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|
if not modules then modules = { } end modules ['font-ocm'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
if not context then
return
elseif CONTEXTLMTXMODE and CONTEXTLMTXMODE > 0 then
return
else
-- Maybe I'll also make a generic variant but for now I just test this in
-- MkIV. After all, color fonts are not that much used (and generic is for
-- serious looking articles and books and not for fancy documents using
-- emoji.) Below is a quick and dirty implementation. Also, it looks like
-- these features were never used outside context anyway (in spite of being
-- in generic).
end
local tostring, tonumber, next = tostring, tonumber, next
local round, max = math.round, math.round
local sortedkeys, sortedhash, concat = table.sortedkeys, table.sortedhash, table.concat
local setmetatableindex = table.setmetatableindex
local formatters = string.formatters
local otf = fonts.handlers.otf
local otfregister = otf.features.register
local bpfactor = number.dimenfactors.bp
local typethree = { }
callback.register("provide_charproc_data",function(action,f,...)
local registered = typethree[f]
if registered then
return registered(action,f,...)
else
return 0, 0 -- this will also disable further calls
end
end)
local defaults = {
function() return 0, 0 end,
function() return 0, 0 end,
function() return 0.001, "" end,
}
local function registeractions(t)
return {
t.preroll or defaults[1],
t.collect or defaults[2],
t.wrapup or defaults[3],
}
end
local function registertypethreeresource(specification,n,o)
specification.usedobjects["X"..n] = lpdf.reference(o)
end
local function registertypethreefont(specification,n,o)
specification.usedfonts["F"..n] = lpdf.reference(o)
end
local function typethreeresources(specification)
local usedobjects = specification.usedobjects
local usedfonts = specification.usedfonts
local resources = { }
if next(usedobjects) then
resources[#resources+1] = "/XObject << " .. usedobjects() .. " >>"
end
if next(usedfonts) then
resources[#resources+1] = "/Font << " .. usedfonts() .. " >>"
end
-- resources[#resources+1] = lpdf.collectedresources()
specification.usedfonts = nil
specification.usedobjects = nil
return concat(resources, " ")
end
local function registerfont(specification,actions)
specification.usedfonts = lpdf.dictionary()
specification.usedobjects = lpdf.dictionary()
typethree[specification.id] = function(action,f,c)
return actions[action](specification,f,c)
end
end
fonts.handlers.typethree = {
register = function(id,handler)
-- needed for manual
if not typethree[id] then
logs.report("fonts","low level Type3 handler registered for font with id %i",id)
typethree[id] = handler
end
end
}
local initializeoverlay do
local f_color = formatters["%.3f %.3f %.3f rg"]
local f_gray = formatters["%.3f g"]
local sharedpalettes = { }
local colors = attributes.list[attributes.private('color')] or { }
local transparencies = attributes.list[attributes.private('transparency')] or { }
function otf.registerpalette(name,values)
sharedpalettes[name] = values
local color = lpdf.color
local transparency = lpdf.transparency
local register = colors.register
for i=1,#values do
local v = values[i]
if v == "textcolor" then
values[i] = false
else
local c = nil
local t = nil
if type(v) == "table" then
c = register(name,"rgb",
max(round((v.r or 0)*255),255)/255,
max(round((v.g or 0)*255),255)/255,
max(round((v.b or 0)*255),255)/255
)
else
c = colors[v]
t = transparencies[v]
end
if c and t then
values[i] = color(1,c) .. " " .. transparency(t)
elseif c then
values[i] = color(1,c)
elseif t then
values[i] = color(1,t)
end
end
end
end
local function convert(t,k)
local v = { }
for i=1,#k do
local p = k[i]
local r, g, b = p[1], p[2], p[3]
if r == g and g == b then
v[i] = f_gray(r/255)
else
v[i] = f_color(r/255,g/255,b/255)
end
end
t[k] = v
return v
end
-- This is by no means watertight (the id mess) especially because we
-- don't know it yet. Instead we can just assemble here and avoid the
-- box approach. I might do that (so then we need to pass fonts and
-- extra resource entries.
