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// 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_MODULES_WEBGPU_DAWN_OBJECT_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGPU_DAWN_OBJECT_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.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/heap/member.h"
#include "third_party/blink/renderer/platform/heap/visitor.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace gpu {
namespace webgpu {
class WebGPUInterface;
} // namespace webgpu
} // namespace gpu
namespace blink {
namespace scheduler {
class EventLoop;
} // namespace scheduler
class GPUDevice;
// This class allows objects to hold onto a DawnControlClientHolder.
// The DawnControlClientHolder is used to hold the WebGPUInterface and keep
// track of whether or not the client has been destroyed. If the client is
// destroyed, we should not call any Dawn functions.
class DawnObjectBase {
public:
explicit DawnObjectBase(
scoped_refptr<DawnControlClientHolder> dawn_control_client,
const String& label);
const scoped_refptr<DawnControlClientHolder>& GetDawnControlClient() const;
base::WeakPtr<WebGraphicsContext3DProviderWrapper> GetContextProviderWeakPtr()
const {
return dawn_control_client_->GetContextProviderWeakPtr();
}
// Ensure commands up until now on this object's parent device are flushed by
// the end of the task.
void EnsureFlush(scheduler::EventLoop& event_loop);
// Flush commands up until now on this object's parent device immediately.
void FlushNow();
// GPUObjectBase mixin implementation
const String& label() const { return label_; }
void setLabel(const String& value);
virtual void SetLabelImpl(const String& value) = 0;
private:
scoped_refptr<DawnControlClientHolder> dawn_control_client_;
String label_;
};
class DawnObjectImpl : public ScriptWrappable, public DawnObjectBase {
public:
explicit DawnObjectImpl(GPUDevice* device, const String& label);
~DawnObjectImpl() override;
const wgpu::Device& GetDeviceHandle() const;
GPUDevice* device() { return device_.Get(); }
void Trace(Visitor* visitor) const override;
protected:
Member<GPUDevice> device_;
};
template <typename Obj>
class DawnObject : public DawnObjectImpl {
public:
DawnObject(GPUDevice* device, Obj handle, const String& label)
: DawnObjectImpl(device, label),
device_handle_(GetDeviceHandle()),
handle_(std::move(handle)) {}
const Obj& GetHandle() const { return handle_; }
private:
// All WebGPU Blink objects created directly or by the Device hold a
// Member<GPUDevice> which keeps the device alive. However, this does not
// enforce that the GPUDevice is finalized after all objects referencing it.
// Declare the device as a member first before the object to ensure that the
// Dawn device is destroyed last.
// TODO(enga): Investigate removing Member<GPUDevice>.
const wgpu::Device device_handle_;
const Obj handle_;
};
template <>
class DawnObject<wgpu::Device> : public DawnObjectBase {
public:
const wgpu::Device& GetHandle() const { return handle_; }
protected:
// Support setting the handle after creation to allow for GPUDevice's
// two-step initialization.
using DawnObjectBase::DawnObjectBase;
void SetHandle(wgpu::Device handle) { handle_ = std::move(handle); }
private:
wgpu::Device handle_;
};
template <>
class DawnObject<wgpu::Adapter> : public DawnObjectBase {
public:
DawnObject(scoped_refptr<DawnControlClientHolder> dawn_control_client,
wgpu::Adapter handle,
const String& label)
: DawnObjectBase(dawn_control_client, label),
handle_(std::move(handle)) {}
const wgpu::Adapter& GetHandle() const { return handle_; }
private:
const wgpu::Adapter handle_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGPU_DAWN_OBJECT_H_
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