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Topic: Re: Images to Ascii85 encoding for PDF
Conf: (P-PDF) Developers, Msg: 57479
From: picax
Date: 5/29/2002 05:26 PM

En/Na p-pdf-developer Listmanager ha escrit:
> From: "Amol"
> --- Planet PDF Forum | ----
> We are trying to encode the image (Logo) in Ascii85 format which can be used in PDF with ASCii85Decode filter.
> Does anyone know any encoder software which does this?
> Thanks
> Amol

Hi Amol,

With Acrobat Distiller or Ghostscript and some PostScript programming
can do this. Here is a little example:

%%% Encoding ...
100 string /StringEncoded exch def
StringEncoded /ASCII85Encode filter dup ( Hello A M O L !)
writestring flushfile

%%% Displaying the Encoded String ...
(\n\n) StringEncoded (\n\n) print flush print flush print flush

%%% Decoding ...
StringEncoded /ASCII85Decode filter 100 string readstring pop

%%% Displaying the Decoded String ...
(\n) print flush print flush (\n\n\n) print flush

Run this code in Acrobat Distiller ... e voila!

Also the Adobe PostScript Technical Note #5603 'Filters and Reusable
Streams' (in site) explains more accurately this encoding

Hope this helps,

Marc Antoni @:)
PostScript&PDF Tools Developers

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