text: // Copyright (c) 2013 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "cc/debug/traced_picture.h"
  
  #include "base/json/json_writer.h"
  #include "base/strings/stringprintf.h"
  #include "base/values.h"
  
  namespace cc {
  
  TracedPicture::TracedPicture(scoped_refptr<const Picture> picture)
      : picture_(picture), is_alias_(false) {}
  
  TracedPicture::~TracedPicture() {
  }
  
  scoped_refptr<base::debug::ConvertableToTraceFormat>
  TracedPicture::AsTraceablePicture(const Picture* picture) {
    return scoped_refptr<base::debug::ConvertableToTraceFormat>(
        new TracedPicture(picture));
  }
  
  scoped_refptr<base::debug::ConvertableToTraceFormat>
  TracedPicture::AsTraceablePictureAlias(const Picture* original) {
    scoped_refptr<TracedPicture> ptr = new TracedPicture(original);
    ptr->is_alias_ = true;
    return scoped_refptr<base::debug::ConvertableToTraceFormat>(ptr);
  }
  
  void TracedPicture::AppendAsTraceFormat(std::string* out) const {
    if (is_alias_)
      AppendPictureAlias(out);
    else
      AppendPicture(out);
  }
  
  void TracedPicture::AppendPictureAlias(std::string* out) const {
    scoped_ptr<base::DictionaryValue> alias(new base::DictionaryValue());
    alias->SetString("id_ref", base::StringPrintf("%p", picture_.get()));
  
    scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue());
    res->Set("alias", alias.release());
  
    std::string tmp;
    base::JSONWriter::Write(res.get(), &tmp);
    out->append(tmp);
  }
  
  void TracedPicture::AppendPicture(std::string* out) const {
    scoped_ptr<base::Value> value = picture_->AsValue();
    std::string tmp;
    base::JSONWriter::Write(value.get(), &tmp);
    out->append(tmp);
  }
  
  }  // namespace cc
  