tree 604ca57dac78b00fa2ef35ce9c5b982a76a47f7d
parent 3674f589ee89a401a8a2d19c70a22ce3c03c2f4b
author John Stiles <johnstiles@google.com> 1623857593 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1623864938 +0000

Add SkBlender class; thread into SkVMBlitter.

Like SkColorFilter, SkShader, etc., this has a public-facing component
(SkBlender) and a private subclass (SkBlenderBase) which can be
obtained via a helper function (as_BB). At present there are no public-
facing methods, but the type needs to be exposed to be usable by the
outside world.

These classes exist for SkRuntimeEffect to subclass. The blender base
provides a `program` method with the parameters that blending will use.

Change-Id: I75c772fd4108a9c21fbda84201a8b23d3750a0df
Bug: skia:12080
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/416916
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>