This CL adds client.toDataURL which gets the contents...

core/cross/client.cc

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 37 matching lines @@
 #include "core/cross/tree_traversal.h"
 #include "core/cross/draw_pass.h"
 #include "core/cross/bounding_box.h"
 #include "core/cross/bitmap.h"
 #include "core/cross/error.h"
 #include "core/cross/evaluation_counter.h"
 #include "core/cross/id_manager.h"
 #include "core/cross/profiler.h"
 #include "utils/cross/string_writer.h"
 #include "utils/cross/json_writer.h"
+#include "utils/cross/dataurl.h"
 
 #ifdef OS_WIN
 #include "core/cross/core_metrics.h"
 #endif
 
 using std::map;
 using std::vector;
 using std::make_pair;
 
 namespace o3d {
@@ skipping 326 matching lines @@
 }
 
 void Client::SetErrorTexture(Texture* texture) {
   renderer_->SetErrorTexture(texture);
 }
 
 void Client::InvalidateAllParameters() {
   evaluation_counter_->InvalidateAllParameters();
 }
 
-bool Client::SaveScreen(const String& file_name) {
+String Client::ToDataURL() {
   if (!renderer_.IsAvailable()) {
     O3D_ERROR(service_locator_) << "No Render Device Available";
-    return false;
+    return dataurl::kEmptyDataURL;
   } else {
-    return renderer_->SaveScreen(file_name);
+    return renderer_->ToDataURL();
   }
 }
 
 String Client::GetMessageQueueAddress() const {
   if (message_queue_.get()) {
     return message_queue_->GetSocketAddress();
   } else {
     O3D_ERROR(service_locator_) << "Message queue not initialized";
     return String("");
   }
@@ skipping 30 matching lines @@
 }
 
 String Client::ProfileToString() {
   StringWriter string_writer(StringWriter::LF);
   JsonWriter json_writer(&string_writer, 2);
   profiler_->Write(&json_writer);
   json_writer.Close();
   return string_writer.ToString();
 }
 }  // namespace o3d