Add new experimental API to SkPicture to get "id" of current op

src/core/SkPicturePlayback.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 SkPicturePlayback_DEFINED
 #define SkPicturePlayback_DEFINED
 
@@ skipping 84 matching lines @@
     void dumpSize() const;
 
     bool containsBitmaps() const;
 
 #ifdef SK_BUILD_FOR_ANDROID
     // Can be called in the middle of playback (the draw() call). WIll abort the
     // drawing and return from draw() after the "current" op code is done
     void abort() { fAbortCurrentPlayback = true; }
 #endif
 
+    size_t curOpID() const { return fCurOffset; }
+    void resetOpID() { fCurOffset = 0; }
+
 protected:
     bool parseStream(SkStream*, const SkPictInfo&,
                      SkPicture::InstallPixelRefProc);
     bool parseBuffer(SkReadBuffer& buffer);
 #ifdef SK_DEVELOPER
     virtual bool preDraw(int opIndex, int type);
     virtual void postDraw(int opIndex);
 #endif
 
     void preLoadBitmaps(const SkTDArray<void*>* results);
@@ skipping 142 matching lines @@
         SkTDArray<void*> fOps;
 
     private:
         typedef SkPicture::OperationList INHERITED;
     };
 
     CachedOperationList* fCachedActiveOps;
 
     SkTypefacePlayback fTFPlayback;
     SkFactoryPlayback* fFactoryPlayback;
+
+    // The offset of the current operation when within the draw method
+    size_t fCurOffset;
+
 #ifdef SK_BUILD_FOR_ANDROID
     SkMutex fDrawMutex;
     bool fAbortCurrentPlayback;
 #endif
 };
 
 #endif