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- Path: marton.hsr.no!lolsen
- From: lolsen@hsr.no (Lasse Olsen)
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: Hombre history - RISC selection
- Date: 1 Jan 1996 19:16:33 GMT
- Organization: Hogskolen i Stavanger
- Message-ID: <4c9buh$9to@marton.hsr.no>
- References: <john.hendrikx.42u6@grafix.xs4all.nl> <837.6573T949T12@ts.umu.se>
- NNTP-Posting-Host: gorina8.hsr.no
- X-Newsreader: TIN [version 1.2 PL2]
-
- Mattias Sandgren (sagge@ts.umu.se) wrote:
-
- : On 30-Dec-95 00:38:44, John Hendrikx wrote:
-
- : > I don't think so. Every pixel in a 16-bit screen has the
- : > choice of 65536 different possible shades, while a pixel in
- : > a HAM8 picture can only chose from 256 different colors.
-
- : It's from a basic palette of 64 colours, 6 bits. The other
- : 2 only show which colour cannon (R,G,B) to modify using the
- : value of the next pixel. This gives a lot more than 256
- : colours but is awkward to use.
-
- Ham8 can also be computed from the 24-bit palette.
-
- : >16-bit will look better most of the time, especially when
- : >you consider that dithering is much more effective for
- : >16-bit screens than it can be for HAM screens.
-
- : I wish I had 16 bit too.. Do all graphic cards use only 15
- : bits (5 per cannon) or is one 6 bit? I heard GREEN used 6
- : while R & B used 5 bits.
-
- This approach was used in some types of cards, mainly
- workstations, but was found to be of limited practical use.
- Today most cards have changed this extra green bit for
- an alpha channel.
- Cheers...
-
-