Article View: comp.sys.acorn.tech
Article #437Re: Flicker-free Icon updating
From: Philip Richard Banks
Date: Mon, 28 Sep 1992 19:56
Date: Mon, 28 Sep 1992 19:56
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1429 bytes
In article <1992Sep28.140636.11131@odin.diku.dk> torbenm@diku.dk (Torben AEgidius Mogensen) writes:
>You could try waiting for the vertical sync before updating. In Basic
>this is done by WAIT, but there is an Os_Byte call (I don't recall the
>number) that has the same effect.
It is an OsByte 19 that waits for Vsync. The only problem I have found with
this is that having the window up near the top of the screen still causes
flickers. The simple answer I think is that you can't avoid flicker entirely
in the Wimp, merely lessen it's noticability...
Philip
--
Philip R. Banks pbanks@comp.vuw.ac.nz (An Arc owner with a mission) @@@@@/|
(Quite what mission I am not too sure yet. But I do have one!) @@@@/#|
"There may be an om in moment,but there's very few folk in focus!" @@@/--|
--'Hallowed be thy Name' by Emerson,Lake & Palmer. @@/###|
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Newsgroups: comp.sys.acorn.tech Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!comp.vuw.ac.nz!pbanks From: Philip.Banks@comp.vuw.ac.nz (Philip Richard Banks) Subject: Re: Flicker-free Icon updating Nntp-Posting-Host: cantina.comp.vuw.ac.nz Message-ID: <BvB0pD.Cu9@comp.vuw.ac.nz> Organization: Dept. of Comp. Sci., Victoria Uni. of Wellington, New Zealand. Sender: news@comp.vuw.ac.nz (News Admin) References: <92272.103620SMARTIN@ESOC.BITNET> <1992Sep28.140636.11131@odin.diku.dk> Date: Mon, 28 Sep 1992 19:56:01 GMT Lines: 18