comp.lang.postscript Google Group

Re: PDF to eps preserving pantone colors

abed...@hotmail.com (abeddie@hotmail.com) — Thu, 07 Jan 2010 14:45:09 UT

On Dec 29 2009, 6:23 pm, "Jeffrey H. Coffield"
Using Acrobat Reader seemed to preserve to spot color but g smay have
options.
Ed
% create PostScript file including color PANTONEFF where .5 magenta is
alternate color
[ /Separation (PANTONEFF) /DeviceCMYK { pop 0 .5 0 0 } ] setcolorspace
% convert to PDF with ps2pdf and PDF has:

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531...@gmail.com (garrrik) — Wed, 06 Jan 2010 11:18:14 UT

Re: PDF to eps preserving pantone colors

deedub...@gmail.com (Dave) — Wed, 06 Jan 2010 01:30:30 UT

On Dec 29 2009, 3:23 pm, "Jeffrey H. Coffield"
So you want to end up with spot colors, i.e. colors in the /Separation
color space (which is a special case of DeviceN) in the output EPS?
I think it's legal but I don't know if GS will support it. The
documentation ([link])

PDF to eps preserving pantone colors

jeff...@digitalsynergyinc.com (Jeffrey H. Coffield) — Tue, 29 Dec 2009 23:23:01 UT

I am looking for a way to automate converting a 4 page PDF that contains
Pantone colors into 4 eps files (one for each page) and preserve the
Pantone color hopefully using GhostScript. The epswrite with a %d in the
output file name give me the eps files but the Pantone calls are gone.

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muiwuzf...@gmail.com (ghghjjj) — Mon, 21 Dec 2009 01:24:32 UT

Re: ghostscript to make thumbnails?

nospam-ab...@ilyaz.org (Ilya Zakharevich) — Sun, 20 Dec 2009 19:37:53 UT

^^^^^^^^^^^
I think you meant "downscaling", not "subsampling". The way good
applications do downscaling is more like "supersampling" than
"subsampling".
============================== =========================
Anyway, one should be aware even with that. E.g., doing Fourier
analysis, imagemagicks default downscaling (sinc, IIRC) gives almost

Re: ghostscript to make thumbnails?

k...@spamcop.net (ken) — Sun, 20 Dec 2009 15:59:59 UT

In article <OZCdnYeGR5A_nbPWnZ2dnUVZ8jVi4 ...@brightview.co.uk>,
bugbear@trim_papermule.co.uk_t rim says...
Hmmm. The crop function shouldn't affect the resolution, just the
PageSize. If you select fixed media and set the resolution then using
any of the 'fit' opetions should cause the file to be scaled as erquired

Re: ghostscript to make thumbnails?

bugb...@trim_papermule.co.uk_trim (bugbear) — Sun, 20 Dec 2009 10:46:58 UT

ken wrote:
I'm actually trying to make "good" thumbnails for inputs
of widely varying size and aspect ratio.
In terms of quality of output, this could be achived by simply using
an arbitrarily high rendering resolution, -dEPSFCrop (in the cas of EPS)
and then using ImageMagick to subsample.
But for large inputs (e.g. posters, broadsheet newspaper cente spreads)

Re: ghostscript to make thumbnails?

k...@spamcop.net (ken) — Fri, 18 Dec 2009 15:42:26 UT

In article <6MKdnY4LUtpn7bbWnZ2dnUVZ7ridn ...@brightview.co.uk>,
bugbear@trim_papermule.co.uk_t rim says...

The seems (to me, maybe I'm mis-understanding) to do what the fit stuff
is supposed to do. It compares the width and height requested against
the width and height of the media, and selects the smallest scale factor

Re: ghostscript to make thumbnails?

bugb...@trim_papermule.co.uk_trim (bugbear) — Fri, 18 Dec 2009 12:09:29 UT

ken wrote:
Thanks for that - I was considering (also) altering the gs_epsf.ps
and pdf_main.ps (where PDFFitPage and EPSFitPage are implemented)
and adding a new variation.
Cowardice may prevent me... ;-)
The behaviour I want can be nicely specified as
widthxheight
per this language:
[link]