add SkRect::intersect(a, b), matching what was already available in SkIRect

git-svn-id: http://skia.googlecode.com/svn/trunk@2513 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 6 insertions, 0 deletions

diff --git a/include/core/SkRect.h b/include/core/SkRect.h
index 1399fbd6c0..76c99df648 100644
--- a/include/core/SkRect.h
+++ b/include/core/SkRect.h
@@ -485,6 +485,12 @@ struct SK_API SkRect {
                fLeft < right && left < fRight &&
                fTop < bottom && top < fBottom;
     }
+
+    /** If rectangles a and b intersect, return true and set this rectangle to
+     *  that intersection, otherwise return false and do not change this
+     *  rectangle. If either rectangle is empty, do nothing and return false.
+     */
+    bool intersect(const SkRect& a, const SkRect& b);
     
     /**
      *  Return true if rectangles a and b are not empty and intersect.