C++获取机器显卡信息

QtCreator中新建一个空项目，添加一个main.cpp内容如下：

#include 
#include 
#include 

#pragma comment(lib, "dxgi.lib")

std::string WStringToString(const std::wstring &wstr)
{
    std::string str(wstr.length(), ' ');
    std::copy(wstr.begin(), wstr.end(), str.begin());
    return str;
}

int main()
{
    // 参数定义
    IDXGIFactory * pFactory;
    IDXGIAdapter * pAdapter;
    std::vector  vAdapters;  // 显卡
    int iAdapterNum = 0;                    // 显卡的数量

    // 创建一个DXGI工厂
    HRESULT hr = CreateDXGIFactory(__uuidof(IDXGIFactory), (void**)(&pFactory));

    if (FAILED(hr)) {
        return -1;
    }

    // 枚举适配器
    while (pFactory->EnumAdapters(iAdapterNum, &pAdapter) != DXGI_ERROR_NOT_FOUND) {
        vAdapters.push_back(pAdapter);
        ++iAdapterNum;
    }

    // 信息输出
    std::cout << "===============获取到" << iAdapterNum << "块显卡===============" << std::endl;
    for (size_t i = 0; i < vAdapters.size(); i++)
    {
        // 获取信息
        DXGI_ADAPTER_DESC adapterDesc;
        vAdapters[i]->GetDesc(&adapterDesc);
        std::wstring aa(adapterDesc.Description);
        std::string bb = WStringToString(aa);
        // 输出显卡信息
        std::cout << "系统视频内存:" << adapterDesc.DedicatedSystemMemory / 1024 / 1024 << "M" << std::endl;
        std::cout << "专用视频内存:" << adapterDesc.DedicatedVideoMemory / 1024 / 1024 << "M" << std::endl;
        std::cout << "共享系统内存:" << adapterDesc.SharedSystemMemory / 1024 / 1024 << "M" << std::endl;
        std::cout << "设备描述:" << bb.c_str() << std::endl;
    }
    vAdapters.clear();

    system("pause");
    return 0;
}