Tell when glass can be drawn at all

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/main/java/org/saturnclient/config/Config.java

@@ -34,6 +34,15 @@ public class Config {
         return Property.floatProp(1f).range(0.5f, 2f, 0.05f).unit("×");
     }
 
+    /**
+     * Whether any glass can be drawn: a glass blur is on, and a background it
+     * goes behind isn't solid.
+     */
+    public static boolean usesGlass() {
+        boolean translucent = Theme.getPanelBg() >>> 24 < 0xFF || Theme.PRIMARY.value >>> 24 < 0xFF;
+        return translucent && (menuBlur.value > 0 || widgetBlur.value > 0);
+    }
+
     public static IdentifierRef getLogo() {
         return realisticLogo.value ? Textures.REALISTIC_LOGO : Textures.LOGO;
     }