/* -*- 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 _include_mozilla_gfx_ipc_CompositorOptions_h_
#define _include_mozilla_gfx_ipc_CompositorOptions_h_

namespace IPC {
template <typename>
struct ParamTraits;
}  // namespace IPC

namespace mozilla {
namespace layers {

/**
 * This class holds options that are "per compositor" - that is, these options
 * affect a particular CompositorBridgeParent and all the content that it
 * renders.
 *
 * This class is intended to be created by a platform widget (but NOT
 * PuppetWidget) and passed to the graphics code during initialization of the
 * top level compositor associated with that widget. The options are immutable
 * after creation. The CompositorBridgeParent holds the canonical version of
 * the options, but they may be accessed by other parts of the code as needed,
 * and are accessible to content processes over PCompositorBridge as well.
 */
class CompositorOptions {
 public:
  // This constructor needed for IPDL purposes, don't use it anywhere else.
  CompositorOptions()
      : mUseAPZ(false), mUseWebRender(false), mUseAdvancedLayers(false) {}

  explicit CompositorOptions(bool aUseAPZ, bool aUseWebRender)
      : mUseAPZ(aUseAPZ),
        mUseWebRender(aUseWebRender),
        mUseAdvancedLayers(false) {}

  bool UseAPZ() const { return mUseAPZ; }
  bool UseWebRender() const { return mUseWebRender; }
  bool UseAdvancedLayers() const { return mUseAdvancedLayers; }

  void SetUseAdvancedLayers(bool aUseAdvancedLayers) {
    mUseAdvancedLayers = aUseAdvancedLayers;
  }

  bool operator==(const CompositorOptions& aOther) const {
    return mUseAPZ == aOther.mUseAPZ && mUseWebRender == aOther.mUseWebRender &&
           mUseAdvancedLayers == aOther.mUseAdvancedLayers;
  }

  friend struct IPC::ParamTraits<CompositorOptions>;

 private:
  bool mUseAPZ;
  bool mUseWebRender;
  bool mUseAdvancedLayers;

  // Make sure to add new fields to the ParamTraits implementation
};

}  // namespace layers
}  // namespace mozilla

#endif  // _include_mozilla_gfx_ipc_CompositorOptions_h_