Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
2,761 questions
Why is there a problem with the DXGI_USAGE flag regardless of what I set it to?
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CDev-8220
300
Reputation points
My IDXGIFactory2::CreateSwapChainForComposition fails every time with the following error:
DXGI ERROR: IDXGIFactory::CreateSwapChain: The BufferUsage field of the swapchain description contains some DXGI_USAGE flags that are not supported. DXGI_SWAP_CHAIN_DESC{ SwapChainType = ..._Composition, BufferDesc = DXGI_MODE_DESC1{Width = 320, Height = 200, RefreshRate = DXGI_RATIONAL{ Numerator = 0, Denominator = 1 }, Format = B8G8R8A8_UNORM, ScanlineOrdering = ..._UNSPECIFIED, Scaling = ..._UNSPECIFIED, Stereo = FALSE }, SampleDesc = DXGI_SAMPLE_DESC{ Count = 1, Quality = 0 }, BufferUsage = 0xb, BufferCount = 3, OutputWindow = 0x0000000000000000, Scaling = ..._STRETCH, Windowed = TRUE, SwapEffect = ..._FLIP_SEQUENTIAL, AlphaMode = ..._PREMULTIPLIED, Flags = 0x0 } [ MISCELLANEOUS ERROR #114: ]
Why are none of the DXGI_USAGE flags supported?
Windows API - Win32
{count} votes
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Darran Rowe 1,616 Reputation points2025-04-03T18:17:34.3266667+00:00 Well, the BufferUsage field is showing that it has the value 0xb. This is an invalid value. How are you assigning this?
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CDev-8220 300 Reputation points
2025-04-03T18:47:36.43+00:00 I'm filling the fields after a few checks, including GetDisplayModeList1.
m_SwapChainDesc1.AlphaMode = DXGI_ALPHA_MODE_PREMULTIPLIED; m_SwapChainDesc1.BufferCount = 3; m_SwapChainDesc1.Flags = 0; m_SwapChainDesc1.Width = m_displayMode.width; m_SwapChainDesc1.Height = m_displayMode.height; m_SwapChainDesc1.Stereo = m_displayMode.Stereo; m_SwapChainDesc1.SampleDesc.Count = 1; m_SwapChainDesc1.SampleDesc.Quality = 0; m_SwapChainDesc1.Scaling = DXGI_SCALING_STRETCH; m_SwapChainDesc1.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL; m_SwapChainDesc1.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;Is that bad practice?
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Darran Rowe 1,616 Reputation points
2025-04-03T21:02:10.6366667+00:00 The issue here is that the error you provided shows that BufferUsage is set to 0xb. DXGI_USAGE_RENDER_TARGET_OUTPUT has a value of 0x20.
Double check your error message, if the error you previously posted is still the error that you are getting, then your DXGI_SWAP_CHAIN_DESC1 structure is getting corrupted somewhere.
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CDev-8220 300 Reputation points
2025-04-04T13:47:50.07+00:00 Okay thanks.
There was some code that wasn't working as I thought it should.
That's where the problem occurred. It's solved now, thanks.
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