On 10/18/2011 10:50 AM, Peter Hanzel wrote:
> Hello.
>
> I am following Mesa3d-dev mailing list and also found your commit to 
> mesa/vmwgfx:
>
> b056516d5efb9386c35f45faf8190e3c211773f8
> vmwgfx: Require HWV8 for 3d support
> On lower versions, the way we mix 2D and 3D may be too slow.
>
> Does this mean that for 3D working in VMWare now I need VMWare 
> workstation 8?
> If i just change the line
>
> @@ -52,7 +52,7 @@ bool vmw_fifo_have_3d(struct vmw_private *dev_priv)
> if (hwversion == 0)
>    return false;
> - if (hwversion < SVGA3D_HWVERSION_WS65_B1)
> + if (hwversion < SVGA3D_HWVERSION_WS8_B1)
>    return false;
> return true;
>
> Back to WS65_B1, the 3d will work but slowly? or will work corrupted?
>
> Thanks for info.
>
> Peter Hanzel

Peter,
You will mainly get two problems:

1) If you alter the cliprects of a 3D window, like partly covering it 
with another window, each update of the 3D window will trigger a 
software readback, which will make things slow.

2) There is no guarantee that the kernel can fulfill large user-space 
requests for DMA bufffers, so you might run into problems with apps with 
large DMA buffer requirements. Like specviewperf for example.

Otherwise I think it should work, but we haven't really tried.

/Thomas



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