On 3/22/2017 9:30 AM, Procházka Lukáš Ing. wrote:
Hello,
a bit surprisingly no response so far.
Does it mean that no such a function exists?
If so, are there any Lua tables which provide list of current searching
paths and list of image extensions which ConTeXt handles? (In both
cases: in the place of use, as e.g. list of paths may change during use
of \(setup)externalfigure(s) at various places in the source document.)
Joseph mentioned 'figures.path' for paths;
is there something similar for valid image extensions (like
figures.extensions')?
If not, would it be possible to provide something like this?
- Just to explain: I need to perform some ops before inserting an image
via \externalfigure. And I would need to be able to locate the file to
be inserted, even when the picture is inserted by just a file name (with
no path) with path specified before by \setupexternalfigures.
manipulation plugins have been available for quite a while, just look
into grph-con.lua for examples (the test suite has some converter
examples too)
Hans
Best regards,
Lukas
On Tue, 21 Mar 2017 08:50:18 +0100, Procházka Lukáš Ing. <l...@pontex.cz>
wrote:
Hello Joseph,
thank you for reaction.
I guess:
- "figures.path' is a ConTeXt variable, is it?
- There are more extensions possible, not only .pdf. So how to access
other extensions Ctx is to manage?
- I guess that 'lpdf.epdf.load(figure_file)' is just a .pdf loader -
how to load other pics (like .png, .jpg, .svg...)?
Best regards,
Lukas
On Mon, 20 Mar 2017 09:34:19 +0100, <josephcan...@gmail.com> wrote:
Hi,
Personally I use the lua variable named : figures.path
It’s a lua table which contains directories names you provide in
directory= in \setupexternalfigures:
for _, path in ipairs(figures.paths) do
local figure_file = path .. '/' .. file
local doc = lpdf.epdf.load(figure_file) -- assume pdf (just an
example)
if doc then
….
end
done
There are perhaps helper functions as well.
Joseph
De : Procházka Lukáš Ing.
Envoyé le :lundi 20 mars 2017 09:27
À : ConTeXt
Objet :[NTG-context] \externalfigure locator
Hello,
is there a Lua version of external figure locator used by
\externalfigure?
Suppose having:
----
\setupexternalfigures[location={default,local,global},directory={../../Pics}]
\externalfigure[mill] % Finds e.g. in
d:\Ctx-Beta\tex\texmf-context\tex\context\sample\common\mill.png
\externalfigure[MyPrettyPicture.jpg] % Finds e.g. in
c:\Lukas\Pics\MyPrettyPicture.jpg
----
And I need a function like:
----
\startluacode
local path
path = assert(ExternalFileLocator("mill") ==
"d:/Ctx-Beta/tex/texmf-context/tex/context/sample/common/mill.png")
path = assert(ExternalFileLocator("MyPrettyPicture.jpg") ==
"c:/Lukas/Pics/MyPrettyPicture.jpg")
\stopluacode
----
So what to use in place of "ExternalFileLocator()"?
TIA.
Best regards,
Lukas
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