tree d5c03e43991a18466ccf1aaa6293bcc8f2ad0a34
parent de0105d0bb7a58985fb71095168a3b78079c5f0c
author Nicolas Capens <capn@google.com> 1601489830 -0400
committer Nicolas Capens <nicolascapens@google.com> 1601516838 +0000

Fix clamping cube face coordinates to [0.0, 1.0) range

While cube face coordinates are nominally already in the [0.0, 1.0]
range due to the projection of the sampling coordinates onto the cube
face, the projection doesn't result in such normalized cube face
coordinates for Inf and NaN values in the sampling coordinates.

This change causes us to always clamp, matching the legacy OpenGL ES
code now.

Bug: b/132981873
Change-Id: Ib89d032ed4c5945f115269a4e8989aa03e52a6b5
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/48788
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>