Glop text shadows, clearLayerRegions, and rectangleList

Change-Id: I83b36d1ee5d8f05f41acf244639019f9b8da79cd
diff --git a/libs/hwui/FloatColor.h b/libs/hwui/FloatColor.h
index b3bd5fd..97dec88 100644
--- a/libs/hwui/FloatColor.h
+++ b/libs/hwui/FloatColor.h
@@ -31,6 +31,13 @@
         b = a * ((color      ) & 0xff) / 255.0f;
     }
 
+    bool isNotBlack() {
+        return a < 1.0f
+                || r > 0.0f
+                || g > 0.0f
+                || b > 0.0f;
+    }
+
     float r;
     float g;
     float b;