Some group effects (including layer opacity) are not applied upfront,
via an expensive saveLayer, but are deferred until we can determine
whether they can be folded into an atomic draw's paint (to avoid the
extra layer).
At the moment, the MotionTile custom render node drops all pending
paint effects on the floor (ignores |ctx|). Update to apply via the
shader paint.
Also update a couple of related tests to animate opacity.
Change-Id: I1f5cd2459ec81b170749528e8818d0be598a7ca7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/452723
Commit-Queue: Florin Malita <fmalita@google.com>
Reviewed-by: Jorge Betancourt <jmbetancourt@google.com>
The motion tile phase is a one-dimensional shift, applied to every other
row or column (based on a selector property).
Implement using a masking shader (covering the static rows/cols),
and blend mode shader composition (srcIn for static/pass-through
rows/cols, and srcOut for phased rows/cols).
TBR=
Change-Id: I336c150e5d4900962dc2de801a4e1572cf4b5d59
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/221339
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
