2 replies to this topic

[zerorepent]

Hi!
I am trying to use direct2d in directx11.1 with feature level 11, however i quickly run into problems, when creating a directx10.1 device you use D3D10CreateDevice1, however a similar function for directx11.1 doesn't seem to exist. I look at this example http://msdn.microsof...9(v=vs.85).aspx however they use ComPtr's, And I am not that familiar with using them,

They declare

ComPtr<ID3D11Device> device;
ComPtr<ID3D11DeviceContext> context;

uses the regular D3D11CreateDevice function, and then uses

DX::ThrowIfFailed(
		device.As(&m_d3dDevice)
		);

where m_d3dDevice is a ID3D11Device1. Is that a regular typecast (in the ComPtr way)? If so is it safe to do use

m_d3dDevice= (ID3D11Device1*)(device);

I do not use ComPtrs in my project, so in this example above both are "regular" pointers.

[mhagain]

You should be able to get it by using the regular D3D11CreateDevice, then QueryInterface to get the Device1 interface; something like this (error checking omitted):

ID3D11Device *d3d11_Device;
ID3D11Device1 *d3d11_Device1;

// create d3d11_Device as normal, then
d3d11_Device->QueryInterface (__uuidof (ID3D11Device1), (void **) &d3d11_Device1);

// throw away the original device
d3d11_Device->Release ();

Disclaimer/fair warning: I haven't tested this with ID3D11Device1 myself, but I do use it with IDXGIDevice1, and it's standard procedure for cases where a DX interface isn't exposed via a Create method (e.g. IDirectSoundBuffer8).

[zerorepent]

Thanks! It works perfectly for the Id3d11Device1, but fails on the id3d11devicecontext1. I guess thats because I use featurelevel 11 and not 11.1 so I don't think thats an issue ^^.