inline very common intersect+rect_rgn

include/core/SkRegion.h

 
 /*
  * Copyright 2005 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkRegion_DEFINED
@@ skipping 237 matching lines @@
         kLastOp = kReplace_Op
     };
 
     static const int kOpCnt = kLastOp + 1;
 
     /**
      *  Set this region to the result of applying the Op to this region and the
      *  specified rectangle: this = (this op rect).
      *  Return true if the resulting region is non-empty.
      */
-    bool op(const SkIRect& rect, Op op) { return this->op(*this, rect, op); }
+    bool op(const SkIRect& rect, Op op) {
+        if (this->isRect() && kIntersect_Op == op) {
+            if (!fBounds.intersect(rect)) {
+                return this->setEmpty();
+            }
+            return true;
+        }
+        return this->op(*this, rect, op);
+    }
 
     /**
      *  Set this region to the result of applying the Op to this region and the
      *  specified rectangle: this = (this op rect).
      *  Return true if the resulting region is non-empty.
      */
     bool op(int left, int top, int right, int bottom, Op op) {
         SkIRect rect;
         rect.set(left, top, right, bottom);
         return this->op(*this, rect, op);
@@ skipping 174 matching lines @@
     static bool Oper(const SkRegion&, const SkRegion&, SkRegion::Op, SkRegion*);
 
     friend struct RunHead;
     friend class Iterator;
     friend class Spanerator;
     friend class SkRgnBuilder;
     friend class SkFlatRegion;
 };
 
 #endif