Refactor SkPicturePlayback for SkPictureReplacementPlayback

src/core/SkPicturePlayback.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPicturePlayback_DEFINED
 #define SkPicturePlayback_DEFINED
 
 #include "SkPictureFlat.h"  // for DrawType
+#include "SkPictureStateTree.h"
 
 class SkBitmap;
 class SkCanvas;
 class SkDrawPictureCallback;
 class SkPaint;
 class SkPictureData;
 
 class SkPicturePlayback : SkNoncopyable {
 public:
     SkPicturePlayback(const SkPicture* picture)
@@ skipping 67 matching lines @@
 
     bool   fUseBBH;
     PlaybackReplacements* fReplacements;
 
     void handleOp(SkReader32* reader, 
                   DrawType op, 
                   uint32_t size, 
                   SkCanvas* canvas,
                   const SkMatrix& initialMatrix);
 
+    const SkPicture::OperationList* getActiveOps(const SkCanvas* canvas);
+    bool initIterator(SkPictureStateTree::Iterator* iter, 
+                      SkCanvas* canvas,
+                      const SkPicture::OperationList *activeOpsList);
+    static void StepIterator(SkPictureStateTree::Iterator* iter, SkReader32* reader);
+    static void SkipIterTo(SkPictureStateTree::Iterator* iter, 
+                           SkReader32* reader, uint32_t skipTo);
+    bool replaceOps(SkPictureStateTree::Iterator* iter, 
+                    SkReader32* reader, 
+                    SkCanvas* canvas,
+                    const SkMatrix& initialMatrix);
+
     static DrawType ReadOpAndSize(SkReader32* reader, uint32_t* size);
 
     class AutoResetOpID {
     public:
         AutoResetOpID(SkPicturePlayback* playback) : fPlayback(playback) { }
         ~AutoResetOpID() {
             if (NULL != fPlayback) {
                 fPlayback->resetOpID();
             }
         }
 
     private:
         SkPicturePlayback* fPlayback;
     };
 
 private:
     typedef SkNoncopyable INHERITED;
 };
 
 #endif