
tocardinal2(t.flags),
tocardinal2(t.units),
tocardinal8(t.created),
tocardinal8(t.modified),
tocardinal2(t.xmin),
tocardinal2(t.ymin),
tocardinal2(t.xmax),
tocardinal2(t.ymax),
tocardinal2(t.macstyle),
tocardinal2(t.smallpixels),
tocardinal2(t.directionhint),
tocardinal2(t.indextolocformat),
tocardinal2(t.glyphformat),
}
end
tablewriters.hhea = function(fontfile)
register(fontfile,"hhea")
local t = fontfile.streams.horizontalheader
local n = t and fontfile.nofglyphs or 0
fontfile.hhea = concat {
tocardinal4(t.version),
tocardinal2(t.ascender),
tocardinal2(t.descender),
tocardinal2(t.linegap),
tocardinal2(t.maxadvancewidth),
tocardinal2(t.minleftsidebearing),
tocardinal2(t.minrightsidebearing),
tocardinal2(t.maxextent),
tocardinal2(t.caretsloperise),
tocardinal2(t.caretsloperun),
tocardinal2(t.caretoffset),
tocardinal2(t.reserved_1),
tocardinal2(t.reserved_2),
tocardinal2(t.reserved_3),
tocardinal2(t.reserved_4),
tocardinal2(t.metricdataformat),
tocardinal2(n) -- t.nofmetrics
}
end
tablewriters.vhea = function(fontfile)
local t = fontfile.streams.verticalheader
local n = t and fontfile.nofglyphs or 0
register(fontfile,"vhea")
fontfile.vhea = concat {
tocardinal4(t.version),
tocardinal2(t.ascender),
tocardinal2(t.descender),
tocardinal2(t.linegap),
tocardinal2(t.maxadvanceheight),
tocardinal2(t.mintopsidebearing),
tocardinal2(t.minbottomsidebearing),
tocardinal2(t.maxextent),
tocardinal2(t.caretsloperise),
tocardinal2(t.caretsloperun),
tocardinal2(t.caretoffset),
tocardinal2(t.reserved_1),
tocardinal2(t.reserved_2),
tocardinal2(t.reserved_3),
tocardinal2(t.reserved_4),
tocardinal2(t.metricdataformat),
tocardinal2(n) -- t.nofmetrics
}
end
tablewriters.maxp = function(fontfile)
register(fontfile,"maxp")
local t = fontfile.streams.maximumprofile
local n = fontfile.nofglyphs
-- if fontfile.streams.cffinfo then
-- error
-- end
fontfile.maxp = concat {
tocardinal4(0x00010000),
tocardinal2(n),
tocardinal2(t.points),
tocardinal2(t.contours),
tocardinal2(t.compositepoints),
tocardinal2(t.compositecontours),
tocardinal2(t.zones),
tocardinal2(t.twilightpoints),
tocardinal2(t.storage),
tocardinal2(t.functiondefs),
tocardinal2(t.instructiondefs),
tocardinal2(t.stackelements),
tocardinal2(t.sizeofinstructions),
tocardinal2(t.componentelements),
tocardinal2(t.componentdepth),
}
end
tablecreators.loca = function(fontfile) return create(fontfile,"loca") end
tablewriters .loca = function(fontfile) return write (fontfile,"loca") end
tablecreators.glyf = function(fontfile) return create(fontfile,"glyf") end
tablewriters .glyf = function(fontfile) return write (fontfile,"glyf") end
tablecreators.hmtx = function(fontfile) return create(fontfile,"hmtx") end
tablewriters .hmtx = function(fontfile) return write (fontfile,"hmtx") end
tablecreators.vmtx = function(fontfile) return create(fontfile,"vmtx") end
tablewriters .vmtx = function(fontfile) return write (fontfile,"vmtx") end
tableloaders .cmap = function(fontfile) return read (fontfile,"cmap") end
tablewriters .cmap = function(fontfile) return write (fontfile,"cmap") end
tableloaders .name = function(fontfile) return read (fontfile,"name") end
tablewriters .name = function(fontfile) return write (fontfile,"name") end
tableloaders .post = function(fontfile) return read (fontfile,"post") end
tablewriters .post = function(fontfile) return write (fontfile,"post") end
end
mainwriters["truetype"] = function(details)
--
local fontfile = openfontfile(details)
local basefontname = details.basefontname
local streams = details.streams
local blobs = streams.streams
local fontheader = streams.fontheader
local horizontalheader = streams.horizontalheader
local verticalheader = streams.verticalheader
local maximumprofile = streams.maximumprofile
local names = streams.names
local descriptions = details.rawdata.descriptions
local metadata = details.rawdata.metadata
local indices = details.indices
local metabbox = { fontheader.xmin, fontheader.ymin, fontheader.xmax, fontheader.ymax }
