Implement vertex buffer caching in the tessellated path renderer.

include/core/SkPath.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 SkPath_DEFINED
 #define SkPath_DEFINED
 
@@ skipping 901 matching lines @@
 
 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
     static const int kPathRefGenIDBitCnt = 30; // leave room for the fill type (skbug.com/1762)
 #else
     static const int kPathRefGenIDBitCnt = 32;
 #endif
 
     SkDEBUGCODE(void validate() const;)
     SkDEBUGCODE(void experimentalValidateRef() const { fPathRef->validate(); } )
 
+    SkPathRef* pathRef() const { return fPathRef; }
+
 private:
     enum SerializationOffsets {
         // 1 free bit at 29
         kUnused1_SerializationShift = 28,    // 1 free bit
         kDirection_SerializationShift = 26, // requires 2 bits
         kIsVolatile_SerializationShift = 25, // requires 1 bit
         // 1 free bit at 24
         kConvexity_SerializationShift = 16, // requires 8 bits
         kFillType_SerializationShift = 8,   // requires 8 bits
         // low-8-bits are version
@@ skipping 69 matching lines @@
     void setPt(int index, SkScalar x, SkScalar y);
 
     friend class SkAutoPathBoundsUpdate;
     friend class SkAutoDisableOvalCheck;
     friend class SkAutoDisableDirectionCheck;
     friend class SkBench_AddPathTest; // perf test reversePathTo
     friend class PathTest_Private; // unit test reversePathTo
 };
 
 #endif