[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/capture/CFrameBufferPool.cpp

@@ -0,0 +1,51 @@
+/**
+ * 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
+ */
+
+#include "capture/CFrameBufferPool.h"
+
+#include <stdint.h>
+
+void CFrameBufferPool::Init(
+  CFrameTransport * transport, CD3D12Device * dx12)
+{
+  m_transport = transport;
+  m_dx12      = dx12;
+}
+
+void CFrameBufferPool::Reset()
+{
+  for (int i = 0; i < ARRAYSIZE(m_buffers); ++i)
+    m_buffers[i].Reset();
+}
+
+CFrameBufferResource * CFrameBufferPool::Get(
+  const PreparedFrameBuffer& buffer,
+  size_t minSize, const D3D12_RESOURCE_DESC * textureDesc)
+{
+  if (buffer.frameIndex > ARRAYSIZE(m_buffers) - 1)
+    return nullptr;
+
+  CFrameBufferResource * fbr = &m_buffers[buffer.frameIndex];
+  if (!fbr->Init(m_transport, m_dx12, buffer.frameIndex, buffer.mem,
+      minSize, textureDesc))
+    return nullptr;
+
+  return fbr;
+}