WebGLChild.h - mozsearch

Enable keyboard shortcuts

/* -*- 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 WEBGLCHILD_H_

#define WEBGLCHILD_H_

#include "mozilla/dom/PWebGLChild.h"

#include "mozilla/ipc/BigBuffer.h"

#include "mozilla/Maybe.h"

#include "mozilla/WeakPtr.h"

#include <string>

namespace mozilla {

class ClientWebGLContext;

namespace dom {

struct FlushedCmdInfo final {

  size_t flushes = 0;

  // Store a number of flushes since last IPC congestion check.

  // It is reset to 0, when current IPC congestion check is done.

  size_t flushesSinceLastCongestionCheck = 0;

  // Incremented for each IPC congestion check.

  size_t congestionCheckGeneration = 0;

  size_t flushedCmdBytes = 0;

  size_t overhead = 0;

};

class WebGLChild final : public PWebGLChild, public SupportsWeakPtr {

  const WeakPtr<ClientWebGLContext> mContext;

  const size_t mDefaultCmdsShmemSize;

  mozilla::ipc::BigBuffer mPendingCmdsShmem;

  size_t mPendingCmdsPos = 0;

  size_t mPendingCmdsAlignmentOverhead = 0;

  FlushedCmdInfo mFlushedCmdInfo;

 public:

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WebGLChild, override);

  explicit WebGLChild(ClientWebGLContext&);

  Maybe<Range<uint8_t>> AllocPendingCmdBytes(size_t,

                                             size_t fyiAlignmentOverhead);

  void FlushPendingCmds();

  void Destroy();

  void ActorDestroy(ActorDestroyReason why) override;

  FlushedCmdInfo& GetFlushedCmdInfo() { return mFlushedCmdInfo; }

 private:

  friend PWebGLChild;

  virtual ~WebGLChild();

 public:

  mozilla::ipc::IPCResult RecvJsWarning(const std::string&) const;

  mozilla::ipc::IPCResult RecvOnContextLoss(webgl::ContextLossReason) const;

  mozilla::ipc::IPCResult RecvOnSyncComplete(webgl::ObjectId) const;

};

}  // namespace dom

}  // namespace mozilla

#endif  // WEBGLCHILD_H_