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. 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, 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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