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%D \module
%D [ file=m-punk,
%D version=2008.04.15,
%D title=\CONTEXT\ Modules,
%D subtitle=Punk Support,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=PRAGMA]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\ifx\luaversion\undefined \endinput \fi
% At some point the font generation code will move into the
% ConTeXt MkIV kernel.
\startluacode
do
local concat = table.concat
local chardata = characters.data
local fontdata = fonts.ids
fonts.mp = fonts.mp or { }
fonts.mp.version = fonts.mp.version or 1.11
fonts.mp.inline = true
fonts.mp.cache = containers.define("fonts", "mp", fonts.mp.version, true)
metapost.characters = metapost.characters or { }
-- todo: use table share as in otf
local characters, descriptions = { }, { }
local factor, l, n, w, h, d, total, variants = 100, { }, 0, 0, 0, 0, 0, 0, true
-- A next version of mplib will provide the tfm font information which
-- gives better glyph dimensions, plus additional kerning information.
local flusher = {
startfigure = function(chrnum,llx,lly,urx,ury)
l, n = { }, chrnum
w, h, d = urx - llx, ury, -lly
total = total + 1
inline = fonts.mp.inline
end,
flushfigure = function(t)
for i=1, #t do
l[#l+1] = t[i]
end
end,
stopfigure = function()
local cd = chardata[n]
if inline then
descriptions[n] = {
-- unicode = n,
name = cd and cd.adobename,
width = w*100,
height = h*100,
depth = d*100,
boundingbox = { 0, -d, w, h },
}
characters[n] = {
commands = { -- todo: xforms, should happen in backend
{ "special", "pdf: " .. concat(l," ") },
}
}
else
descriptions[n] = {
-- unicode = n,
name = cd and cd.adobename,
width = w*100,
height = h*100,
depth = d*100,
boundingbox = { 0, -d, w, h },
}
characters[n] = {
commands = {
{ "image", { stream = concat(l," "), bbox = { 0, -d*65536, w*65536, h*65536 } } },
}
}
end
end
}
metapost.characters.instances = metapost.characters.instances or 10
function metapost.characters.process(mpxformat, name, instances, scalefactor)
statistics.starttiming(metapost.characters)
scalefactor = scalefactor or 1
instances = instances or metapost.characters.instances or 10
local fontname = file.removesuffix(file.basename(name))
local hash = file.robustname(string.format("%s %05i %03i", fontname, scalefactor*1000, instances))
local lists = containers.read(fonts.mp.cache, hash)
if not lists then
statistics.starttiming(flusher)
-- we can use a format per font
local data = io.loaddata(resolvers.find_file(name))
metapost.reset(mpxformat)
metapost.set_outer_color(2) -- no outer color and no reset either
lists = { }
for i=1,instances do
list = { }
characters, descriptions = { }, { }
metapost.process(
mpxformat,
{
"randomseed := " .. i*10 .. ";",
"scale_factor := " .. scalefactor .. " ;",
data
},
false,
flusher
)
lists[i] = {
designsize = 655360,
name = string.format("%s-%03i",hash,i),
parameters = {
slant = 0,
space = 333 * scalefactor,
space_stretch = 166.5 * scalefactor,
space_shrink = 111 * scalefactor,
x_height = 431 * scalefactor,
quad =1000 * scalefactor,
extra_space = 0
},
["type"] = "virtual",
characters = characters,
descriptions = descriptions,
-- embedding = "subset",
-- mkiv:
spacer = "space",
unit = 1000,
shared = { },
unique = { },
}
end
metapost.reset(mpxformat) -- saves memory
lists = containers.write(fonts.mp.cache, hash, lists)
statistics.stoptiming(flusher)
end
variants = variants + #lists
statistics.stoptiming(metapost.characters)
return lists
end
function fonts.vf.aux.combine.commands.metafont(g,v)
local size = g.specification.size
local data = metapost.characters.process(v[2],v[3],v[4],size/655360)
local list, t = { }, { }
for d=1,#data do
t = data[d]
t = fonts.tfm.scale(t, -1000)
local id = font.nextid()
t.fonts = { { id = id } }
fontdata[id] = t
fonts.vf.aux.compose_characters(t)
list[d] = font.define(t)
end
for k=1,#t do
g[k] = t[k] -- kind of replace, when not present, make nil
end
g.virtualized = true
g.variants = list
end
fonts.define.methods.install( "punk", {
{ "metafont", "mfplain", "punkfont.mp", 10 },
} )
cases.actions[99] = function(current)
local used = fontdata[current.font].variants
if used then
local f = math.random(1,#used)
current.font = used[f]
return current, true
else
return current, false
end
end
metapost.characters.flusher = flusher
statistics.register("metapost font generation", function()
local time = statistics.elapsedtime(flusher)
if total > 0 then
return string.format("%i glyphs, %.3f seconds runtime, %i glyphs/second", total, time, total/time)
else
return string.format("%i glyphs, %.3f seconds runtime", total, time)
end
end)
statistics.register("metapost font loading",function()
local time = statistics.elapsedtime(metapost.characters)
if variants > 0 then
return string.format("%.3f seconds, %i instances, %0.3f instances/second", time, variants, variants/time)
else
return string.format("%.3f seconds, %i instances", time, variants)
end
end)
end
\stopluacode
\unexpanded\def\EnableRandomPunk {\setcharactercasing[99]}
\unexpanded\def\RandomPunk {\groupedcommand\EnableRandomPunk\donothing}
\unexpanded\def\StartRandomPunk {\begingroup\EnableRandomPunk}
\unexpanded\def\StopRandomPunk {\endgroup}
\starttypescript [serif] [punk] [default]
\setups[font:fallback:serif] % no style variants yet
\definefontsynonym [Serif] [demo@punk]
\stoptypescript
\starttypescript [punk]
\definetypeface [punk] [rm] [serif] [punk] [default]
\stoptypescript
\definefontfeature[punknova][mode=node,script=latn,rand=yes,kern=yes,liga=yes,tlig=yes]
\starttypescript [serif] [punknova]
\setups[font:fallback:serif] % no style variants yet, actually it's a sans
\definefontsynonym [Serif] [file:punknova] [features=punknova]
\stoptypescript
\starttypescript [punknova]
\definetypeface [punknova] [rm] [serif] [punknova] [default]
\stoptypescript
\endinput
\usetypescript[punk]
\setupbodyfont[punk,14pt]
\starttext
\definedfont[demo@punk at 10pt]hello world\par
\definedfont[demo@punk at 12pt]hello world\par
\definedfont[demo@punk at 16pt]hello world\par
\definedfont[demo@punk at 20pt]hello world\par
\stoptext
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