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

1 files changed, 6 insertions, 0 deletions

diff --git a/include/core/SkRegion.h b/include/core/SkRegion.h
index 7623b82262..f957cb5795 100644
--- a/include/core/SkRegion.h
+++ b/include/core/SkRegion.h
@@ -401,6 +401,12 @@ private:
     static bool ComputeRunBounds(const RunType runs[], int count,
                                  SkIRect* bounds);
 
+    /**
+     *  If the last arg is null, just return if the result is non-empty,
+     *  else store the result in the last arg.
+     */
+    static bool Oper(const SkRegion&, const SkRegion&, SkRegion::Op, SkRegion*);
+
     friend struct RunHead;
     friend class Iterator;
     friend class Spanerator;