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|
if not modules then modules = { } end modules ['grph-inc'] = {
version = 1.001,
comment = "companion to grph-inc.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- todo: empty filename or only suffix always false (not found)
-- lowercase types
-- mps tex tmp svg
-- partly qualified
-- dimensions
-- use metatables
-- figures.boxnumber can go as we now can use names
-- avoid push
-- move some to command namespace
--[[
The ConTeXt figure inclusion mechanisms are among the oldest code
in ConTeXt and evolved into a complex whole. One reason is that we
deal with backend in an abstract way. What complicates matters is
that we deal with internal graphics as well: TeX code, MetaPost code,
etc. Later on figure databases were introduced, which resulted in
a plug in model for locating images. On top of that runs a conversion
mechanism (with caching) and resource logging.
Porting that to Lua is not that trivial because quite some
status information is kept between al these stages. Of course, image
reuse also has some price, and so I decided to implement the graphics
inclusion in several layers: detection, loading, inclusion, etc.
Object sharing and scaling can happen at each stage, depending on the
way the resource is dealt with.
The TeX-Lua mix is suboptimal. This has to do with the fact that we cannot
run TeX code from within Lua. Some more functionality will move to Lua.
]]--
local format, lower, find, match, gsub, gmatch = string.format, string.lower, string.find, string.match, string.gsub, string.gmatch
local texbox = tex.box
local contains = table.contains
local concat, insert, remove = table.concat, table.insert, table.remove
local todimen = string.todimen
local collapsepath = file.collapsepath
local formatters = string.formatters
local longtostring = string.longtostring
local expandfilename = dir.expandname
local P, lpegmatch = lpeg.P, lpeg.match
local settings_to_array = utilities.parsers.settings_to_array
local settings_to_hash = utilities.parsers.settings_to_hash
local allocate = utilities.storage.allocate
local setmetatableindex = table.setmetatableindex
local replacetemplate = utilities.templates.replace
local variables = interfaces.variables
local codeinjections = backends.codeinjections
local nodeinjections = backends.nodeinjections
local trace_figures = false trackers.register("graphics.locating", function(v) trace_figures = v end)
local trace_bases = false trackers.register("graphics.bases", function(v) trace_bases = v end)
local trace_programs = false trackers.register("graphics.programs", function(v) trace_programs = v end)
local trace_conversion = false trackers.register("graphics.conversion", function(v) trace_conversion = v end)
local trace_inclusion = false trackers.register("graphics.inclusion", function(v) trace_inclusion = v end)
local report_inclusion = logs.reporter("graphics","inclusion")
local context, img = context, img
local f_hash_part = formatters["%s->%s->%s"]
local f_hash_full = formatters["%s->%s->%s->%s->%s->%s->%s"]
local v_yes = variables.yes
local v_low = variables.low
local v_medium = variables.medium
local v_high = variables.high
local v_global = variables["global"]
local v_local = variables["local"]
local v_default = variables.default
local maxdimen = 2^30-1
function img.check(figure)
if figure then
local width = figure.width
local height = figure.height
if height > width then
if height > maxdimen then
figure.height = maxdimen
figure.width = width * maxdimen/height
report_inclusion("limiting natural dimensions of %q (height)",figure.filename or "?")
end
elseif width > maxdimen then
figure.width = maxdimen
figure.height = height * maxdimen/width
report_inclusion("limiting natural dimensions of %q (width)",figure.filename or "?")
end
return figure
end
end
--- some extra img functions --- can become luat-img.lua
local imgkeys = img.keys()
function img.totable(imgtable)
local result = { }
for k=1,#imgkeys do
local key = imgkeys[k]
result[key] = imgtable[key]
end
return result
end
function img.serialize(i,...)
return table.serialize(img.totable(i),...)
end
function img.print(i,...)
return table.print(img.totable(i),...)
end
function img.clone(i,data)
i.width = data.width or i.width
i.height = data.height or i.height
-- attr etc
return i
end
local validsizes = table.tohash(img.boxes())
local validtypes = table.tohash(img.types())
function img.checksize(size)
if size then
size = gsub(size,"box","")
return validsizes[size] and size or "crop"
else
return "crop"
end
end
local indexed = { }
function img.ofindex(n)
return indexed[n]
end
--- we can consider an grph-ini file
figures = figures or { }
local figures = figures
figures.boxnumber = figures.boxnumber or 0
figures.defaultsearch = true
figures.defaultwidth = 0
figures.defaultheight = 0
figures.defaultdepth = 0
figures.nofprocessed = 0
figures.preferquality = true -- quality over location
local figures_loaded = allocate() figures.loaded = figures_loaded
local figures_used = allocate() figures.used = figures_used
local figures_found = allocate() figures.found = figures_found
local figures_suffixes = allocate() figures.suffixes = figures_suffixes
local figures_patterns = allocate() figures.patterns = figures_patterns
local figures_resources = allocate() figures.resources = figures_resources
local existers = allocate() figures.existers = existers
local checkers = allocate() figures.checkers = checkers
local includers = allocate() figures.includers = includers
local converters = allocate() figures.converters = converters
local identifiers = allocate() figures.identifiers = identifiers
local programs = allocate() figures.programs = programs
local defaultformat = "pdf"
local defaultprefix = "m_k_i_v_"
figures.localpaths = allocate {
".", "..", "../.."
}
figures.cachepaths = allocate {
prefix = "",
path = ".",
subpath = ".",
}
local figure_paths = allocate(table.copy(figures.localpaths))
figures.paths = figure_paths
local figures_order = allocate {
"pdf", "mps", "jpg", "png", "jp2", "jbig", "svg", "eps", "tif", "gif", "mov", "buffer", "tex", "cld", "auto",
}
local figures_formats = allocate { -- magic and order will move here
["pdf"] = { list = { "pdf" } },
["mps"] = { patterns = { "mps", "%d+" } },
["jpg"] = { list = { "jpg", "jpeg" } },
["png"] = { list = { "png" } },
["jp2"] = { list = { "jp2" } },
["jbig"] = { list = { "jbig", "jbig2", "jb2" } },
["svg"] = { list = { "svg", "svgz" } },
["eps"] = { list = { "eps", "ai" } },
["gif"] = { list = { "gif" } },
["tif"] = { list = { "tif", "tiff" } },
["mov"] = { list = { "mov", "flv", "mp4" } }, -- "avi" is not supported
["buffer"] = { list = { "tmp", "buffer", "buf" } },
["tex"] = { list = { "tex" } },
["cld"] = { list = { "cld" } },
["auto"] = { list = { "auto" } },
}
local figures_magics = allocate {
{ format = "png", pattern = P("\137PNG\013\010\026\010") }, -- 89 50 4E 47 0D 0A 1A 0A,
{ format = "jpg", pattern = P("\255\216\255") }, -- FF D8 FF
{ format = "jp2", pattern = P("\000\000\000\012\106\080\032\032\013\010"), }, -- 00 00 00 0C 6A 50 20 20 0D 0A },
{ format = "gif", pattern = P("GIF") },
{ format = "pdf", pattern = (1 - P("%PDF"))^0 * P("%PDF") },
}
figures.formats = figures_formats -- frozen
figures.magics = figures_magics -- frozen
figures.order = figures_order -- frozen
-- We can set the order but only indirectly so that we can check for support.
function figures.setorder(list) -- can be table or string
if type(list) == "string" then
list = settings_to_array(list)
end
if list and #list > 0 then
figures_order = allocate()
figures.order = figures_order
local done = { } -- just to be sure in case the list is generated
for i=1,#list do
local l = lower(list[i])
if figures_formats[l] and not done[l] then
figures_order[#figures_order+1] = l
done[l] = true
end
end
report_inclusion("lookup order: %s",concat(figures_order," "))
else
-- invalid list
end
end
function figures.guess(filename)
local f = io.open(filename,'rb')
if f then
local str = f:read(100)
f:close()
if str then
for i=1,#figures_magics do
local pattern = figures_magics[i]
if lpegmatch(pattern.pattern,str) then
local format = pattern.format
if trace_figures then
report_inclusion("file %q has format %s",filename,format)
end
return format
end
end
end
end
end
local function setlookups() -- tobe redone .. just set locals
figures_suffixes = allocate()
figures_patterns = allocate()
for _, format in next, figures_order do
local data = figures_formats[format]
local list = data.list
if list then
for i=1,#list do
figures_suffixes[list[i]] = format -- hash
end
else
figures_suffixes[format] = format
end
local patterns = data.patterns
if patterns then
for i=1,#patterns do
figures_patterns[#figures_patterns+1] = { patterns[i], format } -- array
end
end
end
figures.suffixes = figures_suffixes
figures.patterns = figures_patterns
end
setlookups()
figures.setlookups = setlookups
function figures.registerresource(t)
local n = #figures_resources + 1
figures_resources[n] = t
return n
end
local function register(tag,target,what)
local data = figures_formats[target] -- resolver etc
if not data then
data = { }
figures_formats[target] = data
end
local d = data[tag] -- list or pattern
if d and not contains(d,what) then
d[#d+1] = what -- suffix or patternspec
else
data[tag] = { what }
end
if not contains(figures_order,target) then
figures_order[#figures_order+1] = target
end
setlookups()
end
function figures.registersuffix (suffix, target) register('list', target,suffix ) end
function figures.registerpattern(pattern,target) register('pattern',target,pattern) end
local last_locationset = last_locationset or nil
local last_pathlist = last_pathlist or nil
function figures.setpaths(locationset,pathlist)
if last_locationset == locationset and last_pathlist == pathlist then
-- this function can be called each graphic so we provide this optimization
return
end
local t, h = figure_paths, settings_to_hash(locationset)
if last_locationset ~= locationset then
-- change == reset (actually, a 'reset' would indeed reset
if h[v_local] then
t = table.fastcopy(figures.localpaths or { })
else
t = { }
end
figures.defaultsearch = h[v_default]
last_locationset = locationset
end
if h[v_global] then
local list = settings_to_array(pathlist)
for i=1,#list do
local s = list[i]
if not contains(t,s) then
t[#t+1] = s
end
end
end
figure_paths = t
last_pathlist = pathlist
figures.paths = figure_paths
if trace_figures then
report_inclusion("locations: %s",last_locationset)
report_inclusion("path list: %s",concat(figure_paths, " "))
end
end
-- check conversions and handle it here
function figures.hash(data)
local status = data and data.status
return (status and status.hash or tostring(status.private)) or "nohash" -- the <img object>
end
-- interfacing to tex
local function new() -- we could use metatables status -> used -> request but it needs testing
local request = {
name = false,
label = false,
format = false,
page = false,
width = false,
height = false,
preview = false,
["repeat"] = false,
controls = false,
display = false,
mask = false,
conversion = false,
resolution = false,
cache = false,
prefix = false,
size = false,
}
local used = {
fullname = false,
format = false,