local f_stream = formatters["%s 0 d0 %s 0 0 %s 0 %s cm /X%i Do"]
local fontorder = 0
local actions = registeractions {
preroll = function(specification,f,c)
local data = specification.delegated[c]
local colorlist = data.colorlist
local colorvalues = specification.colorvalues
local default = specification.default
local mainid = specification.mainid
local t = { "\\typethreefont{", mainid, "}" }
local n = 3
local l = nil
local m = #colorlist
for i=1,m do
local entry = colorlist[i]
local v = colorvalues[entry.class] or default
if v and l ~= v then
n = n + 1 ; t[n] = "\\typethreecode{"
n = n + 1 ; t[n] = v
n = n + 1 ; t[n] = "}"
l = v
end
if i < m then
n = n + 1 ; t[n] = "\\typethreechar{"
else
n = n + 1 ; t[n] = "\\typethreelast{"
end
n = n + 1 ; t[n] = entry.slot
n = n + 1 ; t[n] = "}"
end
token.set_macro("typethreemacro",concat(t))
tex.runlocal("typethreetoks")
registertypethreeresource(specification,c,tex.saveboxresource(0,nil,lpdf.collectedresources(),true))
-- registertypethreefont(specification,mainid,lpdf.reference(lpdf.getfontobjnumber(mainid)))
return 0, 0
end,
collect = function(specification,f,c)
local parameters = specification.parameters
local data = specification.delegated[c]
local factor = parameters.hfactor
local units = parameters.units
local width = (data.width or 0) / factor
local scale = 100
local factor = units * bpfactor -- / scale
local depth = (data.depth or 0)*factor
local shift = - depth / (10*units/1000)
local object = pdf.immediateobj("stream",f_stream(width,scale,scale,shift,c))
return object, width
end,
wrapup = function(specification,f)
return 0.001, typethreeresources(specification)
end,
}
local function register(specification)
registerfont(specification,actions)
end
initializeoverlay = function(tfmdata,kind,value)
if value then
local resources = tfmdata.resources
local palettes = resources.colorpalettes
if palettes then
local converted = resources.converted
if not converted then
converted = setmetatableindex(convert)
resources.converted = converted
end
local colorvalues = sharedpalettes[value]
local default = false -- so the text color (bad for icon overloads)
if colorvalues then
default = colorvalues[#colorvalues]
else
colorvalues = converted[palettes[tonumber(value) or 1] or palettes[1]] or { }
end
local classes = #colorvalues
if classes == 0 then
return
end
--
local characters = tfmdata.characters
local descriptions = tfmdata.descriptions
local properties = tfmdata.properties
local parameters = tfmdata.parameters
--
properties.virtualized = true
--
local delegated = { }
local index = 0
local fonts = tfmdata.fonts or { }
local fontindex = #fonts + 1
tfmdata.fonts = fonts
local function flush()
if index > 0 then
fontorder = fontorder + 1
local f = {
characters = delegated,
parameters = parameters,
tounicode = true,
format = "type3",
name = "InternalTypeThreeFont" , -- .. fontorder,
psname = "none",
}
fonts[fontindex] = {
id = font.define(f),
delegated = delegated,
parameters = parameters,
colorvalues = colorvalues,
default = default,
}
end
fontindex = fontindex + 1
index = 0
delegated = { }
end
for unicode, character in sortedhash(characters) do
local description = descriptions[unicode]
if description then
local colorlist = description.colors
if colorlist then
if index == 255 then
flush()
end
index = index + 1
delegated[index] = {
width = character.width,
height = character.height,
depth = character.depth,
tounicode = character.tounicode,
colorlist = colorlist,
}
character.commands = {
{ "slot", fontindex, index },
}
end
end
end
flush()
local mainid = font.nextid()
for i=1,#fonts do
local f = fonts[i]
if f.delegated then
f.mainid = mainid
register(f)
end
end
return true
end
end
end
otfregister {
name = "colr",
description = "color glyphs",
manipulators = {
base = initializeoverlay,
node = initializeoverlay,
}
}
end
do
local nofstreams = 0
local f_name = formatters[ [[pdf-glyph-%05i]] ]
local f_used = context and formatters[ [[original:///%s]] ] or formatters[ [[%s]] ]
