DirectX：无法创建 directx11 设备，即使我的系统说它支持它

Question

我打开 dxdiag 应用程序，select 用于检查支持的功能级别的显示选项卡是结果

今天我的 RAM 不足，因为我的一个芯片坏了，现在我在 2GB 内存上运行

看来我的设备非常支持 directx 功能级别 11

跳转到 visual studio 2019 我尝试创建一个 D3D11 设备

D3D_FEATURE_LEVEL levels[] = {                            //Supported Levels We Want 11 or above
                                D3D_FEATURE_LEVEL_9_1,
                                D3D_FEATURE_LEVEL_9_2,
                                D3D_FEATURE_LEVEL_9_3,
                                D3D_FEATURE_LEVEL_10_0,
                                D3D_FEATURE_LEVEL_10_1,
                                D3D_FEATURE_LEVEL_11_0,
                                D3D_FEATURE_LEVEL_11_1                               
  };
  D3D_FEATURE_LEVEL supported = {};
 
  HRESULT deviceCreate = D3D11CreateDevice(
                                            nullptr                                                         //Use Default Adapter
                                           ,D3D_DRIVER_TYPE_HARDWARE,0                                       //Use Hardware ,no software module provided
                                           ,D3D11_CREATE_DEVICE_BGRA_SUPPORT | D3D11_CREATE_DEVICE_DEBUG     //Flags for device creation
                                           ,levels,ARRAYSIZE(levels),D3D11_SDK_VERSION                       //Feature array,size of array,sdk to use
                                           ,&device,&supported,&context                                      //Created Device,supported level,context
                                          );
  if (FAILED(deviceCreate))
  {
    MessageBox(NULL, L"Failed To Create D3D11 Device", L"Failed DirectX", MB_OK);
    error = 1;
    return;
  }

  switch (supported)
  {
    case D3D_FEATURE_LEVEL_9_1:MessageBox(NULL, L"9_1", L"9_1", MB_OK);
    break;
    case D3D_FEATURE_LEVEL_9_2:MessageBox(NULL, L"9_2", L"9_2", MB_OK);
    break;
    case D3D_FEATURE_LEVEL_9_3:MessageBox(NULL, L"9_3", L"9_3", MB_OK);
    break;
    case D3D_FEATURE_LEVEL_10_0:MessageBox(NULL, L"10_0", L"10_0", MB_OK);
    break;
    case D3D_FEATURE_LEVEL_10_1:MessageBox(NULL, L"10_1", L"10_1", MB_OK);
    break;
    case D3D_FEATURE_LEVEL_11_0:MessageBox(NULL, L"11_0", L"11_0", MB_OK);
    break;
    case D3D_FEATURE_LEVEL_11_1:MessageBox(NULL, L"11_1", L"11_1", MB_OK);
  }

输出：

我查看了我的制造商网站和 windows 更新，但都说您已经安装了最新的驱动程序。任何帮助将不胜感激

Answer 1

正如评论中所建议的那样，删除支持的最低功能级别，即 9_1 就是答案。

来自文档，如果特征级别数组为空则默认数组

D3D_FEATURE_LEVEL levels[] = {                            
                                D3D_FEATURE_LEVEL_9_1,
                                D3D_FEATURE_LEVEL_9_2,
                                D3D_FEATURE_LEVEL_9_3,
                                D3D_FEATURE_LEVEL_10_0,
                                D3D_FEATURE_LEVEL_10_1,
                                D3D_FEATURE_LEVEL_11_0,
                                D3D_FEATURE_LEVEL_11_1                               
  };

与我传递的数组相同，设备会检查支持哪些功能级别，但 IN ORDER 和 FIRST 返回数组中支持的功能级别[不是最适合您的设备]

所以只要颠倒数组并将特征级别 11 放在数组的第一位就是答案

DirectX：无法创建 directx11 设备，即使我的系统说它支持它

DirectX : cannot create an directx11 device even though my system says it supports it

c++

visual-studio-2019

directx-11