This new image filter constructor enables SkRuntimeEffects to be
used as shaders within the ImageFilter DAG. The shader is created
lazily using the SkRuntimeShaderBuilder enabling the resulting
shader to consume the previous stage of the ImageFilter graph.
This relands commit ad9d774c1f after
fixing the threading issue found by the TSAN bot.
Change-Id: I06dc4cf6a304b14804c55531a5bc3f2afa34e219
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/477156
Auto-Submit: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
0612b52174