This is necessary for cube or 2D array shadow texture sampling functions which need the fourth texture coordinate component for depth comparison while also taking a lod or bias parameter. Change-Id: I1e1399f134e22cecaff97a224df2c13c57ba3a40 Reviewed-on: https://swiftshader-review.googlesource.com/13551Reviewed-by: Nicolas Capens <nicolascapens@google.com> Reviewed-by: Alexis Hétu <sugoi@google.com> Tested-by: Nicolas Capens <nicolascapens@google.com>
