Variant of SkRegion::op (called Oper) that either writes the result into a 3rd
region (normal mode) or does a quick-return if the result will be non-empty
(called for predicates like contains() and intersects()).

git-svn-id: http://skia.googlecode.com/svn/trunk@3791 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed