[Mesa-dev] softpipe color interpolation
brianp at vmware.com
Mon Dec 19 09:30:51 PST 2011
On 12/19/2011 10:10 AM, Dave Airlie wrote:
> Hi guys,
> So we have some piglit tests
> that piglit fails
> This seems to be due to its linear interpolation not producing the
> correct answers compared to the hardware, on the rendered triangle,
> there is a obvious circle of darkness that isn't there on hw rendered.
> Looking at tri_linear_coeff I notice a large comment explaining that
> this could be done better, llvmpipe also uses the same code, is this
> what is causing the fail?
Quite possibly. It shouldn't be hard to hack softpipe to use
perspective-corrected color interpolation to see if that helps.
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