local hashed = { }
local cache = { }
local openpdf = pdfe.new
function otf.storepdfdata(pdf)
if pdf then
local done = hashed[pdf]
if not done then
nofstreams = nofstreams + 1
local f = f_name(nofstreams)
local n = openpdf(pdf,#pdf,f)
done = f_used(n)
hashed[pdf] = done
end
return done
end
end
end
local pdftovirtual do
local f_stream = formatters["%s 0 d0 %s 0 0 %s %s %s cm /X%i Do"]
local fontorder = 0
local shared = { }
local actions = registeractions {
preroll = function(specification,f,c)
return 0, 0
end,
collect = function(specification,f,c)
local parameters = specification.parameters
local data = specification.delegated[c]
local desdata = data.desdata
local pdfdata = data.pdfdata
local width = desdata.width or 0
local height = desdata.height or 0
local depth = desdata.depth or 0
local factor = parameters.hfactor
local units = parameters.units
local typ = type(pdfdata)
local dx = 0
local dy = 0
local scale = 1
if typ == "table" then
data = pdfdata.data
dx = pdfdata.x or pdfdata.dx or 0
dy = pdfdata.y or pdfdata.dy or 0
scale = pdfdata.scale or 1
elseif typ == "string" then
data = pdfdata
dx = 0
dy = 0
else
return 0, 0
end
if not data then
return 0, 0
end
local name = otf.storepdfdata(data)
local xform = shared[name]
if not xform then
xform = images.embed(images.create { filename = name })
shared[name] = xform
end
registertypethreeresource(specification,c,xform.objnum)
scale = scale * (width / (xform.width * bpfactor))
dy = - depth + dy
-- png .. no time to figure it out now
-- dx = 0
-- dy = 0
local object = pdf.immediateobj("stream",f_stream(width,scale,scale,dx,dy,c)), width
return object, width
end,
wrapup = function(specification,f)
return 1/specification.parameters.units, typethreeresources(specification)
end,
}
local function register(specification)
registerfont(specification,actions)
end
pdftovirtual = function(tfmdata,pdfshapes,kind) -- kind = png|svg
if not tfmdata or not pdfshapes or not kind then
return
end
--
local characters = tfmdata.characters
local descriptions = tfmdata.descriptions
local properties = tfmdata.properties
local parameters = tfmdata.parameters
local hfactor = parameters.hfactor
--
properties.virtualized = true
--
local storepdfdata = otf.storepdfdata
--
local delegated = { }
local index = 0
local fonts = tfmdata.fonts or { }
local fontindex = #fonts + 1
tfmdata.fonts = fonts
local function flush()
if index > 0 then
fontorder = fontorder + 1
local f = {
characters = delegated,
parameters = parameters,
tounicode = true,
format = "type3",
name = "InternalTypeThreeFont" .. fontorder,
psname = "none",
size = parameters.size,
}
fonts[fontindex] = {
id = font.define(f),
delegated = delegated,
parameters = parameters,
}
end
fontindex = fontindex + 1
index = 0
delegated = { }
end
for unicode, character in sortedhash(characters) do
local idx = character.index
if idx then
local pdfdata = pdfshapes[idx]
local description = descriptions[unicode]
if pdfdata and description then
if index == 255 then
flush()
end
index = index + 1
delegated[index] = {
desdata = description,
width = character.width,
height = character.width,
depth = character.width,
tounicode = character.tounicode,
pdfdata = pdfdata,
}
character.commands = {
{ "slot", fontindex, index },
}
end
end
end
--
flush()
local mainid = font.nextid()
for i=1,#fonts do
local f = fonts[i]
if f.delegated then
f.mainid = mainid
register(f)
end
end
--
end
end
local initializesvg do
local otfsvg = otf.svg or { }
otf.svg = otfsvg
otf.svgenabled = true
local report_svg = logs.reporter("fonts","svg conversion")
local loaddata = io.loaddata
local savedata = io.savedata
local remove = os.remove
local xmlconvert = xml.convert
local xmlfirst = xml.first
function otfsvg.filterglyph(entry,index)
local d = entry.data
if gzip.compressed(d) then
d = gzip.decompress(d) or d
end
local svg = xmlconvert(d)
local root = svg and xmlfirst(svg,"/svg[@id='glyph"..index.."']")