local indices,
minindex,
maxindex = collectindices(descriptions,indices)
local glyphstreams = tablecreators.glyf(fontfile)
local locations = tablecreators.loca(fontfile)
local horizontals = tablecreators.hmtx(fontfile)
local verticals = tablecreators.vmtx(fontfile)
--
local zero2 = tocardinal2(0)
local zero4 = tocardinal4(0)
--
local horizontal = horizontalheader.nofmetrics > 0
local vertical = verticalheader.nofmetrics > 0
--
local streamoffset = 0
local lastoffset = zero4
local g, h, v = 0, 0, 0
--
-- todo: locate notdef
--
if minindex > 0 then
local blob = blobs[0]
if blob and #blob > 0 then
locations[0] = lastoffset
g = g + 1 ; glyphstreams[g] = blob
h = h + 1 ; horizontals [h] = zero4
if vertical then
v = v + 1 ; verticals[v] = zero4
end
streamoffset = streamoffset + #blob
lastoffset = tocardinal4(streamoffset)
else
print("missing .notdef")
end
-- todo: use a rep for h/v
for index=1,minindex-1 do
locations[index] = lastoffset
h = h + 1 ; horizontals[h] = zero4
if vertical then
v = v + 1 ; verticals[v] = zero4
end
end
end
for index=minindex,maxindex do
locations[index] = lastoffset
local data = indices[index]
if data then
local blob = blobs[index] -- we assume padding
if blob and #blob > 0 then
g = g + 1 ; glyphstreams[g] = blob
h = h + 1 ; horizontals [h] = tocardinal2(data.width or 0)
h = h + 1 ; horizontals [h] = tocardinal2(data.boundingbox[1])
if vertical then
v = v + 1 ; verticals[v] = tocardinal2(data.height or 0)
v = v + 1 ; verticals[v] = tocardinal2(data.boundingbox[3])
end
streamoffset = streamoffset + #blob
lastoffset = tocardinal4(streamoffset)
else
h = h + 1 ; horizontals[h] = zero4
if vertical then
v = v + 1 ; verticals[v] = zero4
end
print("missing blob for index",index)
end
else
h = h + 1 ; horizontals[h] = zero4
if vertical then
v = v + 1 ; verticals[v] = zero4
end
end
end
locations[maxindex+1] = lastoffset -- cf spec
--
local nofglyphs = maxindex + 1 -- include zero
--
fontheader.checksum = 0
fontheader.indextolocformat = 1
maximumprofile.nofglyphs = nofglyphs
--
fontfile.format = "tff"
fontfile.basefontname = basefontname
fontfile.nofglyphs = nofglyphs
--
tablewriters.head(fontfile)
tablewriters.hhea(fontfile)
if vertical then
tablewriters.vhea(fontfile)
end
tablewriters.maxp(fontfile)
tablewriters.loca(fontfile)
tablewriters.glyf(fontfile)
tablewriters.hmtx(fontfile)
if vertical then
tablewriters.vmtx(fontfile)
end
--
local fontdata = makefontfile(fontfile)
local fontmeta = makemetadata(fontfile)
--
fontfile = closefontfile(fontfile)
--
local units = metadata.units
local basefont = pdfconstant(basefontname)
local widths = widtharray(details,indices,maxindex,units)
local object = details.objectnumber
local tounicode = tounicodedictionary(details,indices,maxindex,basefontname)
local tocidset = tocidsetdictionary(indices,minindex,maxindex)
local metabbox = metadata.boundingbox or { 0, 0, 0, 0 }
local fontbbox = pdfarray { unpack(metabbox) }
local ascender = metadata.ascender
local descender = metadata.descender
local capheight = metadata.capheight or fontbbox[4]
local stemv = metadata.weightclass
local italicangle = metadata.italicangle
local xheight = metadata.xheight or fontbbox[4]
--
if stemv then
stemv = (stemv/65)^2 + 50
end
--
local function scale(n)
if n then
return round((n) * 10000 / units) / 10
else
return 0
end
end
--
local reserved = pdfreserveobject()
local child = pdfdictionary {
Type = pdfconstant("Font"),
Subtype = pdfconstant("CIDFontType2"),
BaseFont = basefont,
FontDescriptor = pdfreference(reserved),
W = pdfreference(pdfflushobject(widths)),
CIDToGIDMap = pdfconstant("Identity"),
CIDSystemInfo = pdfdictionary {
Registry = pdfstring("Adobe"),
Ordering = pdfstring("Identity"),
Supplement = 0,
}
}
local descendants = pdfarray {
pdfreference(pdfflushobject(child)),
}
local descriptor = pdfdictionary {
Type = pdfconstant("FontDescriptor"),
FontName = basefont,
Flags = 4,
FontBBox = fontbbox,
Ascent = scale(ascender),