name = false,
path = false,
suffix = false,
width = false,
height = false,
}
local status = {
status = 0,
converted = false,
cached = false,
fullname = false,
format = false,
}
-- this needs checking because we might check for nil, the test case
-- is getfiguredimensions which then should return ~= 0
-- setmetatableindex(status, used)
-- setmetatableindex(used, request)
return {
request = request,
used = used,
status = status,
}
end
-- use table.insert|remove
local lastfiguredata = nil -- will be topofstack or last so no { } (else problems with getfiguredimensions)
local callstack = { }
function figures.initialize(request)
local figuredata = new()
if request then
-- request.width/height are strings and are only used when no natural dimensions
-- can be determined; at some point the handlers might set them to numbers instead
local w = tonumber(request.width) or 0
local h = tonumber(request.height) or 0
request.width = w > 0 and w or nil
request.height = h > 0 and h or nil
--
request.page = math.max(tonumber(request.page) or 1,1)
request.size = img.checksize(request.size)
request.object = request.object == v_yes
request["repeat"] = request["repeat"] == v_yes
request.preview = request.preview == v_yes
request.cache = request.cache ~= "" and request.cache
request.prefix = request.prefix ~= "" and request.prefix
request.format = request.format ~= "" and request.format
table.merge(figuredata.request,request)
end
return figuredata
end
function figures.push(request)
statistics.starttiming(figures)
local figuredata = figures.initialize(request)
insert(callstack,figuredata)
lastfiguredata = figuredata
return figuredata
end
function figures.pop()
lastfiguredata = remove(callstack) or lastfiguredata
statistics.stoptiming(figures)
end
function figures.current()
return callstack[#callstack] or lastfiguredata
end
local function get(category,tag,default)
local value = lastfiguredata and lastfiguredata[category]
value = value and value[tag]
if not value or value == "" or value == true then
return default or ""
else
return value
end
end
figures.get = get
function commands.figurevariable(category,tag,default)
context(get(category,tag,default))
end
function commands.figurestatus (tag,default) context(get("status", tag,default)) end
function commands.figurerequest(tag,default) context(get("request",tag,default)) end
function commands.figureused (tag,default) context(get("used", tag,default)) end
function commands.figurefilepath() context(file.dirname (get("used","fullname"))) end
function commands.figurefilename() context(file.nameonly(get("used","fullname"))) end
function commands.figurefiletype() context(file.extname (get("used","fullname"))) end
-- todo: local path or cache path
local function forbiddenname(filename)
if not filename or filename == "" then
return false
end
local expandedfullname = collapsepath(filename,true)
local expandedinputname = collapsepath(file.addsuffix(environment.jobfilename,environment.jobfilesuffix),true)
if expandedfullname == expandedinputname then
report_inclusion("skipping graphic with same name as input filename (%s), enforce suffix",expandedinputname)
return true
end
local expandedoutputname = collapsepath(codeinjections.getoutputfilename(),true)
if expandedfullname == expandedoutputname then
report_inclusion("skipping graphic with same name as output filename (%s), enforce suffix",expandedoutputname)
return true
end
end
local function register(askedname,specification)
if not specification then
specification = { }
elseif forbiddenname(specification.fullname) then
specification = { }
else
local format = specification.format
if format then
local conversion = specification.conversion
local resolution = specification.resolution
if conversion == "" then
conversion = nil
end
if resolution == "" then
resolution = nil
end
local newformat = conversion
if not newformat or newformat == "" then
newformat = defaultformat
end
if trace_conversion then
report_inclusion("checking conversion of '%s' (%s): old format '%s', new format '%s', conversion '%s', resolution '%s'",
askedname,specification.fullname,format,newformat,conversion or "default",resolution or "default")
end
-- quick hack
-- local converter = (newformat ~= format) and converters[format]
local converter = (newformat ~= format or resolution) and converters[format]
if converter then
if converter[newformat] then
converter = converter[newformat]
else
newformat = defaultformat
if converter[newformat] then
converter = converter[newformat]
else
converter = nil
newformat = defaultformat
end
end
elseif trace_conversion then
report_inclusion("no converter for '%s' -> '%s'",format,newformat)
end
if converter then
local oldname = specification.fullname
local newpath = file.dirname(oldname)
local oldbase = file.basename(oldname)
--
-- problem: we can have weird filenames, like a.b.c (no suffix) and a.b.c.gif
-- so we cannot safely remove a suffix (unless we do that for known suffixes)
--
-- local newbase = file.removesuffix(oldbase) -- assumes a known suffix
--
-- so we now have (also see *):
--
local newbase = oldbase
--
local fc = specification.cache or figures.cachepaths.path
if fc and fc ~= "" and fc ~= "." then
newpath = fc
else
newbase = defaultprefix .. newbase
end
if not file.is_writable(newpath) then
if trace_conversion then
report_inclusion("path '%s'is not writable, forcing conversion path '.' ",newpath)
end
newpath = "."
