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List:       kwin
Subject:    Re: GetFBConfigs
From:       Philip Falkner <philip.falkner () gmail ! com>
Date:       2007-01-27 18:21:00
Message-ID: 200701271321.00771.philip.falkner () gmail ! com
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On Saturday 27 January 2007 10:36, Rivo Laks wrote:
> Ühel kenal päeval (laupäev 27 jaanuar 2007) kirjutas Lubos Lunak:
> > On Saturday 27 January 2007 14:09, Rivo Laks wrote:
> > > Ühel kenal päeval (laupäev 27 jaanuar 2007) kirjutas Philip Falkner:
> > > > Please test; I'm hoping this might get tfp working for you, Rivo.
> > >
> > > Yeah, TFP works now! Thanks a lot!

:)

> > > However, it often makes kwin crash when opening new window. Here's the
> > > end of the debug log:

:(

> > > kwin: Activation,
> > > compared:KWinInternal::Client(0x83db148) :1671677425:1671675677:true
> > > kwin: <unknown>(0x1800d61): 184
> > > kwin: [void KWinInternal::SceneOpenGL::Window::createVertexGrid(int,
> > > int)] 'Ark': Resized vertex grid from 0 quads (minreso: -1x-1) to 4
> > > quads (minreso: 0x0)
> > > kwin: <unknown>(0x1800e88): BadPixmap (invalid Pixmap parameter)
> > > kwin: <unknown>(0x1800e88): GLXBadDrawable
> > > kwin: ERROR: [void
> > > KWinInternal::SceneOpenGL::Window::findTextureTarget()] texture target
> > > is 0, supports_npot: true
> > > kwin:
> > > /mnt/homes/home/rivo/build/KDE/kdebase/workspace/kwin/scene_opengl.cpp:
> > >92 5: void KWinInternal::SceneOpenGL::Window::findTextureTarget():
> > > Assertion `false' failed.
> > > KCrash: crashing... crashRecursionCounter = 2
> > >
> > > Weird is that it only crashes in certain cases, not always. E.g. it
> > > crashes when opening first Ark window, but if an Ark window is already
> > > there and I open second (or third or forth, etc) one, it works fine. It
> > > always crashes when opening Speedcrunch window.
> > > I added the debug line which shows that target is 0. I have no idea why
> > > it's 0, maybe you know better. Or maybe it's just a bug in NVidia
> > > drivers...
> >
> >  Can you try completely removing the "GLX_TEXTURE_TARGET_EXT,
> > tfp_target," line from the attributes and check if that helps? It
> > actually does not seem to be necessary here with either of the machine I
> > have now at home, I'll need to check at work again what the problem was.
>
> It doesn't make any difference here.

Hmm.  I'm not sure why bound_glxpixmap wouldn't be created properly (which is 
what this sounds like).  Without an nvidia card, I can't test anything here, 
so I don't know what to suggest.

> I don't see much of a difference between TFP and SHM here.
> Your problem is probably that GeForce 5xxx doesn't really support npot
> textures. To support OpenGL 2.0, the driver emulates them for such cards
> which is possibly where your slowdown comes from.
> It would likely be a good idea to just check for ARB_npot extension and
> omit the GL 2.0 check when checking if npot textures are supported.

Sounds fine to me, assuming that ARB_npot would show up in a 2.0+ driver that 
doesn't emulate it in software.

-- 
Philip Falkner
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