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- Newsgroups: comp.sys.amiga.programmer
- Path: news99.sunet.se!liuida!news
- From: c92manen@und.ida.liu.se (Mans Engman)
- Subject: Re: How about a good p2c routine?
- X-Nntp-Posting-Host: astmatix.ida.liu.se
- Message-ID: <1124.6662T1277T64@und.ida.liu.se>
- Sender: news@ida.liu.se
- Organization: CIS Dept, Linkoping University, Sweden
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP) *UNREGISTERED*
- References: <4j2tbq$d6s@the-fly.zip.com.au>
- Date: Fri, 29 Mar 1996 20:17:01 GMT
-
-
- >I have written an AVI player for the Retina Z3. This player is now
- >being added to so that it also plays IFF ANIMs.
-
- >IFF ANIMs decode to planar, so what is a really fast way of converting
- >it to chunky for display on 3rd party graphics cards?
-
- Well, these usual fast-c2p algorithms based on masking/merging are possible
- to reverse. So basically, one would do the passes in the opposite order
- (begin with bit-unmerging, then 2-bit unmerging, etc.) and make sure all the
- bits end up in the right place.
- (If you don't know about this technique you should have a look at the c2p
- sources on aminet.)
- In theory it's easy, now if someone had time to implement it...?
-
- >Regards,
-
- >Stuart MacKinnon.
- >--
-
- >+- Stuart MacKinnon ------------------------------------ stuartm@zip.com.au
- >-+
- >| VIC20, CBM 128+1571, A1000+Sidecar, CD32, A4000/040+A4091+A2065+RetinaZ3!
- >| | Registered BeBox Developer - for those at the bleeding edge.
- >| | PHONE: +61 2 398 4578 (AH) +61 2 693 0445
- >| (BH) |
- >+--- Aztec C - Use it to MANXimise code inefficiency!
- >-----------------------+
-
- /Mans (.sig being recompiled)
-
-