Since we can't use mask filters on layer paints any longer, refactor the
existing wipe effects to use explicit shader masking:
- remove SkSG::MaskFilterEffect - it no longer works
- replace with SkSG::MaskShaderEffect
- for atomic draws, apply the shader to the draw paint as
SkShader::Blend(kSrcIn, mask_shader)
- for isolated content, apply the mask as an extra pass
drawPaint(kDstIn, mask_shader) before restoring the layer
- refactor VenetianBlindsEffect, LinearWipeEffect and RadialWipeEffect
to use mask shaders
- additionally, refactor the RadialWipeEffect gradient to avoid using
a local shader matrix (does not compose correctly within the new
framework)
Everyone clear... do not touch the patient... BZZZT!
TBR=
Change-Id: I3a88da97a17b3b68812480cad5298b8778b6847c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/275694
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
4054061b0b