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if not modules then modules = { } end modules ['meta-fnt'] = {
version = 1.001,
comment = "companion to meta-fnt.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local concat = table.concat
local format = string.format
local formatters = string.formatters
local chardata = characters.data
local fontdata = fonts.hashes.identifiers
local vffonts = fonts.handlers.vf
local mpfonts = fonts.mp or { }
fonts.mp = mpfonts
mpfonts.version = mpfonts.version or 1.20
mpfonts.inline = true
mpfonts.cache = containers.define("fonts", "mp", mpfonts.version, true)
metapost.fonts = metapost.fonts or { }
-- a few glocals
local characters, descriptions = { }, { }
local factor, code, slot, width, height, depth, total, variants, bbox, llx, lly, urx, ury = 100, { }, 0, 0, 0, 0, 0, 0, true, 0, 0, 0, 0
-- The next variant of ActualText is what Taco and I could come up with
-- eventually. As of September 2013 Acrobat copies okay, Sumatra copies a
-- question mark, pdftotext injects an extra space and Okular adds a
-- newline plus space.
-- return formatters["BT /Span << /ActualText (CONTEXT) >> BDC [<feff>] TJ % t EMC ET"](code)
local function topdf(n,code)
if n < 0x10000 then
return formatters["BT /Span << /ActualText <feff%04x> >> BDC [<feff>] TJ % t EMC ET"](n,code)
else
return formatters["BT /Span << /ActualText <feff%04x%04x> >> BDC [<feff>] TJ % t EMC ET"](n/1024+0xD800,n%1024+0xDC00,code)
end
end
-- local function topdf(n,code)
-- return formatters["/Span << /ActualText (CTX) >> BDC % t EMC"](code)
-- end
local flusher = {
startfigure = function(_chr_,_llx_,_lly_,_urx_,_ury_)
code = { }
slot = _chr_
llx = _llx_
lly = _lly_
urx = _urx_
ury = _ury_
width = urx - llx
height = ury
depth = -lly
total = total + 1
inline = mpfonts.inline
end,
flushfigure = function(t)
for i=1,#t do
code[#code+1] = t[i]
end
end,
stopfigure = function()
local cd = chardata[n]
descriptions[slot] = {
-- unicode = slot,
name = cd and cd.adobename,
width = width * 100,
height = height * 100,
depth = depth * 100,
boundingbox = { llx, lly, urx, ury },
}
if inline then
characters[slot] = {
commands = {
{ "special", "pdf:" .. topdf(slot,code) },
}
}
else
characters[slot] = {
commands = {
{
"image",
{
stream = topdf(slot,code),
bbox = { 0, -depth * 65536, width * 65536, height * 65536 }
},
},
}
}
end
end
}
local function process(mpxformat,name,instances,scalefactor)
local filename = resolvers.findfile(name)
local attributes = filename and lfs.isfile(filename) and lfs.attributes(filename)
if attributes then
statistics.starttiming(metapost.fonts)
scalefactor = scalefactor or 1
instances = instances or metapost.fonts.instances or 1 -- maybe store in liost too
local fontname = file.removesuffix(file.basename(name))
local modification = attributes.modification
local filesize = attributes.size
local hash = file.robustname(formatters["%s %05i %03i"](fontname,scalefactor*1000,instances))
local lists = containers.read(mpfonts.cache,hash)
if not lists or lists.modification ~= modification or lists.filesize ~= filesize or lists.instances ~= instances or lists.scalefactor ~= scalefactor then
statistics.starttiming(flusher)
local data = io.loaddata(filename)
metapost.reset(mpxformat)
metapost.setoutercolor(2) -- no outer color and no reset either
lists = { }
for i=1,instances do
characters = { }
descriptions = { }
metapost.process(
mpxformat,
{
formatters["randomseed := %s ;"](i*10),
formatters["charscale := %s ;"](scalefactor),
data,
},
false,
flusher,
false,
false,
"all"
)
lists[i] = {
characters = characters,
descriptions = descriptions,
parameters = {
designsize = 655360,
slant = 0,
space = 333 * scalefactor,
space_stretch = 166.5 * scalefactor,
space_shrink = 111 * scalefactor,
x_height = 431 * scalefactor,
quad = 1000 * scalefactor,
extra_space = 0,
},
properties = {
name = formatters["%s-%03i"](hash,i),
virtualized = true,
spacer = "space",
}
}
end
lists.version = metapost.variables.fontversion or "1.000"
lists.modification = modification
lists.filesize = filesize
lists.instances = instances
lists.scalefactor = scalefactor
metapost.reset(mpxformat) -- saves memory
lists = containers.write(mpfonts.cache, hash, lists)
statistics.stoptiming(flusher)
end
variants = variants + #lists
statistics.stoptiming(metapost.fonts)
return lists
else
return { }
end
end
metapost.fonts.flusher = flusher
metapost.fonts.instances = 1
metapost.fonts.process = process
local function build(g,v)
local size = g.specification.size
local data = process(v[2],v[3],v[4],size/655360,v[6])
local list = { }
local t = { }
for d=1,#data do
t = fonts.constructors.scale(data[d],-1000)
local id = font.nextid()
t.fonts = { { id = id } }
fontdata[id] = t
if v[5] then
vffonts.helpers.composecharacters(t)
end
list[d] = font.define(t)
end
for k, v in next, t do -- last t
g[k] = v -- kind of replace, when not present, make nil
end
g.properties.virtualized = true
g.variants = list
end
vffonts.combiner.commands.metapost = build
vffonts.combiner.commands.metafont = build
statistics.register("metapost font generation", function()
if total > 0 then
local time = statistics.elapsedtime(flusher)
if total > 0 then
return format("%i glyphs, %.3f seconds runtime, %i glyphs/second", total, time, total/time)
else
return format("%i glyphs, %.3f seconds runtime", total, time)
end
end
end)
statistics.register("metapost font loading",function()
if variants > 0 then
local time = statistics.elapsedtime(metapost.fonts)
if variants > 0 then
return format("%.3f seconds, %i instances, %0.3f instances/second", time, variants, variants/time)
else
return format("%.3f seconds, %i instances", time, variants)
end
end
end)
-- fonts.definers.methods.install( "bidi", {
-- {
-- "metapost", -- method
-- "metafun", -- format
-- "fontoeps.mp", -- filename
-- 1, -- instances
-- false, -- compose
-- },
-- } )
local report = logs.reporter("metapost","fonts")
function metapost.fonts.define(specification)
local fontname = specification.fontname or ""
local filename = specification.filename or ""
local format = specification.format or "metafun"
if fontname == "" then
report("no fontname given")
return
end
if filename == "" then
report("no filename given for %a",fontname)
return
end
local fullname = resolvers.findfile(filename)
if fullname == "" then
report("unable to locate file %a",filename)
return
end
report("generating font %a using format %a and file %a",fontname,format,filename)
fonts.definers.methods.install(fontname, {
{
specification.engine or "metapost",
format,
filename,
specification.instances or 1,
specification.compose or false,
},
} )
end
commands.definemetafont = metapost.fonts.define
-- metapost.fonts.define {
-- fontname = "bidi",
-- filename = "bidi-symbols.mp",
-- }
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