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Nov
27
Written by:
Jeremiah Morrill
11/27/2009 11:22 AM
 For a while, I’ve wanted to tackle getting the newest Direct3D technologies to interop with WPF. Direct3D 10/11 and Direct2D all have very cool usage scenarios that are just impossible with the WPF API.
So far the only solutions I have seen to interop WPF and it’s cousin D3D technologies was to use hWnd interop. If you gotta have airspace restrictions, why even bother? Nobody really wants a hot, steamy, always-on-top hWnd hovering over their super cool WPF interface. So how do we render D3D10/11 and D2D into WPF w/o airspace issues? We only have a D3DImage class that supports Direct3D9. Well the fine people of the WPF team informed me that a IDirect3DDevice9Ex, which is the recommended device to use with D3DImage in Vista/7, supports sharing resources between devices (and processes too if you care). We can create a shared render target on Direct3D10/11, then pull it in via an intermediate IDirect3DDevice9Ex device. No copying required! This resource we pull into 9Ex, can then be sent to the D3DImage for high performance rendering. I have not benchmarked anything, but just eyeing CPU performance, it does not seem to have any extra overhead in sharing the resources. Performance seems to be similar (if not the same) to using D3DImage with 9Ex and unshared surfaces. I’ve created a D3DImage subclass to add support for D3D 10/11 render targets (Texture2D). Usage is simple: 1: /* Set the back buffer, which is a ID3D10Texture2D pointer */ 2: m_d3DImageEx.SetBackBufferEx(D3DResourceTypeEx.ID3D10Texture2D, pRenderTarget);
One caveat is the D3D 10/11 render targets must be created as D3D10_RESOURCE_MISC_SHARED. The other caveat is I don’t handle lost devices (which only happens in a few situations with 9Ex, like driver being upgraded) just yet so I don’t recommend using this in production at the moment.
Also the D3D10 scene code is very sloppy and was pieced together from other samples. It’s also in C++, but I’ll do some managed examples later on.
To compile make sure you have the latest DirectX SDK and Windows SDK!
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24 comment(s) so far...
Re: Direct3D 10/11 & Direct2D in WPF
Hi,
I tried to use your code but i get an exception (0x80070057) for the method 'CreateTexture2D'.
I don't know why the param "DXGI_FORMAT_B8G8R8A8_UNORM" isn't support.
I have Vista SP2 DirectX 11
By romain on
12/6/2009 6:19 AM
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Re: Direct3D 10/11 & Direct2D in WPF
Did you install the sdks listed above? I think you also need the dx11 for vista addon
By Jeremiah Morrill on
12/6/2009 12:53 PM
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Re: Direct3D 10/11 & Direct2D in WPF
try DXGI_FORMAT_R8G8B8A8_UNORM RGBA insted of BGRA
By alive on
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Re: Direct3D 10/11 & Direct2D in WPF
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By Hailee on
12/16/2009 4:47 AM
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Tried Direct2D
Thank you Jeremiah, your intuition did throw some light in the very confused world of MS APIs...
What about Direct2D, have you succedeed in getting rendered some content and pulling it using the same method?
Thank you,
Stefano
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12/30/2009 2:31 PM
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I'm getting an exception, trying to create a SharedHandle for DX11 Surface. Is there any workarounds rof this issue?
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Hi,
Do you have a completly managed C# sample of the above code yet by any chance,
Thanks,
WArd
By Ward on
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