From: "Dana Skovsende" <d.skovsende@techotel.dk>
Newsgroups: alt.comp.borland-delphi
References: <tjk8gim4rpt80c@corp.supernews.co.uk>
Subject: Re: Delphi 6 flickers when using TImage.Picture.Bitmap.Assign(TBitmap); ok in Delphi 3
Lines: 33
Message-ID: <YbE_6.208$Sg5.7260@news.get2net.dk>
Date: Thu, 28 Jun 2001 13:10:24 +0200
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Xref: cyclone.swbell.net alt.comp.borland-delphi:14538

Use DoubleBuffered := True;

Dana

"Paul" <z@z.z> skrev i en meddelelse
news:tjk8gim4rpt80c@corp.supernews.co.uk...
> Hi folks
>
> I've just moved up from Delphi 3 to Delphi 6, but have found that where I
> use a line like
>
>     // doodle on a bitmap (bmp: TBitmap) in memory
>     // ...
>     // now assign it to the TImage (img1) displayed on the form:
>     img1.Picture.Bitmap.Assign(bmp);
>
> to animate an image, I now get bad flickering.  This used to work fine
with
> Delphi 3, so has something changed (such as an additional property I need
to
> set to get the old behaviour back), or is it time to come up with a new
> technique?
>
> Cheers
>
> Paul
>
> paul.jaggard@musicradio.removethisbit.com


==========================================================

Cheers

I've tried this and it works, but it really really slows things down (from
5% CPU time to 90%).

Another one I've since found is to set TImage.Stretch := True, which cures
the flicker without hammering the machine, but this may just be a lucky
coincidence.

Thanks

Paul.