Refactor HAL to GL format conversions.

Bug 25390254

Change-Id: I434e6d319335be00204eff88f09c98b2dd4f2acc
Reviewed-on: https://swiftshader-review.googlesource.com/4188
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
3 files changed