[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.cc

@@ -0,0 +1,76 @@
+/**
+ ******************************************************************************
+ * 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. *
+ ******************************************************************************
+ */
+
+#include "xenia/ui/renderdoc_api.h"
+
+#include "xenia/base/assert.h"
+#include "xenia/base/logging.h"
+#include "xenia/base/platform.h"
+
+#if XE_PLATFORM_LINUX
+#include <dlfcn.h>
+#elif XE_PLATFORM_WIN32
+#include "xenia/base/platform_win.h"
+#endif
+
+namespace xe {
+namespace ui {
+
+bool RenderdocApi::Initialize() {
+  Shutdown();
+  pRENDERDOC_GetAPI get_api = nullptr;
+  // The RenderDoc library should be already loaded into the process if
+  // RenderDoc is attached - this is why RTLD_NOLOAD or GetModuleHandle instead
+  // of LoadLibrary.
+#if XE_PLATFORM_LINUX
+#if XE_PLATFORM_ANDROID
+  const char* librenderdoc_name = "libVkLayer_GLES_RenderDoc.so";
+#else
+  const char* librenderdoc_name = "librenderdoc.so";
+#endif
+  library_ = dlopen(librenderdoc_name, RTLD_NOW | RTLD_NOLOAD);
+  if (library_) {
+    get_api = pRENDERDOC_GetAPI(dlsym(library_, "RENDERDOC_GetAPI"));
+  }
+#elif XE_PLATFORM_WIN32
+  library_ = GetModuleHandleA("renderdoc.dll");
+  if (library_) {
+    get_api = pRENDERDOC_GetAPI(
+        GetProcAddress(HMODULE(library_), "RENDERDOC_GetAPI"));
+  }
+#endif
+  if (!get_api) {
+    Shutdown();
+    return false;
+  }
+  // get_api will be null if RenderDoc is not attached, or the API isn't
+  // available on this platform, or there was an error.
+  if (!get_api || !get_api(eRENDERDOC_API_Version_1_0_0, (void**)&api_1_0_0_) ||
+      !api_1_0_0_) {
+    Shutdown();
+    return false;
+  }
+  XELOGI("RenderDoc API initialized");
+  return true;
+}
+
+void RenderdocApi::Shutdown() {
+  api_1_0_0_ = nullptr;
+  if (library_) {
+#if XE_PLATFORM_LINUX
+    dlclose(library_);
+#endif
+    // Not calling FreeLibrary on Windows as GetModuleHandle doesn't increment
+    // the reference count.
+    library_ = nullptr;
+  }
+}
+
+}  // namespace ui
+}  // namespace xe