Descent = scale(descender),
ItalicAngle = round(italicangle or 0),
CapHeight = scale(capheight),
StemV = scale(stemv),
XHeight = scale(xheight),
FontFile2 = pdfreference(pdfflushstreamobject(fontdata)),
CIDSet = tocidset,
Metadata = fontmeta and pdfreference(pdfflushstreamobject(fontmeta)) or nil,
}
local parent = pdfdictionary {
Type = pdfconstant("Font"),
Subtype = pdfconstant("Type0"),
Encoding = pdfconstant(details.properties.writingmode == "vertical" and "Identity-V" or "Identity-H"),
BaseFont = basefont,
DescendantFonts = descendants,
ToUnicode = pdfreference(pdfflushstreamobject(tounicode)),
}
pdfflushobject(reserved,descriptor)
pdfflushobject(object,parent)
--
-- if trace_detail then
-- local name = "temp.ttf"
-- report_fonts("saving %a",name)
-- io.savedata(name,fontdata)
-- inspect(fonts.handlers.otf.readers.loadfont(name))
-- end
--
end
do
-- todo : cff2
local details = {
details = true,
platformnames = true,
platformextras = true,
}
tablecreators.cff = function(fontfile)
fontfile.charstrings = { }
fontfile.charmappings = { }
fontfile.cffstrings = { }
fontfile.cffhash = { }
return fontfile.charstrings , fontfile.charmappings
end
local todictnumber, todictreal, todictinteger, todictoffset do
local maxnum = 0x7FFFFFFF
local minnum = - 0x7FFFFFFF - 1
local epsilon = 1.0e-5
local int2tag = "\28"
local int4tag = "\29"
local realtag = "\30"
todictinteger = function(n)
if not n then
return char(band(139,0xFF))
elseif n >= -107 and n <= 107 then
return char(band(n + 139,0xFF))
elseif n >= 108 and n <= 1131 then
n = 0xF700 + n - 108
return char(band(rshift(n,8),0xFF),band(n,0xFF))
elseif n >= -1131 and n <= -108 then
n = 0xFB00 - n - 108
return char(band(rshift(n,8),0xFF),band(n,0xFF))
elseif n >= -32768 and n <= 32767 then
-- return int2tag .. tointeger2(n)
return char(28,extract(n,8,8),extract(n,0,8))
else
-- return int4tag .. tointeger4(n)
return char(29,extract(n,24,8),extract(n,16,8),extract(n,8,8),extract(n,0,8))
end
end
-- -- not called that often
--
-- local encoder = readers.cffencoder
--
-- todictinteger = function(n)
-- if not n then
-- return encoder[0]
-- elseif n >= -1131 and n <= 1131 then
-- return encoder[n]
-- elseif n >= -32768 and n <= 32767 then
-- -- return int2tag .. tointeger2(n)
-- return char(28,extract(n,8,8),extract(n,0,8))
-- else
-- -- return int4tag .. tointeger4(n)
-- return char(29,extract(n,24,8),extract(n,16,8),extract(n,8,8),extract(n,0,8))
-- end
-- end
todictoffset = function(n)
return int4tag .. tointeger4(n)
end
local e = false
local z = byte("0")
local dp = 10
local ep = 11
local em = 12
local mn = 14
local es = 15
local fg = formatters["%g"]
todictreal = function(v)
local s = fg(v)
local t = { [0] = realtag }
local n = 0
for s in gmatch(s,".") do
if s == "e" or s == "E" then
e = true
elseif s == "+" then
-- skip
elseif s == "-" then
n = n + 1
if e then
t[n] = em
e = false
else
t[n] = mn
end
else
if e then
n = n + 1
t[n] = ep
e = false
end
n = n + 1
if s == "." then
t[n] = dp
else
t[n] = byte(s) - z
end
end
end
n = n + 1
t[n] = es
if (n % 2) ~= 0 then
n = n + 1
t[n] = es
end
local j = 0
for i=1,n,2 do
j = j + 1
t[j] = char(t[i]*0x10+t[i+1])
end
t = concat(t,"",0,j)
return t
end
todictnumber = function(n)
if not n or n == 0 then
return todictinteger(0)
elseif (n > maxnum or n < minnum or (abs(n - round(n)) > epsilon)) then
return todictreal(n)
else
return todictinteger(n)
end
end
end
local todictkey = char
local function todictstring(fontfile,value)
if not value then
value = ""
end
local s = fontfile.cffstrings
local h = fontfile.cffhash
local n = h[value]
if not n then
n = #s + 1
s[n] = value
h[value] = n
end
return todictinteger(390+n)
end
local function todictboolean(b)
return todictinteger(b and 1 or 0)
end
local function todictdeltas(t)
local r = { }
for i=1,#t do
r[i] = todictnumber(t[i]-(t[i-1] or 0))
end
return concat(r)
end
local function todictarray(t)
local r = { }
for i=1,#t do
r[i] = todictnumber(t[i])
end
return concat(r)
