tree 7fe621a6c4c280878e1ac54c139de9689a520236
parent 1bc8669c8b787df9d30e954a3300d925d581d38a
author Nicolas Capens <capn@google.com> 1628003470 -0400
committer Nicolas Capens <nicolascapens@google.com> 1628025943 +0000

Fix computing anisotropy factor for single-level mipmap

When anisotropic filtering is enabled, we need to compute the anisotropy
factor. This computation is part of the LOD computation, so don't skip
it even when there's only a single mipmap level.

The computation of the LOD and anisotropy are a bit intertwined because
we need to adjust the LOD according to the anisotropy, but we could
still skip a few calculations in the single-level mipmap case. This
change does not perform this micro-optimization yet.

Bug: swiftshader:163
Bug: b/151263485
Change-Id: Ib250cfd9ec2d784761887c1c1f58c4127fa6d92e
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/56108
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Sean Risser <srisser@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>