add roundOut()

git-svn-id: http://skia.googlecode.com/svn/trunk@2019 2bbb7eff-a529-9590-31e7-b0007b416f81

include/core/SkRect.h

@@ -566,6 +566,18 @@ struct SK_API SkRect {
                  SkScalarCeil(fRight), SkScalarCeil(fBottom));
     }
 
+    /**
+     *  Expand this rectangle by rounding its coordinates "out", choosing the
+     *  floor of top and left, and the ceil of right and bottom. If this rect
+     *  is already on integer coordinates, then it will be unchanged.
+     */
+    void roundOut() {
+        this->set(SkScalarFloorToScalar(fLeft),
+                  SkScalarFloorToScalar(fTop),
+                  SkScalarCeilToScalar(fRight),
+                  SkScalarCeilToScalar(fBottom));
+    }
+
     /**
      *  Swap top/bottom or left/right if there are flipped (i.e. if width()
      *  or height() would have returned a negative value.) This should be called