Function ovr_Create

Revive/REV_CAPI.cpp:206–256

}

OVR_PUBLIC_FUNCTION(ovrResult) ovr_Create(ovrSession* pSession, ovrGraphicsLuid* pLuid)
{
	REV_TRACE(ovr_Create);

	if (!pSession)
		return ovrError_InvalidParameter;

	*pSession = nullptr;

	// Initialize the opaque pointer with our own OpenVR-specific struct
	g_Sessions.emplace_back();

	// Get the LUID for the OpenVR adapter
	uint64_t adapter;
	vr::VRSystem()->GetOutputDevice(&adapter, vr::TextureType_DirectX);
	if (adapter)
	{
		// Copy the LUID into the structure
		static_assert(sizeof(adapter) == sizeof(ovrGraphicsLuid),
			"The adapter LUID needs to fit in ovrGraphicsLuid");
		if (pLuid)
			memcpy(pLuid, &adapter, sizeof(ovrGraphicsLuid));
	}
	else
	{
		// Fall-back to the default adapter
		IDXGIFactory1* pFactory = nullptr;
		if (FAILED(CreateDXGIFactory1(__uuidof(IDXGIFactory1), (void**)&pFactory)))
			return ovrError_RuntimeException;

		IDXGIAdapter1* pAdapter = nullptr;
		if (FAILED(pFactory->EnumAdapters1(0, &pAdapter)))
			return ovrError_RuntimeException;

		DXGI_ADAPTER_DESC1 desc;
		if (FAILED(pAdapter->GetDesc1(&desc)))
			return ovrError_RuntimeException;

		// Copy the LUID into the structure
		static_assert(sizeof(desc.AdapterLuid) == sizeof(ovrGraphicsLuid),
			"The adapter LUID needs to fit in ovrGraphicsLuid");
		if (pLuid)
			memcpy(pLuid, &desc.AdapterLuid, sizeof(ovrGraphicsLuid));
	}

	// Oculus games expect a seated tracking space by default
	vr::VRCompositor()->SetTrackingSpace(vr::TrackingUniverseSeated);

	*pSession = &g_Sessions.back();
	return ovrSuccess;
}

OVR_PUBLIC_FUNCTION(void) ovr_Destroy(ovrSession session)
{