ImGuiOverlays: Add blur background to save state selector

src/core/fullscreenui_widgets.cpp

@@ -1902,6 +1902,42 @@ void FullscreenUI::SetWindowNavWrapping(bool allow_wrap_x /*= false*/, bool allo
   }
 }
 
+bool FullscreenUI::BeginBlurWindow(const char* name, bool* p_open /* = nullptr */, ImGuiWindowFlags flags /* = 0 */,
+                                   bool blur /* = true */)
+{
+  const ImVec4& background = GImGui->Style.Colors[ImGuiCol_WindowBg];
+  const bool actually_blur = (blur && UIStyle.BlurMenuBackground && CanBlurBackground());
+  const bool has_background = (background.w != 0.0f);
+  const bool res = ImGui::Begin(name, nullptr,
+                                ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoResize |
+                                  ImGuiWindowFlags_NoBringToFrontOnFocus |
+                                  ((!has_background || actually_blur) ? ImGuiWindowFlags_NoBackground : 0) | flags);
+
+  if (res && actually_blur)
+  {
+    ImDrawList* const dl = ImGui::GetWindowDrawList();
+    ImGuiWindow* const win = ImGui::GetCurrentWindow();
+    const ImVec2& bg_min = win->Pos;
+    const ImVec2& bg_max = win->Pos + win->Size;
+    if (BeginBlurBackground(dl, bg_min, bg_max))
+    {
+      if (has_background)
+      {
+        dl->AddRectFilled(bg_min, bg_max,
+                          ImGui::GetColorU32(ImVec4(background.x * background.w, background.y * background.w,
+                                                    background.z * background.w, 1.0f)), win->WindowRounding);
+      }
+      EndBlurBackground(dl);
+    }
+    else if (has_background)
+    {
+      dl->AddRectFilled(bg_min, bg_max, ImGui::GetColorU32(background), win->WindowRounding);
+    }
+  }
+
+  return res;
+}
+
 bool FullscreenUI::IsGamepadInputSource()
 {
   return (ImGui::GetCurrentContext()->NavInputSource == ImGuiInputSource_Gamepad);

src/core/fullscreenui_widgets.h

@@ -197,6 +197,13 @@ ALWAYS_INLINE std::string_view RemoveHash(std::string_view s)
   return (pos != std::string_view::npos) ? s.substr(0, pos) : s;
 }
 
+#if 0
+ALWAYS_INLINE ImVec2 ApplyPivot(const ImVec2& pos, const ImVec2& size, const ImVec2& pivot)
+{
+  return ImVec2(pos.x - size.x * pivot.x, pos.y - size.y * pivot.y);
+}
+#endif
+
 /// Localization support.
 #define FSUI_TR_CONTEXT std::string_view("FullscreenUI")
 
@@ -361,6 +368,7 @@ bool BeginFullscreenWindow(const ImVec2& position, const ImVec2& size, const cha
                            const ImVec2& padding = ImVec2(), ImGuiWindowFlags flags = 0, bool blur = false);
 void EndFullscreenWindow(bool allow_wrap_x = false, bool allow_wrap_y = true);
 void SetWindowNavWrapping(bool allow_wrap_x = false, bool allow_wrap_y = true);
+bool BeginBlurWindow(const char* name, bool* p_open = nullptr, ImGuiWindowFlags flags = 0, bool blur = true);
 
 bool IsGamepadInputSource();
 std::string_view GetControllerIconMapping(std::string_view icon);

src/core/imgui_overlays.cpp

@@ -1225,9 +1225,10 @@ void SaveStateSelectorUI::Draw()
   ImGui::SetNextWindowPos(ImVec2(io.DisplaySize.x * 0.5f, io.DisplaySize.y * 0.5f), ImGuiCond_Always,
                           ImVec2(0.5f, 0.5f));
 
-  if (ImGui::Begin("##save_state_selector", nullptr,
-                   ImGuiWindowFlags_NoFocusOnAppearing | ImGuiWindowFlags_NoInputs | ImGuiWindowFlags_NoTitleBar |
-                     ImGuiWindowFlags_NoScrollbar))
+  if (FullscreenUI::BeginBlurWindow("##save_state_selector", nullptr,
+                                    ImGuiWindowFlags_NoFocusOnAppearing | ImGuiWindowFlags_NoInputs |
+                                      ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoScrollbar,
+                                    UIStyle.BlurMenuBackground))
   {
     // Leave 2 lines for the legend
     const ImGuiStyle& style = ImGui::GetStyle();