why Resource Barrier need before state?

Asked Aug 04 '22 at 16:42

Active Aug 04 '22 at 16:42

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I am very very sorry for my poor english. I have a question about directx 12 D3D12_RESOURCE_TRANSITION_BARRIER.

typedef struct D3D12_RESOURCE_TRANSITION_BARRIER {
  ID3D12Resource        *pResource;
  UINT                  Subresource;
  D3D12_RESOURCE_STATES StateBefore;
  D3D12_RESOURCE_STATES StateAfter;
} D3D12_RESOURCE_TRANSITION_BARRIER;

I think GPU will knows resource's state because StateAfter.

What's the purpose of StateBefore ?

asked Aug 04 '22 at 16:42

user754458

With no prior knowledge, looks like for performance reasons: https://www.youtube.com/watch?v=nmB2XMasz2o – Caramiriel Aug 04 '22 at 16:57
no. it's about how to tracking StateBefore in multithread env. – user754458 Aug 04 '22 at 17:48

why Resource Barrier need before state?

0 Answers0