optimize setRectFan and join -- from profiling drawText

include/core/SkPoint.h

 /*
  * Copyright 2006 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 SkPoint_DEFINED
 #define SkPoint_DEFINED
 
@@ skipping 194 matching lines @@
     void setIRectFan(int l, int t, int r, int b, size_t stride);
 
     // counter-clockwise fan
     void setRectFan(SkScalar l, SkScalar t, SkScalar r, SkScalar b) {
         SkPoint* v = this;
         v[0].set(l, t);
         v[1].set(l, b);
         v[2].set(r, b);
         v[3].set(r, t);
     }
-    void setRectFan(SkScalar l, SkScalar t, SkScalar r, SkScalar b, size_t stride);
+
+    void setRectFan(SkScalar l, SkScalar t, SkScalar r, SkScalar b, size_t stride) {
+        SkASSERT(stride >= sizeof(SkPoint));
+        
+        ((SkPoint*)((intptr_t)this + 0 * stride))->set(l, t);
+        ((SkPoint*)((intptr_t)this + 1 * stride))->set(l, b);
+        ((SkPoint*)((intptr_t)this + 2 * stride))->set(r, b);
+        ((SkPoint*)((intptr_t)this + 3 * stride))->set(r, t);
+    }
+    
 
     static void Offset(SkPoint points[], int count, const SkPoint& offset) {
         Offset(points, count, offset.fX, offset.fY);
     }
 
     static void Offset(SkPoint points[], int count, SkScalar dx, SkScalar dy) {
         for (int i = 0; i < count; ++i) {
             points[i].offset(dx, dy);
         }
     }
@@ skipping 298 matching lines @@
 
     /**
      *  cast-safe way to treat the point as an array of (2) SkScalars.
      */
     const SkScalar* asScalars() const { return &fX; }
 };
 
 typedef SkPoint SkVector;
 
 #endif