Add flush() to SkImage.
This allows a client to ensure all uses of a texture-backed image have
been flushed.
Does nothing if the image isn't texture-backed.
The implementation adds support for triggering a flush if any of a set
of proxies are used rather than just a single proxy.
Change-Id: I358882d9737e63c6e69b924c0767f49b8f8f36ec
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/212405
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
25 files changed