We can reuse the surface rotation matrix code to do the y-flip.
This requires the SPIR-V transformation support. Because not
all rotations are encoded into the table we can only support
rotation with the driver support for y-flip (currently).
Includes some very minimal regression testing. This work is
targeted towards supporting vk-portability implementations
which are not as up-to-date with Vulkan features.
Bug: angleproject:5596
Change-Id: I270fa1efc03267551d28df33ddac9972e1343d60
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2665892Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Ian Elliott <ianelliott@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
