Re: Was: Opening external documents ... -> Can ConTeXt reduce size of images?

From: Hans Hagen <pragma@wxs.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Cc: Matthias Weber <matweber@indiana.edu>
Subject: Re: Was: Opening external documents ... -> Can ConTeXt reduce size of images?
Date: Wed, 09 Jan 2013 00:30:16 +0100	[thread overview]
Message-ID: <50ECAC08.9060400@wxs.nl> (raw)
In-Reply-To: <A09FB76C-890C-4E32-8C93-F54438C07261@indiana.edu>

On 1/9/2013 12:04 AM, Matthias Weber wrote:
> Thanks Hans,
>
> I'll give this a try when I am in a daring mood and less busy.

the latest beta has this:

% \enabletrackers[graphics.programs]

\starttext

     \externalfigure[cow.pdf][conversion=stripped]

\stoptext

Of course I cannot guarantee that the pdf gets stripped, but at least 
it's tried.

> Matthias
>
> On Jan 7, 2013, at 8:09 PM, Hans Hagen <pragma@wxs.nl> wrote:
>
>> On 1/8/2013 1:00 AM, Matthias Weber wrote:
>>
>>> So, this clearly is not a  ConTeXt problem. But it causes me major headaches. In my workflow, I have dozens of images
>>> that I prepare with Adobe Illustrator and save as pdf files that are still editable with Illustrator, i.e. that include another copy of the
>>> file with layers etc. In other words, my pdf images are about 10 times as big as they need to be. I usually just reduce the file size with preview.
>>> As this seems to be erroneous now, I am wondering:
>>
>> it's even worse ... all kind of color and other data is present is such a file .. the pstopdf.rb script (comes with mkii) gets rid of some of that
>>
>> normally at pragma we do such things either automatically (when graphics are put in repositories) or with acrobat in batch mode (doable if you get the graphics in advance) because doing such thing smanually for thousands of images is no fun
>>
>> you can play with this:
>>
>> \startluacode
>> local gsp = os.type == "windows" and "gswin32c" or "gs"
>> local gsc = "%s -q -dEPSCrop -sDEVICE=pdfwrite -dNOPAUSE -dSAFER -dNOCACHE -dBATCH -dProcessColorModel=/DeviceCMYK -sOutputFile=%s %s -c quit"
>> local pdp = "pdftops -eps %s %s"
>>
>> figures.converters.pdf = {
>>     xxx = function(oldname,newname)
>>         local tmpname = oldname .. ".ps"
>>         local command = string.format(pdp,oldname,tmpname)
>>         os.execute(command)
>>         local command = string.format(gsc,gsp,newname,oldname)
>>         os.execute(command)
>>     end
>> }
>>
>> figures.registersuffix("xxx","pdf")
>> \stopluacode
>>
>> \starttext
>>
>> \externalfigure[cow.pdf][conversion=xxx]
>>
>> \stoptext
>>
>> pdftops comes with xpdf (also in minimals)
>>
>> if needed I can add a standard converter for it
>>
>> 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
>> -----------------------------------------------------------------
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>
> ___________________________________________________________________________________
> 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
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> ___________________________________________________________________________________
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-- 

-----------------------------------------------------------------
                                           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
___________________________________________________________________________________