add backdrop option to SaveLayerRec

samplecode/SampleApp.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleApp.h"
 
 #include "OverView.h"
@@ skipping 1378 matching lines @@
         SkAutoTUnref<const SkPicture> picture(fRecorder.endRecording());
         SkFILEWStream stream("sample_app.skp");
         picture->serialize(&stream);
         fSaveToSKP = false;
         this->inval(nullptr);
         return;
     }
 
     if (fUseMPD) {
         SkAutoTUnref<const SkPicture> picture(fRecorder.endRecording());
+
+        if (false) {
+            SkDynamicMemoryWStream wstream;
+            picture->serialize(&wstream);
+
+            SkAutoTDelete<SkStream> rstream(wstream.detachAsStream());
+            picture.reset(SkPicture::CreateFromStream(rstream));
+        }
+
         if (true) {
             if (true) {
                 SkImageInfo info;
                 size_t rowBytes;
                 void* addr = orig->accessTopLayerPixels(&info, &rowBytes);
                 if (addr) {
                     SkSurface* surfs[4];
                     SkMultiPictureDraw md;
 
                     SkImageInfo n = SkImageInfo::Make(info.width()/2, info.height()/2,
@@ skipping 1056 matching lines @@
 #ifdef SK_BUILD_FOR_MAC
     setenv("ANDROID_ROOT", "/android/device/data", 0);
 #endif
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
 }