8210384: SunLayoutEngine.isAAT() font is expensive on MacOS

Reviewed-by: dmarkov, kaddepalli

src/share/classes/sun/font/SunLayoutEngine.java

@@ -35,6 +35,7 @@ import java.awt.geom.Point2D;
 import java.lang.ref.SoftReference;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.Locale;
+import java.util.WeakHashMap;
 
 /*
  * different ways to do this
@@ -149,17 +150,30 @@ public final class SunLayoutEngine implements LayoutEngine, LayoutEngineFactory
         this.key = key;
     }
 
+    static WeakHashMap<Font2D, Boolean> aatInfo = new WeakHashMap<>();
+
     private boolean isAAT(Font2D font) {
+        Boolean aatObj;
+        synchronized (aatInfo) {
+            aatObj = aatInfo.get(font);
+        }
+        if (aatObj != null) {
+            return aatObj.booleanValue();
+        }
+        boolean aat = false;
         if (font instanceof TrueTypeFont) {
             TrueTypeFont ttf = (TrueTypeFont)font;
-            return ttf.getDirectoryEntry(TrueTypeFont.morxTag) != null ||
+            aat =  ttf.getDirectoryEntry(TrueTypeFont.morxTag) != null ||
                    ttf.getDirectoryEntry(TrueTypeFont.mortTag) != null;
         } else if (font instanceof PhysicalFont) {
             PhysicalFont pf = (PhysicalFont)font;
-            return pf.getTableBytes(TrueTypeFont.morxTag) != null ||
+            aat =  pf.getTableBytes(TrueTypeFont.morxTag) != null ||
                    pf.getTableBytes(TrueTypeFont.mortTag) != null;
         }
-        return false;
+        synchronized (aatInfo) {
+            aatInfo.put(font, Boolean.valueOf(aat));
+        }
+        return aat;
     }
 
     public void layout(FontStrikeDesc desc, float[] mat, int gmask,