end
local function writestring(target,source,offset,what)
target[#target+1] = source
-- report_fonts("string : %-11s %06i # %05i",what,offset,#source)
return offset + #source
end
local function writetable(target,source,offset,what)
source = concat(source)
target[#target+1] = source
-- report_fonts("table : %-11s %06i # %05i",what,offset,#source)
return offset + #source
end
local function writeindex(target,source,offset,what)
local n = #source
local t = #target
t = t + 1 ; target[t] = tocardinal2(n)
if n > 0 then
local data = concat(source)
local size = #data -- assume the worst
local offsetsize, tocardinal
if size < 0xFF then
offsetsize, tocardinal = 1, tocardinal1
elseif size < 0xFFFF then
offsetsize, tocardinal = 2, tocardinal2
elseif size < 0xFFFFFF then
offsetsize, tocardinal = 3, tocardinal3
elseif size < 0xFFFFFFFF then
offsetsize, tocardinal = 4, tocardinal4
end
-- report_fonts("index : %-11s %06i # %05i (%i entries with offset size %i)",what,offset,#data,n,offsetsize)
offset = offset + 2 + 1 + (n + 1) * offsetsize + size
-- bytes per offset
t = t + 1 ; target[t] = tocardinal1(offsetsize)
-- list of offsets (one larger for length calculation)
local offset = 1 -- mandate
t = t + 1 ; target[t] = tocardinal(offset)
for i=1,n do
offset = offset + #source[i]
t = t + 1 ; target[t] = tocardinal(offset)
end
t = t + 1 ; target[t] = data
else
-- report_fonts("index : %-11s %06i # %05i (no entries)",what,offset,0)
offset = offset + 2
end
-- print("offset",offset,#concat(target))
return offset
end
tablewriters.cff = function(fontfile)
--
local streams = fontfile.streams
local cffinfo = streams.cffinfo or { }
local names = streams.names or { }
local fontheader = streams.fontheader or { }
local basefontname = fontfile.basefontname
--
local offset = 0
local dictof = 0
local target = { }
--
local charstrings = fontfile.charstrings
local nofglyphs = #charstrings + 1
local fontmatrix = { 0.001, 0, 0, 0.001, 0, 0 } -- todo
local fontbbox = fontfile.fontbbox
local defaultwidth = cffinfo.defaultwidth or 0
local nominalwidth = cffinfo.nominalwidth or 0
local bluevalues = cffinfo.bluevalues
local otherblues = cffinfo.otherblues
local familyblues = cffinfo.familyblues
local familyotherblues = cffinfo.familyotherblues
local bluescale = cffinfo.bluescale
local blueshift = cffinfo.blueshift
local bluefuzz = cffinfo.bluefuzz
local stdhw = cffinfo.stdhw
local stdvw = cffinfo.stdvw
--
if defaultwidth == 0 then defaultwidth = nil end
if nomimalwidth == 0 then nominalwidth = nil end
if bluevalues then bluevalues = todictarray(bluevalues) end
if otherblues then otherblues = todictarray(otherblues) end
if familyblues then familyblues = todictarray(familyblues) end
if familyotherblues then familyotherblues = todictarray(familyotherblues) end
if bluescale then bluescale = todictnumber(bluescale) end
if blueshift then blueshift = todictnumber(blueshift) end
if bluefuzz then bluefuzz = todictnumber(bluefuzz) end
if stdhw then stdhw = todictdeltas(stdhw) end
if stdvw then stdvw = todictdeltas(stdvw) end
--
local fontversion = todictstring(fontfile,fontheader.fontversion or "uknown version")
local familyname = todictstring(fontfile,cffinfo.familyname or names.family or basefontname)
local fullname = todictstring(fontfile,cffinfo.fullname or basefontname)
local weight = todictstring(fontfile,cffinfo.weight or "Normal")
local fontbbox = todictarray(fontbbox)
local strokewidth = todictnumber(cffinfo.strokewidth)
local monospaced = todictboolean(cffinfo.monospaced)
local italicangle = todictnumber(cffinfo.italicangle)
local underlineposition = todictnumber(cffinfo.underlineposition)
local underlinethickness = todictnumber(cffinfo.underlinethickness)
local charstringtype = todictnumber(2)
local fontmatrix = todictarray(fontmatrix)
local ros = todictstring(fontfile,"Adobe") -- registry
.. todictstring(fontfile,"Identity") -- identity
.. todictnumber(0) -- supplement
local cidcount = todictnumber(fontfile.nofglyphs)
