Date: Thu, 14 May 2009 17:26:56 +0200 From: Oliver Lehmann <oliver@FreeBSD.org> To: x11@FreeBSD.org Cc: Tom Evans <tevans.uk@googlemail.com> Subject: Re: Problem with OpenGL and ATI HD3850 Message-ID: <20090514172656.18fb4350.oliver@FreeBSD.org> In-Reply-To: <20090513203129.fb21a669.oliver@FreeBSD.org> References: <20090429164113.f0b48048.lehmann@ans-netz.de> <20090429163843.GB370@slackbox.xs4all.nl> <18936.36210.823588.838523@gromit.timing.com> <20090430063454.969303d0.lehmann@ans-netz.de> <1241092672.3294.6.camel@localhost> <20090430122155.6643.qmail@avocado.salatschuessel.net> <18937.44531.88172.177326@gromit.timing.com> <20090430173416.042e03a8.oliver@FreeBSD.org> <20090513203129.fb21a669.oliver@FreeBSD.org>
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Hi, talking with the ogre guy (I opened a bug report about that) He told me, that True is hardcoded here when calling glXCreatecontextwithConfigSGIX is set because: "The implementation should know whether it can do direct rendering or not, and fall back on X rendering if not, so True should always be a safe option. The only reason to pass False is if you need to share the context between processes. So this looks like an error in some part of your installed software." So if this is true, and regarding to http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?db=man&fname=/usr/share/catman/g_man/cat3/OpenGL/glxcreatecontextwithconfigsgix.z it looks like that, I wonder why the context returned by the function when having no 3d support is not working. What is wrong with either the drm for ATI, opengl or the glXCreatecontextwithConfigSGIX call? Oliver Lehmann wrote: > Oliver Lehmann wrote: > > > A guy in the ogre forum told me that Ogre cannot be run with a Software > > Rasterizer - that might be the case but I still wonder why glGetString > > isn't returning anything.... > > Ok, > > I found out, that the glContext is getting somehow created wrong. > It is created with > > glxContext = glXCreateContextWithConfigSGIX(mGLDisplay, fbConfig, > renderType, shareList, direct); > > having direct alwasy be True and renderType GLX_RGBA_TYPE. > Changing direct to False it gets a bit further and glGetString returns > the requested information. (Then it still crashes with some framebuffer > related message which I haven't looked at yet). > > Can someone explain to me what the last parameter of > glXCreateContextWithConfigSGIX is for and why True is not working here? > glxContext is not NULL when True was specified. -- Oliver Lehmann http://www.pofo.de/ http://wishlist.ans-netz.de/
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