CODEWITHSUNDEEP
windowsdirectxdirect3d11dxgi
Dean
Dean

Reputation: 6958

Do I need CreateSharedHandle to pass a ID3D11Texture2D to another thread?

As the title says: do I need to use CreateSharedHandle to pass a ID3D11Texture2D generated in a thread to another thread in the same process?

My use case is that each thread would use the texture with its own device created on the same adapter.

Upvotes: 1

Views: 1325

Answers (1)

Roman Ryltsov
Roman Ryltsov

Reputation: 69706

Quoting Surface Sharing Between Windows Graphics APIs:

Synchronized shared surfaces enable multi-threaded, in-process and out-of-process usage of multiple rendering devices used by Direct3D 10.1, Direct2D and Direct3D 11 APIs. [...]

DXGI 1.1 Synchronized Shared Surfaces

Direct3D 11, Direct3D 10.1 and Direct2D APIs all use DXGI 1.1, which provides the functionality to synchronize reading from and writing to the same video memory surface (DXGISurface1) by two or more Direct3D devices. The rendering devices using synchronized shared surfaces can be Direct3D 10.1 or Direct3D 11 devices, each running in the same process or cross-processes.

Your use of synchronized surfaces/textures enable you to use them in a multi-threaded concurrent execution environment. However, you don't have to enable this mechanism just use a texture on another thread. You have to do it for another reason though:

...each thread would use the texture with its own device created on the same adapter.

Textures belong to their devices so you have to enable sharing in order to have multiple devices working with shared texture data.

Upvotes: 2

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