Update ImageDrawable with antialias, dither, filter, and tile modes

core/src/main/java/icyllis/modernui/graphics/ImageShader.java

@@ -216,6 +216,22 @@ public boolean getLocalMatrix(@NonNull Matrix localMatrix) {
         return false;
     }
 
+    /**
+     * Return true if the local matrix of the shader is equal to the given local matrix.
+     *
+     * @param localMatrix the local matrix to compare, null means identity
+     * @return true if local matrix equals
+     */
+    public boolean localMatrixEquals(@Nullable Matrix localMatrix) {
+        if (localMatrix == null || localMatrix.isIdentity()) {
+            return mLocalMatrix == null;
+        } else if (mLocalMatrix == null) {
+            return false;
+        } else {
+            return mLocalMatrix.equals(localMatrix);
+        }
+    }
+
     /**
      * @hidden
      */

core/src/main/java/icyllis/modernui/graphics/drawable/Drawable.java

@@ -401,6 +401,7 @@ public void setAlpha(int alpha) {
      * return value is 255 if the class does not override this method to return a value
      * specific to its use of alpha.
      */
+    @IntRange(from = 0, to = 255)
     public int getAlpha() {
         return 0xFF;
     }