[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/postprocess/effect/CComputeEffect.h

@@ -0,0 +1,63 @@
+/**
+ * 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 "postprocess/CPostProcessor.h"
+
+
+#define POST_PROCESS_THREADS_STR "8"
+
+namespace PostProcessUtil
+{
+  static constexpr unsigned Threads = 8;
+
+  template<typename T>
+  static constexpr T AlignTo(T value, T align)
+  {
+    return (value + (align - 1)) & ~(align - 1);
+  }
+
+  bool CreateDefaultTexture(const ComPtr<ID3D12Device3>& device,
+    const D3D12_RESOURCE_DESC& desc, ComPtr<ID3D12Resource>& resource);
+  bool CreateDefaultBuffer(const ComPtr<ID3D12Device3>& device,
+    UINT64 size, ComPtr<ID3D12Resource>& resource);
+}
+
+class CComputeEffect : public CPostProcessEffect
+{
+protected:
+  ComPtr<ID3D12RootSignature>  m_rootSignature;
+  ComPtr<ID3D12PipelineState>  m_pso;
+  ComPtr<ID3D12DescriptorHeap> m_descHeap;
+  ComPtr<ID3D12Resource>       m_dst;
+  unsigned m_threadsX = 0;
+  unsigned m_threadsY = 0;
+
+  bool InitCompute(const ComPtr<ID3D12Device3>& device,
+    const D3D12_DESCRIPTOR_RANGE * ranges, UINT rangeCount,
+    const D3D12_STATIC_SAMPLER_DESC * samplers, UINT samplerCount,
+    const char * shader);
+
+  void Bind(const ComPtr<ID3D12GraphicsCommandList>& commandList);
+
+  void TransitionDst(const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    D3D12_RESOURCE_STATES before, D3D12_RESOURCE_STATES after);
+};