local fontname = todictstring(fontfile,basefontname)
local fdarrayoffset = todictoffset(0)
local fdselectoffset = todictoffset(0)
local charstringoffset = todictoffset(0)
local charsetoffset = todictoffset(0)
local privateoffset = todictoffset(0)
--
local defaultwidthx = todictnumber(defaultwidth)
local nominalwidthx = todictnumber(nominalwidth)
local private = ""
.. (defaultwidthx and (defaultwidthx .. todictkey(20)) or "")
.. (nominalwidthx and (nominalwidthx .. todictkey(21)) or "")
.. (bluevalues and (bluevalues .. todictkey(6)) or "")
.. (otherblues and (otherblues .. todictkey(7)) or "")
.. (familyblues and (familyblues .. todictkey(8)) or "")
.. (familyotherblues and (familyotherblues .. todictkey(9)) or "")
.. (bluescale and (bluescale .. todictkey(12,9)) or "")
.. (blueshift and (blueshift .. todictkey(12,10)) or "")
.. (bluefuzz and (bluefuzz .. todictkey(12,11)) or "")
.. (stdhw and (stdhw .. todictkey(12,12)) or "")
.. (stdvw and (stdvw .. todictkey(12,13)) or "")
local privatesize = todictnumber(#private)
local privatespec = privatesize .. privateoffset
--
-- header (fixed @ 1)
--
local header =
tocardinal1(1) -- major
.. tocardinal1(0) -- minor
.. tocardinal1(4) -- header size
.. tocardinal1(4) -- offset size
--
offset = writestring(target,header,offset,"header")
--
-- name index (fixed @ 2) (has to be sorted)
--
local names = {
basefontname,
}
--
offset = writeindex(target,names,offset,"names")
--
-- topdict index (fixed @ 3)
--
local topvars =
charstringoffset .. todictkey(17)
.. charsetoffset .. todictkey(15)
.. fdarrayoffset .. todictkey(12,36)
.. fdselectoffset .. todictkey(12,37)
.. privatespec .. todictkey(18)
--
local topdict = {
ros .. todictkey(12,30) -- first
.. cidcount .. todictkey(12,34)
.. familyname .. todictkey( 3)
.. fullname .. todictkey( 2)
.. weight .. todictkey( 4)
.. fontbbox .. todictkey( 5)
.. monospaced .. todictkey(12, 1)
.. italicangle .. todictkey(12, 2)
.. underlineposition .. todictkey(12, 3)
.. underlinethickness .. todictkey(12, 4)
.. charstringtype .. todictkey(12, 6)
.. fontmatrix .. todictkey(12, 7)
.. strokewidth .. todictkey(12, 8)
.. topvars
}
--
offset = writeindex(target,topdict,offset,"topdict")
dictof = #target
--
-- string index (fixed @ 4)
--
offset = writeindex(target,fontfile.cffstrings,offset,"strings")
--
-- global subroutine index (fixed @ 5)
--
offset = writeindex(target,{},offset,"globals")
--
-- Encoding (cff1)
--
-- offset = writeindex(target,{},offset,"encoding")
--
-- Charsets
--
charsetoffset = todictoffset(offset)
offset = writetable(target,fontfile.charmappings,offset,"charsets")
--
-- fdselect
--
local fdselect =
tocardinal1(3) -- format
.. tocardinal2(1) -- n of ranges
-- entry 1
.. tocardinal2(0) -- first gid
.. tocardinal1(0) -- fd index
-- entry 2
-- .. tocardinal2(fontfile.sparsemax-1) -- sentinel
.. tocardinal2(fontfile.sparsemax) -- sentinel
--
fdselectoffset = todictoffset(offset)
offset = writestring(target,fdselect,offset,"fdselect")
--
-- charstrings
--
charstringoffset = todictoffset(offset)
offset = writeindex(target,charstrings,offset,"charstrings")
--
-- font dict
--
-- offset = writeindex(target,{},offset,"fontdict")
--
-- private
--
privateoffset = todictoffset(offset)
privatespec = privatesize .. privateoffset
offset = writestring(target,private,offset,"private")
--
local fdarray = {
fontname .. todictkey(12,38)
.. privatespec .. todictkey(18)
}
fdarrayoffset = todictoffset(offset)
offset = writeindex(target,fdarray,offset,"fdarray")
--
topdict = target[dictof]
topdict = sub(topdict,1,#topdict-#topvars)
topvars =
charstringoffset .. todictkey(17)
.. charsetoffset .. todictkey(15)
.. fdarrayoffset .. todictkey(12,36)
.. fdselectoffset .. todictkey(12,37)
.. privatespec .. todictkey(18)
target[dictof] = topdict .. topvars
--
target = concat(target)
-- if trace_detail then
-- local name = "temp.cff"
-- report_fonts("saving %a",name)
-- io.savedata(name,target)
