Problems with built-in LZW image compression code

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#215

From: Comrade D
Date: Fri, 24 Jul 1992 03:00

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Help!  It seems LZW image compression under 2.1 is faulty.  I have
encountered several images that won't reopen when saved using LZW,
like so:

    [bitmap writeTIFF:s usingCompression:NX_TIFF_COMPRESSION_LZW
        andFactor:10.0];

I get messages like so:

    TIFF Error: LZWDecode: Not enough data for scanline 259 (decode 1249 
bytes).

Has anyone else encountered this, and if so, please tell me there's a
patch for this under 2.1.


Please e-mail me at dylan@angst.com,
thanks in advance.

        --Dylan

P.S.  Has anyone else noticed JPEG under 2.1 has problems saving
images with large regions of pure red in them?  It changes it to green.



-------------------------------------------------------------------
Dylan Kohler
dylan@angst.com     (NeXTmail welcome)

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Path: arc1-ca.pugleaf.net!sparky!uunet!sun-barr!cs.utexas.edu!usc!sdd.hp.com!elroy.jpl.nasa.gov!midiline!dylan
From: dylan@midiline.la.ca.us (Comrade D)
Newsgroups: comp.sys.next.programmer
Subject: Problems with built-in LZW image compression code
Message-ID: <cJBeoB2w165w@midiline.la.ca.us>
Date: Thu, 23 Jul 92 20:00:23 PDT
Organization: MIDILine BBS - Altadena, CA - (818) 797-3285
Lines: 31