1 files changed, 8 insertions, 1 deletions
diff --git a/tools/layoutlib/bridge/src/android/graphics/Shader_Delegate.java b/tools/layoutlib/bridge/src/android/graphics/Shader_Delegate.java
index 368c0384..65919ad 100644
--- a/tools/layoutlib/bridge/src/android/graphics/Shader_Delegate.java
+++ b/tools/layoutlib/bridge/src/android/graphics/Shader_Delegate.java
@@ -73,6 +73,14 @@ public abstract class Shader_Delegate {
     public abstract boolean isSupported();
     public abstract String getSupportMessage();
 
+    public boolean isValid() {
+        if (mLocalMatrix != null && mLocalMatrix.getAffineTransform().getDeterminant() == 0) {
+            return false;
+        }
+
+        return true;
+    }
+
     // ---- native methods ----
 
     @LayoutlibDelegate
@@ -101,5 +109,4 @@ public abstract class Shader_Delegate {
 
         return new java.awt.geom.AffineTransform();
     }
-
 }