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From: carolyn@cbmvax.cbm.UUCP (Carolyn Scheppner CATS)
Newsgroups: comp.sys.amiga
Subject: Re: Darn non-multitasking IFF viewers
Message-ID: <2004@cbmvax.cbmvax.cbm.UUCP>
Date: Thu, 11-Jun-87 11:27:14 EDT
Article-I.D.: cbmvax.2004
Posted: Thu Jun 11 11:27:14 1987
Date-Received: Sat, 20-Jun-87 12:36:10 EDT
References: <8706090134.AA03008@cogsci.berkeley.edu>
Reply-To: carolyn@cbmvax.UUCP (Carolyn Scheppner CATS)
Organization: Commodore Technology, West Chester, PA
Lines: 29

In article <8706090134.AA03008@cogsci.berkeley.edu> bryce@COGSCI.BERKELEY.EDU (Bryce Nesbitt) writes:
>
>Ok, I'm upset.  I just went through three, count them, THREE IFF viewers.
>ALL of them hogged processor time while displaying the picture.  This is
>hard to do with the Amiga.  They must have really worked at it!!
>
>Having all three viewers do this is odd.  Perhaphs a bug in the IFF routines
>from Electronic Art/Amiga??

   That's probably my fault.  My first IFF viewer (SeeILBM) had to be
thrown together very quickly so that we would have a pull-down-able
screen viewer on the second release of the IFF stuff (because the EA
supplied viewer ShowILBM had some problems when started from Workbench
because it used a ViewPort rather than a screen).  Anyway, I grabbed
some old screen/window code from my first Amiga program and patched
it into ShowILBM to create SeeILBM.  That old code contained some rather
stupid mistakes, one of which caused it to busywait.  There are probably
other viewers floating around based on this early example.

   Any one who is writing code to handle ILBM's should get the latest
IFF release (Fish #64) and look at the non-busywaiting HAM-capable
(and color-cycling) viewer "Display".   

-- 
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Carolyn Scheppner -- CBM   >>Amiga Technical Support<<
                     UUCP  ...{allegra,caip,ihnp4,seismo}!cbmvax!carolyn 
                     PHONE 215-431-9180
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