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Gert Wollny authored
Softpipe doesn't support more than one sample, so this function implements the interpolation at sample 0 and adds a stub to make it possible to interpolate at other samples. As it is this makes the piglits "fs-interpolateatsample-*" pass, but they only ever test sample 0 anyway. Signed-off-by: Gert Wollny <gert.wollny@collabora.com> Reviewed-by: Roland Scheidegger <sroland@vmware.com>
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