What is the direct3d equivalent of glreadpixels

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I am in the middle of porting over my openGL 3d viewer to a DirectX 10 equivalent. I have come across the fact that there is no glReadPixels equivalent. After a lot of searching on the internet I still haven't found an answer. I use the glReadPixels to get z depth of a pixel under the mouse. Does anyone know the DirectX 10 way of doing this? I need a function that takes the mouse coordinates, queries the z buffer, and reports the depth of the pixel.
Thanks.

What I have tried:

I have searched the internet exhaustively and found nothing

Posted 30-May-17 4:16am

trident99

Updated 30-May-17 22:37pm

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barneyman · Accepted Answer · 2017-05-30T22:37:00

Solution 1

in dx9 (sorry, but that should get you started) you'd render to a texture (using SetRenderTarget) then get to that texture's surface (GetSurfaceLevel), then lock that and read from it (LockRect)

Posted 30-May-17 22:37pm

barneyman