local data = root and tostring(root)
return data
end
local runner = sandbox and sandbox.registerrunner {
name = "otfsvg",
program = "inkscape",
method = "pipeto",
template = "--export-area-drawing --shell > temp-otf-svg-shape.log",
reporter = report_svg,
}
if not runner then
--
-- poor mans variant for generic:
--
runner = function()
return io.popen("inkscape --export-area-drawing --shell > temp-otf-svg-shape.log","w")
end
end
-- There are svg out there with bad viewBox specifications where shapes lay outside that area,
-- but trying to correct that didn't work out well enough so I discarded that code. BTW, we
-- decouple the inskape run and the loading run because inkscape is working in the background
-- in the files so we need to have unique files.
--
-- Because a generic setup can be flawed we need to catch bad inkscape runs which add a bit of
-- ugly overhead. Bah.
--
-- In the long run this method is a dead end because we cannot rely on command line arguments
-- etc to be upward compatible (so no real batch tool).
local new = nil
local function inkscapeformat(suffix)
if new == nil then
new = os.resultof("inkscape --version") or ""
new = new == "" or not find(new,"Inkscape%s*0")
end
return new and "filename" or suffix
end
function otfsvg.topdf(svgshapes,tfmdata)
local pdfshapes = { }
local inkscape = runner()
if inkscape then
-- local indices = fonts.getindices(tfmdata)
local descriptions = tfmdata.descriptions
local nofshapes = #svgshapes
local s_format = inkscapeformat("pdf") -- hack, this will go away when is >= 0 is everywhere
local f_svgfile = formatters["temp-otf-svg-shape-%i.svg"]
local f_pdffile = formatters["temp-otf-svg-shape-%i.pdf"]
local f_convert = formatters[new and "file-open:%s; export-%s:%s; export-do\n" or "%s --export-%s=%s\n"]
local filterglyph = otfsvg.filterglyph
local nofdone = 0
local processed = { }
report_svg("processing %i svg containers",nofshapes)
statistics.starttiming()
for i=1,nofshapes do
local entry = svgshapes[i]
for index=entry.first,entry.last do
local data = filterglyph(entry,index)
if data and data ~= "" then
local svgfile = f_svgfile(index)
local pdffile = f_pdffile(index)
savedata(svgfile,data)
inkscape:write(f_convert(svgfile,s_format,pdffile))
processed[index] = true
nofdone = nofdone + 1
if nofdone % 25 == 0 then
report_svg("%i shapes submitted",nofdone)
end
end
end
end
if nofdone % 25 ~= 0 then
report_svg("%i shapes submitted",nofdone)
end
report_svg("processing can be going on for a while")
inkscape:write("quit\n")
inkscape:close()
report_svg("processing %i pdf results",nofshapes)
for index in next, processed do
local svgfile = f_svgfile(index)
local pdffile = f_pdffile(index)
-- local fntdata = descriptions[indices[index]]
-- local bounds = fntdata and fntdata.boundingbox
local pdfdata = loaddata(pdffile)
if pdfdata and pdfdata ~= "" then
pdfshapes[index] = {
data = pdfdata,
-- x = bounds and bounds[1] or 0,
-- y = bounds and bounds[2] or 0,
}
end
remove(svgfile)
remove(pdffile)
end
local characters = tfmdata.characters
for k, v in next, characters do
local d = descriptions[k]
local i = d.index
if i then
local p = pdfshapes[i]
if p then
local w = d.width
local l = d.boundingbox[1]
local r = d.boundingbox[3]
p.scale = (r - l) / w
p.x = l
end
end
end
if not next(pdfshapes) then
report_svg("there are no converted shapes, fix your setup")
