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Re: AIGLX
- From: Jon TURNEY <jon dot turney at dronecode dot org dot uk>
- To: cygwin-xfree at cygwin dot com, kdo at cosmos dot phy dot tufts dot edu
- Date: Mon, 24 Jan 2011 18:38:36 +0000
- Subject: Re: AIGLX
- References: <4D375370.8020005@dronecode.org.uk> <E1PgL9i-00034B-Uv@cosmos.phy.tufts.edu>
- Reply-to: cygwin-xfree at cygwin dot com
- Reply-to: cygwin-xfree at cygwin dot com
On 21/01/2011 17:52, Ken Olum wrote:
> From: Jon TURNEY <jon.turney@dronecode.org.uk>
> Date: Wed, 19 Jan 2011 21:11:12 +0000
>
> Anyhow, can you try with 'GLWIN_NO_WGL_EXTENSIONS=1 XWin -wgl -multiwindow'
>
> Thanks. I did this and it worked. However, for a particular paraview
> dataset that I happened to have lying around it is slower than direct
> rendering by a factor of about 2. That may be related to the fact
> that this particular scene has wiggly tubes with structure too small
> to show on the screen, so there is a high ratio of data to things that
> actually get displayed. For the same scene, unaccelerated indirect
> rendering is much slower than accelerated, perhaps by a factor of 10.
> So when you can't use direct rendering, acceleration is a big help.
Ok, thanks very much for trying it out anyhow. It's very useful to have a
data point like that for an actual real-world use case :-)
Another factor is possibly that you aren't going to get awesome hardware
accelerated performance with an Intel 845G, either.
> Once I say -wgl, direct rendering no longer works. That is, if I
> don't set LIBGL_ALWAYS_INDIRECT, then I get a long (infinite?)
> sequence of errors like this:
>
> X Error: BadMatch (invalid parameter attributes) 8
> Major opcode: 73 (X_GetImage)
> Resource id: 0xa0039a
I can't reproduce this problem. Can you give me a few more details on the
host which is running paraview: unix version, version of libGL and version of
paraview?
Do you get that error with other OpenGL applications (e.g. glxinfo) or just
paraview?
--
Jon TURNEY
Volunteer Cygwin/X X Server maintainer
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