[Bug 82463] i965: Using EWA algorithm for isotropic case

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82463

--- Comment #11 from Iago Toral <itoral at igalia.com> ---
The list of regressed tests above is for IVB, for HSW we have these and the
shadow versions too.

In IVB I can fix the regressed tests by enabling the texture gradient lowering
pass (currently only enabled for shadow samplers), since with that we compute
the LOD manually from the gradients. That apparently fixes the problem for HSW
too.

I'll test this a bit more and if I don't see other regressions I will send a
patch for review to the mailing list.

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