Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uunet!mcsun!ukc!dcl-cs!gdt!gdr!mapjilg
From: mapjilg@gdr.bath.ac.uk (J I L Gold)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Double-Buffering in a window
Message-ID: <1990Jan10.134148.21435@gdt.bath.ac.uk>
Date: 10 Jan 90 13:41:48 GMT
References: <897@mindlink.UUCP>
Reply-To: mapjilg@gdr.bath.ac.uk (J I L Gold)
Organization: University of Bath, England
Lines: 20

In article <897@mindlink.UUCP> a464@mindlink.UUCP (Bruce Dawson) writes:
>
>     All of the windows in a screen share the same bitmap (at least for their
>visible portions, which is what you're interested in).  So, if you want to
>double buffer one window, you've got to double buffer all of them.  The entire
>screen gets flipped all at once.  So, unless you first copy the contents of the
>entire screen to the hidden buffer, the other windows are going to flashing on
>and off as you flip bitmaps.
>

However you do have access to the layers through CopySBitMap() and SyncSBitMap()
which I'm reliably informed do the job nicely!
-- 
J.Gold | mapjilg@uk.ac.bath.gdr

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