don't bother passing lowp kernels dummy unnamed variables

In these foo_k() kernel functions, the rgba and d-rgba inputs are passed
in as zero but not used (or even named) in geometry->geometry
operations, and similarly the F x, F y parameters are unused for
pixel->pixel operations.

That's confusing me.  I think I'd rather just not pass them at all.

It's not important for the foo_k() kernel functions to have a consistent
ABI, or really any known ABI at all, only the foo() stage functions. So
this should be a strict refactor, no correctness or codegen change.

Change-Id: Id98e27708bc469a9e50cd457e2128aed7ca52a51
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/201946
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed