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- Path: sparky!uunet!math.fu-berlin.de!news.netmbx.de!Germany.EU.net!mpifr-bonn.mpg.de!speckled.mpifr-bonn.mpg.de!mlelstv
- From: mlelstv@speckled.mpifr-bonn.mpg.de (Michael van Elst)
- Subject: Re: Chunky Pixel Mode for Low End Chip Set?
- Message-ID: <1992Dec28.123142.5096@mpifr-bonn.mpg.de>
- Sender: news@mpifr-bonn.mpg.de
- Nntp-Posting-Host: speckled
- Organization: Max-Planck-Institut f"ur Radioastronomie
- References: <Karsten_Weiss.0n2o@ibase.stgt.sub.org> <1hbngoINNglt@uwm.edu> <jbickers.0m2n@templar.actrix.gen.nz> <72410@cup.portal.com> <1992Dec26.170503.14668@mpifr-bonn.mpg.de> <jbickers.0m3z@templar.actrix.gen.nz><1992Dec27.011313.18163@mpifr-bonn.mpg.de > <jbickers.0m50@templar.actrix.gen.nz><1992Dec27.155756.23491@mpifr-bonn.mpg. de> <jbickers.0m6w@templar.actrix.gen.nz><1992Dec28.000531.26783@mpifr-bonn.mpg.de> <jbickers.0m7s@templar.actrix.gen.nz>
- Date: Mon, 28 Dec 1992 12:31:42 GMT
- Lines: 34
-
- In <jbickers.0m7s@templar.actrix.gen.nz> jbickers@templar.actrix.gen.nz (John Bickers) writes:
- > Yes it is. For a 320x200 screen it's a maximum of 64000 byte reads
- > and writes with chunky pixels, supposing all pixels turned out to
- > need replacing. How can you get better than that with planes?
-
- I didn't say: get better. They are about the same speed.
-
- > Any particular advantages? I can't think of any. If you want to
- > draw a horizontal line to fill a shape, you don't have to mask off
- > each end with chunky pixels. You do with bitplanes.
-
- Fortunately this is a no-time operation. :)
-
- >> :) Hmm, the classic method is using Flood(). There's nothing that forbids
- >> the graphics.library to access the hardware and use every optimization.
-
- > And it will (or should) be faster with chunky pixels than with
- > planes! Chunky pixels rule ok!
-
- I can't see why it should be faster..
-
- > Well, that kills that idea. :) Non-scrollable screens will be nice
- > though, sort of like the switching between modes that PCs do, so
- > that the different displays can share the monitor with the OS
- > knowing about it, instead of a human having to flip a switch :).
-
- Right. That's already supported (look at A2024 screens).
-
- Regards,
- --
- Michael van Elst
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