Unbinding shader resources

Question

If you want to unbind a shader resource in directx11, all code I've found does something along these lines:

ID3D10ShaderResourceView* nullSRV[1] = {nullptr};
context->PSSetShaderResources(0, 1, &nullSRV);

Why not simply use this?

context->PSSetShaderResources(0, 0, nullptr);

It seems supported by the docs (https://msdn.microsoft.com/en-us/library/windows/desktop/ff476473%28v=vs.85%29.aspx), is there really any difference between the two?

Resolve

And be clear you are not unbinding all shader resources, just the first slot. – Sphagnum

While I do agree the second form would be better (or even better - a PSResetShaderResources() or something like that), unfortunately there is nothing in that MSDN link that says it is supported. Since I believe many would try to do what you wanted to do, it would be great if the docs were explicit about that invalid code not being allowed and what is the correct way to unbind a resource. @Chuck Walbourn, what do you think? – Rastus

Answer 1

In the first case, you are unbinding one SRV, starting in slot zero. In the second case, you are not unbinding anything because NumViews is zero. If you wanted to unbind in the second case, you'd have to use:

context->PSSetShaderResources(0, 1, nullptr);

However, this will cause the runtime to crash:

D3D11 CORRUPTION: ID3D11DeviceContext::PSSetShaderResources: Third parameter corrupt or unexpectedly NULL. [ MISCELLANEOUS CORRUPTION #15: CORRUPTED_PARAMETER3]

This is why the first form is used.

Amphibolite