/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_layers_FrameUniformityData_h_

#define mozilla_layers_FrameUniformityData_h_

#include "ipc/IPCMessageUtils.h"

#include "js/TypeDecls.h"

#include "mozilla/RefPtr.h"

namespace mozilla {

namespace layers {

class Layer;

class FrameUniformityData {

  friend struct IPC::ParamTraits<FrameUniformityData>;

public:

  bool ToJS(JS::MutableHandleValue aOutValue, JSContext* aContext);

  // Contains the calculated frame uniformities

  std::map<uintptr_t,float> mUniformities;

};

struct LayerTransforms {

  LayerTransforms() {}

  gfx::Point GetAverage();

  gfx::Point GetStdDev();

  // 60 fps * 5 seconds worth of data

  AutoTArray<gfx::Point, 300> mTransforms;

};

class LayerTransformRecorder {

public:

  LayerTransformRecorder() {}

  ~LayerTransformRecorder();

  void RecordTransform(Layer* aLayer, const gfx::Point& aTransform);

  void Reset();

  void EndTest(FrameUniformityData* aOutData);

private:

  float CalculateFrameUniformity(uintptr_t aLayer);

  LayerTransforms* GetLayerTransforms(uintptr_t aLayer);

  std::map<uintptr_t,LayerTransforms*> mFrameTransforms;

};

} // namespace layers

} // namespace mozilla

namespace IPC {

template<>

struct ParamTraits<mozilla::layers::FrameUniformityData>

{

  typedef mozilla::layers::FrameUniformityData paramType;

  static void Write(Message* aMsg, const paramType& aParam)

  {

    WriteParam(aMsg, aParam.mUniformities);

  }

  static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)

  {

    return ParamTraitsStd<std::map<uintptr_t,float>>::Read(aMsg, aIter, &aResult->mUniformities);

  }

};

} // namespace IPC

#endif // mozilla_layers_FrameUniformityData_h_