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Re: Ghostscript pickling settransfer

From ken <ken@spamcop.net>
Newsgroups comp.lang.postscript
Subject Re: Ghostscript pickling settransfer
Date 2015-05-15 15:37 +0100
Message-ID <MPG.2fc014f2cf677fc9898fa@usenet.plus.net> (permalink)
References (5 earlier) <MPG.2f9add8b434bffa39898eb@usenet.plus.net> <3934ebd5-4761-4622-86e7-88659475adb3@googlegroups.com> <MPG.2f9c40dfc725ee159898ec@usenet.plus.net> <71f08c9a-b241-466b-bb2d-462029ab1b3c@googlegroups.com> <db2c3a8f-f4a3-4624-824b-11aeeca3fab4@googlegroups.com>

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In article <db2c3a8f-f4a3-4624-824b-11aeeca3fab4@googlegroups.com>, 
jdawiseman@gmail.com says...
> 
> I have just discovered, in 'Adobe Acrobat 7.0.5 Acrobat Distiller Parameters, 2 Oct 2005', page 92, the parameter TransferFunctionInfo. 
> > Determines how Distiller handles transfer functions, which are traditionally used to compensate for dot gain or dot loss that may occur when an image is transferred to film. For example, a file that is intended for output on a particular imagesetter may contain transfer functions that compensate for the dot gain inherent with that printer.  Valid values are: 
> > Preserve
> > Distiller preserves (passes into the PDF file) transfer functions.
> > Remove
> [...]
> > Apply
> > Distiller uses the transfer function to modify the data it writes to the PDF file, instead of writing the transfer function itself to the file. This value is ignored by Distiller 4.0 but supported by Distiller 5.0 and later. It is sometimes used to achieve artistic effects (although the PostScript Language Reference discourages such usage).
> 
> Apply seems to be 'Pickle'. Hurray! Does Ghostscript heed TransferFunctionInfo?
 
That's the same as setting it from the Distiller user interface.

So the answer is still 'No', the pdfwrite device always writes transfer 
functions into the grpahcs state, it never applies them.

	Ken

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Thread

Ghostscript pickling settransfer jdaw1 <jdawiseman@gmail.com> - 2015-04-14 14:01 -0700
  Re: Ghostscript pickling settransfer ken <ken@spamcop.net> - 2015-04-15 08:15 +0100
    Re: Ghostscript pickling settransfer jdaw1 <jdawiseman@gmail.com> - 2015-04-15 01:45 -0700
      Re: Ghostscript pickling settransfer ken <ken@spamcop.net> - 2015-04-15 10:04 +0100
        Re: Ghostscript pickling settransfer jdaw1 <jdawiseman@gmail.com> - 2015-04-17 01:35 -0700
          Re: Ghostscript pickling settransfer ken <ken@spamcop.net> - 2015-04-17 10:07 +0100
            Re: Ghostscript pickling settransfer jdaw1 <jdawiseman@gmail.com> - 2015-04-18 02:01 -0700
              Re: Ghostscript pickling settransfer ken <ken@spamcop.net> - 2015-04-18 11:23 +0100
                Re: Ghostscript pickling settransfer jdaw1 <jdawiseman@gmail.com> - 2015-04-25 15:06 -0700
                Re: Ghostscript pickling settransfer jdaw1 <jdawiseman@gmail.com> - 2015-05-15 06:37 -0700
                Re: Ghostscript pickling settransfer ken <ken@spamcop.net> - 2015-05-15 15:37 +0100
                Re: Ghostscript pickling settransfer Carlos <angus@quovadis.com.ar> - 2015-05-15 19:45 +0200
                Re: Ghostscript pickling settransfer ken <ken@spamcop.net> - 2015-05-16 09:03 +0100

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