Replace ModulateAlpha effect with Xfermode using src-in blend.
This reduces our code size by reusing existing components to perform
the same blend, and generates a shader that should be conceptually
equivalent (although it gives the inliner a bit more work to do).
Change-Id: Ie81e8b82d9b9c441533760d4e9f7e149bc0d969d
Bug: skia:10457
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/302262
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
11 files changed
