CODEWITHSUNDEEP
c++windowsdirectx
Chad
Chad

Reputation: 13

DirectX 11 E_INVALIDARG during device creation

The code for the creation of the d3d11 device and swapchain fails to run on some computers and returns an E_INVALIDARG error. This also differs for computers with the same version of DirectX. I don't seem to find the reason for the different behaviours.

DXGI_MODE_DESC bufferDesc;
ZeroMemory(&bufferDesc, sizeof(DXGI_MODE_DESC));
bufferDesc.Width = width;
bufferDesc.Height = height;
bufferDesc.RefreshRate.Numerator = 60;
bufferDesc.RefreshRate.Denominator = 1;
bufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
bufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
bufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;

DXGI_SWAP_CHAIN_DESC swapChainDesc;
ZeroMemory(&swapChainDesc, sizeof(DXGI_SWAP_CHAIN_DESC));
swapChainDesc.BufferDesc = bufferDesc;
swapChainDesc.SampleDesc.Count = aaCount;
swapChainDesc.SampleDesc.Quality = aaQuality;
swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swapChainDesc.BufferCount = 1;
swapChainDesc.OutputWindow = *hwnd; 
swapChainDesc.Windowed = TRUE; 
swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;

//results in E_INVALIDARG in some cases
hr = D3D11CreateDeviceAndSwapChain(
    nullptr,                        
    D3D_DRIVER_TYPE_HARDWARE,       
    nullptr,                        
    NULL,
    nullptr,
    NULL,
    D3D11_SDK_VERSION,
    &swapChainDesc,
    &SwapChain,                 
    &d3d11Device,               
    nullptr,
    &d3d11DevCon);              

ID3D11Texture2D* BackBuffer;
hr = SwapChain->GetBuffer( 0, __uuidof( ID3D11Texture2D ), (void**)(&BackBuffer) );

hr = d3d11Device->CreateRenderTargetView( BackBuffer, nullptr, &renderTargetView );

Upvotes: 1

Views: 2531

Answers (3)

MuertoExcobito
MuertoExcobito

Reputation: 10049

As discovered from comments, the reason for the device creation failure was an unsupported combination of multisample quality and/or count. This support can be queried after device creation, and before swapchain creation by using the D3D11CreateDevice function, and then ID3D11Device::CheckMultisampleQualityLevels. Afterwards, a swap chain can be created with appropriate parameters.

Also, there is some guaranteed MSAA support based on the feature level, thus, if you require a certain feature level when creating the device, it can also be a way to validate the MSAA parameters (eg. and still using the D3D11CreateDeviceAndSwapChain function). From the CheckMultisampleQualityLevels documentation, this guaranteed support is:

Note that FEATURE_LEVEL_10_1 devices are required to support 4x MSAA for all render targets except R32G32B32A32 and R32G32B32. FEATURE_LEVEL_11_0 devices are required to support 4x MSAA for all render target formats, and 8x MSAA for all render target formats except R32G32B32A32 formats.

Upvotes: 0

Chad
Chad

Reputation: 13

The problem was the high setting for the antialiasing (aaCount, aaQuality), some systems couldn't handle them and therefore failed to create the D3D11Device/Swapchain.

Upvotes: 0

Adam Miles
Adam Miles

Reputation: 3584

Replace the 'Flags' argument (currently NULL) with D3D11_CREATE_DEVICE_DEBUG and you'll get a human readable error message in the output that tells you what's wrong.

Upvotes: 1

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