home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!agate!doc.ic.ac.uk!uknet!edcastle!dcs.ed.ac.uk!jaxh
- From: jaxh@dcs.ed.ac.uk (Jon Hanson)
- Newsgroups: comp.sys.amiga.graphics
- Subject: Re: Sliced HAM and Dynamic HAM
- Message-ID: <BxuwrI.Gn6@dcs.ed.ac.uk>
- Date: 17 Nov 92 10:50:06 GMT
- References: <Bxt9wx.Jpv@dcs.ed.ac.uk> <1992Nov16.225121.16422@athena.mit.edu>
- Sender: cnews@dcs.ed.ac.uk (UseNet News Admin)
- Organization: Department of Computer Science, University of Edinburgh
- Lines: 29
-
- In article <1992Nov16.225121.16422@athena.mit.edu>, yoav@athena.mit.edu (Yoav O. Yerushalmi) writes:
- > In article <Bxt9wx.Jpv@dcs.ed.ac.uk>, jaxh@dcs.ed.ac.uk (Jon Hanson) writes:
- > |> I'm in the middle of writing a general purpose, overscan IFF file viewer , and I want
- > |> to support the aforementioned image types.
- > |> Does anyone know the formats of these image types ? If they are IFF is there just
- > |> an extra block for the extra data ?
- >
- > Well, this isn't exactly an explanation at all, but I don't think the data for
- > Dynamic ham and ham could be that different, because dynamic ham pictures can be
- > loaded as ham pictures by normal programs. I definitely know that the method of
- > display is different, because the copper is used to redefine the base colors
- > after every certain scanline, could that help you decypher a Dham image??
- > I realise this is probably not much help, but I hope you succeed... Good luck
-
- Any good IFF loader would merely ignore any unrecognised blocks - thus it would ignore
- the copper list data - say a COPP block, and just read the HAM picture as normal. Of
- course the HAM picture won't look quite as good because the base colours on each
- scan-line should be wrong.
- I want to be able to interpret the copper list data and use it to display the picture.
- Surely someone knows that the format is. I might try and write an IFF disassembler
- which just breaks IFF files into separate blocks which I can then examine and find
- the info out for myself.
-
- Oh well...
-
-
- |.---..---. |---..---..---..---..---..---. .-------------------.
- || || | | |.---|| |`---.| || | | jaxh@dcs.ed.ac.uk |
- `--'`---'` ' ` '`---^` '`---'`---'` ' `-------------------'
-