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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
local helpinfo = [[
<?xml version="1.0"?>
<application>
<metadata>
<entry name="name">mtx-convert</entry>
<entry name="detail">ConTeXT Graphic Conversion Helpers</entry>
<entry name="version">0.10</entry>
</metadata>
<flags>
<category name="basic">
<subcategory>
<flag name="convertall"><short>convert all graphics on path</short></flag>
<flag name="inputpath" value="string"><short>original graphics path</short></flag>
<flag name="outputpath" value="string"><short>converted graphics path</short></flag>
<flag name="watch"><short>watch folders</short></flag>
<flag name="force"><short>force conversion (even if older)</short></flag>
<flag name="delay"><short>time between sweeps</short></flag>
</subcategory>
</category>
</flags>
</application>
]]
local application = logs.application {
name = "mtx-convert",
banner = "ConTeXT Graphic Conversion Helpers 0.10",
helpinfo = helpinfo,
}
local format, find = string.format, string.find
local concat = table.concat
local report = application.report
scripts = scripts or { }
scripts.convert = scripts.convert or { }
local convert = scripts.convert
convert.converters = convert.converters or { }
local converters = convert.converters
local gsprogram = os.type == "windows" and "gswin32c" or "gs"
local gstemplate_eps = "%s -q -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress -dEPSCrop -dNOPAUSE -dSAFER -dNOCACHE -dBATCH -dAutoRotatePages=/None -dProcessColorModel=/DeviceCMYK -sOutputFile=%s %s -c quit"
local gstemplate_ps = "%s -q -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress -dNOPAUSE -dSAFER -dNOCACHE -dBATCH -dAutoRotatePages=/None -dProcessColorModel=/DeviceCMYK -sOutputFile=%s %s -c quit"
function converters.eps(oldname,newname)
return format(gstemplate_eps,gsprogram,newname,oldname)
end
function converters.ps(oldname,newname)
return format(gstemplate_ps,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 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 format(imtemplate[quality],improgram,oldname,newname)
end
converters.gif = converters.jpg
converters.tif = converters.jpg
converters.tiff = converters.jpg
converters.png = converters.jpg
function converters.convertgraphic(kind,oldname,newname)
if converters[kind] then -- extra test
local tmpname = file.replacesuffix(newname,"tmp")
local command = converters[kind](oldname,tmpname)
report("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 converters.convertpath(inputpath,outputpath)
inputpath = inputpath or "."
outputpath = outputpath or "."
for name in lfs.dir(inputpath) do
local suffix = file.suffix(name)
if find(name,"%.$") then
-- skip . and ..
elseif 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)
converters.convertgraphic(suffix,oldname,newname)
end
elseif lfs.isdir(inputpath .. "/".. name) then
converters.convertpath(inputpath .. "/".. name,outputpath .. "/".. name)
end
end
end
function converters.convertfile(oldname)
local suffix = file.suffix(oldname)
if converters[suffix] then
local newname = file.replacesuffix(oldname,"pdf")
if oldname == newname then
-- todo: downsample, crop etc
elseif environment.argument("force") then
converters.convertgraphic(suffix,oldname,newname)
else
local et = lfs.attributes(oldname,"modification")
local pt = lfs.attributes(newname,"modification")
if not pt or et > pt then
converters.convertgraphic(suffix,oldname,newname)
end
end
end
end
if environment.ownscript then
-- stand alone
else
report(application.banner)
return convert
end
convert.delay = 5 * 60 -- 5 minutes
function convert.convertall()
local watch = environment.arguments.watch or false
local delay = environment.arguments.delay or convert.delay
local input = environment.arguments.inputpath or "."
local output = environment.arguments.outputpath or "."
while true do
converters.convertpath(input, output)
if watch then
os.sleep(delay)
else
break
end
end
end
function convert.convertgiven()
local files = environment.files
for i=1,#files do
converters.convertfile(files[i])
end
end
if environment.arguments.convertall then
convert.convertall()
elseif environment.files[1] then
convert.convertgiven()
elseif environment.argument("exporthelp") then
application.export(environment.argument("exporthelp"),environment.files[1])
else
application.help()
end
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