[idd] driver: implement postprocess filters

idd/LGIdd/CPostProcessor.h

@@ -0,0 +1,84 @@
+/**
+ * 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.
+ */
+
+#pragma once
+
+#include <Windows.h>
+#include <wrl/client.h>
+#include <d3d12.h>
+#include <dxgi1_5.h>
+#include <memory>
+#include <vector>
+
+struct CD3D12Device;
+
+extern "C" {
+  #include "common/types.h"
+}
+
+using namespace Microsoft::WRL;
+
+enum class PostProcessStatus
+{
+  SUCCESS,
+  BYPASS_EFFECT,
+  FAILED
+};
+
+struct D12FrameFormat
+{
+  D3D12_RESOURCE_DESC desc = {};
+  unsigned            width = 0;
+  unsigned            height = 0;
+  FrameType           format = FRAME_TYPE_INVALID;
+  bool                hdr = false;
+  bool                hdrPQ = false;
+};
+
+class CPostProcessEffect
+{
+public:
+  virtual ~CPostProcessEffect() {}
+  virtual const char * GetName() const = 0;
+  virtual PostProcessStatus SetFormat(const ComPtr<ID3D12Device3>& device,
+    const D12FrameFormat& src, D12FrameFormat& dst) = 0;
+  virtual void AdjustDamage(RECT dirtyRects[], unsigned * nbDirtyRects) { UNREFERENCED_PARAMETER(dirtyRects); UNREFERENCED_PARAMETER(nbDirtyRects); }
+  virtual ComPtr<ID3D12Resource> Run(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
+    unsigned * nbDirtyRects) = 0;
+  bool Enabled = false;
+};
+
+class CPostProcessor
+{
+private:
+  std::shared_ptr<CD3D12Device> m_dx12Device;
+  ComPtr<ID3D12Device3> m_device;
+  std::vector<std::unique_ptr<CPostProcessEffect>> m_effects;
+  D12FrameFormat m_srcFormat = {};
+  D12FrameFormat m_dstFormat = {};
+  bool m_effectsActive = false;
+
+public:
+  bool Init(std::shared_ptr<CD3D12Device> dx12Device);
+  void Reset();
+
+  bool Configure(const D12FrameFormat& srcFormat, bool * formatChanged);
+  void AdjustFrameDamage(RECT dirtyRects[], unsigned * nbDirtyRects);
+  ComPtr<ID3D12Resource> Run(
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
+    unsigned * nbDirtyRects);
+
+  const D12FrameFormat& GetOutputFormat() const { return m_dstFormat; }
+  bool HasActiveEffects() const { return m_effectsActive; }
+};