home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.windows.x.i386unix
- Path: sparky!uunet!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: Accessing video memory bypassing Xserver
- Organization: AT&T
- Date: Fri, 22 Jan 1993 23:08:01 GMT
- Message-ID: <1993Jan22.230801.3189@cbnewsj.cb.att.com>
- References: <epstein.727300746@trwacs> <1993Jan22.004818.1494@cbnewsj.cb.att.com> <C19usA.Jvv@lut.fi>
- Lines: 23
-
- In article <C19usA.Jvv@lut.fi> junki@lut.fi (Juha Nurmela) writes:
- > In article <1993Jan22.004818.1494@cbnewsj.cb.att.com>, dwex@cbnewsj.cb.att.com (david.e.wexelblat) writes:
- > |> Any particular reason that the MITSHM extension doesn't already do what
- > |> you're after? If you're using an ET4000, I think you would be (very)
- > |> hard pressed to find a faster way to do this than creating shared-memory
- > |> pixmaps, and then XCopyArea'ing the whole pixmap to the screen. Unless
- > |> you want to reimplement SpeedUp (which I don't recommend).
- > |>
- > This sounds good. I had scanned the manual pages for something like this
- > before I posted my question, but they didn't mention MITSHM anywhere.
- > Should have taken a look at /usr/include/X11/extensions/...
- > Can't get away without recompiling the server, however. This extension
- > might not exist in the XFree86 for 386BSD by default.
-
- No, it does not exist on 386BSD right now, because it's currently written
- for SYSV shared memory segments. I would imagine, though, that it would
- take half a day's work to make it work with mmap().
-
- >
- > --
- > Juha Nurmela, expert historian.
-
-
-