[D3D12] D3D12Context initialization

src/xenia/ui/d3d12/d3d12_context.h

@@ -0,0 +1,70 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2018 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_UI_D3D12_D3D12_CONTEXT_H_
+#define XENIA_UI_D3D12_D3D12_CONTEXT_H_
+
+#include "xenia/ui/d3d12/d3d12_api.h"
+#include "xenia/ui/graphics_context.h"
+
+namespace xe {
+namespace ui {
+namespace d3d12 {
+
+class D3D12Context : public GraphicsContext {
+ public:
+  ~D3D12Context() override;
+
+  ImmediateDrawer* immediate_drawer() override;
+
+  bool is_current() override;
+  bool MakeCurrent() override;
+  void ClearCurrent() override;
+
+  bool WasLost() override { return context_lost_; }
+
+  std::unique_ptr<RawImage> Capture() override;
+
+  // The count of copies of transient objects (like command lists, dynamic
+  // descriptor heaps) that must be kept when rendering with this context.
+  static constexpr uint32_t kFrameQueueLength = 3;
+
+ private:
+  friend class D3D12Provider;
+
+  explicit D3D12Context(D3D12Provider* provider, Window* target_window);
+
+ private:
+  bool Initialize();
+  void Shutdown();
+
+  bool initialized_fully_ = false;
+
+  bool context_lost_ = false;
+
+  struct Fence {
+    ID3D12Fence* fence = nullptr;
+    HANDLE completion_event = nullptr;
+    // 0 means the fence signal command hasn't been submitted at all yet.
+    uint64_t queued_value = 0;
+  };
+  Fence fences_[kFrameQueueLength];
+
+  static constexpr uint32_t kSwapChainBufferCount = 3;
+  IDXGISwapChain3* swap_chain_ = nullptr;
+  ID3D12Resource* swap_chain_buffers_[kSwapChainBufferCount] = {};
+
+  std::unique_ptr<D3D12ImmediateDrawer> immediate_drawer_ = nullptr;
+};
+
+}  // namespace d3d12
+}  // namespace ui
+}  // namespace xe
+
+#endif  // XENIA_UI_D3D12_D3D12_CONTEXT_H_