end
statistics.stoptiming()
if statistics.elapsedseconds then
report_svg("svg conversion time %s",statistics.elapsedseconds() or "-")
end
end
return pdfshapes
end
initializesvg = function(tfmdata,kind,value) -- hm, always value
if value and otf.svgenabled then
local svg = tfmdata.properties.svg
local hash = svg and svg.hash
local timestamp = svg and svg.timestamp
if not hash then
return
end
local pdffile = containers.read(otf.pdfcache,hash)
local pdfshapes = pdffile and pdffile.pdfshapes
if not pdfshapes or pdffile.timestamp ~= timestamp or not next(pdfshapes) then
-- the next test tries to catch errors in generic usage but of course can result
-- in running again and again
local svgfile = containers.read(otf.svgcache,hash)
local svgshapes = svgfile and svgfile.svgshapes
pdfshapes = svgshapes and otfsvg.topdf(svgshapes,tfmdata,otf.pdfcache.writable,hash) or { }
containers.write(otf.pdfcache, hash, {
pdfshapes = pdfshapes,
timestamp = timestamp,
})
end
pdftovirtual(tfmdata,pdfshapes,"svg")
return true
end
end
otfregister {
name = "svg",
description = "svg glyphs",
manipulators = {
base = initializesvg,
node = initializesvg,
}
}
end
-- This can be done differently e.g. with ffi and gm and we can share code anway. Using
-- batchmode in gm is not faster and as it accumulates we would need to flush all
-- individual shapes. But ... in context lmtx (and maybe the backport) we will use
-- a different and more efficient method anyway. I'm still wondering if I should
-- keep color code in generic. Maybe it should be optional.
local initializepng do
-- Alternatively we can create a single pdf file with -adjoin and then pick up pages from
-- that file but creating thousands of small files is no fun either.
local otfpng = otf.png or { }
otf.png = otfpng
otf.pngenabled = true
local report_png = logs.reporter("fonts","png conversion")
local loaddata = io.loaddata
local savedata = io.savedata
local remove = os.remove
local texhack = [[\startTEXpage\externalfigure[temp-otf-png-shape.png]\stopTEXpage]]
local runner = false
local method = "gm"
local function initialize(v)
if v == "lmtx" then
report_png("using lmtx converter, slow but okay")
runner = sandbox.registerrunner {
-- reporter = report_png,
name = "otfpng",
program = "mtxrun --script context",
template = "--once --batch --silent temp-otf-png-shape.tex > temp-otf-svg-shape.log",
}
method = v
elseif v == "mutool" then
report_png("using lmtx converter, no mask, black background")
runner = sandbox.registerrunner {
-- reporter = report_png,
name = "otfpng",
program = "mutool",
template = "convert -o temp-otf-png-shape.pdf temp-otf-png-shape.png",
}
method = v
else
report_png("using lmtx converter, no mask, white background")
runner = sandbox.registerrunner {
-- reporter = report_png,
name = "otfpng",
program = "gm",
template = "convert -quality 100 temp-otf-png-shape.png temp-otf-png-shape.pdf > temp-otf-svg-shape.log",
}
method = "gm"
end
return runner
end
directives.register("backend.otfpng.method",initialize)
local files = utilities.files
local openfile = files.open
local closefile = files.close
local setposition = files.setposition
local readstring = files.readstring
function otfpng.topdf(pngshapes,filename)
if pngshapes and filename then
local pdfshapes = { }
local pngfile = "temp-otf-png-shape.png"
local pdffile = "temp-otf-png-shape.pdf"