end
local subpath = specification.subpath or figures.cachepaths.subpath
if subpath and subpath ~= "" and subpath ~= "." then
newpath = newpath .. "/" .. subpath
end
local prefix = specification.prefix or figures.cachepaths.prefix
if prefix and prefix ~= "" then
newbase = prefix .. newbase
end
if resolution and resolution ~= "" then -- the order might change
newbase = newbase .. "_" .. resolution
end
--
-- see *, we had:
--
-- local newbase = file.addsuffix(newbase,newformat)
--
-- but now have (result of Aditya's web image testing):
--
-- as a side effect we can now have multiple fetches with different
-- original figures_formats, not that it matters much (apart from older conversions
-- sticking around)
--
local newbase = newbase .. "." .. newformat
--
local newname = file.join(newpath,newbase)
dir.makedirs(newpath)
oldname = collapsepath(oldname)
newname = collapsepath(newname)
local oldtime = lfs.attributes(oldname,'modification') or 0
local newtime = lfs.attributes(newname,'modification') or 0
if newtime == 0 or oldtime > newtime then
if trace_conversion then
report_inclusion("converting '%s' (%s) from '%s' to '%s'",askedname,oldname,format,newformat)
end
converter(oldname,newname,resolution or "")
else
if trace_conversion then
report_inclusion("no need to convert '%s' (%s) from '%s' to '%s'",askedname,oldname,format,newformat)
end
end
if io.exists(newname) and io.size(newname) > 0 then
specification.foundname = oldname
specification.fullname = newname
specification.prefix = prefix
specification.subpath = subpath
specification.converted = true
format = newformat
if not figures_suffixes[format] then
-- maybe the new format is lowres.png (saves entry in suffixes)
-- so let's do thsi extra check
local suffix = file.suffix(newformat)
if figures_suffixes[suffix] then
if trace_figures then
report_inclusion("using suffix '%s' as format for '%s'",suffix,format)
end
format = suffix
end
end
elseif io.exists(oldname) then
specification.fullname = oldname -- was newname
specification.converted = false
end
end
end
local found = figures_suffixes[format] -- validtypes[format]
if not found then
specification.found = false
if trace_figures then
report_inclusion("format not supported: %s",format)
end
else
specification.found = true
if trace_figures then
if validtypes[format] then -- format?
report_inclusion("format natively supported by backend: %s",format)
else
report_inclusion("format supported by output file format: %s",format)
end
end
end
end
specification.foundname = specification.foundname or specification.fullname
local askedhash = f_hash_part(askedname,specification.conversion or "default",specification.resolution or "default")
figures_found[askedhash] = specification
return specification
end
local resolve_too = false -- true
local function locate(request) -- name, format, cache
-- not resolvers.cleanpath(request.name) as it fails on a!b.pdf and b~c.pdf
-- todo: more restricted cleanpath
local askedname = request.name
local askedhash = f_hash_part(askedname,request.conversion or "default",request.resolution or "default")
local foundname = figures_found[askedhash]
if foundname then
return foundname
end
--
local askedcache = request.cache
local askedconversion = request.conversion
local askedresolution = request.resolution
--
if request.format == "" or request.format == "unknown" then
request.format = nil
end
-- protocol check
local hashed = url.hashed(askedname)
if not hashed then
-- go on
elseif hashed.scheme == "file" then
local path = hashed.path
if path and path ~= "" then
askedname = path
end
else
local foundname = resolvers.findbinfile(askedname)
if not lfs.isfile(foundname) then -- foundname can be dummy
if trace_figures then
report_inclusion("strategy: unresolved url: %s",askedname)
end
-- url not found
return register(askedname)
end
local askedformat = request.format or file.suffix(askedname) or ""
local guessedformat = figures.guess(foundname)
if askedformat ~= guessedformat then
if trace_figures then
report_inclusion("strategy: resolved url: %s, unknown format",askedname)
end
-- url found, but wrong format
return register(askedname)
else
if trace_figures then
report_inclusion("strategy: resolved url: %s -> %s",askedname,foundname)
end
return register(askedname, {
askedname = askedname,
fullname = foundname,
format = askedformat,
cache = askedcache,
conversion = askedconversion,
resolution = askedresolution,
})
end
end
-- we could use the hashed data instead
local askedpath= file.is_rootbased_path(askedname)
local askedbase = file.basename(askedname)
local askedformat = request.format or file.suffix(askedname) or ""
if askedformat ~= "" then
askedformat = lower(askedformat)
if trace_figures then
report_inclusion("strategy: forced format %s",askedformat)
end
local format = figures_suffixes[askedformat]
if not format then
for i=1,#figures_patterns do
local pattern = figures_patterns[i]
if find(askedformat,pattern[1]) then
format = pattern[2]
break
end
end
end
if format then
local foundname, quitscanning, forcedformat = figures.exists(askedname,format,resolve_too) -- not askedformat
if foundname then
return register(askedname, {
askedname = askedname,
fullname = foundname, -- askedname,
format = forcedformat or format,
cache = askedcache,
-- foundname = foundname, -- no
conversion = askedconversion,
