chromium/third_party/blink/renderer/platform/graphics/gpu/dawn_control_client_holder.h

// Copyright 2019 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_DAWN_CONTROL_CLIENT_HOLDER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_DAWN_CONTROL_CLIENT_HOLDER_H_

#include <dawn/dawn_proc_table.h>

#include <vector>

#include "gpu/command_buffer/client/webgpu_interface.h"
#include "third_party/blink/renderer/platform/graphics/gpu/webgpu_cpp.h"
#include "third_party/blink/renderer/platform/graphics/gpu/webgpu_resource_provider_cache.h"
#include "third_party/blink/renderer/platform/graphics/web_graphics_context_3d_provider_wrapper.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/ref_counted.h"

namespace base {

class SingleThreadTaskRunner;

}  // namespace base

namespace blink {

namespace scheduler {
class EventLoop;
}  // namespace scheduler

// This class holds the WebGraphicsContext3DProviderWrapper and a strong
// reference to the WebGPU APIChannel.
// DawnControlClientHolder::Destroy() should be called to destroy the
// context which will free all command buffer and GPU resources. As long
// as the reference to the APIChannel is held, calling WebGPU procs is
// valid.
class PLATFORM_EXPORT DawnControlClientHolder
    : public RefCounted<DawnControlClientHolder> { … };

// Slightly hacky way to get the wgslLanguageFeatures without accessing the
// DawnControlClient because it is initialized asynchronously on workers.
// TODO(crbug.com/1246805): Remove this hack when the DawnControlClient can be
// initialized synchronously on workers and query from its wgpu::Instance
// instead.
PLATFORM_EXPORT std::vector<wgpu::WGSLFeatureName> GatherWGSLFeatures();

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_DAWN_CONTROL_CLIENT_HOLDER_H_