local logfile = "temp-otf-png-shape.log"
local texfile = "temp-otf-png-shape.tex"
local tucfile = "temp-otf-png-shape.tuc"
local nofdone = 0
local indices = sortedkeys(pngshapes) -- can be sparse
local nofindices = #indices
report_png("processing %i png containers",nofindices)
statistics.starttiming()
local filehandle = openfile(filename)
savedata(texfile,texhack) -- not always used but who cares
if not runner then
initialize()
end
for i=1,nofindices do
local index = indices[i]
local entry = pngshapes[index]
-- local data = entry.data -- or placeholder
local offset = entry.o
local size = entry.s
local x = entry.x
local y = entry.y
local data = nil
if offset and size then
setposition(filehandle,offset)
data = readstring(filehandle,size)
savedata(pngfile,data)
runner()
data = loaddata(pdffile)
end
pdfshapes[index] = {
-- x = x ~= 0 and x or nil,
-- y = y ~= 0 and y or nil,
data = data,
}
nofdone = nofdone + 1
if nofdone % 100 == 0 then
report_png("%i shapes processed",nofdone)
end
end
closefile(filehandle)
report_png("processing %i pdf results",nofindices)
remove(pngfile)
remove(pdffile)
remove(logfile)
remove(texfile)
remove(tucfile)
statistics.stoptiming()
if statistics.elapsedseconds then
report_png("png conversion time %s",statistics.elapsedseconds() or "-")
end
return pdfshapes
end
end
initializepng = function(tfmdata,kind,value) -- hm, always value
if value and otf.pngenabled then
local png = tfmdata.properties.png
local hash = png and png.hash
local timestamp = png and png.timestamp
if not hash then
return
end
local pdffile = containers.read(otf.pdfcache,hash)
local pdfshapes = pdffile and pdffile.pdfshapes
if not pdfshapes or pdffile.timestamp ~= timestamp or pdffile.timestamp ~= method then
local pngfile = containers.read(otf.pngcache,hash)
local filename = tfmdata.resources.filename
local pngshapes = pngfile and pngfile.pngshapes
pdfshapes = pngshapes and otfpng.topdf(pngshapes,filename) or { }
containers.write(otf.pdfcache, hash, {
pdfshapes = pdfshapes,
timestamp = timestamp,
method = method,
})
end
--
pdftovirtual(tfmdata,pdfshapes,"png")
return true
end
end
otfregister {
name = "sbix",
description = "sbix glyphs",
manipulators = {
base = initializepng,
node = initializepng,
}
}
otfregister {
name = "cblc",
description = "cblc glyphs",
manipulators = {
base = initializepng,
node = initializepng,
}
}
end
do
local function initializecolor(tfmdata,kind,value)
if value == "auto" then
return
initializeoverlay(tfmdata,kind,value) or
initializesvg (tfmdata,kind,value) or
initializepng (tfmdata,kind,value)
elseif value == "overlay" then
return initializeoverlay(tfmdata,kind,value)
elseif value == "svg" then
return initializesvg(tfmdata,kind,value)
elseif value == "png" or value == "bitmap" then
return initializepng(tfmdata,kind,value)
else
-- forget about it
end
end
otfregister {
name = "color",
description = "color glyphs",
manipulators = {
base = initializecolor,
node = initializecolor,
}
}
end
-- Old stuff:
do
local startactualtext = nil
local stopactualtext = nil
function otf.getactualtext(s)
if not startactualtext then
startactualtext = backends.codeinjections.startunicodetoactualtextdirect
stopactualtext = backends.codeinjections.stopunicodetoactualtextdirect
end
return startactualtext(s), stopactualtext()
end
end
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