Allow rect and circle blur fast cases to be used with rotation matrices.
For circles this is trivial. The existing shader works as is.
For rects this requires back projecting from device space.
Adds a GM for rotated rect blurs and modifies a circle blur GM to add
rotation.
Bug: chromium:1087705
Change-Id: I6b969552fbcc9f9997cfa061b3a312a5a71e8841
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/318757
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
7 files changed
