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RenderDoc - Weird output signatures

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When debugging an app to figure out a bug, I saw this:

 

uzSVrzf.png

 

And in my opinion this seems strange, why would it only use those specific channels in the output signature ( which are the complete opposite of what was used in the input signature )?

 

Or perhaps I'm misinterpreting what I'm seeing.

 

Thank you.

Edited by Migi0027 =A=

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Judging from the source code, looks like a 1:1 a dump from D3D shader reflection. "Used" in that view seems to be [tt]ReadWriteMask[/tt] from D3D11_SIGNATURE_PARAMETER_DESC. It's actually confusing (quoting the docs):
 

Mask which indicates whether a given component is never written (if the signature is an output signature) or always read (if the signature is an input signature).


Emphasis mine. Flags or bools with negative meaning are bad wacko.png

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