1 /*
2  * Copyright (C) 2006 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.graphics;
18 
19 /**
20  * MaskFilter is the base class for object that perform transformations on
21  * an alpha-channel mask before drawing it. A subclass of MaskFilter may be
22  * installed into a Paint. Blur and emboss are implemented as subclasses of MaskFilter.
23  */
24 public class MaskFilter {
25 
finalize()26     protected void finalize() throws Throwable {
27         nativeDestructor(native_instance);
28         native_instance = 0;  // Other finalizers can still call us.
29     }
30 
nativeDestructor(long native_filter)31     private static native void nativeDestructor(long native_filter);
32     long native_instance;
33 }
34