home *** CD-ROM | disk | FTP | other *** search
- Path: news.eunet.fi!fipnet!kone!jsaarinen
- Newsgroups: comp.sys.amiga.programmer
- X-NewsReader: IntuiNews 1.2b (31.7.94)
- References: <38231819@kone.fipnet.fi> <4cgsn7$ke3@maureen.teleport.com> <38231852@kone.fipnet.fi> <4ck41j$a9a@serpens.rhein.de>
- From: "Jyrki Saarinen" <jsaarinen@kone.fipnet.fi>
- Date: Sat, 6 Jan 96 16:38:14 UT
- Comments: Illegal date header - new date added by quicknews
- X-Original-Date: Sat, 06 Jan 96 17:30:33
- MIME-Version: 1.0
- Content-Type: text/plain; charset=iso-8859-1
- Content-Transfer-Encoding: binary
- Subject: Re: Demo/game to OS friendly part II
- Message-ID: <38231887@kone.fipnet.fi>
-
-
- > I'm not sure whether ScrollVPort() with different BitMaps is
- > supported on anything else than the native graphics either.
- > If it would be supported it could be pretty slow if a bitmap
- > has to be swapped from fast memory to the card.
- >
- > Opening a screen with twice the height or width and using
- > ScrollVPort() to change the displayed region might be
- > compatible with more graphics cards. With only one BitMap
- > it should be guaranteed that no data has to be copied.
- >
- > So I'd try the double buffer functions and if that fails
- > resort to one of the kludges below.
-
- Hmm. If ScrollVPort() works on CyberGraphX, too, it
- would be the perfect solution to get triple buffering.
-
- I suppose it has quite a low overhead.. At least I recall
- ScrollVPort() being in the list of functions which
- were greatly optimized in v39.
-
- -- _
- a Stellar programmer _ //
- "Amiga - back for the future" \X/
-