resolution = askedresolution,
})
elseif quitscanning then
return register(askedname)
end
elseif trace_figures then
report_inclusion("strategy: unknown format %s",askedformat)
end
if askedpath then
-- path and type given, todo: strip pieces of path
local foundname, quitscanning, forcedformat = figures.exists(askedname,askedformat,resolve_too)
if foundname then
return register(askedname, {
askedname = askedname,
fullname = foundname, -- askedname,
format = forcedformat or askedformat,
cache = askedcache,
conversion = askedconversion,
resolution = askedresolution,
})
end
else
-- type given
for i=1,#figure_paths do
local path = figure_paths[i]
local check = path .. "/" .. askedname
-- we pass 'true' as it can be an url as well, as the type
-- is given we don't waste much time
local foundname, quitscanning, forcedformat = figures.exists(check,askedformat,resolve_too)
if foundname then
return register(check, {
askedname = askedname,
fullname = check,
format = askedformat,
cache = askedcache,
conversion = askedconversion,
resolution = askedresolution,
})
end
end
if figures.defaultsearch then
local check = resolvers.findfile(askedname)
if check and check ~= "" then
return register(askedname, {
askedname = askedname,
fullname = check,
format = askedformat,
cache = askedcache,
conversion = askedconversion,
resolution = askedresolution,
})
end
end
end
elseif askedpath then
if trace_figures then
report_inclusion("strategy: rootbased path")
end
for i=1,#figures_order do
local format = figures_order[i]
local list = figures_formats[format].list or { format }
for j=1,#list do
local suffix = list[j]
local check = file.addsuffix(askedname,suffix)
local foundname, quitscanning, forcedformat = figures.exists(check,format,resolve_too)
if foundname then
return register(askedname, {
askedname = askedname,
fullname = foundname, -- check,
format = forcedformat or format,
cache = askedcache,
conversion = askedconversion,
resolution = askedresolution,
})
end
end
end
else
if figures.preferquality then
if trace_figures then
report_inclusion("strategy: unknown format, prefer quality")
end
for j=1,#figures_order do
local format = figures_order[j]
local list = figures_formats[format].list or { format }
for k=1,#list do
local suffix = list[k]
-- local name = file.replacesuffix(askedbase,suffix)
local name = file.replacesuffix(askedname,suffix)
for i=1,#figure_paths do
local path = figure_paths[i]
local check = path .. "/" .. name
local isfile = url.hashed(check).scheme == "file"
if not isfile then
if trace_figures then
report_inclusion("warning: skipping path %s",path)
end
else
local foundname, quitscanning, forcedformat = figures.exists(check,format,resolve_too) -- true)
if foundname then
return register(askedname, {
askedname = askedname,
fullname = foundname, -- check
format = forcedformat or format,
cache = askedcache,
conversion = askedconversion,
resolution = askedresolution,
})
end
end
end
end
end
else -- 'location'
if trace_figures then
report_inclusion("strategy: unknown format, prefer path")
end
for i=1,#figure_paths do
local path = figure_paths[i]
for j=1,#figures_order do
local format = figures_order[j]
local list = figures_formats[format].list or { format }
for k=1,#list do
local suffix = list[k]
local check = path .. "/" .. file.replacesuffix(askedbase,suffix)
local foundname, quitscanning, forcedformat = figures.exists(check,format,resolve_too)
if foundname then
return register(askedname, {
askedname = askedname,
fullname = foudname, -- check,
format = forcedformat or format,
cache = askedcache,
conversion = askedconversion,
resolution = askedresolution,
})
end
end
end
end
end
if figures.defaultsearch then
if trace_figures then
report_inclusion("strategy: default tex path")
end
for j=1,#figures_order do
local format = figures_order[j]
local list = figures_formats[format].list or { format }
for k=1,#list do
local suffix = list[k]
local check = resolvers.findfile(file.replacesuffix(askedname,suffix))
if check and check ~= "" then
return register(askedname, {
askedname = askedname,
fullname = check,
format = format,
cache = askedcache,
conversion = askedconversion,
resolution = askedresolution,
})
end
end
end
end
end
return register(askedname, { -- these two are needed for hashing 'found'
conversion = askedconversion,
resolution = askedresolution,
})
end
-- -- -- plugins -- -- --
function identifiers.default(data)
local dr, du, ds = data.request, data.used, data.status
local l = locate(dr)
local foundname = l.foundname
local fullname = l.fullname or foundname
if fullname then
du.format = l.format or false
du.fullname = fullname -- can be cached
ds.fullname = foundname -- original
ds.format = l.format
ds.status = (l.found and 10) or 0
end
return data
end
function figures.identify(data)
data = data or callstack[#callstack] or lastfiguredata
local list = identifiers.list -- defined at the end
for i=1,#list do
local identifier = list[i]
data = identifier(data)
if data.status.status > 0 then
break
end
end
return data
end
function figures.exists(askedname,format,resolve)
return (existers[format] or existers.generic)(askedname,resolve)
end
function figures.check(data)
data = data or callstack[#callstack] or lastfiguredata
return (checkers[data.status.format] or checkers.generic)(data)
end
function figures.include(data)
