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if not modules then modules = { } end modules ['back-ini'] = {
version = 1.001,
comment = "companion to back-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
backends = backends or { }
local trace_backend = false
local function nothing() return nil end
backends.nothing = nothing
backends.nodeinjections = {
rgbcolor = nothing,
cmykcolor = nothing,
graycolor = nothing,
spotcolor = nothing,
transparency = nothing,
overprint = nothing,
knockout = nothing,
positive = nothing,
negative = nothing,
effect = nothing,
startlayer = nothing,
stoplayer = nothing,
switchlayer = nothing,
reference = nothing,
destination = nothing,
}
backends.codeinjections = {
prerollreference = nothing,
insertmovie = nothing,
insertsound = nothing,
presetsymbollist = nothing,
registersymbol = nothing,
registeredsymbol = nothing,
registercomment = nothing,
embedfile = nothing,
attachfile = nothing,
adddocumentinfo = nothing,
setupidentity = nothing,
setpagetransition = nothing,
defineviewerlayer = nothing,
addbookmarks = nothing,
addtransparencygroup = nothing,
typesetfield = nothing,
doiffieldelse = nothing,
doiffieldgroupelse = nothing,
definefield = nothing,
clonefield = nothing,
definefieldset = nothing,
getfieldgroup = nothing,
setformsmethod = nothing,
getdefaultfieldvalue = nothing,
setupcanvas = nothing,
initializepage = nothing,
initializedocument = nothing,
finalizepage = nothing,
finalizedocument = nothing,
flushpageactions = nothing,
flushdocumentactions = nothing,
insertrenderingwindow = nothing,
processrendering = nothing,
kindofrendering = nothing,
flushrenderingwindow = nothing,
setfigurecolorspace = nothing,
setfigurealternative = nothing,
}
backends.registrations = {
grayspotcolor = nothing,
rgbspotcolor = nothing,
cmykspotcolor = nothing,
grayindexcolor = nothing,
rgbindexcolor = nothing,
cmykindexcolor = nothing,
spotcolorname = nothing,
transparency = nothing,
}
local nodeinjections = backends.nodeinjections
local codeinjections = backends.codeinjections
local registrations = backends.registrations
backends.current = "unknown"
function backends.install(what)
if type(what) == "string" then
local backend = backends[what]
if backend then
if trace_backend then
logs.report("backend", "initializing backend %s (%s)",what,backend.comment or "no comment")
end
backends.current = what
for _, category in next, { "nodeinjections", "codeinjections", "registrations"} do
local plugin = backend[category]
if plugin then
local whereto = backends[category]
for name, meaning in next, whereto do
if plugin[name] then
whereto[name] = plugin[name]
-- logs.report("backend", "installing function %s in category %s of %s",name,category,what)
elseif trace_backend then
logs.report("backend", "no function %s in category %s of %s",name,category,what)
end
end
elseif trace_backend then
logs.report("backend", "no category %s in %s",category,what)
end
end
backends.helpers = backend.helpers
elseif trace_backend then
logs.report("backend", "no backend named %s",what)
end
end
end
statistics.register("used backend", function()
local bc = backends.current
if bc ~= "unknown" then
return string.format("%s (%s)",bc,backends[bc].comment or "no comment")
else
return nil
end
end)
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