-- inspect(fonts.handlers.otf.readers.cffcheck(name))
-- end
return target
end
end
-- todo: check widths (missing a decimal)
mainwriters["opentype"] = function(details)
--
local fontfile = openfontfile(details)
local basefontname = details.basefontname
local streams = details.streams
local blobs = streams.streams
local fontheader = streams.fontheader
local maximumprofile = streams.maximumprofile
local names = streams.names
local descriptions = details.rawdata.descriptions
local metadata = details.rawdata.metadata
local indices = details.indices
local metabbox = { fontheader.xmin, fontheader.ymin, fontheader.xmax, fontheader.ymax }
local indices,
minindex,
maxindex = collectindices(descriptions,indices)
local streamoffset = 0
local glyphstreams,
charmappings = tablecreators.cff(fontfile)
--
local zero2 = tocardinal2(0)
local zero4 = tocardinal4(0)
--
-- we need to locate notdef (or store its unicode someplace)
--
local blob = blobs[0] or "\14"
local sparsemax = 1
local lastoffset = zero4
glyphstreams[sparsemax] = blob
charmappings[sparsemax] = tocardinal1(0) -- format 0
streamoffset = streamoffset + #blob
lastoffset = tocardinal4(streamoffset)
if minindex == 0 then
minindex = 1
end
for index=minindex,maxindex do
if indices[index] then
local blob = blobs[index] or "\14"
sparsemax = sparsemax + 1
glyphstreams[sparsemax] = blob
charmappings[sparsemax] = tocardinal2(index)
streamoffset = streamoffset + #blob
lastoffset = tocardinal4(streamoffset)
end
end
--
fontfile.nofglyphs = maxindex + 1
fontfile.sparsemax = sparsemax
fontfile.format = "cff"
fontfile.basefontname = basefontname
fontfile.fontbbox = metabbox
--
local fontdata = tablewriters.cff(fontfile)
local fontmeta = makemetadata(fontfile)
--
fontfile = closefontfile(fontfile)
--
local units = fontheader.units or metadata.units
local basefont = pdfconstant(basefontname)
local widths = widtharray(details,indices,maxindex,units)
local object = details.objectnumber
local tounicode = tounicodedictionary(details,indices,maxindex,basefontname)
local tocidset = tocidsetdictionary(indices,minindex,maxindex)
local fontbbox = pdfarray { unpack(metabbox) }
local ascender = metadata.ascender or 0
local descender = metadata.descender or 0
local capheight = metadata.capheight or fontbbox[4]
local stemv = metadata.weightclass
local italicangle = metadata.italicangle
local xheight = metadata.xheight or fontbbox[4]
if stemv then
stemv = (stemv/65)^2 + 50
else
-- stemv = 2
end
--
local function scale(n)
if n then
return round((n) * 10000 / units) / 10
else
return 0
end
end
--
local reserved = pdfreserveobject()
local child = pdfdictionary {
Type = pdfconstant("Font"),
Subtype = pdfconstant("CIDFontType0"),
BaseFont = basefont,
FontDescriptor = pdfreference(reserved),
W = pdfreference(pdfflushobject(widths)),
CIDSystemInfo = pdfdictionary {
Registry = pdfstring("Adobe"),
Ordering = pdfstring("Identity"),
Supplement = 0,
}
}
local descendants = pdfarray {
pdfreference(pdfflushobject(child)),
}
local fontstream = pdfdictionary {
Subtype = pdfconstant("CIDFontType0C"),
}
local descriptor = pdfdictionary {
Type = pdfconstant("FontDescriptor"),
FontName = basefont,
Flags = 4,
FontBBox = fontbbox,
Ascent = scale(ascender),
Descent = scale(descender),
ItalicAngle = round(italicangle or 0),
CapHeight = scale(capheight),
StemV = scale(stemv),
XHeight = scale(xheight),
CIDSet = tocidset,
FontFile3 = pdfreference(pdfflushstreamobject(fontdata,fontstream())),
Metadata = fontmeta and pdfreference(pdfflushstreamobject(fontmeta)) or nil,
}
local parent = pdfdictionary {
Type = pdfconstant("Font"),
Subtype = pdfconstant("Type0"),
Encoding = pdfconstant(details.properties.writingmode == "vertical" and "Identity-V" or "Identity-H"),
BaseFont = basefont,
DescendantFonts = descendants,
ToUnicode = pdfreference(pdfflushstreamobject(tounicode)),
}
pdfflushobject(reserved,descriptor)
pdfflushobject(object,parent)
end
mainwriters["type1"] = function(details)
local s = details.streams
