[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/CD3D12CommandQueue.h

@@ -0,0 +1,179 @@
+/**
+ * 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 <d3d12.h>
+#include <atomic>
+#include <stdint.h>
+
+using namespace Microsoft::WRL;
+using namespace Microsoft::WRL::Wrappers;
+using namespace Microsoft::WRL::Wrappers::HandleTraits;
+
+class CD3D12CommandQueue;
+
+class CD3D12CommandSlot
+{
+  friend class CD3D12CommandQueue;
+
+  private:
+    enum State
+    {
+      STATE_FREE,
+      STATE_RECORDING,
+      STATE_CANCELLING,
+      STATE_SUBMITTED,
+      STATE_COMPLETING,
+      STATE_FAILED,
+    };
+
+    struct FenceWait
+    {
+      ComPtr<ID3D12Fence> fence;
+      UINT64              value = 0;
+    };
+
+    static const UINT MAX_FENCE_WAITS = 2;
+
+    const WCHAR          * m_name  = nullptr;
+    CD3D12CommandQueue   * m_queue = nullptr;
+    ComPtr<ID3D12CommandAllocator   > m_allocator;
+    ComPtr<ID3D12GraphicsCommandList> m_gfxList;
+    ComPtr<ID3D12CommandList        > m_cmdList;
+
+    std::atomic<State>        m_state       = STATE_FREE;
+    std::atomic<bool>         m_submitted   = false;
+    HandleT<HANDLENullTraits> m_event;
+    HandleT<HANDLENullTraits> m_availableEvent;
+    HANDLE                    m_waitHandle  = INVALID_HANDLE_VALUE;
+    bool                      m_needsReset  = false;
+    UINT64                    m_fenceTarget = 0;
+
+    FenceWait m_fenceWaits[MAX_FENCE_WAITS];
+    UINT      m_fenceWaitCount = 0;
+
+    typedef void (*CompletionFunction)(CD3D12CommandSlot * slot,
+      bool result, void * param1, void * param2);
+
+    CompletionFunction m_completionCallback  = nullptr;
+    void             * m_completionParams[2] = {};
+    bool               m_completionResult    = true;
+
+    UINT   m_queryBase          = 0;
+    bool   m_timingActive       = false;
+    UINT64 m_timestampFrequency = 0;
+    UINT64 m_calibrationGPU     = 0;
+    UINT64 m_calibrationCPU     = 0;
+
+    bool Init(ID3D12Device3 * device, CD3D12CommandQueue * queue,
+      const WCHAR * name, UINT queryBase, ULONG waitFlags);
+    void DeInit();
+    void OnCompletion(bool timeout);
+
+  public:
+    enum CallbackMode
+    {
+      FAST,
+      NORMAL,
+    };
+
+    ~CD3D12CommandSlot() { DeInit(); }
+
+    bool Acquire();
+    void Cancel();
+    bool Execute();
+
+    bool BeginTiming();
+    void EndTiming();
+    bool GetGPUTimes(uint64_t& start, uint64_t& end) const;
+
+    bool WaitFor(ID3D12Fence * fence, UINT64 value);
+    bool WaitFor(const CD3D12CommandSlot& slot);
+
+    void SetCompletionCallback(CompletionFunction fn,
+      void * param1, void * param2)
+    {
+      m_completionCallback  = fn;
+      m_completionParams[0] = param1;
+      m_completionParams[1] = param2;
+    }
+
+    bool IsIdle() const
+    {
+      const State state = m_state.load(std::memory_order_acquire);
+      return state == STATE_FREE ||
+        (state == STATE_FAILED &&
+         !m_submitted.load(std::memory_order_acquire));
+    }
+
+    bool HasSubmittedWork() const
+    {
+      return m_submitted.load(std::memory_order_acquire);
+    }
+
+    ComPtr<ID3D12GraphicsCommandList> GetGfxList() { return m_gfxList; }
+};
+
+class CD3D12CommandQueue
+{
+  friend class CD3D12CommandSlot;
+
+  private:
+    static const UINT MAX_SLOTS = 2;
+
+    const WCHAR * m_name = nullptr;
+
+    ComPtr<ID3D12CommandQueue> m_queue;
+    ComPtr<ID3D12Fence       > m_fence;
+    UINT64                     m_fenceValue     = 0;
+    SRWLOCK                    m_submitLock     = SRWLOCK_INIT;
+    std::atomic<bool>          m_failed         = false;
+
+    CD3D12CommandSlot m_slots[MAX_SLOTS];
+    UINT              m_slotCount = 0;
+
+    ComPtr<ID3D12QueryHeap> m_timestampHeap;
+    ComPtr<ID3D12Resource > m_timestampReadback;
+    UINT64                * m_timestampMap    = nullptr;
+    UINT64                  m_qpcFrequency    = 0;
+    bool                    m_timingSupported = false;
+
+    bool InitTiming(ID3D12Device3 * device, UINT slotCount);
+    bool Submit(CD3D12CommandSlot& slot);
+    bool SnapshotTiming(CD3D12CommandSlot& slot) const;
+    bool GetGPUTimes(const CD3D12CommandSlot& slot,
+      uint64_t& start, uint64_t& end) const;
+
+  public:
+    ~CD3D12CommandQueue() { DeInit(); }
+
+    bool Init(ID3D12Device3 * device, D3D12_COMMAND_LIST_TYPE type,
+      const WCHAR * name, CD3D12CommandSlot::CallbackMode callbackMode,
+      UINT slotCount, bool enableTiming = false);
+    void DeInit();
+
+    CD3D12CommandSlot * Acquire(UINT slotIndex);
+    CD3D12CommandSlot * Acquire();
+    void WaitForIdle();
+};