home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.windows.x.i386unix
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewsk!cbnewsj!dwex
- From: dwex@cbnewsj.cb.att.com (david.e.wexelblat)
- Subject: Re: 32K or 16M colours?
- Organization: AT&T
- Date: Sun, 20 Dec 1992 00:04:26 GMT
- Message-ID: <1992Dec20.000426.21774@cbnewsj.cb.att.com>
- References: <linda.724803368@minnie>
- Lines: 43
-
- In article <linda.724803368@minnie> linda@cs.su.oz.au (Linda Distributed Language) writes:
- > Is anybody working on X servers for cards which display 32K or 16M colours,
- > like the 2theMax et4000 based card and other extended et4000 cards?
- > (the 2theMax will do up to 1280x1024x16, 1024x768x256, 800x600x32K)
- >
- >
- > Thanks for any info,
- >
- > David Monro
-
- No one is actively working on this, that I know of. It's one of my pet
- someday-when-I-have-a-bazillion-free-hours projects. I know several
- other people have expressed interest in this. We are always looking
- for people who want to tackle projects like this join the XFree86 beta
- team. If you are interested, send email to xfree86@physics.su.oz.au.
-
- Here's what I know about it:
-
- 1) The cfb code with X11R5 was only tested at 8 bits, and is
- known to need work to make it work with other depths.
- 2) The assembler parts of the frame-buffer code in XFree86 were
- designed for 8-bits, and will also need work.
- 3) X11R6 will likely have 8-bit, 16-bit, and 24-bit frame-buffer
- code.
- 4) 24-bit SVGA is going to require a LOT of work (perhaps an
- entire new framebuffer driver), because the 24-bit framebuffers
- on most system (and the Xsun24 code I looked at) assume that
- the 24-bits are aligned on 32-bit boundaries, and the 24-bit
- SVGA's are aligned on 24-bit boundaries (think of the pixel-
- addressing complexities here).
- 5) The 16- and 24-bit SVGA modes are SLOW (1/2 and 1/3 the speed
- of the 8-bit modes, respectively).
-
- I would expect that a 16-bit server could be done by a dedicated group
- without too much headache (lots of use of the XTEST suite will help :->).
- The 24-bit stuff is going to be much, much worse.
-
- --
- David Wexelblat <dwex@mtgzfs3.att.com> (908) 957-5871
- AT&T Bell Laboratories, 200 Laurel Ave - 3F-428, Middletown, NJ 07748
-
- "The meaning of life? That's simple. Try to be happy, try not to hurt
- other people, and hope to fall in love." -- Mallory Keaton
-