CommandBuffer.h - mozsearch

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/* -*- 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 GPU_CommandBuffer_H_

#define GPU_CommandBuffer_H_

#include "mozilla/WeakPtr.h"

#include "mozilla/webgpu/WebGPUTypes.h"

#include "nsWrapperCache.h"

#include "ObjectModel.h"

namespace mozilla::webgpu {

class CanvasContext;

class Device;

class CommandBuffer final : public ObjectBase, public ChildOf<Device> {

 public:

  GPU_DECL_CYCLE_COLLECTION(CommandBuffer)

  GPU_DECL_JS_WRAP(CommandBuffer)

  CommandBuffer(Device* const aParent, RawId aId,

                nsTArray<WeakPtr<CanvasContext>>&& aPresentationContexts,

                RefPtr<CommandEncoder>&& aEncoder);

  Maybe<RawId> Commit();

 private:

  CommandBuffer() = delete;

  ~CommandBuffer();

  void Cleanup();

  const RawId mId;

  const nsTArray<WeakPtr<CanvasContext>> mPresentationContexts;

  // Command buffers and encoders share the same identity (this is a

  // simplifcation currently made by wgpu). To avoid dropping the same ID twice,

  // the wgpu resource lifetime is tied to the encoder which is held alive by

  // the command buffer.

  RefPtr<CommandEncoder> mEncoder;

};

}  // namespace mozilla::webgpu

#endif  // GPU_CommandBuffer_H_