data = data or callstack[#callstack] or lastfiguredata
return (includers[data.status.format] or includers.generic)(data)
end
function figures.scale(data) -- will become lua code
context.doscalefigure()
return data
end
function figures.done(data)
figures.nofprocessed = figures.nofprocessed + 1
data = data or callstack[#callstack] or lastfiguredata
local dr, du, ds, nr = data.request, data.used, data.status, figures.boxnumber
local box = texbox[nr]
ds.width = box.width
ds.height = box.height
ds.xscale = ds.width /(du.width or 1)
ds.yscale = ds.height/(du.height or 1)
ds.page = ds.page or du.page or dr.page -- sort of redundant but can be limited
return data
end
function figures.dummy(data)
data = data or callstack[#callstack] or lastfiguredata
local dr, du, nr = data.request, data.used, figures.boxnumber
local box = node.hpack(node.new("hlist")) -- we need to set the dir (luatex 0.60 buglet)
du.width = du.width or figures.defaultwidth
du.height = du.height or figures.defaultheight
du.depth = du.depth or figures.defaultdepth
-- box.dir = "TLT"
box.width = du.width
box.height = du.height
box.depth = du.depth
texbox[nr] = box -- hm, should be global (to be checked for consistency)
end
-- -- -- generic -- -- --
function existers.generic(askedname,resolve)
-- not findbinfile
local result
if lfs.isfile(askedname) then
result = askedname
elseif resolve then
result = resolvers.findbinfile(askedname) or ""
if result == "" then result = false end
end
if trace_figures then
if result then
report_inclusion("found: %s -> %s",askedname,result)
else
report_inclusion("not found: %s",askedname)
end
end
return result
end
function checkers.generic(data)
local dr, du, ds = data.request, data.used, data.status
local name = du.fullname or "unknown generic"
local page = du.page or dr.page
local size = dr.size or "crop"
local color = dr.color or "natural"
local mask = dr.mask or "none"
local conversion = dr.conversion
local resolution = dr.resolution
if not conversion or conversion == "" then
conversion = "unknown"
end
if not resolution or resolution == "" then
resolution = "unknown"
end
local hash = f_hash_full(name,page,size,color,conversion,resolution,mask)
local figure = figures_loaded[hash]
if figure == nil then
figure = img.new {
filename = name,
page = page,
pagebox = dr.size,
-- visiblefilename = "", -- this prohibits the full filename ending up in the file
}
codeinjections.setfigurecolorspace(data,figure)
codeinjections.setfiguremask(data,figure)
figure = figure and img.check(img.scan(figure)) or false
local f, d = codeinjections.setfigurealternative(data,figure)
figure, data = f or figure, d or data
figures_loaded[hash] = figure
if trace_conversion then
report_inclusion("new graphic, hash: %s",hash)
end
else
if trace_conversion then
report_inclusion("existing graphic, hash: %s",hash)
end
end
if figure then
du.width = figure.width
du.height = figure.height
du.pages = figure.pages
du.depth = figure.depth or 0
du.colordepth = figure.colordepth or 0
du.xresolution = figure.xres or 0
du.yresolution = figure.yres or 0
du.xsize = figure.xsize or 0
du.ysize = figure.ysize or 0
ds.private = figure
ds.hash = hash
end
return data
end
function includers.generic(data)
local dr, du, ds = data.request, data.used, data.status
-- here we set the 'natural dimensions'
dr.width = du.width
dr.height = du.height
local hash = figures.hash(data)
local figure = figures_used[hash]
-- figures.registerresource {
-- filename = du.fullname,
-- width = dr.width,
-- height = dr.height,
-- }
if figure == nil then
figure = ds.private
if figure then
figure = img.copy(figure)
figure = figure and img.clone(figure,data.request) or false
end
figures_used[hash] = figure
end
if figure then
local nr = figures.boxnumber
-- it looks like we have a leak in attributes here .. todo
local box = node.hpack(img.node(figure)) -- img.node(figure) not longer valid
indexed[figure.index] = figure
box.width, box.height, box.depth = figure.width, figure.height, 0 -- new, hm, tricky, we need to do that in tex (yet)
texbox[nr] = box
ds.objectnumber = figure.objnum
context.relocateexternalfigure()
end
return data
end
-- -- -- nongeneric -- -- --
local function checkers_nongeneric(data,command) -- todo: macros and context.*
local dr, du, ds = data.request, data.used, data.status
local name = du.fullname or "unknown nongeneric"
local hash = name
if dr.object then
-- hm, bugged ... waiting for an xform interface
if not job.objects.get("FIG::"..hash) then
if type(command) == "function" then
command()
end
context.dosetfigureobject(hash)
end
context.doboxfigureobject(hash)
elseif type(command) == "function" then
command()
end
return data
end
local function includers_nongeneric(data)
return data
end
checkers.nongeneric = checkers_nongeneric
includers.nongeneric = includers_nongeneric
-- -- -- mov -- -- --
function checkers.mov(data)
local dr, du, ds = data.request, data.used, data.status
local width = todimen(dr.width or figures.defaultwidth)
local height = todimen(dr.height or figures.defaultheight)
local foundname = du.fullname
dr.width, dr.height = width, height
du.width, du.height, du.foundname = width, height, foundname
if trace_inclusion then
report_inclusion("including movie '%s': width %s, height %s",foundname,width,height)
end
-- we need to push the node.write in between ... we could make a shared helper for this
