Fix missing luminance and alpha floating-point format selection.

Bug 25351037

Change-Id: I0c758a218d15116fa5593eb9ddb783141ff93146
Reviewed-on: https://swiftshader-review.googlesource.com/4181
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
1 file changed