jumper, finish blend modes
I've decided to ignore our existing CPU implementations and start from
scratch, mostly referencing the GL ES 3.2 spec and w3 spec.
This implementation ought to look a lot like the reference
implementation I've written in gm/hsl.cpp, with the addition of
handling alpha: unpremul, blend, re-premul with a simple SrcOver alpha.
Change-Id: I38cf6be2dc66a6f46d7b18b91847f6933d2fab62
Reviewed-on: https://skia-review.googlesource.com/15316
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
8 files changed