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Topic: RE: RunLengthDecode and CCITTFaxDecode filters
Conf: (P-PDF) Developers, Msg: 58410
From: skajan
Date: 5/29/2002 05:32 PM

Thanks a Lot

-----Original Message-----
From: p-pdf-developer Listmanager
Sent: 11 October 2001 12:32
To: Recipients of 'p-pdf-developer' suppressed
Subject: Re: RunLengthDecode and CCITTFaxDecode filters

From: Marc Antoni Malagarriga i Picas

--- Planet PDF Forum | ----

En/Na p-pdf-developer Listmanager ha escrit:
> From: "shan"
> --- Planet PDF Forum | ----
> Hi Genies
> I would like to help on RunLengthDecode and CCITTFaxDecode filters. As we
> found some free libraries (ZLIB) available for Flate filter, are there any
> standard libraries available for the above filters.
> Can someone please direct me to some source or interesting links.
> Thanks in advance
> Shan

Hi Shan,

This is a simple PostScript RunLength Encode/Decode string (ShanShan)
example merged with ASCIIHex Encode/Decode filter for 'prompt
visibility' purposes. Run this code in Acrobat Distiller and Voila!

%%% Encoding ...
65535 string /StringEncoded exch def
StringEncoded 0 /RunLengthEncode filter /ASCIIHexEncode filter dup
(ShanShan) writestring flushfile

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

%%% Decoding ...
StringEncoded /RunLengthDecode filter
/ASCIIHexDecode filter 65535 string readstring pop

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

Hope this helps,

(][ MaRC anToni
PostScript&PDF Tools Developers

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