On 21-10-2011 11:54, John Devereux wrote:
Hi all,
Is there a way to have context automatically compress or resample
included images to a given output resolution? I have not been following
recent developments...
I can obviously "pre-reduce" all images to the desired dpi. But:
1) This is a bit of work (and hard to get non-technical people to do)
2) In 5 years time we might want the images to be higher resolution and
not be as concerned about PDF size. But the information will be lost (or
be elsewhere).
So a command line or document setting would be ideal, is there such a
thing? \setpdfimageresolution[300dpi].
You can plug in a converter:
\startluacode
figures.converters["png"] = {
["lowres.png"] = function(oldname,newname,resolution)
os.execute(string.format('gm convert -depth 1 "%s"
"%s"',oldname,newname))
end,
}
-- the following is automatic in next beta
figures.suffixes["lowres.png"] = figures.suffixes.png
\stopluacode
And then use:
\starttext
\externalfigure[mill.png][conversion=lowres.png]
\stoptext
downsamples images are cached so the overhead is minimal
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
