170326C++DirectX12の初期化 - DXSampleHelper.h

DXSampleHelper.h

//*********************************************************
//
// Copyright (c) Microsoft. All rights reserved.
// This code is licensed under the MIT License (MIT).
// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
//
//*********************************************************

#pragma once

inline void ThrowIfFailed(HRESULT hr)
{
    if (FAILED(hr))
    {
        throw std::exception();
    }
}

inline void GetAssetsPath(_Out_writes_(pathSize) WCHAR* path, UINT pathSize)
{
    if (path == nullptr)
    {
        throw std::exception();
    }

    DWORD size = GetModuleFileName(nullptr, path, pathSize);
    if (size == 0 || size == pathSize)
    {
        // Method failed or path was truncated.
        throw std::exception();
    }

    WCHAR* lastSlash = wcsrchr(path, L'\\');
    if (lastSlash)
    {
        *(lastSlash + 1) = L'\0';
    }
}

inline HRESULT ReadDataFromFile(LPCWSTR filename, byte** data, UINT* size)
{
    using namespace Microsoft::WRL;

    CREATEFILE2_EXTENDED_PARAMETERS extendedParams = {};
    extendedParams.dwSize = sizeof(CREATEFILE2_EXTENDED_PARAMETERS);
    extendedParams.dwFileAttributes = FILE_ATTRIBUTE_NORMAL;
    extendedParams.dwFileFlags = FILE_FLAG_SEQUENTIAL_SCAN;
    extendedParams.dwSecurityQosFlags = SECURITY_ANONYMOUS;
    extendedParams.lpSecurityAttributes = nullptr;
    extendedParams.hTemplateFile = nullptr;

    Wrappers::FileHandle file(CreateFile2(filename, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, &extendedParams));
    if (file.Get() == INVALID_HANDLE_VALUE)
    {
        throw std::exception();
    }

    FILE_STANDARD_INFO fileInfo = {};
    if (!GetFileInformationByHandleEx(file.Get(), FileStandardInfo, &fileInfo, sizeof(fileInfo)))
    {
        throw std::exception();
    }

    if (fileInfo.EndOfFile.HighPart != 0)
    {
        throw std::exception();
    }

    *data = reinterpret_cast<byte*>(malloc(fileInfo.EndOfFile.LowPart));
    *size = fileInfo.EndOfFile.LowPart;

    if (!ReadFile(file.Get(), *data, fileInfo.EndOfFile.LowPart, nullptr, nullptr))
    {
        throw std::exception();
    }

    return S_OK;
}

// Assign a name to the object to aid with debugging.
#if defined(_DEBUG)
inline void SetName(ID3D12Object* pObject, LPCWSTR name)
{
    pObject->SetName(name);
}
inline void SetNameIndexed(ID3D12Object* pObject, LPCWSTR name, UINT index)
{
    WCHAR fullName[50];
    if (swprintf_s(fullName, L"%s[%u]", name, index) > 0)
    {
        pObject->SetName(fullName);
    }
}
#else
inline void SetName(ID3D12Object*, LPCWSTR)
{
}
inline void SetNameIndexed(ID3D12Object*, LPCWSTR, UINT)
{
}
#endif

// Naming helper for ComPtr<T>.
// Assigns the name of the variable as the name of the object.
// The indexed variant will include the index in the name of the object.
#define NAME_D3D12_OBJECT(x) SetName(x.Get(), L#x)
#define NAME_D3D12_OBJECT_INDEXED(x, n) SetNameIndexed(x[n].Get(), L#x, n)