[NTG-context] Re: .jpx and .jxl

[Jim <zlists+context@jdvb.ca>]

On Tue, Mar  5, 2024 at 15:18 (+0100), Taco Hoekwater wrote:


>> On 4 Mar 2024, at 15:30, Jim <zlists+context@jdvb.ca> wrote:

>> Recently I've been trying to make some PDFs smaller by using better
>> compression of JPEG pictures.

>> I was happy to see that \externalfigure cheerfully accepts .jp2 (JPEG 2000)
>> files.  However, my understanding (and I could well be wrong, but I've seen
>> it multiple places) is that JPEG 2000 *Part 2* files should have extension
>> .jpx, not .jp2.

>> By default, ConTeXt does not recognize .jpx.  But if I rename a .jpx file
>> to have a .jp2 extension, then ConTeXt properly processes the file and I
>> see the picture in the PDF.

>> Q: are there any plans to make ConTeXt recognize the .jpx extension?
>> If not, can anyone suggest some ConTeXt code which allows me to tell
>> ConTeXt to process a .jpx file as a .jp2 file?


> The recognised extensions are specified in a table in grph-inc.lmt, I don’t 
> think you can alter that table runtime. 

> But it is possible to do

>   \externalfigure[method=jp2,file=….jpx]

> Untested, but should work.

Taco,

I could not get that to work, but I did get
        \externalfigure[somefile.jpx][method=jp2]
to work.  Thanks very much for leading me to that solution.

                        Jim

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________