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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_WEBGPU_MAILBOX_BUFFER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_WEBGPU_MAILBOX_BUFFER_H_
#include "base/functional/callback.h"
#include "base/memory/scoped_refptr.h"
#include "gpu/command_buffer/client/client_shared_image.h"
#include "gpu/command_buffer/common/sync_token.h"
#include "third_party/blink/renderer/platform/graphics/gpu/dawn_control_client_holder.h"
#include "third_party/blink/renderer/platform/graphics/gpu/webgpu_cpp.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/ref_counted.h"
namespace blink {
class DawnControlClientHolder;
class PLATFORM_EXPORT WebGPUMailboxBuffer
: public RefCounted<WebGPUMailboxBuffer> {
public:
static scoped_refptr<WebGPUMailboxBuffer> FromExistingSharedImage(
scoped_refptr<DawnControlClientHolder> dawn_control_client,
const wgpu::Device& device,
const wgpu::BufferDescriptor& desc,
scoped_refptr<gpu::ClientSharedImage> shared_image,
const gpu::SyncToken& sync_token,
base::OnceCallback<void(const gpu::SyncToken&)> finished_access_callback);
~WebGPUMailboxBuffer();
// Dissociates this mailbox buffer from WebGPU. Returns a sync token which
// will satisfy when the mailbox's commands have been fully processed; this
// return value can safely be ignored if the mailbox buffer is not going to
// be accessed further.
gpu::SyncToken Dissociate();
const wgpu::Buffer& GetBuffer();
private:
WebGPUMailboxBuffer(
scoped_refptr<DawnControlClientHolder> dawn_control_client,
const wgpu::Device& device,
const wgpu::BufferDescriptor& desc,
scoped_refptr<gpu::ClientSharedImage> shared_image,
const gpu::SyncToken& sync_token,
base::OnceCallback<void(const gpu::SyncToken&)> finished_access_callback);
scoped_refptr<DawnControlClientHolder> dawn_control_client_;
scoped_refptr<gpu::ClientSharedImage> shared_image_;
std::unique_ptr<gpu::WebGPUBufferScopedAccess> scoped_access_;
base::OnceCallback<void(const gpu::SyncToken&)> finished_access_callback_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_WEBGPU_MAILBOX_BUFFER_H_
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