static routines for direct map vertices

Split out the non-color-no-clip case for future specialization. This
routine will handle the vast majority of the glyph drawing. Split out
the generalized case too.

This change alone has a 20% improvement for performance due to fewer
register spills.

Change-Id: I89650c29ca273ac6e30266c2419029a7f177b029
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/310516
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
1 file changed