add interp path

include/core/SkPathRef.h

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPathRef_DEFINED
 #define SkPathRef_DEFINED
@@ skipping 253 matching lines @@
     /**
      * Writes the path points and verbs to a buffer.
      */
     void writeToBuffer(SkWBuffer* buffer) const;
 
     /**
      * Gets the number of bytes that would be written in writeBuffer()
      */
     uint32_t writeSize() const;
 
+    void interpolate(const SkPathRef& ending, SkScalar weight, SkPathRef* out) const;
+
     /**
      * Gets an ID that uniquely identifies the contents of the path ref. If two path refs have the
      * same ID then they have the same verbs and points. However, two path refs may have the same
      * contents but different genIDs.
      */
     uint32_t genID() const;
 
     struct GenIDChangeListener {
         virtual ~GenIDChangeListener() {}
         virtual void onChange() = 0;
@@ skipping 213 matching lines @@
     SkBool8  fIsOval;
     SkBool8  fIsRRect;
     uint8_t  fSegmentMask;
 
     friend class PathRefTest_Private;
     friend class ForceIsRRect_Private; // unit test isRRect
     typedef SkRefCnt INHERITED;
 };
 
 #endif