home *** CD-ROM | disk | FTP | other *** search
- Path: comma.rhein.de!serpens!not-for-mail
- From: mlelstv@serpens.rhein.de (Michael van Elst)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Demo/game to OS friendly part II
- Date: 22 Jan 1996 22:55:30 +0100
- Organization: dis-
- Message-ID: <4e114i$4o8@serpens.rhein.de>
- References: <38232020@kone.fipnet.fi> <9PxXx*kka@aargh.incubus.sub.org> <4des65$bgk@serpens.rhein.de> <38232076@kone.fipnet.fi> <4djpni$t6h@serpens.rhein.de> <4dm07g$ouh@sunsystem5.informatik.tu-muenchen.de> <4dmm79$9hu@serpens.rhein.de> <4e0jhq$f0q@sunsystem5.informatik.tu-muenchen.de>
- NNTP-Posting-Host: serpens.rhein.de
-
- fischerj@informatik.tu-muenchen.de (Juergen "Rally" Fischer) writes:
-
- >don't you think someone knowing about OS-coding, but beeing
- >a friendly, non-agressive fellow, couldn't achieve more ? ;)
-
- Ignoring the discussion as always.....
-
- No, I am quite sure that noone can achieve anything if the other
- side is as stubborn as you.
-
- >|> Right. It depends on lots of things, so at least a straight
- >|> copy can be optimized by the driver.
-
- >? how to optimize move.l (a0)+,(a1)+ ;)
-
- By starting the DMA channel ?
- By using movem.l to send bursts of data ?
- By funneling the data into a FIFO at a constant address ?
-
- You do not know. The driver does.
-
- >I'd suggest the driver gives you a buffer you can render to,
-
- And again you are limited to a single possible architecture.
-
- >If the card can display multiple buffers and writing bytewise to it
- >is faster than writing bytewise to fastmem + copying the buffer,
- >the driver will give you an adress in vram. voila :)
-
- But why should writing bytewise be faster ?
-
- >So making the OS more sucking
-
- Again just insults.
-
- >would keep then from using
- >OS-functions to get fast animation ?
-
- Fast animation doesn't need user-level access the graphics buffer.
-
- >any games showing fast gfx naturally want to have a screen (better
- >say screenbuffer) they can render to. also OS-coded ones will still
- >want "a complete screen allocated to you." because no game is fun
- >on half screens.
-
- This surely depends on the screen, especially on the screen _size_.
-
- >you can keep game programmers from doing this in providing a powerful
- >interface that doesn't suck
-
- again just insults.
-
- >and so won't force them to do direct poking
- >something.
-
- Nobody is forced.
-
- --
- Michael van Elst
-
- Internet: mlelstv@serpens.rhein.de
- "A potential Snark may lurk in every tree."
-