These work the same way; differences are in coordinate handling and
where we find the image format.

Bug: b/131171141
Change-Id: I9dccfd88e686102d6200bdba8a8ad64b7debeca3
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/29688Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Chris Forbes <chrisforbes@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>