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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 19:09:15 GMT
- Organization: Hogskolen i Stavanger
- Distribution: world
- Message-ID: <4c9bgr$9to@marton.hsr.no>
- References: <john.hendrikx.42u6@grafix.xs4all.nl>
- NNTP-Posting-Host: gorina8.hsr.no
- X-Newsreader: TIN [version 1.2 PL2]
-
- John Hendrikx (john.hendrikx@grafix.xs4all.nl) wrote:
- : In a message of 26 Dec 95 Lasse Olsen wrote to All:
-
- : LO> : That's true, there is quite some processing power involved using the
- : LO> HAM : screens. Even displaying a picture using HAM is easily 5-10 times
- : LO> slower vs : using a true-color screen.
-
- : LO> What kind of 'heavy' processing power is involved really?
-
- : 24-bit formats cannot easily be displayed on HAM screens. Getting them to look
- : good on HAM screens is quite expensive.
-
- This is why I asked you to point out exactly what
- processing is involved John.
-
- : This easily makes displaying such a
- : picture 5-10 times slower than if you had a true 24-bit screen.
-
- Even if a 24-bit screen occupies 3 times the bandwidth of ham8?
-
- : Of course you say I should have saved my pictures in HAM8, but this is hardly
- : practical. Such images are way too large and often of worse quality than JPEGs
- : of only half the size, so in real life HAM8 will be slow to use as you want to
- : display JPEGs on it.
-
- Computing ham8 from an imagenary 18-bit palette or with the full
- 24-bit does not strain the hardware to any extreme degree.
-
- : LO> : Eh? I've yet to find a PCI gfx-card without 24-bit. 16-bit however
- : LO> should be : about equal quality as HAM8, but much faster and easier to
- : LO> use.
-
- : LO> Depends on what you are displaying. For strictly defined
- : LO> layouts, like a desktop screen and some types of 'natural'
- : LO> photo-imagery, this is true. But for a lot of scientiffic,
- : LO> technical or otherwise shade-intensitive images, like video-
- : LO> presentations and renders, you are much better off with that
- : LO> 24bit palette in ham8.
-
- : I don't think so. Every pixel in a 16-bit screen has the choice of 65536
- : different possible shades,
-
- No, only 32-base colors of RBG are allowed in 16-bit, that's
- why it looks like garbage with graphics of this kind.
-
- : while a pixel in a HAM8 picture can only chose from
- : 256 different colors.
-
- 256 shades of both R, G and B, yes.
-
- : 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.
-
- Why? Elaborate.
- Cheers...
-