c++ - 如何正确填充 SwapChain Struct 以使用 Mulitsampling？

Question

您好，我刚开始使用 CoreWindow^ + C++/CLI 下的 DirectX，在我想开始使用多重采样之前一切似乎都正常。这个例子是渲染简单的三角形

Working example without AA

当我像这样填充 SwapChain 结构时:

UINT m4xMsaaQuality;


dev->CheckMultisampleQualityLevels(DXGI_FORMAT_B8G8R8A8_UNORM,4, &m4xMsaaQuality);


// set up the swap chain description
DXGI_SWAP_CHAIN_DESC1 scd = { 0 };

scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;    // how the swap chain should be used
scd.BufferCount =2;      

scd.Format = DXGI_FORMAT_B8G8R8A8_UNORM;              // the most common swap chain format
scd.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;    // the recommended flip mode
scd.SampleDesc.Count = 4;                             // >1 enable anti-aliasing
scd.SampleDesc.Quality = m4xMsaaQuality-1;

CoreWindow^ Window = CoreWindow::GetForCurrentThread();    // get the window pointer

                                                           // create the swap chain
dxgiFactory->CreateSwapChainForCoreWindow(
    dev.Get(),                                  // address of the device
    reinterpret_cast<IUnknown*>(Window),        // address of the window
    &scd,                                       // address of the swap chain description
    nullptr,                                    // advanced
    &swapchain);                                // address of the new swap chain pointer



    // get a pointer directly to the back buffer
    ComPtr<ID3D11Texture2D> backbuffer;
    swapchain->GetBuffer(0, __uuidof(ID3D11Texture2D), (&backbuffer));`

dxgiFactory->CreateSwapChainForCoreWindow(
dev.Get(),                                  // address of the device
reinterpret_cast<IUnknown*>(Window),        // address of the window
&scd,                                       // address of the swap chain description
nullptr,                                    // advanced
&swapchain);

返回“空指针”，

我检查过 m4xMsaaQuality 等于“17”，所以 scd.SampleDesc.Quality =16

我应该如何填充 SwapChain 结构？

Answer 1

翻转交换效果与多重采样表面不兼容。您需要创建一个非 msaa 交换链并将您的 msaa 渲染显式解析到交换链缓冲区。