[idd] capture: split software and hardware frame processors

Move cadence-aware hardware capture and immediate software capture
behind a common frame processor interface.

Keep shared damage tracking and frame-buffer ownership in the base
processor, and move stateless format, resource, and rectangle helpers
into CFrameProcessorUtil.

Decouple frame-buffer resources from CSwapChainProcessor by passing the
device dependencies they use directly.

idd/LGIdd/CSoftwareFrameProcessor.h

@@ -0,0 +1,46 @@
+/**
+ * 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 "CFrameProcessor.h"
+
+class CSoftwareFrameProcessor final : public CFrameProcessor
+{
+private:
+  bool m_directTexture;
+
+  static void CompletionFunction(
+    CD3D12CommandSlot * slot, bool result, void * param1, void * param2);
+
+public:
+  CSoftwareFrameProcessor(CIndirectDeviceContext * device,
+    std::shared_ptr<CD3D12Device> dx12,
+    CPostProcessor postProcessors[LGMP_Q_FRAME_LEN],
+    SRWLOCK * pipelineLock, HANDLE terminateEvent);
+
+  bool Submit(const FrameSubmission& submission) override;
+  bool HasReadyFrame() const override { return false; }
+  bool Publish(const CFrameScheduler::Schedule&, bool, uint64_t) override
+  {
+    return false;
+  }
+  bool UsesCadence() const override { return false; }
+};