Implement dynamic MSAA on OpenGL
This is an initial attempt. We use a few coverage ops that haven't
been updated to handle MSAA yet, and other times we trigger MSAA when
we shouldn't, but it sets the basic functionality in place.
Bug: skia:11396
Change-Id: I8acfe4283bccf5543d4b774692e39427142b3228
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/395996
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
15 files changed