# Re: [NTG-context] Use figures without file extension

On Sat, May 26, 2012 at 4:23 PM, Hans Hagen <pra...@wxs.nl> wrote:
> On 26-5-2012 16:04, Aditya Mahajan wrote:
>>
>> On Sat, 26 May 2012, Hans Hagen wrote:
>>
>>> On 26-5-2012 04:08, Aditya Mahajan wrote:
>>>>
>>>> Currently, ConTeXt only recognizes the type of figure from the file
>>>> extension. If a filename does not have an extension, \externalfigure
>>>> fails.
>>>>
>>>> For example:
>>>>
>>>> \$ cp luatools hacker.jpg something
>>>
>>>
>>> ah .. i see, no extension .. too tricky to support that as they we'd
>>> need to run an identify on the image which is probably not what we want
>>
>>
>> However adding method=jpeg works, even if the image is not a jpeg!
>>
>>> i've made a simple 'identify' but am yet unsure how to use that in the
>>> current lookup strategy (as i want to avoid too much overhead ...
>>> using images without suffix is bad anyway)
>>
>>
>> I am using a script to typeset rss feed to a pdf for reading on kindle.
>> Some blog engines (e.g. typepad) do not set an extension for the image.
>> As such, I cannot control the input. For the moment, I am using a
>> workaround:
>>
>> \let\normalexternalfigure\externalfigure
>> \unexpanded\def\externalfigure
>>
>> {\normalexternalfigure[#1][\c!scale=2000, \c!method=JPEG, #2]}}
>>
>> Notice the method=JPEG.
>>
>> But, I think that I'll need to wrap a custom wrapper anyways, and some
>> pages contain gif images which cause luatex to crash.
>
>
> I'll add a virtual type 'auto':
>
> \externalfigure[yourname.auto]
This can be interesting
http://www.garykessler.net/library/file_sigs.html

--
luigi
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