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%D \module
%D [ file=meta-imp-magick,
%D version=2021.08.03,
%D title=\METAPOST\ Graphics,
%D subtitle=Magick Manipulations,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\registerctxluafile{libs-imp-graphicsmagick}{autosuffix}
\registerctxluafile{libs-imp-imagemagick}{autosuffix}
\startluacode
local converters = {
im = "imagemagick",
imagemagick = "imagemagick",
magick = "imagemagick",
}
local frozen = false
local convert = false
-- for some reason we cannot load both libraries
function mp.lmt_magick_convert()
local specification = metapost.getparameterset("magick")
local inputname = specification.filename
if inputname then
-- we don't want to trigger reuse when we have the same input file
local hash = md5.HEX(table.sequenced(specification))
local outputname = file.addsuffix("m_k_i_v_mp_fuzzy_" .. hash,file.suffix(inputname))
-- make the table a bit unique and don't polute it
local whattodo = table.setmetatableindex( {
inputname = inputname,
outputname = outputname,
}, specification)
luatex.registertempfile(outputname)
-- now do the magick
if not convert then
convert = utilities[converters[specification.converter or "gm"] or "graphicsmagick"].convert
end
convert(whattodo)
-- and return the result
return [[figure("]] .. outputname .. [[")]]
else
-- bad luck
return [[textext("missing filename")]]
end
end
\stopluacode
\startMPdefinitions
presetparameters "magick" [
filename = "unset",
% blur = [ radius = 10, sigma = 5 ],
% noise = [ type = 4 ],
] ;
def lmt_magick = applyparameters "magick" "lmt_do_magick" enddef ;
vardef lmt_do_magick = lua.mp.lmt_magick_convert() enddef ;
\stopMPdefinitions
\continueifinputfile{meta-imp-magick.mkxl}
\enabletrackers[*lib*]
\startMPpage
presetparameters "magick" [
converter = "magick", % comment / uncomment
] ;
draw lmt_magick [
filename = "hacker.jpg",
% for im
options = { "-rotate", 180 },
] ysized 4cm ;
draw lmt_magick [
filename = "hacker.jpg",
% for gm
blur = [ radius = 10, sigma = 5 ],
noise = [ type = 2 ],
% for gm
options = { "-noise", 2 },
] ysized 4cm shifted (8cm, -4cm) ;
draw lmt_magick [
filename = "hacker.jpg",
% for gm
blur = [ radius = 5, sigma = 3 ],
noise = [ type = 4 ],
% for gm
options = { "-noise", 4 },
] ysized 4cm shifted (0, -4cm) ;
draw lmt_magick [
filename = "hacker.jpg",
blur = [ radius = 10, sigma = 5 ],
% for gm
noise = [ type = 4 ],
] ysized 4cm shifted (8cm, 0cm) ;
\stopMPpage
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