Add refcnting to SkClipStack on SkCanvas

include/core/SkClipStack.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkClipStack_DEFINED
 #define SkClipStack_DEFINED
 
 #include "SkDeque.h"
 #include "SkPath.h"
 #include "SkRect.h"
 #include "SkRRect.h"
 #include "SkRegion.h"
 #include "SkTDArray.h"
 #include "SkTLazy.h"
 
 class SkCanvasClipVisitor;
 
 // Because a single save/restore state can have multiple clips, this class
 // stores the stack depth (fSaveCount) and clips (fDeque) separately.
 // Each clip in fDeque stores the stack state to which it belongs
 // (i.e., the fSaveCount in force when it was added). Restores are thus
 // implemented by removing clips from fDeque that have an fSaveCount larger
 // then the freshly decremented count.
-class SK_API SkClipStack {
+class SK_API SkClipStack : public SkNVRefCnt<SkClipStack> {
 public:
     enum BoundsType {
         // The bounding box contains all the pixels that can be written to
         kNormal_BoundsType,
         // The bounding box contains all the pixels that cannot be written to.
         // The real bound extends out to infinity and all the pixels outside
         // of the bound can be written to. Note that some of the pixels inside
         // the bound may also be writeable but all pixels that cannot be
         // written to are guaranteed to be inside.
         kInsideOut_BoundsType
@@ skipping 438 matching lines @@
      */
     void restoreTo(int saveCount);
 
     /**
      * Return the next unique generation ID.
      */
     static int32_t GetNextGenID();
 };
 
 #endif