include/dawn/native/D3D12Backend.h

// Copyright 2018 The Dawn & Tint Authors
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#ifndef INCLUDE_DAWN_NATIVE_D3D12BACKEND_H_
#define INCLUDE_DAWN_NATIVE_D3D12BACKEND_H_

#include <d3d12.h>
#include <dxgi1_4.h>
#include <wrl/client.h>

#include "dawn/native/D3DBackend.h"

struct ID3D12Device;
struct ID3D12Resource;

namespace dawn::native::d3d12 {

class Device;

enum MemorySegment {
    Local,
    NonLocal,
};

DAWN_NATIVE_EXPORT Microsoft::WRL::ComPtr<ID3D12Device> GetD3D12Device(WGPUDevice device);

DAWN_NATIVE_EXPORT uint64_t SetExternalMemoryReservation(WGPUDevice device,
                                                         uint64_t requestedReservationSize,
                                                         MemorySegment memorySegment);

// May be chained on SharedBufferMemoryDescriptor
struct DAWN_NATIVE_EXPORT SharedBufferMemoryD3D12ResourceDescriptor : wgpu::ChainedStruct {
    SharedBufferMemoryD3D12ResourceDescriptor() {
        sType = static_cast<wgpu::SType>(WGPUSType_SharedBufferMemoryD3D12ResourceDescriptor);
    }

    // This ID3D12Resource object must be created from the same ID3D12Device used in the
    // WGPUDevice.
    Microsoft::WRL::ComPtr<ID3D12Resource> resource;
};

}  // namespace dawn::native::d3d12

#endif  // INCLUDE_DAWN_NATIVE_D3D12BACKEND_H_