/* -*- 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_GFX_RENDERCOMPOSITOR_OGL_H
#define MOZILLA_GFX_RENDERCOMPOSITOR_OGL_H

#include "mozilla/webrender/RenderCompositor.h"

namespace mozilla {

namespace wr {

class RenderCompositorOGL : public RenderCompositor {
 public:
  static UniquePtr<RenderCompositor> Create(
      RefPtr<widget::CompositorWidget>&& aWidget);

  RenderCompositorOGL(RefPtr<gl::GLContext>&& aGL,
                      RefPtr<widget::CompositorWidget>&& aWidget);
  virtual ~RenderCompositorOGL();

  bool BeginFrame(layers::NativeLayer* aNativeLayer) override;
  void EndFrame() override;
  bool WaitForGPU() override;
  void Pause() override;
  bool Resume() override;

  gl::GLContext* gl() const override { return mGL; }

  bool UseANGLE() const override { return false; }

  LayoutDeviceIntSize GetBufferSize() override;

 protected:
  void InsertFrameDoneSync();

  RefPtr<gl::GLContext> mGL;

  // The native layer that we're currently rendering to, if any.
  // Non-null only between BeginFrame and EndFrame if BeginFrame has been called
  // with a non-null aNativeLayer.
  RefPtr<layers::NativeLayer> mCurrentNativeLayer;

  // Used to apply back-pressure in WaitForGPU().
  GLsync mPreviousFrameDoneSync;
  GLsync mThisFrameDoneSync;
};

}  // namespace wr
}  // namespace mozilla

#endif