Clarify that the OpArgs' outputSwizzle comes from its GrRenderTargetProxy

Since we want to collect shader information early, this attempts to make clear that numSamples, origin and outputSwizzle can all be obtained from the target renderTargetProxy.


Change-Id: I42e0fd79e2163f17673ccdd344a31fbaadac5f53
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/246298
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
16 files changed