[Mesa-users] Mesa 12.0.0 on Windows question

[Albert Freeman]

yes llvm support its required to build llvmpipe which like softpipe
only uses the cpu for rendering however has greater performance

On 17 September 2016 at 07:45, Rick Irons <Rick.Irons at mathworks.com> wrote:
> Hi,
>
>
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> I have built Mesa 12.0.0 on a Windows 10 machine and I would like to better
> understand the rendering support that is being provided.  The version,
> vendor, and renderer are being identified as the following by opengl32.dll…
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> Version:               3.0 Mesa 12.0.0
>
> Vendor:                VMware, Inc.
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> Renderer:           Gallium 0.4 on softpipe
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>
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> What exactly does the ‘softpipe’ portion of the renderer info mean?  Does it
> mean that the OpenGL implementation is purely software based with no
> reliance on either GPU or CPU?  I suspect this to be the case since display
> performance is poor with scenes of simple complexity.
>
>
>
> When building the DLL I noticed a warning that LLVM was not available and
> would not be used.  I am speculating that if I installed LLVM the makefile
> configuration tool would detect it and perhaps build a ‘Gallium 0.4 on
> llvmpipe’ renderer.  Is this the case?  Would this renderer leverage either
> the CPU or any available GPU?  Additionally, if no supported CPU or GPU
> hardware was detected, would the renderer know to revert to a purely
> software based implementation?
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>
>
> Thanks for any clarifications.
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>
> Rick
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