initial preroll api

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 1322 matching lines @@
             name.printf("sample_grab_%d.png", gSampleGrabCounter++);
             SkImageEncoder::EncodeFile(name.c_str(), bmp,
                                        SkImageEncoder::kPNG_Type, 100);
         }
     }
 
     if (kPicture_DeviceType == fDeviceType) {
         SkAutoTUnref<const SkPicture> picture(fRecorder.endRecording());
 
         if (true) {
+            picture->preroll(NULL, NULL, NULL, NULL);
+        }
+
+        if (true) {
             this->installDrawFilter(orig);
             
             if (true) {
                 SkImageInfo info;
                 size_t rowBytes;
                 void* addr = orig->accessTopLayerPixels(&info, &rowBytes);
                 if (addr) {
                     SkSurface* surfs[4];
                     SkMultiPictureDraw md;
 
@@ skipping 1075 matching lines @@
     setenv("ANDROID_ROOT", "/android/device/data", 0);
 #endif
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
     SkGraphics::Term();
 }