src/dawn/native/d3d12/BackendD3D12.h

// Copyright 2019 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
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#ifndef SRC_DAWN_NATIVE_D3D12_BACKENDD3D12_H_
#define SRC_DAWN_NATIVE_D3D12_BACKENDD3D12_H_

#include <string>
#include <variant>
#include <vector>

#include "src/dawn/native/BackendConnection.h"
#include "src/dawn/native/d3d/BackendD3D.h"
#include "src/dawn/native/d3d12/d3d12_platform.h"

namespace dawn::native::d3d12 {

class PlatformFunctions;

// If DXC version information is not available due to no DXC binary or error occurs when acquiring
// version, DxcUnavailable indicates the version information being unavailable and holds the
// detailed error information.
struct DxcUnavailable {
    std::string ErrorMessage;
};

class Backend final : public d3d::Backend {
  public:
    explicit Backend(InstanceBase* instance);

    MaybeError Initialize();
    MaybeError EnsureDXC();
    ComPtr<IDxcLibrary> GetDxcLibrary() const;
    ComPtr<IDxcCompiler3> GetDxcCompiler() const;
    ComPtr<IDxcValidator> GetDxcValidator() const;

    const PlatformFunctions* GetFunctions() const;

    // Creates an ID3D12Device for the given adapter via PlatformFunctions::CreateDevice().
    ResultOrError<ComPtr<ID3D12Device>> CreateD3DDevice(IUnknown* adapter);

  protected:
    ResultOrError<Ref<PhysicalDeviceBase>> CreatePhysicalDeviceFromIDXGIAdapter(
        ComPtr<IDXGIAdapter> dxgiAdapter) override;

  private:
    ComPtr<IDxcLibrary> mDxcLibrary;
    ComPtr<IDxcCompiler3> mDxcCompiler;
    ComPtr<IDxcValidator> mDxcValidator;

    using Base = d3d::Backend;
};

}  // namespace dawn::native::d3d12

#endif  // SRC_DAWN_NATIVE_D3D12_BACKENDD3D12_H_