extract original paths at big size to improve precision

As part of this, start introducing more consistent factories (matching classes like SkM44)

Change-Id: I453f1856c0427b008faaed9dbba5263e53a48ce4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290766
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Reed <reed@google.com>
5 files changed