DirectX11 How to CreateTexture2D from unsigned char * data

Question

I have a function GetCamImage that returns the image from camera as:

unsigned char* p = GetCamImage(...);

I need to create ID3D11Texture2D from this data. How can I do it in DirectX 11?

Thanks

Answer 1

It depends on what the format of the actual content in that p is, as well as the width, height, and stride. Assuming the image is an RGBA 32-bit format with simple byte pitch alignment and sized as w by h, then it would be something simple like:

D3D11_SUBRESOURCE_DATA initData = {0};
initData.pSysMem = (const void*)p;
initData.SysMemPitch = w * 4;
initData.SysMemSlicePitch = h * w * 4;

D3D11_TEXTURE2D_DESC desc;
desc.Width = w;
desc.Height = h;
desc.MipLevels = 1;
desc.ArraySize = 1;
desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
desc.SampleDesc.Count = 1;
desc.SampleDesc.Quality = 0;
desc.Usage = D3D11_USAGE_DEFAULT;
desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
desc.CPUAccessFlags = 0;

ID3D11Texture2D* tex = nullptr;
HRESULT hr = d3dDevice->CreateTexture2D( &desc, &initData, &tex );
if (FAILED(hr))
   ...