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if not modules then modules = { } end modules ['mtx-convert'] = {
version = 1.001,
comment = "companion to mtxrun.lua",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- todo: eps and svg
graphics = graphics or { }
graphics.converters = graphics.converters or { }
local gsprogram = (os.type == "windows" and "gswin32c") or "gs"
local gstemplate = "%s -q -sDEVICE=pdfwrite -dEPSCrop -dNOPAUSE -dNOCACHE -dBATCH -dAutoRotatePages=/None -dProcessColorModel=/DeviceCMYK -sOutputFile=%s %s -c quit"
function graphics.converters.eps(oldname,newname)
return gstemplate:format(gsprogram,newname,oldname)
end
local improgram = "convert"
local imtemplate = {
low = "%s -quality 0 -compress zip %s pdf:%s",
medium = "%s -quality 75 -compress zip %s pdf:%s",
high = "%s -quality 100 -compress zip %s pdf:%s",
}
function graphics.converters.jpg(oldname,newname)
local ea = environment.arguments
local quality = (ea.high and 'high') or (ea.medium and 'medium') or (ea.low and 'low') or 'high'
return imtemplate[quality]:format(improgram,oldname,newname)
end
graphics.converters.gif = graphics.converters.jpg
graphics.converters.tif = graphics.converters.jpg
graphics.converters.tiff = graphics.converters.jpg
graphics.converters.png = graphics.converters.jpg
local function convert(kind,oldname,newname)
if graphics.converters[kind] then -- extra test
local tmpname = file.replacesuffix(newname,"tmp")
local command = graphics.converters[kind](oldname,tmpname)
logs.simple("command: %s",command)
io.flush()
os.spawn(command)
os.remove(newname)
os.rename(tmpname,newname)
if lfs.attributes(newname,"size") == 0 then
os.remove(newname)
end
end
end
function graphics.converters.convertpath(inputpath,outputpath)
inputpath = inputpath or "."
outputpath = outputpath or "."
for name in lfs.dir(inputpath) do
local suffix = file.extname(name)
if name:find("%.$") then
-- skip . and ..
elseif graphics.converters[suffix] then
local oldname = file.join(inputpath,name)
local newname = file.join(outputpath,file.replacesuffix(name,"pdf"))
local et = lfs.attributes(oldname,"modification")
local pt = lfs.attributes(newname,"modification")
if not pt or et > pt then
dir.mkdirs(outputpath)
convert(suffix,oldname,newname)
end
elseif lfs.isdir(inputpath .. "/".. name) then
graphics.converters.convertpath(inputpath .. "/".. name,outputpath .. "/".. name)
end
end
end
function graphics.converters.convertfile(oldname)
local suffix = file.extname(oldname)
if graphics.converters[suffix] then
local newname = file.replacesuffix(name,"pdf")
if oldname == newname then
-- todo: downsample, crop etc
elseif environment.argument("force") then
convert(suffix,oldname,newname)
else
local et = lfs.attributes(oldname,"modification")
local pt = lfs.attributes(newname,"modification")
if not pt or et > pt then
convert(suffix,oldname,newname)
end
end
end
end
scripts = scripts or { }
scripts.convert = scripts.convert or { }
scripts.convert.delay = 5 * 60 -- 5 minutes
function scripts.convert.convertall()
local watch = environment.arguments.watch or false
local delay = environment.arguments.delay or scripts.convert.delay
local input = environment.arguments.inputpath or "."
local output = environment.arguments.outputpath or "."
while true do
graphics.converters.convertpath(input, output)
if watch then
os.sleep(delay)
else
break
end
end
end
function scripts.convert.convertgiven()
local files = environment.files
for i=1,#files do
graphics.converters.convertfile(files[i])
end
end
logs.extendbanner("ConTeXT Graphic Conversion Helpers 0.10",true)
messages.help = [[
--convertall convert all graphics on path
--inputpath=string original graphics path
--outputpath=string converted graphics path
--watch watch folders
--force force conversion (even if older)
--delay time between sweeps
]]
if environment.argument("convertall") then
scripts.convert.convertall()
elseif environment.files[1] then
scripts.convert.convertgiven()
else
logs.help(messages.help)
end
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