Add a means of extracting active operations from SkPicture

src/core/SkPicture.cpp

 
 /*
  * Copyright 2007 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.
  */
 
 
 #include "SkPictureFlat.h"
@@ skipping 246 matching lines @@
     if (NULL == fPlayback) {
         if (NULL != fRecord) {
             fRecord->endRecording();
             fPlayback = SkNEW_ARGS(SkPicturePlayback, (*fRecord));
             SkSafeSetNull(fRecord);
         }
     }
     SkASSERT(NULL == fRecord);
 }
 
+const SkPicture::OperationList& SkPicture::OperationList::InvalidList() {
+    static OperationList gInvalid;
+    return gInvalid;
+}
+
+const SkPicture::OperationList& SkPicture::EXPERIMENTAL_getActiveOps(const SkIRect& queryRect) {
+    this->endRecording();
+    if (NULL != fPlayback) {
+        return fPlayback->getActiveOps(queryRect);
+    }
+    return OperationList::InvalidList();
+}
+
 void SkPicture::draw(SkCanvas* surface, SkDrawPictureCallback* callback) {
     this->endRecording();
     if (NULL != fPlayback) {
         fPlayback->draw(*surface, callback);
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "SkStream.h"
@@ skipping 165 matching lines @@
 }
 
 #ifdef SK_BUILD_FOR_ANDROID
 void SkPicture::abortPlayback() {
     if (NULL == fPlayback) {
         return;
     }
     fPlayback->abort();
 }
 #endif