[Mesa-users] Mesa 12.0.0 on Windows question

[Rick Irons]

Thanks.
Does the renderer have runtime CPU detection or is the specific CPU support determined at compile time?   I would like to understand the portability of Mesa to Windows configurations different than the one on which it was built.
Any links to such info would be appreciated.
Rick

_____________________________
From: Albert Freeman <albertwdfreeman at gmail.com<mailto:albertwdfreeman at gmail.com>>
Sent: Saturday, September 17, 2016 1:02 AM
Subject: Re: [Mesa-users] Mesa 12.0.0 on Windows question
To: Rick Irons <rick.irons at mathworks.com<mailto:rick.irons at mathworks.com>>
Cc: <mesa-users at lists.freedesktop.org<mailto:mesa-users at lists.freedesktop.org>>


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<mailto:Rick.Irons at mathworks.com>> wrote:
> Hi,
>
>
>
> 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...
>
>
>
> Version: 3.0 Mesa 12.0.0
>
> Vendor: VMware, Inc.
>
> Renderer: Gallium 0.4 on softpipe
>
>
>
> 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?
>
>
>
> Thanks for any clarifications.
>
>
>
> Rick
>
>
>
>
>
>
>
>
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