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c++directxcomobject

The correct pointer to a D3D11device vtable

How do I get a pointer to the vtable in this:

ID3D11Device *dev;          //the pointer to the device interface

This is what I have right now and I don't think it's right. 

uintptr_t* pInterfaceVTable = *(uintptr_t**)dev;

If it is, then how do I get the member functions? Again, this is what I have right now.

uintptr_t** g_deviceFunctionAddresses = new uintptr_t*[D3D11_DEVICE_METHOD_COUNT];
if(dev != NULL && swapchain != NULL){
    for(int i=0; i<D3D11_DEVICE_METHOD_COUNT; i++){
        g_deviceFunctionAddresses[i] = (uintptr_t*)pInterfaceVTable[i];
    }
    smplvtablefunction = pInterfaceVTable[functionoffset];
}

I've been stuck for a while on this.

Solution

  • The vtable is defined in the header as ID3D11DeviceVtbl. You need to #include d3d11.h as a C header though, otherwise you get the class definition with a hidden vtable.