gecko-dev/dom/canvas/WebGLParent.h

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 WEBGLPARENT_H_
#define WEBGLPARENT_H_

#include "mozilla/GfxMessageUtils.h"
#include "mozilla/dom/PWebGLParent.h"
#include "mozilla/WeakPtr.h"
#include "mozilla/dom/IpdlQueue.h"

namespace mozilla {

class HostWebGLContext;

namespace layers {
class SharedSurfaceTextureClient;
}

namespace dom {

class WebGLParent : public PWebGLParent,
                    public AsyncProducerActor<WebGLParent>,
                    public SyncConsumerActor<WebGLParent>,
                    public SupportsWeakPtr<WebGLParent> {
  friend PWebGLParent;

 public:
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WebGLParent, override);
  MOZ_DECLARE_WEAKREFERENCE_TYPENAME(WebGLParent)
  using OtherSideActor = WebGLChild;

  mozilla::ipc::IPCResult RecvInitialize(
      const webgl::InitContextDesc&, UniquePtr<HostWebGLCommandSinkP>&& aSinkP,
      UniquePtr<HostWebGLCommandSinkI>&& aSinkI, webgl::InitContextResult* out);

  RefPtr<layers::SharedSurfaceTextureClient> GetVRFrame(webgl::ObjectId);

  // Drain the command queue now.  Used by synchronous IpdlQueue consumers.
  bool RunQueue(uint64_t) { return RunCommandQueue(); }

  // For IPDL:
  WebGLParent();

 private:
  ~WebGLParent();

  bool BeginCommandQueueDrain();
  static bool MaybeRunCommandQueue(const WeakPtr<WebGLParent>& weakWebGLParent);
  bool RunCommandQueue();

  mozilla::ipc::IPCResult RecvUpdateCompositableHandle(
      layers::PLayerTransactionParent* aLayerTransaction,
      const CompositableHandle& aHandle);

  mozilla::ipc::IPCResult Recv__delete__() override;

  void ActorDestroy(ActorDestroyReason aWhy) override;

  UniquePtr<HostWebGLContext> mHost;

  // Runnable that repeatedly processes our WebGL command queue
  RefPtr<Runnable> mRunCommandsRunnable;
};

}  // namespace dom
}  // namespace mozilla

#endif  // WEBGLPARENT_H_