context.startfoundexternalfigure(width .. "sp",height .. "sp")
context(function()
nodeinjections.insertmovie {
width = width,
height = height,
factor = number.dimenfactors.bp,
["repeat"] = dr["repeat"],
controls = dr.controls,
preview = dr.preview,
label = dr.label,
foundname = foundname,
}
end)
context.stopfoundexternalfigure()
return data
end
includers.mov = includers.nongeneric
-- -- -- mps -- -- --
local function internal(askedname)
local spec, mprun, mpnum = match(lower(askedname),"mprun(:?)(.-)%.(%d+)")
if spec == ":" then
return mprun, mpnum
else
return "", mpnum
end
end
function existers.mps(askedname)
local mprun, mpnum = internal(askedname)
if mpnum then
return askedname
else
return existers.generic(askedname)
end
end
function checkers.mps(data)
local mprun, mpnum = internal(data.used.fullname)
if mpnum then
return checkers_nongeneric(data,function() context.docheckfiguremprun(mprun,mpnum) end)
else
return checkers_nongeneric(data,function() context.docheckfiguremps(data.used.fullname) end)
end
end
includers.mps = includers.nongeneric
-- -- -- tex -- -- --
function existers.tex(askedname)
askedname = resolvers.findfile(askedname)
return askedname ~= "" and askedname or false
end
function checkers.tex(data)
return checkers_nongeneric(data,function() context.docheckfiguretex(data.used.fullname) end)
end
includers.tex = includers.nongeneric
-- -- -- buffer -- -- --
function existers.buffer(askedname)
local name = file.nameonly(askedname)
local okay = buffers.exists(name)
return okay and name, true -- always quit scanning
end
function checkers.buffer(data)
return checkers_nongeneric(data,function() context.docheckfigurebuffer(file.nameonly(data.used.fullname)) end)
end
includers.buffers = includers.nongeneric
-- -- -- auto -- -- --
function existers.auto(askedname)
local name = gsub(askedname, ".auto$", "")
local format = figures.guess(name)
if format then
report_inclusion("format guess for %q: %s",name,format)
else
report_inclusion("format guess for %q is not possible",name)
end
return format and name, true, format
end
checkers.auto = checkers.generic
includers.auto = includers.generic
-- -- -- cld -- -- --
existers.cld = existers.tex
function checkers.cld(data)
return checkers_nongeneric(data,function() context.docheckfigurecld(data.used.fullname) end)
end
includers.cld = includers.nongeneric
-- -- -- converters -- -- --
local function makeoptions(options)
local to = type(options)
return (to == "table" and concat(options," ")) or (to == "string" and options) or ""
end
-- programs.makeoptions = makeoptions
local function runprogram(binary,argument,variables)
local binary = match(binary,"[%S]+") -- to be sure
if type(argument) == "table" then
argument = concat(argument," ") -- for old times sake
end
if not os.which(binary) then
report_inclusion("program '%s' is not installed, not running: %s",binary,command)
elseif not argument or argument == "" then
report_inclusion("nothing to run %q",binary)
else
local command = format("%q %s",binary,replacetemplate(longtostring(argument),variables))
if trace_conversion or trace_programs then
report_inclusion("running: %s",command)
end
os.spawn(command)
end
end
programs.run = runprogram
-- -- -- eps & pdf -- -- --
--
-- \externalfigure[cow.eps]
-- \externalfigure[cow.pdf][conversion=stripped]
local epsconverter = converters.eps or { }
converters.eps = epsconverter
converters.ps = epsconverter
local epstopdf = {
resolutions = {
[v_low] = "screen",
[v_medium] = "ebook",
[v_high] = "prepress",
},
command = os.type == "windows" and "gswin32c" or "gs",
-- -dProcessDSCComments=false
argument = [[
-q
-sDEVICE=pdfwrite
-dNOPAUSE
-dNOCACHE
-dBATCH
-dAutoRotatePages=/None
-dPDFSETTINGS=/%presets%
-dEPSCrop
-sOutputFile=%newname%
%oldname%
-c quit
]],
}
programs.epstopdf = epstopdf
programs.gs = epstopdf
function epsconverter.pdf(oldname,newname,resolution) -- the resolution interface might change
local epstopdf = programs.epstopdf -- can be changed
local presets = epstopdf.resolutions[resolution or ""] or epstopdf.resolutions.high
runprogram(epstopdf.command, epstopdf.argument, {
newname = newname,
oldname = oldname,
presets = presets,
} )
end
epsconverter.default = epsconverter.pdf
local pdfconverter = converters.pdf or { }
converters.pdf = pdfconverter
programs.pdftoeps = {
command = "pdftops",
argument = [[-eps "%oldname%" "%newname%]],
}
pdfconverter.stripped = function(oldname,newname)
local pdftoeps = programs.pdftoeps -- can be changed
local epstopdf = programs.epstopdf -- can be changed
local presets = epstopdf.resolutions[resolution or ""] or epstopdf.resolutions.high
local tmpname = newname .. ".tmp"
runprogram(pdftoeps.command, pdftoeps.argument, { oldname = oldname, newname = tmpname, presets = presets })
runprogram(epstopdf.command, epstopdf.argument, { oldname = tmpname, newname = newname, presets = presets })
os.remove(tmpname)
end
figures.registersuffix("stripped","pdf")
-- -- -- svg -- -- --
local svgconverter = { }
converters.svg = svgconverter
converters.svgz = svgconverter
-- inkscape on windows only works with complete paths
programs.inkscape = {
command = "inkscape",
pdfargument = [[
"%oldname%"
--export-dpi=600
-A
"%newname%"
]],
pngargument = [[
"%oldname%"
--export-dpi=600
--export-png="%newname%"
]],
}
function svgconverter.pdf(oldname,newname)
