Displaying (large) bitmaps without flicker

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#2550

From: Cameron Bromley
Date: Thu, 07 Jan 1993 14:15

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Hi,

I'm doing some simple animation in my app.  I have an array of HBITMAPS which  
are displayed one after the other (on a WM_TIMER) using BitBlt.  The problem  
is, there is a noticable 'flicker' when the bitmaps are re-drawn, although in  
different spots.  It's hard to describe in words, but I'm pretty sure it's  
because the video retrace is happening right in the middle of the BitBlt.

In the bad old days (before Windows) you could query the video card hardware  
and wait for a re-trace to begin and then update the video ram, the end result  
being 'flicker free' graphics. 

Does anybody know the solution under Windows?

Thanks,

Cam.
-- 
---------------------------------------------------------------
Cameron Bromley                      Internet: cdb@codex.com.au
Codex Software Development Pty. Ltd. Fax +61-3-696-6757
PO Box 293, Albert Park, VIC, 3206   Australia

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Newsgroups: comp.os.ms-windows.programmer.misc
Path: arc1-ca.pugleaf.net!sparky!uunet!paladin.american.edu!howland.reston.ans.net!usc!rpi!batcomputer!munnari.oz.au!yarrina.connect.com.au!codex!cdb
From: cdb@codex.oz.au (Cameron Bromley)
Subject: Displaying (large) bitmaps without flicker
Message-ID: <1993Jan7.141531.650@codex.oz.au>
Sender: cdb@codex.oz.au
Organization: Codex Software Development Pty Ltd
Date: Thu, 7 Jan 93 14:15:31 GMT
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