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- Path: god.bel.alcatel.be!nlev00!barnhoorn
- From: barnhoorn@nlev00 ()
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Easiest Way To Open A Screen For Drawing To.
- Date: 31 Jan 1996 12:04:56 GMT
- Organization: Alcatel Bell
- Distribution: world
- Message-ID: <4enlt8$7as@btmpjg.god.bel.alcatel.be>
- References: <4e783a$93p@sol.ccs.deakin.edu.au> <4e83md$pd7@btmpjg.god.bel.alcatel.be> <4e9j5s$ron@sunsystem5.informatik.tu-muenchen.de> <4eieki$oeb@btmpjg.god.bel.alcatel.be> <4elgen$6ds@sunsystem5.informatik.tu-muenchen.de>
- Reply-To: barnhoorn@nlev00 ()
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- In article <4elgen$6ds@sunsystem5.informatik.tu-muenchen.de>, fischerj@informatik.tu-muenchen.de (Juergen "Rally" Fischer) writes:
- |> well, what is "drawing" ? imho doing gfx-functions on a rastport.
- |> a screen also got a rastport, so IMHO it's clipped.
-
- Well, that's not true. I once tried to draw on a Screen's rastport,
- but as soon as I started to draw outside the screen's borders, the imagery
- was still visible, but somewhere else (so NOT clipped). This may result
- in a red guru, because you are drawing in memory, not belonging to
- your bitmap.
- A borderless, simple refreshed window is just a new Rastport WITH some
- layer-info. It is not as fast as displaying on a Screen's Rastport,
- but much safer.
- Try to Draw a line from (-1,-1) to (1,1) on your Screen's rastport and
- you will understand. I will try this tonight, because honestly I did
- not do this anymore since OS 1.3. Maybe things have changed in OS 3.0.
-
- Jaco.
-