[UI] Image post-processing and full presentation/window rework

[GPU] Add FXAA post-processing
[UI] Add FidelityFX FSR and CAS post-processing
[UI] Add blue noise dithering from 10bpc to 8bpc
[GPU] Apply the DC PWL gamma ramp closer to the spec, supporting fully white color
[UI] Allow the GPU CP thread to present on the host directly, bypassing the UI thread OS paint event
[UI] Allow variable refresh rate (or tearing)
[UI] Present the newest frame (restart) on DXGI
[UI] Replace GraphicsContext with a far more advanced Presenter with more coherent surface connection and UI overlay state management
[UI] Connect presentation to windows via the Surface class, not native window handles
[Vulkan] Switch to simpler Vulkan setup with no instance/device separation due to interdependencies and to pass fewer objects around
[Vulkan] Lower the minimum required Vulkan version to 1.0
[UI/GPU] Various cleanup, mainly ComPtr usage
[UI] Support per-monitor DPI awareness v2 on Windows
[UI] DPI-scale Dear ImGui
[UI] Replace the remaining non-detachable window delegates with unified window event and input listeners
[UI] Allow listeners to safely destroy or close the window, and to register/unregister listeners without use-after-free and the ABA problem
[UI] Explicit Z ordering of input listeners and UI overlays, top-down for input, bottom-up for drawing
[UI] Add explicit window lifecycle phases
[UI] Replace Window virtual functions with explicit desired state, its application, actual state, its feedback
[UI] GTK: Apply the initial size to the drawing area
[UI] Limit internal UI frame rate to that of the monitor
[UI] Hide the cursor using a timer instead of polling due to no repeated UI thread paints with GPU CP thread presentation, and only within the window

src/xenia/ui/renderdoc_api.h

@@ -0,0 +1,39 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2021 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_UI_RENDERDOC_API_H_
+#define XENIA_UI_RENDERDOC_API_H_
+
+#include "third_party/renderdoc/renderdoc_app.h"
+
+namespace xe {
+namespace ui {
+
+class RenderdocApi {
+ public:
+  RenderdocApi() = default;
+  RenderdocApi(const RenderdocApi& renderdoc_api) = delete;
+  RenderdocApi& operator=(const RenderdocApi& renderdoc_api) = delete;
+  ~RenderdocApi() { Shutdown(); }
+
+  bool Initialize();
+  void Shutdown();
+
+  // nullptr if not attached.
+  const RENDERDOC_API_1_0_0* api_1_0_0() const { return api_1_0_0_; }
+
+ private:
+  void* library_ = nullptr;
+  const RENDERDOC_API_1_0_0* api_1_0_0_ = nullptr;
+};
+
+}  // namespace ui
+}  // namespace xe
+
+#endif  // XENIA_UI_RENDERDOC_API_H_