I need to read back a GPU texture via a staging ID3D11Texture, running in a Microsoft Store application.

I am reading from a D3D11ShaderResourceView defined in the cResource variable below. Code follows:

		ID3D11Texture2D* pTextureInterface = 0;
		ID3D11Resource* res;
		HRESULT hr = 0;
	
		ID3D11Texture2D* tx = 0;
		
		ID3D11Device* dv;
		deviceContext->GetDevice(&dv);

		cResource->GetResource(&res);
		hr = res->QueryInterface<ID3D11Texture2D>(&pTextureInterface);
		D3D11_TEXTURE2D_DESC desc;
		pTextureInterface->GetDesc(&desc);

		desc.Usage = D3D11_USAGE_STAGING;
		desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
		desc.BindFlags = 0;

		hr = dv->CreateTexture2D(&desc, nullptr, &tx);
		deviceContext->CopyResource(tx, pTextureInterface);


		D3D11_MAPPED_SUBRESOURCE mapped = { 0 };
		hr = deviceContext->Map(tx, 0, D3D11_MAP_READ, 0, &mapped);
		
		...

The Map() function fails with an E_INVALIDARG.

I turned on Debug Layers and there are no specific Warnings nor Errors in the VS Window for all these code.

If I also try to save this texture using the DirectX::SaveWICTextureToFile function in the https://github.com/microsoft/DirectXTex/blob/5f22c7cc39241515f026269014678c157dc3dd9b/ScreenGrab/ScreenGrab11.cpp​ sample, inside this function the Map() function fails as well without any warnings nor Errors.

The GetDesc() function gives me a valid D3D11_TEXTURE2D_DESC for that texture.

What could be wrong?

Thanks!

I figured out the problem. I was trying to do a Map on a Staging texture from a D3D11_DEVICE_CONTEXT_DEFERRED context.

Switching to a D3D11_DEVICE_CONTEXT_IMMEDIATE works perfect. Thanks