public ImGuiRenderer(ID3D11Device device, ID3D11DeviceContext deviceContext)
{
this.device = device;
this.deviceContext = deviceContext;
device.AddRef();
deviceContext.AddRef();
var io = ImGui.GetIO();
io.BackendFlags |= ImGuiBackendFlags.RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
CreateDeviceObjects();
}