Merge "Add comment to Shader#mLocalMatrix"

1 files changed, 4 insertions, 1 deletions

diff --git a/graphics/java/android/graphics/Shader.java b/graphics/java/android/graphics/Shader.java
index a91b410eceb3..b584e0dd0417 100644
--- a/graphics/java/android/graphics/Shader.java
+++ b/graphics/java/android/graphics/Shader.java
@@ -38,6 +38,9 @@ public class Shader {
      */
     private long mNativeInstance;
 
+    /**
+     * Current matrix - always set to null if local matrix is identity.
+     */
     private Matrix mLocalMatrix;
 
     public enum TileMode {
@@ -70,7 +73,7 @@ public class Shader {
     public boolean getLocalMatrix(@NonNull Matrix localM) {
         if (mLocalMatrix != null) {
             localM.set(mLocalMatrix);
-            return true;
+            return true; // presence of mLocalMatrix means it's not identity
         }
         return false;
     }