How to render a texture in DirectX 11 and transfer the texture to regular memory?

Question

I wanna render an image to a texture taking advantage of DirectX acceleration. But instead of showing that image on the screen, I wanna get this image back to the regular memory as a bitmap to do anything with the result. How do I transfer some texture to the regular memory? I am using DirectX 11.

You can find the same problem, and the solution, here. You only need to use DirectX 11 version instead of 10. — enigma
– enigma, Commented Dec 12, 2012 at 15:09
almost there... In fact I want to have ACCESS to the pixels. D3DX10SaveTextureToFile() does it in background of course. But I wanna know how to do it by myself. I think it's something related to Map/Unmap of resources(DX10/DX11), but I couldn't find anything that really works! :-( — Wagner Patriota
– Wagner Patriota, Commented Dec 17, 2012 at 20:49

sandicz · Accepted Answer · 2012-12-19 09:11:02Z

2

You can use a seperate "staging" texture which has cpu read access. Than copy your rendertarget texture to this staging texture with CopySubresource() or CopyResource() an perform Map() to this staging texture.

--> http://msdn.microsoft.com/en-us/library/windows/desktop/ff476259(v=vs.85).aspx

answered Dec 19, 2012 at 9:11

sandicz

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2 Comments

sandicz Over a year ago

Oh, I saw that's the solution in the comments above... I used this several times and it works. Whats your problem with Map/Unmap?

Dimitri Podborski Over a year ago

Any suggestions on how to do it in DirectX 12? It seems that many memory related things have changed there :(

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