local inkscape = programs.inkscape -- can be changed
runprogram(inkscape.command, inkscape.pdfargument, {
newname = expandfilename(newname),
oldname = expandfilename(oldname),
} )
end
function svgconverter.png(oldname,newname)
local inkscape = programs.inkscape
runprogram(inkscape.command, inkscape.pngargument, {
newname = expandfilename(newname),
oldname = expandfilename(oldname),
} )
end
svgconverter.default = svgconverter.pdf
-- -- -- gif -- -- --
-- -- -- tif -- -- --
local gifconverter = converters.gif or { }
local tifconverter = converters.tif or { }
local bmpconverter = converters.bmp or { }
converters.gif = gifconverter
converters.tif = tifconverter
converters.bmp = bmpconverter
programs.convert = {
command = "gm", -- graphicmagick
argument = [[convert "%oldname%" "%newname%"]],
}
local function converter(oldname,newname)
local convert = programs.convert
runprogram(convert.command, convert.argument, {
newname = newname,
oldname = oldname,
} )
end
tifconverter.pdf = converter
gifconverter.pdf = converter
bmpconverter.pdf = converter
gifconverter.default = converter
tifconverter.default = converter
bmpconverter.default = converter
-- todo: lowres
-- -- -- bases -- -- --
local bases = { }
local bases_list = nil -- index => { basename, fullname, xmlroot }
local bases_used = nil -- [basename] => { basename, fullname, xmlroot } -- pointer to list
local bases_found = nil
local bases_enabled = false
local function reset()
bases_list = allocate()
bases_used = allocate()
bases_found = allocate()
bases_enabled = false
bases.list = bases_list
bases.used = bases_used
bases.found = bases_found
end
reset()
function bases.use(basename)
if basename == "reset" then
reset()
else
basename = file.addsuffix(basename,"xml")
if not bases_used[basename] then
local t = { basename, nil, nil }
bases_used[basename] = t
bases_list[#bases_list+1] = t
if not bases_enabled then
bases_enabled = true
xml.registerns("rlx","http://www.pragma-ade.com/schemas/rlx") -- we should be able to do this per xml file
end
if trace_bases then
report_inclusion("registering base '%s'",basename)
end
end
end
end
local function bases_find(basename,askedlabel)
if trace_bases then
report_inclusion("checking for '%s' in base '%s'",askedlabel,basename)
end
basename = file.addsuffix(basename,"xml")
local t = bases_found[askedlabel]
if t == nil then
local base = bases_used[basename]
local page = 0
if base[2] == nil then
-- no yet located
for i=1,#figure_paths do
local path = figure_paths[i]
local xmlfile = path .. "/" .. basename
if io.exists(xmlfile) then
base[2] = xmlfile
base[3] = xml.load(xmlfile)
if trace_bases then
report_inclusion("base '%s' loaded",xmlfile)
end
break
end
end
end
t = false
if base[2] and base[3] then -- rlx:library
for e in xml.collected(base[3],"/(*:library|figurelibrary)/*:figure/*:label") do
page = page + 1
if xml.text(e) == askedlabel then
t = {
base = file.replacesuffix(base[2],"pdf"),
format = "pdf",
name = xml.text(e,"../*:file"), -- to be checked
page = page,
}
bases_found[askedlabel] = t
if trace_bases then
report_inclusion("figure '%s' found in base '%s'",askedlabel,base[2])
end
return t
end
end
if trace_bases and not t then
report_inclusion("figure '%s' not found in base '%s'",askedlabel,base[2])
end
end
end
return t
end
-- we can access sequential or by name
local function bases_locate(askedlabel)
for i=1,#bases_list do
local entry = bases_list[i]
local t = bases_find(entry[1],askedlabel)
if t then
return t
end
end
return false
end
function identifiers.base(data)
if bases_enabled then
local dr, du, ds = data.request, data.used, data.status
local fbl = bases_locate(dr.name or dr.label)
if fbl then
du.page = fbl.page
du.format = fbl.format
du.fullname = fbl.base
ds.fullname = fbl.name
ds.format = fbl.format
ds.page = fbl.page
ds.status = 10
end
end
return data
end
bases.locate = bases_locate
bases.find = bases_find
identifiers.list = {
identifiers.base,
identifiers.default
}
-- tracing
statistics.register("graphics processing time", function()
local nofprocessed = figures.nofprocessed
if nofprocessed > 0 then
return format("%s seconds including tex, %s processed images", statistics.elapsedtime(figures),nofprocessed)
else
return nil
end
end)
-- helper
function figures.applyratio(width,height,w,h) -- width and height are strings and w and h are numbers
if not width or width == "" then
if not height or height == "" then
return figures.defaultwidth, figures.defaultheight
else
height = todimen(height)
if w and h then
return height * w/h, height
else
return figures.defaultwidth, height
end
end
else
width = todimen(width)
if not height or height == "" then
if w and h then
return width, width * h/w
else
return width, figures.defaultheight
end
else
return width, todimen(height)
end
end
end
-- example of simple plugins:
--
-- figures.converters.png = {
-- png = function(oldname,newname,resolution)
-- local command = string.format('gm convert -depth 1 "%s" "%s"',oldname,newname)
-- logs.report(string.format("running command %s",command))
-- os.execute(command)
-- end,
-- }
-- local fig = figures.push { name = pdffile }
-- figures.identify()
-- figures.check()
-- local nofpages = fig.used.pages
-- figures.pop()
-- interfacing
commands.setfigurelookuporder = figures.setorder
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