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POHow can I determine which displays are attached to the same physical device using Direct3D9?
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copied!<p>Using Direct3D9, I can count the available adapters using <code>IDirect3D9::GetAdapterCount()</code>. However, this returns the number of outputs, i.e. 2 for a single dual-head graphics card. Using Win32 API, I can enumerate the display devices and the monitors attached using the following snippet:</p> <pre><code>DISPLAY_DEVICE displayDevice; ::ZeroMemory(&displayDevice, sizeof(displayDevice)); displayDevice.cb = sizeof(displayDevice); /* Enumerate adapters. */ for (UINT i = 0; ::EnumDisplayDevices(NULL, i, &displayDevice, 0); i++) { /* Enumerate the monitors. */ for (UINT j = 0; ::EnumDisplayDevices(displayDevice.DeviceName, j, &displayDevice, 0); j++) { // Do stuff here } } </code></pre> <p>My questions are: Is there an equivalent for this in D3D, which also works correctly if I create the D3D device afterwards using <code>D3DCREATE_ADAPTERGROUP_DEVICE</code>? If not, are there any assumptions I can make about the enumeration order of the devices which I can use to match the Win32 API results to D3D adapters? In other words: Is the Direct3D adapter 0 guaranteed to be the first adapter returned by <code>EnumDisplayDevices</code>?</p> <p>Addition: I just found out, that I could match the device name from <code>D3DADAPTER_IDENTIFIER9</code> to the device name of Win32. However, is there a way to get just the physical devices from D3D in the first place?</p>

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