interpreting glxinfo's output

[andrew rader]

thanks for the fast reply,

that does indeed answer my question, with one additional question. The
last post has the general extension list described:

"general: and that's the resulting supported GLX extensions, depending
what the server and client sides support."

would it be better to just say "general is a list of the extensions
that the driver supports"? since both the client and server (in my
case) support TFP, but "general" doesn't, is it the driver that is
missing this extension?

-Andy

On Wed, Mar 26, 2008 at 5:05 PM, Dan B. Phung <phung at cs.columbia.edu> wrote:
> the bottom of this thread has your answer...though this is from Dec
> 2006, so somebody else might have updated information.
>
> http://forum.compiz-fusion.org/archive/index.php/t-87.html
>
>
>
>
> andrew rader wrote:
> > Hi all,
> >
> > I've been toying with the idea of creating a small compositing window
> > manager for a while, and I've started looking at the sourcecode of
> > compiz, xcompmgr, etc and I have a quick question. I'm currently using
> > a laptop with the intel gm965 chipset (aka X3100) and I've been
> > bothered by the output of glxinfo regarding the texture_from_pixmap
> > extension.
> >
> > My app is using the glXQueryExtensionsString function to check for the
> > existence of the GLX_EXT_texture_from_pixmap extension, without
> > success. The output of this function is the following string:
> >
> > "GLX_ARB_get_proc_address GLX_ARB_multisample GLX_EXT_import_context
> > GLX_EXT_visual_info GLX_EXT_visual_rating GLX_MESA_copy_sub_buffer
> > GLX_MESA_swap_control GLX_MESA_swap_frame_usage GLX_OML_swap_method
> > GLX_SGI_make_current_read GLX_SGI_swap_control GLX_SGI_video_sync
> > GLX_SGIS_multisample GLX_SGIX_fbconfig GLX_SGIX_visual_select_group "
> >
> > The above clearly does not contain the texture_from_pixmap extension,
> > but when I run glxinfo I get the following (snipped for brevity):
> >
> > name of display: :0.0
> > display: :0  screen: 0
> > direct rendering: Yes
> > server glx vendor string: SGI
> > server glx version string: 1.2
> > server glx extensions:
> >    GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap,
> >    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
> >    GLX_OML_swap_method, GLX_SGI_make_current_read, GLX_SGI_swap_control,
> >    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_visual_select_group
> > client glx vendor string: SGI
> > client glx version string: 1.4
> > client glx extensions:
> >    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
> >    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_allocate_memory,
> >    GLX_MESA_copy_sub_buffer, GLX_MESA_swap_control,
> >    GLX_MESA_swap_frame_usage, GLX_OML_swap_method, GLX_OML_sync_control,
> >    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync,
> >    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
> >    GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap
> > GLX version: 1.2
> > GLX extensions:
> >    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
> >    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
> >    GLX_MESA_swap_control, GLX_MESA_swap_frame_usage, GLX_OML_swap_method,
> >    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync,
> >    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_visual_select_group
> > OpenGL vendor string: Tungsten Graphics, Inc
> > OpenGL renderer string: Mesa DRI Intel(R) 965GM 4.1.3002
> > OpenGL version string: 1.4 Mesa 7.0.2
> > OpenGL extensions: <snip>
> >
> > So my question: what is the difference between "server glx
> > extensions", "client glx extensions", and "GLX extensions"? It appears
> > the the first two list "GLX_EXT_texture_from_pixmap" as supported, but
> > the "GLX extensions" list does not.
> >
> > Is this a configuration issue? a driver issue? any ideas would be appreciated
> >
> > -Andy
>
> > _______________________________________________
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> > xorg at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/xorg
> >
>