[hud] Add method to check whether HUD is empty

src/dxvk/hud/dxvk_hud.h

@@ -40,6 +40,14 @@ namespace dxvk::hud {
       const DxvkContextObjects& ctx,
       const Rc<DxvkImageView>&  dstView);
 
+    /**
+     * \brief Checks whether the HUD is empty
+     * \returns \c true if the HUD is empty
+     */
+    bool empty() const {
+      return m_hudItems.empty();
+    }
+
     /**
      * \brief Adds a HUD item if enabled
      *

src/dxvk/hud/dxvk_hud_item.h

@@ -82,6 +82,14 @@ namespace dxvk::hud {
       const HudOptions&         options,
             HudRenderer&        renderer);
 
+    /**
+     * \brief Checks whether the item set is empty
+     * \returns \c true if there are no items
+     */
+    bool empty() const {
+      return m_items.empty();
+    }
+
     /**
      * \brief Creates a HUD item if enabled
      *