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- Newsgroups: comp.unix.bsd
- Path: sparky!uunet!spool.mu.edu!yale.edu!ira.uka.de!math.fu-berlin.de!informatik.tu-muenchen.de!roell
- From: roell@informatik.tu-muenchen.de (Thomas Roell)
- Subject: Re: ET4000/W32 and VESA VL-Bus
- In-Reply-To: stripes@pix.com's message of Thu, 24 Dec 1992 04:31:52 GMT
- References: <BzBEI1.CH@aeon.in-berlin.de>
- <1992Dec20.153314.24148@Informatik.TU-Muenchen.DE>
- <1992Dec22.125737.24088@cti-software.nl> <Bzqxx4.614@pix.com>
- Sender: news@Informatik.TU-Muenchen.DE (USENET Newssystem)
- Organization: Inst. fuer Informatik, Technische Univ. Muenchen, Germany
- Date: Thu, 31 Dec 1992 11:48:47 GMT
- Message-ID: <1992Dec31.114847.6323@Informatik.TU-Muenchen.DE>
- Lines: 23
-
- > However I can't think of any way in which the 4000/W32 could be bad for X
- > that the S3 wasn't. (it could include more windows stuff 'tho) Except for
- > devoting a larger part of the chip for stuff useless to X...
-
- Just one example, this time from the XGA. This XGA is tuned for
- MS-Windows. MS-Windows allows you to have a fullblow bitmap as a
- clipping area (of cource X does as well, but usually only rectangles
- or a list thereof are used). The XGA implements this in hardware. But
- one the other hand if you just want to have the good old scirroring
- (i.e. only one clipping rectangle instead of a whole bitmap), the
- performance penalty is significant, and you end up in doing software
- clipping instead of the hardware clipping you can do with the S3 guys.
-
- The point is that MS-Windows is in some places stuff with more
- (unnecessary ?) features that slow sometimes down the more general
- cases, when done in hardware.
-
- - Thomas
- --
- -------------------------------------------------------------------------------
- Das Reh springt hoch, e-mail: roell@sgcs.com
- das Reh springt weit, #include <sys/pizza.h>
- was soll es tun, es hat ja Zeit ...
-