Streamline skvm bilerp.
- Add lerp(F32,F32,F32) and lerp(Color,Color,F32).
- Rewrite bilerp to use lerp(), simplifying the weights we
calculate and generally making how bilerp works stand out
more clearly.
This trims ~4 registers from an arbitrary program I spot checked.
But I think the clarity is the big win.
Change-Id: I4d735c940ed9f3744aeae1c643bf58d68bf65605
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263199
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
3 files changed