Re: [NTG-context] Image compression/resizing in PDFs
On 24-10-2011 16:29, Aditya Mahajan wrote: downsamples images are cached so the overhead is minimal Is caching based only on the figure name? If I change the original figure, will the cached figure be updated? Sure, local oldtime = lfs.attributes(oldname,'modification') or 0 local newtime = lfs.attributes(newname,'modification') or 0 if newtime == 0 or oldtime > newtime then In fact it's just integration of old resource library code (ruby stuff that happened between runs). 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 ___
Re: [NTG-context] Image compression/resizing in PDFs
downsamples images are cached so the overhead is minimal Is caching based only on the figure name? If I change the original figure, will the cached figure be updated? Aditya ___ 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 ___
Re: [NTG-context] Image compression/resizing in PDFs
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
___
Re: [NTG-context] Image compression/resizing in PDFs
On Fri, Oct 21 2011, John Devereux wrote: > Is there a way to have context automatically compress or resample > included images to a given output resolution? Hello, See also http://archive.contextgarden.net/thread/20110629.173015.6dcd7b3e.en.html t-degrade.tex is broken with latest context. If you fix it (should be easy), please send me the patch! :-) (Sorry, too busy now for fixing it myself...) -- Peter ___ 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 ___
[NTG-context] Image compression/resizing in PDFs
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]. Thanks, -- John Devereux ___ 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 ___
