New plan -- aa and lcd DO belong on SkFont

edging settings are needed for metrics calls, as well as drawing, hence
we really have to include them in almost every SkFont call/usage, so I
guess we can just accept them as real.

This seems to imply that we have to document what happens in drawTextBlob,
since it has a bunch of SkFonts (runs) AND a paint. This is the situation
today of course, and I had hoped to simplify it, but I think I've failed.

Proposal dox for drawTextBlob.

drawTextBlob respects the paint when drawing the blog, but it IGNORES the
paint's antialias (and lcdrender) flags, as these are already specified in
the blob's runs.

Bug: skia:2664, skia:8494
Change-Id: I8f69186c9c337d98d058919f53b7901ff830a16e
Reviewed-on: https://skia-review.googlesource.com/c/170352
Auto-Submit: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
5 files changed