ImGuiManager: Extract out gradient rect function

src/core/fullscreenui_widgets.cpp

@@ -1317,6 +1317,16 @@ void FullscreenUI::PopPrimaryColor()
   ImGui::PopStyleColor(5);
 }
 
+void FullscreenUI::DrawRoundedGradientRect(ImDrawList* const dl, const ImVec2& pos_min, const ImVec2& pos_max,
+                                           ImU32 col_left, ImU32 col_right, float rounding)
+{
+  dl->AddRectFilled(pos_min, ImVec2(pos_min.x + rounding, pos_max.y), col_left, rounding, ImDrawFlags_RoundCornersLeft);
+  dl->AddRectFilledMultiColor(ImVec2(pos_min.x + rounding, pos_min.y), ImVec2(pos_max.x - rounding, pos_max.y),
+                              col_left, col_right, col_right, col_left);
+  dl->AddRectFilled(ImVec2(pos_max.x - rounding, pos_min.y), pos_max, col_right, rounding,
+                    ImDrawFlags_RoundCornersRight);
+}
+
 bool FullscreenUI::BeginFullscreenColumns(const char* title, float pos_y, bool expand_to_screen_width, bool footer)
 {
   ImGui::SetNextWindowPos(ImVec2(expand_to_screen_width ? 0.0f : UIStyle.LayoutPaddingLeft, pos_y));

src/core/fullscreenui_widgets.h

@@ -308,6 +308,9 @@ void CancelPendingMenuClose();
 void PushPrimaryColor();
 void PopPrimaryColor();
 
+void DrawRoundedGradientRect(ImDrawList* const dl, const ImVec2& pos_min, const ImVec2& pos_max, ImU32 col_left,
+                             ImU32 col_right, float rounding);
+
 void DrawWindowTitle(std::string_view title);
 
 bool BeginFullscreenColumns(const char* title = nullptr, float pos_y = 0.0f, bool expand_to_screen_width = false,

src/util/imgui_manager.cpp

@@ -958,6 +958,7 @@ void ImGuiManager::AcquirePendingOSDMessages(Timer::Value current_time)
 void ImGuiManager::DrawOSDMessages(Timer::Value current_time)
 {
   using FullscreenUI::DarkerColor;
+  using FullscreenUI::DrawRoundedGradientRect;
   using FullscreenUI::ModAlpha;
   using FullscreenUI::RenderShadowedTextClipped;
   using FullscreenUI::UIStyle;
@@ -1105,19 +1106,13 @@ void ImGuiManager::DrawOSDMessages(Timer::Value current_time)
     ImDrawList* const dl = ImGui::GetForegroundDrawList();
 
     const float background_opacity = opacity * 0.95f;
-    const u32 left_background_color32 = ImGui::GetColorU32(ModAlpha(left_background_color, background_opacity));
-    const u32 right_background_color32 = ImGui::GetColorU32(
-      ModAlpha(ImLerp(left_background_color, right_background_color,
-                      std::min((box_width - min_rounded_width) / (max_width_for_color - min_rounded_width), 1.0f)),
-               background_opacity));
-
-    dl->AddRectFilled(pos, ImVec2(pos.x + rounding, pos_max.y), left_background_color32, rounding,
-                      ImDrawFlags_RoundCornersLeft);
-    dl->AddRectFilledMultiColor(ImVec2(pos.x + rounding, pos.y), ImVec2(pos_max.x - rounding, pos_max.y),
-                                left_background_color32, right_background_color32, right_background_color32,
-                                left_background_color32);
-    dl->AddRectFilled(ImVec2(pos_max.x - rounding, pos.y), pos_max, right_background_color32, rounding,
-                      ImDrawFlags_RoundCornersRight);
+    DrawRoundedGradientRect(
+      dl, pos, pos_max, ImGui::GetColorU32(ModAlpha(left_background_color, background_opacity)),
+      ImGui::GetColorU32(
+        ModAlpha(ImLerp(left_background_color, right_background_color,
+                        std::min((box_width - min_rounded_width) / (max_width_for_color - min_rounded_width), 1.0f)),
+                 background_opacity)),
+      rounding);
 
     const ImVec2 base_pos = ImVec2(pos.x + padding, pos.y + padding);
     const ImU32 color = ImGui::GetColorU32(ModAlpha(text_color, opacity));