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if not modules then modules = { } end modules ['back-mps'] = {
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"
}
local fontproperties = fonts.hashes.properties
local fontparameters = fonts.hashes.parameters
local starttiming = statistics.starttiming
local stoptiming = statistics.stoptiming
local bpfactor = number.dimenfactors.bp
local texgetbox = tex.getbox
local formatters = string.formatters
local rulecodes = nodes.rulecodes
local normalrule_code = rulecodes.normal
----- boxrule_code = rulecodes.box
----- imagerule_code = rulecodes.image
----- emptyrule_code = rulecodes.empty
----- userrule_code = rulecodes.user
----- overrule_code = rulecodes.over
----- underrule_code = rulecodes.under
----- fractionrule_code = rulecodes.fraction
----- radicalrule_code = rulecodes.radical
local outlinerule_code = rulecodes.outline
local fonts = { }
local pages = { }
local buffer = { }
local b = 0
local converter = nil
local function reset()
buffer = { }
b = 0
end
local f_font = formatters[ "\\definefont[%s][file:%s*none @ %sbp]\n" ]
local f_glyph = formatters[ [[draw textext.drt("\%s\char%i\relax") shifted (%N,%N);]] ]
local f_rule = formatters[ [[fill unitsquare xscaled %N yscaled %N shifted (%N,%N);]] ]
local f_outline = formatters[ [[draw unitsquare xscaled %N yscaled %N shifted (%N,%N);]] ]
-- actions
local function outputfilename(driver)
return tex.jobname .. "-output.tex"
end
local function save() -- might become a driver function that already is plugged into stopactions
starttiming(drivers)
if #pages > 0 then
local filename = outputfilename()
drivers.report("saving result in %a",filename)
reset()
b = b + 1
buffer[b] = "\\starttext\n"
for k, v in table.sortedhash(fonts) do
b = b + 1
buffer[b] = f_font(v.name,v.filename,v.size)
end
for i=1,#pages do
b = b + 1
buffer[b] = pages[i]
end
b = b + 1
buffer[b] = "\\stoptext\n"
io.savedata(filename,table.concat(buffer,"",1,b))
end
stoptiming(drivers)
end
local function prepare(driver)
converter = drivers.converters.lmtx
luatex.registerstopactions(1,function()
save()
end)
end
local function initialize(driver,details)
reset()
b = b + 1
buffer[b] = "\n\\startMPpage"
end
local function finalize(driver,details)
b = b + 1
buffer[b] = "\\stopMPpage\n"
pages[details.pagenumber] = table.concat(buffer,"\n",1,b)
end
local function wrapup(driver)
end
local function cleanup(driver)
reset()
end
local function convert(driver,boxnumber,pagenumber)
converter(driver,texgetbox(boxnumber),"page",pagenumber)
end
-- flushers
local last
local function updatefontstate(id)
if fonts[id] then
last = fonts[id].name
else
last = "MPSfont" .. converters.Characters(id)
fonts[id] = {
filename = file.basename(fontproperties[id].filename),
size = fontparameters[id].size * bpfactor,
name = last,
}
end
end
local function flushcharacter(current, pos_h, pos_v, pod_r, font, char)
b = b + 1
buffer[b] = f_glyph(last,char,pos_h*bpfactor,pos_v*bpfactor)
end
local function flushrule(current, pos_h, pos_v, pod_r, size_h, size_v, subtype)
if subtype == normalrule_code then
b = b + 1
buffer[b] = f_rule(size_h*bpfactor,size_v*bpfactor,pos_h*bpfactor,pos_v*bpfactor)
elseif subtype == outlinerule_code then
b = b + 1
buffer[b] = f_outline(size_h*bpfactor,size_v*bpfactor,pos_h*bpfactor,pos_v*bpfactor)
end
end
local function flushsimplerule(current, pos_h, pos_v, pod_r, size_h, size_v)
b = b + 1
buffer[b] = f_rule(size_h*bpfactor,size_v*bpfactor,pos_h*bpfactor,pos_v*bpfactor)
end
-- installer
drivers.install {
name = "mps",
actions = {
prepare = prepare,
initialize = initialize,
finalize = finalize,
wrapup = wrapup,
cleanup = cleanup,
convert = convert,
outputfilename = outputfilename,
},
flushers = {
updatefontstate = updatefontstate,
character = flushcharacter,
rule = flushrule,
simplerule = flushsimplerule,
}
}
-- extras
-- if not mp then
-- return
-- end
--
-- local mpprint = mp.print
-- local formatters = string.formatters
--
-- local f_glyph = formatters[ [[draw textext.drt("\setfontid%i\relax\char%i\relax") shifted (%N,%N);]] ]
-- local f_rule = formatters[ [[fill unitsquare xscaled %N yscaled %N shifted (%N,%N);]] ]
--
-- local current = nil
-- local size = 0
--
-- function mp.place_buffermake(box)
-- drivers.convert("mps",box)
-- current = drivers.action("mps","fetch")
-- size = #current
-- end
--
-- function mp.place_buffersize()
-- mpprint(size)
-- end
--
-- function mp.place_bufferslot(i)
-- if i > 0 and i <= size then
-- local b = buffer[i]
-- local t = b[1]
-- if t == "glyph" then
-- mpprint(f_glyph(b[2],b[3],b[4]*bpfactor,b[5]*bpfactor))
-- elseif t == "rule" then
-- mpprint(f_rule(b[2]*bpfactor,b[3]*bpfactor,b[4]*bpfactor,b[5]*bpfactor))
-- end
-- end
-- end
--
-- function mp.place_bufferwipe()
-- current = nil
-- size = 0
-- end
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