[skottie] Initial text editing experiment
Introduce an optional GlyphDecorator callback, executed when rendering
each individual glyph.
Start experimenting with a sample editor implementation for Viewer
(selection-only so far).
Bug: b/259298707
Change-Id: I5737c91f4fc56d8877b7919009d889865aac1135
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/606516
Reviewed-by: Jorge Betancourt <jmbetancourt@google.com>
Commit-Queue: Florin Malita <fmalita@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
10 files changed
