[idd] project: organize driver sources by responsibility

Group the IDD sources and Visual Studio filters by subsystem.

Split the device and swap-chain implementations into focused units,
rename the context classes, and reduce header coupling.

idd/LGIdd/d3d/CInteropResourcePool.h

@@ -0,0 +1,47 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#pragma once
+
+#include <Windows.h>
+#include <wdf.h>
+#include <wrl.h>
+#include <d3d11_4.h>
+#include "d3d/CInteropResource.h"
+
+using namespace Microsoft::WRL;
+
+class CInteropResourcePool
+{
+private:
+  static constexpr unsigned POOL_SIZE = 10;
+
+  CInteropResource m_pool[POOL_SIZE];
+
+  std::shared_ptr<CD3D11Device> m_dx11Device;
+  std::shared_ptr<CD3D12Device> m_dx12Device;
+
+public:
+  void Init(std::shared_ptr<CD3D11Device> dx11Device,
+    std::shared_ptr<CD3D12Device> dx12Device);
+  void Reset();
+
+  CInteropResource * Get(ComPtr<ID3D11Texture2D> srcTex);
+};