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From: beo@maestro.htsa.aha.nl (BeO de PeO)
Newsgroups: comp.sys.amiga
Subject: Re: GIF to IFF
Message-ID: <1262@maestro.htsa.aha.nl>
Date: 15 Dec 89 09:27:14 GMT
References: <637@tau.sm.luth.se> <5422@wpi.wpi.edu> <4186@nigel.udel.EDU> <00342@sarek.UUCP>
Reply-To: beo@maestro.htsa.aha.nl (BeO de PeO)
Organization: AHA-TMF (Technical Institute), Amsterdam, The Netherlands
Lines: 37
Organization:

In article <00342@sarek.UUCP> gsarff@sarek.UUCP (Gary Sarff) writes:
>In article <4186@nigel.udel.EDU>, new@udel.edu (Darren New) writes:
>>In article <5422@wpi.wpi.edu> jdutka@wpi.wpi.edu (John Dutka) writes:
>>>There is a program, called gif2iff, that will do this for you.  It comes
>>>with two programs, giftotmp, and tmptoiff.  It works ok, but it chokes on
>>>GIFS that are bigger than the Amiga screen.
>>
>GIFtoTMP does have a problem with GIF files that are stored interlaced.  This
>is not the same thing as amiga interlaced video or anything like that.  The
>GIF file will store (I may have the details wrong), every 8th line of the
>picture, then every 4th, every 2nd then all the odd ones, (may be other
>schemes too)

The sequence is: every 8 lines starting with line 0, then every 8 lines
starting with line 4, then every 4 lines, starting with line 2, and to
finish, every 2 lines, starting with line 1.

About (inter)laced, If everything's ok, there is a file with Gif2Iff called 
'Unlace'. This will convert a laced TmpFile into a non-laced TmpFile.
Unfortunately this will only work with Gifs which are 320 pixels wide.
This made me write this program again. If someone wants it: email to:
beo@maestro.htsa.aha.nl ! (Beware, it _is_ a 'bare-bones' version :^)

About choking on large pics... Erm, I dunno ....

What I don't like about GifToTmp and TmpToIff, is the handling of 
errors, especially Diskfull errors. 
But what the H#ck, I didn't write it, so there will be always something
_I_ don't like .... :^)
-- 
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 /   \ /   \   |  It's a funny ol' world, eh ?     |
|   o |   o |  |                      Alexei Sayle |
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   | ____\  | Jan van Veen, beo@maestro.htsa.aha.nl, Amsterdam, Netherlands  |
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