home *** CD-ROM | disk | FTP | other *** search
- Path: ifi.uio.no!usenet
- From: ludvigp@ifi.uio.no (Ludvig Pedersen)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: doubling pixels horizontally
- Date: 4 Mar 1996 22:47:02 GMT
- Organization: Dept. of Informatics, University of Oslo, Norway
- Message-ID: <784.6637T1302T1269@ifi.uio.no>
- References: <782.6637T801T2378@dk-online.dk>
- NNTP-Posting-Host: gymir.ifi.uio.no
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP)
-
- >> Is this slow?
- >> ChangeVPBitMap(&MyScreen->ViewPort, ActiveBM, MyDBI);
- >No I don't think so... I tryed to use Snoopy on ChangeScreenBuffer() ( which
- >use ChangeVPBitMap(), and is the right way to make multi-buffering with
- >intuition screens). I also had Snoopy to notify me if MrgCop() or MakeVPort()
- >where called. When ChangeScreenBuffer is called the other two is not called.
- >So what I think happens when you call ChangeVPBitMap() is that i updates the
- >actual copperlist directly, and this is faaasst compared to the old way
- >(before OS3+ ) of multi-buffering!
- >btw. I also found out that NemacIV use ChangeScreenBuffer() - way to go!!!
-
- hmm...ok, I'll look at it. Thanks! :-)
-
-
-
- <sb>Ludde - Amiga Demo Coder
- <sb>Virtual Reality & Official Be developer
- <sb>ludvigp@ifi.uio.no
-
-