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Coding

Started by AcoGL Feb 29, 2004 at 7:09 AM 8 replies 700+ views

Original Post

Feb 29, 2004 at 7:09 AM

Hi all! Does anybody know how do "pdf" standard filters work? I need to know more about compressions and decoders of this file type. These are: - ASCIIHexDecode filter - ASCII85Decode filter - LZWDecode filter - FlateDecode filter - RunLengthDecode filter - CCITTFaxDecode filter - DCTDecode filter Thanks for any kind of reply.

AcoGL

Author

AcoGL

Mar 1, 2004 at 9:24 AM

Is there someone who can advice me in finding information about mentioned codings?

Please help.

Cedric

Mar 1, 2004 at 9:29 AM

Have you tried Google?

debaere

Mar 1, 2004 at 10:36 AM

I am assuming you mean Adobe Portable Document Format? There are several open source programs that support PDF (xpdf, and OpenOffice.org come to mind). Downloading and reading the source should provide the answers you need.

If pdf means something else... ignore this message

Qw3r7yU10p!

Mar 1, 2004 at 10:54 AM

The PostScript interepreter handles the decoding so you don''t have to.

Do you have the PostScript Language Reference Manual (PLRM)? If not have a search for it.

AcoGL

Author

AcoGL

Mar 2, 2004 at 9:54 AM

Actually I need to write a program to export PDF (Adobe Portable Document Format) format to TXT. I need to decode encoded strings.

That''s why I need how codding works. If you know another way how to decode mentioned things without knowing it''s structure (already programmed functions or calls etc.) please let me know.

Thanks guys a lot for already posted replays.

Useless Hacker

Mar 2, 2004 at 10:33 AM

You know, you might get a better response if you gave a more descriptive thread title.

AcoGL

Author

AcoGL

Mar 2, 2004 at 11:00 AM

Thanks I''ll try.

George2

Mar 2, 2004 at 11:50 AM

On my linux box I have a program called pdftotext, which does just what you need, according to the man page you can find more info at
http://www.foolabs.com/xpdf/

[edited by - George2 on March 2, 2004 12:52:04 PM]

AcoGL

Author

AcoGL

Mar 3, 2004 at 2:18 PM

Thanks a lot George2! You helped me a lot.

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