如何创建交换链格式DXGI\u format\u 420\u不透明?

之前 swapchain 设置为 RGB32

所以我改变了 swapChain 格式设置为 DXGI_FORMAT_420_OPAQUE .

DXGI_SWAP_CHAIN_DESC1 swapChainDesc = { 0 };

swapChainDesc.Width = 0; 
swapChainDesc.Height = 0;
swapChainDesc.Format = DXGI_FORMAT_420_OPAQUE;// DXGI_FORMAT_B8G8R8A8_UNORM
swapChainDesc.Stereo = false;
swapChainDesc.SampleDesc.Count = 1;
swapChainDesc.SampleDesc.Quality = 0; 
swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swapChainDesc.BufferCount = 2; 
swapChainDesc.Scaling = DXGI_SCALING_STRETCH;
swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
swapChainDesc.Flags = 0;


dxgiFactory->CreateSwapChainForHwnd(_direct3DDevice, _hwnd, &swapChainDesc, nullptr, nullptr, &_DXGISwapChain);


IDXGISurface *dxgiBackBuffer;
_DXGISwapChain->GetBuffer(0, IID_PPV_ARGS(&dxgiBackBuffer));

然后在 dxgiBackBuffer 我得到一个 NullReferenceException

我认为您不能根据 yv12 format .

你知道我是不是错了吗?