Re: [Mesa3d-users] OpenGL version Restriction of Mesa

SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 422-6466

Setting environment variable LIBGL_ALWAYS_SOFTWARE=1 when running the
application tells mesa to load software rasterizer.

On Wed, Feb 17, 2010 at 6:25 PM, 정준영 <rh...@hl...> wrote:
> Hi, all Mesa users.
>
> I have heard that the Mesa is the software implementation of OpenGL. So it
> acts as OpenGL emulation.
> But I found that Mesa also supports DRI and applied DRI to the X Window
> System I use.
>
> However while the X Window system uses DRI,
> the version of OpenGL provided by Mesa is restricted to the version of
> OpenGL which graphics hardware driver supports.
>
> glxinfo ouput when DRI is used.
>     direct rendering: Yes
>     OpenGL vendor string: Tungsten Graphics, Inc
>     OpenGL renderer string: Mesa DRI Intel(R) 852GM/855GM 20061017
> x86/MMX/SSE2
>     OpenGL version string: 1.3 Mesa 7.0.3
>
> glxinfo output when DRI is not used.
>     direct rendering: No (If you want to find out why, try setting
> LIBGL_DEBUG=verbose)
>     OpenGL vendor string: Mesa project: www.mesa3d.org
>     OpenGL renderer string: Mesa GLX Indirect
>     OpenGL version string: 1.4 (2.1 Mesa 7.0.2)
>
> (I attach the full outputs of both glxinfo executions)
>
> The OpenGL commands belonging to OpenGL 2.1 is not available when DRI is
> used, but it is available when DRI is not used.
>
>
> I wonder that it is possible to use OpenGL emulation in case of the OpenGL
> command is beyond the OpenGL version supported by graphics hardware driver.
> Whilst the OpenGL commands provided by graphics hardware driver are
> processed by DRI.
>
> Thank you.
>
>
> ------------------------------------------------------------------------------
> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
> http://p.sf.net/sfu/solaris-dev2dev
> _______________________________________________
> Mesa3d-users mailing list
> Mes...@li...
> https://lists.sourceforge.net/lists/listinfo/mesa3d-users
>
>