add SkDrawPictureCallback optional parameter to drawPicture(), which can abort the picture drawing.

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 48 matching lines @@
 
 class SkPicturePlayback {
 public:
     SkPicturePlayback();
     SkPicturePlayback(const SkPicturePlayback& src, SkPictCopyInfo* deepCopyInfo = NULL);
     explicit SkPicturePlayback(const SkPictureRecord& record, bool deepCopy = false);
     SkPicturePlayback(SkStream*, const SkPictInfo&, SkPicture::InstallPixelRefProc);
 
     virtual ~SkPicturePlayback();
 
-    void draw(SkCanvas& canvas);
+    void draw(SkCanvas& canvas, SkDrawPictureCallback*);
 
     void serialize(SkWStream*, SkPicture::EncodeBitmap) const;
 
     void dumpSize() 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
@@ skipping 139 matching lines @@
 
     SkTypefacePlayback fTFPlayback;
     SkFactoryPlayback* fFactoryPlayback;
 #ifdef SK_BUILD_FOR_ANDROID
     SkMutex fDrawMutex;
     bool fAbortCurrentPlayback;
 #endif
 };
 
 #endif