MaskFilter_Delegate.java revision d43909c7503e11eb335a452d296a10804bb01fd6
1/* 2 * Copyright (C) 2010 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 17package android.graphics; 18 19import com.android.layoutlib.bridge.impl.DelegateManager; 20 21/** 22 * Delegate implementing the native methods of android.graphics.MaskFilter 23 * 24 * Through the layoutlib_create tool, the original native methods of MaskFilter have been replaced 25 * by calls to methods of the same name in this delegate class. 26 * 27 * This class behaves like the original native implementation, but in Java, keeping previously 28 * native data into its own objects and mapping them to int that are sent back and forth between 29 * it and the original MaskFilter class. 30 * 31 * This also serve as a base class for all MaskFilter delegate classes. 32 * 33 * @see DelegateManager 34 * 35 */ 36public abstract class MaskFilter_Delegate { 37 38 // ---- delegate manager ---- 39 protected static final DelegateManager<MaskFilter_Delegate> sManager = 40 new DelegateManager<MaskFilter_Delegate>(); 41 42 // ---- delegate helper data ---- 43 44 // ---- delegate data ---- 45 46 // ---- Public Helper methods ---- 47 48 public static MaskFilter_Delegate getDelegate(int nativeShader) { 49 return sManager.getDelegate(nativeShader); 50 } 51 52 public abstract boolean isSupported(); 53 public abstract String getSupportMessage(); 54 55 // ---- native methods ---- 56 57 /*package*/ static void nativeDestructor(int native_filter) { 58 sManager.removeDelegate(native_filter); 59 } 60 61 // ---- Private delegate/helper methods ---- 62} 63