local m = details.rawdata.metadata
if m then
local h = s.horizontalheader
local c = s.cffinfo
local n = s.names
h.ascender = m.ascender or h.ascender
h.descender = m.descender or h.descender
n.copyright = m.copyright or n.copyright
n.family = m.familyname or n.familyname
n.fullname = m.fullname or n.fullname
n.fontname = m.fontname or n.fontname
n.subfamily = m.subfamilyname or n.subfamilyname
n.version = m.version or n.version
setmetatableindex(h,m)
setmetatableindex(c,m)
setmetatableindex(n,m)
end
mainwriters["opentype"](details)
end
-- todo: map pdf glyphs onto companion type 3 font .. can be set of small
-- ones. maybe only private codes with proper tounicode
local methods = { }
function methods.pk(filename)
local resolution = 600
local widthfactor = resolution / 72
local scalefactor = 72 / resolution / 10
local pkfullname = resolvers.findpk(basedfontname,resolution)
if not pkfullname or pkfullname == "" then
return
end
local readers = fonts.handlers.tfm.readers
local result = readers.loadpk(pkfullname)
if not result or result.error then
return
end
return result.glyphs, widthfactor / 65536, scalefactor, readers.pktopdf
end
mainwriters["type3"] = function(details)
local properties = details.properties
local basefontname = details.basefontname or properties.name
local askedmethod = "pk"
local method = methods[askedmethod]
if not method then
return
end
local glyphs, widthfactor, scalefactor, glyphtopdf = method(basedfontname)
if not glyphs then
return
end
local parameters = details.parameters
local object = details.objectnumber
local factor = parameters.factor -- normally 1
local f_name = formatters["I%05i"]
local fontmatrix = pdfarray { scalefactor, 0, 0, scalefactor, 0, 0 }
local indices,
minindex,
maxindex = collectindices(details.fontdata.characters,details.indices)
local widths = pdfarray()
local differences = pdfarray()
local charprocs = pdfdictionary()
local basefont = pdfconstant(basefontname)
local llx, lly, urx, ury = 0, 0, 0, 0
for i=1,maxindex-minindex+1 do
widths[i] = 0
end
local d = 0
local lastindex = -0xFFFF
for index, data in sortedhash(indices) do
local name = f_name(index)
local glyph = glyphs[index]
if glyph then
local width = widthfactor * data.width
local stream, lx, ly, ux, uy = glyphtopdf(glyph,width)
if stream then
if index - 1 ~= lastindex then
d = d + 1 ; differences[d] = index
end
lastindex = index
d = d + 1 ; differences[d] = pdfconstant(name)
charprocs[name] = pdfreference(pdfflushstreamobject(stream))
widths[index-minindex+1] = width
if lx < llx then llx = lx end
if ux > urx then urx = ux end
if ly < lly then lly = ly end
if uy > ury then ury = uy end
end
end
end
local fontbbox = pdfarray { llx, lly, urx, ury }
local encoding = pdfdictionary {
Type = pdfconstant("Encoding"),
Differences = differences,
}
local tounicode = tounicodedictionary(details,indices,maxindex,basefontname)
local descriptor = pdfdictionary {
Type = pdfconstant("FontDescriptor"),
FontName = basefont,
Flags = 4,
FontBBox = fontbbox,
-- Ascent = scale(ascender),
-- Descent = scale(descender),
-- ItalicAngle = round(italicangle or 0),
-- CapHeight = scale(capheight),
-- StemV = scale(stemv),
-- XHeight = scale(xheight),
-- Metadata = fontmeta and pdfreference(pdfflushstreamobject(fontmeta)) or nil,
}
local parent = pdfdictionary {
Type = pdfconstant("Font"),
Subtype = pdfconstant("Type3"),
Name = basefont,
FontBBox = fontbbox,
FontMatrix = fontmatrix,
CharProcs = pdfreference(pdfflushobject(charprocs)),
Encoding = pdfreference(pdfflushobject(encoding)),
FirstChar = minindex,
LastChar = maxindex,
Widths = pdfreference(pdfflushobject(widths)),
FontDescriptor = pdfreference(pdfflushobject(descriptor)),
Resources = lpdf.procset(true),
ToUnicode = pdfreference(pdfflushstreamobject(tounicode)),
}
pdfflushobject(reserved,descriptor)
pdfflushobject(object,parent)
end
end
-- writingmode
local usedfonts = fonts.hashes.identifiers -- for now
local noffonts = 0
-- The main injector.
