Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!psuvax1!rutgers!cbmvax!cbmehq!cbmger!peterk
From: peterk@cbmger.UUCP (Peter Kittel GERMANY)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Need help with IFF RLE compression.
Message-ID: <1126@cbmger.UUCP>
Date: 18 Apr 91 06:46:54 GMT
References: <1991Apr15.080653.772@kberg.se>
Reply-To: peterk@cbmger.UUCP (Peter Kittel GERMANY)
Organization: Commodore Bueromaschinen GmbH, West Germany
Lines: 24

In article <1991Apr15.080653.772@kberg.se> svante@kberg.se (Svante Gellerstam) writes:
>
> I need to add the
>cmpByteRun algorithm.
>
>I have reinvented the wheel once more and implemented it myself. The
>problem is the output. Mostra likes it, DPaint likes it, PageSetterII
>likes it. ADPro and TAD says 'error in BODY'. Another program eats the
>file but messes up after three lines.
>
>I compress the BODY one row at a time. The multilevel data is
>converted from byte to plane organization and then fed into the
>compress routine. 

This is ok. To be precise, you must compress one line of the 1st
bitmap, then the same line of 2nd bitplane and so on.

One thing I came across that perhaps some software needs the byte
stream padded to an even number of bytes on a line, but this is only
a suspicion, can't prove it.

-- 
Best regards, Dr. Peter Kittel  // E-Mail to  \\  Only my personal opinions... 
Commodore Frankfurt, Germany  \X/ {uunet|pyramid|rutgers}!cbmvax!cbmger!peterk