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- Path: www.cybercity.dk!usenet
- From: ccc6004@vip.cybercity.dk (Hans Henrik Happe)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: doubling pixels horizontally
- Date: 20 Feb 1996 10:41:35 GMT
- Organization: CyberCity of Denmark
- Message-ID: <1258.6624T673T2290@vip.cybercity.dk>
- References: <4f4ibc$gl9@news.cs.tu-berlin.de> <591.6610T1165T2102@login.eunet.no><1045.6611T753T2256@vip.cybercity.dk><4faoe1$47@sunsystem5.informatik.tu-muenchen.de><2991.6612T1034T625@vip.cybercity.dk><576.6613T1070T1730@login.eunet.no><1257.6614T57T922@vip.cybercity.dk><1225.6615T1229T800@login.eunet.no><1140.6616T51T1538@vip.cybercity.dk><1982.6617T1096T103@ifi.uio.no><2175.6620T1429T2950@vip.cybercity.dk>
- <3764.6622T781T478@ifi.uio.no> <1597.6622T1436T2294@login.eunet.no>
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-
-
- Patrick Hanevold ( patrick.hanevold@login.eunet.no ) wrote:
-
- >>>Then you can't do a hole blitter pass. Are you using the blitter???
- >>Maybe it was a little unclear? The CPU-2-passes code is now 40% faster than
- >>in the first version. So there is much *more* time for *rendering*.
- >>(I don't care much about how much time the blitter uses as long as it
- >>finishes it work in less than a frame!)
-
- >>Mine current routine is using 48 cycles on 2 passes.
-
- >> move.l #160*128/8-1,d7
-
- >>Loop:
- >> move.l (a0)+,d0 ;Linear Chunky buffer
- >> move.l (a0)+,d1
-
- >> <2 passes = 48 cycles>
-
- >> move.l d0,(a1)+ ;chipram
- >> move.l d2,(a1)+
-
- >> dbra d7,Loop
-
- > What the heck is this??? I didnt wrote this!! I certantly wouldnt do a read
- > right after a chip write. Bad boy! Bad boy Ludvig. :)
-
- Hmm... The 40% increase is then only for a fastmembuffer to chipmem c2p conversion and
- not for a render direct to chipmem (as in rot&zoom'ers where you make the calculations
- during chipmem writes)?
-
- Have someone made a c2p that can convert a linear chunkybuffer in chipmem with only
- 2 blitter passes?
-
- Hans Henrik Happe
- Goat / Sumpen
-
- You can kill the human race, but you can't kill the AMIGA.
-
-