-- here we need to test for sharing otherwise we reserve too many
-- objects
local getstreamhash = fonts.handlers.otf.getstreamhash
local loadstreamdata = fonts.handlers.otf.loadstreamdata
-- we can actually now number upwards (so not use fontid in /F)
local objects = setmetatableindex(function(t,k)
local v
if type(k) == "number" then
local h = getstreamhash(k)
v = rawget(t,h)
if not v then
v = pdfreserveobject()
t[h] = v
end
if trace_fonts then
report_fonts("font id %i bound to hash %s and object %i",k,h,v)
end
else
report_fonts("fatal error, hash %s asked but not used",k,h,v)
v = pdfreserveobject()
t[k] = v
end
return v
end)
local n = 0
local names = setmetatableindex(function(t,k)
local v
if type(k) == "number" then
local h = getstreamhash(k)
v = rawget(t,h)
if not v then
n = n + 1
v = n
t[h] = v
end
if trace_fonts then
report_fonts("font id %i bound to hash %s and name %i",k,h,n)
end
end
t[k] = v
return v
end)
function lpdf.flushfonts()
local mainfonts = { }
statistics.starttiming(objects)
for fontid, used in sortedhash(lpdf.usedcharacters) do
-- for a bitmap we need a different hash unless we stick to a fixed high
-- resolution which makes much sense
local hash = getstreamhash(fontid)
if hash then
local parent = mainfonts[hash]
if not parent then
local fontdata = usedfonts[fontid]
local rawdata = fontdata.shared and fontdata.shared.rawdata
local resources = fontdata.resources
local properties = fontdata.properties -- writingmode and type3
local parameters = fontdata.parameters -- used in type3
if not rawdata then
-- we have a virtual font that loaded directly ... at some point i will
-- sort this out (in readanddefine we need to do a bit more) .. the problem
-- is that we have a hybrid font then
for xfontid, xfontdata in next, fonts.hashes.identifiers do
if fontid ~= xfontid then
local xhash = getstreamhash(xfontid)
if hash == xhash then
rawdata = xfontdata.shared and xfontdata.shared.rawdata
if rawdata then
resources = xfontdata.resources
properties = xfontdata.properties
parameters = xfontdata.parameters
break
end
end
end
end
end
if rawdata then
parent = {
hash = hash,
fontdata = fontdata,
filename = resources.filename or properties.filename or "unset",
indices = { },
rawdata = rawdata,
properties = properties, -- we assume consistency
parameters = parameters, -- we assume consistency
streams = { },
objectnumber = objects[hash],
basefontname = subsetname(properties.psname or properties.name or "unset"),
name = names[hash],
}
mainfonts[hash] = parent
noffonts = noffonts + 1
end
end
if parent then
local indices = parent.indices
for k in next, used do
indices[k] = true
end
end
end
end
for hash, details in sortedhash(mainfonts) do
if next(details.indices) then
local filename = details.filename
if trace_fonts then
report_fonts("embedding %a hashed as %a",filename,hash)
end
local properties = details.properties
local bitmap = properties.usedbitmap
if bitmap then
local format = "type3"
local writer = mainwriters[format]
if writer then
if trace_fonts then
report_fonts("using main writer %a",format)
end
writer(details)
end
else
local format = properties.format
local writer = mainwriters[format]
if not writer then
-- at some point we should do this in the frontend but
-- luatex does it anyway then
local encoding, pfbfile, encfile = getmapentry(filename)
if encoding and pfbfile then
filename = pfbfile
format = "type1"
--
-- another (temp) hack
local size = details.fontdata.parameters.size
local factor = details.fontdata.parameters.factor
local descriptions = { }
local characters = details.fontdata.characters
--
local names, _, _, metadata = fonts.constructors.handlers.pfb.loadvector(pfbfile)
local reverse = table.swapped(names)
local vector = encoding.vector
local indices = details.indices
local remapped = { }
local factor = number.dimenfactors.bp * size / 65536
for k, v in next, indices do
local name = vector[k]
local index = reverse[name] or 0
local width = factor * (characters[k].width or 0)
descriptions[k] = {
width = width,
index = index,
name = name,
}
remapped[index] = true
end
details.indices = remapped
--
details.rawdata.descriptions = descriptions
details.filename = filename
details.rawdata.metadata = { }
--
properties.filename = filename
properties.format = format
writer = mainwriters[format]
end
end
if writer then
if trace_fonts then
report_fonts("using main writer %a",format)
end
-- better move this test to the writers .. cleaner
local streams = loadstreamdata(details.fontdata)
if streams and streams.fontheader and streams.names then
details.streams = streams
writer(details)
details.streams = { }
elseif trace_fonts then
-- can be ok for e.g. emoji
report_fonts("no streams in %a",filename)
end
-- free some memory
else -- if trace_fonts then
report_fonts("no %a writer for %a",format,filename)
end
end
end
mainfonts[details.hash] = false -- done
end
statistics.stoptiming(objects)
end
statistics.register("font embedding time",function()
if noffonts > 0 then
return format("%s seconds, %s fonts", statistics.elapsedtime(objects),noffonts)
end
end)
updaters.register("backend.update.pdf",function()
fonts.constructors.addtounicode = false
end)
-- this is temporary
local done = false
updaters.register("backend.update.pdf",function()
if not done then
function pdf.getfontobjnum (k) return objects[k] end
function pdf.getfontname (k) return names [k] end
function pdf.includechar () end -- maybe, when we need it
function pdf.includefont () end -- maybe, when we need it
function pdf.includecharlist () end -- maybe, when we need it
function pdf.setomitcidset (v) includecidset = not v end
function pdf.setomitcharset () end -- we don't need that in lmtx
function pdf.setsuppressoptionalinfo() end -- we don't need that in lmtx
function pdf.mapfile (n) loadmapfile(n) end
function pdf.mapline (n) loadmapline(n) end
-- this will change
lpdf.registerdocumentfinalizer(lpdf.flushfonts,1,"wrapping up fonts")
done = true
end
end)
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