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From: guineau@wjg.enet.dec.com (W. John Guineau)
Newsgroups: comp.sys.amiga.graphics
Subject: Re: Layers bug
Message-ID: <19236@shlump.nac.dec.com>
Date: 21 Jan 91 21:04:46 GMT
References: <18901@shlump.nac.dec.com> <17628@cbmvax.commodore.com>
Sender: newsdaemon@shlump.nac.dec.com
Reply-To: guineau@wjg.enet.dec.com
Organization: Digital Equipment Corporation, Marlboro, MA
Lines: 62

In article <17628@cbmvax.commodore.com>, spence@cbmvax.commodore.com
(Spencer Shanson) writes:

|> 
|> In article <18901@shlump.nac.dec.com> guineau@wjg.enet.dec.com (W.
|> John Guineau) writes:
|> >
|> >I know there is a bug in the layers.library stuff that causes
|> things
|> >to get real slow when you have lots of windows/movement/sizing.
|> >
|> >I have 2 questions:
|> >
|> >	1. Could someone give me a better description of exactly what
|> >		and where the bug is?
|> This isn't so much a bug, more a side-effect of allowing overlapping
|> windows.
|> The more windows you have overalapping, the mor cliprects need to be
|> built
|> and maintained. ClipRects are the 'sleight of hand' the OS uses to
|> maintain
|> hidden and overlapping pieces of windows. The more you have, the more
|> work
|> needs to be done. This is especially true when moving and resizing as
|> new
|> cliprects need to be built, old ones coalesced (to optimise) and
|> hidden parts
|> redrawn. We are aware of the speed hit with large numbers of windows,
|> and
|> are currently looking into the problem.


So this effect is still in 2.0? Has it been alleviated at all?


|> >
|> > 	2. Is there a workaround (other than WB 2.0 or not using lots
|> >		of windows!)
|> >
|> If this really is a problem for you, try to avoid overlapping your windows
|> so much. Apart from that, you could either buy a faster machine, or wait
|> until we have fixed the problem here. Sorry :-(

Gee, I already have a 28mhz 68030 and lots of ram (7 meg)...

Seriously, I appreciate the info. Hopefully 2.0 will look so nice that this
layers feature will not be so apparent :-) 


|> -- 
|> ---------------------------------------------------------------------------
|> Spencer Shanson - Amiga Software Engineer     | email: spence@commodore.COM
|>                                               | or uunet!cbmvax!spence
|> All opinions expressed are my own, and do not | "A picture is worth 1000
|> (necessarily) represent those of Commodore.   | words, or about 300,000
|>                                               | bytes."
|> 

--                			
W. John Guineau                         grep meaning life | more
Digital Equipment Corporation		
guineau@wjg.enet.dec.com   or   wjg@wpi.wpi.edu